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/* N`1r;%5 **SiteFileFetch.java F1c&0*_A */ =x
H~ww (D package NetFox; 2C1+_IL import java.io.*; '{VM>Q import java.net.*; TB#Nk5 zH=hIVc )`Ed_F}k public class SiteFileFetch extends Thread { jdlG#j-\ a5V=!OoMk g^j7@dum SiteInfoBean siteInfoBean = null; //文件信息Bean Funj!x'uE long[] nStartPos; //开始位置 j@ v-| long[] nEndPos; //结束位置
TQ' e FileSplitterFetch[] fileSplitterFetch; //子线程对象 p;`N\.ld long nFileLength; //文件长度 ' ^a!`"Bc boolean bFirst = true; //是否第一次取文件 o](.368+4 boolean bStop = false; //停止标志 m[8
@Unt File tmpFile; //文件下载的临时信息 /aOlYqM(> DataOutputStream output; //输出到文件的输出流 C +@ i Pux)>q] C //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) @T7PZB&xnl public SiteFileFetch(SiteInfoBean bean) throws IOException , N
344y { J"&y|;G siteInfoBean = bean; oEIqA //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); zs8I tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); v<&v]!nF if(tmpFile.exists ()) 5f_7&NxT { sN]Z
#7 bFirst = false; rPO}6lsc read_nPos(); `qu]Pxk } CQ> ]jQ,2 else 4B$bj`h { a))*F!}c nStartPos = new long[bean.getNSplitter()]; B.K4!/cF nEndPos = new long[bean.getNSplitter()]; 3;Hd2 ;G } 2AK}D%jfc 6x4_b voh^|(:(TH $1e pf } 6~@5X}^<0 usH%dzKK ]l&'k23~p public void run() o#}mkE87 { \ V?I+Gc //获得文件长度 }Vl^EAR //分割文件 V6*?$o //实例FileSplitterFetch 1b[NgOXY= //启动FileSplitterFetch线程 c F=P!2@ //等待子线程返回 SQ <f try{ KN, 4@4 if(bFirst) 3EOyq^I% { }]GbUC!Zb nFileLength = getFileSize(); J6auUm` ` if(nFileLength == -1) 4J}3,+ { !.eAOuq System.err.println("File Length is not known!"); "TFwHe3C4 } !I7 ? else if(nFileLength == -2) %zflx~ { OG}KqG!n System.err.println("File is not access!"); mz-N{ >k } "tX7%( else h2;l1G, { ~`[8"YUL for(int i=0;i<nStartPos.length;i++) vJThU$s- { ?*+1~m> nStartPos = (long)(i*(nFileLength/nStartPos.length)); 7@a\* |K6 } [gn[nP9 for(int i=0;i<nEndPos.length-1;i++) vHc#m@4o { 3+zzi nEndPos = nStartPos[i+1]; `^%@b SE( } Tk](eQsy.v nEndPos[nEndPos.length-1] = nFileLength; PUKVn+h } A:)sg!Lt } #ovM(Mld xVTo4-[p 2Fq=jOA)z$ //启动子线程 A^L?_\e6 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; e^WqJ7j for(int i=0;i<nStartPos.length;i++) 5L3{w+V { ' &N20w fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), qK-qcPLsl siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), L!vWRwZwC nStartPos,nEndPos,i); W0?JVtq0Z Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); |*1xrM:v~ fileSplitterFetch.start(); r\RFDj } >#?iO]). // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Om6Mmoqh siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); niAZ$w // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", WKOI\ nEndPos = " + nFileLength); c/RT0xql* // fileSplitterFetch[nPos.length-1].start(); RNe9h lr i'iO H|s nF|Oy0 //等待子线程结束 Z9f/-|r5 //int count = 0; <M305BH //是否结束while循环 B
