将指定路径下的文件压缩至指定zip文件，并以指定密码加密(例如excel压缩后加密)

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;




import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


import net.lingala.zip4j.io.ZipOutputStream;
import net.lingala.zip4j.model.ZipParameters;
import net.lingala.zip4j.util.Zip4jConstants;


public class ExcelZip {
/**
* 日志记录
*/
private Logger logger = LoggerFactory.getLogger(ExcelZip.class);
/**
* 
* @Title: zipFilesAndEncrypt
* @Description: 将指定路径下的文件压缩至指定zip文件，并以指定密码加密 若密码为空，则不进行加密保护
* @param srcFileName
*            待压缩文件路径
* @param zipFileName
*            zip文件名
* @param password
*            加密密码
* @return
* @throws Exception
*/
public static void zipFilesAndEncrypt(String srcFileName, String zipFileName, String password) throws Exception {
ZipOutputStream outputStream = null;
InputStream inputStream = null;
if (StringUtils.isEmpty(srcFileName) || StringUtils.isEmpty(zipFileName)) {
throw new Exception("待压缩文件或者压缩文件名");
}
try {
File srcFile = new File(srcFileName);
File[] files = new File[0];
if (srcFile.isDirectory()) {
files = srcFile.listFiles();
} else {
files = new File[1];
files[0] = srcFile;
}
outputStream = new ZipOutputStream(new FileOutputStream(new File(zipFileName)));
ZipParameters parameters = new ZipParameters();
parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE);
parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_NORMAL);
if (!StringUtils.isEmpty(password)) {
parameters.setEncryptFiles(true);
// Zip4j supports AES or Standard Zip Encryption (also called
// ZipCrypto)
// If you choose to use Standard Zip Encryption, please have a
// look at example
// as some additional steps need to be done while using
// ZipOutputStreams with
// Standard Zip Encryption
parameters.setEncryptionMethod(Zip4jConstants.ENC_METHOD_AES);
parameters.setAesKeyStrength(Zip4jConstants.AES_STRENGTH_256);
parameters.setPassword(password);
}


// Now we loop through each file and read this file with an
// inputstream
// and write it to the ZipOutputStream.
int fileNums = files.length;
for (int i = 0; i < fileNums; i++) {
File file = (File) files[i];


// This will initiate ZipOutputStream to include the file
// with the input parameters
outputStream.putNextEntry(file, parameters);


// If this file is a directory, then no further processing is
// required
// and we close the entry (Please note that we do not close the
// outputstream yet)
if (file.isDirectory()) {
outputStream.closeEntry();
continue;
}


inputStream = new FileInputStream(file);
byte[] readBuff = new byte[4096];
int readLen = -1;
// Read the file content and write it to the OutputStream
while ((readLen = inputStream.read(readBuff)) != -1) {
outputStream.write(readBuff, 0, readLen);
}
// Once the content of the file is copied, this entry to the zip
// file
// needs to be closed. ZipOutputStream updates necessary header
// information
// for this file in this step
outputStream.closeEntry();
inputStream.close();
}
// ZipOutputStream now writes zip header information to the zip file
outputStream.finish();
} catch (Exception e) {
// log.error("文件压缩出错", e);
throw e;
} finally {
if (outputStream != null) {
try {
outputStream.close();
} catch (IOException e) {
// log.error("压缩文件输出错误", e);
throw e;
}
}
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException e) {
// log.error("压缩文件错误", e);
throw e;
}
}
}

}

}