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/* _;(`u!@/{ **SiteFileFetch.java }P(RGKQZ" */ z%$ E6Im package NetFox; oFM\L^Y?$$ import java.io.*; psyxNM=dN# import java.net.*; 7ksh%eV IhnHNY]<g 7K.&zn public class SiteFileFetch extends Thread { YL-/z4g Z?X0:WK Mx{VN
P SiteInfoBean siteInfoBean = null; //文件信息Bean o|Cq#JFG long[] nStartPos; //开始位置 OzY55 long[] nEndPos; //结束位置 Fd Ezt FileSplitterFetch[] fileSplitterFetch; //子线程对象 Atsi}zTR\ long nFileLength; //文件长度 jXA!9_L7 boolean bFirst = true; //是否第一次取文件 W9n0Jv boolean bStop = false; //停止标志 gw~%jD-2 File tmpFile; //文件下载的临时信息 bHVAa# DataOutputStream output; //输出到文件的输出流 (uW/t1 qcMVY\gi //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) i; Cs,Esnf public SiteFileFetch(SiteInfoBean bean) throws IOException pm$2*!1F( { K*iy ^} siteInfoBean = bean; ,<?iL~> % //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); d\aKGq;8C tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); u>c\J|K_V if(tmpFile.exists ()) 9rXbv4{ { ^2f'I iE bFirst = false; 7jvy]5y8&~ read_nPos(); 8 2qf7` } NbOeF7cq+ else j1_ E^ { j,%@%upM nStartPos = new long[bean.getNSplitter()]; xw_VK1 nEndPos = new long[bean.getNSplitter()];
h4rIt3` } vvA=:J4/i) (t&]u7Atr +Go(yS S\fEV" } !`5[(lm VD[x}8ei Yhdt"@;.. public void run() 79 zFF { HT]W2^k //获得文件长度 L%](C //分割文件 n8<o*f&&9> //实例FileSplitterFetch 1d/-SxhZ //启动FileSplitterFetch线程 i9Fg //等待子线程返回 'J^ M`/ try{ *hVbjI$ if(bFirst) \b{Aj,6, { Jf\lnJTyU8 nFileLength = getFileSize(); 5G .Fi21
b if(nFileLength == -1) iVq4&X_x { XL[/)lX{ System.err.println("File Length is not known!"); { 3``T o$ } _&S?uz m else if(nFileLength == -2) Bvzu{B% { }e3M5LI1L System.err.println("File is not access!"); blxAy } #Mo`l/Cwp else Ol ,;BZHc\ { cBf9-k for(int i=0;i<nStartPos.length;i++) \PS{/XK { 3wXmX nStartPos = (long)(i*(nFileLength/nStartPos.length)); >)ZX
} x_9<&Aj6 for(int i=0;i<nEndPos.length-1;i++) -r/G)Rs { <>aBmJs4 nEndPos = nStartPos[i+1]; 5 e:Urv77 } )6|7L)Dk nEndPos[nEndPos.length-1] = nFileLength; `(A6uakd } =PHl|^ } X!5N2x b i^h&H _`lj
3Lm0> //启动子线程 g*b
4N_ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 9 tZ)#@\ for(int i=0;i<nStartPos.length;i++)
#.O,JG#H { :T~Aa(%( fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), l@`D;m siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), MWf ]U nStartPos,nEndPos,i); V~LZ%NZ8 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); YArNJ5z= fileSplitterFetch.start(); 1|Y(XB^os( } w+VeT @ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 8+vZ9!7 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ?]gZg[ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", @C)O[&Sk nEndPos = " + nFileLength); lhg3
}dW // fileSplitterFetch[nPos.length-1].start(); tB.;T0n ".L+gn}u- j`^':! //等待子线程结束 Wz$%o'OnC //int count = 0; n<MMO=+bg //是否结束while循环 A(duUl~ boolean breakWhile = false; `}o4 &$ ~^/zCPy[w J5L P#o(V while(!bStop) ja$>>5<q { WujIaJt- write_nPos(); L/(e/Jalg Utility.sleep(500); (^GVy= breakWhile = true; Myss$gt} <B
5^ 8>x.zO_.c> for(int i=0;i<nStartPos.length;i++) N_<sCRd]9 { /H.QGPr if(!fileSplitterFetch.bDownOver) \3K 6NA!L { U`q[5U" breakWhile = false; ^B@4 w\t break; k*|dX.C: } 2rHw5Wn]~ } EQPZV
