SpringBoot 添加fastjson

1.先在项目中添加fastjson依赖：

<dependency>
	<groupId>com.alibaba</groupId>
	<artifactId>fastjson</artifactId>
	<version>${fastjson.version}</version>
</dependency>

2.1第一种方法，让入口类实现WebMvcConfigure接口，并重写configureMessageConverters方法：

public class App implements WebMvcConfigurer{
     ......  
}

重写方法：

public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
		//第一种配置fastJson方法
		FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
		FastJsonConfig fastJsonConfig = new FastJsonConfig();
		fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
		//处理中文乱码问题
        List<MediaType> fastMediaTypes = new ArrayList<MediaType>();
        fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        fastJsonHttpMessageConverter.setSupportedMediaTypes(fastMediaTypes);
        
		fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);
		converters.add(fastJsonHttpMessageConverter);
		
}

2.2第二种方法，直接在入口类加入@Bean注解并加入方法：

@Bean
public HttpMessageConverters fastJsonHttpMessage() {
		FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
		FastJsonConfig fastJsonConfig = new FastJsonConfig();
		fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
		//处理中文乱码问题
        List<MediaType> fastMediaTypes = new ArrayList<MediaType>();
        fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
        fastJsonHttpMessageConverter.setSupportedMediaTypes(fastMediaTypes);
        
		fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);
		return new HttpMessageConverters(fastJsonHttpMessageConverter);
}