Statement

所有超级接口:

AutoCloseable, Wrapper

所有已知子接口:

CallableStatement, PreparedStatement
```
public interface Statement
extends Wrapper, AutoCloseable
```
The object used for executing a static SQL statement and returning the results it produces.
By default, only one ResultSet object per Statement object can be open at the same time. Therefore, if the reading of one ResultSet object is interleaved with the reading of another, each must have been generated by different Statement objects. All execution methods in the Statement interface implicitly close a current ResultSet object of the statement if an open one exists.

另请参阅:

Connection.createStatement(), ResultSet

字段概要

字段
限定符和类型	字段	说明
`static int`	`CLOSE_ALL_RESULTS`	The constant indicating that all `ResultSet` objects that have previously been kept open should be closed when calling `getMoreResults`.
`static int`	`CLOSE_CURRENT_RESULT`	The constant indicating that the current `ResultSet` object should be closed when calling `getMoreResults`.
`static int`	`EXECUTE_FAILED`	The constant indicating that an error occurred while executing a batch statement.
`static int`	`KEEP_CURRENT_RESULT`	The constant indicating that the current `ResultSet` object should not be closed when calling `getMoreResults`.
`static int`	`NO_GENERATED_KEYS`	The constant indicating that generated keys should not be made available for retrieval.
`static int`	`RETURN_GENERATED_KEYS`	The constant indicating that generated keys should be made available for retrieval.
`static int`	`SUCCESS_NO_INFO`	The constant indicating that a batch statement executed successfully but that no count of the number of rows it affected is available.

方法概要

所有方法实例方法抽象方法
限定符和类型	方法	说明
`void`	`addBatch(String sql)`	Adds the given SQL command to the current list of commands for this `Statement` object.
`void`	`cancel()`	Cancels this `Statement` object if both the DBMS and driver support aborting an SQL statement.
`void`	`clearBatch()`	Empties this `Statement` object's current list of SQL commands.
`void`	`clearWarnings()`	Clears all the warnings reported on this `Statement` object.
`void`	`close()`	Releases this `Statement` object's database and JDBC resources immediately instead of waiting for this to happen when it is automatically closed.
`boolean`	`execute(String sql)`	Executes the given SQL statement, which may return multiple results.
`boolean`	`execute(String sql, int autoGeneratedKeys)`	Executes the given SQL statement, which may return multiple results, and signals the driver that any auto-generated keys should be made available for retrieval.
`boolean`	`execute(String sql, int[] columnIndexes)`	Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.
`boolean`	`execute(String sql, String[] columnNames)`	Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.
`int[]`	`executeBatch()`	Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts.
`ResultSet`	`executeQuery(String sql)`	Executes the given SQL statement, which returns a single `ResultSet` object.
`int`	`executeUpdate(String sql)`	Executes the given SQL statement, which may be an `INSERT`, `UPDATE`, or `DELETE` statement or an SQL statement that returns nothing, such as an SQL DDL statement.
`int`	`executeUpdate(String sql, int autoGeneratedKeys)`	Executes the given SQL statement and signals the driver with the given flag about whether the auto-generated keys produced by this `Statement` object should be made available for retrieval.
`int`	`executeUpdate(String sql, int[] columnIndexes)`	Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.
`int`	`executeUpdate(String sql, String[] columnNames)`	Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval.
`Connection`	`getConnection()`	Retrieves the `Connection` object that produced this `Statement` object.
`int`	`getFetchDirection()`	Retrieves the direction for fetching rows from database tables that is the default for result sets generated from this `Statement` object.
`int`	`getFetchSize()`	Retrieves the number of result set rows that is the default fetch size for `ResultSet` objects generated from this `Statement` object.
`ResultSet`	`getGeneratedKeys()`	Retrieves any auto-generated keys created as a result of executing this `Statement` object.
`int`	`getMaxFieldSize()`	Retrieves the maximum number of bytes that can be returned for character and binary column values in a `ResultSet` object produced by this `Statement` object.
`int`	`getMaxRows()`	Retrieves the maximum number of rows that a `ResultSet` object produced by this `Statement` object can contain.
`boolean`	`getMoreResults()`	Moves to this `Statement` object's next result, returns `true` if it is a `ResultSet` object, and implicitly closes any current `ResultSet` object(s) obtained with the method `getResultSet`.
`boolean`	`getMoreResults(int current)`	Moves to this `Statement` object's next result, deals with any current `ResultSet` object(s) according to the instructions specified by the given flag, and returns `true` if the next result is a `ResultSet` object.
`int`	`getQueryTimeout()`	Retrieves the number of seconds the driver will wait for a `Statement` object to execute.
`ResultSet`	`getResultSet()`	Retrieves the current result as a `ResultSet` object.
`int`	`getResultSetConcurrency()`	Retrieves the result set concurrency for `ResultSet` objects generated by this `Statement` object.
`int`	`getResultSetHoldability()`	Retrieves the result set holdability for `ResultSet` objects generated by this `Statement` object.
`int`	`getResultSetType()`	Retrieves the result set type for `ResultSet` objects generated by this `Statement` object.
`int`	`getUpdateCount()`	Retrieves the current result as an update count; if the result is a `ResultSet` object or there are no more results, -1 is returned.
`SQLWarning`	`getWarnings()`	Retrieves the first warning reported by calls on this `Statement` object.
`boolean`	`isClosed()`	Retrieves whether this `Statement` object has been closed.
`boolean`	`isPoolable()`	Returns a value indicating whether the `Statement` is poolable or not.
`void`	`setCursorName(String name)`	Sets the SQL cursor name to the given `String`, which will be used by subsequent `Statement` object `execute` methods.
`void`	`setEscapeProcessing(boolean enable)`	Sets escape processing on or off.
`void`	`setFetchDirection(int direction)`	Gives the driver a hint as to the direction in which rows will be processed in `ResultSet` objects created using this `Statement` object.
`void`	`setFetchSize(int rows)`	Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed for `ResultSet` objects generated by this `Statement`.
`void`	`setMaxFieldSize(int max)`	Sets the limit for the maximum number of bytes that can be returned for character and binary column values in a `ResultSet` object produced by this `Statement` object.
`void`	`setMaxRows(int max)`	Sets the limit for the maximum number of rows that any `ResultSet` object generated by this `Statement` object can contain to the given number.
`void`	`setPoolable(boolean poolable)`	Requests that a `Statement` be pooled or not pooled.
`void`	`setQueryTimeout(int seconds)`	Sets the number of seconds the driver will wait for a `Statement` object to execute to the given number of seconds.

