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/* k1VT /u **SiteFileFetch.java 9}z0J */ z"*/mP2 package NetFox; r!,}Z=cGe import java.io.*; ]tY
^0a import java.net.*;
xG;-bJu N25V] -gQCn>" public class SiteFileFetch extends Thread { :W@#) 1= P]z[v)} xnE|Umz SiteInfoBean siteInfoBean = null; //文件信息Bean f-nz{U long[] nStartPos; //开始位置 )/t?!T.[ long[] nEndPos; //结束位置 uytE^ FileSplitterFetch[] fileSplitterFetch; //子线程对象 R-^96fFBy long nFileLength; //文件长度 9M"].~iNE boolean bFirst = true; //是否第一次取文件 ~n}k\s~|4 boolean bStop = false; //停止标志 I5h[%T File tmpFile; //文件下载的临时信息 NAPX_B,6 DataOutputStream output; //输出到文件的输出流 2S' {!A US //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) KR"M/# public SiteFileFetch(SiteInfoBean bean) throws IOException oq*N_mP0
{ BPr^D0P siteInfoBean = bean; kF>o.uSV //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); (LHp%LaZ\; tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); DS|KkTy3 if(tmpFile.exists ()) Mc!Xf[ { Su 5>$ bFirst = false; fqu}Le read_nPos(); /k"`7`! } +/D>|loRC else Bvt@X { &F}"Z(B<wK nStartPos = new long[bean.getNSplitter()]; %6--}bY^ nEndPos = new long[bean.getNSplitter()]; <W]g2>9o9 } OCy0#aPRS :iR \% KN"S?i]X +y 87~]] } !`bio cA jp' K%P *._|- L public void run() ^s.V;R { #yI.nzA* //获得文件长度 #.[AK_S5& //分割文件 ASPy //实例FileSplitterFetch 5PcJZi^.l //启动FileSplitterFetch线程 >yJ9U,Y //等待子线程返回 Q%aU42?_1 try{ E+C5 h
;p& if(bFirst) `"@ X.}\ { {YUIMd!Y nFileLength = getFileSize(); 6dAEM;$_Z if(nFileLength == -1) 1}ZKc=Pfu { ob_I]~^I?| System.err.println("File Length is not known!"); |#l= } VOsqJJ3 else if(nFileLength == -2) )6~1 ^tD { K\XyZ System.err.println("File is not access!"); V#ev-\k}@ } P'MY[&|mM' else !se0F.K { i*R,QN) for(int i=0;i<nStartPos.length;i++) 1+`l7'F { 4lKVY< nStartPos = (long)(i*(nFileLength/nStartPos.length)); C6_@\&OA } "!K'A7.^ for(int i=0;i<nEndPos.length-1;i++) 5BR5X\f0 { ZDL']*)' nEndPos = nStartPos[i+1]; :ug4g6;#H0 } 27ckdyQx nEndPos[nEndPos.length-1] = nFileLength; hC_Vts[v/ } }B7K@Wu# } x( mE<UQN M\b")Tu{0 &/.hx(#d //启动子线程 0:KE@= fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; eK /?%t for(int i=0;i<nStartPos.length;i++) 4;`Bj:. { HmK*b Z fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), TgU**JN) siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), m\/(w_/? nStartPos,nEndPos,i); ;jK#[*y Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); U-wLt(Y< fileSplitterFetch.start(); b{DiM098 } 1G~S|,8p // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /RLq>#:h** siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); o
A*G // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", +5v}q.:+ nEndPos = " + nFileLength); 04!(okubyp // fileSplitterFetch[nPos.length-1].start(); {+zJI-XN/ mxwdugr` 6`\]derSon //等待子线程结束 ngulc v //int count = 0; ,(G%e //是否结束while循环
>95TvJ boolean breakWhile = false; 2}}?'PwwT 1-I
