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再说说缺点:首先java功能强大的背后是其复杂性,就拿web来说,当今流行的框架有很多,什么struts,spring,jQuery等等,而这无疑增加了java的复杂性。smtp利用ESMTP/SMTP举行邮件发送,碰到一个成绩:
假设附件为图片gif文件,发送没有成绩。可是吸收后,没法显现图片。敬请妙手指导!!!!!
/*
*Createdon2004-12-21
*
*TODOTochangethetemplateforthisgeneratedfilegoto
*Window-Preferences-Java-CodeStyle-CodeTemplates
*/
/**
*@authorAdministrator
*
*TODOTochangethetemplateforthisgeneratedtypecommentgoto
*Window-Preferences-Java-CodeStyle-CodeTemplates
*/
publicclassFoxMailMain{
publicstaticvoidmain(String[]args){
FoxMailfoxMail=newFoxMail("smtp.citiz.net",25);
foxMail.setMailUserName("zhou");
foxMail.setMailUserPass("abcdefgf");
foxMail.setMailTo("aaaaa@citiz.net");
foxMail.setMailFrom("bbbb@citiz.net");
foxMail.setMailShowTo("tom");
foxMail.setMailShowFrom("Nike");
foxMail.setMailSubject("hello用中文主题");
foxMail.setMailBody("welcomeforyou.mmm.中文呀.aaa
载来一行");
foxMail.setMailAttachFile(newString[]{"D:eclipse_projectworkspacePROJECT_emailsrcpic.gif"});
if(foxMail.sendMail()){
System.out.println("OK.");
}else{
System.out.println("False.");
}
}
}
FoxMail.java代码
importjava.io.File;
importjava.io.FileInputStream;
importjava.io.FileNotFoundException;
importjava.io.IOException;
importjava.io.InputStream;
importjava.io.OutputStream;
importjava.net.Socket;
importjava.text.DateFormat;
importjava.text.SimpleDateFormat;
importjava.util.Date;
/*
*Createdon2004-12-21
*
*TODOTochangethetemplateforthisgeneratedfilegoto
*Window-Preferences-Java-CodeStyle-CodeTemplates
*/
/**
*@authorAdministrator
*
*TODOTochangethetemplateforthisgeneratedtypecommentgoto
*Window-Preferences-Java-CodeStyle-CodeTemplates
*/
publicclassFoxMail{
privatefinalstaticbyteLOCATION_TO_SCREEN=1;//Log信息输入地位1=输入到屏幕
privatefinalstaticDateFormatdateformat=newSimpleDateFormat("yyyy-MM-ddHH:mm:ss");//日记用日期格局
privatefinalstaticStringEND_FLAG="
";//SMTP/ESMTP命令停止标志
privatefinalstaticStringEMAIL_ATTACH_SIGN="=====att";//邮件附件的暗示标记
privateStringsmtpServer=null;//邮件发送服务器域名
privateintsmtpPort=25;//邮件发送端口
privateSocketclientMailSocket;//邮件毗连socket
privateInputStreaminData;//吸收数据
privateOutputStreamoutData;//发送数据
privateStringmailUserName=null;//邮件账户
privateStringmailUserPass=null;//邮件账户的暗码
privateStringmailTo=null;//邮件发送方针
privateStringmailFrom=null;//邮件发送人
privateStringmailSubject=null;//邮件主题
privateStringmailBody=null;//邮件注释
privateStringmailShowTo=null;//邮件内容仰面部分-邮件发送方针
privateStringmailShowFrom=null;//邮件内容仰面部分-邮件发送人
privateString[]mailAttachFile=null;//邮件附件对应的当地文件名(包括相对路径)
/**
*@returnReturnsthemailAttachFile.
*/
publicString[]getMailAttachFile(){
returnmailAttachFile;
}
/**
*@parammailAttachFileThemailAttachFiletoset.
*/
publicvoidsetMailAttachFile(String[]mailAttachFile){
this.mailAttachFile=mailAttachFile;
}
/**
*@returnReturnsthemailShowFrom.
*/
publicStringgetMailShowFrom(){
returnmailShowFrom;
}
/**
*@parammailShowFromThemailShowFromtoset.
*/
publicvoidsetMailShowFrom(StringmailShowFrom){
this.mailShowFrom=mailShowFrom;
}
/**
*@returnReturnsthemailShowTo.
*/
publicStringgetMailShowTo(){
returnmailShowTo;
}
/**
*@parammailShowToThemailShowTotoset.
*/
publicvoidsetMailShowTo(StringmailShowTo){
this.mailShowTo=mailShowTo;
}
/**
*@returnReturnsthemailBody.
