发送邮件的工具类

如下：

package com.thinkgem.jeesite.common.utils;

import freemarker.template.Configuration;
import freemarker.template.Template;
import org.apache.commons.mail.HtmlEmail;
import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;

import java.io.File;
import java.util.HashMap;
import java.util.Locale;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 发送电子邮件
 */
public class SendMailUtil {

    private static final String fromName = "管理员";
    private static final String charSet = "utf-8";
    // TODO 邮箱和密码要改，如果邮箱不是下面列出的域名的还需要手动加域名和端口
    private static final String from = "xxx@qq.com";//发件人
    private static final String username = "xxx@qq.com";//发件人账户名
    private static final String password = "xxx";//发件人密码

    private static Map<String, String> hostMap = new HashMap<String, String>();
    static {
        // 126
        hostMap.put("smtp.126", "smtp.126.com");
        // qq
        hostMap.put("smtp.qq", "smtp.qq.com");

        // 163
        hostMap.put("smtp.163", "smtp.163.com");

        // sina
        hostMap.put("smtp.sina", "smtp.sina.com.cn");

        // tom
        hostMap.put("smtp.tom", "smtp.tom.com");

        // 263
        hostMap.put("smtp.263", "smtp.263.net");

        // yahoo
        hostMap.put("smtp.yahoo", "smtp.mail.yahoo.com");

        // hotmail
        hostMap.put("smtp.hotmail", "smtp.live.com");

        // gmail
        hostMap.put("smtp.gmail", "smtp.gmail.com");
        hostMap.put("smtp.port.gmail", "465");

        hostMap.put("xxx", "smtp.exmail.qq.com");
        hostMap.put("xxx", "465");
    }

    public static String getHost(String email) throws Exception {
        Pattern pattern = Pattern.compile("\w+@(\w+)(\.\w+){1,2}");
        Matcher matcher = pattern.matcher(email);
        String key = "unSupportEmail";
        if (matcher.find()) {
            key = "smtp." + matcher.group(1);
        }
        if (hostMap.containsKey(key)) {
            return hostMap.get(key);
        } else {
            throw new Exception("unSupportEmail");
        }
    }

    public static int getSmtpPort(String email) throws Exception {
        Pattern pattern = Pattern.compile("\w+@(\w+)(\.\w+){1,2}");
        Matcher matcher = pattern.matcher(email);
        String key = "unSupportEmail";
        if (matcher.find()) {
            key = "smtp.port." + matcher.group(1);
        }
        if (hostMap.containsKey(key)) {
            return Integer.parseInt(hostMap.get(key));
        } else {
            return 25;
        }
    }

    /**
     * 发送模板邮件
     * 
     * @param toMailAddr
     *            收信人地址
     * @param subject
     *            email主题
     * @param templatePath
     *            模板地址
     * @param map
     *            模板map
     */
    public static void sendFtlMail(String toMailAddr, String subject,
            String templatePath, Map<String, Object> map) {
        Template template = null;
        Configuration freeMarkerConfig = null;
        HtmlEmail hemail = new HtmlEmail();
        try {
            hemail.setHostName(getHost(from));
            hemail.setSmtpPort(getSmtpPort(from));
            hemail.setCharset(charSet);
            hemail.addTo(toMailAddr);
            hemail.setFrom(from, fromName);
            hemail.setAuthentication(username, password);
            hemail.setSubject(subject);
            freeMarkerConfig = new Configuration();
            freeMarkerConfig.setDirectoryForTemplateLoading(new File(
                    getFilePath()));
            // 获取模板
            template = freeMarkerConfig.getTemplate(getFileName(templatePath),
                    new Locale("Zh_cn"), "UTF-8");
            // 模板内容转换为string
            String htmlText = FreeMarkerTemplateUtils
                    .processTemplateIntoString(template, map);
            System.out.println(htmlText);
            hemail.setMsg(htmlText);
            hemail.send();
            System.out.println("email send true!");
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("email send error!");
        }
    }

    /**
     * 发送普通邮件
     * 
     * @param toMailAddr
     *            收信人地址
     * @param ccList
     *            抄送列表，多个邮件地址用分号分隔
     * @param subject
     *            email主题
     * @param message
     *            发送email信息
     */
    public static void sendCommonMail(String toMailAddr, String ccList, String subject,
            String message) {
        HtmlEmail hemail = new HtmlEmail();
        try {
            hemail.setHostName(getHost(from));
            int port = getSmtpPort(from);
            if(465 == port){
                hemail.setSSLOnConnect(true);
                hemail.setSslSmtpPort("465");
            }else{
                hemail.setSmtpPort(getSmtpPort(from));
            }
            hemail.setCharset(charSet);
            hemail.addTo(toMailAddr);
            if(StringUtils.isNotBlank(ccList)){
                String[] ccLists = ccList.split(";");
                for(String s:ccLists){
                    hemail.addCc(s);
                }
            }
            hemail.setFrom(from, fromName);
            hemail.setAuthentication(username, password);
            hemail.setSubject(subject);
            hemail.setMsg(message);
            hemail.send();
            System.out.println("email send true!");
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("email send error!");
        }

    }

    /**
     * 发送普通邮件
     *
     * @param toMailAddr
     *            收信人地址
     * @param subject
     *            email主题
     * @param message
     *            发送email信息
     */
    public static void sendCommonMail(String toMailAddr, String subject,
                                      String message) {
        sendCommonMail(toMailAddr, "", subject, message);
    }

    public static String getHtmlText(String templatePath,
            Map<String, Object> map) {
        Template template = null;
        String htmlText = "";
        try {
            Configuration freeMarkerConfig = null;
            freeMarkerConfig = new Configuration();
            freeMarkerConfig.setDirectoryForTemplateLoading(new File(
                    getFilePath()));
            // 获取模板
            template = freeMarkerConfig.getTemplate(getFileName(templatePath),
                    new Locale("Zh_cn"), "UTF-8");
            // 模板内容转换为string
            htmlText = FreeMarkerTemplateUtils.processTemplateIntoString(
                    template, map);
            System.out.println(htmlText);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return htmlText;
    }

    private static String getFilePath() {
        String path = getAppPath(SendMailUtil.class);
        path = path + File.separator + "mailtemplate" + File.separator;
        path = path.replace("\", "/");
        System.out.println(path);
        return path;
    }

    private static String getFileName(String path) {
        path = path.replace("\", "/");
        System.out.println(path);
        return path.substring(path.lastIndexOf("/") + 1);
    }

//    @SuppressWarnings("unchecked")
    public static String getAppPath(Class<?> cls) {
        // 检查用户传入的参数是否为空
        if (cls == null)
            throw new java.lang.IllegalArgumentException("参数不能为空！");
        ClassLoader loader = cls.getClassLoader();
        // 获得类的全名，包括包名
        String clsName = cls.getName() + ".class";
        // 获得传入参数所在的包
        Package pack = cls.getPackage();
        String path = "";
        // 如果不是匿名包，将包名转化为路径
        if (pack != null) {
            String packName = pack.getName();
            // 此处简单判定是否是Java基础类库，防止用户传入JDK内置的类库
            if (packName.startsWith("java.") || packName.startsWith("javax."))
                throw new java.lang.IllegalArgumentException("不要传送系统类！");
            // 在类的名称中，去掉包名的部分，获得类的文件名
            clsName = clsName.substring(packName.length() + 1);
            // 判定包名是否是简单包名，如果是，则直接将包名转换为路径，
            if (packName.indexOf(".") < 0)
                path = packName + "/";
            else {// 否则按照包名的组成部分，将包名转换为路径
                int start = 0, end = 0;
                end = packName.indexOf(".");
                while (end != -1) {
                    path = path + packName.substring(start, end) + "/";
                    start = end + 1;
                    end = packName.indexOf(".", start);
                }
                path = path + packName.substring(start) + "/";
            }
        }
        // 调用ClassLoader的getResource方法，传入包含路径信息的类文件名
        java.net.URL url = loader.getResource(path + clsName);
        // 从URL对象中获取路径信息
        String realPath = url.getPath();
        // 去掉路径信息中的协议名"file:"
        int pos = realPath.indexOf("file:");
        if (pos > -1)
            realPath = realPath.substring(pos + 5);
        // 去掉路径信息最后包含类文件信息的部分，得到类所在的路径
        pos = realPath.indexOf(path + clsName);
        realPath = realPath.substring(0, pos - 1);
        // 如果类文件被打包到JAR等文件中时，去掉对应的JAR等打包文件名
        if (realPath.endsWith("!"))
            realPath = realPath.substring(0, realPath.lastIndexOf("/"));
        /*------------------------------------------------------------ 
         ClassLoader的getResource方法使用了utf-8对路径信息进行了编码，当路径 
          中存在中文和空格时，他会对这些字符进行转换，这样，得到的往往不是我们想要 
          的真实路径，在此，调用了URLDecoder的decode方法进行解码，以便得到原始的 
          中文及空格路径 
        -------------------------------------------------------------*/
        try {
            realPath = java.net.URLDecoder.decode(realPath, "utf-8");
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
        System.out.println("realPath----->" + realPath);
        return realPath;
    }

    // private static File getFile(String path){
    // File file =
    // SendMail.class.getClassLoader().getResource("mailtemplate/test.ftl").getFile();
    // return file;
    // }
    //

    public static void main(String[] args) {
        // HtmlEmail hemail = new HtmlEmail();
        // try {
        // hemail.setHostName("smtp.exmail.qq.com");
        // hemail.setCharset("utf-8");
        // hemail.addTo("fly.1206@qq.com");
        // hemail.setFrom("zhoujunfeng@et-bank.com", "周俊峰");
        // hemail.setAuthentication("zhoujunfeng@et-bank.com", "31415926@aa");
        // hemail.setSubject("sendemail test!");
        // hemail.setMsg("<a href="http://www.google.cn">谷歌</a><br/>");
        // hemail.send();
        // System.out.println("email send true!");
        // } catch (Exception e) {
        // e.printStackTrace();
        // System.out.println("email send error!");
        // }
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("subject", "测试标题");
        map.put("content", "测试 内容");
        String templatePath = "mailtemplate/test.ftl";
        sendFtlMail("test@163.com", "sendemail test!", templatePath, map);

        // System.out.println(getFileName("mailtemplate/test.ftl"));
    }

}

调用方法：

SendMailUtil.sendCommonMail("xxx.qq.com", "", "XXX异常", e.getMessage());