SpringBoot配置FastJson的时候，报错：
java.lang.IllegalArgumentException: Content-Type cannot contain wildcard type '*' at org.springframework.util.Assert.isTrue(Assert.java:116) ~[spring-core-5.0.13.RELEASE.jar!/:5.0.13.RELEASE] at org.springframework.http.HttpHeaders.setContentType(HttpHeaders.java:861) ~[spring-web-5.0.13.RELEASE.jar!/:5.0.13.RELEASE] at org.springframework.http.converter.AbstractHttpMessageConverter.addDefaultHeaders(AbstractHttpMessageConverter.java:255) ~[spring-web-5.0.13.RELEASE.jar!/:5.0.13.RELEASE] at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:210) ~[spring-web-5.0.13.RELEASE.jar!/:5.0.13.RELEASE] at com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter.write(FastJsonHttpMessageConverter.java:244) ~[fastjson-1.2.57.jar!/:?]
看FastJson初始化：
public static final MediaType ALL = valueOf("*/*"); public FastJsonHttpMessageConverter() { super(MediaType.ALL); // */* }
看来不能有通配符，所以需要像下面配置：
@Bean public HttpMessageConverters fastJsonHttpMessageConverters() { //创建FastJson信息转换对象 FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter(); List<MediaType> supportedMediaTypes = Lists.newArrayList(); //从1.1.41升级到1.2.之后的版本必须配置，否则会报错 supportedMediaTypes.add(MediaType.APPLICATION_JSON); supportedMediaTypes.add(MediaType.APPLICATION_JSON_UTF8); fastJsonHttpMessageConverter.setSupportedMediaTypes(supportedMediaTypes); //创建FastJson对象并设定序列化规则 FastJsonConfig fastJsonConfig = new FastJsonConfig(); //添加自定义valueFilter //规则赋予转换对象 fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig); StringHttpMessageConverter stringHttpMessageConverter = new StringHttpMessageConverter(Charset.defaultCharset()); fastJsonConfig.setSerializerFeatures( //消除对同一对象循环引用的问题，默认为false（如果不配置有可能会进入死循环） SerializerFeature.DisableCircularReferenceDetect, //是否输出值为null的字段,默认为false SerializerFeature.WriteMapNullValue ); return new HttpMessageConverters(fastJsonHttpMessageConverter, stringHttpMessageConverter); }