从接口继承的方法 java.sql.Wrapper
isWrapperFor, unwrap

- 字段详细资料
  - CLOSE_ALL_RESULTS
```
static final int CLOSE_ALL_RESULTS
```
    The constant indicating that all ResultSet objects that have previously been kept open should be closed when calling getMoreResults.
    
    从以下版本开始:
    
    1.4
    
    另请参阅:
    
    常量字段值
  - CLOSE_CURRENT_RESULT
```
static final int CLOSE_CURRENT_RESULT
```
    The constant indicating that the current ResultSet object should be closed when calling getMoreResults.
    
    从以下版本开始:
    
    1.4
    
    另请参阅:
    
    常量字段值
  - EXECUTE_FAILED
```
static final int EXECUTE_FAILED
```
    The constant indicating that an error occurred while executing a batch statement.
    
    从以下版本开始:
    
    1.4
    
    另请参阅:
    
    常量字段值
  - KEEP_CURRENT_RESULT
```
static final int KEEP_CURRENT_RESULT
```
    The constant indicating that the current ResultSet object should not be closed when calling getMoreResults.
    
    从以下版本开始:
    
    1.4
    
    另请参阅:
    
    常量字段值
  - NO_GENERATED_KEYS
```
static final int NO_GENERATED_KEYS
```
    The constant indicating that generated keys should not be made available for retrieval.
    
    从以下版本开始:
    
    1.4
    
    另请参阅:
    
    常量字段值
  - RETURN_GENERATED_KEYS
```
static final int RETURN_GENERATED_KEYS
```
    The constant indicating that generated keys should be made available for retrieval.
    
    从以下版本开始:
    
    1.4
    
    另请参阅:
    
    常量字段值
  - SUCCESS_NO_INFO
```
static final int SUCCESS_NO_INFO
```
    The constant indicating that a batch statement executed successfully but that no count of the number of rows it affected is available.
    
    从以下版本开始:
    
    1.4
    
    另请参阅:
    
    常量字段值
- 方法详细资料
  - executeQuery
```
ResultSet executeQuery(String sql)
                throws SQLException
```
    Executes the given SQL statement, which returns a single ResultSet object.
    Note:This method cannot be called on a PreparedStatement or CallableStatement.
    
