Spring Cloud Fegin 接口调用之类型转换异常处理_feign.codec.decodeexception

1. 调用方异常信息

feign.codec.DecodeException: 内部错误，请稍后再试
	at feign.InvocationContext.proceed(InvocationContext.java:40)
	at feign.AsyncResponseHandler.decode(AsyncResponseHandler.java:116)
	at feign.AsyncResponseHandler.handleResponse(AsyncResponseHandler.java:89)
	at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:141)
	at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:91)
	at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:100)
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2. 被调用方异常信息

Failed to convert value of type ‘java.lang.String’ to required type

org.springframework.web.method.annotation.MethodArgumentConversionNotSupportedException: Failed to convert value of type 'java.lang.String' to required type 'com.*.Xxx'; nested exception is java.lang.IllegalStateException: Cannot convert value of type 'java.lang.String' to required type 'com.*.Xxx': no matching editors or conversion strategy found
	at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:129)
	at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:122)
	at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:179)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:146)
	
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注1：目标类型 ‘com.*.Xxx’ 做了脱敏处理

3. 解决方案：增加类型转换器

@Configuration
public class StringToObjectConfiguration implements WebMvcConfigurer {

    @Override
    public void addFormatters(FormatterRegistry registry) {
        registry.addConverter(new JSONStringToObjectParamConverter());
    }
}
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