SpringBoot 用fastjson替换到jackjson并解决中文乱码的问题

在入口类里面进行配置，入口类继承WebMvcConfigurerAdapter并重写configureMessageConverters方法，在方法里继承并修改fastjson的编码格式

package com.ljun;

import java.util.ArrayList;
import java.util.List;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;

@SpringBootApplication
public class App extends WebMvcConfigurerAdapter{

@Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
super.configureMessageConverters(converters);
//1.需要先定義一個convert轉換信息對象
FastJsonHttpMessageConverter fastJsonConverter = new FastJsonHttpMessageConverter();
//2.添加fastJson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);
//处理中文乱码问题
List<MediaType> fastMediaTypes = new ArrayList<>();
fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
fastJsonConverter.setSupportedMediaTypes(fastMediaTypes);
//3.在convert中添加配置信息
fastJsonConverter.setFastJsonConfig(fastJsonConfig);
//4.将converter添加到converters中
converters.add(fastJsonConverter);
}
/**
* 使用@Bean注入fastJsonMessageConverter
* @return
*/
// @Bean
// public HttpMessageConverter fastJsonMessageConverters() {
// //1.需要先定義一個convert轉換信息對象
// FastJsonHttpMessageConverter fastJsonHttpMessageConverter = new FastJsonHttpMessageConverter();
// //2.添加fastJson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);
// //3.在convert中添加配置信息
// fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig);
// //4.将converter添加到converters中
// HttpMessageConverter httpMessageConverter = fastJsonHttpMessageConverter;
// return httpMessageConverter;
// }

public static void main( String[] args ){
SpringApplication.run(App.class, args);
}