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使用Hibernate的时候觉得它太笨重了,而且还要在学一下HQL,可能不适合一些敏捷项目,小项目.然后就找到了dbutils,觉得还不错.,因此尝试着把druid和dbutils集成在一起.
首先创建一个DBUtilsHelper,用于连接数据库,起到druid和dbutils之间的桥梁作用.
import java.sql.SQLException;import javax.sql.DataSource;import org.apache.commons.dbutils.QueryRunner;public class DBUtilsHelper { private DataSource ds = null; private QueryRunner runner = null; public DBUtilsHelper() { try { this.ds = DbPoolConnection.getInstance().getDataSource(); } catch (SQLException e) { e.printStackTrace(); } if (this.ds != null) { this.runner = new QueryRunner(this.ds); } } public DBUtilsHelper(DataSource ds) { this.ds = ds; this.runner = new QueryRunner(this.ds); } public QueryRunner getRunner() { return this.runner; }}再建一个druid初始化类
import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.sql.SQLException;import java.util.Properties;import com.alibaba.druid.pool.DruidDataSource;import com.alibaba.druid.pool.DruidDataSourceFactory;import com.alibaba.druid.pool.DruidPooledConnection;public class DbPoolConnection { private static DbPoolConnection databasePool = null; private static DruidDataSource dds = null; static { Properties properties = loadPropertyFile("db_server.properties"); try { dds = (DruidDataSource) DruidDataSourceFactory .createDataSource(properties); } catch (Exception e) { e.printStackTrace(); } } private DbPoolConnection() { } public static synchronized DbPoolConnection getInstance() { if (null == databasePool) { databasePool = new DbPoolConnection(); } return databasePool; } public DruidDataSource getDataSource() throws SQLException { return dds; } public DruidPooledConnection getConnection() throws SQLException { return dds.getConnection(); } public static Properties loadPropertyFile(String fullFile) { String webRootPath = null; if (null == fullFile || fullFile.equals("")) throw new IllegalArgumentException( "Properties file path can not be null : " + fullFile); webRootPath = DbPoolConnection.class.getClassLoader().getResource("\\") .getPath(); webRootPath = new File(webRootPath).getParent(); InputStream inputStream = null; Properties p = null; try { String profilepath = webRootPath + File.separator + fullFile; System.out.println(profilepath); inputStream = new FileInputStream(new File(profilepath)); p = new Properties(); p.load(inputStream); } catch (FileNotFoundException e) { throw new IllegalArgumentException("Properties file not found: " + fullFile); } catch (IOException e) { throw new IllegalArgumentException( "Properties file can not be loading: " + fullFile); } finally { try { if (inputStream != null) inputStream.close(); } catch (IOException e) { e.printStackTrace(); } } return p; }}下面是测试dbutils示例类
import java.sql.SQLException;import java.util.Iterator;import java.util.List;import java.util.Map;import org.apache.commons.dbutils.QueryRunner;import org.apache.commons.dbutils.ResultSetHandler;import org.apache.commons.dbutils.handlers.ArrayHandler;import org.apache.commons.dbutils.handlers.ArrayListHandler;import org.apache.commons.dbutils.handlers.BeanHandler;import org.apache.commons.dbutils.handlers.BeanListHandler;import org.apache.commons.dbutils.handlers.ColumnListHandler;import org.apache.commons.dbutils.handlers.KeyedHandler;import org.apache.commons.dbutils.handlers.MapHandler;import org.apache.commons.dbutils.handlers.MapListHandler;import org.apache.commons.dbutils.handlers.ScalarHandler;public class Druid_Dbutils_fully_test { public static void main(String[] args) throws SQLException { DBUtilsHelper dbh = new DBUtilsHelper(); QueryRunner runner = dbh.getRunner(); runner.update("insert into