jsp使用

1.解决用户浏览器缓存问题，前台在jsp中使用request

<%request.setCharacterEncoding("utf-8");request.setAttribute("path",request.getContextPath());request.setAttribute("cssVersion",1);request.setAttribute("jsVersion",6);
//要用到js地方使用 通过版本保证更新
<script type="text/javascript" src="${path}/js/reim/expense.js?${jsVersion}"></script>request.setAttribute("title","GIP");request.setAttribute("vEnter", "\n");request.setAttribute("USER_TYPE_ADMIN", 99);request.setAttribute("USER_TYPE_MARKET_MANAGER", 20);request.setAttribute("USER_TYPE_MARKET", 22);request.setAttribute("USER_TYPE_PARTNER", 9);
%>

2.提交表单之前验证某些选项方法

 <form class="form-horizontal" action="${path}/reim/submitTask.d" onsubmit="return checkForm();" method="POST"><input type="hidden" name="type" value="2"><input type="hidden" name="taskId" value="${taskId}"><input class="btn blue" type="submit" name="outcome">
</form>
//通过点击事件方法进行验证
<script>function checkForm(){var comment = $('#comment').val();if(comment == ''){alert('请输入备注说明！');return false;}return true;}
</script>

3. jsp通过js获取后台传给前台的值

后台传给前台的方法

String rulemodeid=req.getParameter("rulemodeid");
req.setAttribute("rulemodeid", rulemodeid);

前台js的方法

var rulemodeid= "${rulemodeid }";

其中“”是必须加的，不然报defined错

 checkbo根据后台参数选中

<div class="layui-input-block"  required lay-verify="required"><input type="checkbox" name="size" title="XS" value="XS" ><input type="checkbox" name="size" title="S" value="S"><input type="checkbox" name="size" title="M"  value="M"><input type="checkbox" name="size" title="L" value="L"><input type="checkbox" name="size" title="XL" value="XL"><input type="checkbox" name="size" title="XXL" value="XXL"><input type="checkbox" name="size" title="XXXL" value="XXXL">
</div><script>var str= "${size}";$(str.split(",")).each(function (i,e){$("input[name='size'][value='"+e+"']").prop("checked",true);});
</script>