com.ksyzt.gwt.server.common.ZipUtility Maven / Gradle / Ivy
/**
* 2010-4-12
*/
package com.ksyzt.gwt.server.common;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.net.URL;
import java.util.zip.CRC32;
import java.util.zip.CheckedInputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
// TODO: Auto-generated Javadoc
/**
* ZIP压缩工具.
*
* @author 梁栋
* @since 1.0
*/
public class ZipUtility {
/**
* The Constant EXT.
*/
public static final String EXT = ".zip";
/**
* The Constant BASE_DIR.
*/
private static final String BASE_DIR = "";
/**
* The Constant PATH.
*/
private static final String PATH = File.separator;
/**
* The Constant BUFFER.
*/
private static final int BUFFER = 1024;
/**
* Gets the class file.
*
* @param clazz the clazz
* @return the class file
*/
public static String getClassFile(Class clazz) {
String url;
try {
url = getClassPath(clazz);
if (url != null) {
int pos = url.lastIndexOf("!");
if (pos > 0) {
return url.substring(0, pos);
}
return null;
}
return null;
} catch (Exception e) {
return null;
}
}
/**
* 得到类的路径，例如E:/workspace/JavaGUI/bin/com/util.
*
* @param clazz the clazz
* @return the class path
* @throws Exception the exception
*/
public static String getClassPath(Class clazz) throws Exception {
try {
String strClassName = clazz.getName();
String strPackageName = "";
if (clazz.getPackage() != null) {
strPackageName = clazz.getPackage().getName();
}
String strClassFileName = "";
if (!"".equals(strPackageName)) {
strClassFileName = strClassName.substring(
strPackageName.length() + 1, strClassName.length());
} else {
strClassFileName = strClassName;
}
URL url = null;
url = clazz.getResource(strClassFileName + ".class");
String strURL = url.toString();
strURL = strURL.substring(strURL.indexOf('/'),
strURL.lastIndexOf('/'));
// 返回当前类的路径，并且处理路径中的空格，因为在路径中出现的空格如果不处理的话，
// //在访问时就会从空格处断开，那么也就取不到完整的信息了，这个问题在web开发中尤其要注意 return
// strURL.replaceAll("%, " ");
return strURL;
} catch (Exception ex) {
ex.printStackTrace();
throw ex;
}
}
/**
* 文件 解压缩.
*
* @param srcPath 源文件路径
* @param sourcepath the sourcepath
* @param replacepath the replacepath
* @throws Exception the exception
*/
public static void decompress(String srcPath, String sourcepath,
String replacepath) throws Exception {
File srcFile = new File(srcPath);
decompress(srcFile, sourcepath, replacepath);
}
/**
* 解压缩.
*
* @param srcFile the src file
* @param sourcepath the sourcepath
* @param replacepath the replacepath
* @throws Exception the exception
*/
public static void decompress(File srcFile, String sourcepath,
String replacepath) throws Exception {
String basePath = srcFile.getParent();
decompress(srcFile, basePath, sourcepath, replacepath);
}
/**
* 解压缩.
*
* @param srcFile the src file
* @param destFile the dest file
* @param sourcepath the sourcepath
* @param replacepath the replacepath
* @throws Exception the exception
*/
public static void decompress(File srcFile, File destFile,
String sourcepath, String replacepath) throws Exception {
CheckedInputStream cis = new CheckedInputStream(new FileInputStream(
srcFile), new CRC32());
ZipInputStream zis = new ZipInputStream(cis);
decompress(destFile, zis, sourcepath, replacepath);
zis.close();
}
/**
* 解压缩.
*
* @param srcFile the src file
* @param destPath the dest path
* @param sourcepath the sourcepath
* @param replacepath the replacepath
* @throws Exception the exception
*/
public static void decompress(File srcFile, String destPath,
String sourcepath, String replacepath) throws Exception {
decompress(srcFile, new File(destPath), sourcepath, replacepath);
}
/**
* 文件 解压缩.
*
* @param srcPath 源文件路径
* @param destPath 目标文件路径
* @param sourcePath the source path
* @param replacepath the replacepath
* @throws Exception the exception
*/
public static void decompress(String srcPath, String destPath,
String sourcePath, String replacepath) throws Exception {
File srcFile = new File(srcPath);
decompress(srcFile, destPath, sourcePath, replacepath);
}
/**
* 文件 解压缩.
*
* @param destFile 目标文件
* @param zis ZipInputStream
* @param sourcepath the sourcepath
* @param replacepath the replacepath
* @throws Exception the exception
*/
private static void decompress(File destFile, ZipInputStream zis,
String sourcepath, String replacepath) throws Exception {
ZipEntry entry = null;
while ((entry = zis.getNextEntry()) != null) {
if (sourcepath != null && sourcepath.length() > 0) {
// 需要判断是否要解压
if (entry.getName().startsWith(sourcepath)) {
String dir = destFile.getPath() + File.separator
+ entry.getName();
if (replacepath != null) {
dir = destFile.getPath()
+ File.separator
+ replacepath
+ File.separator
+ entry.getName()
.substring(sourcepath.length());
}
System.out.println("****Extacte " + entry.getName()
+ " to " + dir);
File dirFile = new File(dir);
// 文件检查
fileProber(dirFile);
if (entry.isDirectory()) {
dirFile.mkdirs();
} else {
decompressFile(dirFile, zis);
}
}
} else {
String dir = destFile.getPath() + File.separator
+ entry.getName();
File dirFile = new File(dir);
// 文件检查
fileProber(dirFile);
if (entry.isDirectory()) {
dirFile.mkdirs();
} else {
decompressFile(dirFile, zis);
}
}
zis.closeEntry();
}
}
/**
* 文件探针
*
*
* 当父目录不存在时，创建目录！.
*
* @param dirFile the dir file
*/
private static void fileProber(File dirFile) {
File parentFile = dirFile.getParentFile();
if (!parentFile.exists()) {
// 递归寻找上级目录
fileProber(parentFile);
parentFile.mkdir();
}
}
/**
* 文件解压缩.
*
* @param destFile 目标文件
* @param zis ZipInputStream
* @throws Exception the exception
*/
private static void decompressFile(File destFile, ZipInputStream zis)
throws Exception {
BufferedOutputStream bos = new BufferedOutputStream(
new FileOutputStream(destFile));
int count;
byte data[] = new byte[BUFFER];
while ((count = zis.read(data, 0, BUFFER)) != -1) {
bos.write(data, 0, count);
}
bos.close();
}
}
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