dubbo改feign踩坑记录"/>
dubbo改feign踩坑记录
顺序不一定,看看记不记得着吧
修改背景:因为整体技术栈的修改,从原来的dubbo的接口调用,改为了feign
优点:都改为了http调用,公司各项目库之间不用冗余interface代码,改为springcloud技术栈,方便后期各种springcloud的组件接入
缺点:springcloud接触都不是很深,需要踩坑
直接开始吧
问题1:500-Request processing failed; nested exception is feign.codec.EncodeException: 'Content-Type' cannot contain wildcard type '*'
出问题的代码如下:
消费者controller:
@RequestMapping(value = "payout", method = RequestMethod.POST)@ApiOperation(value = "")public void payout() {String reqJson = "{\n" +"\t\"id\":1,\n" +"\t\"name\":\"路人甲\"" +"}";JSONObject result = paymentOuterService.pay(1, 20, JSONObject.parseObject(reqJson));System.out.println(result);}
feign接口:paymentOuterService
@FeignClient(value = "tradeCenter", path = "/payout")
public interface PaymentOuterService {@RequestMapping(value = "/pay", method = RequestMethod.POST)JSONObject pay( @RequestParam(value = "param1") Integer param1, @RequestParam(value = "param2") Integer param2, @RequestBody JSONObject obj);
}
服务提供方controller:
@RestController
@RequestMapping(value = "/payout")
@Api(tags = "TradeCenterController")
public class TradeCenterController{@RequestMapping(value = "pay", method = RequestMethod.POST)@ApiOperation(value = "支付")public JSONObject pay(@RequestParam(value = "param1") Integer param1, @RequestParam(value = "param2") Integer param2, @RequestBody JSONObject obj) {return new JSONObject();}
}
像上面这样,调用时候会出现:500-Request processing failed; nested exception is feign.codec.EncodeException: 'Content-Type' cannot contain wildcard type '*'
出现这个问题有几个原因:1、请求的参数中有不是基本类型的;2、不是基本类型,没有指定请求的格式
所以如果是基本类型请求参数就没问题
有两种修改方式:
第一种:
这种需要修改feign接口:
@FeignClient(value = "tradeCenter", path = "/payout")
public interface PaymentOuterService {@RequestMapping(value = "/pay", method = RequestMethod.POST,consumes = MediaType.APPLICATION_JSON_VALUE)JSONObject pay( @RequestParam(value = "param1") Integer param1, @RequestParam(value = "param2") Integer param2, @RequestBody JSONObject obj);
}
在@RequestMapping中增加:consumes = MediaType.APPLICATION_JSON_VALUE,指定请求的参数格式为:"application/json"
第二种:
重写fastjson的转换,在里面加上以下代码:
@Bean@ConditionalOnMissingBean({FastJsonHttpMessageConverter.class})public FastJsonHttpMessageConverter fastJsonHttpMessageConverter() {FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();List<MediaType> supportedMediaTypes = new ArrayList<>();supportedMediaTypes.add(MediaType.APPLICATION_JSON);supportedMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);supportedMediaTypes.add(MediaType.APPLICATION_ATOM_XML);supportedMediaTypes.add(MediaType.APPLICATION_FORM_URLENCODED);supportedMediaTypes.add(MediaType.APPLICATION_OCTET_STREAM);supportedMediaTypes.add(MediaType.APPLICATION_PDF);supportedMediaTypes.add(MediaType.APPLICATION_RSS_XML);supportedMediaTypes.add(MediaType.APPLICATION_XHTML_XML);supportedMediaTypes.add(MediaType.APPLICATION_XML);supportedMediaTypes.add(MediaType.IMAGE_GIF);supportedMediaTypes.add(MediaType.IMAGE_JPEG);supportedMediaTypes.add(MediaType.IMAGE_PNG);supportedMediaTypes.add(MediaType.TEXT_EVENT_STREAM);supportedMediaTypes.add(MediaType.TEXT_HTML);supportedMediaTypes.add(MediaType.TEXT_MARKDOWN);supportedMediaTypes.add(MediaType.TEXT_PLAIN);supportedMediaTypes.add(MediaType.TEXT_XML);converter.setSupportedMediaTypes(supportedMediaTypes);FastJsonConfig fastJsonConfig = new FastJsonConfig();JSON.DEFAULT_GENERATE_FEATURE |= SerializerFeature.DisableCircularReferenceDetect.getMask();fastJsonConfig.setSerializerFeatures(SerializerFeature.WriteMapNullValue,SerializerFeature.WriteNullListAsEmpty,SerializerFeature.WriteNullNumberAsZero,SerializerFeature.WriteNullBooleanAsFalse);converter.setFastJsonConfig(fastJsonConfig);return converter;}
问题2:
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