逆向最大匹配中文分词程序，能实现中英文数字混合分词。比如能分出这样的词：bb霜、3室、乐phone、touch4、mp3、T恤

public class RMM2 extends M
{
    public static final HashMap<Character,TreeNode> dic = Dictionary.getRmmdic();
    
    /** *//**
     * @return 返回匹配最长词的长度, 没有找到返回 0.
     */
    public int maxMatch(TreeNode node,char[] sen, int offset) 
    {
        int idx = offset;
        for(int i=offset; i>=0; i--) 
        {
            node = node.subNode(sen[i]);
            if(node != null) 
            {
                if(node.isAlsoLeaf()) 
                    idx = i; 
            }
            else 
                break;
        }
        return idx ;
    }
    
    public ArrayList<Token> getToken(ArrayList<Sentence> list)
    {
        Collections.reverse(list);
        ArrayList<Token> tokenlist=new ArrayList<Token>();
        for(Sentence sen:list)
        {
            int i=sen.getText().length-1;
            while(i>-1)
            {
                TreeNode n=dic.get(sen.getText()[i]);
                if(n!=null)
                {
                    int j=maxMatch(n, sen.getText(),i);
                    if(j<i)
                    {
                        Token token = new Token(new String(sen.getText(),j,i-j+1),sen.getStartOffset()+j,sen.getStartOffset()+i+1);
                        tokenlist.add(token);
                        i=j-1;
                    }
                    else
                    {
                        Token token = new Token(new String(sen.getText(),i,1),sen.getStartOffset()+i,sen.getStartOffset()+i+1);
                        tokenlist.add(token);
                        i--;
                    }
                }
                else
                {
                    Token token = new Token(new String(sen.getText(),i,1),sen.getStartOffset()+i,sen.getStartOffset()+i+1);
                    tokenlist.add(token);
                    i--;
                }
            }
        }
        Collections.reverse(tokenlist);
        return tokenlist;
    }
}