java发送邮件及邮件附件代码实例

1、packagecom.zlz3907.mail;importjava.io.BufferedReader;importjava.io.File;importjava.io.FileInputStream;importjava.io.FileNotFoundException;importjava.io.IOException;importjava.io.InputStream;importjava.io.InputStreamReader;importjava.io.PrintWriter;importjava.io.UnsupportedEncodingException;.Socket;i

2、mportjava.nio.charset.Charset;importjava.text.SimpleDateFormat;importjava.util.ArrayList;importjava.util.Date;importjava.util.HashMap;importjava.util.List;importjava.util.Map;importsun.misc.BASE64Encoder;/值为true"则在发送邮件linkMail#send()过程中会读取服务器端返回的消息，并在邮件发送完毕后将这些消息返回给用户。*该类使用Socket连接到邮件服务器，*并实现了向

3、指定邮箱发送邮件及附件的功能。*authorZhongLizhi*/publicclassMail(*换行符*/*privatestaticfinalStringLINE_END="rn"值为true”输出高度信息(包括服务器响应信息)，值为“*false”则不输出调试信息。*/*privatebooleanisDebug=true;*/privatebooleanisAllowReadSocketInfo=true;/*邮件服务器地址*/privateStringhost;/*发件人邮箱地址*/privateStringfrom;/*收件人邮箱地址*/privateLis

4、t<String>to;/*抄送地址*/privateList<String>cc;/*暗送地址*/privateList<String>bcc;/*邮件主题*/privateStringsubject;/*用户名*/privateStringuser;/*密码*/privateStringpassword;/*MIME邮件类型*/privateStringcontentType;/*用来绑定多个邮件单元link#partSet的分隔标识，我们可以将邮件的正文及每一个附件都看作是一个邮件单元*/privateStringboundary;/*邮件单元分隔标识

5、符，该属性将用来在邮件中作为分割各个邮件单元的标识*O*/privateStringboundaryNextPart;/*传输邮件所采用的编码*/privateStringcontentTransferEncoding;/*设置邮件正文所用的字符集*/privateStringcharset;/*内容描述*/privateStringcontentDisposition;/*邮件正文*/privateStringcontent;/*发送邮件日期的显示格式*/privateStringsimpleDatePattern;/*附件的默认MIME类型*/*privateStringdefaultAt

6、tachmentContentType;邮件单元的集合，用来存放正文单元和所有的附件单元。* */privateList<MailPart>partSet;/authorZhongLizhi*/privateclassMailPartextendsMail不同类型文件对应的linkMIME类型映射。在添加附件link#addAttachment(String)时，程序会在这个映射中查找对应文件的linkMIME* 类型，如果没有，则使用link#defaultAttachmentContentType所定义的类型。*/privatestaticMap<String,Strin

7、g>contentTypeMap;static/MIMEMediaTypescontentTypeMap=newHashMap<String,String>();contentTypeMap.put("xls”,"application/vnd.ms-excel");contentTypeMap.put("xlsx”,"application/vnd.ms-excel");contentTypeMap.put("xlsm","application/vnd.ms-excel")

8、;contentTypeMap.put("xlsb”,"application/vnd.ms-excel");contentTypeMap.put("doc","application/msword");contentTypeMap.put("dot","application/msword");contentTypeMap.put("docx","application/msword");contentTypeMap.put("doc

9、m","application/msword");* contentTypeMap.put("dotm","application/msword");/*该类用来实例化一个正文单元或附件单元对象，他继承了linkMail,在这里制作这个子类主要是为了区别邮件单元对象和邮件服务对象partSet时，程序会调用，使程序易读一些。这些邮件单元全部会放到中，在发送邮件link#send()link#getAllParts()* 方法将所有的单元合并成一个符合MIME式的字符串。publicMailPart()(/*默认构造函数*/p

10、ublicMail()(defaultAttachmentContentType="application/octet-stream"simpleDatePattern="yyyy-MM-ddHH:mm:ss”;boundary="-=_NextPart_zlz_3907_"+System.currentTimeMillis();boundaryNextPart="-"+boundary;contentTransferEncoding="base64"contentType="multipart

11、/alternative"charset=Charset.defaultCharset().name();partSet=newArrayList<MailPart>();to=newArrayList<String>();cc=newArrayList<String>();* bcc=newArrayList<String>();/*根据指定的完整文件名在link#contentTypeMap中查找其相应的MIME类型，如果没找到，则返回link#defaultAttachmentContentType* paramfileName*

