我成功地使用“JAVAMail”读取了 gmail-email 的内容,并且我能够将它存储在一个字符串中。现在我想从内容(字符串)中获取特定的注册 URL。我该怎么做,该字符串包含大量标签和 href,但我只想提取在下面提到的语句中存在的单词“单击此处”的超链接中提供的 URL
"Please <a class="h5" href="https://newstaging.mobilous.com/en/user-register/******" target="_blank">click here</a> to complete your registration".
在超链接“点击这里”的 url 上
href="https://newstaging.mobilous.com/en/user-register/******"target="_blank"
我已经用下面的代码试过了
package email;
import java.util.ArrayList;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Store;
public class emailAccess {
public static void check(String host, String storeType, String user,
String password)
{
try {
//create properties field
Properties properties = new Properties();
properties.put("mail.imap.host",host);
properties.put("mail.imap.port", "993");
properties.put("mail.imap.starttls.enable", "true");
properties.setProperty("mail.imap.socketFactory.class","javax.net.ssl.SSLSocketFactory");
properties.setProperty("mail.imap.socketFactory.fallback", "false");
properties.setProperty("mail.imap.socketFactory.port",String.valueOf(993));
Session emailSession = Session.getDefaultInstance(properties);
//create the POP3 store object and connect with the pop server
Store store = emailSession.getStore("imap");
store.connect(host, user, password);
//create the folder object and open it
Folder emailFolder = store.getFolder("INBOX");
emailFolder.open(Folder.READ_ONLY);
// retrieve the messages from the folder in an array and print it
Message[] messages = emailFolder.getMessages();
System.out.println("messages.length---" + messages.length);
int n=messages.length;
for (int i = 0; i<n; i++) {
Message message = messages[i];
ArrayList<String> links = new ArrayList<String>();
if(message.getSubject().contains("Thank you for signing up for AppExe")){
String desc=message.getContent().toString();
// System.out.println(desc);
Pattern linkPattern = Pattern.compile(" <a\\b[^>]*href=\"[^>]*>(.*?)</a>", Pattern.CASE_INSENSITIVE|Pattern.DOTALL);
Matcher pageMatcher = linkPattern.matcher(desc);
while(pageMatcher.find()){
links.add(pageMatcher.group());
}
}else{
System.out.println("Email:"+ i + " is not a wanted email");
}
for(String temp:links){
if(temp.contains("user-register")){
System.out.println(temp);
}
}
/*System.out.println("---------------------------------");
System.out.println("Email Number " + (i + 1));
System.out.println("Subject: " + message.getSubject());
System.out.println("From: " + message.getFrom()[0]);
System.out.println("Text: " + message.getContent().toString());*/
}
//close the store and folder objects
emailFolder.close(false);
store.close();
} catch (NoSuchProviderException e) {
e.printStackTrace();
} catch (MessagingException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
String host = "imap.gmail.com";
String mailStoreType = "imap";
String username = "rameshakur@gmail.com";
String password = "*****";
check(host, mailStoreType, username, password);
}
}
在执行时我得到了输出
我怎样才能只提取 href 值,即 https://newstaging.mobilous.com/en/user-register/ ******
求推荐,谢谢
最佳答案
你很接近。您正在使用 group(),但遇到了一些问题。这里有一些应该可以工作的代码,只替换了您已有的一些代码:
Pattern linkPattern = Pattern.compile(" <a\\b[^>]*href=\"([^\"]*)[^>]*>(.*?)</a>", Pattern.CASE_INSENSITIVE|Pattern.DOTALL);
Matcher pageMatcher = linkPattern.matcher(desc);
while(pageMatcher.find()){
links.add(pageMatcher.group(1));
}
我所做的只是更改您的模式,使其显式查找 href 属性的结束引号,然后将模式中您要查找的字符串部分括在括号中。
我还向 pageMather.group()
方法添加了一个参数,因为它需要一个参数。
说实话,您可能只使用这种模式(连同 .group(1)
更改):
Pattern linkPattern = Pattern.compile("href=\"([^\"]*)", Pattern.CASE_INSENSITIVE|Pattern.DOTALL);
关于java - 如何从邮件内容中提取 "registration"URL,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36707939/