1.SSM框架的整合
2.2 后台系统所用的技术
框架:Spring + SpringMVC + Mybatis
前端:EasyUI
数据库:mysql
1.2 创建数据库
1、安装mysql数据库
2、在mysql中创建一个taotao数据库
3、导入数据库脚本。
2.3 Mybatis逆向工程
执行逆向工程
使用官方网站的mapper自动生成工具mybatis-generator-core-1.3.2来生成po类和mapper映射文件。
2.4 整合思路
1、Dao层:
mybatis整合spring,通过spring管理SqlSessionFactory、mapper代理对象。需要mybatis和spring的整合包。
整合内容 | 对应工程 |
---|---|
Pojo | Taotao-mangaer-pojo |
Mapper映射文件 | Taotao-mangaer-mapper |
Mapper接口 | Taotao-mangaer-mapper |
sqlmapConfig.xml | Taotao-manager-web |
applicationContext-dao.xml | Taotao-manager-web |
2、Service层:
所有的实现类都放到spring容器中管理。由spring创建数据库连接池,并有spring管理实务。
整合内容 | 对应工程 |
---|---|
Service接口及实现类 | Taotao-mangaer-service |
applicationContext-service.xml | Taotao-manager-web |
applicationContext-trans.xml | Taotao-manager-web |
3、表现层:
Springmvc整合spring框架,由springmvc管理controller
整合内容 对应工程
springmvc.xml Taotao-manager-web
Controller Taotao-manager-web
注意
:
- 1.父子容器对整合spring,springmvc和mybatis的要求
- 2.springmvc.xml的职责是将Controller注解的实体,视图解析器,文件上传解析器等加入容器
- 3.spring-dao.xml,spring-service.xml的职责是将Service和Repository注解的实体加入容器
2.5 Dao整合
2.5.1 创建SqlMapConfig.xml配置文件
<?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>
//可以配置分页插件
</configuration>
xml文件作用:定义文件的版本号和编码格式
dtd文件作用:代码提示蓝本和验证代码编写的合法性
2.5.2 Spring整合mybatis
创建applicationContext-dao.xml
<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">
<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:properties/*.properties" />
<!-- 数据库连接池 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
destroy-method="close">
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="driverClassName" value="${jdbc.driver}" />
<property name="maxActive" value="10" />
<property name="minIdle" value="5" />
</bean>
<!-- 让spring管理sqlsessionfactory 使用mybatis和spring整合包中的 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 数据库连接池 -->
<property name="dataSource" ref="dataSource" />
<!-- 加载mybatis的全局配置文件 -->
<property name="configLocation" value="classpath:mybatis/SqlMapConfig.xml" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.taotao.mapper" />
</bean>
</beans>
1.xmlns的作用:在文档中定义一个或多个可供选择的命名空间
2.spring中bean的注入方式:
- 基于xml:
- 1.属性注入
- 2.构造器注入
- 3.工厂方法注入
- 静态工厂
- 非静态工厂
- 基于注解
- 基于Config
3.如何获取xml中的bean对象:
ClassPathXmlApplicationContext cxt = new ClassPathXmlApplicationContext("applicationContext.xml");
//获得内容 --不需要自己new,都是从spring容器获得
BookDao bookDao = (BookDao) cxt.getBean("bookDao");
dp.properties存放数据库的连接信息,最好配置serverTimezone,不然可能出现连接异常,对于mysql8,driver已改为com.mysql.cj.jdbc.Driver
,不过就算没有.cj
,idea也会自动帮我们转换成mysql8的驱动类型
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc:mysql://localhost:3306/taotao?characterEncoding=utf-8&serverTimezone=GMT
jdbc.username=root
jdbc.password=root
备注:
Druid是目前最好的数据库连接池,在功能、性能、扩展性方面,都超过其他数据库连接池,包括DBCP、C3P0、BoneCP、Proxool、JBoss DataSource
2.6 Service整合
2.6.1 管理Service实现类
applicationContext-service.xml扫描service包下的实现类
<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:component-scan base-package="com.taotao.service"/>
</beans>
2.6.2 事务管理
applicationContext-trans.xml
<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">
<!-- 事务管理器 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!-- 数据源 -->
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<!-- 传播行为 -->
<tx:method name="save*" propagation="REQUIRED" />
<tx:method name="insert*" propagation="REQUIRED" />
<tx:method name="add*" propagation="REQUIRED" />
<tx:method name="create*" 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="select*" propagation="SUPPORTS" read-only="true" />
<tx:method name="get*" propagation="SUPPORTS" read-only="true" />
</tx:attributes>
</tx:advice>
<!-- 切面 -->
<aop:config>
<aop:advisor advice-ref="txAdvice"
pointcut="execution(* com.taotao.service.*.*(..))" />
</aop:config>
</beans>
2.7 表现层总结
2.7.1 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.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.xsd">
//向子容器中加入controller注解后的实体
<context:component-scan base-package="com.taotao.controller" />
<mvc:annotation-driven />
//注入视图解析器
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
2.7.2 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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
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>taotao-manager-web</display-name>
<welcome-file-list>
<welcome-file>login.html</welcome-file>
</welcome-file-list>
<!-- 加载spring容器,父容器 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/applicationContext*.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- 解决post乱码 -->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
<!-- <init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param> -->
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- springmvc的前端控制器,子容器 -->
<servlet>
<servlet-name>taotao-manager</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- contextConfigLocation不是必须的, 如果不配置contextConfigLocation, springmvc的配置文件默认在:WEB-INF/servlet的name+"-servlet.xml" -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/springmvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>taotao-manager</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
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