12、 文件名返回文件对应的MIME类型。所指定的默认类型。*return*/privateStringgetPartContentType(StringfileName)(Stringret=null;if(null!=fileName)(intflag=fileName.lastIndexOf(".");if(0<=flag&&flag<fileName.length()-1)(fileName=fileName.substring(flag+1);ret=contentTypeMap.get(fileName);if(null=ret)(ret=

13、defaultAttachmentContentType;returnret;/*将给定字符串转换为base64编码的字符串paramstr需要转码的字符串paramcharset原字符串的编码格式returnbase64编码格式的字符*/privateStringtoBase64(Stringstr,Stringcharset)(if(null!=str)(try(returntoBase64(str.getBytes(charset);catch(UnsupportedEncodingExceptione)(e.printStackTrace();return""/re

14、turntoBase64(str,Charset.defaultCharset().name();*parambs*将指定的字节数组转换为base64格式的字符串需要转码的字节数组*returnbase64编码格式的字符*/privateStringtoBase64(bytebs)(* returnnewBASE64Encoder().encode(bs);/*paramstr*将给定字符串转换为base64编码的字符串/*将所有的邮件单元按照标准的MIME格式要求合并。* *return返回一个所有单元合并后的字符串。*/privateStringgetAllParts()(intpartC

15、ount=partSet.size();StringBuildersbd=newStringBuilder(LINE_END);for(inti=partCount-1;i>=0;i-)(Mailattachment=partSet.get(i);StringattachmentContent=attachment.getContent();if(null!=attachmentContent&&0<attachmentContent.length()(sbd.append(getBoundaryNextPart().append(LINE_END);sbd.app

16、end("Content-Type:");sbd.append(attachment.getContentType();sbd.append(LINE_END);sbd.append("Content-Transfer-Encoding:");sbd.append(attachment.getContentTransferEncoding();sbd.append(LINE_END);if(i!=partCount-1)(sbd.append("Content-Disposition:");sbd.append(attachment.

17、getContentDisposition();sbd.append(LINE_END);sbd.append(LINE_END);sbd.append(attachment.getContent();sbd.append(LINE_END);sbd.append(LINE_END);sbd.append(LINE_END);/sbd.append(boundaryNextPart)./append(LINE_END);partSet.clear();returnsbd.toString();/*添加邮件正文单元*/privatevoidaddContent()(if(null!=conten

18、t)(MailPartpart=newMailPart();part.setContent(toBase64(content);part.setContentType("text/plain;charset=""+charset+""");partSet.add(part);privateStringlistToMailString(List<String>mailAddressList)(StringBuildersbd=newStringBuilder();if(null!=mailAddressList)(intli

19、stSize=mailAddressList.size();for(inti=0;i<listSize;i+)(if(0!=i)(sbd.append("");sbd.append("<").append(mailAddressList.get(i).append(">");returnsbd.toString();privateList<String>getrecipient()(List<String>list=newArrayList<String>();list.addAl

20、l(to);list.addAll(cc);list.addAll(bcc);returnlist;/*添加一个附件单元*paramfilePath文件路径*/publicvoidaddAttachment(StringfilePath)(addAttachment(filePath,null);publicvoidaddTo(StringmailAddress)(this.to.add(mailAddress);publicvoidaddCc(StringmailAddress)(this.cc.add(mailAddress);publicvoidaddBcc(StringmailAddr

21、ess)(this.bcc.add(mailAddress);/* paramfileName文件名paramattachmentStream文件流paramcharset文件编码格式*/publicvoidaddAttachment(StringfileName,InputStreamattachmentStream,Stringcharset)(try(*添加一个附件单元paramfilePath文件路径paramcharset文件编码格式*/publicvoidaddAttachment(StringfilePath,Stringcharset)(if(null!=filePath&am

22、p;&filePath.length()>0)(Filefile=newFile(filePath);try(addAttachment(file.getName(),newFileInputStream(file),charset);catch(FileNotFoundExceptione)(System.out.println("错误：”+e.getMessage();System.exit(1);/*添加一个附件单元bytebs=null;if(null!=attachmentstream)(intbuffSize=1024;bytebuff=newbytebuf

23、fSize;bytetemp;bs=newbyte0;intreadTotal=0;while(-1!=(readTotal=attachmentStream.read(buff)(temp=newbytebs.length;System.arraycopy(bs,0,temp,0,bs.length);bs=newbytetemp.length+readTotal;System.arraycopy(temp,0,bs,0,temp.length);System.arraycopy(buff,0,bs,temp.length,readTotal);if(null!=bs)(MailPartat

