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/* &}b-aAt **SiteFileFetch.java d6g^>}-!t */ 8'VcaU7Nh package NetFox; KqWt4{\8v` import java.io.*; FrQRHbp3 import java.net.*; 7HEUmKb" F'JceU |BE`ASW; public class SiteFileFetch extends Thread { z5IdYF? t|cTl/i
4 k`r`ZA(kQ- SiteInfoBean siteInfoBean = null; //文件信息Bean Mzj|57:gx long[] nStartPos; //开始位置 gP>`DPgb^ long[] nEndPos; //结束位置 Yi#U~ h FileSplitterFetch[] fileSplitterFetch; //子线程对象 S0p[Kt long nFileLength; //文件长度 oTxE]a, boolean bFirst = true; //是否第一次取文件 -i"?2gK boolean bStop = false; //停止标志 ~cW,B} File tmpFile; //文件下载的临时信息 nrRP1`!]T DataOutputStream output; //输出到文件的输出流 c>yqq' LVxR*O //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) +jGSD@32> public SiteFileFetch(SiteInfoBean bean) throws IOException sB%QqFRP { pcO0xrI siteInfoBean = bean; T8-,t];i //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); SR*KZ1U tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); x10u?@ if(tmpFile.exists ()) [BKX$A:Y { {K >}eO:K bFirst = false; 3YJa3fflK read_nPos(); b&E9xD/;r } \"?5CHz* else y-^m { hScC<=W nStartPos = new long[bean.getNSplitter()]; )~H&YINhn nEndPos = new long[bean.getNSplitter()]; %g{<EuK]p } xjg(}w XmX{e.<NZ KVZ-T1K (|.rEaTA[1 } kr>H,%3~
<5:`tC2 db0]D\ public void run() Eao^/MKx- { TjLW<D(i> //获得文件长度 U@<]>.$ //分割文件 < r7s,][& //实例FileSplitterFetch ?'+kZ| //启动FileSplitterFetch线程 z"j]m_mH //等待子线程返回 u#~q86k try{ xmBGZ4f% if(bFirst) n(?BZ'&!O { s\3OqJo%) nFileLength = getFileSize(); !pAb+6~T if(nFileLength == -1) &_W~d0 { ,AEaW System.err.println("File Length is not known!"); ?Oyps7hXx } M
sQ>eSk else if(nFileLength == -2) \ICc?8oL { o%sx(g=q6 System.err.println("File is not access!"); Z,}c) } %+0V0. else Dwuao`~Xm { }`^DO
Ar for(int i=0;i<nStartPos.length;i++) X&s"}Hf { \zM3{{mV/ nStartPos = (long)(i*(nFileLength/nStartPos.length)); l7vxTj@(- } VL2+"< for(int i=0;i<nEndPos.length-1;i++) G7uYkJO { %E*Q0/ nEndPos = nStartPos[i+1]; Zj5B}[,l\ } c4Wl^E8 nEndPos[nEndPos.length-1] = nFileLength; M"
R=;n } \k>1q/T0V } jU0E=;1 iWp
6^g /lDei} //启动子线程 C q)Cwc[H fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; (L'|n*Cr for(int i=0;i<nStartPos.length;i++) g#b9xTGJ^ { 0I['UL^!F fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #bwGDF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), r<c&;* nStartPos,nEndPos,i); vtF|:*h Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); E(g$f.9 fileSplitterFetch.start(); iOJ5KXrAO } NE4 }!I // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), IaT\ymm` siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); EFn[[<&><t // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Jp"yb`w nEndPos = " + nFileLength); XJe}^k // fileSplitterFetch[nPos.length-1].start(); }*?,&9/_) +=K =B nZ %%{#T7 //等待子线程结束 _"[Ls?tRX //int count = 0; $0XR<D //是否结束while循环 bCqTubbx!t boolean breakWhile = false; d<Dm( J#xZ.6) lKG' KR. while(!bStop) XNJ3.w:R { Y49&EQ write_nPos(); ?azcWf z0 Utility.sleep(500); Y.kgJ #2 breakWhile = true; qL4s@<|~ n?*r, )' 89Ir}bCr for(int i=0;i<nStartPos.length;i++) 1pAcaJzf { A DVUx} if(!fileSplitterFetch.bDownOver) 9,[AfI { h@PE:= breakWhile = false; 7n,=`0{r break; {mUt|m7! } XAZPbvG|$ } ![9$ru if(breakWhile) cx]H8]ch7 break; 0D Lw dhjX[7Bl9 Eq|5PE^7 //count++; zx5#eMD //if(count>4) lffw
