连接FTP 代码

public static boolean connectAndLogin(String host, int port, String ftpUser, String ftpPwd) {
		if (ftpClient == null) {
			ftpClient = new FTPClient();
		}
		try {
			ftpClient.connect(host, port);
			if (FTPReply.isPositiveCompletion(ftpClient.getReplyCode())) {
				if (ftpClient.login(ftpUser, ftpPwd)) {
					ftpClient.setBufferSize(102400);
					return true;
				} else {
					logger.error("登录ftp失败,请核对用户名密码");
				}
			} else {
				logger.error("ftp连接失败!!");
			}
		} catch (Exception e) {
			e.printStackTrace();
			logger.error("连接ftp异常:" + e.getLocalizedMessage());
		}
		return false;
	}

检查是否包含文件

public static boolean checkFTPFileExists(String filePath, final String fileName) {
		try {
			FTPFile[] fs = ftpClient.listFiles(filePath, new FTPFileFilter() {
				@Override
				public boolean accept(FTPFile ftpFile) {
					if (ftpFile.getName().equals(fileName)) {
						return true;
					}
					return false;
				}
			});
			if (fs.length > 0) {
				return true;
			}
		} catch (IOException e) {
			e.printStackTrace();
			logger.error("检查FTP文件[" + fileName + "]是否存在是异常:" + e.getLocalizedMessage());
		}
		return false;
	}

main函数

	public static void main(String[] args) {
		if(FTPUtil.connectAndLogin("192.168.83.130", 21, "samm", "samm")) {
			System.err.println("111111");
			if(FTPUtil.checkFTPFileExists("C:\\DCWORK\\DC4DW\\ReportFile\\2018\\Q2", "4f0905fdbd154f2681ac54df2ed1579a_1.xls")) {
				System.err.println("222222222");
			}else {
				System.err.println("3333");
			}
		}else {
			System.err.println("4444");
		}

		
	}

返回结果

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/E:/github/com.efraiser.sam/project/WebContent/WEB-INF/lib/slf4j-jdk14-1.7.9.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/E:/github/com.efraiser.sam/project/WebContent/WEB-INF/lib/logback-classic-1.0.6.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.JDK14LoggerFactory]
111111
3333

为什么一直得不到值，设置了ftpClient.enterLocalPassiveMode(); 也没用