    参数:
    
    sql - an SQL statement to be sent to the database, typically a static SQL SELECT statement
    
    返回:
    
    a ResultSet object that contains the data produced by the given query; never null
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement, the given SQL statement produces anything other than a single ResultSet object, the method is called on a PreparedStatement or CallableStatement
    
    SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement
  - executeUpdate
```
int executeUpdate(String sql)
           throws SQLException
```
    Executes the given SQL statement, which may be an INSERT, UPDATE, or DELETE statement or an SQL statement that returns nothing, such as an SQL DDL statement.
    Note:This method cannot be called on a PreparedStatement or CallableStatement.
    
    参数:
    
    sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.
    
    返回:
    
    either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements that return nothing
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement, the given SQL statement produces a ResultSet object, the method is called on a PreparedStatement or CallableStatement
    
    SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement
  - close
```
void close()
    throws SQLException
```
    Releases this Statement object's database and JDBC resources immediately instead of waiting for this to happen when it is automatically closed. It is generally good practice to release resources as soon as you are finished with them to avoid tying up database resources.
    Calling the method close on a Statement object that is already closed has no effect.
    Note:When a Statement object is closed, its current ResultSet object, if one exists, is also closed.
    
    指定者:
    
    close 在接口中 AutoCloseable
    
    抛出:
    
    SQLException - if a database access error occurs
  - getMaxFieldSize
```
int getMaxFieldSize()
             throws SQLException
```
    Retrieves the maximum number of bytes that can be returned for character and binary column values in a ResultSet object produced by this Statement object. This limit applies only to BINARY, VARBINARY, LONGVARBINARY, CHAR, VARCHAR, NCHAR, NVARCHAR, LONGNVARCHAR and LONGVARCHAR columns. If the limit is exceeded, the excess data is silently discarded.
    
    返回:
    
    the current column size limit for columns storing character and binary values; zero means there is no limit
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    另请参阅:
    
    setMaxFieldSize(int)
  - setMaxFieldSize
```
void setMaxFieldSize(int max)
              throws SQLException
```
    Sets the limit for the maximum number of bytes that can be returned for character and binary column values in a ResultSet object produced by this Statement object. This limit applies only to BINARY, VARBINARY, LONGVARBINARY, CHAR, VARCHAR, NCHAR, NVARCHAR, LONGNVARCHAR and LONGVARCHAR fields. If the limit is exceeded, the excess data is silently discarded. For maximum portability, use values greater than 256.
    
    参数:
    
    max - the new column size limit in bytes; zero means there is no limit
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement or the condition max >= 0 is not satisfied
    
    另请参阅:
    
    getMaxFieldSize()
  - getMaxRows
```
int getMaxRows()
        throws SQLException
```
    Retrieves the maximum number of rows that a ResultSet object produced by this Statement object can contain. If this limit is exceeded, the excess rows are silently dropped.
    
    返回:
    
    the current maximum number of rows for a ResultSet object produced by this Statement object; zero means there is no limit
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    另请参阅:
    
    setMaxRows(int)
  - setMaxRows
```
void setMaxRows(int max)
         throws SQLException
```
    Sets the limit for the maximum number of rows that any ResultSet object generated by this Statement object can contain to the given number. If the limit is exceeded, the excess rows are silently dropped.
    
    参数:
    
    max - the new max rows limit; zero means there is no limit
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement or the condition max >= 0 is not satisfied
    
    另请参阅:
    
    getMaxRows()
  - setEscapeProcessing
```
void setEscapeProcessing(boolean enable)
                  throws SQLException
```
    Sets escape processing on or off. If escape scanning is on (the default), the driver will do escape substitution before sending the SQL statement to the database.
    The Connection and DataSource property escapeProcessing may be used to change the default escape processing behavior. A value of true (the default) enables escape Processing for all Statement objects. A value of false disables escape processing for all Statement objects. The setEscapeProcessing method may be used to specify the escape processing behavior for an individual Statement object.
    Note: Since prepared statements have usually been parsed prior to making this call, disabling escape processing for PreparedStatements objects will have no effect.
    
    参数:
    
    enable - true to enable escape processing; false to disable it
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
  - getQueryTimeout
```
int getQueryTimeout()
             throws SQLException
```
    Retrieves the number of seconds the driver will wait for a Statement object to execute. If the limit is exceeded, a SQLException is thrown.
    
