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使用Java发送带附件的附件的示例

2019年07月22日  | 移动技术网IT编程  | 我要评论

这里使用的是javamail技术,前台使用了fckeditor做邮件美化,由于只是示例,后台发送时只是将邮件保存在本地,但是可以查看,如果需要实际发送,请参考我的其他博客文章,我写了很多关于邮件发送的示例!

20151124175853817.png (908×548)

jsp页面页面除了引用fckeditor外,要注意我们是需要发送附件的:

<%@ page language="java" import="java.util.*" pageencoding="utf-8"%> 
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 
<% 
string path = request.getcontextpath(); 
string basepath = request.getscheme()+"://"+request.getservername()+":"+request.getserverport()+path+"/"; 
%> 
<!doctype html public "-//w3c//dtd html 4.01 transitional//en"> 
<html> 
 <head> 
  <base href="<%=basepath%>"> 
  <title>发送邮件</title> 
  <meta http-equiv="pragma" content="no-cache"> 
  <meta http-equiv="cache-control" content="no-cache"> 
  <meta http-equiv="expires" content="0">   
  <script type="text/javascript" src="fckeditor/fckeditor.js"></script> 
  <script type="text/javascript"> 
  window.onload=function(){ 
    var ofckeditor = new fckeditor( 'content' ) ; 
    //编译器基本路径 
    ofckeditor.basepath = "/pro_04/fckeditor/"; 
    //高度 
    ofckeditor.width=800; 
    //宽度 
    ofckeditor.height=300; 
    //工具条集合名称(default,basic或自己制定,关于fck的使用,博客内有专门文章) 
    //具体的配置可以将默认显示出来然后到fck目录里的fckconfig.js里 
    //fckconfig.toolbarsets["default"]数组中去除不要的功能一共63个功能属性 
    //ofckeditor.toolbarset="basic"; 
    ofckeditor.replacetextarea() ;      
  } 
  </script> 
 </head> 
 <body> 
  <!-- 注意表单格式,这里需要上传附件 --> 
  <form action="sendmailservlet" method="post" enctype="multipart/form-data"> 
  <table> 
    <tr> 
      <td>收件人:</td> 
       <td><input type="text" name="to" /></td> 
    </tr> 
    <tr> 
      <td>抄送:</td> 
       <td><input type="text" name="copy" /></td> 
    </tr> 
    <tr> 
      <td>主题:</td> 
       <td><input type="text" name="title" /></td> 
    </tr> 
    <tr> 
      <td>信件内容:</td> 
      <td><textarea rows="10" cols="20" name="content" id="content"></textarea></td> 
    </tr> 
    <tr> 
      <td>附件:</td> 
      <td><input type='file' name='ufile' /></td> 
    </tr> 
    <tr> 
      <td>背景音乐:</td> 
      <td><input type='file' name='umusic' /></td> 
    </tr> 
    <tr> 
      <td>背景图片:</td><!-- 背景图片我们后台自己准备 --> 
      <td> 
        <select name="bgimg"> 
          <option value="1">一号</option> 
          <option value="2">二号</option> 
        </select> 
      </td> 
    </tr> 
    <tr align="right"> 
      <td colspan="2"><input type="submit" value="发 送"></td> 
    </tr> 
  </table>    
  </form> 
 </body> 
</html> 

 
 
为了防止乱码,会经过一个过滤器:

package org.filter; 
import java.io.ioexception; 
import javax.servlet.filter; 
import javax.servlet.filterchain; 
import javax.servlet.filterconfig; 
import javax.servlet.servletexception; 
import javax.servlet.servletrequest; 
import javax.servlet.servletresponse; 
/** 
 * 过滤器防止乱码 
 * @说明 
 * @author cuisuqiang 
 * @version 1.0 
 * @since 
 */ 
public class encodingfilter implements filter { 
  public void destroy() { 
  } 
  public void dofilter(servletrequest request, servletresponse response, 
      filterchain chain) throws ioexception, servletexception { 
    request.setcharacterencoding("utf-8"); 
    response.setcharacterencoding("utf-8"); 
    chain.dofilter(request, response); 
  } 
  public void init(filterconfig arg0) throws servletexception { 
  } 
} 


