java基础之JDBC四：事务简单示例

/**
 * 事务
 */
public class Test {
    public static void main(String[] args) {
        Connection conn = null;
        PreparedStatement ps = null;
        try {
            //直接用上一篇文章内写好的工具类创建conn
            conn = JDBCSimpleUtils.getConnection();
            String sql1 = "UPDATE users SET psw = ? WHERE uid = ? ;";
            String sql2 = "INSERT INTO users VALUES(NULL,?,?);";
            //开启事务
            conn.setAutoCommit(false);
            ps = conn.prepareStatement(sql1);
            ps.setString(1, "123");
            ps.setInt(2, 1);
            int u = ps.executeUpdate();
            ps = conn.prepareStatement(sql2);
            ps.setString(1, "孙燕姿");
            ps.setString(2, "123");
            int i = ps.executeUpdate();
            if (i > 0 && u > 0) {
                conn.commit();
                ;
                System.out.println("ok");
            } else {
                conn.rollback();
                System.out.println("error");
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            JDBCSimpleUtils.release(conn, ps);
        }
    }
}