57 lines
2.0 KiB
Java
57 lines
2.0 KiB
Java
package com.demo;
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import java.io.*;
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import javax.servlet.*;
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import javax.servlet.http.*;
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import javax.servlet.annotation.*;
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@WebServlet(name = "FileUploadServlet", urlPatterns = {"/fileUpload.do"})
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@MultipartConfig(location = "D:\\", fileSizeThreshold = 1024)
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public class FileUploadServlet extends HttpServlet {
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public void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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// 设置请求和响应的字符编码为UTF-8
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request.setCharacterEncoding("UTF-8");
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response.setCharacterEncoding("UTF-8");
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response.setContentType("text/html;charset=UTF-8");
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// 返回Web应用程序文档根目录
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String path = this.getServletContext().getRealPath("/");
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String mnumber = request.getParameter("mnumber");
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Part p = request.getPart("fileName");
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PrintWriter out = response.getWriter();
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out.println("<html><body>");
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out.println("<font color = '#0000ff'>");
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if (p.getSize() > 1024 * 1024) { // 上传的文件不能超过1MB大小
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p.delete();
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out.println("文件太大，不能上传！");
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} else {
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path = path + "\\student\\" + mnumber;
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File f = new File(path);
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if (!f.exists()) { // 若目录不存在，则创建目录
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f.mkdirs();
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}
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// 得到文件名
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String h = p.getHeader("content-disposition");
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String fname = getFileName(h);
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p.write(path + "\\" + fname);
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out.println("文件上传成功！");
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}
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out.println("</body></html>");
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}
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private String getFileName(String contentDisposition) {
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String[] parts = contentDisposition.split(";");
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for (String part : parts) {
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if (part.trim().startsWith("filename")) {
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return part.substring(part.indexOf('=') + 1).trim().replace("\"", "");
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}
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}
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return null;
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}
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} |