G5X_s0/ boolean breakWhile = false; /+29.1#| ]CIe~q E4Zxv* while(!bStop) Iu%^*K% { Iht'e8)gq write_nPos(); O$U}d-Xnx Utility.sleep(500); 4znH$M>bU breakWhile = true; C$_G'XI 8=pv/o A$ J9U3+O for(int i=0;i<nStartPos.length;i++) R.O { ?-S8yqe if(!fileSplitterFetch.bDownOver) wA1Ey:q { 0}D-KvjyP breakWhile = false; OOfyGvs break; []=_<]{ } T;J7+0 } $)f"K if(breakWhile) i0b.AA break; 8XlU%a6x zF?31\GOX gY%OhYtF2 //count++; @o60c //if(count>4) ?0uOR*y' // siteStop(); (HPz } ovbEmb +\srZ<67 3jXR"@Z- System.err.println("文件下载结束!"); J ZA*{n2 } e|JIrOnc catch(Exception e){e.printStackTrace ();} e) ]RA?bF } pbPz$Y [0wP\{% dDo6fP2 //获得文件长度 i`R(7Z public long getFileSize() m^'~&!ba { :q(D(mK int nFileLength = -1; B_!wutV@ try{ 'OG{*TDPu URL url = new URL(siteInfoBean.getSSiteURL()); NtqFnxm/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &jt02+Hj' httpConnection.setRequestProperty("User-Agent","NetFox"); x
~wNO/ =pyVn_dg jmSt?M0.xV int responseCode=httpConnection.getResponseCode(); z+ uL "PG[ if(responseCode>=400) }'PG!+=I { Etw~* processErrorCode(responseCode); & \JLTw return -2; //-2 represent access is error MCM/=M'y } O/(3 87= U \zBd<H4S: +)?, {eE| String sHeader; z}iSq$ Qg[heND b$dBV}0 L for(int i=1;;i++) 8>ESD}( { >B`Cch/'U //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); t?KUK>>w //Utility.log(in.readLine()); zf`5>h| sHeader=httpConnection.getHeaderFieldKey(i); -Sx0qi'% if(sHeader!=null) aXX,Zu^ { o
T:j:n if(sHeader.equals("Content-Length")) h,]tQ#!s8 { z/)$D nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); tc"T}huypU break; )ni"qv~J } u
IAZo; } DQ%`v= else c!.=%QY break; X{#bJ } 7qpzk7X?pR } 9z+vFk` catch(IOException e){e.printStackTrace ();} 0,:iE\ catch(Exception e){e.printStackTrace ();} $|rCrak; [+y&HNf h]<GTWj Utility.log(nFileLength); _cR6ik zW( NS
h%t+XU] 3T"2S[gT return nFileLength; Pa3{Ds } I+*osk B^H4Q
4- 6euR'd^Qi //保存下载信息(文件指针位置) 1]"D%U= private void write_nPos() 2@rp<&s { _MGNKA6JI try{ MgHOj output = new DataOutputStream(new FileOutputStream(tmpFile)); ]U_5\$ output.writeInt(nStartPos.length); [SK2 x4 for(int i=0;i<nStartPos.length;i++) G}182"#4 { C\y[&egww // output.writeLong(nPos); 2=jd;2~ output.writeLong(fileSplitterFetch.nStartPos); ~azF+}x90N output.writeLong(fileSplitterFetch.nEndPos); 43+EX.c } f#*h^91x output.close(); ,NjX&A@ } 2j2mW>Z catch(IOException e){e.printStackTrace ();} Y,3z-Pa=@ catch(Exception e){e.printStackTrace ();} u9esdOv } Dq{:R ~&t!$ DxE(9j //读取保存的下载信息(文件指针位置) ,?C|.5 private void read_nPos() &/ \O2Aw8 { CR%D\I$o try{ c$@`P DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Xq+!eOT int nCount = input.readInt(); VEL:JsY nStartPos = new long[nCount]; 2O?Vr"
A nEndPos = new long[nCount]; g7.7E6%H for(int i=0;i<nStartPos.length;i++) ll^Th > { C/SapX nStartPos = input.readLong(); sGXp}{E9 nEndPos = input.readLong(); f1)HHUB } F~tm`n8Z input.close(); E%-Pyg* } 3yeK@>C catch(IOException e){e.printStackTrace ();} ;gZwQ6)i catch(Exception e){e.printStackTrace ();} 2b; rr } &r&;<Q V*~1,6N[ += X).X0K private void processErrorCode(int nErrorCode) v]B0!k&4. { ~sZqa+jB0 System.err.println("Error Code : " + nErrorCode); `6|i&w:b } l R:Ok8e t.3Ct@wK 3?!G- //停止文件下载 1_N~1Ik public void siteStop() z8
hTZU { 99\{! W bStop = true; |Dl*w/n
for(int i=0;i<nStartPos.length;i++) }@3Ud'
Y fileSplitterFetch.splitterStop(); C4&U:y<ju b7?U8/#' MDMtOfe| } SNQz8(O } mgmWDtxN //负责部分文件的抓取 Ah6wU|_-g **FileSplitterFetch.java pWWL{@ J */ %4?SY82 package NetFox; qFvg}}^y ~5lKL5w _<u8%\ import java.io.*; vpZu.#5c import java.net.*; @N,:x\
;k9
