关于java:自定义Enable

顺手记录一下。

import org.springframework.context.annotation.Import;

import java.lang.annotation.*;

@Target({ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
@Import({RoleCheckConfig.class})
public @interface EnableRoleCheck {}

import com.cx.demo_role_check.filter.RoleCheckFilter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;

import javax.servlet.Filter;

public class RoleCheckConfig {public RoleCheckConfig() { }

    // 注入 filter
    @Bean
    public RoleCheckFilter roleCheckFilter(){return new RoleCheckFilter();
    }

    // 将 Filter 注册到 web
    @Bean
    public FilterRegistrationBean<Filter> roleCheckFilterRegistration(RoleCheckFilter roleCheckFilter){FilterRegistrationBean<Filter> filterFilterRegistrationBean = new FilterRegistrationBean<>();
        filterFilterRegistrationBean.setFilter(roleCheckFilter);
        filterFilterRegistrationBean.setName("roleCheckFilter");
        return filterFilterRegistrationBean;
    }



}

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class RoleCheckFilter implements Filter {

    private String excludeURLRole;
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {System.out.println("init");
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {HttpServletRequest httpServletRequest = (HttpServletRequest)request;
        HttpServletResponse httpServletResponse = (HttpServletResponse) response;
        System.out.println(httpServletRequest.getRequestURI());
        // 实现过滤器的性能
        if (false){// 条件判断  未通过校验 不能够拜访
            httpServletResponse.setStatus(403);
        }else{// 间接拜访接口
            filterChain.doFilter(request,response);
        }
    }

    @Override
    public void destroy() {System.out.println("destroy");
    }
}

在其余的我的项目外面援用相干的 jar，启动类上加上相干的注解，性能即可失效。

<dependency>
    <groupId>com.cx</groupId>
    <artifactId>demo_role_check</artifactId>
    <version>0.0.1-SNAPSHOT</version>
</dependency>

import com.cx.demo_role_check.config.EnableRoleCheck;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@EnableRoleCheck
public class DemoRoleCheckTestApplication {public static void main(String[] args) {SpringApplication.run(DemoRoleCheckTestApplication.class, args);
    }

}