commons-dbutils Helper

封装下dbutils, 使用这个help去操作数据库会非常的方便，下面还提供了例子.

package com.kneel.core.help;

import java.io.IOException;

/**
 * just wrap DbUtils QueryRunner, provider simple functions to use.
 * 
 * give chance to add action and do operator
 * 
 * query: resolve all query problem. insert: get secuqnce to insert update:
 * execute update with params. delete: execute delete with params batch: batch
 * update and delete with params.
 * 
 * NOTE: batch operator, please cause of batchSize, this will be set how many
 * counts we commit, and do next batch.
 * 
 * NOTE: below have expand of Connection PARAMS, if call please add.
 * 
 * NOTE: if query large Datas, please set FecthSize, this will be improve
 * performance.
 * 
 * we often use Bean to setter/getter, with columnToPropertyOverrides,we use
 * this to process column name not same as property. or we can do below SELECT
 * event_id id, event_date date,title from events. this will be re-name column
 * lable name.(care of key of Database)
 * 
 * queryBean: query one row to Bean queryBeanList: query multiple rows to
 * List queryBeanMap: query multiple rows to Map
 * 
 * Query List application
 * 
 * queryColumn: query one column value queryColumnSqlKey: query one column value
 * with sql key queryMap: query one row to Map queryKeyMap: query
 * multiple rows to Map> queryListMap: query multiple
 * rows to List> queryArray: query one row to Object[]
 * queryArrayList: query multiple rows to List
 * 
 * 
 * 
 * Example one: easy to queryBean.
 * 
 * String sql = "SELECT * FROM EVENTS WHERE EVENT_ID = ?"; Object[] params = new
 * Object[] { 130L }; Event event = helper.queryBean(sql, Event.class, params);
 * //Event event = helper.queryBean(sql, Event.class,130L);
 * 
 * Example two: Column not match property
 * 
 * Map columnToPropertyOverrides = new HashMap();
 * columnToPropertyOverrides.put("EVENT_ID", "id");
 * columnToPropertyOverrides.put("EVENT_DATE", "date"); String sql =
 * "SELECT * FROM EVENTS WHERE EVENT_ID = ?"; Object[] params = new Object[] {
 * 130L }; Event event = helper.queryBean(sql,
 * Event.class,columnToPropertyOverrides, params);
 * 
 * Example three: easy to insert
 * 
 * String sql = "INSERT into events(event_id,event_date,title) VALUES(?,?,?)";
 * Object[] params = new Object[] { event.getDate(),event.getTitle() }; Long id
 * = helper.insert(sql, "events_sequnce", params);
 * 
 * Example four: easy to query one column String sql =
 * "SELECT count(*) eventCount  FROM events"; Object count =
 * helper.queryColumn(sql, "eventCount");
 * 
 * Example five: easy to get one column multiple rows List
 * 
 * String sql = "SELECT event_id  FROM events"; List