Spring 5 - HTTP状态500 -内部服务器错误

jfgube3f  于 2023-01-08  发布在  Spring
关注(0)|答案(1)|浏览(309)

我正在做的网站教程，我用Spring。可悲的是，代码从视频是不是在我的IDE工作。
有pom.xml文件。

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.example</groupId>
  <artifactId>Travel</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <name>Travel</name>
  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>3.8.1</version>
        <configuration>
          <release>17</release>
        </configuration>
      </plugin>
      <plugin>
        <artifactId>maven-war-plugin</artifactId>
        <version>3.2.3</version>
      </plugin>
    </plugins>
  </build>
  
  
  <dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>6.0.3</version>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>4.0.1</version>
    </dependency>
<dependency>
  <groupId>org.thymeleaf</groupId>
  <artifactId>thymeleaf</artifactId>
  <version>3.0.11.RELEASE</version>
</dependency>
    <dependency>
        <groupId>org.thymeleaf</groupId>
        <artifactId>thymeleaf-spring5</artifactId>
        <version>3.1.1.RELEASE</version>
    </dependency>
  </dependencies>

  
  
</project>

还有网络会议。

package main.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.thymeleaf.spring5.SpringTemplateEngine;
import org.thymeleaf.spring5.view.ThymeleafViewResolver;
import org.thymeleaf.templateresolver.ServletContextTemplateResolver;

@Configuration
@EnableWebMvc
@ComponentScan("main")
public class WebConfig implements WebMvcConfigurer {

    @Autowired
    private WebApplicationContext context;
    
    @Bean
    public ServletContextTemplateResolver templateResolver() {
        ServletContextTemplateResolver resolver = new ServletContextTemplateResolver(context.getServletContext());
        resolver.setPrefix("/WEB-INF/view/");
        resolver.setSuffix(".html");
        return resolver;
    }
    
    @Bean
    public SpringTemplateEngine templateEngine() {
        SpringTemplateEngine templateEngine = new SpringTemplateEngine();
        templateEngine.setTemplateResolver(templateResolver());
        return templateEngine;
    }
    
    @Bean
    public ThymeleafViewResolver viewResolver() {
        ThymeleafViewResolver viewResolver = new ThymeleafViewResolver();
        viewResolver.setTemplateEngine(templateEngine());
        return viewResolver;
    }
    
    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }

}

当我尝试将其放在localhost中时，我可以在浏览器中看到错误500，然后这是来自IDE：

sty 07, 2023 7:36:20 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Allocate exception for servlet [dispatcher]
java.lang.Error: Unresolved compilation problems: 
ServletContextTemplateResolver cannot be resolved to a type
ServletContextTemplateResolver cannot be resolved to a type
ServletContextTemplateResolver cannot be resolved to a type
The method getServletContext() from the type WebApplicationContext refers to the missing type ServletContext

at main.config.WebConfig.templateResolver(WebConfig.java:31)
at main.config.WebConfig$$SpringCGLIB$$0.CGLIB$templateResolver$1(<generated>)
at main.config.WebConfig$$SpringCGLIB$$2.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:258)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:331)
at main.config.WebConfig$$SpringCGLIB$$0.templateResolver(<generated>)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:139)
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:653)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:491)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1324)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1161)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:561)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:521)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:326)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:324)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:961)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:915)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:584)
at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:706)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:583)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:537)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:169)
at jakarta.servlet.GenericServlet.init(GenericServlet.java:158)
at jakarta.servlet.http.HttpServlet.init(HttpServlet.java:140)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:995)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:696)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:128)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:119)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:400)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1739)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:833)

所以这句话肯定是错的：

@Bean
    public ServletContextTemplateResolver templateResolver() {
        ServletContextTemplateResolver resolver = new ServletContextTemplateResolver(context.getServletContext());
        resolver.setPrefix("/WEB-INF/view/");
        resolver.setSuffix(".html");
        return resolver;
    }

我试着这样改变它：

@Bean
    public ServletContextTemplateResolver templateResolver() {
        ServletContextTemplateResolver resolver = new ServletContextTemplateResolver((ServletContext) context.getServletContext());
        resolver.setPrefix("/WEB-INF/view/");
        resolver.setSuffix(".html");
        return resolver;
    }

还是一样，500错误。

spring

1条答案

按热度按时间
ubof19bj

ubof19bj1#

正如您在the changelogs中所看到的，Spring在6.0版本中迁移到了Jakarta EE。
在pom.xml中，您使用的是spring-webmvc的6.0.3版本（需要Jakarta EE），但也使用了javax.servlet-api，后者是Java EE的一部分。
基本上有两种选择：

迁移到Jakarta EE

替换

<dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>4.0.1</version>
    </dependency>

与

<dependency>
    <groupId>jakarta.servlet</groupId>
    <artifactId>jakarta.servlet-api</artifactId>
    <version>6.0.0</version>
    <scope>provided</scope>
</dependency>

然后将使用Jakarta Servlet API的6.0.0版本，而不是Java EE Servlet API的4.0.1版本。
或者，您可以使用5.0.0等较旧的版本。
同样，您需要upgrade thymeleaf to 3.1.x as this version supports Spring 6 and Jakarta EE。为此，请将

<dependency>
  <groupId>org.thymeleaf</groupId>
  <artifactId>thymeleaf</artifactId>
  <version>3.0.11.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.thymeleaf</groupId>
    <artifactId>thymeleaf-spring5</artifactId>
    <version>3.1.1.RELEASE</version>
</dependency>

与

<dependency>
  <groupId>org.thymeleaf</groupId>
  <artifactId>thymeleaf</artifactId>
  <version>3.1.1.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.thymeleaf</groupId>
    <artifactId>thymeleaf-spring6</artifactId>
    <version>3.1.1.RELEASE</version>
</dependency>

以便Thymeleaf也能与Spring版本兼容。
除了更新依赖项之外，用these were changed in Spring 3.1之类的东西替换ServletContextTemplateResolver也很重要。
因为它是一个Spring应用程序，所以你可以按照Thymeleaf 3.1教程中的描述来使用SpringResourceTemplateResolver：

@Bean
public SpringResourceTemplateResolver templateResolver(){
    // SpringResourceTemplateResolver automatically integrates with Spring's own
    // resource resolution infrastructure, which is highly recommended.
    SpringResourceTemplateResolver templateResolver = new SpringResourceTemplateResolver();
    templateResolver.setApplicationContext(this.applicationContext);
    templateResolver.setPrefix("/WEB-INF/templates/");
    templateResolver.setSuffix(".html");
    // HTML is the default value, added here for the sake of clarity.
    templateResolver.setTemplateMode(TemplateMode.HTML);
    // Template cache is true by default. Set to false if you want
    // templates to be automatically updated when modified.
    templateResolver.setCacheable(true);
    return templateResolver;
}

或者，您也可以使用WebApplicationTemplateResolver，它可以与Java EE（使用JavaxServletWebApplication）和Jakarta EE（使用JakartaServletWebApplication）一起使用：

@Bean
    public WebApplicationTemplateResolver templateResolver() {
        WebApplicationTemplateResolver resolver = new WebApplicationTemplateResolver(JakartaServletWebApplication.buildApplication(context.getServletContext()));
        resolver.setPrefix("/WEB-INF/view/");
        resolver.setSuffix(".html");
        return resolver;
    }

下坡Spring

另一种可能性是使用6.x之前的SpringWebmvc版本。

<dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>6.0.3</version>
    </dependency>

与

<dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.3.24</version>
    </dependency>

然而，当使用Spring 5.x版本时，您可能会错过Spring 6.x的其他特性（包括将来可能出现的特性）。

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