useexecuteupdate.java

jsp 应用开发技术光盘 是《jsp应用开发技术》这本书的源代码

package ch13;

import java.sql.*;

public class UseExecuteUpdate {
	public static void main(String[] args) {
		String url = "jdbc:mysql://localhost/sql_test";
		String userName = "root";
		String password = "root";
		String sql = null;
		Connection conn = null;
		Statement stmt = null;
		try {
			Class.forName("com.mysql.jdbc.Driver");
		} catch(ClassNotFoundException e) {
			System.out.println("加载驱动器类时出现异常");
		}
		
		try {
			conn = DriverManager.getConnection(url, userName, password);
			
			//创建Statement语句
			stmt = conn.createStatement();			
			sql = "DELETE FROM student WHERE stu_id='13'";
			
			//使用executeUpdate执行更新语句
			int affectedRowCount = stmt.executeUpdate(sql);
			System.out.println("删除操作影响的数据行数为：" + affectedRowCount);
			
			//使用executeUpdate执行更新语句
			sql = "INSERT INTO student " +
			      "VALUES('13', 'wang', 'beijing', '1980-05-01')";
			affectedRowCount = stmt.executeUpdate(sql);
			System.out.println("插入操作影响的数据行数为：" + affectedRowCount);
			
			stmt.close();
			
		} catch(SQLException e) {
			System.out.println("出现SQLException异常");
		} finally {
			//关闭语句和数据库连接
			try {
				if (conn != null) conn.close();
			} catch(SQLException e) {
				System.out.println("关闭数据库连接时出现异常");
			}		
		}
		
	}
}