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/* diD[/&k#kh **SiteFileFetch.java qw}.
QwPT */ ]ujXPK=t package NetFox; [*^rH: import java.io.*; 2;`WI:nt import java.net.*; #P;vc{ Iq
u'qc=5 m4RiF public class SiteFileFetch extends Thread { x1`zD*{ E\*M4n\! @_Es|(4 SiteInfoBean siteInfoBean = null; //文件信息Bean {{ +8oRzY long[] nStartPos; //开始位置 #EIcP=1m4 long[] nEndPos; //结束位置 fU^5Dl FileSplitterFetch[] fileSplitterFetch; //子线程对象 TS@U0Ror long nFileLength; //文件长度 iKA qM{( boolean bFirst = true; //是否第一次取文件 FUs57
V boolean bStop = false; //停止标志 PQ(/1v File tmpFile; //文件下载的临时信息 t^8|t(Lq DataOutputStream output; //输出到文件的输出流 3'6by!N,d tiTh7qYi9 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Y>I9o)KR public SiteFileFetch(SiteInfoBean bean) throws IOException M b(hdS90 { 2R~[B]2"r siteInfoBean = bean; (n4Uc308 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); &f<Ltdw tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); &-p!Lg&D if(tmpFile.exists ()) `l+9g"q { .'=-@W* bFirst = false; \Vl)q>K_h read_nPos(); xH{V.n&v } ##/ l else gwN
y]! { X{;5jnpG nStartPos = new long[bean.getNSplitter()]; !b'!7p
nEndPos = new long[bean.getNSplitter()]; (]sk3
A } G'WbXX m";?B1%x 'Jl3%axR 15"[MX A } D<(VP{,G JJu}Ed_ (zIF2qY public void run() e)A{
{wD/ { s5u //获得文件长度 0l~z0pvT //分割文件 :0(:}V3 z\ //实例FileSplitterFetch CC XOxd //启动FileSplitterFetch线程 ;-!O+c //等待子线程返回 -ei+r# try{ [<IJ{yfx if(bFirst) !-s 6B { uEDvdd#V. nFileLength = getFileSize(); >(eR0.x if(nFileLength == -1) [_zoJ { RbJbVFz8C System.err.println("File Length is not known!");
W>m#Mz } 8t1,_,2' else if(nFileLength == -2) iS}~e{TP/ { a\Dw*h?b~ System.err.println("File is not access!"); 0m'tPFQ| } !l~3K(&4 else i2n66d { +M.!_2t$2 for(int i=0;i<nStartPos.length;i++) 'T*h0xX { ~0Xx] nStartPos = (long)(i*(nFileLength/nStartPos.length)); f4&k48Ds } },vVc/ for(int i=0;i<nEndPos.length-1;i++) P*9L3R*=N {
nIv/B/>pZ nEndPos = nStartPos[i+1]; F/0x`l } #5mnSky+s nEndPos[nEndPos.length-1] = nFileLength; *","u;& } Mx=L lC) } ,=y8[(h UjH+BC+9`b <R8!fc{` //启动子线程 lBfG#\rdW~ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; J]qx4c for(int i=0;i<nStartPos.length;i++) hdurT { ~A-VgBbU>_ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~+O ws siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), x).`nZ1 nStartPos,nEndPos,i); bb"x^DtT Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ,[)f-FmcU fileSplitterFetch.start(); uqK[p^{ } [C( >e0r // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), xZp`Ke! siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Rb_+C // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", c4xXsUBQk nEndPos = " + nFileLength); A.(xa+z? // fileSplitterFetch[nPos.length-1].start(); h/\/dp/tt >y^zagC* If%**o //等待子线程结束 1}b1RKKj< //int count = 0; ]|)M /U * //是否结束while循环 _dynqF8* boolean breakWhile = false; VU(#5X%Pn hwdZP=X LOlj8T8Z while(!bStop) >;OwBzB { pQOT\- bD write_nPos(); (S