" // siteStop();
&Ufp8[ } Y#QXvo% Y"L |D,ex &\%\"Zh System.err.println("文件下载结束!"); ST2:&xH( } O?ODfO+> catch(Exception e){e.printStackTrace ();} bgxk:$E } 67XUhnE />N# PF @]!9;?so //获得文件长度 .yDGw Lry public long getFileSize() e_"m\e#N { zhJ0to[%? int nFileLength = -1; k* v${1& try{ AGm=0Om URL url = new URL(siteInfoBean.getSSiteURL()); UVXSW*$ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); S*gm[ZLQ httpConnection.setRequestProperty("User-Agent","NetFox"); N\];{pe> qV;I<AM Np i)R) int responseCode=httpConnection.getResponseCode(); C1+f\A|9FP if(responseCode>=400) cUr!U\X[ { g)R 2V processErrorCode(responseCode); &Q#*Nnb3 return -2; //-2 represent access is error &>B"/z } @meT8S9t mz+UkA' .rITzwgB String sHeader; M>[
A p_(En4QSH oR,6esA+6n for(int i=1;;i++) reNf?7G+m { c#>(8#'.U //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); .#-F@0a //Utility.log(in.readLine());
46pR!k sHeader=httpConnection.getHeaderFieldKey(i); q2s0g*z if(sHeader!=null) "l9aBBiu { -- FzRO{D if(sHeader.equals("Content-Length")) e0h[(3bXs$ {
)UM^#<- nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); [8^q3o7n break; tv.<pP9-C } jz![#-G } 92t.@!m` else b,YNCb]H break; r uGeN } $xbW*w } (wM` LE(Ks catch(IOException e){e.printStackTrace ();} pA8As catch(Exception e){e.printStackTrace ();} v&'#Gg Y*PfU+y~ /KX+'@ Utility.log(nFileLength); /1v9U|j (/N&_r4x 5.oIyC^Ik return nFileLength; $\Y&2&1s } P3: t
4^ Pv/v=s>X -PAEJn5$O //保存下载信息(文件指针位置) 4$[o; t> private void write_nPos() n\l?+)S * { @$T$ hMl try{ CpmT* output = new DataOutputStream(new FileOutputStream(tmpFile)); _OTVQo Ap output.writeInt(nStartPos.length); #$-E5R;x for(int i=0;i<nStartPos.length;i++) %:d7Ts&?Z { #aU!f"SS // output.writeLong(nPos); +q'1P}e output.writeLong(fileSplitterFetch.nStartPos); 5EcVW|( output.writeLong(fileSplitterFetch.nEndPos); [i/!ovcY } gK`w|kh` output.close(); ur\6~'l4 } rBNVI;JZW catch(IOException e){e.printStackTrace ();} v/q-{1 catch(Exception e){e.printStackTrace ();} 5tQz!M } <[cpaZT, P,{Q k~iu (Z(S?`') //读取保存的下载信息(文件指针位置) {h7 vJ^ private void read_nPos() 31a,i2Q4 { 0_gN]>,9n try{ >8"Svt$ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); q[a\a7U z int nCount = input.readInt(); oCaYmi=: nStartPos = new long[nCount]; w}>%E6UY nEndPos = new long[nCount]; j#n ]q{s4 for(int i=0;i<nStartPos.length;i++) _|#abLh% { k.ou$mIY nStartPos = input.readLong(); FOsd{Fw nEndPos = input.readLong(); nc k/Dw } sv%X8 input.close(); `Npa/Q } _xaum catch(IOException e){e.printStackTrace ();} {Ya$Q#l catch(Exception e){e.printStackTrace ();} K=[7<b,:3 } cERIj0~ G<$:[ +w q !z"YpYB private void processErrorCode(int nErrorCode) z4:!*:.Asu { ltNCti{Q System.err.println("Error Code : " + nErrorCode); l/'GbuECm } wf\"&xwh?
/:4J x|~8?i$% //停止文件下载 N>H@vt~ public void siteStop() 4^L;]v,|7 { u /F!8# bStop = true; k4K.
