在Springmvc和Thymeleaf中，获取“无法初始化模板解析器：资源解析器尚未设置”）错误

Question

接下来我会显示一些错误，但首先我会解释它。根据我的一些输出结果，创建ViewResolver，SpringTemplateEngine，TemplateResolver bean没有问题，然后找到主页，查看名字是“home”，这里没有问题。

然后，根据thymeleaf模板，我会得到路径“/WEB-INF/templates/home.html”。但这里错了。出现以下错误

Servlet.service() for servlet [dispatcher] in context with path [/Spittr] threw exception [Request processing failed; nested exception is org.thymeleaf.exceptions.ConfigurationException: Cannot initialize template resolver: a resource resolver has not been set] with root cause 
org.thymeleaf.exceptions.ConfigurationException: Cannot initialize template resolver: a resource resolver has not been set 
    at org.thymeleaf.templateresolver.TemplateResolver.initializeSpecific(TemplateResolver.java:136) 
    at org.thymeleaf.templateresolver.AbstractTemplateResolver.initialize(AbstractTemplateResolver.java:106) 
    at org.thymeleaf.Configuration.initialize(Configuration.java:200) 
    at org.thymeleaf.TemplateEngine.initialize(TemplateEngine.java:831) 
    at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1122) 
    at org.thymeleaf.TemplateEngine.process(TemplateEngine.java:1095) 
    at org.thymeleaf.spring3.view.ThymeleafView.renderFragment(ThymeleafView.java:259) 
    at org.thymeleaf.spring3.view.ThymeleafView.render(ThymeleafView.java:179) 
    at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1244) 
    at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1027) 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:971) 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:893) 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) 
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) 
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) 
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1100) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687) 
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2508) 
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2497) 

at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
at java.lang.Thread.run(Unknown Source) 

我不知道这是什么意思，并检查了很多，但不知道如何解决。我会表现出一定的bean：

@Bean 
public ViewResolver viewResolver(SpringTemplateEngine templateEngine){ 
    ThymeleafViewResolver viewResolver = new ThymeleafViewResolver(); 
    viewResolver.setTemplateEngine(templateEngine); 
    System.out.println("create:viewResolver"); 
    return viewResolver; 
} 

@Bean 
public SpringTemplateEngine templateEngine(TemplateResolver templateResolver){ 
    SpringTemplateEngine templateEngine = new SpringTemplateEngine(); 
    templateEngine.setTemplateResolver(templateResolver); 
    System.out.println("create:templateEngine"); 
    return templateEngine; 
} 

@Bean 
public TemplateResolver templateResolver(){ 
    TemplateResolver templateResolver = new TemplateResolver(); 
    templateResolver.setPrefix("/WEB-INF/templates/"); 
    templateResolver.setSuffix(".html"); 
    templateResolver.setTemplateMode("HTML5"); 
    System.out.println("create:templateResolver"); 
    return templateResolver; 
} 

以下是我的控制器

@RequestMapping("/") 
public class HomeController { 
    @RequestMapping(method=GET) 
    public String home(){ 
     System.out.println("control:home"); 
     return "home";  //view name：home 
    } 
}} 

请帮我看一下上述问题。

Answer 1

根据您提供的错误，templateEngine上没有设置任何解析器。千万不要错过在templateResolver作为参数，但只是Bean方法中创建新实例象下面这样：

@Bean 
public ViewResolver viewResolver(){ 
    ThymeleafViewResolver viewResolver = new ThymeleafViewResolver(); 
    viewResolver.setTemplateEngine(templateEngine()); 
    System.out.println("create:viewResolver"); 
    return viewResolver; 
} 

@Bean 
public SpringTemplateEngine templateEngine(){ 
    SpringTemplateEngine templateEngine = new SpringTemplateEngine(); 
    templateEngine.setTemplateResolver(templateResolver()); 
    System.out.println("create:templateEngine"); 
    return templateEngine; 
} 

@Bean 
public TemplateResolver templateResolver(){ 
    TemplateResolver templateResolver = new ClassLoaderTemplateResolver(); 
    templateResolver.setPrefix("/WEB-INF/templates/"); 
    templateResolver.setSuffix(".html"); 
    templateResolver.setTemplateMode("HTML5"); 
    System.out.println("create:templateResolver"); 
    return templateResolver; 
} 

好运。

Answer 2

您可以更改

@Bean 
public TemplateResolver templateResolver(){ 
    TemplateResolver templateResolver = new TemplateResolver(); // This line 
    templateResolver.setPrefix("/WEB-INF/templates/"); 
    templateResolver.setSuffix(".html"); 
    templateResolver.setTemplateMode("HTML5"); 
    System.out.println("create:templateResolver"); 
    return templateResolver; 
} 

到

@Bean 
public TemplateResolver templateResolver() { 
    TemplateResolver templateResolver = new ServletContextTemplateResolver(); 
    templateResolver.setPrefix("/WEB-INF/templates/"); 
    templateResolver.setSuffix(".html"); 
    templateResolver.setTemplateMode("HTML5"); 
    System.out.println("create:templateResolver"); 
    return templateResolver; 
}