Swd'u 4"\yf while(!bStop) T)7TyE|"2g { !/K8xD$ write_nPos(); u%O-;>J Utility.sleep(500); ~c{:DM breakWhile = true; 2=PBxDs; :&'{mJW*{t FqA3{ for(int i=0;i<nStartPos.length;i++) VS?@y/\In { j&6 jRX if(!fileSplitterFetch.bDownOver) ]Gc3Ea;4 { ?3sT"r_d@ breakWhile = false; )He#K+[}^4 break; |c-LSs'\ } kR.wOJ7' } )Du-_Z if(breakWhile) b`cYpcs break; `NwdbKX ?BCy J 71B3a //count++; 5IMSNGS //if(count>4) >e5zrgV // siteStop(); v@ONo?) } o6j"OZcv ^[h2% c$ c|wCKn}` System.err.println("文件下载结束!"); MQcE6) } >L2*CV3p catch(Exception e){e.printStackTrace ();} coQ[@vu } [j6~}zu@ V*B0lI7`B ` DCU>bt&R //获得文件长度 {ctwo X[; public long getFileSize() bLG ]Wa { sV0Z int nFileLength = -1; l^ 4OC try{ ;?9A(q_Z URL url = new URL(siteInfoBean.getSSiteURL()); H$!-f>Rxa HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); +!&$SNLh( httpConnection.setRequestProperty("User-Agent","NetFox"); q
G;-o)h *d*oS7 M|CrBJv+F int responseCode=httpConnection.getResponseCode(); `ENP=kL(+ if(responseCode>=400) j)D-BK&+ { UC9{m252 processErrorCode(responseCode); cIw
eBDl return -2; //-2 represent access is error `!c,y~r[ } l=Wd,$\ <*@~n- R$ (-(*XNC String sHeader; nTZ> |R) (DJvi6\H PKtU:Eg for(int i=1;;i++) #4y,a_) { {;RF //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); L~MpY{!3 //Utility.log(in.readLine()); G*\sdBW!k sHeader=httpConnection.getHeaderFieldKey(i); jKt-~: if(sHeader!=null) &telCg: { ltEF:{mLe# if(sHeader.equals("Content-Length")) R#0{Wg0O) { RWE~&w G} nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ]V<"(?,K break; ]bfqcmh< } w`#fH } gB+
G'I else PRpE$`WK break; IxP^i{/1? } 2Guvze_bU } :Y.e[@!1x catch(IOException e){e.printStackTrace ();} ]31$KBC catch(Exception e){e.printStackTrace ();} + zDc nO_!:6o". !QTPWA Utility.log(nFileLength); ,I39&;Iq V Cf|`V~ G cj^bh return nFileLength; R9=K(pOT } uo 4xnzc :)LC gIQo U?EG6t //保存下载信息(文件指针位置) IozNjII$:. private void write_nPos() JjDS"hK# { BvI 0v: try{ ~>w:;M=sV8 output = new DataOutputStream(new FileOutputStream(tmpFile)); ".M:`BoW4 output.writeInt(nStartPos.length); /#IH-2N for(int i=0;i<nStartPos.length;i++) \4@a { -R74/GBg // output.writeLong(nPos); ]Da4.s*mW output.writeLong(fileSplitterFetch.nStartPos); >Qk97we'9 output.writeLong(fileSplitterFetch.nEndPos); a|z1K } S| "TP\o output.close(); 7?"9J`* } }6@%((9E2 catch(IOException e){e.printStackTrace ();} +Z$a1Y@ catch(Exception e){e.printStackTrace ();} `OLB';D } [U']kt }
Ab_o#Zy |DGCdB|`G //读取保存的下载信息(文件指针位置) EGEMZCdk2 private void read_nPos() ]]3Q*bq4 { Y)v% try{ g6`.qyVfz' DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); _]_L F[ int nCount = input.readInt(); qAbd xd[ nStartPos = new long[nCount]; 5 Af?Yxv nEndPos = new long[nCount]; klo^K9! for(int i=0;i<nStartPos.length;i++) 4NI'(#l { tB!|p 6 nStartPos = input.readLong(); BMF3XcH~G nEndPos = input.readLong(); JQr36U } $ JuLAqq input.close(); fW[_+r] } W -3w7^ catch(IOException e){e.printStackTrace ();} /:^tc/5U] catch(Exception e){e.printStackTrace ();} I>!|3ElT } 6XZN># eNivlJ,K|@ 8@Q"YA3d+ private void processErrorCode(int nErrorCode) `}ZL'\G { '2j~WUEmg System.err.println("Error Code : " + nErrorCode); Zq9>VqGe } )y5iH){! J (=4 m/cx|b3hqv //停止文件下载 :> x:(K public void siteStop() Scf.4~H 0 { x9TuweG bStop = true; aTi0bQW{ for(int i=0;i<nStartPos.length;i++) ^75pV%<% fileSplitterFetch.splitterStop(); @i\7k(9:A 0;'j!`l9 w:n(pLc< } A<]&JbIt } +~@7"
|d //负责部分文件的抓取 xMLrLXy **FileSplitterFetch.java yFIl^Ck% */ 7Z9.z4\ package NetFox; O#A8t<f|M hwc:@' 6Uch0xha! import java.io.*; -i2D#i' import java.net.*; oM-b96 #vnefIcBf 7O]J^H+7 public class FileSplitterFetch extends Thread { wbn^R' 9T?~$XlX $gXkx D String sURL; //File URL /vMQF+ long nStartPos; //File Snippet Start Position oD Q9.t long nEndPos; //File Snippet End Position X^u4%O[' int nThreadID; //Thread's ID VZAuUw+M boolean bDownOver = false; //Downing is over cu)@P 0I boolean bStop = false; //Stop identical
MYKs??]Y1 FileAccessI fileAccessI = null; //File Access interface AEi WL.*. )zo#1$C- yIn/Y 0No public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 8') .ohD { nD^{Q[E6= this.sURL = sURL; W*1d
X"S this.nStartPos = nStart; uZo]8mV this.nEndPos = nEnd; OaX HJ^k nThreadID = id; BXagSenc fileAccessI = new FileAccessI(sName,nStartPos);//定位 qiF@7i } k8!hvJ)? ^p{A!I! kxt\{iy4 public void run() ez{P-qB { ,<R>Hiwg/s while(nStartPos < nEndPos && !bStop) R
(+h)#![ { .aVHd<M 5]A$P\7~1 t?pIE cl try{ JNU"5sB URL url = new URL(sURL); [ flu|v HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); My'9S2Y8nv httpConnection.setRequestProperty("User-Agent","NetFox"); }Rf}NWU)| String sProperty = "bytes="+nStartPos+"-"; LZ=wz.'u httpConnection.setRequestProperty("RANGE",sProperty); <DA{\'jJ Utility.log(sProperty); r{;VTQ vWPM:1A r&H=i InputStream input = httpConnection.getInputStream(); [XA&&EcU //logResponseHead(httpConnection); GqmDDL1 A)O_es2 a+4`}:KA# byte[] b = new byte[1024]; Huc3|~9 int nRead;
ox i
a} while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop)
o>/uW8 { /6i Tq^.% nStartPos += fileAccessI.write(b,0,nRead); ,6y-.m7> //if(nThreadID == 1) \FY/eQ*07 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); AaCnTRG } \UkNE5 K#m\qitb n',9#I(!L Utility.log("Thread " + nThreadID + " is over!"); >S-N|uR6 bDownOver = true; S\yu%=h //nPos = fileAccessI.write (b,0,nRead); "G i+zkVm }
t?Njw7 catch(Exception e){e.printStackTrace ();} &"~,V6,q } DRKc&F6Qy } vkNZ -`+I 9^b7jw L:k@BCQM //打印回应的头信息 $w";*">:0 public void logResponseHead(HttpURLConnection con) ur~Tql { @@&@}IQcR1 for(int i=1;;i++) ?-(w][MT\ { .5Z,SGBf String header=con.getHeaderFieldKey(i); 5W:Gl?$S} if(header!=null) kcma/d //responseHeaders.put(header,httpConnection.getHeaderField(header)); ~,M;+T}[r Utility.log(header+" : "+con.getHeaderField(header)); b6?Xo/lJ. else jiw`i break; g# 9*bF } mTb2d?NS } m\}\RnZu (Ay4B*|! >gS5[`xRE public void splitterStop() RJ`/qXL { pO 7{3% bStop = true; tswG"1R } p[k9C$@e} JUaKj@a| Tg{dIh.Q~O } !,-qn)b .x-Z+Rs{g [w#x5Xsn /* RL]lt0O{ **FileAccess.java ?G%, k
LJJ *//文件访问(定位,写) [<3Q$*Ew package NetFox; u=ds]XP@ import java.io.*; Sj]T{3mi Tr}$Pb1 |]]pHC_/W public class FileAccessI implements Serializable{ Um0<I) vI:bl~ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 V"Y
Fu^L RandomAccessFile oSavedFile; ][>M<J long nPos; C}DG'z9 J?,!1V= "=Fn.r4I public FileAccessI() throws IOException zf!\wY"` { MkV*+LXC this("",0); OD@@O9 } 5+Zx-oWq_ ;HLMU36q BoiIr[ ( public FileAccessI(String sName,long nPos) throws IOException Y[8co<p { krnk%ug oSavedFile = new RandomAccessFile(sName,"rw"); +EB,7<5< this.nPos = nPos; da86Jj=k oSavedFile.seek(nPos); wGQ hr=" } WUOPYYW<o }zfLm`vJ t%YX-@ public synchronized int write(byte[] b,int nStart,int nLen) 0f#a_ { jiB>.te int n = -1; Z_4H2HseL try{ '8pPGh9D oSavedFile.write(b,nStart,nLen); -9<yB n = nLen; ^[?+=1
