BaseDao.util(虎大将军)

 package logistics.util;

 import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.ResultSetMetaData;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;

 import javax.sql.DataSource;

 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Repository;

 /**
  * @author �½�
  * @������dao������
  * 2018-10-25����2:54:57
  */
 @Repository
 public class BaseDao {
     private final static Logger logger = LoggerFactory.getLogger(BaseDao.class);
     @Autowired
     private DataSource dataSource;
     //��ȡ���ݿ�����
     public Connection getConnection() {
         try {
             return dataSource.getConnection();
         } catch (SQLException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
         return null;
     }
     //��ѯͨ�÷���
     public List<Map<String,Object>> executeQuery(String sql,Object...params) {
         List<Map<String,Object>> objList= new ArrayList<Map<String,Object>>();
         Connection conn = getConnection();
         PreparedStatement ps=null;
         ResultSet rs=null;
         try {
              ps = conn.prepareStatement(sql);
              ps = setParams(ps, params);
              //ִ��sql
               rs = ps.executeQuery();
               //��ȡ��Ԫ������Ϣ
               ResultSetMetaData metaData = rs.getMetaData();
               //���������
               while(rs.next()){
                   Map<String,Object> row= new HashMap<String, Object>();
                   //metaData.getColumnCount()��ȡ����
                   for (int i = 0; i < metaData.getColumnCount(); i++) {
                       row.put(metaData.getColumnLabel(i+1), rs.getObject(i+1));
                   }
                   objList.add(row);
               }
         } catch (SQLException e) {
             e.printStackTrace();
         }finally {
             try {
                 conn.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         return objList;
     }
     //��ɾ��ͨ�÷���
     public boolean executeUpdate(String sql,Object...params) {
         Connection conn = getConnection();
         PreparedStatement ps=null;
         try {
              ps = conn.prepareStatement(sql);
              ps = setParams(ps, params);
              //ִ��sql
               int ret = ps.executeUpdate();
               if(ret>0){
                   logger.info("�����ɹ�");
                   return true;
               }else
               {
                   logger.info("����ʧ��");
                   return false;
               }
         } catch (SQLException e) {
             e.printStackTrace();
         }finally {
             try {
                 conn.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         return false;
     }

     //订单返回
     public Integer executeUpdateGetPK(String sql,Object...params) {
         Connection conn = getConnection();
         PreparedStatement ps=null;
         try {
              ps = conn.prepareStatement(sql,Statement.RETURN_GENERATED_KEYS);
              ps = setParams(ps, params);
              //ִ��sql
               int ret = ps.executeUpdate();
               ResultSet set1 = ps.getGeneratedKeys();
               while(set1.next()){
                     return set1.getInt(1);
                }

         } catch (SQLException e) {
             e.printStackTrace();
         }finally {
             try {
                 conn.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         return null;
     }
     //��ֵͨ�÷���
     public  PreparedStatement setParams(PreparedStatement ps,Object...params) {
             if(params!=null){
                 for (int i = 0; i < params.length; i++) {
                     try {
                         ps.setObject(i+1, params[i]);
                     } catch (SQLException e) {
                         e.printStackTrace();
                     }
                 }
             }
             return ps;
     }
 }