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用以下代码生成文件名即可

 1 package info.haowei.util;
 2 
 3 import java.text.SimpleDateFormat;
 4 import java.util.Date;
 5 import java.util.Random;
 6 
 7 public class IPTimeStamp {
 8 
 9     
10     private SimpleDateFormat sdf = null;
11     private String ip = null;
12     
13     
14     public IPTimeStamp(String ip) {
15         super();
16     
17         this.ip = ip;
18     }
19 
20 
21     public IPTimeStamp() {
22         super();
23     }
24     
25     
26     public String getIPTimeRand(){
27         StringBuffer buf = new StringBuffer();
28         if(this.ip != null){
29             String s[] = this.ip.split("\\.");//根据ip以点分割将IP中的数字提取
30             for(int i = 0 ; i < s.length; i++){
31                 buf.append(this.addZero(s[i], 3));//不够三位数的补零
32             }
33         }
34         buf.append(this.getTimeStamp());
35         Random r = new Random();//再在结尾加上三个随机数
36         for(int i = 0 ; i < 3 ; i++ ){
37             buf.append(r.nextInt(10));
38         }
39         return buf.toString();
40     }
41     
42     private String addZero(String str, int len){
43         
44         StringBuffer s = new StringBuffer();
45         s.append(str);
46         while(s.length()<len){
47             s.insert(0, 0);
48         }
49         
50         return s.toString();
51     }
52     
53     
54     private String getTimeStamp(){//获取时间戳
55         this.sdf = new SimpleDateFormat("yyyyMMddHHmmssSSS");
56         return this.sdf.format(new Date());
57     }
58     
59     public String getDate(){
60         this.sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
61         return this.sdf.format(new Date());
62     }
63 }
posted on 2012-09-24 20:10 elleniou 阅读(...) 评论(...) 编辑 收藏