java Spring MVC - 在名为“appServlet”的 DispatcherServlet 中找不到带有 URI [/demo/test] 的 HTTP 请求的映射
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Spring MVC - No mapping found for HTTP request with URI [/demo/test] in DispatcherServlet with name 'appServlet'
提问by Remzi Ibrahim Zayid
I'm using Spring MVC to create a small web application. When I try to hit a URL that seems to be mapped properly in my controller, I get a 404. I'm trying to hit /projectname/test- and this is what shows in the log when I attempt to do that:
我正在使用 Spring MVC 创建一个小型 Web 应用程序。当我尝试点击似乎在我的控制器中正确映射的 URL 时，我得到一个 404。我正在尝试点击 /projectname/test- 这就是我尝试这样做时日志中显示的内容：
WARN : org.springframework.web.servlet.PageNotFound - No mapping found for HTTP request with URI [/demo/test] in DispatcherServlet with name 'appServlet'
警告：org.springframework.web.servlet.PageNotFound - 在名为“appServlet”的 DispatcherServlet 中找不到带有 URI [/demo/test] 的 HTTP 请求的映射
I've seen a lot of similar questions being asked, but none of the suggested fixes worked for me. I'm using Spring MVC and the server can't seem to resolve the URL coming in through the browser. The strange thing is that "/projectname" works great, but "/projectname/test" won't seem to work at all. The JSPs are all in the same directory (src/main/webapp/WEB-INF/views/) with the following names:
我看到很多类似的问题被问到，但没有一个建议的修复对我有用。我正在使用 Spring MVC，服务器似乎无法解析通过浏览器传入的 URL。奇怪的是“/projectname”很好用，但“/projectname/test”似乎根本不起作用。JSP 都在同一个目录 (src/main/webapp/WEB-INF/views/) 中，名称如下：
- home.jsp
- test.jsp
- userInfo.jsp
- 主页.jsp
- 测试.jsp
- 用户信息.jsp
Here is my code:
这是我的代码：
pom.xml:
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.springapp</groupId>
<artifactId>demo</artifactId>
<name>demo</name>
<packaging>war</packaging>
<version>1.0.0-BUILD-SNAPSHOT</version>
<properties>
<java-version>1.6</java-version>
<org.springframework-version>3.1.1.RELEASE</org.springframework-version>
<org.aspectj-version>1.6.10</org.aspectj-version>
<org.slf4j-version>1.6.6</org.slf4j-version>
</properties>
<dependencies>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${org.springframework-version}</version>
<exclusions>
<!-- Exclude Commons Logging in favor of SLF4j -->
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${org.springframework-version}</version>
</dependency>
<!-- AspectJ -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>${org.aspectj-version}</version>
</dependency>
<!-- Logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${org.slf4j-version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${org.slf4j-version}</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.15</version>
<exclusions>
<exclusion>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
</exclusion>
<exclusion>
<groupId>javax.jms</groupId>
<artifactId>jms</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.jdmk</groupId>
<artifactId>jmxtools</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.jmx</groupId>
<artifactId>jmxri</artifactId>
</exclusion>
</exclusions>
<scope>runtime</scope>
</dependency>
<!-- @Inject -->
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
<!-- Servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.1</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- Test -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.7</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.9</version>
<configuration>
<additionalProjectnatures>
<projectnature>org.springframework.ide.eclipse.core.springnature</projectnature>
</additionalProjectnatures>
<additionalBuildcommands>
<buildcommand>org.springframework.ide.eclipse.core.springbuilder</buildcommand>
</additionalBuildcommands>
<downloadSources>true</downloadSources>
<downloadJavadocs>true</downloadJavadocs>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<configuration>
<source>1.6</source>
<target>1.6</target>
<compilerArgument>-Xlint:all</compilerArgument>
<showWarnings>true</showWarnings>
<showDeprecation>true</showDeprecation>
</configuration>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>exec-maven-plugin</artifactId>
<version>1.2.1</version>
<configuration>
<mainClass>org.test.int1.Main</mainClass>
</configuration>
</plugin>
</plugins>
</build>
</project>web.xml:
网页.xml：
<?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">
<!-- The definition of the Root Spring Container shared by all Servlets and Filters -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/root-context.xml</param-value>
</context-param>
<!-- Creates the Spring Container shared by all Servlets and Filters -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Processes application requests -->
<servlet>
<servlet-name>appServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring/appServlet/servlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>appServlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>servlet-context.xml :
servlet-context.xml ：
<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd
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">
<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
<!-- Enables the Spring MVC @Controller programming model -->
<annotation-driven/>
<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
<resources mapping="/resources/**" location="/resources/" />
<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<context:component-scan base-package="com.springapp.demo" />
</beans:beans>HomeController.java :
家庭控制器.java :
package com.springapp.demo;
import java.util.Locale;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
/**
* Handles requests for the application home page.
