Question

我在从控制器到JSP视图中显示模型值时遇到了困难。一切都在Tomcat 6中工作。但它在Tomcat 5.5中不起作用。这是我的档案。

Tomcat 5.5的

web.xml （对于Tomcat 6，我使用版本=“2.5”和正确的架构）

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
    version="2.4">

版本：

Tomcat ：5.5

Taglib ：jstl.jar，standard.jar（1.1版）

控制器

@Controller
@RequestMapping("/inventory")
public class SimpleController {

        @Autowired
        @Qualifier("inventoryService")
        private IInventoryService inventoryService;

        // Our default method when a simple GET request is made to /simple
        @SuppressWarnings("unchecked")
        @RequestMapping(method = RequestMethod.GET)
        public String viewProducts(ModelMap model) {
            List<IInventory> retrieved = inventoryService.getInventories();
            List <InventoryDTO> inventories = new ArrayList();

            for (IInventory inventory: retrieved) {
                InventoryDTO inventoryDTO= new InventoryDTO();
                inventoryDTO.setId(inventory.getId());
                inventoryDTO.setBrandName(inventory.getBrand().getName());
                inventories.add(inventoryDTO);
            }

            model.put ( "inventories", inventories );

            // This will resolve to a logical view name /WEB-INF/jsp/inventoriesView.jsp
            return "inventoriesView";
        }

}

inventoriesView.jsp

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<%@ taglib uri="http://www.springframework.org/tags" prefix="spring" %>
<html>
<head>
    <style type="text/css">
    <%@include file="../../resources/style.css" %>
    </style>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Inventories</title>
</head>
<body>
<h1>Inventory</h1>
<br/>
<%@include file="menu.jsp" %>
<br /><br />
<c:if test="${!empty inventories}" >
    <table class="table" border="1">
        <tr>
            <th>ID</th>
            <th>Brand</th>
        </tr>
        <c:forEach items="${inventories}" var="inventory">
        <tr>
            <td><c:out value="${inventory.id}" /></td>
            <td><c:out value="${inventory.brandName}" /></td>
        </tr>
        </c:forEach>
    </table>
</c:if>
<c:if test="${empty inventories}">
    There are currently no inventories.
</c:if>
</body>
</html>

请记住，这在Tomcat 6.0中完美无缺，但在Tomcat 5.5中无法正常工作。我没有得到任何错误。它只是不会显示数据，就好像模型为null。当我调用EL表达式{2 + 2}时，我得到4作为Tomcat 5.5和6的值。谢谢

Answer 1

我猜测你的/WEB-INF/lib中有一个Tomcat 6特定的EL JAR文件导致其他人 - 在Tomcat 5.5中EL empty关键字失败。确保您的/WEB-INF/lib没有特定于servletcontainer的库。我还会在启动和webapp初始化期间检查Tomcat 5.5日志中的任何故障。这些将不会在webapp错误页面中表示。

Answer 2

<dependency>
    <groupId>taglibs</groupId>
    <artifactId>standard</artifactId>
    <version>1.1.2</version>
    <scope>compile</scope>
</dependency>

Spring MVC 3 JSTL不会在Tomcat 5.5中输出值

2 个答案: