关于springmvc 返回long类型数据前台丢失精度的问题

 1 import com.fasterxml.jackson.databind.ObjectMapper;
 2 import com.fasterxml.jackson.databind.module.SimpleModule;
 3 import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
 4 import org.springframework.context.annotation.Configuration;
 5 import org.springframework.http.converter.HttpMessageConverter;
 6 import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
 7 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 8 
 9 import java.util.List;
10 
11 @Configuration
12 public class MvcConfig implements WebMvcConfigurer {
13     @Override
14     public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
15         MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
16 
17         ObjectMapper objectMapper = new ObjectMapper();
18         /**
19          * 序列换成json时,将所有的long变成string
20          * 因为js中得数字类型不能包含所有的java long值
21          */
22         SimpleModule simpleModule = new SimpleModule();
23         simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
24         simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
25         objectMapper.registerModule(simpleModule);
26 
27         jackson2HttpMessageConverter.setObjectMapper(objectMapper);
28         converters.add(0,jackson2HttpMessageConverter);
29     }
30 }