java中直接判断ftp上文件夹下是否存在某文件的方法
package com.wyebd.task.receive;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Date;
import com.wyebd.publicuse.ApplicationResource;
public class FtpDownload {
/**
* @description:以非遍历ftp目录的方式下载文件,通过dos命令的方式直接进行文件下载,加快了下载速度
* @author RickyLee
* @time:2013-06-05 10:00
*/
// ftp地址
private String ftp1Ip = null;
// ftp用户名
private String ftp2User = null;
// ftp密码
private String ftp3Pass = null;
// ftp上文件存放的路径
private String ftp4Dir = null;
// ftp上的文件名
private String ftp5FileName = null;
// 存放到本地的文件的全路径
private String localFullFilePath = null;
public String getFtp1Ip() {
return ftp1Ip;
}
public void setFtp1Ip(String ftp1Ip) {
this.ftp1Ip = ftp1Ip;
}
public String getFtp2User() {
return ftp2User;
}
public void setFtp2User(String ftp2User) {
this.ftp2User = ftp2User;
}
public String getFtp3Pass() {
return ftp3Pass;
}
public void setFtp3Pass(String ftp3Pass) {
this.ftp3Pass = ftp3Pass;
}
public String getFtp4Dir() {
return ftp4Dir;
}
public void setFtp4Dir(String ftp4Dir) {
this.ftp4Dir = processDir(ftp4Dir);
}
public String getFtp5FileName() {
return ftp5FileName;
}
public void setFtp5FileName(String ftp5FileName) {
this.ftp5FileName = ftp5FileName;
}
public String getLocalFullFilePath() {
return localFullFilePath;
}
public void setLocalFullFilePath(String localFullFilePath) {
this.localFullFilePath = localFullFilePath;
}
// 开始执行下载任务,执行成功返回true,否则返回false
public boolean run() {
boolean b = false;
// 根据bean的信息生成bat文件,并返回bat文件的物理路径
String batPath = creatBat();
// 调用bat
b = runBat(batPath);
return b;
}
// 执行bat文件
private boolean runBat(String batPath) {
boolean b = false;
String command = "cmd /c start "+batPath;// exe,bat文件名OR DOS命令
String text=null;
try {
Process proc = Runtime.getRuntime().exec(command);
BufferedReader in = new BufferedReader(new InputStreamReader(proc
.getInputStream()));
while ((text = in.readLine()) != null) {
System.out.println(text); // 输出测试
}
} catch (IOException ioError) {
ioError.printStackTrace();
System.exit(0);
}
if (new File(localFullFilePath).exists())b = true;
return b;
}
// 根据用户提供的信息生成bat信息
private String creatBat() {
String path = ApplicationResource.getValueByKey("batPath") +"FtpDownload_"+new Date().getTime()+".bat";
File file = new File(path.substring(0, path.lastIndexOf("/")));
if (!file.exists())
file.mkdirs();
try {
FileWriter writer = new FileWriter(path, false);
writer.write("@echo on\n");
writer.write("set ftpfilename=autoftp.cfg\n");
writer.write("echo open " + ftp1Ip + " >\"%ftpfilename%\"\n");
writer.write("echo " + ftp2User + " >>\"%ftpfilename%\"\n");
writer.write("echo " + ftp3Pass + " >>\"%ftpfilename%\"\n");
writer.write("echo bin >>\"%ftpfilename%\"\n");
writer.write("echo cd " + ftp4Dir + " >>\"%ftpfilename%\"\n");
writer.write("echo get " + ftp5FileName + " " + localFullFilePath
+ " >>\"%ftpfilename%\"\n");
writer.write("echo bye >>\"%ftpfilename%\"\n");
writer.write("ftp -s:\"%ftpfilename%\"\n");
writer.write("exit");
writer.close();
} catch (IOException e) {
e.printStackTrace();
}
return path;
}
// 对ftp的Dir进行格式化处理
private String processDir(String fdir) {
fdir = fdir.replace("/", "\\").replace("\\\\", "\\");
if (fdir.startsWith("\\"))
fdir = fdir.substring(fdir.indexOf("\\") + 1);
if (fdir.endsWith("\\"))
fdir = fdir.substring(0, fdir.lastIndexOf("\\"));
return fdir;
}
// 主函数,用于测试
public static void main(String[] args) {
FtpDownload fd = new FtpDownload();
fd.setFtp1Ip("172.18.3.3");
fd.setFtp2User("mios");
fd.setFtp3Pass("m92102007");
fd.setFtp4Dir("bcbj\\zyt\\zds");
fd.setFtp5FileName("jqyb06.txt");
fd.setLocalFullFilePath("c:/param/jqyb06.txt");
System.out.println(fd.run());
}
}
package com.wyebd.hsms.publicUse;
import java.util.Enumeration;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;
import java.util.TreeMap;
import com.wyebd.hsms.utils.StringUtil;
/**
* 该类用于管理全局应用属性配置信息，以用于显示、提示、配置等信息的集中管理及国际化。
*
Title: 全局应用属性配置信息管理类
*
Description:
*
Copyright: Copyright (c) 2004
*
Company:
* @author RickyLee
* @version 1.0
*/
public class ApplicationResource
{
//存放全局应用属性配置信息的名、值对
private static TreeMap tmKeyValue = null;
//资源配置文件的文件名
private static final String APP_RESOURCE_FILENAME = "ApplicationResources";
/**
* 读取Web应用下的WEB-INF\classes目录下的对应的资源文件中的应用属性配置信息。
* @param filenameNoExt String 不带扩展名.properties的文件名
* @return String
*/
private static String getApplicationResources(String filenameNoExt)
{
String name = null;
String value = null;
tmKeyValue = new TreeMap();
PropertyResourceBundle configBundle = (PropertyResourceBundle)
ResourceBundle.getBundle(filenameNoExt);
Enumeration keys = configBundle.getKeys();
while (keys.hasMoreElements())
{
name = keys.nextElement().toString();
value = StringUtil.getStringISO8859_1(configBundle.getString(name));
//value = configBundle.getString(name);
tmKeyValue.put(name,value);
}
//查看系统资源配置情况
//System.out.println(tmKeyValue);
return value;
}
/**
* 从资源配置文件中根据键名取出其对应的值。
* @param key String 要取的资源标识名称
* @return String 根据资源标识名称从资源文件取得的值
*/
public static String getValueByKey(String key)
{
if (tmKeyValue == null)
getApplicationResources(APP_RESOURCE_FILENAME);
Object objTmp = tmKeyValue.get(key);
if (objTmp == null)
return "";
else
return objTmp.toString();
}
public static void main(String[] args)
{
String strNew = getValueByKey("driver");
System.out.println(strNew);
strNew = getValueByKey("url");
System.out.println(strNew);
//System.out.println();
//System.out.println(tmKeyValue);
}
}
DataSourceName= java\:comp/env/jdbc/generateDataSource
driver = net.sourceforge.jtds.jdbc.Driver
url = jdbc\:jtds\:sqlserver\://localhost\:1433/dbName
username = sa
password = root