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/* ryB}b1`D **SiteFileFetch.java 2i;7{7 */ Ae]sGU|?' package NetFox; kQ1w5mCh import java.io.*; ^9Qy/Er' import java.net.*; =X\^J &>d:R_Q] M?m,EQh. public class SiteFileFetch extends Thread { R^?/' dr $odso;Hn LUB${0BrA SiteInfoBean siteInfoBean = null; //文件信息Bean y!tC20Q long[] nStartPos; //开始位置 (T`E!A0I\? long[] nEndPos; //结束位置 2 3OC2| FileSplitterFetch[] fileSplitterFetch; //子线程对象 0}!\$"|D long nFileLength; //文件长度 h8Yx#4
boolean bFirst = true; //是否第一次取文件 p
sL?Y boolean bStop = false; //停止标志 #(An6itl File tmpFile; //文件下载的临时信息 IxLhU45 DataOutputStream output; //输出到文件的输出流 q9Y9w( ^nbnbU4' //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) iQDx{m3] public SiteFileFetch(SiteInfoBean bean) throws IOException {|I;YDA { hGpv2>M siteInfoBean = bean; y;_% W //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Pj}66. tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); VD_$$Gn*q if(tmpFile.exists ()) -py@DzK { FEVEp bFirst = false; PDs@?nz, read_nPos(); ~e6Brq } 1UPC e else '>r7V { EoK~S\dS nStartPos = new long[bean.getNSplitter()]; '!/<P"5t nEndPos = new long[bean.getNSplitter()]; KQB3m" } 0c} }Q yKO`rtP vZ.x{"n'~ <HbcNE~ } ``wSc0\ s"t$0cH9 >=[(^l public void run() 'Lu__NfN { '7XIhN9 //获得文件长度 z`:lcF{V //分割文件 (Jz1vEEV //实例FileSplitterFetch xlQBe-Wg //启动FileSplitterFetch线程 4$P0 : //等待子线程返回 }GeSu|m( try{ Y1]n^ if(bFirst) rqY`8Ry2M { z11O F nFileLength = getFileSize(); 6Vz9?puD if(nFileLength == -1) \B,(k< { Oil?JI Hq System.err.println("File Length is not known!"); %}%Qc6.H } Z]B~{!W1 else if(nFileLength == -2) |UX(+;n
{ ]*AR,0N& System.err.println("File is not access!"); <yd{tD$A* } 3\XU_Xs(] else *s:(jDlv { 1fpQLaT for(int i=0;i<nStartPos.length;i++) %44leINx { DAXX;4 nStartPos = (long)(i*(nFileLength/nStartPos.length)); e
J6$-r } `\}v#2VJ for(int i=0;i<nEndPos.length-1;i++) )c)vTZy { s,]z[qB#$ nEndPos = nStartPos[i+1]; zx)z/1 } Y\No4w ^|d nEndPos[nEndPos.length-1] = nFileLength; , GP?amh } k7T`bYv } neLAEHV "thdPZ Eea*s' //启动子线程 4rLL[?? fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ]@phF _ for(int i=0;i<nStartPos.length;i++) S[J}UpV { _no*k?o* fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ee^{hQi siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ?!` /m|" nStartPos,nEndPos,i); ~XOTs Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); |>dI/_' fileSplitterFetch.start(); =w{Z@S(ukz } ?`PvL!' // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), lE4HM$p
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); $w`=z<2yo1 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", =`H@% nEndPos = " + nFileLength); 'F9 jq // fileSplitterFetch[nPos.length-1].start(); OG>}M$Ora =Jyu4j *} oY H^_V //等待子线程结束 y.< m#Zzt //int count = 0; woK&q 7Vn //是否结束while循环 RO'7\xvn boolean breakWhile = false; }E50>g Na]:_K5Dp ;z $(nhJ while(!bStop) hvsWs.;L' { ?fi,ifp*|l write_nPos(); ]QlwR'&j/n Utility.sleep(500); huh6 t ! breakWhile = true; b?tB(if!I j}.\]$J
CDK5 for(int i=0;i<nStartPos.length;i++) l*d(;AR { o <pf#tifv if(!fileSplitterFetch.bDownOver) m8d!<
h { Bf ~vA4 breakWhile = false; i#vYyVr[ break; gc-@"wI? } PgF*
1 } Lh!J > if(breakWhile) YUtC.TR1 break; RC7]'4o 4NheWM6 UCB/=k^m //count++; Qp_isU //if(count>4) Bg x'9p/ // siteStop(); 3z{?_;bR } 1W^taJH] