我做了一个自动发邮件,发出的主题全是null,怎样解决? 就是我做了一个自动发送邮件到指定服务器的程序,然后发送的标题是另外3个类的输出结果,但是发出的邮件标题全是null,问题出在哪了,求教 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 import java.io.File;import java.util.Date;import java.util.Properties;import java.util.Vector;import javax.activation.DataHandler;import javax.activation.FileDataSource;import javax.mail.Authenticator;import javax.mail.Multipart;import javax.mail.PasswordAuthentication;import javax.mail.Session;import javax.mail.Transport;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeBodyPart;import javax.mail.internet.MimeMessage;import javax.mail.internet.MimeMultipart;import javax.mail.internet.MimeUtility;public class SendMailTest { public int sendMail(String host, String from, String username, String password, String to, String subject, String content, Vector appendFiles, boolean author) { try { Properties p = System.getProperties(); p.put("mail.smtp.host", host); p.put("mail.smtp.auth", author + ""); p.put("mail.smtp.localhost", "forceview"); Session session = Session.getDefaultInstance(p, new PopupAuthenticator(username, password)); MimeMessage msg = new MimeMessage(session); msg.setFrom(new InternetAddress(from));// 设置发送帐号 String[] tos = to.split(";"); InternetAddress[] sendTo = new InternetAddress[tos.length]; for (int i = 0; i < tos.length; i++) { sendTo[i] = new InternetAddress(tos[i]); } msg.setRecipients(javax.mail.internet.MimeMessage.RecipientType.TO, sendTo);// 设置接收邮件的地址 msg.setSubject(subject, "utf-8");// 设置主题 msg.setSentDate(new Date());// 设置发送时间 Multipart mp = new MimeMultipart(); MimeBodyPart bp = new MimeBodyPart(); bp.setContent( "<meta http-equiv=Content-Type content=text/html; charset=utf-8>" + content, "text/html;charset=UTF-8"); mp.addBodyPart(bp); MimeBodyPart fp; String appendStrs = ""; if (appendFiles != null) { for (int i = 0; i < appendFiles.size(); i++) { fp = new MimeBodyPart(); appendStrs = appendFiles.get(i).toString(); String[] filenames = appendStrs.split("\\|"); if (new File(filenames[0]).exists()) { FileDataSource fds = new FileDataSource(filenames[0]); fp.setDataHandler(new DataHandler(fds)); fp.setFileName(MimeUtility.encodeText(filenames[1] + fds.getName(), "utf-8", "K")); mp.addBodyPart(fp); } } } msg.setContent(mp); msg.saveChanges(); Transport transport = session.getTransport("smtp");// 设置发送端口 transport.connect(host, username, password);// 连接邮件服务器 transport.sendMessage(msg, msg.getAllRecipients()); transport.close(); } catch (Exception e) { e.printStackTrace(); return -1; } return 0; } class PopupAuthenticator extends Authenticator { private String username, password; public PopupAuthenticator(String username, String password) { this.username = username; this.password = password; } public PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(this.username, this.password); } }}我的代码如上,麻烦帮忙看看,弄了很久了,就是不知道问题出在哪? debug,看看你setsubject里面是不是空的 subject 没有赋值,你在调用方法的时候传过来,我在做邮件发送的时候主题都是写死的,因为不需要改变的 subject 你调试看下 肯定是没有赋值才是Null java vaadin [急]如何将目录打成jar包 hibernate查询问题,各位帮忙 struts 显示在线用户 如何改变field级别的错误信息的颜色显示 Spring、Hibernate 使用调查,来者有分啊,分不够再加!!! vml 转换,急急急! 初学者问:tomcat5.5+jdk5 中文乱码问题,内附源码 有关短信协议CMPP3.0问题 我学EJB的疑问 Http 400 Java邮件 懂的人帮忙指点一下! 提交表单问题,
import java.util.Date;
import java.util.Properties;
import java.util.Vector;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;
public class SendMailTest { public int sendMail(String host, String from, String username,
String password, String to, String subject, String content,
Vector appendFiles, boolean author) {
try {
Properties p = System.getProperties(); p.put("mail.smtp.host", host);
p.put("mail.smtp.auth", author + "");
p.put("mail.smtp.localhost", "forceview"); Session session = Session.getDefaultInstance(p,
new PopupAuthenticator(username, password)); MimeMessage msg = new MimeMessage(session); msg.setFrom(new InternetAddress(from));// 设置发送帐号 String[] tos = to.split(";");
InternetAddress[] sendTo = new InternetAddress[tos.length];
for (int i = 0; i < tos.length; i++) {
sendTo[i] = new InternetAddress(tos[i]);
}
msg.setRecipients(javax.mail.internet.MimeMessage.RecipientType.TO,
sendTo);// 设置接收邮件的地址 msg.setSubject(subject, "utf-8");// 设置主题 msg.setSentDate(new Date());// 设置发送时间 Multipart mp = new MimeMultipart(); MimeBodyPart bp = new MimeBodyPart();
bp.setContent(
"<meta http-equiv=Content-Type content=text/html; charset=utf-8>"
+ content, "text/html;charset=UTF-8"); mp.addBodyPart(bp); MimeBodyPart fp;
String appendStrs = "";
if (appendFiles != null) {
for (int i = 0; i < appendFiles.size(); i++) {
fp = new MimeBodyPart();
appendStrs = appendFiles.get(i).toString();
String[] filenames = appendStrs.split("\\|"); if (new File(filenames[0]).exists()) {
FileDataSource fds = new FileDataSource(filenames[0]);
fp.setDataHandler(new DataHandler(fds));
fp.setFileName(MimeUtility.encodeText(filenames[1]
+ fds.getName(), "utf-8", "K"));
mp.addBodyPart(fp);
}
}
}
msg.setContent(mp);
msg.saveChanges(); Transport transport = session.getTransport("smtp");// 设置发送端口
transport.connect(host, username, password);// 连接邮件服务器
transport.sendMessage(msg, msg.getAllRecipients()); transport.close();
} catch (Exception e) {
e.printStackTrace(); return -1;
} return 0;
} class PopupAuthenticator extends Authenticator {
private String username, password; public PopupAuthenticator(String username, String password) {
this.username = username;
this.password = password;
} public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(this.username, this.password);
}
}}
我的代码如上,麻烦帮忙看看,弄了很久了,就是不知道问题出在哪?