{"id":180,"date":"2005-06-22T13:00:00","date_gmt":"2005-06-22T13:00:00","guid":{"rendered":"https:\/\/out.cat\/?p=176"},"modified":"2005-06-22T13:00:00","modified_gmt":"2005-06-22T13:00:00","slug":"%e7%94%a8java%e5%ae%9e%e7%8e%b0%e6%96%ad%e7%82%b9%e7%bb%ad%e4%bc%a0","status":"publish","type":"post","link":"https:\/\/out.cat\/?p=180","title":{"rendered":"\u7528Java\u5b9e\u73b0\u65ad\u70b9\u7eed\u4f20"},"content":{"rendered":"

(\u4e00)\u65ad\u70b9\u7eed\u4f20\u7684\u539f\u7406
\n\u5176\u5b9e\u65ad\u70b9\u7eed\u4f20\u7684\u539f\u7406\u5f88\u7b80\u5355\uff0c\u5c31\u662f\u5728Http\u7684\u8bf7\u6c42\u4e0a\u548c\u4e00\u822c\u7684\u4e0b\u8f7d\u6709\u6240\u4e0d\u540c\u800c\u5df2\u3002
\n\u6253\u4e2a\u6bd4\u65b9\uff0c\u6d4f\u89c8\u5668\u8bf7\u6c42\u670d\u52a1\u5668\u4e0a\u7684\u4e00\u4e2a\u6587\u65f6\uff0c\u6240\u53d1\u51fa\u7684\u8bf7\u6c42\u5982\u4e0b\uff1a
\n\u5047\u8bbe\u670d\u52a1\u5668\u57df\u540d\u4e3awwww.sjtu.edu.cn\uff0c\u6587\u4ef6\u540d\u4e3adown.zip\u3002
\nGET \/down.zip HTTP\/1.1
\nAccept: image\/gif, image\/x-xbitmap, image\/jpeg, image\/pjpeg, application\/vnd.ms-
\nexcel, application\/msword, application\/vnd.ms-powerpoint, *\/*
\nAccept-Language: zh-cn
\nAccept-Encoding: gzip, deflate
\nUser-Agent: Mozilla\/4.0 (compatible; MSIE 5.01; Windows NT 5.0)
\nConnection: Keep-Alive
\n\u670d\u52a1\u5668\u6536\u5230\u8bf7\u6c42\u540e\uff0c\u6309\u8981\u6c42\u5bfb\u627e\u8bf7\u6c42\u7684\u6587\u4ef6\uff0c\u63d0\u53d6\u6587\u4ef6\u7684\u4fe1\u606f\uff0c\u7136\u540e\u8fd4\u56de\u7ed9\u6d4f\u89c8\u5668\uff0c\u8fd4\u56de\u4fe1\u606f\u5982\u4e0b\uff1a
\n200
\nContent-Length=106786028
\nAccept-Ranges=bytes
\nDate=Mon, 30 Apr 2001 12:56:11 GMT
\nETag=W\/”02ca57e173c11:95b”
\nContent-Type=application\/octet-stream
\nServer=Microsoft-IIS\/5.0
\nLast-Modified=Mon, 30 Apr 2001 12:56:11 GMT
\n\u6240\u8c13\u65ad\u70b9\u7eed\u4f20\uff0c\u4e5f\u5c31\u662f\u8981\u4ece\u6587\u4ef6\u5df2\u7ecf\u4e0b\u8f7d\u7684\u5730\u65b9\u5f00\u59cb\u7ee7\u7eed\u4e0b\u8f7d\u3002\u6240\u4ee5\u5728\u5ba2\u6237\u7aef\u6d4f\u89c8\u5668\u4f20\u7ed9
\nWeb\u670d\u52a1\u5668\u7684\u65f6\u5019\u8981\u591a\u52a0\u4e00\u6761\u4fe1\u606f–\u4ece\u54ea\u91cc\u5f00\u59cb\u3002
\n\u4e0b\u9762\u662f\u7528\u81ea\u5df1\u7f16\u7684\u4e00\u4e2a”\u6d4f\u89c8\u5668”\u6765\u4f20\u9012\u8bf7\u6c42\u4fe1\u606f\u7ed9Web\u670d\u52a1\u5668\uff0c\u8981\u6c42\u4ece2000070\u5b57\u8282\u5f00\u59cb\u3002
\nGET \/down.zip HTTP\/1.0
\nUser-Agent: NetFox
\nRANGE: bytes=2000070-
\nAccept: text\/html, image\/gif, image\/jpeg, *; q=.2, *\/*; q=.2
\n\u4ed4\u7ec6\u770b\u4e00\u4e0b\u5c31\u4f1a\u53d1\u73b0\u591a\u4e86\u4e00\u884cRANGE: bytes=2000070-
\n\u8fd9\u4e00\u884c\u7684\u610f\u601d\u5c31\u662f\u544a\u8bc9\u670d\u52a1\u5668down.zip\u8fd9\u4e2a\u6587\u4ef6\u4ece2000070\u5b57\u8282\u5f00\u59cb\u4f20\uff0c\u524d\u9762\u7684\u5b57\u8282\u4e0d\u7528\u4f20\u4e86\u3002
