javaserver pages 碎片(1)

1.

<c:if test="${param['locale'] != null}">
  <fmt:setLocale value="${param['locale']}" scope="session" />
</c:if>

2.
<fmt:setBundle/>设置全局资源绑定
<fmt:Bundle>
    <fmt:message key=""/>
</fmt:Bundle>

3.
The JSP expression language defines a set of implicit objects:

* pageContext: The context for the JSP page. Provides access to various objects including:
  o servletContext: The context for the JSP page's servlet and any web components contained in the same application. See Accessing the Web Context.
  o session: The session object for the client. See Maintaining Client State.
  o request: The request triggering the execution of the JSP page. See Getting Information from Requests.
  o response: The response returned by the JSP page. See Constructing Responses.

In addition, several implicit objects are available that allow easy access to the following objects:

* param: Maps a request parameter name to a single value
* paramValues: Maps a request parameter name to an array of values
* header: Maps a request header name to a single value
* headerValues: Maps a request header name to an array of values
* cookie: Maps a cookie name to a single cookie
* initParam: Maps a context initialization parameter name to a single value

Finally, there are objects that allow access to the various scoped variables described in Using Scope Objects.

* pageScope: Maps page-scoped variable names to their values
* requestScope: Maps request-scoped variable names to their values
* sessionScope: Maps session-scoped variable names to their values
* applicationScope: Maps application-scoped variable names to their values

4.
# Core: http://java.sun.com/jsp/jstl/core
# XML: http://java.sun.com/jsp/jstl/xml
# Internationalization: http://java.sun.com/jsp/jstl/fmt
# SQL: http://java.sun.com/jsp/jstl/sql
# Functions: http://java.sun.com/jsp/jstl/functions