Based on a java JDBC driver, the program is divided into three layers: the driver layer and a connection pool basic operation layer (for query, delete, modify the basic operation) function instruction level, mainly through the practical problems writing the actual operating instructions.

db_API
......\.classpath
......\.project
......\.settings
......\.........\org.eclipse.core.resources.prefs
......\.........\org.eclipse.core.runtime.prefs
......\.........\org.eclipse.jdt.core.prefs
......\.........\org.eclipse.ltk.core.refactoring.prefs
......\bin
......\...\DB_API
......\...\......\Comm_API.class
......\...\......\Device_API.class
......\...\......\Family_info.class
......\...\......\MobileBaseInfo_API.class
......\...\......\Slave_device_info.class
......\...\......\Slave_status_info.class
......\...\......\UserControlDevice_API.class
......\...\......\User_info.class
......\...\......\User_purchase.class
......\...\DB_pool
......\...\.......\DataSourcePool$1.class
......\...\.......\DataSourcePool.class
......\...\.......\JDBCUtil.class
......\...\TestPrograms
......\...\............\Test.class
......\...\............\Test1.class
......\...\............\Test_userInfo.class
......\...\properties.xml
......\src
......\...\DB_API
......\...\......\Comm_API.java
......\...\......\Device_API.java
......\...\......\Family_info.java
......\...\......\MobileBaseInfo_API.java
......\...\......\Slave_device_info.java
......\...\......\Slave_status_info.java
......\...\......\UserControlDevice_API.java
......\...\......\User_info.java
......\...\......\User_purchase.java
......\...\DB_pool
......\...\.......\DataSourcePool.java
......\...\.......\JDBCUtil.java
......\...\TestPrograms
......\...\............\Test.java
......\...\............\Test1.java
......\...\............\Test_userInfo.java
......\...\properties.xml

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