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SpringBoot之WEB(三)
Interceptor
1 自定义Interceptor
使用 @Component 让 Spring 管理其生命周期:
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Created by HuangJun
* 10:43 2018/11/9
*/
@Component
public class MyInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("========preHandle=========");
System.out.println(((HandlerMethod)handler).getBean().getClass().getName());
System.out.println(((HandlerMethod)handler).getMethod().getName());
request.setAttribute("startTime", System.currentTimeMillis());
return true;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView)
throws Exception {
System.out.println("========postHandle=========");
Long start = (Long) request.getAttribute("startTime");
System.out.println("耗时:"+(System.currentTimeMillis() - start));
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception exception)
throws Exception {
System.out.println("========afterCompletion=========");
Long start = (Long) request.getAttribute("startTime");
System.out.println("耗时:"+(System.currentTimeMillis() - start));
System.out.println(exception);
}
}
2 注册Interceptor
在上文创建的 InterceptorConfig类:
import com.springboot.web.interceptor.MyInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
/**
* Created by HuangJun
* 10:50 2018/11/9
*/
@Configuration
public class InterceptorConfig extends WebMvcConfigurerAdapter {
@Autowired
private MyInterceptor myInterceptor;
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(myInterceptor);
}
}
3 运行结果
观察控制台打印输出,结果如下图
4 源码下载
源码下载地址:https://download.csdn.net/download/huangjun0210/10774393