2020-02-10

SSM整合-SpringMVC+Spring+Mybatis

SpringMVC第三天

第一章：搭建整合环境

1. 搭建整合环境

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
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

创建数据库和表结构

语句

create database ssm;
use ssm;
create table account(
	id int primary key auto_increment,
	name varchar(20),
	money double
)

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）

创建ssm_parent父工程（打包方式选择pom，必须的）
创建ssm_web子模块（打包方式是war包）
创建ssm_service子模块（打包方式是jar包）
创建ssm_dao子模块（打包方式是jar包）
创建ssm_domain子模块（打包方式是jar包）
web依赖于service，service依赖于dao，dao依赖于domain

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

编写实体类，在ssm_domain项目中编写

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;
    }
}

编写dao接口

import cn.itcast.domain.Account;

import java.util.List;


public interface AccountDao {
    public void saveAccount(Account account);

    public List<Account> findAll();
}

编写service接口和实现类


import java.util.List;
import cn.itcast.domain.Account;
public interface AccountService {
	public void saveAccount(Account account);
	public List<Account> findAll();
}




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;
		}
}

第二章：Spring框架代码的编写

搭建和测试Spring的开发环境

<?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>

在ssm_web项目中编写测试方法，进行测试

import cn.itcast.service.AccountService;

import org.junit.Test;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;


public class ServiceTest {
    @Test
    public void run1() {
        ApplicationContext ac = new ClassPathXmlApplicationContext(
                "classpath:applicationContext.xml");
        AccountService as = (AccountService) ac.getBean("accountService");
        as.findAll();
    }
}

第三章：Spring整合SpringMVC框架

1. 搭建和测试SpringMVC的开发环境

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>

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>

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>

测试SpringMVC的框架搭建是否成功

编写index.jsp和list.jsp编写，超链接
1
<a href="account/findAll">查询所有</a>

创建AccountController类，编写方法，进行测试

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";
    }
}

2. Spring整合SpringMVC的框架

目的：在controller中能成功的调用service对象中的方法。
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

<!-- 配置Spring的监听器,默认只加载WEB-INF目录下的applicationContext.xml配置文件 -->
<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>

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";
    }
}

第四章：Spring整合MyBatis框架

1. 搭建和测试MyBatis的环境

在web项目中编写SqlMapConfig.xml的配置文件，编写核心配置文件
在AccountDao接口的方法上添加注解，编写SQL语句
编写测试的方法

2. Spring整合MyBatis框架

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>

在AccountDao接口中添加@Repository注解
在service中注入dao对象，进行测试

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");
	}
}

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(* cn.itcast.service.impl.*ServiceImpl.*(..))"/>
</aop:config>