转自:http://blog.csdn.net/fafeiboy/article/details/2734889
在与数据库操作时,如果执行多条更新的SQL语句(如:update或insert语句),在执行第一条后如果出现异常或电脑断电,
则后面的SQL语句执行不了,这时候设定我们自己提交SQL语句,不让JDBC自动提交,格式为:
conn.setAutoCommit(false);
执行多条SQL语句;
conn.commit();
//恢复自动提交模式
conn.setAutoCommit(true);
代码示例:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class TestTransaction {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Connection con = null;
Statement stmt = null;
ResultSet rs = null;
PreparedStatement ps = null;
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/mydb", "root", "root");
System.out.println("连接数据库成功!");
stmt = con.createStatement();
// JAVA默认为TRUE,我们自己处理需要设置为FALSE,并且修改为手动提交,才可以调用rollback()函数
con.setAutoCommit(false);
stmt.addBatch("insert into people values(078,'ding','duo')");
stmt.addBatch("insert into people values(30,'nokia','ddd')");
stmt.executeBatch();
// 事务提交
con.commit();
// 设置为自动提交,改为TRUE
con.setAutoCommit(true);
/*
* String sql = "select * from people"; rs = stmt.executeQuery(sql);
* while(rs.next()){ System.out.println(rs.getString("id") + " " +
* rs.getString("name")); }
*/
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException se) {
se.printStackTrace();
try {
// 产生的任何SQL异常都需要进行回滚,并设置为系统默认的提交方式,即为TRUE
if (con != null) {
con.rollback();
con.setAutoCommit(true);
}
} catch (SQLException se1) {
se.printStackTrace();
}
} finally {
try {
if (rs != null) {
rs.close();
rs = null;
}
if (stmt != null) {
stmt.close();
stmt = null;
}
if (con != null) {
con.close();
con = null;
}
} catch (SQLException se) {
se.printStackTrace();
}
}
}
}