模板解析期间发生错误模板：“类路径资源[templates / index.html]”

问题描述

我正在尝试打开html页面，但是每当尝试访问本地主机时，我都会遇到这些错误。

Whitelabel错误页面该应用程序没有针对/ error的显式映射，因此您将其视为后备。

2020年CEST星期二18:24:14 发生意外错误（类型=内部服务器错误，状态= 500）。模板解析期间发生错误（模板：“类路径资源[templates / index.html]”） org.thymeleaf.exceptions.TemplateInputException：模板解析期间发生错误（模板：“类路径资源[templates / index.html]”）在org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parse（AbstractMarkupTemplateParser.java:241）在org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parseStandalone（AbstractMarkupTemplateParser.java:100）在org.thymeleaf.engine.TemplateManager.parseAndProcess（TemplateManager.java:666）在org.thymeleaf.TemplateEngine.process（TemplateEngine.java:1098）在org.thymeleaf.TemplateEngine.process（TemplateEngine.java:1072）在org.thymeleaf.Spring5.view.ThymeleafView.renderFragment（ThymeleafView.java:362）在org.thymeleaf.Spring5.view.ThymeleafView.render（ThymeleafView.java:189）在org.springframework.web.servlet.dispatcherServlet.render（dispatcherServlet.java:1373）在org.springframework.web.servlet.dispatcherServlet.processdispatchResult（dispatcherServlet.java:1118）在org.springframework.web.servlet.dispatcherServlet.dodispatch（dispatcherServlet.java:1057）在org.springframework.web.servlet.dispatcherServlet.doService（dispatcherServlet.java:943）在org.springframework.web.servlet.FrameworkServlet.processRequest（FrameworkServlet.java:1006）在org.springframework.web.servlet.FrameworkServlet.doGet（FrameworkServlet.java:898）在javax.servlet.http.HttpServlet.service（HttpServlet.java:626）在org.springframework.web.servlet.FrameworkServlet.service（FrameworkServlet.java:883）在javax.servlet.http.HttpServlet.service（HttpServlet.java:733）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:231）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）在org.apache.tomcat.websocket.server.WsFilter.doFilter（WsFilter.java:53）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）在org.springframework.web.filter.RequestContextFilter.doFilterInternal（RequestContextFilter.java:100）在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:119）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）在org.springframework.web.filter.FormContentFilter.doFilterInternal（FormContentFilter.java:93）在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:119）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）在org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal（CharacterEncodingFilter.java:201）在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:119）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:202）在org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:96）在org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:541）在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:139）在org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:92）在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:74）在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:343）在org.apache.coyote.http11.Http11Processor.service（Http11Processor.java:373）在org.apache.coyote.AbstractProcessorLight.process（AbstractProcessorLight.java:65）在org.apache.coyote.AbstractProtocol $ ConnectionHandler.process（AbstractProtocol.java:868）在org.apache.tomcat.util.net.NioEndpoint $ SocketProcessor.doRun（NioEndpoint.java:1589）在org.apache.tomcat.util.net.socketProcessorBase.run（SocketProcessorBase.java:49）在java.base / java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1130）在java.base / java.util.concurrent.ThreadPoolExecutor $ Worker.run（ThreadPoolExecutor.java:630）在org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run（TaskThread.java:61）在java.base / java.lang.Thread.run（Thread.java:832）由以下原因引起：org.attoparser.ParseException：执行处理器org.thymeleaf.Spring5.processor.SpringInputGeneralFieldTagProcessor时出错（模板：“ index”-第9行，col 36）在org.attoparser.MarkupParser.parseDocument（MarkupParser.java:393）在org.attoparser.MarkupParser.parse（MarkupParser.java:257）在org.thymeleaf.templateparser.markup.AbstractMarkupTemplateParser.parse（AbstractMarkupTemplateParser.java:230） ...另外48个由以下原因引起：org.thymeleaf.exceptions.TemplateProcessingException：处理器'org.thymeleaf.Spring5.processor.SpringInputGeneralFieldTagProcessor'执行期间发生错误（模板：“ index”-第9行，第36列）在org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess（AbstractAttributeTagProcessor.java:117）在org.thymeleaf.processor.element.AbstractElementTagProcessor.process（AbstractElementTagProcessor.java:95）在org.thymeleaf.util.ProcessorConfigurationUtils $ ElementTagProcessorWrapper.process（ProcessorConfigurationUtils.java:633）在org.thymeleaf.engine.ProcessorTemplateHandler.handleStandaloneElement（ProcessorTemplateHandler.java:918）在org.thymeleaf.engine.TemplateHandlerAdapterMarkupHandler.handleStandaloneElementEnd（TemplateHandlerAdapterMarkupHandler.java:260）在org.thymeleaf.templateparser.markup.InlinedOutputExpressionMarkupHandler $ InlineMarkupAdapterPreProcessorHandler.handleStandaloneElementEnd（InlinedOutputExpressionMarkupHandler.java:256）处在org.thymeleaf.standard.inline.OutputExpressionInlinePreProcessorHandler.handleStandaloneElementEnd（OutputExpressionInlinePreProcessorHandler.java:169）在org.thymeleaf.templateparser.markup.InlinedOutputExpressionMarkupHandler.handleStandaloneElementEnd（InlinedOutputExpressionMarkupHandler.java:104）处在org.attoparser.HtmlElement.handleStandaloneElementEnd（HtmlElement.java:79）在org.attoparser.HtmlMarkupHandler.handleStandaloneElementEnd（HtmlMarkupHandler.java:241）在org.attoparser.MarkupEventProcessorHandler.handleStandaloneElementEnd（MarkupEventProcessorHandler.java:327）在org.attoparser.ParsingElementMarkupUtil.parseStandaloneElement（ParsingElementMarkupUtil.java:96）在org.attoparser.MarkupParser.parseBuffer（MarkupParser.java:706）在org.attoparser.MarkupParser.parseDocument（MarkupParser.java:301） ...另外50 由以下原因引起：org.springframework.beans.NotReadablePropertyException：Bean类[com.example.demo.domain.User]的无效属性'fullName'：Bean属性'fullName'不可读或具有无效的getter方法：返回类型是否为的getter匹配setter的参数类型？在org.springframework.beans.AbstractnestablePropertyAccessor.getPropertyValue（AbstractnestablePropertyAccessor.java:622）在org.springframework.beans.AbstractnestablePropertyAccessor.getPropertyValue（AbstractnestablePropertyAccessor.java:612）在org.springframework.validation.AbstractPropertyBindingResult.getActualFieldValue（AbstractPropertyBindingResult.java:104）在org.springframework.validation.AbstractBindingResult.getFieldValue（AbstractBindingResult.java:228）在org.springframework.web.servlet.support.BindStatus。（BindStatus.java:129）在org.springframework.web.servlet.support.RequestContext.getBindStatus（RequestContext.java:903）在org.thymeleaf.Spring5.context.webmvc.SpringWebMvcThymeleafRequestContext.getBindStatus（SpringWebMvcThymeleafRequestContext.java:227）在org.thymeleaf.Spring5.util.FieldUtils.getBindStatusFromParsedExpression（FieldUtils.java:306）在org.thymeleaf.Spring5.util.FieldUtils.getBindStatus（FieldUtils.java:258）在org.thymeleaf.Spring5.util.FieldUtils.getBindStatus（FieldUtils.java:227）在org.thymeleaf.Spring5.processor.AbstractSpringFieldTagProcessor.doProcess（AbstractSpringFieldTagProcessor.java:174）在org.thymeleaf.processor.element.AbstractAttributeTagProcessor.doProcess（AbstractAttributeTagProcessor.java:74） ...还有63个

