package com.oterman.DButils;
 
    import java.sql.SQLException;
    import java.util.List;
    import java.util.Map;
 
    import org.apache.commons.dbutils.QueryRunner;
    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.MapHandler;
    import org.apache.commons.dbutils.handlers.MapListHandler;
    import org.apache.commons.dbutils.handlers.ScalarHandler;
    
 
import org.junit.Test;
 
    import com.mchange.v2.c3p0.ComboPooledDataSource;
 
    /**
     * 該程式介紹ResultSetHandler的各個實現類；
     * @author 大蘑菇
     *
     */
    public class RSHandlerDemo {
 
        //--7.ScalarHandler：將查詢的結果的第一行的某一列放到一個物件中；精確定位到某個值；
        @Test
        public void query7() throws
 
 SQLException{
            
            QueryRunner runner=new QueryRunner(new ComboPooledDataSource());
            String name=(String)runner.query("select * from account",new ScalarHandler(2));
            System.out.println(name);
        }
        
        //--6.MapListHandler：將查詢的結果的每一行存入到一個map中，鍵為列名，值為各列值；然後再將map存入list中；
        @Test
        public void query6() throws SQLException{
            
            QueryRunner runner=new QueryRunner(new ComboPooledDataSource());
            List<Map<String,Object>> map=runner.query("select * from account",new MapListHandler());
            System.out.println(map);
        }
        
        //--5.MapHandler：將查詢的結果的第一行存入到一個map中，鍵為列名，值為各列值；
        @Test
        public void query5() throws SQLException{
            
            QueryRunner runner=new QueryRunner(new ComboPooledDataSource());
            Map<String,Object> map=runner.query("select * from account",new MapHandler());
            System.out.println(map);
        }
        
        //--4.BeanListHandler：將查詢的結果的每一行封裝到一個javabean物件中，然後再將這些物件存入list中；
        @Test
        public void query4() throws SQLException{
            
            QueryRunner runner=new QueryRunner(new ComboPooledDataSource());
            List<Account> list=runner.query("select * from account",new BeanListHandler<Account>(Account.class));
            System.out.println(list);
        }
        
        
        //--3.BeanHandler：將查詢的結果的第一行封裝到一份javabean物件中；
        @Test
        public void query3() throws SQLException{
            
            QueryRunner runner=new QueryRunner(new ComboPooledDataSource());
            Account account=runner.query("select * from account",new BeanHandler<Account>(Account.class));
            System.out.println(account);
        }
        
        
        //--2.ArrayListHandler：將查詢的結果的每一行放到一個數組中，然後再將陣列放到集合中；
        @Test
        public void query2() throws SQLException{
            
            QueryRunner runner=new QueryRunner(new ComboPooledDataSource());
            List<Object[]> list=runner.query("select * from account",new ArrayListHandler());
            System.out.println(list);
        }
        
        //--1.ArrayHandler：將查詢的結果的第一行放到一個數組中
        @Test
        public void query1() throws SQLException{
            
            QueryRunner runner=new QueryRunner(new ComboPooledDataSource());
            Object[] array=runner.query("select * from account",new ArrayHandler());
            System.out.println(array);
        }
    }