Field templateEngine in '....' required a bean of type 'org.thymeleaf.TemplateEngine&-CodePudding

So i'm trying to generate a pdf file from a thymeleaf template but I get this error when running my app.

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APPLICATION FAILED TO START
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Description:

Field templateEngine in com.example.app.service.PdfService required a bean of type 'org.thymeleaf.TemplateEngine' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'org.thymeleaf.TemplateEngine' in your configuration.


Process finished with exit code 0

HERE IS HOW MY APPLICATION LOOKS LIKE. Everything looks correct and I don't know what i've done wrong

my configuration file :

@Configuration
public class ThymeleafConfig {

    @Bean
    public ClassLoaderTemplateResolver templateResolver() {
        ClassLoaderTemplateResolver templateResolver = new ClassLoaderTemplateResolver();
        templateResolver.setPrefix("templates/");
        templateResolver.setTemplateMode("HTML5");
        templateResolver.setSuffix(".html");
        templateResolver.setTemplateMode("XHTML");
        templateResolver.setCharacterEncoding("UTF-8");
        templateResolver.setOrder(1);
        return templateResolver;
    }
}

my PdfService :

@Service
public class PdfService {

    @Autowired
    private TemplateEngine templateEngine;

    public void createPDF() throws DocumentException, IOException {
        Context context = new Context();
        context.setVariable("name","developper.com");
        String processHtml = templateEngine.process("helloworld",context);
        OutputStream outputStream = new FileOutputStream("message.pdf");
        ITextRenderer renderer = new ITextRenderer();
        renderer.setDocumentFromString(processHtml);
        renderer.layout();
        renderer.createPDF(outputStream,false);
        renderer.finishPDF();
        outputStream.close();
    }
}

my main app :

@Bean
    CommandLineRunner run(PdfService pdfService) {

        return args -> {

            System.out.println("creating pdf...");
            pdfService.createPDF();
            System.out.println("pdf creation complete!");
       
        };
    }

CodePudding user response：

In configuration class, create template engine bean and set template resolver which you have created:

  @Bean
        public SpringTemplateEngine templateEngine() {
            var templateEngine = new SpringTemplateEngine();
            templateEngine.setTemplateResolver(templateResolver());
    
            return templateEngine;
        }

CodePudding user response：

TemplateEngine is not autoconfigured, so you need to add to your configuration something like (remember to set the TemplateResolvers)

@Bean
public TemplateEngine templateEngine() {
  return new TemplateEngine(); 
}

or alternatively, you can just inject it via

final TemplateEngine templateEngine = new TemplateEngine();