MYSQL的搭建
安装中MySQL Sener Instance configuration Wizard界面
选择第三个并使character变为utf-8
1 删除数据库之后在安装必须删除注册文件否则无法安装
2Mysql 数据库的常用命令 及命令的格式。
3navicat for Mysql 软件的应用
2 tomcat的安装预配置 jdbc驱动的使用
localhost：8080打不开---------------------是因为端口号被占用
3Myesclips的配置
最新版的 已经自带tomcat
window---perfence----Myesclips-----servers-----RuntimeEnviroments----add（到这来添加合适的版本）
4 数据库的增删改查
insert。jsp 添加
query.jsp 查询数据库
update.jsp 更新
delete。jsp 删除
5 数据库的乱码
两种方式乱码
1 数据库的格式上传格式是错的 导致相应的乱码
2 未给相宜的 数据库（容器） jsp页面 服务器 添加 统一的编码格式
。
jsp 页面实现数据库简单的增删改查
需求 ：
ID
name
Password
Gender
去实现增删改查
1.创建数据库
mysql>create database school;
mysql>use school
mysql>create table school(
->id int(30) not null primary key,
->name varchar(50),
->password varchar30),
->gender varchar(30),
->);
创建了 库名为school 表名为school
2 新建web 项目
步骤 new - web project-webRoot-新建jsp文件
Index.jsp
此页面是项目起始的界面
<%@ page language="java" import="java.util.*" 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">
<html>
<head>
<base href="<%=basePath%>">
<title>Welcome,home</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body background="pic/1.jpg"><br/><br/>
<center>
<a href="addStuInfo.jsp">点此添加信息</a><br/><br/>//各个页面的链接首个页面
<a href="showInfo.jsp">点此查询信息</a><br/><br/>
<a href="showInfo.jsp">点此修改信息</a><br/><br/>
<a href="showInfo.jsp">点此显示信息</a><br/><br/>
<br>
</center>
</body>
</html>
addStuInfo.Jsp
<%@ page language="java" import="java.util.*" 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">
<html>
<head>
<base href="<%=basePath%>">
<title>输入信息界面</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript"">
function validate() //调用此函数来获取 用户在该页面添加的信息的值
{
var id = document.forms[0].id.value;
var name = document.forms[0].name.value;
var password = document.forms[0].password.value;
if(id <= 0){
alert("学号不能为空，请输入学号！");
return false;
}
else if(name.length <= 0){
alert("姓名不能为空，请输入姓名！");
return false;
}
else if (password.length<= 0){
alert("请输入密码！");
return false;
}
else{
return true;
}
//document.getElementById("form").submit();
}
</script>
</head>
<body background="pic/1.jpg"> //背景图片
<br>
<center>
<h2>添加信息</h2><hr>
//form表单的形式去提交数据 提交按钮使用validate函数去执行获取值的方法
<form action="insert.jsp" method="post" id="form" onSubmit="return validate()" >
<h4> id:<input type="text" name="id" class="{required:true}"></input><br></h4>
<h4> 姓名：<input type="text" name="name"></input><br></h4>
<h4> 密码：<input type="text" name="password"></input><br></h4>
<h4> 性别：<input type="radio" name="gender" value="男">男
<input type="radio" name="gender" value="女">女<br></h4>
<input type="submit" value="提交"/>
</form> // 在这里 去将这4 个数据在以表单的形式去传递信息。
<a href="showInfo.jsp">查询所有信息</a>
</center>
</body>
</html>
showInfo.jsp
1、pageEncoding="UTF-8"的作用是设置JSP编译成Servlet时使用的编码。
2、contentType="text/html;charset=UTF-8"的作用是指定对服务器响应进行重新编码的编码。
3、request.setCharacterEncoding("UTF-8")的作用是设置对客户端请求进行重新编码的编码。
4、response.setCharacterEncoding("UTF-8")的作用是指定对服务器响应进行重新编码的编码。
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>信息表</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body background="pic/1.jpg">
<%
response.setCharacterEncoding("UTF-8"); //对服务器请求重新编码的编码
request.setCharacterEncoding("UTF-8");//对客户端请求进行重新编码的编码
;//是用来获取URL中的参数
String id = request.getParameter("id")
String name = request.getParameter("name");
String password = request.getParameter("password");
String gender = request.getParameter("gender");
Connection conn = null; 声明数据库连接对象
