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/* UTTC:=F+ **SiteFileFetch.java yo*iv+l */ /,Rca1W package NetFox; nFfCw%T? import java.io.*; }91mQ`3 import java.net.*; H< ;Fb;b P*PL6UQ f^)uK+:. public class SiteFileFetch extends Thread { +2zuIW. Xo@YTol tqQ0lv^J SiteInfoBean siteInfoBean = null; //文件信息Bean 2\w=U,;( long[] nStartPos; //开始位置 ~}5Ml_J$,l long[] nEndPos; //结束位置 30_un FileSplitterFetch[] fileSplitterFetch; //子线程对象 MA+-2pMc|7 long nFileLength; //文件长度 ^-IsK#r.k boolean bFirst = true; //是否第一次取文件 {}pqxouE boolean bStop = false; //停止标志 kppRQ Q*[ File tmpFile; //文件下载的临时信息 +?iM$}8!U DataOutputStream output; //输出到文件的输出流 ~+#--BhV ?*'$(}r3 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) uit-Q5@~ public SiteFileFetch(SiteInfoBean bean) throws IOException UNQRtR/ { 4*vas]
siteInfoBean = bean; s1vrzze //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); BZ?W>'B%$ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); zcB2[eaV if(tmpFile.exists ()) z`/.v&<>V { #Q3PzDfj bFirst = false; RW7oL:$dt read_nPos(); %?f:" } $a^isd4 else $G_Q`w=jM { ,Us2UEWNv nStartPos = new long[bean.getNSplitter()]; >J}n@MZ nEndPos = new long[bean.getNSplitter()]; 5!ubY
6Ph } zw:C*sY z"K(
bw6 q{GSsDo-:V JYd7@Msfc } b;L>%; }E5#X R )_v\{N public void run() )@qup _M@ { (a} //获得文件长度 P=^#%7J/l //分割文件 W3/ 7BW` //实例FileSplitterFetch 5)yOw|Bd //启动FileSplitterFetch线程 "Py Wo //等待子线程返回 ,iVPcza try{ ]&:b<]K3 if(bFirst) nnE_OK!}T { h1XMx'}B nFileLength = getFileSize(); (.1 rtj if(nFileLength == -1) Q)S>VDLA { ,k~j6Z System.err.println("File Length is not known!"); um jhG6 } y|.fR>5 else if(nFileLength == -2) v'@b. R, { `x}
Dk<HF System.err.println("File is not access!"); _Dj<Eu_ } 23-t$y] else h/Hl?O8[ { y?#9>S >:\ for(int i=0;i<nStartPos.length;i++)
Znta#G0 { A/"}Y1#qX\ nStartPos = (long)(i*(nFileLength/nStartPos.length)); -~][0PVL9 } NQC3!=pQ}Y for(int i=0;i<nEndPos.length-1;i++) A=%k/ { x pTDYF nEndPos = nStartPos[i+1]; 6z3T?`}Y } RxZm/:yuJ. nEndPos[nEndPos.length-1] = nFileLength; Taf
n:Nw} } >`89N'lZBm } MCeu0e^) @8nLQh^ BF36V\ //启动子线程 HK0::6n{ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 's[BK/ for(int i=0;i<nStartPos.length;i++) W7L+8LU; { 4TUtY: fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~o@\
n siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), H#L#2M% nStartPos,nEndPos,i); IyS" Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -|}%~0)/bH fileSplitterFetch.start(); 0/\PZX+ } yW\XNX // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {/d4PI7)tK siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); {7?9jEj // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", &$qF4B* nEndPos = " + nFileLength);
\Mb(6~nC // fileSplitterFetch[nPos.length-1].start(); hCM8/Vvx6 o\ngR\> py{eX`(MS //等待子线程结束 dL_QX,X-] //int count = 0; [?chK^8 //是否结束while循环 =4tO0 boolean breakWhile = false; c^=R8y-N EZ"bW {'h_'Y`bOQ while(!bStop) ;1W6"3t-Y { W]]q=c%2 write_nPos(); g5#CN:%f Utility.sleep(500); $n= O breakWhile = true; 84=-Lw QsF4Dl dhHEE|vrz for(int i=0;i<nStartPos.length;i++) M8';%=@ { G#H9g PY if(!fileSplitterFetch.bDownOver) !4R>O6k { 74K)aA breakWhile = false; X JY5@I. break; 3;*z3;#} } &%^K,Q" } 6eQsoKK if(breakWhile) \M5P+Wk' break; Lt1U+o[ot =<{h^-j;a #{!O,`qD //count++; -(*nSD9 //if(count>4) vwKw?Z0%J // siteStop(); [O2h-` } +YTx
&Y1`?1;nw uBmxh%]C~ System.err.println("文件下载结束!"); bV@7mmz:X+ } I:#Ok+ catch(Exception e){e.printStackTrace ();} :pwa{P } 3bH~';<
tPA:_ p8=|5. //获得文件长度 Qyz>ZPu}sz public long getFileSize() u4YM^* S. { &Yp+k}XU int nFileLength = -1; q7,^E`5EgU try{ <_9!