然后到servlet处理附件和信息,这里就不做异常处理了,出错直接报错:

package org.servlet; 
import java.io.*; 
import java.util.*; 
import javax.servlet.servletexception; 
import javax.servlet.http.httpservlet; 
import javax.servlet.http.httpservletrequest; 
import javax.servlet.http.httpservletresponse; 
import org.apache.commons.fileupload.fileitem; 
import org.apache.commons.fileupload.fileitemfactory; 
import org.apache.commons.fileupload.fileuploadexception; 
import org.apache.commons.fileupload.disk.diskfileitemfactory; 
import org.apache.commons.fileupload.servlet.servletfileupload; 
import org.entity.mailmodel; 
import org.mail.sendmail; 
/** 
 * 接收表单,处理附件,组装邮件对象,并调用发送接口 
 * @说明 在c盘创建临时文件 
 * @author cuisuqiang 
 * @version 1.0 
 * @since 
 */ 
@suppresswarnings("serial") 
public class sendmailservlet extends httpservlet { 
  @suppresswarnings( { "unchecked", "deprecation" }) 
  @override 
  protected void service(httpservletrequest request, 
      httpservletresponse response) throws servletexception, ioexception { 
    // 建立磁盘工厂 
    fileitemfactory factory = new diskfileitemfactory(); 
    // 表单域 
    servletfileupload upload = new servletfileupload(factory); 
    list<fileitem> items = null; 
    string bgimg = "1"; // 默认是第一个背景图片 
    try { 
      items = upload.parserequest(request); 
    } catch (fileuploadexception e) { 
      e.printstacktrace(); 
    } 
    mailmodel mail = new mailmodel(); 
    inputstream is = null; 
    for (fileitem item : items) { 
      if (!item.isformfield()) { // 如果是附件 
        if (item.getsize() > 0) { 
          is = item.getinputstream(); 
          string filename = ""; 
          if (item.getname().indexof("\\") == -1) { 
            filename = "c:\\tmp\\" + item.getname(); 
          } else { 
            filename = "c:\\tmp\\" + item.getname().substring(item.getname().lastindexof("\\")); 
          } 
          if (is.marksupported()) { 
            system.out.println("没有上传文件或文件已经删除"); 
          } else { 
            file file = new file(filename); 
            fileoutputstream fos = new fileoutputstream(file); // 建立输出流 
            byte[] buffer = new byte[8192]; // 每次读8k字节,大文件上传没有问题 
            int count = 0; 
            while ((count = is.read(buffer)) > 0) { // 循环写入到硬盘 
              fos.write(buffer, 0, count); 
            } 
            fos.close(); // 关闭输入输出流 
            is.close(); 
            if (item.getfieldname().equals("ufile")) { 
              mail.setfilepath(filename); 
            } else if (item.getfieldname().equals("umusic")) { 
              mail.setmusicpath(filename); 
            } 
          } 
        } 
      } else { // 处理文本信息 
        if (item.getfieldname().equals("title")) { 
          mail.settitle(item.getstring("utf-8")); 
        } else if (item.getfieldname().equals("content")) { 
          mail.setcontext(item.getstring("utf-8")); 
        } else if (item.getfieldname().equals("to")) { 
          mail.setto(item.getstring("utf-8")); 
        } else if (item.getfieldname().equals("copy")) { 
          mail.setcopy(item.getstring("utf-8")); 
        } else if (item.getfieldname().equals("bgimg")) { 
          bgimg = item.getstring("utf-8"); 
        } 
      } 
    } 
    string bgpath = request.getrealpath("/") + "\\images\\bg" + bgimg + ".jpg"; 
    mail.setbgpath(bgpath); 
    try { 
      sendmail.sendmail(mail); 
    } catch (exception e) { 
      e.printstacktrace(); 
    } 
    response.sendredirect(request.getcontextpath() + "/sendmail.jsp"); 
  } 
} 

 
 
这里也没有验证,接收到信息后组装一个邮件实体对象,传递到发送接口中发送:
实体,我就不写get和set方法了:

package org.entity; 
/** 
 * 一封邮件的对象 
 * @说明 
 * @author cuisuqiang 
 * @version 1.0 
 * @since 
 */ 
public class mailmodel { 
  /** 
   * 主键 
   */ 
  private int id; 
 
  /** 
   * 邮件标题 
   */ 
  private string title; 
 
  /** 
   * 发送给谁 
   */ 
  private string to; 
 
  /** 
   * 背景图片地址 
   */ 
  private string bgpath; 
 
  /** 
   * 抄送给谁 
   */ 
  private string copy; 
 
  /** 
   * 邮件内容 
   */ 
  private string context; 
 
  /** 
   * 附件地址 
   */ 
  private string filepath; 
  /** 
   * 背景音乐地址 
   */ 
  private string musicpath; 
} 

 
 