Connection con=null; 声明对象变量，后面指向一个DriverManager.getConnection(url,"root",""); 的对象引用
先定义null ，再指向对象的引用，是因为3楼的代码方式，因为try catch 的原因。
如果 直接将异常抛出的话，那可以直接
Connection con = DriverManager.getConnection(url,"root","");
Statement stat = null;
ResultSet rs = null;
1、这个是jdbc里面的经典语法了
2、通常和Connection 、 Preparedstatement等共同使用
3、首先用ResultSet rs = null；表示定义出这个ResultSet的对象rs
4、可以在后续的使用中来给rs赋值或者其他的操作
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/school";
String user = "root";
String passwords = "123456";
conn = DriverManager.getConnection(url,user,passwords);
stat = conn.createStatement();
传统的使用jdbc来访问数据库的流程为：
Class.forName(“com.mysql.jdbc.Driver”);
String url = “jdbc:mysql://localhost:3306/test?user=root&password=123456″;
Connection con = DriverManager.getConnection(url);
Statement statement = con.createStatement();
rs = stat.executeQuery("select * from school");
数据库命令 查寻在school表中。
%>
<br>
<h2>学生信息</h2> <hr>
<br>
<h3>全部信息如下</h3>
<table width="450" border="100" cellSpacing=3 style="font-size:15pt;border:dashed 1pt">
<tr>
<td>id</td>
<td>姓名</td>
<td>密码</td>
<td>性别</td>
</tr>
<%
//将指针从当前位置下移一行。ResultSet 指针最初位于第一行之前；第一次调用 next 方法使第一行成为当前行；第二次调用使第二行成为当前行，依此类推。 如果如果新的当前行有效，则返回 true；如果不存在下一行，则返回 false
while(rs.next())
{
out.print("<tr>");
out.print("<td>" + rs.getInt("id") + "</td>");
out.print("<td>" + rs.getString("name") + "</td>");
out.print("<td>" + rs.getString("password") + "</td>");
out.print("<td>" + rs.getString("gender") + "</td>");
%>
这 个是执行SQL语句 带参数的写法
value后面的问号就代表你前面字段的值！
<td><a href="delete.jsp?id=<%=rs.getInt("id") %>">删除</a></td> 删除相应id的值
<td><a href="update.jsp?id=<%=rs.getInt("id") %>">修改</a></td>
<%
out.print("</tr>");
}
%>
</table>
<br>
Form表单对id来进行查找。
<form action="select_for_id.jsp" method="post">
<h3>按id查询:<input type="text" name="id" value="" title="id不能为空" ></input>
<input type="submit" value="查询"/></h3>
<br>
</form>
Form表单对姓命来进行查找。
<form action="select_for_name.jsp" method="post">
<h3>按姓名查询:<input type="text" name="name" value="" title="姓名不能为空"></input>
<input type="submit" value="查询" /></h3>
<br>
</form>
Form表单对性别来进行查找。
<form action="select_for_gender.jsp" method="post">
<h3> 按性别查询:<input type="text" name="gender" value="" title="性别不能为空"></input>
<input type="submit" value="查询"/></h3>
<br>
</form>
<br>
<h3><a href=addInfo.jsp>返回添加信息页面</a></h3>
<br>
<%
if(rs != null)
{
rs.close();
rs = null;
}
if(stat != null)
{
stat.close();
stat = null;
}
if(conn != null)
{
conn.close(); //这里如果conn没有 赋值为空 则会编译报错
conn = null;
}
%>
</body>
</html>
Delete.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>删除页面</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body background="pic/1.jpg">
<%
request.setCharacterEncoding("UTF-8"); 请求是客户端的重新编码
String id = request.getParameter("id");
//通过id对数据进行删除。在这里获取url的参数
Connection conn = null;
Statement stat = null;
ResultSet rs = null;
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/school"; //数据库的名字
String user = "root"; //用户的名字
String passwords = "123456"; //用户的密码
conn = DriverManager.getConnection(url,user,passwords);
stat = conn.createStatement();
stat.executeUpdate("delete from school where id = " + id + "");
更改用id从数据库中 删除
rs = stat.executeQuery("select * from school");
查寻的数据库命令
if(rs.next())
{
out.print("<center><br><br><h3>删除成功！</h3></center>");
}
else{
out.print("<center><h3>删除失败！</h3></center>");
}
%>
<br>
<br>
