今日作业

思路：先建立两个文本，利用字符输入和字符输出进行文件的读取和导入，中间利用循环进行单词的检验数目，最后输出。
感想：利用图书馆的书进行了文件导入和导出的代码编写，中间的细节在网上查询了很多知识与点。感觉这次真的学到很多。





package j;

	import java.io.BufferedReader;
	import java.io.BufferedWriter;
	import java.io.FileReader;
	import java.io.FileWriter;
	import java.io.IOException;
	import java.util.Iterator;
	import java.util.TreeMap;
	import java.util.regex.Matcher;
	import java.util.regex.Pattern;
	public class lolo{

		public static void main(String[] args) throws IOException {
			String addr="C:/jhl/lol.txt"; 
			BufferedReader bufr = new BufferedReader(new FileReader(addr));
			StringBuffer sbuf = new StringBuffer();
			String line = null;
			while ((line = bufr.readLine()) != null) {
				sbuf.append(line);
			}
			bufr.close();
			Pattern expression = Pattern.compile("[a-zA-Z]+");
			String str1 = sbuf.toString().toLowerCase();
			Matcher matcher = expression.matcher(str1);
			TreeMap myTreeMap = new TreeMap();
			int n = 0;
			Object word = null;
			Object num = null;
			while (matcher.find()) {
				word = matcher.group();
				n++;
				if (myTreeMap.containsKey(word)) {
					num = myTreeMap.get(word);
					Integer count = (Integer) num;
					myTreeMap.put(word, count.intValue() + 1);
				} else {
					myTreeMap.put(word, new Integer(1));
				}
			}
			System.out.println("文章内容如下：");
			System.out.println(str1);
			System.out.println("统计分析如下：");
			System.out.println("文章中单词总数:" + n+"个");
			System.out.println("具体的信息在当前目录的lwl.txt文件中");
			BufferedWriter bufw=new BufferedWriter(new FileWriter("C:/jhl/lwl.txt"));
			Iterator iter=myTreeMap.keySet().iterator()；
			Object key=null;
			bufw.write("文件来自:"+addr+"内容如下：");
			bufw.write(sbuf.toString());
			bufw.newLine();
			while(iter.hasNext()){
				 key=iter.next();
				 System.out.println(key+":"+myTreeMap.get(key));
				 
				 bufw.write((String)key+":"+myTreeMap.get(key));
				 bufw.newLine();
			}
			bufw.write("统计分析如下：");
			bufw.write("文章中单词总数:" + n+"个");
			bufw.newLine();
			bufw.write("文章中不同单词总数:" + myTreeMap.size()+"个");
			bufw.close();
		
}}