JavaBean .
（1）
编写 JavaBean
<%@ 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 methord="post" action="exelogin.jsp">
用户名<input name="username" type="text" >
密码<input name="password" type="password" >
<input type="submit" value="登录">
<input type="reset" value="重置">
</form>
</body>
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 methord="post" action="exelogin.jsp">
用户名<input name="username" type="text" >
密码<input name="password" type="password" >
<input type="submit" value="登录">
<input type="reset" value="重置">
</form>
</body>
</html>