【FTP】使用org.apache.commons.net.ftp.FTPClient 实现FTP的上传下载

在此之前，在项目中加上FTP的架包

第一步：配置FTP服务器的相关配置

FtpConfig.java  实体类（配置类）

 1 package com.sxd.ftp;
 2
 3 public class FtpConfig {
 4      //主机ip
 5     private String FtpHost = "192.168.18.252";
 6     //端口号
 7     private int FtpPort = 21;
 8     //ftp用户名
 9     private String FtpUser = "ftp";
10     //ftp密码
11     private String FtpPassword = "agenbiology";
12     //ftp中的目录  这里先指定的根目录
13     private String FtpPath = "/";
14
15
16
17     public String getFtpHost() {
18         return FtpHost;
19     }
20     public void setFtpHost(String ftpHost) {
21         FtpHost = ftpHost;
22     }
23     public int getFtpPort() {
24         return FtpPort;
25     }
26     public void setFtpPort(int ftpPort) {
27         FtpPort = ftpPort;
28     }
29     public String getFtpUser() {
30         return FtpUser;
31     }
32     public void setFtpUser(String ftpUser) {
33         FtpUser = ftpUser;
34     }
35     public String getFtpPassword() {
36         return FtpPassword;
37     }
38     public void setFtpPassword(String ftpPassword) {
39         FtpPassword = ftpPassword;
40     }
41     public String getFtpPath() {
42         return FtpPath;
43     }
44     public void setFtpPath(String ftpPath) {
45         FtpPath = ftpPath;
46     }
47
48
49
50 }

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第二步：

FtpUtils.java 实现简单的上传下载

  1 package com.sxd.ftp;
  2
  3 import java.io.File;
  4 import java.io.FileInputStream;
  5 import java.io.FileOutputStream;
  6 import java.io.IOException;
  7 import java.io.InputStream;
  8 import java.io.OutputStream;
  9
 10 import org.apache.commons.net.ftp.FTPClient;
 11 import org.junit.Test;
 12
 13
 14
 15 public class FtpUtils {
 16
 17     /**
 18      * 获取FTP连接
 19      * @return
 20      */
 21     public  FTPClient getFTPClient() {
 22         FtpConfig config = new FtpConfig();
 23         FTPClient ftpClient = new FTPClient();
 24         boolean result = true;
 25         try {
 26             //连接FTP服务器
 27             ftpClient.connect(config.getFtpHost(), config.getFtpPort());
 28             //如果连接
 29             if (ftpClient.isConnected()) {
 30                 //提供用户名/密码登录FTP服务器
 31                 boolean flag = ftpClient.login(config.getFtpUser(), config.getFtpPassword());
 32                 //如果登录成功
 33                 if (flag) {
 34                     //设置编码类型为UTF-8
 35                     ftpClient.setControlEncoding("UTF-8");
 36                     //设置文件类型为二进制文件类型
 37                     ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
 38                 } else {
 39                     result = false;
 40                 }
 41             } else {
 42                 result = false;
 43             }
 44             //成功连接并 登陆成功  返回连接
 45             if (result) {
 46                 return ftpClient;
 47             } else {
 48                 return null;
 49             }
 50         } catch (Exception e) {
 51             e.printStackTrace();
 52             return null;
 53         }
 54     }
 55
 56
 57
 58     /**
 59      *
 60      * @param localPath本地路径
 61      * @param fileName文件名
 62      * @param newPath上传至FTP的新位置
 63      * @return
 64      */
 65     public  boolean testUpload(String localPath,String fileName,String newPath) {
 66         boolean result = true;
 67         FileInputStream in = null;
 68         FTPClient ftpClient = getFTPClient();
 69         if (null == ftpClient) {
 70             System.out.println("FTP服务器未连接成功!!!");
 71             return false;
 72         }
 73         try {
 74             //当前上传的文件
 75             File file = new File(localPath+fileName);
 76             in = new FileInputStream(file);
 77             //上传至FTP服务器的新位置
 78             ftpClient.changeWorkingDirectory(newPath);
 79             //上传
 80             ftpClient.storeFile(fileName, in);
 81             System.out.println(ftpClient.printWorkingDirectory());
 82             return result;
 83         } catch (IOException e) {
 84             e.printStackTrace();
 85             return false;
 86         } finally {
 87             close(in, null, ftpClient);
 88         }
 89     }
 90
 91     /**
 92      * FTP下载
 93      * @param fileName  文件名
 94      * @param localPath
 95      * @param remotePath
 96      * @return
 97      */
 98     public  boolean testDownload(String localPath,String fileName, String remotePath) {
 99         boolean result = true;
100         FileOutputStream out = null;
101         FTPClient ftpClient = getFTPClient();
102         if (null == ftpClient) {
103             System.out.println("FTP服务器未连接成功!!!");
104             return false;
105         }
106         try {
107             //要写到本地的位置
108             File file = new File(localPath + fileName);
109             out = new FileOutputStream(file);
110             //文件存储在FTP的位置
111             ftpClient.changeWorkingDirectory(remotePath);
112             //下载文件
113             ftpClient.retrieveFile(fileName, out);
114             System.out.println(ftpClient.printWorkingDirectory());
115             return result;
116         } catch (IOException e) {
117             e.printStackTrace();
118             return false;
119         } finally {
120             close(null, out, ftpClient);
121         }
122     }
123
124
125     /**
126      * 关闭 输入流或输出流
127      * @param in
128      * @param out
129      * @param ftpClient
130      */
131     public static void close(InputStream in, OutputStream out,FTPClient ftpClient) {
132         if (null != in) {
133             try {
134                 in.close();
135             } catch (IOException e) {
136                 e.printStackTrace();
137                 System.out.println("输入流关闭失败");
138             }
139         }
140         if (null != out) {
141             try {
142                 out.close();
143             } catch (IOException e) {
144                 e.printStackTrace();
145                 System.out.println("输出流关闭失败");
146             }
147         }
148         if (null != ftpClient) {
149             try {
150                 ftpClient.logout();
151                 ftpClient.disconnect();
152             } catch (IOException e) {
153                 e.printStackTrace();
154                 System.out.println("Ftp服务关闭失败!");
155             }
156         }
157     }
158
159
160     @Test
161     public void test(){
162         FtpConfig config = new FtpConfig();
163         //上传文件
164 //        testUpload("D:/","new4.txt" , config.getFtpPath());
165         //下载
166         testDownload("D:/develop/", "new4.txt", config.getFtpPath());
167
168
169
170     }
171 }

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