❶ 給定JSP程序源碼如下:
a和d是表達式,所以有輸出;c和d是java程序片,要想輸出得用java的輸出,所以這里沒有輸出。
a是先加後輸出,d是先輸出後加,所以一個是2,一個是1.
❷ JSP 源代碼編寫 表單操作
<%@ page language="java" import="java.util.*" pageEncoding="GB2312"%>
<html>
<body>
<form action="" method="post">
第一個操作數:<input type="text" name="one"><br>
運算符:<select name="op">
<option value="+">+</option>
<option value="-">-</option>
<option value="*">*</option>
<option value="/">/</option>
</select><br>
第二個操作數:<input type="text" name="two"><br>
<input type="submit" value="提交">
</form>
<hr>
<%
int ones=0;
int twos=0;
double threes=0.0;
String one=request.getParameter("one");
ones=Integer.parseInt(one);
String op=request.getParameter("op");
String two=request.getParameter("two");
twos=Integer.parseInt(two);
out.println(ones);
out.println(op);
out.println(twos);
out.println("=");
if(op=="+")
{
threes=(double)ones+twos;
out.println(threes);
}
else if(op.equals("-"))
{
threes=(double)ones-twos;
out.println(threes);
}
else if (op.equals("/"))
{
if(twos!=0)
{
threes=(double)ones/twos;
out.println(threes);
}
else
out.println("輸入的數據有誤");
}
else
{
threes=(double)ones*twos;
out.println(threes);
}
%>
</body>
</html>
❸ 怎麼在jsp頁面寫折疊
我以前寫個一個例子,希望對你有幫助,上下滑動效果的,裡面兩個方法,一個是展開,一個收收起,put() 為收起,Roll() 為展開,自己配對自己的div,就可以實現你要的效果了
<script type="text/javascript">
function put() {
var put_div = document.getElementById('comment'); 這個是得到第一個div
var puth3 = document.getElementById('put');
var show3 = document.getElementById('show');
put_div.style.height = put_div.offsetHeight + "px";
var slide = setInterval(function() {
if (put_div.offsetHeight <= 410) {
clearInterval(slide);
puth3.style.display = "none";
show3.style.display = "block";
}
put_div.style.height = put_div.offsetHeight - 10 + "px";
}, 16);
}
function Roll() {
var Roll_div = document.getElementById('comment');
var puth3 = document.getElementById('put');
var show3 = document.getElementById('show');
Roll_div.style.height = Roll_div.offsetHeight + "px";
var slide = setInterval(function() {
if (Roll_div.offsetHeight >= 580) {
clearInterval(slide);
show3.style.display = "none";
puth3.style.display = "block";
}
Roll_div.style.height = Roll_div.offsetHeight + 10 + "px";
}, 16);
}
</script>