Java发邮件 实现步骤+代码

Java发邮件的例子，JavaMail实例代码，邮件发送在Java中不是难点，但很实用，很多程序都是基于网络的，所以邮件的发送已经成为基础功能了。

核心主文件代码如下：

001	package com.pb.mail;

002	import java.util.Properties;

003	import javax.mail.Address;

004	import javax.mail.BodyPart;

005	import javax.mail.Message;

006	import javax.mail.Multipart;

007	import javax.mail.Session;

008	import javax.mail.Transport;

009	import javax.mail.internet.InternetAddress;

010	import javax.mail.internet.MimeBodyPart;

011	import javax.mail.internet.MimeMessage;

012	import javax.mail.internet.MimeMultipart;

013	public class Mail {

014	private MimeMessage mimeMsg;

015	private Session session;

016	private Properties props;

017	private String username;

018	private String password;

019	private Multipart mp;

020	public Mail(String smtp) {

021	setSmtpHost(smtp);

022	createMimeMessage();

023

}

024	public void setSmtpHost(String hostName) {

025	System.out.println("设置系统属性：mail.smtp.host=" + hostName);

026	if (props == null) {

027	props = System.getProperties();

028

}

029	props.put("mail.smtp.host", hostName);

030

}

031	public boolean createMimeMessage() {

032

try {

033	System.out.println("准备获取邮件会话对象！");

034	session = Session.getDefaultInstance(props, null);

035	} catch (Exception e) {

036	System.out.println("获取邮件会话错误！" + e);

037	return false;

038

}

039	System.out.println("准备创建MIME邮件对象！");

040

try {

041	mimeMsg = new MimeMessage(session);

042	mp = new MimeMultipart();

043

044	return true;

045	} catch (Exception e) {

046	System.out.println("创建MIME邮件对象失败！" + e);

047	return false;

048

}

049

}

050

051	/*定义SMTP是否需要验证*/

052	public void setNeedAuth(boolean need) {

053	System.out.println("设置smtp身份认证：mail.smtp.auth = " + need);

054	if (props == null)

055	props = System.getProperties();

056	if (need) {

057	props.put("mail.smtp.auth", "true");

058

} else {

059	props.put("mail.smtp.auth", "false");

060

}

061

}

062	public void setNamePass(String name, String pass) {

063	username = name;

064	password = pass;

065

}

066

067	/*定义邮件主题*/

068	public boolean setSubject(String mailSubject) {

069	System.out.println("定义邮件主题！");

070

try {

071	mimeMsg.setSubject(mailSubject);

072	return true;

073	} catch (Exception e) {

074	System.err.println("定义邮件主题发生错误！");

075	return false;

076

}

077

}

078

079	/*定义邮件正文*/

080	public boolean setBody(String mailBody) {

081

try {

082	BodyPart bp = new MimeBodyPart();

083	bp.setContent("" + mailBody, "text/html;charset=GBK");

084	mp.addBodyPart(bp);

085	return true;

086	} catch (Exception e) {

087	System.err.println("定义邮件正文时发生错误！" + e);

088	return false;

089

}

090

}

091

092

/*设置发信人*/

093	public boolean setFrom(String from) {

094	System.out.println("设置发信人！");

095

try {

096	mimeMsg.setFrom(new InternetAddress(from)); //发信人

097	return true;

098	} catch (Exception e) {

099	return false;

100

}

101

}

102

103

/*定义收信人*/

104	public boolean setTo(String to) {

105	if (to == null)

106	return false;

107	System.out.println("定义收信人！");

108

try {

109	mimeMsg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));

110	return true;

111	} catch (Exception e) {

112	return false;

113

}

114

}

115

116

/*定义抄送人*/

117	public boolean setCopyTo(String copyto) {

118	if (copyto == null)

119	return false;

120

try {

121	mimeMsg.setRecipients(Message.RecipientType.CC, (Address[]) InternetAddress

122	.parse(copyto));

123	return true;

124	} catch (Exception e) {

125	return false;

126

}

127

}

128

129	/*发送邮件模块*/

130	public boolean sendOut() {

131

try {

132	mimeMsg.setContent(mp);

133	mimeMsg.saveChanges();

134	System.out.println("邮件发送中....");

135	Session mailSession = Session.getInstance(props, null);

136	Transport transport = mailSession.getTransport("smtp");

137	transport.connect((String) props.get("mail.smtp.host"), username, password);

138	transport.sendMessage(mimeMsg, mimeMsg

139	.getRecipients(Message.RecipientType.TO));

140	System.out.println("发送成功！");

141	transport.close();

142	return true;

143	} catch (Exception e) {

144	System.err.println("邮件失败！" + e);

145	return false;

146

}

147

}

148

149	/*调用sendOut方法完成发送*/

150	public static boolean sendAndCc(String smtp, String from, String to, String copyto,

151	String subject, String content, String username, String password) {

152	Mail theMail = new Mail(smtp);

153	theMail.setNeedAuth(true); // 验证

154	if (!theMail.setSubject(subject))

155	return false;

156	if (!theMail.setBody(content))

157	return false;

158	if (!theMail.setTo(to))

159	return false;

160	if (!theMail.setCopyTo(copyto))

161	return false;

162	if (!theMail.setFrom(from))

163	return false;

164	theMail.setNamePass(username, password);

165	if (!theMail.sendOut())

166	return false;

167	return true;

168

}

169

}

以下文件代码也必需的：

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01	package com.pb.mail;

02	public class SendMail {

03	public static void main(String[] args) {

04	String smtp = "smtp.126.com";// smtp服务器

05	String from = "[e-mail]";// 邮件显示名称

06	String to = "[e-mail]";// 收件人的邮件地址，必须是真实地址

07	String copyto = "";// 抄送人邮件地址

08	String subject = "测试邮件";// 邮件标题

09	String content = "你好！";// 邮件内容

10	String username = "abcdefg";// 发件人真实的账户名

11	String password = "123456789";// 发件人密码

12	Mail.sendAndCc(smtp, from, to, copyto, subject, content, username, password);

13

}

14

}