Spring mvc 发现不明确的映射。无法映射控制器 bean 方法
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【中文标题】Spring mvc 发现不明确的映射。无法映射控制器 bean 方法【英文标题】：Spring mvc Ambiguous mapping found. Cannot map controller bean method 【发布时间】：2015-07-09 01:47:45 【问题描述】：我正在尝试构建一个应用程序，该应用程序可以列出数据库中的一些值，并在必要时使用 Spring 4 修改、添加、删除，我收到以下错误（仅当我的两个控制器文件，如果我从它可以工作的文件之一中删除注释，但我在控制台中收到一条消息“没有找到映射......在具有名称的调度程序servlet中......）：
INFO : org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping - Mapped "[/edit/id],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]" onto public java.lang.String com.bookReview.app.BookController.editBook(int,org.springframework.ui.Model)
WARN : org.springframework.web.context.support.XmlWebApplicationContext - Exception encountered during context initialization - cancelling refresh attempt
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0': Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping found. Cannot map 'reviewController' bean method
public java.lang.String com.bookReview.app.ReviewController.editReview(int,org.springframework.ui.Model)
to [/edit/id],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]: There is already 'bookController' bean method
public java.lang.String com.bookReview.app.BookController.editBook(int,org.springframework.ui.Model) mapped.
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4728)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5166)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1409)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1399)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalStateException: Ambiguous mapping found. Cannot map 'reviewController' bean method
public java.lang.String com.bookReview.app.ReviewController.editReview(int,org.springframework.ui.Model)
to [/edit/id],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]: There is already 'bookController' bean method
public java.lang.String com.bookReview.app.BookController.editBook(int,org.springframework.ui.Model) mapped.
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.registerHandlerMethod(AbstractHandlerMethodMapping.java:212)
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.detectHandlerMethods(AbstractHandlerMethodMapping.java:184)
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initHandlerMethods(AbstractHandlerMethodMapping.java:144)
at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.afterPropertiesSet(AbstractHandlerMethodMapping.java:123)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.afterPropertiesSet(RequestMappingHandlerMapping.java:126)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1633)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570)
... 21 more
这是我的 pom.xml 文件
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.bookReview.app</groupId>
<artifactId>BookReviewApp</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>BookReviewApp</name>
<description>review app</description>
<!-- <properties>
Generic properties
<java.version>1.8</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
Spring
<spring-framework.version>4.0.3.RELEASE</spring-framework.version>
Hibernate / JPA
<hibernate.version>4.3.5.Final</hibernate.version>
<hibernate.version>3.6.9.Final</hibernate.version>
Logging
<logback.version>1.0.13</logback.version>
<slf4j.version>1.7.5</slf4j.version>
</properties> -->
<dependencies>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.1.6.RELEASE</version>
<!-- Exclude Commons Logging in favor of SLF4j -->
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<!-- Hibernate -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>4.3.9.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.3.9.Final</version>
</dependency>
<!-- Apache Commons DBCP -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<!-- Spring ORM -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
<!-- AspectJ -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.8.5</version>
</dependency>
<!-- Logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.12</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>1.7.12</version>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.12</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>2.2.1-b03</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.7</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- Test -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.35</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>4.1.6.RELEASE</version>
</dependency>
</dependencies>
</project>
这是我的 web.xml 文件
<?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/app/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>servlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/app/servlet/sevlet-context.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>servlet</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
这是我的 sevlet-context.xml 文件
<?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:mvc="http://www.springframework.org/schema/mvc" xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
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
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.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>
<beans:bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<beans:property name="driverClassName" value="com.mysql.jdbc.Driver" />
<beans:property name="url"
value="jdbc:mysql://localhost:3306/test" />
<beans:property name="username" value="serban" />
<beans:property name="password" value="serban" />
</beans:bean>
<!-- Hibernate 4 SessionFactory Bean definition -->
<beans:bean id="hibernate4AnnotatedSessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<beans:property name="dataSource" ref="dataSource" />
<beans:property name="annotatedClasses">
<beans:list>
<beans:value>com.bookReview.app.model.book</beans:value>
<beans:value>com.bookReview.app.model.review</beans:value>
</beans:list>
</beans:property>
<beans:property name="hibernateProperties">
<beans:props>
<beans:prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect
</beans:prop>
