一个通用些连接数据库的包,其中有三个类: 1.DBConn.java:主要用来连接和关闭数据库.连接数据库的URL,USER,PASSWORD通过配置文件完成com/bcxy/util/systemconfig.properties 2.SqlQuery.java:主要用来执行查询的SQL语句.构造方法: SqlQuery(Connection con, String sql) 将结果存在容器中. 3.SqlUpdate.java:主要用来执行更新的SQL语句.构造方法: SqlUpdate(Connection con, String sql) 另: jar包中有一个util.*,主要是一些常用工具类,下面简单介绍一下: 其中主要包括了 StringUtil.java:对字串的一些操作 DateUtil.java:对时间的一些操作 FileUtil.java:对文件的一些操作 SystemConfig.java:读取配置文件systemconfig.properties ParamUtil.java:页面传参数的操作-a more generic database connectivity package, which has three categories : 1.DBConn.java : mainly used to connect to the database and closure. Connecting to the database URL, USER, PASSWORD through configuration files completed com / bcxy / util / systemconfig.properties 2.SqlQuery. java : mainly used for the implementation of the SQL statement. Construction : SqlQuery (Connection con, String sql) of the results there containers. 3.SqlUpdate.java : mainly used for the implementation of the updated SQL. Construction : SqlUpdate (Connection con, String sql) Another : jar with a packet util .*, mainly some type commonly used tools, described briefly below : including mainly the StringUtil.java : some of the string operation DateUtil.java : right time for operation FileUtil.java : to document