java实现linux中gzip压缩解压缩算法：byte[]字节数组，文件，字符串，数据流的压缩解压缩

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全栈工程师开发手册（作者：栾鹏）

java教程全解

java实现gzip压缩解压缩byte[]字节数组，文件，字符串。

测试代码

public static void main(String[] args) {        try {            //测试字符串            String inputStr = "zlex@zlex.org,snowolf@zlex.org,zlex.snowolf@zlex.org";              System.err.println("原文:\t" + inputStr);              byte[] input = inputStr.getBytes();              System.err.println("长度:\t" + input.length);              byte[] data = GZipUtils.compress(input);              System.err.println("压缩后:\t");              System.err.println("长度:\t" + data.length);              byte[] output = GZipUtils.decompress(data);              String outputStr = new String(output);              System.err.println("解压缩后:\t" + outputStr);              System.err.println("长度:\t" + output.length);              //测试文件            FileOutputStream fos = new FileOutputStream("test.txt");              fos.write(inputStr.getBytes());              fos.flush();              fos.close();              GZipUtils.compress("test.txt", false);              GZipUtils.decompress("test.txt.gz", false);              File file = new File("test.txt");              FileInputStream fis = new FileInputStream(file);              DataInputStream dis = new DataInputStream(fis);              byte[] data1 = new byte[(int) file.length()];              dis.readFully(data1);              fis.close();              outputStr = new String(data1);              System.err.println("解压缩后:\t" + outputStr);          } catch (Exception e) {            e.printStackTrace();        }    }

gzip压缩解压缩工具类的实现

package com.lp.app.io;import java.io.ByteArrayInputStream;  import java.io.ByteArrayOutputStream;  import java.io.DataInputStream;import java.io.File;  import java.io.FileInputStream;  import java.io.FileOutputStream;  import java.io.InputStream;  import java.io.OutputStream;  import java.util.zip.GZIPInputStream;  import java.util.zip.GZIPOutputStream;  //GZIP压缩解压缩工具 public abstract class GZipUtils {      //数据压缩     public static byte[] compress(byte[] data) throws Exception {          ByteArrayInputStream bais = new ByteArrayInputStream(data);          ByteArrayOutputStream baos = new ByteArrayOutputStream();          // 压缩          compress(bais, baos);          byte[] output = baos.toByteArray();          baos.flush();          baos.close();          bais.close();          return output;      }      //文件压缩     public static void compress(File file) throws Exception {          compress(file, true);      }      //文件压缩 是否删除原始文件     public static void compress(File file, boolean delete) throws Exception {          FileInputStream fis = new FileInputStream(file);          FileOutputStream fos = new FileOutputStream(file.getPath() + ".gz");          compress(fis, fos);          fis.close();          fos.flush();          fos.close();          if (delete) {              file.delete();          }      }      //数据压缩     public static void compress(InputStream is, OutputStream os)  throws Exception {          GZIPOutputStream gos = new GZIPOutputStream(os);          int count;          byte data[] = new byte[1024];          while ((count = is.read(data, 0, 1024)) != -1) {              gos.write(data, 0, count);          }          gos.finish();          gos.flush();          gos.close();      }      //文件压缩  默认删除源文件    public static void compress(String path) throws Exception {          compress(path, true);      }      //文件压缩 是否删除原始文件     public static void compress(String path, boolean delete) throws Exception {          File file = new File(path);          compress(file, delete);      }      //数据解压缩     public static byte[] decompress(byte[] data) throws Exception {          ByteArrayInputStream bais = new ByteArrayInputStream(data);          ByteArrayOutputStream baos = new ByteArrayOutputStream();          // 解压缩          decompress(bais, baos);          data = baos.toByteArray();          baos.flush();          baos.close();          bais.close();          return data;      }      //文件解压缩     public static void decompress(File file) throws Exception {          decompress(file, true);      }      //文件解压缩  是否删除原始文件     public static void decompress(File file, boolean delete) throws Exception {          FileInputStream fis = new FileInputStream(file);          FileOutputStream fos = new FileOutputStream(file.getPath().replace(".gz",  ""));          decompress(fis, fos);          fis.close();          fos.flush();          fos.close();          if (delete) {              file.delete();          }      }      //数据解压缩     public static void decompress(InputStream is, OutputStream os)  throws Exception {          GZIPInputStream gis = new GZIPInputStream(is);          int count;          byte data[] = new byte[1024];          while ((count = gis.read(data, 0, 1024)) != -1) {              os.write(data, 0, count);          }          gis.close();      }      //文件解压缩 ,默认删除源文件    public static void decompress(String path) throws Exception {          decompress(path, true);      }      //文件解压缩   是否删除原始文件     public static void decompress(String path, boolean delete) throws Exception {          File file = new File(path);          decompress(file, delete);      }  }

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