最近项目需要,因为时间问题我用最简单的方法做了一个查询分页+CheckBox的全选提交,我觉得非常适合小项目和类似邮件列表的功能.下面贴出我的代码,希望朋友们多给我提毛病.
主要代码都写在JSP里.下面是一个apply_note.jsp:
<%@page contentType="text/html;charset=GBK" language="java"%>
<%@ page import="java.sql.*"%>
<%@ page import="com.deepdo.common.connect.ConSql"%>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<style type=text/css>
td,th,p,span,div,a,A {font-size:12px;text-decoration:none}
.blak a {color:#000; text-decoration:none}
.blak a:hover {color:#f00; text-decoration:underline}
</style>
<body>
<jsp:include page="/include/deepdo.jsp" flush="true"/>
<table width="700" border="0" align="center" cellpadding="0" cellspacing="0" height="450">
<tr>
<td valign="top" class="bg_td1" height="450" width="160">
<jsp:include page="/include/navigation.jsp" flush="true"/>
</td>
<td valign="top" class="bg_td1" height="450" width="540">
<table width="590" border="0" align="center" cellpadding="2" cellspacing="2" bgcolor="#FAF9F5">
<tr>
<td background="resume/images/color.jpg" class="font4"> <img src="resume/images/dot.gif">
工作申请记录</td>
</tr>
</table>
<table width="590" border="0" align="center" cellpadding="4" cellspacing="2">
<%
//变量声明
Connection sqlCon; //数据库连接对象
Statement sqlStmt; //SQL语句对象
ResultSet sqlRst; //结果集对象
String strCon; //数据库连接字符串
String strSQL; //SQL语句
int intPageSize; //一页显示的记录数
int intRowCount; //记录总数
int intPageCount; //总页数
int intPage; //待显示页码
String strPage;
int i;
//设置一页显示的记录数
intPageSize = 10;
//取得待显示页码
strPage = request.getParameter("page");
if(strPage==null){//表明在QueryString中没有page这一个参数，此时显示第一页数据
intPage = 1;
}
else{//将字符串转换成整型
intPage = java.lang.Integer.parseInt(strPage);
if(intPage<1) intPage = 1;
}
//获取一个TOMCAT配置的连接池
sqlCon = ConSql.getCon();
//创建一个可以滚动的只读的SQL语句对象
sqlStmt = sqlCon.createStatement(java.sql.ResultSet.TYPE_SCROLL_INSENSITIVE,java.sql.ResultSet.CONCUR_READ_ONLY);
//准备SQL语句
strSQL = "select * from apply_note where userid="+request.getAttribute("userid");
//执行SQL语句并获取结果集
sqlRst = sqlStmt.executeQuery(strSQL);
//获取记录总数
sqlRst.last();
intRowCount = sqlRst.getRow();
//记算总页数
intPageCount = (intRowCount+intPageSize-1) / intPageSize;
//调整待显示的页码
if(intPage>intPageCount) intPage = intPageCount;
%>
<tr>
<td align="center" bgcolor="#efefef" width="150" height="27">已经申请过的职位</td>
<td align="center" bgcolor="#efefef" width="140" height="27">公司名称</td>
<td align="center" bgcolor="#efefef" width="75" height="27">申请时间</td>
<td align="center" bgcolor="#efefef" width="25" height="27"><input type=CheckBox name="selectAll" onClick="selectAll();"></td>
</tr>
<%
if(intPageCount>0){
//将记录指针定位到待显示页的第一条记录上
sqlRst.absolute((intPage-1) * intPageSize + 1);
//显示数据
i = 0;
while(i<intPageSize && !sqlRst.isAfterLast()){
%>
<form name ="noteForm" action="noteRemove.do" method="post">
<tr>
<td><a href=<%=sqlRst.getString("url")%> target="_blank"><%=sqlRst.getString("job")%></a></td>
<td><%=sqlRst.getString("unit")%></td>
<td><%=sqlRst.getString("date_time")%></td>
<td width="26" align="center"><input type=CheckBox name="id" value=<%=sqlRst.getString("id")%>></td>
