Java后端给前端传Long值精度丢失的问题与解决方法

[-2^53 + 1, 2^53 - 1] => [-9007199254740991, 9007199254740991]

{
  "id": 9223372036854775807
}

console.log(data.id); // 输出 9223372036854776000（精度已丢失）

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;

@Configuration
public class JacksonConfig {
    @Bean
    public ObjectMapper objectMapper() {
        ObjectMapper objectMapper = new ObjectMapper();
        SimpleModule simpleModule = new SimpleModule();
        // Long 和 long 全部转为字符串
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
        objectMapper.registerModule(simpleModule);
        return objectMapper;
    }
}

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

public class UserDTO {
    @JsonSerialize(using = ToStringSerializer.class)
    private Long id;

    // 其他字段...
}