一，启用smtp

我用的163邮箱。

记得新增授权码

二，pom

<dependency>
      <groupId>javax.mail</groupId>
      <artifactId>mail</artifactId>
    </dependency>

三，application.xml

<!-- 邮件配置 Begin-->
    <bean id="javaMail" class="com.kintech.common.utils.JavaMail" autowire="byType" />
 
    <bean id="sender" class="org.springframework.mail.javamail.JavaMailSenderImpl"
          p:host="smtp.163.com"
          p:port="25"
          p:protocol="smtp"
          p:username="邮箱"
          p:password="授权码">
        <property name="javaMailProperties">
            <props>
                <prop key="mail.smtp.auth">true</prop>
            </props>
        </property>
    </bean>
 
    <bean id="freeMarkerConfigurer"
          class="org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer"
          p:templateLoaderPath="classpath:mailTemplate/">
        <property name="freemarkerSettings">
            <props>
                <prop key="template_update_delay">1800</prop>
                <prop key="default_encoding">UTF-8</prop>
                <prop key="locale">zh_CN</prop>
            </props>
        </property>
    </bean>
 
    <bean id="taskExecutor"
          class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor"
          p:corePoolSize="10" p:maxPoolSize="30" />
    <!-- 邮件配置 End-->

四，java mail 工具类

package com.kintech.common.utils;
 
import java.io.File;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import org.apache.log4j.Logger;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.task.TaskExecutor;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;
import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;
 
import com.kintech.common.utils.log.LogerHelper;
 
import freemarker.template.Template;
 
/**
 * 发送邮件工具类
 * @author helka067
 */
@SuppressWarnings(value={"rawtypes","unchecked"})
public class JavaMail {
    private static Logger logger =  Logger.getLogger(JavaMail.class);
    
    private JavaMailSenderImpl sender;
    private FreeMarkerConfigurer freeMarkerConfigurer;
    private TaskExecutor taskExecutor;// 拥有异步执行能力的任务执行器
 
    public JavaMail(JavaMailSenderImpl sender, FreeMarkerConfigurer freeMarkerConfigurer, TaskExecutor taskExecutor) {
        super();
        this.sender = sender;
        this.freeMarkerConfigurer = freeMarkerConfigurer;
        this.taskExecutor = taskExecutor;
    }
 
    public void sendMail(String[] receiver ,String subject,String content) throws MessagingException {
        MimeMessage msg = sender.createMimeMessage();
        //MimeMessageHelper helper = new MimeMessageHelper(msg,false,"utf-8");
        MimeMessageHelper helper = new MimeMessageHelper(msg,true,"utf-8");
        helper.setFrom(sender.getUsername());
//        String recipients = PropertiesUtil.getEnvField("recipients");//
        helper.setTo(receiver);
        helper.setSubject("Subject:Test");
        helper.setSentDate(DateUtil.getCurDate());
        String htmlText="content test";
        helper.setText(htmlText, true);
        sender.send(msg);
    }
    
//异步发送
public void sendAsyncMail() {
        taskExecutor.execute(new Runnable() {
            public void run() {
                try {
                    sendMail(......);// 异步调用 
                    logger.info("邮件发送成功！");
                } catch (Exception e) {
                    logger.error("邮件发送失败！，异常信息：" + LogerHelper.getPrintStr(e));
                }
            }
        });
    }
 
//演示发送附件
    public void sendTemplateMail() throws MessagingException {
        MimeMessage msg = sender.createMimeMessage();
        //MimeMessageHelper helper = new MimeMessageHelper(msg,false,"utf-8");
        MimeMessageHelper helper = new MimeMessageHelper(msg,true,"utf-8");
        helper.setFrom(sender.getUsername());
        String recipients = PropertiesUtil.getEnvField("recipients");//
        helper.setTo(recipients.split(","));
        helper.setSubject("Subject");
        helper.setSentDate(DateUtil.getCurDate());
        String htmlText = "content";// 使用模板产生HTML 邮件体内容
        helper.setText(htmlText, true);
        // 增加附件  
        File img = new File("/fgdf.jpg");  
        helper.addInline("myImg", img);  
        /*File file = new File("xxx.zip");  
        helper.addAttachment("xxx.zip", file); */ 
        ClassPathResource file2 = new ClassPathResource("log4j\\log4j.properties"); 
        helper.addAttachment("log4j.properties", file2); 
        sender.send(msg);
    }
    
 
}

五，调用

@RequestMapping(value = "test2", method = RequestMethod.POST)
    public String test2(JavaMailRequest request) throws Exception {
        jml.sendMail(request.getReceiver(),request.getSubject(),request.getContent());
        return "ok";
    }

六，结果