java 文件操作工具类
2015-03-24 23:50
190 查看
1. 获取绝对路径
前一段做个程序，遇到了这样一个问题，想利用相对路径删掉一个文件(实际存在的),老是删不掉. 真是急人呀，最后让我费了好大力气才算把它解决掉，问题不防跟大家说说，万一遇到这样的问题，就不用再费劲了！
情况是这样的：我的Tomcat装在了c盘，而我的虚拟目录设在了E:/work下， 我在E:/work/test/image下有个图片，test.gif 我想通过程序删掉它，但他的绝对路径不确定(为了考虑到程序以后的移植,绝对路径是不确定的)。
假设del.jsp文件在e:/work/test 下，用下面的程序好像可以删掉：
<!--原始的del.jsp源文件-->
<%@ page contentType="text/html; charset=GBK" errorPage="" %>
<%request.setCharacterEncoding("GBK");%>
<%@ page language="java" import="java.sql.*" import="java.util.*" import ="java.text.*" import="java.io.*"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>删除成功页面</title>
</head>
<body>
File f=new File("/image/",test.gif);
boolean a=f.delete();
out.print("a="+a);
</body>
</html>
但事实上不行，你会发现a=false;
这就需要获取其绝对路径， 我们用java程序来做一个专门来获取绝对路径的javaBean(path_test.java)就可以了。
path_test.java的代码如下：
package pathtest;
import java.io.*;
import javax.servlet.*;
import javax.servlet.jsp.PageContext;//导入PageContext类，不要忘了
public class path_test
{
protected ServletContext m_application;
private boolean m_denyPhysicalPath;
public path_test()
{
}
public final void initialize(PageContext pageContext)
throws ServletException
{
m_application = pageContext.getServletContext();
}
public String getPhysicalPath(String filePathName, int option)
throws IOException
{
String path = new String();
String fileName = new String();
String fileSeparator = new String();
boolean isPhysical = false;
fileSeparator=System.getProperty("file.separator");
if(filePathName == null)
throw new IllegalArgumentException("There is no specified destination file (1140).");
if(filePathName.equals(""))
throw new IllegalArgumentException("There is no specified destination file (1140).");
if(filePathName.lastIndexOf("\\") >= 0)
{
path = filePathName.substring(0, filePathName.lastIndexOf("\\"));
fileName = filePathName.substring(filePathName.lastIndexOf("\\") + 1);
}
if(filePathName.lastIndexOf("/") >= 0)
{
path = filePathName.substring(0, filePathName.lastIndexOf("/"));
fileName = filePathName.substring(filePathName.lastIndexOf("/") + 1);
}
path = path.length() != 0 ? path : "/";
java.io.File physicalPath = new java.io.File(path);
if(physicalPath.exists())
isPhysical = true;
if(option == 0)
{
if(isVirtual(path))
{
path = m_application.getRealPath(path);
if(path.endsWith(fileSeparator))
path = path + fileName;
else
path = String.valueOf((new StringBuffer(String.valueOf(path))).append(fileSeparator).append(fileName));
return path;
}
if(isPhysical)
{
if(m_denyPhysicalPath)
throw new IllegalArgumentException("Physical path is denied (1125).");
else
return filePathName;
} else
{
throw new IllegalArgumentException("This path does not exist (1135).");
}
}
if(option == 1)
{
if(isVirtual(path))
{
path = m_application.getRealPath(path);
if(path.endsWith(fileSeparator))
path = path + fileName;
else
path = String.valueOf((new StringBuffer(String.valueOf(path))).append(fileSeparator).append(fileName));
return path;
}
if(isPhysical)
throw new IllegalArgumentException("The path is not a virtual path.");
else
throw new IllegalArgumentException("This path does not exist (1135).");
}
if(option == 2)
{
if(isPhysical)
if(m_denyPhysicalPath)
throw new IllegalArgumentException("Physical path is denied (1125).");
else
return filePathName;
if(isVirtual(path))
throw new IllegalArgumentException("The path is not a physical path.");
else
throw new IllegalArgumentException("This path does not exist (1135).");
}
else
{
return null;
}
}
private boolean isVirtual(String pathName) //判断是否是虚拟路径
{
if(m_application.getRealPath(pathName) != null)
{
java.io.File virtualFile = new java.io.File(m_application.getRealPath(pathName));
return virtualFile.exists();
}
else
{
