JavaMail获取邮件内容

import java.io.FileOutputStream;
import java.io.InputStream;
import java.util.Properties;
import javax.mail.BodyPart;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.Part;
import javax.mail.Session;
import javax.mail.Store;
public class ParserMail {
/**
* 获取邮件内容
* @param args
* @throws Exception
*/
private static String host="pop3.163.com";

public static void main(String[] args) throws Exception {
Properties props=new Properties();
//设置邮件接收协议为pop3
props.setProperty("mail.store.protocol", "pop3");
props.setProperty("mail.pop3.host", host);

Session session = Session.getInstance(props);
Store store = session.getStore("pop3");
//连接要获取数据的邮箱 主机+用户名+密码
store.connect(host, "xxx@163.com", "xxx");
Folder folder = store.getFolder("inbox");
//设置邮件可读可写
folder.open(Folder.READ_WRITE);

Message[] messages = folder.getMessages();

for (int i = 0; i < messages.length; i++) {
//解析发件人地址
String address = messages[i].getFrom()[0].toString();
//解析邮件主题
String subject = messages[i].getSubject();
//如果只是纯文本文件情况
//String content = (String) messages[i].getContent();
//MIME中包含文本情况
//getTextMultipart(messages[i]);
//MIME中包含图片情况
//getPicMultipart(messages[i]);
//MIME中包含附件情况
//getAttachmentMultipart(messages[i]);
//解析综合数据情况
getAllMultipart(messages[i]);
}
folder.close(true);
store.close();

}
/**
* 解析综合数据
* @param part
* @throws Exception
*/
private static void getAllMultipart(Part part) throws Exception{
String contentType = part.getContentType();
int index = contentType.indexOf("name");
boolean conName = false;
if(index!=-1){
conName=true;
}
//判断part类型
if(part.isMimeType("text/plain") && ! conName) {
System.out.println((String) part.getContent());
}else if (part.isMimeType("text/html") && ! conName) {
System.out.println((String) part.getContent());
}else if (part.isMimeType("multipart/*")) {
Multipart multipart = (Multipart) part.getContent();
int counts = multipart.getCount();
for (int i = 0; i < counts; i++) {
//递归获取数据
getAllMultipart(multipart.getBodyPart(i));
//附件可能是截图或上传的(图片或其他数据)
if (multipart.getBodyPart(i).getDisposition() != null) {
//附件为截图
if (multipart.getBodyPart(i).isMimeType("image/*")) {
InputStream is = multipart.getBodyPart(i)
.getInputStream();
String name = multipart.getBodyPart(i).getFileName();
String fileName;
//截图图片
if(name.startsWith("=?")){
fileName = name.substring(name.lastIndexOf(".") - 1,name.lastIndexOf("?="));
}else{
//上传图片
fileName = name;
}

FileOutputStream fos = new FileOutputStream("D:\\"
+ fileName);
int len = 0;
byte[] bys = new byte[1024];
while ((len = is.read(bys)) != -1) {
fos.write(bys,0,len);
}
fos.close();
} else {
//其他附件
InputStream is = multipart.getBodyPart(i)
.getInputStream();
String name = multipart.getBodyPart(i).getFileName();
FileOutputStream fos = new FileOutputStream("D:\\"
+ name);
int len = 0;
byte[] bys = new byte[1024];
while ((len = is.read(bys)) != -1) {
fos.write(bys,0,len);
}
fos.close();
}
}
}
}else if (part.isMimeType("message/rfc822")) {
getAllMultipart((Part) part.getContent());
}
}

/**
* 解析附件内容
* @param part
* @throws Exception
*/
private static void getAttachmentMultipart(Part part) throws Exception{
if(part.isMimeType("multipart/*")){
Multipart multipart = (Multipart) part.getContent();
int count = multipart.getCount();
for (int i = 0; i < count; i++) {
BodyPart bodyPart = multipart.getBodyPart(i);
if(bodyPart.getDisposition()!=null){
InputStream is = bodyPart.getInputStream();
FileOutputStream fos=new FileOutputStream("路径+文件名");
int len=0;
byte[] bys=new byte[1024];
while((len=is.read(bys))!=-1){
fos.write(bys, 0, len);
}
fos.close();
}
}
}

}
/**
* 解析图片内容
* @param part
* @throws Exception
*/
private static void getPicMultipart(Part part) throws Exception{
if(part.isMimeType("multipart/*")){
Multipart multipart = (Multipart) part.getContent();
int count = multipart.getCount();
for (int i = 0; i < count; i++) {
BodyPart bodyPart = multipart.getBodyPart(i);
if(bodyPart.isMimeType("image/*")){
InputStream is = bodyPart.getInputStream();
FileOutputStream fos=new FileOutputStream("路径+文件名");
int len=0;
byte[] bys=new byte[1024];
while((len=is.read(bys))!=-1){
fos.write(bys, 0, len);
}
fos.close();
}
}
}
}
/**
* 解析文本内容
* @param part
* @throws Exception
*/
private static void getTextMultipart(Part part) throws Exception{
if(part.isMimeType("text/html")){
String content = (String) part.getContent();
System.out.println(content);
}else if(part.isMimeType("text/plain")){
String content = (String) part.getContent();
System.out.println(content);
}
}
}