最近在做邮件归档，然后需要解析邮件导出的eml，记录每封邮件的归档时间，发件人、标题、发件时间、归档的目录
以下是一个demo示例：待完成此功能后再优化后续代码
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
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.Properties;
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;
import org.apache.commons.lang.StringUtils;
public class eml {
public static void main(String args[]) throws Exception {
Files.walkFileTree(Paths.get("G:\\测试数据\\hehe\\eml"),
new SimpleFileVisitor<Path>() {
@Override
public FileVisitResult visitFile(Path file,
BasicFileAttributes attrs) throws IOException {
try {
if (file.toFile().getAbsolutePath().endsWith(".eml")) {
parserFile(file.toFile().getAbsolutePath());
}
} catch (Exception e) {
e.printStackTrace();
}
return super.visitFile(file, attrs);
}
});
}
//http://blog.csdn.net/aassdd_zz/article/details/8204344
public static void parserFile(String emlPath) throws Exception {
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);
parseEml(msg);
}
private static void parseEml(Message msg) throws Exception {
// 发件人信息
Address[] froms = msg.getFrom();
if (froms != null) {
// System.out.println("发件人信息:" + froms[0]);
InternetAddress addr = (InternetAddress) froms[0];
System.out.println("发件人地址:" + addr.getAddress());
System.out.println("发件人显示名:" + addr.getPersonal());
}
System.out.println("邮件主题:" + 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());
System.out.println("内容" + msg.getContent());
}
}
/**
* @param part
* 解析内容
* @throws Exception
*/
private static void rePart(Part part) throws Exception {
if (part.getDisposition() != null) {
String strFileNmae = part.getFileName();
if(!StringUtils.isEmpty(strFileNmae))
{ // MimeUtility.decodeText解决附件名乱码问题
strFileNmae=MimeUtility.decodeText(strFileNmae);
System.out.println("发现附件: "+ strFileNmae);
InputStream in = part.getInputStream();// 打开附件的输入流
// 读取附件字节并存储到文件中
java.io.FileOutputStream out = new FileOutputStream(strFileNmae);
int data;
while ((data = in.read()) != -1) {
out.write(data);
}
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());
}
}
}
/**
* @param multipart
* // 接卸包裹（含所有邮件内容(包裹+正文+附件)）
* @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/alternative
if (part.getContent() instanceof Multipart) {
Multipart p = (Multipart) part.getContent();// 转成小包裹
// 递归迭代
reMultipart(p);
} else {
rePart(part);
}
}
}
public static void test(String emlPath) {
try {
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);
String[] date = msg.getHeader("Date");
Address[] from = msg.getFrom();
for (Address address : from) {
InternetAddress internetAddress = (InternetAddress) address;
System.out.println(internetAddress.getAddress());
System.out.println(internetAddress.getPersonal());
}
System.out.println(msg.getSubject());
Address[] to = msg.getReplyTo();
Object o = msg.getContent();
if (msg.isMimeType("multipart/*") || msg.isMimeType("MULTIPART/*")) {
System.out.println("multipart");
Multipart mp = (Multipart) o;
int totalAttachments = mp.getCount();
if (totalAttachments > 0) {
for (int i = 0; i < totalAttachments; i++) {
Part part = mp.getBodyPart(i);
String s = getMailContent(part);
String attachFileName = part.getFileName();
String disposition = part.getDisposition();
String contentType = part.getContentType();
if ((attachFileName != null && attachFileName
.endsWith(".ics"))
|| contentType.indexOf("text/calendar") >= 0) {
String[] dateHeader = msg.getHeader("date");
}
System.out.println(s);
System.out.println(attachFileName);
System.out.println(disposition);
System.out.println(contentType);
System.out.println("==============");
}
inMsg.close();
}
} else if (o instanceof Part) {
Part part = (Part) o;
rePart(part);
} else {
System.out.println("类型" + msg.getContentType());
System.out.println("内容" + msg.getContent());
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static String getMailContent(Part part) throws Exception {
String contenttype = part.getContentType();
int nameindex = contenttype.indexOf("name");
boolean conname = false;
if (nameindex != -1) {
conname = true;
}
StringBuilder bodytext = new StringBuilder();
if (part.isMimeType("text/plain") && !conname) {
bodytext.append((String) part.getContent());
} else if (part.isMimeType("text/html") && !conname) {
bodytext.append((String) part.getContent());
} else if (part.isMimeType("multipart/*")) {
Multipart multipart = (Multipart) part.getContent();
int counts = multipart.getCount();
for (int i = 0; i < counts; i++) {
getMailContent(multipart.getBodyPart(i));
}
} else if (part.isMimeType("message/rfc822")) {
getMailContent((Part) part.getContent());
} else {
}
return bodytext.toString();
}
}
package cn.sh.ideal.eml;
import javax.mail.Address;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeUtility;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.*;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Properties;
public class Emlparsing {
public void parsingEml(String path) throws Exception{
//邮件解析
Files.walkFileTree(Paths.get(path),new SimpleFileVisitor<Path>() {
@Override
public FileVisitResult visitFile(Path path, BasicFileAttributes attrs) throws IOException {
try {
if (path.toFile().getAbsolutePath().endsWith(".eml")) {
parserFile(path.toFile().getAbsolutePath());
}
} catch (Exception e) {
e.printStackTrace();
}
return super.visitFile(path, attrs);
}
});
}
/**
* 解析eml文件为Message对象
* @param emlPath eml路径
* @throws Exception
*/
public void parserFile(String emlPath) throws Exception {
Session session = Session.getDefaultInstance(new Properties(), null);
InputStream inMsg = new FileInputStream(emlPath);
Message msg = new MimeMessage(session, inMsg);
parseEml(msg,emlPath);
}
/**
* 解析Message对象
* @param msg
* @param emlPath
* @throws Exception
*/
private void parseEml(Message msg,String emlPath) throws Exception {
Eml eml=new Eml();
//发件人信息
Address[] froms = msg.getFrom();
if (froms != null) {
InternetAddress addr = (InternetAddress) froms[0];
eml.setSendAccount(addr.getAddress());
eml.setSendName(MimeUtility.decodeText(addr.getPersonal()));
}
//eml文件目录
eml.setPath(emlPath);
//邮件主题
eml.setTheme(msg.getSubject());
//发信时间
eml.setSendTime(msg.getSentDate());
return;
//暂未处理邮件内容和附件，如需处理还需要接下面方法。
}
// *
// * 解析附件及内容
// * @param msg
// * @throws Exception
//
// private static void parseContent(Message msg) throws Exception{
// //getContent() 是获取包裹内容, Part相当于外包装
// Object obj = msg.getContent();
// if (obj instanceof Multipart) {
// Multipart multipart = (Multipart) obj;
// reMultipart(multipart);
// } else if (obj instanceof Part) {
// Part part = (Part) obj;
// rePart(part);
// } else {
// System.out.println("类型" + msg.getContentType());
// System.out.println("内容" + msg.getContent());
// }
// }
//
// *
// * @param multipart
// * // 接卸包裹（含所有邮件内容(包裹+正文+附件)）
// * @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/alternative
// if (part.getContent() instanceof Multipart) {
// //System.out.println("****我是一个小包裹****");
// Multipart p = (Multipart) part.getContent();// 转成小包裹
// // 递归迭代
// reMultipart(p);
// } else {
// //非小包裹，解析
// rePart(part);
// }
// }
// }
// *
// * @param part
// * 解析内容
// * @throws Exception
//
// private static void rePart(Part part) throws Exception {
// //获取附件，保存附件
// if (part.getDisposition() != null) {
// String strFileNmae = part.getFileName();
// if(!Empty.isEmpty(strFileNmae))
// { // MimeUtility.decodeText解决附件名乱码问题
// strFileNmae=MimeUtility.decodeText(strFileNmae);
// // 打开附件的输入流
// InputStream in = part.getInputStream();
// // 读取附件字节并存储到文件中
// java.io.FileOutputStream out = new FileOutputStream(strFileNmae);
// int data;
// while ((data = in.read()) != -1) {
// out.write(data);
// }
// in.close();
// out.close();
// }
// } else {
// if (part.getContentType().startsWith("text/plain")) {
// System.out.println("文本内容：" + part.getContent());
//
// }
// }
// }
}