在System模块的ConfigurerAdapter类中添加 解决Long 类型在 前端精度丢失的实现

eladmin-system/src/main/java/me/zhengjie/config/ConfigurerAdapter.java

 package me.zhengjie.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.Configuration;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.StringHttpMessageConverter;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
 import org.springframework.web.servlet.config.annotation.CorsRegistry;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
 import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import java.math.BigInteger;
+import java.nio.charset.Charset;
+import java.util.List;
 
 /**
  * WebMvcConfigurer
@@ -26,6 +35,25 @@ public class ConfigurerAdapter implements WebMvcConfigurer {
 
     }
 
+// 可解决Long 类型在 前端精度丢失的问题， 如不想全局 直接添加注解 @JsonSerialize(using= ToStringSerializer.class) 到相应的字段上
+
+//    @Override
+//    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
+//
+//        MappingJackson2HttpMessageConverter jackson2HttpMessageConverter =
+//                new MappingJackson2HttpMessageConverter();
+//
+//        ObjectMapper objectMapper = new ObjectMapper();
+//        SimpleModule simpleModule = new SimpleModule();
+//        simpleModule.addSerializer(BigInteger.class, ToStringSerializer.instance);
+//        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
+//        simpleModule.addSerializer(Long.TYPE, ToStringSerializer.instance);
+//        objectMapper.registerModule(simpleModule);
+//        jackson2HttpMessageConverter.setObjectMapper(objectMapper);
+//        converters.add(jackson2HttpMessageConverter);
+//        converters.add(new StringHttpMessageConverter(Charset.forName("UTF-8")));
+//    }
+
     @Override
     public void addResourceHandlers(ResourceHandlerRegistry registry) {
         registry.addResourceHandler("/**").addResourceLocations("classpath:/META-INF/resources/").setCachePeriod(0);

eladmin-system/src/main/java/me/zhengjie/modules/system/service/dto/DictDTO.java

 package me.zhengjie.modules.system.service.dto;
 
 import lombok.Data;
-import java.sql.Timestamp;
 import java.io.Serializable;
 
 /**