Conversion between Java objects and JSON objects

Reference http://www.cnblogs.com/linjiqin/archive/2011/09/19/2181408.html
In the process of mobile Internet development, data service transmission is generally dominated by xml json. JSON is more convenient for object usage, so let's look at it.
Public class siminfo {private string IMEI; private string imsi; private string telephone; Public String getimei () {return IMEI;} public void setimei (string IMEI) {This. IMEI = IMEI;} Public String getimsi () {return imsi;} public void setimsi (string imsi) {This. imsi = imsi;} Public String gettelephone () {return telephone;} public void settelephone (string telephone) {This. telephone = telephone ;}}

The following JAR packages are required

1. convert a Java object to a JSON object and reverse parse and restore it

Siminfo = new siminfo ();
Siminfo. settelephone ("1111 ");
Siminfo. setimei ("2222 ");
Siminfo. setimsi ("3333 ");

String JSON = new jsonarray (). fromobject (siminfo). tostring ();
System. Out. println ("JSON:" + JSON );

JSON = JSON. substring (1, JSON. Length ()-1 );
Jsonobject OBJ = new jsonobject (). fromobject (JSON); // convert from a JSON object to a Java object
Siminfo siminfo_t = (siminfo) jsonobject. tobean (OBJ, siminfo. Class );
System. Out. println ("OBJ:" + siminfo_t );
System. Out. println (siminfo_t.getimei ());
System. Out. println (siminfo_t.getimsi ());
System. Out. println (siminfo_t.gettelephone ());

--------------- The execution result is as follows:

JSON: [{"IMEI": "2222", "imsi": "3333", "telephone": "1111"}]
OBJ: siminfo @ 1ac04e8
2222
3333
1111

2. convert a Java list object to a JSON object and reverse parse and restore it

Siminfo = new siminfo ();
Siminfo. settelephone ("1111 ");
Siminfo. setimei ("2222 ");
Siminfo. setimsi ("3333 ");
// Convert a Java object to a JSON object

Siminfo siminfo2 = new siminfo ();
Siminfo2.settelephone ("1111x ");
Siminfo2.setimei ("2222x ");
Siminfo2.setimsi ("3333x ");

List <siminfo> List = new arraylist <siminfo> ();
List. Add (siminfo );
List. Add (siminfo2 );

String JSON = new jsonarray (). fromobject (list). tostring ();
System. Out. println ("JSON:" + JSON );

List <siminfo> siminfos =Getjavacollection(New siminfo (), JSON );
System. Out. println (siminfos. Size ());
For (siminfo siminfo1: siminfos ){
System. Out. println ("IMEI:" + siminfo1.getimei ());
System. Out. println ("========= ");
}

Private Static <t> List <t>Getjavacollection(T clazz, string jsons ){
List <t> objs = NULL;
Jsonarray = (jsonarray) jsonserializer. tojson (jsons );
If (jsonarray! = NULL ){
Objs = new arraylist <t> ();
List list = (list) jsonserializer. tojava (jsonarray );
For (Object O: List ){
Jsonobject = jsonobject. fromobject (O );
T OBJ = (t) jsonobject. tobean (jsonobject, clazz. getclass ());
Objs. Add (OBJ );
}
}
Return objs;
}

--------------- The execution result is as follows:

JSON: [{"IMEI": "2222", "imsi": "3333", "telephone": "1111" },{ "IMEI": "2222x ", "imsi": "3333x", "telephone": "1111x"}]
2
IMEI: 2222.
==========
IMEI: 2222x
==========

3. supplement the instance. If the class object contains a list object, whether the conversion can be normal or not, the answer is yes. See the following example.

Public class siminfo {

Private string IMEI;
Private string imsi;
Private string telephone;
Private list <replay> re;
Public String getimei (){
Return IMEI;
}
Public void setimei (string IMEI ){
This. IMEI = IMEI;
}
Public String getimsi (){
Return imsi;
}
Public void setimsi (string imsi ){
This. imsi = imsi;
}
Public String gettelephone (){
Return telephone;
}
Public void settelephone (string telephone ){
This. Telephone = telephone;
}
Public list <replay> getre (){
Return re;
}
Public void setre (list <replay> re ){
This. Re = Re;
}

}

Siminfo = new siminfo ();
Siminfo. settelephone ("1111 ");
Siminfo. setimei ("2222 ");
Siminfo. setimsi ("3333 ");
List <replay> Re = new arraylist <replay> ();
Re. Add (New replay ("title1", "name1 "));
Re. Add (New replay ("title2", "name2 "));
Siminfo. setre (re );
// Convert a Java object to a JSON object

String JSON = new jsonarray (). fromobject (siminfo). tostring ();
System. Out. println ("JSON:" + JSON );

JSON = JSON. substring (1, JSON. Length ()-1 );
Jsonobject OBJ = new jsonobject (). fromobject (JSON );
Siminfo siminfo_t = (siminfo) jsonobject. tobean (OBJ, siminfo. Class );
System. Out. println ("OBJ:" + siminfo_t );
System. Out. println (siminfo_t.getimei ());
System. Out. println (siminfo_t.getimsi ());
System. Out. println (siminfo_t.gettelephone ());
System. Out. println (siminfo_t.getre (). Size ());

--------------- The execution result is as follows:

JSON: [{"IMEI": "2222", "imsi": "3333", "re": [{"name": "name1", "title ": "title1" },{ "name": "name2", "title": "title2"}], "telephone": "1111"}]
OBJ: siminfo @ df6ccd
2222
3333
1111
2