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JSP--TOMCAT-MYSQL web页面查询

2024-07-05 23:12:06   228人阅读

queryStudent.jsp代码如下

<%@ page language="java" contentType="text/html; charset=gb2312"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>queryStudentinfo</title>
</head>
<body>
      <table style="border-right:#89d4f8 1px solid; 
      border-top:#89d4f8 1px solid; 
      border-left:#89d4f8 1px solid"
      cellSpacing=0 cellpadding=70 align=center bgColor=#ffffff border=0>
      <tbody>
          <tr>
            <td height=26>&nbsp;&nbsp;添加学生信息</td>           
          </tr>
          <tr>
             <td height=1 bgColor=#89d4f8> </td>
          </tr>   
      </tbody>
      </table>
      <!-- 点击按钮查询 -->
      <form name=messages method="post" action="after_queryStudent.jsp">
        <table width="100" align="center" border="0">
         <tr>
             <td width="67"></td>
             <td><input type="submit" value=http://www.mamicode.com/"查询所有学生信息"></td>
         </tr>
        </table>
      
      
      </form>
</body>
</html>

after_queryStudent.jsp页面代码

<%@ page language="java" 
import="java.util.*" 
import="com.mysql.jdbc.Driver" 
import="java.sql.*" 
contentType="text/html;charset=gb2312" 
pageEncoding="UTF-8"%>
<%
   String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>after_queryStudent</title>
</head>
<body>
<%
  Connection conn;
  Statement stat;
   //设置连接的url，其中student是数据库名称
       String url="jdbc:mysql://localhost:3306/student";
       //我使用的是免安装版的mysql,用户:root,密码：zhangweijie
       String userName="root";
       String password="zhangweijie";
         try{
          //注册JDBC驱动程序
          Class.forName("com.mysql.jdbc.Driver");
       }
       catch(ClassNotFoundException ex)
       {
              out.println("找不到驱动程序！");      
       }
       //打开数据库连接
       conn=DriverManager.getConnection(url,userName,password);
       try{
           stat=conn.createStatement();
           //如果存在同名的数据表，先进行删除
           ResultSet result=stat.executeQuery("select * from Student_Info;");
           //绘制一张表格，用来显示数据
           out.println("<table border>");
           out.println("<tr><td colspan=3 align=center>学生信息</td></tr>");
           out.println("<tr>");
           out.println("<td width=150>学号 </td>");
           out.println("<td width=150>姓名 </td>");  
           out.println("<td width=150>联系电话  </td>");  
           out.println("</tr>");
           while(result.next()){
            //读取查询结果，并显示
              out.println("<tr>");
              out.println("<td>"+result.getInt(1)+"</td>");
              out.println("<td>"+result.getString(2)+"</td>");  
              out.println("<td>"+result.getString(3)+"</td>");  
              out.println("</tr>");
           
           }
           
           
        }
        catch(SQLException ex)
        {
           out.println("数据表操作失败!");
        }
        finally{
        
            conn.close();
        }
 %>
</body>
</html>

 


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