java-jsp springmvc-controller 传值到页面的方法
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:
<!-- jstl(jsp 标准标签库) --> ;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"%> <!-- 引入jstl core库 ,使用 循环标签--> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <!-- 引入jstl fmt库,格式化时间标签 --> <%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %> <!-- 开启 EL 表达式支持 --> <%@ 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>
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