24、tachmentPart=newMailPart();charset=null!=charset?charset:Charset.defaultCharset().name();StringcontentType=getPartContentType(fileName)+"name="=?"+charset+"?B?”+toBase64(fileName)"?="”attachmentPart.setCharset(charset);attachmentPart.setContentType(contentType);attachme

25、ntPart.setContentDisposition("attachment;filename="=?+charset+"?B?”+toBase64(fileName)+"?="");attachmentPart.setContent(toBase64(bs);partSet.add(attachmentPart);catch(Exceptione)(e.printStackTrace();finally(if(null!=attachmentStream)(try(attachmentStream.close();attachm

26、entStream=null;catch(IOExceptione)(e.printStackTrace();Runtime.getRuntime().gc();Runtime.getRuntime().runFinalization();发送邮件*return邮件服务器反回的信息*/publicStringsend()/对象申明/当邮件发送完毕后，以下三个对象(Socket、/PrintWriter,/BufferedReader)需要关闭。Socketsocket=null;PrintWriterpw=null;BufferedReaderbr=null;trysocket=newSock

27、et(host,25);pw=newPrintWriter(socket.getOutputStream();br=newBufferedReader(newInputStreamReader(socket.getInputStream();StringBuilderinfoBuilder=newStringBuilder("nServerinfo:nn");/与服务器建立连接pw.write("HELO”.concat(host).concat(LINE_END);/连接到邮件服务if(!readResponse(pw,br,infoBuilder,"

28、220”)returninfoBuilder.toString();pw.write("AUTHLOGIN”.concat(LINE_END);/登录if(!readResponse(pw,br,infoBuilder,"250”)returninfoBuilder.toString();pw.write(toBase64(user).concat(LINE_END);/输入用户名if(!readResponse(pw,br,infoBuilder,”334”)returninfoBuilder.toString();pw.write(toBase64(password).

29、concat(LINE_END);/输入密码if(!readResponse(pw,br,infoBuilder,”334”)returninfoBuilder.toString();pw.write("MAILFROM:<"+from+">"+LINE_END);/发件人邮箱地址if(!readResponse(pw,br,infoBuilder,"235”)returninfoBuilder.toString();List<String>recipientList=getrecipient();/收件邮箱地址for(

30、inti=0;i<recipientList.size();i+)(pw.write("RCPTTO:<"+recipientList.get(i)+">"+LINE_END);if(!readResponse(pw,br,infoBuilder,"250")returninfoBuilder.toString();/System.out.println(/getAllSendAddress();pw.write("DATA"+LINE_END);/开始输入邮件if(!readResponse(p

31、w,br,infoBuilder,"250")returninfoBuilder.toString();flush(pw);/设置邮件头信息StringBuffersbf=newStringBuffer("From:<"+from+">"+LINE_END);/发件人sbf.append("To:"+listToMailString(to)+LINE_END);/收件人sbf.append("Cc:"+listToMailString(cc)+LINE_END);/收件人sbf.ap

32、pend("Bcc:"+listToMailString(bcc)+LINE_END);/收件人sbf.append("Subject:"+subject+LINE_END);/邮件主题SimpleDateFormatsdf=newSimpleDateFormat(simpleDatePattern);sbf.append("Date:").append(sdf.format(newDate();sbf.append(LINE_END);/发送时间sbf.append("Content-Type:");sbf.ap

33、pend(contentType);sbf.append("");sbf.append("boundary="");sbf.append(boundary).append(""");/邮件类型设置sbf.append(LINE_END);sbf.append("Thisisamulti-partmessageinMIMEformat.");sbf.append(LINE_END);/添加邮件正文单元addContent();/合并所有单元，正文和附件。sbf.append(getAllParts

34、();/发送sbf.append(LINE_END).append(".”).append(LINE_END);pw.write(sbf.toString();readResponse(pw,br,infoBuilder,"354”);flush(pw);/QUIT退出pw.write("QUIT"+LINE_END);if(!readResponse(pw,br,infoBuilder,"250")returninfoBuilder.toString();flush(pw);returninfoBuilder.toString();

35、catch(Exceptione)(e.printStackTrace();return"Exception:"+e.getMessage();finally(/释放资源try(if(null!=socket)socket.close();if(null!=pw)pw.close();if(null!=br)br.close();catch(IOExceptione)(e.printStackTrace();/this.to.clear();/this.cc.clear();/this.bcc.clear();this.partSet.clear();/parampw* 邮