return false;
}
}
}
对path_test.java编译后，得到包pathtest,里面有path_test.class类，
把整个包放到虚拟目录的classes下，然后再把del.jsp文件改成如下程序，一切都OK了！
<!--改后的del.jsp的源文件-->
<%@ page contentType="text/html; charset=GBK" errorPage="" %>
<%request.setCharacterEncoding("GBK");%>
<%@ page language="java" import="java.sql.*" import="java.util.*" import ="java.text.*" import="java.io.*"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>删除成功页面</title>
</head>
<body>
<jsp:useBean id="pathtest" scope="page" class="pathtest.path_test" />
pathtest.initialize(pageContext);//初始化
String dir1=pathtest.getPhysicalPath("/test/image/",0);//传参数
out.print(dir1);//输出的是绝对路径
File file=new File(dir1,"test.gif");//生成文件对象
boolean a=file.delete();
out.print("a="+a);
</body">
</html>
此时a=true;表示删除成功！
到此为止，问题全部搞定。
2. 文件操作工具类
package com.common.file;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.DateFormat;
import java.util.Date;
import java.util.Iterator;
import javax.swing.text.html.HTMLDocument.HTMLReader.FormAction;
/**
*
* 功能描述：
*
* @author Administrator
* @Date Jul 19, 2008
* @Time 9:46:11 AM
* @version 1.0
*/
public class FileUtil {
/**
* 功能描述：列出某文件夹及其子文件夹下面的文件，并可根据扩展名过滤
*
* @param path
* 文件夹
*/
public static void list(File path) {
if (!path.exists()) {
System.out.println("文件名称不存在!");
} else {
if (path.isFile()) {
if (path.getName().toLowerCase().endsWith(".pdf")
|| path.getName().toLowerCase().endsWith(".doc")
|| path.getName().toLowerCase().endsWith(".chm")
|| path.getName().toLowerCase().endsWith(".html")
|| path.getName().toLowerCase().endsWith(".htm")) {// 文件格式
System.out.println(path);
System.out.println(path.getName());
}
} else {
File[] files = path.listFiles();
for (int i = 0; i < files.length; i++) {
list(files[i]);
}
}
}
}
/**
* 功能描述：拷贝一个目录或者文件到指定路径下，即把源文件拷贝到目标文件路径下
*
* @param source
* 源文件
* @param target
* 目标文件路径
* @return void
*/
public static void copy(File source, File target) {
File tarpath = new File(target, source.getName());
if (source.isDirectory()) {
tarpath.mkdir();
File[] dir = source.listFiles();
for (int i = 0; i < dir.length; i++) {
copy(dir[i], tarpath);
}
} else {
try {
InputStream is = new FileInputStream(source); // 用于读取文件的原始字节流
OutputStream os = new FileOutputStream(tarpath); // 用于写入文件的原始字节的流
byte[] buf = new byte[1024];// 存储读取数据的缓冲区大小
int len = 0;
while ((len = is.read(buf)) != -1) {
os.write(buf, 0, len);
}
is.close();
os.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
// File file = new File("D:\\个人资料\\MySQL 5");
// list(file);
Date myDate = new Date();
DateFormat df = DateFormat.getDateInstance();
System.out.println(df.format(myDate));
}
}
3. 文件压缩，解压，删除，拷贝
此类包含利用JAVA进行文件的压缩，解压，删除，拷贝操作。部分代码总结了网上的代码，并修正了很多BUG,例如压缩中文问题，压缩文件中多余空文件问题。
注意：此类中用到的压缩类ZipEntry等都来自于org.apache.tools包而非java.util。此包在ant.jar中有。
/*
* Version information
*
* Date:2008-6-26
*
* Copyright (C) 2008 Chris.Tu
*/
package test;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* java文件操作工具类
* @author Chris
* @version 2008-6-26
*/
public class FileUtil {
protected static Logger log = LoggerFactory.getLogger(FileUtil.class);
/**
* 压缩文件
* @param inputFileName 要压缩的文件或文件夹路径，例如：c:\\a.txt,c:\\a\
* @param outputFileName 输出zip文件的路径，例如：c:\\a.zip
*/
public static void zip(String inputFileName, String outputFileName) throws Exception {
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outputFileName));
zip(out, new File(inputFileName), "");
log.debug("压缩完成！");
out.closeEntry();
out.close();
}
/**
* 压缩文件
* @param out org.apache.tools.zip.ZipOutputStream
* @param file 待压缩的文件
* @param base 压缩的根目录
*/
private static void zip(ZipOutputStream out, File file, String base) throws Exception {
if (file.isDirectory()) {
File[] fl = file.listFiles();
