Spring MVC無法解析視圖名稱

Question

我正在編寫一個應用程序，我希望該應用程序能夠打包到一個可執行的Jar中，並使用嵌入式Web服務器來提供REST API和使用該API的一組配置頁（允許其他用戶訪問該API）服務器外部的客戶端（例如Android應用）。

到目前為止，我已經使用了基本的REST API，但是在視圖中使用它時仍然遇到問題，我嘗試按照此處的指南進行操作，但無法將視圖名稱解析為JSP頁面。 以下是一些日志行，似乎表明它無法解決該問題：

15:37:23.559 [http-nio-8080-exec-1] DEBUG org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Looking up handler method for path /UserPage
15:37:23.560 [http-nio-8080-exec-1] DEBUG org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Did not find handler method for [/UserPage]
15:37:23.561 [http-nio-8080-exec-1] DEBUG org.springframework.web.servlet.handler.SimpleUrlHandlerMapping - Matching patterns for request [/UserPage] are [/**]
15:37:23.561 [http-nio-8080-exec-1] DEBUG org.springframework.web.servlet.handler.SimpleUrlHandlerMapping - URI Template variables for request [/UserPage] are {}
15:37:23.562 [http-nio-8080-exec-1] DEBUG org.springframework.web.servlet.handler.SimpleUrlHandlerMapping - Mapping [/UserPage] to HandlerExecutionChain with handler [org.springframework.web.servlet.resource.ResourceHttpRequestHandler@37f9ecb0] and 1 interceptor
15:37:23.563 [http-nio-8080-exec-1] DEBUG org.springframework.web.servlet.DispatcherServlet - Last-Modified value for [/UserPage] is: -1
15:37:23.564 [http-nio-8080-exec-1] DEBUG org.springframework.web.servlet.resource.ResourceHttpRequestHandler - Trying relative path [UserPage] against base location: ServletContext resource [/]
15:37:23.564 [http-nio-8080-exec-1] DEBUG org.springframework.web.servlet.resource.ResourceHttpRequestHandler - Trying relative path [UserPage] against base location: class path resource [META-INF/resources/]
15:37:23.565 [http-nio-8080-exec-1] DEBUG org.springframework.web.servlet.resource.ResourceHttpRequestHandler - Trying relative path [UserPage] against base location: class path resource [resources/]
15:37:23.565 [http-nio-8080-exec-1] DEBUG org.springframework.web.servlet.resource.ResourceHttpRequestHandler - Trying relative path [UserPage] against base location: class path resource [static/]
15:37:23.566 [http-nio-8080-exec-1] DEBUG org.springframework.web.servlet.resource.ResourceHttpRequestHandler - Trying relative path [UserPage] against base location: class path resource [public/]
15:37:23.566 [http-nio-8080-exec-1] DEBUG org.springframework.web.servlet.resource.ResourceHttpRequestHandler - No matching resource found - returning 404

我有一種感覺，因為我試圖在嵌入式Tomcat服務器上運行它（而不是將其部署到Tomcat服務器），所以我錯過了將/webapp/目錄配置為/webapp/的步驟，但是對於Spring來說卻是相當陌生的所以不確定我缺少什么。

src / main / webapp / web.xml：

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

<display-name>IeNoTenshi</display-name>
<description>IeNoTenshi internal webserver</description>

<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>

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/mvc-dispatcher-servlet.xml</param-value>
</context-param>

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

src / main / webapp / WEB-INF / mvc-dispatcher-servlet.xml

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="
    http://www.springframework.org/schema/beans     
    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-3.0.xsd">

<context:component-scan base-package="com.dan_nixon.ienotenshi.web.service" /> 
<mvc:annotation-driven/>

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

</beans>

src / com / dan_nixon /.../ web / service / UsersController.java

@Controller
@RequestMapping("/service")
public class UsersController {
private static final Logger log = LoggerFactory.getLogger(UsersController.class);
public static final int DEFAULT_COUNT = 10;

@RequestMapping(method=RequestMethod.GET)
public String test(ModelMap model) {
    model.addAttribute("username", "test");
    model.addAttribute("name", "Test User");
    return "UserPage";
}

@RequestMapping(value="/user/{user_id}", method=RequestMethod.GET)
public @ResponseBody ModelAndView getUser(@PathVariable long user_id,
        Model model) {
    INTObjectDB db = new INTObjectDB();
    db.open();
    User user = db.getUser(user_id);
    user.getPermissions();
    db.close();
    ModelAndView mav = new ModelAndView();
    mav.setViewName("UserPage");
    mav.addObject("username", user.getUsername());
    mav.addObject("name", user.getName());
    log.error(String.format("%s", mav));
    return mav;
}

Answer 1

出現此錯誤消息

15：37：23.559 [http-nio-8080-exec-1]調試org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping-查找路徑/ UserPage的處理程序方法

看來您正在嘗試訪問類似

localhost:8080/yourApp/UserPage

但是您顯然沒有映射到該URL的處理程序方法。 您所擁有的是一個映射到/service的處理程序方法，用於處理GET請求

@RequestMapping(method=RequestMethod.GET)
public String test(ModelMap model) {
    model.addAttribute("username", "test");
    model.addAttribute("name", "Test User");
    return "UserPage";
}

您應該將請求發送到

localhost:8080/yourApp/service