Spring对邮件发送支持的很好，我们只要配置好邮件发送器，写好邮件发送具体操作类的方法，那么实现就不是很难的事，不过这个过程中经常会出现这样或那样的错误，所以待讲完本篇后我会总体总结下spring邮件发送容易发生的错误及解决办法

关于邮件发送，不外乎有这么几种情况，一种是纯文本的发送，一种是HTML形式的发送，一种就是发送时带有附件，一种就是发送时采取的事群发，针对这几个我将一一来讲下，我的代码中将第一中归为一大类，后面三种归为一代类，所以将会出现两种配置文件

第一大类邮件发送【纯文本发送】

必须包：spring.jar,common-logging.jar,mail.jar,servlet.jar，common-collection.jar

首先我们来看spring配置文件applicationContext.xml

<?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:aop="http://www.springframework.org/schema/aop"	xmlns:tx="http://www.springframework.org/schema/tx"	xsi:schemaLocation="			http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd			http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd			http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">    <!--定义邮件发送器，配置好发送者详细信息-->	<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">		<property name="host" value="http://www.mamicode.com/smtp.163.com" />		<property name="port" value="http://www.mamicode.com/25" />		<property name="username" value="http://www.mamicode.com/emailusername" />		<property name="password" value="http://www.mamicode.com/emailpassword" />		<property name="defaultEncoding" value="http://www.mamicode.com/utf-8" />		<property name="javaMailProperties">			<props>				<prop key="mail.smtp.auth">true</prop>			</props>		</property>	</bean>	<bean id="emailService" class="com.javacrazyer.comon.SendOrderConfirmationEmailAdvice">		<property name="mailSender" ref="mailSender" />	</bean></beans>

用到的实体类Order.java

package com.javacrazyer.comon;import java.io.Serializable;public class Order implements Serializable {	/* Private Fields */	private int orderId;	private String username;	private String useremail;	public int getOrderId() {		return orderId;	}	public void setOrderId(int orderId) {		this.orderId = orderId;	}	public String getUsername() {		return username;	}	public void setUsername(String username) {		this.username = username;	}	public String getUseremail() {		return useremail;	}	public void setUseremail(String useremail) {		this.useremail = useremail;	}}

 邮件发送类的接口类MailService.java

package com.javacrazyer.comon;/** * 使用Spring发送邮件 *  */public interface MailService {			void sendOrderMail(Order order);}

具体实现的邮件发送类SendOrderConfirmationEmailAdvice.java

package com.javacrazyer.comon;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import org.springframework.mail.MailSender;import org.springframework.mail.SimpleMailMessage;public class SendOrderConfirmationEmailAdvice implements MailService{	private String from="emailusername@163.com"; //发送人邮箱地址,必须与spring配置文件中的邮箱地址一样	private String registeTemplateName = "com/javacrazyer/comon/mail_registe.txt";	private MailSender mailSender;	public void setMailSender(MailSender mailSender) {        this.mailSender = mailSender;    }	public void sendOrderMail(Order order) {		//SimpleMialMessage只能用来发送TEXT格式的邮件		SimpleMailMessage mail = new SimpleMailMessage();		mail.setFrom(this.from);		mail.setTo(order.getUseremail());		mail.setSubject("恭喜你成功注册成为SOMEDAY商城的会员!");		mail.setText(loadTemplateContent(registeTemplateName).replaceAll("\\$\\{LOGINNAME\\}", order.getUsername()));		this.mailSender.send(mail);	}		private String loadTemplateContent(String templateName){		StringBuilder sb = new StringBuilder();		BufferedReader br= null;		try{			br = new BufferedReader(					new InputStreamReader(						Thread.currentThread()							  .getContextClassLoader()							  .getResourceAsStream(templateName), "UTF-8"));						String lineSeparator = System.getProperty("line.separator");			for(String str = null; (str = br.readLine()) != null;){				sb.append(str);				sb.append(lineSeparator);			}		}catch(IOException e){			e.printStackTrace();		}finally{			if(br != null){				try {					br.close();				} catch (IOException e) {					e.printStackTrace();				}			}		}				return sb.toString();	}}

 用到的mail_registe.txt

亲爱的${LOGINNAME}：您好!恭喜你成为SOMEDAY商城的会员!你的登录用户名为：${LOGINNAME}你的登录口令为：******(隐藏)本站网址：http://www.yoursitename.cn联系邮箱：hr@yoursite.cn