</tr>
<%
sqlRst.next();
i++;
}
}
%>
<tr>
<td>
<a href="note.do?page=1">首页</a>
<%if(intPage>1){%><a href="note.do?page=<%=intPage-1%>">上一页</a><%}
else {%><a href="#" title="已经是第一页">上一页</a><%}%>
<%if(intPage<intPageCount){%><a href="note.do?page=<%=intPage+1%>">下一页</a><%}
else {%><a href="#" title="已经是最后一页">下一页</a><%}%>
<a href=note.do?page=<%=intPageCount%>>末页</a>
</td>
<td>
共 <%=intPageCount%> 页申请记录
当前为第 <%=intPage%> 页
</td>
<td> </td>
<td align="center"><input type="submit" value="删除" onClick="manageSubmit();"></td>
<input type="hidden" name="checkvalue" value="">
</tr>
</form>
<%
//关闭结果集
sqlRst.close();
//关闭SQL语句对象
sqlStmt.close();
//关闭数据库
sqlCon.close();
%>
</table>
</td>
</tr>
</table>
<jsp:include page="/include/tail.html" flush="true"/>
</body>
<script language="javascript">
function manageSubmit(){
var ChkEls=document.getElementsByName("Id");
var checkedIds="";
for(var i=0;i<ChkEls.length;i++){
if(ChkEls.item(i).type != "checkbox")continue;
var oEl = ChkEls.item(i);
if(oEl.checked) {
checkedIds = checkedIds + (oEl.value + ",");
}
}
document.noteForm.checkvalue.value = checkedIds;
if ( checkedIds == "" ) return false;
return true;
}
function selectAll(){
var ChkEl = document.getElementsByName("selectAll").item(0);
var ChkEls=document.getElementsByName("Id");
for(var i=0;i<ChkEls.length;i++){
if(ChkEls.item(i).type != "checkbox")continue;
var oEl = ChkEls.item(i);
oEl.status=ChkEl.status;
}
}
</script>
</html>
下面是一个Action,基本没处理业务逻辑,就是从Cookie里获得了用户的id.
NoteAction.java
package com.deepdo.apply.action;
import java.util.Map;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.deepdo.apply.form.NoteForm;
import com.deepdo.common.cookie.CookieUtil;
public class NoteAction extends Action{
public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response) {
NoteForm noteForm = (NoteForm) form;
String page = noteForm.getPage();
String userid = null;
String deepid = null;
String ddsessid = null;
String fettle = null;
//获取Cookie中用户的id
Map map = null;
Cookie[] cookies = request.getCookies();
if(cookies!=null){
int useCook = 0;
for(int i = 0; i < cookies.length; i++){
if((cookies[i].getName()).equals("DEEPDOID")){
deepid = cookies[i].getValue();
useCook++;
}
if((cookies[i].getName()).equals("DDOSESSID")){
ddsessid = cookies[i].getValue();
useCook++;
}
}
if(useCook==2){
map = CookieUtil.getCookie(deepid,ddsessid);
if(map!=null){
userid=(String)map.get("userid");
fettle=(String)map.get("purview");
int in = Integer.valueOf(fettle).intValue();
if(in <= 0) {
return mapping.findForward("control");
}
}
}
}
System.out.println("从Cookie中获取的username是"+userid);
if(userid==null) {
System.out.println("用户未登陆");
return mapping.findForward("forward");
}
request.setAttribute("page",page);
request.setAttribute("userid",userid);
return mapping.findForward("apply_note");
}
}
这样处理分页感觉超级简单,这个Action就是起到了一个中转的作用,没有实际业务功能,如果没有他,那个JSP只需要修改一下上下页的连接地址为本身.就可以自己实现查询分页功能.JSP页最后的两个JS方法是负责处理CheckBox全选和,和提交CheckBox的值为的问题的方法.希望朋友们帮忙指点一下我代码中的不足,互相学习互相进步.
