我正在 HP-UX 机器上从控制台运行 java 应用程序。在其中，我生成一些报告，压缩它们，然后通过电子邮件发送它们。一切正常，除了电子邮件。
我正在使用邮件二进制文件从命令行发送邮件。由于它是 HP-UX，它与标准的 GNU sendmail 有点不同。
这是我用来发送邮件的代码：
public static void EmailReports(String[] recipients, String reportArchive, String subject){
SimpleDateFormat dateFormat = new SimpleDateFormat("MM-dd-yyyy");
String today = dateFormat.format(new Date());
File tempEmailFile;
BufferedWriter emailWriter;
try {
tempEmailFile = File.createTempFile("report_email_" + today, "msg");
emailWriter = new BufferedWriter(new FileWriter(tempEmailFile));
} catch (IOException e) {
e.printStackTrace();
System.out.println("Failed to send email. Could not create temporary file.");
return;
}
try {
emailWriter.write("SUBJECT: " + subject + "\n");
emailWriter.write("FROM: " + FROM + "\n");
emailWriter.write(BODY + "\n");
emailWriter.close();
} catch (IOException e) {
e.printStackTrace();
System.out.println("Failed to send email. Could not write to temporary file.");
}
//read the archive in
try {
FileInputStream archiveIS = new FileInputStream(new File(reportArchive));
OutputStream archiveEncoder = MimeUtility.encode(new FileOutputStream(tempEmailFile, true), "uuencode", Zipper.getArchiveName(reportArchive));
//read archive
byte[] buffer = new byte[archiveIS.available()]; //these should never be more than a megabyte or two, so storing it in memory is no big deal.
archiveIS.read(buffer);
//encode archive
archiveEncoder.write(buffer);
//close both
archiveIS.close();
archiveEncoder.close();
} catch (FileNotFoundException e) {
System.out.println("Failed to send email. Could not find archive to email.");
e.printStackTrace();
} catch (MessagingException e) {
System.out.println("Failed to send email. Could not encode archive.");
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
System.out.println("Failed to send email. Could not encode archive.");
}
System.out.println("Sending '" + subject + "' email.");
try {
Process p = Runtime.getRuntime().exec("mail me@example.com < " + tempEmailFile.getAbsolutePath());
System.out.println("mail me@example.com < " + tempEmailFile.getAbsolutePath());
StringBuffer buffer = new StringBuffer();
while(p.getErrorStream().available() > 0){
buffer.append((char) p.getErrorStream().read());
}
System.out.println("STDERR: " + buffer.toString());
buffer = new StringBuffer();
while(p.getInputStream().available() > 0){
buffer.append((char) p.getInputStream().read());
}
System.out.println("STDOUT: " + buffer.toString());
} catch (IOException e) {
e.printStackTrace();
System.out.println("Failed to send email. Could not get access to the shell.");
}
}
当我运行程序并发送电子邮件时，我收到一封空白电子邮件，没有主题、没有正文、没有附件，它来自 HP-UX 框中的 user@hostname，而不是来自FROM.
但是，当我运行它运行的同一行时（请参阅我调用 exec 后打印出的命令），我会从正确的用户那里收到正确的电子邮件，其中包含主题、正文和附件。
STDOUT 和 STDERR 都是空的。就好像我正在向邮件发送一个空白文件，但是当我在调用 exec 之前打印文件时，它就在那里。
这里发生了什么？
编辑：尝试：
使用 Ksh：
try {
String cmd = "mail me@example.com.com < " + tempEmailFile.getAbsolutePath();
Runtime.getRuntime().exec(new String[] {"/usr/bin/ksh", cmd});
} catch (IOException e) {
e.printStackTrace();
System.out.println("Failed to send email. Could not get access to the shell.");
}
使用标准输入：
try {
System.out.println("mail me@example.com < " + tempEmailFile.getAbsolutePath());
Process p = Runtime.getRuntime().exec("mail me@example.com ");
FileInputStream inFile = new FileInputStream(tempEmailFile);
byte[] byteBuffer = new byte[inFile.available()];
inFile.read(byteBuffer);
p.getOutputStream().write(byteBuffer);
inFile.close();
p.getOutputStream().close();
StringBuffer buffer = new StringBuffer();
while(p.getErrorStream().available() > 0){
buffer.append((char) p.getErrorStream().read());
}
System.out.println("STDERR: " + buffer.toString());
buffer = new StringBuffer();
while(p.getInputStream().available() > 0){
buffer.append((char) p.getInputStream().read());
}
System.out.println("STDOUT: " + buffer.toString());
} catch (IOException e) {
e.printStackTrace();
System.out.println("Failed to send email. Could not get access to the shell.");
}