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; @RestController 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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