SpringMVC知识总结（五）：SSM整合

一： SSM 整合

1.1环境准备

1.1.1 创建数据库和表结构

create database ssm;

create table account(
	id int primary key auto_increment,
	name varchar(100),
	money double(7,2),
);

1.1.2 创建 Maven 工程

创建父工程和子模块：
ssm_domain jar
ssm_dao jar
ssm_service jar
ssm_web war

1.1.3 导入坐标并建立依赖

注意 MyBatis 和 Spring 的版本对应关系：

<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.zt</groupId>
	<artifactId>ssm</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>pom</packaging>
	
	<properties>
		<spring.version>5.0.2.RELEASE</spring.version>
		<slf4j.version>1.6.6</slf4j.version>
		<log4j.version>1.2.12</log4j.version>
		<shiro.version>1.2.3</shiro.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-context-support</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-orm</artifactId>
			<version>${spring.version}</version>
		</dependency>
		
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-beans</artifactId>
			<version>${spring.version}</version>
		</dependency>
		
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</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-webmvc</artifactId>
			<version>${spring.version}</version>
		</dependency>
		
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-tx</artifactId>
			<version>${spring.version}</version>
		</dependency>
		
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.12</version>
			<scope>test</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>
	
	<modules>
		<module>ssm_domain</module>
		<module>ssm_dao</module>
		<module>ssm_service</module>
		<module>ssm_web</module>
	</modules>
</project>

