java 连接oracle数据库

Posted 2020-08-15 猫儿爹

package shujuku;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class basedao {

    Connection conn=null;
    PreparedStatement ps;
    ResultSet rs=null;
    int rs1;
    
    public void getConnection()
      {
        try{
            //class.name 加载驱动
            Class.forName("oracle.jdbc.driver.OracleDriver");
            //获取数据库链接
            conn=DriverManager.getConnection("jdbc:oracle:thin:@20.12.2.50:1521:ora11g","lzt02","1");
            
            
        }catch(ClassNotFoundException e){e.printStackTrace();}
        catch(Exception e){e.printStackTrace();
        }
        //if(conn!=null){System.out.println("数据库链接成功");}
      }
    //关闭链接
    public void closeall()
     {
        try{
            
            if(rs!=null)
               {
                rs.close();
                
               }
            if(ps!=null)
               {
                ps.close();
                
               }
            
            if(conn!=null)
                 {
                conn.close();
                 }
        }catch(Exception e ){}
        
     }
    
    
    //执行操作
    public ResultSet execute(String sql,Object[] params,int flag)
       {
        getConnection();
        try{
            ps=conn.prepareStatement(sql);
            if(params !=null)
              {
                for(int i=0;i<params.length;i++)
                  {
                    
                    ps.setObject(i+1, params[i]);
                    
                  }
                
                
              }
            
            if(flag==0){
                rs=ps.executeQuery();
            return rs;}
            else if(flag==1){
                rs1=ps.executeUpdate(sql);
                if(rs1==1){System.out.println("插入成功");}
            }
            
        }catch(SQLException e){e.printStackTrace();}
        
        return null;
       }
    
    
//    public static void main(String[] args) {
//        // TODO Auto-generated method stub
//        basedao bd=new basedao();
//        bd.getConnection();
//    }

}