需求：根据预先定义好的嵌套的key值一层层获取json最底层数据
主函数里的代码
String json1="{"code":0,"data":{"cid":"","cstatus":-1,"doc":1,"docsProtocolRead":0,"funcSwitch":"1","hasGiftPacks":false,"headIcon":"","isUpdate":false,"live":0,"loginToken":"e3ip3mfp-41q7-n5fq-n830-b57df8d7a677","nickName":"V友14743636","sid":"e3ip3mfp-41q7-n5fq-n830-b57df8d7a677","signStatus":1,"subCount":0,"tagLibs":[{"corner":0,"id":9001,"isVivaCity":0,"name":"畅读","specialIndex":1,"specialType":1,"type":1},{"corner":0,"id":143,"isVivaCity":0,"name":"我的","specialIndex":2,"specialType":1,"type":1},{"corner":2,"id":141,"isVivaCity":0,"name":"文化","specialIndex":0,"specialType":0,"type":1},{"corner":1,"id":182570,"isVivaCity":0,"name":"科技","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":144,"isVivaCity":0,"name":"畅读号","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":40000,"isVivaCity":0,"name":"视频精选","specialIndex":0,"specialType":0,"type":1},{"corner":2,"id":163,"isVivaCity":0,"name":"直播","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":31,"isVivaCity":0,"name":"精读","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":156,"isVivaCity":0,"name":"中医","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":11,"isVivaCity":0,"name":"军事","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":45,"isVivaCity":0,"name":"历史","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":152,"isVivaCity":0,"name":"国学","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":3,"isVivaCity":0,"name":"娱乐","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":140,"isVivaCity":0,"name":"财经","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":12,"isVivaCity":0,"name":"数码","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":6,"isVivaCity":0,"name":"汽车","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":158,"isVivaCity":0,"name":"收藏","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":5,"isVivaCity":0,"name":"体育","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":149,"isVivaCity":0,"name":"书法","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":159,"isVivaCity":0,"name":"绘画","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":146,"isVivaCity":0,"name":"读书","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":7,"isVivaCity":0,"name":"生活","specialIndex":0,"specialType":0,"type":1},{"corner":1,"id":167,"isVivaCity":0,"name":"美食美酒","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":4,"isVivaCity":0,"name":"时尚","specialIndex":0,"specialType":0,"type":1},{"corner":0,"id":20001,"isVivaCity":0,"name":"GQ男士网","specialIndex":3,"specialType":0,"type":10},{"corner":0,"id":21147,"isVivaCity":0,"name":"故事会","specialIndex":4,"specialType":0,"type":10},{"corner":0,"id":20007,"isVivaCity":0,"name":"ELLE中文网","specialIndex":5,"specialType":0,"type":10},{"corner":0,"id":21079,"isVivaCity":0,"name":"时尚网","specialIndex":6,"specialType":0,"type":10},{"corner":0,"id":21041,"isVivaCity":0,"name":"环球网","specialIndex":7,"specialType":0,"type":10},{"corner":0,"id":20008,"isVivaCity":0,"name":"名车志","specialIndex":8,"specialType":0,"type":10},{"corner":0,"id":21021,"isVivaCity":0,"name":"绘本家居","specialIndex":9,"specialType":0,"type":10},{"corner":0,"id":21120,"isVivaCity":0,"name":"17173游戏网","specialIndex":10,"specialType":0,"type":10},{"corner":0,"id":21312,"isVivaCity":0,"name":"手机中国","specialIndex":11,"specialType":0,"type":10},{"corner":0,"id":21326,"isVivaCity":0,"name":"穷游网","specialIndex":12,"specialType":0,"type":10},{"corner":0,"id":21136,"isVivaCity":0,"name":"微在趣闻社","specialIndex":13,"specialType":0,"type":10},{"corner":0,"id":21244,"isVivaCity":0,"name":"崔玉涛的育学园","specialIndex":14,"specialType":0,"type":10},{"corner