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1.RequestDispatcher.forward() 
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Àý:ÔÚservletÖнøÐÐÖØ¶¨Ïò 
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public void doPost(HttpServletRequest request,HttpServletResponse response)  
throws ServletException,IOException   ...{  
    response.setContentType("text/html; charset=gb2312");  
    ServletContext sc = getServletContext();  
    RequestDispatcher rd = null;  
    rd = sc.getRequestDispatcher("/index.jsp"); //¶¨ÏòµÄÒ³Ãæ  
    rd.forward(request, response);  
}
2.response.sendRedirect() 
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public void doPost(HttpServletRequest request,HttpServletResponse response)  
throws ServletException,IOException   ...{  
    response.setContentType("text/html; charset=gb2312");  
    response.sendRedirect("/index.jsp");  
}
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