1：创建拦截器类，实现HandlerInterceptor接口
package com.duck.interceptor;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class DuckTestInterceptor implements HandlerInterceptor {
public boolean preHandle(HttpServletRequest request,
HttpServletResponse response, Object handler) throws Exception {
System.out.println(this.getClass().getName() + "<------>preHandle");
return true;
}
public void postHandle(HttpServletRequest request,
HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
System.out.println(this.getClass().getName() + "<------>postHandle");
}
public void afterCompletion(HttpServletRequest request,
HttpServletResponse response, Object handler, Exception ex)
throws Exception {
System.out.println(this.getClass().getName() + "<------>afterCompletion");
}
}
2：创建java类，继承WebMvcConfigurerAdapter，重写addInterceptors方法
实例化拦截器类并将其添加到拦截器链中。
package com.duck.interceptor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
@Configuration
public class InterceptorRegister extends WebMvcConfigurerAdapter{
private static final Logger logger = LoggerFactory.getLogger(InterceptorRegister.class);
/*
* 添加spring中的拦截器
*/
@Override
public void addInterceptors(InterceptorRegistry registry){
registry.addInterceptor(new DuckTestInterceptor()).addPathPatterns("/freemarker/**");
super.addInterceptors(registry);
}
}
3：访问http://localhost:8080/freemarker可见日志，后台已经拦截到
image.png
