我尝试使用Kotlin + IntelliJ学习一些春季基础知识,但我遇到了一些麻烦。 @RequestMapping带注释的方法(带参数)会导致异常,而Java等效工作则完全正常。 Kotlin代码工作正常,但只有没有" processFormTwo"方法(将工作Java代码转换为kotlin也没有帮助)。
以下是代码:
@Controller
class HelloWorldController {
@RequestMapping("/showForm")
fun showForm() = "helloworld-form"
// this one works fine
@RequestMapping("/processForm")
fun processForm() = "helloworld"
//this one doesn't
@RequestMapping("/processFormTwo")
fun processFormTwo(request: HttpServletRequest, model: Model): String {
var theName = request.getParameter("studentName")
theName = theName.toUpperCase()
val result = "Yo! " + theName
model.addAttribute("message", result)
return "helloworld"
}
}
配置:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!-- Step 3: Add support for component scanning -->
<context:component-scan base-package="com.luv2code.springdemo" />
<!-- Step 4: Add support for conversion, formatting and validation support -->
<mvc:annotation-driven/>
<!-- Step 5: Define Spring MVC view resolver -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/view/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
的web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
id="WebApp_ID" version="3.1">
<display-name>spring-mvc-demo</display-name>
<!-- Spring MVC Configs -->
<!-- Step 1: Configure Spring MVC Dispatcher Servlet -->
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring-mvc-demo-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- Step 2: Set up URL mapping for Spring MVC Dispatcher Servlet -->
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
错误日志:
例外
javax.servlet.ServletException:servlet调度程序的Servlet.init() 扔了例外 org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1132) org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process(AbstractProtocol.java:684) org.apache.tomcat.util.net.AprEndpoint $ SocketProcessor.doRun(AprEndpoint.java:2521) org.apache.tomcat.util.net.AprEndpoint $ SocketProcessor.run(AprEndpoint.java:2510) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) java.util.concurrent.ThreadPoolExecutor中的$ Worker.run(ThreadPoolExecutor.java:617) org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run(TaskThread.java:61) java.lang.Thread.run(Thread.java:745)根本原因
org.springframework.beans.factory.BeanCreationException:错误 用名称&#39; helloWorldController创建bean&#39;:无法内省 bean类[com.luv2code.springdemo.mvc.HelloWorldController] for 查找方法元数据:无法找到它依赖的类; 嵌套异常是java.lang.NoClassDefFoundError: 科特林/ TypeCastException org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:269) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1118) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1091) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject(AbstractBeanFactory.java:306) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682) org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553) org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494) org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:171) javax.servlet.GenericServlet.init(GenericServlet.java:158) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1132) org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process(AbstractProtocol.java:684) org.apache.tomcat.util.net.AprEndpoint $ SocketProcessor.doRun(AprEndpoint.java:2521) org.apache.tomcat.util.net.AprEndpoint $ SocketProcessor.run(AprEndpoint.java:2510) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) java.util.concurrent.ThreadPoolExecutor中的$ Worker.run(ThreadPoolExecutor.java:617) org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run(TaskThread.java:61) java.lang.Thread.run(Thread.java:745)根本原因
java.lang.NoClassDefFoundError:kotlin / TypeCastException java.lang.Class.getDeclaredMethods0(本机方法) java.lang.Class.privateGetDeclaredMethods(Class.java:2701) java.lang.Class.getDeclaredMethods(Class.java:1975) org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:613) org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:524) org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:510) org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:247) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1118) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1091) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject(AbstractBeanFactory.java:306) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682) org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553) org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494) org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:171) javax.servlet.GenericServlet.init(GenericServlet.java:158) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1132) org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process(AbstractProtocol.java:684) org.apache.tomcat.util.net.AprEndpoint $ SocketProcessor.doRun(AprEndpoint.java:2521) org.apache.tomcat.util.net.AprEndpoint $ SocketProcessor.run(AprEndpoint.java:2510) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) java.util.concurrent.ThreadPoolExecutor中的$ Worker.run(ThreadPoolExecutor.java:617) org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run(TaskThread.java:61) java.lang.Thread.run(Thread.java:745)根本原因
java.lang.ClassNotFoundException:kotlin.TypeCastException org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1333) org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1167) java.lang.Class.getDeclaredMethods0(本机方法) java.lang.Class.privateGetDeclaredMethods(Class.java:2701) java.lang.Class.getDeclaredMethods(Class.java:1975) org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:613) org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:524) org.springframework.util.ReflectionUtils.doWithMethods(ReflectionUtils.java:510) org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:247) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1118) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1091) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject(AbstractBeanFactory.java:306) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:668) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:634) org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:682) org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:553) org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:494) org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:171) javax.servlet.GenericServlet.init(GenericServlet.java:158) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:620) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:502) org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1132) org.apache.coyote.AbstractProtocol $ AbstractConnectionHandler.process(AbstractProtocol.java:684) org.apache.tomcat.util.net.AprEndpoint $ SocketProcessor.doRun(AprEndpoint.java:2521) org.apache.tomcat.util.net.AprEndpoint $ SocketProcessor.run(AprEndpoint.java:2510) java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) java.util.concurrent.ThreadPoolExecutor中的$ Worker.run(ThreadPoolExecutor.java:617) org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run(TaskThread.java:61) java.lang.Thread.run(Thread.java:745)
答案 0 :(得分:0)
尝试将Controller类和函数标记为打开
有一个gradle插件,用于将所有类标记为打开:
buildscript{
dependencies {
classpath("org.jetbrains.kotlin:kotlin-allopen:$kotlinVersion")
}
}
apply plugin: 'kotlin-spring'