Java中如何实现FTP文件上传

package com.ztesoft.ibss.ct.bo.recruit;

import com.powerise.ibss.util.DBUtil;
import com.ztesoft.ibss.common.util.SqlMapExe;
import com.ztesoft.ibss.inf.framework.dao.SqlExe;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.sql.Connection;
import java.util.List;

/**
 * @Author zgp
 * @Since 2021 -03 -29 15 :16
 * @Description 招聘活动，pdf简历文件上传到服务器
 */
public class RecruitActivityUpPdf extends HttpServlet {

    public RecruitActivityUpPdf() {
        super();
    }

    //Ftp主机名
    private String ftpHost = "134.224.165.193";
    //Ftp用户名
    private String ftpUserName = "wgzx";
    //Ftp密码
    private String ftpPassword = "5Z9k%ppNrsuTFlh3";
    //Ftp的端口号，默认21
    private int ftpPort = 21;
    //Ftp服务器的文件路径
    private String ftpPath = "/home/weblogic/Oracle/Middleware/user_projects/domains/APPdomain/upload/CtWeb/resume_pdf/";
    //上传文件名称
    //private String fileName = "Teacher.pdf";

    /*//Ftp主机名
    private String ftpHost = "134.225.67.7";
    //Ftp用户名
    private String ftpUserName = "yzf";
    //Ftp密码
    private String ftpPassword = "CHN_yzf486%#!";
    //Ftp的端口号，默认21
    private int ftpPort = 21;
    //Ftp服务器的文件路径
    private String ftpPath = "/home/weblogic/ftp/yzf/";
    //上传文件名称
    //private String fileName = "Teacher.pdf";*/

    private File storeFile;
    private SqlMapExe sqlexe;
    Connection conn=null;
    //更新RecruitActivity表
    private static final String UPDATE_RECRUIT_ACTIVITY="UPDATE RECRUITACTIVITY "
            + "SET FILEINPUT=? WHERE LOGINPHONE=?";
    private String  userNumber;

    // 上传文件存储目录
    private static final String UPLOAD_DIRECTORY = "upload";

    // 上传配置
    private static final int MEMORY_THRESHOLD   = 1024 * 1024 * 3;  // 3MB
    private static final int MAX_FILE_SIZE      = 1024 * 1024 * 40; // 40MB
    private static final int MAX_REQUEST_SIZE   = 1024 * 1024 * 50; // 50MB

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        //获取用户的号码，根据用户的号码更新表信息
        userNumber = req.getParameter("userNumber");
        System.out.println("获取用户的userNumber为："+userNumber);

        //检测是否为多媒体上传
        if (!ServletFileUpload.isMultipartContent(req)) {
            // 如果不是则停止
            PrintWriter writer = resp.getWriter();
            writer.println("Error: 表单必须包含 enctype=multipart/form-data");
            writer.flush();
            return;
        }

        // 配置上传参数
        DiskFileItemFactory factory = new DiskFileItemFactory();
        // 设置内存临界值 - 超过后将产生临时文件并存储于临时目录中
        factory.setSizeThreshold(MEMORY_THRESHOLD);
        // 设置临时存储目录
        factory.setRepository(new File(System.getProperty("java.io.tmpdir")));
        ServletFileUpload upload = new ServletFileUpload(factory);

        // 设置最大文件上传值
        upload.setSizeMax(MAX_FILE_SIZE);
        // 设置最大请求值 (包含文件和表单数据)
        upload.setSizeMax(MAX_REQUEST_SIZE);
        // 中文处理
        upload.setHeaderEncoding("UTF-8");

        // 构造临时路径来存储上传的文件
        // 这个路径相对当前应用的目录
        String uploadPath = getServletContext().getRealPath("/") + File.separator + UPLOAD_DIRECTORY;
        //String uploadPath = getServletContext().getRealPath("/")  + UPLOAD_DIRECTORY;
        //String uploadPath = "/home/weblogic/Oracle/Middleware/user_projects/domains/APPdomain/upload/CtWeb/resume_pdf/";
        //String uploadPath = "/home/weblogic/ftp/yzf";

        // 如果目录不存在则创建
        File uploadDir = new File(uploadPath);
        if (!uploadDir.exists()) {
            uploadDir.mkdir();
        }

        try {
            // 解析请求的内容提取文件数据
            @SuppressWarnings("unchecked")
            List<FileItem> formItems = upload.parseRequest(req);

            if (formItems != null && formItems.size() > 0) {
                // 迭代表单数据
                for (FileItem item : formItems) {
                    // 处理不在表单中的字段
                    if (!item.isFormField()) {
                        String fileName = new File(item.getName()).getName();
                        System.out.println("获取用户上传的文件名为："+fileName);
                        /*upLoadFilePdf(uploadPath,fileName);*/
                        //String filePath=uploadPath+File.separator+fileName;
                        String filePath = "/home/weblogic/Oracle/Middleware/user_projects/domains/newwap/upload/wap/upload/" + fileName;
                        //String filePath = uploadPath + fileName;
                        storeFile = new File(filePath);
                        // 在控制台输出文件的上传路径
                        System.out.println(filePath);
                        // 保存文件到硬盘
                        item.write(storeFile);
                        req.setAttribute("message", "文件上传成功!");
                        //System.out.println("文件上传成功!");
                        //upLoadFilePdf(uploadPath,fileName);
                        upLoadFilePdf(fileName);
                        //删除本地临时文件
                        //storeFile.delete();
                    }
                }
            }
        } catch (Exception ex) {
            req.setAttribute("message", "错误信息: " + ex.getMessage());
        }
    }

    /**
     * location:134.224.165.193
     * username:wgzx
     * password:5Z9k%ppNrsuTFlh3
     * path:/home/weblogic/Oracle/Middleware/user_projects/domains/APPdomain/upload/CtWeb/resume_pdf/
     * @param
     * @param file_name
     */
    //public void upLoadFilePdf(String file_path, String file_name) {
    public void upLoadFilePdf(String file_name) {
        try {

            SqlExe sqlExe=new SqlExe();
            boolean b = sqlExe.execUpdateForList(UPDATE_RECRUIT_ACTIVITY, new String[]{file_name, userNumber});
            System.out.println("retBoolean:"+b);

            String tmpPath = System.getProperty("java.io.tmpdir");
            //FileInputStream in=new FileInputStream(new File(file_path + file_name));
            FileInputStream in=new FileInputStream(storeFile);
            FtpUtilActivity.uploadFile(ftpHost, ftpUserName,  ftpPassword, ftpPort, ftpPath, file_name, in);
            //简历上传成功，同时更新简历表，更新文件上传字段
            /*SqlExe sqlExe=new SqlExe();
            boolean b = sqlExe.execUpdateForList(UPDATE_RECRUIT_ACTIVITY, new String[]{file_name, userNumber});
            System.out.println("retBoolean:"+b);*/
        }catch (Exception e){
            e.printStackTrace();
            System.out.println("Exception:"+e.getMessage());
        }
    }

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        this.doPost(req,resp);
    }
}