spring: spittr实例 构建简单的web应用

我的环境是： jdk8, spirng4

之前照者书上说的做了，不得成功，于是网上百度，不得其然。

后来看到一篇文章，甚是所感。https://segmentfault.com/q/1010000007921684/a-1020000007922842

单词拼错了，无地自容……
我的包名是spittr
但是我的自动扫描写的是spitter，

晕，忘了给视图解析器加@Bean了

或者很多注解写成一排了

　　

于是乎鼓捣重来

SpittrWebAppInitializer 

package spittr.config;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

public class SpittrWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer{

	 @Override
	 protected Class<?>[] getRootConfigClasses() {
		 //根容器
		 return new Class<?>[] { RootConfig.class };
	    }

	    @Override
	    protected Class<?>[] getServletConfigClasses() {
	    	//Spring mvc容器
	    	return new Class<?>[] { WebConfig.class };
	    }

	    @Override
	    protected String[] getServletMappings() {
	    	//DispatcherServlet映射,从"/"开始
	    	return new String[] { "/" };
	    }

}

　　RootConfig

package spittr.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

@Configuration
@ComponentScan(
		basePackages = {"spittr"},
        excludeFilters = {
        		@ComponentScan.Filter(type = FilterType.ANNOTATION, value = EnableWebMvc.class)
        		}
		)
public class RootConfig {
}

　　WebConfig

package spittr.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration
@EnableWebMvc
@ComponentScan("spittr.web")
public class WebConfig extends WebMvcConfigurerAdapter{

	@Bean
    public ViewResolver viewResolver() { //配置JSP视图解析器
	InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        //可以在JSP页面中通过${}访问beans
        resolver.setExposeContextBeansAsAttributes(true);
        return resolver;
    }

    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable(); //配置静态文件处理
    }
}

　　

homeController

package spittr.web;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class HomeController {

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

}

　　

目录如下：

运行结果：