ssq(qishu) values('1883')"); runner.update("update ssq set qishu='1890' where qishu=?", "1880"); // 返回ArrayHandler结果,第一行结果：Object[] System.out.println("A:返回ArrayHandler结果......"); Object[] arrayResult = runner.query("select * from ssq", new ArrayHandler()); for (int i = 0; i < arrayResult.length; i++) { System.out.print(arrayResult[i] + " "); } System.out.println(); // 返回ArrayListHandler结果,第一行结果：List<Object[]> System.out.println("B:返回ArrayListHandler结果(仅显示5行)........."); List<Object[]> arrayListResult = runner.query("select * from ssq", new ArrayListHandler()); for (int i = 0; i < arrayListResult.size() && i < 5; i++) { for (int j = 0; j < arrayListResult.get(i).length; j++) { System.out.print(arrayListResult.get(i)[j] + " "); } System.out.println(); } System.out.println(); // 返回bean System.out.println("X:单条返回bean结果."); ShuangSeQiu ssq = runner.query("select * from ssq where qishu like ?", new BeanHandler<ShuangSeQiu>(ShuangSeQiu.class), "2009%"); System.out.println("bean:" + ssq.getQishu()); System.out.println("X1:单条返回bean结果"); ResultSetHandler<ShuangSeQiu> h = new BeanHandler<ShuangSeQiu>( ShuangSeQiu.class); ShuangSeQiu p = runner.query( "select * from ssq where qishu like ? limit 1", h, "2009%"); System.out.println(p.getQishu()); // 返回beanlist System.out.println("C:返回BeanList结果(仅显示5行)......"); List<ShuangSeQiu> beanListResult = runner.query("select * from ssq", new BeanListHandler<ShuangSeQiu>(ShuangSeQiu.class)); Iterator<ShuangSeQiu> iter_beanList = beanListResult.iterator(); int shownum = 0; while (iter_beanList.hasNext() && shownum < 5) { System.out.println(iter_beanList.next().getQishu()); shownum++; } // 返回指定列 System.out.println("D:返回ColumnList结果......"); List<Object> columnResult = runner.query("select * from ssq", new ColumnListHandler<Object>("qishu")); Iterator<Object> iter = columnResult.iterator(); shownum = 0; while (iter.hasNext() && shownum < 5) { System.out.println(iter.next()); shownum++; } // 返回KeyedHandler结果：Map<Object,Map<String,Object>>：map的key为KeyedHandler指定 System.out.println("E:返回KeyedHandler结果,期数:2003001的a列值........."); Map<Object, Map<String, Object>> keyedResult = runner.query( "select * from ssq", new KeyedHandler<Object>("qishu")); System.out.println(keyedResult.get("2003001").get("a")); // MapHandler System.out.println("F:返回MapHandler结果........."); Map<String, Object> mapResult = runner.query("select * from ssq", new MapHandler()); Iterator<String> iter_mapResult = mapResult.keySet().iterator(); while (iter_mapResult.hasNext()) { System.out.print(mapResult.get(iter_mapResult.next()) + " "); } System.out.println(); // 返回MapListHandler结果 System.out.println("G:返回MapListHandler结果........."); List<Map<String, Object>> mapListResult = runner.query( "select * from ssq", new MapListHandler()); for (int i = 0; i < mapListResult.size() && i < 5; i++) { Iterator<String> values = mapListResult.get(i).keySet().iterator(); while (values.hasNext()) { System.out.print(mapListResult.get(i).get(values.next()) + " "); } System.out.println(); } Object increaseId = runner.query("select last_insert_id()", new ScalarHandler<Object>()); System.out.println(increaseId); }}贴了一堆代码,就这么样吧.另外忘记贴druid配置了
下面列出来(db_server.properties)
driverClassName=com.mysql.jdbc.Driverurl=jdbc:mysql://127.0.0.1:3306/shuangseqiuusername=rootpassword=filters=statinitialSize=2maxActive=300maxWait=60000timeBetweenEvictionRunsMillis=60000minEvictableIdleTimeMillis=300000validationQuery=SELECT 1testWhileIdle=truetestOnBorrow=falsetestOnReturn=falsepoolPreparedStatements=falsemaxPoolPreparedStatementPerConnectionSize=200转自【http://my.oschina.net/muchuanwazi/blog/225127】
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