    返回:
    
    the current query timeout limit in seconds; zero means there is no limit
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    另请参阅:
    
    setQueryTimeout(int)
  - setQueryTimeout
```
void setQueryTimeout(int seconds)
              throws SQLException
```
    Sets the number of seconds the driver will wait for a Statement object to execute to the given number of seconds. By default there is no limit on the amount of time allowed for a running statement to complete. If the limit is exceeded, an SQLTimeoutException is thrown. A JDBC driver must apply this limit to the execute, executeQuery and executeUpdate methods.
    Note: JDBC driver implementations may also apply this limit to ResultSet methods (consult your driver vendor documentation for details).
    Note: In the case of Statement batching, it is implementation defined as to whether the time-out is applied to individual SQL commands added via the addBatch method or to the entire batch of SQL commands invoked by the executeBatch method (consult your driver vendor documentation for details).
    
    参数:
    
    seconds - the new query timeout limit in seconds; zero means there is no limit
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement or the condition seconds >= 0 is not satisfied
    
    另请参阅:
    
    getQueryTimeout()
  - cancel
```
void cancel()
     throws SQLException
```
    Cancels this Statement object if both the DBMS and driver support aborting an SQL statement. This method can be used by one thread to cancel a statement that is being executed by another thread.
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    SQLFeatureNotSupportedException - if the JDBC driver does not support this method
  - getWarnings
```
SQLWarning getWarnings()
                throws SQLException
```
    Retrieves the first warning reported by calls on this Statement object. Subsequent Statement object warnings will be chained to this SQLWarning object.
    The warning chain is automatically cleared each time a statement is (re)executed. This method may not be called on a closed Statement object; doing so will cause an SQLException to be thrown.
    Note: If you are processing a ResultSet object, any warnings associated with reads on that ResultSet object will be chained on it rather than on the Statement object that produced it.
    
    返回:
    
    the first SQLWarning object or null if there are no warnings
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
  - clearWarnings
```
void clearWarnings()
            throws SQLException
```
    Clears all the warnings reported on this Statement object. After a call to this method, the method getWarnings will return null until a new warning is reported for this Statement object.
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
  - setCursorName
```
void setCursorName(String name)
            throws SQLException
```
    Sets the SQL cursor name to the given String, which will be used by subsequent Statement object execute methods. This name can then be used in SQL positioned update or delete statements to identify the current row in the ResultSet object generated by this statement. If the database does not support positioned update/delete, this method is a noop. To insure that a cursor has the proper isolation level to support updates, the cursor's SELECT statement should have the form SELECT FOR UPDATE. If FOR UPDATE is not present, positioned updates may fail.
    Note: By definition, the execution of positioned updates and deletes must be done by a different Statement object than the one that generated the ResultSet object being used for positioning. Also, cursor names must be unique within a connection.
    
    参数:
    
    name - the new cursor name, which must be unique within a connection
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    SQLFeatureNotSupportedException - if the JDBC driver does not support this method
  - execute
```
boolean execute(String sql)
         throws SQLException
```
    Executes the given SQL statement, which may return multiple results. In some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.
    The execute method executes an SQL statement and indicates the form of the first result. You must then use the methods getResultSet or getUpdateCount to retrieve the result, and getMoreResults to move to any subsequent result(s).
    Note:This method cannot be called on a PreparedStatement or CallableStatement.
    
    参数:
    
    sql - any SQL statement
    
    返回:
    
    true if the first result is a ResultSet object; false if it is an update count or there are no results
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement, the method is called on a PreparedStatement or CallableStatement
    
    SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement
    
    另请参阅:
    
    getResultSet(), getUpdateCount(), getMoreResults()
  - getResultSet
```
ResultSet getResultSet()
                throws SQLException
```
    Retrieves the current result as a ResultSet object. This method should be called only once per result.
    
    返回:
    
    the current result as a ResultSet object or null if the result is an update count or there are no more results
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    另请参阅:
    
    execute(java.lang.String)
  - getUpdateCount
```
int getUpdateCount()
            throws SQLException
```
    Retrieves the current result as an update count; if the result is a ResultSet object or there are no more results, -1 is returned. This method should be called only once per result.
    
    返回:
    
    the current result as an update count; -1 if the current result is a ResultSet object or there are no more results
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    另请参阅:
    
    execute(java.lang.String)
  - getMoreResults
```
boolean getMoreResults()
                throws SQLException
```
    Moves to this Statement object's next result, returns true if it is a ResultSet object, and implicitly closes any current ResultSet object(s) obtained with the method getResultSet.
    There are no more results when the following is true:
```
     // stmt is a Statement object
     ((stmt.getMoreResults() == false) && (stmt.getUpdateCount() == -1))
 
```
    返回:
    
    true if the next result is a ResultSet object; false if it is an update count or there are no more results
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    另请参阅:
    
    execute(java.lang.String)
  - setFetchDirection
```
void setFetchDirection(int direction)
                throws SQLException
```
    Gives the driver a hint as to the direction in which rows will be processed in ResultSet objects created using this Statement object. The default value is ResultSet.FETCH_FORWARD.
    Note that this method sets the default fetch direction for result sets generated by this Statement object. Each result set has its own methods for getting and setting its own fetch direction.
    
