Question

我试图在通过控制器返回的jsp页面中显示对象，但是在jsp中看不到对象。以下是我的控制器：

@RequestMapping(value = "/search/{groupName}", menthod = {RequestMethod.Get, RequestMethod.POST})
public ModelAndView groupAlphaHandler(@PathVariable("groupName") String groupName, HttpServletRequest request) {

    ArryList<GroupAlphaInfoVO> groupAlphaInfoVO = groupAlphaService.loadGroupAlphaSearchResult(groupName);
    //view name "group-alpha"     
    ModelAndView mav = new ModelAndView("group-alpha");
    mav.addObject("groupAlphaInfoVO", groupAlphaInfoVO);
    mav.addObject("pageTitle", "Group Alpha");
    //added debug point here and made sure groupAlphaInfoVO is not null (it has around 1000 records)
    return mav;
    }

这是我的jsp页面 group-alpha.jsp ：

<html>
<head>
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Group Alpha</title>
</head>
<body>
        ${pageTitle}<!-- this is getting displayed on jsp-->
	${groupAlphaInfoVO}
</body>
</html>

Answer 1

似乎您在

中犯了一个愚蠢的错误

@RequestMapping(value = "/search/{groupName}", menthod = {RequestMethod.Get, RequestMethod.POST})

存在拼写错误。不是menthod，而是method：P 而且我觉得没有必要使用RequestMethod.POST

另一个错误是mav.addObject("groupAlphaInfoVO", groupAlphaInfoVO);与您要放入对象列表的这段代码。并且在jsp页面中，您没有对列表执行任何操作。要打印该列表，您应该编写<c:forEach>....</c:forEach>代码。例如

<c:forEach var="results" items="${groupAlphaInfoVO}">
       <c:out value="${results.userid}"></c:out>
       <c:out value="${results.password}"></c:out>
       <c:out value="${results.role}"></c:out>
       <c:out value="${results.contact}"></c:out>
       <c:out value="${results.mentor}"></c:out>
       <c:out value="${results.group}"></c:out>
</c:forEach>

要使用，您需要在pom.xml中添加JSTL依赖项

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

然后在您的jsp页面顶部添加<%@ taglib uri = "http://java.sun.com/jsp/jstl/core" prefix = "c" %>。

Answer 2

您需要这个isELIgnored="false"

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1" isELIgnored="false"%>  //here

ModelAndView没有在Spring MVC中将模型返回给JSP

2 个答案: