java实现checkbox翻页选择

java实现checkbox翻页选择2008-11-21 21:24以前在网上看到jcheckbox翻页选择的话题很热,讨论也很多,这次由于项目需要,我用java实现了这个话题,在这里与大家共享.
JSP页面:
1,定义三个Hidden变量:
<html:hidden name="form" property="all_selected"/>
String now_select = (String) form.get("now_select");
String[] all_now_select = now_select.split(",");
//获取当前未选中项目
String no_select = (String)form.get("no_select");
String[] all_now_no_select = no_select.split(",");
//将当前选中项目加入列表
for (int i = 1; i < all_now_select.length; i++) {
String strBoxSelected = all_now_select[i];
private void operationCheckInfo(Map map, Map form, HttpServletRequest request) {
HttpSession session = request.getSession(false);
//flag判断是否是翻页操作
if (request.getParameter("flag") != null && request.getParameter("flag").equals("CHECKED")) {
function getCheckBoxInformation() {
var checkboxes = document.getElementsByName("checkbox");
var checkedStr = "";
var uncheckedStr = "";
for(i = 0; i < checkboxes.length; i++) {
if (iSearchIndex != -1) {
all_select = all_select.replaceAll(strSearchWith, "");
}
}
//将所有被选择项加入session
session.setAttribute("SESSION_CHECKBOX", all_select);
for(k = 0; k < arrall_select.length; k++) {
for(i = 0; i < document.all.che_seq.length; i++) {
if(document.forms[0].checkbox[i].value == arrall_select[k]) {
for (int i = 1; i < all_now_no_select.length; i++) {
String strBoxNoselected = all_now_no_select[i];
String strSearchWith = strBoxNoselected + ",";
int iSearchIndex = all_select.indexOf(strSearchWith);
<html:hidden name="form" property="now_selected"/>
<html:hidden name="form" property="no_selected"/>
看到名字大家应该知道是做什么用的,在这里不多解释.
2,javascript
// 获取checkbox信息,选中,未选中,当前选中
}
}
document.forms[0].now_selected.value = checkedStr;
document.forms[0].no_selected.value = uncheckedStr;
}
// 页面onload的时候计算当前页被选中项,并在页面表示
function initPage() {
document.forms[0].checkbox[i].checked = true;
}
}
}
}
}
} 每次翻页的时候调用getCheckBoxInformation()方法,页面加载的时候调用initPage()方法.
3,后台Action操作,在每次执行时候调用下面的方法
String strSearchWith = strBoxSelected + ",";
if (all_select.indexOf(strSearchWith) == -1) {
all_select = all_select + strSearchWith;
}
}
//将当前未选中项目从列表中删除
var checkbox = checkboxes[i];
if(checkbox.checked) {
checkedStr = + checkbox.value;
}else {
uncheckedStr = uncheckedStr + "," + checkbox.value;
var all_selected = document.forms[0].all_select.value;
if(all_selected != "" && all_select ed!= null) {
var arrall_select = all_selected.split(",");
if(arrall_select.length > 0) {
String all_select = (String) session.getAttribute("SESSION_CHECKBOX");
if (all_select == null || all_select.equals("")) {
all_select = "";
}
//获取当前选中的项目
map.put("all_select", all_select);
} else {
//不是翻页的场合,将session清空
session.removeAttribute("SESSION_CHECKBOX");
}
}