import com.jcraft.jzlib.ZStream; //导入依赖的package包/类
/**
 * Creates an instance of the ZLib class.
 * 
 * @param compressionLevel the level of compression that should be used. One of
 * <tt>COMPRESSION_MAX</tt>, <tt>COMPRESSION_MIN</tt>,
 * <tt>COMPRESSION_NONE</tt> or <tt>COMPRESSION_DEFAULT</tt>
 * @param mode the mode in which the instance will operate. Can be either
 * of <tt>MODE_DEFLATER</tt> or <tt>MODE_INFLATER</tt>
 * @throws IllegalArgumentException if the mode is incorrect
 */
public Zlib(int compressionLevel, int mode) {
    switch (compressionLevel) {
    case COMPRESSION_MAX:
    case COMPRESSION_MIN:
    case COMPRESSION_NONE:
    case COMPRESSION_DEFAULT:
        this.compressionLevel = compressionLevel;
        break;
    default:
        throw new IllegalArgumentException("invalid compression level specified");
    }

    // create a new instance of ZStream. This will be done only once.
    zStream = new ZStream();

    switch (mode) {
    case MODE_DEFLATER:
        zStream.deflateInit(this.compressionLevel);
        break;
    case MODE_INFLATER:
        zStream.inflateInit();
        break;
    default:
        throw new IllegalArgumentException("invalid mode specified");
    }
    this.mode = mode;
}
 

import com.jcraft.jzlib.ZStream; //导入依赖的package包/类
public Zlib() {
	deflate = new ZStream();
	inflate = new ZStream();

	deflate.deflateInit(LEVEL);
	inflate.inflateInit();

	deflate_tmpbuf = new byte[DEFAULT_BUF_SIZE];
	inflate_tmpbuf = new byte[DEFAULT_BUF_SIZE];
	inflated_buf = new byte[DEFAULT_BUF_SIZE];
}
 

import com.jcraft.jzlib.ZStream; //导入依赖的package包/类
public ZlibCompressor() {
    mInflateStream = new ZStream();
    mInflateStream.inflateInit();
    mDeflateStream = new ZStream();
    mDeflateStream.deflateInit(9);
    mBuffer = new byte[BUFFER_SIZE];
}
 

import com.jcraft.jzlib.ZStream; //导入依赖的package包/类
public ZLibCompression() {
	stream = new ZStream();
}