昨日有个中文词频统计的需求, 百度一番后, 发现一大堆标题党文章, 讲的与内容严重不符, 这里就简单记录下自己实现的流程吧!
首先添加依赖:
下载jar
- http://maven.nlpcn.org/org/ansj/
- 同时下载nlp-lang.jar
- 导入到eclipse ，开始你的程序吧
maven
<dependency> <groupId>org.ansj</groupId> <artifactId>ansj_seg</artifactId> <version>5.1.1</version> </dependency>基本用法为:
String str = "欢迎使用ansj_seg,(ansj中文分词)在这里如果你遇到什么问题都可以联系我.我一定尽我所能.帮助大家.ansj_seg更快,更准,更自由!" ; System.out.println(ToAnalysis.parse(str)); 欢迎/v,使用/v,ansj/en,_,seg/en,,,(,ansj/en,中文/nz,分词/n,),在/p,这里/r,如果/c,你/r,遇到/v,什么/r,问题/n,都/d,可以/v,联系/v,我/r,./m,我/r,一定/d,尽我所能/l,./m,帮助/v,大家/r,./m,ansj/en,_,seg/en,更快/d,,,更/d,准/a,,,更/d,自由/a,!
下面就贴上代码:
public static void wordFrequency() throws IOException { Map<String, Integer> map = new HashMap<>(); String article = getString(); String result = ToAnalysis.parse(article).toStringWithOutNature(); String[] words = result.split(","); for(String word: words){ String str = word.trim(); // 过滤空白字符 if (str.equals("")) continue; // 过滤一些高频率的符号 else if(str.matches("[）|（|.|，|。|+|-|“|”|：|？|\\s]")) continue; // 此处过滤长度为1的str else if (str.length() < 2) continue; if (!map.containsKey(word)){ map.put(word, 1); } else { int n = map.get(word); map.put(word, ++n); } } Iterator<Map.Entry<String, Integer>> iterator = map.entrySet().iterator(); while (iterator.hasNext()){ Map.Entry<String, Integer> entry = iterator.next(); System.out.println(entry.getKey() + ": " + entry.getValue()); } List<Map.Entry<String, Integer>> list = new ArrayList<>(); Map.Entry<String, Integer> entry; while ((entry = getMax(map)) != null){ list.add(entry); } System.out.println(Arrays.toString(list.toArray())); } /** * 找出map中value最大的entry, 返回此entry, 并在map删除此entry * @param map * @return */ public static Map.Entry<String, Integer> getMax(Map<String, Integer> map){ if (map.size() == 0){ return null; } Map.Entry<String, Integer> maxEntry = null; boolean flag = false; Iterator<Map.Entry<String, Integer>> iterator = map.entrySet().iterator(); while (iterator.hasNext()){ Map.Entry<String, Integer> entry = iterator.next(); if (!flag){ maxEntry = entry; flag = true; } if (entry.getValue() > maxEntry.getValue()){ maxEntry = entry; } } map.remove(maxEntry.getKey()); return maxEntry; } /** * 从文件中读取待分割的文章素材. * 文件内容来自简书热门文章: https://www.jianshu.com/p/5b37403f6ba6 * @return * @throws IOException */ public static String getString() throws IOException { FileInputStream inputStream = new FileInputStream(new File("/home/as_/IdeaProjects/SpringMaven/article-txt")); BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream)); StringBuilder strBuilder = new StringBuilder(); String line; while((line = reader.readLine()) != null){ strBuilder.append(line); } reader.close(); inputStream.close(); return strBuilder.toString(); } 最后依旧附上图片:
