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spring 发送邮件

2015-12-30 19:54 363 查看

转自：http://wang3065.iteye.com/blog/1718381

https://github.com/zhaojingchun/app-mail

Spring mail 发送邮件

博客分类：
spring spring mail

简介： 介绍如何使用Spring mail api 来发送email，用velocityEngine 解析邮件模板，这里会用一个完整的Spring mail 发送邮件的例子来演示它发送email的过程。您会欣赏到 Spring mail 的丰富功能，以及它是如何简化开发任务的.

Spring Mail API

Spring Mail API都在org.springframework.mail及其子包org.springframework.mail.javamail中封装。

JavaMailSenderImpl: 邮件发送器，主要提供了邮件发送接口、透明创建Java Mail的MimeMessage、及邮件发送的配置(如:host/port/username/password...)。

MimeMailMessage、MimeMessageHelper：对MimeMessage进行了封装。Spring还提供了一个回调接口MimeMessagePreparator, 用于准备JavaMail的MIME信件.

上代码，MailUtil类负责发送，MailBean类封装邮件信息。只有这两个类了简单吧
MailUtil.java

Java代码

package com.dr.sm.mail;

import java.io.IOException;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;

import org.apache.log4j.Logger;
import org.apache.velocity.VelocityContext;
import org.apache.velocity.app.VelocityEngine;
import org.apache.velocity.exception.VelocityException;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;

/**
* spring发送mail工具
* @author: haleywang,@created on: 2012-9-20
*/
public class MailUtil {

    Logger log = Logger.getLogger(MailUtil.class);

    private JavaMailSender javaMailSender;
    private VelocityEngine velocityEngine;          //模板解析


    /**
     * @param mailBean
     * @return
     * @throws MessagingException
     */
    public boolean send(MailBean mailBean) throws MessagingException {

        MimeMessage msg = createMimeMessage(mailBean);
        if(msg == null){
            return false;
        }

        this.sendMail(msg, mailBean);

        return true;
    }

    private void sendMail(MimeMessage msg, MailBean mailBean){
                javaMailSender.send(msg);
                log.info("$$$ Send mail Subject:" +  mailBean.getSubject()
                        + ", TO:" + arrayToStr(mailBean.getToEmails()) );

    }

    /*
     * 记日记用的
     */
    private String arrayToStr(String[] array){
        if(array == null || array.length == 0){
            return null;
        }
        StringBuffer sb = new StringBuffer();
        for(String str : array){
            sb.append(str+" , ") ;
        }
        return sb.toString();
    }

    /*
     * 根据 mailBean 创建 MimeMessage
     */
    private MimeMessage createMimeMessage(MailBean mailBean) throws MessagingException {
        if (!checkMailBean(mailBean)) {
            return null;
        }
        String text = getMessage(mailBean);
        if(text == null){
            log.warn("@@@ warn mail text is null (Thread name="
                    + Thread.currentThread().getName() + ") @@@ " +  mailBean.getSubject());
            return null;
        }
        MimeMessage msg = javaMailSender.createMimeMessage();
        MimeMessageHelper messageHelper = new MimeMessageHelper(msg, true, "UTF-8");
        //messageHelper.setFrom(mailBean.getFrom());
        try {
            messageHelper.setFrom(mailBean.getFrom(), mailBean.getFromName());
        } catch (UnsupportedEncodingException e) {
            log.error(e);

        }
        messageHelper.setSubject(mailBean.getSubject());
        messageHelper.setTo(mailBean.getToEmails());
        messageHelper.setText(text, true); // html: true

        return msg;
    }

    /*
     * 模板解析
     * @param mailBean
     * @return
     */
    private String getMessage(MailBean mailBean) {
        StringWriter writer = null;
        try {

            writer = new StringWriter();
            VelocityContext context = new VelocityContext(mailBean.getData());

            velocityEngine.evaluate(context, writer, "", mailBean.getTemplate());

            return writer.toString();
        } catch (VelocityException e) {
            log.error(" VelocityException : " + mailBean.getSubject() + "\n" + e);
        } catch (IOException e) {
            log.error(" IOException : " + mailBean.getSubject() + "\n" + e);
        } finally {
            if (writer != null) {
                try {
                    writer.close();
                } catch (IOException e) {
                    log.error("###StringWriter close error ... ");
                }
            }
        }
        return null;
    }

