做项目用到自动发邮件功能，网上查阅很多没有给出特别详细的说明，需要自己去探索，做了很多弯路。
在此给大家分享一下自己的代码：
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使用时 请将Spring 配置文件里的 用户名、密码、邮箱服务器 还有端口 进行修改如果不是 yeah邮箱。
如果使用maven项目：
Pom.xml
添加的内容
<!-- Spring3 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>3.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>3.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>3.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>3.2.4.RELEASE</version>
</dependency>
<!-- Spring Email -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>3.2.4.RELEASE</version>
</dependency>
<!-- Javamail API -->
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4.4</version>
</dependency>
如果直接导入JAR方式 ，需要引入如下JAR包
ailUtil
package com.bookmarksClouds.util;
import java.io.File;
import javax.annotation.Resource;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;
@Component("simpleMail")
public class EmailUtil
{
private JavaMailSender javaMailSender;
private SimpleMailMessage simpleMailMessage;
/**
*
* @方法名: sendMail
* @参数名：@param subject 邮件主题
* @参数名：@param content 邮件主题内容
* @参数名：@param to 收件人Email地址
* @param isHtml 是否是html格式(发送html时使用utf-8编码)
* @描述语: 发送邮件
* @throws MessagingException 发送发生了异常
*/
public void sendMail(String subject, String content,boolean isHtml, String to) throws MessagingException
{
MimeMessage mimeMessage = javaMailSender.createMimeMessage();
MimeMessageHelper messageHelper =null;
if(isHtml)
{
messageHelper = new MimeMessageHelper(mimeMessage,true,"UTF-8");
}
else
{
messageHelper = new MimeMessageHelper(mimeMessage,true);
}
messageHelper.setFrom(simpleMailMessage.getFrom()); //设置发件人Email
messageHelper.setSubject(subject); //设置邮件主题
if(isHtml)
{
messageHelper.setText(content,true); //设置邮件主题内容(html格式)
}
else
{
messageHelper.setText(content); //设置邮件主题内容
}
messageHelper.setTo(to); //设定收件人Email
javaMailSender.send(mimeMessage);
}
/**
* 发送邮件 （包含附件）
* @param subject 主题
* @param content 内容
* @param fileAttachment 附件文件
* @param isHtml 内容是否是html格式
* @param to 发送的邮箱地址
* @throws MessagingException 发送邮件异常（失败）
*/
public void sendMail(String subject, String content,boolean isHtml, File fileAttachment,String to) throws MessagingException
{
MimeMessage mimeMessage = javaMailSender.createMimeMessage();
MimeMessageHelper messageHelper = new MimeMessageHelper(mimeMessage,true,"UTF-8");
messageHelper.setFrom(simpleMailMessage.getFrom()); //设置发件人Email
messageHelper.setSubject(subject); //设置邮件主题
if(isHtml)
{
messageHelper.setText(content,true); //设置邮件主题内容(html格式)
}
else
{
messageHelper.setText(content); //设置邮件主题内容
}
messageHelper.setTo(to); //设定收件人Email
FileSystemResource file = new FileSystemResource(fileAttachment);
messageHelper.addAttachment(file.getFilename(), file); //添加附件
javaMailSender.send(mimeMessage);
}
/**
* 发送邮件 （包含附件）
* @param subject 主题
* @param content 内容
* @param classPathResource 附件文件(附加在项目内部时候)
* @param isHtml 内容是否是html格式
* @param to 发送的邮箱地址
* @throws MessagingException
*/
public void sendMail(String subject, String content,boolean isHtml, ClassPathResource classPathResource,String to)
throws MessagingException
{
MimeMessage mimeMessage = javaMailSender.createMimeMessage();
/**
* new MimeMessageHelper(mimeMessage,true)之true个人见解：
* 关于true参数,官方文档是这样解释的：
