/*
 * Copyright (c) 2018  www.freemud.cn Inc. All rights reserved.
 * 注意：本内容仅限于上海非码科技内部传阅，禁止外泄以及用于其他的商业目
 */

package cn.freemud.config;

import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.math.BigInteger;
import java.util.ArrayList;
import java.util.List;
/**
 * WebMvcConfigurer
 */
@Configuration
public class WebMvcConfig implements WebMvcConfigurer {
    @Bean
    public ObjectMapper objectMapper(){
        ObjectMapper objectMapper = new ObjectMapper();

        //忽略未知属性
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
        SimpleModule simpleModule = new SimpleModule();


        //将Long,BigInteger序列化的时候,转化为String,否则会出现精度问题
        simpleModule.addSerializer(Long.class, com.fasterxml.jackson.databind.ser.std.ToStringSerializer.instance);
        simpleModule.addSerializer(Long.TYPE, com.fasterxml.jackson.databind.ser.std.ToStringSerializer.instance);
        simpleModule.addSerializer(BigInteger.class, com.fasterxml.jackson.databind.ser.std.ToStringSerializer.instance);

        objectMapper.registerModule(simpleModule);
        return objectMapper;
    }
//    @Bean
//    public HttpMessageConverter 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();
//
//        //过滤并修改配置返回内容
//        fastJsonConfig.setSerializerFeatures(
//                //List字段如果为null,输出为[],而非null
//                //SerializerFeature.WriteNullListAsEmpty,
//                //字符类型字段如果为null,输出为"",而非null
////                SerializerFeature.WriteNullStringAsEmpty,
//                //Boolean字段如果为null,输出为false,而非null
////                SerializerFeature.WriteNullBooleanAsFalse,
//                //SerializerFeature.WriteNullBooleanAsFalse,
//                //消除对同一对象循环引用的问题，默认为false（如果不配置有可能会进入死循环）
//                SerializerFeature.DisableCircularReferenceDetect,
//                SerializerFeature.PrettyFormat
//        );
//
//        //在转换器中添加配置信息
//        fastConverter.setFastJsonConfig(fastJsonConfig);
//        List<MediaType> supportedMediaTypes = new ArrayList<>();
//        supportedMediaTypes.add(MediaType.APPLICATION_JSON);
//        supportedMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
//        fastConverter.setSupportedMediaTypes(supportedMediaTypes);
//        return fastConverter;
//    }

    @Bean
    public MappingJackson2HttpMessageConverter getMappingJackson2HttpMessageConverter() {
        MappingJackson2HttpMessageConverter mappingJackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
        //设置中文编码格式
        List<MediaType> list = new ArrayList<MediaType>();
        list.add(MediaType.APPLICATION_JSON_UTF8);
        mappingJackson2HttpMessageConverter.setSupportedMediaTypes(list);
        return mappingJackson2HttpMessageConverter;
    }

}
