我有JSONObject数据，里面有多个对象。 我想要做的是，将json变为简单的层次结构。
JSON数据
{
"Response": {
"type": "string",
"content": "0000"
},
"Data": {
"item": [
{
"firstname": {
"type": "string",
"content": "Bryan"
},
"lastname": {
"type": "string",
"content": "Adams"
},
"kids": {
"item": [
{
"name": {
"type": "string",
"content": "Tommy"
},
"age": {
"type": "string",
"content": "9"
}
},
{
"name": {
"type": "string",
"content": "Jane"
},
"age": {
"type": "string",
"content": "4"
}
}
]
}
},
{
"firstname": {
"type": "string",
"content": "Joey"
},
"lastname": {
"type": "string",
"content": "Cena"
},
"kids": {
"item": [
{
"name": {
"type": "string",
"content": "Maria"
},
"age": {
"type": "string",
"content": "7"
}
},
{
"name": {
"type": "string",
"content": "Dany"
},
"age": {
"type": "string",
"content": "3"
}
}
]
}
}
]
}
}
我的代码
package junk;
import java.util.Iterator;
import org.json.JSONException;
import org.json.JSONObject;
/**
*
* @author Agung
*/
class Foo {
private static JSONObject objResponse = new JSONObject();
public static void main(String args[]) throws JSONException {
JSONObject jsonObj = new JSONObject("{\"Response\":{\"type\":\"string\",\"content\":\"0000\"},\"Data\":{\"item\":[{\"firstname\":{\"type\":\"string\",\"content\":\"Bryan\"},\"lastname\":{\"type\":\"string\",\"content\":\"Adams\"},\"kids\":{\"item\":[{\"name\":{\"type\":\"string\",\"content\":\"Tommy\"},\"age\":{\"type\":\"string\",\"content\":\"9\"}},{\"name\":{\"type\":\"string\",\"content\":\"Jane\"},\"age\":{\"type\":\"string\",\"content\":\"4\"}}]}},{\"firstname\":{\"type\":\"string\",\"content\":\"Joey\"},\"lastname\":{\"type\":\"string\",\"content\":\"Cena\"},\"kids\":{\"item\":[{\"name\":{\"type\":\"string\",\"content\":\"Maria\"},\"age\":{\"type\":\"string\",\"content\":\"7\"}},{\"name\":{\"type\":\"string\",\"content\":\"Dany\"},\"age\":{\"type\":\"string\",\"content\":\"3\"}}]}}]}}");
Foo.getResponseContent(jsonObj);
System.out.println(objResponse);
}
private static void getResponseContent(JSONObject jsonObj) throws JSONException {
Iterator<?> keys = jsonObj.keys();
while (keys.hasNext()) {
String key = (String) keys.next();
if (jsonObj.get(key) instanceof JSONObject) {
JSONObject object = jsonObj.getJSONObject(key);
if (object.has("content")) {
String content = (String) object.get("content");
objResponse.put(key, content);
} else {
// if we get here, so the element have multiple node
objResponse.put(key, object);
getResponseContent(object);
}
}
}
}
}
使用我的代码，我得到了这个结果：
{
"Response": "0000",
"Data": {
"item": [
{
"firstname": {
"type": "string",
"content": "Bryan"
},
"lastname": {
"type": "string",
"content": "Adams"
},
"kids": {
"item": [
{
"name": {
"type": "string",
"content": "Tommy"
},
"age": {
"type": "int",
"content": "9"
}
},
{
"name": {
"type": "string",
"content": "Jane"
},
"age": {
"type": "int",
"content": "4"
}
}
]
}
},
{
"firstname": {
"type": "string",
"content": "Joey"
},
"lastname": {
"type": "string",
"content": "Cena"
},
"kids": {
"item": [
{
"name": {
"type": "string",
"content": "Maria"
},
"age": {
"type": "int",
"content": "7"
}
},
{
"name": {
"type": "string",
"content": "Dany"
},
"age": {
"type": "int",
"content": "3"
}
}
]
}
}
]
}
}
仅适用于没有多个元素的字段。 但我想要的结果是：
{
"Response": "0000",
"Data": {
"item": [
{
"firstname": "Bryan",
"lastname": "Adams",
"kids": {
"item": [
{
"name": "Tommy",
"age": 9
},
{
"name": "Jane",
"age": 4
}
]
}
},
{
"firstname": "Joey",
"lastname": "Cena",
"kids": {
"item": [
{
"name": "Maria",
"age": 7
},
{
"name": "Dany",
"age": 3
}
]
}
}
]
}
}
我不知道如何从数据字段中删除对象。
答案 0 :(得分：0)
这是一个以你想要的格式创建输出的程序：像你一样，我使用过递归，我做的改变是：
以下是代码：
package test;
import java.util.Iterator;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
public class TestMain {
public static void main(String args[]) throws Exception {
JSONObject objResponse = new JSONObject();
JSONObject jsonObj = new JSONObject(
"{\"Response\":{\"type\":\"string\",\"content\":\"0000\"},\"Data\":{\"item\":[{\"firstname\":{\"type\":\"string\",\"content\":\"Bryan\"},\"lastname\":{\"type\":\"string\",\"content\":\"Adams\"},\"kids\":{\"item\":[{\"name\":{\"type\":\"string\",\"content\":\"Tommy\"},\"age\":{\"type\":\"string\",\"content\":\"9\"}},{\"name\":{\"type\":\"string\",\"content\":\"Jane\"},\"age\":{\"type\":\"string\",\"content\":\"4\"}}]}},{\"firstname\":{\"type\":\"string\",\"content\":\"Joey\"},\"lastname\":{\"type\":\"string\",\"content\":\"Cena\"},\"kids\":{\"item\":[{\"name\":{\"type\":\"string\",\"content\":\"Maria\"},\"age\":{\"type\":\"string\",\"content\":\"7\"}},{\"name\":{\"type\":\"string\",\"content\":\"Dany\"},\"age\":{\"type\":\"string\",\"content\":\"3\"}}]}}]}}");
getResponseContent(jsonObj, objResponse);
System.out.println(objResponse.toString(2));
}
private static void getResponseContent(JSONObject jsonObj, JSONObject objResponse) throws JSONException {
Iterator<?> keys = jsonObj.keys();
while (keys.hasNext()) {
String key = (String) keys.next();
JSONObject child = jsonObj.optJSONObject(key);
if (child != null) {
if (child.has("content")) {
objResponse.put(key, child.get("content"));
} else {
JSONObject responseChild = new JSONObject();
objResponse.put(key, responseChild);
getResponseContent(child, responseChild);
}
} else {
JSONArray children = jsonObj.optJSONArray(key);
if (children != null) {
JSONArray responseChildren = new JSONArray();
objResponse.put(key, responseChildren);
for (int i = 0; i < children.length(); i++) {
child = children.getJSONObject(i);
JSONObject responseChild = new JSONObject();
responseChildren.put(responseChild);
getResponseContent(child, responseChild);
}
}
}
}
}
}
这是它的输出：
{
"Response": "0000",
"Data": {"item": [
{
"firstname": "Bryan",
"lastname": "Adams",
"kids": {"item": [
{
"name": "Tommy",
"age": "9"
},
{
"name": "Jane",
"age": "4"
}
]}
},
{
"firstname": "Joey",
"lastname": "Cena",
"kids": {"item": [
{
"name": "Maria",
"age": "7"
},
{
"name": "Dany",
"age": "3"
}
]}
}
]}
}