如何用java创建一个加密的压缩包

如何用java创建一个加密的压缩包

下面的示例代码演示如何创建zip压缩包。
首先需要由需要压缩的文件创建一个InputStream对象，然后读取文件内容写入到ZipOutputStream中。
ZipOutputStream类接受FileOutputStream作为参数。创建号ZipOutputStream对象后需要创建一个zip entry，然后写入。

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;


public class Main {



public void createZipFile() {

try {
String inputFileName = "test.txt";
String zipFileName = "compressed.zip";

//Create input and output streams
FileInputStream inStream = new FileInputStream(inputFileName);
ZipOutputStream outStream = new ZipOutputStream(new FileOutputStream(zipFileName));

// Add a zip entry to the output stream
outStream.putNextEntry(new ZipEntry(inputFileName));

byte[] buffer = new byte[1024];
int bytesRead;

//Each chunk of data read from the input stream
//is written to the output stream
while ((bytesRead = inStream.read(buffer)) > 0) {
outStream.write(buffer, 0, bytesRead);
}

//Close zip entry and file streams
outStream.closeEntry();

outStream.close();
inStream.close();

} catch (IOException ex) {
ex.printStackTrace();
}
}


public static void main(String[] args) {
new Main().createZipFile();
}

你说的是jar包吧？jar包要想在eclipse中打开，首先要引入这个包，然后才能看。