Spring Boot 2.0 + FastJson 1.2.+作为JSON序列化

SpringBoot配置FastJson的时候，报错：

1java.lang.IllegalArgumentException: Content-Type cannot contain wildcard type '*'
2	at org.springframework.util.Assert.isTrue(Assert.java:116) ~[spring-core-5.0.13.RELEASE.jar!/:5.0.13.RELEASE]
3	at org.springframework.http.HttpHeaders.setContentType(HttpHeaders.java:861) ~[spring-web-5.0.13.RELEASE.jar!/:5.0.13.RELEASE]
4	at org.springframework.http.converter.AbstractHttpMessageConverter.addDefaultHeaders(AbstractHttpMessageConverter.java:255) ~[spring-web-5.0.13.RELEASE.jar!/:5.0.13.RELEASE]
5	at org.springframework.http.converter.AbstractHttpMessageConverter.write(AbstractHttpMessageConverter.java:210) ~[spring-web-5.0.13.RELEASE.jar!/:5.0.13.RELEASE]
6	at com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter.write(FastJsonHttpMessageConverter.java:244) ~[fastjson-1.2.57.jar!/:?]
7

看FastJson初始化：

1public static final MediaType ALL = valueOf("*/*");
2public FastJsonHttpMessageConverter() {
3    super(MediaType.ALL);  // */*
4}

看来不能有通配符，所以需要像下面配置：

1@Bean
2public HttpMessageConverters fastJsonHttpMessageConverters() {
3    //创建FastJson信息转换对象
4    FastJsonHttpMessageConverter fastJsonHttpMessageConverter =
5            new FastJsonHttpMessageConverter();
6
7    List<MediaType> supportedMediaTypes = Lists.newArrayList();
8    //从1.1.41升级到1.2.之后的版本必须配置，否则会报错
9    supportedMediaTypes.add(MediaType.APPLICATION_JSON);
10    supportedMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
11    fastJsonHttpMessageConverter.setSupportedMediaTypes(supportedMediaTypes);
12
13    //创建FastJson对象并设定序列化规则
14    FastJsonConfig fastJsonConfig = new FastJsonConfig();
15    //添加自定义valueFilter
16    //规则赋予转换对象
17    fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);
18    StringHttpMessageConverter stringHttpMessageConverter =
19            new StringHttpMessageConverter(Charset.defaultCharset());
20
21    fastJsonConfig.setSerializerFeatures(
22            //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）
23            SerializerFeature.DisableCircularReferenceDetect,
24            //是否输出值为null的字段,默认为false
25            SerializerFeature.WriteMapNullValue
26    );
27
28    return new HttpMessageConverters(fastJsonHttpMessageConverter, stringHttpMessageConverter);
29}