截取字符串替换成星号

public class TestDemo8 {

    final static String STARS = "*******************************";

    public static void main(String[] args) {

        String s = "(ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.1.217)(PORT = 1521))";
          int beginIndex = s.indexOf("H");
          int endIndex = s.lastIndexOf("7");
          String news = s.substring(beginIndex, endIndex+1);
          
          System.out.println("s..." + s);
          System.out.println("beginIndex..." + beginIndex);
          System.out.println("endIndex..." + endIndex);
          System.out.println("news..." + news);
         
        System.out.println("getEmail..."+getEmail("liudehua@126.com"));    
    }
    
    public static String getEmail(String email){
        if(email == null)
            ;// error
        String[] emailParts = email.split("@");
        if(emailParts.length != 2)
            ;// 格式错误
        int len = emailParts[0].length();
        String char1 = emailParts[0].substring(0, 1);
        String char2 = emailParts[0].substring(len-1, len);
     // String char3 = STARS.substring(0, len - 2);  // 截取中间字符串位数
        String char3 = "***";
        
        System.out.println("1..." + emailParts[0]);  // liudehua
        System.out.println("2..." + emailParts[1]);  // 126.com
        System.out.println("char1..." + char1);  // l
        System.out.println("char2..." + char2);  // a
        
        return char1+char3+char2+"@"+emailParts[1];
    }

}


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