上傳文件到指定的服務器
url爲服務器的ip
username爲服務器的登錄名
password爲服務器的密碼
path爲要上傳的服務器絕對路徑 /home/xxxx/file
filename 文件名的數組
filepath 文件路徑的數組,
現在ie8,firefox的安全機制都使得現在的上傳文件或許不到絕對路徑,當然如果直接上傳到tomcat服務器的時候例外.
如果上傳的地方與tomcat沒有任何關係,就是要上傳到linux的一個指定文件夾下的話,這樣就比較麻煩了,因爲上傳需要的是絕對路徑,而現在的瀏覽器又獲取不到.
這時候就需要先把文件利用struts上傳文件到tomcat下的一個臨時目錄,再通過ServletActionContext.getRequest().getRealPath("/tmp")獲取臨時文件夾的路徑加上文件名.這就是filepath的由來。
爲防止文件名衝突所帶的影響,就採用的時間long型作爲文件名,當然數據庫存的時候要指定一下
public static String[] uploadFile(String url, String username,
String password, String path, String[] filename, String[] filepath) {
Timestamp d = new Timestamp(System.currentTimeMillis());
String[] uppath = new String[filename.length];
TelnetOutputStream os = null;
FtpClient ftpClient = new FtpClient();
try {
ftpClient.openServer(url);
ftpClient.login(username, password);
ftpClient.cd(path);
ftpClient.binary();
for (int i = 0; i < filename.length; i++) {
FileInputStream in = new FileInputStream(new File(
filepath[i]));
uppath[i] = d.getTime() + "." + getFileHouZhui(filename[i]);
try {
// 命名文件
os = ftpClient.put(uppath[i]);
byte[] bytes = new byte[1024];
int c;
while ((c = in.read(bytes)) != -1) {
os.write(bytes, 0, c);
}
} catch (IOException e) {
} finally {
if (in != null) {
in.close();
}
if (os != null) {
os.close();
}
}
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
closeFTPClient();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return uppath;
}
public static String getFileHouZhui(String filename) {
String fn[] = filename.split("[.]");
String houzhuiname = fn[fn.length - 1];
return houzhuiname;
}ACTION下載文件
這個是利用瀏覽器的下載功能,需先從配置文件中獲取ftp所需的基本信息 ip 登錄名 密碼 路徑
public String downFile() throws Exception {
String username = CommonProperties.getStringProperty("username");
String password = CommonProperties.getStringProperty("password");
String ip = CommonProperties.getStringProperty("ip");
String path = CommonProperties.getStringProperty("path");
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
response.setContentType("apploaction/x-download");
String filepath = new String(getDownpath().getBytes("ISO-8859-1"),"UTF-8");
String filename = filepath;
response.setHeader("Content-disposition", "attachment;filename="
+ new String(filename.getBytes("utf-8"), "ISO-8859-1"));
BufferedInputStream bis = null;
BufferedOutputStream bos = null;
try {
FtpClient ftp = new FtpClient(ip);
ftp.login(username, password);
ftp.binary();
if (path.length() != 0) {
ftp.cd(path);
}
ServletOutputStream sout = response.getOutputStream();
TelnetInputStream is = ftp.get(filepath);
bis = new BufferedInputStream(is);
bos = new BufferedOutputStream(sout);
byte[] bytes = new byte[1024];
int c;
while ((c = bis.read(bytes)) != -1) {
bos.write(bytes, 0, c);
}
bos.close();
is.close();
bis.close();
} catch (IOException ex) {
ex.printStackTrace();
}
return null;
}