运行Java Servlet无法查看欢迎页面404错误

Question

Having an issue like this.

Error 404--Not Found

From RFC 2068 Hypertext Transfer Protocol -- HTTP/1.1:

10.4.5 404 Not Found

web.xml

Here is my ..\\MTSM\\src\\main\\webapp\\WEB-INF\\web.xml

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

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

    <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>

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


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

</web-app>

mvc-dispacher-servlet.xml

Here is my ..\\MTSM\\src\\main\\webapp\\WEB-INF\\mvc-dispacher-servlet.xml

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

    <context:component-scan base-package="com.springapp.mvc"/>

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

</beans>

hello.jsp

Here is my ..\\MTSM\\src\\main\\webapp\\WEB-INF\\pages\\hello.jsp

    $.get('ActionAdet', {opername: 'services'}, function (responseJson) { } ) ;..

hello.HelloController.java

Here is my ..\\MTSM\\src\\main\\java\\com\\springapp\\mvc\\HelloController.java

@Controller
@RequestMapping("/")
public class HelloController {
    @RequestMapping(method = RequestMethod.GET)
    public String printWelcome(ModelMap model) {
        model.addAttribute("message", "Hello world!");
        return "ss";
    }
}

ActionAdet.java

Here is my ..\\MTSM\\src\\main\\java\\com\\springapp\\mvc\\ActionAdet.java

@Controller
@RequestMapping("/ActionAdet")
public class ActionAdet extends HttpServlet { } etc..

I can't view my project in this url: localhost:7001/MTSM/

and also not available in: localhost:7001/MTSM/hello.jsp

It was working 2 days ago. I think I'm deleted something in web.xml , but I don't remember.
Do you know what problem is?

I uploaded my project here: [Dropbox -- MTSM_20140112.zip][3]

Thanks.

Answer 1

According to the logs you provided in pastie (that's bad : you should have providen the relevant part as an edit), spring tried to load WEB-INF/pages/ss.jsp and did not find it. I means :

• you probably hit the controller HelloController
• the method printWelcome returned ss as a string
• due to mvc-dispacher-servlet.xml , InternalResourceViewResolver looked for WEB-INF/pages/ss.jsp (normal untill here)
• as the file does not exist you got a 404 error (still normal : it is not what you expected, but what you asked)

You should try to be coherent between view names returned by controller and actual jsp file :

@RequestMapping("/")
public class HelloController {
    @RequestMapping(method = RequestMethod.GET)
    public String printWelcome(ModelMap model) {
        model.addAttribute("message", "Hello world!");
        return "hello";
    }
}

should forward to view WEB-INF/pages/hello.jsp (that exists according to you project image)