Spring Boot拦截器实现步骤及测试实例

Spring Boot拦截器实现步骤及测试实例

第一步，定义拦截器：

package com.zl.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 myInterceptor implements HandlerInterceptor {

@Override

public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

System.out.println("preHandle");

return true;

}

@Override

public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

System.out.println("preHandle");

}

@Override

public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

System.out.println("preHandle");

}

}

控制台打印三个输出语句，作为测试。

第二步：配置拦截器

package com.zl.interceptor;

import org.springframework.context.annotation.Bean;

import org.springframework.context.annotation.Configuration;

import org.springframework.web.servlet.config.annotation.InterceptorRegistry;

import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

@Configuration

public class WebMVCConfig implements WebMvcConfigurer {

@Override

public void addInterceptors(InterceptorRegistry registry) {

registry.addInterceptor(myInterceptor()).addPathPatterns("/**");

}

@Bean

myInterceptor myInterceptor(){

return new myInterceptor();

}

}

将定义的拦截器注入到这个配置方法中，并拦截所有路径。

第三步：写个接口测试

package com.zl.interceptor;

import org.springframework.web.bind.annotation.GetMapping;

import org.springframework.web.bind.annotation.RestController;

@Rhttp://estController

public class helloController {

@GetMapping("/hello")

public String hello(){

return "hello";

}

}

测试结果

定义的拦截器三个方法都执行了。

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