JAVA文件各行打乱
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给定一个文件,把文件 里的各行打乱,并验证其正确性,时间紧迫,随手写写
String path = "/Users/guangyi.zgy/Desktop/scene_2khas_8kno_query_1W.csv"; List<String> newList=new ArrayList<String>(); //打开文件 File file = new File(path); try { InputStream instream = new FileInputStream(file); if (instream != null) { InputStreamReader inputreader = new InputStreamReader(instream); BufferedReader buffreader = new BufferedReader(inputreader); String line; //分行读取 int j = 0; while (( line = buffreader.readLine()) != null) { newList.add(line); } instream.close(); String[] newA = new String[newList.size()]; for (String str : newList) { Random random = new Random(); int a = random.nextInt(newList.size()); if (newA[a] == null) { newA[a] = str; } else { for (int i = 0; i < newA.length; i++) { if (newA[i] == null) { newA[i] = str; break; } } } } String pathNew = "/Users/guangyi.zgy/Desktop/NEW_scene_2khas_8kno_query_1W.csv"; File fileNew = new File(pathNew); fileNew.createNewFile(); OutputStream outputStream = new FileOutputStream(fileNew); BufferedWriter bf = new BufferedWriter(new OutputStreamWriter(outputStream)); boolean firstLine = true; for (String str : newA) { if (firstLine) { bf.write(str); firstLine = false; continue; } if (str != null) { bf.write(" " + str); } else { System.out.println("有空行出现"); } } bf.close(); for (String str : newA) { int count = 0; for (String str1 : newA) { if (StringUtils.equals(str1.trim(), str.trim())) { count ++; } } if (count > 1) { System.out.println("有多个相同字符"); } } } } catch (java.io.FileNotFoundException e) { } catch (IOException e) { }
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