k+nD Utility.sleep(500); _-bEnF+/0 breakWhile = true; \%/zf 6'QlC+E 1J O@G3, for(int i=0;i<nStartPos.length;i++) 4-{f$Z@ { \_PD@A9 if(!fileSplitterFetch.bDownOver) 6yPh0n { WU<C7 breakWhile = false; b5d;_-~d break; r[y3@SE5 } oM)4""| } -MT.qhx if(breakWhile) 3hbUus break; ]^?V8*zL] b1frAA ^+q4* X6VB //count++; 8WL*Pr1I //if(count>4) o9L$B // siteStop(); 5sK1rDN } :} 9Lb)Yp DJ<F8-sb2r 0FEn& \2< System.err.println("文件下载结束!"); hNGD`"U } ;mLbgiqQ J catch(Exception e){e.printStackTrace ();} =9'px3:'WR } `]\:%+- T1c.ER}17 jq"iLgEMO //获得文件长度 |_`wC public long getFileSize() 5W~-|8m { aO>Nev int nFileLength = -1; >KMTxHE`+ try{ 0I
\l_St@ URL url = new URL(siteInfoBean.getSSiteURL()); TNK~ETE4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); o? {rPFR httpConnection.setRequestProperty("User-Agent","NetFox"); 0xe*\CAo kmfxk/F} u&s>UkR int responseCode=httpConnection.getResponseCode(); GK-__Y. if(responseCode>=400) b_xGCBC { k>dzeH processErrorCode(responseCode); )A H)*Mg return -2; //-2 represent access is error C'Z6l^{> } 9q|36CAO_ E]IPag8C ;L.RfP"5< String sHeader; !w-`:d? YR}
P; (jB_uMuS for(int i=1;;i++) -Rz%<` { biw2f~V //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); [n{c, U
F //Utility.log(in.readLine());
*^b<CZd9 sHeader=httpConnection.getHeaderFieldKey(i); ;fnE"} if(sHeader!=null) "=ogO/_Q" { 8{iFxTz if(sHeader.equals("Content-Length")) { WW!P,w { N
J_#;t#j nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); tyyfMA?'L; break; ww(. } 5u3SP?.& }
]6 ]Nr else &H<n76G break; M<"H1>q@ } e[AwR?= } xfJ&11fG2 catch(IOException e){e.printStackTrace ();} Z>+Tzvfud catch(Exception e){e.printStackTrace ();}
ra*(.<& TScI_8c> C=|X]"*:u0 Utility.log(nFileLength); /WX
0}mWu 6}9`z8 Ko|p&-Z; return nFileLength; _pS!sY~d } 7y2-8eL fPLi8`r Q N$Ac.F //保存下载信息(文件指针位置) xIh,UW# private void write_nPos() x%\m/_5w% { Kgw_c:/' try{ s$ v<p(yl output = new DataOutputStream(new FileOutputStream(tmpFile)); "P_PqM output.writeInt(nStartPos.length); G)'(%rl for(int i=0;i<nStartPos.length;i++) ;$= GrR { 2%F!aeX // output.writeLong(nPos); N)H
_4L output.writeLong(fileSplitterFetch.nStartPos); ek3,ss3 output.writeLong(fileSplitterFetch.nEndPos); HD&Ag } 4`mF6%UC output.close(); -w#Hy>E } ?c!W*`yP catch(IOException e){e.printStackTrace ();} auKGm: catch(Exception e){e.printStackTrace ();} +zup+=0e } '7Aj0U( ID1/N)56 iig ({b //读取保存的下载信息(文件指针位置) 0 `L>t private void read_nPos() ?6[X=GeUs { c3NUJ~>=y try{ sF=8E8qa DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); D+:} D*_& int nCount = input.readInt(); etHkyF nStartPos = new long[nCount]; JIobs*e0m nEndPos = new long[nCount]; x\m?* 5p for(int i=0;i<nStartPos.length;i++) HECZZnM { r{~@hd'Aj nStartPos = input.readLong(); y$n`+%_ nEndPos = input.readLong(); O%n =n3 } DKGZm<G> input.close(); 9:l@8^_o } ^%:syg_RM[ catch(IOException e){e.printStackTrace ();} ==z,vxr catch(Exception e){e.printStackTrace ();} 6+;B2;*3 } c8
xZT d].(x)|st pd1V8PZSG private void processErrorCode(int nErrorCode) #g6*s+Gm { KW~fW r8 System.err.println("Error Code : " + nErrorCode); vKvT7Zxc } /EpsJb`kj 2]f"(X4jp (.DX</f/4 //停止文件下载 H!+T2<F9R public void siteStop() x$'0}vnT { tbP
;iK' bStop = true; [qEd`8V( for(int i=0;i<nStartPos.length;i++) ~!Q\\_ fileSplitterFetch.splitterStop(); lN-[2vT< !] -ET7 V u`O%[Q/ } BVt)~HZ } c!{]Z_d\ //负责部分文件的抓取 QE8aYPSFf **FileSplitterFetch.java IO4 8sV } */ < x==T4n/ package NetFox; 34$qV{Y%y @9wug!, ;1&7v import java.io.*; bz=B&YR import java.net.*; 8+irul{H_ 5ma*&Q8+ A]FjV~PB public class FileSplitterFetch extends Thread { #q5
