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  • 读取数据文件

    /* 以 Stream后缀结尾 的都为 字节流, 而以Reader或Writer后缀结尾的叫做字符流 */
    class TestFileReaderWriter {
    
        public void copyfile() {
            int c = 0;
            try {
                
                BufferedReader br = new BufferedReader(new FileReader("E:/Postgraduate/Cluster of Qiao's thesis/social network/dataset/irise-BufferedReaderWriter.txt"));//缓冲流,效率更高
                BufferedWriter bw = new BufferedWriter(new FileWriter("E:/Postgraduate/Cluster of Qiao's thesis/social network/dataset/irise-BufferedReaderWriter.txt"));
                String s = null;
                
                for (int i = 0; i < 100; i++) {
                    s=String.valueOf(Math.random());
                    bw.write(s);
                    bw.newLine();
                }
                bw.flush();
                while((s = br.readLine())!=null) 
                    System.out.println(s);
                bw.close();
                br.close();
            } catch (FileNotFoundException e) {
                System.out.println("找不到指定文件");
            } catch (IOException e) {
                System.out.println("文件读取错误");
            }
            System.out.println("文件已经复制");
        }
    }
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  • 原文地址:https://www.cnblogs.com/pacoson/p/4491953.html
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