spring boot +mybatis 操作sqlite数据库

代码说明

mybatis-config.xml 这里主要用于数据库的配置，mapper文件映射。

对于里面的配置主要说明一下url里的值，由于是sqlite的关系在数据库的路径那里要注意下，层次结构给的是dal层，数据库实际放在了应用启动屋 webservice-boot的目录里。
如果数据库找不到，程序会在错误的路径里新建一个空的数据文件.
单元测试里用了admin这张表，当初就是数据库路径不对一直报：
Error querying database.  Cause: org.sqlite.SQLiteException: [SQLITE_ERROR] SQL error or missing database (no such table: admin)

<?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>
    <environments default="development">
        <environment id="development">
            <!-- 配置JDBC事务,此事务由mybatis管理 -->
            <transactionManager type="JDBC"></transactionManager>
            <!-- 配置连接池,此连接池为mybatis连接池 -->
            <dataSource type="POOLED">
                <property name="driver" value="org.sqlite.JDBC"/>
                <property name="url" value="jdbc:sqlite:../webservice-boot/src/main/resources/DB.sqlite3"/>
                <property name="username" value=""/>
                <property name="password" value=""/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper resource="mybatis/mapper/AdminMapper.xml" />
    </mappers>
</configuration>

View Code

AdminDO.java

package com.pxinhai.webservice.dal.admin;

public class AdminDO {

    private String adminID;

    public String getAdminID() {
        return adminID;
    }

    public void setAdminID(String adminID) {
        this.adminID = adminID;
    }
}

View Code

 

DalFactory.java 数据管理工厂层，从mybatis-config里获取数据配置文件，创建sqlsession

     String resource = "mybatis-config.xml";
        InputStream inputStream = null;
        try {
            inputStream = Resources.getResourceAsStream(resource);
        } catch (IOException e) {
            e.printStackTrace();
        }
        SqlSessionFactory sqlSessionFactory= new  SqlSessionFactoryBuilder().build(inputStream);
        return sqlSessionFactory.openSession();

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AdminMapper.xml 对sql语句与DO的映射配置，需要注意namespace与dal接口层要一致

<?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="com.pxinhai.webservice.dal.admin.AdminDal" >
    <select id="findAdminById" parameterType="String"  resultType="com.pxinhai.webservice.dal.admin.AdminDO">
        SELECT
        * FROM admin WHERE adminID =#{adminID}
    </select>
</mapper>

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AdminDal.java 接口层 ，spring规范打 Repository注解注入到容器里去就不需要在mybatis-config指定了

package com.pxinhai.webservice.dal.admin;


import org.springframework.stereotype.Repository;

@Repository
public interface AdminDal {

    AdminDO findAdminById(String adminID);

}

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单元测试

 

@SpringBootConfiguration
@RunWith(SpringRunner.class)
@SpringBootTest
public class AdminDalTest {
    @Test
    public void testFindAdminById(){
        SqlSession sqlSession=new DalFactory().getSession();
        AdminDal dal=sqlSession.getMapper(AdminDal.class);
        AdminDO mm=dal.findAdminById("admin");
        Assert.assertNotNull(mm);
        sqlSession.close();
    }

}

View Code

 

如果通过SpringApplication.rum 来启运项目，还需手运排除自动加载数据库配置文件。
在应用启动如入的class文件加：@SpringBootApplication(exclude= {DataSourceAutoConfiguration.class})

spring boot +mybatis 操作sqlite数据库

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