java采坑之路-fastjson

在springboot2.0中使用fastjson做转换器出现如下的问题：

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!/:?]

解决办法：

    /**
     * 修改默认的json序列化方式
     * @return
     */
    @Bean
    public HttpMessageConverters fastJsonHttpMessageConverters() {
        // 1.定义一个converters转换消息的对象
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
        // 2.添加fastjson的配置信息，比如: 是否需要格式化返回的json数据
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        // 3.在converter中添加配置信息
        fastConverter.setFastJsonConfig(fastJsonConfig);

        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);
        fastConverter.setSupportedMediaTypes(supportedMediaTypes);

        // 4.将converter赋值给HttpMessageConverter
        HttpMessageConverter<?> converter = fastConverter;
        // 5.返回HttpMessageConverters对象
        return new HttpMessageConverters(converter);
    }

参考：
1.https://my.oschina.net/u/3747772/blog/3061925