‘.’中的字段templateEngine需要一个无法找到的'org.thymeleaf.TemplateEngine‘类型的bean
‘.’中的字段templateEngine需要一个无法找到的'org.thymeleaf.TemplateEngine‘类型的bean
提问于 2022-06-14 12:52:32
因此，我试图从一个晶闸管模板生成一个pdf文件，但在运行我的应用程序时，我得到了这个错误。
***************************
APPLICATION FAILED TO START
***************************
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下面是我的应用程序的样子。一切看起来都是正确的，我不知道我做错了什么
我的配置文件：
@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;
}
}我的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();
}
}我的主要应用程序：
@Bean
CommandLineRunner run(PdfService pdfService) {
return args -> {
System.out.println("creating pdf...");
pdfService.createPDF();
System.out.println("pdf creation complete!");
};
}编辑:我设法克服了这个问题，但现在我遇到了另一个错误：
java.lang.IllegalStateException: Failed to execute CommandLineRunner
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:772) ~[spring-boot-2.6.3.jar:2.6.3]
at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:753) ~[spring-boot-2.6.3.jar:2.6.3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:309) ~[spring-boot-2.6.3.jar:2.6.3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1303) ~[spring-boot-2.6.3.jar:2.6.3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1292) ~[spring-boot-2.6.3.jar:2.6.3]
at com.example.app.AppApplication.main(AppApplication.java:35) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) ~[spring-boot-devtools-2.6.3.jar:2.6.3]
Caused by: org.xhtmlrenderer.util.XRRuntimeException: Can't load the XML resource (using TrAX transformer). org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog.
at org.xhtmlrenderer.resource.XMLResource$XMLResourceBuilder.transform(XMLResource.java:222) ~[flying-saucer-core-9.1.4.jar:na]
at org.xhtmlrenderer.resource.XMLResource$XMLResourceBuilder.createXMLResource(XMLResource.java:181) ~[flying-saucer-core-9.1.4.jar:na]
at org.xhtmlrenderer.resource.XMLResource.load(XMLResource.java:84) ~[flying-saucer-core-9.1.4.jar:na]
at org.xhtmlrenderer.pdf.ITextRenderer.setDocumentFromString(ITextRenderer.java:161) ~[flying-saucer-pdf-itext5-9.1.4.jar:na]
at org.xhtmlrenderer.pdf.ITextRenderer.setDocumentFromString(ITextRenderer.java:156) ~[flying-saucer-pdf-itext5-9.1.4.jar:na]
at com.example.app.service.PdfService.createPDF(PdfService.java:28) ~[classes/:na]
at com.example.app.AppApplication.lambda$run_again$1(AppApplication.java:74) ~[classes/:na]
at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:769) ~[spring-boot-2.6.3.jar:2.6.3]
... 10 common frames omitted
Caused by: javax.xml.transform.TransformerException: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog.
at java.xml/com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:794) ~[na:na]
at java.xml/com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:397) ~[na:na]
at org.xhtmlrenderer.resource.XMLResource$XMLResourceBuilder.transform(XMLResource.java:220) ~[flying-saucer-core-9.1.4.jar:na]
... 17 common frames omitted
Caused by: org.xml.sax.SAXParseException: Content is not allowed in prolog.
at java.xml/com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1251) ~[na:na]
at java.xml/com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transformIdentity(TransformerImpl.java:695) ~[na:na]
at java.xml/com.sun.org.apache.xalan.internal.xsltc.trax.TransformerImpl.transform(TransformerImpl.java:782) ~[na:na]
... 19 common frames omitted回答 2
Stack Overflow用户
发布于 2022-06-14 13:01:48
在configuration类中，您需要创建模板引擎bean并设置您创建的模板解析器：
@Bean
public SpringTemplateEngine templateEngine() {
var templateEngine = new SpringTemplateEngine();
templateEngine.setTemplateResolver(templateResolver());
return templateEngine;
}注意：：TemplateEngine bean不是自动配置的。
Stack Overflow用户
发布于 2022-06-14 13:03:02
TemplateEngine不是自动配置的，因此您需要在配置中添加类似的内容(请记住设置TemplateResolver)。
@Bean
public TemplateEngine templateEngine() {
return new TemplateEngine();
}或者，您也可以将其插入服务中，通过
final TemplateEngine templateEngine = new TemplateEngine();页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/72617317
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