整合目标:控制层采用springmvc、持久层使用mybatis实现
整合思路:
Dao层:
1、SqlMapConfig.xml,空文件即可,但是需要文件头。
2、applicationContext-dao.xml
a) 数据库连接池
b) SqlSessionFactory对象,需要spring和mybatis整合包下的。
c) 配置mapper文件扫描器。
Service层:
1、applicationContext-service.xml包扫描器,扫描@service注解的类。
2、applicationContext-trans.xml配置事务。
Controller层:
1、Springmvc.xml
a) 包扫描器,扫描@Controller注解的类。
b) 配置注解驱动
c) 配置视图解析器
Web.xml文件:
1、配置spring
2、配置前端控制器。
详细配置如下:
一、SSM框架整合
1.1、整合思路
从底层整合起,也就是先整合mybatis与spring,然后在编写springmvc。
1.2、开发需求
查询商品列表(从数据库中查询)
1.3、创建web工程
现在ssm的工程创建就有区别于原先的dao、service、web这样的三层目录了,现在是mapper、service、controller这样的目录,mapper就相当于以前的dao、controller相当于以前的web,改变了名称而已。不要因此看不懂了。
1.4、添加jar包
导包
- spring(包括springmvc)
- mybatis
- mybatis-spring整合包
- 数据库驱动
- 第三方连接池。
1.5、开始整合mapper(mybatis与spring的整合)
直接上代码。
1.5.1、SqlMapConfig.xml
xml version="1.0" encoding="UTF-8" ?> DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd"> <configuration> (逆向工程不需要起别名) <typeAliases> <package name="com.wuhao.ms.domain"/> typeAliases> <mappers> <package name="com.wuhao.ssm.mapper"/> mappers> configuration>
1.5.2、applicationContext-dao.xml的配置
xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"> <context:property-placeholder location="classpath:db.properties" /> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <property name="maxActive" value="10" /> <property name="maxIdle" value="5" /> bean> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml" /> bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="cn.itcast.ssm.mapper" /> bean> beans>
这里需要注意一点,在指定mybatis的全局配置文件的路径的时候,也就是在value="classpath:SqlMapConfig.xml"时,如果在创建的config的配置文件目录下还有层级目录,则这里需要加上,比如,config下面分为了mybatis和spring,那么这里就需要写value="classpath:mybatis/SqlMapConfig.xml",看根据你自己的需求来编写
1.5.3、db.properties配置
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/springmvc?characterEncoding=utf-8
jdbc.username=root
jdbc.password=root
1.5.4、开发mapper,将逆向工程生成的添加进来
注意:Mapper开发时,先要根据需求进行分析,是否匹配逆向工程生成的代码,如果匹配成功,则不需要再开发mapper;如果不匹配,再去扩展一个新的mapper接口和mapper映射文件来处理该需求,通俗点讲,就是逆向工程生成的mapper接口中的定义的功能是否满足我们开发的需求,因为逆向工程生成的都是对于单表进行操作的,而我们有时候需要的是更复杂的查询,所以如果有需要我们在自己创建mapper接口和mapper映射文件,其实就是扩展功能。
1.6、整合service
添加applicationContext-service.xml配置文件,用来处理事务,
applicationContext-service.xml:如果不懂其中的代码的意思,就查看之前讲解spring管理事务的文章。这里直接复制粘帖即可,修改一些包名称等
xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 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-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd"> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> bean> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="save*" propagation="REQUIRED" /> <tx:method name="insert*" propagation="REQUIRED" /> <tx:method name="delete*" propagation="REQUIRED" /> <tx:method name="update*" propagation="REQUIRED" /> <tx:method name="find*" propagation="SUPPORTS" read-only="true" /> <tx:method name="get*" propagation="SUPPORTS" read-only="true" /> <tx:method name="query*" propagation="SUPPORTS" read-only="true" /> tx:attributes> tx:advice> <aop:config> <aop:advisor advice-ref="txAdvice" pointcut="execution(* cn.itcast.ssm.service.*.*(..))" /> aop:config> beans>
1.7、整合controller
也就是使用springmvc了。非常简单。
1.7.1、在web.xml中配置前端控制器DispatcherServlet
xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>springmvc-webdisplay-name> <welcome-file-list> <welcome-file>index.htmlwelcome-file> <welcome-file>index.htmwelcome-file> <welcome-file>index.jspwelcome-file> <welcome-file>default.htmlwelcome-file> <welcome-file>default.htmwelcome-file> <welcome-file>default.jspwelcome-file> welcome-file-list> <context-param> <param-name>contextConfigLocationparam-name> <param-value>classpath:spring/applicationContext*.xmlparam-value> context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class> listener> <servlet> <servlet-name>springmvc-webservlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class> <init-param> <param-name>contextConfigLocationparam-name> <param-value>classpath:spring/springmvc.xmlparam-value> init-param> servlet> <servlet-mapping> <servlet-name>springmvc-webservlet-name> <url-pattern>*.actionurl-pattern> servlet-mapping> web-app>
1.7.2、配置springmvc.xml