<beans:prop key="hibernate.show_sql">true</beans:prop>
</beans:props>
</beans:property>
</beans:bean>
<beans:bean id="bookDAO" class="com.bookReview.app.dao.bookDAOImpl">
<beans:property name="sessionFactory" ref="hibernate4AnnotatedSessionFactory" />
</beans:bean>
<beans:bean id="bookService" class="com.bookReview.app.service.BookServiceImpl">
<beans:property name="bookDAO" ref="bookDAO"></beans:property>
</beans:bean>
<beans:bean id="reviewDAO" class="com.bookReview.app.dao.reviewDAOImpl">
<beans:property name="sessionFactory" ref="hibernate4AnnotatedSessionFactory" />
</beans:bean>
<beans:bean id="reviewService" class="com.bookReview.app.service.ReviewServiceImpl">
<beans:property name="reviewDAO" ref="reviewDAO"></beans:property>
</beans:bean>
<!-- <default-servlet-handler/> -->
<context:component-scan base-package="com.bookReview.app" />
<tx:annotation-driven transaction-manager="transactionManager"/>
<beans:bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<beans:property name="sessionFactory" ref="hibernate4AnnotatedSessionFactory" />
</beans:bean>
</beans:beans>
这是我的 BookController.java 文件
package com.bookReview.app;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.bookReview.app.model.book;
import com.bookReview.app.service.BookService;
@Controller
public class BookController
private BookService bookService;
@Autowired(required=true)
@Qualifier(value="bookService")
public void setBookService(BookService bs)
this.bookService = bs;
@RequestMapping(value = "/books", method = RequestMethod.GET)
public String listBooks(Model model)
model.addAttribute("book", new book());
model.addAttribute("listBooks", this.bookService.listBooks());
return "book";
//For add and update book both
@RequestMapping(value= "/book/add", method = RequestMethod.POST)
public String addBook(@ModelAttribute("book") book b)
if(b.getBookid() == 0)
//new book, add it
this.bookService.addBook(b);
else
//existing book, call update
this.bookService.updateBook(b);
return "redirect:/books";
@RequestMapping("/remove/id")
public String removeBook(@PathVariable("id") int id)
this.bookService.removeBook(id);
return "redirect:/books";
@RequestMapping("/edit/id")
public String editBook(@PathVariable("id") int id, Model model)
model.addAttribute("book", this.bookService.getBookById(id));
model.addAttribute("listBooks", this.bookService.listBooks());
return "book";
这是我的 ReviewController.java 文件
package com.bookReview.app;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.bookReview.app.model.review;
import com.bookReview.app.service.ReviewService;
@Controller
public class ReviewController
private ReviewService reviewService;
@Autowired(required=true)
@Qualifier(value="reviewService")
public void setReviewService(ReviewService rs)
this.reviewService = rs;
@RequestMapping(value = "/reviews", method = RequestMethod.GET)
public String listReviews(Model model)
model.addAttribute("book", new review());
model.addAttribute("listReviews", this.reviewService.listReviews());
return "review";
//For add and update review both
@RequestMapping(value= "/review/add", method = RequestMethod.POST)
public String addReview(@ModelAttribute("review") review r)
if(r.getId() == 0)
//new review, add it
this.reviewService.addReview(r);
else
//existing review, call update
this.reviewService.updateReview(r);
return "redirect:/reviews";
@RequestMapping("/remove/id")
public String removeReview(@PathVariable("id") int id)
this.reviewService.removeReview(id);
return "redirect:/reviews";
@RequestMapping("/edit/id")
public String editReview(@PathVariable("id") int id, Model model)
model.addAttribute("review", this.reviewService.getReviewById(id));
model.addAttribute("listReviews", this.reviewService.listReviews());
return "review";
谢谢
【问题讨论】：
哇。这是很多代码。你确定这是minimal complete verifiable example，强调最小？创建一个最小的示例可以帮助其他人更快地识别您的错误，也可以帮助您自己找到问题。 对不起，我试图提供尽可能多的信息，以便更容易地追踪问题。如果您注意 pom、web 和 servlet 上下文 xml 文件是必要的，因为可能存在错误，除此之外，您可以找到同样重要的错误日志和两个类文件，我可以将它们以完整格式放置，因为问题出在这两个文件的底部。还是谢谢 当我收到这个错误时，是因为我正在将 Spring Boot 升级到更新的版本。我不得不为控制器删除预先存在的“@Bean”，因为“@RestController”注释让 spring 已经创建了它！ 【参考方案1】：你应该写
@Controller("/review")
public class ReviewController
和
@Controller("/book")
public class BookController
因为在您的代码中，您有两种方法没有明确/唯一的映射路径（例如，如果我们有一个调用 /edit/1 ，则不可能从您的 editBook BookController 或 @987654324 清楚地确定控制器的方法@)
【讨论】：
非常感谢这是问题所在，首先我将 ReviewController 的“编辑”和“删除”的名称修改为“编辑评论”和“删除评论”，我不能t 将@Controller 更改为@Controller(/book) 所以我使用了@Controller(value="book")，我希望它是正确的。也许这是一个不同的春季版本。现在我只有控制台消息：No mapping found for HTTP request with URI [/BookReviewApp/] in DispatcherServlet with name 'servlet' 我不知道它是否与这个问题有关【参考方案2】：如果问题是关于模棱两可的方法，可能@RequestMapping 应该是问题所在。
从 @RequestMapping(name =...) 更改为 @RequestMapping(value =...)
@RequestMapping(name = "xxx.htm", method = RequestMethod.GET)
到
@RequestMapping(value = "xxx.htm", method = RequestMethod.GET)
【讨论】：
这个答案是我在使用spring boot框架时对上述问题的解决方案。谢谢！【参考方案3】：对我来说，在@RequestMapping 中添加“params”属性如图所示
@ResponseBody
@RequestMapping(method = RequestMethod.GET, params = "id")
public User getUserById(final @RequestParam(name="id", required = true) String Id)
throws InvalidArgumentException
return userService.getUserById(UUID.fromString(Id));
/**
* REST service endpoint.
* @param name Unique name for the user in the system.
* @return Object of type @link User if exists otherwise null.
*/
@ResponseBody
@RequestMapping(method = RequestMethod.GET, params = "name")
public User getUserByName(final @RequestParam(name="name", required = true) String name)
throws InvalidArgumentException
return userService.getUserByName(name);
但是，在查询字符串中同时添加两个参数会给出 500 错误消息：
为 HTTP 路径映射的不明确的处理程序方法
在这种情况下，您可以使用另一种控制器方法同时获取两个参数，但只使用其中一个，我认为这是不必要的。
【讨论】：
【参考方案4】：在我的例子中，我在 Spring Boot 应用程序的两个不同控制器中有两种方法，两者都具有相同的
@DeleteMapping("/detailbonadelete/id") // delete，我将其中一个更改为@DeleteMapping("/bonadelete/id") // delete，它可以工作。
如果你有同样的事情：
@PutMapping("/detailbonaupdate/id") // update
@PostMapping("/detailbonainsert") // insert
@GetMapping("/detailbonaidbon/idBona") // selectByBonaId
确保每个控制器都是唯一的。
【讨论】：
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