druid与dbutils集成示例

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
		System.out.println("B:返回ArrayListHandler结果(仅显示5行).........");
		List 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.class), "2009%");
		System.out.println("bean:" + ssq.getQishu());
		System.out.println("X1:单条返回bean结果");
		ResultSetHandler h = new BeanHandler(
				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 beanListResult = runner.query("select * from ssq",
				new BeanListHandler(ShuangSeQiu.class));
		Iterator 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