jsp中的Spring MVC模型访问失败
sse*_*sse 3 model-view-controller spring model maven
我是Spring的新手.我在eclipse中创建了一个maven项目,通过类似Spring示例SVN存储库中的mvc-basic示例来测试Spring MVC.当我试图在jsp中检索模型值时,jsp只显示$ {模型属性名称},而不是模型属性值.
我是否会错过任何使Spring无法检索模型值的内容？
以下是详细信息:
代码:控制器:
@Controller
public class TestAction {
@RequestMapping(value="/test" , method=RequestMethod.GET)
public String returnHelloWorld(Model model)
{
ObjectTest objectTest=new ObjectTest();
objectTest.setName("heng");
model.addAttribute(objectTest);
return "/test/start";
}
}
代码JSP:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<%@ taglib prefix="s" uri="http://www.springframework.org/tags" %>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
hello ${objectTest.name}
</body>
</html>
在服务器(tomcat 6)上运行时,显示的页面就像
你好$ {objectTest.name}
但应该是
你好
POM.XML文件:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven- 4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>heng.spring</groupId>
<artifactId>firststudy</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<org.springframework.version>3.0.5.RELEASE</org.springframework.version>
<org.slf4j.version>1.6.1</org.slf4j.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
</project>
这是快照
注意:
我创建了一个普通的eclipse动态项目并创建了相同的控制器,jsp和其他组件.并且jsp可以成功检索模型值.这是项目和罐子的快照.
不同的是,这个项目有springframework.web.servlet jar,而maven项目有sprinng-webmvc jar
问题的原因是EL未启用
启用EL,我改变了web.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
....
</web-app>
至
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
</web-app>
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