java：收发邮件代码 看看吧~

[vae819723280]

这是代码:

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.net.*;
import java.io.*;
import javax.swing.*;

public class MailTest {
	public static void main(String[] args) {
		Frame frame = new MailTestFrame();
		frame.show();
	}
}

class MailTestFrame extends Frame implements ActionListener {
	private BufferedReader in;
	private PrintWriter out;
	private TextField from;
	private TextField to;
	private TextField smtpServer;
	private TextArea message;
	private TextArea response;
	
	public MailTestFrame() {
		setTitle("MailTest");
		setSize(300, 300);
		addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});

		getContentPane().setLayout(new GridBagLayout());
		GridBagConstraints gbc = new GridBagConstraints();
		// 当容器比组件要大时，只调整垂直方向组件的大小
		gbc.fill = GridBagConstraints.HORIZONTAL;
		gbc.weightx = 0;
		gbc.weighty = 0;
		
		gbc.weightx = 0;
		add(new Label("发送地址:"), gbc, 0, 0, 1, 1);
		gbc.weightx = 100;
		from = new TextField(20);
		add(from, gbc, 1, 0, 1, 1);

		gbc.weightx = 0;
		add(new Label("收件地址:"), gbc, 0, 1, 1, 1);
		gbc.weightx = 100;
		to = new TextField(20);
		add(to, gbc, 1, 1, 1, 1);

		gbc.weightx = 0;
		add(new Label("SMTP服务器:"), gbc, 0, 2, 1, 1);
		gbc.weightx = 100;
		smtpServer = new TextField(20);
		add(smtpServer, gbc, 1, 2, 1, 1);

		gbc.fill = GridBagConstraints.BOTH;
		gbc.weighty = 100;
		message = new TextArea();
		add(new ScrollPane(), gbc, 0, 3, 2, 1);

		response = new TextArea();
		add(new ScrollPane(), gbc, 0, 4, 2, 1);

		gbc.weighty = 0;
		Button sendButton = new Button("发送");
		sendButton.addActionListener(this);
		Panel buttonPanel = new Panel();
		buttonPanel.add(sendButton);
		add(buttonPanel, gbc, 0, 5, 2, 1);
	}

	private Container getContentPane() {
		// TODO Auto-generated method stub
		return null;
	}

	private void add(Component c, GridBagConstraints gbc, int x, int y, int w,
			int h) {
		gbc.gridx = x;
		gbc.gridy = y;
		gbc.gridwidth = w;
		gbc.gridheight = h;
		getContentPane().add(c, gbc);
	}

	public void actionPerformed(ActionEvent evt) {
		// 异步机制，使得当所有的awt事件发生后才进行以下工作
		SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				sendMail();
			}
		});
	}

	public void sendMail() {
		try {
			Socket s = new Socket(smtpServer.getText(), 25);
			out = new PrintWriter(s.getOutputStream());
			in = new BufferedReader(new InputStreamReader(s.getInputStream()));
			String hostName = InetAddress.getLocalHost().getHostName();

			send(null);
			// 传送本机域名
			send("HELO " + hostName);
			// 传送发信者信箱名称
			send("MAIL FROM: " + from.getText());
			// 传送收信者信箱名称
			send("RCPT TO: " + to.getText());
			// 发送信箱数据，包括信头和信体
			send("DATA");
			out.println(message.getText());
			// 发送结束标志
			send(".");
			s.close();
		} catch (IOException exception) {
			response.append("Error: " + exception);
		}
	}

	public void send(String s) throws IOException {
		if (s != null) {
			response.append(s + "\n");
			out.println(s);
			out.flush();
		}
		String line;
		if ((line = in.readLine()) != null)
			response.append(line + "\n");
	}
}

错误在

public void actionPerformed(ActionEvent evt) {
		// 异步机制，使得当所有的awt事件发生后才进行以下工作
		SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				sendMail();
			}
		});
	}

