SpringMVC和Mybatis （一）整合思路、整合dao、service、springmvc、加載spring

開發分層開發：前端層，業務層，持久層

sping將各層進行整合：
通過spring管理持久層的mapper
通過spring管理service，可以調用mapper接口，進行事務控制。
通過spring管理Handler，可以調用service接口
mapper、service、Handler都是javaBean

第一步整合dao層
使用mapper的掃描器自動掃描mapper接口在spring中進行註冊

第二步整合service層
使用配置方式將service接口配置在spring配置文件中。
實現事務控制，根據業務層在哪裏，事務層在哪裏。

第三步整合springmvc
不需要整合

1.加載jar包：數據庫驅動包、mybatis包、mybatis和spring整合包、log4j包、dbcp數據庫連接池包、

spring所有包、jstl包
2.創建config創建log4j.properties

config創建db.properties

3.創建包：controller、mapper、po、service、創建ItemsService.java、service.impl。

4.整合dao（mybatis和spring進行整合）
config創建mybatis包創建sqlMapConfig.xml

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>




<typeAliases>

<package name="cn.itcast.ssm.po" />
</typeAliases>





</configuration>

在config創建spring創建applicationContext-dao.xml、applicationContext-service.xml、applicationContext-transaction.xml、springmvc.xml

applicationContext-dao.xml

配置：數據源、SqlSessionFactory

<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.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="configLocation" value="classpath:mybatis/sqlMapConfig.xml" />

<property name="dataSource" ref="dataSource" />
</bean>


<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">

<property name="basePackage" value="cn.itcast.ssm.mapper" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>

</beans>

編寫mapper使用逆向工程
生成：
ssm.mapper和ssm.po的包

針對綜合查詢mapper，手動定義商品查詢mapper
ItemsMapperCustom.xml
sql語句：SELECT * FROM items WHERE NAME LIKE '%批量%'

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="cn.itcast.ssm.mapper.ItemsMapperCustom" >


<sql id="query_items_where">


<if test="itemsCustom!=null">
<if test="itemsCustom.name!=null and itemsCustom.name!=''">
items.name LIKE '%${itemsCustom.name}%'
</if>
</if>
</sql>


<select id="findItemsList" parameterType="cn.itcast.ssm.po.ItemsQueryVo"
resultType="cn.itcast.ssm.po.ItemsCustom">
SELECT * FROM items
<where>
<include refid="query_items_where"></include>
</where>
</select>

</mapper>

ItemsMapperCustom.java接口
public interface ItemsMapperCustom {

//商品查詢列表
public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo)throws Exception;
}

定義包裝對象po類
ItemsQueryVo.java 增加set和get方法
public class ItemsQueryVo {

//商品信息包裝進入
private Items items;

//爲了系統可以擴展性，對商品信息定義擴展類
private ItemsCustom itemsCustom;

不使用原始的po類，使用擴展類
ItemsCustom.java
//商品信息的擴展類
public class ItemsCustom extends Items{

//添加商品擴展的屬性
}
==================================================================================
整合service層
讓spring管理service接口。
定義service接口ItemsService.java
//商品管理service
public interface ItemsService {

//商品查詢列表
public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo)throws Exception;
}

service實現類
ItemsServiceImpl.java
public class ItemsServiceImpl implements ItemsService {

@Autowired
private ItemsMapperCustom itemsMapperCustom;

//itemsMapperCustom直接從service傳到dao
@Override
public List<ItemsCustom> findItemsList(ItemsQueryVo itemsQueryVo) throws Exception {
// TODO Auto-generated method stub
return itemsMapperCustom.findItemsList(itemsQueryVo);
}

}

在spring容器配置service接口
applicationContext-service.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"

xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">


<bean id="itemsService" class="cn.itcast.ssm.service.impl.ItemsServiceImpl" />
</beans>
事務控制
applicationContext-transation
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"

xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.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="delete*" propagation="REQUIRED"/>
<tx:method name="insert*" 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="select*" propagation="SUPPORTS" read-only="true"/>
</tx:attributes>
</tx:advice>


<aop:config>
<aop:advisor advice-ref="txAdvice" pointcut="execution(*

cn.itcast.ssm.service.impl.*.*(..))"/>
</aop:config>
</beans>
=====================================================================================
整合springmvc
創建springmvc.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">


<context:component-scan base-package="cn.itcast.ssm.controller" ></context:component-scan>





<mvc:annotation-driven></mvc:annotation-driven>


<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">

<property name="prefix" value="/WEB-INF/jsp/" />

<property name="suffix" value=".jsp" />
</bean>

</beans>

配置前端控制器
web.xml
<?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>springmv_mybatis1208</display-name>



<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/springmvc.xml</param-value>
</init-param>
</servlet>

<servlet-mapping>
<servlet-name>springmvc</servlet-name>

<url-pattern>*.action</url-pattern>
</servlet-mapping>


<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
</web-app>

編寫Handler（Controller）

ItemsController.java

//使用Controller標識他是一個控制器
@Controller
public class ItemsController {

//注入service
@Autowired
private ItemsService itemsService;

//商品查詢列表
//一般建議將url和方法名寫成一樣,方便queryItems和url進行映射，一個方法對應一個url
@RequestMapping("/queryItems")
public ModelAndView queryItems()throws Exception{
//調用service查找數據庫，查詢商品，這裏先使用靜態模擬
List<ItemsCustom> itemsList = itemsService.findItemsList(null);

//返回ModelAndView
ModelAndView modelAndView = new ModelAndView();
//相當於request的setAttribut，在jsp頁面中通過itemsList取數據
modelAndView.addObject("itemsList",itemsList);

//指定視圖
//下邊的路徑，如果在視圖解析器中配置jsp路徑的前綴和jsp路徑的後綴，就改爲
//modelAndView.setViewName("/WEB-INF/jsp/items/itemsList.jsp");
//上邊的路徑配置可以不再程序中指定jsp路徑的前綴和jsp路徑的後綴
modelAndView.setViewName("items/itemsList");
return modelAndView;
}

編寫jsp

itemsList.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"
contentType="text/html; charset=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">
<html>
<head>

<title>check list</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">


</head>

<body>
<form action="${pageContext.request.contextPath }/item/queryItem.action" method="post">
查詢條件：
<table width="100%" border=1>
<tr>
<td><input type="submit" value="查詢" /></td>
</tr>
</table>
商品列表：
<table width="100%" border=1>
<tr>
<td>商品名稱</td>
<td>商品價格</td>
<td>生產日期</td>
<td>商品描述</td>
<td>操作</td>
</tr>
<c:forEach items="${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="${pageContext.request.contextPath }/editItem.action?id=${item.id}">修改</a></td>
</tr>
</c:forEach>
</table>
</form>
</body>
</html>

=====================================================================================
加載spring容器
把dao、service、transaction
建議使用通配符加載上邊的配置文件
在web.xml添加spring容器監聽器，加載spring容器。
<?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>springmv_mybatis1208</display-name>


<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/classes/spring/applicationContext-*.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

SpringMVC和Mybatis （一）整合思路、整合dao、service、springmvc、加載spring

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