java 实现文件上传的功能，用代码举例至少3个案例

最新推荐文章于 2024-04-27 23:13:56 发布

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最新推荐文章于 2024-04-27 23:13:56 发布

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分类专栏： java面试经验收集文章标签： java hive 开发语言

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Sure, here are three examples of how you can implement file upload functionality in Java using different approaches:

1.Using Servlet API:

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.StandardCopyOption;
import javax.servlet.ServletException;
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")
public class FileUploadServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String uploadDir = "path/to/upload/directory";
        File directory = new File(uploadDir);
        if (!directory.exists()) {
            directory.mkdirs();