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Servlet中的重定向和请求分派.doc

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1.重定向 在Servlet中的接口HttpServletRequest提供了sendRedirect()方法用于生成302相应码和Location响应头，从而通知客户端去重新访问Location响应头指定的URL，其定义如下： publicvoidsendRedirect(Stringlocation)throwsIOException; 对于sendRedirect()方法不仅可以重定向到当前应用程序中的其他资源，也可重定向到一个容器中的其他应用程序中的资源。 eg: //Servlet1.java packagecom.lkh.redrect; importjava.io.IOException; importjavax.servlet.RequestDispatcher; importjavax.servlet.ServletException; importjavax.servlet.http.HttpServlet; importjavax.servlet.http.HttpServletRequest; importjavax.servlet.http.HttpServletResponse; publicclassServlet1extendsHttpServlet{ @Override protectedvoiddoGet(HttpServletRequestrequest, HttpServletResponseresponse)throwsServletException,IOException{ //TODOAuto-generatedmethodstub this.doPost(request,response); } @Override protectedvoiddoPost(HttpServletRequestrequest, HttpServletResponseresponse)throwsServletException,IOException{ //TODOAuto-generatedmethodstub response.sendRedirect("Servlet2");//重定向到指定路径的资源 //RequestDispatcherdis=request.getRequestDispatcher("Servlet2"); //dis.forward(request,response); } } //Servlet2.java packagecom.lkh.redrect; importjava.io.IOException; importjava.io.PrintWriter; importjavax.servlet.ServletException; importjavax.servlet.http.HttpServlet; importjavax.servlet.http.HttpServletRequest; importjavax.servlet.http.HttpServletResponse; publicclassServlet2extendsHttpServlet{ @Override protectedvoiddoGet(HttpServletRequestrequest, HttpServletResponseresponse)throwsServletException,IOException{ //TODOAuto-generatedmethodstub this.doPost(request,response); } @Override protectedvoiddoPost(HttpServletRequestrequest, HttpServletResponseresponse)throwsServletException,IOException{ //TODOAuto-generatedmethodstub response.setContentType("text/html;charset=utf-8"); PrintWriterout=response.getWriter(); out.println("<html>"); out.println("<head><title>servlet2</title></head>"); out.println("<body>"); out.println("从Servlet2中获取请求参数name的值："); out.println(request.getParameter("name")); out.println("</body>"); out.println("</