\n\u670d\u52a1\u5668\u6536\u5230\u8fd9\u4e2a\u8bf7\u6c42\u4ee5\u540e\uff0c\u8fd4\u56de\u7684\u4fe1\u606f\u5982\u4e0b\uff1a
\n206
\nContent-Length=106786028
\nContent-Range=bytes 2000070-106786027\/106786028
\nDate=Mon, 30 Apr 2001 12:55:20 GMT
\nETag=W\/”02ca57e173c11:95b”
\nContent-Type=application\/octet-stream
\nServer=Microsoft-IIS\/5.0
\nLast-Modified=Mon, 30 Apr 2001 12:55:20 GMT
\n\u548c\u524d\u9762\u670d\u52a1\u5668\u8fd4\u56de\u7684\u4fe1\u606f\u6bd4\u8f83\u4e00\u4e0b\uff0c\u5c31\u4f1a\u53d1\u73b0\u589e\u52a0\u4e86\u4e00\u884c\uff1a
\nContent-Range=bytes 2000070-106786027\/106786028
\n\u8fd4\u56de\u7684\u4ee3\u7801\u4e5f\u6539\u4e3a206\u4e86\uff0c\u800c\u4e0d\u518d\u662f200\u4e86\u3002
\n\u77e5\u9053\u4e86\u4ee5\u4e0a\u539f\u7406\uff0c\u5c31\u53ef\u4ee5\u8fdb\u884c\u65ad\u70b9\u7eed\u4f20\u7684\u7f16\u7a0b\u4e86\u3002
\n(\u4e8c)Java\u5b9e\u73b0\u65ad\u70b9\u7eed\u4f20\u7684\u5173\u952e\u51e0\u70b9
\n(1)\u7528\u4ec0\u4e48\u65b9\u6cd5\u5b9e\u73b0\u63d0\u4ea4RANGE: bytes=2000070-\u3002
\n\u5f53\u7136\u7528\u6700\u539f\u59cb\u7684Socket\u662f\u80af\u5b9a\u80fd\u5b8c\u6210\u7684\uff0c\u4e0d\u8fc7\u90a3\u6837\u592a\u8d39\u4e8b\u4e86\uff0c\u5176\u5b9eJava\u7684net\u5305\u4e2d\u63d0\u4f9b\u4e86\u8fd9\u79cd\u529f\u80fd\u3002\u4ee3\u7801\u5982\u4e0b\uff1a
\nURL url = new URL(“http:\/\/www.sjtu.edu.cn\/down.zip”);
\nHttpURLConnection httpConnection = (HttpURLConnection)url.openConnection
\n();
\n\/\/\u8bbe\u7f6eUser-Agent
\nhttpConnection.setRequestProperty(“User-Agent”,”NetFox”);
\n\/\/\u8bbe\u7f6e\u65ad\u70b9\u7eed\u4f20\u7684\u5f00\u59cb\u4f4d\u7f6e
\nhttpConnection.setRequestProperty(“RANGE”,”bytes=2000070″);
\n\/\/\u83b7\u5f97\u8f93\u5165\u6d41
\nInputStream input = httpConnection.getInputStream();
\n\u4ece\u8f93\u5165\u6d41\u4e2d\u53d6\u51fa\u7684\u5b57\u8282\u6d41\u5c31\u662fdown.zip\u6587\u4ef6\u4ece2000070\u5f00\u59cb\u7684\u5b57\u8282\u6d41\u3002
\n\u5927\u5bb6\u770b\uff0c\u5176\u5b9e\u65ad\u70b9\u7eed\u4f20\u7528Java\u5b9e\u73b0\u8d77\u6765\u8fd8\u662f\u5f88\u7b80\u5355\u7684\u5427\u3002
\n\u63a5\u4e0b\u6765\u8981\u505a\u7684\u4e8b\u5c31\u662f\u600e\u4e48\u4fdd\u5b58\u83b7\u5f97\u7684\u6d41\u5230\u6587\u4ef6\u4e2d\u53bb\u4e86\u3002
\n\u4fdd\u5b58\u6587\u4ef6\u91c7\u7528\u7684\u65b9\u6cd5\u3002
\n\u6211\u91c7\u7528\u7684\u662fIO\u5305\u4e2d\u7684RandAccessFile\u7c7b\u3002
\n\u64cd\u4f5c\u76f8\u5f53\u7b80\u5355\uff0c\u5047\u8bbe\u4ece2000070\u5904\u5f00\u59cb\u4fdd\u5b58\u6587\u4ef6\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a
\nRandomAccess oSavedFile = new RandomAccessFile(“down.zip”,”rw”);
\nlong nPos = 2000070;
\n\/\/\u5b9a\u4f4d\u6587\u4ef6\u6307\u9488\u5230nPos\u4f4d\u7f6e
\noSavedFile.seek(nPos);
\nbyte[] b = new byte[1024];
\nint nRead;
\n\/\/\u4ece\u8f93\u5165\u6d41\u4e2d\u8bfb\u5165\u5b57\u8282\u6d41\uff0c\u7136\u540e\u5199\u5230\u6587\u4ef6\u4e2d
\nwhile((nRead=input.read(b,0,1024)) > 0)
\n{
