jdbc查询数据库返回实体对象集合

                       

最近做prefuse中用到原始的数据库查询

     try {             ResultSet rs = null;             String hqltonode="SELECT * FROM report_result_external where device_name='"+m_text+"'";              rs = con.prepareStatement(hqltonode).executeQuery();//查询             String manage_key="";             if (rs.next()) {             manage_key=rs.getString("manage_key");            }            // System.out.println( "manage_key"+manage_key);              String sql="SELECT * FROM layout WHERE device_name="+"'"+m_text+"' and manage_key='"+manage_key+"'";            List<String>device_name=new ArrayList<String>();//查询结果集合            rs = con.prepareStatement(sql).executeQuery();//查询            String returnde_na="";            while (rs.next()) {             System.out.println("查询数据库的数据="+returnde_na);              returnde_na= rs.getString("device_name");        }
    
    
    
    

     
     
     
     
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