Json:there is a cycle in the hierarchy!

When using Jsonobject.fromobject, the "there is a cycle in the hierarchy" exception appears.

It means that there is a cycle of death, that is, the model has a cyclic inclusion relationship;

Workaround:

Use Setcycledetectionstrategy to prevent self-contained

Code:

New== json.tostring ();

Dependent Packages:

Import Net.sf.json.JSONArray; Import Net.sf.json.JSONObject; Import Net.sf.json.JsonConfig; import net.sf.json.util.CycleDetectionStrategy;

Full Real column

/*** Here to test if it contains self-contained time need Cycledetectionstrategy*/      Public Static voidTestcycleobject () {Cycleobject object=NewCycleobject (); Object.setmemberid ("Yajuntest"); Object.setsex ("Male"); Jsonconfig Jsonconfig=NewJsonconfig ();           Jsonconfig.setcycledetectionstrategy (cycledetectionstrategy.lenient); Jsonobject JSON=Jsonobject.fromobject (object, jsonconfig);     SYSTEM.OUT.PRINTLN (JSON); }        Public Static voidMain (string[] args) {jsontest.testcycleobject (); }  

where Cycleobject.java

 Public class cycleobject {        private  String      MemberID;       Private String      sex;       Private  This ;   // getters && Setters  

Json:there is a cycle in the hierarchy!