K/ if(breakWhile) iU^ 4a break; -Nmf}`_ ANSv ZqKh dsDoPo0! //count++; .;WJ(kB\U //if(count>4) vl$! To9R" // siteStop(); mFayU w } Bp\io$(% IWu^a w vZ
4Z+;. System.err.println("文件下载结束!"); O%9Cq}* } )DMu`cD catch(Exception e){e.printStackTrace ();} #%VprcEK } <mHptgd, X@ +:O-$ &n<jpMB //获得文件长度 |Ix6D public long getFileSize() x$CpUy{6 { oT
8
int nFileLength = -1; Td[w<m+p<P try{ Ga f/0/| URL url = new URL(siteInfoBean.getSSiteURL()); 0 w\X HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); DjOFfD\MF httpConnection.setRequestProperty("User-Agent","NetFox"); B0=:A mDE{s",q/ 9BI5qHEp int responseCode=httpConnection.getResponseCode(); 4 E3@O if(responseCode>=400) ,- ]2s_ { {+c/$4< processErrorCode(responseCode); )$q<"t\#P# return -2; //-2 represent access is error 1E$Z]5C9 } xy mK| 2`5(XpYe f<SSg*A; String sHeader; jbIWdHZ/US NOyLZa' oE#HI2X for(int i=1;;i++) %fP^Fh { UQ|0Aqwq //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 6AUzS4O //Utility.log(in.readLine()); U]vNcQj sHeader=httpConnection.getHeaderFieldKey(i); (m;P,* if(sHeader!=null) lk.Q6saI1 { 3JW9G04. if(sHeader.equals("Content-Length")) t{~"vD9Am { #a#~YSnG nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); n_Um)GI> break; x(}t r27o } 0IDHoNaT< } ^e@c
Ozt else 1bzPBi break; CyG @ } bG^eP:r } `m2F.^qrr catch(IOException e){e.printStackTrace ();} 6 /4OFvL1 catch(Exception e){e.printStackTrace ();} tB(Q-c uzp!Y&C W[^XG\ Utility.log(nFileLength); u"T5m d,<ctd 4]
? return nFileLength; \!cqeg*53 } hNx`=D9[7 1MB u x:,io //保存下载信息(文件指针位置) )>\Ne~% private void write_nPos() Q]6nW[@j' { ?'T>/<( try{ $Fr2oSTT) output = new DataOutputStream(new FileOutputStream(tmpFile)); NmB0CbB output.writeInt(nStartPos.length); !Z=`Wk5 for(int i=0;i<nStartPos.length;i++) g<,v2A { Eq.c;3 // output.writeLong(nPos); Tr@`ozp8 output.writeLong(fileSplitterFetch.nStartPos); ?5B}ZMW output.writeLong(fileSplitterFetch.nEndPos); AO']Kmm } a*SJHBB output.close(); qsJA|z&6x } QJ"Bd`wc catch(IOException e){e.printStackTrace ();} vpXS!o>/Sn catch(Exception e){e.printStackTrace ();} 2YwV} }
5j]}/Aq dDpe$N N#,4BU //读取保存的下载信息(文件指针位置) ORtl~V' private void read_nPos() |qI_9#M\( { m7M*)N8 try{ =,T~F3pK DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); #v&&GuF int nCount = input.readInt(); ;U20g:K nStartPos = new long[nCount]; W{-N,?z nEndPos = new long[nCount]; f2{4Y) for(int i=0;i<nStartPos.length;i++) :nwcO3~` { G uDus2#+ nStartPos = input.readLong(); }1_gemlf
nEndPos = input.readLong(); Wb4sfP_ } c&0IJ7fZG input.close(); l>=c] } 9 l,Gd catch(IOException e){e.printStackTrace ();} *\joaw catch(Exception e){e.printStackTrace ();} vxqMo9T } Szg<;._J #Jm_~k '|]zBpz private void processErrorCode(int nErrorCode) 8tdUnh%/ { sWX System.err.println("Error Code : " + nErrorCode); P%/+?(? } "V9!srIC RisrU *K+*0_ //停止文件下载 G %#us3x public void siteStop() F5MWxAS,> { s#d# *pgzh bStop = true; ZnJnjW PQ for(int i=0;i<nStartPos.length;i++) x(t}H8q fileSplitterFetch.splitterStop(); '6xn!dK VS}Vl gH_r'j } +- .BF"} } 1%-?e``. //负责部分文件的抓取 MiSFT5$v6 **FileSplitterFetch.java Ab(bvS8r$ */ mR0@R;,p package NetFox; (+^1'?C8 +m+HC(Z W:) M}}&H import java.io.*; [{ zekF~)@ import java.net.*; +6;OB@ #);
