您应该使用日志记录工具来记录文件系统中的每个异常，以便管理员希望他们可以通过文件系统查看它。
ErrorUtil
public class ErrorLogUtil {
public static File createErrorFile(String fileName, String productName,
String regionName) {
File fileErrorLogs = new File("Error Logs");
if (!fileErrorLogs.isDirectory()) {
fileErrorLogs.mkdir();
}
File fileProductName = new File(fileErrorLogs, productName);
if (!fileProductName.isDirectory()) {
fileProductName.mkdir();
}
File fileDate = null;
if (regionName != null && regionName.trim().length() != 0) {
File fileRegionName = new File(fileProductName, regionName);
if (!fileRegionName.isDirectory()) {
fileRegionName.mkdir();
}
fileDate = new File(fileRegionName, new SimpleDateFormat(
"dd-MM-yyyy").format(new Date()));
if (!fileDate.isDirectory()) {
fileDate.mkdir();
}
} else {
fileDate = new File(fileProductName, new SimpleDateFormat(
"dd-MM-yyyy").format(new Date()));
if (!fileDate.isDirectory()) {
fileDate.mkdir();
}
}
File errorFile = new File(fileDate, fileName + "-errors.txt");
try {
if (!errorFile.exists()) {
errorFile.createNewFile();
System.out.println("New Error File created=>"+errorFile.getAbsolutePath());
}
} catch (IOException e) {
e.printStackTrace();
}
return errorFile;
}
public static void writeError(File errorFile, String error) {
try {
FileOutputStream fileOutputStream = new FileOutputStream(errorFile,
true);
DataOutputStream out = new DataOutputStream(fileOutputStream);
BufferedWriter bufferedWriter = new BufferedWriter(
new OutputStreamWriter(out));
bufferedWriter.append((new Date())+" - "+error);
bufferedWriter.newLine();
bufferedWriter.flush();
bufferedWriter.close();
fileOutputStream.flush();
fileOutputStream.close();
out.flush();
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
public static void printStackTrace(File errorFile, String message, Throwable error) {
try {
FileOutputStream fileOutputStream = new FileOutputStream(errorFile,
true);
DataOutputStream out = new DataOutputStream(fileOutputStream);
PrintWriter bufferedWriter = new PrintWriter(
new BufferedWriter(new OutputStreamWriter(out)));
bufferedWriter.println(new Date() + " : "+ message);
error.printStackTrace(bufferedWriter);
bufferedWriter.println();
bufferedWriter.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
发送邮件并不好，因为它可能会填满管理员的邮箱，但如果你真的需要这个，你可以创建一个 MailUtil 并向用户发送电子邮件或将其保存在日志中。
MailUtil
public class MailUtil {
public static void sendEmail(String messageString, String subject, Properties props) {
try {
Session mailSession = null;
final String userName = props.getProperty("mail.from");
final String password = props.getProperty("mail.from.password");
mailSession = Session.getInstance(props, new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(userName, password);
}
});
Transport transport = mailSession.getTransport();
MimeMessage message = new MimeMessage(mailSession);
message.setSubject(subject);
message.setFrom(new InternetAddress(props.getProperty("mail.from")));
String[] to = props.getProperty("mail.to").split(",");
for (String email : to) {
message.addRecipient(Message.RecipientType.TO, new InternetAddress(email));
}
String body = messageString;
message.setContent(body, "text/html");
transport.connect();
transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
transport.close();
} catch (Exception exception) {
exception.printStackTrace();
}
}
public static void sendEmail(String subject, String messageString) {
try {
Session mailSession = null;
Properties props=new Properties();
FileInputStream fileInputStream = new FileInputStream(new File("mail-config.properties"));
props.load(fileInputStream);
fileInputStream.close();
final String fromUsername = props.getProperty("mail.from");
final String fromPassword = props.getProperty("mail.from.password");
mailSession = Session.getInstance(props, new javax.mail.Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(fromUsername, fromPassword);
}
});
Transport transport = mailSession.getTransport();
MimeMessage message = new MimeMessage(mailSession);
message.setSubject(subject);
message.setFrom(new InternetAddress(fromUsername));
String[] to = props.getProperty("mail.to").split(",");
for (String email : to) {
message.addRecipient(Message.RecipientType.TO, new InternetAddress(email));
}
String body = messageString;
message.setContent(body, "text/html");
transport.connect();
transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
transport.close();
} catch (Exception exception) {
exception.printStackTrace();
}
}
}
您应该使用属性来管理是否需要邮件，以便将来您可以通过更改属性文件来停止邮件。