[TOC]
# 用户注册实例
**代码片段：**
reg.jsp
~~~
<%@ 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>Insert title here</title>
</head>
<body>
<form action="regService.jsp" method="post">
用户名：<input type="text" name="username" value=""/><br/>
密码：<input type="password" name="password" value=""/><br/>
<input type="submit" value="注册" />
</form>
</body>
</html>
~~~
regService.jsp
~~~
<%@ 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>Insert title here</title>
</head>
<body>
<%
String username = request.getParameter("username");
String password = request.getParameter("password");
boolean usernameCheck = null != username && username.trim().length() > 6;
boolean passwordCheck = null != password && password.trim().length() > 6;
if (usernameCheck && passwordCheck) {
// 往数据库插入数据
%>
<jsp:forward page="regSuccess.jsp"></jsp:forward>
<%
} else {
%>
<jsp:forward page="regError.jsp"></jsp:forward>
<%
}
%>
</body>
</html>
~~~
regSuccess.jsp
~~~
<%@ 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>Insert title here</title>
</head>
<body>
<h1>恭喜你，注册成功！</h1>
<!-- 把所有的注册用户信息全部都显示出来 -->
</body>
</html>
~~~
regError.jsp
~~~
<%@ 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>Insert title here</title>
</head>
<body>
<h1>用户名或者密码不符合要求，<a href="reg.jsp">点击重新注册</a></h1>
</body>
</html>
~~~
