[试题]Request之URL地址编码

[试题]Request之URL地址编码 Request之URL地址编码 Request之URL地址编码 2010-10-15 09:33 当传的数据是通过Get方法传的时候，url的地址如果是中文就会出现乱码现象 这时就需要用URLEncoder.encode(fname, ecode)) 下面举个电影下载的例子，FileList列出下载的电影名称，当点击电影名称时 将名称通过Get方法传给RequestDemo2 然后实现下载。 首先在的webroot下面建立一个download文件夹，里面存放电影文件。 然后建立一个servlet显示所有的电影: public class FileList extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setCharacterEncoding("gb2312"); response.setContentType("text/html;charset=gb2312"); request.setCharacterEncoding("gb2312"); System.out.println("aaa"); String realpath=this.getServletContext().getRealPath("/download"); System.out.println(realpath); System.out.println("bbb"); File file=new File(realpath); File []files=file.listFiles(); List list=Arrays.asList(files); Iterator it=list.iterator(); while(it.hasNext()){ File f=it.next(); response.getWriter().write(""+f.getName()+"
\r\n"); System.out.println("ccc"); } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); } } //实现电影文件的下载servlet public class ServletDemo1 extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setCharacterEncoding("gb2312"); response.setContentType("text/html;charset=gb2312"); request.setCharacterEncoding("gb2312"); ServletContext context=this.getServletContext(); String name=request.getParameter("filename"); String fname=new String(name.getBytes("iso8859-1"),"gb2312"); System.out.println("filename="+fname); OutputStream out=response.getOutputStream(); response.setHeader("Content-Disposition", "attachment; filename="+URLEncoder.encode(fname, "UTF-8")); //1，得到与资源相关的流对象 InputStream in=this.getServletContext().getResourceAsStream("/download/"+fname); //2.通过流对象下载资源 byte [] b=new byte[1024]; int len=0; //3.把读到的数据写给客户 while((len=in.read(b))>0){ out.write(b, 0, len); System.out.println("hehehe"); } //4,关闭输出流对象 out.close(); //5,

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} public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request,response); } }