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