Java中checkbox实现跨页多选的方法

<INPUT type="hidden" name="all_selected">  <INPUT type="hidden" name="now_selected">  <INPUT type="hidden" name="no_selected">  

// 获取checkbox信息,选中,未选中,当前选中      function getCheckBoxInformation() {       var checkboxes = document.getElementsByName("checkbox");       var checkedStr = "";       var uncheckedStr = "";       var url = "";       for(var i = 0; i < checkboxes.length; i++) {         var checkbox = checkboxes[i];         if(checkbox.checked) {          checkedStr = checkedStr + "," + checkbox.value;        }else {          uncheckedStr = uncheckedStr + "," + checkbox.value;        }      }      document.form1.now_selected.value = checkedStr;      document.form1.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() {       var all_selected = document.form1.all_selected.value;       if(all_selected != "" && all_selected!= null) {         var arrall_select = all_selected.split(",");         if(arrall_select.length > 0) {           for(var k = 0; k < arrall_select.length; k++) {              for(var i = 0; i < document.form1.checkbox.length; i++) {                 if(document.form1.checkbox[i].value == arrall_select[k]) {                 document.form1.checkbox[i].checked = true;                }              }           }          }        }      }  

public String doubleSpread(String all_select, String now_selected, String no_selected) {     //获取当前选中的项目加入al     List al = new ArrayList();     if(all_select != "" && all_select != null)     {       String[] all_select_str = all_select.split(",");       for(int a=0;a<all_select_str.length;a++)       {         al.add(all_select_str[a]);       }     }     //将当前选中项目加入列表     if (now_selected != "" && now_selected != null) {       String[] all_now_select = now_selected.split(",");       for (int i = 1; i < all_now_select.length; i++) {         if (!al.contains(all_now_select[i])) {           al.add(all_now_select[i]);         }       }     }     //将当前未选中项目从列表中删除     if (no_selected != "" && no_selected != null) {       String[] all_now_no_select = no_selected.split(",");       for (int i = 1; i < all_now_no_select.length; i++) {         if (al.contains(all_now_no_select[i])) {           al.remove(all_now_no_select[i]);         }       }     }     all_select=al.toString().replaceAll(" +","");;     all_select=all_select.substring(1,all_select.length()-1)+",";     return all_select;   }