主要是通過TreeMap來排序。
import java.util.Iterator;
import java.util.Set;
import java.util.TreeMap;
public class MapTest
{
public static void main(String args[])
{
TreeMap<Integer, String> maps = new TreeMap<Integer, String>();
maps.put(2, "Test2");
maps.put(1, "Test1");
maps.put(4, "Test4");
maps.put(3, "Test3");
Set set = maps.keySet();
Iterator iter = set.iterator();
while (iter.hasNext())
{
Object key = iter.next();
System.out.println(key + " " + maps.get(key));
}
}
}
import java.util.Set;
import java.util.TreeMap;
public class MapTest
{
public static void main(String args[])
{
TreeMap<Integer, String> maps = new TreeMap<Integer, String>();
maps.put(2, "Test2");
maps.put(1, "Test1");
maps.put(4, "Test4");
maps.put(3, "Test3");
Set set = maps.keySet();
Iterator iter = set.iterator();
while (iter.hasNext())
{
Object key = iter.next();
System.out.println(key + " " + maps.get(key));
}
}
}
]]>
{
String str = "我ABC們";
char[] ch = new char[4];
str.getChars(1, 5, ch, 0);
System.out.println(String.valueOf(ch));
}
]]>
public class DataThread extends Thread
{
public void run()
{
SendThread send = null; Thread SendThread = new Thread(send); while (true) { try { if ("0158".equals(WmsFormatter.toParamTime(new Date()).substring(0, 4))) { if (SendThread.isAlive()) { send.close();
} } if (!hostSendThread.isAlive()) { send = new SendThread(); SendThread = new Thread(send); SendThread.start(); } Thread.sleep(50000); }catch (Exception e) { try { e.printStackTrace(); continue; } catch (Exception e1) { continue; } } } } public static void main(String[] args) { new DataThread().start(); }SendThread.java
public class SendThread implements Runnable{ private boolean flag = true; public void close() { flag = false; } public void run() { while (flag == true) { 
} }
}]]>
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1.驗證發件人的授權
新建java類，MyAuthenticator.java 內容如下：
import javax.mail.PasswordAuthentication;class MyAuthenticator extends javax.mail.Authenticator{ private String strUser; private String strPwd; public MyAuthenticator(String user, String password) { this.strUser = user; this.strPwd = password; } protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(strUser, strPwd); }}2.SMTP郵件發送
新建java類，SendEmail.java 內存如下：
import javax.activation.DataHandler;import javax.activation.FileDataSource;import javax.mail.BodyPart;import javax.mail.Message;import javax.mail.Multipart;import javax.mail.Session;import javax.mail.Transport;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeBodyPart;import javax.mail.internet.MimeMessage;import javax.mail.internet.MimeMultipart;public class SendEmail{ private static String host = ""; // SMTP服務器地址 private static String password = ""; // 密碼 private static String from = ""; // 發件人 private static String to = ""; // 收件人 private static String cc = “”; // 抄送人（中間使用;隔開） public static void send(String subject, String content, String filename) { Properties props = System.getProperties(); props.put("mail.smtp.host", host);//指定SMTP服務器 props.put("mail.transpost.protocol", "smtp"); props.put("mail.smtp.port", "25"); props.put("mail.smtp.auth", "true");//指定是否需要SMTP驗證 //需要SSL安全驗證 props.setProperty("mail.smtp.starttls.enable", "true"); // props.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");// props.setProperty("mail.smtp.socketFactory.fallback", "false");// props.setProperty("mail.smtp.socketFactory.port", "25"); try { MyAuthenticator myauth = new MyAuthenticator(from, password); Session mailSession = Session.getDefaultInstance(props, myauth); mailSession.setDebug(true);//是否在控制臺顯示debug信息 Message message = new MimeMessage(mailSession); message.setFrom(new InternetAddress(from));//發件人 message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));//收件人 // 是否有抄送人 if (!StringUtil.isBlank(cc)) { String[] bccs = cc.split(";"); InternetAddress bcc = null; InternetAddress[] bccAddrs = new InternetAddress[bccs.length]; for (int i = 0; i < bccs.length; i++) { if (!"".equals(bccs[i].trim())) { bcc = new InternetAddress(bccs[i].trim()); bccAddrs[i] = bcc; } } message.setRecipients(Message.RecipientType.CC, bccAddrs); } message.setSubject(subject);//郵件主題 // 有附件 if (!StringUtil.isBlank(filename)) { Multipart mp = new MimeMultipart(); BodyPart bp = new MimeBodyPart(); bp.setContent(content, "text/html;charset=utf-8");//郵件正文 mp.addBodyPart(bp); File file = new File(filename); if (file.exists()) { BodyPart mdp = new MimeBodyPart(); FileDataSource fileds = new FileDataSource(file); mdp.setDataHandler(new DataHandler(fileds)); mdp.setFileName(fileds.getName()); mp.addBodyPart(mdp); } message.setContent(mp); } // 無附件 else { message.setContent(content, "text/html;charset=utf-8");//郵件正文 } message.saveChanges(); Transport.send(message); } catch (Exception e) { return; } } public static void main(String[] args) { SendEmail.send("測試郵件", "郵件發送測試！", "本地附件地址"); }]]>
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