SSM整合后的使用

时间:2022-10-31 07:17:31

一. ssm中添加分页控件

1.添加jar包

<!-- 添加分页插件的依赖包 -->
<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

<!--在版本5之前的配置方式 -->
<!--
<plugins>
<plugin interceptor="com.github.pagehelper.PageHelper">
<property name="dialect" value="mysql" />
</plugin>
</plugins>
-->
<!-- 在版本5之后的配置方式-->
<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}<br/>
</c:forEach>

总共查询到<span>${pageInfo.total}</span>条记录,
共<span>${pageInfo.pages}</span>页
当前是第<span>${pageInfo.pageNum}</span>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

<!-- 导入aop 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">

<!-- 创建切面类对象 -->
<bean class="com.test.aspects.TimeAspects" />

<!-- 开启 aop 自动代理
做织入操作
-->
<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

<!-- 配置spring...xml文件的路径 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext-*.xml</param-value>
</context-param>

<!-- 配置context 加载的监听器 -->
<!-- 加载spring 的容器 -->
<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

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