（代码每步加注释）整合Spring和SpringMVC

每天分享技术栈，开发工具等​​二话不说开干​​

SSM = ​​Spr​​ing​​+​​SpringMVC​​+​​Myatis​​

SSM = ​​Spring​​+​​SpringMVC​​+​​Mybatis​​= （​​Spring​​+​​Mybatis​​）+​​SpringMVC​​

​​先整合​​Spring​​+Mybatis​​

​​然后再整合​​SpringMVC​​

（具体pom坐标和其他方法在上一篇​​​​​传送门​​走你​​​​​​​​​）

​​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>

​​保证MyBatis框架在web工程中独立运行​​第一步：编写AccountDao映射配置文件​​

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

​​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/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

​​第三步：测试运行结果​​

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 * 
     */
    @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();
    }
}

​​
​​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​

​​第一步：Spring接管MyBatis的Session工厂​​

<!-- 加载配置文件 -->

</bean>

<!-- 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>

​
​​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.dao"/>
    </bean>

​​
​​​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.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>

​​
​​​第四步：测试整合结果​​

/**
 * 测试spring整合mybatis 
 */
@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);
    }
}

​​测试SSM整合结果​​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>

​​
​​​修改控制器中的方法

/**
 * 账户的控制器 
 */
@Controller("accountController")
@RequestMapping("/account")
public class AccountController {
    @Autowired
    private IAccountService accountService;

    /**
     * 查询所有账户 
     */
    @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 
     */
    @RequestMapping("/saveAccount")
    public String saveAccount(Account account) {
        accountService.saveAccount(account);
        return "redirect:findAllAccount";
    }
}

​​
​​测试运行结果

​​Spring框架中的SpringMVC案例及小点解释 (一)2020-11-11 ​​

​​究竟怎么用Restful风格编代码必看这篇。（二）2020-11-12 ​​

​​Spring 自定义注解玩法大全，从入门到…2020-11-13 ​​

​​中招了？最流行的 RESTful API 要怎么设计？2020-11-14 ​​

​​14 个 Spring MVC 顶级技巧，随时用随时爽，一直用一直爽2020-11-16 ​​

​​自定义拦截器的使用和SSM整合(每步详细步骤)2020-11-17 ​​

END
如果看到这里，说明你喜欢这篇文章，请 转发、点赞。同时 本公众号可以第一时间接受到博文推送。