base = base.length() == 0 ? "" : base + File.separator;
for (int i = 0; i < fl.length; i++) {
zip(out, fl[i], base + fl[i].getName());
}
} else {
out.putNextEntry(new ZipEntry(base));
log.debug("添加压缩文件：" + base);
FileInputStream in = new FileInputStream(file);
int b;
while ((b = in.read()) != -1) {
out.write(b);
}
in.close();
}
}
/**
* 解压zip文件
* @param zipFileName 待解压的zip文件路径，例如：c:\\a.zip
* @param outputDirectory 解压目标文件夹,例如：c:\\a\
*/
public static void unZip(String zipFileName, String outputDirectory) throws Exception {
ZipFile zipFile = new ZipFile(zipFileName);
try {
Enumeration<?> e = zipFile.getEntries();
ZipEntry zipEntry = null;
createDirectory(outputDirectory, "");
while (e.hasMoreElements()) {
zipEntry = (ZipEntry) e.nextElement();
log.debug("解压：" + zipEntry.getName());
if (zipEntry.isDirectory()) {
String name = zipEntry.getName();
name = name.substring(0, name.length() - 1);
File f = new File(outputDirectory + File.separator + name);
f.mkdir();
log.debug("创建目录：" + outputDirectory + File.separator + name);
} else {
String fileName = zipEntry.getName();
fileName = fileName.replace('\\', '/');
if (fileName.indexOf("/") != -1) {
createDirectory(outputDirectory, fileName.substring(0, fileName.lastIndexOf("/")));
fileName = fileName.substring(fileName.lastIndexOf("/") + 1, fileName.length());
}
File f = new File(outputDirectory + File.separator + zipEntry.getName());
f.createNewFile();
InputStream in = zipFile.getInputStream(zipEntry);
FileOutputStream out = new FileOutputStream(f);
byte[] by = new byte[1024];
int c;
while ((c = in.read(by)) != -1) {
out.write(by, 0, c);
}
in.close();
out.close();
}
}
} catch (Exception ex) {
System.out.println(ex.getMessage());
} finally {
zipFile.close();
log.debug("解压完成！");
}
}
private static void createDirectory(String directory, String subDirectory) {
String dir[];
File fl = new File(directory);
try {
if (subDirectory == "" && fl.exists() != true) {
fl.mkdir();
} else if (subDirectory != "") {
dir = subDirectory.replace('\\', '/').split("/");
for (int i = 0; i < dir.length; i++) {
File subFile = new File(directory + File.separator + dir[i]);
if (subFile.exists() == false)
subFile.mkdir();
directory += File.separator + dir[i];
}
}
} catch (Exception ex) {
System.out.println(ex.getMessage());
}
}
/**
* 拷贝文件夹中的所有文件到另外一个文件夹
* @param srcDirector 源文件夹
* @param desDirector 目标文件夹
*/
public static void copyFileWithDirector(String srcDirector, String desDirector) throws IOException {
(new File(desDirector)).mkdirs();
File[] file = (new File(srcDirector)).listFiles();
for (int i = 0; i < file.length; i++) {
if (file[i].isFile()) {
log.debug("拷贝：" + file[i].getAbsolutePath() + "-->" + desDirector + "/" + file[i].getName());
FileInputStream input = new FileInputStream(file[i]);
FileOutputStream output = new FileOutputStream(desDirector + "/" + file[i].getName());
byte[] b = new byte[1024 * 5];
int len;
while ((len = input.read(b)) != -1) {
output.write(b, 0, len);
}
output.flush();
output.close();
input.close();
}
if (file[i].isDirectory()) {
log.debug("拷贝：" + file[i].getAbsolutePath() + "-->" + desDirector + "/" + file[i].getName());
copyFileWithDirector(srcDirector + "/" + file[i].getName(), desDirector + "/" + file[i].getName());
}
}
}
/**
* 删除文件夹
* @param folderPath folderPath 文件夹完整绝对路径
*/
public static void delFolder(String folderPath) throws Exception {
//删除完里面所有内容
delAllFile(folderPath);
String filePath = folderPath;
filePath = filePath.toString();
File myFilePath = new File(filePath);
//删除空文件夹
myFilePath.delete();
}
/**
* 删除指定文件夹下所有文件
* @param path 文件夹完整绝对路径
*/
public static boolean delAllFile(String path) throws Exception {
boolean flag = false;
File file = new File(path);
