Spring AOP + PageHelper分页

• 2019 年 12 月 31 日
• 笔记

1. 增加依赖配置 <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.6.11</version> <groupId>org.aspectj</groupId> <artifactId>aspectjrt</artifactId> <version>1.6.11</version>

增加pagehelper

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

1. 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" />
2. 增加注解 @Target({ElementType.PARAMETER, ElementType.METHOD}) @Retention(RetentionPolicy.RUNTIME) @Documented public @interface EnablePaging { String value() default ""; }
3. 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);      }      }

1. 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); }