用idea使用maven开发javaMail并测试

github项目地址
项目总体结构：

1.png

** 1. 异常信息类：AccountEmailException.java**

package com.juvenxu.mvnbook.account.email;

public class AccountEmailException
    extends Exception
{
    private static final long serialVersionUID = -4817386460334501672L;

    public AccountEmailException( String message )
    {
        super( message );
    }

    public AccountEmailException( String message, Throwable throwable )
    {
        super( message, throwable );
    }
}

** 2.发送邮件类的接口 **

package com.juvenxu.mvnbook.account.email;

public interface AccountEmailService
{
    void sendMail( String to, String subject, String htmlText )
        throws AccountEmailException;
}

** 3. 发送邮件的接口类AccountEmailServiceImpl.java**

package com.juvenxu.mvnbook.account.email;

import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;

public class AccountEmailServiceImpl
        implements AccountEmailService {
    private JavaMailSender javaMailSender;

    private String systemEmail;

    public void sendMail(String to, String subject, String htmlText)
            throws AccountEmailException {
        try {
            MimeMessage msg = javaMailSender.createMimeMessage();
            MimeMessageHelper msgHelper = new MimeMessageHelper(msg);

            msgHelper.setFrom(systemEmail);
            msgHelper.setTo(to);
            msgHelper.setSubject(subject);
            msgHelper.setText(htmlText, true);

            javaMailSender.send(msg);
        } catch (MessagingException e) {
            throw new AccountEmailException("Faild to send mail.", e);
        }
    }

    public JavaMailSender getJavaMailSender() {
        return javaMailSender;
    }

    public void setJavaMailSender(JavaMailSender javaMailSender) {
        this.javaMailSender = javaMailSender;
    }

    public String getSystemEmail() {
        return systemEmail;
    }

    public void setSystemEmail(String systemEmail) {
        this.systemEmail = systemEmail;
    }
}

** spring的配置文件，配置AccountEmailService的信息，使用了spring的javaMailSender **
account-email.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"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

    <bean id="propertyConfigurer"
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:service.properties" />
    </bean>

    <bean id="javaMailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
        <property name="protocol" value="${email.protocol}" />
        <property name="host" value="${email.host}" />
        <property name="port" value="${email.port}" />
        <property name="username" value="${email.username}" />
        <property name="password" value="${email.password}" />
        <property name="javaMailProperties">
            <props>
                <prop key="mail.${email.protocol}.auth">${email.auth}</prop>
            </props>
        </property>
    </bean>

    <bean id="accountEmailService"
        class="com.juvenxu.mvnbook.account.email.AccountEmailServiceImpl">
        <property name="javaMailSender" ref="javaMailSender" />
        <property name="systemEmail" value="${email.systemEmail}" />
    </bean>
</beans>

service.properties配置文件，配置发送邮件的服务器：用的时候把email.username,email.password，email.systemEmail换成自己的：

email.protocol=smtp
email.host=smtp.163.com
email.port=25
email.username=chenwei182729@163.com
email.password=//这里填邮箱密码
email.auth=true
email.systemEmail=//这里填邮箱名称

** 测试**

package com.juvenxu.mvnbook.account.email;

import static junit.framework.Assert.assertEquals;

import javax.mail.Message;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.icegreen.greenmail.util.GreenMail;
import com.icegreen.greenmail.util.GreenMailUtil;
import com.icegreen.greenmail.util.ServerSetup;

public class AccountEmailServiceTest
{
    private GreenMail greenMail;

    @Before
    public void startMailServer()
        throws Exception
    {
        greenMail = new GreenMail( ServerSetup.SMTP );
        greenMail.setUser( "chenwei182729@163.com", "chen188290wei" );
        greenMail.start();
    }

    @Test
    public void testSendMail()
        throws Exception
    {
        ApplicationContext ctx = new ClassPathXmlApplicationContext( "account-email.xml" );
        AccountEmailService accountEmailService = (AccountEmailService) ctx.getBean( "accountEmailService" );

        String subject = "***同学";
        String htmlText = "<h3>I Love You !!!</h3>";
        accountEmailService.sendMail( "1510347223@qq.com", subject, htmlText );

        greenMail.waitForIncomingEmail( 2000, 1 );

        Message[] msgs = greenMail.getReceivedMessages();
        assertEquals( 0, msgs.length );
        assertEquals( subject, msgs[0].getSubject() );
        assertEquals( htmlText, GreenMailUtil.getBody( msgs[0] ).trim() );
    }

    @After
    public void stopMailServer()
        throws Exception
    {
        greenMail.stop();
    }
}

//运行 mvn test