*/
publicStringgetMailBody(){
returnmailBody;
}
/**
*@parammailBodyThemailBodytoset.
*/
publicvoidsetMailBody(StringmailBody){
this.mailBody=mailBody;
}
/**
*@returnReturnsthemailFrom.
*/
publicStringgetMailFrom(){
returnmailFrom;
}
/**
*@parammailFromThemailFromtoset.
*/
publicvoidsetMailFrom(StringmailFrom){
this.mailFrom=mailFrom;
}
/**
*@returnReturnsthemailSubject.
*/
publicStringgetMailSubject(){
returnmailSubject;
}
/**
*@parammailSubjectThemailSubjecttoset.
*/
publicvoidsetMailSubject(StringmailSubject){
this.mailSubject=mailSubject;
}
/**
*@returnReturnsthemailTo.
*/
publicStringgetMailTo(){
returnmailTo;
}
/**
*@parammailToThemailTotoset.
*/
publicvoidsetMailTo(StringmailTo){
this.mailTo=mailTo;
}
/**
*@returnReturnsthemailUserName.
*/
publicStringgetMailUserName(){
returnmailUserName;
}
/**
*@parammailUserNameThemailUserNametoset.
*/
publicvoidsetMailUserName(StringmailUserName){
this.mailUserName=mailUserName;
}
/**
*@returnReturnsthemailUserPass.
*/
publicStringgetMailUserPass(){
returnmailUserPass;
}
/**
*@parammailUserPassThemailUserPasstoset.
*/
publicvoidsetMailUserPass(StringmailUserPass){
this.mailUserPass=mailUserPass;
}
/**
*Constrctor
*@param_smtpServer
*@param_smtpPort
*/
publicFoxMail(StringsmtpServer,intsmtpPort){
this.smtpServer=smtpServer;
this.smtpPort=smtpPort;
}
/**
*写日记信息
*@param_log
*@param_locaton
*/
publicstaticvoidprintLogger(String_log,int_locaton){
switch(_locaton){
caseLOCATION_TO_SCREEN:
System.out.println("["+dateformat.format(newDate())+"]"+_log);
break;
default:
System.out.println("["+dateformat.format(newDate())+"]"+_log);
}//switch(_locaton)
}//end
/**
*
*@return
*/
publicbooleancreateConnection(){
try{
freeAll();
clientMailSocket=newSocket(smtpServer,smtpPort);
printLogger("Connecttoemailserver"+smtpServer+"onport"+smtpPort,LOCATION_TO_SCREEN);
inData=clientMailSocket.getInputStream();
outData=clientMailSocket.getOutputStream();
fetchCMDResult();//当初次毗连服务器后有前往值,必需取走该前往值,不然前面命令的前往值没法判别
}catch(IOExceptione){
returnfalse;
}
returntrue;
}
publicstaticStringresponse(InputStreamin){
byte[]buffer=newbyte[1024];
StringBufferinData=newStringBuffer();
intn=0;
try{
n=in.read(buffer);
inData.append(newString(buffer,0,n));
}catch(IOExceptione){
//TODOAuto-generatedcatchblock
e.printStackTrace();
}
printLogger("CMDResult="+inData.toString(),LOCATION_TO_SCREEN);
returninData.toString();
}
publicstaticvoidsend(Strings,OutputStreamout){
byte[]buffer=s.getBytes();
try{
out.write(buffer);
out.flush();
}catch(IOExceptione){
//TODOAuto-generatedcatchblock
e.printStackTrace();
}
}
publicStringfetchCMDResult(){
returnresponse(inData);
}
publicbooleansendCmd(String_cmd){
if(_cmd!=null){
send(_cmd,outData);
printLogger("CMD="+_cmd,LOCATION_TO_SCREEN);
}
returntrue;
}
/**
*发送邮件
*服务器为ESMTP时分接纳本办法
*@returntrue=sendok,false=sendfailed
*/
publicbooleansendMail(){
//翻开与邮件服务器的毗连
if(!createConnection()){
returnfalse;
}
StringBuffertheContent=null;
//EHLO
theContent=newStringBuffer();
theContent.append("EHLO");
theContent.append(smtpServer);
theContent.append(END_FLAG);
sendCmd(theContent.toString());
if(fetchCMDResult().indexOf("250")==-1)returnfalse;
//AUTHLOGIN
theContent=newStringBuffer();
theContent.append("AUTHLOGIN");
theContent.append(END_FLAG);
sendCmd(theContent.toString());
if(fetchCMDResult().indexOf("334")==-1)returnfalse;
//用户名
theContent=newStringBuffer();
theContent.append(Base64Encode(this.mailUserName));
theContent.append(END_FLAG);
