摘要：The funciton of filter: filter the resouce and it's one of the Serlvet technology. When the user access to the resource, the filter will make some pro 阅读全文

摘要：DBUtils framework: Constructor: QueryRunner(); QueryRunner(DataSource dataSource); Method: batch: batch(Connection conn, String sql, Object[][] params 阅读全文

摘要：Connection Pool: create many connection objects in advance, and put the connection into the cache(list). The client will get the connection from the c 阅读全文

摘要：Transaction: a bunch of operation in logic, the unit which consists the operation will works all or breaks down all. Every operation of MySQL server i 阅读全文

摘要：1. SQL Paging Statement: different database has different paging statment MySQL: LIMIT M,N M: the start index, starts from 0 N: the items amout of eac 阅读全文