<center> <a href=addInfo.jsp>返回添加信息页面</a> <a href=showInfo.jsp>返回信息查询页面</a></center>
<%
if(rs != null)
{
rs.close();
rs = null;
}
if(stat != null)
{
stat.close();
stat = null;
}
if(conn != null)
{
conn.close();
conn = null;
}
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
Update.jsp
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>学生信息</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
<script type="text/javascript"">
function validate()
{
var id = document.forms[0].id.value;
var name = document.forms[0].name.value;
var password = document.forms[0].password.value;
if(id <= 0){
alert("学号不能为空，请输入学号！");
return false;
}
else if(name.length <= 0){
alert("姓名不能为空，请输入姓名！");
return false;
}
else if(password.length<= 0){
alert("密码不能为空");
return false;
}
else{
return true;
}
//document.getElementById("form").submit();
}
</script>
</head>
<body background="1.jpg">
<%
response.setCharacterEncoding("UTF-8");
request.setCharacterEncoding("UTF-8");
String id = request.getParameter("id");
Connection conn = null;
Statement stat = null;
ResultSet rs = null;
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/school";
String user = "root";
String passwords = "123456";
conn = DriverManager.getConnection(url,user,passwords);
stat = conn.createStatement();
rs = stat.executeQuery("select * from school where id=" + id + "");
更新修改也用id 去实现
%>
<br>
<h2>学生信息</h2> <hr>
<br>
<h3>要修改的学生信息如下</h3>
<table width="450" border="100" cellSpacing=1 style="font-size:15pt;border:dashed 1pt">
<tr>
<td>id</td>
<td>姓名</td>
<td>密码</td>
<td>性别</td>
</tr>
<%
while(rs.next())
{
out.print("<tr>");
out.print("<td>" + rs.getInt("id") + "</td>");
out.print("<td>" + rs.getString("name") + "</td>");
out.print("<td>" + rs.getString("password") + "</td>");
out.print("<td>" + rs.getString("gender") + "</td>");
out.print("</tr>");
%>
</table>
<br>
<br>
<h3>将学生信息更改为：</h3>
<form action="updateShow.jsp" method="post" onSubmit="return validate()">
<h4> id：<input type="text" name="id" value="<%=rs.getInt("id") %>" title="id不能改变" readonly="readonly"></input><br></h4>
<h4> 姓名：<input type="text" name="name" title="姓名不能为空" onclick="return checkName(name)"></input><br></h4>
<h4> 密码：<input type="text" name="password" title="密码不能为空"></input><br></h4>
<h4> 性别：<input type="radio" name="gender" value="男">男
<input type="radio" name="gender" value="女">女<br></h4>
<input type="submit" value="修改"/>
</form>
<br>
<h3><a href=addInfo.jsp>返回添加信息页面</a></h3>
<h3><a href=showInfo.jsp>返回信息查询页面</a></h3>
<%
}
%>
<%
if(rs != null)
{
rs.close();
rs = null;
}
if(stat != null)
{
stat.close();
stat = null;
}
if(conn != null)
{
conn.close();
conn = null;
}
%>
</body>
</html>
updateShow.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>修改页面</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body background="1.jpg">
<%
request.setCharacterEncoding("UTF-8");
String id1 = request.getParameter("id");
String name1 = request.getParameter("name");
String password1 = request.getParameter("password");
String gender1 = request.getParameter("gender");
Connection conn = null;
Statement stat = null;
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/school";
String user = "root";
String passwords = "123456";
conn = DriverManager.getConnection(url,user,passwords);
stat = conn.createStatement();
stat.execute("update school set id=" + id1 + ",name='" + name1 + "',password='" + password1+ "',gender='" + gender1 + "' where id=" + id1 + "");
