[BUG] 无法反序列化Class<?>对象

[Watson-Bao]

问题描述

反序列化Class<?>对象时报错
Exception in thread "main" com.alibaba.fastjson2.JSONException: not support autoType :
at com.alibaba.fastjson2.reader.ObjectReaderImplClass.readObject(ObjectReaderImplClass.java:30)
at com.alibaba.fastjson2.JSON.parseObject(JSON.java:159)

环境信息

请填写以下信息：

• OS信息： Win10 21H2
• JDK信息： Openjdk 1.8
• 版本信息：Fastjson2 2.0.3

重现步骤

HelloObject helloObject = new HelloObject();
Class<?> clazz= helloObject.getClass();
String s = JSON.toJSONString(clazz);
System.out.println(s);
Class<?> parse = JSON.parseObject(s, Class.class);
System.out.println(parse);

[wenshao]

2.x中，为更安全，缺省不支持，你可以通过JSONReader.Feature.SupportClassForName打开

Class<?> parse = JSON.parseObject(s, Class.class, JSONReader.Feature.SupportClassForName);

[Watson-Bao]

对于带Class数组字段的对象还是无法正确反序列化
Exception in thread "main" java.lang.SecurityException: Cannot make a java.lang.Class constructor accessible at java.lang.reflect.AccessibleObject.setAccessible0(AccessibleObject.java:140) at java.lang.reflect.AccessibleObject.setAccessible(AccessibleObject.java:129) at com.alibaba.fastjson2.reader.ObjectReaderCreator.createObjectReader(ObjectReaderCreator.java:612) at com.alibaba.fastjson2.reader.ObjectReaderCreatorASM.createObjectReader(ObjectReaderCreatorASM.java:313) at com.alibaba.fastjson2.reader.ObjectReaderProvider.getObjectReader(ObjectReaderProvider.java:704) at com.alibaba.fastjson2.JSONReader$Context.getObjectReader(JSONReader.java:2231) at com.alibaba.fastjson2.reader.ObjectReaderBaseModule$GenericArrayImpl.readObject(ObjectReaderBaseModule.java:2388) at com.alibaba.fastjson2.reader.FieldReaderObjectMethod.readFieldValue(FieldReaderObjectMethod.java:90) at com.alibaba.fastjson2.reader.ObjectReader1.readObject(ObjectReader1.java:241) at com.alibaba.fastjson2.JSON.parseObject(JSON.java:350)
测试样例

Class<?>[] arrays= new Class[] { String.class, HelloObject.class, String.class};
Wrapper wrapper=new Wrapper();
wrapper.setParameterTypes(arrays);
String s = JSON.toJSONString(wrapper);
System.out.println(s);
Wrapper parse = JSON.parseObject(s, Wrapper.class, JSONReader.Feature.SupportClassForName);
System.out.println(parse);

[wenshao]

https://oss.sonatype.org/content/repositories/snapshots/com/alibaba/fastjson2/fastjson2/2.0.6-SNAPSHOT/

2.0.6-SNAPSHOT已修复你的问题，可以先验证下，2.0.6版本预计在6月5日前会发布

[Watson-Bao]

测试完没问题了

[wenshao]

https://github.com/alibaba/fastjson2/releases/tag/2.0.6
问题已经修复，请用新版本