* use the true flag to indicate you need a multipart message
* 翻译过来就是：使用true,以表明你需要多个消息
* 再去翻一下MimeMessageHelper的API,找到这样一句话：
* supporting alternative texts, inline elements and attachments
* 也就是说,如果要支持内联元素和附件就必须给定第二个参数为true
* 否则抛出 java.lang.IllegalStateException 异常
*/
MimeMessageHelper messageHelper = new MimeMessageHelper(mimeMessage,true,"UTF-8");
messageHelper.setFrom(simpleMailMessage.getFrom()); //设置发件人Email
messageHelper.setSubject(subject); //设置邮件主题
if(isHtml)
{
messageHelper.setText(content,true); //设置邮件主题内容(html格式)
}
else
{
messageHelper.setText(content); //设置邮件主题内容
}
messageHelper.setTo(to); //设定收件人Email
/** FileSystemResource file = new FileSystemResource(fileAttachment);
* ClassPathResource：很明显就是类路径资源,我这里的附件是在项目里的,所以需要用ClassPathResource
* 如果是系统文件资源就不能用ClassPathResource,而要用FileSystemResource,例：
*
ClassPathResource file = new ClassPathResource("attachment/Readme.txt");
*/
/**
* MimeMessageHelper的addAttachment方法：
* addAttachment(String attachmentFilename, InputStreamSource inputStreamSource)
* InputStreamSource是一个接口,ClassPathResource和FileSystemResource都实现了这个接口
//发送附件邮件
*/
ClassPathResource file = classPathResource;
messageHelper.addAttachment(file.getFilename(), file); //添加附件
javaMailSender.send(mimeMessage);
}
//Spring 依赖注入
@Resource
public void setSimpleMailMessage(SimpleMailMessage simpleMailMessage) {
this.simpleMailMessage = simpleMailMessage;
}
//Spring 依赖注入
@Resource
public void setJavaMailSender(JavaMailSender javaMailSender) {
this.javaMailSender = javaMailSender;
}
}
Demo
package com.bookmarksClouds.test;
import javax.mail.MessagingException;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.bookmarksClouds.util.EmailUtil;
public class EmailUtilTest
{
private ApplicationContext factory = new ClassPathXmlApplicationContext(
new String[] {"spring/spring-smtp-mail-attachment.xml"});
@Test
public void test()
{
EmailUtil mail = (EmailUtil)factory.getBean("simpleMail");
String html= "<html><head><META http-equiv=Content-Type content='text/html; charset=UTF-8'><title>云书签注册激活</title></head><body>欢迎使用，云书签。<br/><a href='www.baidu.com' >云书签</a><br>点击上面超链接 激活账户信息！</body><html>";
try {
mail.sendMail("云书签注册自动发邮件", html,true, "***@qq.com");
} catch (MessagingException e) {
System.out.println("发送邮件失败！");
//e.printStackTrace();
}
}
}
Spring配置文件
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd">
<context:annotation-config/>
<context:component-scan base-package="com.bookmarksClouds"/>
<bean id ="mailSender" class ="org.springframework.mail.javamail.JavaMailSenderImpl" >
<!-- 服务器 -->
<property name ="host" value ="smtp.163.com" />
<!-- 端口号 -->
<property name ="port" value ="25" />
<!-- 用户名 -->
<property name ="username" value ="邮箱地址" />
<!-- 密码 -->
<property name ="password" value ="邮箱密码" />
<!-- SMTP服务器验证 -->
<property name ="javaMailProperties" >
<props >
<!-- 验证身份 -->
<prop key ="mail.smtp.auth" > true </prop >
</props >
</property >
</bean >
<bean id="simpleMailMessage" class="org.springframework.mail.SimpleMailMessage">
<!-- 发件人email -->
<property name="from" value="发送邮箱地址" />
<!--
收件人email
<property name="to" value="to@yeah.net" />
email主题(标题)
<property name="subject" value="Subject" />
email主题内容
<property name="text">
<value>ContentText</value>
</property>
-->
</bean>
</beans>
////
