随机产生字符串

random.java

package com.kaishengit;

import java.util.Random;
import java.util.TimeZone;

import com.kaishengit.pojo.User;
import com.kaishengit.util.DateUtil;

import hirondelle.date4j.DateTime;


public class Test {
	private static String ssource = "abcdefghijklmnopqrstuvwxyz" + "0123456789";
	private static char[] src = ssource.toCharArray();


	/**
     * 产生随机字符串
     * 
     * @param length
     * @return
     */
    public static String getCode(int length)
    {
    	Random r = new Random();       
    	char[] buf = new char[length];
        int rnd;
        for (int i = 0; i < length; i++)
        {
            rnd = Math.abs(r.nextInt()) % src.length;

            buf[i] = src[rnd];
        }
        return new String(buf);
    }
    
    public static void main(String[] args) {
    	String str = getCode(3);
    	System.out.println(str);
	}
    
    

}