SSM整合为何找不到路径，总是404

[wudijungeone]

我们不废话，直奔主题，对于帮助的人感激不尽
web.xml如下

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 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_3_0.xsd">
    <display-name>demo</display-name>
    
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <!-- 
            配置路径方式有两种，一种是将文件放到WEB-INF目录下 parm-value的值为/WEB-INF/文件名.xml,另外一种是用classpath:文件名.xml
            文件放到/src/main/resources/下 
        -->
        <param-value>/WEB-INF/test-servlet-root.xml</param-value>
    </context-param>
    
    <context-param>
        <param-name>log4jExposeWebAppRoot</param-name>
        <param-value>false</param-value>
    </context-param>
    <!-- character -->
    <filter>
        <filter-name>characterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    
    <!-- spring mvc -->
    <servlet>
        <servlet-name>test</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/test-servlet.xml</param-value>
         </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>test</servlet-name>
        <url-pattern>/*</url-pattern>
    </servlet-mapping>
    
    <listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
</web-app>

test-servlet.xml

<?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:context="http://www.springframework.org/schema/context"
    xmlns:util="http://www.springframework.org/schema/util" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd 
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd 
    http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.3.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd" default-autowire="byName">
    <description>demo</description>
    	
  <!--Spring3.1开始的注解 HandlerMapping -->  
	<bean   
	class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>  
	<!--Spring3.1开始的注解 HandlerAdapter -->  
	<bean  
	class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>
	  
	<!-- InternalResourceViewResolver：用于支持Servlet、JSP视图解析；
    viewClass：JstlView表示JSP模板页面需要使用JSTL标签库，classpath中必须包含jstl的相关jar包；
    prefix和suffix：查找视图页面的前缀和后缀（前缀[逻辑视图名]后缀），比如传进来的逻辑视图名为hello，则该该jsp视图页面应该存放在“WEB-INF/jsp/hello.jsp”； 
    -->  
	<!-- ViewResolver -->  
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
    	<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>  
    	<property name="prefix" value="/WEB-INF/jsp/"/>  
    	<property name="suffix" value=".jsp"/>  
	</bean>
	<context:component-scan base-package="sy.controller"></context:component-scan>   
</beans>

test-servlet-root.xml

<?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:context="http://www.springframework.org/schema/context"
    xmlns:util="http://www.springframework.org/schema/util" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd 
    http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd
    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.3.xsd 
    http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-4.3.xsd
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd" default-autowire="byName">
    <description>Spring公共配置</description>
    
    <!--  <import resource="classpath*:demo-db.xml"/> -->
</beans>

sy.controller下的HelloWorldController代码如下
import org.springframework.web.servlet.ModelAndView;

@Controller
@RequestMapping(value="/a")
public class HelloWorldController{  
    @RequestMapping(value="/hello")
    public ModelAndView handleRequest(){  
       //1、收集参数、验证参数  
       //2、绑定参数到命令对象  
       //3、将命令对象传入业务对象进行业务处理  
       //4、选择下一个页面  
       ModelAndView mv = new ModelAndView();  
       //添加模型数据 可以是任意的POJO对象  
       mv.addObject("message", "Hello World!");  
       //设置逻辑视图名，视图解析器会根据该名字解析到具体的视图页面  
       mv.setViewName("hello");  
       return mv;  
    }  
}  

项目名为testmybatis2,使用Tomcat
Tomcat启动的一段信息如下：
May 14, 2017 3:28:12 PM org.springframework.web.servlet.DispatcherServlet initServletBean
信息: FrameworkServlet 'test': initialization started
May 14, 2017 3:28:12 PM org.springframework.web.context.support.XmlWebApplicationContext prepareRefresh
信息: Refreshing WebApplicationContext for namespace 'test-servlet': startup date [Sun May 14 15:28:12 CST 2017]; parent: Root WebApplicationContext
May 14, 2017 3:28:12 PM org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from ServletContext resource [/WEB-INF/test-servlet.xml]
May 14, 2017 3:28:12 PM org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping register
信息: Mapped "{[/a/hello]}" onto public org.springframework.web.servlet.ModelAndView sy.controller.HelloWorldController.handleRequest()
May 14, 2017 3:28:13 PM org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter initControllerAdviceCache
信息: Looking for @ControllerAdvice: WebApplicationContext for namespace 'test-servlet': startup date [Sun May 14 15:28:12 CST 2017]; parent: Root WebApplicationContext
May 14, 2017 3:28:14 PM org.springframework.web.servlet.DispatcherServlet initServletBean
信息: FrameworkServlet 'test': initialization completed in 2134 ms
May 14, 2017 3:28:14 PM org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["http-bio-8080"]
May 14, 2017 3:28:14 PM org.apache.coyote.AbstractProtocol start
信息: Starting ProtocolHandler ["ajp-bio-8009"]
May 14, 2017 3:28:14 PM org.apache.catalina.startup.Catalina start
信息: Server startup in 5629 ms

这里已经出现了/a/hello字样，为何我访问
http://localhost:8080/testmybatis2/a/hello还是404，先谢谢各位

[爱摸鱼de老邪]

tomcat的webapps有没有你那个项目的部署？

[李德胜1995]

在handleRequest()方法里面打印一下进入了没？？？

[wudijungeone]

花了一天终于找到问题了，之前去网站粘贴了一部分的代码，然后pom.xml他是改了项目名字的，所以我的Tomcat里显示的是两个名字，mytestmybatis2(XXX),上网查了下，发现了问题，现在改回来了，谢谢大家，具体可参考http://blog.csdn.net/ps_zhanglei/article/details/50013431