测试发送

package com.javacrazyer.service.test;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.javacrazyer.comon.MailService;import com.javacrazyer.comon.Order;public class UserServiceTest {	@Test	public void test() throws InterruptedException {		ApplicationContext context = new ClassPathXmlApplicationContext(				"applicationContext.xml");		MailService sf = (MailService) context.getBean("emailService");		Order order = new Order();		order.setUsername("cheneywu");		order.setUseremail("xxxxxx@qq.com");		sf.sendOrderMail(order);	}}

 注意查收邮箱中的信息哦

第二大类邮件发送【HTML格式的发送，群发，附件】

  除了上面包外，还需要spring-webmvc.jar,freemarker.jar,为什么需要freemarker呢，因为要发送HTML格式的文件，所以要先写好HTML内容的文件，然后用模板freemarker匹配其中的值，Spring中对freemarker也有很好的支持

 spring配置文件applicatonContext-html.xml

<?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:aop="http://www.springframework.org/schema/aop"	xmlns:tx="http://www.springframework.org/schema/tx"	xsi:schemaLocation="			http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd			http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd			http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">	<bean id="freeMarker"		class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer">		<property name="templateLoaderPath" value="http://www.mamicode.com/classpath:mailTemplate" />		<!--指定模板文件目录-->		<property name="freemarkerSettings"><!-- 设置FreeMarker环境属性-->			<props>				<prop key="template_update_delay">1800</prop><!--刷新模板的周期，单位为秒-->				<prop key="default_encoding">UTF-8</prop><!--模板的编码格式 -->				<prop key="locale">zh_CN</prop><!-- 本地化设置-->			</props>		</property>	</bean>	<!-- 注意:这里的参数(如用户名、密码)都是针对邮件发送者的 -->	<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">		<property name="host" value="http://www.mamicode.com/smtp.163.com" />		<property name="port" value="http://www.mamicode.com/25" />		<property name="username" value="http://www.mamicode.com/emailusername" />		<property name="password" value="http://www.mamicode.com/emailpassword" />		<property name="defaultEncoding" value="http://www.mamicode.com/utf-8" />		<property name="javaMailProperties">			<props>				<prop key="mail.smtp.auth">true</prop>			</props>		</property>	</bean>	<bean id="emailService" class="com.javacrazyer.comon.EmailService">		<property name="mailSender" ref="mailSender"></property>		<property name="freeMarkerConfigurer" ref="freeMarker"></property>	</bean></beans>    

 模板文件目mailTemplate下的模板文件registe.ftl 【这个文件无名字、后缀无所谓，只要内容是HTML内容即可】

<html>     <head>        <meta http-equiv="content-type" content="text/html;charset=utf8">     </head>     <body>         恭喜您成功注册！您的用户名为：<font color=‘red‘ size=‘30‘>${LOGINNAME}</font>     </body>  </html>  

