本文出自 “java开发笔记” 博客 出处http://gaoqifang.blog.51cto.com/2270113/758306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 MailAuthenticatorextends 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 finaltransient 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 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 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 = newchar[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 recipients=new ArrayList();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