说明:1、本程序可实现网页文件、普通文件的发送。
2、实现邮件发送需要三个jar包的支持:
commons-codec-1.3.jar、commons-httpclient-3.0.jar(这两个jar包实现抓取互联网网页内容)以及mail.jar
具体实现:
一、首先建立MailAuthenticator类,继承自javax.mail.Authenticator类。此类实现发件箱的登陆验证。
package com.company.simplemail;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;
/**
* 服务器邮箱登录验证
*/
public
class MailAuthenticator
extends Authenticator {
// 用户名(登录邮箱)
private String username;
// 密码
private String password;
/**
* 初始化邮箱和密码
* @param username 邮箱
* @param password 密码
*/
public MailAuthenticator(String username, String password){
this.username = username;
this.password = password;
}
String getPassword() {
return password;
}
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return
new PasswordAuthentication(username, password);
}
String getUsername() {
return username;
}
public
void setPassword(String password) {
this.password = password;
}
public
void setUsername(String username) {
this.username = username;
}
}
二、
建立SimpleMailSender类,此类实现邮件的单发、群发等等,是邮件发送的核心类。
package com.company.simplemail;
import java.util.List;
import java.util.Properties;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMessage.RecipientType;
import javax.mail.internet.MimeMultipart;
/**
* 简单邮件发送器,可单发,群发。
*/
public
class SimpleMailSender {
// 发送邮件的props文件
private
final
transient Properties props = System.getProperties();
// 邮件服务器登录验证
private
transient MailAuthenticator authenticator;
// 邮箱session
private
transient Session session;
/**
* 初始化邮件发送器
* @param smtpHostName SMTP邮件服务器地址
* @param username 发送邮件的用户名(地址)
* @param password 发送邮件的密码
*/
public SimpleMailSender(
final String smtpHostName,
final String username,
final String password) {
init(username, password, smtpHostName);
}
/**
* 初始化邮件发送器
* @param username 发送邮件的用户名(地址),并以此解析SMTP服务器地址
* @param password 发送邮件的密码
*/
public SimpleMailSender(
final String username,
final String password) {
// 通过邮箱地址解析出smtp服务器,对大多数邮箱都管用
final String smtpHostName =
"smtp." + username.split(
"@")[1];
init(username, password, smtpHostName);
}
/**
* 初始化
* @param username 发送邮件的用户名(地址)
* @param password 密码
* @param smtpHostName SMTP主机地址
*/
private
void init(String username, String password, String smtpHostName) {
// 初始化props
props.put(
"mail.smtp.auth",
"true");
props.put(
"mail.smtp.host", smtpHostName);
// 验证
authenticator =
new MailAuthenticator(username, password);
// 创建session
session = Session.getInstance(props, authenticator);
}
/**
* 发送邮件
* @param recipient收件人邮箱地址
* @param subject邮件主题
* @param content邮件内容
* @throws AddressException
* @throws MessagingException
*/
public
void send(String recipient, String subject, String content)
throws AddressException, MessagingException {
// 创建mime类型邮件
final MimeMessage message =
new MimeMessage(session);
// 设置发信人
message.setFrom(
new InternetAddress(authenticator.getUsername()));
// 设置收件人
message.setRecipient(RecipientType.TO,
new InternetAddress(recipient));
// 设置主题
message.setSubject(subject);
// 设置邮件内容
Multipart mp =
new MimeMultipart(
"related");
MimeBodyPart mbp =
new MimeBodyPart();
mbp.setContent(content.toString(),
"text/html;charset=utf-8");
mp.addBodyPart(mbp);
message.setContent(mp);
// 设置邮件内容
// message.setContent(content.toString(), "text/html;charset=utf-8");
// 发送
Transport.send(message);
}
/**
* 群发邮件
* @param recipients收件人们
* @param subject 主题
* @param content 内容
* @throws AddressException
* @throws MessagingException
*/
public
void send(List<String> recipients, String subject, String content)
throws AddressException, MessagingException {
// 创建mime类型邮件
final MimeMessage message =
new MimeMessage(session);
// 设置发信人
message.setFrom(
new InternetAddress(authenticator.getUsername()));
// 设置收件人们
final
int num = recipients.size();
InternetAddress[] addresses =
new InternetAddress[num];
for (
int i = 0; i < num; i++) {
addresses[i] =
new InternetAddress(recipients.get(i));
}
message.setRecipients(RecipientType.TO, addresses);
// 设置主题
message.setSubject(subject);
// 设置邮件内容
message.setContent(content.toString(),
"text/html;charset=utf-8");
// 发送
Transport.send(message);
}
/**
* 发送邮件
