下面展示通过http 方式上传文件到服务器：
/**
- 文件上传接口
- @param request【module】【filename】
- @param response
-
FTP 工具类： package com.ejauto.core.ftp;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import com.ejauto.core.utils.Constants;
Logger log = Logger.getLogger(FtpUtils.class);
private FTPClient ftpClient = null;
private String server;
private int port;
private String userName;
private String userPassword;
private FtpUtils(String server,int port,String userName,String userPassword) {
this.server = server;
this.port = port;
this.userName = userName;
this.userPassword = userPassword;
}
/**
* 连接服务器
* @return 连接成功与否 true:成功， false:失败
*/
public boolean open() {
if (ftpClient != null && ftpClient.isConnected()) {
return true;
}
try {
ftpClient = new FTPClient();
// 连接
ftpClient.connect(this.server, this.port);
ftpClient.login(this.userName, this.userPassword);
setFtpClient(ftpClient);
// 检测连接是否成功
int reply = ftpClient.getReplyCode();
if (!FTPReply.isPositiveCompletion(reply)) {
this.close();
System.err.println("FTP server refused connection.");
//System.exit(1);
}
log.info("open FTP success:" + this.server + ";port:" + this.port + ";name:" + this.userName
+ ";pwd:" + this.userPassword);
ftpClient.setFileType(FTP.BINARY_FILE_TYPE); // 设置上传模式.binally or ascii
return true;
} catch (Exception ex) {
this.close();
ex.printStackTrace();
return false;
}
}
/**
* 切换到父目录
* @return 切换结果 true：成功， false：失败
*/
@SuppressWarnings("unused")
private boolean changeToParentDir() {
try {
return ftpClient.changeToParentDirectory();
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
/**
* 改变当前目录到指定目录
* @param dir 目的目录
* @return 切换结果 true：成功，false：失败
*/
@SuppressWarnings("unused")
private boolean cd(String dir) {
try {
return ftpClient.changeWorkingDirectory(dir);
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
/**
* 获取目录下所有的文件名称
*
* @param filePath 指定的目录
* @return 文件列表,或者null
*/
@SuppressWarnings("unused")
private FTPFile[] getFileList(String filePath) {
try {
return ftpClient.listFiles(filePath);
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
/**
* 层层切换工作目录
* @param ftpPath 目的目录
* @return 切换结果
*/
public boolean changeDir(String ftpPath) {
if (!ftpClient.isConnected()) {
return false;
}
try {
// 将路径中的斜杠统一
char[] chars = ftpPath.toCharArray();
StringBuffer sbStr = new StringBuffer(256);
for (int i = 0; i < chars.length; i++) {
if ('\\' == chars[i]) {
sbStr.append('/');
} else {
sbStr.append(chars[i]);
}
}
ftpPath = sbStr.toString();
if (ftpPath.indexOf('/') == -1) {
// 只有一层目录
ftpClient.changeWorkingDirectory(new String(ftpPath.getBytes(), "iso-8859-1"));
} else {
// 多层目录循环创建
String[] paths = ftpPath.split("/");
for (int i = 0; i < paths.length; i++) {
ftpClient.changeWorkingDirectory(new String(paths[i].getBytes(), "iso-8859-1"));
}
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 循环创建目录，并且创建完目录后，设置工作目录为当前创建的目录下
* @param ftpPath 需要创建的目录
* @return
*/
public boolean mkDir(String ftpPath) {
if (!ftpClient.isConnected()) {
return false;
}
try {
// 将路径中的斜杠统一
char[] chars = ftpPath.toCharArray();
StringBuffer sbStr = new StringBuffer(256);
for (int i = 0; i < chars.length; i++) {
if ('\\' == chars[i]) {
sbStr.append('/');
} else {
sbStr.append(chars[i]);
}
}
ftpPath = sbStr.toString();
if (ftpPath.indexOf('/') == -1) {
// 只有一层目录
ftpClient.makeDirectory(new String(ftpPath.getBytes(), "iso-8859-1"));
ftpClient.changeWorkingDirectory(new String(ftpPath.getBytes(), "iso-8859-1"));
} else {
// 多层目录循环创建
String[] paths = ftpPath.split("/");
for (int i = 0; i < paths.length; i++) {
ftpClient.makeDirectory(new String(paths[i].getBytes(), "iso-8859-1"));
ftpClient.changeWorkingDirectory(new String(paths[i].getBytes(), "iso-8859-1"));
}
}
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* 上传文件到FTP服务器
* @param localDirectoryAndFileName 本地文件目录和文件名
* @param ftpFileName 上传到服务器的文件名
* @param ftpDirectory FTP目录如:/path1/pathb2/,如果目录不存在会自动创建目录
