jsp变量作为javascript函数参数 [英] jsp variable as javascript function parameters

问题描述

使用jsp变量作为javascript参数时遇到麻烦.

I'm having a trouble with using jsp variables as javascript parameters.

javascript函数:

The javascript function:

function user(name, lastname, nick) {
    return name + " " + lastname + " (" + nick + ")";
}

并在jsp中使用它:

<tbody>
<c:forEach var="et" items="${eTestsToAdd}">
    <tr>
        <td><script>document.write(user(${et.author.name}, ${et.author.lastname}, ${et.author.nick}));</script></td>

也可以在另一个示例中使用

Also it works on another example:

js

function parseToDate(dateInMiliseconds) {
    var d = new Date(dateInMiliseconds);
    var string = d.getDay().toString() + "-" + d.getMonth().toString() + "-" + d.getFullYear().toString();
    return string;
}

jsp

<script>document.write(parseToTime(${uc.startDate.time}));</script>

有两个区别，工作示例是带有一个参数的javascript函数且参数为int，而无效的例子是带有三个字符串参数的javasript函数.如何传递这些值以使其起作用? 请不要编写脚本:)

There are two differences, working example is javascript function with one parameter and the parameter is int, and not working one is javasript function with three string parameters. How can I pass those values to have it working? No scriptlets please :)

//编辑

好吧，我会尝试澄清一下:

ok, I'll try to clarify it a little more:

我在jsp中有一个要显示一些数据的表:

I have a table in jsp where some data is to be displayed:

<tbody>
    <c:set var="i" value="0" />
    <c:forEach var="uc" items="${userClasses}">
        <c:set var="i" value="${i+1}" />
        <c:url var="usrURL" value="/users/show/${uc.user.nick}" />
        <tr onclick="location.href = '${usrURL}' ">
            <td>${i}</td>
            <td><img class="img-circle img-little" src="<c:url value='/imageView/${uc.user.avatar.id}'/>" />
                <script>document.write(user(${uc.user.name}, ${uc.user.lastname}, ${uc.user.nick}));</script>
            </td>
            <td><script>document.write(parseToTime(${uc.startDate.time}));</script></td>
        </tr>
                                </c:forEach>
                            </tbody>

uc.user-是用户实体，我想将它很好地写在表中的模式中-

uc.user - is the user entity, I wanted to have it nicely written in the table in pattern -

姓氏(用户名)

使用我在此处发布的JavaScript. 但是，当我在jsp中使用此函数时，tomcat将我抛出org.apache.jasper.JasperException:在我调用js函数的那一行处理JSP页面时发生了异常.所以很明显，我在jsp中以某种方式使用了错误的代码；我很喜欢javascript.我的问题是如何在此处正确使用此javasript函数?

with the javascript I posted here. But when I use this function in jsp, tomcat throws me org.apache.jasper.JasperException: An exception occurred processing JSP page at the line where I call the js function. So obviously, I'm using it wrong in jsp somehow; I'm fresh with javascripts, though. And my question is how to use this javasript function properly here?

推荐答案

我不确定这是不知道eTestsToAdd集合的值是什么的解决方案，但是肯定是 one 问题.

I am not certain that this is the solution without knowing what the values for the eTestsToAdd collection is, however this would certainly be one problem.

给出以下代码片段:

document.write(user(${et.author.name}, ${et.author.lastname}, ${et.author.nick}));

作者的值分别为joe，shmoe，js，这将导致输出

And the values for the author are joe, shmoe, js respectively this would result in this output

document.write(user(joe, shmoe, js));

这是无效的JavaScript，JS评估程序将查找名为joe，schome和js的变量.您需要将输出用引号引起来.

This is invalid javascript, the JS evaluator would look for variables named joe, schome and js. You need to wrap the output in quotes.

document.write(user("${et.author.name}", "${et.author.lastname}", "${et.author.nick}"));

现在，如果有人在名字中输入名称lovemesome"XXS，您还将收到一个JavaScript错误.您将需要清理输出变量，在这种情况下，可以使用以下命令进行处理:

Now if someone puts in the name lovemesome"XXS for the first name you will also get a javascript error. You will need to sanitize your output variables, you can do that for this case by using the following:

${fn:replace(${et.author.name}, '\"', '\\\"'}

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