中文分词Java简单实现

package helloJavaWorld;

//用栈存取词语
class StackTest {
private Object[] stack;
//元素个数;
private int size;
//默认长度为10;
public StackTest(){
this(10);
}
//也可以自己设置长度,即容量;
public StackTest(int len){
stack = new Object[len];
}
//返回元素个数;
public int size(){
return size;
}
//返回数组长度,即容量;
public int capacity(){
return stack.length;
}
//实现动态的数组;
public void ensureCapacity(){
if(size() == capacity()){
Object[] newStack = new Object[size() * 3 / 2 + 1];
System.arraycopy(stack, 0, newStack, 0, size());
stack = newStack;
}
}
//入栈;
public void push(Object o){
size++;
ensureCapacity();
stack[size - 1] = o;
}
//判空;
public boolean isEmpty(){
return size == 0;
}
//出栈;
public Object pop(){
//首先要判空;
if(isEmpty()){
throw new ArrayIndexOutOfBoundsException("不能为空");
}
Object o = stack[--size];
stack[size] = null;
return o;
}
}

/**
* 建立Split类
* 设置词典内容
* @author zhangliang
*
*/
class Split {
private String[] dictionary = {"我","是","武汉","理工大","理工大学","武汉理工大学","的","一名","二","年级","二年级","学生"};  //词典
private String input = null;

public Split(String input) {
this.input = input;
}
//分词
public void start() {
String temp = null;
StackTest stack = new StackTest(20);
for(int i=0;i<this.input.length();i++) {
temp = this.input.substring(i);
// 每次从字符串开头截取一个字，并存到temp中
// 如果该词在词典中， 则删除该词并在原始字符串中截取该词
if(this.isInDictionary(temp)) {
stack.push(temp);   //入栈
this.input = this.input.replace(temp, "");
i = -1;  // i=-1是因为要重新查找， 而要先执行循环中的i++
}
}

// 当前循环完毕，词的末尾截去一个字，继续循环， 直到词变为空
if(null != this.input && !"".equals(this.input)) {
this.input = this.input.substring(0,this.input.length()-1);
this.start();
}

//出栈
while (!stack.isEmpty()) {
System.out.print(stack.pop() + "  ");}
}

//判断当前词是否在词典中
public boolean isInDictionary(String temp) {
for(int i=0;i<this.dictionary.length;i++) {
if(temp.equals(this.dictionary[i])) {
return true;
}
}
return false;
}
}

public class splitChinsesCharacter {
public static void main(String[] args){
String input = "我是武汉理工大学一名二年级的学生";  // 要匹配的字符串
new Split(input).start();
}
}