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,...
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...
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...
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....
(ThreadPoolExecutor.java:624)atjava.lang.Thread.run(Thread.java:748)Causedby:com.sun.jersey.api.client.ClientHandlerException:com.fasterxml.jackson.databind.JsonMappingException:Cannotdeserializeinstanceofjava.util.ArrayListoutofSTART_OBJECTtokenat[Source:sun.net.www.protocol.http.HttpURLConnection$HttpInput...
nested exception is org.codehaus.jackson.map.JsonMappingException: Can not deserialize instance of java.lang.String out of START_OBJECT token at [Source: org.apache.http.conn.EofSensorInputStream@42b0f150; line:1, column: 112] (through reference chain: com.webservice.net.model.GetAffairNewsList...