SSM整合
搭建整体环境
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SSM 整合可以使用多种方式,这选择XML+注解的方式
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整合的思路
- 先搭建整合的环境
- 先把 Spring 的配置搭建完成
- 再使用 Spring 整合 SpringMVC 框架
- 最后使用 Spring 整合 MyBatis 框架
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创建数据库和表结构
create database ssm; use ssm; create table account( id int primary key auto_increment, name varchar(20), money double );
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创建maven工程
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创建ssm_parent父工程(打包方式选择pom,必须的)
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创建ssm_web子模块(打包方式是war包)
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创建ssm_service子模块(打包方式是jar包)
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创建ssm_dao子模块(打包方式是jar包)
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创建ssm_domain子模块(打包方式是jar包)
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web依赖于service,service依赖于dao,dao依赖于domain
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在ssm_parent的pom.xml文件中引入坐标依赖
<properties> <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 --> <dependency> <groupId>org.aspectj</groupId> <artifactId>aspectjweaver</artifactId> <version>1.6.8</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>compile</scope> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- log start --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>${slf4j.version}</version> </dependency> <!-- log end --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.3.0</version> </dependency> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>0.9.1.2</version> <type>jar</type> <scope>compile</scope> </dependency> </dependencies> <build> <finalName>ssm</finalName> <pluginManagement> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.2</version> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> <showWarnings>true</showWarnings> </configuration> </plugin> </plugins> </pluginManagement> </build>
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部署
ssm_web
的项目,只要把ssm_web
项目加入到tomcat服务器中即可
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编写实体类,在ssm_domain项目中编写
public class Account implements Serializable{ private static final long serialVersionUID = 7355810572012650248L; private Integer id; private String name; private Double money; ……
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编写dao接口
public interface AccountDao { public void saveAccount(Account account); public List<Account> findAll(); }
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编写service接口和实现类
public interface AccountService { public void saveAccount(Account account); public List<Account> findAll(); } @Service("accountService") public class AccountServiceImpl implements AccountService { private AccountDao account; public void saveAccount(Account account) { } public List<Account> findAll() { System.out.println("业务层:查询所有账户..."); return null; } }
Spring框架代码的编写
搭建和测试Spring的开发环境
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在ssm_web项目中创建applicationContext.xml的配置文件,编写具体的配置信息。
<?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"> <!-- 开启注解扫描,要扫描的是service和dao层的注解,要忽略web层注解,因为web层让SpringMVC框架 去管理 --> <context:component-scan base-package="com.xuexi"> <!-- 配置要忽略的注解 --> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> </beans>
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在ssm_web项目中编写测试方法,进行测试
@Test public void run1() { ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml"); AccountService as = (AccountService) ac.getBean("accountService"); as.findAll(); }
Spring整合SpringMVC框架
搭建和测试SpringMVC的开发环境
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在web.xml中配置DispatcherServlet前端控制器
<!-- 配置前端控制器:服务器启动必须加载,需要加载springmvc.xml配置文件 --> <servlet> <servlet-name>dispatcherServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 配置初始化参数,创建完DispatcherServlet对象,加载springmvc.xml配置文件 --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <!-- 服务器启动的时候,让DispatcherServlet对象创建 --> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>dispatcherServlet</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping>
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在web.xml中配置DispatcherServlet过滤器解决中文乱码
<!-- 配置解决中文乱码的过滤器 --> <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>
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创建springmvc.xml的配置文件,编写配置文件
<?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"> <!-- 扫描controller的注解,别的不扫描 --> <context:component-scan base-package="com.xuexi.controller"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- 配置视图解析器 --> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <!-- JSP文件所在的目录 --> <property name="prefix" value="/WEB-INF/pages/" /> <!-- 文件的后缀名 --> <property name="suffix" value=".jsp" /> </bean> <!-- 设置静态资源不过滤 --> <mvc:resources location="/css/" mapping="/css/**" /> <mvc:resources location="/images/" mapping="/images/**" /> <mvc:resources location="/js/" mapping="/js/**" /> <!-- 开启对SpringMVC注解的支持 --> <mvc:annotation-driven /> </beans>
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测试SpringMVC的框架搭建是否成功
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编写index.jsp和list.jsp编写,超链接
<a href="account/findAll">查询所有</a>
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创建AccountController类,编写方法,进行测试
