单词统计作业
1 package j; 2 3 import java.io.BufferedReader; 4 import java.io.BufferedWriter; 5 import java.io.FileReader; 6 import java.io.FileWriter; 7 import java.io.IOException; 8 import java.util.Iterator; 9 import java.util.TreeMap; 10 import java.util.regex.Matcher; 11 import java.util.regex.Pattern; 12 public class lolo{ 13 14 public static void main(String[] args) throws IOException { 15 String addr="C:/cjf/123.txt"; 16 BufferedReader bufr = new BufferedReader(new FileReader(addr)); 17 StringBuffer sbuf = new StringBuffer()； 18 String line = null; 19 while ((line = bufr.readLine()) != null) { 20 sbuf.append(line); 21 } 22 bufr.close(); 23 Pattern expression = Pattern.compile("[a-zA-Z]+"); 24 String str1 = sbuf.toString().toLowerCase(); 25 Matcher matcher = expression.matcher(str1); 26 TreeMap myTreeMap = new TreeMap(); 27 int n = 0; 28 Object word = null; 29 Object num = null; 30 while (matcher.find()) { 31 word = matcher.group(); 32 n++; 33 if (myTreeMap.containsKey(word)) { 34 num = myTreeMap.get(word); 35 Integer count = (Integer) num; 36 myTreeMap.put(word, count.intValue() + 1); 37 } else { 38 myTreeMap.put(word, new Integer(1)); 39 } 40 } 41 System.out.println("文章内容如下："); 42 System.out.println(str1); 43 System.out.println("统计分析如下："); 44 System.out.println("文章中单词总数:" + n+"个"); 45 System.out.println("具体的信息在当前目录的lwl.txt文件中"); 46 BufferedWriter bufw=new BufferedWriter(new FileWriter("C:/cjf/456.txt")); 47 Iterator iter=myTreeMap.keySet().iterator(); 48 Object key=null; 49 bufw.write("文件来自:"+addr+"内容如下："); 50 bufw.write(sbuf.toString()); 51 bufw.newLine(); 52 while(iter.hasNext()){ 53 key=iter.next(); 54 System.out.println(key+":"+myTreeMap.get(key)); 55 56 bufw.write((String)key+":"+myTreeMap.get(key)); 57 bufw.newLine(); 58 } 59 bufw.write("统计分析如下："); 60 bufw.write("文章中单词总数:" + n+"个"); 61 bufw.newLine(); 62 bufw.write("文章中不同单词总数:" + myTreeMap.size()+"个"); 63 bufw.close(); 64 65 }}
思路：在程序外建两个写英文段落的txt文档，用于程序内访问使用，中间的核心代码参考了网上的方法；
感想：建立文档很容易，在程序中使用也参考资料就很容易掌握，关键是中间的核心操作代码参考了网上的代码，虽然是看懂了，但还是缺乏自己思考的能力，以后还是要练习。