\noSavedFile.write(b,0,nRead);
\n}
\n\u600e\u4e48\u6837\uff0c\u4e5f\u5f88\u7b80\u5355\u5427\u3002
\n\u63a5\u4e0b\u6765\u8981\u505a\u7684\u5c31\u662f\u6574\u5408\u6210\u4e00\u4e2a\u5b8c\u6574\u7684\u7a0b\u5e8f\u4e86\u3002\u5305\u62ec\u4e00\u7cfb\u5217\u7684\u7ebf\u7a0b\u63a7\u5236\u7b49\u7b49\u3002
\n(\u4e09)\u65ad\u70b9\u7eed\u4f20\u5185\u6838\u7684\u5b9e\u73b0
\n\u4e3b\u8981\u7528\u4e866\u4e2a\u7c7b\uff0c\u5305\u62ec\u4e00\u4e2a\u6d4b\u8bd5\u7c7b\u3002
\nSiteFileFetch.java\u8d1f\u8d23\u6574\u4e2a\u6587\u4ef6\u7684\u6293\u53d6\uff0c\u63a7\u5236\u5185\u90e8\u7ebf\u7a0b(FileSplitterFetch\u7c7b)\u3002
\nFileSplitterFetch.java\u8d1f\u8d23\u90e8\u5206\u6587\u4ef6\u7684\u6293\u53d6\u3002
\nFileAccess.java\u8d1f\u8d23\u6587\u4ef6\u7684\u5b58\u50a8\u3002
\nSiteInfoBean.java\u8981\u6293\u53d6\u7684\u6587\u4ef6\u7684\u4fe1\u606f\uff0c\u5982\u6587\u4ef6\u4fdd\u5b58\u7684\u76ee\u5f55\uff0c\u540d\u5b57\uff0c\u6293\u53d6\u6587\u4ef6\u7684URL\u7b49\u3002
\nUtility.java\u5de5\u5177\u7c7b\uff0c\u653e\u4e00\u4e9b\u7b80\u5355\u7684\u65b9\u6cd5\u3002
\nTestMethod.java\u6d4b\u8bd5\u7c7b\u3002
\n\u4e0b\u9762\u662f\u6e90\u7a0b\u5e8f\uff1a
\n\/*
\n**SiteFileFetch.java
\n*\/
\npackage NetFox;
\nimport java.io.*;
\nimport java.net.*;
\npublic class SiteFileFetch extends Thread {
\nSiteInfoBean siteInfoBean = null; \/\/\u6587\u4ef6\u4fe1\u606fBean
\nlong[] nStartPos; \/\/\u5f00\u59cb\u4f4d\u7f6e
\nlong[] nEndPos; \/\/\u7ed3\u675f\u4f4d\u7f6e
\nFileSplitterFetch[] fileSplitterFetch; \/\/\u5b50\u7ebf\u7a0b\u5bf9\u8c61
\nlong nFileLength; \/\/\u6587\u4ef6\u957f\u5ea6
\nboolean bFirst = true; \/\/\u662f\u5426\u7b2c\u4e00\u6b21\u53d6\u6587\u4ef6
\nboolean bStop = false; \/\/\u505c\u6b62\u6807\u5fd7
\nFile tmpFile; \/\/\u6587\u4ef6\u4e0b\u8f7d\u7684\u4e34\u65f6\u4fe1\u606f
\nDataOutputStream output; \/\/\u8f93\u51fa\u5230\u6587\u4ef6\u7684\u8f93\u51fa\u6d41
\npublic SiteFileFetch(SiteInfoBean bean) throws IOException
\n{
\nsiteInfoBean = bean;
\n\/\/tmpFile = File.createTempFile (“zhong”,”1111″,new File(bean.getSFilePath()));
\ntmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+”.info”);
\nif(tmpFile.exists ())
\n{
\nbFirst = false;
\nread_nPos();
\n}
\nelse
\n{
\nnStartPos = new long[bean.getNSplitter()];
\nnEndPos = new long[bean.getNSplitter()];
\n}
\n}
\npublic void run()
\n{
\n\/\/\u83b7\u5f97\u6587\u4ef6\u957f\u5ea6
\n\/\/\u5206\u5272\u6587\u4ef6
\n\/\/\u5b9e\u4f8bFileSplitterFetch
\n\/\/\u542f\u52a8FileSplitterFetch\u7ebf\u7a0b
\n\/\/\u7b49\u5f85\u5b50\u7ebf\u7a0b\u8fd4\u56de
\ntry{
\nif(bFirst)
\n{
\nnFileLength = getFileSize();
\nif(nFileLength == -1)
\n{
\nSystem.err.println(“File Length is not known!”);
\n}
\nelse if(nFileLength == -2)
\n{
\nSystem.err.println(“File is not access!”);
\n}
\nelse
\n{
\nfor(int i=0;i4)
\n\/\/ siteStop();
\n}
\nSystem.err.println(“\u6587\u4ef6\u4e0b\u8f7d\u7ed3\u675f\uff01”);
\n}
