原因：java.lang.IllegalStateException:找到不明确的映射。无法映射'；appController'；bean方法

大家早上好，我正在处理一个我无法解码的模糊映射。。。 我正在使用SpringMVC4.0.6和Hibernate4.3.6 在tomcat中发动战争时，我遇到了以下错误：

ERROR [localhost-startStop-2]: Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping found. Cannot map 'appController' bean method 
public java.lang.String it.besmart.controller.AppController.newClient(org.springframework.ui.ModelMap)
to {[//new],methods=[POST],params=[],headers=[],consumes=[],produces=[],custom=[]}: There is already 'appController' bean method
public java.lang.String it.besmart.controller.AppController.saveClient(it.besmart.models.Client,org.springframework.validation.BindingResult,org.springframework.ui.ModelMap) mapped.
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1553)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:539)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4727)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5167)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:945)
    at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1768)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.IllegalStateException: Ambiguous mapping found. Cannot map 'appController' bean method 
public java.lang.String it.besmart.controller.AppController.newClient(org.springframework.ui.ModelMap)
to {[//new],methods=[POST],params=[],headers=[],consumes=[],produces=[],custom=[]}: There is already 'appController' bean method
public java.lang.String it.besmart.controller.AppController.saveClient(it.besmart.models.Client,org.springframework.validation.BindingResult,org.springframework.ui.ModelMap) mapped.
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.registerHandlerMethod(AbstractHandlerMethodMapping.java:192)
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.detectHandlerMethods(AbstractHandlerMethodMapping.java:164)
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.initHandlerMethods(AbstractHandlerMethodMapping.java:124)
    at org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.afterPropertiesSet(AbstractHandlerMethodMapping.java:103)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping.afterPropertiesSet(RequestMappingHandlerMapping.java:126)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1612)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1549)
    ... 25 more

我不明白为什么我会犯这个错误。AppController非常直截了当

package it.besmart.controller;
import it.besmart.models.Client;
import it.besmart.service.ClientService;
import java.util.List;
import java.util.Locale;
import javax.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.MessageSource;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping("/")
public class AppController {

    @Autowired
    ClientService clientService;

    @Autowired
    MessageSource messageSource;

    @RequestMapping(value = { "/", "/list" }, method = RequestMethod.GET)
    public String listClients(ModelMap model){
        List<Client> clients = clientService.findAllClients();
        model.addAttribute("clients", clients);
        return "allclients";
    }

    @RequestMapping(value = {"/new"}, method = RequestMethod.POST)
    public String newClient(ModelMap model){
        Client client = new Client();
        model.addAttribute("client", client);
        model.addAttribute("edit", false);
        return "registration";

    }

    @RequestMapping(value = {"/new"}, method = RequestMethod.POST)
    public String saveClient(@Valid Client client, BindingResult result, ModelMap model){
        if(result.hasErrors()){
            return "registration";
        }


        clientService.saveClient(client);
        model.addAttribute("success", "Client" + client.getNomeClient() + "registrato correttamente");

        return "success";

    }


    @RequestMapping(value = { "/edit-{name}-client"}, method = RequestMethod.POST)
    public String updateClient(@Valid Client client, BindingResult result, ModelMap model, @PathVariable String name ){
        if(result.hasErrors()){
            return "registration";
        }

        if(!clientService.isClientNameUnique(client.getIdClient(), client.getNomeClient())){
            FieldError idErr = new FieldError("client", "name", messageSource.getMessage("non.unique.nome_client", new String[]{client.getNomeClient()}, Locale.getDefault()));
            result.addError(idErr);
            return "registration";
        }
        clientService.saveClient(client);
        model.addAttribute("success", "Client" + client.getNomeClient() + "aggiornato correttamente");

        return "success";

    }

    @RequestMapping(value = { "/delete-{id}-client" }, method = RequestMethod.GET)
        public String deleteClient(@PathVariable int id){
        clientService.deleteClientById(id);
        return "redirect:/list";
    }


    }

package it.besmart.controller；
导入it.besmart.models.Client；
导入it.besmart.service.ClientService；
导入java.util.List；
导入java.util.Locale；
导入javax.validation.Valid；
导入org.springframework.beans.factory.annotation.Autowired；
导入org.springframework.context.MessageSource；
导入org.springframework.stereotype.Controller；
导入org.springframework.ui.ModelMap；
导入org.springframework.validation.BindingResult；
导入org.springframework.validation.FieldError；
导入org.springframework.web.bind.annotation.PathVariable；
导入org.springframework.web.bind.annotation.RequestMapping；
导入org.springframework.web.bind.annotation.RequestMethod；
@控制器
@请求映射（“/”）
公共类AppController{
@自动连线
客户服务客户服务；
@自动连线
消息源消息源；
@RequestMapping（值={”/“，“/list”}，方法=RequestMethod.GET）
公共字符串ListClient（ModelMap模型）{
List clients=clientService.findAllClients（）；
model.addAttribute（“客户机”，客户机）；
返回“所有客户端”；
}
@RequestMapping（值={“/new”}，方法=RequestMethod.POST）
公共字符串newClient（ModelMap模型）{
客户端=新客户端（）；
model.addAttribute（“客户机”，客户机）；
model.addAttribute（“编辑”，false）；
返回“注册”；
}
@RequestMapping（值={“/new”}，方法=RequestMethod.POST）
公共字符串saveClient（@Valid Client-Client，BindingResult，ModelMap-model）{
if（result.hasErrors（））{
返回“注册”；
}
clientService.saveClient（客户端）；
model.addAttribute（“success”，“Client”+Client.getNomeClient（）+“registrato corretmante”）；
返回“成功”；
}
@RequestMapping（值={/edit-{name}-client}，方法=RequestMethod.POST）
公共字符串updateClient（@Valid Client Client，BindingResult，ModelMap model，@PathVariable String name）{
if（result.hasErrors（））{
返回“注册”；
}
如果（！clientService.isClientNameUnique（client.getIdClient（），client.getNomeClient（）））{
FieldError idErr=newfielderror（“客户端”，“名称”，messageSource.getMessage（“非唯一的.nome_客户端”，新字符串[]{client.getNomeClient（）}，Locale.getDefault（）））；
结果.加法器（idErr）；
返回“注册”；
}
clientService.saveClient（客户端）；
model.addAttribute（“success”，“Client”+Client.getNomeClient（）+“aggiornato corretmente”）；
返回“成功”；
}
@RequestMapping（值={“/delete-{id}-client”}，方法=RequestMethod.GET）
公共字符串deleteClient（@PathVariable int-id）{
clientService.deleteClientById（id）；
返回“重定向：/list”；
}
}