* @return
*/
public boolean uploadFile(InputStream fis, String ftpFileName, String ftpDirectory) {
if (!ftpClient.isConnected()) {
return false;
}
boolean flag = false;
if (ftpClient != null) {
//File srcFile = new File(localDirectoryAndFileName);
//InputStream fis = null;
try {
//fis = new InputStream(srcFile);
// 创建目录
this.mkDir(ftpDirectory);
ftpClient.setBufferSize(100000);
ftpClient.setControlEncoding("UTF-8");
// 设置文件类型（二进制）
ftpClient.setFileType(FTPClient.BINARY_FILE_TYPE);
ftpClient.enterLocalPassiveMode();
// 上传
log.error("ftpClient.storeFile:");
flag = ftpClient.storeFile(new String(ftpFileName.getBytes("UTF-8"),"iso-8859-1"), fis);
} catch (Exception e) {
this.close();
e.printStackTrace();
log.error("Exception:"+e.getMessage());
return false;
} finally {
try {
fis.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return flag;
}
/**
* 从FTP服务器上下载文件
* @param ftpDirectoryAndFileName ftp服务器文件路径，以/dir形式开始
* @param localDirectoryAndFileName 保存到本地的目录
* @return
*/
public boolean get(String ftpDirectoryAndFileName, String localDirectoryAndFileName) {
if (!ftpClient.isConnected()) {
return false;
}
ftpClient.enterLocalPassiveMode(); // Use passive mode as default
try {
// 将路径中的斜杠统一
char[] chars = ftpDirectoryAndFileName.toCharArray();
StringBuffer sbStr = new StringBuffer(256);
for (int i = 0; i < chars.length; i++) {
if ('\\' == chars[i]) {
sbStr.append('/');
} else {
sbStr.append(chars[i]);
}
}
ftpDirectoryAndFileName = sbStr.toString();
String filePath = ftpDirectoryAndFileName.substring(0, ftpDirectoryAndFileName.lastIndexOf("/"));
String fileName = ftpDirectoryAndFileName.substring(ftpDirectoryAndFileName.lastIndexOf("/") + 1);
this.changeDir(filePath);
ftpClient.retrieveFile(new String(fileName.getBytes(), "iso-8859-1"),
new FileOutputStream(localDirectoryAndFileName)); // download
// file
//System.out.println(ftpClient.getReplyString()); // check result
//System.out.println("从ftp服务器上下载文件：" + ftpDirectoryAndFileName + "， 保存到：" + localDirectoryAndFileName);
return true;
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
/**
* 返回FTP目录下的文件列表
* @param pathName
* @return
*/
public String[] getFileNameList(String pathName) {
try {
return ftpClient.listNames(pathName);
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
/**
* 删除FTP上的文件
* @param ftpDirAndFileName 路径开头不能加/，比如应该是test/filename1
* @return
*/
public boolean deleteFile(String ftpDirAndFileName) {
if (!ftpClient.isConnected()) {
return false;
}
try {
return ftpClient.deleteFile(ftpDirAndFileName);
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
/**
* 删除FTP目录
* @param ftpDirectory
* @return
*/
public boolean deleteDirectory(String ftpDirectory) {
if (!ftpClient.isConnected()) {
return false;
}
try {
return ftpClient.removeDirectory(ftpDirectory);
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
/**
* 关闭链接
*/
public void close() {
try {
if (ftpClient != null && ftpClient.isConnected()) {
ftpClient.disconnect();
}
System.out.println("成功关闭连接，服务器ip:" + this.server + ", 端口:" + this.port);
} catch (Exception e) {
e.printStackTrace();
}
}
public FTPClient getFtpClient() {
return ftpClient;
}
public void setFtpClient(FTPClient ftpClient) {
this.ftpClient = ftpClient;
}
public void download(HttpServletResponse response,String ftpDirectoryAndFileName){
if (!ftpClient.isConnected()) {
return ;
}
ftpClient.enterLocalPassiveMode(); // Use passive mode as default
try {
// 将路径中的斜杠统一
char[] chars = ftpDirectoryAndFileName.toCharArray();
StringBuffer sbStr = new StringBuffer(256);
for (int i = 0; i < chars.length; i++) {
if ('\\' == chars[i]) {
sbStr.append('/');
} else {
sbStr.append(chars[i]);
}
}
ftpDirectoryAndFileName = sbStr.toString();
String filePath = ftpDirectoryAndFileName.substring(0, ftpDirectoryAndFileName.lastIndexOf("/"));
String fileName = ftpDirectoryAndFileName.substring(ftpDirectoryAndFileName.lastIndexOf("/") + 1);
