截取字符串替换成星号

 1 public class TestDemo8 {
 2 
 3     final static String STARS = "*******************************";
 4 
 5     public static void main(String[] args) {
 6 
 7         String s = "(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.217)(PORT = 1521))";
 8           int beginIndex = s.indexOf("H");
 9           int endIndex = s.lastIndexOf("7");
10           String news = s.substring(beginIndex, endIndex+1);
11           
12           System.out.println("s..." + s);
13           System.out.println("beginIndex..." + beginIndex);
14           System.out.println("endIndex..." + endIndex);
15           System.out.println("news..." + news);
16          
18         System.out.println("getEmail..."+getEmail("liudehua@126.com"));    
20     }
21     
22     public static String getEmail(String email){
23         if(email == null)
24             ;// error
25         String[] emailParts = email.split("@");
26         if(emailParts.length != 2)
27             ;// 格式错误
28         int len = emailParts[0].length();
29         String char1 = emailParts[0].substring(0, 1);
30         String char2 = emailParts[0].substring(len-1, len);
31      // String char3 = STARS.substring(0, len - 2);  // 截取中间字符串位数
32         String char3 = "***";
33         
34         System.out.println("1..." + emailParts[0]);  // liudehua
35         System.out.println("2..." + emailParts[1]);  // 126.com
36         System.out.println("char1..." + char1);  // l
37         System.out.println("char2..." + char2);  // a
38         
39         return char1+char3+char2+"@"+emailParts[1];
40     }
41 
42 }


输出结果如下：

s...(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.217)(PORT = 1521))
beginIndex...28
endIndex...47
news...HOST = 192.168.1.217
1...liudehua
2...126.com
char1...l
char2...a
getEmail...l***a@126.com

Java中常用的字符串的截取经验

http://jingyan.baidu.com/article/a17d5285224c918098c8f215.html