1.1.4 编写实体类

```java
/**
* 账户的实体类
* @Version 1.0
*/
public class Account implements Serializable {
	private Integer id;
	private String name;
	private Float money;
	//getter setter
	@Override
	public String toString() {
		return "Account [id=" + id + ", name=" + name + ", money=" + money + "]";
	}
}

1.1.5 编写业务层接口

/**
* 账户的业务层接口
* @Version 1.0
*/
public interface IAccountService {
	/**
	* 保存账户
	* @param account
	*/
	void saveAccount(Account account);
	/**
	* 查询所有账户
	* @return
	*/
	List<Account> findAllAccount();
}

1.1.6 编写持久层接口

/**
* 账户的持久层接口
* @Version 1.0
*/
public interface IAccountDao {
	/**
	* 保存
	* @param account
	*/
	void save(Account account);
	/**
	* 查询所有
	* @return
	*/
	List<Account> findAll();
}

1.2整合步骤

1.2.1 保证 Spring 框架在 web 工程中独立运行

1.2.1.1 第一步：编写 spring 配置文件并导入约束

<?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:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans.xsd
	http://www.springframework.org/schema/tx
	http://www.springframework.org/schema/tx/spring-tx.xsd
	http://www.springframework.org/schema/aop
	http://www.springframework.org/schema/aop/spring-aop.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context.xsd">
	
	<!-- 配置 spring 创建容器时要扫描的包 -->
	<context:component-scan base-package="com.zt">
		<!--制定扫包规则，不扫描@Controller 注解的 JAVA 类，其他的还是要扫描 -->
		<context:exclude-filter type="annotation"	expression="org.springframework.stereotype.Controller" />
	</context:component-scan>
</beans>

1.2.1.2 第二步： 使用注解配置业务层和持久层

/**
* 账户的业务层实现类
*/
@Service("accountService")
public class AccountServiceImpl implements IAccountService {
	@Autowired
	private IAccountDao accountDao;
	
	@Override
	public List<Account> findAllAccount() {
		return accountDao.findAllAccount();
	}
	
	@Override
	public void saveAccount(Account account) {
		accountDao.saveAccount
	}
}

持久层实现类代码：
此时不要做任何操作，就输出一句话。目的是测试 spring 框架搭建的结果。

/**
* 账户的持久层实现类
*/
@Repository("accountDao")
public class AccountDaoImpl implements IAccountDao {
	@Override
	public List<Account> findAllAccount() {
		System.out.println("查询了所有账户");
		return null;
	}
	
	 @Override
	public void saveAccount(Account account) {
		System.out.println("保存了账户");
	}
}

1.2.1.3 第三步：测试 spring 能否独立运行

/**
* 测试 spring 环境搭建是否成功
* @Version 1.0
*/
public class Test01Spring {
	public static void main(String[] args) {
		ApplicationContext ac = new
		ClassPathXmlApplicationContext("applicationContext.xml");
		IAccountService as = ac.getBean("accountService",IAccountService.class);
		as.findAllAccount();
	}
}

运行结果：

1.2.2 保证 SpringMVC 在 web 工程中独立运行

1.2.2.1 第一步： 在 web.xml 中配置核心控制器（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"
	version="2.5">
	
	<display-name>ssm_web</display-name>
	
	<!-- 配置 spring mvc 的核心控制器 -->
	<servlet>
		<servlet-name>springmvcDispatcherServlet</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<!-- 配置初始化参数，用于读取 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 的对象的创建时间点：应用加载时创建。取值只能是非 0 正整数，表示启动顺序 -->
		<load-on-startup>1</load-on-startup>
	</servlet>
	
	<servlet-mapping>
		<servlet-name>springmvcDispatcherServlet</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	
	<!-- 配置 springMVC 编码过滤器 -->
	<filter>
		<filter-name>CharacterEncodingFilter</filter-name>
		<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
		<!-- 设置过滤器中的属性值 -->
		<init-param>
			<param-name>encoding</param-name>
			<param-value>UTF-8</param-value>
		</init-param>
		
		<!-- 启动过滤器 -->
		<init-param>
			<param-name>forceEncoding</param-name>
			<param-value>true</param-value>
		</init-param>
	</filter>
	
	<!-- 过滤所有请求 -->
	<filter-mapping>
		<filter-name>CharacterEncodingFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-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>

1.2.2.2 第二步： 编写 SpringMVC 的配置文件

<?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">

	<!-- 配置创建 spring 容器要扫描的包 -->
	<context:component-scan base-package="com.zt">
		<!-- 制定扫包规则 ,只扫描使用@Controller 注解的 JAVA 类 -->
		<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller" />
	</context:component-scan>
	
	<!-- 配置视图解析器 -->
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/pages/"></property>
		<property name="suffix" value=".jsp"></property>
	</bean>
	
	<mvc:annotation-driven></mvc:annotation-driven>
</beans>

1.2.2.3 第三步：编写 Controller 和 jsp 页面

jsp 代码：

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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>主页</title>
	</head>
	<body>
		<a href="account/findAllAccount">访问查询账户</a>
	</body>
</html>

控制器代码：

/**
* 账户的控制器
* @Version 1.0
*/
@Controller("accountController")
@RequestMapping("/account")
public class AccountController {
	@RequestMapping("/findAllAccount")
	public String findAllAccount() {
		System.out.println("执行了查询账户");
		return "success";
	}
}

运行结果：

1.2.3 整合 Spring 和 SpringMVC

1.2.3.1 第一步：配置监听器实现启动服务创建容器

<!-- 配置 spring 提供的监听器，用于启动服务时加载容器 。
该间监听器只能加载 WEB-INF 目录中名称为 applicationContext.xml 的配置文件 -->
<listener>
	<listener-class>
		org.springframework.web.context.ContextLoaderListener
	</listener-class>
</listener>
<!-- 手动指定 spring 配置文件位置 -->
<context-param>
	<param-name>contextConfigLocation</param-name>
	<param-value>classpath:applicationContext.xml</param-value>
</context-param>

1.2.4 保证 MyBatis 框架在 web 工程中独立运行

1.2.4.1 第一步：编写 AccountDao 映射配置文件

注意： 我们使用代理 dao 的方式来操作持久层，所以此处 Dao 的实现类就是多余的了。

<?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="com.zt.dao.IAccountDao">
	<!-- 查询所有账户 -->
	<select id="findAll" resultType="com.zt.domain.Account">
		select * from account
	</select>
	
	<!-- 新增账户 -->
	<insert id="save" parameterType="com.zt.domain.Account">
		insert into account(name,money) values(#{name},#{money});
	</insert>
