java/struts/Servlet文件下载与ftp文件上传下载

String s1&＃61;transUrl; // transUrl是前台接受的参数,get接受的参数tomcat一律使用iso-8859-1编码

transUrl&＃61;new String(transUrl.getBytes("ISO-8859-1"),"utf-8");//程序中要使用的文件名&＃xff0c;必须转换为gbk编码
s1&＃61;s1.substring(6);
s1&＃61;s1.substring(s1.indexOf("/"));
String filename&＃61;s1.substring(s1.lastIndexOf("/")&＃43;1);
String filepath&＃61;s1.substring(0,s1.lastIndexOf("/"));

response.setCharacterEncoding("gbk");
response.setContentType("application/octet-stream");
response.addHeader("Content-Disposition", "attachment;filename&＃61;\"" &＃43; new String(filename.getBytes("gbk"),"ISO-8859-1")&＃43; "\"");//response文件头中定义的filename包含的中文必须是原始的ISO-8859-1编码。

boolean suc&＃61;false;
suc&＃61;downFileStream("10.0.2.1", 21,"myUser","myPwd",
filepath, filename, os);//downFileStream是一个下载ftp文件到文件流的方法
if(!suc){
response.reset();
response.setCharacterEncoding("gbk");
PrintWriter writer&＃61;new PrintWriter(os);
writer.write("指定的文件不存在!");
writer.close();
}else{
os.close();
};

import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPReply;public static boolean downFile(String url, // FTP服务器hostnameint port,// FTP服务器端口String username, // FTP登录账号String password, // FTP登录密码String remotePath,// FTP服务器上的相对路径String fileName,// 要下载的文件名String localPath// 下载后保存到本地的路径
) {boolean success &＃61; false;FTPClient ftp &＃61; new FTPClient();try {int reply;ftp.connect(url, port);// 如果采用默认端口&＃xff0c;可以使用ftp.connect(url)的方式直接连接FTP服务器ftp.login(username, password);// 登录reply &＃61; ftp.getReplyCode();if (!FTPReply.isPositiveCompletion(reply)) {ftp.disconnect();return success;}ftp.changeWorkingDirectory(remotePath);// 转移到FTP服务器目录FTPFile[] fs &＃61; ftp.listFiles();boolean ftpFileExist&＃61;false;for (FTPFile ff : fs) {if (ff.getName().equals(fileName)) {ftpFileExist&＃61;true;File dir &＃61; new File(localPath);if(!dir.exists()){dir.mkdirs();}File localFile &＃61; new File(localPath &＃43; File.separator &＃43; ff.getName());OutputStream is &＃61; new FileOutputStream(localFile,true);ftp.setBufferSize(1024);if(ftp.setFileType(FTP.BINARY_FILE_TYPE)){ftp.retrieveFile(ff.getName(), is);is.close();}}}ftp.logout();if(ftpFileExist){success &＃61; true;}} catch (IOException e) {e.printStackTrace();} finally {if (ftp.isConnected()) {try {ftp.disconnect();} catch (IOException ioe) {}}}return success;
}

public static boolean downFileStream(String url, // FTP服务器hostnameint port,// FTP服务器端口String username, // FTP登录账号String password, // FTP登录密码String remotePath,// FTP服务器上的相对路径String fileName,// 要下载的文件名
OutputStream os
) {boolean success &＃61; false;FTPClient ftp &＃61; new FTPClient();try {int reply;ftp.connect(url, port);// 如果采用默认端口&＃xff0c;可以使用ftp.connect(url)的方式直接连接FTP服务器ftp.login(username, password);// 登录reply &＃61; ftp.getReplyCode();if (!FTPReply.isPositiveCompletion(reply)) {ftp.disconnect();return false;}ftp.changeWorkingDirectory(remotePath);// 转移到FTP服务器目录FTPFile[] fs &＃61; ftp.listFiles();boolean ftpFileExist&＃61;false;for (FTPFile ff : fs) {String ffName&＃61;new String(ff.getName().getBytes("ISO-8859-1"),"gbk");if (ffName.equals(fileName)) {ftpFileExist&＃61;true;ftp.setBufferSize(1024);if(ftp.setFileType(FTP.BINARY_FILE_TYPE)){ftp.retrieveFile(ff.getName(), os);}}}ftp.logout();if(ftpFileExist){success &＃61; true;}} catch (IOException e) {e.printStackTrace();} finally {if (ftp.isConnected()) {try {ftp.disconnect();} catch (IOException ioe) {}}}return success;
}

public static boolean uploadFile(String url,// FTP服务器hostnameint port,// FTP服务器端口String username, // FTP登录账号String password, // FTP登录密码String path, // FTP服务器保存目录String filename, // 上传到FTP服务器上的文件名InputStream input // 输入流
) {boolean success &＃61; false;FTPClient ftp &＃61; new FTPClient();try {int reply;ftp.connect(url, port);// 连接FTP服务器// 如果采用默认端口&＃xff0c;可以使用ftp.connect(url)的方式直接连接FTP服务器ftp.login(username, password);// 登录reply &＃61; ftp.getReplyCode();if (!FTPReply.isPositiveCompletion(reply)) {ftp.disconnect();return success;}ftp.changeWorkingDirectory(path);ftp.storeFile(filename, input);input.close();ftp.logout();success &＃61; true;} catch (IOException e) {e.printStackTrace();} finally {if (ftp.isConnected()) {try {ftp.disconnect();} catch (IOException ioe) {}}}return success;
}

public static void main(String[] args) throws Exception{FtpUtil f&＃61; new FtpUtil();File file&＃61;new File("D:/测试.xml");InputStream isInputStream&＃61;new FileInputStream(file);String filename&＃61;new String("中文.xml".getBytes("gbk"),"ISO-8859-1");f.uploadFile("10.7.0.15", 21, "dd", "dd", "/tazi",filename, isInputStream);}