解析Chrome书签Json文件:Java [英] Parsing Chrome Bookmarks Json file : Java

问题描述

当前，我正在使用netbeans IDE.我尝试使用其他解决方案，但到目前为止还算运气.

Currently I am using netbeans IDE. I tried using other solution, but to no luck so far.

问题是，当我尝试从Google Chrome书签文件(C:\ Users \ Admin \ AppData \ Local \ Google \ Chrome \ User Data中读取Json文件时遇到错误\ Default \书签)

Problem is, i am facing errors when trying to read the Json file from google Chrome bookmarks file (C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Bookmarks)

p/s:尽管没有以书签"的名义编写的文件类型，但其内容被称为JSON

p/s: although there is no file type written in the name of Bookmarks, its content have been known as JSON

这是Bookmarks.json中的内容:

This is the what inside the Bookmarks.json:

{
   "checksum": "20fdfad51db6d3199f8a09c3220dd93b",
   "roots": {
      "bookmark_bar": {
         "children": [ {
            "date_added": "13124893413824227",
            "id": "6",
            "name": "YouTube",
            "type": "url",
            "url": "https://www.youtube.com/"
         }, {
            "date_added": "13124893435163243",
            "id": "7",
            "name": "Welcome to Facebook",
            "type": "url",
            "url": "https://www.facebook.com/"
         } ],
         "date_added": "13124893381424539",
         "date_modified": "13124893435163243",
         "id": "1",
         "name": "Bookmarks bar",
         "type": "folder"
      },
      "other": {
         "children": [  ],
         "date_added": "13124893381424547",
         "date_modified": "0",
         "id": "2",
         "name": "Other bookmarks",
         "type": "folder"
      },
      "synced": {
         "children": [  ],
         "date_added": "13124893381424550",
         "date_modified": "0",
         "id": "3",
         "name": "Mobile bookmarks",
         "type": "folder"
      }
   },
   "version": 1
}

这是我的代码(JsonParser.java):

And here is my code (JsonParser.java):

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Iterator;
import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;

public class JsonParser{
    private static String jsonFile = "C:\\Users\\Admin\\AppData\\Local\\Google\\Chrome\\User Data\\Default\\Bookmarks";

    public static void main (String[] args) {

        try {
            FileReader reader = new FileReader (jsonFile); //access the file
            JSONObject jsonObject = (JSONObject) new JSONParser().parse(reader);

                      String c =(String) jsonObject.get("checksum"); //place
            //        String r =(String) jsonObject.get("roots"); //place

           //   String r =(String) jsonObject.get("children"); //place


                        System.out.println("check: " + c);
                        //System.out.println("roots: " + r);
                       JSONArray lang = (JSONArray) jsonObject.get("roots"); 
            for (int i=0; i<lang.size(); i++) {
            System.out.println ("Url Name : " + lang.get(i)+"\n");
            }       //data in the array
            }  catch (FileNotFoundException e) {
                                e.printStackTrace();
                    } catch (IOException e) {
                                e.printStackTrace();
                    } catch (ParseException e) {
                                e.printStackTrace();
                    }
    }
}

由于某些原因，当我运行代码时，这些是我得到的错误:

For some reason when I run the code these are the errors I got:

check: 4d55f8a0888f7dd918a702eda2821ccd
Exception in thread "main" java.lang.ClassCastException: org.json.simple.JSONObject cannot be cast to org.json.simple.JSONArray
at JsonParser.main(JsonParser.java:28)
C:\Users\Admin\Documents\NetBeansProjects\Keep-It\nbproject\build-impl.xml:1051: The following error occurred while executing this line:
C:\Users\Admin\Documents\NetBeansProjects\Keep-It\nbproject\build-impl.xml:805: Java returned: 1
BUILD FAILED (total time: 2 seconds)

如您所见，只有 校验和 成功读取，但是 根 失败并给出了这些错误.

As you can see, only checksum succeed in being read, but the roots failed and gave out these errors.

您还应该注意，我输入了一些代码作为 评论 ，这些是我尝试过的但仍然出现错误的代码.

You should also notice that there are some codes I put as comments, those are things i tried but still got the errors.

我希望有人能帮助我使这些工作正常进行. 非常感谢您的帮助

I hope anyone can help me to get these things working. Thank you very much for helping

推荐答案

问题是，您不能像(JSONArray) jsonObject.get("roots");那样将对象强制转换为数组，必须遵循以下结构，以便根据对象和数组进行解析，如下所示

Issue is , you cannot cast object to array like (JSONArray) jsonObject.get("roots"); you have to follow the structure so parse according to object and array as shown below

 JSONObject jsonObject = (JSONObject) new JSONParser().parse(reader);
 String checksum =jsonObject.optString("checksum");

 //  get root object
 JSONObject root = jsonObject.getJSONObject("roots");

 //  get root bookmarks object from root
 JSONObject bookmarks = root.getJSONObject("bookmark_bar");

 //  get root children array from bookmarks 
 JSONArray  childrens = bookmarks.getJSONArray("children");

 JSONObject temp ;
  for (int i=0; i<childrens.size(); i++) {
      // get object using index from childrens array
      temp = childrens.getJSONObject(i);

      // get url
      String url = temp.optString("url");
  }

按照您的结构进行

JObject => root 
               root  JSONObject has : bookmark_bar JSONObject 
               bookmark_bar JSONObject has  : children JSONArray
               children JSONArray has JSONObject which further has String: url

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