* @param recipient收件人邮箱地址
* @param mail邮件对象
* @throws AddressException
* @throws MessagingException
*
*/
public
void send(String recipient, SimpleMail mail)
throws AddressException, MessagingException {
send(recipient, mail.getSubject(), mail.getContent());
}
/**
* 群发邮件
* @param recipients 收件人们
* @param mail 邮件对 象
* @throws AddressException
* @throws MessagingException
*/
public
void send(List<String> recipients, SimpleMail mail)
throws AddressException, MessagingException {
send(recipients, mail.getSubject(), mail.getContent());
}
}
三、
建立
SimpleMail类,这只是个普通邮件类,主要用来封装所要发送的邮件信息。
package com.company.simplemail;
public
class SimpleMail {
//邮件中的主题
private String subject;
//邮件的内容(正文)
private String content;
//可根据需要增加其他邮件元素
public
void setSubject(String subject) {
this.subject = subject;
}
public
void setContent(String content) {
this.content = content;
}
public String getSubject() {
return subject;
}
public String getContent() {
return content;
}
}
四、
建立ReadHtmlFile类,此类用来读取网页文件(当然也能读取普通文件),将文件转换成String用来发送
package com.company.util;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpException;
import org.apache.commons.httpclient.methods.GetMethod;
public
class ReadHtmlFile {
public
static HttpClient client =
new HttpClient();
//读取普通文件
public
static String readFile(String filename) {
File file =
new File(filename);
Reader reader =
null;
StringBuffer stb =
new StringBuffer();
int charread = 0;
char[] temps =
new
char[100];
try {
reader =
new InputStreamReader(
new FileInputStream(file));
while ((charread = reader.read(temps)) != -1) {
if (charread == temps.length) {
stb.append(temps);
temps =
new
char[100];
charread = 0;
}
}
stb.append(temps);
reader.close();
}
catch (Exception e) {
e.printStackTrace();
}
String str = stb.toString();
return str;
}
/**
*
* 所要发送的网页中,不要使用外联样式,脚本等,
* 因为各大邮箱后台的过滤算法会过滤掉css,script等
* 样式用标签style属性写
* 图片、链接必须使用绝对地址 (http://.....) 形式才能接收显示
* */
public
static String getSource(String url) {
GetMethod method =
new GetMethod(url);
try {
client.executeMethod(method);
}
catch (HttpException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
InputStream in =
null;
try {
in = method.getResponseBodyAsStream();
}
catch (IOException e1) {
// e1.printStackTrace();
}
in =
new BufferedInputStream(in);
Reader r =
new InputStreamReader(in);
int c;
StringBuffer buffer =
new StringBuffer();
try {
while ((c = r.read()) != -1)
buffer.append((
char) c);
}
catch (IOException e) {
e.printStackTrace();
}
try {
in.close();
}
catch (IOException e) {
e.printStackTrace();
}
method.releaseConnection();
return buffer.toString();
}
}
五、建立测试类,可以发送邮件了!!!
package com.company.simplemail;
import java.util.ArrayList;
import java.util.List;
import org.junit.Test;
import com.company.util.ReadHtmlFile;
public
class MailTest {
/**
* 单发
* */
@Test
public
void testSingleSend(){
SimpleMail sm=
new SimpleMail();
sm.setSubject(
"第一封邮件");
String str = ReadHtmlFile.getSource(
"http://www.baidu.com");
//String str = ReadHtmlFile.readFile("这里填写你需要发送的本地文件路径");
System.out.println(str);
sm.setContent(str);
SimpleMailSender sms=new SimpleMailSender(""这里填写你的发件箱","这里填写你的发件箱密码");
try {
sms.send("这里需要填写接收邮件的邮箱", sm);
System.out.println("执行完成!!");
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 群发
*
* */
@Test
public void testMassSend(){
SimpleMail sm=new SimpleMail();
sm.setSubject("第一封邮件");
String str = ReadHtmlFile.getSource("http://www.baidu.com");
//String str = ReadHtmlFile.readFile("这里填写需要发送的本地文件路径");
System.out.println(str);
sm.setContent(str);
SimpleMailSender sms=new SimpleMailSender("这里填写你的发件箱","这里填写你的发件箱密码");
List<String> recipients=new ArrayList<String>();
recipients.add("这里需要填写接收邮件的邮箱");
recipients.add("这里需要填写接收邮件的邮箱");
recipients.add("这里需要填写接收邮件的邮箱");
recipients.add("这里需要填写接收邮件的邮箱");
try {
sms.send(recipients, sm);
System.out.println("执行完成!!");
} catch (Exception e) {
e.printStackTrace();
}
}
}
最后再次强调:1,所要发送的网页中,不要使用外联样式,脚本等,因为各大邮箱后台的过滤算法会过滤掉css,script等。
2,样式用标签style属性写
3, 图片、链接必须使用绝对地址 (http://.....) 形式才能接收显示
4,一般用于发送的网页文件都是按上面说的要求,自己另外制作的,专门用于邮件发送的网页。在互联网上抓取的网页发送后,一般都不能在收件箱中完美的显示