Question

首先，我无法获取索引页面，但我使用404 error for tomcat 6 for spring application

解决了该问题

获得索引页面后，当我点击链接时，我无法将请求映射到我的控制器。

studentspringmvc.xml

<Context path="/studentspringmvc"
  docBase="/home/shoaib/Documents/myprograms/studentspringmvc/src/main/webapp" 
  reloadable="true" 
  debug="9" />

的web.xml

<?xml version="1.0" encoding="UTF-8"?>
  <web-app version="2.5" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="http://java.sun.com/xml/ns/javaee"
     xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

<display-name>Spring MVC Application</display-name>

<context-param>
    <param-name>contextConfigLocations</param-name>
    <param-value>classpath*:applicationContext.xml</param-value>
</context-param>


<servlet>
    <servlet-name>mvc-dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>

<servlet-mapping>
    <servlet-name>mvc-dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
</welcome-file-list>

StudentDetailsController.java

package com.semanticbits.studentspringapp.controller;

import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;


@Controller
@RequestMapping("/studentDetails")
public class StudentDetailsController {

   private static final Logger logger = Logger.getLogger(StudentDetailsController.class);

   public StudentDetailsController() {
      System.out.println("In Student Constructor");
   }

   @RequestMapping(method=RequestMethod.GET)
   public String showForm(ModelMap map){
    logger.info("In service method");
    System.out.println("In Student Details");
    return "studentdetails";
   }
}

MVC-调度-servlet.xml中

<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   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/context http://www.springframework.org/schema/context/spring-context.xsd
    http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

<context:component-scan base-package="com.semanticbits.studentspringapp.*"/>
<mvc:annotation-driven/>
<mvc:default-servlet-handler/>


<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/pages/"/>
    <property name="suffix" value=".jsp"/>
</bean>

的index.jsp

<!DOCTYPE html>
<html>
<head>
<title></title>
</head>
<body>
   <a href="/studentDetails">Click here</a>
</body>
</html>

当我点击此链接时，它应该映射到StudentDetailsController showForm方法，显示另一个studentdetails.jsp，但我得到404.

Answer 1

最重要的是，你错过了

<mvc:annotation-driven />

在您的servlet上下文中，它发现了@Controller带注释的bean及其@RequestMapping带注释的方法等。

没有它，您的控制器bean会保留在上下文中，而不会做太多。 DispatcherServlet未注册。

然后，当您在

中指定前导/时

<a href="/studentDetails">Click here</a>

浏览器根据您的主机地址发出请求。所以，如果你的主机IP是

127.0.0.1

然后请求

127.0.0.1/studentDetails

但你似乎有一个上下文路径

<Context path="/studentspringmvc"

所以你需要把它改成

<a href="/studentspringmvc/studentDetails">Click here</a>

或更好，make it dynamic

<a href="${pageContext.request.contextPath}/studentDetails">Click here</a>

无法在Spring MVC 3中将请求映射到Controller

1 个答案: