json字符串转换为JSONObject和JSONArray .

一.下载json 具体到http://www.json.org/上找java-json下载，并把其放到项目源代码中，这样就可以引用其类对象了

二.具体转化过程

//JSONObject

String jsonMessage = "{\"语文\":\"88\",\"数学\":\"78\",\"计算机\":\"99\"}";

String value1 = null;

try

{

//将字符串转换成jsonObject对象

JSONObject myJsonObject = new JSONObject(jsonMessage);

//获取对应的值

value1 = myJsonObject.getString("数学");

}

catch (JSONException e)

{

}

System.out.println("value1="+value1);

//JSONArray

jsonMessage = "[{'num':'成绩', '外语':88, '历史':65, '地理':99, 'object':{'aaa':'1111','bbb':'2222','cccc':'3333'}}," +

"{'num':'兴趣', '外语':28, '历史':45, '地理':19, 'object':{'aaa':'11a11','bbb':'2222','cccc':'3333'}}," +

"{'num':'爱好', '外语':48, '历史':62, '地理':39, 'object':{'aaa':'11c11','bbb':'2222','cccc':'3333'}}]";

JSONArray myJsonArray;

try

{

myJsonArray = new JSONArray(jsonMessage);

for(int i=0 ; i < myJsonArray.length() ;i++)

{

//获取每一个JsonObject对象

JSONObject myjObject = myJsonArray.getJSONObject(i);

//获取每一个对象中的值

String numString = myjObject.getString("num");

int englishScore = myjObject.getInt("外语");

int historyScore = myjObject.getInt("历史");

int geographyScore = myjObject.getInt("地理");

//获取数组中对象的对象

JSONObject myjObject2 = myjObject.getJSONObject("object");

String aaaString = myjObject2.getString("aaa");

System.out.println("aaaString="+aaaString);

System.out.println("numString="+numString);

System.out.println("englishScore="+englishScore);

System.out.println("historyScore="+historyScore);

System.out.println("geographyScore="+geographyScore);

}

}

catch (JSONException e)

{

}