fix

mec-im/src/main/java/com/ym/SealClassConfiguration.java

@@ -61,7 +61,7 @@ public class SealClassConfiguration {
                 supportedMediaTypes.add(MediaType.MULTIPART_FORM_DATA);
                 converter.setSupportedMediaTypes(supportedMediaTypes);
                 FastJsonConfig fastJsonConfig = new FastJsonConfig();
-                fastJsonConfig.setSerializerFeatures(SerializerFeature.WriteMapNullValue, SerializerFeature.PrettyFormat);
+                fastJsonConfig.setSerializerFeatures(SerializerFeature.WriteMapNullValue, SerializerFeature.PrettyFormat, SerializerFeature.DisableCircularReferenceDetect);
                 converter.setFastJsonConfig(fastJsonConfig);
                 converters.add(converter);
             }

mec-student/src/main/java/com/ym/mec/student/config/WebMvcConfig.java

@@ -1,5 +1,7 @@
 package com.ym.mec.student.config;
 
+import com.alibaba.fastjson.serializer.SerializerFeature;
+import com.alibaba.fastjson.support.config.FastJsonConfig;
 import com.ym.mec.common.config.EnumConverterFactory;
 import com.ym.mec.common.config.LocalFastJsonHttpMessageConverter;
 import com.ym.mec.student.interceptor.MDCInterceptor;
@@ -54,6 +56,11 @@ public class WebMvcConfig implements WebMvcConfigurer {
 		List<MediaType> fastMediaTypes = new ArrayList<MediaType>();
 		fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
 		converter.setSupportedMediaTypes(fastMediaTypes);
+
+		FastJsonConfig fastJsonConfig = new FastJsonConfig();
+		fastJsonConfig.setSerializerFeatures(SerializerFeature.WriteMapNullValue, SerializerFeature.PrettyFormat, SerializerFeature.DisableCircularReferenceDetect);
+		converter.setFastJsonConfig(fastJsonConfig);
+
 		return new HttpMessageConverters(converter);
 	}
 }

mec-teacher/src/main/java/com/ym/mec/teacher/config/WebMvcConfig.java

@@ -1,5 +1,7 @@
 package com.ym.mec.teacher.config;
 
+import com.alibaba.fastjson.serializer.SerializerFeature;
+import com.alibaba.fastjson.support.config.FastJsonConfig;
 import com.ym.mec.common.config.EnumConverterFactory;
 import com.ym.mec.common.config.LocalFastJsonHttpMessageConverter;
 import com.ym.mec.teacher.interceptor.MDCInterceptor;
@@ -54,6 +56,11 @@ public class WebMvcConfig implements WebMvcConfigurer {
         List<MediaType> fastMediaTypes =  new ArrayList<MediaType>();
         fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
         converter.setSupportedMediaTypes(fastMediaTypes);
+
+		FastJsonConfig fastJsonConfig = new FastJsonConfig();
+		fastJsonConfig.setSerializerFeatures(SerializerFeature.WriteMapNullValue, SerializerFeature.PrettyFormat, SerializerFeature.DisableCircularReferenceDetect);
+		converter.setFastJsonConfig(fastJsonConfig);
+
         return new HttpMessageConverters(converter);
     }
 

mec-web/src/main/java/com/ym/mec/web/config/WebMvcConfig.java

@@ -3,6 +3,8 @@ package com.ym.mec.web.config;
 import java.util.ArrayList;
 import java.util.List;
 
+import com.alibaba.fastjson.serializer.SerializerFeature;
+import com.alibaba.fastjson.support.config.FastJsonConfig;
 import com.ym.mec.web.interceptor.TenantInterceptor;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
@@ -45,6 +47,11 @@ public class WebMvcConfig implements WebMvcConfigurer {
 		List<MediaType> fastMediaTypes = new ArrayList<MediaType>();
 		fastMediaTypes.add(MediaType.APPLICATION_JSON_UTF8);
 		converter.setSupportedMediaTypes(fastMediaTypes);
+
+		FastJsonConfig fastJsonConfig = new FastJsonConfig();
+		fastJsonConfig.setSerializerFeatures(SerializerFeature.WriteMapNullValue, SerializerFeature.PrettyFormat, SerializerFeature.DisableCircularReferenceDetect);
+		converter.setFastJsonConfig(fastJsonConfig);
+
 		return new HttpMessageConverters(converter);
 	}
 }