URL url = new URL(siteInfoBean.getSSiteURL()); s~^*+kq HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6xHi\L httpConnection.setRequestProperty("User-Agent","NetFox"); :zlpfm2 Ah-8"`E j 1(T )T int responseCode=httpConnection.getResponseCode(); _gKu8$o=- if(responseCode>=400) $A`xhh[ { !.EcP=S processErrorCode(responseCode); )1f+ld%R return -2; //-2 represent access is error o(qEkR:4kd } c3] C:t+ 3 > |uF -Q$b7*"z( String sHeader; KAed!z9 'M8aW!~ Wr5 Q5s)c for(int i=1;;i++) EJLQ&oH[ { vU!8`x) //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Z:@6Lv?CN //Utility.log(in.readLine()); _gW{gLYyJ sHeader=httpConnection.getHeaderFieldKey(i); )lh8
k{ if(sHeader!=null) tMFsA`ng { h4(JUio if(sHeader.equals("Content-Length")) DLi?'K3t { XJSa]P^B1 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); R}r~p?(M break; "jR]MZ } HzvlF0f } d&jjWlHgEN else `
W4dx& break; rjUBLY1( } CWi8Fv } 0(gq;H5x' catch(IOException e){e.printStackTrace ();} QU/fT_ORw catch(Exception e){e.printStackTrace ();} E-fr}R} QHzgy? 2n|CD|V$ux Utility.log(nFileLength); DyfsTx Mra35 QU T"z' return nFileLength; O*G1 QX } l~J*' m2 Hx
%$X ?TpUf //保存下载信息(文件指针位置) #Fs|f3-@ private void write_nPos() &[_ZXVva~ { YT=eVg53 try{ & Kmy}q
output = new DataOutputStream(new FileOutputStream(tmpFile)); yNa;\UF output.writeInt(nStartPos.length); ffE#^| for(int i=0;i<nStartPos.length;i++) Au.:OeJm { I@\+l6&#; // output.writeLong(nPos); 5G(E&>~ output.writeLong(fileSplitterFetch.nStartPos); k_aW output.writeLong(fileSplitterFetch.nEndPos); DM),|Nq" } c?K~/bx. output.close(); Ei5 wel6! } i#W*' catch(IOException e){e.printStackTrace ();} s;Y<BD catch(Exception e){e.printStackTrace ();} ^.goO] } Izo! rC Zx{96G+1 bik*ZC?E //读取保存的下载信息(文件指针位置) >(3\kiYS private void read_nPos() T8XY fcc*h { U
O<:.6" try{ |P~;C6sf DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 2f{T6=SK int nCount = input.readInt(); >7b)y nStartPos = new long[nCount]; s0C:m nEndPos = new long[nCount]; *1A&'T2 for(int i=0;i<nStartPos.length;i++) a#0;==# { 3fr ^ T nStartPos = input.readLong(); OgCy4_a[f nEndPos = input.readLong(); wLJ]&puwm } tous#(&pK input.close(); oyx^a9 } E m{aM catch(IOException e){e.printStackTrace ();} XOy2lJ/ catch(Exception e){e.printStackTrace ();} w%a8XnW]1 } ~/-eyxLTm -rSIBc:$8 #0"~G][# private void processErrorCode(int nErrorCode) +(?>-3_z { U \oy8FZ System.err.println("Error Code : " + nErrorCode); kV&9`c+ } !HK^AwNY u[oUCTY h#qN+qt} //停止文件下载 +dW|^I{H} public void siteStop() "y;bsZBd" { UMMB0(0D bStop = true; `bG7"o` for(int i=0;i<nStartPos.length;i++) @ -:]P8 fileSplitterFetch.splitterStop(); E
D"!n-Hq {1-V]h.<J iwF9[wAft } iL]'y\?lv } }#`:Qb \U //负责部分文件的抓取 <l,o&p,>|c **FileSplitterFetch.java lr@#^ */ 8g~EL{' package NetFox; q]% T:A= T:iP="?{ _.V?A* import java.io.*; Sq2P-y!w import java.net.*; NHQF^2 \\ M+P$/Wk X~9j$3lUBR public class FileSplitterFetch extends Thread { HU ;#XU1 {~Tg7<\L ,
YW|n:X String sURL; //File URL 4QHS{tj long nStartPos; //File Snippet Start Position s!+
