1.自定义过滤器实现接口HandlerInterceptor
package com.huacheng.config;import org.springframework.lang.Nullable;import org.springframework.stereotype.Component;import org.springframework.web.servlet.HandlerInterceptor;import org.springframework.web.servlet.ModelAndView;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;@Componentpublic class TimeInterceptor implements HandlerInterceptor { public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { System.out.println(">>>>>>>>>>>preHandle执行了<<<<<<<<<<<<<<<<<<"); return true; } public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable ModelAndView modelAndView) throws Exception { System.out.println(">>>>>>>>>>>postHandle执行了<<<<<<<<<<<<<<<<<<"); } public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable Exception ex) throws Exception { System.out.println(">>>>>>>>>>>afterCompletion执行了<<<<<<<<<<<<<<<<<<"); }}
2.定义一个配置类，把这个自定义的过滤器注册进去
package com.huacheng.config;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;@Configurationpublic class WebConfig extends WebMvcConfigurerAdapter { @Autowired private TimeInterceptor timeInterceptor; @Override public void addInterceptors(InterceptorRegistry registry) { registry.addInterceptor(timeInterceptor); }}
3.写一个控制器测试
package com.huacheng.controller;import com.huacheng.domain.User;import org.springframework.web.bind.annotation.PostMapping;import org.springframework.web.bind.annotation.RestController;@RestControllerpublic class UserController { @PostMapping("/user/getUser") public String getUser(User user) { System.out.println(user); return "hello"; }}
4.应用postman工具测试
控制台打印如下
postman工具相应后果