java链接db2

链接方法：

1、安装java（配置环境变量）

2、拷贝jar包

import java.sql.*;
class dbconnect
{
   //链接db2
   public static Connection connect(String url,String user,String pass)
   {
     Connection conn =null;
     try
            {
      conn = DriverManager.getConnection(url,user,pass);
   }catch(Exception e){
            System.out.println(e.getMessage());}
      return conn;
   }

   //关闭链接
   public static void allclose(Connection conn,ResultSet rs,PreparedStatement ps)
      {
            if(conn != null) {
            try {
                  conn.close();
             } catch(Exception e) { e.printStackTrace();
            }
   try {
                   rs.close();
             } catch(Exception e) { e.printStackTrace();
            }
   try {
                   ps.close();
            } catch(Exception e) { e.printStackTrace();
   }
    conn = null;
     } 
   }
      public static void main(String[] args)
       {
            try
              {
   
               Class.forName("com.ibm.db2.jcc.DB2Driver").newInstance();
               String url="jdbc:db2://127.0.0.1:50000/DBFLOW";
               String user="db2admin";
               String password="password";
               Connection conn=null;
      conn  = connect(url,user,password);
               if(conn !=null)
      {
                       System.out.println("恭喜你链接成功！");
      }

               // your code
      PreparedStatement   ps=conn.prepareStatement("select   *  from   OA_FLOWDAILYDATA");
               ResultSet   rs=ps.executeQuery();
               while(rs.next())
               {
                       System.out.println( "user_no="+rs.getString("FORMID"));                  
               }
      //end your code
               allclose(conn,rs,ps);
      System.out.println("恭喜你关闭成功！");
               }catch(Exception sqle)
               {
               System.out.print(sqle);
              }
     }
}