if (!file.exists()) {
return flag;
}
if (!file.isDirectory()) {
return flag;
}
String[] tempList = file.list();
File temp = null;
for (int i = 0; i < tempList.length; i++) {
if (path.endsWith(File.separator)) {
temp = new File(path + tempList[i]);
} else {
temp = new File(path + File.separator + tempList[i]);
}
if (temp.isFile()) {
temp.delete();
}
if (temp.isDirectory()) {
//先删除文件夹里面的文件
delAllFile(path + "/" + tempList[i]);
//再删除空文件夹
delFolder(path + "/" + tempList[i]);
flag = true;
}
}
return flag;
}
}
[java]一个压缩工具类 zip2008年05月28日 星期三 17:48/*
* Zip.java
*
* Created on 2008年4月2日, 下午2:20
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package com.founder.mnp.utl;
/**
*
* @author GuoJiale
*/
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
public class ZipUtils {
static final int BUFFER = 2048;
public static boolean zip( String[] filename ,String outname){
boolean test = true;
try {
BufferedInputStream origin = null;
FileOutputStream dest = new FileOutputStream(outname);
ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(
dest));
byte data[] = new byte[BUFFER];
// File f= new File("d:\\111\\");
// File files[] = f.listFiles();
for (int i = 0; i < filename.length; i++) {
File file = new File(filename[i]);
FileInputStream fi = new FileInputStream(file);
origin = new BufferedInputStream(fi, BUFFER);
ZipEntry entry = new ZipEntry(file.getName());
out.putNextEntry(entry);
int count;
while ((count = origin.read(data, 0, BUFFER)) != -1) {
out.write(data, 0, count);
}
origin.close();
}
out.close();
} catch (Exception e) {
test = false;
e.printStackTrace();
}
return test;
}
public static void main(String argv[]) {
// File f= new File("d:\\111\\");
String[] filenames = new String[]{"E:/mnpdata/ad/temp/1209014565259/郁香.jpg"};
zip(filenames,"c:/myfui.zip");
}
}
前一段做个程序，遇到了这样一个问题，想利用相对路径删掉一个文件(实际存在的),老是删不掉. 真是急人呀，最后让我费了好大力气才算把它解决掉，问题不防跟大家说说，万一遇到这样的问题，就不用再费劲了！
情况是这样的：我的Tomcat装在了c盘，而我的虚拟目录设在了E:/work下， 我在E:/work/test/image下有个图片，test.gif 我想通过程序删掉它，但他的绝对路径不确定(为了考虑到程序以后的移植,绝对路径是不确定的)。
假设del.jsp文件在e:/work/test 下，用下面的程序好像可以删掉：
<!--原始的del.jsp源文件-->
<%@ page contentType="text/html; charset=GBK" errorPage="" %>
<%request.setCharacterEncoding("GBK");%>
<%@ page language="java" import="java.sql.*" import="java.util.*" import ="java.text.*" import="java.io.*"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>删除成功页面</title>
</head>
<body>
File f=new File("/image/",test.gif);
boolean a=f.delete();
out.print("a="+a);
</body>
</html>
但事实上不行，你会发现a=false;
这就需要获取其绝对路径， 我们用java程序来做一个专门来获取绝对路径的javaBean(path_test.java)就可以了。
path_test.java的代码如下：
package pathtest;
import java.io.*;
import javax.servlet.*;
import javax.servlet.jsp.PageContext;//导入PageContext类，不要忘了
public class path_test
{
protected ServletContext m_application;
private boolean m_denyPhysicalPath;
public path_test()
{
}
public final void initialize(PageContext pageContext)
throws ServletException
{
m_application = pageContext.getServletContext();
}
public String getPhysicalPath(String filePathName, int option)
throws IOException
{
String path = new String();
String fileName = new String();
String fileSeparator = new String();
boolean isPhysical = false;
fileSeparator=System.getProperty("file.separator");
if(filePathName == null)
throw new IllegalArgumentException("There is no specified destination file (1140).");
if(filePathName.equals(""))
throw new IllegalArgumentException("There is no specified destination file (1140).");
if(filePathName.lastIndexOf("\\") >= 0)
{
path = filePathName.substring(0, filePathName.lastIndexOf("\\"));
fileName = filePathName.substring(filePathName.lastIndexOf("\\") + 1);
}
if(filePathName.lastIndexOf("/") >= 0)
{