pL| long nEndPos; //File Snippet End Position ?]O7Ao int nThreadID; //Thread's ID e}yX_Z'P< boolean bDownOver = false; //Downing is over Vw{*P2v) boolean bStop = false; //Stop identical g);^NAA FileAccessI fileAccessI = null; //File Access interface hJ;$A*Y EbY,N:LK 'gMfN public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ]wVk+%e { ,)FdRRj this.sURL = sURL; aA'TD:&p1 this.nStartPos = nStart; s5&@Cxzl this.nEndPos = nEnd; #*%q'gyHT nThreadID = id; tY|8s]{2 fileAccessI = new FileAccessI(sName,nStartPos);//定位 ~x:DXEV, } G}d-(X m#!=3P7T YB( Gk;] public void run() |N /G'>TS { BU Z
_) while(nStartPos < nEndPos && !bStop) H^%lDz { Z.PBu|Kx *fMpZ+;[m IM@tN L try{ ?~e3&ux URL url = new URL(sURL); cre;P5^E HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); J3RB]O_ httpConnection.setRequestProperty("User-Agent","NetFox"); <O<LYN+( String sProperty = "bytes="+nStartPos+"-"; (!L5-8O httpConnection.setRequestProperty("RANGE",sProperty); 4u;9J*r4 Utility.log(sProperty); */qtzt 4,Ic}CvM (N-RIk73/O InputStream input = httpConnection.getInputStream(); =uHnRY //logResponseHead(httpConnection); !^oV # kOwMs<1J g=L]S-e byte[] b = new byte[1024]; 1c4/}3* int nRead; DOS0;^f while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) dUrElXbXd { ||7x;2e nStartPos += fileAccessI.write(b,0,nRead); LW6ZAETyL //if(nThreadID == 1) VosZJv= // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); f|7\DeY9U } Uu
s. B!]2Se2G !|hoYU>@2L Utility.log("Thread " + nThreadID + " is over!"); LkruL_E> bDownOver = true; &)wiKh"$ //nPos = fileAccessI.write (b,0,nRead); }Db[ 4 } 3g'S\G@ catch(Exception e){e.printStackTrace ();} s8"8y`u } {P%9 } u7%D6W~m0 IY'=DePd
zG }? //打印回应的头信息 f"G- public void logResponseHead(HttpURLConnection con) CvSIV7zYo { ?Ea;J0V for(int i=1;;i++) j l.p'$Fbn { ^FmU_Q0 String header=con.getHeaderFieldKey(i); >eQr<-8 if(header!=null) ^|~mlY@w //responseHeaders.put(header,httpConnection.getHeaderField(header)); H<hVTc{K Utility.log(header+" : "+con.getHeaderField(header)); !3n)|~r;K else $4kH3+WJ break; 8I20*# } 'VyM{:8 } Bs+(L [Z ok^d@zI =uk0@hy9b public void splitterStop() NL=|z=q { )~4II.`%^ bStop = true; Mv544>: } EC2+`HJ" GcIDG`RX \6n!3FLl } ZX!r1*c
6 $n^MD_1! h!~3Dw>,N /* o+`6LKg; **FileAccess.java l&4,v *//文件访问(定位,写) <U5wB]] package NetFox; s^0/"j |7 import java.io.*; 4'j
sDcs F^"_TV0va Hgeg@RP
Q public class FileAccessI implements Serializable{ O RGD >z;[2n' //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 AqKz$ RandomAccessFile oSavedFile; w\54j)rb long nPos; P./V6i<: S=R7`a<.5 +;$oJJ public FileAccessI() throws IOException ](tx<3h { {2/LRPT this("",0); <DKS+R } 5$DHn] q"O.Cbk />¬$> public FileAccessI(String sName,long nPos) throws IOException B]m@:|Q { 4c
oJRqf= oSavedFile = new RandomAccessFile(sName,"rw"); U~h'*nV& this.nPos = nPos; xq-17HKs oSavedFile.seek(nPos); 7^wc)E^H } :tIC~GG]_) IDkWGh *n]7 public synchronized int write(byte[] b,int nStart,int nLen) \k;`}3uO { s]m o$ _na int n = -1; R>DaOH2K* try{ `U+l?S^$ oSavedFile.write(b,nStart,nLen); [A}rbD K n = nLen; Q-ni| } kKD`rfyG\ catch(IOException e) #-pc}Y|< { 7g
R@$(1Z e.printStackTrace (); hjaT^(Y } .s#;s'>g 1h6^>()^ 6x"Q
return n; aQI^^$9g } `D9]*c
!mO :4~g;2oag ^TMJ8`e } `:P