sendCmd(theContent.toString());
if(fetchCMDResult().indexOf("334")==-1)returnfalse;
//暗码
theContent=newStringBuffer();
theContent.append(Base64Encode(this.mailUserPass));
theContent.append(END_FLAG);
sendCmd(theContent.toString());
if(fetchCMDResult().indexOf("235")==-1)returnfalse;
//邮件发送者
theContent=newStringBuffer();
theContent.append("MAILFROM:");
theContent.append("<");
theContent.append(this.mailFrom);
theContent.append(">");
theContent.append(END_FLAG);
sendCmd(theContent.toString());
if(fetchCMDResult().indexOf("250")==-1)returnfalse;
//邮件发送方针地点
theContent=newStringBuffer();
theContent.append("RCPTTO:");
theContent.append("<");
theContent.append(this.mailTo);
theContent.append(">");
theContent.append(END_FLAG);
sendCmd(theContent.toString());
if(fetchCMDResult().indexOf("250")==-1)returnfalse;
//邮件内容-入手下手
theContent=newStringBuffer();
theContent.append("DATA");
theContent.append(END_FLAG);
sendCmd(theContent.toString());
if(fetchCMDResult().indexOf("354")==-1)returnfalse;
//邮件内容-邮件仰面部分
theContent=newStringBuffer();
theContent.append("From:");
theContent.append(this.mailShowFrom);
theContent.append(END_FLAG);
theContent.append("To:");
theContent.append(this.mailShowTo);
theContent.append(END_FLAG);
theContent.append("Subject:");
theContent.append(this.mailSubject);
theContent.append(END_FLAG);
theContent.append("Mime-Version:1.0");
theContent.append(END_FLAG);
theContent.append("Content-Type:multipart/mixed;Boundary="");//设置附件暗示符
theContent.append(EMAIL_ATTACH_SIGN);
theContent.append(""");
theContent.append(END_FLAG);//在注释内容前必需有2个END_FLAG标志
theContent.append(END_FLAG);
sendCmd(theContent.toString());
//邮件内容-注释部分
theContent=newStringBuffer();
theContent.append("--");
theContent.append(EMAIL_ATTACH_SIGN);
theContent.append(END_FLAG);
theContent.append("Content-type:text/plain;");
theContent.append(END_FLAG);
theContent.append("Content-Transfer-Encoding:base64");
theContent.append(END_FLAG);
theContent.append(END_FLAG);
theContent.append(Base64Encode(this.mailBody));
theContent.append(END_FLAG);
theContent.append(END_FLAG);
sendCmd(theContent.toString());
//邮件内容-附件部分
//mailAttachFile=null;
if(mailAttachFile!=null&&mailAttachFile.length>0){
for(inti=0;i<this.mailAttachFile.length;i++){
//发送附件仰面
theContent=newStringBuffer();
theContent.append("--");
theContent.append(EMAIL_ATTACH_SIGN);
theContent.append(i);
theContent.append(END_FLAG);
theContent.append("Content-Type:image/gif;name="aaa.gif"");
theContent.append(END_FLAG);
theContent.append("Content-Transfer-Encoding:base64");
theContent.append(END_FLAG);
theContent.append("Content-Disposition:attachment;name="aaa.gif"");
theContent.append(END_FLAG);
theContent.append(END_FLAG);
sendCmd(theContent.toString());
//发送附件内容
sendBase64Data(newStringBuffer(Base64Encode(readFile(mailAttachFile[i]))));
//发送附件停止
/*
theContent=newStringBuffer();
theContent.append(END_FLAG);
theContent.append("--");
theContent.append(EMAIL_ATTACH_SIGN);
theContent.append(i);
theContent.append("--");
theContent.append(END_FLAG);
sendCmd(theContent.toString());
*/
}
}
//发送附件停止
theContent=newStringBuffer();
theContent.append(END_FLAG);
theContent.append(END_FLAG);
theContent.append("--");
theContent.append(EMAIL_ATTACH_SIGN);
theContent.append("--");
theContent.append(END_FLAG);
sendCmd(theContent.toString());
//邮件内容-停止标志
theContent=newStringBuffer();
theContent.append(END_FLAG);
theContent.append(".");
theContent.append(END_FLAG);
sendCmd(theContent.toString());
