[code=JSP][/code]
<c:forEach begin="1" end="2" step="1">
<%
Random random=new Random();
session.setAttribute("number1",random.nextInt(101));
session.setAttribute("number2",random.nextInt(101));
session.setAttribute("operator",random.nextInt(4));
int i=1;
String name1="number1"+i;
String name2="number2"+i;
String result="result"+i;
String operator="operator"+i;
i=i+1;
%>
<%=name1 %>
</c:forEach>
这段代码输入的结果是number11 number11 ,好像“i=i+1;”这个没有执行,请各位帮忙解释一下!
<c:forEach begin="1" end="2" step="1">
<%
Random random=new Random();
session.setAttribute("number1",random.nextInt(101));
session.setAttribute("number2",random.nextInt(101));
session.setAttribute("operator",random.nextInt(4));
int i=1;
String name1="number1"+i;
String name2="number2"+i;
String result="result"+i;
String operator="operator"+i;
i=i+1;
%>
<%=name1 %>
</c:forEach>
这段代码输入的结果是number11 number11 ,好像“i=i+1;”这个没有执行,请各位帮忙解释一下!
<%!
int i = 1;
%>
然后
<c:forEach begin="1" end="2" step="1">
<%
Random random=new Random();
session.setAttribute("number1",random.nextInt(101));
session.setAttribute("number2",random.nextInt(101));
session.setAttribute("operator",random.nextInt(4));
String name1="number1"+i;
String name2="number2"+i;
String result="result"+i;
String operator="operator"+i;
i=i+1;
%>
<%=name1 %>
</c:forEach>
<%
session.setAttribute("problemSum",Integer.parseInt(request.getParameter("problemSum")));
%>
<form action="statistics.jsp" method="post">
<table border="1">
<%
int i=1;
%>
<c:forEach begin="1" end="${problemSum}" step="1">
<%
Random random=new Random();
session.setAttribute("number1",random.nextInt(101));
session.setAttribute("number2",random.nextInt(101));
session.setAttribute("operator",random.nextInt(4));
String name1="number1"+i;
String name2="number2"+i;
String result="result"+i;
String operator="operator"+i;
i=i+1;
%>
<tr>
<td><input type="hidden" name=name1 id=name1 value="${number1 }">${number1 }</td>
<td>
<c:choose>
<c:when test="${operator==0}"><input type="hidden" name=operator id=operator value="+">+</c:when>
<c:when test="${operator==1}"><input type="hidden" name=operator id=operator value="-">-</c:when>
<c:when test="${operator==2}"><input type="hidden" name=operator id=operator value="*">*</c:when>
<c:when test="${operator==3}"><input type="hidden" name=operator id=operator value="/">/</c:when>
</c:choose>
</td>
<td><input type="hidden" name=name2 id=name2 value="${number2}">${number2}</td>
<td>=</td>
<td><input type="text" name=result id=result> </td>
</tr>
<%=name1 %>
</c:forEach>
<tr>
<td colspan="5" align="center"><input type="submit" name="ok" value="提交"></td>
</tr>
</table>
</form>
这个我找到了, 那么上面的这段代码问题是不是出在上面为红色的“NAME1”上啊,我再另一个页面只能取到第一个式子中的数值。
<c:forEach begin="1" end="2" step="1">
<%
Random random=new Random();
session.setAttribute("number1",random.nextInt(101));
session.setAttribute("number2",random.nextInt(101));
session.setAttribute("operator",random.nextInt(4));
String name1="number1"+i;
String name2="number2"+i;
String result="result"+i;
String operator="operator"+i;
i=i+1;
%>
<%=name1 %>
</c:forEach>