【util】深度合并（深度拷贝）两个JSON对象

有个功能深度合并两个JSON对象，需要两个json进行深度合并处理，即合并具有相同名称的字段的内容（就像在 Windows 中复制文件夹时一样）。

import org.json.JSONException;
import org.json.JSONObject;

public class JsonUtils {
	
	public static JSONObject deepMerge(JSONObject source, JSONObject target) throws JSONException {
		for (String key : JSONObject.getNames(source)) {
			Object value = source.get(key);
			if (!target.has(key)) {
				// new value for "key":
				target.put(key, value);
			} else {
				// existing value for "key" - recursively deep merge:
				if (value instanceof JSONObject) {
					JSONObject valueJson = (JSONObject) value;
					deepMerge(valueJson, target.getJSONObject(key));
				} else {
					target.put(key, value);
				}
			}
		}
		return target;
	}

	
	public static void main(String[] args) throws JSONException {
		JSONObject a = new JSONObject("{offer: {issue1: value1}, accept: true}");
		JSONObject b = new JSONObject("{offer: {issue2: value2}, reject: false}");
		System.out.println(a + " + " + b + " = " + JsonUtils.deepMerge(a, b));
// prints:
// {"accept":true,"offer":{"issue1":"value1"}} + {"reject":false,"offer":{"issue2":"value2"}} = {"reject":false,"accept":true,"offer":{"issue1":"value1","issue2":"value2"}}
	}

}

深度合并两个JSON对象