    参数:
    
    direction - the initial direction for processing rows
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement or the given direction is not one of ResultSet.FETCH_FORWARD, ResultSet.FETCH_REVERSE, or ResultSet.FETCH_UNKNOWN
    
    从以下版本开始:
    
    1.2
    
    另请参阅:
    
    getFetchDirection()
  - getFetchDirection
```
int getFetchDirection()
               throws SQLException
```
    Retrieves the direction for fetching rows from database tables that is the default for result sets generated from this Statement object. If this Statement object has not set a fetch direction by calling the method setFetchDirection, the return value is implementation-specific.
    
    返回:
    
    the default fetch direction for result sets generated from this Statement object
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    从以下版本开始:
    
    1.2
    
    另请参阅:
    
    setFetchDirection(int)
  - setFetchSize
```
void setFetchSize(int rows)
           throws SQLException
```
    Gives the JDBC driver a hint as to the number of rows that should be fetched from the database when more rows are needed for ResultSet objects generated by this Statement. If the value specified is zero, then the hint is ignored. The default value is zero.
    
    参数:
    
    rows - the number of rows to fetch
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement or the condition rows >= 0 is not satisfied.
    
    从以下版本开始:
    
    1.2
    
    另请参阅:
    
    getFetchSize()
  - getFetchSize
```
int getFetchSize()
          throws SQLException
```
    Retrieves the number of result set rows that is the default fetch size for ResultSet objects generated from this Statement object. If this Statement object has not set a fetch size by calling the method setFetchSize, the return value is implementation-specific.
    
    返回:
    
    the default fetch size for result sets generated from this Statement object
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    从以下版本开始:
    
    1.2
    
    另请参阅:
    
    setFetchSize(int)
  - getResultSetConcurrency
```
int getResultSetConcurrency()
                     throws SQLException
```
    Retrieves the result set concurrency for ResultSet objects generated by this Statement object.
    
    返回:
    
    either ResultSet.CONCUR_READ_ONLY or ResultSet.CONCUR_UPDATABLE
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    从以下版本开始:
    
    1.2
  - getResultSetType
```
int getResultSetType()
              throws SQLException
```
    Retrieves the result set type for ResultSet objects generated by this Statement object.
    
    返回:
    
    one of ResultSet.TYPE_FORWARD_ONLY, ResultSet.TYPE_SCROLL_INSENSITIVE, or ResultSet.TYPE_SCROLL_SENSITIVE
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    从以下版本开始:
    
    1.2
  - addBatch
```
void addBatch(String sql)
       throws SQLException
```
    Adds the given SQL command to the current list of commands for this Statement object. The commands in this list can be executed as a batch by calling the method executeBatch.
    Note:This method cannot be called on a PreparedStatement or CallableStatement.
    
    参数:
    
    sql - typically this is a SQL INSERT or UPDATE statement
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement, the driver does not support batch updates, the method is called on a PreparedStatement or CallableStatement
    
    从以下版本开始:
    
    1.2
    
    另请参阅:
    
    executeBatch(), DatabaseMetaData.supportsBatchUpdates()
  - clearBatch
```
void clearBatch()
         throws SQLException
```
    Empties this Statement object's current list of SQL commands.
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement or the driver does not support batch updates
    
    从以下版本开始:
    
    1.2
    
    另请参阅:
    
    addBatch(java.lang.String), DatabaseMetaData.supportsBatchUpdates()
  - executeBatch
```
int[] executeBatch()
            throws SQLException
```
    Submits a batch of commands to the database for execution and if all commands execute successfully, returns an array of update counts. The int elements of the array that is returned are ordered to correspond to the commands in the batch, which are ordered according to the order in which they were added to the batch. The elements in the array returned by the method executeBatch may be one of the following:
    1. A number greater than or equal to zero -- indicates that the command was processed successfully and is an update count giving the number of rows in the database that were affected by the command's execution
    2. A value of SUCCESS_NO_INFO -- indicates that the command was processed successfully but that the number of rows affected is unknown
      If one of the commands in a batch update fails to execute properly, this method throws a BatchUpdateException, and a JDBC driver may or may not continue to process the remaining commands in the batch. However, the driver's behavior must be consistent with a particular DBMS, either always continuing to process commands or never continuing to process commands. If the driver continues processing after a failure, the array returned by the method BatchUpdateException.getUpdateCounts will contain as many elements as there are commands in the batch, and at least one of the elements will be the following:
    3. A value of EXECUTE_FAILED -- indicates that the command failed to execute successfully and occurs only if a driver continues to process commands after a command fails
    The possible implementations and return values have been modified in the Java 2 SDK, Standard Edition, version 1.3 to accommodate the option of continuing to process commands in a batch update after a BatchUpdateException object has been thrown.
    返回:
    
