java 生成随机码 转

java 生成15位的随机码

import java.util.ArrayList;
import java.util.List;

public class GeneratePswd {

	@SuppressWarnings({ "unchecked", "unchecked" })
	public static void main(String[] args) {

		StringBuffer buf = new StringBuffer("a,b,c,d,e,f,g,h,i,g,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z");
		buf.append(",A,B,C,D,E,F,G,H,I,G,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z");
		buf.append(",~,@,#,$,%,^,&,*,(,),_,+,|,`,.");
		buf.append(",1,2,3,4,5,6,7,8,9,0");

		String[] arr = buf.toString().split(",");
		List pswdList = new ArrayList();
		
		for(int i=0;i<50;i++){
			pswdList.add(getPswd(arr));
		}
		
		for(int i=0;i<pswdList.size();i++){
			System.out.println(pswdList.get(i));
		}
	}
	
	public static String getPswd(String[] arr){
		StringBuffer b = new StringBuffer();
		java.util.Random r;
		int k ;
		for(int i=0;i<15;i++){
			 r = new java.util.Random();
			 k = r.nextInt();
			 b.append(String.valueOf(arr[Math.abs(k % 76)]));
		}
		
		return b.toString();
	}

}