Servlet作业小练习
一.题目
利用JavaBean实现用户类，包含姓名、性别、爱好，爱好需要用多选框
实现表单1进行获取数据，表单2显示获取结果。
利用Servlet实现逻辑代码
二.实现效果
三.具体实现
1.User实体类
package com.hjj.pojo;
/**
* @author:嘉佳 Date:2023/11/6 0:10
**/
public class User {
private String name;
private String sex;
private String[] hobbies;
public User() {
}
public User(String name, String sex, String[] hobbies) {
this.name = name;
this.sex = sex;
this.hobbies = hobbies;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String[] getHobbies() {
return hobbies;
}
public void setHobbies(String[] hobbies) {
this.hobbies = hobbies;
}
}
2.dataEntry.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>用户信息录入</title>
</head>
<body>
<%--
设置 input 标签的 type 为checkbox 或者 radio 时，
必须同时设置 input 标签的 value 属性，此时 value 的值就是提交给服务器的值
--%>
<form action=${pageContext.request.contextPath}/show method="post">
用户名：<input type="text" name="name"><br>
性别：<input type="radio" name="sex" value="男">男
<input type="radio" name="sex" value="女">女<br>
爱好：<input type="checkbox" name="hobbies" value="吃饭">吃饭
<input type="checkbox"name="hobbies" value="睡大觉">睡大觉
<input type="checkbox" name="hobbies" value="CRUD">CRUD<br>
<input type="submit" value="提交">
</form>
</body>
</html>
3.showInfo.jsp
<%@ page import="com.hjj.pojo.User" %><%--
Created by IntelliJ IDEA.
User: ALASIJIA
Date: 2023/11/11
Time: 17:08
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<meta charset="UTF-8">
<title>用户信息</title>
</head>
<body>
<%
request.setCharacterEncoding("UTF-8");
%>
<%
// 从 ServletContext 中获取 JavaBean
User user = (User) application.getAttribute("user");
%>
<h1>用户信息</h1>
<p>姓名：<%=user.getName()%>
</p>
<p>性别：<%=user.getSex()%>
</p>
<p>爱好：<% for (String hobby : user.getHobbies()) { %>
<%= hobby %>
<% } %>
</p>
</body>
</html>
4.sevlet文件
package com.hjj.sevletgk.hw9;
import com.hjj.pojo.User;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
/**
* @author:嘉佳 Date:2023/11/11 16:20
**/
@WebServlet("/show")
public class showInfo extends HttpServlet {
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
req.setCharacterEncoding("UTF-8");
String name = req.getParameter("name");
String sex = req.getParameter("sex");
String[] hobbies = req.getParameterValues("hobbies");
User user = new User(name, sex, hobbies);
ServletContext servletContext = getServletContext();
servletContext.setAttribute("user",user);
resp.setCharacterEncoding("UTF-8");
resp.sendRedirect("hw9/showUser.jsp");
}
}
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