Servlet - 将响应导出到 Excel 文件

Question

我无法将响应从 servlet 导出到 excel 文件。请看下面的代码：

测试.java：

 @Override
public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
response.setContentType("text/html");
out = response.getWriter();
out.print("<form name=\"test\" method=\"post\" action=\"Export\">");
out.print("<table border=\"1\" cellpadding=\"3\" bordercolor='black'");
out.print("<tr>");
out.print("<td>1</td>");
out.print("<td>hello how are you?</td>");
out.print("</tr>");
out.print("</table>");
out.print("<td><input type=\"submit\" name =\"submit1\" value=\"Export To Excel\"></td>");
out.print("</form>");

单击提交按钮时会生成一个不包含任何值的 Excel 工作表。查看Export.java单击提交按钮时调用的 。

导出.java

public class Export extends HttpServlet {

@Override
public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
    String submit1 = request.getParameter("submit1");
   if (submit1 != null) {
        response.setContentType("application/vnd.ms-excel");
        response.setHeader("Content-Disposition", "attachment; filename=users.xls");
    }
}
}

此外，据观察，如果我将以下代码写入Test.java.

response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-Disposition", "attachment; filename=users.xls");

单击提交按钮时，是否有任何方法可以将输出转发Export.java到Test.java。

Answer 1

终于，我找到了解决办法！我把所有的out.print()东西都存储到一个StringBuffer. 然后使用getServletContext().setAttribute("test", Buffer);我将整个内容转发到另一个 servlet 并从另一个 servlet 我使用StringBuffer data = (StringBuffer) getServletContext().getAttribute("test");.

最后，

response.setContentType("application/vnd.ms-excel");
response.setHeader("Content-Disposition", "attachment; filename=sample.xls");
response.getWriter().write(data.toString());`

完成了工作。