through reference chain: propertymanagement.entity.R[“list“]

chain: propertymanagement.entity.R[“list“]"/>

through reference chain: propertymanagement.entity.R[“list“]

一、问题描述

Resolved [org.springframework.http.converter.HttpMessageConversionException: Type definition error: [simple type, class org.apache.ibatis.executor.loader.javassist.JavassistProxyFactory$EnhancedResultObjectProxyImpl]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class org.apache.ibatis.executor.loader.javassist.JavassistProxyFactory$EnhancedResultObjectProxyImpl and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: com.example.propertymanagement.entity.R["list"]->java.util.ArrayList[0]->com.example.propertymanagement.entity.Payment_$$_jvstd3b_0["handler"])]

大意是，`com.example.propertymanagement.entity.R["list"]`要转换成Json，转换失败。

问题代码段：

    /*** 获取用户需缴费单列表* @return*/@RequestMapping("/myList")public R myList(@RequestBody Integer id){List<Payment> list = paymentService.getByUserId(id);System.out.println(list);Map<String,Object> map = new HashMap<>();map.put("list",list);return R.ok(map);}

二、解决方法

既然帮转json转不了，那就自己转json。

    /*** 获取用户需缴费单列表* @return*/@RequestMapping("/myList")public R myList(@RequestBody Integer id){List<Payment> list = paymentService.getByUserId(id);Object json = JSON.toJSON(list);    //自己将数据转为jsonMap<String,Object> map = new HashMap<>();map.put("list",json);return R.ok(map);}