JavaMail学习笔记（六）、搜索邮件

迈不过友情╰ 2022-06-10 00:23 226阅读 0赞

JavaMail在javax.mail.search包中定义了一个用于创建搜索条件的SearchTerm类，应用程序创建SearchTerm类的实例对象后，就可以调用Folder.Search(SearchTerm st)方法搜索邮件夹中符合搜索条件的所有邮件。SearchTerm是一个抽象类，JavaMail提供了22个实现子类以帮助应用程序创建不同的搜索条件，这22个类可分为两大类型，如下所示：

**1、用于创建逻辑组合关系的类**

*  AND条件（AndTerm类）
 *  OR条件（OrTerm类）
 *  NOT条件（NotTerm类）
 *  Comparison条件（ComparisonTerm类）

**2、用于创建具体搜索条件的类**

*  DATE条件（SentDateTerm、ReceivedDateTerm类）
 *  CONTENT条件（BodyTerm类）
 *  HEADER条件（FromStringTerm、RecipientStringTerm、SubjectTerm类等）

*下面通过实现来说明以上类的用法及含义：*

1、搜索发件人为“智联招聘“，而且邮件正文包含“Java工程师“的所有邮件

SearchTerm andTerm = new AndTerm(
    	new FromStringTerm("智联招聘"),
    	new BodyTerm("java工程师"));
    Message[] messages = folder.search(andTerm);

2、搜索发件人为“智联招聘“或主题包含“最新职位信息“的所有邮件

SearchTerm orTerm = new OrTerm(
    	new FromStringTerm("智联招聘"), 
    	new SubjectTerm("最新职位信息"));
    Message[] messages = folder.search(orTerm);

3、搜索发件人不包含“智联招聘“所有的邮件

SearchTerm notTerm = new NotTerm(new FromStringTerm("智联招聘"));
    Message[] messages = folder.search(notTerm);

4、搜索周一到今天收到的的所有邮件

Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.DAY_OF_WEEK, calendar.get(Calendar.DAY_OF_WEEK - (Calendar.DAY_OF_WEEK - 1)) - 1);
    Date mondayDate = calendar.getTime();
    SearchTerm comparisonTermGe = new SentDateTerm(ComparisonTerm.GE, mondayDate);
    SearchTerm comparisonTermLe = new SentDateTerm(ComparisonTerm.LE, new Date());
    SearchTerm comparisonAndTerm = new AndTerm(comparisonTermGe, comparisonTermLe);
    Message[] messages = folder.search(comparisonAndTerm);

5、搜索大于或等于100KB的所有邮件

int mailSize = 1024 * 100;
    SearchTerm intComparisonTerm = new SizeTerm(IntegerComparisonTerm.GE, mailSize);
    Message[] messages = folder.search(intComparisonTerm);

ComparisonTerm类常用于日期和数字比较中，它使用六个常量EQ（＝）、GE（>=）、GT（>）、LE（<=）、LT（<）、NE（!=）来表示六种不同的比较操作。  
  
*完整代码：*

package org.yangxin.study.jm;
    
    import java.io.BufferedReader;
    import java.io.InputStreamReader;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.Properties;
    
    import javax.mail.Flags.Flag;
    import javax.mail.Folder;
    import javax.mail.Message;
    import javax.mail.Session;
    import javax.mail.Store;
    import javax.mail.URLName;
    import javax.mail.internet.MimeMessage;
    import javax.mail.internet.MimeUtility;
    import javax.mail.search.AndTerm;
    import javax.mail.search.BodyTerm;
    import javax.mail.search.ComparisonTerm;
    import javax.mail.search.FromStringTerm;
    import javax.mail.search.IntegerComparisonTerm;
    import javax.mail.search.NotTerm;
    import javax.mail.search.OrTerm;
    import javax.mail.search.SearchTerm;
    import javax.mail.search.SentDateTerm;
    import javax.mail.search.SizeTerm;
    import javax.mail.search.SubjectTerm;
    
    /**
     * 搜索邮件
     */
    public class SearchMailTest {
    	
    	public static void main(String[] args) throws Exception {
    		Properties props = new Properties();
    		props.setProperty("mail.pop3.auth", "true");
    		Session session = Session.getInstance(props);
    		URLName url = new URLName("pop3", "pop3.163.com", 110, null, "xyang81@163.com", "yX546900873");
    		Store store = session.getStore(url);
    		store.connect();
    		// 得到收件箱
    		Folder folder = store.getFolder("INBOX");
    		// 以读写模式打开收件箱
    		folder.open(Folder.READ_WRITE);
    		
    		Message[] messages = search(folder);
    		
    		System.out.println("收件箱中共有:" + folder.getMessageCount() + "封邮件，搜索到" + messages.length + "封符合条件的邮件!");
    		
    		// 解析邮件搜索到的邮件
    		POP3ReceiveMailTest.parseMessage(messages);	
    		
    		// 根据用户输入的条件搜索所有邮件,并提示用户是否删除
    		//searchDemo(folder);
    		
    		folder.close(true);
    		store.close();
    	}
    	
    	public static Message[] search(Folder folder) throws Exception {
    		// 搜索主题包含美食的邮件
    		String subject = "java培训";
    		SearchTerm subjectTerm = new SubjectTerm(subject);
    		
    		// 搜索发件人包含支付宝的邮件
    		SearchTerm fromTerm = new FromStringTerm("支付宝");
    		
    		// 搜索邮件内容包含"招聘"的邮件
    		SearchTerm bodyTerm = new BodyTerm("招聘");
    		
    		// 搜索发件人不包含“智联招聘”的邮件
    		SearchTerm notTerm = new NotTerm(new FromStringTerm("智联招聘"));
    		
