Java org.springframework.web.servlet.DispatcherServlet noHandlerFound
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/26005483/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
org.springframework.web.servlet.DispatcherServlet noHandlerFound
提问by wonza
I get this error when accessing http://api:8080/userswhich 404's and I get this error in my console:
访问http://api:8080/userswhich 404时出现此错误，并且在控制台中出现此错误：
Sep 23, 2014 5:57:52 PM org.springframework.web.servlet.DispatcherServlet noHandlerFound WARNING: No mapping found for HTTP request with URI [/users] in DispatcherServlet with name 'dispatcher'
2014 年 9 月 23 日下午 5:57:52 org.springframework.web.servlet.DispatcherServlet noHandlerFound 警告：在名称为“dispatcher”的 DispatcherServlet 中找不到带有 URI [/users] 的 HTTP 请求的映射
When I access http://localhost:8080/api/usersI get a 404 in my browser but no error in my console
当我访问时http://localhost:8080/api/users，我的浏览器中出现 404，但我的控制台中没有错误
applicationContext.xml
应用上下文.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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
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.api"/>
</beans>
dispatcher-servlet.xml:
调度程序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:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
">
<context:component-scan base-package="com.api"/>
</beans>
web.xml:
网页.xml：
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
Users.java:
用户.java：
package com.api;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RequestMapping("/users")
public class Users {
@Autowired
public Users() {
}
@RequestMapping(method = RequestMethod.GET)
public void getUser() {
System.out.println("\nhere\n");
}
}
If anyone has any clue I'd greatly appreciate it. I've looked up several questions with the same error as I'm getting but common solution was to add which I have already, so I'm not sure what else to do. Thanks.
如果有人有任何线索，我将不胜感激。我查了几个问题与我遇到的错误相同，但常见的解决方案是添加我已经有的问题，所以我不确定还能做什么。谢谢。
EDIT: I've just updated all the code to what the latest reference doc, and I still get the same error. EDIT: Update to show my current state of files.
编辑：我刚刚将所有代码更新为最新的参考文档，但仍然出现相同的错误。编辑：更新以显示我当前的文件状态。
采纳答案by Dino Tw
change your web.xml to
将您的 web.xml 更改为
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
and dispatch-servlet.xml to
和 dispatch-servlet.xml 到
<?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:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">
<context:component-scan base-package="com.api"/>
</beans>
You don't need applicationContext.xml for your code to run
您不需要 applicationContext.xml 来运行您的代码
回答by Sam
Need to add the following lines in your spring-context.xml
需要在 spring-context.xml 中添加以下几行
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/view/" />
<property name="suffix" value=".jsp" />
</bean>
Note: property prefix and suffix need to modify based on your application like .jsp if you are using jsp files.
回答by Nandan
A common mistake is this Make sure the group id in pom.xml is the parent of that mentioned in
一个常见的错误是确保 pom.xml 中的组 ID 是在
</context:component-scan>
For Example
If Group Id-com.cavesofprogramming.spring.webthen
例如 If Group Id-com.cavesofprogramming.spring.webthen
<context:component-scan base- package="com.cavesofprogramming.spring.web.controllers">
The effect is that the controller is not found in the maven build and as a result the mapping not done to the correct jsp.
结果是在 maven 构建中找不到控制器，因此映射没有完成到正确的 jsp。
回答by Rahul
Cause - Main reason behind this issue is servlet.xml file is not able to find the proper controller that could redirect your request.
原因 - 此问题背后的主要原因是 servlet.xml 文件无法找到可以重定向您的请求的正确控制器。
Solution - Ensure few things:
解决方案 - 确保几件事：
In servlet.xml file your base-package should point to the correct path where the controller class resides.
@Controller should be mentioned over the controller class.
In controller class @RequestMapping value should be as same as the web.xml url-pattern parameter.
In controller class, ModelAndView returns .jsp page should be at the same path which is pointing in the servlet.xml prefix value of ViewResolver.
在 servlet.xml 文件中，您的基础包应该指向控制器类所在的正确路径。
@Controller 应该在控制器类中提及。
在控制器类中 @RequestMapping 值应该与 web.xml url-pattern 参数相同。
在控制器类中，ModelAndView 返回的 .jsp 页面应该在指向 ViewResolver 的 servlet.xml 前缀值的同一路径。
回答by iragond
I Have also faced the same problem
org.springframework.web.servlet.DispatcherServlet noHandlerFound
我也遇到了同样的问题
org.springframework.web.servlet.DispatcherServlet noHandlerFound
I am hitting different url in postman to solve this problem just check your postman which URL you hitting
我正在邮递员中点击不同的网址来解决这个问题，只需检查您的邮递员您点击的网址
回答by Jyot
After spending whole day i got to know the solution. When you create maven project, by default it doesn't create 'java' folder under 'javaResource/src/main', which is required to get the controller path.
花了一整天后，我才知道解决方案。当您创建 maven 项目时，默认情况下它不会在“javaResource/src/main”下创建“java”文件夹，这是获取控制器路径所必需的。
Make sure you create java folder first inside 'javaResource/src/main', then create your package and controller.
确保首先在“javaResource/src/main”中创建 java 文件夹，然后创建包和控制器。
Screenshot attached for reference.
附上截图供参考。
回答by menoktaokan
I just checked the servlet.xmlfile and solved the problem:
我刚刚检查了servlet.xml文件并解决了问题：
<context:component-scan base-package="com.YOURHOST" />
回答by mainaak
Here is how I got around this and what I was doing wrong.
这是我如何解决这个问题以及我做错了什么。
On creating a maven project with web archetype we do not have the java directory under main. You will have to create it manually and add a directory under it. This directory is the base-package that the servlet.xml wants.
在使用 web 原型创建 maven 项目时，我们在 main 下没有 java 目录。您必须手动创建它并在其下添加一个目录。该目录是 servlet.xml 所需的基本包。
servlet.xml and the location of the base-package image attached for reference
servlet.xml 和附加的基础包图像的位置以供参考
回答by Samuelhuckelson
I have faced similar issue while copying from one project to another. I missed to add the index.jsp
从一个项目复制到另一个项目时，我遇到了类似的问题。我错过了添加 index.jsp
Adding this resolved my issue. Hope it helps.
添加这个解决了我的问题。希望能帮助到你。