mlIO for(int i=0;i<nStartPos.length;i++) F]
c\Qt fileSplitterFetch.splitterStop(); XHk"nbj `MOw\Z).. Ek)drt7cy } q`c!!Lg } ;
j!dbT~5 //负责部分文件的抓取 hu}$ \ **FileSplitterFetch.java el9P@r0 */ E )_n?>Ar package NetFox; g-sNYd%?a 4E^ ?}_$ wXQxZuk[ import java.io.*; O+}py{ st import java.net.*; 8_('[89m + `|A/w q5(t2nNb public class FileSplitterFetch extends Thread { &>JP.//spi mJUM#ry tAAMSb9[d String sURL; //File URL
H9*k(lnz` long nStartPos; //File Snippet Start Position \?xM%(:<Q long nEndPos; //File Snippet End Position r].n=455[ int nThreadID; //Thread's ID f$C{Z9_SX boolean bDownOver = false; //Downing is over xe!bfzU boolean bStop = false; //Stop identical :wC\IwG~CE FileAccessI fileAccessI = null; //File Access interface 7iP+!e}$. uHg q"e ~1uQyt public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException e|]e\Or> { W8d-4')| this.sURL = sURL; +S4n416K this.nStartPos = nStart; i>Q!5 this.nEndPos = nEnd; h=#w< @ nThreadID = id; :ppaq fileAccessI = new FileAccessI(sName,nStartPos);//定位 hq=;ZI } E-z5mX.2 :$k*y%Z*N& AP&//b,^M public void run() *[[Gu^t^! { t(z]4y while(nStartPos < nEndPos && !bStop) y :;.r: { AF'< :?Ns>#6t yvd)pH<a2 try{ f^F;`;z URL url = new URL(sURL); 981-[ga`Y HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); hXTfmFy{n httpConnection.setRequestProperty("User-Agent","NetFox"); F3|^b{'zO String sProperty = "bytes="+nStartPos+"-"; jK w
96 httpConnection.setRequestProperty("RANGE",sProperty); 6w^P{%ul Utility.log(sProperty); `c
2v{WX nR_Zrm InputStream input = httpConnection.getInputStream(); _S r}3 //logResponseHead(httpConnection); Kip&YB%rk | v!N1+v0 (]]hSkE byte[] b = new byte[1024]; p@tg pFt int nRead; vIV|y>;g while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) u$T]A8e { )3h\QE!z nStartPos += fileAccessI.write(b,0,nRead); &;@L]
o //if(nThreadID == 1) <],{at` v // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); $k~TVm
Yex } J K/{IkF ]\pi!oa :&BPKqKp Utility.log("Thread " + nThreadID + " is over!"); &L8RLSfX bDownOver = true; s=8H<'l //nPos = fileAccessI.write (b,0,nRead); D3o,2E(o } x%mRDm~- catch(Exception e){e.printStackTrace ();} (?4%Xtul1 } M$K%e } V*?cMJ_G 5Tl5T& 6 >kU Lp //打印回应的头信息 ZM<6yj"f public void logResponseHead(HttpURLConnection con) aXe&c^AR { hr
vTFJ for(int i=1;;i++) &N}"4 { MPB[~#: String header=con.getHeaderFieldKey(i); }1#m+ (; if(header!=null) }_+XN"}C //responseHeaders.put(header,httpConnection.getHeaderField(header)); * 6}M.`.- Utility.log(header+" : "+con.getHeaderField(header)); R$&; else ob7'''i break; e;.,x 5+ } Ks.b).fH } p(F@lL- Olzw)WjG !#0)`4O public void splitterStop() #T)Gkc"{ { o5Oig bStop = true; OUulG16kK } ASXGM0t H{}&|;0 K=f4<tP_ } XCM!8x?K "c%wq0 %1#\LRA( /* kz=ho~ @ **FileAccess.java T~UDD3 *//文件访问(定位,写) )LP'4* package NetFox;
j^jC| import java.io.*; d@3DsE.{i 6P{bUom? =3(v4E':5 public class FileAccessI implements Serializable{ >2#<gp3 vobC/m //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 _T)y5/[ RandomAccessFile oSavedFile; S#ryEgc] long nPos; ,M.C]6YMr 2}^=NUM\NX bm#5bhX\| public FileAccessI() throws IOException *R6lK& { P& 1$SWNyW this("",0); D`XXR}8V } zg jg #| u|<?mA! H;`F}qQ3 public FileAccessI(String sName,long nPos) throws IOException gJ l^K { INndTF oSavedFile = new RandomAccessFile(sName,"rw"); 19fa7E< this.nPos = nPos; [Qs`@u<% oSavedFile.seek(nPos); =z}PR1X! } $:u*)&"t| Le#srr AE~zmtW public synchronized int write(byte[] b,int nStart,int nLen) #IH9S5B [ { x(c+~4:_M int n = -1; Ug*B[q/ try{ 21!X[)r oSavedFile.write(b,nStart,nLen); NVzo)C8kb n = nLen; EC,,l'%a|/ } _`gF%$]b catch(IOException e) QN8+Uj/zx { 4j3q69TZR e.printStackTrace (); e"866vc, } 2*snMA inW7t2p<s n1\$|[^6 return n; (H:c80/V } C2<TR PT 4`?PtRX LB@<Q.b,U } ];5J *o1US L\mF[Kd#+T /* /J^dzvH **SiteInfoBean.java EI=~*&t */ 7fqQ package NetFox; pnu?=.O qz-
