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/* Th I **SiteFileFetch.java @U7U?.p */ :Kt{t46) package NetFox; *J*zml3 import java.io.*; %'K+$ import java.net.*; .)oQM:F(h ?dATMmT- NK*:w *SOI public class SiteFileFetch extends Thread { VLl&>Pbe- 3RY|l?n> J:M<9W SiteInfoBean siteInfoBean = null; //文件信息Bean FQv02V+&< long[] nStartPos; //开始位置 ,cl"1>lp long[] nEndPos; //结束位置 )%-\hl] FileSplitterFetch[] fileSplitterFetch; //子线程对象 4cv|ok8P long nFileLength; //文件长度 ]lG_rGw boolean bFirst = true; //是否第一次取文件 P17]}F`` boolean bStop = false; //停止标志 $n_sGr File tmpFile; //文件下载的临时信息 Rqv+N] DataOutputStream output; //输出到文件的输出流 0|f_C3 8.
~Euz //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 0^|$cvYiL public SiteFileFetch(SiteInfoBean bean) throws IOException }b\ipA,~ { *(_ON$+3 siteInfoBean = bean; 3 8ls 4v3 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); )aO!cQ{s tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); \dQ2[Ek if(tmpFile.exists ()) "1pZzad
{ b W`)CWd bFirst = false; `rRg(fCN!M read_nPos(); _YD<Q@ } +eH=;8 else (\AszLW { +L<w."WG nStartPos = new long[bean.getNSplitter()]; 9h)P8B.>M nEndPos = new long[bean.getNSplitter()]; ).@)t:uNa } PT=2LZ !Dhfr{ Xl
'\krz iI/'!85 } r.W"@vc> 1&x0+~G %'p|JS public void run() ,m_&eF { &Funao> //获得文件长度 Vo58Nz:% //分割文件 K;(|v3g6 //实例FileSplitterFetch >LRaIU> //启动FileSplitterFetch线程 !{|yAt9kP //等待子线程返回 x,@O:e try{ %.r5E2' if(bFirst) DrYoC7 { 9Y*Vz QE nFileLength = getFileSize(); ".7KEnx if(nFileLength == -1) DNTRLIKa { 34&$_0zn System.err.println("File Length is not known!"); {pi67"mYp } B3i=pcef else if(nFileLength == -2) wNlV_ { 'e8d["N System.err.println("File is not access!"); @a{v>) } E].a|4sh else IcNI uv { ,J4a~fPf for(int i=0;i<nStartPos.length;i++) -a#AE|` { +[go7A$5 nStartPos = (long)(i*(nFileLength/nStartPos.length)); j^R~ Lt4 } :X'U`jE for(int i=0;i<nEndPos.length-1;i++) )SO1P6 { IBsO nEndPos = nStartPos[i+1]; j$/uJ` } X/C54%T ~ nEndPos[nEndPos.length-1] = nFileLength; N"Nd $4 } P^W$qy| } x[h<3V" (Su2\x x[,wJzp\6 //启动子线程 M<me\s) fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 0.,&B5) for(int i=0;i<nStartPos.length;i++) M}RFFg { kv FOk fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #._6lESK siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ]k%KTvX*G nStartPos,nEndPos,i); pJ@DHj2@
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?.'oxW
fileSplitterFetch.start(); R^w >aZoJ } ?VHwYD.B // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >w2WyYJYH siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); p9bxhnn| // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", B7^n30+L nEndPos = " + nFileLength); rzY@H }u // fileSplitterFetch[nPos.length-1].start(); jMN@x]6w 7QRvl6cv 4Fht(B| //等待子线程结束 6P[O8 //int count = 0; /[|md0, //是否结束while循环 ;$&5I9N boolean breakWhile = false; t7`Pw33#kY a!]QD` '/)_{Ly while(!bStop) T<~[vjA { iZqFVr&JF write_nPos(); LFry?HO,D Utility.sleep(500); Rhxm)5 + breakWhile = true; d}G."wnG9, 6je%LHhL s)ajy^6'M for(int i=0;i<nStartPos.length;i++) 1$!K2=%OXj { ^oZs&+z if(!fileSplitterFetch.bDownOver) L,ey3i7a\ { ?;kc%Rz breakWhile = false; =kkA break; Z["nY&.sI } ~5?n&pF } D&lXi~Z%. if(breakWhile) ,Onm!LI= break; lfG&V +S1 gKH"f%lK GHrT?zEX //count++; z Clm'X/ //if(count>4) S:T>oFUot // siteStop(); * =N6_ } Y:Tt$EQ tqk6m# @( `v+O5 