JsonMappingException: Can not deserialize instance of java.lang.String 错误通常发生在尝试将JSON数据反序列化为Java对象时,JSON数据的结构与Java对象的期望结构不匹配。以下是对此错误的详细分析、常见原因、解决方案以及代码示例: 1. 常见原因分析 字段类型不匹配:Java类中的字段类型与JSON中的数据类型不一致。例如,...
//testAtoB() 发生:Can not deserialize instance of com.test.JSONTest$Hobby out of START_ARRAY token testBtoA(); //testBtoA() 发生:Can not deserialize instance of java.util.ArrayList out of START_OBJECT token } public static void testAtoB(){ List<Hobby> hobbies = new ArrayList<>(); Ran...
//testAtoB() 发生:Can not deserialize instance of com.test.JSONTest$Hobby out of START_ARRAY token testBtoA(); //testBtoA() 发生:Can not deserialize instance of java.util.ArrayList out of START_OBJECT token } public static void testAtoB(){ List<Hobby> hobbies = new ArrayList<>(); Ran...
public ResponseResultscanPlateNumber(@RequestBody Integer plateId) { VehicleEntity vehicleEntity; try{ logger.info("批次发货--添加车牌id:"+plateId); 因为@RequestBody是将post请求中content值转为一个整体对象。@RequestBody的解析有两个条件: 1.POST请求中content的值必须为json格式(存储形式可以是字符串,...
报错信息为: JSON parse error: Can not deserialize instance of java.util.ArrayList out of START_OBJECT token; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.util.ArrayList out of START_OBJECT token ...
In this short tutorial, we’ll shed light on how to fix the exceptionJsonMappingException: Can not deserialize instance of java.util.ArrayList from Object value (token `JsonToken.START_OBJECT`). First, we’ll highlight the main cause of the exception. Then we...
exist): cannot deserialize from Object value (no delegate- or property-based Creator • JSON parse error: Can not construct instance of java.time.LocalDate: no String-argument constructor/factory method to deserialize from String value • How to convert JSON string into List of Java...
instanceArrayListofdeserializenotRecently, when writing a three-party service interface with the company framework , report errors Can not deserialize instance of java.util.ArrayList out of VALUE_TRUE token The service interface is defined as follows :@Path("healthMonitorService") @Consumes(MediaType....
无法反序列化 11:30:14,382 ERROR AbstractController:201 - Could not read JSON: Can not deserialize instance of java.lang.String out of START_OBJECT token at [Source: org.apache.catalina.connector.CoyoteInputStream@1d843f1; line: 1, column: 61] (through reference chain: cn.ql.module.project...
今天在测试时Spring出现Can not deserialize instance of java.lang.Integer out of START_ARRAY token的错误 主要的问题原因是类型不匹配。 你需要检查前端上传的类型和后台定义的类型是否相同。 比如我的后台需要接受的是Integer类型,但是在前端却传的是String类型,因此报错。