• 通过JDBC连接数据库(MySql为例)并读取数据库信息--JSP基础


    1、先建数据库,数据库名为:employee_DB;然后在数据库employee_DB下建表,表名为employee;最后插入数据。

    create database employee_DB;

    use employee_DB;

     

    create table employee(
    id int primary key auto_increment,
    name varchar(50),
    age int,
    sex varchar(2),
    salary float,
    department varchar(50)
    );

    desc employee;

     insert into employee values(1,'张雨',20,'女',3600,'后勤部');

     insert into employee values(2,'刘冰',22,'男',4500,'人事');

     insert into employee values(3,'张雨',25,'男',5000,'技术部');

    select * from employee;

    2、index.jsp页面:

     1 <%@page import="java.sql.ResultSet"%>
     2 <%@page import="java.sql.Statement"%>
     3 <%@page import="java.sql.Connection"%>
     4 <%@page import="java.sql.DriverManager"%>
     5 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
     6 <%
     7 String path = request.getContextPath();
     8 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
     9 %>
    10 
    11 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
    12 <html>
    13   <head>
    14     <base href="<%=basePath%>">
    15     
    16     <title>My JSP 'index.jsp' starting page</title>
    17     <meta http-equiv="pragma" content="no-cache">
    18     <meta http-equiv="cache-control" content="no-cache">
    19     <meta http-equiv="expires" content="0">    
    20     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    21     <meta http-equiv="description" content="This is my page">
    22     
    23   </head>
    24   
    25   <body>
    26     <%
    27     try{
    28          Class.forName("com.mysql.jdbc.Driver");
    29          //out.print("加载驱动成功……");
    30     }catch(ClassNotFoundException e){
    31         //out.print("加载驱动出现异常!");
    32         //out.print(e);在浏览器下输出异常
    33         e.printStackTrace();
    34     }
    35     String url="jdbc:mysql://localhost:3306/employee_db";
    36     String username="root";
    37     String password="123456";
    38     Connection conn=DriverManager.getConnection(url, username, password);
    39     /*
    40     if(conn!=null){
    41         out.print("数据库连接成功!");
    42         conn.close();
    43     }else{
    44         out.print("数据库连接失败!");
    45     }
    46     
    47     */
    48     Statement stmt=conn.createStatement();
    49     String sql="select * from employee";
    50     ResultSet rs=stmt.executeQuery(sql);
    51     %>
    52     <%
    53       %>
    54       <table border=2>
    55           <tr>
    56           <th>员工号</th>
    57           <th>姓名</th>
    58           <th>年龄</th>
    59           <th>性别</th>
    60           <th>薪水</th>
    61           <th>部门</th>
    62           </tr>
    63    <%
    64    while(rs.next()){
    65            out.print("<tr>");
    66            out.print("<td>"+rs.getInt("id")+"</td>");
    67               out.print("<td>"+rs.getString("name")+"</td>");
    68           out.print("<td>"+rs.getString("age")+"</td>");
    69           out.print("<td>"+rs.getString("sex")+"</td>");
    70           out.print("<td>"+rs.getFloat("salary")+"</td>");
    71           out.print("<td>"+rs.getString("department")+"</td>");
    72           out.print("</tr>");
    73    }
    74    out.print("</table>");
    75    rs.close();
    76    stmt.close();
    77    conn.close();
    78     %>
    79   </body>
    80 </html>

    3、Effect Picture:

    源码文件:jsp连接Mysql以及显示数据库信息.zip

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  • 原文地址:https://www.cnblogs.com/qikeyishu/p/7777885.html
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