servlet实现文件上传功能

import java.io.File;
import java.io.IOException;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.MultipartConfig;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.Part;

@WebServlet("/upload")
@MultipartConfig
public class FileUploadServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        // 获取上传的文件
        List<Part> fileParts = (List<Part>) request.getParts();

        // 保存文件到指定路径
        for (Part filePart : fileParts) {
            String fileName = filePart.getSubmittedFileName();
            filePart.write("/path/to/save/" + fileName);
        }

        response.getWriter().println("文件上传成功！");
    }
}