1. Json含有數組時，先把String類型的json串轉換的Json對象，通過getJSONArray(key)方法獲取其Array部分，然後通過下標和key獲取相應子數組裏具體的字段值：
String test_arrary = "{\"address\": [{\"addressLine1\": \"Noida\",\"addressLine2\": \"UP\"}],\"firstName\": \"Achyut\",\"lastName\": \"khanna\"}";
public static String getJsonArray(String reqJson) {
JSONObject json = null;
String address2 = null;
try {
json = new JSONObject(reqJson);
JSONArray jsonarr= json.getJSONArray("address");
String address1 = jsonarr.getJSONObject(0).getString("addressLine1");
address2 = jsonarr.getJSONObject(0).getString("addressLine2");
System.out.println("address1==" + address1);
System.out.println("address2==" + address2);
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
return address2;
}
2. 獲取嵌套Json值，即先獲取嵌套的內層data爲json對象，然後轉換爲string，然後可以通過getString(key)方式獲取data裏面的各個字段值：
String test_json = "{\"comm\":{\"comm\":null,\"data\":null,\"unitcode\":\"100001\",\"trxcode\":\"60301\",\"orderno\":\"201803050000023\",\"sendtime\":\"20180307 11:16:18\",\"sendserno\":\"20180307000000000001\",\"channel\":\"pc\",\"sendcode\":\"yxcd\",\"signcode\":\"\"},\"data\":{\"orderno\":\"201803050000023\",\"urgentflag\":null,\"loanamt\":null,\"servamt\":null,\"allamt\":\"50000.00\",\"chnsname\":\"張立男\",\"buybackreason\":null,\"filetrans\":\"0\",\"filename\":null,\"filepasswd\":null,\"filesize\":null}}";
public static String queryData(String reqJson, String data) {
String str = null;
if (null != data && !data.equals("")) {
try {
str = new JSONObject(reqJson).getJSONObject(data).toString();
} catch (JSONException e) {
e.printStackTrace();
LogUtil.info(e.getMessage());
}
} else str = "Json報文data部分爲空！";
System.out.println("data ==="+str);
return str;
}
