对jsonArray数组存储的对象做自定义按多个值排序

public void batchRepayment() throws IOException{

String jsonString = "[{ \"orderId\": \"431\", \"installment\": \"9\" }, { \"orderId\": \"135\", \"installment\": \"9\" },{ \"orderId\": \"432\", \"installment\": \"9\" },{ \"orderId\": \"135\", \"installment\": \"8\" },{ \"orderId\": \"135\", \"installment\":
\"2\" },{ \"orderId\": \"432\", \"installment\": \"5\" },{ \"orderId\": \"431\", \"installment\": \"3\" }]";

JSONArray jsonArray = JSONArray.fromObject(jsonString);

if(jsonArray != null){

List<JSONObject> jsonList = new ArrayList<JSONObject>();

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

jsonList.add(jsonArray.getJSONObject(i));

}

//重写排序方法，按照order by orderId,installment方式排序，确保同个订单orderId优先还期数installment靠前的

Collections.sort( jsonList, new Comparator<JSONObject>() {

private static final String KEY_NAME = "orderId";

private static final String KEY_NAME2 = "installment";

@Override

public int compare(JSONObject a, JSONObject b) {

String valA_1 = new String();

String valB_1 = new String();

String valA_2 = new String();

String valB_2 = new String();

try {

valA_1 = a.getString(KEY_NAME);

valB_1 = b.getString(KEY_NAME);

valA_2 = a.getString(KEY_NAME2);

valB_2 = b.getString(KEY_NAME2);

}catch (JSONException e) {

//do something

}

int flag = valA_1.compareTo(valB_1);

if(flag == 0){

return valA_2.compareTo(valB_2);

}else{

return flag;

}

}

});

}