我正在使用 Velocity 模板引擎在我的 Spring boot 应用程序中使用电子邮件模板发送电子邮件实用程序。
当前代码如下所示。
pom.xml：
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity</artifactId>
<version>1.7</version>
</dependency>
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity-tools</artifactId>
<version>2.0</version>
</dependency>
速度引擎 bean 配置：
@Configuration
public class VelocityConfig {
@Bean
public VelocityEngine velocityEngine() {
VelocityEngine ve = new VelocityEngine();
ve.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
ve.setProperty("classpath.resource.loader.class", ClasspathResourceLoader.class.getName());
ve.init();
return ve;
}
}
电子邮件模板放置在
src/main/resources/email-templates/summary-email.vm<!DOCTYPE html>
<head>
<title>Summary</title>
</head>
<body>
<h1>Claims Summary</h1>
</body>
</html>
放置在以下目录中：
src
├── main
│ ├── java
│ │ └── com
│ │ └── packageNameioot
│ │ └── SpringBootApplication.java
│ ├── resources
│ │ ├── email-templates
│ │ │ └── summary-email.vm
│ │ └── application.properties
使用模板发送电子邮件的服务类：
@Slf4j
@Service
@RequiredArgsConstructor
public class EmailSummaryService {
private final EmailConnector connector;
private final VelocityEngine velocityEngine;
public Mono<Void> sendFinanceClaimsRunEmailSummary(FinancePeriodRunEntity periodRunEntity, int successCount, int errorCount) {
EmailDto emailDto = EmailDto.builder()
.recipients(Set.of("[email protected]"))
.subject("Claims summary")
.body(createEmailBody())
.html(true)
.build();
return connector.submitEmailRequest(emailDto);
}
private String createEmailBody() {
VelocityContext context = new VelocityContext();
Template template = velocityEngine.getTemplate("email-templates/summary-email.vm");
StringWriter writer = new StringWriter();
template.merge(context, writer);
return writer.toString();
}
}
但是Velocity无法定位模板，出现以下错误。
ERROR velocity:96 - ResourceManager : unable to find resource 'email-templates/summary-email.vm' in any resource loader.
org.apache.velocity.exception.ResourceNotFoundException: Unable to find resource 'email-templates/summary-email.vm'
属性应该这样设置：
VelocityEngine ve = new VelocityEngine();
ve.setProperty(RuntimeConstants.RESOURCE_LOADER, "classpath");
ve.setProperty("resource.loader.classpath.class",
ClasspathResourceLoader.class.getName());