Java中ZIP与Gzip的压缩与解压处理，其中有Base64处理

1、ZIP压缩与解压

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;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;import com.fusion.areain.common.Constants;/** *  * 对字符串进行加解密和加解压 * @author *** * */@SuppressWarnings("restriction")public class ZipUtil {private static Logger log = LoggerFactory.getLogger(ZipUtil.class);/** * 将字符串压缩后Base64 * @param primStr 待加压加密函数 * @return */public static String zipString(String primStr) {if (primStr == null || primStr.length() == 0) {return primStr;}ByteArrayOutputStream out = null;  ZipOutputStream zout = null;  try{  out = new ByteArrayOutputStream();  zout = new ZipOutputStream(out);  zout.putNextEntry(new ZipEntry("0"));zout.write(primStr.getBytes(Constants.transfer_charset));  zout.closeEntry();return new BASE64Encoder().encode(out.toByteArray());} catch (IOException e) {log.error("对字符串进行加压加密操作失败：", e);return null;} finally {if (zout != null) {try {zout.close();} catch (IOException e) {log.error("对字符串进行加压加密操作，关闭zip操作流失败：", e);}}}}/** * 将压缩并Base64后的字符串进行解密解压 * @param compressedStr 待解密解压字符串 * @return */public static final String unzipString(String compressedStr) {if (compressedStr == null) {return null;}ByteArrayOutputStream out = null;ByteArrayInputStream in = null;ZipInputStream zin = null;String decompressed = null;try {byte[] compressed = new BASE64Decoder().decodeBuffer(compressedStr);out = new ByteArrayOutputStream();in = new ByteArrayInputStream(compressed);zin = new ZipInputStream(in);zin.getNextEntry();byte[] buffer = new byte[1024];int offset = -1;while((offset = zin.read(buffer)) != -1) {out.write(buffer, 0, offset);}decompressed = out.toString(Constants.transfer_charset);} catch (IOException e) {log.error("对字符串进行解密解压操作失败：", e);decompressed = null;} finally {if (zin != null) {try {zin.close();} catch (IOException e) {log.error("对字符串进行解密解压操作，关闭压缩流失败：", e);}}if (in != null) {try {in.close();} catch (IOException e) {log.error("对字符串进行解密解压操作，关闭输入流失败：", e);}}if (out != null) {try {out.close();} catch (IOException e) {log.error("对字符串进行解密解压操作，关闭输出流失败：", e);}}}return decompressed;}}

使用ZIP进行处理是对于JAVA本身可以互相处理，但是Java压缩的结果C#不能解压，后来修改为GZIP就可以了。

2、GZIP压缩与解压

import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.util.zip.GZIPInputStream;import java.util.zip.GZIPOutputStream;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import sun.misc.BASE64Decoder;import sun.misc.BASE64Encoder;import com.fusion.areain.common.Constants;/** *  * 对字符串进行加解密和加解压 * @author wujh * */@SuppressWarnings("restriction")public class GZipUtil {private static Logger log = LoggerFactory.getLogger(GZipUtil.class);/** * 将字符串压缩后Base64 * @param primStr 待加压加密函数 * @return */public static String gzipString(String primStr) {if (primStr == null || primStr.length() == 0) {return primStr;}ByteArrayOutputStream out = null;  GZIPOutputStream gout = null;  try{  out = new ByteArrayOutputStream();  gout = new GZIPOutputStream(out);gout.write(primStr.getBytes(Constants.transfer_charset));  gout.flush();} catch (IOException e) {log.error("对字符串进行加压加密操作失败：", e);return null;} finally {if (gout != null) {try {gout.close();} catch (IOException e) {log.error("对字符串进行加压加密操作，关闭gzip操作流失败：", e);}}}return new BASE64Encoder().encode(out.toByteArray());}/** * 将压缩并Base64后的字符串进行解密解压 * @param compressedStr 待解密解压字符串 * @return */public static final String ungzipString(String compressedStr) {if (compressedStr == null) {return null;}ByteArrayOutputStream out = null;ByteArrayInputStream in = null;GZIPInputStream gin = null;String decompressed = null;try {byte[] compressed = new BASE64Decoder().decodeBuffer(compressedStr);out = new ByteArrayOutputStream();in = new ByteArrayInputStream(compressed);gin = new GZIPInputStream(in);byte[] buffer = new byte[1024];int offset = -1;while((offset = gin.read(buffer)) != -1) {out.write(buffer, 0, offset);}decompressed = out.toString(Constants.transfer_charset);} catch (IOException e) {log.error("对字符串进行解密解压操作失败：", e);decompressed = null;} finally {if (gin != null) {try {gin.close();} catch (IOException e) {log.error("对字符串进行解密解压操作，关闭压缩流失败：", e);}}if (in != null) {try {in.close();} catch (IOException e) {log.error("对字符串进行解密解压操作，关闭输入流失败：", e);}}if (out != null) {try {out.close();} catch (IOException e) {log.error("对字符串进行解密解压操作，关闭输出流失败：", e);}}}return decompressed;}public static void main(String[] args) {System.out.println(ungzipString(gzipString("1234567")));}}

使用GZIP压缩的时候需要注意，

<strong style="background-color: rgb(204, 102, 0);">return new BASE64Encoder().encode(out.toByteArray());需要放在out对象关闭之后，不然解压时会报错。</strong>