问题：雪花算法得到的ID较长，传到前端后，精度丢失，导致更新、删除功能不可用！

解决办法：

1、通过添加注解的方式，将Long类型转成String，再传给前端；

@JsonSerialize(using= ToStringSerializer.class)

private Long id;

2、方法二统一配置：

package com.jiawa.wiki.config;

import com.fasterxml.jackson.databind.ObjectMapper;

import com.fasterxml.jackson.databind.module.SimpleModule;

import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;

/**

• 统一注解，解决前后端交互Long类型精度丢失的问题

*/

@Configuration

public class JacksonConfig {

@Bean

public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder) {

ObjectMapper objectMapper = builder.createXmlMapper(false).build();

//全局配置序列化返回json处理

SimpleModule simpleModule = new SimpleModule();

//json Long ==>String

simpleModule.addSerializer(Long.class, ToStringSerializer.instance);

objectMapper.registerModule(simpleModule);

return objectMapper;

}

}