Spring AOP + PageHelper分页

1、增加依赖配置

    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjweaver</artifactId>
      <version>1.6.11</version>
    </dependency>

    <dependency>
      <groupId>org.aspectj</groupId>
      <artifactId>aspectjrt</artifactId>
      <version>1.6.11</version>
    </dependency>

　　增加pagehelper

    <dependency>
      <groupId>com.github.pagehelper</groupId>
      <artifactId>pagehelper</artifactId>
      <version>4.1.0</version>
    </dependency>

　　

2、增加配置

 <context:component-scan base-package="com.example.controller"/>

    <!-- 启动对@AspectJ注解的支持 -->
    <aop:aspectj-autoproxy/>

    <!--启动springmvc注解-->
    <mvc:annotation-driven content-negotiation-manager="contentNegotiationManager" />

　　

3、增加注解

@Target({ElementType.PARAMETER, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface EnablePaging {
    String value()  default "";
}

　　

4、 增加AOP文件。

这里约定最后两个参数是pageNum 和pageSize

@Aspect
@Component
@Slf4j
public class PageAop {

   @Pointcut("@annotation(com.example.annotation.EnablePaging)")
    public void serviceAspect(){
        log.info("serviceAspect");
    }

    @Before("serviceAspect()")
    public  void doBefore(JoinPoint joinPoint) {
        log.info("doBefore");
    }

    @Around(value = "serviceAspect()")
    public Object doAround(ProceedingJoinPoint point) throws  Throwable{
        log.info("doAround ");
        Object[] args = point.getArgs();
        Integer pageNum = 1;
        Integer pageSize = 10;
        if(args.length >= 2){
            pageNum = (Integer)args[args.length -2];
            pageSize = (Integer)args[args.length - 1];
        }
        PageHelper.startPage(pageNum, pageSize);
        return  point.proceed(args);
    }

}

5. Controller层

  @RequestMapping(value = "queryLogs")
    @EnablePaging
    @ResponseBody
    public  ServerResponse<PageInfo> queryLogs(HttpServletResponse response,
                                                      @RequestParam(value = "pageNum",defaultValue = "1") int pageNum,
                                                      @RequestParam(value = "pageSize",defaultValue = "10")int pageSize){
        List<Log> list =  iLogService.queryList(pageNum, pageSize);
        PageInfo pageInfo = new PageInfo(list);
        return ServerResponse.createBySuccess(pageInfo);
    }