服务器技术:java:gzip服务器和js客户端

import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.zip.GZIPInputStream; import java.util.zip.GZIPOutputStream; public class GZIPUtils  {     public static final String GZIP_ENCODE_UTF_8 = "UTF-8";     public static byte[] compress(String str, String encoding) {         if (str == null || str.length() == 0) {             return null;         }         ByteArrayOutputStream out = new ByteArrayOutputStream();         GZIPOutputStream gzip;         try {             gzip = new GZIPOutputStream(out);             gzip.write(str.getBytes(encoding));             gzip.close();         } catch ( Exception e) {             e.printStackTrace();         }         return out.toByteArray();     }     public static byte[] compress(String str) throws IOException {         /str = URLEncoder.encode(str, GZIP_ENCODE_UTF_8);         return compress(str, GZIP_ENCODE_UTF_8);     }     public static byte[] uncompress(byte[] bytes) {         if (bytes == null || bytes.length == 0) {             return null;         }         ByteArrayOutputStream out = new ByteArrayOutputStream();         ByteArrayInputStream in = new ByteArrayInputStream(bytes);         try {             GZIPInputStream ungzip = new GZIPInputStream(in);             byte[] buffer = new byte[256];             int n;             while n = ungzip.read(buffer >= 0) {                 out.write(buffer, 0, n);             }         } catch (Exception e) {             e.printStackTrace();         }         return out.toByteArray();     }     public static String uncompressToString(byte[] bytes, String encoding) {         if (bytes == null || bytes.length == 0) {             return null;         }         ByteArrayOutputStream out = new ByteArrayOutputStream();         ByteArrayInputStream in = new ByteArrayInputStream(bytes);         try {             GZIPInputStream ungzip = new GZIPInputStream(in);             byte[] buffer = new byte[256];             int n;             while n = ungzip.read(buffer >= 0) {                 out.write(buffer, 0, n);             }             return out.toString(encoding);         } catch (Exception e) {             e.printStackTrace();         }         return null;     }     public static String uncompressToString(byte[] bytes) {         return uncompressToString(bytes, GZIP_ENCODE_UTF_8);     }     public static String toString(byte[] bytes) {         return org.apache.commons.codec.binary.Base64.encodeBase64String(bytes);     }     public static byte[] decodeToString(String bytes) {         return org.apache.commons.codec.binary.Base64.decodeBase64(bytes);     }     public static void main(String[] args) throws IOException {         /*String s = "{\"navigate\":\"POSLOGIN\",\"userInfo\":{\"sysDate\":1575540038000,\"userFlag\":\"Y\",\"orderType\":\"\",\"lastURL\":\"\",\"shopName\":\"安麗體驗廣場\",\"saleDate\":1575475200000,\"locale\":\"zh_TW\",\"orderChannel\":\"POS\",\"lastDateForMonth\":1577807999000,\"regionCode\":\"130\",\"staffName\":\"邱信展2\",\"logonPosFlag\":\"Y\",\"startTime\":1575540038000,\"integerFirstDateForMonth\":20191201,\"posSequence\":0,\"saleDateInt\":20191205,\"shopCode\":\"01\",\"firstDateForMonth\":1575129600000,\"cardHiddenFlag\":\"N\",\"preference\":{\"dateFormatInput\":\"yyyyMMdd\",\"currencyFormatD3\":\"#,##0.000\",\"currencyFormatD2\":\"#,##0.00\",\"dateFormat\":\"yyyy-MM-dd\",\"currencyFormatD0\":\"#,##0\",\"timeFormat\":\"HH:mm:ss\",\"dateAndTimeFormat\":\"MM-dd HH:mm\"},\"idHiddenFlag\":\"N\",\"sysDateInt\":20191205,\"privilegeInited\":false,\"staffNumber\":\"QIU02\",\"orderDivFlowList\":[],\"posCode\":\"T003\",\"inValidPrivHotKeyStrSet\":[\"A01\"],\"intSaleDateTW\":1191205,\"currencyCode\":\"NTD\",\"integerLastDateForMonth\":20191231}}";         System.out.println("字符串长度："+s.length());         System.out.println("字符长度byte："+   s.getBytes("UTF-8").length);         String cstr = GZIPUtils.toString( compress(s));         cstr = new String( compress(s));         System.out.println("byse64压缩后String：："+ cstr );         System.out.println("byse64压缩后ByteLength：："+ cstr.getBytes("UTF-8").length);         System.out.println("压缩后byte：："+compress(s).length);         System.out.println("解压后byte："+uncompress(compress(s)).length);         System.out.println("解压字符串后：："+uncompressToString(compress(s)));         System.out.println("解压字符串后：："+toString(compress(s))); */         } } ===================================================================== <img src="https://wiki.gddlh.com/ueditor/dialogs/attachment/fileTypeImages/icon_txt.gif"/><a style="font-size:12px; color:#0066cc;" href="https://wiki.gddlh.com/ueditor/php/upload/file/20200303/1583223414771695.html" title="pako.html">pako.html</a><img src="https://wiki.gddlh.com/ueditor/dialogs/attachment/fileTypeImages/icon_txt.gif"/><a style="font-size:12px; color:#0066cc;" href="https://wiki.gddlh.com/ueditor/php/upload/file/20200303/1583223414929887.js" title="pako.js">pako.js</a><!DOCTYPE html> <html> <head>   <meta charset="UTF-8">   <title>pako.js实现gzip的压缩和解压</title> </head> <body> <script type="text/javascript" src="pako.js"></script> <script > var b64Data   = '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'; var ticketData = '{"ed":"20170121 09:44:01","fs":[{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"003","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"005","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"004","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"007","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"008","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"026","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"033","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"034","oids":["0"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"035","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"037","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"038","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"041","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"042","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"047","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"046","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"048","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"051","oids":["1"]},{"usg":[1,1,1,1,1,1,1],"act":0,"fid":"053","oids":["4"]}],"qty":1,"sd":"20161021 09:44:01","cd":"72016102116762039687"}'; var han = "就是qwqw上来就发上来快点减肥蓝色的就疯了似的"; Output to console var ehan = zip(han); var s =  unzip(b64Data) ; console.log("unzipped:"); console.log(s); console.log("中午"); document.write(han+" "); document.write(s); var data = zip(ticketData); console.log("zipped:"); console.log(data); function unzip(b64Data){   var strData   = atob(b64Data);   Convert binary string to character-number array   var charData  = strData.split('').map(function(x){return x.charCodeAt(0);});   Turn number array into byte-array   var binData   = new Uint8Array(charData);   unzip   var data    = pako.inflate(binData);   Convert gunzipped byteArray back to ascii string:   strData   = String.fromCharCode.apply(null, new Uint16Array(data));   Convert gunzipped byteArray back to utf8 string:   strData = byteToUtf8String(data);   return strData; } function zip(str){   var binaryString = pako.gzip(str, { to: 'string' });   return btoa(binaryString); } function byteToUtf8String(arr) {     if(typeof arr === 'string') {         return arr;     }     var str = '',         _arr = arr;     for(var i = 0; i < _arr.length; i++) {         var one = _arr[i].toString(2),             v = one.match(/^1+?(?=0)/);         if(v && one.length == 8) {             var bytesLength = v[0].length;             var store = _arr[i].toString(2).slice(7 - bytesLength);             for(var st = 1; st < bytesLength; st++) {                 store += _arr[st + i].toString(2).slice(2);             }             str += String.fromCharCode(parseInt(store, 2));             i += bytesLength - 1;         } else {             str += String.fromCharCode(_arr[i]);         }     }     return str; } </script> ========= </body> </html>