path = filePathName.substring(0, filePathName.lastIndexOf("/"));
fileName = filePathName.substring(filePathName.lastIndexOf("/") + 1);
}
path = path.length() != 0 ? path : "/";
java.io.File physicalPath = new java.io.File(path);
if(physicalPath.exists())
isPhysical = true;
if(option == 0)
{
if(isVirtual(path))
{
path = m_application.getRealPath(path);
if(path.endsWith(fileSeparator))
path = path + fileName;
else
path = String.valueOf((new StringBuffer(String.valueOf(path))).append(fileSeparator).append(fileName));
return path;
}
if(isPhysical)
{
if(m_denyPhysicalPath)
throw new IllegalArgumentException("Physical path is denied (1125).");
else
return filePathName;
} else
{
throw new IllegalArgumentException("This path does not exist (1135).");
}
}
if(option == 1)
{
if(isVirtual(path))
{
path = m_application.getRealPath(path);
if(path.endsWith(fileSeparator))
path = path + fileName;
else
path = String.valueOf((new StringBuffer(String.valueOf(path))).append(fileSeparator).append(fileName));
return path;
}
if(isPhysical)
throw new IllegalArgumentException("The path is not a virtual path.");
else
throw new IllegalArgumentException("This path does not exist (1135).");
}
if(option == 2)
{
if(isPhysical)
if(m_denyPhysicalPath)
throw new IllegalArgumentException("Physical path is denied (1125).");
else
return filePathName;
if(isVirtual(path))
throw new IllegalArgumentException("The path is not a physical path.");
else
throw new IllegalArgumentException("This path does not exist (1135).");
}
else
{
return null;
}
}
private boolean isVirtual(String pathName) //判断是否是虚拟路径
{
if(m_application.getRealPath(pathName) != null)
{
java.io.File virtualFile = new java.io.File(m_application.getRealPath(pathName));
return virtualFile.exists();
}
else
{
return false;
}
}
}
对path_test.java编译后，得到包pathtest,里面有path_test.class类，
把整个包放到虚拟目录的classes下，然后再把del.jsp文件改成如下程序，一切都OK了！
<!--改后的del.jsp的源文件-->
<%@ page contentType="text/html; charset=GBK" errorPage="" %>
<%request.setCharacterEncoding("GBK");%>
<%@ page language="java" import="java.sql.*" import="java.util.*" import ="java.text.*" import="java.io.*"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>删除成功页面</title>
</head>
<body>
<jsp:useBean id="pathtest" scope="page" class="pathtest.path_test" />
pathtest.initialize(pageContext);//初始化
String dir1=pathtest.getPhysicalPath("/test/image/",0);//传参数
out.print(dir1);//输出的是绝对路径
File file=new File(dir1,"test.gif");//生成文件对象
boolean a=file.delete();
out.print("a="+a);
</body">
</html>
此时a=true;表示删除成功！
到此为止，问题全部搞定。
2. 文件操作工具类
package com.common.file;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.DateFormat;
import java.util.Date;
import java.util.Iterator;
import javax.swing.text.html.HTMLDocument.HTMLReader.FormAction;
/**
*
* 功能描述：
*
* @author Administrator
* @Date Jul 19, 2008
* @Time 9:46:11 AM
* @version 1.0
*/
public class FileUtil {
/**
* 功能描述：列出某文件夹及其子文件夹下面的文件，并可根据扩展名过滤
*
* @param path
* 文件夹
*/
public static void list(File path) {
if (!path.exists()) {
System.out.println("文件名称不存在!");
} else {
if (path.isFile()) {
if (path.getName().toLowerCase().endsWith(".pdf")
|| path.getName().toLowerCase().endsWith(".doc")
|| path.getName().toLowerCase().endsWith(".chm")
|| path.getName().toLowerCase().endsWith(".html")
|| path.getName().toLowerCase().endsWith(".htm")) {// 文件格式
System.out.println(path);
System.out.println(path.getName());
}
} else {
File[] files = path.listFiles();
for (int i = 0; i < files.length; i++) {
list(files[i]);
}
}
}
}
/**
* 功能描述：拷贝一个目录或者文件到指定路径下，即把源文件拷贝到目标文件路径下
*
* @param source
* 源文件
* @param target
* 目标文件路径
* @return void
*/
public static void copy(File source, File target) {
File tarpath = new File(target, source.getName());