</mapper>

1.2.4.2 第二步：编写 SqlMapConfig 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>
	<properties resource="jdbcConfig.properties"></properties>
	
	<environments default="mysql">
		<environment id="mysql">
			<transactionManager type="JDBC"></transactionManager>
			<dataSource type="pooled">
				<property name="driver" value="${jdbc.driver}"/>
				<property name="url" value="${jdbc.url}"/>
				<property name="username" value="${jdbc.username}"/>
				<property name="password" value="${jdbc.password}"/>
			</dataSource>
		</environment>
	</environments>
	<mappers>
		<mapper resource="com/zt/dao/AccountDao.xml"/>
	</mappers>
</configuration>

properties 文件中的内容：

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ssm
jdbc.username=root
jdbc.password=1234

1.2.4.3 第三步：测试运行结果

测试类代码：

/**
* 测试 MyBatis 独立使用
* @Version 1.0
*/
public class Test02MyBatis {
	/**
	* 测试保存
	* @param args
	* @throws Exception
	*/
	@Test
	public void testSave() throws Exception {
		Account account = new Account();
		account.setName("test");
		account.setMoney(5000f);
		InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
		SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
		SqlSession session= factory.openSession();
		IAccountDao aDao = session.getMapper(IAccountDao.class);
		aDao.save(account);
		session.commit();
		session.close();
		in.close();
	}
	
	/**
	* 测试查询
	* @param args
	* @throws Exception
	*/
	@Test
	public void testFindAll() throws Exception{
		InputStream in = Resources.getResourceAsStream("SqlMapConfig.xml");
		SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(in);
		SqlSession session= factory.openSession();
		IAccountDao aDao = session.getMapper(IAccountDao.class);
		List<Account> list = aDao.findAll();
		System.out.println(list);
		session.close();
		in.close();
	}
}

1.2.5 整合 Spring 和 MyBatis

整合思路：
把 mybatis 配置文件（SqlMapConfig.xml）中内容配置到 spring 配置文件中
同时，把 mybatis 配置文件的内容清掉。

<?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>
</configuration>

注意：
由于我们使用的是代理 Dao 的模式， Dao 具体实现类由 MyBatis 使用代理方式创建，所以此时 mybatis配置文件不能删。

当我们整合 spring 和 mybatis 时， mybatis 创建的 Mapper.xml 文件名必须和 Dao 接口文件名一致

1.2.5.1 第一步： Spring 接管 MyBatis 的 Session 工厂

<!-- 加载配置文件 -->
<context:property-placeholder location="classpath:jdbcConfig.properties" />

<!-- 配置 MyBatis 的 Session 工厂 -->
<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:SqlMapConfig.xml" />
</bean>

<!-- 配置数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
	<property name="driverClass" value="${jdbc.driver}"></property>
	<property name="jdbcUrl" value="${jdbc.url}"></property>
	<property name="user" value="${jdbc.username}"></property>
	<property name="password" value="${jdbc.password}"></property>
</bean>

1.2.5.2 第二步：配置自动扫描所有 Mapper 接口和文件

<!-- 配置 Mapper 扫描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
	<property name="basePackage" value="com.zt.dao"/>
</bean>

1.2.5.3 第三步：配置 spring 的事务

<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
	<property name="dataSource" ref="dataSource"></property>
</bean>

<!-- 配置事务的通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
	<tx:attributes>
		<tx:method name="*" propagation="REQUIRED" read-only="false"/>
		<tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
	</tx:attributes>
</tx:advice>

<!-- 配置 aop -->
<aop:config>
	<!-- 配置切入点表达式 -->
	<aop:pointcut expression="execution(* com.zt.service.impl.*.*(..))"
	id="pt1"/>
	<!-- 建立通知和切入点表达式的关系 -->
	<aop:advisor advice-ref="txAdvice" pointcut-ref="pt1"/>
</aop:config>

1.2.5.4 第三步：测试整合结果

/**
* 测试 spring 整合 mybatis
* @Version 1.0
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations= {"classpath:applicationContext.xml"})
public class Test03SpringMabatis {
	@Autowired
	private IAccountService accountService;
	
	@Test
	public void testFindAll() {
		List list = accountService.findAllAccount();
		System.out.println(list);
	}
	
	@Test
	public void testSave() {
		Account account = new Account();
		account.setName("测试账号");
		account.setMoney(1234f);
		accountService.saveAccount(account);
	}
}

1.2.6 测试 SSM 整合结果

1.2.6.1 编写测试 jsp

请求发起页面：

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!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>主页</title>
</head>
<body>
<a href="account/findAllAccount">访问查询账户</a>
<hr/>
<form action="account/saveAccount" method="post">
账户名称： <input type="text" name="name"/><br/>
账户金额： <input type="text" name="money"><br/>
<input type="submit" value="保存"/>
</form>
</body>
</html>
响应结果页面：
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
	<!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>账户的列表页面</title>
	</head>
	<body>
		<table border="1" width="300px">
			<tr>
				<th>编号</th>
				<th>账户名称</th>
				<th>账户金额</th>
			</tr>
			<c:forEach items="${accounts}" var="account" varStatus="vs">
			<tr>
				<td>${vs.count}</td>
				<td>${account.name }</td>
				<td>${account.money }</td>
			</tr>
			
			</c:forEach>
		</table>
	</body>
</html>

1.2.6.2 修改控制器中的方法

/**
* 账户的控制器
* @Version 1.0
*/
@Controller("accountController")
@RequestMapping("/account")
public class AccountController {
	@Autowired
	private IAccountService accountService;
	
	/**
	* 查询所有账户
	* @return
	*/
	@RequestMapping("/findAllAccount")
	public ModelAndView findAllAccount() {
		List<Account> accounts = accountService.findAllAccount();
		ModelAndView mv = new ModelAndView();
		mv.addObject("accounts", accounts);
		mv.setViewName("accountlist");
		return mv;
	}
	
	/**
	* 保存账户
	* @param account
	* @return
	*/
	@RequestMapping("/saveAccount")
	public String saveAccount(Account account) {
		accountService.saveAccount(account);
		return "redirect:findAllAccount";
	}
}