我在春天是新来的，所以，我遇到了这样的问题：描述：
com.diet4you.LapkoEkaterina.MailComponent中的字段templateEngine需要一个类型为"org.thymelaf.templateEngine"的bean，但找不到。
注入点具有以下注释：-@org.springframework.beans.factory.annotation.Autowired(required=true(
已找到以下候选者，但无法注入：-"ThymelafAutoConfiguration.ThymeleafDefaultConfiguration"中的Bean方法"templateEngine"未加载，因为@ConditionalOnBean(类型：org.thmeleaf.spring5.ISpringTemplateEngine；SearchStrategy：all(找到了"org.thymelaf.spring5.ISpringTemplate Engine"templateEngine类型的Bean-"ThymelafAutoConfiguration.ThymeleafReactiveConfiguration"中的Bean方法"templateEngine"未加载，因为未找到响应式web应用程序类
行动：
考虑重新访问上面的条目，或者在配置中定义类型为"org.thymelaf.TemplateEngine"的bean。
邮件组件：
@Component
public class MailComponent {
@Autowired
MailSender mailSender;
@Autowired
JavaMailSender javaMailSender;
@Autowired
TemplateEngine templateEngine;
public boolean sendSimpleMail(Contact contact) {
SimpleMailMessage mailMessage = new SimpleMailMessage();
mailMessage.setFrom(contact.getEmail());
mailMessage.setSubject(contact.getSubject());
mailMessage.setText(contact.getMessage());
mailMessage.setTo("email@email.com"); // if you use Gmail do not forget to put your personal address
try {
mailSender.send(mailMessage);
return true;
} catch (MailException e) {
System.err.println(e.getMessage());
return false;
}
}
public boolean sendHtmlMail(Contact contact) {
Context context = new Context();
context.setVariable("contact", contact);
final String messageHtml = templateEngine.process("email/contact", context);
MimeMessage mimeMessage = javaMailSender.createMimeMessage();
MimeMessageHelper mailMessage = new MimeMessageHelper(mimeMessage);
try {
mailMessage.setTo("email@email.com"); // if you use Gmail do not forget to put your personal address
mailMessage.setFrom(contact.getEmail());
mailMessage.setSubject(contact.getSubject());
mailMessage.setText(messageHtml, true);
javaMailSender.send(mimeMessage);
return true;
} catch (MessagingException | MailException e) {
System.err.println(e.getMessage());
return false;
}
}
}
邮件配置：
@PropertySource(ignoreResourceNotFound = true, value = "classpath:ValidationMessages.properties")
@Configuration
public class MailConfig {
@Value("${spring.mail.host}")
private String host;
@Value("${spring.mail.port}")
private int port;
@Value("${spring.mail.default-encoding}")
private String encoding;
@Value("${spring.mail.properties.mail.debug}")
private String debug;
/**
* Gmail Config
*/
// @Value("${spring.mail.username}")
// private String username;
// @Value("${spring.mail.password}")
// private String password;
// @Value("${spring.mail.properties.mail.smtp.auth}")
// private String auth;
// @Value("${spring.mail.properties.mail.smtp.starttls.enable}")
// private String starttls;
@Bean
public JavaMailSender javaMailSender() {
JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
mailSender.setDefaultEncoding(encoding);
mailSender.setHost(host);
mailSender.setPort(port);
/**
* Gmail Config
*/
// mailSender.setUsername(username);
// mailSender.setPassword(password);
Properties properties = new Properties();
// properties.put("mail.smtp.auth", auth);
// properties.put("mail.smtp.starttls.enable", starttls);
properties.put("mail.debug", debug);
mailSender.setJavaMailProperties(properties);
return mailSender;
}
}
胸腺配置：
public class ThymeleafConfig extends WebMvcConfigurerAdapter {
@Bean
public ViewResolver viewResolver() {
ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
viewResolver.setCharacterEncoding("UTF-8");
viewResolver.setTemplateEngine( templateEngine());
return viewResolver;
}
@Bean
public ISpringTemplateEngine templateEngine() {
SpringTemplateEngine templateEngine = new SpringTemplateEngine();
templateEngine.setTemplateResolver(templateResolver());
return templateEngine;
}
private ITemplateResolver templateResolver() {
SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver();
templateResolver.setCharacterEncoding("UTF-8");
templateResolver.setCacheable(false);
templateResolver.setPrefix("classpath:/templates/");
templateResolver.setSuffix(".html");
templateResolver.setTemplateMode(TemplateMode.HTML);
return templateResolver;
}
}
我从这个例子中做到了：https://www.youtube.com/watch?v=KoPWOACk6CA
Spring在试图构造KonsultacjaController时抱怨，因为它找不到满足对MailComponent依赖的bean。从你包含的类来看，它可能是两件事之一：
- 您的spring上下文没有TemplateEngine实例。您的MailComponent需要一个，如果上下文没有，它将无法构造MailController(因此也无法构造KonsultacjaController(
或
- Spring组件扫描没有找到您的MailController组件，因此它不存在于上下文中
顺便说一句，JavaMailSender扩展了MailSender，因此不需要将两者都注入MailComponent。
正如@Chris所建议的。
查看application.properties或applications.yml文件。
必须按照下面的示例定义密钥
应用程序属性
spring.mail.default-encoding=UTF-8
application.yml
spring
mail
default-encodig: UTF-8