JDK1.7以上javaFTP上传删除文件的实现方法

实例如下：

packagecom.itv.launcher.util;
 
importjava.io.file;
importjava.io.fileinputstream;
importjava.io.filenotfoundexception;
importjava.io.ioexception;
importjava.net.inetsocketaddress;
importjava.util.properties;
importjava.util.stringtokenizer;
 
importsun.net.telnetoutputstream;
importsun.net.ftp.ftpclient;
importsun.net.ftp.ftpprotocolexception;
 
/**
 *
 ftp上传工具类
 *
 *
 @author yanzhou
 *
 @version v1.0
 */
publicclass
ftputil {
 
  privatestatic
ftpclient ftpclient = null;
  privatestatic
final 
string url;
  privatestatic
final 
int 
port;
  privatestatic
final 
string user;
  privatestatic
final 
string password;
  privatestatic
final 
string remotefilepath;
 
  static{
    properties
 ftppro = readftpproperties.getmsgfrompro();
    url
 = ftppro.getproperty("ftp_url");
    port
 = integer.parseint(ftppro.getproperty("ftp_port"));
    user
 = ftppro.getproperty("ftp_user");
    password
 = ftppro.getproperty("ftp_password");
    remotefilepath
 = ftppro.getproperty("ftp_remote_filepath");
 
  }
 
  /**
   *
 链接ftp
   *
 @throws ftpprotocolexception 
   */
  privatestatic
void 
connectftp() throwsftpprotocolexception
 {
    try{
      ftpclient
 = ftpclient.create();
      ftpclient.connect(newinetsocketaddress(url,
 port));
      ftpclient.login(user,
 password.tochararray());
      ftpclient.setbinarytype();
      if(!"".equals(remotefilepath)
 && remotefilepath != null)
 {
        ftpclient.changedirectory(remotefilepath);
      }
    }catch(ioexception
 e) {
      e.printstacktrace();
    }
  }
 
  /**
   *
 关闭ftp链接
   */
  publicstatic
void 
closeftp() {
    try{
      if(ftpclient
 != null)
 {
        ftpclient.close();
      }
    }catch(ioexception
 e) {
      e.printstacktrace();
    }
  }
 
  /**
   *
 上传文件到ftp
   *
 @param file file文件，struts2从页面得到的file类型
   *
 @param filepath 要保存在ftp上的路径（文件夹）
   *
 @param filename 文件名（test001.jpg）
   *
 @return 文件是否上传成功
   *
 @throws exception
   */
  publicstatic
boolean 
upload(file file, string filepath, string filename) {
    telnetoutputstream
 to = null;
    fileinputstream
 fi = null;
    filepath
 = remotefilepath + constants.file_separator + filepath;
    try{
      if(file
 != null)
 {
        connectftp();
        if(!isdirexist(filepath.replace("\\","/")))
 {
          createdir(filepath.replace("\\","/"));
          ftpclient.changedirectory(filepath.replace("\\","/"));
        }
        fi
 = newfileinputstream(file);
        to
 = (telnetoutputstream) ftpclient.putfilestream(filename, true);
        byte[]
 bytes = newbyte[1024];
        inti
 = fi.read(bytes);
        while(i
 != -1)
 {
          to.write(bytes);
          i
 = fi.read(bytes);
        }
      }
      returntrue;
    }catch(filenotfoundexception
 e1) {
      returnfalse;
    }catch(ioexception
 e2) {
      returnfalse;
    }catch(exception
 e) {
      returnfalse;
    }finally{
      if(fi
 != null)
 {
        try{
          fi.close();
        }catch(ioexception
 e) {
          e.printstacktrace();
        }
      }
      if(to
 != null)
 {
        try{
          to.flush();
          to.close();
        }catch(ioexception
 e) {
          e.printstacktrace();
        }
      }
      closeftp();
    }
  }
 
  /**
   *
 删除ftp制定目录下的文件
   *
 @param filepath 文件在ftp存储的路径
   *
 @param filename 要删除的文件名称
   *
 @return 是否删除成功
   */
  publicstatic
boolean 
deletefileftp(string filepath, string filename){ 
    try{
      connectftp();
      filepath
 = remotefilepath + constants.file_separator + filepath + constants.file_separator;
      if(!isdirexist(filepath.replace("\\","/")))
 {
        returnfalse;
      }
      ftpclient.changedirectory(filepath.replace("\\","/"));
      ftpclient.deletefile(filename);
      returntrue;
    }catch(exception
 e) {
      e.printstacktrace();
      returnfalse;
    }finally{
      closeftp();
    }
  }
  /**
   *
 检查文件夹是否存在
   *
   *
 @param dir
   *
 @param ftpclient
   *
 @return
   */
  privatestatic
boolean isdirexist(string dir) {
    try{
      ftpclient.changedirectory(dir);
    }catch(exception
 e) {
      returnfalse;
    }
    returntrue;
  }
 
  /**
   *
 创建文件夹
   *
   *
 @param dir
   *
 @param ftpclient
   *
 @throws exception
   */
  privatestatic
void 
createdir(string dir) throwsexception
 {
    ftpclient.setasciitype();
    stringtokenizer
 s = newstringtokenizer(dir,
"/");//
 sign
    s.counttokens();
    string
 pathname = "";
    while(s.hasmoreelements())
 {
      pathname
 = pathname + "/"+
 (string) s.nextelement();
      try{
        ftpclient.makedirectory(pathname);
      }catch(exception
 e) {
        e
 = null;
      }
    }
    ftpclient.setbinarytype();
 
  }
 
}

2. 常量类，系统的路径分隔符

packagecom.itv.launcher.util;
 
publicinterface
constants {
   
  //路径分隔符
  publicstatic
string file_separator = system.getproperty("file.separator");
}

3. ftp链接的配置properties文件，包括用户名密码一些信息    

#ftp的ip地址
ftp_url=127.0.0.1
#ftp端口号
ftp_port=1234
#用户名
ftp_user=yanzhou
#密码
ftp_password=abcdefg12345
#ftp账号目录
ftp_remote_filepath=

以上这篇jdk1.7以上javaftp上传删除文件的实现方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。