SSM整合流程

2022-08-08 00:03:05 作者：互联网

一、准备数据库

二、导入相关依赖

<dependencies>

    <!--    mybatis所用的-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.5.10</version>
    </dependency>

    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.47</version>
    </dependency>


    <!--    spring所需-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>5.3.21</version>
    </dependency>

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>5.3.19</version>
    </dependency>

    <!--    mvc-->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>5.3.21</version>
    </dependency>

    <!--    spring整合Mybatis-->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>2.0.6</version>
    </dependency>

    <!--lombok-->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.24</version>
    </dependency>



    <!--    servlet-->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>4.0.1</version>
    </dependency>

    <dependency>
        <groupId>javax.servlet.jsp</groupId>
        <artifactId>jsp-api</artifactId>
        <version>2.2</version>
    </dependency>

    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>

</dependencies>

资源过滤：

<!--资源过滤-->
  <build>
    <resources>
      <resource>
        <directory>src/main/java</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
      </resource>
      <resource>
        <directory>src/main/resources</directory>
        <includes>
          <include>**/*.properties</include>
          <include>**/*.xml</include>
        </includes>
        <filtering>false</filtering>
      </resource>
    </resources>
  </build>

三、建立项目基本结构

建立基本结构和配置框架！

cn.laoyao.pojo
cn.laoyao.dao
cn.laoyao.service
cn.laoyao.controller
cn.laoyao.utils

mybatis-config.xml

<?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>

applicationContext.xml

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

</beans>

四、Mybatis层编写

1、数据库配置文件 database.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/数据库名?useSSL=true&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=root

2、IDEA关联数据库

3、编写MyBatis的核心配置文件mybatis-config.xml及spring-mapper.xml

mybatis-config.xml：

<?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>
    
    <!--别名-->
    <typeAliases>
        <package name="cn.laoyao.pojo"/>
    </typeAliases>
    <!--配置映射器-->
    <mappers>
        <mapper resource="cn/laoyao/dao/BookMapper"/>
    </mappers>

</configuration>

spring-mapper.xml：

<?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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       https://www.springframework.org/schema/context/spring-context.xsd">


    <!--关联配置文件，可以在spring中使用${}-->
    <context:property-placeholder location="classpath:db.properties"/>

    <!--
        2、连接池
            dbcp:半自动化操作，不能自动连接
            c3pe:自动化操作（自动化的加载配置文件，并且可以自动设置到对象中! )
            druid : hikari
    -->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${jdbc.driver}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
    </bean>


    <!--3、sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--绑定Mybatis配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>


    <!--
        4、配置dao接口扫描包，动态实现dao接口可以注入到spring容器中
        也就是说不用写xxxMapperImpl类了
        实现：【接口】->【spring容器】
    -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--注入sqlSessionFactory-->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!--要扫描的包-->
        <property name="basePackage" value="cn.laoyao.dao"/>

    </bean>
</beans>

4、编写数据库对应的实体类

@Data
public class User {
    private String name;
    private String sex;
    private String age;
}

5、编写Dao层的 UserMapper接口！

public interface UserMapper {
    /**
     * 根据id查询user
     */
    User selectUserById(String id);
}

6、编写接口对应的 UserMapper.xml 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="cn.laoyao.dao.UserMapper">

<select id="selectUserById" resultType="cn.laoyao.pojo.User">
    select *
    from test.user
    where id=#{id}
</select>

</mapper>

五、service层

service接口

public interface UserService {
    /**
     * 根据id查询user
     */
    User selectUserById(String id);
}

实现类

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    UserMapper userMapper;

    @Override
    public User selectUserById(String id) {
        User user = userMapper.selectUserById(id);
        return user;
    }
}

配置文件

spring-service.xml：

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


    <!--1、扫描service下的包,使注解生效-->
    <context:component-scan base-package="cn.laoyao.service"/>

    <!--可以用下面方式注入，也可以使用@Service注解-->
    
    <!--2、将我们的所有业务类，注入到Spring，可以通过配置，或者注解-->
    <bean id="UserServiceImpl" class="cn.laoyao.service.UserServiceImpl">
        <property name="userMapper" ref="userMapper"/>
    </bean>

    <!--3、声明式事务配置-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--注入数据源-->
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!--4、aop-->
    
</beans>

六、MVC

spring-mvc.xml：

<!--开启mvc注解支持-->
<mvc:annotation-driven/>
<!--开启包扫描-->
<context:component-scan base-package="cn.laoyao.controller"/>

@RestController
public class MyController {

    @Autowired
    UserService userService;

    @RequestMapping("/query/{name}")
    public Object test(@PathVariable String name){
        User user = userService.selectUserByName(name);
        return user;
    }
}

标签：xml,String,spring,流程,public,SSM,user,整合,id
来源： https://www.cnblogs.com/zlaoyao/p/16560275.html