用JavaBean实现数据库的连接和关闭，在jsp页面输出数据库中student表中学生的信息

package com.hanqi.test;
import java.sql.*;
public class XveSheng {
     Connection conn;
     Statement st;
     ResultSet rs;
     
    public Connection getConn() {
        return conn;
    }
    public void setConn(Connection conn) {
        this.conn = conn;
    }
    public Statement getSt() {
        return st;
    }
    public void setSt(Statement st) {
        this.st = st;
    }
    public ResultSet getRs() {
        return rs;
    }
    public void setRs(ResultSet rs) {
        this.rs = rs;
    }
    public void lianjie()
    {
               
        try
        {        
            Class.forName("oracle.jdbc.driver.OracleDriver");
            String strUrl = "jdbc:oracle:thin:@localhost:1521:orcl"    ;
            conn  = DriverManager.getConnection(strUrl, "test", "5211314");        
            System.out.println("连接数据库成功！");
        }
        catch (Exception e)
        {            
            e.printStackTrace();            
        } 
        
    }
    public void guanbi()
    {
        try 
        {
            conn.close();
            st.close();
            rs.close();
        } 
        catch (SQLException e)
        {
            e.printStackTrace();
        }
        
        
    }
    
}

<%@page import="com.hanqi.test.XveSheng"%>
<%@page import="java.sql.*"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>学生信息</title>
</head>
<body>
<div align="center"><font size="20px">学生信息表</font></div>
<table border="1" cellspacing="0" width="80%" align="center" style="text-align: center">
<tr>
<td height="40">学号</td>
<td >姓名</td>
<td >性别</td>
<td >生日</td>
<td>班级</td>
</tr>

<%
try{
     XveSheng xs = new XveSheng();
     xs.lianjie();
     xs.setSt(xs.getConn().createStatement());
     xs.setRs(xs.getSt().executeQuery("select * from student"));
     while(xs.getRs().next())
        {
           
           String sno = xs.getRs().getString(1);          
           String sname = xs.getRs().getString(2);
           String ssex = xs.getRs().getString(3);
           Date sbirthday= xs.getRs().getDate(4);
           String sclass = xs.getRs().getString(5);
        
        
 %>
 <tr>
<td height="40"><%=sno %></td>
<td ><%=sname %></td>
<td ><%=ssex %></td>
<td ><%=sbirthday.toString() %></td>
<td><%=sclass %></td>
</tr>
 

<%
        }
     xs.guanbi();

}
catch(Exception e)
{

}


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

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原文地址：https://www.cnblogs.com/wenwen123/p/5631522.html