java 获取字符串的编码 java如何获取字符串

import java.util.Random; 



public class getfreeStr { 


 /** 

 * @param args 

 * Java获取随机字符串 

 */ 

 public static void main(String[] args) { 

 // TODO Auto-generated method stub 


 System.out.println(getRandomString(10)); 

 } 



 public static String getRandomString(int length){ 

 StringBuffer buffer=new StringBuffer("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"); 

 StringBuffer sb=new StringBuffer(); 

 Random r=new Random(); 

 int range=buffer.length(); 

 for(int i=0;i<length;i++){ 

 sb.append(buffer.charAt(r.nextInt(range))); 

 } 

 return sb.toString(); 

 } 


}