springboot报错Error creating bean with namerequestMappingHandlerMapping defined in class path resource_error creating bean with name 'requestmappinghandl-优快云博客

本文链接：https://blog.youkuaiyun.com/woschengxuyuan/article/details/130301735

文章讲述了在SpringBoot项目启动时遇到的BeanCreationException错误，原因是Controller中的@RequestMapping映射冲突。作者提醒应遵循RESTful风格，并提供了修改@RequestMapping注解的方法来解决这个问题。通过将添加方法改为@PostMapping，获取所有数据的方法改为@GetMapping，解决了URL冲突。

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启动springboot项目时报错
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'requestMappingHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'deptConsumerController' method com.jiazhong.springcloud.controller.DeptConsumerController#getAll() to { [/consumer/dept/]}: There is already 'deptConsumerController' bean method com.jiazhong.springcloud.controller.DeptConsumerController#add(Dept) mapped.

路径冲突问题
产生此错误的原因是因为我写消费者Controller时，没注意RESTFUL风的写法…

解决办法

① 修改url
② 修改RequestMapper的method

因为是Restful风格，此处对dept做出处理，不能随意修改不符合Restful风格的url，将@RequestMapper改为对应的@GetMapper或@PostMapping即可

改之前

   @RequestMapping("/")
    public Result add(Dept dept){
        try {
            restTemplate.postForObject(REST_URL_PREFIX+"/dept/add",dept,Result.class);
            return Result.success("数据添加成功");
        } catch (RestClientException e) {
            e.printStackTrace();
            return Result.fail(500,"数据添加失败!!!");
        }
    }

    @RequestMapping("/")
    public List<Dept> getAll(){
        return restTemplate.getForObject(REST_URL_PREFIX+"/dept/",List.class);
    }

改之后

    @PostMapping("/")
    public Result add(@RequestBody Dept dept){
        try {
            restTemplate.postForObject(REST_URL_PREFIX+"/dept/",dept,Result.class);
            return Result.success("数据添加成功");
        } catch (RestClientException e) {
            e.printStackTrace();
            return Result.fail(500,"数据添加失败!!!");
        }
    }

    @GetMapping("/")
    public List<Dept> getAll(){
        return restTemplate.getForObject(REST_URL_PREFIX+"/dept/",List.class);
    }