6+v D:F!;n9 public class FileSplitterFetch extends Thread { |RjjP 7 Br yMq ! {K|{a String sURL; //File URL }F3Z~ long nStartPos; //File Snippet Start Position lhjPS!A~ long nEndPos; //File Snippet End Position ]3I_H+hU int nThreadID; //Thread's ID tjTF?>^6| boolean bDownOver = false; //Downing is over ';lO[B boolean bStop = false; //Stop identical u#P7~9ZG- FileAccessI fileAccessI = null; //File Access interface sV*Q8b*
A{c6XQR~z ,%jJ
,G, public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException -#i%4[v { nut7b this.sURL = sURL; K3Xy%pqR# this.nStartPos = nStart; S\X_!| this.nEndPos = nEnd; un/eS-IIh nThreadID = id; N&ddO-r[s fileAccessI = new FileAccessI(sName,nStartPos);//定位 0SDCo\ } au7BqV!uL I3L1|! 7dakj>JM public void run() )l"0:1I g { },"g* while(nStartPos < nEndPos && !bStop) '*-SvA\Cx { +amvQ];?Q8 %EpK=;51U K:Ap|F try{ vd;wQ URL url = new URL(sURL); Wu}Co HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ._R82gy httpConnection.setRequestProperty("User-Agent","NetFox"); "d#s|_n,d) String sProperty = "bytes="+nStartPos+"-"; #zQkQvAT9 httpConnection.setRequestProperty("RANGE",sProperty); rvG qUmSUs Utility.log(sProperty); cK258mY NMDNls&)k t #AQD]h InputStream input = httpConnection.getInputStream(); Iq5F^rH`[ //logResponseHead(httpConnection); U-k;kmaj |'J3"am' i3GvTg-X byte[] b = new byte[1024]; ;'Y?wH[ int nRead; -@73" w/ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) cn#a/Hx { yO($KL+ nStartPos += fileAccessI.write(b,0,nRead); 5 4OYAkPCk //if(nThreadID == 1)
V|D;7 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); nJ? C 4\#3 } 4a 5n*6G! y,
Z#?O =#u2Rx%V Utility.log("Thread " + nThreadID + " is over!"); h1Lp:@:| bDownOver = true; \uYUX~}i" //nPos = fileAccessI.write (b,0,nRead); $-y+97 } 646yeQ1 catch(Exception e){e.printStackTrace ();} M&K@><6k,k } ufJFS+? } nqH^%/7)A@ Q?>#sN, pqs)ueu //打印回应的头信息 5[3hw4 public void logResponseHead(HttpURLConnection con) ,'9tR&S$_ { Cam}:'a/` for(int i=1;;i++) V":BAn { dbLX}> String header=con.getHeaderFieldKey(i); GBQb({ if(header!=null) kgI Wgk% //responseHeaders.put(header,httpConnection.getHeaderField(header)); b'OO~>86 Utility.log(header+" : "+con.getHeaderField(header)); ELPJ}moWZ else wx!*fy4hL break; 9t[278B6 } fH.W
kAE1 } R*y[/Aw /;0>*ft4 d3$<|mG$ public void splitterStop() )k1,oUx { <d^7B9O?&w bStop = true; Mz^s^aJEE } mx[^LaR>v iF0a ~Qsj)9 } $O>@(K Jv<)/Km` M~Slc*_% /* g#:XN **FileAccess.java GW#kaqC1 *//文件访问(定位,写) :2My|3H\ package NetFox; z]YhQIU4n8 import java.io.*; ob7_dWAG 'k67$H ^;3rdBprm public class FileAccessI implements Serializable{ rrWk&;? L8zqLDi& //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 a7|&Tbv RandomAccessFile oSavedFile; ;40m goN long nPos; <f6PULm J){\h-4 ZX;k*OrW public FileAccessI() throws IOException }^ <zVdwp { O}-7 V5 this("",0); {|h"/ } Qzhnob#C9 -X[[
