別不信！servlet獲取到的參數值，也許徹底出於你的意料！

時間 2019-12-14

原文原文鏈接

先貼出來簡單得不能再簡單的demo頁面效果：javascript

以下是spring mvc的Controller：html

@RequestMapping("mytest")
@Controller
public class ZhangTestController {

    private Logger log = LogManager.getLogger();

    @RequestMapping(value = "toCancel")
    public String toCancel( HttpServletRequest request, HttpServletResponse response, String orderNo){
        log.info("orderNo={}",orderNo);
        request.setAttribute("orderNo", null);
        return "mytest/toCancel";
    }
}

以下toCancel.jsp頁面，java

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<%@ page contentType="text/html;charset=UTF-8" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <script type="text/javascript" src="${pageContext.request.contextPath}/static/yimei/js/jquery-1.10.2.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {

            $("#chargeQuery").click(function () {
                $("#inputForm").submit();
            });

        });

    </script>
</head>
<body>
    <form id="inputForm" action="" method="post" class="form-horizontal">
        <input type="text" name="orderNo" id="orderNo" value="${orderNo}"/>
    </form>
    <span class="buyer  pay-credit" id="chargeQuery">取消訂單</span>
</body>

</html>