json构造和解析

创建json:

//construct json and output it

public String jsonTest() throws JSONException{

JSONObject json=new JSONObject();

JSONArray jsonMembers = new JSONArray();

JSONObject member1 = new JSONObject();

member1.put("loginname", "zhangfan");

member1.put("password", "userpass");

member1.put("email","[email protected]");

member1.put("sign_date", "2007-06-12");

jsonMembers.put(member1);

JSONObject member2 = new JSONObject();

member2.put("loginname", "zf");

member2.put("password", "userpass");

member2.put("email","[email protected]");

member2.put("sign_date", "2008-07-16");

jsonMembers.put(member2);

json.put("users", jsonMembers);

return json.toString();

}

解析json:

//construct json from String and resolve it.

public String jsonTest2() throws JSONException{

String jsonString="{\"users\":[{\"loginname\":\"zhangfan\",\"password\":\"userpass\",\"email\":\"[email protected]\"},{\"loginname\":\"zf\",\"password\":\"userpass\",\"email\":\"[email protected]\"}]}";

JSONObject json= new JSONObject(jsonString);

JSONArray jsonArray=json.getJSONArray("users");

String loginNames="loginname list:";

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

JSONObject user=(JSONObject) jsonArray.get(i);

String userName=(String) user.get("loginname");

if(i==jsonArray.length()-1){

loginNames+=userName;

}else{

loginNames+=userName+",";

}

}

return loginNames;

}