Java中checkbox实现跨页多选的方法

最近要实现一个功能，就是checkbox跨页多选，在网上看了一下，资料很少，而且大多是不完全的。不过经过我的努力，终于做出来了。

JSP页面:

1,定义三个Hidden变量:

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

2,javascript

// 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;
             }
           }
         }
       }
     }
    }  

每次翻页的时候调用getCheckBoxInformation()方法,页面加载的时候调用initPage()方法.

在后台，每次翻页时调用方法

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;
  } 

将此方法返回的all_select再传到JSP页面上并赋值给那个隐藏域,到此，功能就实现了。

以上所述是小编给大家介绍的Java中checkbox实现跨页多选的方法，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对我们网站的支持！