SpringMVC（三）— SSM框架整合

其他 2020-01-22 13:19:48 阅读次数: 0

搭建整合环境

搭建整合环境
  1. 整合说明：SSM整合可以使用多种方式，咱们会选择XML + 注解的方式
  2. 整合的思路
    1. 先搭建整合的环境
    2. 先把Spring的配置搭建完成
    3. 再使用Spring整合SpringMVC框架
    4. 最后使用Spring整合MyBatis框架
  3. 创建数据库和表结构
    1. 语句
	create database ssm;
	use ssm;
	create table account(
	id int primary key auto_increment,
	name varchar(20),
	money double
	);
  1. 创建maven的工程（今天会使用到工程的聚合和拆分的概念，这个技术maven高级会讲）
    1. 创建ssm_parent父工程（打包方式选择pom，必须的）
    2. 创建ssm_web子模块（打包方式是war包）
    3. 创建ssm_service子模块（打包方式是jar包）
    4. 创建ssm_dao子模块（打包方式是jar包）
    5. 创建ssm_domain子模块（打包方式是jar包）
    6. web依赖于service，service依赖于dao，dao依赖于domain
    7. 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>

部署ssm_web的项目，只要把ssm_web项目加入到tomcat服务器中即可
5. 编写实体类，在ssm_domain项目中编写

package cn.itcast.domain;
import java.io.Serializable;

	public class Account implements Serializable{
		private static final long serialVersionUID = 7355810572012650248L;
		private Integer id;
		private String name;
		private Double money;
		
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Double getMoney() {
		return money;
	}
	public void setMoney(Double money) {
		this.money = money;
	}
}
  1. 编写dao接口
package cn.itcast.dao;
import java.util.List;
import cn.itcast.domain.Account;
	public interface AccountDao {
		public void saveAccount(Account account);
		public List<Account> findAll();
	}
  1. 编写service接口和实现类
package cn.itcast.service;
import java.util.List;
import cn.itcast.domain.Account;
public interface AccountService {
	public void saveAccount(Account account);
	public List<Account> findAll();
	}

package cn.itcast.service.impl;
import java.util.List;
import org.springframework.stereotype.Service;
import cn.itcast.dao.AccountDao;
import cn.itcast.domain.Account;
import cn.itcast.service.AccountService;
@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
  1. 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="cn.itcast">
	<!-- 配置要忽略的注解 -->
	<context:exclude-filter type="annotation"
	expression="org.springframework.stereotype.Controller"/>
	</context:component-scan>
	</beans>
  1. 在ssm_web项目中编写测试方法，进行测试
package cn.itcast.test;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import cn.itcast.service.AccountService;
public class ServiceTest {
	@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
  1. 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>
  1. 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>
  1. 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="cn.itcast">
		<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>
  1. 测试SpringMVC的框架搭建是否成功
    1. 编写index.jsp和list.jsp编写，超链接
<a href="account/findAll">查询所有</a>
  1. 创建AccountController类，编写方法，进行测试
package cn.itcast.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@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";
	}
}

Spring整合SpringMVC的框架

  1. 目的：在controller中能成功的调用service对象中的方法。
  2. 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>
  1. 在controller中注入service对象，调用service对象的方法进行测试
package cn.itcast.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import cn.itcast.service.AccountService;
@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

  1. 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="cn.itcast.dao.AccountDao"/> -->
			<!-- 该包下所有的dao接口都可以使用 -->
			<package name="cn.itcast.dao"/>
		</mappers>
	</configuration>
  1. 在AccountDao接口的方法上添加注解，编写SQL语句
package cn.itcast.dao;
import java.util.List;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import cn.itcast.domain.Account;
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();
}
  1. 编写测试的方法
package cn.itcast.test;
import java.io.InputStream;
import java.util.List;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Test;
import cn.itcast.dao.AccountDao;
import cn.itcast.domain.Account;
public class Demo1 {
	@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

  1. 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="cn.itcast.dao"/>
</bean>
  1. 在AccountDao接口中添加@Repository注解
  2. 在service中注入dao对象，进行测试
  3. 代码如下
package cn.itcast.dao;
import java.util.List;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.springframework.stereotype.Repository;
import cn.itcast.domain.Account;
@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();
	}
	
package cn.itcast.service.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import cn.itcast.dao.AccountDao;
import cn.itcast.domain.Account;
import cn.itcast.service.AccountService;
@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();
	}
}
package cn.itcast.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import cn.itcast.domain.Account;
import cn.itcast.service.AccountService;
@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";
	}
}
  1. 配置Spring的声明式事务管理
<!-- 配置事务管理器 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> 
<property name="dataSource" ref="dataSource">
</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.itheima.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>
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