[英]velocity null point exception
I want to send mail using velocity templates. 我想使用速度模板发送邮件。
My configuration based on Spring 3.1 documentation. 我的配置基于Spring 3.1文档。
I have an xml file with configuration: 我有一个配置的xml文件:
<?xml version="1.0" encoding="UTF-8"?>
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd"> http://www.springframework.org/schema/beans/spring-beans-3.1.xsd“>
<bean id="sendMail" class="com.myclass.app.SendMail">
<property name="mailSender" ref="mailSender"/>
<property name="velocityEngine" ref="velocityEngine"/>
</bean>
<bean id="velocityEngine" class="org.springframework.ui.velocity.VelocityEngineFactoryBean">
<property name="velocityProperties">
<value>
resource.loader=class
class.resource.loader.class=org.apache.velocity.runtime.resource.loader.ClasspathResourceLoader
</value>
</property>
</bean>
Then I have class: 然后我上课:
@Controller
public class SendMail{
private static final Logger logger = Logger.getLogger(SendMail.class);
private JavaMailSender mailSender;
private VelocityEngine velocityEngine;
public void setMailSender(JavaMailSender mailSender) {
this.mailSender = mailSender;
}
public void setVelocityEngine(VelocityEngine velocityEngine) {
this.velocityEngine = velocityEngine;
}
@RequestMapping(value = "/sendEmail", method = RequestMethod.GET)
public @ResponseBody void send(){
sentEmail();
}
private void sentEmail(){
try {
// SimpleMailMessage msg = new SimpleMailMessage(mailMessage);
MimeMessage message = mailSender.createMimeMessage();
MimeMessageHelper helper = new MimeMessageHelper(message,
true, "UTF-8");
helper.setFrom("from@from.com");
helper.setTo("myEmail");
helper.setSubject("title");
Map map = new HashMap();
map.put("user", "Piotr");
map.put("test", "TEST");
String text1 = VelocityEngineUtils.mergeTemplateIntoString(
velocityEngine, "velocity.vm", map );
logger.info(text1);
String text = "test";
helper.setText(text, true);
mailSender.send(message);
} catch (Exception ex) {
System.out.println(ex.getStackTrace());
System.out.println(ex.getMessage());
}
}
}
my vm file is located in "resources" folder. 我的vm文件位于“资源”文件夹中。
And all i receive id "Null point Exception"; 我收到的所有ID都是“ Null point Exception”;
The response doesn't give me nothing more. 回应没有给我更多。
Do you have any ideas, what to do ? 您有什么想法,怎么办?
Your templates can't be in resources, they need to be in the classpath that you can configure in the velocityEngine in your applicationContext.xml : 您的模板不能位于资源中,它们必须位于您可以在applicationContext.xml的velocityEngine中配置的类路径中:
<bean id="mailSender" class="org.springframework.mail.javamail.JavaMailSenderImpl">
<property name="host" value="ADDRESS_OF_YOUR_SMTP_SERVER"/>
<property name="defaultEncoding" value="UTF-8"/>
<property name="port" value="XX_PORT_SERVER"/>
<property name="javaMailProperties">
<props>
<prop key="mail.smtps.auth">false</prop> <!-- depending on your smtp server -->
<prop key="mail.smtp.starttls.enable">false</prop>
</props>
</property>
</bean>
<bean id="velocityEngine" class="org.springframework.ui.velocity.VelocityEngineFactoryBean" p:resourceLoaderPath="classpath:META-INF/velocity" />
Don't forget the namespace xmlns:p="http://www.springframework.org/schema/p" to use the properties of the above example. 不要忘记名称空间xmlns:p =“ http://www.springframework.org/schema/p”来使用上面示例的属性。
In your Java class SendMail, don't forget to add the annotation @Autowired : 在您的Java类SendMail中,不要忘记添加注释@Autowired:
@Autowired
public void setMailSender(JavaMailSender mailSender) {
this.mailSender = mailSender;
}
@Autowired
public void setVelocityEngine(VelocityEngine velocityEngine) {
this.velocityEngine = velocityEngine;
}
and finally, to send your email, use the MimeMessagePreparator: 最后,要发送您的电子邮件,请使用MimeMessagePreparator:
MimeMessagePreparator preparator = new MimeMessagePreparator() {
@Override
public void prepare(MimeMessage mimeMessage) throws Exception {
MimeMessageHelper message = new MimeMessageHelper(mimeMessage);
message.setTo("blabla@test.com");
message.setSubject("Email test");
String text = VelocityEngineUtils.mergeTemplateIntoString(
velocityEngine, template, keywords);
message.setText(text, true);
}
};
//Send email using the autowired mailSender
this.mailSender.send(preparator);
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