删除 'src/BarDao.java'

src/BarDao.java

@@ -1,99 +0,0 @@
-package com.dao;
-import java.sql.Connection;
-import java.sql.DriverManager;
-import java.sql.PreparedStatement;
-import java.sql.ResultSet;
-import java.sql.SQLException;
-import java.sql.Statement;
-import java.util.ArrayList;
-import java.util.List;
-
-import com.entity.Bar;
-public class BarDao {
-	
-	 
-	
-
-	
-	  public ArrayList<Bar> query(){   //这里的query()方法是将从数据库中读取到的数据存储到集合中
-	   ResultSet rs = null;
-	   Statement st = null;
-	   ArrayList<Bar> barArr=new ArrayList<Bar>();
-		Connection conn = DataBaseUtils.getConnection();
-
-	  try{
-	       
-	  st = conn.createStatement();
-	  rs = st.executeQuery("select * from testbar");
-	   while(rs.next()){
-	    Bar bar=new Bar();
-	    bar.setName(rs.getString("name"));
-	    bar.setNum(rs.getInt("num"));
-	    barArr.add(bar);     //将从数据库中读取到的数据 以bar对象的方式存储到 集合中
-	   }
-	  }catch(SQLException e){
-	   e.printStackTrace();
-	  } 
-	  
-	  return barArr;   //返回该集合
-	  }
-	  
-		/**
-		 * 保存
-		 * @param var1
-		 */
-		public void save(String name,Integer num){
-			String sql = "insert into testbar(name,num) values(?,?)";
-			Connection conn = DataBaseUtils.getConnection();
-			try {
-				PreparedStatement pstmt = conn.prepareStatement(sql);
-				pstmt.setString(1, name);
-				pstmt.setInt(2, num);
-
-				pstmt.executeUpdate();
-			} catch (SQLException e) {
-				e.printStackTrace();
-			}
-		}
-			  
-	  
-	  
-	  
-	  public void update(String name,Integer num){          //该方法用于更新数据
-	   try{
-			Connection conn = DataBaseUtils.getConnection();
-
-	    PreparedStatement ptmt=conn.prepareStatement("update testbar set num=? where name=? ");
-	    ptmt.setInt(1, num);
-	    ptmt.setString(2,name);
-	    ptmt.execute(); 
-	  }catch(SQLException e){
-	   e.printStackTrace();
-	  }
-	   
-	  }
-
-
-
-
-
-
-
-
-/**
- * 根据name删除
- * @param name
- */
-public void del(String name){
-	String sql = "delete from testbar where name=?";
-	Connection conn = DataBaseUtils.getConnection();
-	try {
-		PreparedStatement pstmt = conn.prepareStatement(sql);
-		pstmt.setString(1, name);
-		pstmt.executeUpdate();
-	} catch (SQLException e) {
-		e.printStackTrace();
-	}
-}}
-
-