public class RandomCode { public static void main(String[] args) { System.out.println("@@@@@@@@@输出的15位随机码@@@@@@@@@@@@@"); 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<5;i++){ //输出5个随机码 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++){ //输入出 15位 的随机码 r = new java.util.Random(); k = r.nextInt(); b.append(String.valueOf(arr[Math.abs(k%76)])); } return b.toString(); } }