ResultSet rs = stat.executeQuery("select * from school where id=" + id1 + "");
传输给服务器的格式很重要 (“update school set id=”+id1+ “”,name=’ ”+name1+””);
%>
<br>
<h3>修改成功！</h3>
<br>
<h3>修改后的信息为：</h3>
<hr>
<br>
<br>
<table width="450" border="100" cellSpacing=1 style="font-size:15pt;border:dashed 1pt">
<tr>
<td>id</td>
<td>姓名</td>
<td>密码</td>
<td>性别</td>
</tr>
<%
while(rs.next())
{
out.print("<tr>");
out.print("<td>" + rs.getInt("id") + "</td>");
out.print("<td>" + rs.getString("name") + "</td>");
out.print("<td>" + rs.getString("password") + "</td>");
out.print("<td>" + rs.getString("gender") + "</td>");
out.print("</tr>");
}
%>
</table>
<br>
<br>
<h3><a href=addInfo.jsp>返回添加信息页面</a></h3>
<h3><a href=showInfo.jsp>返回信息查询页面</a></h3>
<%
if(rs != null)
{
rs.close();
rs = null;
}
if(stat != null)
{
stat.close();
stat = null;
}
if(conn != null)
{
conn.close();
conn = null;
}
%>
</body>
</html>
select_for_gender.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>按性别查询</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body background="pic/1.jpg">
<%
request.setCharacterEncoding("UTF-8");
String gender = request.getParameter("gender");
Connection conn = null;
Statement stat = null;
ResultSet rs = null;
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/school";
String user = "root";
String passwords = "123456";
conn = DriverManager.getConnection(url,user,passwords);
stat = conn.createStatement();
rs = stat.executeQuery("select * from school where gender='" + gender + "'");
//("select * from school where gender='" + gender + "'")经典的一句即
（“select *from school where gender=‘“+gender+”’ “）
%>
<br>
<h3>符合条件的信息</h3><hr>
<br>
<table width="450" border="100" cellSpacing=1 style="font-size:15pt;border:dashed 1pt">
<tr>
<td>id</td>
<td>姓名</td>
<td>密码</td>
<td>性别</td>
</tr>
<%
while(rs.next())
{
out.print("<tr>");
out.print("<td>" + rs.getInt("id") + "</td>");
out.print("<td>" + rs.getString("name") + "</td>");
out.print("<td>" + rs.getString("password") + "</td>");
out.print("<td>" + rs.getString("gender") + "</td>");
%>
<td><a href="delete.jsp?id=<%=rs.getInt("id") %>">删除</a></td>
<td><a href="update.jsp?id=<%=rs.getInt("id") %>">修改</a></td>
<%
out.print("</tr>");
}
%>
</table>
<br>
<br>
<h4><a href=showInfo.jsp>返回查询页面</a></h4>
<%
if(rs != null)
{
rs.close();
rs = null;
}
if(stat != null)
{
stat.close();
stat = null;
}
if(conn != null)
{
conn.close();
conn = null;
}
%>
</body>
</html>
select_for_id.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>按id查询</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body background="pic/1.jpg">
<%
request.setCharacterEncoding("UTF-8");
String id = request.getParameter("id");
Connection conn = null;
Statement stat = null;
ResultSet rs = null;
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/school";
String user = "root";
String passwords = "123456";
conn = DriverManager.getConnection(url,user,passwords);
stat = conn.createStatement();
rs = stat.executeQuery("select * from school where id=" + id + ""); //这是 表名
%>
<br>
<h3>符合条件的学生信息</h3><hr>
<br>
<table width="450" border="100" cellSpacing=1 style="font-size:15pt;border:dashed 1pt">
<tr>
<td>id</td>
<td>姓名</td>
<td>密码</td>
<td>性别</td>
</tr>
<%
if(rs.next())
{
out.print("<tr>");
out.print("<td>" + rs.getInt("id") + "</td>");
out.print("<td>" + rs.getString("name") + "</td>");
