@ModelAttribute也可以做為Model輸出到View時使用,比如:
測試例子
package com.my.controller; import java.util.ArrayList; import java.util.List; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import com.my.controller.bean.Account; @Controller @RequestMapping(value="attr") public class TestModelAttributeController { private static List<Account> accounts = new ArrayList<Account>(); { accounts.add(new Account()); accounts.add(new Account()); Account ac1 = accounts.get(0); Account ac2 = accounts.get(1); ac1.setUserName("Robin"); ac1.setPassword("123123"); ac2.setUserName("Lucy"); ac2.setPassword("123456"); } @RequestMapping(method=RequestMethod.GET) public String index() { System.out.println("index"); return "TestModelAttribute/index"; } @ModelAttribute("accounts") public List<Account> getAccounts() { System.out.println("getAccounts"); return accounts; } }
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %> <%@ taglib prefix="st" uri="http://www.springframework.org/tags" %> <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%> <!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>TestModelAttribute</title> </head> <body> <c:forEach items="${accounts}" var="item"> <c:out value="${item.userName}"></c:out><br/> </c:forEach> </body> </html>
頁面將輸出:
在Console中輸出為:
這里可以看到,運行的先后次序為:先調用getAccounts(),再調用index()。
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