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userList);return "list";}} list.jsp %@ page language="java"

2024-03-31 Web开发

对付需要返回界面的数据，可以将后台封装好的数据回显至原始jsp界面中。

举个例子：

User.java

package com.zk.data; public class User { public String sname; public String sno; public String sid; public String getSname() { return sname; } public void setSname(String sname) { this.sname = sname; } public String getSno() { return sno; } public void setSno(String sno) { this.sno = sno; } public String getSid() { return sid; } public void setSid(String sid) { this.sid = sid; } }

UserCustom.java

package com.zk.data; import java.util.HashMap; import java.util.List; import java.util.Map; public class UserCustom { private User user; private List<User> userList; private Map<String,Object> usermap=new HashMap<String,Object>(); public User getUser() { return user; } public void setUser(User user) { this.user = user; } public List<User> getUserList() { return userList; } public void setUserList(List<User> userList) { this.userList = userList; } public Map<String, Object> getUsermap() { return usermap; } public void setUsermap(Map<String, Object> usermap) { this.usermap = usermap; } @Override public String toString() { return "UserCustom [user=" + user + "]"; } }

　SpringMVC.xml

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"> <context:component-scan base-package="com.zk.Controller"></context:component-scan>  <bean></bean>  <bean></bean> <bean> <property value="/WEB-INF/jsp/"></property> <property value=".jsp"></property> </bean> </beans>

UserController.java

package com.zk.Controller; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Map.Entry; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.servlet.ModelAndView; import com.zk.data.User; import com.zk.data.UserCustom; @Controller//<bean> public class UserController { //接受javaBean参数 @RequestMapping("list") public String list(Model model){ List<User> userList=new ArrayList<User>(); User user1=new User(); user1.setSid("1"); user1.setSname("a"); user1.setSno("No1"); User user2=new User(); user2.setSid("2"); user2.setSname("b"); user2.setSno("No2"); User user3=new User(); user3.setSid("2"); user3.setSname("b"); user3.setSno("No3"); userList.add(user1); userList.add(user2); userList.add(user3); model.addAttribute("userList", userList); return "list"; } }

list.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"http://www.mamicode.com/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="http://www.mamicode.com/<%=basePath%>"> <title>回显List调集</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">  </head> <body> <h1>欢迎来SpringMVC</h1> <table border=‘1‘> <tr> <td>姓名</td> <td>ID</td> <td>编号</td> </tr> <c:forEach items="${userList}" var="user"> <tr> <td>${user.sname}</td> <td>${user.sid}</td> <td>${user.sno}</td> <td><a href="${pageContext.request.contextPath }/${user.sid}.do">改削</a></td> </tr> </c:forEach> </table> </body> </html>

　　运行后功效如下：

技术图片

二.URL模板映射

在上面的例子中，，list.jsp页面里有行URL模板映射

在后台UserController.java的措置惩罚惩罚逻辑如下：

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userList);return "list";}} list.jsp %@ page language="java"

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