    		// 搜索发件人为“智联招聘”，而且内容包含“Java工程师“的邮件
    		SearchTerm andTerm = new AndTerm(
    				new FromStringTerm("智联招聘"),
    				new BodyTerm("java工程师"));
    		
    		
    		// 搜索发件人为”智联招聘“或主题包含”最新职位信息“的邮件
    		SearchTerm orTerm = new OrTerm(
    				new FromStringTerm("智联招聘"), 
    				new SubjectTerm("最新职位信息"));
    		
    
    		// 搜索周一到今天收到的的所有邮件
    		Calendar calendar = Calendar.getInstance();
    		calendar.set(Calendar.DAY_OF_WEEK, calendar.get(Calendar.DAY_OF_WEEK - (Calendar.DAY_OF_WEEK - 1)) - 1);
    		Date mondayDate = calendar.getTime();
    		SearchTerm comparisonTermGe = new SentDateTerm(ComparisonTerm.GE, mondayDate);
    		SearchTerm comparisonTermLe = new SentDateTerm(ComparisonTerm.LE, new Date());
    		SearchTerm comparisonAndTerm = new AndTerm(comparisonTermGe, comparisonTermLe);
    		
    		// 搜索大于或等100KB的所有邮件
    		int mailSize = 1024 * 100;
    		SearchTerm intComparisonTerm = new SizeTerm(IntegerComparisonTerm.GE, mailSize);
    		
    		return folder.search(intComparisonTerm);
    	}
     }

**实例：根据用户输入的收件人（email地址或姓名）和主题作为搜索条件，并提示用户是否删除搜索到的邮件？**

/**
    	 * 根据用户输入的收件人地址（包括email地址和姓名）和主题作为搜索条件，并提示用户是否删除搜索到的邮件
    	 * @param from 收件人
    	 * @param subject 主题
    	 */
    	public static void searchDemo(Folder folder) throws Exception {
    		String notifyMsg = "收件箱中一共有" + folder.getMessageCount() + "封邮件。请选择操作：\n";
    		notifyMsg += "1、输入收件人\n" + "2、输入主题\n" + "3、开始搜索\n" + "4、退出";
    		System.out.println(notifyMsg);
    		String from = null;
    		String subject = null;
    		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    		String oper = reader.readLine().trim();
    		while(!(from != null && subject != null)) {
    			if ("4".equals(oper)) {
    				System.exit(0);
    			} else {
    				if ("1".equals(oper)) {
    					System.out.print("请输入收件人：");
    					from = reader.readLine();
    				}  else if ("2".equals(oper)) {
    					System.out.print("请输入主题：");
    					subject = reader.readLine();
    				} else if ("3".equals(oper)) {
    					if (from == null || subject == null) {
    						System.out.println("未输入搜索条件，无法进行搜索！");
    					} else {
    						break;
    					}
    				}
    			}
    			System.out.print("请选择操作：");
    			oper = reader.readLine().trim();
    		}
    		
    		System.out.println("\n系统正在根据搜索条件查询所有邮件，请稍候......\n");
    		
    		// 根据输入的条件，创建SearchTerm实例对象
    		SearchTerm orTerm = new OrTerm(
    				new FromStringTerm(from),
    				new SubjectTerm(subject)
    				);
    		
    		// 根据搜索条件得到搜索到的邮件列表
    		Message[] messages = folder.search(orTerm);
    		
    		System.out.println("共搜索到" + messages.length + "封满足搜索条件的邮件！\n\n请选择操作：1、查看邮件\t 2、删除所有邮件");
    		
    		String deleteQuestion = "是否要删除搜索到的邮件?(yes/no)";
    		
    		String searchResultOper = reader.readLine();
    		
    		if ("1".equals(searchResultOper)) {
    			for (Message message : messages) {
    				MimeMessage msg = (MimeMessage) message;
    				String sub = POP3ReceiveMailTest.getSubject(msg);
    				System.out.println("开始查看第" + msg.getMessageNumber() + "封邮件...");
    				System.out.println("主题: " + sub);
    				System.out.println("发件人: " + POP3ReceiveMailTest.getFrom(msg));
    				System.out.println("收件人：" + POP3ReceiveMailTest.getReceiveAddress(msg, null));
    				System.out.println("发送时间：" + POP3ReceiveMailTest.getSentDate(msg, null));
    				System.out.println(deleteQuestion);
    				String answer = reader.readLine();
    				if ("yes".equals(answer)) {
    					msg.setFlag(Flag.DELETED, true);
    					System.out.println("邮件[" + sub + "]删除成功!");
    				} else if ("no".equals(answer)) {
    					System.out.println("第" + msg.getMessageNumber() + "封邮件查看完成！");
    				} else if ("stop".equals(answer)) {
    					System.exit(0);
    				}
    				System.out.println();
    			}
    		} else {
    			System.out.println(deleteQuestion);
    			String answer = reader.readLine();
    			if ("yes".equals(answer)) {
    				for (Message message : messages) {
    					String sub = MimeUtility.decodeText(message.getSubject());
    					message.setFlag(Flag.DELETED, true);
    					System.out.println("邮件[" + sub + "]删除成功!");
    				}
    			}
    		}
    	}

*搜索结果：*

***1、搜索条件，收件人：智联招聘    主题：最新招聘信息 ***

![1340085493_7783.jpg][]

***2、搜索条件，收件人：支付宝   主题：信用卡***

![1340085461_7059.jpg][]

[1340085493_7783.jpg]: https://img-my.csdn.net/uploads/201206/19/1340085493_7783.jpg
[1340085461_7059.jpg]: https://img-my.csdn.net/uploads/201206/19/1340085461_7059.jpg