spring boot中使用FastJson解决long类型在js中失去精度

蔚落 2022-05-14 05:39 237阅读 0赞

## 1.pom中需要将默认的jackson排除掉 ##

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        <exclusions>
            
            <exclusion>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

## 2.利用fastJson替换掉jackson ##

package com.nightliar.bootdemo.config.spring;
    
    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 com.nightliar.bootdemo.interceptor.GlobalInterceptor;
    import com.nightliar.bootdemo.interceptor.LoginInterceptor;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.http.MediaType;
    import org.springframework.http.converter.HttpMessageConverter;
    import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
    import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
    
    import java.math.BigInteger;
    import java.util.ArrayList;
    import java.util.List;
    
    /** * Created by Nightliar * 2018-08-15 11:09 */
    @Configuration
    public class WebMvcConfig implements WebMvcConfigurer { 
    
        /** * 添加拦截器 */
        @Override
        public void addInterceptors(InterceptorRegistry registry){
            //全局拦截器
            registry.addInterceptor(new GlobalInterceptor())
                    .addPathPatterns("/**")
                    .excludePathPatterns("/static/**");
            //登陆拦截器
            registry.addInterceptor(new LoginInterceptor())
                    .addPathPatterns("/**")
                    .excludePathPatterns("/static/**");
        }
    
        /** * 利用fastJson替换掉jackson，且解决中文乱码问题 */
        @Override
        public void configureMessageConverters(List<HttpMessageConverter<?>> converters){
            FastJsonHttpMessageConverter fastConverter = new FastJsonHttpMessageConverter();
            FastJsonConfig fastJsonConfig = new FastJsonConfig();
            fastJsonConfig.setSerializerFeatures(
                    SerializerFeature.DisableCircularReferenceDetect,
                    SerializerFeature.WriteMapNullValue,
                    SerializerFeature.WriteNullNumberAsZero,
                    SerializerFeature.WriteNullStringAsEmpty,
                    SerializerFeature.WriteNullListAsEmpty,
                    SerializerFeature.WriteNullBooleanAsFalse,
                    SerializerFeature.WriteNonStringKeyAsString,
                    SerializerFeature.BrowserCompatible);
    
            //解决Long转json精度丢失的问题
            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);
    
            //处理中文乱码问题
            List<MediaType> fastMediaTypes = new ArrayList<>();
            fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
    
            fastConverter.setSupportedMediaTypes(fastMediaTypes);
            fastConverter.setFastJsonConfig(fastJsonConfig);
            converters.add(fastConverter);
        }
    
    }