用Javamail写的邮件采取程序[Java编程]
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前段时间一向忙于学校里面的事情,没有时间静下心来写接纳邮件的程序,目前学校里的事情终于忙完了,可以静下心里做自己喜好做的事情了,这种感受真的很好!
对我自己而言,刚开始在用JavaMail来编写收邮件的程序时最重要和最难的要数解析附件和邮件正文的部份,因为Mime范例实在是太多了!下面的这段代码是我自己学习JavaMail的一段领会,供大家来参考(请高手指教,有什么更好的办法,请答复此文章),具体代码以下:
package coffeecatwebmail;
import java.io.*;
import java.text.*;
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
public class PraseMimeMessage{
private MimeMessage mimeMessage = null;
private String saveAttachPath = ""; //附件下载后的存放目录
private StringBuffer bodytext = new StringBuffer();
//存放邮件内容的StringBuffer对象
private String dateformat = "yy-MM-dd HH:mm"; //默许的日前显示格局
/**
* 构造函数,初始化一个MimeMessage对象
*/
public PraseMimeMessage(){}
public PraseMimeMessage(MimeMessage mimeMessage){
this.mimeMessage = mimeMessage;
System.out.println("create a PraseMimeMessage object........");
}
public void setMimeMessage(MimeMessage mimeMessage){
this.mimeMessage = mimeMessage;
}
/**
* 得到发件人的地址和姓名
*/
public String getFrom()throws Exception{
InternetAddress address[] = (InternetAddress[])mimeMessage.getFrom();
String from = address[0].getAddress();
if(from == null) from="";
String personal = address[0].getPersonal();
if(personal == null) personal="";
String fromaddr = personal+"<"+from+">";
return fromaddr;
}
/**
* 得到邮件的收件人,抄送,和密送的地址和姓名,按照所传送的参数的差别
* "to"----收件人 "cc"---抄送人地址 "bcc"---密送人地址
*/
public String getMailAddress(String type)throws Exception{
String mailaddr = "";
String addtype = type.toUpperCase();
InternetAddress []address = null;
if(addtype.equals("TO") || addtype.equals("CC") ||addtype.equals("BCC")){
if(addtype.equals("TO")){
address = (InternetAddress[])mimeMessage.getRecipients(Message.RecipientType.TO);
}else if(addtype.equals("CC")){
address = (InternetAddress[])mimeMessage.getRecipients(Message.RecipientType.CC);
}else{
address = (InternetAddress[])mimeMessage.getRecipients(Message.RecipientType.BCC);
}
if(address != null){
for(int i=0;i<address.length;i++){
String email=address[i].getAddress();
if(email==null) email="";
else{
email=MimeUtility.decodeText(email);
}
String personal=address[i].getPersonal();
if(personal==null) personal="";
else{
personal=MimeUtility.decodeText(personal);
}
String compositeto=personal+"<"+email+">";
mailaddr+=","+compositeto;
}
mailaddr=mailaddr.substring(1);
}
}else{
throw new Exception("Error emailaddr type!");
}
return mailaddr;
}
/**
* 得到邮件主题
*/
public String getSubject()throws MessagingException{
String subject = "";
try{
subject = MimeUtility.decodeText(mimeMessage.getSubject());
if(subject == null) subject="";
}catch(Exception exce){
}
return subject;
}
/**
* 得到邮件发送日期
*/
public String getSentDate()throws Exception{
Date sentdate = mimeMessage.getSentDate();
SimpleDateFormat format = new SimpleDateFormat(dateformat);
return format.format(sentdate);
}
/**
* 得到邮件正文内容
*/
public String getBodyText(){
return bodytext.toString();
}
/**
* 解析邮件,把得到的邮件内容保存到一个StringBuffer对象中,解析邮件
* 主如果按照MimeType范例的差别履行差别的操作,一步一步的解析
*/
public void getMailContent(Part part)throws Exception{
String contenttype = part.getContentType();
int nameindex = contenttype.indexOf("name");
boolean conname =false;
if(nameindex != -1) conname=true;
System.out.println("CONTENTTYPE: "+contenttype);
if(part.isMimeType("text/plain") && !conname){
bodytext.append((String)part.getContent());
}else if(part.isMimeType("text/html") && !conname){
bodytext.append((String)part.getContent());
}else if(part.isMimeType("multipart/*")){
Multipart multipart = (Multipart)part.getContent();
int counts = multipart.getCount();
for(int i=0;i<counts;i++){
getMailContent(multipart.getBodyPart(i));
}
