大家看看什么原因import java.util.Properties;import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.Multipart;
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;
//发送EMALpublic class SendEmail {
private MimeMessage mimeMsg; //MIME邮件对象 private Session session; //邮件会话对象
private Properties props; //系统属性 private String username; //smtp认证用户名和密码
private String password; private Multipart mp; //Multipart对象,邮件内容,标题,附件等内容均添加到其中后再生成MimeMessage对象
public SendEmail(String smtp){
setSmtpHost(smtp);
createMimeMessage();
} public void setSmtpHost(String hostName) {
System.out.println("设置系统属性:mail.smtp.host = "+ hostName);
if(props == null)props = System.getProperties(); //获得系统属性对象
props.put("mail.smtp.host",hostName); //设置SMTP主机
} public boolean createMimeMessage()
{
try{
System.out.println("准备获取邮件会话对象!");
session = Session.getDefaultInstance(props,null); //获得邮件会话对象
}
catch(Exception e){
System.err.println("获取邮件会话对象时发生错误!"+e);
return false;
} System.out.println("准备创建MIME邮件对象!");
try{
mimeMsg = new MimeMessage(session); //创建MIME邮件对象
mp = new MimeMultipart(); return true;
}
catch(Exception e){
System.err.println("创建MIME邮件对象失败!"+e);
return false;
}
}
public void setNeedAuth(boolean need) {
System.out.println("设置smtp身份认证:mail.smtp.auth = "+need);
if(props == null)props = System.getProperties();
if(need){
props.put("mail.smtp.auth","true");
}else{
props.put("mail.smtp.auth","false");
}
}
public void setNamePass(String name,String pass) {
username = name;
password = pass;
} public boolean setSubject(String mailSubject) {
System.out.println("设置邮件主题!");
try{
mimeMsg.setSubject(mailSubject);
return true;
}
catch(Exception e) {
System.err.println("设置邮件主题发生错误!");
return false;
}
}
public boolean setBody(String mailBody) {
try{
BodyPart bp = new MimeBodyPart();
bp.setContent("<meta http-equiv=Content-Type content=text/html; charset=gb2312>"+mailBody,"text/html;charset=GB2312");
mp.addBodyPart(bp); return true;
}
catch(Exception e){
System.err.println("设置邮件正文时发生错误!"+e);
return false;
}
}
public boolean addFileAffix(String filename) { System.out.println("增加邮件附件:"+filename); try{
BodyPart bp = new MimeBodyPart();
FileDataSource fileds = new FileDataSource(filename);
bp.setDataHandler(new DataHandler(fileds));
bp.setFileName(fileds.getName()); mp.addBodyPart(bp); return true;
}
catch(Exception e){
System.err.println("增加邮件附件:"+filename+"发生错误!"+e);
return false;
}
} public boolean setFrom(String from) {
System.out.println("设置发信人!");
try{
mimeMsg.setFrom(new InternetAddress(from)); //设置发信人
return true;
}
catch(Exception e)
{ return false; }
} public boolean setTo(String to){
if(to == null)return false; try{
mimeMsg.setRecipients(Message.RecipientType.TO,InternetAddress.parse(to));
return true;
}
catch(Exception e){
return false;
} } public boolean setCopyTo(String copyto)
{
if(copyto == null)return false;
try{
mimeMsg.setRecipients(Message.RecipientType.CC,(Address[])InternetAddress.parse(copyto));
return true;
}
catch(Exception e)
{ return false; }
} public boolean sendout()
{
try{
mimeMsg.setContent(mp);
mimeMsg.saveChanges();
System.out.println("正在发送邮件...."); Session mailSession = Session.getInstance(props,null);
Transport transport = mailSession.getTransport("smtp");
transport.connect((String)props.get("mail.smtp.host"),username,password);
System.out.println("发送邮件的smtp服务器为:" + (String)props.get("mail.smtp.host"));
transport.sendMessage(mimeMsg,mimeMsg.getRecipients(Message.RecipientType.TO));
//transport.send(mimeMsg); System.out.println("发送邮件成功!");
transport.close(); return true;
}
catch(Exception e)
{
System.err.println("邮件发送失败!"+e);
return false;
}
}
}
import javax.activation.FileDataSource;