    an array of update counts containing one element for each command in the batch. The elements of the array are ordered according to the order in which commands were added to the batch.
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement or the driver does not support batch statements. Throws BatchUpdateException (a subclass of SQLException) if one of the commands sent to the database fails to execute properly or attempts to return a result set.
    
    SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement
    
    从以下版本开始:
    
    1.2
    
    另请参阅:
    
    addBatch(java.lang.String), DatabaseMetaData.supportsBatchUpdates()
  - getConnection
```
Connection getConnection()
                  throws SQLException
```
    Retrieves the Connection object that produced this Statement object.
    
    返回:
    
    the connection that produced this statement
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    从以下版本开始:
    
    1.2
  - getMoreResults
```
boolean getMoreResults(int current)
                throws SQLException
```
    Moves to this Statement object's next result, deals with any current ResultSet object(s) according to the instructions specified by the given flag, and returns true if the next result is a ResultSet object.
    There are no more results when the following is true:
```
     // stmt is a Statement object
     ((stmt.getMoreResults(current) == false) && (stmt.getUpdateCount() == -1))
 
```
    参数:
    
    current - one of the following Statement constants indicating what should happen to current ResultSet objects obtained using the method getResultSet: Statement.CLOSE_CURRENT_RESULT, Statement.KEEP_CURRENT_RESULT, or Statement.CLOSE_ALL_RESULTS
    
    返回:
    
    true if the next result is a ResultSet object; false if it is an update count or there are no more results
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement or the argument supplied is not one of the following: Statement.CLOSE_CURRENT_RESULT, Statement.KEEP_CURRENT_RESULT or Statement.CLOSE_ALL_RESULTS
    
    SQLFeatureNotSupportedException - if DatabaseMetaData.supportsMultipleOpenResults returns false and either Statement.KEEP_CURRENT_RESULT or Statement.CLOSE_ALL_RESULTS are supplied as the argument.
    
    从以下版本开始:
    
    1.4
    
    另请参阅:
    
    execute(java.lang.String)
  - getGeneratedKeys
```
ResultSet getGeneratedKeys()
                    throws SQLException
```
    Retrieves any auto-generated keys created as a result of executing this Statement object. If this Statement object did not generate any keys, an empty ResultSet object is returned.
    Note:If the columns which represent the auto-generated keys were not specified, the JDBC driver implementation will determine the columns which best represent the auto-generated keys.
    
    返回:
    
    a ResultSet object containing the auto-generated key(s) generated by the execution of this Statement object
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    SQLFeatureNotSupportedException - if the JDBC driver does not support this method
    
    从以下版本开始:
    
    1.4
  - executeUpdate
```
int executeUpdate(String sql,
                  int autoGeneratedKeys)
           throws SQLException
```
    Executes the given SQL statement and signals the driver with the given flag about whether the auto-generated keys produced by this Statement object should be made available for retrieval. The driver will ignore the flag if the SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).
    Note:This method cannot be called on a PreparedStatement or CallableStatement.
    
    参数:
    
    sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.
    
    autoGeneratedKeys - a flag indicating whether auto-generated keys should be made available for retrieval; one of the following constants: Statement.RETURN_GENERATED_KEYS Statement.NO_GENERATED_KEYS
    
    返回:
    
    either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements that return nothing
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement, the given SQL statement returns a ResultSet object, the given constant is not one of those allowed, the method is called on a PreparedStatement or CallableStatement
    
    SQLFeatureNotSupportedException - if the JDBC driver does not support this method with a constant of Statement.RETURN_GENERATED_KEYS
    
    SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement
    
    从以下版本开始:
    
    1.4
  - executeUpdate
```
int executeUpdate(String sql,
                  int[] columnIndexes)
           throws SQLException
```
    Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. This array contains the indexes of the columns in the target table that contain the auto-generated keys that should be made available. The driver will ignore the array if the SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).
    Note:This method cannot be called on a PreparedStatement or CallableStatement.
    