OR9+ \?^wu public FileAccessI(String sName,long nPos) throws IOException PQ]9xzOg[ { G7;}309s oSavedFile = new RandomAccessFile(sName,"rw"); EM*OrUe this.nPos = nPos; LPn}QzH oSavedFile.seek(nPos); #<PdZl R } 5Nb_K`Vp* ehusI-q 5)7mjyo% public synchronized int write(byte[] b,int nStart,int nLen) /vDF<HVzm { 2S6EDXc int n = -1; Q/n.T0Z^ try{ ;QQ7vo oSavedFile.write(b,nStart,nLen); .^S78hr]n n = nLen; BznA)EK?@ } kV3j}C" catch(IOException e) b6Hk20+B; { vx@p;1RU` e.printStackTrace (); k#5e:VOb } }.cmiC cu^*x/0, $ F7gH return n; +i#sS19h } TQd FC\@f" u2BW]T] ].P(/~FS9 } QeJ.o.m{ SzlfA%4+GR 25c!-.5D /* (+8xUc(w **SiteInfoBean.java ;T{/; */ OG+r|.N; package NetFox; 0o$HC86w >X,Ag KbdfSF$ public class SiteInfoBean { Z) i1?# ([CnYv x<j"DS}S)D private String sSiteURL; //Site's URL ?U/Wio$@ private String sFilePath; //Saved File's Path UX'NJ1f private String sFileName; //Saved File's Name -0o6*?[Z private int nSplitter; //Count of Splited Downloading File 0 ;_wAk JX/4=.. _#D\*0J public SiteInfoBean() d<Q+D1 {//nSplitter的缺省值为5 +%qSB9_>N{ //default value of nSplitter is 5 QiE<[QP{g this("","","",5); o+_/)c } V"by9p|V` TflS@Z7C 9g
&Ch9-/ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) BZ;}ROmqk { Ym.l@( sSiteURL= sURL; Rs F3#H sFilePath = sPath; G(OT"+O, sFileName = sName; nN`Z0? this.nSplitter = nSpiltter; '<&EPUO
X'#$e{ }\ 939Y } ]]=-AuV. U 'CfP9= myWmU0z/ public String getSSiteURL() TG63 {
!jnqA Z return sSiteURL; [Ql?Y$QB`4 } b4)*<Zp` h lkvk]v (}FW])y public void setSSiteURL(String value) %g0z)J { s"=F^# sSiteURL = value; l!;_lH8W$ } CaYos;Pl `
-[Bo H6ky)kF& public String getSFilePath() H ZDaV&)@ { YQ@dl return sFilePath; \)otu\3/ } uRm _ prlyaq;4 G/fP(o-Wd public void setSFilePath(String value) c+8>EU AW { Oj"pj:fB sFilePath = value; UbY~xs7_ } Q"_T2fl]vP $m:2&lU3 8|5Gv public String getSFileName() UH 47e { X;OsH return sFileName; @ .Z[M } >[|GC/C < QDr,Hj i'W_;Y} public void setSFileName(String value) Y]~ HAv ' { mq
J0z4I} sFileName = value; R=vbUA } 8h&oSOkQk, I|g@W_ NK7H,V}T public int getNSplitter() }uF[Ra { 1V|< A return nSplitter; V3>f*Z)xn } JrCf,?L^ tt6.
jo a=J@yK public void setNSplitter(int nCount) $ \Q<K@{ { g08*}0-k nSplitter = nCount; k4qLB1&, } ;cv.f>Cm } bz,Da (KT38RhA
MU_!&(X_ /* J)9 AnGWe **Utility.java VHXI@UT* */ $}qDV>
qo package NetFox; 0+T*$=? ZYE' C H$z>OS_6U public class Utility { BFBR/d[& m b%C}8D W(;x\Nc7 public Utility() zKIGWH=qqm { ;_mgiKHg ]3n , AHA R%>jJ[4\[ }
b8rp8'M) W|)GV0YM //线程睡眠 99 <4t$KH public static void sleep(int nSecond) E%<w5d.lq { vuYO\u+ud try{ }1QI"M* Thread.sleep(nSecond); fNmE,~ } <RhOjZgyZ catch(Exception e) 2 dHM { WMW1B}Z3 e.printStackTrace (); an3~'g? } ;tJWOm } %lN2n,AK !\QeBd+ //日志 wk" l[cH> public static void log(String sMsg) 3(1]FKZtt { b6 $,Xh System.err.println(sMsg); TqIAWbb& } "gFxfWIA s(Z(e % YTQ5sFuGM public static void log(int sMsg) j]rXoV> { /+>)"D6' System.err.println(sMsg); ZTN(irK } &|)hCJu } $j57LY|r js~tKUvg F "!agc2! /* "[k1D_PZ **TestMethod.java {S G* */ 2;8Xz6T package NetFox; $30oc
Tt{ J0=7'@(p UcgG public class TestMethod { rVY?6OMkd t{!/#eQC )IQ* public TestMethod() X:>$8 ^gS { ///xx/weblogic60b2_win.exe `)T&~2n try{ >QXzMN}o SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); n|WfaJQZ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); m+?N7 SiteFileFetch fileFetch = new SiteFileFetch(bean); |pJC:woq fileFetch.start(); t#Th9G]1 } qP7G[%=v catch(Exception e){e.printStackTrace ();} %;7.9% q(78fZ *X cph~4wCS[U } t-WjL@$F/ _pW_G1U %,/lqc Fo public static void main(String[] args) Jy]Id*u9 { n@hl2M6.x9 new TestMethod(); qe?Qeh(!X } )>\4ULR83 } zN%97q_ 点击下载更多相关资料
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