maven創建springBoot工程很簡單:
File-->new-->project-->Spring Initializr-->next-->next-->web-->web
裏面自動生成了一個啓動類SpringbootExampleApplication:
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class SpringbootExampleApplication {
public static void main(String[] args) {
SpringApplication.run(SpringbootExampleApplication.class, args);
}
}
自定義一個Controller:
@Controller
public class HelloController {
@ResponseBody
@RequestMapping("/hello/{userId}")
public String say(@PathVariable("userId") Integer userId){
System.out.println("進入controller中的say方法");
return "Hello:" + userId;
}
@ResponseBody
@RequestMapping("/search")
public List<String> getAllInfo(){
List<String> res = new ArrayList<>();
res.add("wqh");
res.add("hello");
res.add("end");
return res;
}
}
右擊SpringbootExampleApplication,選擇Debug,發現tomcat已經啓動。
測試均沒問題:
http://localhost:8080/hello/4
http://localhost:8080/search
有時候需要自定義一個SpringBoot攔截器完成相關需求。
定義一個攔截器:
@Component
public class MyInterceptor1 implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println(">>>MyInterceptor1>>>>>>>在請求處理之前進行調用(Controller方法調用之前)");
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println(">>>MyInterceptor1>>>>>>>請求處理之後進行調用,但是在視圖被渲染之前(Controller方法調用之後)");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println(">>>MyInterceptor1>>>>>>>在整個請求結束之後被調用,也就是在DispatcherServlet 渲染了對應的視圖之後執行(主要是用於進行資源清理工作)");
}
}
配置類:
@Configuration
public class MyWebAppConfigurer implements WebMvcConfigurer {
@Autowired
MyInterceptor1 myInterceptor1;
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(myInterceptor1).addPathPatterns("/**").excludePathPatterns("/search");//選擇過濾的url請求
}
}
實現WebMvcConfigurer接口,不要繼承WebMvcConfigurerAdapter這個類,因爲該類已經過時,也不要繼承WebMvcConfigurationSupport這個類,因爲該類會使WebMvc自動失效。可參考:
https://blog.csdn.net/qq_35299712/article/details/80061532
參考: