拦截器WebMvcConfigurer和HandlerInterceptorAdapter

WebMvcConfigurer：拦截器的注册类
HandlerInterceptorAdapter：拦截组件

拦截组件HandlerInterceptorAdapter可以有多个，需要注册到WebMvcConfigurer里面，在WebMvcConfigurer里面拦截器是按顺序执行的。

@SpringBootConfiguration

public class InterceptorConfig implements WebMvcConfigurer {
/** 拦截器配置，与业务相关，有着强烈的前后依赖顺序

 请不要在datasourceInterceptor这个拦截器之后再添加，这个拦截器preHandler是进入业务代码最后一个拦截器
@Override

public void addInterceptors(InterceptorRegistry registry){
WebMvcConfigurer.super.addInterceptors(registry);

registry.addInterceptor(loggerInterceptor());

registry.addInterceptor(authenticateInterceptor());

registry.addInterceptor(datasourceInterceptor());

}

//日志拦截

@Bean(“loggerInterceptor”)

public LoggerInterceptor loggerInterceptor(){
LoggerInterceptor interceptor = new LoggerInterceptor ();

return interceptor;

}

//认证拦截，安全校验相关的拦截操作

@Bean(“authenticateInterceptor”)

public AuthenticateInterceptor authenticateInteceptor(){
AuthenticateInterceptor interceptor =new AuthenticateInterceptor();

return interceptor;

}

}

public class AuthenticateInterceptor implements HandlerInterceptor {
//无需拦截的url

private HashSet set =new HashSet<>();

public AuthenticateInterceptor (){
set .add(“/test/login.do”);

…….

}

@Override

public boolean preHandle(HttpServletRequest request,HttpServletResponse response,Object handler) throw Exception{
//具体拦截业务

}

}