Simple String Compression Functions

最新推荐文章于 2025-01-13 15:16:10 发布

mig3719

最新推荐文章于 2025-01-13 15:16:10 发布

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文章标签： string compression byte buffer

本文介绍了一种使用Java实现的字符串压缩与解压缩的方法。通过ZipOutputStream进行压缩，并利用ZipInputStream进行解压缩操作。文章提供了完整的代码示例，演示了如何将字符串压缩为字节数组以及如何将压缩后的数据还原成原始字符串。

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public static final byte[] compress(String str) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
ZipOutputStream zout = new ZipOutputStream(out);
zout.putNextEntry(new ZipEntry("0"));
zout.write(str.getBytes());
zout.closeEntry();
byte[] compressed = out.toByteArray();
zout.close();
return compressed;
}

public static final String decompress(byte[] compressed) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
ByteArrayInputStream in = new ByteArrayInputStream(compressed);
ZipInputStream zin = new ZipInputStream(in);
ZipEntry entry = zin.getNextEntry();
byte[] buffer = new byte[1024];
int offset = -1;
while((offset = zin.read(buffer)) != -1) {
out.write(buffer, 0, offset);
}
String decompressed = out.toString();
out.close();
zin.close();
return decompressed;
}

public static final void main(String[] args) {
String str = "Compress this string/r/n"
"Compress this string/r/n"
"Compress this string/r/n"
"Compress this string/r/n"
"Compress this string/r/n"
"Compress this string/r/n"
"Compress this string/r/n"
"Compress this string/r/n";
try {
byte[] compressed = compress(str);
int compressedSize = compressed.length;
String decompressed = decompress(compressed);
int decompressedSize = decompressed.getBytes().length;
System.out.println("Compressed Size = " compressedSize);
System.out.println("Decompressed Size = " + decompressedSize);
} catch(IOException e) {
e.printStackTrace();
}
}