java - 如何使用 String 类型的变量创建 JSON 文件

Question

我有一个 String 类型的变量，我需要使用该变量创建一个 json 文件。

我需要创建包含变量“结果”内容的JSON文件。

希望您能帮助我!

提前致谢!

@TargetApi(Build.VERSION_CODES.KITKAT)
public String showResult(View v) throws IOException {

        String  result = "";

        Gson json = new Gson();
        for (Planet p : plAdapter.getBox()) {
            if (p.isSelected()){
                /*json.put("name",p.getName());
                json.put("distance",p.getDistance());
                json.put("quantity",p.getQuantità());*/
                result=result+json.toJson(p);


            }
        }
         //result=json.toString();

        String path = Environment.getExternalStorageDirectory()
                .getAbsolutePath() + "/droidText/";

        //FileWriter file=null;

    /*  try {
            file = new FileWriter(path+"filename5.json");
            file.write(result);


        }catch(IOException ie){}
        finally{


            file.flush();
            file.close();
        }*/try(FileWriter file = new FileWriter(path + "filename.json"))  {
        //  file=new FileWriter(path+"filename100.json");
        /*FileWriter file = new FileWriter(path+"filename31.json");
            file.write(result);
        file.close();
        */
            json.toJson(result);
            //System.out.println("Successfully wrote Json result to file.");
        /*catch(IOException r){

        }*/
        }catch (IOException e){

        }
        System.out.println(result);
        return result;

    }

Answer 1

public static String showResult(View v) {
        String  result = "";
        JsonObject json = new JsonObject():
         for (Planet p : plAdapter.getBox()) {
                    if (p.isSelected()){
                       json.put("name",p.getName());
                       json.put("distance",p.getDistance());
                       json.put("quantity",p.getQuantità());
                    }
           }
         result = json.toString();
         FileWriter file = null;
         try { 
                file = new FileWriter("/path/filename.json");
                file.write(result); 
         }catch(IOException ie){}
         finally{ 
           file.flush();
           file.close();
         }
     return result;
}