我将附加涉及的文件：

家庭控制器：

@Controller
public class HomeController {

    @RequestMapping("/")
    public String home(Model model) {
        model.addAttribute("formData",new User());
        return "index";
    }

    @RequestMapping(value = "/create",method = RequestMethod.POST)
    public String processFormData(User user) {
        return "results";
    }
}

用户域类：

public class User {
    private String fullName;
    private int age;
    private boolean employed;
    private String gender;


    public User() {}

    public User(String full_name,int age,boolean employed,String gender) {
        super();
        this.fullName = full_name;
        this.age = age;
        this.employed = employed;
        this.gender = gender;
    }

    // GETTER AND SETTERS HERE
}

index.html：

<!doctype html>
<html lang="en" xmlns:th="https://www.thymeleaf.org/">
<head>
    <Meta charset="UTF-8" />
    <title>Home page</title>
</head>
<body>
    <form action="/create" method="POST" th:object="${formData}">
        <p>Full name: <input type="text" th:field="${formData.fullName}" /></p>
        <p>Age: <input type="text" th:field="${formData.age}" /></p>
        <p>Employed: <input type="checkBox" th:field="${formData.employed}" th:value="true"/></p>
        <p>
            Gender: <br>
            Male <input type="radio" th:field="${formData.gender}" th:value="Male" />
            Female <input type="radio" th:field="${formData.gender}" th:value="Female" />
        </p>
        <p>
            <input type="submit" value="Submit"/>
            <input type="reset" value="Reset"/>
        </p>
    </form>
</body>
</html>

解决方法

Bean类[com.example.demo.domain.User]的无效属性'fullName'：Bean属性'fullName'不可读或具有无效的getter方法

Thymeleaf只能通过getter访问对象的属性。另外，如果要将对象绑定与Thymeleaf一起使用，则还必须确保具有setter和默认构造函数。

通常，每当您与Thymeleaf一起使用时，为传递给百里香叶的所有对象定义所有的getter，setter和默认构造函数是一个好主意。

您应该将用户属性的可见性更改为公开。大功告成。

来自萨尔瓦多的问候

java java spring spring-boot thymeleaf