[SJ6@q 3qY K_M^[ /* 5H=ko8fZ= **SiteInfoBean.java ~/mwx8~ */ >zDF2Y[ package NetFox; DI!V^M[~u Gpm{m:$L q o<&J f public class SiteInfoBean { Q{k
At% 8G5Da|\ zBO(`=| private String sSiteURL; //Site's URL [((;+B private String sFilePath; //Saved File's Path D:Q
21Ch private String sFileName; //Saved File's Name IbcZ@'RSw private int nSplitter; //Count of Splited Downloading File >^Se'SE] Hm+ODv9 D")_;NLE1 public SiteInfoBean() Lh.`C7] {//nSplitter的缺省值为5 hp{OL< 2M //default value of nSplitter is 5 8q1wHZ this("","","",5); Wrr cx( } :4^\3~i1X P2nft2/eu? 2e$w?W0^ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) P"<U6zM\sP { )DYI
. sSiteURL= sURL; "t^URp3 sFilePath = sPath; hJzxbr
< sFileName = sName; <hwy*uBrD this.nSplitter = nSpiltter; a0Ik`8^` Fg Lrb# _fZZ_0\Q } Oy 2+b1{ j5
g# M + >cBVx6 public String getSSiteURL() bzdb|I6Z { 0i8LWX_M return sSiteURL; ^
wY[3"{ } <>m }}^ !QDQ_ #
O4gg public void setSSiteURL(String value) JHf { )5|I_PXB sSiteURL = value; ='TE,et@d } 6sa"O89 ~G27;Npy 8foJ I^3 public String getSFilePath() YC_1Ks { l2;CQ7 return sFilePath; E~LTb)
! } 9b?SHzAa nenU)*o ~EK'&Y"1 public void setSFilePath(String value) O5H9Y}i] { hDV20&hq sFilePath = value; :>itXD! } *6 _tQ9G tK
k#LWB ?BhMjsy. public String getSFileName() P>9aI/d9 { h^j?01*Et return sFileName; 1^i Pji/ } M>M`baM1 erVO|<%=R EC|'l public void setSFileName(String value) Jv.UQ { #z1H8CFL" sFileName = value; w,R[C\#J } P;pl,~ 2< hAa9y 3BpZX`l*p public int getNSplitter() D~o$GW% { N41 R return nSplitter; <L&m4O#| } .(Qx{r$ ,RN:^5 p "QvmqI> public void setNSplitter(int nCount) QMEcQV> { (|wz7AY2 nSplitter = nCount; R0oKbs{ } :{(w3<i } $<ld3[l i r[?1 h[Gg}N! /* WoxwEi1~0 **Utility.java *'"^NSJ */ |AC1\)2tT package NetFox; '_b.\_s-d 4[r/}/iGo fr!Pj(Q1 public class Utility { Py{<bd (MHAJ]Rx d6i6hcQE public Utility() cWajrLw { 1,5E`J h=_mNG>R) R-^96fFBy } 1He{v# l|5fE1K9U //线程睡眠 ;\MW$/[JCy public static void sleep(int nSecond) [%&ZPJT%i { % >;#9"O4 try{ XR!us/U`a Thread.sleep(nSecond); n<B<93f/ } /pp1~r.s?> catch(Exception e) j1 =`| { cwV]!=RtO e.printStackTrace (); 5[n(7;+gw } id?h >g } <LRey%{q WMMO5_Mz //日志 X>?b#Eva public static void log(String sMsg) n&A'C\ { ^T~gEv System.err.println(sMsg); CIVnCy z } -l}IZY [=%TnT+^9 _20#2i& public static void log(int sMsg) i_][PTH { w{k)XY40sW System.err.println(sMsg); dJ?XPo"Cm= } z6py"J@ } /.M+fr S <W]g2>9o9 yPw'] " /* 2YuN~- **TestMethod.java X0*QV- RN */ nADX0KI package NetFox; <5=JE*s$NS <)*2LBF@] *-s,.
F+c public class TestMethod { OiDhJ ^s.V;R mZIoaF>t public TestMethod() n&MG7`]N { ///xx/weblogic60b2_win.exe e?bYjJq try{ 76.{0c SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); h d~$WV0# //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); wv^rS^~ SiteFileFetch fileFetch = new SiteFileFetch(bean); 8P:
Rg%0) fileFetch.start(); jPnM>= } }3R13 catch(Exception e){e.printStackTrace ();} XYoIFv?' :fk2]{KTL
'8j$';&` } HG'{J ^t y0~Ia:y 5X.e*; public static void main(String[] args) r6'UUu { (Toq^+`c new TestMethod(); e"r)R8 } `]Bxn)b( } {A|TowBN 点击下载更多相关资料
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