this.changeDir(filePath);
InputStream inputStream = ftpClient.retrieveFileStream(new String(fileName.getBytes(), "iso-8859-1"));
ServletOutputStream outputStream = null;
try {
response.setHeader("content-disposition", "attachment;filename="+fileName);
//通知浏览器下载文件类型，解决部分浏览器下载APK为.htm格式
response.setContentType("application/octet-stream");
outputStream = response.getOutputStream();
byte[] buffer = new byte[8192];
int len = inputStream.read(buffer);
while (len != -1) {
outputStream.write(buffer, 0, len);
len = inputStream.read(buffer);
}
outputStream = response.getOutputStream();
ByteArrayOutputStream swapStream = new ByteArrayOutputStream();
byte[] buff = new byte[100];
int rc = 0;
while ((rc = inputStream.read(buff, 0, 100)) > 0) {
swapStream.write(buff, 0, rc);
}
byte[] in2b = swapStream.toByteArray();
outputStream.write(in2b);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if(inputStream!=null){
inputStream.close();
}
if(outputStream!=null){
outputStream.flush();
outputStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}catch(Exception e){
log.info(e.getMessage());
e.printStackTrace();
}
}public void downloadImg(HttpServletResponse response,String ftpDirectoryAndFileName){
if (!ftpClient.isConnected()) {
return ;
}
ftpClient.enterLocalPassiveMode(); // Use passive mode as default
try {
// 将路径中的斜杠统一
char[] chars = ftpDirectoryAndFileName.toCharArray();
StringBuffer sbStr = new StringBuffer(256);
for (int i = 0; i < chars.length; i++) {
if ('\\' == chars[i]) {
sbStr.append('/');
} else {
sbStr.append(chars[i]);
}
}
ftpDirectoryAndFileName = sbStr.toString();
String filePath = ftpDirectoryAndFileName.substring(0, ftpDirectoryAndFileName.lastIndexOf("/"));
String fileName = ftpDirectoryAndFileName.substring(ftpDirectoryAndFileName.lastIndexOf("/") + 1);
this.changeDir(filePath);
InputStream inputStream = ftpClient.retrieveFileStream(new String(fileName.getBytes(), "iso-8859-1"));
ServletOutputStream outputStream = null;
try {
outputStream = response.getOutputStream();
byte[] buffer = new byte[8192];
int len = inputStream.read(buffer);
while (len != -1) {
outputStream.write(buffer, 0, len);
len = inputStream.read(buffer);
}
outputStream = response.getOutputStream();
ByteArrayOutputStream swapStream = new ByteArrayOutputStream();
byte[] buff = new byte[100];
int rc = 0;
while ((rc = inputStream.read(buff, 0, 100)) > 0) {
swapStream.write(buff, 0, rc);
}
byte[] in2b = swapStream.toByteArray();
outputStream.write(in2b);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if(inputStream!=null){
inputStream.close();
}
if(outputStream!=null){
outputStream.flush();
outputStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}catch(Exception e){
log.info(e.getMessage());
e.printStackTrace();
}
}
public boolean upload(InputStream fis, String ftpDirectory){
String ftpFileName = ftpDirectory.substring(ftpDirectory.indexOf("/"));
return uploadFile(fis, ftpFileName, ftpDirectory);
}
public static FtpUtils getInstance(){
String host = Constants.FTP_HOST;
int port = Integer.valueOf(Constants.FTP_PORT).intValue();
String user = Constants.FTP_USERNAME;
String pwd = Constants.FTP_PWD;
FtpUtils f = new FtpUtils(host, port, user, pwd);
if(f.open()){
return f;
}
return null;
}
public static void main(String[] args) {
FileInputStream input = null;
FtpUtils f=FtpUtils.getInstance();
}public String getFilePath(HttpServletResponse response,String fileName) throws IOException{
if (!ftpClient.isConnected()) {
return "";
}
ftpClient.enterLocalPassiveMode(); // Use passive mode as default
ftpClient.getPassiveLocalIPAddress();
System.out.println("getPassiveLocalIPAddress:"+ftpClient.getLocalAddress());
String url="ftp://"+ftpClient.getLocalAddress()+File.separator+fileName;//拼接ftp 路径
return url;
}本文转自杨海龙的博客博客51CTO博客，原文链接http://blog.51cto.com/7218743/2043529如需转载请自行联系原作者
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