System.err.println("文件下载结束!"); ]cY'6'}Hz } wAwH8x LU catch(Exception e){e.printStackTrace ();} p{QKj3ov } u>Kvub ?ew]i'9( JA2} //获得文件长度 ^bw~$*"j# public long getFileSize() 2\W<EWJ@ { -5*;J&. int nFileLength = -1; ^ x#RUv try{ F476"WF URL url = new URL(siteInfoBean.getSSiteURL()); ^mb*w)-p? HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); JO$]t|I httpConnection.setRequestProperty("User-Agent","NetFox"); PH=8'GN F4l6PGxF&\ QU;C*}0Zl int responseCode=httpConnection.getResponseCode(); K&oO+ G^f if(responseCode>=400) {.)~4.LhQM { T1TZ+\ processErrorCode(responseCode); ~}l,H:jk@ return -2; //-2 represent access is error G#M]\)f% } +0042Yi LOo# WY UU- String sHeader; /JYi^rZ x1ex}_\ h^X.e[ for(int i=1;;i++) l3$?eGGM { U?C{.@#w //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); O/"&?)[v //Utility.log(in.readLine()); 7im;b15j`' sHeader=httpConnection.getHeaderFieldKey(i); FA GVpO[ if(sHeader!=null) U9OF0=g { aM1JG$+7 G if(sHeader.equals("Content-Length")) cHd39H9 { wBGxJ\+M nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); d'J?QH!N0 break; N%i<DsK.u6 } yXmp]9$ } %'<
qhGJ else j;vaNg|vQ break; 5~5ypQj } ?':'zT } t;6/bT- catch(IOException e){e.printStackTrace ();} ~Q]M_,`M catch(Exception e){e.printStackTrace ();} cK/odOi >QPS0Vx[ $~\qoW< Utility.log(nFileLength); D(GHkS*0q 6lFs N2 K 6Ua~N^ return nFileLength; \Ki#"%S } [K QZHIe T!E LH! S-dV //保存下载信息(文件指针位置) rrq-so1u}
private void write_nPos() )Jn80~U|1 { Q)8t;Kx try{ <:o><f+ output = new DataOutputStream(new FileOutputStream(tmpFile)); wAPdu y[ output.writeInt(nStartPos.length); s2kynQ#a for(int i=0;i<nStartPos.length;i++) MeS$+9jV( { 2F]MzeW // output.writeLong(nPos); s os& output.writeLong(fileSplitterFetch.nStartPos); ttRH[[E( output.writeLong(fileSplitterFetch.nEndPos); zW.sXV, } CAO{$<M5m output.close(); MQu6Tm H } vnpX-c catch(IOException e){e.printStackTrace ();} /y@iaptC catch(Exception e){e.printStackTrace ();} ,B!Qv3bn } tam/FzVw 7Kjq1zl; Reo0ZU> //读取保存的下载信息(文件指针位置) wtyu"=
private void read_nPos() e2F7G>q:5 { Z2
4 m try{ @x4Dt&:" DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); E$
rSrT( int nCount = input.readInt(); g#*N@83C nStartPos = new long[nCount]; aKO@_R,: nEndPos = new long[nCount]; N<%,3W_-_ for(int i=0;i<nStartPos.length;i++) : Tl?yGF { N<WFe5 nStartPos = input.readLong(); s q$|Pad[ nEndPos = input.readLong(); 6Rj
X } RPQ)0.O7 input.close(); rY.:}D } ,j<"~"]
= catch(IOException e){e.printStackTrace ();} zq&lxySa catch(Exception e){e.printStackTrace ();} }% *g\%L } i&KODhMpP @YELqUb* p
IToy;] private void processErrorCode(int nErrorCode) ?HTwTi5!) { /|f]L9)2< System.err.println("Error Code : " + nErrorCode); e^TF.D?RS } b iD7(AK f
;JSP 4 vphLAm //停止文件下载 4{pa`o3 public void siteStop() wr(?L7
$+ { lB-7. bStop = true; n66_#X for(int i=0;i<nStartPos.length;i++) =G :H)i fileSplitterFetch.splitterStop(); v;7u"9t <}%*4mv WDq3K/7\ } W#Z]mt B } tK*f8X+q //负责部分文件的抓取 xh$[E&2u **FileSplitterFetch.java b;vO` */ y-mmc}B>N package NetFox; xC(PH?_ ^8)d8?} &XP 0 import java.io.*; "-sz7}Mb import java.net.*; DQd&:J@? 8*X8U:.0o ewY X \ public class FileSplitterFetch extends Thread { ececN{U/ "fdG5|NJe {H74`-C)W String sURL; //File URL J4<*KL~a long nStartPos; //File Snippet Start Position
