spring web-mvc 4 java配置不工作

Question

我正在尝试在没有xml配置的情况下运行基本的spring-4 web-mvc应用程序。我看过spring文档和示例，但它对我不起作用。我的控制器：

package com.nikolay.exam.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class HomeController {

@RequestMapping(value = "/home", method = RequestMethod.GET)
@ResponseBody
public String home() {
    return "Hello world!";
}
}

package com.nikolay.exam.config;

import org.springframework.context.annotation.Configuration;

@Configuration
    public class AppConfig {
}

package com.nikolay.exam.config;
import com.nikolay.exam.controller.HomeController;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {

@Bean
public HomeController homeController() {
        return new HomeController();
    }
}

package com.nikolay.exam.config;

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

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;
public class WebInitializer implements WebApplicationInitializer {
    @Override
    public void onStartup(ServletContext servletContext) throws ServletException {
        AnnotationConfigWebApplicationContext root = new AnnotationConfigWebApplicationContext();
        root.setConfigLocation("com.nikolay.exam.config");

        servletContext.addListener(new ContextLoaderListener(root));
        ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcher", new DispatcherServlet(root));
        dispatcher.setLoadOnStartup(1);
        dispatcher.addMapping("/*");

    }
}

但当我在tomcat上运行应用程序时,我收到一个错误：

14-feb-2015 11:35:29.825警告[http-nio-8080-exec-1]org.springframework.web.servlet.pagenotfound.nohandler在名为“dispatcher”的DispatcherServlet中未找到URI为[/home/]的HTTP请求的映射14-feb-2015 11:35:32.766信息[localhost-startStop-1]org.apache.catalina.startup.hostconfig.deploydirectory部署web应用程序目录/home/nikolay/apache-tomcat-8.0.9/webapps/manager 14-feb-2015 11:35:32.904信息[localhost-startStop-1]org.apache.catalina.startup.hostconfig.部署目录部署web应用程序目录/home/nikolay/apache-tomcat-8.0.9/webapps/manager已在136毫秒内完成14-feb-2015 11:35:34.888警告[http-nio-8080-exec-3]org.springframework.web.servlet.pageNotfound.nohandler在名为“dispatcher”的DispatcherServlet中找不到URI为[/home/]的HTTP请求的映射

Answer 1

我认为是您注册配置类的方式不正确。

请尝试改用AnnotationConfigWebApplicationContext#寄存器。

AnnotationConfigWebApplicationContext appContext = new AnnotationConfigWebApplicationContext();
appContext.register(WebConfig.class);