@Bean

    public ResourceConfig resourceConfig() {

        ResourceConfig resourceConfig = new ResourceConfig();

        // 用FastJson替换掉默认的Jackson

        resourceConfig.register(FastJsonResolver.class);

        resourceConfig.register(FastJsonFeature.class);

        return resourceConfig;

    }

    @Provider

    static class FastJsonResolver implements ContextResolver<FastJsonConfig> {

        // 用FastJson替换掉默认的Jackson

        public FastJsonConfig getContext(Class<?> type) {

            FastJsonConfig fastJsonConfig = new FastJsonConfig();

            return fastJsonConfig;

        }

    }