使用Java解析.eml文件（标准邮件格式）

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使用Java解析.eml文件（标准邮件格式）

首先感谢大佬，Java解析eml内容和附件。

以下是我根据上述修改成自己的：（下面需要用到 mail的jar包，去网上搜一下就有了）

import java.io.*;
//import java.nio.file.FileVisitResult;
//import java.nio.file.Files;
//import java.nio.file.Path;
//import java.nio.file.Paths;
//import java.nio.file.SimpleFileVisitor;
//import java.nio.file.attribute.BasicFileAttributes;
import java.util.*;import javax.mail.Address;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.Part;
import javax.mail.Session;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;/*** 使用Java的mail包解析 标准的 .eml格式的邮件文件** @date 2019/08/07* @author linrui* */
public class JavaParseEmlTest {public static void main(String[] args) throws Exception{getEmlContent();}private static Map<Object, Object> getEmlContent() throws Exception{Map<Object, Object> map;//        Files.walkFileTree(Paths.get("D:\\selectSQLServerEamilToXML\\filePath\\super\\"), new SimpleFileVisitor<Path>() {
//            @Override
//            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
//                try {
//                    if (file.toFile().getAbsolutePath().endsWith("aa.eml")) {
//                        parserFile(file.toFile().getAbsolutePath());
//                    }
//                } catch (Exception e) {
//                    e.printStackTrace();
//                }
//
//                return super.visitFile(file, attrs);
//            }
//        });map = parserFile("C:\\Users\\lin\\Desktop\\18f5a04508.eml");System.out.println("============>" + map);return map;}/*** 解析文件** @param emlPath 文件路径* */public static Map<Object, Object> parserFile(String emlPath) throws Exception {Map<Object, Object> map;System.out.println(emlPath);Properties props = new Properties();Session session = Session.getDefaultInstance(props, null);InputStream inMsg;inMsg = new FileInputStream(emlPath);Message msg = new MimeMessage(session, inMsg);map = parseEml(msg);return map;}private static Map<Object, Object> parseEml(Message msg) throws Exception {Map<Object, Object> map = new HashMap<>(10);// 发件人信息Address[] froms = msg.getFrom();if (froms != null) {InternetAddress addr = (InternetAddress) froms[0];System.out.println("发件人地址:" + addr.getAddress());map.put("fjrAddress",addr.getAddress());System.out.println("发件人显示名:" + addr.getPersonal());map.put("fjrName", addr.getPersonal());}//收件人信息Address[] tos = msg.getAllRecipients();List<String> sjrAddressList = new ArrayList<>();for (Address a : tos) {InternetAddress addr = (InternetAddress)a;System.out.println("====>收件人地址：" + addr.getAddress());sjrAddressList.add(addr.getAddress());}map.put("sjrAddressList", sjrAddressList);System.out.println("邮件主题:" + msg.getSubject());map.put("subject", msg.getSubject());// getContent() 是获取包裹内容, Part相当于外包装Object o = msg.getContent();if (o instanceof Multipart) {Multipart multipart = (Multipart) o;reMultipart(multipart);} else if (o instanceof Part) {Part part = (Part) o;rePart(part);} else {System.out.println("类型" + msg.getContentType());map.put("type", msg.getContentType());System.out.println("内容" + msg.getContent());map.put("content", msg.getContent());}return map;}/*** 解析内容** @param part* @throws Exception*/private static void rePart(Part part) throws Exception {if (part.getDisposition() != null) {String strFileNmae = part.getFileName();if(strFileNmae != null) {// MimeUtility.decodeText解决附件名乱码问题strFileNmae=MimeUtility.decodeText(strFileNmae);System.out.println("发现附件: "+ strFileNmae);// 打开附件的输入流InputStream in = part.getInputStream();String strFile = "C:\\Users\\lin\\Desktop\\test\\" + strFileNmae;FileOutputStream out = new FileOutputStream(strFile);byte[] bytes = new byte[1024];while(in.read(bytes,0,1024) != -1){out.write(bytes);}in.close();out.close();}System.out.println("内容类型: "+ MimeUtility.decodeText(part.getContentType()));System.out.println("附件内容:" + part.getContent());} else {if (part.getContentType().startsWith("text/plain")) {System.out.println("文本内容：" + part.getContent());} else {// System.out.println("HTML内容：" + part.getContent());}}}/*** 接卸包裹（含所有邮件内容(包裹+正文+附件)）* @param multipart* @throws Exception*/private static void reMultipart(Multipart multipart) throws Exception {// System.out.println("邮件共有" + multipart.getCount() + "部分组成");// 依次处理各个部分for (int j = 0, n = multipart.getCount(); j < n; j++) {// System.out.println("处理第" + j + "部分");Part part = multipart.getBodyPart(j);// 解包, 取出 MultiPart的各个部分,// 每部分可能是邮件内容,// 也可能是另一个小包裹(MultipPart)// 判断此包裹内容是不是一个小包裹, 一般这一部分是 正文 Content-Type: multipart/alternativeif (part.getContent() instanceof Multipart) {Multipart p = (Multipart) part.getContent();// 转成小包裹// 递归迭代reMultipart(p);} else {rePart(part);}}}
}