lyb.java

留言板可以留言有登陆注册会员功能是2个bean组成的

package tom;
import java.sql.*;
public class Lyb
{String  logname="",
         message="";
    String backNews;//用来留言是否成功。
    Connection con;
    Statement sql; 
    ResultSet rs;
    public Lyb()
    {  //加载桥接器：
       try{Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
          }
       catch(ClassNotFoundException e){}
    }
  //设置属性值、获取属性值的方法：
   public void setLogname(String name)
    {  logname=name;
    }
   public String getLogname()
    {return logname;
    }
   public String getMessage()
    {return message;
    } 
   public void setMessage(String m)
    { message=m;
    } 
   public String getBackNews()
    {return backNews;
    }
   public void setBackNews(String s)
    {backNews=s;
    } 

   public void addItem()
    {try{
        con=DriverManager.getConnection("jdbc:odbc:liuyan","","");
        sql=con.createStatement();
        String s="'"+logname+"'"+","+"'"+message+"'";
        String condition="INSERT INTO wordpad VALUES"+"("+s+")";
        sql.executeUpdate(condition);
        backNews="添加成功了";
        con.close();
       }
     catch(SQLException e)
      {//由于表wordpad和member表通过字段logname做了关联，所以如果输入的logname
        //不对，就会出现异常
        backNews="你没有登录，不能留言";
       }
    }
}