SSM环境搭建
1. 通过Maven创建一个javaWeb工程
src目录结构: -main -java -controller -entity -dao -service -resource -mapper applicationContext.xml log4j.properties springmvc.xml -webapp -static -WEB-INF -view web.xml -test
2. 导入ssm框架所需jar包坐标
<properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <!-- 版本锁定 --> <spring.version>5.0.2.RELEASE</spring.version> <slf4j.version>1.6.6</slf4j.version> <log4j.version>1.2.12</log4j.version> <mysql.version>5.1.6</mysql.version> <mybatis.version>3.4.5</mybatis.version> </properties> <dependencies> <!-- spring --> <!-- springAOP所需jar包 --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.6.8</version> </dependency> <!-- springAOP所需jar包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <!-- 为Spring核心提供了大量扩展。 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <!-- spring开发web应用所需jar包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <!-- springMVC框架所需jar包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <!-- spring整合junit测试所需jar包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <!-- spring事务支持所需jar包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <!-- spring对jdbc进行的简单封装 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <!-- 单元测试 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <!-- mysql数据库 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <!-- Servlet --> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> <!-- JSP --> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.0</version> <scope>provided</scope> </dependency> <!-- jstl表达式 --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- 日志相关 --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <!-- 日志相关 --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j.version}</version> </dependency> <!-- 日志相关 --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> </dependency> <!-- mybatis框架所需jar包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <!-- spring整合mybatis所需jar包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.0</version> </dependency> <!-- druid连接池 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.0.15</version> <scope>compile</scope> </dependency> </dependencies>
3. 搭建Spring框架环境
① 创建spring配置文件——applicationContext.xml
② 补全applicationContext.xml文件头约束条件
<?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" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
③ 开启注解扫描(dao+service)
<!-- 开启注解扫描,dao层和service层交给spring管理 --> <!-- *:补全项目的目录结构 --> <context:component-scan base-package="com.*.dao" /> <context:component-scan base-package="com.*.service" />
4. 搭建SpringMVC环境
① 创建springMVC配置文件——springmvc.xml
② 补全springmvc.xml文件头约束条件
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" 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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
③ 开启注解扫描(controller)
<!-- 开启注解扫描,controller层交给springMVC管理 --> <!-- *:补全项目的目录结构 --> <context:component-scan base-package="com.*.controller" />
④ 配置视图解析器
<!-- 配置视图解析器 --> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/view/" /> <property name="suffix" value=".jsp"/> </bean>
⑤ 配置过滤静态资源
<!-- 过滤静态资源(也可以在web.xml文件中配置) --> <mvc:resources mapping="/static/**" location="/static/"/>
⑤ 开启springMVC注解支持
<!-- 开启springMVC注解支持 --> <mvc:annotation-driven/>
⑥ 配置web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0"> <display-name>Archetype Created Web Application</display-name> <!-- 配置springMVC前端控制器 --> <servlet> <servlet-name>dispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 配置初始化 springMVC的配置文件 --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <!-- 配置servlet启动时加载对象 --> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <!-- 配置解决中文乱码问题 --> <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> </filter> <filter-mapping> <filter-name>characterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <!-- 放行静态资源(springmvc.xml文件中已经配置过了)--> <!-- <servlet-mapping>--> <!-- <servlet-name>default</servlet-name>--> <!-- <url-pattern>/static/*</url-pattern>--> <!-- </servlet-mapping>--> </web-app>
5. spring整合springMVC框架
web.xml文件中配置spring监听器
<!-- 配置Spring的监听器 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 设置spring配置文件的路径 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param>
6. spring整合mybatis框架
位置:applicationContext.xml
① 配置连接池(druid)
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql:///数据库名称?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull" /> <property name="username" value="用户名" /> <property name="password" value="密码" /> <!-- 属性类型是字符串,通过别名的方式配置扩展插件,常用的插件有: 监控统计用的filter:stat日志用的filter:log4j防御sql注入的filter:wall --> <property name="filters" value="stat"/> <!-- 最大连接池数量 --> <property name="maxActive" value="100"/> <!-- 初始化时建立物理连接的个数。初始化发生在显示调用init方法,或者第一次getConnection时 --> <property name="initialSize" value="1"/> <!-- 获取连接时最大等待时间,单位毫秒。配置了maxWait之后, 缺省启用公平锁,并发效率会有所下降,如果需要可以通过配置useUnfairLock属性为true使用非公平锁。 --> <property name="maxWait" value="60000"/> <!-- 最小连接池数量 --> <property name="minIdle" value="1"/> <!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 --> <property name="timeBetweenEvictionRunsMillis" value="60000"/> <!-- 配置一个连接在池中最小生存的时间,单位是毫秒 --> <property name="minEvictableIdleTimeMillis" value="300000"/> <!-- 用来检测连接是否有效的sql,要求是一个查询语句。 如果validationQuery为null,testOnBorrow、testOnReturn、testWhileIdle都不会其作用。 --> <property name="validationQuery" value="SELECT ‘x‘"/> <!-- 建议配置为true,不影响性能,并且保证安全性。申请连接的时候检测, 如果空闲时间大于timeBetweenEvictionRunsMillis,执行validationQuery检测连接是否有效 --> <property name="testWhileIdle" value="true"/> <!-- 申请连接时执行validationQuery检测连接是否有效,做了这个配置会降低性能 --> <property name="testOnBorrow" value="false"/> <!-- 归还连接时执行validationQuery检测连接是否有效,做了这个配置会降低性能 --> <property name="testOnReturn" value="false"/> </bean>
② 配置SqlSessionFactory工厂
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!--自动扫描mapper目录下的映射文件--> <property name="mapperLocations" value="classpath:mapper/*.xml" /> </bean>
③ 配置dao接口所在的包
<!-- *:补全项目的目录结构 --> <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.*.dao" /> </bean>
7. 配置spring事务管理
位置:applicationContext.xml
① 配置事务管理器
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean>
② 配置事务通知
<tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <!-- *配置所有文件都一定有事务 --> <tx:method name="*" propagation="REQUIRED" read-only="false"/> <!-- 查询方法不用有事务 --> <tx:method name="find*" propagation="SUPPORTS" read-only="true"/> </tx:attributes> </tx:advice>
③ 配置aop切点表达式
<aop:config> <!-- 配置到业务层实现类包 --> <aop:pointcut id="pot" expression="execution(* com.*.service.impl.*.*(..))"/> <!--建立切入点表达式和事务通知的对应关系 --> <aop:advisor advice-ref="txAdvice" pointcut-ref="pot"/> </aop:config>