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
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。
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, "[email protected]", "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: