One of the best ways to send e-mails is with spring and velocity template. With this technique sending an e-mail is as easy as make a jsp.
In this sample I'm integrating the spring & velocity with struts2 and portlets, but could be extrapolated to any other environment.
The recipe consists of:
- applicationContextBeans.xml -> the sprig config file (the glue)
- registrarse.vm -> a velocity template of our e-mail
- EmailService.java & EmailServiceImpl.java -> the classes to apply the data to the template and send the e-mail. These classes will be the same for all the e-mails, so could be in a separate jar.
- RegistrarseAction.java -> the struts2 action
-applicationContextBeans.xml:
<bean id="emaiInformacionlService" class="es.project.miGestion.administracionDatos.service.EmailServiceImpl" scope="prototype">
<property name="velocityEngine" ref="velocityEngine"></property>
<property name="velocityTpl" value="es/project/velocity/solicitudInformacion.vm"></property>
<property name="inlineFiles">
<map>
<entry>
<key>
<value>id001</value>
</key>
<value>classpath:es/project/velocity/logoproject.png</value>
</entry>
</map>
</property>
</bean>
<bean id="emailRegistrarseService" class="es.project.miGestion.administracionDatos.service.EmailServiceImpl" scope="prototype">
<property name="velocityEngine" ref="velocityEngine"></property>
<property name="velocityTpl" value="es/project/velocity/registrarse.vm"></property>
<property name="inlineFiles">
<map>
<entry>
<key>
<value>id001</value>
</key>
<value>classpath:es/project/velocity/logoproject.png</value>
</entry>
</map>
</property>
</bean>
- registrarse.vm:
<div id="logo">
<p align="right"><img src="cid:id001" /></p>
</div>
<div id="header">
<font size="2" style="font-family: Arial; color: rgb(51, 90, 143);">
A la Atención del Servicio de Atención Telefónica
<br><br>
Cliente registrado en el formulario de la web.
#set ($bar = "cliente")
#if (${cliente} == $bar)
Ya es cliente de project y desea que un comercial se encarge de darle de alta en la Web de project:
#else
No es cliente de project y desea que un comercial se encarge de darle de alta en la Web de project:
#end
</font>
</div>
<br>
<div id="content">
<font size="2" style="font-family: Arial; color: rgb(51, 90, 143);">
<table class="width100" border="0" cellspacing="0" cellpadding="0">
<tr>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" width="110">Nombre</td>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" >${nombre} ${apellidos}</td>
</tr>
<tr>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" >DNI</td>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" >${dni}</td>
</tr>
<tr>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" >Dirección:</td>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" >${direccion},${cp} ${poblacion} - ${pais}</td>
</tr>
<tr>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" >Telefono:</td>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" >${telefono}</td>
</tr>
<tr>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" >Movil:</td>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" >${movil}</td>
</tr>
<tr>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" >Email:</td>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" >${mail}</td>
</tr>
#if (${cliente} == $bar)
<tr>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" >Número cuenta:</td>
<td style="font-size: 9pt; font-family: Arial; color: rgb(51, 90, 143);" >${numeroCuenta}</td>
</tr>
#end
</table>
</font>
</div>
<br>
<hr size="2" width="100%" align="left">
<span style="font-size: 7.5pt; font-family: Arial; color: rgb(51, 90, 143);">
.....
</span>
- EmailServiceImpl.java
...
private VelocityEngine velocityEngine;
private JavaMailSender javaMailSender;
private String velocityTpl;
private Map<String,Resource> inlineFiles;
/**
* Creaci�n y env�o de e-mail.
* @param from E-mail de origen
* @param recipients E-mails de destino
* @param subject Asunto del e-mail
* @param params Par�metros para la generaci�n del cuerpo del e-mail
*/
public void sendEmail(String from, String[] recipients, String subject, Map<String,Object> params) {
log.debug("sendEmail inicio");
final String f = from;
final String s = subject;
final Map<String,Object> p = params;
for(final String to : recipients){
MimeMessagePreparator preparator = new MimeMessagePreparator(){
public void prepare(MimeMessage mimeMessage) throws Exception{
MimeMessageHelper helper = new MimeMessageHelper(mimeMessage,true);
helper.setFrom(f);
helper.setTo(to);
helper.setSubject(MimeUtility.encodeText(s, "iso-8859-1", "B"));
Map<String,Object> model = p;
String text = VelocityEngineUtils.mergeTemplateIntoString(velocityEngine,velocityTpl,model);
helper.setText(text, true);
// añadiendo los ficheros "en línea"
if (getInlineFiles() != null) {
for (String key :getInlineFiles().keySet()) {
Resource value = getInlineFiles().get(key);
helper.addInline(key, value);
if (log.isDebugEnabled()) {
log.debug("File '" + value + "' added.");
}
}
}
}
};
javaMailSender.send(preparator);
}
log.debug("sendEmail fin");
}
/**
* Create and setup the mail sender component
* @param mailTO
*/
public void initializeJavaMailSender(MailTO mailTO){
log.debug("initializeJavaMailSender inicio");
//Create and setup the mail sender component
JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
mailSender.setHost(mailTO.getHostMail());
mailSender.setPort(Integer.valueOf(mailTO.getPort()));
mailSender.setUsername(mailTO.getUsername());
mailSender.setPassword(mailTO.getPassword());
//We need this setting for force Javamail to pass the login
boolean mailSmtpAuth = mailTO.getMailSmtpAuth().equals("true");
boolean starttls = mailTO.getStarttls().equals("true");
Properties props = new Properties();
if(mailSmtpAuth){
log.debug("mailSmtpAuth true:"+mailTO.getMailSmtpAuth());
props.setProperty("mail.smtp.auth", mailTO.getMailSmtpAuth());
}
if(starttls){
log.debug("starttls true:" + mailTO.getStarttls());
props.setProperty("mail.smtp.starttls.enable", mailTO.getStarttls());
}
mailSender.setJavaMailProperties(props);
javaMailSender = mailSender;
log.debug("initializeJavaMailSender fin");
}
...
- RegistrarseAction.java
// Enviar los datos por mail
emailRegistrarseService.initializeJavaMailSender(mailTO);
String[] recipients = mailTO.getToMail().split(";");
String[] emailUsuario = mail.split(";");
Map<String, Object> params = new HashMap<String, Object>();
params.put("cliente", cliente);
params.put("nombre", nombre);
params.put("apellidos", apellidos);
params.put("dni", dni);
params.put("direccion", direccion);
params.put("poblacion", poblacion);
params.put("mail", mail);
params.put("telefono", telefono);
params.put("pais", pais);
params.put("cp", cp);
params.put("movil", movil);
params.put("numeroCuenta", numeroCuenta);
emailRegistrarseService.sendEmail(mail, recipients,
mailTO.getSubject(), params);
