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: