Spring - MyBatis Integration

A, xml configuration version

　　1. Import dependence

<-! MyBatis and Spring integration package provided by MyBatis -> 
< dependency > 
  < the groupId > org.mybatis </ the groupId > 
  < the artifactId > MyBatis-Spring </ the artifactId > 
  < Version > 1.3.0 </ Version > 
< / dependency > 
<-! MyBatis core jar file -> 
< dependency > 
  < groupId > org.mybatis </ groupId > 
  < artifactId >mybatis</artifactId>
  <version>3.4.1</version>
</dependency>

　　2. Create entity classes

public class User {
    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;
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", money=" + money +
                '}';
    }
}

　　3. Create Dao layer interface and its mapping file

public interface UserDao {
    List<User> getAll();
}

<?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">
<!--小配置根节点 namespace代表命名空间-->
<mapper namespace="com.wdksoft.dao.UserDao">
    <select id="getAll" resultType="User">
        select * from user
    </select>
</mapper>

　　Layer interface and its implementation class 4.Service

public interface UserService {
    List<User> getAll();
}

public class UserServiceImpl implements UserService {
    private UserDao userDao;

    public UserDao getUserDao() {
        return userDao;
    }

    public void setUserDao(UserDao userDao) {
        this.userDao = userDao;
    }

    @Override
    public List<User> getAll() {
        return userDao.getAll();
    }
}

　　5. Profiles

<? Xml Version = "1.0" encoding = "UTF-8" ?> 
<-! Header file xml file, is binding on the file (for example: which nodes must be present) -> 
! < DOCTYPE the Configuration 
        the PUBLIC "- // 3.0 // EN mybatis.org//DTD Config" 
        "http://mybatis.org/dtd/mybatis-3-config.dtd" > 
< Configuration > 

    < typeAliases > 
        < Package name = "com.wdksoft .entity " /> 
    </ typeAliases > 

    < mappers > <-! map file manage our configuration -> 
        < Package Penalty for name =" com.wdksoft.dao"/>
    </mappers>

</configuration>

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/bank?useUniCode=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=123

 <!--加载配置文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!--配置数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <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>
    <!--配置SqlSessionFactoryBean-->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--加载Mybatis配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </ ->Scanning Dao layer, omitting the code<-!>The bean
    
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.wdksoft.dao"/>
    </bean>
    <!--注入dao层-->
    <bean id="userDao" class="org.mybatis.spring.mapper.MapperFactoryBean">
        <property name="mapperInterface" value="com.wdksoft.dao.UserDao"></property>
        <property name="sqlSessionFactory" ref="sqlSessionFactoryBean"></property>
    </bean>
    <!--注入Service-->

    <bean id="userService" class="com.wdksoft.service.impl.UserServiceImpl">
        <property name="userDao" ref="userDao"></property>
    </bean>

Second, the edition notes

　　Spring configuration file:

<!--包扫描器-->
    <context:component-scan base-package="com.wdksoft"/>
    <!--加载配置文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>
    <!--配置数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <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>
    <!--配置SqlSessionFactoryBean-->
    <bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--加载Mybatis配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
    </bean>
    <!--扫描Dao层，省略代码-->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.wdksoft.dao"/>
    </bean>

　　Other add annotations corresponding to