万能的查询方法
..............\.classpath
..............\.project
..............\bin
..............\...\dbHelpPack
..............\...\..........\ConnectionClass.class
..............\...\..........\PropertiesClass.class
..............\...\..........\QueryMethodDemo.properties
..............\...\entityPack
..............\...\..........\Student.class
..............\...\..........\Teacher.class
..............\...\mainTestPack
..............\...\............\MainTest.class
..............\...\serverPack
..............\...\..........\ServerClass.class
..............\src
..............\...\dbHelpPack
..............\...\..........\ConnectionClass.java
..............\...\..........\PropertiesClass.java
..............\...\..........\QueryMethodDemo.properties
..............\...\entityPack
..............\...\..........\Student.java
..............\...\..........\Teacher.java
..............\...\mainTestPack
..............\...\............\MainTest.java
..............\...\serverPack
..............\...\..........\ServerClass.java
..............\示例数据库
..............\..........\SchoolDB.mdf
..............\..........\SchoolDB_log.LDF