import javax.mail.Address;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.Multipart;
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;
//发送EMALpublic class SendEmail {
private MimeMessage mimeMsg; //MIME邮件对象 private Session session; //邮件会话对象
private Properties props; //系统属性 private String username; //smtp认证用户名和密码
private String password; private Multipart mp; //Multipart对象,邮件内容,标题,附件等内容均添加到其中后再生成MimeMessage对象
public SendEmail(String smtp){
setSmtpHost(smtp);
createMimeMessage();
} public void setSmtpHost(String hostName) {
System.out.println("设置系统属性:mail.smtp.host = "+ hostName);
if(props == null)props = System.getProperties(); //获得系统属性对象
props.put("mail.smtp.host",hostName); //设置SMTP主机
} public boolean createMimeMessage()
{
try{
System.out.println("准备获取邮件会话对象!");
session = Session.getDefaultInstance(props,null); //获得邮件会话对象
}
catch(Exception e){
System.err.println("获取邮件会话对象时发生错误!"+e);
return false;
} System.out.println("准备创建MIME邮件对象!");
try{
mimeMsg = new MimeMessage(session); //创建MIME邮件对象
mp = new MimeMultipart(); return true;
}
catch(Exception e){
System.err.println("创建MIME邮件对象失败!"+e);
return false;
}
}
public void setNeedAuth(boolean need) {
System.out.println("设置smtp身份认证:mail.smtp.auth = "+need);
if(props == null)props = System.getProperties();
if(need){
props.put("mail.smtp.auth","true");
}else{
props.put("mail.smtp.auth","false");
}
}
public void setNamePass(String name,String pass) {
username = name;
password = pass;
} public boolean setSubject(String mailSubject) {
System.out.println("设置邮件主题!");
try{
mimeMsg.setSubject(mailSubject);
return true;
}
catch(Exception e) {
System.err.println("设置邮件主题发生错误!");
return false;
}
}
public boolean setBody(String mailBody) {
try{
BodyPart bp = new MimeBodyPart();
bp.setContent("<meta http-equiv=Content-Type content=text/html; charset=gb2312>"+mailBody,"text/html;charset=GB2312");
mp.addBodyPart(bp); return true;
}
catch(Exception e){
System.err.println("设置邮件正文时发生错误!"+e);
return false;
}
}
public boolean addFileAffix(String filename) { System.out.println("增加邮件附件:"+filename); try{
BodyPart bp = new MimeBodyPart();
FileDataSource fileds = new FileDataSource(filename);
bp.setDataHandler(new DataHandler(fileds));
bp.setFileName(fileds.getName()); mp.addBodyPart(bp); return true;
}
catch(Exception e){
System.err.println("增加邮件附件:"+filename+"发生错误!"+e);
return false;
}
} public boolean setFrom(String from) {
System.out.println("设置发信人!");
try{
mimeMsg.setFrom(new InternetAddress(from)); //设置发信人
return true;
}
catch(Exception e)
{ return false; }
} public boolean setTo(String to){
if(to == null)return false; try{
mimeMsg.setRecipients(Message.RecipientType.TO,InternetAddress.parse(to));
return true;
}
catch(Exception e){
return false;
} } public boolean setCopyTo(String copyto)
{
if(copyto == null)return false;
try{
mimeMsg.setRecipients(Message.RecipientType.CC,(Address[])InternetAddress.parse(copyto));
return true;
}
catch(Exception e)
{ return false; }
} public boolean sendout()
{
try{
mimeMsg.setContent(mp);
mimeMsg.saveChanges();
System.out.println("正在发送邮件...."); Session mailSession = Session.getInstance(props,null);
Transport transport = mailSession.getTransport("smtp");
transport.connect((String)props.get("mail.smtp.host"),username,password);
System.out.println("发送邮件的smtp服务器为:" + (String)props.get("mail.smtp.host"));
transport.sendMessage(mimeMsg,mimeMsg.getRecipients(Message.RecipientType.TO));
//transport.send(mimeMsg); System.out.println("发送邮件成功!");
transport.close(); return true;
}
catch(Exception e)
{
System.err.println("邮件发送失败!"+e);
return false;
}
}
}
在这一句后面加一句:session.setDebug(true);
根据控制台输出找找原因。