\ncatch(Exception e){e.printStackTrace ();}
\n}
\n\/\/\u83b7\u5f97\u6587\u4ef6\u957f\u5ea6
\npublic long getFileSize()
\n{
\nint nFileLength = -1;
\ntry{
\nURL url = new URL(siteInfoBean.getSSiteURL());
\nHttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
\nhttpConnection.setRequestProperty(“User-Agent”,”NetFox”);
\nint responseCode=httpConnection.getResponseCode();
\nif(responseCode>=400)
\n{
\nprocessErrorCode(responseCode);
\nreturn -2; \/\/-2 represent access is error
\n}
\nString sHeader;
\nfor(int i=1;;i++)
\n{
\n\/\/DataInputStream in = new DataInputStream(httpConnection.getInputStream ());
\n\/\/Utility.log(in.readLine());
\nsHeader=httpConnection.getHeaderFieldKey(i);
\nif(sHeader!=null)
\n{
\nif(sHeader.equals(“Content-Length”))
\n{
\nnFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader));
\nbreak;
\n}
\n}
\nelse
\nbreak;
\n}
\n}
\ncatch(IOException e){e.printStackTrace ();}
\ncatch(Exception e){e.printStackTrace ();}
\nUtility.log(nFileLength);
\nreturn nFileLength;
\n}
\n\/\/\u4fdd\u5b58\u4e0b\u8f7d\u4fe1\u606f\uff08\u6587\u4ef6\u6307\u9488\u4f4d\u7f6e\uff09
\nprivate void write_nPos()
\n{
\ntry{
\noutput = new DataOutputStream(new FileOutputStream(tmpFile));
\noutput.writeInt(nStartPos.length);
\nfor(int i=0;i<\/nstartpos> 0 && nStartPos < nEndPos && !bStop)\n{\nnStartPos += fileAccessI.write(b,0,nRead);\n\/\/if(nThreadID == 1)\n\/\/ Utility.log(\"nStartPos = \" + nStartPos + \", nEndPos = \" + nEndPos);\n}\nUtility.log(\"Thread \" + nThreadID + \" is over!\");\nbDownOver = true;\n\/\/nPos = fileAccessI.write (b,0,nRead);\n}\ncatch(Exception e){e.printStackTrace ();}\n}\n}\n\/\/\u6253\u5370\u56de\u5e94\u7684\u5934\u4fe1\u606f\npublic void logResponseHead(HttpURLConnection con)\n{\nfor(int i=1;;i++)\n{\nString header=con.getHeaderFieldKey(i);\nif(header!=null)\n\/\/responseHeaders.put(header,httpConnection.getHeaderField(header));\nUtility.log(header+\" : \"+con.getHeaderField(header));\nelse\nbreak;\n}\n}\npublic void splitterStop()\n{\nbStop = true;\n}\n}\n\/*\n**FileAccess.java\n*\/\npackage NetFox;\nimport java.io.*;\npublic class FileAccessI implements Serializable{\nRandomAccessFile oSavedFile;\nlong nPos;\npublic FileAccessI() throws IOException\n{\nthis(\"\",0);\n}\npublic FileAccessI(String sName,long nPos) throws IOException\n{\noSavedFile = new RandomAccessFile(sName,\"rw\");\nthis.nPos = nPos;\noSavedFile.seek(nPos);\n}\npublic synchronized int write(byte[] b,int nStart,int nLen)\n{\nint n = -1;\ntry{\noSavedFile.write(b,nStart,nLen);\nn = nLen;\n}\ncatch(IOException e)\n{\ne.printStackTrace ();\n}\nreturn n;\n}\n}\n\/*\n**SiteInfoBean.java\n*\/\npackage NetFox;\npublic class SiteInfoBean {\nprivate String sSiteURL; \/\/Site's URL\nprivate String sFilePath; \/\/Saved File's Path\nprivate String sFileName; \/\/Saved File's Name\nprivate int nSplitter; \/\/Count of Splited Downloading File\npublic