Java实现从FTP获取文件下载到本地，并读取文件中的内容的成功案例

package com.aof.web.servlet;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;

import javax.jws.WebService;

import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;



@WebService(endpointInterface="com.aof.web.servlet.QualityComplainServices")
public class QualityComplainServicesImpl implements QualityComplainServices {

	//ftp对象
    private FTPClient ftp;
    //需要连接到的ftp端的ip
    private String ip = "10.46.249.7";
    //连接端口，默认21
    private int port = 21;
    //要连接到的ftp端的名字
    private String name = "DKEDI";
    //要连接到的ftp端的对应得密码
    private String pwd = "P@ssw0rd";
    
    
  //调用此方法，输入对应得ip，端口，要连接到的ftp端的名字，要连接到的ftp端的对应得密码。连接到ftp对象，并验证登录进入fto
    public boolean ftp1() {
        ftp = new FTPClient();
        try {
//          ftp.connect(ip, port);
        	if(!ftp.isConnected()){
        		ftp.connect(ip, port);
    		}
            System.out.println(ftp.login(name, pwd));
//          ftp.setCharset(Charset.forName("UTF-8"));
            ftp.setControlEncoding("UTF-8");
            return true;
        } catch (IOException e) {
            e.printStackTrace();
            return true;
        }
        
    }
    
    public void disconnect() throws Exception {
		if (ftp.isConnected()) {
			ftp.disconnect();
		}
	}
    
 // 下载文件到本地
 	public boolean download(FTPFile file) throws Exception {
 		boolean result = true;
 		// 本地文件路径
 		File f = new File("E:\\crmFiles\\");
 		if (!f.exists()) {
 			f.getParentFile().mkdirs();
 		}
 		long lRemoteSize = file.getSize();
 		try {// 下载过的不在下载了
 			OutputStream out = new FileOutputStream(f);
 			if (f.length() >= lRemoteSize) {
 				System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~本地已经存在,下载中止");
 				out.flush();
 				out.close();
 			}
 			boolean iss = ftp.retrieveFile(file.getName(), out);
 			System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~下载成功\r\n");
 			out.close();
 		} catch (Exception ex) {
 			ex.printStackTrace();
 			System.out.println("~~~~~~~~~~~~~~~~~~~~~~~~下载失败\r\n");
 			return false;
 		}
 		return result;
 	}
 	
 	private InputStreamReader read;
	private BufferedReader reader;
	
 	private String preRead(String filepath) throws Exception {
		File file = new File(filepath);
		String ordertype = null;
		if (file.isFile() && file.exists()) {
			try {
				read = new InputStreamReader(new FileInputStream(file), "GBK");
				reader = new BufferedReader(read);
				StringBuffer FileContent = new StringBuffer();
				String temp = null;
				while ((temp = reader.readLine()) != null) {
					FileContent.append(temp);
				}
				System.out.println("订单内容为------------------>>>>> "+FileContent+" <<<<<------------------");
			} catch (FileNotFoundException e) {
				System.out.println("！！！！！！！！！！！！！！！！！没有找到合适的订单信息！！！！！！！！！！！！！！！");
				e.printStackTrace();
			} finally {
				reader.close();
				read.close();
//				file.delete();
			}
		}
		return ordertype;
	}
    
    public void gmRead(String remote) throws Exception {
    	boolean downloadResult = false;
		try {
			ftp.changeWorkingDirectory(remote);
			System.out.println("远程路径为*************************"+remote);
			FTPFile[] files = ftp.listFiles(remote); // 通过路径得到文件
			System.out.println("文件数量为*************************"+files.length);
			for (int i = 0; i < files.length; i++) {
				FTPFile file = files[i];
				if (file.isFile()) {
					downloadResult = this.download(file);// 下载文件 到本地读取路径
					if (downloadResult) {
						String ordertype = this.preRead("E:\\crmFiles\\");
					}
					/*//读取文件内容，将内容存数据库
					InputStreamReader isr = new InputStreamReader(new FileInputStream(file), "utf-8");
					BufferedReader br = new BufferedReader(isr);
					String lineTxt = null;
					while ((lineTxt = br.readLine()) != null) {
						lineTxt+=lineTxt;
					}
					System.out.println(lineTxt);
					br.close();*/
				}else{
					System.out.println("************* 文件不存在 ************");
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
    
	@Override
	public String threeDAndEightDReports(String orderNum, String FTPUrl, String FileType) {
		//抱怨单号、FTP地址、3D/8D文件类型
		System.out.println("1-------------"+orderNum);
		System.out.println("2-------------"+FTPUrl);
		System.out.println("3-------------"+FileType);
		if(null != orderNum && null != FTPUrl && null != FileType){
			//连接FTP
			boolean flag = this.ftp1();
			if(flag){
				try {
					//获取文件、解析文件内容，进库操作
					this.gmRead(FTPUrl);
					// 关闭连接
					this.disconnect();
				} catch (Exception e) {
					e.printStackTrace();
				}
			}else{
				System.out.println("！！！！！！！！！！！！！！！！！FTP连接失败！！！！！！！！！！！！！！！！！");
			}
			
			return "success";
		}else{
			return "fail";
		}
	}
	
	
	public static void main(String[] args) {
		QualityComplainServicesImpl q = new QualityComplainServicesImpl();
		q.threeDAndEightDReports("001","/CRMINTERFACE","3D");
	}

	
	
	
	
}

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2020/09/16 22:51 戴卡五楼