java sendmail 附件_java 发送邮件带附件生成.bin文件解决方案
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;
import java.io.File;
import java.nio.charset.StandardCharsets;
import java.util.Objects;
public class EmailSendBox {
private Logger logger = LoggerFactory.getLogger(this.getClass());
private JavaMailSenderImpl javaMailSender;
public EmailSendBox(JavaMailSenderImpl javaMailSender) {
this.javaMailSender = javaMailSender;
}
//后加的防止题目过长并且进行全局定义
static {
System.setProperty("mail.mime.splitlongparameters","false");
System.setProperty("mail.mime.charset","UTF-8");
}
/**
* @see #send
*/
public String SendHtml(String subject, String sendText, String receivers, String ccReceivers) {
return send(subject, sendText, true, receivers, ccReceivers, null);
}
/**
* @see #send
*/
public String SendHtml(String subject, String sendText, String receivers, String ccReceivers,
File[] attaches) {
return send(subject, sendText, true, receivers, ccReceivers, attaches);
}
/**
* @param subject 主题
* @param sendText 邮件正文
* @param isHtmlContent 是否html的正文
* @param receivers 收件人，只接收一个
* @param ccReceivers 抄送人，多个以comma(半角逗号,)分割，可以为null
* @param attaches 附件，可以为null
* @return success 代表成功；error 代表失败
*/
public String send(String subject, String sendText, boolean isHtmlContent, String receivers, String ccReceivers,
File[] attaches) {
try {
final MimeMessage message = javaMailSender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(message, true, StandardCharsets.UTF_8.name());
// 发件人
helper.setFrom(Objects.requireNonNull(javaMailSender.getUsername()));
// 收件人
helper.setTo(receivers.split(","));
// 抄送人
if(StringUtils.isNotBlank(ccReceivers)) {
helper.setCc(ccReceivers.split(","));
}
// 邮件主题
helper.setSubject(subject);
// 向multipart对象中添加邮件的各个部分内容，包括文本内容和附件
// 添加邮件正文
helper.setText(sendText, isHtmlContent);
// 附件
if (attaches != null) {
for (File attach : attaches) {
if (attach != null) {
// helper.addAttachment(attach.getName(), new FileSystemResource(attach));//最开始写的这种没加encode的涉及到中文名的就容易出错
helper.addAttachment(MimeUtility.encodeWord(attach.getName()), new FileSystemResource(attach));
}
}
}
javaMailSender.send(message);
return "success";
} catch (Exception e) {
logger.error("mail {} send error", subject, e);
return "error";
}
}
}
网上有很多让加MimeUtility.encodeWord,和 System.setProperty("mail.mime.splitlongparameters","false");的，对于一些人的可能好用，但是我这里就不好用了，可能是未进行全局定义的缘故，所以在该方法中加入static方法块包裹它。可以解决附件由于名字过长且含有中文的造成形成.bin文件。