java实现读取163邮箱，qq邮箱的邮件内容

admin管理员组

文章数量:1646328

通过使用java mail来实现读取163邮箱，qq邮箱的邮件内容。

1.代码实现：

创建springboot项目，引入依赖包

 <!--mail-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
        </dependency>

实现类

import com.sun.mail.imap.IMAPFolder;
import com.sun.mail.imap.protocol.IMAPProtocol;
import org.apache.tomcat.util.http.fileupload.IOUtils;
import org.springframework.util.ObjectUtils;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;
import java.io.*;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;

public class ShowMail {

    public static String NORM_DATETIME_PATTERN = "yyyy-MM-dd hh:mm:ss";
    private MimeMessage mimeMessage;
    /**
     * 附件下载后的存放目录
     */
    private String saveAttachPath = "";
    /**
     * 存放邮件内容的StringBuffer对象
     */
    private StringBuffer bodyText = new StringBuffer();

    /**
     * 构造函数,初始化一个MimeMessage对象
     *
     * @param mimeMessage
     */
    public ShowMail(MimeMessage mimeMessage) {
        this.mimeMessage = mimeMessage;
    }

    /**
     * 获得发件人的地址和姓名
     *
     * @return
     * @throws MessagingException
     */
    public String getFrom() throws MessagingException {
        InternetAddress address[] = (InternetAddress[]) mimeMessage.getFrom();
        String from = address[0].getAddress();
        if (from == null) {
            from = "";
        }
        String personal = address[0].getPersonal();

        if (personal == null) {
            personal = "";
        }

        String fromAddr = null;
        if (personal != null || from != null) {
            fromAddr = personal + "<" + from + ">";
        }
        return fromAddr;
    }

    /**
     * 获得邮件的收件人，抄送，和密送的地址和姓名，根据所传递的参数的不同
     *
     * @param type "to"----收件人　"cc"---抄送人地址　"bcc"---密送人地址
     * @return
     * @throws MessagingException
     * @throws UnsupportedEncodingException
     */
    public String getMailAddress(String type) throws MessagingException, UnsupportedEncodingException {
        if (ObjectUtils.isEmpty(type)) {
            return "";
        }

        String addType = type.toUpperCase();

        if (!addType.equals("TO") && !addType.equals("CC") && !addType.equals("BCC")) {
            return "";
        }
        InternetAddress[] address;

        if (addType.equals("TO")) {
            address = (InternetAddress[]) mimeMessage.getRecipients(Message.RecipientType.TO);
        } else if (addType.equals("CC")) {
            address = (InternetAddress[]) mimeMessage.getRecipients(Message.RecipientType.CC);
        } else {
            address = (InternetAddress[]) mimeMessage.getRecipients(Message.RecipientType.BCC);
        }

        if (ObjectUtils.isEmpty(address)) {
            return "";
        }
        StringBuilder mailAddr = new StringBuilder();
        String emailAddr;
        String personal;
        for (int i = 0; i < address.length; i++) {
            emailAddr = address[i].getAddress();
            if (emailAddr == null) {
                emailAddr = "";
            } else {
                emailAddr = MimeUtility.decodeText(emailAddr);
            }
            personal = address[i].getPersonal();
            if (personal == null) {
                personal = "";
            } else {
                personal = MimeUtility.decodeText(personal);
            }
            mailAddr.append(",").append(personal).append("<").append(emailAddr).append(">");
        }
        return mailAddr.toString().substring(1);
    }

    /**
     * 获得邮件主题
     *
     * @return
     * @throws MessagingException
     * @throws Unsupported

本文标签： 邮箱邮件内容Javaqq