How to implement cross-page multi-selection using checkbox in Java

<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;
  }