package com.ucf.gatewaycheck.utils;
import java.util.zip.GZIPInputStream;
import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import org.apache.log4j.Logger;
public class GZIPFileUtil {
private static final Logger log=Logger.getLogger(GZIPFileUtil.class);
/**
* Uncompress the incoming file.
* @param inFileName Name of the file to be uncompressed
*/
public static String doUncompressFile(String inFileName) {
log.info("建行快捷对账文件解压文件名：["+inFileName+"]");
GZIPInputStream in = null;
FileOutputStream out = null;
try {
if (!getExtension(inFileName).equalsIgnoreCase("gz")) {
log.error("File name must have extension of \".gz\"");
System.exit(1);
}
try {
in = new GZIPInputStream(new FileInputStream(inFileName));
} catch(FileNotFoundException e) {
log.error("File not found. " + inFileName);
System.exit(1);
}
String outFileName = getFileName(inFileName);
try {
out = new FileOutputStream(outFileName);
} catch (FileNotFoundException e) {
log.error("Could not write to file. " + outFileName);
System.exit(1);
}
byte[] buf = new byte[1024];
int len;
while((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
log.info("建行快捷对账文件解压保存路径：["+outFileName+"]");
return outFileName;
} catch (IOException e) {
log.error("File write Fail!");
System.exit(1);
}finally{
try {
if (in != null) {
in.close();
}
if (out != null) {
out.close();
}
} catch (IOException e) {
log.error(e);
}
}
return null;
}
/**
* Used to extract and return the extension of a given file.
* @param f Incoming file to get the extension of
* @return <code>String</code> representing the extension of the incoming
* file.
*/
public static String getExtension(String f) {
String ext = "";
int i = f.lastIndexOf('.');
if (i > 0 && i < f.length() - 1) {
ext = f.substring(i+1);
}
return ext;
}
/**
* Used to extract the filename without its extension.
* @param f Incoming file to get the filename
* @return <code>String</code> representing the filename without its
* extension.
*/
public static String getFileName(String f) {
String fname = "";
int i = f.lastIndexOf('.');
if (i > 0 && i < f.length() - 1) {
fname = f.substring(0,i);
}
return fname;
}
/**
* Sole entry point to the class and application.
* @param args Array of String arguments.
*/
public static void main(String[] args) {
String mess=doUncompressFile("E:/CCBKJ/SHOP.105290073991463.20150329.KJZF.txt.gz");
System.out.println(mess);
}
}
文件压缩：
package com.ucf.gatewaycheck.service.impl;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.GZIPOutputStream;
public class CompressFileGZIP {
private static void doCompressFile(String inFileName) {
try {
System.out.println("Creating the GZIP output stream.");
String outFileName = inFileName + ".gz";
GZIPOutputStream out = null;
try {
out = new GZIPOutputStream(new FileOutputStream(outFileName));
} catch(FileNotFoundException e) {
System.err.println("Could not create file: " + outFileName);
System.exit(1);
}
System.out.println("Opening the input file.");
FileInputStream in = null;
try {
in = new FileInputStream(inFileName);
} catch (FileNotFoundException e) {
System.err.println("File not found. " + inFileName);
System.exit(1);
}
System.out.println("Transfering bytes from input file to GZIP Format.");
byte[] buf = new byte[1024];
int len;
while((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}
in.close();
System.out.println("Completing the GZIP file");
out.finish();
out.close();
} catch (IOException e) {
e.printStackTrace();
System.exit(1);
}
}
/**
* Sole entry point to the class and application.
* @param args Array of String arguments.
*/
public static void main(String[] args) {
String str="E:\\AUTORUN.INF";
doCompressFile(str);
}
}
转载请注明原文地址: https://ju.6miu.com/read-1308281.html
