JSONObject和JSONArray中的key值转大写或小写的通用方法

一.有时需要json数据的key全部转成大写或者转成小写
二.直接上代码,一封装成一个工具类了,直接传入JSONObject或JSONArray对象,调用数组或对象的方法就能实现.
package cn.wisesign.commonutil.jsonpath;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.InputStreamReader;
import java.io.Reader;
import java.util.Iterator;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

/**

• 修改JSON的key为小写或者大写
  */
  @SuppressWarnings(“rawtypes”)
  public class JSONKeyTransfer {

  public static final String JSONOBJECT_KEY = “JSONObject”;

  public static final String JSONARRAY_KEY = “JSONArray”;

  /**

  • 修改json的key为大写或者小写
  • @throws
    */
    public static JSONObject transferJsonKey(JSONObject json) {
    JSONObject object = new JSONObject();
    if (json.getClass().toGenericString().endsWith(JSONOBJECT_KEY)) {
    JSONObject jsonObject = (JSONObject)json;
    Iterator iterator = jsonObject.keys();
    while (iterator.hasNext()) {
    String jsonKey = (String) iterator.next();
    Object valueObject = jsonObject.get(jsonKey);
    if (valueObject.getClass().toString().endsWith(JSONOBJECT_KEY)) {
    JSONObject checkObject = JSONObject.fromObject(valueObject);
    // 当值为null时，valueObject还是JSONObject对象，判空是不成立的，要判断是否是nullObject
    if (!checkObject.isNullObject()) {
    object.accumulate(jsonKey.toUpperCase(), transferJsonKey((JSONObject) valueObject));
    } else {
    object.accumulate(jsonKey, null);
    }
    } else if (valueObject.getClass().toString().endsWith(JSONARRAY_KEY)) {
    object.accumulate(jsonKey.toUpperCase(), transferJsonArray(jsonObject.getJSONArray(jsonKey)));
    }else{
    object.accumulate(jsonKey.toUpperCase(), valueObject);
    }
    }
    }
    return object;
    }

  /**

  • JSONArray key大小写转换
  • @throws
    */
    public static JSONArray transferJsonArray(JSONArray jsonArray) {
    JSONArray array = new JSONArray();
    if (null != jsonArray && jsonArray.size() > 0) {
    for (Object object : jsonArray) {
    if (object.getClass().toString().endsWith(JSONOBJECT_KEY)) {
    array.add(transferJsonKey((JSONObject) object));
    } else if (object.getClass().toString().endsWith(JSONARRAY_KEY)) {
    array.add(transferJsonArray((JSONArray) object));
    }
    }
    }
    return array;
    }

  public static void main(String[] args) {
  String jsonStr = “”;
  try {
  File jsonFile = new File(“d:\test.json”);
  FileReader fileReader = new FileReader(jsonFile);

       Reader reader = new InputStreamReader(new FileInputStream(jsonFile),"utf-8");
       int ch = 0;
       StringBuffer sb = new StringBuffer();
       while ((ch = reader.read()) != -1) {
           sb.append((char) ch);
       }
       fileReader.close();
       reader.close();
       jsonStr = sb.toString();
  

// jsonStr = jsonStr.toUpperCase();
}catch(Exception e){

    }
	//String str = "{\"contextDTO\":{\"appPackAccToken\":null,\"cAllChainId\":\"\",\"callCount\":0,\"currentCallId\":\"0\",\"employeeId\":\"00000000-0000-0000-0000-000000000000\",\"id\":null,\"latitude\":null,\"loginCurrentCulture\":0,\"loginDepartment\":\"00000000-0000-0000-0000-000000000000\",\"loginDepartmentName\":null,\"loginIP\":null,\"loginOrg\":\"00000000-0000-0000-0000-000000000000\",\"loginTenantId\":\"00000000-0000-0000-0000-000000000000\",\"loginTenantName\":null,\",\"loginUserCode\":\"dddddd\",\"loginUserID\":\"79694a50-ea5f-4d66-99ef-bc7661cc2477\",\"loginUserName\":\"测试\",\"longitude\":null,\"sessionID\":\"97571283-6eed-4fd5-9d7c-6c60dbd362c9\"},\"statusCode\":null}";
	JSONObject object = JSONObject.fromObject(jsonStr);
    //JSONArray object = JSONArray.fromObject(jsonStr);
	object = transferJsonKey(object);
	//object = transferJsonArray(object);
	System.out.println(object.toString());
}

}