if (source.isDirectory()) {
tarpath.mkdir();
File[] dir = source.listFiles();
for (int i = 0; i < dir.length; i++) {
copy(dir[i], tarpath);
}
} else {
try {
InputStream is = new FileInputStream(source); // 用于读取文件的原始字节流
OutputStream os = new FileOutputStream(tarpath); // 用于写入文件的原始字节的流
byte[] buf = new byte[1024];// 存储读取数据的缓冲区大小
int len = 0;
while ((len = is.read(buf)) != -1) {
os.write(buf, 0, len);
}
is.close();
os.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
// File file = new File("D:\\个人资料\\MySQL 5");
// list(file);
Date myDate = new Date();
DateFormat df = DateFormat.getDateInstance();
System.out.println(df.format(myDate));
}
}
3. 文件压缩，解压，删除，拷贝
此类包含利用JAVA进行文件的压缩，解压，删除，拷贝操作。部分代码总结了网上的代码，并修正了很多BUG,例如压缩中文问题，压缩文件中多余空文件问题。
注意：此类中用到的压缩类ZipEntry等都来自于org.apache.tools包而非java.util。此包在ant.jar中有。
/*
* Version information
*
* Date:2008-6-26
*
* Copyright (C) 2008 Chris.Tu
*/
package test;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.apache.tools.zip.ZipOutputStream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* java文件操作工具类
* @author Chris
* @version 2008-6-26
*/
public class FileUtil {
protected static Logger log = LoggerFactory.getLogger(FileUtil.class);
/**
* 压缩文件
* @param inputFileName 要压缩的文件或文件夹路径，例如：c:\\a.txt,c:\\a\
* @param outputFileName 输出zip文件的路径，例如：c:\\a.zip
*/
public static void zip(String inputFileName, String outputFileName) throws Exception {
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(outputFileName));
zip(out, new File(inputFileName), "");
log.debug("压缩完成！");
out.closeEntry();
out.close();
}
/**
* 压缩文件
* @param out org.apache.tools.zip.ZipOutputStream
* @param file 待压缩的文件
* @param base 压缩的根目录
*/
private static void zip(ZipOutputStream out, File file, String base) throws Exception {
if (file.isDirectory()) {
File[] fl = file.listFiles();
base = base.length() == 0 ? "" : base + File.separator;
for (int i = 0; i < fl.length; i++) {
zip(out, fl[i], base + fl[i].getName());
}
} else {
out.putNextEntry(new ZipEntry(base));
log.debug("添加压缩文件：" + base);
FileInputStream in = new FileInputStream(file);
int b;
while ((b = in.read()) != -1) {
out.write(b);
}
in.close();
}
}
/**
* 解压zip文件
* @param zipFileName 待解压的zip文件路径，例如：c:\\a.zip
* @param outputDirectory 解压目标文件夹,例如：c:\\a\
*/
public static void unZip(String zipFileName, String outputDirectory) throws Exception {
ZipFile zipFile = new ZipFile(zipFileName);
try {
Enumeration<?> e = zipFile.getEntries();
ZipEntry zipEntry = null;
createDirectory(outputDirectory, "");
while (e.hasMoreElements()) {
zipEntry = (ZipEntry) e.nextElement();
log.debug("解压：" + zipEntry.getName());
if (zipEntry.isDirectory()) {
String name = zipEntry.getName();
name = name.substring(0, name.length() - 1);
File f = new File(outputDirectory + File.separator + name);
f.mkdir();
log.debug("创建目录：" + outputDirectory + File.separator + name);
} else {
String fileName = zipEntry.getName();
fileName = fileName.replace('\\', '/');
if (fileName.indexOf("/") != -1) {
createDirectory(outputDirectory, fileName.substring(0, fileName.lastIndexOf("/")));
fileName = fileName.substring(fileName.lastIndexOf("/") + 1, fileName.length());
}
File f = new File(outputDirectory + File.separator + zipEntry.getName());
f.createNewFile();
InputStream in = zipFile.getInputStream(zipEntry);
FileOutputStream out = new FileOutputStream(f);
byte[] by = new byte[1024];
int c;
while ((c = in.read(by)) != -1) {
out.write(by, 0, c);
}
in.close();
out.close();
}
}
} catch (Exception ex) {
System.out.println(ex.getMessage());
} finally {
zipFile.close();
log.debug("解压完成！");
}
}
private static void createDirectory(String directory, String subDirectory) {
String dir[];
File fl = new File(directory);
