JSON various conversions Summary

Convert between jsonobject,jsonarray,map,string
http://blog.csdn.net/superit401/article/details/51727739

1.String Turn Jsonobject

String jsonmessage = "{" Language ":" 88 "," Math ":" 78 "," Computer ":" 99 "}";

Jsonobject Myjson = Jsonobject.fromobject (jsonmessage);

2.String Turn Jsonarray

String jsonmessage = "[{' num ': ' Score ', ' foreign language ': 88, ' history ': 65, ' geography ': ' A ', ' object ': ' AAA ': ' 1111 ', ' BBB ': ' 2222 ', ' cccc ': ' 3333 '}}," +
"{' num ': ' Interest ', ' foreign language ': 28, ' history ': 45, ' geography ': +, ' object ': {' aaa ': ' 11a11 ', ' BBB ': ' 2222 ', ' cccc ': ' 3333 '}}," +
"{' num ': ' Hobby ', ' foreign language ': 48, ' History ': 62, ' geography ': ' The '": ' ' aaa ': ' 11c11 ', ' BBB ': ' 2222 ', ' cccc ': ' 3333 '}}] ";
Jsonarray Myjsonarray = Jsonarray.fromobject (jsonmessage);
System.out.println (Myjsonarray);

3.String Turn Map

(1)

String jsonmessage = "{" Language ":" 88 "," Math ":" 78 "," Computer ":" 99 "}";

Jsonobject Myjson = Jsonobject.fromobject (jsonmessage);

Map m = Myjson;

(2) (need to introduce Jackjson core, DataBind, annotations three jar packages)

String json = "{" "PayPal Key2": "PayPal value2", "PayPal Key1": "PayPal value1", "PayPal Key3": "PayPalvalue3"} ";

Objectmapper mapper = new Objectmapper ();
Map

(3) (string in special format)

String A = "{se=2016, Format=xml, at=en co=3}";

A = a.substring (1, A.length ()-1);
Map DocType = new HashMap ();
Java.util.StringTokenizer items;
for (StringTokenizer Entrys = new StringTokenizer (A, ","); Entrys.hasmoretokens ();
Doctype.put (Items.nexttoken (), Items.hasmoretokens ()? ((Object) (Items.nexttoken ())): null) {
Items = new StringTokenizer (Entrys.nexttoken (), "=");
}

4.JSONObject, Jsonarray,map turn string

Jsonobject--string:

System.out.println (myjsonobject);//can directly output the contents of Jsonobject

Myjsonobject.tostring ();

Jsonarray--string:

System.out.println (Myjsonarray);//can directly output the contents of Myjsonarray

Myjsonarray.tostring ();

Map--string:

SYSTEM.OUT.PRINTLN (map);//can directly output the contents of the map

Map.tostring ();

5.JSONObject Turn Jsonarray

6.JSONObject Turn Map

Jsonobject Myjson = Jsonobject.fromobject (jsonstring);

Map m = Myjson;

7.JSONArray Turn Jsonobject

for (int i=0; i < myjsonarray.length (); i++)
{
Get each of the Jsonobject objects
Jsonobject Myjobject = Myjsonarray.getjsonobject (i);

}

8.JSONArray Turn Map

9.Map Turn Jsonobject

Jsonobject JSON = jsonobject.fromobject (map);

10.Map Turn Jsonarray

Jsonarray.fromobject (map);

11.List Turn Jsonarray
Jsonarray jsonArray2 = jsonarray.fromobject (list);

12.JSONArray Goto List

List

13.String Turn Array

String string = "A,b,c";
String [] stringarr= string.split (","); Note that separators are needed to translate the drops ...
If it is a string like "abc", it is directly
String string = "abc";
char [] Stringarr = String.tochararray (); Note The return value is a char array
If you want to return a byte array, use the GetBytes method directly OK ~ ~
String string = "abc";
byte [] Stringarr = String.getbytes ();

Array to String

Char[] Data={a,b,c};
String S=new string (data);

JSON various conversions Summary