package com.luyang.cloud.com mon. Config; 

The import com. Alibaba. Fastjson. Serializer. SerializerFeature; 
The import com. Alibaba. Fastjson. Support. Config. FastJsonConfig; 
The import com. Alibaba. Fastjson. Support. Spring. FastJsonHttpMessageConverter; 
The import org. Springframework. Beans. Factory. The ObjectFactory; 
The import org. Springframework. Boot. Autoconfigure. HTTP. HttpMessageConverters; 
The import org. Springframework. Cloud. Openfeign. Support. ResponseEntityDecoder; 
The import org. Springframework. Cloud. Openfeign. Support. SpringDecoder; 
The import org. Springframework. Cloud. Openfeign. Support. SpringEncoder; 
The import org. Springframework. Context. The annotation. Bean; 
The import org. Springframework. HTTP. MediaType; 
The import org. Springframework. HTTP. Converter. HttpMessageConverter; 

Import the Java. Util. ArrayList; 
import java.util.List; 


Public class FeignConfig {

@ Bean 
Public ResponseEntityDecoder feignDecoder () {
HttpMessageConverter fastJsonConverter=createFastJsonConverter (); 
ObjectFactory The objectFactory=() - & gt; New HttpMessageConverters (fastJsonConverter); 
Return new ResponseEntityDecoder (new SpringDecoder (objectFactory)); 
} 

@ Bean 
Public SpringEncoder feignEncoder () {
HttpMessageConverter fastJsonConverter=createFastJsonConverter (); 
ObjectFactory The objectFactory=() - & gt; New HttpMessageConverters (fastJsonConverter); 
Return new SpringEncoder (objectFactory); 
} 

Private HttpMessageConverter createFastJsonConverter () {

//create fastJson message converter 
FastJsonHttpMessageConverter fastConverter=new FastJsonHttpMessageConverter (); 

//update the latest version to=============================================================
List SupportedMediaTypes=new ArrayList<> (a); 
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); 
FastConverter. SetSupportedMediaTypes (supportedMediaTypes); 

//create the configuration class 
FastJsonConfig FastJsonConfig=new FastJsonConfig (); 
//modify configuration returns the content filtering 
//WriteNullListAsEmpty: List fields if is null, the output of [], rather than the null 
//WriteNullStringAsEmpty: character type field if it is null, the output is "", rather than the null 
//DisableCircularReferenceDetect: to eliminate the problem of cyclic references to the same object, the default is false (if not configuration could be entering dead loop) 
//WriteNullBooleanAsFalse: if a Boolean field is null, the output is false, rather than the null 
//WriteMapNullValue: whether the output value is null fields, the default is false 
FastJsonConfig. SetSerializerFeatures (
SerializerFeature DisableCircularReferenceDetect, 
SerializerFeature. WriteMapNullValue 
); 
FastConverter. SetFastJsonConfig (fastJsonConfig); 

Return fastConverter; 
} 

Public @ Bean HttpMessageConverters fastJsonHttpMessageConverters () {
//define a convert converts message object 
FastJsonHttpMessageConverter fastConverter=new FastJsonHttpMessageConverter (); 
//add fastjson configuration information 
FastJsonConfig FastJsonConfig=new FastJsonConfig (); 
FastJsonConfig. SetSerializerFeatures (SerializerFeature. PrettyFormat); 
//configuration information is added in the convert 
FastConverter. SetFastJsonConfig (fastJsonConfig); 
//add the convert to the converters in 
HttpMessageConverter<?> The converter=fastConverter; 
Return new HttpMessageConverters (converter); 
} 
} 

Integration after using A service invoke service B B normal return data but A Null service receives data and error

 Java. Lang. IllegalArgumentException: Invalid characters (CR/LF) in the header WWW - Authenticate 
The at org. Springframework. Security. Web. Firewall. FirewalledResponse. ValidateCrlf (FirewalledResponse. Java: 73) ~ [spring ws-security - web - 5.1.7. The jar: 5.1.7. RELEASE] 
The at org. Springframework. Security. Web. Firewall. FirewalledResponse. AddHeader (FirewalledResponse. Java: 55) ~ [spring ws-security - web - 5.1.7. The jar: 5.1.7. RELEASE] 
The at javax.mail. Servlet. HTTP. HttpServletResponseWrapper. AddHeader (HttpServletResponseWrapper. Java: 177) ~ [javax.mail. Servlet - API - 4.0.1. Jar: 4.0.1] 
The at org. Springframework. Security. Web. Util. OnCommittedResponseWrapper. AddHeader (OnCommittedResponseWrapper. Java: 63) ~ [spring ws-security - web - 5.1.7. The jar: 5.1.7. RELEASE] 
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