*/
@RequestMapping(value = "/")
@Controller
public class HomeController {
private static final Logger logger = LoggerFactory.getLogger(HomeController.class);
/**
* Simply selects the home view to render by returning its name.
*/
@RequestMapping(value = "/", method = RequestMethod.GET)
public String home(Locale locale, Model model) {
logger.info("Welcome home! The client locale is {}.", locale);
return "home";
}
@RequestMapping(value = "/user", method = RequestMethod.POST)
public String userInfo(Model model, @RequestParam(value="userName")String userName, @RequestParam(value="gender")String gender ) {
model.addAttribute("userName", userName);
model.addAttribute("gender", gender);
return "userInfo";
}
@RequestMapping(value = "/test", method = RequestMethod.GET)
public String test(Model model) {
return "test";
}
}Any ideas? Is there more info I need to provide? Thanks!
有任何想法吗？我需要提供更多信息吗？谢谢！
采纳答案by Alexey Malev
I think the behavior you see is expected one. Your HomeControllerclass doesn't have a mapping for /demoURI, only /user, /testand /.
我认为你看到的行为是预期的。您的HomeController课程没有/demoURI的映射，只有/user,/test和/。
UPD: After I have seen the question update, I concluded that you refer demoas a context descriptor and probably requesting it like
UPD：在我看到问题更新后，我得出结论，您将其demo称为上下文描述符，并且可能像这样请求它
http://localhost:8080/demo/test
http://localhost:8080/demo/test
If my assumption is correct, the most probable cause of your troubles is a mismatch of context descriptor you're using in browser and the one at which application is really deployed. You may want to try accessing it like
如果我的假设是正确的，那么您遇到麻烦的最可能原因是您在浏览器中使用的上下文描述符与实际部署应用程序的上下文描述符不匹配。您可能想尝试访问它
http://localhost:8080/test
http://localhost:8080/test
or
或者
http://localhost:8080/appServlet/test
http://localhost:8080/appServlet/test
If that works (i.e. return "test";is invoked) than this is the issue. If you want other application name then appServlet, you should take some actions that depend on application server you use, for example you may want to rename .warfile after build, or change IDE settings if you deploy for there, and so on.
如果这有效（即被return "test";调用），那么这就是问题所在。如果您想要其他应用程序名称，那么appServlet您应该根据您使用的应用程序服务器执行一些操作，例如您可能希望.war在构建后重命名文件，或者如果您在那里部署，则更改 IDE 设置，等等。
回答by Vardhini
You need to add the below mapping:
<!-- DispatcherServlet Context: defines this servlet's request-processing infrastructure -->
<!-- Enables the Spring MVC @Controller programming model -->
<mvc:resources mapping="/resources/**" location="/resources/" />
<mvc:resources mapping="/resources/**" location="/resources/" />
<mvc:annotation-driven />
<!-- Handles HTTP GET requests for /resources/** by efficiently serving up static resources in the ${webappRoot}/resources directory -->
<!-- <resources mapping="/resources/**" location="/resources/" /> -->
<!-- <mvc:resources mapping="/resources/**" location="/, classpath:/META-INF/public-web-resources/"/> -->
<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/WEB-INF/views/" />
<beans:property name="suffix" value=".jsp" />
</beans:bean>
<!-- View Handler -->
<beans:bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
<beans:property name="favorPathExtension" value="true"/>
<beans:property name="mediaTypes">
<beans:map>
<beans:entry key="xml" value="text/xml"/>
<beans:entry key="json" value="application/json"/>
<beans:entry key="html" value="text/html"/>
<beans:entry key="less" value="text/html"/>
</beans:map>
</beans:property>
<beans:property name="viewResolvers">
<beans:list>
<beans:bean class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<beans:property name="viewClass" value="org.springframework.web.servlet.view.tiles3.TilesView"/>
</beans:bean>
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<beans:property name="prefix" value="/"/>
</beans:bean>
</beans:list>
</beans:property>
</beans:bean>
回答by user2739823
You are trying to access /demo, but as I see in your Controller, there is no such URI Template. You have root "/", "/user" and "/test".
您正在尝试访问 /demo，但正如我在您的控制器中看到的那样，没有这样的 URI 模板。你有根“/”、“/user”和“/test”。
