SSM08 —— SSM整合

2022-04-19

SSM

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本文记录了SSM框架的原始整合方式，mybatis整合spring，声明式事务控制实现

原始方式整合

示例account表：

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

创建Maven工程
导入Maven坐标

编写实体类

public class Account {

    private Integer id;
    private String name;
    private Double money;
}

编写Mapper接口

public interface AccountMapper {
	//保存账户数据
    public void save(Account account);
	//查询账户数据
    public List<Account> findAll();

}

编写Service接口

public interface AccountService {
	//保存账户数据
    public void save(Account account);
	//查询账户数据
    public List<Account> findAll();

}

编写Service接口实现

@Service("accountService")
public class AccountServiceImpl implements AccountService {
	public void save(Account account) {
	SqlSession sqlSession = MyBatisUtils.openSession();
	AccountMapper accountMapper = sqlSession.getMapper(AccountMapper.class);
	accountMapper.save(account);
	sqlSession.commit();
	sqlSession.close();
}
public List<Account> findAll() {
	SqlSession sqlSession = MyBatisUtils.openSession();
	AccountMapper accountMapper = sqlSession.getMapper(AccountMapper.class);
	return accountMapper.findAll();
	} 
}

编写Controller

@Controller
@RequestMapping("/account")
public class AccountController {

    @Autowired
    private AccountService accountService;

    //保存
    @RequestMapping(value = "/save",produces = "text/html;charset=UTF-8")
    @ResponseBody
    public String save(Account account){
        accountService.save(account);
        return "保存成功";
    }

    //查询
    @RequestMapping("/findAll")
    public ModelAndView findAll(){
        List<Account> accountList = accountService.findAll();
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("accountList",accountList);
        modelAndView.setViewName("accountList");
        return modelAndView;
    }

}

编写添加页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <h1>添加账户信息表单</h1>
    <form name="accountForm" action="${pageContext.request.contextPath}/account/save" 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"><br>
    </form>
</body>
</html>

编写列表页面

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
    <h1>展示账户数据列表</h1>
    <table border="1">
        <tr>
            <th>账户id</th>
            <th>账户名称</th>
            <th>账户金额</th>
        </tr>

        <c:forEach items="${accountList}" var="account">
            <tr>
                <td>${account.id}</td>
                <td>${account.name}</td>
                <td>${account.money}</td>
            </tr>
        </c:forEach>

    </table>
</body>
</html>

编写相应配置文件
- Spring配置文件：applicationContext.xml
- SprngMVC配置文件：spring-mvc.xml
- MyBatis映射文件：AccountMapper.xml
- MyBatis核心文件：sqlMapConfig.xml
- 数据库连接信息文件：jdbc.properties
- Web.xml文件：web.xml
- 日志文件：log4j.xml
测试添加账户
测试账户列表

Spring整合MyBatis

整合思路

将SqlSessionFactory配置到Spring容器中

<!--加载properties文件-->
<context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>

<!--配置数据源信息-->
<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>

<!--配置sessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"></property>
    <!--加载mybatis核心文件-->
    <property name="configLocation" value="classpath:sqlMapConfig-spring.xml"></property>
</bean>

扫描Mapper，让Spring容器产生Mapper实现类

<!--扫描mapper所在的包 为mapper创建实现类-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="com.itheima.mapper"></property>
</bean>

配置声明式事务控制

<!--声明式事务控制-->
<!--平台事务管理器-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"></property>
</bean>

<!--配置事务增强-->
<tx:advice id="txAdvice">
    <tx:attributes>
        <tx:method name="*"/>
    </tx:attributes>
</tx:advice>

<!--事务的aop织入-->
<aop:config>
    <aop:advisor advice-ref="txAdvice" pointcut="execution(* com.itheima.service.impl.*.*(..))"></aop:advisor>
</aop:config>

修改Service实现类代码

@Service("accountService")
public class AccountServiceImpl implements AccountService {

    @Autowired
    private AccountMapper accountMapper;

    @Override
    public void save(Account account) {
        accountMapper.save(account);
    }

    @Override
    public List<Account> findAll() {
        return accountMapper.findAll();
    }
}

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