Long类型精度丢失解决方案

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http://riun.xyz

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使用fastjson解析json数据

	
        <dependency>
            <groupId>com.alibabagroupId>
            <artifactId>fastjsonartifactId>
            <version>1.2.33version>
        dependency>

SpringBoot中注入解析框架

package hx.insist.demo;

import com.alibaba.fastjson.serializer.SerializeConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.alibaba.fastjson.serializer.ToStringSerializer;
import com.alibaba.fastjson.support.config.FastJsonConfig;
import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.context.annotation.Bean;
import org.springframework.http.converter.HttpMessageConverter;

import java.math.BigInteger;

@MapperScan("hx.insist.demo.mapper")
@SpringBootApplication
public class DemoApplication {

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


    /**
     * 使用@Bean注解注入第三方的解析框架（fastJson）
     */
    @Bean
    public HttpMessageConverters fastHttpMessageConverters() {
        FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter();

        //配置
        FastJsonConfig fastJsonConfig = new FastJsonConfig();
        fastJsonConfig.setSerializerFeatures(SerializerFeature.PrettyFormat);
        //解决Long精度丢失问题
        SerializeConfig serializeConfig = SerializeConfig.globalInstance;
        serializeConfig.put(BigInteger.class, ToStringSerializer.instance);
        serializeConfig.put(Long.class, ToStringSerializer.instance);
        serializeConfig.put(Long.TYPE, ToStringSerializer.instance);
        fastJsonConfig.setSerializeConfig(serializeConfig);

        //配置setter
        converter.setFastJsonConfig(fastJsonConfig);
        HttpMessageConverter<?> converter2 = converter;
        return new HttpMessageConverters(converter2);
    }

}