JAVA读写文件

     /**
     * 
     * @Description: 写文件
     * @param @param url 要写到服务器的路径
     * @param @param fileName 要写的文件名 需要加前缀 如 .txt
     * @param @param bodydata 要写的内容 
     * @param @return 成功返回1 失败返回0
     * @return String
     */
    public static String  writeFile (String url,String fileName,byte[] bodydata){
        StringBuffer sb = new StringBuffer();
        String message = "";
        try{
            sb.append(url).append(fileName);
            BufferedWriter  bw = new BufferedWriter(new OutputStreamWriter(new BufferedOutputStream(new FileOutputStream(sb.toString(), true)), "UTF-8"));
                bw.write(new String(bodydata,"UTF-8"));
            message = "1";
            bw.flush();
            bw.close();
            System.out.println("运行完毕！！！");
        }catch(Exception e){
            message = "0";
            e.printStackTrace();
        }
        return message;
    }

      /**
     * 
     * @Description: 读文件
     * @param @param filename 文件路径名加文件名
     * @param @return 
     * @return byte[]
     */
    public static byte[] readFileByte(String filename){  
        BufferedInputStream in = null; 
        ByteArrayOutputStream bos = null;
        try{
            File file = new File(filename);  
            if(file.isFile() && file.exists()){ //判断文件是否存在
                bos = new ByteArrayOutputStream((int)file.length());  
                in = new BufferedInputStream(new FileInputStream(file));  
                int buf_size = 1024;  
                byte[] buffer = new byte[buf_size];  
                int len = 0;  
                while(-1 != (len = in.read(buffer,0,buf_size))){  
                    bos.write(buffer,0,len);  
                }  
            }else{
                System.out.println("找不到指定的文件");
            }
            in.close(); 
            bos.close(); 
        }catch(Exception e){
            e.printStackTrace();
        }
        return bos.toByteArray();  
     }

      /**
     * 
     * @Description: 读文件
     * @param @param filepath 要读的文件的路径加文件名称
     * @param @param encoding 编码格式
     * @param @return 成功返回 1 失败返回 0
     * @return String
     */
    public static String readFileLine(String filepath,String encoding) {
        String message = "";
        try {
            File file=new File(filepath);
            if(file.isFile() && file.exists()){ //判断文件是否存在
                InputStreamReader read = new InputStreamReader(new FileInputStream(file),encoding);//考虑到编码格式
                BufferedReader bufferedReader = new BufferedReader(read);
                String lineTxt = null;
                while((lineTxt = bufferedReader.readLine()) != null){
                    System.out.println(lineTxt);
                }
                read.close();
            }else{
                System.out.println("找不到指定的文件");
            }
         }catch (Exception e) {
             System.out.println("读取文件内容出错");
             e.printStackTrace();
         }
        return message;
    }