未找到 WebApplicationContext：未注册 ContextLoaderListener？在 Spring 4 个 MVC 中

Question

我有典型的应用程序 Spring 和 Hibernate 使用基于注释的配置（Spring 4 MVC+Hibernate 4+MySQL+Maven 集成）。

这是我的 class:

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;

import org.springframework.web.WebApplicationInitializer;
import org.springframework.web.context.support.AnnotationConfigWebApplicationContext;
import org.springframework.web.servlet.DispatcherServlet;

public class AppInitializer implements WebApplicationInitializer {

    public void onStartup(ServletContext container) throws ServletException {

        AnnotationConfigWebApplicationContext ctx = new AnnotationConfigWebApplicationContext();
        ctx.register(AppConfig.class);
        ctx.setServletContext(container);

        ServletRegistration.Dynamic servlet = container.addServlet(
                "dispatcher", new DispatcherServlet(ctx));

        servlet.setLoadOnStartup(1);
        servlet.addMapping("/");
    }

}

上面的内容类似于 web.xml 的内容，因为我们正在使用前端控制器 DispatherServler，分配映射（xml 中的 url-pattern）而不是提供spring配置文件的路径(spring-servlet.xml)，这里我们注册配置Class.

java.lang.IllegalStateException: No WebApplicationContext found: no ContextLoaderListener registered?
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:252)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:956)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

我已将相同的 war 上传到另一个 tomcat 7 并且有效！在我的 tomcat 中，http://localhost:8080/examples/ 等其他应用程序也运行良好。奇怪

Answer 1

当存在 JAR 依赖项问题或缺少依赖项时，我已经看到此错误发生。如果你在 Eclipse 中，有时我会丢失我的 Maven 依赖项。您可以通过在项目中右键单击来检查这一点，转到 Deployment Assembly 并确保 Maven Dependencies 在那里。如果没有单击添加和 select Maven 依赖项。

Answer 2

public class AppInitializer implements WebApplicationInitializer{
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
    AnnotationConfigWebApplicationContext webApplicationContext = null;
    webApplicationContext = new AnnotationConfigWebApplicationContext();
    webApplicationContext.setConfigLocation("//write the package name pointing to configuration classes 
like webApplicationConfig and RootWebApplicationConfig classes//");

    DispatcherServlet dispatcherServlet = null;
    dispatcherServlet = new DispatcherServlet(webApplicationContext);

    ServletRegistration.Dynamic servlet = servletContext.addServlet("dispatcher", dispatcherServlet);
    servlet.addMapping("*.mvc");
    servlet.setLoadOnStartup(2);
}

}

Answer 3

尝试将 ContextLoaderListener 添加到您的 ServletContext，此处：

conteiner.addListener(new ContextLoaderListener(ctx));

Answer 4

我只是解释了如何使用自定义 class 和实现接口来做到这一点。我尽力解决这个问题，我在 spring-mvc 方面只有五个月的经验并且没有在实践中完成这个自定义 spring servlet 映射。希望我的post对你有帮助。

Maven配置：添加任意springmvc版本dependency

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webmvc</artifactId>
    <version>3.2.4</version>
</dependency>

<dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>javax.servlet-api</artifactId>
    <version>3.0.1</version>
</dependency>

自定义初始化器class

public class AppInitializer implements WebApplicationInitializer {
    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        WebApplicationContext context = getContext();
        servletContext.addListener(new ContextLoaderListener(context));
        ServletRegistration.Dynamic dispatcher = servletContext.addServlet("DispatcherServlet", new DispatcherServlet(context));
        dispatcher.setLoadOnStartup(1);
        dispatcher.addMapping("/*");
    }

    private AnnotationConfigWebApplicationContext getContext() {
        AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
        context.setConfigLocation("eu.kielczewski.example.config");
        return context;
    }

配置classes

@Configuration
@ComponentScan(basePackages = "eu.kielczewski.example")
public class AppConfig {
}

未找到 WebApplicationContext：未注册 ContextLoaderListener？在 Spring 4 个 MVC 中

No WebApplicationContext found: no ContextLoaderListener registered? in Spring 4 MVC

spring-mvc

tomcat7