利用J2ME和servlet技术实现手机发送邮件

来源：互联网发布：滤波算法怎么创新编辑：程序博客网时间：2024/04/30 01:14

这两天一直在研究手机端如何利用java技术来发送邮件，之前学习了在电脑端利用Java发送邮件的原理，那么手机端能否像电脑端那样，直接把邮件发给邮箱服务器呢？听说现在MIDlet2.0也支持这样发邮件，但是具体如何实现没有深究。我想，能否通过手机把参数和内容发送给电脑端，然后让电脑帮助我们发邮件呢？经过搜索资料，发现答案是肯定的。这里就利用到servlet技术：手机作为客户端，电脑作为服务端（其实就是通常说的代理）。

servlet 的配置是最令人头疼的，我的大部分时间都花在这里。

以下是步骤：

1.在tomcat的webapps目录下建mail文件夹，再里面建WEB-INF文件夹，然后再WEB-INF里面建classes和lib文件夹，一个web.xml文件，classes里放的是编译后的servlet类（编译时要把tomcat的servlet-api.jar放到jre的ext文件夹中），lib放的是要用到的jar文件，这里我们要把mail.jar（J2EE的一个邮件的jar文件）放到里面去，否则访问servlet时会出错。web.xml内容如下：

<?xml version="1.0" encoding="ISO-8859-1"?>

<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>

<servlet>
    <servlet-name>MailServlet </servlet-name>
    <servlet-class>com.j2medev.mail.MailServlet</servlet-class>
   </servlet>

<servlet-mapping>
    <servlet-name>MailServlet</servlet-name>
    <url-pattern>/MailServlet</url-pattern>
</servlet-mapping>

</web-app>

然后通过http://localhost:6060/mail/MailServlet访问servlet，成功通过手机发送邮件。

发邮件只是很小的一部分，至于如何收取邮件，在电脑端建立数据库存储邮件，监听有无新邮件，这些都是以后的事了。

以下是测试代码：

servlet：

package com.j2medev.mail;import java.io.DataInputStream;import java.io.IOException;import java.io.PrintWriter;import java.util.Properties;import javax.servlet.ServletConfig;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.mail.*;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeBodyPart;import javax.mail.internet.MimeMessage;import javax.mail.internet.MimeMultipart;import javax.mail.internet.MimeMessage.RecipientType;import java.util.*;import java.net.*;public class MailServlet extends HttpServlet {private static String host;private static String from;/*public void init(ServletConfig config) throws ServletException {super.init(config);//host = config.getInitParameter("host");//from = config.getInitParameter("from");//System.out.println(host + from);}*/protected void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException { doPost(request, response);}protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {response.setContentType("text/html;charset=GB2312");PrintWriter out=response.getWriter();out.println("<html>");out.println("<body>");out.println("<title>");out.println("fuck java mail!");out.println("</title>");out.println("</body>");out.println("</html>");DataInputStream dis = new DataInputStream(request.getInputStream());String send = dis.readUTF();String from="792553306@qq.com";//String send ="792553306@qq.com"; String subject = dis.readUTF();//String subject ="subject";String content = dis.readUTF();//String content="content";try {Properties props = new Properties();// Setup mail serverprops.put("mail.smtp.auth", "true");// props.put("mail.smtp.host", host);// Get sessionSession session = Session.getDefaultInstance(props);// Define messageMimeMessage message = new MimeMessage(session);// Set the from addressmessage.setFrom(new InternetAddress(from));// message.setRecipients(Message.RecipientType.TO,send);// Set the to addressmessage.setRecipient(RecipientType.TO, new InternetAddress(send));message.setRecipients(RecipientType.TO, InternetAddress.parse(from));// Set the subjectmessage.setSubject(subject);// Set the contentmessage.setText(content);//message.setFrom(from);// 设置发件人//InternetAddress to = new InternetAddress(tto);//message.setRecipient(Message.RecipientType.TO, to);// 设置收件人//message.setRecipients(RecipientType.TO, InternetAddress.parse(afrom));// 如果是多个收信人//message.setSubject(ttitle);// 设置主题//message.setText(tcontent);// 设置信件内容BodyPart mdp = new MimeBodyPart();// 新建一个存放信件内容的BodyPart对象mdp.setContent(content, "text/html;charset=gb2312"); // 给BodyPart对象设置内容和格式/编码方式Multipart test = new MimeMultipart();// 新建一个MimeMultipart对象用来存放对象test.addBodyPart(mdp);// 将BodyPart加入到MimeMultipart对象中message.setContent(test);// 把mm作为消息对象的内容// 发送邮件message.saveChanges();// 存储邮件信息Transport transport = session.getTransport("smtp");transport.connect("smtp.qq.com", from, "51332lin");// 以smtp方式登录邮箱// 注意这一步需要你的用户名和密码，务必正确，才能正常发送transport.sendMessage(message, message.getAllRecipients());// 发送邮件,其中第二个参数是所有已设好的收件人地址transport.close();// Send message} catch (Exception e) {e.printStackTrace();}}}

