23号球衣

java IO | Class简单使用

2008-06-25

关键字: context

FacesContext fc = FacesContext.getCurrentInstance();

ExternalContext ec = fc.getExternalContext();

HttpServletRequest servletRequest = (HttpServletRequest)ec.getRequest();

HttpServletResponse servletResponse = (HttpServletResponse)ec.getResponse();

取得 parameter的办法

1)

String key = httpRequest.getParameter( "key" );

String value = httpRequest.getParameter( "value" );

2)

Map request = ex.getRequestParameterMap();

String key = request.get(“key”);

ExternalContext 一些方法

getRequestContextPath(); “/cmp”

getRequestServletPath(); “/ajax”

getRequestPathInfo(); “/invoke/iStoreBean.changeBasic”

ServletContext servletContext = ec.getContext();

servletContext.getRealPath(“/”); file system path

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