Nnw iH long nEndPos; //File Snippet End Position ;N|6C+y int nThreadID; //Thread's ID \=JKeL|6[S boolean bDownOver = false; //Downing is over J$oJ boolean bStop = false; //Stop identical ge|}'QKow FileAccessI fileAccessI = null; //File Access interface ak zb<aT ]3G2mY;`"% *zcH3a,9"x public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `/O_6PQ} { NbdaP{{ this.sURL = sURL; l;4F,iI this.nStartPos = nStart; qM)^]2_- this.nEndPos = nEnd; QXCI+Fcg nThreadID = id; SL*(ZEn" fileAccessI = new FileAccessI(sName,nStartPos);//定位 }PVB+i M } P<1zXs.H F`l1I=; Nf1l{N public void run() VQyDd~Za { uB
BE!w_ while(nStartPos < nEndPos && !bStop) G+ToZ&f@ { e=U7w7(s9 Yi:+,-Fso B^
h!F8DC try{ P06K0Fxf URL url = new URL(sURL); yI!K
quMC HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); " 1Bn/Q httpConnection.setRequestProperty("User-Agent","NetFox"); Q_Rr5/ String sProperty = "bytes="+nStartPos+"-"; Oo E@30+ httpConnection.setRequestProperty("RANGE",sProperty); I/adzLQ Utility.log(sProperty); J
GdVSjNC uAP|ASH9T Lqt] InputStream input = httpConnection.getInputStream(); R!O'DM+ //logResponseHead(httpConnection); M1:m"#= a)]N#gx /CP1mn6H byte[] b = new byte[1024]; :\ S3[(FV int nRead; VH/_0 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) I'";
{ u}$?r\H'( nStartPos += fileAccessI.write(b,0,nRead); OtJS5A //if(nThreadID == 1) iMSS8J // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); # 8A|-u=3 } 0R.@\?bhL +ad 2 2IGAZ%% Utility.log("Thread " + nThreadID + " is over!"); plca` bDownOver = true; 4H'9y3dk //nPos = fileAccessI.write (b,0,nRead); WVVqH_ } +XsY*$O catch(Exception e){e.printStackTrace ();} qz 'a.]{= } Wl1%BN0> } j=7 ]"% ;fuy}q8@7 hod|o1C& //打印回应的头信息 E @7! : public void logResponseHead(HttpURLConnection con) u{si { T"$"`A" for(int i=1;;i++) n[<Vj1n { {d)+a$qj String header=con.getHeaderFieldKey(i); {2,V3*NF if(header!=null) ^'}Td~( //responseHeaders.put(header,httpConnection.getHeaderField(header)); MSA*XDnN Utility.log(header+" : "+con.getHeaderField(header)); >y1/*)O9~ else wFh{\ break; ZEB1()GB } %FwLFo^v } PffRV7qU0 BQm H9g|2 T =:^k+ public void splitterStop() J &c}z4 { ]_-<[0 bStop = true; RAe:$Iv$!v } "UE'dWz UXd\Q'' "kMpa]<c-6 } zU(U^ Ls9G:>'rR #CM2FN:W /* h5F1mr1Sa **FileAccess.java `A#r6+ *//文件访问(定位,写) x.'O_7c0: package NetFox; oYu5]ry import java.io.*; >J4_/p>Qs *-2u0 %
^K3{6}] public class FileAccessI implements Serializable{ Q?vGg{> *'Ch(c:rtH //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 7-)Y\D RandomAccessFile oSavedFile; x;ujR< long nPos; mWtwp- yHCBf)N7\ /7*u!CNm public FileAccessI() throws IOException hF6EOCY6D { )4j#gHN\ this("",0); T1Xm^{ } k)4
~dC^| )5B90[M|t public FileAccessI(String sName,long nPos) throws IOException Hq=RtW2 { 4rv3D@E oSavedFile = new RandomAccessFile(sName,"rw"); Ix"uk6 h this.nPos = nPos; i2EB.Zlv oSavedFile.seek(nPos); Ehg5u'cj } Y]P]^3 Dk:Zeo]+my HdVGkv/ public synchronized int write(byte[] b,int nStart,int nLen) * ,,D%L { 2&dtOyxo> int n = -1; JI(8{ f try{ /+%1Kq.hP oSavedFile.write(b,nStart,nLen); Kg9REL@,s n = nLen; LTrn$k3} } O0wD"V^W catch(IOException e) --y.q~d { i4AmNRs e.printStackTrace (); C5F}*]E[y } hb`(d_= 7F %A?Ym33 2Ui)'0 return n; {4UlJ,Z.n } "#(]{MY IS"UBJ6p 7x`uGmp1 } FD[*mCGZ H=EvT'g BB9Z?} /* HnrT;!C~ **SiteInfoBean.java B2VUH..am */ #AE'arT< package NetFox; tFXG4+$D Ot5
$~o jPhOk>m public class SiteInfoBean { 9J*m!-hOY (m})V0/` 3.
