Gson Converter Android

Introducing the Gson package//Gson parsing. Encapsulating server returns JSON resultsGson Gson =NewGson ();//1. Object Turn StringStudent stu =NewStudent (); Stu.setstudentid (333); Stu.setstudentname ("QQQ"); String Stustr=Gson.tojson (STU); System.out.println (STUSTR); //{"Studentname": "QQQ", "StudentID": 333}//String Goto ObjectStudent user2 = Gson.fromjson (Stustr, Student.class);           System.out.println (User2); String stutemp= "{\" studentname\ ": \" qqq2\ ", \" studentid\ ": 3335}"; Student User4= Gson.fromjson (Stutemp, Student.class);     System.out.println (USER4); //2. Object list Turn stringList<student> testbeanlist =NewArraylist<student>(); Student Testbean=NewStudent (); Testbean.setstudentid (555); Testbean.setstudentname ("552");           Testbeanlist.add (Testbean); //Gson gsonlist = new Gson (); Type type =NewTypetoken<list<student>> () {}.gettype ();//specifying Collection Object PropertiesString Beanlisttojson =Gson.tojson (testbeanlist, type); System.out.println (Beanlisttojson); //[{"Studentname": "552", "StudentID": 555}]//collection string to Object listList<student> Testbeanlistfromjson =Gson.fromjson (Beanlisttojson, type); System.out.println (Testbeanlistfromjson); //[555:552]//3, set if the type is not specified by default to stringList<string> testlist =NewArraylist<string>(); Testlist.add ("First"); Testlist.add ("Second"); String Listtojson=Gson.tojson (testlist); System.out.println (Listtojson); //["First", "second"]//The collection string goes back to the specified typeList<string> TestList2 = (list<string>) Gson.fromjson (Listtojson,NewTypetoken<list<string>>() {}.gettype ());     System.out.println (TESTLIST2); //4. Convert the HashMap string to JSONmap<string, string> TestMap =NewHashmap<string, string>(); Testmap.put ("id", "Id.first"); Testmap.put ("Name", "Name.second"); String Maptojson=Gson.tojson (TestMap); System.out.println (Maptojson); //{"id": "Id.first", "name": "Name.second"}//HashMap Turn Objectsmap<string, string> userMap2 = (map<string, string>) Gson.fromjson (Maptojson,NewTypetoken<map<string, string>>() {}.gettype ()); System.out.println (USERMAP2); //{id=id.first, name=name.second}//5. Objects containing common objects, sets, map conditionsStudent user1 =NewStudent (); User1.setstudentid (1001); User1.setstudentname ("Zhang San"); Student User3=NewStudent (); User3.setstudentid (1002); User3.setstudentname ("John Doe"); Map<string, student> UserMap =NewHashmap<string, student>(); Usermap.put ("User1", User1); Usermap.put ("User3", User3); List<Student> userlist =NewArraylist<student>();           Userlist.add (user1);                     Userlist.add (USER3); Teacher Groupbean=NewTeacher ();          Groupbean.setstudent (user1);          Groupbean.setstus (userlist);          Groupbean.setmap ((HASHMAP) usermap); //groupbean.setuserlist (userlist); Gson Gsongroup =NewGson (); String Sgroupbean= Gsongroup.tojson (Groupbean,NewTypetoken<teacher>() {}.gettype ());           System.out.println (Sgroupbean); /*{"Stus": [{"Studentname": "Zhang San", "StudentID": 1001},{"Studentname": "John Doe", "StudentID": 1002}], "student": {" Studentname ":" Zhang San "," StudentID ": 1001}," map ": {" User3 ": {" Studentname ":" John Doe "," StudentID ": 1002}," user1 ": {" Studentname ":" Zhang San "," StudentID ": 1001}," id ": 0," Age ": 0}*/      //Complex object string to objectTeacher groupBean2 =(Teacher) Gson.fromjson (Sgroupbean,NewTypetoken<teacher>() {}.gettype ());  System.out.println (GROUPBEAN2); 

Gson Converter Android