Java读取Linux文件：操作指南与UTF-8编码

    //读取本地文件/linux上的文件
    public static StringBuffer readFileByLines(String fileName) {
        String localPath=I.env("/opt/upload/");
        File file = new File(localPath+fileName);
        BufferedReader reader = null;
        StringBuffer sb = new StringBuffer("");//存储文件内容
        InputStreamReader isr;
        try {
            isr = new InputStreamReader(new FileInputStream(file), "utf-8");
            reader = new BufferedReader(isr);
            String tempString = null;
            int line = 1;
            // 一次读一行，读入null时文件结束
            while ((tempString = reader.readLine()) != null) {
                //Thread.sleep(500);
                System.out.println(tempString);
                sb.append(tempString+";");
                line++;
            }
            reader.close();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e1) {
                    e1.printStackTrace();
                }
            }