压缩和解压缩

package com.itheima.gzip; import java.io.Closeable; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.zip.GZIPInputStream; import java.util.zip.GZIPOutputStream; public class GzipUtil { //压缩 /** * address.db ---->  address.zip * @param src 被压缩的文件路径 * @param target  压缩后放置的位置 */ public static void toZip(String src , String target){ FileInputStream fis = null; GZIPOutputStream gos  = null; try {  fis= new FileInputStream(src); //输出 FileOutputStream out = new FileOutputStream(target); gos = new GZIPOutputStream(out); byte [] buffer  = new byte[1024]; int len = 0 ; while((len = fis.read(buffer)) != -1){ gos.write(buffer, 0, len); } } catch (Exception e) { e.printStackTrace(); }finally{ close(fis); close(gos); } } /** * 解压缩  address.zip --- address.db * @param src * @param target */ public static void unZip(String src , String target){ FileInputStream fis = null; GZIPInputStream gos  = null; FileOutputStream out  = null; try {  fis= new FileInputStream(src); //输出 out= new FileOutputStream(target); gos = new GZIPInputStream(fis); byte [] buffer  = new byte[1024]; int len = 0 ; while((len = gos.read(buffer)) != -1){ out.write(buffer, 0, len); } } catch (Exception e) { e.printStackTrace(); }finally{ close(out); close(gos); } } private static void close(Closeable close){ try { close.close(); } catch (IOException e) { e.printStackTrace(); } } }