建一個web工程demo2，創建兩個類包：com.csdn.Controller下包含的 Servlet文件ActionServlet.java和JspResultServlet.java,com.csdn.model下包含的java類有User.java,Web-Root下建有userRegister.html，各個文件內容如下：
userRegister.html代碼：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>userRegister.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
</head>
<body>
<h1>請填寫註冊信息</h1>
<form action="/demo2/ActionServlet">
用戶名: <input type="text" name="user"><br/>
郵 箱: <input type="text" name="email"><br/>
<input type="submit" value="提交"/>
</form>
</body>
</html>
JspResultServlet.java代碼:
package com.csdn.Controller;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.csdn.model.User;
public class JspResultServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/thml;charset=utf-8");
PrintWriter out=response.getWriter();
User user=(User)request.getAttribute("user");
if(user !=null)
{
out.println("<h1>你的註冊信息內容：</h1>");
out.println("用戶名:"+user.getName()+"<br>");
out.println("郵 箱:"+user.getEmail()+"<br>");
}
out.close();
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
ActionServlet.java代碼：
package com.csdn.Controller;
import java.io.IOException;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.csdn.model.User;
public class ActionServlet extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String name=request.getParameter("user");
String email=request.getParameter("email");
User user=new User();
user.setName(name);
user.setEmail(email);
request.setAttribute("user",user);
RequestDispatcher rd=request.getRequestDispatcher("JspResultServlet");
rd.forward(request,response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
}
User.java代碼：
package com.csdn.model;
public class User
{
private String name=null;
private String email=null;
public void setName(String name)
{
this.name=name;
}
public void setEmail(String email)
{
this.email=email;
}
public String getName()
{
return this.name;
}
public String getEmail()
{
return this.email;
}
}
部署工程之後，在瀏覽器下輸入：http://localhost:8080/demo2/userRegister.html
頁面顯示：
輸入信息：
點擊提交按鈕後，顯示以下信息：
今天寫作業的收穫：不論多麼困難，不論作業會不會寫，都要自己寫，出錯了一定要自己改，看視頻，問百度，找老師的原代碼，各種方法種種用，勿急勿燥，但要堅持自己改，這樣僅僅會加深你對各個代碼代表的意義的理解，而且會讓你明白爲什麼會出這樣的錯誤。