字典表与列表框的讨论
Thursday May 17, 2007在最近的一个小系统里要加入一个功能,一个列表框,数据从数据库的字典表中取得,研究了一下,实现了,记录下
只显示一个字段的内容,我采用Vector来实现,代码如下
package com.xx.work.data; import java.sql.ResultSet; import java.sql.SQLException; import java.util.Vector; import com.aheadsoft.work.dao.DBConnect; public class Add { private int ID; private String workType; public int getID() { return ID; } public void setID(int id) { ID = id; } public String getWorkType() { return workType; } public void setWorkType(String workType) { this.workType = workType; } public Add(){ ID = 0; workType = ""; } public Add(int ID, String workType){ this.ID = ID; this.workType = workType; } public void setID(String newID) { if (newID != null) this.ID = Integer.parseInt(newID); } public static Vector excute() throws Exception{ Vector list = new Vector(); String Str = "select * from workType"; DBConnect dbc = null; ResultSet rs = null; try { dbc = new DBConnect(); try{ rs = dbc.executeQuery(Str); while (rs.next()) { Add add = new Add(); add.setWorkType(rs.getString("workType")); list.add(add); } }catch(SQLException e){ e.printStackTrace(); }finally{ if(rs != null) rs.close(); } } catch (SQLException e) { e.printStackTrace(); }finally{ if(dbc != null) dbc.close(); } return list; } public static void main(String [] args){ } }
JSP页面实现代码如下
<%@ page import="com.aheadsoft.work.data.Add"%>
//其它略
<select name="workType" style="width: 160; height: 23">
<option selected value="">
选择工作类型
</option>
<%
Vector work = Add.excute();
for(int i=0;i<work.size();i++){
Add add = (Add)work.get(i);
%>
<option><%=add.getWorkType()%></option>
<%}%>
</select>
Besides the fact that some are only there to fill the politically correct quotas but seem totally incapable of fulfilling their duties. ,
You’re stuck with the experience of what it’s like to be a human being. ,