L4uM9 3~%wA(|A ?l3PDorR String sURL; //File URL sBo|e]m# long nStartPos; //File Snippet Start Position w53+k\. long nEndPos; //File Snippet End Position '*PJ-=G int nThreadID; //Thread's ID r^$4]@Wn boolean bDownOver = false; //Downing is over dIUg
e`O9 boolean bStop = false; //Stop identical k7\h- yn{ FileAccessI fileAccessI = null; //File Access interface :&/b}b!)AX *
@QC:1k /4R|QD public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException '{t&!M` { 'z=QV {ni this.sURL = sURL; hu
G]kv3F: this.nStartPos = nStart; ;U^7]JO; this.nEndPos = nEnd; 5ecAev^1- nThreadID = id; TZ]D6.mD fileAccessI = new FileAccessI(sName,nStartPos);//定位 O'G, } ft"B, yE \dv)(< z}" Xt=G? public void run() uH 6QK\ { oA _,jsD4 while(nStartPos < nEndPos && !bStop) }h6N.vz { {bSi3 oI B[]v[q< KV!!D{VS`@ try{ whzV7RT URL url = new URL(sURL); Z|z+[V}[ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); `qjiC>9 httpConnection.setRequestProperty("User-Agent","NetFox"); A7;|~?? String sProperty = "bytes="+nStartPos+"-"; FTihxC?.L httpConnection.setRequestProperty("RANGE",sProperty); jM E==)Y Utility.log(sProperty); 1i.t^PY <R6$ kom` Rw54`_kFEB InputStream input = httpConnection.getInputStream(); <oE(I)r4, //logResponseHead(httpConnection); UY_'F5X !1:364 {hr+ENgV byte[] b = new byte[1024]; Wa8?o~0"L int nRead; 0 ;b%@_E while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) J(\]3 9y { m|RA@sY%` nStartPos += fileAccessI.write(b,0,nRead); p.gaw16}> //if(nThreadID == 1) \s.c.c*eh; // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Y+k)d^6r } /uc*V6Xd
( ?E@9Nvr )_bR"!Z Utility.log("Thread " + nThreadID + " is over!"); O~r.sJ} bDownOver = true; +~6gP! //nPos = fileAccessI.write (b,0,nRead); Wm5/>Cu, } gCMwmanX catch(Exception e){e.printStackTrace ();} @q?zh'@; } O>=D1no* } %CxrXU S}=euY'i .H,wdzg) //打印回应的头信息 `XwFH#_ public void logResponseHead(HttpURLConnection con) KT)A{i { (Ut)APM for(int i=1;;i++) FQbF)K~e { +$eEZ;4 String header=con.getHeaderFieldKey(i); Yxal% if(header!=null) xp395ub6 //responseHeaders.put(header,httpConnection.getHeaderField(header)); .@Z-<P" Utility.log(header+" : "+con.getHeaderField(header)); fE\;C bi else UqaLTdYG break; %n3lm(-0U } m17H#!` } {%S>!RA "g)@jqq:> p&nIUx" public void splitterStop() g,5r)FU` { qL6Rs bStop = true; u0;FQr2 } xZ*.@Pkr 7R 40t3 ( aGwe@AS } 1!@KRV Zd/ACZ[ cG|ihG5) /* 8+Y+\XZG **FileAccess.java .[v4'ww^ *//文件访问(定位,写) ,8KD-" l^g package NetFox; 0L
"+, import java.io.*; PKoB~wLH zCdQI ~aK@M4 public class FileAccessI implements Serializable{ Wx;`=9 /7$3RV( //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 s
V70a3# RandomAccessFile oSavedFile; ! 5rja-h long nPos; SBnwlM"AN 0ciPH:V Yg5m=Lis public FileAccessI() throws IOException wG1A]OJl1 { kI>Iq
Q-h this("",0); F d:A^] } -saisH6 sv<U$M~)X yq{k:) public FileAccessI(String sName,long nPos) throws IOException QGtKu:c.81 {
'CqWF" oSavedFile = new RandomAccessFile(sName,"rw"); \vBpH'hR,' this.nPos = nPos; #tyHj k oSavedFile.seek(nPos); S!0ocS!t } 5*=a*nD11 [vuqH:Ln .JNU3%s public synchronized int write(byte[] b,int nStart,int nLen) fmDU { fqaysy int n = -1; 5>J{JW| try{ A^PCI*SN[ oSavedFile.write(b,nStart,nLen); CD\k. n = nLen; ]XX8l:+ } BJgg-z{Y catch(IOException e) IS;F9{ { [KIK}: e.printStackTrace (); _y Q* } Pdc- 3 p?OwcMT]M WN?1J4H return n; Y[=Gv6Fr } S/j~1q_|G 8U8l