36、件服务器输入流将SMT肺令发送到邮件服务器*/privatevoidflush(PrintWriterpw)(if(!isAllowReadSocketInfo)(pw.flush();/*读取邮件服务器的响应信息parampw邮件服务器输入流parambr邮件服务器输出流paraminfoBuilder用来存放服务器响应信息的字符串缓冲parammsgCodereturnthrowsIOException*/privatebooleanreadResponse(PrintWriterpw,BufferedReaderbr,StringBuilderinfoBuilder,StringmsgC

37、ode)throwsIOException(if(isAllowReadSocketInfo)(pw.flush();Stringmessage=br.readLine();infoBuilder.append("SERVER:/>”);infoBuilder.append(message).append(LINE_END);if(null=message|0>message.indexOf(msgCode)(System.out.println("ERROR:"+message);pw.write("QUIT”.concat(LINE_EN

38、D);pw.flush();returnfalse;if(isDebug)(System.out.println("DEBUG:/>"+msgCode+"/"+message);returntrue;publicStringgetBoundaryNextPart()(returnboundaryNextPart;publicvoidsetBoundaryNextPart(StringboundaryNextPart)(this.boundaryNextPart=boundaryNextPart;publicStringgetDefaultAttac

39、hmentContentType()(returndefaultAttachmentContentType;publicvoidsetDefaultAttachmentContentType(StringdefaultAttachmentContentType)(this.defaultAttachmentContentType=defaultAttachmentContentType;publicStringgetHost()(returnhost;publicvoidsetHost(Stringhost)(this.host=host;publicStringgetFrom()(retur

40、nfrom;publicvoidsetFrom(Stringfrom)(this.from=from;publicList<String>getTo()(returnto;publicvoidsetTo(List<String>to)(this.to=to;publicStringgetSubject()(returnsubject;publicvoidsetSubject(Stringsubject)(this.subject=subject;publicStringgetUser()(returnuser;publicvoidsetUser(Stringuser)(

41、this.user=user;publicStringgetPassword()(returnpassword;publicvoidsetPassword(Stringpassword)(this.password=password;publicStringgetContentType()(returncontentType;publicvoidsetContentType(StringcontentType)(this.contentType=contentType;publicStringgetBoundary()(returnboundary;publicvoidsetBoundary(

42、Stringboundary)(this.boundary=boundary;publicStringgetContentTransferEncoding()(returncontentTransferEncoding;publicvoidsetContentTransferEncoding(StringcontentTransferEncoding)(this.contentTransferEncoding=contentTransferEncoding;publicStringgetCharset()(returncharset;publicvoidsetCharset(Stringcha

43、rset)(this.charset=charset;publicStringgetContentDisposition()(returncontentDisposition;publicvoidsetContentDisposition(StringcontentDisposition)(this.contentDisposition=contentDisposition;publicStringgetSimpleDatePattern()returnsimpleDatePattern;publicvoidsetSimpleDatePattern(StringsimpleDatePatter

44、n)this.simpleDatePattern=simpleDatePattern;publicStringgetContent()returncontent;publicvoidsetContent(Stringcontent)this.content=content;publicbooleanisAllowReadSocketInfo()returnisAllowReadSocketInfo;publicvoidsetAllowReadSocketInfo(booleanisAllowReadSocketInfo)this.isAllowReadSocketInfo=isAllowRea

45、dSocketInfo;/*paramargs*/publicstaticvoidmain(Stringargs)/应用示例：线程化发送邮件newThread()Overridepublicvoidrun()(System.out.println("SENDER-"+this.getId()+":/>”+"开始发送邮件.")；/创建邮件对象Mailmail=newMail();mail.setHost("");/邮件服务器地址mail.setFrom("sender");/发件人邮箱mail.add

46、To("recipient");/收件人邮箱mail.addCc("test”);mail.addBcc("test”);mail.setSubject("CCTestMail!");/邮件主题mail.setUser("123");/用户名mail.setPassword("123”);/密码mail.setContent("这是个测试，请不要回复！");/邮件正文mail.addAttachment("utf8中.txt");/添加附件/mail.addAtta

47、chment(/"e:/test.htm");/添加附件System.out.println(mail.send();/发送System.out.println("SENDER-"+this.getId()+":/>"+"邮件已发送完毕！");.start();publicclassBASE64Encoder(privatestaticcharcodec_table=('A','B','C','D','E','F','G','H','I','J','K','L&