json数据存入本地文件以及数据读取

直接复制，带数据测试

public class JsonUtils {

    //从给定位置读取Json文件
    public static String readJson(String path){
        //从给定位置获取文件
        File file = new File(path);
        BufferedReader reader = null;
        //返回值,使用StringBuffer
        StringBuffer data = new StringBuffer();
        //
        try {
            reader = new BufferedReader(new FileReader(file));
            //每次读取文件的缓存
            String temp = null;
            while((temp = reader.readLine()) != null){
                data.append(temp);
                System.out.println(data);
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            //关闭文件流
            if (reader != null){
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return data.toString();
    }

    //给定路径与Json文件，存储到硬盘
    public static void writeJson(String path,Object json,String fileName){
        BufferedWriter writer = null;
        File file = new File(path + fileName);
        //如果文件不存在，则新建一个
        if(!file.exists()){
            try {
                file.createNewFile();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        //写入
        try {
            writer = new BufferedWriter(new FileWriter(file));
            writer.write(json.toString());
        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            try {
                if(writer != null){
                    writer.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
//        System.out.println("文件写入成功！");
    }

    public static void main(String[] args) {
        Map<String,Object> map = new HashMap<String,Object>();
        map.put("name","ggrk");
        map.put("password","123456");
        JSONObject jsonObject = JSONObject.fromObject(map);
        JsonUtils.writeJson("D://",jsonObject,"test.txt");
        JsonUtils.readJson("D://test.txt");
    }