提示是：Multiple markers at this line
- Access restriction: The method invokeLater(Runnable) from the type SwingUtilities is not accessible due to restriction on
required library C:\Program Files\Java\jdk1.7.0\jre\lib\rt.jar
- Access restriction: The type SwingUtilities is not accessible due to restriction on required library C:\Program Files\Java
\jdk1.7.0\jre\lib\rt.jar


请问是rt.jar的问题，还是代码问题？帮忙解答下啊~~

[masterz]

你的代码在jdk 1.6下有点问题。用下面的在jdk6下面跑一下试试。
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.net.*;
import java.io.*;
import javax.swing.*;

public class MailTest {
public static void main(String[] args) {
Frame frame = new MailTestFrame();
frame.show();
}
}

class MailTestFrame extends Frame implements ActionListener {
private BufferedReader in;
private PrintWriter out;
private TextField from;
private TextField to;
private TextField smtpServer;
private TextArea message;
private TextArea response;
public MailTestFrame() {
setTitle("MailTest");
setSize(300, 300);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setLayout(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
// 当容器比组件要大时，只调整垂直方向组件的大小
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.weightx = 0;
gbc.weighty = 0;

gbc.weightx = 0;
add(new Label("发送地址:"), gbc, 0, 0, 1, 1);
gbc.weightx = 100;
from = new TextField(20);
add(from, gbc, 1, 0, 1, 1);

gbc.weightx = 0;
add(new Label("收件地址:"), gbc, 0, 1, 1, 1);
gbc.weightx = 100;
to = new TextField(20);
add(to, gbc, 1, 1, 1, 1);

gbc.weightx = 0;
add(new Label("SMTP服务器:"), gbc, 0, 2, 1, 1);
gbc.weightx = 100;
smtpServer = new TextField(20);
add(smtpServer, gbc, 1, 2, 1, 1);

gbc.fill = GridBagConstraints.BOTH;
gbc.weighty = 100;
message = new TextArea();
add(message, gbc, 0, 3, 2, 1);

response = new TextArea();
add(response, gbc, 0, 4, 2, 1);

gbc.weighty = 0;
Button sendButton = new Button("发送");
sendButton.addActionListener(this);
Panel buttonPanel = new Panel();
buttonPanel.add(sendButton);
add(buttonPanel, gbc, 0, 5, 2, 1);
}

private void add(Component c, GridBagConstraints gbc, int x, int y, int w,
int h) {
gbc.gridx = x;
gbc.gridy = y;
gbc.gridwidth = w;
gbc.gridheight = h;
add(c, gbc);
}

public void actionPerformed(ActionEvent evt) {
// 异步机制，使得当所有的awt事件发生后才进行以下工作
// java.awt.EventQueue.invokeLater(new Runnable() {
// public void run() {
// sendMail();
// }
// });


SwingUtilities.invokeLater(new Runnable() {
public void run() {
sendMail();
}
});
}

public void sendMail() {
println("sendMail() start");
try {
Socket s = new Socket(smtpServer.getText(), 25);
out = new PrintWriter(s.getOutputStream());
in = new BufferedReader(new InputStreamReader(s.getInputStream()));
String hostName = InetAddress.getLocalHost().getHostName();

send(null);
// 传送本机域名
send("HELO " + hostName);
// 传送发信者信箱名称
send("MAIL FROM: " + from.getText());
// 传送收信者信箱名称
send("RCPT TO: " + to.getText());
// 发送信箱数据，包括信头和信体
send("DATA");
out.println(message.getText());
// 发送结束标志
send(".");
s.close();
println("sendMail() done");
} catch (IOException exception) {
response.append("Error: " + exception);
}
}

public void send(String s) throws IOException {
if (s != null) {
response.append(s + "\n");
out.println(s);
out.flush();
}
String line;
if ((line = in.readLine()) != null)
response.append(line + "\n");
}
private void println(String s)
{
response.append(s + "\n");
}
}

[vae819723280]

DATA
503 bad sequence of commands
.
502 Error: command not implemented
sendMail() done


这是啥意思？ command not implemented

[vae819723280]

我想问smtp服务器是啥？运行出来了~呵呵~谢谢~