spring boot 配置fastjson

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.15</version>
        </dependency>

@Bean
    public HttpMessageConverters fastjsonHttpMessageConverter(){
        //定义一个转换消息的对象
        FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();

        //添加fastjson的配置信息 比如 ：是否要格式化返回的json数据
        FastJsonConfig fastJsonConfig = new FastJsonConfig();

        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);

        //在转换器中添加配置信息
        fastConverter.setFastJsonConfig(fastJsonConfig);

        HttpMessageConverter<?> converter = fastConverter;

        return new HttpMessageConverters(converter);

    }