读写文件 #java

readAndWrite.java

    @Test
    public void toUpyunLog2() throws Exception {
        InputStream in = getClass().getResourceAsStream("/aliyun-3");
        BufferedReader in2 = new BufferedReader(new InputStreamReader(in));
        String lineTxt;
        // System.getProperty("user.home") 获取用户主目录
        File file = new File(System.getProperty("user.home") + "/aliyun-3-wanted");
        // 文件不存在则创建
        file.createNewFile();
        FileWriter fw = new FileWriter(file);
        BufferedWriter bw = new BufferedWriter(fw);
        int counter = 0;
        while ((lineTxt = in2.readLine()) != null) {
            counter++;
            String line = ins.toUpyunLog(lineTxt);
            // 需要写入分隔符 \n
            bw.write(line + "\n");
        }
        //一定要关闭文件，否则可能有数据留在 buffer 中导致文件内容不完整
        bw.close();
        fw.close();
        System.out.println(counter);
    }