JavaMail教程：使用JavaMail搜索邮件，javamail教程,JavaMail在jav

JavaMail教程：使用JavaMail搜索邮件，javamail教程,JavaMail在jav

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。

下面是完整代码：

package cn.outofmemory.javamail;   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();       }                www.2cto.com      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？  [java] view plaincopy  /**      * 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!");                   }               }           }       }}