    参数:
    
    sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.
    
    columnIndexes - an array of column indexes indicating the columns that should be returned from the inserted row
    
    返回:
    
    either (1) the row count for SQL Data Manipulation Language (DML) statements or (2) 0 for SQL statements that return nothing
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement, the SQL statement returns a ResultSet object,the second argument supplied to this method is not an int array whose elements are valid column indexes, the method is called on a PreparedStatement or CallableStatement
    
    SQLFeatureNotSupportedException - if the JDBC driver does not support this method
    
    SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement
    
    从以下版本开始:
    
    1.4
  - executeUpdate
```
int executeUpdate(String sql,
                  String[] columnNames)
           throws SQLException
```
    Executes the given SQL statement and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. This array contains the names of the columns in the target table that contain the auto-generated keys that should be made available. The driver will ignore the array if the SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).
    Note:This method cannot be called on a PreparedStatement or CallableStatement.
    
    参数:
    
    sql - an SQL Data Manipulation Language (DML) statement, such as INSERT, UPDATE or DELETE; or an SQL statement that returns nothing, such as a DDL statement.
    
    columnNames - an array of the names of the columns that should be returned from the inserted row
    
    返回:
    
    either the row count for INSERT, UPDATE, or DELETE statements, or 0 for SQL statements that return nothing
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement, the SQL statement returns a ResultSet object, the second argument supplied to this method is not a String array whose elements are valid column names, the method is called on a PreparedStatement or CallableStatement
    
    SQLFeatureNotSupportedException - if the JDBC driver does not support this method
    
    SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement
    
    从以下版本开始:
    
    1.4
  - execute
```
boolean execute(String sql,
                int autoGeneratedKeys)
         throws SQLException
```
    Executes the given SQL statement, which may return multiple results, and signals the driver that any auto-generated keys should be made available for retrieval. The driver will ignore this signal if the SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).
    In some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.
    The execute method executes an SQL statement and indicates the form of the first result. You must then use the methods getResultSet or getUpdateCount to retrieve the result, and getMoreResults to move to any subsequent result(s).
    Note:This method cannot be called on a PreparedStatement or CallableStatement.
    
    参数:
    
    sql - any SQL statement
    
    autoGeneratedKeys - a constant indicating whether auto-generated keys should be made available for retrieval using the method getGeneratedKeys; one of the following constants: Statement.RETURN_GENERATED_KEYS or Statement.NO_GENERATED_KEYS
    
    返回:
    
    true if the first result is a ResultSet object; false if it is an update count or there are no results
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement, the second parameter supplied to this method is not Statement.RETURN_GENERATED_KEYS or Statement.NO_GENERATED_KEYS, the method is called on a PreparedStatement or CallableStatement
    
    SQLFeatureNotSupportedException - if the JDBC driver does not support this method with a constant of Statement.RETURN_GENERATED_KEYS
    
    SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement
    
    从以下版本开始:
    
    1.4
    
    另请参阅:
    
    getResultSet(), getUpdateCount(), getMoreResults(), getGeneratedKeys()
  - execute
```
boolean execute(String sql,
                int[] columnIndexes)
         throws SQLException
```
    Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. This array contains the indexes of the columns in the target table that contain the auto-generated keys that should be made available. The driver will ignore the array if the SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).
    Under some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.
    The execute method executes an SQL statement and indicates the form of the first result. You must then use the methods getResultSet or getUpdateCount to retrieve the result, and getMoreResults to move to any subsequent result(s).
    Note:This method cannot be called on a PreparedStatement or CallableStatement.
    
    参数:
    
    sql - any SQL statement
    
    columnIndexes - an array of the indexes of the columns in the inserted row that should be made available for retrieval by a call to the method getGeneratedKeys
    
    返回:
    
    true if the first result is a ResultSet object; false if it is an update count or there are no results
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement, the elements in the int array passed to this method are not valid column indexes, the method is called on a PreparedStatement or CallableStatement
    
    SQLFeatureNotSupportedException - if the JDBC driver does not support this method
    
    SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement
    
    从以下版本开始:
    
    1.4
    
    另请参阅:
    
    getResultSet(), getUpdateCount(), getMoreResults()
  - execute
```
boolean execute(String sql,
                String[] columnNames)
         throws SQLException
```
    Executes the given SQL statement, which may return multiple results, and signals the driver that the auto-generated keys indicated in the given array should be made available for retrieval. This array contains the names of the columns in the target table that contain the auto-generated keys that should be made available. The driver will ignore the array if the SQL statement is not an INSERT statement, or an SQL statement able to return auto-generated keys (the list of such statements is vendor-specific).
    In some (uncommon) situations, a single SQL statement may return multiple result sets and/or update counts. Normally you can ignore this unless you are (1) executing a stored procedure that you know may return multiple results or (2) you are dynamically executing an unknown SQL string.
    The execute method executes an SQL statement and indicates the form of the first result. You must then use the methods getResultSet or getUpdateCount to retrieve the result, and getMoreResults to move to any subsequent result(s).
    Note:This method cannot be called on a PreparedStatement or CallableStatement.
    