}else if(part.isMimeType("message/rfc822")){
getMailContent((Part)part.getContent());
}else{}
}
/**
* 判断此邮件能否需求回执,假如需求回执返回"true",不然返回"false"
*/
public boolean getReplySign()throws MessagingException{
boolean replysign = false;
String needreply[] = mimeMessage.getHeader("Disposition-Notification-To");
if(needreply != null){
replysign = true;
}
return replysign;
}
/**
* 得到此邮件的Message-ID
*/
public String getMessageId()throws MessagingException{
return mimeMessage.getMessageID();
}
/**
* 【判断此邮件能否已读,假如未读返回返回false,反之返回true】
*/
public boolean isNew()throws MessagingException{
boolean isnew = false;
Flags flags = ((Message)mimeMessage).getFlags();
Flags.Flag []flag = flags.getSystemFlags();
System.out.println("flags's length: "+flag.length);
for(int i=0;i<flag.length;i++){
if(flag[i] == Flags.Flag.SEEN){
isnew=true;
System.out.println("seen Message.......");
break;
}
}
return isnew;
}
/**
* 判断此邮件能否包含附件
*/
public boolean isContainAttach(Part part)throws Exception{
boolean attachflag = false;
String contentType = part.getContentType();
if(part.isMimeType("multipart/*")){
Multipart mp = (Multipart)part.getContent();
for(int i=0;i<mp.getCount();i++){
BodyPart mpart = mp.getBodyPart(i);
String disposition = mpart.getDisposition();
if((disposition != null) &&((disposition.equals(Part.ATTACHMENT)) ||(disposition.equals(Part.INLINE))))
attachflag = true;
else if(mpart.isMimeType("multipart/*")){
attachflag = isContainAttach((Part)mpart);
}else{
String contype = mpart.getContentType();
if(contype.toLowerCase().indexOf("application") != -1) attachflag=true;
if(contype.toLowerCase().indexOf("name") != -1) attachflag=true;
}
}
}else if(part.isMimeType("message/rfc822")){
attachflag = isContainAttach((Part)part.getContent());
}
return attachflag;
}
/**
* 【保存附件】
*/
public void saveAttachMent(Part part)throws Exception{
String fileName = "";
if(part.isMimeType("multipart/*")){
Multipart mp = (Multipart)part.getContent();
for(int i=0;i<mp.getCount();i++){
BodyPart mpart = mp.getBodyPart(i);
String disposition = mpart.getDisposition();
if((disposition != null) &&((disposition.equals(Part.ATTACHMENT)) ||(disposition.equals(Part.INLINE)))){
fileName = mpart.getFileName();
if(fileName.toLowerCase().indexOf("gb2312") != -1){
fileName = MimeUtility.decodeText(fileName);
}
saveFile(fileName,mpart.getInputStream());
}else if(mpart.isMimeType("multipart/*")){
saveAttachMent(mpart);
}else{
fileName = mpart.getFileName();
if((fileName != null) && (fileName.toLowerCase().indexOf("GB2312") != -1)){
fileName=MimeUtility.decodeText(fileName);
saveFile(fileName,mpart.getInputStream());
}
}
}
}else if(part.isMimeType("message/rfc822")){
saveAttachMent((Part)part.getContent());
}
}
/**
* 【设置附件存放途径】
*/
public void setAttachPath(String attachpath){
this.saveAttachPath = attachpath;
}
/**
* 【设置日期显示格局】
*/
public void setDateFormat(String format)throws Exception{
this.dateformat = format;
}
/**
* 【得到附件存放途径】
*/
public String getAttachPath(){
return saveAttachPath;
}
/**
* 【真正的保存附件到指定目录里】
*/
private void saveFile(String fileName,InputStream in)throws Exception{
String osName = System.getProperty("os.name");
String storedir = getAttachPath();
String separator = "";
if(osName == null) osName="";
if(osName.toLowerCase().indexOf("win") != -1){
separator = "\"
if(storedir == null || storedir.equals("")) storedir="c:\tmp";
}else{
separator = "/";
storedir = "/tmp";
}
File storefile = new File(storedir+separator+fileName);
System.out.println("storefile's path: "+storefile.toString());
//for(int i=0;storefile.exists();i++){
//storefile = new File(storedir+separator+fileName+i);
/
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