java-jsp springmvc-controller 传值到页面

青旅半醒 2024-02-17 20:41 44阅读 0赞

java-jsp springmvc-controller 传值到页面  
  
  
借助 org.springframework.ui.Model 对象或 Map 对象将信息传到 springmvc 的页面中  
  
  
需要：jstl 支持 和 EL 表达式  
  
  
1.maven 添加依赖：

<dependency>
    	    <groupId>jstl</groupId>
    	    <artifactId>jstl</artifactId>
    	    <version>1.2</version>
    	</dependency>

2.controller 中的方法

/** 
    *
    */
    @Controller
    @RequestMapping("/hello")
    public class HelloController {
    	/**
    	 * 请求地址：项目名/hello/userinfo
    	 * @return
    	 */
    	@RequestMapping("userinfo")
    	public String userinfo(org.springframework.ui.Model model,Map<String, Object> map){
    		//传递单个对象
    		UserInfoModel info = new UserInfoModel("张三",99,"男");
    		model.addAttribute("info",info);		
    		
    		List<UserInfoModel> list = new ArrayList<UserInfoModel>();
    		list.add(new UserInfoModel("李四",20,"男"));
    		list.add(new UserInfoModel("王五",21,"女"));
    		list.add(new UserInfoModel("赵六",22,"男"));
    		
    		//传递多个对象
    		map.put("user_list", list);
    		
    		return "hello/userinfo"; //servlet.xml 中定义的 前缀（prefix）+返回值+后缀（suffix）拼接的物理地址
    	}
    }

3.测试实体对象

package demo.models.hello;
    
    
    import java.util.Date;
    
    
    /** 
    *
    */
    public class UserInfoModel {
    	public UserInfoModel(String name,int age,String sex){
    		this.name=name;
    		this.age=age;
    		this.sex=sex;
    		this.date = new Date();
    	}
    	String name;
    	int age;
    	String sex;
    	Date date;
    	
    	public Date getDate() {
    		return date;
    	}
    	public void setDate(Date date) {
    		this.date = date;
    	}
    	public String getName() {
    		return name;
    	}
    	public void setName(String name) {
    		this.name = name;
    	}
    	public int getAge() {
    		return age;
    	}
    	public void setAge(int age) {
    		this.age = age;
    	}
    	public String getSex() {
    		return sex;
    	}
    	public void setSex(String sex) {
    		this.sex = sex;
    	}
    	
    }

4.jsp 页面

<%@ page language="java" contentType="text/html; charset=utf-8"
    	pageEncoding="utf-8"%>
    	
    <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
    
    <%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
    
    <%@ page isELIgnored="false"%>
    <!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>
    	<script scr="/content/index.js"></script>
    	<link href="/content/index.css"/>
    </head>
    <body>
    	<h3>页面信息</h3>
    	<div>url：${pageContext.request.contextPath}</div>
    	<h3>用户信息</h3>
    	<div>name：${info.name}</div>
    	<div>age：${info.age}</div>
    	<div>sex：${info.sex}</div>
    	<div>date:<fmt:formatDate pattern="yyyy-MM-dd HH:mm:ss" value="${info.date}" /></div>
    	<h3>用户列表</h3>
    	<table border="1">
    	<tr>
    		<td>name</td>
    		<td>age</td>
    		<td>sex</td>
    		<td>date</td>
    	</tr>
    	<c:forEach items="${user_list}" var="p">
    	<tr>
    		<td>${p.name}</td>
    		<td>${p.age}</td>
    		<td>${p.sex}</td>
    		<td><fmt:formatDate pattern="yyyy-MM-dd HH:mm:ss" value="${p.date}"/></td>
    	</tr>
    	</c:forEach>
    	<tr>
    		<td colspan="4" style="text-align: center;">jstl forEach</td>
    	</tr>	
    	<tr>
    		<td>行号</td>
    		<td>col1</td>
    		<td>col2</td>
    		<td>col3</td>
    	</tr>
    	<c:forEach begin="1" end="5" var="i">
    	<tr>
    		<td>${i}</td>
    		<td>${i+2}</td>
    		<td>${i+3}</td>
    		<td>${i+4}</td>
    	</tr>
    	</c:forEach>
    	</table>
    </body>
    </html>