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  • 【随手记录】关于feign报UnsupportedOperationException错误

     

    前几天同事使用feign调API的时候报错:

    java.lang.UnsupportedOperationException
    at java.util.Collections$UnmodifiableCollection.add(Collections.java:1055)
    at org.springframework.cloud.openfeign.support.FeignUtils.addTemplateParameter(FeignUtils.java:60)
    at org.springframework.cloud.openfeign.support.SpringMvcContract$SimpleAnnotatedParameterContext.setTemplateParameter(SpringMvcContract.java:460)
    at org.springframework.cloud.openfeign.annotation.RequestParamParameterProcessor.processArgument(RequestParamParameterProcessor.java:69)
    at org.springframework.cloud.openfeign.support.SpringMvcContract.processAnnotationsOnParameter(SpringMvcContract.java:292)
    at feign.Contract$BaseContract.parseAndValidateMetadata(Contract.java:110)
    at org.springframework.cloud.openfeign.support.SpringMvcContract.parseAndValidateMetadata(SpringMvcContract.java:188)
    at feign.Contract$BaseContract.parseAndValidatateMetadata(Contract.java:66)
    at feign.ReflectiveFeign$ParseHandlersByName.apply(ReflectiveFeign.java:154)
    at feign.ReflectiveFeign.newInstance(ReflectiveFeign.java:52)
    at feign.Feign$Builder.target(Feign.java:251)
    at feign.Feign$Builder.target(Feign.java:247)
    at com.supermap.sinfcloud.common.feign.FeignService.newWebApiByName(FeignService.java:81)
    at com.supermap.sinfcloud.common.feign.FeignService.newWebApiByName(FeignService.java:71)

    原因就是在处理feign API参数时候,参数名称出现多个重复的,就会导致feign处理参数出错!

    @GetMapping("/test")
    Message<?> apply(@RequestParam("userName") String userName,@RequestParam("userName") String userId);

     还是少拷贝,仔细点好~

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  • 原文地址:https://www.cnblogs.com/whaleX/p/14095696.html
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