在数据库中执行一个批处理SQL语句

在数据库中执行一个批处理SQL语句
With batch updating, a set of SQL statements is assembled and then sent altogether to the database for execution. Batch updating can improve performance.
This example creates a batch of insert statements. Auto-commit is disabled so that you have the choice of committing or not in the event of an exception.

java 代码

try {    
    // Disable auto-commit    
    connection.setAutoCommit(false);    
   
    // Create a prepared statement    
    String sql = "INSERT INTO my_table VALUES(?)";    
    PreparedStatement pstmt = connection.prepareStatement(sql);    
   
    // Insert 10 rows of data    
    for (int i=0; i<10; i++) {    
        pstmt.setString(1, ""+i);    
        pstmt.addBatch();    
    }    
   
    // Execute the batch    
    int [] updateCounts = pstmt.executeBatch();    
   
    // All statements were successfully executed.    
    // updateCounts contains one element for each batched statement.    
    // updateCounts[i] contains the number of rows affected by that statement.    
    processUpdateCounts(updateCounts);    
   
    // Since there were no errors, commit    
    connection.commit();    
} catch (BatchUpdateException e) {    
    // Not all of the statements were successfully executed    
    int[] updateCounts = e.getUpdateCounts();    
   
    // Some databases will continue to execute after one fails.    
    // If so, updateCounts.length will equal the number of batched statements.    
    // If not, updateCounts.length will equal the number of successfully executed statements    
    processUpdateCounts(updateCounts);    
   
    // Either commit the successfully executed statements or rollback the entire batch    
    connection.rollback();    
} catch (SQLException e) {    
}    
   
public static void processUpdateCounts(int[] updateCounts) {    
    for (int i=0; i<updateCounts.length; i++) {    
        if (updateCounts[i] >= 0) {    
            // Successfully executed; the number represents number of affected rows    
        } else if (updateCounts[i] == Statement.SUCCESS_NO_INFO) {    
            // Successfully executed; number of affected rows not available    
        } else if (updateCounts[i] == Statement.EXECUTE_FAILED) {    
            // Failed to execute    
        }    
    }    
}