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();
      }
}