循环引用导致fastjson序列化与反序列化StackOverflowError
所属分类 java
浏览量 3385
fastjson版本 1.2.55
class Data1{
public String name = "data1";
public Data2 data;
}
class Data2{
public String name = "data2";
public Data1 data;
}
循环依赖
不加 SerializerFeature.DisableCircularReferenceDetect
序列化可以成功,但是结果会带上 $ref
{"data":{"data":{"$ref":".."},"name":"data2"},"name":"data1"}
反序列化时 java.lang.StackOverflowError
加上 SerializerFeature.DisableCircularReferenceDetect
序列化时就 StackOverflowError
具体测试代码
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
public class FastJsonStackOverflowTest {
public static void main(final String[] args) {
Data1 data1 = new Data1();
Data2 data2 = new Data2();
data1.data = data2;
data2.data = data1;
String str = JSON.toJSONString(data1);
System.out.println(str);
// java.lang.StackOverflowError
try{
Data1 tmp = JSON.parseObject(str,Data1.class);
System.out.println(tmp);
}catch(Throwable e){
System.out.println("JSON.parseObject error,"+e);
}
str = JSON.toJSONString(data1,true);
System.out.println(str);
//
str = null;
try{
str = JSON.toJSONString(data1, SerializerFeature.DisableCircularReferenceDetect);
}catch(Throwable e){
// java.lang.StackOverflowError
System.out.println(e);
}
System.out.println(str);
str = JSON.toJSONString(data1, SerializerFeature.DisableCircularReferenceDetect);
}
private static class Data1{
public String name = "data1";
public Data2 data;
@Override
public String toString(){
return "name="+name+",data="+data;
}
}
private static class Data2{
public String name = "data2";
public Data1 data;
@Override
public String toString(){
return "name="+name+",data="+data;
}
}
}
运行结果
{"data":{"data":{"$ref":".."},"name":"data2"},"name":"data1"}
JSON.parseObject error,java.lang.StackOverflowError
{
"data":{
"data":{"$ref":".."},
"name":"data2"
},
"name":"data1"
}
java.lang.StackOverflowError
null
Exception in thread "main" java.lang.StackOverflowError
at com.alibaba.fastjson.serializer.JavaBeanSerializer.writeReference(JavaBeanSerializer.java:548)
at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:185)
at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:160)
at com.alibaba.fastjson.serializer.FieldSerializer.writeValue(FieldSerializer.java:324)
at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:454)
at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:160)
at com.alibaba.fastjson.serializer.FieldSerializer.writeValue(FieldSerializer.java:324)
at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:454)
at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:160)
at com.alibaba.fastjson.serializer.FieldSerializer.writeValue(FieldSerializer.java:324)
at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:454)
at com.alibaba.fastjson.serializer.JavaBeanSerializer.write(JavaBeanSerializer.java:160)
at com.alibaba.fastjson.serializer.FieldSerializer.writeValue(FieldSerializer.java:324)
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