JAVA对字符串的压缩与解压缩
import java.io.ByteArrayInputStream;import java.io.ByteArrayOutputStream;import java.io.IOException;import java.util.zip.GZIPInputStream;import java.util.zip.GZIPOutputStream;import java.util.zip.ZipEntry;import java.util.zip.ZipInputStream;import java.util.zip.ZipOutputStream;public class ZipUtils {/*** 使用gzip进行压缩 String gzip(String primStr) {if (primStr == null || primStr.length() == 0) {return primStr;}ByteArrayOutputStream out = new ByteArrayOutputStream();GZIPOutputStream gzip=null;try {gzip = new GZIPOutputStream(out);gzip.write(primStr.getBytes());} catch (IOException e) {e.printStackTrace();}finally{if(gzip!=null){try {gzip.close();} catch (IOException e) {e.printStackTrace();}}}return new sun.misc.BASE64Encoder().encode(out.toByteArray());}/**** <p>Description:使用gzip进行解压缩</p>* @param compressedStr* String gunzip(String compressedStr){if(compressedStr==null){return null;}ByteArrayOutputStream out= new ByteArrayOutputStream();ByteArrayInputStream in=null;GZIPInputStream ginzip=null;byte[] compressed=null;String decompressed = null;try {compressed = new sun.misc.BASE64Decoder().decodeBuffer(compressedStr);in=new ByteArrayInputStream(compressed);ginzip=new GZIPInputStream(in);byte[] buffer = new byte[1024];int offset = -1;while ((offset = ginzip.read(buffer)) != -1) {out.write(buffer, 0, offset);}decompressed=out.toString();} catch (IOException e) {e.printStackTrace();} finally {if (ginzip != null) {try {ginzip.close();} catch (IOException e) {}}if (in != null) {try {in.close();} catch (IOException e) {}}if (out != null) {try {out.close();} catch (IOException e) {}}}return decompressed;}/*** 使用zip进行压缩* @param str 压缩前的文本* @return 返回压缩后的文本 String zip(String str) {if (str == null)return null;byte[] compressed;ByteArrayOutputStream out = null;ZipOutputStream zout = null;String compressedStr = null;try {out = new ByteArrayOutputStream();zout = new ZipOutputStream(out);zout.putNextEntry(new ZipEntry(“0”));zout.write(str.getBytes());zout.closeEntry();compressed = out.toByteArray();compressedStr = new sun.misc.BASE64Encoder().encodeBuffer(compressed);} catch (IOException e) {compressed = null;} finally {if (zout != null) {try {zout.close();} catch (IOException e) {}}if (out != null) {try {out.close();} catch (IOException e) {}}}return compressedStr;}/*** 使用zip进行解压缩* @param compressed 压缩后的文本* @return 解压后的字符串 String unzip(String compressedStr) {if (compressedStr == null) {return null;}ByteArrayOutputStream out = null;ByteArrayInputStream in = null;ZipInputStream zin = null;String decompressed = null;try {byte[] compressed = new sun.misc.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();} catch (IOException e) {decompressed = null;} finally {if (zin != null) {try {zin.close();} catch (IOException e) {}}if (in != null) {try {in.close();} catch (IOException e) {}}if (out != null) {try {out.close();} catch (IOException e) {}}}return decompressed;}}
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，旅行还在继续，这个过程是艰难而又孤单的。
