对map里的数据进行排序

来源：互联网发布：java企业门户网站源码编辑：程序博客网时间：2024/05/18 04:49
    long t1 = System.currentTimeMillis();    String s;    String fileName1 = "G:/caseDetail.txt";    String fileName2 = "G:/result.txt";    try {      BufferedReader br = new BufferedReader(new FileReader(fileName1));      BufferedWriter bw = new BufferedWriter(new FileWriter(fileName2));      StringBuffer sb = new StringBuffer();      // 将文件内容存入StringBuffer中      while ((s = br.readLine()) != null) {        sb.append(s);      }      String str = sb.toString();      Vector<String> vString = AemanticAnalysisUtil.participle(str, true);      // 分隔字符串并存入数组      int count = 0;      Map<String, Integer> myTreeMap = new TreeMap<String, Integer>();      // 遍历数组将其存入Map<String, Integer>中      for (int i = 0; i < vString.size(); i++) {        if(vString.get(i).length()==1||vString.get(i).equals("案件")||vString.get(i).equals("详情")){          continue;        }        if (myTreeMap.containsKey(vString.get(i))) {          count = myTreeMap.get(vString.get(i));          myTreeMap.put(vString.get(i), count + 1);        } else {          myTreeMap.put(vString.get(i), 1);        }      }      System.out.println("单词统计的结果请见当前目录result.txt文件");      // 将map.entrySet()转换成list      List<Map.Entry<String, Integer>> list = new ArrayList<Map.Entry<String, Integer>>(myTreeMap.entrySet());      // 通过比较器实现排序      Collections.sort(list, new Comparator<Map.Entry<String, Integer>>() {        // 降序排序        public int compare(Entry<String, Integer> o1, Entry<String, Integer> o2) {          return o2.getValue().compareTo(o1.getValue());        }      });      int num = 1;      // 将结果写入文件      for (Map.Entry<String, Integer> map : list) {        if (map.getValue()>100) {          bw.write("出现次数第" + num + "的单词为：" + map.getKey() + "，出现频率为" + map.getValue() + "次");          bw.newLine();          System.out.println(map.getKey() + ":" + map.getValue());          num++;        }      }      bw.write("耗时：" + (System.currentTimeMillis() - t1) + "ms");      br.close();      bw.close();      System.out.println("耗时：" + (System.currentTimeMillis() - t1) + "ms");    } catch (Exception e) {      e.printStackTrace();    }
阅读全文
0 0