基于注解SpringMVC基础

最新推荐文章于 2021-06-29 00:28:54 发布

VarlorC

最新推荐文章于 2021-06-29 00:28:54 发布

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分类专栏： Java 文章标签： SpringMVC

本文链接：https://blog.youkuaiyun.com/jnzisnoone/article/details/81808669

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本文介绍如何使用Java配置方式替代XML配置来搭建Spring MVC环境，并通过示例展示了具体的配置步骤及控制器实现。

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创建AppServletConfig类，取代spring-configs-xml配置文件

@ComponentScan("com.jt")
@EnableWebMvc

public class AppServletConfig extends WebMvcConfigurerAdapter{
   @Override
   public void configureViewResolvers(ViewResolverRegistry registry) {
       // TODO Auto-generated method stub
       registry.jsp("/WEB-INF/page/",".jsp");
   }
}

创建AppWebApplicationInitializer类，继承AbstractAnnotationConfigDispatcherServletInitializer类（也可以实现WebApplicationInitializer接口，具体查看spring framework文档）

public class AppWebApplicationInitializer extends AbstractAnnotationConfigDispatcherServletInitializer{

   @Override
   protected Class<?>[] getRootConfigClasses() {
       // Service,Dao
       System.out.println("getRootConfigClasses()");
       return null;
   }

   @Override
   protected Class<?>[] getServletConfigClasses() {
       System.out.println("getServletConfigClasses()");
       return new Class[] {AppServletConfig.class};
   }

   @Override
   protected String[] getServletMappings() {
       // TODO Auto-generated method stub
       System.out.println("getServletMappings()");
       return new String[] {"*.do"};

   }

}

最后再写Controller层即可

@Controller
@RequestMapping("/")
public class AnnotationHelloController {
   @RequestMapping("doHelloUI") //url
   public ModelAndView doHelloUI(){
       System.out.println("doHelloUI()");
       ModelAndView mv=new ModelAndView();
       mv.setViewName("hello");
       mv.addObject("msg","hello spring mvc");
       return mv;
   }
   @RequestMapping("doSayHello")
   public ModelAndView doSayHello(
           ModelAndView mv){
       mv.setViewName("hello");
       mv.addObject("msg","do say hello");
       return mv;//-->ViewResolver
   }
   @RequestMapping("doSayWelcome")
   public String doSayWelcome(Model m){
       m.addAttribute("msg", "do say welcome");
       return "hello";//view
   }
}

pom.xml文件因为没有web.xml会报错，需要添加

<build>
   <plugins>
       <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-war-plugin</artifactId>
           <version>2.2</version>
           <configuration>
               <failOnMissingWebXml>false</failOnMissingWebXml>
           </configuration>
       </plugin>
   </plugins>
</build>

JavaResource报错需要在pom.xml添加

<plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-compiler-plugin</artifactId>
           <version>3.1</version>
           <configuration>
               <source>1.8</source>
               <target>1.8</target>
           </configuration>
</plugin>