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java-jsp springmvc-controller 传值到页面的方法

作者：草青工作室　　发布时间：2023-06-16 18:19:52　

标签：springmvc,jsp,传值,controller

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" rel="external nofollow" />
</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>

来源：https://blog.csdn.net/xxj_jing/article/details/68488174

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java-jsp springmvc-controller 传值到页面的方法

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