SiteInfoBean()\n{\n\/\/default value of nSplitter is 5\nthis(\"\",\"\",\"\",5);\n}\npublic SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter)\n{\nsSiteURL= sURL;\nsFilePath = sPath;\nsFileName = sName;\nthis.nSplitter = nSpiltter;\n}\npublic String getSSiteURL()\n{\nreturn sSiteURL;\n}\npublic void setSSiteURL(String value)\n{\nsSiteURL = value;\n}\npublic String getSFilePath()\n{\nreturn sFilePath;\n}\npublic void setSFilePath(String value)\n{\nsFilePath = value;\n}\npublic String getSFileName()\n{\nreturn sFileName;\n}\npublic void setSFileName(String value)\n{\nsFileName = value;\n}\npublic int getNSplitter()\n{\nreturn nSplitter;\n}\npublic void setNSplitter(int nCount)\n{\nnSplitter = nCount;\n}\n}\n\/*\n**Utility.java\n*\/\npackage NetFox;\npublic class Utility {\npublic Utility()\n{\n}\npublic static void sleep(int nSecond)\n{\ntry{\nThread.sleep(nSecond);\n}\ncatch(Exception e)\n{\ne.printStackTrace ();\n}\n}\npublic static void log(String sMsg)\n{\nSystem.err.println(sMsg);\n}\npublic static void log(int sMsg)\n{\nSystem.err.println(sMsg);\n}\n}\n\/*\n**TestMethod.java\n*\/\npackage NetFox;\npublic class TestMethod {\npublic TestMethod()\n{ \/\/\/xx\/weblogic60b2_win.exe\ntry{\nSiteInfoBean bean = new SiteInfoBean(\"http:\/\/localhost\/xx\/weblogic60b2_win.exe\",\"L:\\\\temp\",\"weblogic60b2_win.exe\",5);\n\/\/SiteInfoBean bean = new SiteInfoBean(\"http:\/\/localhost:8080\/down.zip\",\"L:\\\\temp\",\"weblogic60b2_win.exe\",5);\nSiteFileFetch fileFetch = new SiteFileFetch(bean);\nfileFetch.start();\n}\ncatch(Exception e){e.printStackTrace ();}\n}\npublic static void main(String[] args)\n{\nnew TestMethod();\n}\n}<\/nstartpos><\/p>\n","protected":false},"excerpt":{"rendered":"

(\u4e00)\u65ad\u70b9\u7eed\u4f20\u7684\u539f\u7406 \u5176\u5b9e\u65ad\u70b9\u7eed...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[379,1214,512],"class_list":["post-180","post","type-post","status-publish","format-standard","hentry","category-2","tag-java","tag-1214","tag-512"],"_links":{"self":[{"href":"https:\/\/out.cat\/index.php?rest_route=\/wp\/v2\/posts\/180","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/out.cat\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/out.cat\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/out.cat\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/out.cat\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=180"}],"version-history":[{"count":0,"href":"https:\/\/out.cat\/index.php?rest_route=\/wp\/v2\/posts\/180\/revisions"}],"wp:attachment":[{"href":"https:\/\/out.cat\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=180"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/out.cat\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=180"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/out.cat\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}