try {
if (subDirectory == "" && fl.exists() != true) {
fl.mkdir();
} else if (subDirectory != "") {
dir = subDirectory.replace('\\', '/').split("/");
for (int i = 0; i < dir.length; i++) {
File subFile = new File(directory + File.separator + dir[i]);
if (subFile.exists() == false)
subFile.mkdir();
directory += File.separator + dir[i];
}
}
} catch (Exception ex) {
System.out.println(ex.getMessage());
}
}
/**
* 拷贝文件夹中的所有文件到另外一个文件夹
* @param srcDirector 源文件夹
* @param desDirector 目标文件夹
*/
public static void copyFileWithDirector(String srcDirector, String desDirector) throws IOException {
(new File(desDirector)).mkdirs();
File[] file = (new File(srcDirector)).listFiles();
for (int i = 0; i < file.length; i++) {
if (file[i].isFile()) {
log.debug("拷贝：" + file[i].getAbsolutePath() + "-->" + desDirector + "/" + file[i].getName());
FileInputStream input = new FileInputStream(file[i]);
FileOutputStream output = new FileOutputStream(desDirector + "/" + file[i].getName());
byte[] b = new byte[1024 * 5];
int len;
while ((len = input.read(b)) != -1) {
output.write(b, 0, len);
}
output.flush();
output.close();
input.close();
}
if (file[i].isDirectory()) {
log.debug("拷贝：" + file[i].getAbsolutePath() + "-->" + desDirector + "/" + file[i].getName());
copyFileWithDirector(srcDirector + "/" + file[i].getName(), desDirector + "/" + file[i].getName());
}
}
}
/**
* 删除文件夹
* @param folderPath folderPath 文件夹完整绝对路径
*/
public static void delFolder(String folderPath) throws Exception {
//删除完里面所有内容
delAllFile(folderPath);
String filePath = folderPath;
filePath = filePath.toString();
File myFilePath = new File(filePath);
//删除空文件夹
myFilePath.delete();
}
/**
* 删除指定文件夹下所有文件
* @param path 文件夹完整绝对路径
*/
public static boolean delAllFile(String path) throws Exception {
boolean flag = false;
File file = new File(path);
if (!file.exists()) {
return flag;
}
if (!file.isDirectory()) {
return flag;
}
String[] tempList = file.list();
File temp = null;
for (int i = 0; i < tempList.length; i++) {
if (path.endsWith(File.separator)) {
temp = new File(path + tempList[i]);
} else {
temp = new File(path + File.separator + tempList[i]);
}
if (temp.isFile()) {
temp.delete();
}
if (temp.isDirectory()) {
//先删除文件夹里面的文件
delAllFile(path + "/" + tempList[i]);
//再删除空文件夹
delFolder(path + "/" + tempList[i]);
flag = true;
}
}
return flag;
}
}
[java]一个压缩工具类 zip2008年05月28日 星期三 17:48/*
* Zip.java
*
* Created on 2008年4月2日, 下午2:20
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package com.founder.mnp.utl;
/**
*
* @author GuoJiale
*/
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;
public class ZipUtils {
static final int BUFFER = 2048;
public static boolean zip( String[] filename ,String outname){
boolean test = true;
try {
BufferedInputStream origin = null;
FileOutputStream dest = new FileOutputStream(outname);
ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(
dest));
byte data[] = new byte[BUFFER];
// File f= new File("d:\\111\\");
// File files[] = f.listFiles();
for (int i = 0; i < filename.length; i++) {
File file = new File(filename[i]);
FileInputStream fi = new FileInputStream(file);
origin = new BufferedInputStream(fi, BUFFER);
ZipEntry entry = new ZipEntry(file.getName());
out.putNextEntry(entry);
int count;
while ((count = origin.read(data, 0, BUFFER)) != -1) {
out.write(data, 0, count);
}
origin.close();
}
out.close();
} catch (Exception e) {
test = false;
e.printStackTrace();
}
return test;
}
public static void main(String argv[]) {
// File f= new File("d:\\111\\");
String[] filenames = new String[]{"E:/mnpdata/ad/temp/1209014565259/郁香.jpg"};
zip(filenames,"c:/myfui.zip");
}
}
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