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十.Spring ORM

十.Spring ORM

作者: A_x_A | 来源:发表于2019-03-11 17:46 被阅读0次
  • 依赖
 <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <spring.version>5.1.5.RELEASE</spring.version>
        <aspectj.version>1.9.2</aspectj.version>
        <junit.version>4.12</junit.version>
        <log4j.version>1.2.17</log4j.version>
        <slf4j.version>1.7.12</slf4j.version>
        <hutool.version>4.5.1</hutool.version>
        <mysql.version>5.1.47</mysql.version>
        <mybatis.version>3.5.0</mybatis.version>
        <mybatis-spring.version>2.0.0</mybatis-spring.version>
        <tk-mybatis.version>4.1.5</tk-mybatis.version>
        <druid.version>1.1.14</druid.version>
        <lombok.version>1.18.6</lombok.version>
    </properties>

    <dependencies>
        <!--junit依赖-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>${junit.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--spring-test依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--spring-aop依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--aspectj依赖-->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>${aspectj.version}</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>${aspectj.version}</version>
        </dependency>
        <!--Lombok 依赖-->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
        </dependency>
        <!-- log4j日志依赖 -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.6.6</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.6.6</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.16</version>
        </dependency>
        <!--hutool依赖-->
        <dependency>
            <groupId>cn.hutool</groupId>
            <artifactId>hutool-all</artifactId>
            <version>${hutool.version}</version>
        </dependency>

        <dependency>
            <groupId>com.google.zxing</groupId>
            <artifactId>core</artifactId>
            <version>3.3.3</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--spring-jdbc依赖-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!--mysql依赖-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
        </dependency>
        <!--mybatis依赖-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <!--mybatis-spring依赖-->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>${mybatis-spring.version}</version>
        </dependency>
        <!--通用mapper依赖-->
        <dependency>
            <groupId>tk.mybatis</groupId>
            <artifactId>mapper</artifactId>
            <version>${tk-mybatis.version}</version>
        </dependency>
        <!--druid依赖-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>${druid.version}</version>
        </dependency>
    </dependencies>

  • 数据表


    数据表.png

  • orm模块结构


    image.png
  • jdbc.properties
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db_spring?useUnicode=true&characterEncoding=utf-8
jdbc.username=root
jdbc.password=root
  • log4j.properties
##日志输出的级别，以及配置记录方案
log4j.rootLogger=debug, stdout,file

##设置日志记录到控制台的方式
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %5p %c{1}:%L - %m%n
##设置日志记录到文件的方式
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=logs/my_log.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %5p %c{1}:%L - %m%n
  • spring_mybatis.xml配置文件
<?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"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/tx
         http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!--读入外部数据库连接属性文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!--扫描Service包的组件-->
    <context:component-scan base-package="com.spring.service"/>

    <!--通过druid配置数据源-->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
          init-method="init" destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <!-- 初始化大小 -->
        <property name="initialSize" value="20"/>
        <!-- 连接池最大使用连接数量 -->
        <property name="maxActive" value="20"/>
        <!-- 连接池最小空闲 -->
        <property name="minIdle" value="0"/>
        <!-- 配置获取连接等待超时的时间 -->
        <property name="maxWait" value="60000"/>
        <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
        <property name="timeBetweenEvictionRunsMillis" value="60000"/>
        <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
        <property name="minEvictableIdleTimeMillis" value="300000"/>
        <!-- 连接空闲时测试是否有效 -->
        <property name="testWhileIdle" value="false"/>
        <!-- 获取连接时测试是否有效 -->
        <property name="testOnBorrow" value="false"/>
        <!-- 归还连接时是否测试有效 -->
        <property name="testOnReturn" value="false"/>
        <!-- 打开PSCache缓存，并且指定每个连接上PSCache的大小 -->
        <property name="poolPreparedStatements" value="true"/>
        <property name="maxPoolPreparedStatementPerConnectionSize" value="20"/>
    </bean>