out.print("<td>" + rs.getString("password") + "</td>");
out.print("<td>" + rs.getString("gender") + "</td>");
%>
<td><a href="delete.jsp?id=<%=rs.getInt("id") %>">删除</a></td>
<td><a href="update.jsp?id=<%=rs.getInt("id") %>">修改</a></td>
<%
out.print("</tr>");
}
else{
out.print("<h4>不存在此条件的信息！</h4>");
}
%>
</table>
<br>
<br>
<h4><a href=showInfo.jsp>返回查询页面</a></h4>
<%
if(rs != null)
{
rs.close();
rs = null;
}
if(stat != null)
{
stat.close();
stat = null;
}
if(conn != null)
{
conn.close();
conn = null;
}
%>
</body>
</html>
select_for_name.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>按姓名查询</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body background="pic/1.jpg">
<%
request.setCharacterEncoding("UTF-8");
String name = request.getParameter("name");
Connection conn = null;
Statement stat = null;
ResultSet rs = null;
Class.forName("com.mysql.jdbc.Driver");
String url="jdbc:mysql://localhost:3306/school";
String user = "root";
String passwords= "123456";
conn = DriverManager.getConnection(url,user,passwords);
stat = conn.createStatement();
rs = stat.executeQuery("select * from school where name='" + name + "'");
%>
<br>
<h3>符合条件的学生信息</h3><hr>
<br>
<table width="450" border="100" cellSpacing=1 style="font-size:15pt;border:dashed 1pt">
<tr>
<td>id</td>
<td>姓名</td>
<td>密码</td>
<td>性别</td>
</tr>
<%
while(rs.next())
{
out.print("<tr>");
out.print("<td>" + rs.getInt("id") + "</td>");
out.print("<td>" + rs.getString("name") + "</td>");
out.print("<td>" + rs.getString("password") + "</td>");
out.print("<td>" + rs.getString("gender") + "</td>");
%>
<td><a href="delete.jsp?id=<%=rs.getInt("id") %>">删除</a></td>
<td><a href="update.jsp?id=<%=rs.getInt("id") %>">修改</a></td>
<%
out.print("</tr>");
}
%>
</table>
<br>
<br>
<h4><a href=showInfo.jsp>返回查询页面</a></h4>
<%
if(rs != null)
{
rs.close();
rs = null;
}
if(stat != null)
{
stat.close();
stat = null;
}
if(conn != null)
{
conn.close();
conn = null;
}
%>
</body>
</html>
Insert.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ page import="java.sql.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>插入信息</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body background="pic/1.jpg">
<%
request.setCharacterEncoding("UTF-8");
String id = request.getParameter("id");
String name = request.getParameter("name");
System.out.println(name);
String password = request.getParameter("password");
String gender = request.getParameter("gender");
Connection conn = null;
Statement stat = null;
ResultSet rs = null;
Class.forName("com.mysql.jdbc.Driver");
String url = "jdbc:mysql://localhost:3306/school"; //数据库名
String user = "root";
String passwords = "123456";
conn = DriverManager.getConnection(url, user, passwords);
stat = conn.createStatement();
String sql = "insert into school(id,name,password,gender) values(" + id + ",'" + name + "','" + password + "','" + gender + "')";
在这里添加信息int型的跟String型的不是同样的格式。
stat.executeUpdate(sql);
rs = stat.executeQuery("select * from school");
%>
<center>
<%
if(rs.next())
{
out.print("<br><h3>成功输入！</h3>");
}
else{
out.print("<br><h3>输入失败！</h3>");
}
%>
<br>
<a href=addInfo.jsp>返回添加信息页面</a> <a href=showInfo.jsp>进入信息查询页面</a> <a href=index.jsp>返回起始页面</a>
</center>
<%
if(rs != null)
{
rs.close();
rs = null;
}
if(stat != null)
{
stat.close();
stat = null;
}
if(conn != null)
{
conn.close();
conn = null;
}
%>
</body>
</html>