對網頁表單post提交的數據進行解碼。一般編碼是base64或application/x-www-form-urlencoded類型，本文主要是針對這個實現。當然有很多是js加密的，就只能看怎么破解js中的加密算法了。還有如ContentType文件類型是text/octet純二進制文件的，不知如何解碼。

一般解碼代碼如下，僅供參考。

public static void main(String[] args) throws Exception {String line="ifacelog.iqiyi.com|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";String[] strPosts=line.split("\\|");//獲取行，并按照|分隔符提取String domain=strPosts[0];//domian String postdata=strPosts[1];//contentSystem.out.println(postdata);String lastStr=postdata.substring(postdata.length()-1);//獲取最后一位if(lastStr.equals("=")){ //符合base64編碼特征，用base64解碼byte[] bEncode=postdata.getBytes();//獲取post串的字節byte[] bDecode= it.sauronsoftware.base64.Base64.decode(bEncode);//用base64解碼postdata=new String(bDecode);System.out.println(postdata);}if(postdata.contains("%") || postdata.contains("+")){//原串和經過base64解碼后的串中合application/x-www-form-urlencoded類型 //支持text/plain類型String charSet="UTF-8";//默認try{//獲取域名，返回服務器編碼方式ContentType URL u = new URL("http://"+domain); URLConnection uc = u.openConnection(); String type = uc.getContentType();if(type!=null) {int i=type.indexOf("=");if(i!=-1) charSet=type.substring(i+1, type.length());} System.out.println(charSet);String content=URLDecoder.decode(postdata,charSet);System.out.println(content);}catch(IOException e){e.printStackTrace();}} }
執行后結果：

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 vv=0%092016-07-26+00%3A04%3A00%09352746066674252%09GPhone%094.4.2%091920*1080%09SM-N900%091%091189880031%0969842642483add0a63503306d63f0443%097.3%09513140900%0913%091%0910%09%090%090%091%091%092153%091%0972748%0916%090%091%09200%090%09113.07443%2C22.868384%09200%09513140900%090%0911%09%09a4344abe6e56a9280beb0ed5ab574e76%09e77b8799274352cf%09%091%090%091%0974217%090%091%09613A01E6636F51765CC7C8A63937F5FC%09%26upderid%3D%09%090%09%09%09%09qy_home%2CR%3A204835112%3A6%2C100%2C+%2C1%09%09%090%090%090%090%09-1%09%7B%22rtype%22%3A%221%22%2C%22pop%22%3A%221%22%2C%22pos%22%3A%220%22%7D%09%09vb7rnha1ck5kzotd%090%09cn_s utf-8 vv=0 2016-07-26 00:04:00 352746066674252 GPhone 4.4.2 1920*1080 SM-N900 1 1189880031 69842642483add0a63503306d63f0443 7.3 513140900 13 1 10 0 0 1 1 2153 1 72748 16 0 1 200 0 113.07443,22.868384 200 513140900 0 11 a4344abe6e56a9280beb0ed5ab574e76 e77b8799274352cf 1 0 1 74217 0 1 613A01E6636F51765CC7C8A63937F5FC &upderid= 0 qy_home,R:204835112:6,100, ,1 0 0 0 0 -1 {"rtype":"1","pop":"1","pos":"0"} vb7rnha1ck5kzotd 0 cn_s

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