Java发送邮件--web.xml配置，Java代码配置

　　前言：我目前总结的使用java发送邮件的方式有两种，分别是在spring框架xml配置文件使用bean标签，另一种方法是把发送功能封装成一个对象，废话不多说上代码， 边看代码边讲解，希望对需要的人能有帮助。

一、使用xml配置文件发送邮件

第一步：新建一个xml文件起名为emailSender.xml (名称是随意的，后面的代码和名称对应上就可以)

emailSender.xml 内容如下

<?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:tx="http://www.springframework.org/schema/tx" 
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:jee="http://www.springframework.org/schema/jee" 
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:lang="http://www.springframework.org/schema/lang"
    xmlns:security="http://www.springframework.org/schema/security"
     xmlns:mvc="http://www.springframework.org/schema/mvc"    
        xsi:schemaLocation="http://www.springframework.org/schema/beans     
       http://www.springframework.org/schema/beans/spring-beans-4.1.xsd    
       http://www.springframework.org/schema/aop     
       http://www.springframework.org/schema/aop/spring-aop-4.1.xsd    
       http://www.springframework.org/schema/tx    
       http://www.springframework.org/schema/tx/spring-tx-4.1.xsd    
       http://www.springframework.org/schema/context    
       http://www.springframework.org/schema/context/spring-context-4.1.xsd    
       http://www.springframework.org/schema/jee    
       http://www.springframework.org/schema/jee/spring-jee-4.1.xsd    
       http://www.springframework.org/schema/lang    
       http://www.springframework.org/schema/lang/spring-lang-4.1.xsd    
       http://www.springframework.org/schema/mvc    
       http://www.springframework.org/schema/mvc/spring-mvc-4.1.xsd    
       http://www.springframework.org/schema/security    
       http://www.springframework.org/schema/security/spring-security-3.2.xsd">    

     <!-- ******************************************************************** -->
    <!-- Spring 3.0 configuration -->
    <!-- ******************************************************************** -->
     <mvc:annotation-driven/>
    
    <!-- Allows for mapping the DispatcherServlet to "/" by forwarding static resource requests to the container's default Servlet -->
    <mvc:default-servlet-handler/>
    
    <!-- 配置邮箱发射器 -->
    
    <bean id="javaMailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
     <property name="host">
          <value>smtp.qq.com</value>
     </property>
     <property name="port">
         <!-- Error using port 465, so use port 587 -->
          <value>587</value>
     </property>
     <property name="javaMailProperties">
            <props>
              <prop key="mail.smtp.auth">true</prop>
              <prop key="mail.smtp.timeout">80000</prop>
              <!-- 
                <prop key="mail.smtp.socketFactory.class">javax.net.ssl.SSLSocketFactory</prop>
                <prop key="mail.smtp.socketFactory.port">465</prop>
              -->
            </props>
        </property>    
     <property name="username">
      <value>这里填写发送邮箱号</value>
     </property>
     <property name="password">
      <value>这里填写密码（qq邮箱填写授权码）</value>
     </property>
    </bean>
</beans>

第二步：写java代码（可以发送html邮件哦，只需要修改一处代码就OK啦！！！）

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

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class SendEmailController {
    
    @RequestMapping(value = "/sendEmail", method = RequestMethod.POST)
    @ResponseBody
    public void sendEmail(){
        try {  
            System.out.println("read to send");
            //引入mailSender.xml配置文件
            ApplicationContext ctx = new ClassPathXmlApplicationContext("mailSender.xml"); 
            //从配置文件中创建java邮件发射器
            JavaMailSender sender = (JavaMailSender)ctx.getBean("javaMailSender");
            //创建发送消息对象
            MimeMessage msg = sender.createMimeMessage();  
            //创建发送消息帮助对象，utf-8编码
            MimeMessageHelper helper = new MimeMessageHelper(msg,true,"utf-8"); 
            //设置发送人邮箱
            helper.setFrom("xxxxxx@qq.com");  
            //设置收件人邮箱
            helper.setTo("xxxxxx@163.com");  
            //设置邮箱主题
            helper.setSubject("测试邮件"); 
            //设置邮箱内容--纯文本格式
            helper.setText("tets this is a spring mvc email");
　　　　　　　//我想发送一封html邮件，把  helper.setText("")  修改成  msg.setContent("邮件内容", "text/html;charset = utf-8");
            System.out.println("Is sending...");
            //发送邮件
            sender.send(msg);  
            System.out.println("email send ok");  
        } catch (MessagingException e) {  
            System.out.println("send fail");  
            e.printStackTrace();  
        } 
    }
}

 二、第二种方法：直接使用java代码配置

package com.ccpit.p4.dispatch.web;

import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMessage.RecipientType;

public class sendMail {
    public static void main(String[] args) throws MessagingException{
        // 创建Properties 类用于记录邮箱的一些属性
        final Properties props = new Properties();
        // 表示SMTP发送邮件，必须进行身份验证
        props.put("mail.smtp.auth", "true");
        //此处填写SMTP服务器
        props.put("mail.smtp.host", "smtp.qq.com");
        //端口号，QQ邮箱给出了两个端口，但是另一个我一直使用不了，所以就给出这一个587
        props.put("mail.smtp.port", "587");
        // 此处填写你的账号
        props.put("mail.user", "xxxxxx@qq.com");
        // 此处的密码就是前面说的16位STMP口令
        props.put("mail.password", "xxxxxx");

        // 构建授权信息，用于进行SMTP进行身份验证
        Authenticator authenticator = new Authenticator() {

            protected PasswordAuthentication getPasswordAuthentication() {
                // 用户名、密码
                String userName = props.getProperty("mail.user");
                String password = props.getProperty("mail.password");
                return new PasswordAuthentication(userName, password);
            }
        };
        // 使用环境属性和授权信息，创建邮件会话
        Session mailSession = Session.getInstance(props, authenticator);
        // 创建邮件消息
        MimeMessage message = new MimeMessage(mailSession);
        // 设置发件人
        InternetAddress form = new InternetAddress(
                props.getProperty("mail.user"));
        try {
            message.setFrom(form);
        } catch (MessagingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        // 设置收件人的邮箱
        InternetAddress to = new InternetAddress("xxxxxx@163.com");
        message.setRecipient(RecipientType.TO, to);

        // 设置邮件标题
        message.setSubject("测试邮件");

        // 设置邮件的内容体
        message.setContent("这是一封测试邮件", "text/html;charset=UTF-8");

        // 最后当然就是发送邮件啦
        Transport.send(message);
    }
}