jsf getRequestParameterMap() & getRequestMap()

最新推荐文章于 2021-09-10 17:15:40 发布

原创最新推荐文章于 2021-09-10 17:15:40 发布 · 206 阅读

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#JSF #JSP

本文解析了JSF中FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap()与FacesContext.getCurrentInstance().getExternalContext().getRequestMap()的区别。前者包含客户端设置的所有请求参数，服务器可以获取但不能更改；后者包含服务器设置或控制的所有请求属性，客户端无法控制。

太晕了，一直以为这两个是同样的方法呢，今天在前台添加了参数<param，用getRequestMap()死活得不到，才想到查查这两个方法的区别：与JSP的getParameter/getAttribute相同

FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap(); FacesContext.getCurrentInstance().getExternalContext().getRequestMap();

The first contains all request parameters which are set by the client. The server can get them but cannot change it.
The second contains all request attributes which are set/controlled by the server. The client has no control over it.