 具体邮件发送类EmailService.java

package com.javacrazyer.comon;import java.io.File;import java.io.UnsupportedEncodingException;import java.util.HashMap;import java.util.List;import java.util.Map;import javax.mail.Message;import javax.mail.MessagingException;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;import javax.mail.internet.MimeUtility;import org.springframework.mail.MailSender;import org.springframework.mail.javamail.JavaMailSender;import org.springframework.mail.javamail.MimeMessageHelper;import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;import freemarker.template.Template;public class EmailService implements MailService {	private JavaMailSender mailSender;	private FreeMarkerConfigurer freeMarkerConfigurer = null; // FreeMarker的技术类	public void setMailSender(JavaMailSender mailSender) {        this.mailSender = mailSender;    }	public void setFreeMarkerConfigurer(			FreeMarkerConfigurer freeMarkerConfigurer) {		this.freeMarkerConfigurer = freeMarkerConfigurer;	}	/**	 * 发送带模板的单个html格式邮件	 */	public void sendOrderMail(Order order) {		MimeMessage msg = mailSender.createMimeMessage();		// 设置utf-8或GBK编码，否则邮件会有乱码，true表示为multipart邮件		try {			MimeMessageHelper helper = new MimeMessageHelper(msg, true, "utf-8");			helper.setTo(order.getUseremail()); // 邮件接收地址			helper.setFrom("emailusername@163.com"); // 邮件发送地址,这里必须和xml里的邮件地址相同一致			helper.setSubject("你好，恭喜你注册成功"); // 主题			String htmlText;			htmlText = getMailText(order.getUsername());			helper.setText(htmlText, true); // 邮件内容，注意加参数true，表示启用html格式		} catch (Exception e) {			// TODO Auto-generated catch block			e.printStackTrace();		} // 使用模板生成html邮件内容		mailSender.send(msg); // 发送邮件	}	/**	 * 批量发送带附件的html格式邮件，带附件	 */	public void sendBatchEmail(Order order, List<String> address) {				MimeMessage msg = mailSender.createMimeMessage();		try {			MimeMessageHelper helper = new MimeMessageHelper(msg, true, "utf-8");			String toList = getMailList(address);			InternetAddress[] iaToList = new InternetAddress().parse(toList);			msg.setRecipients(Message.RecipientType.TO, iaToList);			helper.setFrom("emailusername@163.com");			helper.setSubject("你好，恭喜你注册成功");			String htmlText = getMailText(order.getUsername());			helper.setText(htmlText, true);			// 添加内嵌文件，第1个参数为cid标识这个文件,第2个参数为资源			helper.addInline("a", new File("E:/11.jpg")); // 附件内容			helper.addInline("b", new File("E:/12.jpg"));			File file = new File("E:/各种框架图介绍.docx");			// 这里的方法调用和插入图片是不同的，使用MimeUtility.encodeWord()来解决附件名称的中文问题			helper.addAttachment(MimeUtility.encodeWord(file.getName()), file);		} catch (MessagingException e) {			// TODO Auto-generated catch block			e.printStackTrace();		} catch (UnsupportedEncodingException e) {			// TODO Auto-generated catch block			e.printStackTrace();		} catch (Exception e) {			// TODO Auto-generated catch block			e.printStackTrace();		}		// 如果主题出现乱码，可以使用该函数，也可以使用下面的函数		// helper.setSubject(MimeUtility.encodeText(String text,String		// charset,String encoding))		// 第2个参数表示字符集，第三个为目标编码格式。		// MimeUtility.encodeWord(String word,String charset,String encoding)		mailSender.send(msg);	}	/**	 * 集合转换字符串	 */	public String getMailList(List<String> to) {		StringBuffer toList = new StringBuffer();		int length = to.size();		if (to != null && length < 2) {			toList.append(to.get(0));		} else {			for (int i = 0; i < length; i++) {				toList.append(to.get(i));				if (i != (length - 1)) {					toList.append(",");				}			}		}		return toList.toString();	}	// 通过模板构造邮件内容，参数content将替换模板文件中的${content}标签。	private String getMailText(String content) throws Exception {		String htmlText = "";		// 通过指定模板名获取FreeMarker模板实例		Template tpl = freeMarkerConfigurer.getConfiguration().getTemplate(				"registe.ftl");		Map map = new HashMap(); // FreeMarker通过Map传递动态数据		map.put("LOGINNAME", content); // 注意动态数据的key和模板标签中指定的属性相匹配		// 解析模板并替换动态数据，最终content将替换模板文件中的${content}标签。		htmlText = FreeMarkerTemplateUtils.processTemplateIntoString(tpl, map);		return htmlText;	}}

  单一发送HTML格式的邮件测试

package com.javacrazyer.service.test;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.javacrazyer.comon.MailService;import com.javacrazyer.comon.Order;public class UserServiceTest {	@Test	public void test() throws InterruptedException {		ApplicationContext context = new ClassPathXmlApplicationContext(				"applicationContext-html.xml");		MailService sf = (MailService) context.getBean("emailService");		Order order = new Order();		order.setUsername("cheneywu");		order.setUseremail("xxxxxx@qq.com");		sf.sendOrderMail(order);	}}

 收到邮件了

群发，带附件的测试

package com.javacrazyer.service.test;import java.util.ArrayList;import java.util.List;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import com.javacrazyer.comon.EmailService;import com.javacrazyer.comon.Order;public class UserServiceTest {	@Test	public void test() throws InterruptedException {		ApplicationContext context = new ClassPathXmlApplicationContext(				"applicationContext-html.xml");		EmailService sf = (EmailService) context.getBean("emailService");		Order order = new Order();		order.setUsername("cheneywu");		List<String> maillist = new ArrayList<String>();		maillist.add("XXXXXX@qq.com");		maillist.add("YYYYYY@qq.com");		sf.sendBatchEmail(order, maillist);	}}

 收到邮件了哦

 看到了没有，这个上边有两个接收人，下边的是附件

Spring温习--邮件发送实现