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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"> <context:component-scan base-package="com.itheima"/> <mvc:annotation-driven conversion-service="conversionServiceFactoryBean"/> <bean id="conversionServiceFactoryBean" class="org.springframework.format.support.FormattingConversionServiceFactoryBean"> <property name="converters"> <list> <bean class="com.itheima.springmvc.conversion.DateConveter"/> list> property> bean> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/"/> <property name="suffix" value=".jsp"/> bean> beans>
1.8、整合spring配置文件
就是将所有的spring的配置文件都进行加载启动。也就是在web.xml中配置spring的监听器
1.9、总结所有的配置如下图
1.10、部署测试
1.10.1、查询商品列表(从数据库中查询)
1、编写service层
ItemsService 接口
package com.itheima.springmvc.service; import java.util.List; import com.itheima.springmvc.pojo.Items; public interface ItemService { //查询商品列表 public ListselectItemsList(); public Items selectItemsById(Integer id); //修改 public void updateItemsById(Items items); }
ItemsServiceImpl 实现类 使用注解开发
package com.itheima.springmvc.service; import java.util.Date; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.itheima.springmvc.dao.ItemsMapper; import com.itheima.springmvc.pojo.Items; @Service public class ItemServiceImpl implements ItemService { @Autowired private ItemsMapper itemsMapper; //查询商品列表 public ListselectItemsList(){ return itemsMapper.selectByExampleWithBLOBs(null);(检索字段中存在大字段类型,例如text字段类型) } public Items selectItemsById(Integer id){ return itemsMapper.selectByPrimaryKey(id); } //修改 public void updateItemsById(Items items){ items.setCreatetime(new Date()); itemsMapper.updateByPrimaryKeyWithBLOBs(items); } }
2、编写controller层
ItemsController
package com.itheima.springmvc.controller; import java.util.ArrayList; import java.util.Date; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.HttpRequestHandler; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.servlet.ModelAndView; import com.itheima.springmvc.pojo.Items; import com.itheima.springmvc.pojo.QueryVo; import com.itheima.springmvc.service.ItemService; @Controller public class ItemController { @Autowired private ItemService itemService; //入门程序 第一 包类 + 类包 + 方法名 @RequestMapping(value = "/item/itemlist.action") public ModelAndView itemList(){ //从Mysql中查询 Listlist = itemService.selectItemsList(); ModelAndView mav = new ModelAndView(); //数据 mav.addObject("itemList", list); mav.setViewName("itemList"); return mav; } //去修改页面 入参 id @RequestMapping(value = "/itemEdit.action") // public ModelAndView toEdit(@RequestParam(value = "id",required = false,defaultValue = "1") Integer idaaq, public ModelAndView toEdit(Integer id, HttpServletRequest request,HttpServletResponse response ,HttpSession session,Model model){ //Servlet时代开发 // String id = request.getParameter("id"); //查询一个商品 // Items items = itemService.selectItemsById(Integer.parseInt(id)); Items items = itemService.selectItemsById(id); ModelAndView mav = new ModelAndView(); //数据 mav.addObject("item", items); mav.setViewName("editItem"); return mav; } //提交修改页面 入参 为 Items对象 @RequestMapping(value = "/updateitem.action") // public ModelAndView updateitem(Items items){ public ModelAndView updateitem(QueryVo vo){ //修改 itemService.updateItemsById(vo.getItems()); ModelAndView mav = new ModelAndView(); mav.setViewName("success"); return mav; } }
3、添加jsp页面
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> <%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt"%> DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>查询商品列表title> head> <body> <form action="${pageContext.request.contextPath }/item/queryItem.action" method="post"> 查询条件: <table width="100%" border=1> <tr> <td><input type="submit" value="查询"/>td> tr> table> 商品列表: <table width="100%" border=1> <tr> <td>商品名称td> <td>商品价格td> <td>生产日期td> <td>商品描述td> <td>操作td> tr> <c:forEach items="${itemsList }" var="item"> <tr> <td>${item.name }td> <td>${item.price }td> <td><fmt:formatDate value="${item.createtime}" pattern="yyyy-MM-dd HH:mm:ss"/>td> <td>${item.detail }td> <td><a href="${pageContext.request.contextPath }/editItems.do?id=${item.id}">修改a>td> tr> c:forEach> table> form> body> html>
4、测试http://localhost:8080/springmvc-mybatis/item/itemlist.action