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<properties>
    <spring.version>6.0.6</spring.version>
    <servlet.api>9.1.0</servlet.api>
    <maven.compiler.source>17</maven.compiler.source>
    <maven.compiler.target>17</maven.compiler.target>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>
    <!-- springioc相关依赖  -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
    </dependency>
    
    <dependency>
        <groupId>jakarta.platform</groupId>
        <artifactId>jakarta.jakartaee-web-api</artifactId>
        <version>${servlet.api}</version>
        <scope>provided</scope>
    </dependency>
    <!-- springwebmvc相关依赖  -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${spring.version}</version>
    </dependency>
</dependencies>

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@Controller
public class HelloController {
    @RequestMapping("/springmvc/hello")
    @ResponseBody
    public String hello(){
        System.out.println("HelloController.hello");
        return "hello springmvc!!";
    }
}

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//@EnableWebMvc  ----与bean方式二选一
@Configuration
@ComponentScan(basePackages = "com.atguigu.controller")
public class SpringMvcConfig implements WebMvcConfigurer {
    @Bean
    public HandlerMapping handlerMapping(){
        return new RequestMappingHandlerMapping();
    }
    @Bean
    public HandlerAdapter handlerAdapter(){
        return new RequestMappingHandlerAdapter();
    }
}

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public class MyWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

  /**
   * 指定service / mapper层的配置类
   */
  @Override
  protected Class<?>[] getRootConfigClasses() {
    return null;
  }

  /**
   * 指定springmvc的配置类
   */
  @Override
  protected Class<?>[] getServletConfigClasses() {
    return new Class<?>[] { SpringMvcConfig.class };
  }

  /**
   * 设置dispatcherServlet的处理路径!
   * 一般情况下为 / 代表处理所有请求!
   */
  @Override
  protected String[] getServletMappings() {
    return new String[] { "/" };
  }
}

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@Controller
@RequestMapping("param")
public class ParamController {
    // 1. 单值
    @GetMapping(value="/value")
    @ResponseBody
    public String setupForm(String name,int age){
        System.out.println("name = " + name + ", age = " + age);
        return name + age;
    }
    // 2.提供默认值
    @GetMapping(value="/data")
	@ResponseBody
	public Object paramForm(@RequestParam("name") String name, 
        @RequestParam(value = "stuAge",required = false,defaultValue = "18") int age){
    	System.out.println("name = " + name + ", age = " + age);
    	return name+age;
	}
    // 3.一名多值 @RequestParam注解
    @GetMapping(value="/mul")
    @ResponseBody
    public Object mulForm(@RequestParam List<String> hbs){
        System.out.println("hbs = " + hbs);
        return hbs;
    }
    // 4. 实体类接收
    @PostMapping(value = "/user")
    @ResponseBody
    public String addUser(User user) {
        System.out.println("user = " + user);
        return "success";
    }
}

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@GetMapping("/user/{id}/{name}")
@ResponseBody
public String getUser(@PathVariable Long id, 
                      @PathVariable("name") String uname) {
    System.out.println("id = " + id + ", uname = " + uname);
    return "user_detail";
}

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@PostMapping("/person")
@ResponseBody
public String addPerson(@RequestBody Person person) {
  return "success";
}

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<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.15.0</version>
</dependency>

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@EnableWebMvc  
@Configuration
@ComponentScan(basePackages = "com.atguigu.controller") 
public class SpringMvcConfig implements WebMvcConfigurer {

}

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@Restcontroller
@RequestMapping("param")
public class ParamController {
}

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@RestControllerAdvice
public class GlobalExceptionHandler {
	@ExceptionHandler(HttpMessageNotReadableException.class)
	public Object handlerJsonDateException(HttpMessageNotReadableException e){
    return null;
	}
}

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@ComponentScan(basePackages = {"controller","exceptionhandler"})

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public class Process01Interceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("request = " + request + ", response = " + response + ", handler = " + handler);
        System.out.println("Process01Interceptor.preHandle");
         
        // 返回true：放行
        // 返回false：不放行
        return true;
    }
 
    // 在目标 handler 方法之后，handler报错不执行
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("request = " + request + ", response = " + response + ", handler = " + handler + ", modelAndView = " + modelAndView);
        System.out.println("Process01Interceptor.postHandle");
    }
 
    // 渲染视图之后执行(最后),一定执行
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("request = " + request + ", response = " + response + ", handler = " + handler + ", ex = " + ex);
        System.out.println("Process01Interceptor.afterCompletion");
    }
}

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@EnableWebMvc  
@Configuration
@ComponentScan(basePackages = {"controller","exceptionhandler"}) 
public class SpringMvcConfig implements WebMvcConfigurer {
    //添加拦截器
    @Override
    public void addInterceptors(InterceptorRegistry registry) { 
        //将拦截器添加到Springmvc环境,默认拦截所有Springmvc分发的请求
        registry.addInterceptor(new Process01Interceptor());
        // 指定拦截路径
        registry.addInterceptor(new Process01Interceptor())
            .addPathPatterns("/common/request/one","/common/request/tow")
            .excludePathPatterns("/common/request/tow");
    }
}