k } Kd[`mkmS catch(IOException e) (LvOsr~ { @aPu}Hi e.printStackTrace (); Vi-!E } !vo '8r?& ZtK%b+MBP U@t?jTMBkO return n; "E[*rnsLN } 6%hEs6-R -0J<R;cVs D30Z9_^%: } 1X_!%Z 9C'+~<l `&Of82*w /* `r0
qn'* **SiteInfoBean.java q}24U3ow */ &l}xBQAL package NetFox; (a4y1k t- D2*Q1n =d4',[O public class SiteInfoBean { g:6}zHK 5}^08Xl LFM5W&? private String sSiteURL; //Site's URL D@1^:'$V private String sFilePath; //Saved File's Path [-94=|S @ private String sFileName; //Saved File's Name gl{PLLe[} private int nSplitter; //Count of Splited Downloading File (V%vFD1) GN"LU>9| T`0gtSS public SiteInfoBean() uC ;PP=z {//nSplitter的缺省值为5 l8Iy03H //default value of nSplitter is 5 +A3\Hj&W this("","","",5); iP\&fZY_ } RpXG gw !_z>w6uR
$W]guG public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) -r0\ { y/*Tvb #TJ sSiteURL= sURL; >bP7}T sFilePath = sPath; >!.lr9(l sFileName = sName; &zDFf9w2{ this.nSplitter = nSpiltter; @uD{`@[ _;RD-kv gM[
J'DMW } 1ORi]` 8pt<)Rs} ~g|0uO}. public String getSSiteURL() #EK8Qe_ { >V=@[B(0 return sSiteURL; m&c(N } $ =a$z" nM}`H'0 A{T@O5ucj public void setSSiteURL(String value) k(Xv&Zn { 'UCx^- sSiteURL = value; UoT}m^ G } 6u3(G j@ [:'?}p ExU|EN- public String getSFilePath() *%+buHe { ee[NZz return sFilePath; y{P9k8v!z } HBGA
lZ '0rwNEg 5!p'n#_ public void setSFilePath(String value) ZO$T/GE6% { !Hj)S](F sFilePath = value; ?E@[~qq_ } xM,(|p( XmR5dLc8 m(]IxI public String getSFileName() %*}f<k{6 { zwK;6&(W return sFileName; ~]+
jn } 2 ZXF_ o d'D\#+%>= {627*6, public void setSFileName(String value) iP_Xr~w { E.9k%%X] sFileName = value; cNvcpv } _@76eZd feHAZ.8rp+ YNk|UwJi public int getNSplitter() I ^92b { X.|0E87 return nSplitter; ;Nij*-U4~ } y$NG ..S 4+bsG6i !-~(*tn public void setNSplitter(int nCount) pdq h'+5 { `^{P,N>X nSplitter = nCount; ZeV)/g,w } X|G+N(`|( } z6(Q
3@iO lNAHn<ht r U5'hK
/* 7C^ nk
z **Utility.java Y.#+Yh[ */ ^Yz05\ package NetFox; b*fflJ iq-o$6Pg OK(d& public class Utility { {Wo7=aR \$"Xr wYG0*!Vj public Utility() k*^W
lCZ3 { Pq%cuT% Z]d]RL&r iSHl_/I< } dW68lVWq_ YvX I //线程睡眠 3R {y68-S public static void sleep(int nSecond) *Cw2 h { wt;aO_l try{ gG>>ynn Thread.sleep(nSecond); g (k|"g`* } 7/L7L5h< catch(Exception e) T:$_1I $ { wP*Z/}Uum+ e.printStackTrace (); KHtY
+93 } ^cm^JyS) } zdE^v{}| oDa{HP\O]W //日志 /jD'o> public static void log(String sMsg) 4aC#Cv:0 { X $f%Ss System.err.println(sMsg); J7xmf,76w } stPCw$@ bSfQH4F tw66XxE public static void log(int sMsg) jL SZ#H { x#D=?/~/Kv System.err.println(sMsg); 5,C,q%2 } 7}k8-:a% } }|,y`ui\ Hik[pVK@ v&n&i? /* oWmla*nCKL **TestMethod.java z{\.3G */ 4KCxhJq package NetFox; $]FWpr%) VM[8w` `Nj|}^A public class TestMethod { _q 8m$4 DZue.or GSp1,E2J public TestMethod()
<T).+
M/ { ///xx/weblogic60b2_win.exe \+xsJbEV try{ _Gu ;U@ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); fvDwg //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); rzu^br9X SiteFileFetch fileFetch = new SiteFileFetch(bean); ;Peyo1 fileFetch.start(); Lmb<)YY } 2xX7dl(cC catch(Exception e){e.printStackTrace ();} y.zQ ` Ty=}A MMyE <mN3:G } E'Bt1u @lwqkJ qb Q> z+c public static void main(String[] args) y_6HQ: { G;e}z&6<k new TestMethod(); V;"'!dVX } cnR>)9sX } "q$M\jK#V 点击下载更多相关资料
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