messagereader.java

Eclipse RCP下编写的工作管理软件代码

package net.sf.pim.mail.reader;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.lang.reflect.Field;

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Part;

import jp.gr.java_conf.roadster.net.pop.POP3Folder;
import jp.gr.java_conf.roadster.net.pop.POP3Message;
import net.sf.pim.mail.MailUtil;

import org.eclipse.swt.widgets.Composite;
/**
 * @author levin
 */
public class MessageReader extends FileMessageReader {
	public MessageReader(Composite parent, int style) {
		super(parent, style);
	}

	//取邮件体
	protected Object getMessageBody(Part msg) throws MessagingException, IOException {
		//投机一下，直接用ie的mht规范显示邮件，先不考虑附件的优化
		if(msg instanceof POP3Message){
			//将邮件内容全部写一个后缀为mht的临时文件中，再展示
			try {
				String fileName=((POP3Message) msg).getInternalFileName();
				File messageFile=new File(System.getProperty("java.io.tmpdir", "c:/tmp/")+fileName+".mht");
				//还可以用一下缓存，呵呵
				if(!messageFile.exists()){
					Field field2=POP3Folder.class.getDeclaredField("dataDirectory");
					field2.setAccessible(true);
					File dataDirectory=(File) field2.get(((POP3Message)msg).getFolder());
					MailUtil.copyIntput2Output(new FileInputStream(new File(dataDirectory,fileName)), new FileOutputStream(messageFile));
				}
				return messageFile.toURL();
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		return super.getMessageBody(msg);
	}

	@Override
	public void showMessage(Message msg) throws MessagingException {
		super.showMessage(msg);
		String key= ((POP3Message) msg).getInternalFileName();
		if(!FolderViewer.getReadSet().contains(key)){
			FolderViewer.getReadSet().add(key);
		}
	}
}