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持久层的具体实现
1.如果是maven下使用，需要在pom.xml中导入数据库包
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<dependencies> <dependency> <groupId>com.yaorange.sbuy</groupId> <artifactId>sbuy-manager-pojo</artifactId> <version>0.0.1-SNAPSHOT</version> </dependency> <!-- Mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> </dependency> <!--mybatis与spring连接包--> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> </dependency> <!--分页插件--> <dependency> <groupId>com.github.miemiedev</groupId> <artifactId>mybatis-paginator</artifactId> </dependency>
<dependency> <groupId>com.github.pagehelper</groupId> <artifactId>pagehelper</artifactId> </dependency> <!-- MySql --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <!-- 连接池 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> </dependency> </dependencies>
<!-- 如果不添加此节点mybatis的mapper.xml文件都会被漏掉。 --> <build> <resources> <resource> <directory>src/main/java</directory> <includes> <include>**/*.xml</include> </includes> <filtering>false</filtering> </resource> </resources> </build> |
2.配置数据库类型（可不配）
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<?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> <plugins> <!-- com.github.pagehelper为PageHelper类所在包名 --> <plugin interceptor="com.github.pagehelper.PageHelper"> <!-- 设置数据库类型 Oracle,Mysql,MariaDB,SQLite,Hsqldb,PostgreSQL六种数据库--> <property name="dialect" value="http://www.mamicode.com/mysql"/> </plugin> </plugins> </configuration> |
3. db.properties
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jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/db_sbuy?characterEncoding=utf-8 jdbc.username=root jdbc.password=123 |
4. applicationContext-dao.xml
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<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p" 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-4.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
<!-- 加载配置文件 --> <context:property-placeholder location="classpath:properties/*.properties" /> <!-- 数据库连接池 --> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" destroy-method="close"> <property name="url" value="http://www.mamicode.com/${jdbc.url}" /> <property name="username" value="http://www.mamicode.com/${jdbc.username}" /> <property name="password" value="http://www.mamicode.com/${jdbc.password}" /> <property name="driverClassName" value="http://www.mamicode.com/${jdbc.driver}" /> <property name="maxActive" value="http://www.mamicode.com/10" /> <property name="minIdle" value="http://www.mamicode.com/5" /> </bean> <!-- 配置sqlsessionFactory --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="configLocation" value="http://www.mamicode.com/classpath:mybatis/SqlMapConfig.xml"></property> <property name="dataSource" ref="dataSource"></property> </bean> <!-- 配置扫描包，加载mapper代理对象 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="http://www.mamicode.com/com.yaorange.sbuy.mapper"></property> </bean> </beans> |
<!-- 配置扫描包，加载mapper代理对象 -->
反向生成实现类
接口类中方法名于mapper中id一致即可
持久层的具体实现