JSP 操作Mysql数据库

首先在src目录下建立包UTIL,在包中创建类MysqlConnect，该类实现了一个操作数据库的JavaBean
代码如下:

package UTIL;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;


public class MysqlConnect {
	private Statement stmt=null;
	private Connection conn=null;
	ResultSet rs=null;
	public  MysqlConnect() {
		// TODO 自动生成的构造函数存根
	}
	public void openConnection() throws Exception{
		try {
			 Class.forName("com.mysql.jdbc.Driver");
		     String url="jdbc:mysql://127.0.0.1:3306/hengx?useSSL=false";
			 String user="root";
			 String password="123456";
			 conn = DriverManager.getConnection(url, user,password);
		}catch (SQLException e) {
			// TODO: handle exception
			System.err.println("Data.executeQuery："+e.getMessage());
		}
	}
	public ResultSet executeQuery(String sql) {
		rs=null;
		try {
			stmt=conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
			rs=stmt.executeQuery(sql);
		} catch (SQLException e) {
			// TODO: handle exception
			System.err.println("Data.executeQuery："+e.getMessage());
		}
		return rs;
		
	}
	public void closeStmt() {
		try {
			stmt.close();
		} catch (SQLException e) {
			// TODO: handle exception
			System.err.println("Data.executeQuery："+e.getMessage());
		}
	}
	public void closeConn() {
		try {
			conn.close();
		} catch (SQLException e) {
			// TODO: handle exception
			System.err.println("Data.executeQuery："+e.getMessage());
		}
	}

}

编写jsp程序,命名为Mysql.jsp
代码如下:

<%@page import="java.sql.ResultSet"%>
<%@page import="com.sun.corba.se.spi.orbutil.fsm.Guard.Result"%>
<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ page import="java.sql.*" %>
<jsp:useBean id="MysqlBean" class="UTIL.MysqlConnect" scope="page"/>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>链接数据库</title>
<style type="text/css">
<!--
.style1{
color:#ff0000;
font-size:24px;
}
-->

</style>
</head>
<body>
<div align="center">
<span class="style1">JDBC连接MYSQL数据库</span><br><br><br>
</div>
<table border="2" bgcolor="#ffcccc" align="center">
<tr bgcolor="#cccccc" align="center">
<td>姓名</td>
<td>性别</td>
<td>电话</td>
</tr>
<%
String sql="select * from imooc_goddess";
MysqlBean.openConnection();
ResultSet rs=MysqlBean.executeQuery(sql);
while(rs.next()){
%>
<tr>
<td><%=rs.getString("user_name") %></td>
<td><%=rs.getString("sex") %></td>
<td><%=rs.getString("mobile") %></td>
</tr>

<%} %>
<%
out.print("数据库操作成功，恭喜你！");
rs.close();
MysqlBean.closeConn();
MysqlBean.closeStmt();

%>
</table>
</body>
</html>

数据库如下:

最后结果如图:

JSP 操作Mysql数据库

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