fIp5g private String sSiteURL; //Site's URL zkB_$=sbn# private String sFilePath; //Saved File's Path SxNs private String sFileName; //Saved File's Name 8z\WyDz private int nSplitter; //Count of Splited Downloading File cvi+AZ= C^]bXIb ,Epg&)wC] public SiteInfoBean() mq>Ag {//nSplitter的缺省值为5 "@DCQ //default value of nSplitter is 5 $}N'm this("","","",5); XswEAz0= } Sw>AgES zAS&L%^ tV 3%>"|Ye}A public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ^<7)w2ns { o^2.&e+dQ sSiteURL= sURL; %/jmQ6z^ sFilePath = sPath; (yn!~El3 sFileName = sName; 'Q?nU^:F# this.nSplitter = nSpiltter; IKH#[jW'IB |v:8^C7 d'J))-*#UO } $D1Pk *[k7KG2_U ,@8>=rT public String getSSiteURL() 5,k&^CK} { U5%EQc-"P return sSiteURL; lhKd<Y" } PKty'}KF 3@_je)s VWaI!bK public void setSSiteURL(String value) UII R$,XB { 8 }nA8 J sSiteURL = value; }r9f}yX9Q } 3;@t{rIin esWgYAc3{ pu=Q;E_f[ public String getSFilePath() 32:q' { #Q"el3P+q return sFilePath; 6uOR0L } 0'% R@| 9co1+y=i{ lmgMR|v public void setSFilePath(String value) T[*=7jnJQ { 7JQ5OC3 sFilePath = value; UXnd~DA } z{7&= $ Y6 ,< j| =AUR]&_B public String getSFileName() ;spuBA)[X { -6aGcPq return sFileName; 5a&[NN } fYl$$. ?yU|;my &Dgho public void setSFileName(String value) 0,{Dw9W: { j"7 z sFileName = value; [}N?'foLb } ]+{Cy\*kR ?S36)oZzg oOnk,U public int getNSplitter() W -8<sv$b { {;=I69X return nSplitter; "9>~O`l, } HBXp#$dPc =(3Qbb1i l%oie1g l public void setNSplitter(int nCount) ]Jq1b210 { y9?B vPp+ nSplitter = nCount; o5-oQ_j } 7AX<>^ } /xWkP{ t:9}~%~ g~S>_~WL /* Eo!1
WRruF **Utility.java a]Bm0gdrO */ tK`sVsm> package NetFox; XTUxMdN .R#p<"$I j*Ta?'* public class Utility { G29PdmY$< O$V
6QJ ={o>g' public Utility() s=!
y% { <=l!~~% qH: `
O%, \f}S Hh } Zm>Q-7r9 4/&Us //线程睡眠 \SHYwD}*Pr public static void sleep(int nSecond) A|,\}9)4X[ { y+)][Wa0 try{ 5hUYxF20h8 Thread.sleep(nSecond); T2P0(rEz } ?Lbwo<E catch(Exception e) ;XMbjWc { Zrr3='^s e.printStackTrace (); ;e_dk4_ } Ou"QUn| } vQ#$.*Cvn G|Yw
a= //日志 !h4S`2oZ/ public static void log(String sMsg) mnzamp { &cV$8*2b^ System.err.println(sMsg); $W<H[k&(B } j7K9T 7[rn
,8@ rRRiqmq public static void log(int sMsg) 3k`"%R.H { idMb}fw> System.err.println(sMsg); 'ejuzE9 } m\(4y Gj } R
rs?I,NV cKEf- &~ B.-5$4*s /* 9<I@}w **TestMethod.java F #Uxl%h */ >eQ;\j package NetFox; (YVl5}V W$O^IC %*wJODtB| public class TestMethod { H$>D_WeJ hZ Gr/5f 6;60}y public TestMethod() }{[H@uhjH { ///xx/weblogic60b2_win.exe FbO-K- try{ $Q{)AN;m SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); DmEmv/N= //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ?7 e|gpQ| SiteFileFetch fileFetch = new SiteFileFetch(bean); tSV}BM, fileFetch.start(); 7h?PVobe } 7(rTGd0 catch(Exception e){e.printStackTrace ();} =uQCm# ywXerz7dUk f50qA;7k } O&.^67\| oUIa/}}w5 <mjH#aSy public static void main(String[] args) gQ3Co ./ { O@{ JB new TestMethod(); :0$(umW@I" } yw^t6E } _v{,vLH 点击下载更多相关资料
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