    /*
     * check 邮件
     */
    private boolean checkMailBean(MailBean mailBean){
        if (mailBean == null) {
            log.warn("@@@ warn mailBean is null (Thread name="
                    + Thread.currentThread().getName() + ") ");
            return false;
        }
        if (mailBean.getSubject() == null) {
            log.warn("@@@ warn mailBean.getSubject() is null (Thread name="
                    + Thread.currentThread().getName() + ") ");
            return false;
        }
        if (mailBean.getToEmails() == null) {
            log.warn("@@@ warn mailBean.getToEmails() is null (Thread name="
                    + Thread.currentThread().getName() + ") ");
            return false;
        }
        if (mailBean.getTemplate() == null) {
            log.warn("@@@ warn mailBean.getTemplate() is null (Thread name="
                    + Thread.currentThread().getName() + ") ");
            return false;
        }
        return true;
    }


    /*===================== setter & getter =======================*/
    public void setJavaMailSender(JavaMailSender javaMailSender) {
        this.javaMailSender = javaMailSender;
    }

    public void setVelocityEngine(VelocityEngine velocityEngine) {
        this.velocityEngine = velocityEngine;
    }

}

MailBean

Java代码

package com.dr.sm.mail;

import java.io.Serializable;
import java.util.Map;


public class MailBean implements Serializable {

    private String from;
    private String fromName;
    private String[] toEmails;

    private String subject;

    private Map data ;          //邮件数据
    private String template;    //邮件模板


    //省略setter&getter方法

}

接着就是配置文件了，applicationContext.xml，applicationContext-mail.xml
applicationContext.xml

Xml代码

<?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:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
                        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
                        http://www.springframework.org/schema/aop
                        http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
                        http://www.springframework.org/schema/tx
                        http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
                        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
                        ">

    
    <bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
        <property name="host" value="${mail.host}" />
        <property name="username" value="${mail.username}" />
        <property name="password" value="${mail.password}" />
        <property name="defaultEncoding" value="UTF-8"></property>
        <property name="javaMailProperties">
            <props>
                <prop key="mail.smtp.auth">${mail.smtp.auth}</prop>
                <prop key="mail.smtp.timeout">${mail.smtp.timeout}</prop>
            </props>
        </property>
    </bean>



    


    <bean id="velocityEngine"
        class="org.springframework.ui.velocity.VelocityEngineFactoryBean">
    </bean>

    <bean id="mailUtil" class="com.dr.sm.mail.MailUtil">
        <property name="javaMailSender" ref="mailSender"></property>
        <property name="velocityEngine" ref="velocityEngine"></property>
    </bean>


</beans>

mail.properties

Java代码

mail.from=wzqdemo@163.com
mail.host=smtp.163.com
mail.password=********
mail.smtp.auth=true
mail.smtp.timeout=25000
mail.username=wzqdemo

#mail.from=wzqdemo@163.com
#mail.host=smtp.gmail.com
#mail.password=********
#mail.smtp.auth=true
#mail.smtp.timeout=25000
#mail.username=wzqdemo@gmail.com

jar包：

Java代码

activation.jar
commons-collections-3.2.jar
commons-lang-2.3.jar
commons-logging-1.1.1.jar
junit-4.10.jar
log4j-1.2.15.jar
mail.jar
spring-asm-3.0.6.RELEASE.jar
spring-beans-3.0.6.RELEASE.jar
spring-context-3.0.6.RELEASE.jar
spring-context-support-3.0.6.RELEASE.jar
spring-context.jar
spring-core-3.0.6.RELEASE.jar
spring-expression-3.0.6.RELEASE.jar
spring-jdbc-3.0.6.RELEASE.jar
spring-test-3.0.6.RELEASE.jar
spring-tx-3.0.6.RELEASE.jar
spring-xml-1.5.10.jar
velocity-1.6.4.jar

ok，终于可以开始测试咯！

Java代码

package com.dr.sm.mail;

import java.util.HashMap;
import java.util.Map;

import javax.annotation.Resource;
import javax.mail.MessagingException;

import org.junit.Test;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;


@ContextConfiguration("classpath:applicationContext.xml")
public class MailServiceTest extends AbstractJUnit4SpringContextTests {

    @Resource
    private MailUtil mailUtil;

    @Test
    public void testSendMail() {

        //创建邮件
        MailBean mailBean = new MailBean();
        mailBean.setFrom("wzqdemo@163.com");
        mailBean.setSubject("hello world");
        mailBean.setToEmails(new String[]{"wzqdemo@gmail.com"});
        mailBean.setTemplate("hello ${userName} !<a href='www.baidu.com' >baidu</a>");
        Map map = new HashMap();
        map.put("userName", "Haley Wang");
        mailBean.setData(map);

        //发送邮件
        try {
            mailUtil.send(mailBean);
        } catch (MessagingException e) {
            e.printStackTrace();
        }

    }
}

至此完成咯，可以下载附件，修改mail.properties文件就可以运行了。

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