character encoding issue while reading email using java mail api - jakarta-mail

Question

Hi I am reading emil's from a mailbox using Java mail Api.
For an email ,The from Address has Chinese characters and looks as below
(krishna 国际快 <12139#ty.com> ).
After reading the email , When I get the from Address from message using message.getFromAddress();
The from address is some thing like below
?utf-8?Q?Kris=EF=BC=88=E4=BF=9E=E7=94=9F=EF=BC=89?= <12139#ty.com>
How can I get the original from address.

Answer 1

The email address encoding issue while reading the email from a mail box is fixed.
StringBuffer sbFrom =null;
sbFrom = new StringBuffer();
Address[] in = msg.getFrom();
for (Address address : in) {
System.out.println("FROM: " + address.toString());
sbFrom.append(address.toString());
}
I created two solutions for this . Please find them below.
Solution 1:
Created a regular expression and checking the regular expression , If email address matches the regular expression then we decode the email address.
Please check the code below.
String ENCODED_PART_REGEX_PATTERN="=\\?([^?]+)\\?([^?]+)\\?([^?]+)\\?=";
Pattern pattern=Pattern.compile(ENCODED_PART_REGEX_PATTERN);
Matcher m =pattern.matcher(sbFrom.toString());
if(m.find()){
System.out.println("FROM: " +MimeUtility.decodeWord( sbFrom.toString()));
}else{
System.out.println("FROM: " + sbFrom.toString());
}
Solution 2: Written a method which decodes the given email address. If we get javax.mail.internet.ParseException while decoding then it means the email Address do not have any encoded characters , so we return normal string.
Please observe the below method.
public String decodeAddress(String emailId) throws UnsupportedEncodingException{
String string = "";
try{
string = MimeUtility.decodeWord(emailId);
}catch(ParseException e){
System.out.println("ParseException occured so return the same string");
string =emailId;
}
return string;
}