Red Hat Enterprise linux 7与linxu6命令的变化，运行级别，多ip网卡配置，nmtui功能的使用及说明

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
}
}
}