[Java 常用类库]:StringCompress(字符串压缩)

[Java 常用类库]

StringCompress(字符串压缩)

方法说明：

1.compress(String):对字符串进行ZIP压缩饼返回字节数组

2.decompress(byte[]):将压缩的字节数组还原成字符串

用途：

保存到数据库BOLB中。

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
import java.util.zip.ZipOutputStream;

public class StringCompress {
	public static final byte[] compress(String paramString) {
		if (paramString == null)
			return null;
		ByteArrayOutputStream byteArrayOutputStream = null;
		ZipOutputStream zipOutputStream = null;
		byte[] arrayOfByte;
		try {
			byteArrayOutputStream = new ByteArrayOutputStream();
			zipOutputStream = new ZipOutputStream(byteArrayOutputStream);
			zipOutputStream.putNextEntry(new ZipEntry("0"));
			zipOutputStream.write(paramString.getBytes());
			zipOutputStream.closeEntry();
			arrayOfByte = byteArrayOutputStream.toByteArray();
		} catch (IOException localIOException5) {
			arrayOfByte = null;
		} finally {
			if (zipOutputStream != null)
				try {
					zipOutputStream.close();
				} catch (IOException localIOException6) {
			}
			if (byteArrayOutputStream != null)
				try {
					byteArrayOutputStream.close();
				} catch (IOException localIOException7) {
			}
		}
		return arrayOfByte;
	}

	@SuppressWarnings("unused")
	public static final String decompress(byte[] paramArrayOfByte) {
		if (paramArrayOfByte == null)
			return null;
		ByteArrayOutputStream byteArrayOutputStream = null;
		ByteArrayInputStream byteArrayInputStream = null;
		ZipInputStream zipInputStream = null;
		String str;
		try {
			byteArrayOutputStream = new ByteArrayOutputStream();
			byteArrayInputStream = new ByteArrayInputStream(paramArrayOfByte);
			zipInputStream = new ZipInputStream(byteArrayInputStream);
			ZipEntry localZipEntry = zipInputStream.getNextEntry();
			byte[] arrayOfByte = new byte[1024];
			int i = -1;
			while ((i = zipInputStream.read(arrayOfByte)) != -1)
				byteArrayOutputStream.write(arrayOfByte, 0, i);
			str = byteArrayOutputStream.toString();
		} catch (IOException localIOException7) {
			str = null;
		} finally {
			if (zipInputStream != null)
				try {
					zipInputStream.close();
				} catch (IOException localIOException8) {
				}
			if (byteArrayInputStream != null)
				try {
					byteArrayInputStream.close();
				} catch (IOException localIOException9) {
				}
			if (byteArrayOutputStream != null)
				try {
					byteArrayOutputStream.close();
				} catch (IOException localIOException10) {
			}
		}
		return str;
	}
}