matrix.java

playfair加密简单实现 生成密钥矩阵,加密解密

package playFair;

import java.util.Vector;

public class Matrix {
	private String initKey;
	private char[]c;
	private char [][] matrix = new char[5][5];
	Vector initAlphabet = new Vector();
	Matrix(String s){
		String a ="abcdefghijklmnoprstuvwxyz";
		c = a.toCharArray();
		this.initKey=s;
		this.createMatrix();
	}
	public void createMatrix(){
        char []k=initKey.toCharArray();
        for(int i=0;i<k.length;i++)
        {
        
        	boolean flag=false;
        	if((k[i]>='a'&&k[i]<='z')) {    
            for(int j=0;j<initAlphabet.size();j++)
            {
                if(String.valueOf(k[i]).equals(String.valueOf(initAlphabet.elementAt(j))))
                	flag=true;
            }
            if(flag==false)
            	
            	initAlphabet.add(k[i]);
        	}
        	
        }
        for(int i=0;i<c.length;i++)
        {
            boolean flag=false;
            for(int j=0;j<initAlphabet.size();j++)
            {
                if(String.valueOf(c[i]).equals(String.valueOf(initAlphabet.elementAt(j))))
                    flag=true;
            }
            if(flag==false)
            	initAlphabet.add(c[i]);
        }
        int num=0;
        for(int i=0;i<matrix.length;i++)
        {
            for(int j=0;j<matrix[i].length;j++)
            {
                char[] temp=initAlphabet.elementAt(num).toString().toCharArray();
                matrix[i][j]=temp[0];
                num++;
            }
        }
		
	}
	public char[][] getMatrix()
    {
		return matrix;
    }

}