":0,"id":21238,"isVivaCity":0,"name":"yoka时尚","specialIndex":15,"specialType":0,"type":10},{"corner":0,"id":21294,"isVivaCity":0,"name":"玩车教授","specialIndex":16,"specialType":0,"type":10},{"corner":0,"id":21058,"isVivaCity":0,"name":"时尚COSMO中文网","specialIndex":17,"specialType":0,"type":10},{"corner":0,"id":21178,"isVivaCity":0,"name":"丁道师","specialIndex":18,"specialType":0,"type":10},{"corner":0,"id":21160,"isVivaCity":0,"name":"万能的大熊","specialIndex":19,"specialType":0,"type":10},{"corner":0,"id":21024,"isVivaCity":0,"name":"色影无忌","specialIndex":20,"specialType":0,"type":10}],"tagName":"","tk":"96ipemcp-74q5-n73q-n8b1-d2728326872c","traceFlag":1,"type":1,"uid":14743636,"upgradeInfo":{"dataType":1,"isUpd":false,"msg":"此版本已经是最新版本.","picList":[],"type":0,"url":"","version":""},"verificationFlag":false,"videoTags":[{"bannerSequence":0,"corner":0,"cover":"","coverUrl":"","createdAt":0,"desc":"","id":40007,"index":0,"isMark":false,"isSubscribed":false,"isUpdated":false,"isVivaCity":0,"lastUpdate":0,"logo":"","logoBlank":"","logoDay":"","logoHotMedia":"","logoNight":"","name":"原创","recoHotMedia":0,"subCount":0,"topSequence":0,"type":4,"uid":0},{"bannerSequence":0,"corner":2,"cover":"","coverUrl":"","createdAt":0,"desc":"","id":163,"index":0,"isMark":false,"isSubscribed":false,"isUpdated":false,"isVivaCity":0,"lastUpdat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String rule1="data,tagLibs[]";//待提取的key值
try {
String temp = dealWithRule(json3,rule1);
Log.i(TAG, "获取到的数据："+temp);
} catch (JSONException e) {
e.printStackTrace();
}
调用的两个方法
/**
* 根据参数rule的规则提取json数据
* @param jsonString 待解析的json数据
* @param rule jsonString的逐层key值，如，rule1="data,tagLibs[]";表示获取jsonString下data里tagLibs数组的某一个。[]标识获取JSONArray，否则获取JSONObject
* @return 返回JSONObject的toString格式
* @throws JSONException
*/
private String dealWithRule(String jsonString, String rule) throws JSONException {
String[] rules = rule.split(",");
for (String key :
rules) {
if (!key.contains("[]")){
jsonString = parseJson(jsonString,0,key);//递归
}else {
jsonString = parseJson(jsonString,1,key.substring(0,(key.length()-2)));
}
}
return jsonString;
}
/**
* 根据key值获取数据
* @param jsonStr
* @param type 0标识获取JSONObject，1标识获取JSONArray
* @param key JSONObject的key值
* @return 无论是JSONObject还是JSONArray，都在最后toString,因为还不知道泛型怎么用
* @throws JSONException
*/
public String parseJson(String jsonStr,int type,String key) throws JSONException {
JSONObject jsonObject = new JSONObject(jsonStr);
if (type==0){
JSONObject jsonObject1= (JSONObject) jsonObject.get(key);
return jsonObject1.toString();
}else {
JSONArray jsonObject1= jsonObject.getJSONArray(key);
int length = jsonObject1.length();
Random rand = new Random();
int random = rand.nextInt(length);
MyLog.i(TAG,"random="+random);
JSONObject jsonObject2 = (JSONObject) jsonObject1.get(random);
return jsonObject2.toString();
}
}
改后的代码
两个方法：
private JSONObject dealWithRule1(JSONObject jsonObject, String rule) throws JSONException {
String[] rules = rule.split(",");
for (String key :
rules) {
if (!key.contains("[]")){
jsonObject = parseJson1(jsonObject,0,key);//递归
}else {
jsonObject = parseJson1(jsonObject,1,key.substring(0,(key.length()-2)));
}
}
return jsonObject;
}
public JSONObject parseJson1(JSONObject jsonStr,int type,String key) throws JSONException {
if (type==0){
JSONObject jsonObject1= (JSONObject) jsonStr.get(key);
return jsonObject1;
}else {
JSONArray jsonObject1= jsonStr.getJSONArray(key);
int length = jsonObject1.length();
Random rand = new Random();
int random = rand.nextInt(length);
MyLog.i(TAG,"random="+random);
JSONObject jsonObject2 = (JSONObject) jsonObject1.get(random);
return jsonObject2;
}
}
