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;   }  }

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;   }    }

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.Driver  url=jdbc:mysql://127.0.0.1:3306/shuangseqiu  username=root  password=  filters=stat  initialSize=2  maxActive=300  maxWait=60000  timeBetweenEvictionRunsMillis=60000  minEvictableIdleTimeMillis=300000  validationQuery=SELECT 1  testWhileIdle=true  testOnBorrow=false  testOnReturn=false  poolPreparedStatements=false  maxPoolPreparedStatementPerConnectionSize=200