java中文分词之正向最大匹配法实例代码

package com; 
import java.util.ArrayList; 
import java.util.List; 
public class Segmentation1 { 
 private List<String> dictionary = new ArrayList<String>(); 
 private String request = "北京大学生前来应聘"; 
 public void setDictionary() { 
 dictionary.add("北京"); 
 dictionary.add("北京大学"); 
 dictionary.add("大学"); 
 dictionary.add("大学生"); 
 dictionary.add("生前"); 
 dictionary.add("前来"); 
 dictionary.add("应聘"); 
 } 
 public String leftMax() { 
 String response = ""; 
 String s = ""; 
 for(int i=0; i<request.length(); i++) { 
  s += request.charAt(i); 
  if(isIn(s, dictionary) && aheadCount(s, dictionary)==1) { 
  response += (s + "/"); 
  s = ""; 
  } else if(aheadCount(s, dictionary) > 0) { 
  } else { 
  response += (s + "/"); 
  s = ""; 
  } 
 } 
 return response; 
 } 
 private boolean isIn(String s, List<String> list) { 
 for(int i=0; i<list.size(); i++) { 
  if(s.equals(list.get(i))) return true; 
 } 
 return false; 
 } 
 private int aheadCount(String s, List<String> list) { 
 int count = 0; 
 for(int i=0; i<list.size(); i++) { 
  if((s.length()<=list.get(i).length()) && (s.equals(list.get(i).substring(0, s.length())))) count ++; 
 } 
 return count; 
 } 
 public static void main(String[] args) { 
 Segmentation1 seg = new Segmentation1(); 
 seg.setDictionary(); 
 String response1 = seg.leftMax(); 
 System.out.println(response1); 
 } 
}