手机端，4个类 MailClient为主类 ContentForm为内容窗口 MainForm为主窗口 Message为一般类

package mail;import java.io.DataOutputStream;import java.io.IOException;import javax.microedition.midlet.MIDlet;import javax.microedition.midlet.MIDletStateChangeException;import javax.microedition.lcdui.*;import javax.microedition.io.*;public class MailClient extends MIDlet{private MainForm mainForm;private ContentForm contentForm;private Display display;private Message message;public Message getMessage(){return message;}public void setMessage(Message message){this.message = message;}public void displayAlert(String text, AlertType type, Displayable disp){Alert alert = new Alert("Application Error");alert.setString(text);alert.setType(type);alert.setTimeout(2000);display.setCurrent(alert, disp);}public ContentForm getContentForm(){return contentForm;}public Display getDisplay(){return display;}public MainForm getMainForm(){return mainForm;}public void initMIDlet(){MailThread t = new MailThread(this);t.start();message = new Message();display = Display.getDisplay(this);mainForm = new MainForm(this, "Simple Mail Client");contentForm = new ContentForm("Content", "content", 150, TextField.ANY, this);display.setCurrent(mainForm);}protected void startApp() throws MIDletStateChangeException{ initMIDlet();}protected void pauseApp(){ }protected void destroyApp(boolean arg0) throws MIDletStateChangeException{ }}class MailThread extends Thread{private MailClient midlet;public MailThread(MailClient midlet){this.midlet = midlet;}public void run(){synchronized(midlet){try{midlet.wait();}catch(Exception e){e.printStackTrace();}}System.out.println("connecting to server.....");HttpConnection httpConn = null;DataOutputStream dos = null;try{httpConn = (HttpConnection)Connector.open("http://localhost:6060/mail/MailServlet");httpConn.setRequestMethod("POST");//if(httpConn.getResponseCode()==HttpConnection.HTTP_OK)//System.out.println("OK"+httpConn.getResponseCode()+"/n");dos = new DataOutputStream(httpConn.openOutputStream());dos.writeUTF(midlet.getMessage().getTo());dos.writeUTF(midlet.getMessage().getSubject());dos.writeUTF(midlet.getMessage().getContent());dos.flush(); dos.close();// 不注释这里有错误显示 httpConn.close();System.out.println("end of sending mail");}catch(IOException e){}}} //////////////////////////////////////////////////////package mail;import javax.microedition.lcdui.Command;import javax.microedition.lcdui.CommandListener;import javax.microedition.lcdui.Displayable;import javax.microedition.lcdui.TextBox;import javax.microedition.midlet.MIDlet;public class ContentForm extends TextBox implements CommandListener{private MailClient midlet;private boolean first = true;public static final Command sendCommand = new Command("SEND", Command.ITEM,1);public ContentForm(String arg0, String arg1, int arg2, int arg3,MailClient midlet){super(arg0, arg1, arg2, arg3);this.midlet = midlet;if (first){first = false;init();}}public void init(){this.addCommand(sendCommand);this.setCommandListener(this);}public void commandAction(Command cmd, Displayable disp){if (cmd == sendCommand){String content = this.getString();midlet.getMessage().setContent(content);System.out.println(midlet.getMessage());try{synchronized (midlet){midlet.notify();}} catch (Exception e){}}}} ////////////////////////////////////////////////////** Created on 2004-12-8** TODO To change the template for this generated file go to* Window - Preferences - Java - Code Style - Code Templates*/package mail;import javax.microedition.lcdui.*;import javax.microedition.midlet.MIDlet;/*** @author P2800** TODO To change the template for this generated type comment go to Window -* Preferences - Java - Code Style - Code Templates*/public class MainForm extends Form implements CommandListener{private MailClient midlet;private TextField toField;private TextField subField; private boolean first = true;public static final Command nextCommand = new Command("NEXT", Command.OK, 1);public MainForm(MailClient midlet, String arg0){super(arg0);this.midlet = midlet;if(first){first = false;init();}}public void init(){toField = new TextField("To:","792553306@qq.com", 25, TextField.ANY);subField = new TextField("Subject:", "subject", 30, TextField.ANY);this.append(toField);this.append(subField);this.addCommand(nextCommand);this.setCommandListener(this); }public void commandAction(Command cmd,Displayable disp){if(cmd == nextCommand){String to = toField.getString();String subject = subField.getString();if(to == "" && subject == ""){midlet.displayAlert("Null to or sub",AlertType.WARNING,this);}else{midlet.getMessage().setTo(to);midlet.getMessage().setSubject(subject);midlet.getDisplay().setCurrent(midlet.getContentForm());}}}}/////////////////////////////////////////////package mail;public class Message{ private String to;private String subject;private String content;public Message(){}public Message(String to, String subject, String content){this.to = to;this.subject = subject;this.content = content;}public String getContent(){return content;}public void setContent(String content){this.content = content;}public String getSubject(){return subject;}public void setSubject(String subject){this.subject = subject;} public String getTo(){return to;}public void setTo(String to){this.to = to;}public String toString(){return to+subject+content;}}