60.商品项目（批量删除）

1.页面开发

全选钮功能

<script type="text/javascript">
    //全选复选框功能实现
    function allClick() {
        //获得当前点击后全选按钮的状态
        var flag = $("#all").prop("checked");
        //将此状态赋值给下面五个复选框
        $("input[name='ck']").each(function () {
            this.checked = flag;
        });
    }

    //单个复选框点击改变全选复选框功能实现
    function ckClick() {
        //得到下面五个复选框的个数
        var fiveLength = $("input[name='ck']").length;
        //得到下面五个复选框被选中的个数
        var checkedLength = $("input[name='ck']:checked").length;
        //进行对比,改变全选复选框的状态
        if(fiveLength == checkedLength){
            $("#all").prop("checked",true);
        }else{
            $("#all").prop("checked",false);
        }
    }
</script>

2.mapper层实现

将被选中的商品的pid拼接成字符串，比如"1,4,5"上传到服务器端

<delete id="deleteBatch" >
    delete from product_info where p_id  in
    <foreach collection="array" item="pid" separator="," open="(" close=")">
        #{pid}
    </foreach>
  </delete>

3.service层实现

@Override
    public int deleteBatch(String[] ids) {
        return productInfoMapper.deleteBatch(ids);
    }

4.controller开发

//批量删除商品
    @RequestMapping("/deleteBatch")
    //pids="1,4,5"  ps[1,4,5]
    public String deleteBatch(String pids,HttpServletRequest request){
        //将上传上来的字符串截开,形成商品id的字符数组
        String []ps = pids.split(",");

        try {
            int num = productInfoService.deleteBatch(ps);
            if(num > 0 ){
                request.setAttribute("msg","批量删除成功!");
            }else{
                request.setAttribute("msg","批量删除失败!");
            }
        } catch (Exception e) {
            request.setAttribute("msg","商品不可删除!");
        }
        return "forward:/prod/deleteAjaxSplit.action";
    }
}

批量删除结束后应该跳到deleteAjaxSplit分页上，再回到当前页面上

deleteAjaxSplit控制器那里必须有@ResponseBody表明ajax在这里进行返回

5.ajax批量删除页面判断提示

 //批量删除
    function deleteBatch() {
        //得到所有选中复选框的对象,根据其长度判断是否有选中商品
        var cks = $("input[name='ck']:checked");  //1,4,5
        //如果有选中的商品
        if(cks.length == 0){
            alert("请先选择将要删除的商品!");
        }else{
            var str = "";
            var pid = "";
            if(confirm("您确定要删除"+cks.length+"条商品吗?")){
               // alert("可以进行删除!");
                //获取其value的值,进行字符串拼接
                $.each(cks,function () {
                    pid = $(this).val();
                    //进行非空判断,避免出错
                    if(pid != null){
                        str += pid+",";  //145   ===>1,4,5,
                    }
                });

                //发送ajax请求,进行批量删除的提交
                $.ajax({
                    url:"${pageContext.request.contextPath}/prod/deleteBatch.action",
                    data:{"pids":str},
                    type:"post",
                    dataType:"text",
                    success:function (msg) {
                        alert(msg);//批量删除成功!失败!不可删除!
                        //将页面上显示商品数据的容器重新加载
                        $("#table").load("http://localhost:8080/admin/product.jsp #table");
                    }
                });
            }
        }
    }