sendform.java

J2ME程序设计实例教程的源码

import javax.microedition.lcdui.*;
import java.io.IOException;

/**
 * 该类描述了发送邮件。
 */
public class SendForm extends Form implements CommandListener, Runnable {
    //
    private EMailMIDlet midlet;
    private Ticker ticker;
    private TextField tfRecipients; //收件人
    private TextField tfSubject;    //主题
    private TextField tfContent;    //邮件内容
    
    private Command cmdSend = new Command("发送", Command.SCREEN, 2);
    private Command cmdBack = new Command("返回", Command.BACK, 1);
    
    public SendForm(EMailMIDlet midlet) {
        super("发送邮件");
        this.midlet = midlet;
        
        tfRecipients = new TextField("收件人：", "", 50, TextField.EMAILADDR);
        tfSubject = new TextField("主题：", "", 50, TextField.ANY);
        tfContent = new TextField("内容：","", 200, TextField.ANY);
        tfContent.setPreferredSize(super.getWidth(), 150);
        append(tfRecipients);
        append(tfSubject);
        append(tfContent);
        
        ticker = new Ticker("  编写邮件！  ");
        setTicker(ticker);
        
        addCommand(cmdSend);
        addCommand(cmdBack);
        setCommandListener(this);
    }
    
    public void clear() {
        tfRecipients.setString("");
        tfSubject.setString("");
        tfContent.setString("");
    }
    
    public void commandAction(Command cmd, Displayable d) {
        if(cmd == cmdBack) {
            midlet.backToMenu();
        }
        else if(cmd == cmdSend) {
            String recipients = tfRecipients.getString();
            if(recipients.equals("")) {
                midlet.showAlert("错误！", "请输入收件人地址！");
            }
            else {
                //创建并启动发送邮件线程
                ticker.setString("正在发送邮件，请等待......");
                removeCommand(cmdSend);
                Thread t = new Thread(this);
                t.start();
            }
        }
    }
    
    //发送邮件线程执行体
    public void run() {
        boolean isOK = true;
        try {
            EMailConfig config = EMailConfig.getInstance();
            
            String localhost = System.getProperty("microedition.platform");
            SMTPClient smtpClient = new SMTPClient(localhost);  //创建SMTP客户端
            
            //打开链接
            smtpClient.open(config.getSMTPServer(), config.getAccounts(), config.getPassword());
            
            //发送邮件
            String subject = tfSubject.getString();   //邮件主题
            String content = tfContent.getString();   //邮件内容
            String recipients = tfRecipients.getString(); //收件人
            smtpClient.send(subject, content, new String[]{recipients});
            
            //关闭连接
            smtpClient.close();
        }
        catch(IOException ioe) {
            isOK = false;
            midlet.showAlert("错误！", "网络错误！原因：\n" + ioe.toString());
        }
        catch(EMailException eme) {
            isOK = false;
            midlet.showAlert("错误！", "邮件发送错误！原因：\n" + eme.toString());
        }
        
        if(isOK) {
            ticker.setString("发送邮件成功！！！");
        }
        else {
            ticker.setString("发送邮件失败！！！请重新发送");
        }
        addCommand(cmdSend);
    }
}