if(fetchCMDResult().indexOf("250")==-1)returnfalse;
//加入断开服务器毗连
theContent=newStringBuffer();
theContent.append("QUIT");
theContent.append(END_FLAG);
sendCmd(theContent.toString());
fetchCMDResult();
//邮件发送乐成后开释资本
freeAll();
theContent=null;
returntrue;//邮件发送乐成
}
/**
*发送经由Base64编码后的数据
*@paramsrc
*/
publicvoidsendBase64Data(StringBuffersrcData){
intLEN_CMD_DATA=76;
intstartIndex=0;
inttotalLength=0;
if(srcData!=null&&srcData.length()>0){
totalLength=srcData.length();
while(true){
if(startIndex+LEN_CMD_DATA<totalLength){
sendCmd(srcData.substring(startIndex,startIndex+LEN_CMD_DATA));
sendCmd(END_FLAG);
}else{
sendCmd(srcData.substring(startIndex,totalLength));
sendCmd(END_FLAG);
break;
}
startIndex=startIndex+LEN_CMD_DATA;
}
}
}
/**
*开释一切资本
*
*/
publicvoidfreeAll(){
if(inData!=null){
try{
inData.close();
}catch(IOExceptione){
//TODOAuto-generatedcatchblock
e.printStackTrace();
}
inData=null;
}
if(outData!=null){
try{
outData.close();
}catch(IOExceptione){
//TODOAuto-generatedcatchblock
e.printStackTrace();
}
outData=null;
}
if(clientMailSocket!=null){
try{
clientMailSocket.close();
}catch(IOExceptione){
//TODOAuto-generatedcatchblock
e.printStackTrace();
}
clientMailSocket=null;
}
}
/**
*读取文件内容
*@paramfileName
*@return
*/
publicStringreadFile(StringfileName){
byte[]fileBuffer=newbyte[1024];
intrealSize=0;
StringBufferreadContent=newStringBuffer();
try{
InputStreaminFile=newFileInputStream(newFile(fileName));
while(true){
realSize=inFile.read(fileBuffer);
if(-1==realSize)break;
readContent.append(newString(fileBuffer,0,realSize));
}
}catch(FileNotFoundExceptione){
//TODOAuto-generatedcatchblock
e.printStackTrace();
}catch(IOExceptione){
//TODOAuto-generatedcatchblock
e.printStackTrace();
}
returnreadContent.toString();
}
/**
*Base64编码函数
*将指定的字符串编码为Base64格局的字符串
*@paramsrc
*@return
*/
publicstaticStringBase64Encode(Stringsrc){
if(src==null||src.length()==0)
return"";
StringEncodingTable="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
byte[]Buffer=src.getBytes();
intReadNow,i,res;
char[]WriteBuf=newchar[4];
char[]Buf=newchar[3];
StringEncodedStr="";
intReadIndex=0;
intLen=Buffer.length;
booleanisEnd;
intBytesWritten=0;
ReadNow=0;
do{
isEnd=false;
for(i=0;i<3;i++){
if(ReadIndex>=Len){
isEnd=true;
ReadNow=i;
break;
}
Buf[i]=(char)(((byte)Buffer[ReadIndex])&0x00FF);
ReadIndex=ReadIndex+1;
}
if(isEnd)
break;
WriteBuf[0]=EncodingTable.charAt((Buf[0]>>2)&0x003F);
WriteBuf[1]=EncodingTable
.charAt(((Buf[0]&3)<<4|(Buf[1]>>4))&0x003F);
WriteBuf[2]=EncodingTable
.charAt(((Buf[1]&15)<<2|(Buf[2]>>6))&0x003F);
WriteBuf[3]=EncodingTable.charAt((Buf[2]&63)&0x003F);
for(i=0;i<4;i++)
EncodedStr=EncodedStr+WriteBuf[i];
BytesWritten=BytesWritten+4;
if((BytesWritten%76)==0){
EncodedStr=EncodedStr+"";
}
}while(ReadNow!=3);
if(ReadNow<3){
switch(ReadNow){
case1:
WriteBuf[0]=EncodingTable.charAt((Buf[0]>>2)&0x003F);
WriteBuf[1]=EncodingTable
.charAt(((Buf[0]&3)<<4)&0x003F);
WriteBuf[2]==;
WriteBuf[3]==;
for(i=0;i<4;i++)
EncodedStr=EncodedStr+WriteBuf[i];
break;
case2:
WriteBuf[0]=EncodingTable.charAt((Buf[0]>>2)&0x003F);
WriteBuf[1]=EncodingTable
.charAt(((Buf[0]&3)<<4|(Buf[1]>>4))&0x003F);
WriteBuf[2]=EncodingTable
.charAt(((Buf[1]&15)<<2)&0x003F);
WriteBuf[3]==;
for(i=0;i<4;i++)
EncodedStr=EncodedStr+WriteBuf[i];
break;
default:
break;
}
}
return(EncodedStr);
}
}
如果你学习的是市场营销,是销售,也许参加大课堂的学习会更合适,因为你的工作能力中有个基础就是搭建自己的人脉, |
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