java 将英文文章 按句子，标点符号分割，正则表达式

package com.gao;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class TestMain {

	private static final int MIN_THRESHOLD = 50;
	private static final int MAX_THRESHOLD = 80;
	private static List<String>  list = new ArrayList<String>();
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		String str = null;
		try {

			InputStreamReader isr = new InputStreamReader(new FileInputStream(new File("D:\\Users\\gao\\Desktop\\1.txt")),Charset.defaultCharset());
			BufferedReader br = new BufferedReader(isr);

			StringBuffer sb = new StringBuffer(MAX_THRESHOLD);

			while ((str=br.readLine())!=null) {
				//String [] substrs = str.split("。|\\？|\\！|\\?|\\.|!");
				/*正则表达式：句子结束符*/
				String regEx="[。？！?.!]";
				Pattern p =Pattern.compile(regEx);
				Matcher m = p.matcher(str);

				/*按照句子结束符分割句子*/
				String[] substrs = p.split(str);

				/*将句子结束符连接到相应的句子后*/
				if(substrs.length > 0)
				{
				    int count = 0;
				    while(count < substrs.length)
				    {
				        if(m.find())
				        {
				        	substrs[count] += m.group();
				        }
				        count++;
				    }
				}
//	              //String [] substrs = str.split("[。？！?.!]");
 				for (int i=0;i<substrs.length;i++) {

					if (substrs[i].length()<MIN_THRESHOLD) {	//语句小于要求的分割粒度
						sb.append(substrs[i]);
						//sb.append("||");
						if (sb.length()>MIN_THRESHOLD) {
							//System.out.println("A New TU: " + sb.toString());
							list.add(sb.toString());
							sb.delete(0, sb.length());
						}
					}
					else {	//语句满足要求的分割粒度
							if(sb.length()!=0)	//此时如果缓存有内容则应该先将缓存存入再存substrs[i]的内容  以保证原文顺序
							{
								list.add(sb.toString());
								//System.out.println("A New Tu:"+sb.toString());
								sb.delete(0, sb.length());
							}
								list.add(substrs[i]);
								//System.out.println("A New Tu:"+substrs[i]);
					}
				}
			}
			br.close();
			isr.close();

			//将分割好的tu放入List中以便传入数据库
			for (Iterator i = list.iterator(); i.hasNext();){
				   System.out.println(i.next());
				 }
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}