首先,我是
Spring MVC世界的新手.
我做了一个简单的程序,其中Spring MVC将处理GET请求并设置一个名为“message”的变量.此变量应在JSP中显示设置值,但未按预期执行.代码正在编译并运行正常.能告诉你,这里做错了什么？
web.xml中
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<display-name>Archetype Created Web Application</display-name>
<servlet>
<servlet-name>logindispacher</servlet-name>
<servlet-class>org.springframework.web.servlet.dispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>logindispacher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
logindispacher-servlet.xml中
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
<context:component-scan base-package="com.sandeep" />
<!-- View resolver -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
Authorization.java
@Controller
@RequestMapping("/authorization")
public class Authorization {
String message = "This is message from Java class";
@RequestMapping(method=RequestMethod.GET)
public String printHello(ModelMap model){
System.out.println("From controller");
model.addAttribute("message","Hellow Spring MVC Framework!");
return "authorization";
}
}
旧的authorization.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<head>
<title>Hello Spring MVC</title>
</head>
<body>
<h2> <c:out value="${message}" /> </h2>
</body>
</html>
更新和工作的authorization.jsp
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<title>Hello Spring MVC</title>
</head>
<body>
<h2>
<c:out value="${message}" />
</h2>
</body>
</html>
产量
解决方法
您的问题与Spring MVC无关. ${message}是EL(表达语言).它是Java EE的一部分(以及JSP规范的前一部分).由于某种原因,它无法在您的页面上运行.
尝试使用以下内容替换web.xml的开头：
<?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">