tXc, k*_Gg public class SiteInfoBean { Sk
EI51] pwMA,X/{ OK4r) private String sSiteURL; //Site's URL 8K2 @[TE=5 private String sFilePath; //Saved File's Path W9l](Ow private String sFileName; //Saved File's Name 9{(q[C5m private int nSplitter; //Count of Splited Downloading File zgFL/a< 9ug4p'] ((Av3{05H& public SiteInfoBean() ]$#bNt/p {//nSplitter的缺省值为5 Dt!KgI3 //default value of nSplitter is 5 a)lCp this("","","",5); KxErWP% } :PV3J0pB~ S\ak(<X vcW(?4e public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) T}J)n5U}\ { wYe;xk`> sSiteURL= sURL; !{,2uQXe sFilePath = sPath; gIO_mJ3 u sFileName = sName; !>'A2V~F this.nSplitter = nSpiltter; $<nD-4p T0A=vh;S e
6wevK\ } 8'E7Uj `Cd! a{ke%W$*P public String getSSiteURL() - 5v{p { aAqM)T83 return sSiteURL; E4=D$hfq` } Cn=#oE8(A pzt<[; Tcv/EST public void setSSiteURL(String value) ]Ky`AG`2~ { #"oLz"{ sSiteURL = value; ,2U } 3u t<o- Mi
NEf ZUj1vf6I public String getSFilePath() +P+h$gQ { mS}.?[d" return sFilePath; L{1[:a)']B } Vo[.^0 8B+C[Q:+' Rt,po public void setSFilePath(String value) w_"-rGV { V:t{mu5j sFilePath = value; ]):>9q$C } d" 0&=/ *'?V>q, uMm`j?Y23q public String getSFileName() 'ahz@+lO { T+gH38!e return sFileName; 89KFZ[.}] } -ert42fN PB*G#2W d~6UJ=]@8 public void setSFileName(String value) *6][[)( { ~Hd* Xl sFileName = value; 4Q1R:Ra } }Q9+krrow yW*,Llb5 I\-M`^@ public int getNSplitter() 1Ke9H!_P { sUQ
Q/F6 return nSplitter; 7/KK}\NE } '
Qlj"U ;jQ^8S lSoAw-@At8 public void setNSplitter(int nCount) > Xij+tt{ { .=yv m nSplitter = nCount; ~$//4kES } BaUuDo/ZO } NYKYj`K <EE^ KR96 p<mBC2!% /* Gr}NgyT<!D **Utility.java Wwr */ zmu+un"\j package NetFox; ]
M#LB&Pe xh#pw2v7V ^xScVOdP public class Utility { _KT'W!7 9s7TLT k tnBCO%uG public Utility() 6f
t6;*, { E{^W- +~P_o_M tv~Y5e&8 } #Jp|Cb<qx +!:=Mm //线程睡眠 c/j+aj0.v public static void sleep(int nSecond) Q`;eI
a6U { @)!N{x? try{ D
dCcsYm, Thread.sleep(nSecond); [~G1Rz\h } BG.sHI{ catch(Exception e) ^
uwth { LCzeE7x e.printStackTrace (); .RAyi>\e } 3^$=XrD } > sQ&5-i ,&fZo9J9 //日志 s%>8y\MaK public static void log(String sMsg) 1{a4zGE?[ { 4M6[5RAW{ System.err.println(sMsg); Y" rODk1 } ;kR=vv wuk\__f4 GZn=Hgv8 public static void log(int sMsg) \}Iq-Je { %""h:1/S System.err.println(sMsg); 4gVIuF*pS } h^1!8oOYD } >p;&AaXkoG &RI;!qn6( =*zde0T?l /* $"MVr5q6 **TestMethod.java _V0%JE' */ .Y8P6_ package NetFox; ?Pf#~U_ Je2&7uR0 -xN/H,xok public class TestMethod { Xh3b=i|K d+ZXi' G-R83Orl public TestMethod() AGjjhbGB { ///xx/weblogic60b2_win.exe $<&_9T#&w try{ \i}-Y[Dg SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 2+C:Em0yI //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); q"DHMZB SiteFileFetch fileFetch = new SiteFileFetch(bean); W2zG"Q fileFetch.start(); D`'Cnt/ } MA}}w& catch(Exception e){e.printStackTrace ();} rl$"~/ oz "68X+! H8HVmfM } h+Yd
\k ~Eb:AC5 'O.f}m SS public static void main(String[] args) lFSvHs5 { 1w7XM0SHcn new TestMethod(); `g) } ".N{v1 } BSB&zp 点击下载更多相关资料
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