SSM框架

最新推荐文章于 2024-12-02 09:14:44 发布

别捏琪琪脸-

最新推荐文章于 2024-12-02 09:14:44 发布

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文章标签： MMS 框架

本文链接：https://blog.youkuaiyun.com/m0_45319450/article/details/101451260

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本文详细介绍如何在项目中引入并配置SSM框架，包括MyBatis、SpringMVC、Spring和C3p0等依赖，以及如何进行数据源、事务管理和映射扫描的配置。同时，展示了具体的代码示例，如applicationContext.xml和web.xml的配置，以及如何在service.impl中引用映射层mapper和在controller中引用业务层service。

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引入依赖

 <!--MyBatis的依赖-->
<dependency>
  <groupId>org.mybatis</groupId>
  <artifactId>mybatis</artifactId>
  <version>3.4.5</version>
</dependency>
<!--MySQL的依赖-->
<dependency>
  <groupId>mysql</groupId>
  <artifactId>mysql-connector-java</artifactId>
  <version>5.1.43</version>
</dependency>
<!--SpringMVC的依赖-->
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-webmvc</artifactId>
  <version>${spring.version}</version>
</dependency>
<!--spring连接数据库的依赖-->
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-jdbc</artifactId>
  <version>${spring.version}</version>
</dependency>
<!--spring配置切面的依赖-->
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-aspects</artifactId>
  <version>${spring.version}</version>
</dependency>
<!--spring的上下文的依赖-->
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-context</artifactId>
  <version>${spring.version}</version>
</dependency>
<!--Spring和MyBatis和整合依赖-->
<dependency>
  <groupId>org.mybatis</groupId>
  <artifactId>mybatis-spring</artifactId>
  <version>1.3.1</version>
</dependency>
<!--C3p0的依赖-->
<dependency>
  <groupId>com.mchange</groupId>
  <artifactId>c3p0</artifactId>
  <version>0.9.5.1</version>
</dependency>
<!--servlet的依赖-->
<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>javax.servlet-api</artifactId>
  <version>4.0.0</version>
  <scope>provided</scope>
</dependency>

建包

controller 控制
mapper 映射
model 实体
service 业务逻辑（接口）
service.impl 实现service

例：
在这里插入图片描述

applicationContext.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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/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">

    <!--配置数据源 C3p0代替mybatis的数据源-->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="user" value="root"></property>
        <property name="password" value="1234"></property>
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/t202?characterEncoding=utf-8"></property>
        <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
        <property name="initialPoolSize" value="3"></property>
        <property name="maxPoolSize" value="20"></property>
    </bean>

    <!--配置Mybatis的sessionFactory-->
    <bean id="sessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"></property>
        <!--配置别名
        <property name="typeAliasesPackage" value="com.ssm.model"></property>

        <property name="mapperLocations" value="classpath:com/ssm/model/*.xml"></property>-->
    </bean>

    <!--mapper的扫描-->
    <bean id="scannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.ssm.mapper"></property>
    </bean>

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

    <!--配置在当前项目中哪些方法需要事务管理-->
    <tx:advice id="tdAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <tx:method name="add*" propagation="REQUIRED"/>
            <tx:method name="delete*" propagation="REQUIRED"/>
            <tx:method name="update*" propagation="REQUIRED"/>
            <tx:method name="*" read-only="true"/>
        </tx:attributes>
    </tx:advice>


    <!--切入点配置-->
    <aop:config>
        <aop:pointcut id="pointCut" expression="execution(* com.ssm.service.impl.*.*(..))"/>
        <aop:advisor advice-ref="tdAdvice" pointcut-ref="pointCut"></aop:advisor>
    </aop:config>
</beans>

web.xml

<!--spring的环境配置-->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>
  <!--配置监听器-->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

service.impl 中引用映射层mapper

public class UsersServiceImpl implements UsersService {

  	//创建映射层的引用
    @Autowired
    private UsersMapper usersMapper;
    @Override
    public List<Users> findAllUsers() {
        //调用UsersMapper中的查询方法
        List<Users> list=usersMapper.findAllUsers();
        return list;
    }
}

controller 中引用业务层service

public class MainController {
//创建服务层的引用
@Autowired
private UsersService usersService;

@RequestMapping("test")
public String test(){
    System.out.println("ok");
    return "index";
}

//查询所有用户的方法
@RequestMapping("findAllUsers")
public String findAllUsers(){

    for (Users u : usersService.findAllUsers()) {
        System.out.println(u);
    }
  return "index";

}
}