然后我们来看看核心处理类:
 

package org.mail; 
import java.io.file; 
import java.io.fileoutputstream; 
import java.io.outputstream; 
import java.util.date; 
import java.util.properties; 
import javax.activation.datahandler; 
import javax.activation.datasource; 
import javax.activation.filedatasource; 
import javax.mail.message; 
import javax.mail.session; 
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; 
import org.entity.mailmodel; 
/** 
 * 发送一封邮件 
 * @说明 注意这里并没有实际发送而是保存在了c盘临时文件中,真是发送的话,请参考我的博客 
 * @author cuisuqiang 
 * @version 1.0 
 * @since 
 */ 
public class sendmail { 
  public static void sendmail(mailmodel mail) throws exception { 
    properties props = new properties(); 
    props.put("mail.smtp.auth", "true"); 
    session session = session.getinstance(props); 
    message message = new mimemessage(session); 
    internetaddress from = new internetaddress(); 
    from.setpersonal(mimeutility.encodetext("风中落叶<cuisuqiang@163.com>")); 
    message.setfrom(from); 
    internetaddress to = new internetaddress(mail.getto()); 
    message.setrecipient(message.recipienttype.to, to); 
    // 是否抄送 
    if (null != mail.getcopy() && !"".equals(mail.getcopy())) { 
      internetaddress copy = new internetaddress(mail.getcopy()); 
      message.setrecipient(message.recipienttype.cc, copy); 
    } 
    message.setsubject(mimeutility.encodetext(mail.gettitle())); 
    message.setsentdate(new date()); 
    // 指定为混合关系 
    mimemultipart msgmultipart = new mimemultipart("mixed"); 
    message.setcontent(msgmultipart); 
    mimebodypart content = new mimebodypart(); 
    msgmultipart.addbodypart(content); 
    // 依赖关系 
    mimemultipart bodymultipart = new mimemultipart("related"); 
    content.setcontent(bodymultipart); 
    mimebodypart htmlpart = new mimebodypart(); 
    // 组装的顺序非常重要 
    bodymultipart.addbodypart(htmlpart); 
    mimebodypart in_bg = new mimebodypart(); 
    bodymultipart.addbodypart(in_bg); 
 
    datasource bgsou = new filedatasource(mail.getbgpath()); 
    datahandler bghd = new datahandler(bgsou); 
    in_bg.setdatahandler(bghd); 
    in_bg.setheader("content-location", "bg.jpg"); 
    // 是否使用了背景音乐 
    if (null == mail.getmusicpath() || "".equals(mail.getmusicpath())) { 
      string start = "<html><body background='bg.jpg'>"; 
      string end = "</body></html>"; 
      htmlpart.setcontent(start + mail.getcontext() + end,"text/html;charset=utf-8"); 
    } else { 
      mimebodypart in_part = new mimebodypart(); 
      bodymultipart.addbodypart(in_part); 
      datasource gifds = new filedatasource(mail.getmusicpath()); 
      datahandler gifdh = new datahandler(gifds); 
      in_part.setdatahandler(gifdh); 
      in_part.setheader("content-location", "bg.mp3"); 
      string start = "<html><head><bgsound src='bg.mp3' loop='-1'></head><body background='bg.jpg'>"; 
      string end = "</body></html>"; 
      htmlpart.setcontent(start + mail.getcontext() + end,"text/html;charset=utf-8"); 
    } 
    // 组装附件 
    if (null != mail.getfilepath() && !"".equals(mail.getfilepath())) {      
      mimebodypart file = new mimebodypart(); 
      filedatasource file_datasource = new filedatasource(mail 
          .getfilepath()); 
      datahandler dh = new datahandler(file_datasource); 
      file.setdatahandler(dh); 
      file.setfilename(mimeutility.encodetext(dh.getname())); 
      msgmultipart.addbodypart(file); 
    } 
    message.savechanges(); 
    // 保存邮件 
    outputstream ips = new fileoutputstream("c:\\tmp\\test.eml"); 
    message.writeto(ips); 
    ips.close(); 
    system.out.println("------------发送完毕------------"); 
    // 删除临时文件 
    if (null != mail.getmusicpath() && !"".equals(mail.getmusicpath())) { 
      file file = new file(mail.getmusicpath()); 
      file.delete(); 
    } 
    if (null != mail.getfilepath() && !"".equals(mail.getfilepath())) { 
      file file = new file(mail.getfilepath()); 
      file.delete(); 
    } 
  } 
} 

我们把邮件发送了c盘,可以到c盘查看,如果需要实际发送,可以参考我的其他博客,有专门说明!

20151124175916125.png (712×522)

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