ssm整合后的使用

拼搏现实的明天。 2024-04-01 12:42 47阅读 0赞

## 一. ssm中添加分页控件 ##

#### 1.添加jar包 ####

<dependency>
 <groupId>com.github.pagehelper</groupId>
 <artifactId>pagehelper</artifactId>
 <version>5.1.2</version>
 </dependency>

#### 2.配置分页拦截器 ####

mybatis.xml文件中添加

<plugins>
 <plugin interceptor="com.github.pagehelper.PageInterceptor" />
 </plugins>

#### 3.在service层添加一个分页方法 ####

//分页查询
 @Override
 public PageInfo<Items> selectItems(int pageindex, int pagesize) {
 
 //开启分页 在后面调用查询语句的时候会加入limit
 PageHelper.startPage(pageindex,pagesize);
 
 //调用查询所有的方法 （会被加入limit）
 List<Items> itemsList= itemsMapper.selectItems();
 
 //组装pageinfo对象返回
 PageInfo<Items> pageInfo=new PageInfo<Items>(itemsList);
 
 return pageInfo;
 
 
 }

#### 4.在控制层调用分页方法 ####

@RequestMapping("/selectItemsListByPage")
 public ModelAndView selectItemsListByPage(@RequestParam(value ="pageindex",defaultValue ="1" ) int pageindex)
 {
 
 PageInfo<Items> pageInfo = itemsService.selectItems(pageindex,3);
 
 ModelAndView modelAndView=new ModelAndView();
 
 modelAndView.addObject("pageInfo",pageInfo);
 
 modelAndView.setViewName("showItemsByPage");
 
 return modelAndView;
 
 
 
 }

#### 5.创建showItemsByPage.jsp显示 ####

<c:forEach var="items" items="${pageInfo.list}">
 ${items.name} 
 </c:forEach>
 
 总共查询到${pageInfo.total}条记录,
 共${pageInfo.pages}页
 当前是第${pageInfo.pageNum}页
 
 <c:forEach var="i" begin="1" end="${pageInfo.pages}" >
 <a href="selectItemsListByPage?pageindex=${i}">${i}</a>  
 </c:forEach>

## 二 .ssm中添加aop ##

#### 1.导入jar ####

<dependency>
 <groupId>org.aspectj</groupId>
 <artifactId>aspectjweaver</artifactId>
 <version>1.8.10</version>
 </dependency>
 
 <dependency>
 <groupId>org.springframework</groupId>
 <artifactId>spring-aspects</artifactId>
 <version>4.1.3.RELEASE</version>
 </dependency>
 
 <dependency>
 <groupId>org.springframework</groupId>
 <artifactId>spring-aop</artifactId>
 <version>4.1.3.RELEASE</version>
 </dependency>

#### 2.创建切面类 ####

package com.test.aspects;
    
    import net.sf.jsqlparser.statement.execute.Execute;
    import org.aspectj.lang.annotation.AfterReturning;
    import org.aspectj.lang.annotation.Aspect;
    import org.aspectj.lang.annotation.Before;
    import org.aspectj.lang.annotation.Pointcut;
    
    import java.beans.Expression;
    import java.text.SimpleDateFormat;
    import java.util.Date;
    
    @Aspect
    public class TimeAspects {
    
        @Pointcut("execution(* com.test.service.impl.ItemsService.select*(..))")
        public void point()
        {}
    
        @Before("TimeAspects.point()")
        public void before()
        {
            SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss:ms");
    
            System.out.println("开始执行的时间:"+simpleDateFormat.format(new Date()));
        }
    
        @AfterReturning("execution(* com.test.service.impl.ItemsService.select*(..))")
        public void afterReturn()
        {
            SimpleDateFormat simpleDateFormat=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss:ms");
    
            System.out.println("成功执行的时间:"+simpleDateFormat.format(new Date()));
        }
    
    }

#### 3.创建aop的配置文件 ####

applicationContext-aop.xml

因为扫描包的配置已经在application-ioc.xml文件中配置过,这里不需要重复

<?xml version="1.0" encoding="UTF-8"?>
 <beans xmlns="http://www.springframework.org/schema/beans"
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 xmlns:context="http://www.springframework.org/schema/context"
 xmlns:aop="http://www.springframework.org/schema/aop"
 xsi:schemaLocation="http://www.springframework.org/schema/beans
 http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
 http://www.springframework.org/schema/context
 http://www.springframework.org/schema/context/spring-context-4.0.xsd
 http://www.springframework.org/schema/aop
 http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
 http://www.springframework.org/schema/tx
 http://www.springframework.org/schema/tx/spring-tx.xsd">
 
 
 <bean id="timeAspects" class="com.test.aspects.TimeAspects" />
 
 
 <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
 
 
 </beans>

#### 4.修改web.xml文件中的spring配置文件的导入 ####

改为applicationContext-\*.xml

<context-param>
 <param-name>contextConfigLocation</param-name>
 <param-value>classpath:applicationContext-*.xml</param-value>
 </context-param>
 
 
 
 <listener>
 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
 </listener>

#### 5.运行 ####

http://localhost:8080/testssm/items/selectItemsListByPage

因为这个方法中会调用service层的selectItemsListByPage方法，符合切点，所以会织入进来

。。。

成功执行的时间:2019-06-26 04:13:12:1312