PHP gzcompress 压缩，java实现gzuncompress

1、PHP服务压缩数据

将字符串urlencode（因为压缩之后的字符串会有非显示字符）：

x%DAKLJNIMK%CF%C8%CC%CA%CE%01%00%1E%B8%04%CF

$str = "abcdefghijkl";
$str = urlencode(gzcompress($str, 9));//为了字符串字符可见

2、java解压

由于PHP gzcompress使用ZLIB压缩，因此java选择对应的压缩算法解压。

有一点是特别要注意的，一定要设置字符集，由于系统一般是UTF-8编码。

public static void main(String[] args) throws IOException {
String tmp = "x%DAKLJNIMK%CF%C8%CC%CA%CE%01%00%1E%B8%04%CF";
String decodeTmp = URLDecoder.decode(tmp,"ISO-8859-1");
System.out.println(decompress(decodeTmp));
}
public static String decompress(String data) throws UnsupportedEncodingException {
return decompress(data,"ISO-8859-1");
}
public static String decompress(String data, String charset) throws UnsupportedEncodingException {

byte[] bytes = data.getBytes(charset);

byte[] output = new byte[0];

Inflater decompresser = new Inflater();
decompresser.reset();
decompresser.setInput(bytes);

ByteArrayOutputStream o = new ByteArrayOutputStream(bytes.length);
try {
byte[] buf = new byte[1024];
while (!decompresser.finished()) {
int i = decompresser.inflate(buf);
o.write(buf, 0, i);
}
output = o.toByteArray();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
o.close();
} catch (IOException e) {
e.printStackTrace();
}
}
decompresser.end();
return new String(output);
}