5r uf;^yQi } $9v:(:!Bm y6|&bJ @ T<*i($
[ /* ~Uw**PT3M **SiteInfoBean.java 6,j6,Q(67 */ JO:40V?op package NetFox; k^3|A3A `3!ERQU 38IVSK_ public class SiteInfoBean { #t
/.fd {K-]nh/ 9Ny{2m=Ye private String sSiteURL; //Site's URL \~4uEk"] private String sFilePath; //Saved File's Path V#;6<H" private String sFileName; //Saved File's Name H
R$\jJ private int nSplitter; //Count of Splited Downloading File &P>wIbE k>
I;mEV Cj?X+#J/@d public SiteInfoBean() HH[b1z2D {//nSplitter的缺省值为5 (`}O!;/E} //default value of nSplitter is 5 .@#i this("","","",5); " &B/v"nj } ,fQc0gM=[ lc/q0 g2b%.X4 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 0 r=:l/Pz { Y|FJ1x$r sSiteURL= sURL; l^x5m]Kt sFilePath = sPath; DXj_\ R(} sFileName = sName; /[YH
W] this.nSplitter = nSpiltter; MF/359r)Et Ob+L|FbnN EB'(%dH } 24_F`" :-= g_Wf3o857J 8M m,a public String getSSiteURL() S/CT;M@W { "WOY`su> return sSiteURL; Pb$ep|`u } ai% fj* 7MreBs(M vKppXm1 public void setSSiteURL(String value) 1_uq46 { hPt(7E2ke~ sSiteURL = value; ]qCAog } +D|y))fE uGl+"/uDu yu~~"Rq) public String getSFilePath() rt]
@Z`w { [nBlHI;& return sFilePath; mT\!LpX } Gu Msw*{> k WYjqv ~JY<DW7 public void setSFilePath(String value) zm rQ7(y { IH?.s
k
sFilePath = value; F,^Q'$! } H aI ou6|;*>d IbAGnl { public String getSFileName() $-9m8}U(Y { R?g
qPi- return sFileName; UPgjf } Riid,n RrSo`q-h+
C,:3z public void setSFileName(String value) Oa=0d;_ { o|G.tBpKg sFileName = value; @qH{; } ?g2Wu0< Gc}d#oo*k aloP@U/\Sn public int getNSplitter() D^P_3
B+ { w~sr2;rp< return nSplitter; PNgj 8J4 } ZiodJ"r DPIiGRw >_h*N H public void setNSplitter(int nCount) vsg"!y@v { v0`E
lkaN nSplitter = nCount; p;Kw$fQ? } *b9=&:pU( } R+IT)2 gTZ1LJ '~A~gK0 /* n?vrsqmZ **Utility.java ~0r:Wcj x */ bY7d package NetFox; K:/%7A_{ 5=/H2T!F i[A$K~f public class Utility { ,o\vumx Yd:8iJA fLl~a[(5 public Utility() ai[st+1 { "#^11 o8 4Y8/>uL A?'Tigi } 9r!psRA:`) <<K G S //线程睡眠 EX UjdJs" public static void sleep(int nSecond) mu0ER 3o { ;_),?( try{ jI!}}K)d Thread.sleep(nSecond); wN8-Me } Hj"`z6@7 catch(Exception e) _c?&G` { g|8G!7O e.printStackTrace (); jV`xRjh } HYf&0LT<11 } 0t?: ax&, //日志 $5T3JOFz public static void log(String sMsg) _!kL7qJ" { %{g<{\@4(; System.err.println(sMsg); n#,|C`2r } 1foy.3g- .<j\"X( C]K|;VQ public static void log(int sMsg) lO>w|=< { -kT *gIJ} System.err.println(sMsg); j-@3jFu } }N!I|<"/ }
ju`x x;2tmof=L u{maE , /* 4~=/CaG~ **TestMethod.java Q)S0z2 */ $+qJ#0OE$ package NetFox; 0q(}n v EOWLGleD1 pme5frM| public class TestMethod { 'v iF8?_ k\X1`D}R sui3(wb public TestMethod() q"4{GCavN { ///xx/weblogic60b2_win.exe <5
G+(vP try{ #-kG\} SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Sb I %| //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); rAq2 SiteFileFetch fileFetch = new SiteFileFetch(bean); p5&:>> fileFetch.start(); +m kub}<a } (mIw3d8Tz catch(Exception e){e.printStackTrace ();} AdDlS~\? 'H-: >'k nn!W-Bsqjh } &OD)e@Tc E!w%oTx{OR H@o3u>} public static void main(String[] args) Ha{# { ^%tmHDNL. new TestMethod(); G$&SlJZEk } +@>K]hdr } 9T#d.c24 点击下载更多相关资料
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