JavaMail学习笔记(六)、搜索邮件

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
[java]
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
[java] view plaincopy
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
[java]
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
[java]
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
[java]
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:

[java]
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(); 
    } 
             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!"); 
                } 
            } 
        } 
    } 

搜索结果:
1、搜索条件,收件人:智联招聘    主题:最新招聘信息

JavaMail学习笔记(六)、搜索邮件_第1张图片
2、搜索条件,收件人:支付宝   主题:信用卡
JavaMail学习笔记(六)、搜索邮件_第2张图片


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