生成随机字符串（code）工具类

UUIDUtils：

package com.duocy.util;

import java.util.Random;
import java.util.UUID;

/*生成随机字符串（code）工具类*/
public class UUIDUtils {

public static String getUUID() {

return UUID.randomUUID().toString().replace("-", "")+UUID.randomUUID().toString().replace("-","");

}

public static String findkeyUtil() {
String str="ABCDEFGHIJKLMNOPQRSTUVWXYZqwertyuiopasdfghjklzxcvbnm0123456789";
StringBuilder st=new StringBuilder(4);
for(int i=0;i<4;i++){
char ch=str.charAt(new Random().nextInt(str.length()));
st.append(ch);
}
String findkey=st.toString().toLowerCase();
System.out.println("生成找回的key为："+st.toString());
return findkey;
}
}

个人记录之用！