JavaServer Face(JSF)内置了HttpServletResponse，所以不可以直接在JSF的Bean内使用sendRedirect之类的重定向函数。花了N多的时间查资料，发现误导性的文章比较多，为了有同样需要的人少浪费点时间在这身上，这里把测试通过的方法记录一下：
●导入Servlet包import javax.servlet.http.*;
●加入下面的取得HttpServletResponse的函数：
protected HttpServletResponse getResponse() …{ FacesContext facesContext = FacesContext.getCurrentInstance(); HttpServletResponse response = (HttpServletResponse) facesContext .getExternalContext().getResponse(); return response; } ●在需要重定向的地方加入下面代码 response.sendRedirect(“sample.jsp”); facesContext.responseComplete(); // 这一句很重要 return null; 注：最后的return看自己的需要返回
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