@Controller @RequestMapping("/account") public class AccountController { /** * 查询所有的数据 * @return */ @RequestMapping("/findAll") public String findAll() { System.out.println("表现层:查询所有账户..."); return "list"; } }
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Spring整合SpringMVC的框架
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目的:在controller中能成功的调用service对象中的方法。
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在项目启动的时候,就去加载applicationContext.xml的配置文件,在web.xml中配置ContextLoaderListener监听器(该监听器只能加载WEB-INF目录下的applicationContext.xml的配置文件)。
<!-- 配置Spring的监听器 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listenerclass> </listener> <!-- 配置加载类路径的配置文件 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param>
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在controller中注入service对象,调用service对象的方法进行测试
@Controller @RequestMapping("/account") public class AccountController { @Autowired private AccountService accoutService; /** * 查询所有的数据 * @return */ @RequestMapping("/findAll") public String findAll() { System.out.println("表现层:查询所有账户..."); accoutService.findAll(); return "list"; } }
Spring整合MyBatis框架
搭建和测试MyBatis的环境
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在web项目中编写SqlMapConfig.xml的配置文件,编写核心配置文件
<?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> <environments default="mysql"> <environment id="mysql"> <transactionManager type="JDBC"/> <dataSource type="POOLED"> <property name="driver" value="com.mysql.jdbc.Driver"/> <property name="url" value="jdbc:mysql:///ssm"/> <property name="username" value="root"/> <property name="password" value="root"/> </dataSource> </environment> </environments> <!-- 使用的是注解 --> <mappers> <!-- <mapper class="com.xuexi.dao.AccountDao"/> --> <!-- 该包下所有的dao接口都可以使用 --> <package name="com.xuexi.dao"/> </mappers> </configuration>
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在AccountDao接口的方法上添加注解,编写SQL语句
public interface AccountDao { @Insert(value="insert into account (name,money) values (#{name},#{money})") public void saveAccount(Account account); @Select("select * from account") public List<Account> findAll(); }
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编写测试的方法
@Test public void run1() throws Exception { // 加载配置文件 InputStream inputStream = Resources.getResourceAsStream("SqlMapConfig.xml"); // 创建工厂 SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(inputStream); // 创建sqlSession对象 SqlSession session = factory.openSession(); // 获取代理对象 AccountDao dao = session.getMapper(AccountDao.class); // 调用查询的方法 List<Account> list = dao.findAll(); for (Account account : list) { System.out.println(account); } // 释放资源 session.close(); inputStream.close(); } @Test public void run2() throws Exception { Account account = new Account(); account.setName("熊大"); account.setMoney(400d); // 加载配置文件 InputStream inputStream = Resources.getResourceAsStream("SqlMapConfig.xml"); // 创建工厂 SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(inputStream); // 创建sqlSession对象 SqlSession session = factory.openSession(); // 获取代理对象 AccountDao dao = session.getMapper(AccountDao.class); dao.saveAccount(account); // 提交事务 session.commit(); // 释放资源 session.close(); inputStream.close(); }
Spring整合MyBatis框架
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目的:把SqlMapConfig.xml配置文件中的内容配置到applicationContext.xml配置文件中
<!-- 配置C3P0的连接池对象 --> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="com.mysql.jdbc.Driver" /> <property name="url" value="jdbc:mysql:///ssm" /> <property name="username" value="root" /> <property name="password" value="root" /> </bean> <!-- 配置SqlSession的工厂 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 配置扫描dao的包 --> <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.xuexi.dao"/> </bean>
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在AccountDao接口中添加@Repository注解
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在service中注入dao对象,进行测试
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代码如下
@Repository public interface AccountDao { @Insert(value="insert into account (name,money) values (#{name},#{money})") public void saveAccount(Account account); @Select("select * from account") public List<Account> findAll(); } @Service("accountService") public class AccountServiceImpl implements AccountService { @Autowired private AccountDao accountDao; public void saveAccount(Account account) { } public List<Account> findAll() { System.out.println("业务层:查询所有账户..."); return accountDao.findAll(); } } @Controller @RequestMapping("/account") public class AccountController { @Autowired private AccountService accoutService; /** * 查询所有的数据 * @return */ @RequestMapping("/findAll") public String findAll() { System.out.println("表现层:查询所有账户..."); List<Account> list = accoutService.findAll(); for (Account account : list) { System.out.println(account); } return "list"; } }
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配置Spring的声明式事务管理
<!--配置Spring框架声明式事务管理--> <!--配置事务管理器--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!--配置事务通知--> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="find*" read-only="true"/> <tx:method name="*" isolation="DEFAULT"/> </tx:attributes> </tx:advice> <!--配置AOP增强--> <aop:config> <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.xuexi.service.impl.*ServiceImpl.*(..))"/> </aop:config>