fastjson.JSONException: default constructor not found异常时,通常是因为目标类缺少无参构造方法。在Java中,使用fastjson库解析JSON对象时,fastjson会通过反射机制来创建对象实例,并设置对象的属性。为了成功创建对象,目标类必须提供一个无参构造方法(即默认构造方法)。如果目标类没有无参构造方法,fastjson就会抛出default ...
defaultconstructornotfoundfortype剥离 这个错误信息“defaultconstructornotfoundfortype”通常意味着你正在尝试创建一个该类型的对象,但没有为其找到默认构造函数。默认构造函数是一个不接受任何参数的构造函数。解决这个问题的方法通常取决于具体的情况和代码结构。下面是一些建议:1.确保有一个无参数的构造函数:如果你...
简介:default constructor not found 异常解决方法 Exception in thread "Thread-13" com.alibaba.fastjson.JSONException: default constructor not found. class com.nowcoder.async.EventModelat com.alibaba.fastjson.util.JavaBeanInfo.build(JavaBeanInfo.java:212)at com.alibaba.fastjson.parser.ParserConfig.createJava...
Exceptioninthread"Thread-13"com.alibaba.fastjson.JSONException:defaultconstructor not found.classcom.nowcoder.async.EventModelat com.alibaba.fastjson.util.JavaBeanInfo.build(JavaBeanInfo.java:212)at com.alibaba.fastjson.parsercreateJavaBeanDeserializerParserConfigjava:504)at com.alibaba.fastjson.parser.ParserConf...
default constructor not found 异常解决方法 Exception in thread "Thread-13" com.alibaba.fastjson.JSONException: default constructor not found. class com.nowcoder.async.EventModel at com.alibaba.fastjson.util.JavaBeanInfo.build(JavaBeanInfo.java:212) at com.alibaba.fastjson.parser.ParserConfig.create...
com.alibaba.fastjson.JSONException: default constructor not found. 在bean类中添加一个无参构造方法即可
com.alibaba.fastjson.JSONException: default constructor not found,com.alibaba.fastjson.JSONException:defaultconstructornotfound记得添加构造函数
.w.s.m.s.DefaultHandlerExceptionResolver : Failed to read HTTP message: org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: default constructor not found. class java.time.YearMonth; nested exception is com.alibaba.fastjson.JSONException: default constructor not found....
Describe the bug when i update version from 1.16.22 to 1.18.22 default constructor not found To Reproduce @Data @Builder public class User { private String name; private int age; } <dependency> <groupId>org.projectlombok</groupId> <artif...
default constructor not found 异常解决方法,Exceptioninthread"Thread-13"com.alibaba.fastjson.JSONException:defaultconstructornotfound.classcom.nowcoder.async.EventModelatcom.alibaba.fastjson.util.JavaBeanInfo.build(JavaBeanInfo.j