? 3r,1^h public class FileSplitterFetch extends Thread { p:DL:^zx Y}AmX 3!i.Fmo String sURL; //File URL o?:;8]sr! long nStartPos; //File Snippet Start Position ;X?Ah long nEndPos; //File Snippet End Position TYs+XJ'Xj int nThreadID; //Thread's ID =gxgS<bde boolean bDownOver = false; //Downing is over vGx?m@ boolean bStop = false; //Stop identical #G'S
ve? FileAccessI fileAccessI = null; //File Access interface _myg._[ AyQS4A.s[ w8eG; public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException tQNk=}VR7r { Tns?mQ this.sURL = sURL; Z7tU0 this.nStartPos = nStart; .`oJcJ this.nEndPos = nEnd; b&\3ps nThreadID = id; jF%)Bhn( fileAccessI = new FileAccessI(sName,nStartPos);//定位 W&fW5af9 } @4 zi]v ek<PISlci hQgk.$g public void run() ib5;f0Qa { :FX'[7;p while(nStartPos < nEndPos && !bStop) +-Z"H) { ,pQ'w7 3::3r}g DhtU]w} try{ M/::`yJQu URL url = new URL(sURL); an*]62 l HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); fe&
t- httpConnection.setRequestProperty("User-Agent","NetFox"); ikEWY_1Y String sProperty = "bytes="+nStartPos+"-"; g@S@d&9 httpConnection.setRequestProperty("RANGE",sProperty); !Z<mrr;T@ Utility.log(sProperty); X_lUD?y /|4Q9= dWzDSlP& InputStream input = httpConnection.getInputStream(); Bo\a //logResponseHead(httpConnection); WUE)SVf =:xV(GK} 'Z*\1Ci byte[] b = new byte[1024]; jI*}y[o int nRead; QLn5#x~xb while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) %Y)PH-z { 5 {T9* nStartPos += fileAccessI.write(b,0,nRead); EIq{C-( //if(nThreadID == 1) q7 %=`l // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); b>hBct} } T..N*6<X hj^G}4 ]p4`7@@)* Utility.log("Thread " + nThreadID + " is over!"); `^XRrVX< bDownOver = true; x'E'jh% //nPos = fileAccessI.write (b,0,nRead); [?|l X$< } lKh2LY=j catch(Exception e){e.printStackTrace ();} N>&{Wl'y \ } P.[6s$J } ?V&Ld$db gmF_~"^34 ZYwBw:y}y //打印回应的头信息 %5Q7 #xU public void logResponseHead(HttpURLConnection con) i#pjv'C { &y#\1K for(int i=1;;i++) ^]#Ptoz^(l { [OFTP#}c String header=con.getHeaderFieldKey(i); Pi&fwGL if(header!=null) B|]t\(~$[ //responseHeaders.put(header,httpConnection.getHeaderField(header)); ,(@Y%UW: Utility.log(header+" : "+con.getHeaderField(header)); Dg9--wI}I9 else "k\Ff50 break; (c|$+B^* } Jf%!I } ,mO(!D O+(. 29 Q{H!s_6iyv public void splitterStop() 2 Ft0C2 { XhlI|h-j bStop = true; ;X*K*q } zumR( <l 3X-{2R/ 3 %KabyvOl) } g[=\KrTSg 7`u A X <ba|( /* `'G),{ j **FileAccess.java $4$?M[ *//文件访问(定位,写) h8iaJqqvJ package NetFox; O" X!S_R import java.io.*; c"f-$^< 7(A
G] ]HNT(w@ public class FileAccessI implements Serializable{ %T&&x2p^=? }2iKi(io* //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 WL)_8! RandomAccessFile oSavedFile; UZ4tq long nPos; 4 BE:&A ]zhq.O
>2{ wRV`v$*6 public FileAccessI() throws IOException %mB!|'K% { 8r`VbgI& this("",0); =\Tud-1Z } W[[YOK1T YWcui+4p} &P,4EaC9; public FileAccessI(String sName,long nPos) throws IOException =B/s HN { 2#$}yP~ oSavedFile = new RandomAccessFile(sName,"rw"); QN2*]+/h this.nPos = nPos; LhVLsa(-% oSavedFile.seek(nPos); DiGUxnP } uusY,Dt/9 :N*q;j> y :i[~ y public synchronized int write(byte[] b,int nStart,int nLen) Kd`l[56# { +e\:C~2f28 int n = -1; <M=W)2D7 try{ zal3j^ oSavedFile.write(b,nStart,nLen); DMK"Q#Vw n = nLen; \0*yxSg,^ } /\3XARt catch(IOException e) `F-Dd4B { *FLTz(T e.printStackTrace (); T,xVQ4J? } fr,CH{Uq 6gg# Z <750-d! return n; <@x+N%C } RBv= $:-= > #/XK&(X } }'w^<:RSy G8<It5CU @0/@p"j /* -+