    参数:
    
    sql - any SQL statement
    
    columnNames - an array of the names of the columns in the inserted row that should be made available for retrieval by a call to the method getGeneratedKeys
    
    返回:
    
    true if the next result is a ResultSet object; false if it is an update count or there are no more results
    
    抛出:
    
    SQLException - if a database access error occurs, this method is called on a closed Statement,the elements of the String array passed to this method are not valid column names, the method is called on a PreparedStatement or CallableStatement
    
    SQLFeatureNotSupportedException - if the JDBC driver does not support this method
    
    SQLTimeoutException - when the driver has determined that the timeout value that was specified by the setQueryTimeout method has been exceeded and has at least attempted to cancel the currently running Statement
    
    从以下版本开始:
    
    1.4
    
    另请参阅:
    
    getResultSet(), getUpdateCount(), getMoreResults(), getGeneratedKeys()
  - getResultSetHoldability
```
int getResultSetHoldability()
                     throws SQLException
```
    Retrieves the result set holdability for ResultSet objects generated by this Statement object.
    
    返回:
    
    either ResultSet.HOLD_CURSORS_OVER_COMMIT or ResultSet.CLOSE_CURSORS_AT_COMMIT
    
    抛出:
    
    SQLException - if a database access error occurs or this method is called on a closed Statement
    
    从以下版本开始:
    
    1.4
  - isClosed
```
boolean isClosed()
          throws SQLException
```
    Retrieves whether this Statement object has been closed. A Statement is closed if the method close has been called on it, or if it is automatically closed.
    
    返回:
    
    true if this Statement object is closed; false if it is still open
    
    抛出:
    
    SQLException - if a database access error occurs
    
    从以下版本开始:
    
    1.6
  - setPoolable
```
void setPoolable(boolean poolable)
          throws SQLException
```
    Requests that a Statement be pooled or not pooled. The value specified is a hint to the statement pool implementation indicating whether the application wants the statement to be pooled. It is up to the statement pool manager as to whether the hint is used.
    The poolable value of a statement is applicable to both internal statement caches implemented by the driver and external statement caches implemented by application servers and other applications.
    By default, a Statement is not poolable when created, and a PreparedStatement and CallableStatement are poolable when created.
    
    参数:
    
    poolable - requests that the statement be pooled if true and that the statement not be pooled if false
    
    抛出:
    
    SQLException - if this method is called on a closed Statement
    
    从以下版本开始:
    
    1.6
  - isPoolable
```
boolean isPoolable()
            throws SQLException
```
    Returns a value indicating whether the Statement is poolable or not.
    
    返回:
    
    true if the Statement is poolable; false otherwise
    
    抛出:
    
    SQLException - if this method is called on a closed Statement
    
    从以下版本开始:
    
    1.6
    
    另请参阅:
    
    setPoolable(boolean)

接口 Statement

字段概要

方法概要

从接口继承的方法 java.sql.Wrapper

字段详细资料

CLOSE_ALL_RESULTS

CLOSE_CURRENT_RESULT

EXECUTE_FAILED

KEEP_CURRENT_RESULT

NO_GENERATED_KEYS

RETURN_GENERATED_KEYS

SUCCESS_NO_INFO

方法详细资料

executeQuery

executeUpdate

close

getMaxFieldSize

setMaxFieldSize

getMaxRows

setMaxRows

setEscapeProcessing

getQueryTimeout

setQueryTimeout

cancel

getWarnings

clearWarnings

setCursorName

execute

getResultSet

getUpdateCount

getMoreResults

setFetchDirection

getFetchDirection

setFetchSize

getFetchSize

getResultSetConcurrency

getResultSetType

addBatch

clearBatch

executeBatch

getConnection

getMoreResults

getGeneratedKeys

executeUpdate

executeUpdate

executeUpdate

execute

execute

execute

getResultSetHoldability

isClosed

setPoolable

isPoolable