jsp

例如，从数据库读到的EL表达式的时间形式为Thu Aug 03 23:13:49 CST 2023

在jsp这边用<script>将获得的EL表达式修改为类似“2023年 8月 03日 时间:23:13:49 星期四”形式展现在网页上

<c:forEach items="${sessionScope.SecurityManagementlist}" var="sm">
<h4 style="display: inline-block;">上次登记时间:<h4 id="all" style="display: inline-block"></h4>

                 <script type="text/javascript">
                    var date2 ="${sm.datetime}";
                    var stringmonth ="";
                    // console.log(string); // 输出
                    // 总共28个字

                    // let stringdate = date2.substring(0, 28); // 使用substring方法
  

                    let stringyear= date2.substring(24, 28); // 使用substring方法
                    // let stringmonth = date2.substring(4, 7); // 使用substring方法
                    let stringday = date2.substring(8, 10); // 使用substring方法
                    let stringconcretetime= date2.substring(11, 19); // 使用substring方法
                    let stringweek = date2.substring(0, 3); // 使用substring方法

                    if (date2.substring(4, 7)=="Jan"){
                        stringmonth="1";
                    }else if(date2.substring(4, 7)=="Feb"){
                        stringmonth="2";
                    }else if(date2.substring(4, 7)=="Mar"){
                        stringmonth="3";
                    }else if(date2.substring(4, 7)=="Apr"){
                        stringmonth="4";
                    }else if(date2.substring(4, 7)=="May"){
                        stringmonth="5";
                    }else if(date2.substring(4, 7)=="Jun"){
                        stringmonth="6";
                    }else if(date2.substring(4, 7)=="Jul"){
                        stringmonth="7";
                    }else if(date2.substring(4, 7)=="Aug"){
                        stringmonth="8";
                    }else if(date2.substring(4, 7)=="Sep"){
                        stringmonth="9";
                    }else if(date2.substring(4, 7)=="Oct"){
                        stringmonth="10";
                    }else if(date2.substring(4, 7)=="Nov"){
                        stringmonth="11";
                    }else if(date2.substring(4, 7)=="Dec"){
                        stringmonth="12";
                    }


                    if (date2.substring(0, 3)=="Mon"){
                        stringweek="一";
                    }else if(date2.substring(0, 3)=="Tue"){
                        stringweek="二";
                    }else if(date2.substring(0, 3)=="Wed"){
                        stringweek="三";
                    }else if(date2.substring(0, 3)=="Thu"){
                        stringweek="四";
                    }else if(date2.substring(0, 3)=="Fri"){
                        stringweek="五";
                    }else if(date2.substring(0, 3)=="Sat"){
                        stringweek="六";
                    }else if(date2.substring(0, 3)=="Sun"){
                        stringweek="日";
                    }



                    let stringall = date2.substring(24, 28)+"年 "+stringmonth+"月 "+date2.substring(8, 10)+"日  时间:"+date2.substring(11, 19)+"  星期"+stringweek;

                    
                    var all = document.getElementById("all");


                    

                    // 创建一个新的段落元素
                    var p1 = document.createElement("p");
                    // 设置段落文本内容
                    p1.textContent = stringall;


                    // 将列表添加到容器中
                    all.appendChild(p1);
                </script>
            </h4>
</c:forEach>

Servlet

例如，首先在Servlet里用Date获取当地时间，

然后用string将时间修改为类似“2023年 8月 03日 时间:23:13:49 星期四”形式写进数据库的表里面

                Date date1=new Date();
                System.out.print(date1);
                String date2 =String.valueOf(date1);

                // console.log(string); // 输出
                // 总共28个字

                System.out.print(date2);
                String stringyear= date2.substring(24, 28); // 使用substring方法
                String stringmonth = date2.substring(4, 7); // 使用substring方法
                String stringday = date2.substring(8, 10); // 使用substring方法
                String stringconcretetime= date2.substring(11, 19); // 使用substring方法
                String stringweek = date2.substring(0, 3); // 使用substring方法

                switch (date2.substring(4, 7)) {
                    case "Jan":
                        stringmonth = "1";
                        break;
                    case "Feb":
                        stringmonth = "2";
                        break;
                    case "Mar":
                        stringmonth = "3";
                        break;
                    case "Apr":
                        stringmonth = "4";
                        break;
                    case "May":
                        stringmonth = "5";
                        break;
                    case "Jun":
                        stringmonth = "6";
                        break;
                    case "Jul":
                        stringmonth = "7";
                        break;
                    case "Aug":
                        stringmonth = "8";
                        break;
                    case "Sep":
                        stringmonth = "9";
                        break;
                    case "Oct":
                        stringmonth = "10";
                        break;
                    case "Nov":
                        stringmonth = "11";
                        break;
                    case "Dec":
                        stringmonth = "12";
                        break;
                }


                switch (date2.substring(0, 3)) {
                    case "Mon":
                        stringweek = "一";
                        break;
                    case "Tue":
                        stringweek = "二";
                        break;
                    case "Wed":
                        stringweek = "三";
                        break;
                    case "Thu":
                        stringweek = "四";
                        break;
                    case "Fri":
                        stringweek = "五";
                        break;
                    case "Sat":
                        stringweek = "六";
                        break;
                    case "Sun":
                        stringweek = "日";
                        break;
                }



                String stringall = date2.substring(24, 28)+"年 "+stringmonth+"月 "+date2.substring(8, 10)+"日  时间："+date2.substring(11, 19)+"     星期"+stringweek;

                olds.setDatetime(stringall);
                oldsService.insert(olds);