一、<s:url>
<s:url>可以直接生成一个url或url变量，它会在href的基础上加上应用context
1.
<a href="<s:url href="/spitter/register" />">Register</a>
如果应用的context是“spittr”，则会转换为
<a href="/spittr/spitter/register">Register</a>
2.生成url变量
<s:url href="/spitter/register" var="registerUrl" />
<a href="${registerUrl}">Register</a>
3.可以指定作用域application、session、request，默认是page
<s:url href="/spitter/register" var="registerUrl" scope="request" />
4.<s:url>可以做JSTL的<c:url>不能做的,给url加参数
<s:url href="/spittles" var="spittlesUrl">
<s:param name="max" value="60" />
<s:param name="count" value="20" />
</s:url>
5.用占位符实现 path parameter的url
<s:url href="/spitter/{username}" var="spitterUrl">
<s:param name="username" value="jbauer" />
</s:url>
参数名字若匹配不到占位符，则会变以query parameter
6.
<s:url value="/spittles" htmlEscape="true">
<s:param name="max" value="60" />
<s:param name="count" value="20" />
</s:url>
This results in the URL being rendered like this:
/spitter/spittles?max=60&count=20
7.若要在javascript中使用所定义变量
<s:url value="/spittles" var="spittlesJSUrl" javaScriptEscape="true">
<s:param name="max" value="60" />
<s:param name="count" value="20" />
</s:url>
8.
<script>
var spittlesUrl = "${spittlesJSUrl}"
</script>
This renders the following to the response:
<script>
var spittlesUrl = "\/spitter\/spittles?max=60&count=20"
</script>
二、<s:escapeBody>
1.在html中显示"<"和">"要分别转换为<和>,否则会被当成html标签的结束和开始标签
<s:escapeBody htmlEscape="true">
<h1>Hello</h1>
</s:escapeBody>
This renders the following to the body of the response:
<h1>Hello</h1>
2.The <s:escapeBody> tag also supports JavaScript escaping with the javaScriptEscape attribute:
<s:escapeBody javaScriptEscape="true">
<h1>Hello</h1>
</s:escapeBody>