ClientService.java

package it.besmart.service;

import it.besmart.models.Client;

import java.util.List;

public interface ClientService {

    Client findById(int id);

    void saveClient(Client client);

    void updateClient(Client client);

    void deleteClientById(int id);

    List <Client> findAllClients();

    Client findClientByName(String name);

    boolean isClientNameUnique(Integer id, String name);

}

打包it.besmart.service；
导入it.besmart.models.Client；
导入java.util.List；
公共接口客户端服务{
客户端findById（int-id）；
作废储蓄客户（客户）；
无效更新客户端（客户端）；
void deleteClientById（int id）；
列出FindAllClient（）；
客户端findClientByName（字符串名称）；
布尔值isClientNameUnique（整数id、字符串名称）；
}

在我看来，一切都很简单。。。我不太熟悉这种应用程序。。

---

谢谢

这是您收到的错误消息：

发现不明确的映射。无法映射“appController”bean方法 public java.lang.String it.besmart.controller.AppController.newClient（org.springframework.ui.ModelMap） 到{[//new]，methods=[POST]，params=[]，headers=[]，consumes=[]，products=[]，custom=[]}：已经映射了'appController'bean方法public java.lang.String it.besmart.controller.appController.saveClient（it.besmart.models.Client，org.springframework.validation.BindingResult，org.springframework.ui.ModelMap）

它告诉您，您正在映射多个方法来处理

POST

到URL

/new

。如果web浏览器向URL发出

POST

请求

/new

，您应该使用哪种方法处理该请求

以下是两种令人不快的方法：

    @RequestMapping(value = {"/new"}, method = RequestMethod.POST)
    public String newClient(ModelMap model){
        Client client = new Client();
        model.addAttribute("client", client);
        model.addAttribute("edit", false);
        return "registration";

    }

    @RequestMapping(value = {"/new"}, method = RequestMethod.POST)
    public String saveClient(@Valid Client client, BindingResult result, ModelMap model){
        if(result.hasErrors()){
            return "registration";
        }


        clientService.saveClient(client);
        model.addAttribute("success", "Client" + client.getNomeClient() + "registrato correttamente");

        return "success";

    }

---

我怀疑第一个是不正确的；你可能想使用

RequestMethod.GET

而不是

RequestMethod.POST

。

这与本文报道的问题无关，但因为这是谷歌在这个问题上最热门的搜索。我还想提到发生此问题的另一个原因是，当您将控制器方法标记为私有时（这种情况发生在我身上，因为我对方法使用IDE自动完成）

@RequestMapping（value=“/products”，method=RequestMethod.POST）
私有列表getProducts（）{
return productService.getProducts（）；
}

---

公开应该可以解决这个问题

当Tomcat的

Tomcat 8.0\work\Catalina\localhost\

未正确清除时，也有相同的错误。必须手动删除，重新启动Tomcat，然后应用程序无错误运行。

将参数添加到以下代码中，您就可以开始了

@RequestMapping(value = {"/new"}, method = RequestMethod.POST, params = "filter")
public String saveClient(@PathVariable("filter") final String filter,@Valid Client client, BindingResult result, ModelMap model){
    if(result.hasErrors()){
        return "registration";
    }


    clientService.saveClient(client);
    model.addAttribute("success", "Client" + client.getNomeClient() + "registrato correttamente");

    return "success";

}

• 记住向url提供参数，例如或 根据url配置相应地更改控制器方法

---

在我的例子中，我在错误中找不到一个方法。服务器没有被更新。尝试清理和重建。如果使用intellij，请删除[project dir]/target文件夹

@RequestMapping(value = {"/new"}, method = RequestMethod.POST)
public String newClient(ModelMap model)

@RequestMapping(value = {"/new"}, method = RequestMethod.POST)
public String saveClient(@Valid Client client, BindingResult result, ModelMap)

---

尝试概括这一部分。可能是相同的值导致了请求映射的模糊性。

我遇到了这个问题，并通过将

name

替换为

value

I解决了这个问题

@RequestMapping(value = {"/new"}, method = RequestMethod.POST)
public String newClient(ModelMap model)

@RequestMapping(value = {"/new"}, method = RequestMethod.POST)
public String saveClient(@Valid Client client, BindingResult result, ModelMap)

@PostMapping(name = "/greetings/sayHi")
public Object sayHi() {

  return "Hello";
}

@PostMapping(value = "/greetings/sayHi")
public Object sayHi() {
    
  return "Hello";
}