优化全局邮箱账户初始化逻辑

hutool-extra/src/main/java/cn/hutool/extra/mail/GlobalMailAccount.java

@@ -3,7 +3,7 @@ package cn.hutool.extra.mail;
 import cn.hutool.core.io.IORuntimeException;
 
 /**
- * 全局邮件帐户，依赖于邮件配置文件{@link MailAccount#MAIL_SETTING_PATH}或{@link MailAccount#MAIL_SETTING_PATH2}
+ * 全局邮件帐户，依赖于邮件配置文件{@link MailAccount#MAIL_SETTING_PATHS}
  * 
  * @author looly
  *
@@ -35,31 +35,13 @@ public enum GlobalMailAccount {
 	 * @return MailAccount
 	 */
 	private MailAccount createDefaultAccount() {
-		MailAccount mailAccount = null;
-		try {
-			mailAccount = new MailAccount(MailAccount.MAIL_SETTING_PATH);
-		} catch (IORuntimeException e) {
-			//ignore
-		}
-		
-		// 寻找config/mailAccount.setting
-		if(null == mailAccount) {
-			try {
-				mailAccount = new MailAccount(MailAccount.MAIL_SETTING_PATH2);
-			} catch (IORuntimeException e) {
-				//ignore
-			}
-		}
-		
-		// 寻找mail.setting
-		if(null == mailAccount) {
+		for (String mailSettingPath : MailAccount.MAIL_SETTING_PATHS) {
 			try {
-				mailAccount = new MailAccount(MailAccount.MAIL_SETTING_PATH3);
+				return new MailAccount(mailSettingPath);
 			} catch (IORuntimeException e) {
 				//ignore
 			}
 		}
-		
-		return mailAccount;
+		return null;
 	}
 }