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JSP中email格式的判断
请问怎样才可以判断email的格式，就是判断有@符号，我用过
if(mail.indexOf('@')<=0)
out.println("email address wrong!");
但是不可以，还有就是咋可以让它限制用户注册时在email栏输入中文，小妹谢谢各位了
if(mail.indexOf('@')<=0)
out.println("email address wrong!");
但是不可以，还有就是咋可以让它限制用户注册时在email栏输入中文，小妹谢谢各位了
...全文
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donny2000 2002-05-16
用正则表达式
HuangBin 2002-05-16
我给你个简单的：
public boolean isEmail(String email){
int pos;
pos=email.indexOf('@');
if (pos==-1)
return false;
else{
pos=email.indexOf('.');
if (pos==-1)
return false;
else
return true;
}
}
public boolean isEmail(String email){
int pos;
pos=email.indexOf('@');
if (pos==-1)
return false;
else{
pos=email.indexOf('.');
if (pos==-1)
return false;
else
return true;
}
}
Andrawu 2002-05-16
此帖里有你想要的判断email的格式的方法。
http://www.csdn.net/expert/topic/654/654432.xml?temp=.3112146
http://www.csdn.net/expert/topic/654/654432.xml?temp=.3112146
Broadsea 2002-05-16
找到了！我自己的EMIAL校验就是参照SUN下面的例子做的。
Email Validation
The following code is a sample of some characters you can check are in an email address, or should not be in an email address. It is not a complete email validation program that checks for all possible email scenarios, but can be added to as needed.
/*
* Checks for invalid characters
* in email addresses
*/
public class EmailValidation {
public static void main(String[] args)
throws Exception {
String input = "@sun.com";
//Checks for email addresses starting with
//inappropriate symbols like dots or @ signs.
Pattern p = Pattern.compile("^\\.|^\\@");
Matcher m = p.matcher(input);
if (m.find())
System.err.println("Email addresses don't start" +
" with dots or @ signs.");
//Checks for email addresses that start with
//www. and prints a message if it does.
p = Pattern.compile("^www\\.");
m = p.matcher(input);
if (m.find()) {
System.out.println("Email addresses don't start" +
" with \"www.\", only web pages do.");
}
p = Pattern.compile("[^A-Za-z0-9\\.\\@_\\-~#]+");
m = p.matcher(input);
StringBuffer sb = new StringBuffer();
boolean result = m.find();
boolean deletedIllegalChars = false;
while(result) {
deletedIllegalChars = true;
m.appendReplacement(sb, "");
result = m.find();
}
// Add the last segment of input to the new String
m.appendTail(sb);
input = sb.toString();
if (deletedIllegalChars) {
System.out.println("It contained incorrect characters" +
" , such as spaces or commas.");
}
}
}
Email Validation
The following code is a sample of some characters you can check are in an email address, or should not be in an email address. It is not a complete email validation program that checks for all possible email scenarios, but can be added to as needed.
/*
* Checks for invalid characters
* in email addresses
*/
public class EmailValidation {
public static void main(String[] args)
throws Exception {
String input = "@sun.com";
//Checks for email addresses starting with
//inappropriate symbols like dots or @ signs.
Pattern p = Pattern.compile("^\\.|^\\@");
Matcher m = p.matcher(input);
if (m.find())
System.err.println("Email addresses don't start" +
" with dots or @ signs.");
//Checks for email addresses that start with
//www. and prints a message if it does.
p = Pattern.compile("^www\\.");
m = p.matcher(input);
if (m.find()) {
System.out.println("Email addresses don't start" +
" with \"www.\", only web pages do.");
}
p = Pattern.compile("[^A-Za-z0-9\\.\\@_\\-~#]+");
m = p.matcher(input);
StringBuffer sb = new StringBuffer();
boolean result = m.find();
boolean deletedIllegalChars = false;
while(result) {
deletedIllegalChars = true;
m.appendReplacement(sb, "");
result = m.find();
}
// Add the last segment of input to the new String
m.appendTail(sb);
input = sb.toString();
if (deletedIllegalChars) {
System.out.println("It contained incorrect characters" +
" , such as spaces or commas.");
}
}
}
Broadsea 2002-05-16
没这么简单，java.sun.com上有标准的例程，如果需要的话，可以帮你找找。