IX[ **SiteInfoBean.java p@N Er,GB */ WrK^> package NetFox; COkLn)+0 eLt Cxe 1CS]~1Yp: public class SiteInfoBean { PTI'N%W G5XnGl}Q gKm~cjCB`~ private String sSiteURL; //Site's URL e u=f-HW] private String sFilePath; //Saved File's Path 0\_R|i_`> private String sFileName; //Saved File's Name ~qLhZR\g^ private int nSplitter; //Count of Splited Downloading File VtPoc(o4] kGBl)0pr`x PU@U@ public SiteInfoBean() i*cE {//nSplitter的缺省值为5 AVevYbucB //default value of nSplitter is 5 `X.=uG+m this("","","",5); _>?8eC ]4a } `>K k;` "'H7F,k' rfZj8R& public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) RQK** { whg4o|p sSiteURL= sURL; bcx{_&1p sFilePath = sPath; EH!EyNNb sFileName = sName; =VX<eV this.nSplitter = nSpiltter; @=zBF'<.9 }~\].I6 ;uA_gn! } 1Sc~Vb|> `bt)'ERO%# .+JPtL public String getSSiteURL() e,j ?_p { L&gEQDPgq| return sSiteURL; k~9Ywf } $qyM
X[ >G3J3P( 7i|hlk; public void setSSiteURL(String value) o}^vREO { I3E8vi%B. sSiteURL = value; iDkWW } ^J5V!i$ ~3-YxCn% o j4)7{ public String getSFilePath() }HQT@&= { ,IVr4#w0= return sFilePath; +KwF
U } e[k;SSs oWaIjU0 HS&uQc a public void setSFilePath(String value) uF.\dY\xv { r0$9c sFilePath = value; JU%yqXO } v,.n/@s|X 1.d9{LO [- "y
,(9_# public String getSFileName() 7Hkf7\JY { Xi`U`7?D(= return sFileName; [@FeRIu8 } 1oW]O@R uA}FuOE6 ?KuJs9SM public void setSFileName(String value) Ex s _LN { +MoxvW6 sFileName = value; +fQ$~vr{' } O>):^$-K% KZ
>"L tIy/QN_42 public int getNSplitter() 2mp>Mn~K^ { bg3jo1J return nSplitter; 7R`ZTfD } 9kg>)ty@ Q@.9wEAJ EV,NJ3V public void setNSplitter(int nCount) yURh4@ { c"&!=@ nSplitter = nCount; i.dAL)V } e=Tc(Mwn } Qc<O; # Pg8= 8}`8lOE7 /* _nFvM'`< **Utility.java J1ro\" */ 1#_j6Q2 package NetFox; nz?BLO= /Ta0}Y(y 3)MM5
bb$ public class Utility { 5OqsnL_V j\L$dPZ #w?%&,Kp public Utility() z)y(31K<1 { ph'SS=!. a|{<#<6n( pC.P } `e;Sjf< R/FV'qy] //线程睡眠 Ytnr$*5. public static void sleep(int nSecond) Us~wv"L=UX { QS?9&+JM | try{ /%'7sx[p
Thread.sleep(nSecond); Y~?YA/.x } | BWK"G catch(Exception e) H9m2Whq { ?-v?SN# e.printStackTrace (); @ y2Bq[' } >oYwzK0& } $[;eb, =` >Nfa+, //日志 F88SV6 public static void log(String sMsg) ~(P\F&A(& { >h-6B= System.err.println(sMsg); .{ L m } Ps 5wQaS YZu#0) #Z5Wk public static void log(int sMsg) 3>3ZfFC { m`0{j1K System.err.println(sMsg); EGO@`<"h } tD482Sb= } U,}T ]J s/|'1E\F dOgM9P /* ptL}F~ **TestMethod.java (:k`wh& */ ]-OkW.8d1 package NetFox; =U|SK"oO FOyfk$ BrmFwXLP" public class TestMethod { xyCcd= WZ-{K"56 Ybiz]1d public TestMethod() A^7Zy79 { ///xx/weblogic60b2_win.exe %cjav try{ e%7P$. SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); z]_CFo1'l //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ZlXs7
&_ SiteFileFetch fileFetch = new SiteFileFetch(bean); {%}6d~Bg fileFetch.start(); ~OfKn1D } wWswuhq< catch(Exception e){e.printStackTrace ();} O@&I.d$ Rzj!~`&N {]N?DmF } [NDYJ'VGe G?(:Z= r/:'}os; public static void main(String[] args) @TG~fJSA12 { )Em,3I/.l new TestMethod(); o: DnZN } #?|z&9 } 3{E}^ve 点击下载更多相关资料
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