    <!-- 配置mybatis的Session -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="typeAliasesPackage" value="com.spring.entity"/>
    </bean>

    <!-- 配置通用Mapper -->
    <bean class="tk.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.spring.dao"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <property name="markerInterface" value="com.spring.dao.BaseDAO"/>
        <property name="properties">
            <value>
                mappers = com.spring.dao.BaseDAO
                IDENTITY = MYSQL
            </value>
        </property>
    </bean>

    <!--事务管理bean -->
    <bean id="manager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>
    <!-- 使用声明式事务 -->
    <tx:annotation-driven transaction-manager="manager"/>
</beans>
  • User类
package com.spring.entity;

import lombok.Data;

import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Table(name = "t_user")
@Data
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String account;
    private String password;
    private Integer credits;
}
  • BaseDAO接口
package com.spring.dao;


import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.MySqlMapper;

/**
 * (基本)通用DAO接口
 * @param <T>
 */
public interface BaseDAO<T> extends Mapper<T>, MySqlMapper<T> {
}
  • UserDAO接口
package com.spring.dao;

import com.spring.entity.User;

/*
UserDAO,继承通用DAO接口基础的CRUD功能
* */
public interface UserDAO extends BaseDAO<User> {

}
  • UserService接口
package com.spring.service;

import com.spring.entity.User;

import java.util.List;

public interface UserService {
    /**
     * 新增用户
     *
     * @param user
     * @return
     */
    int insertUser(User user);

    /**
     * 根据id删除用户
     *
     * @param id
     * @return
     */
    int deleteUser(long id);

    /**
     * 更新用户
     *
     * @param user
     * @return
     */
    int updateUser(User user);
    /**
     * 根据id查询用户
     *
     * @param id
     * @return
     */
    User getUser(long id);


    /**
     * 查询所有用户
     *
     * @return
     */

    List<User> selectUsers();
}
  • UserServiceImpl实现类
package com.spring.service.Impl;

import com.spring.dao.UserDAO;
import com.spring.entity.User;
import com.spring.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

//标注本类是一个service组件
@Service
//启动service层启动事务
@Transactional
public class UserServiceImpl implements UserService {
    @Autowired
    private UserDAO userDAO;

    @Override
    public int insertUser(User user) {
        return userDAO.insert(user);
    }

    @Override
    public int deleteUser(long id) {
        return userDAO.deleteByPrimaryKey(id);
    }

    @Override
    public int updateUser(User user) {
        return userDAO.updateByPrimaryKey(user);
    }

    @Override
    public User getUser(long id) {
        return userDAO.selectByPrimaryKey(id);
    }


    @Override
    public List<User> selectUsers() {

        return userDAO.selectAll();
    }
}
  • 对UserServiceImpl进行单元测试
package com.spring.service.Impl;

import com.spring.entity.User;
import com.spring.service.UserService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import java.util.List;

import static org.junit.Assert.assertEquals;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"/spring_mybatis.xml"})
public class UserServiceImplTest {

    @Autowired
    private UserService userService;

    @Test
    public void insertUser(){
        User user = new User();

        user.setAccount("test");
        user.setPassword("11111");
        user.setCredits(9992);
        int n = userService.insertUser(user);
        assertEquals(1, n);

    }

    @Test
    public void deleteUser() {
        int n = userService.deleteUser(1);
        assertEquals(1,n);
    }

    @Test
    public void updateUser() {
        User user = userService.getUser(2);
        user.setPassword("000");
        user.setCredits(134561);
        int n = userService.updateUser(user);
        assertEquals(1, n);
    }

    @Test
    public void getUser() {
        User user = userService.getUser(4);
        System.out.println(user);
    }


    @Test
    public void selectUsers() {
        List<User> users = userService.selectUsers();
        users.forEach(user -> System.out.println(user));
    }
}
  • 运行结果

原数据库内容

原数据库内容.png

插入

增.png

删除


删.png

修改


改.png
查询
查全.png 查单.png

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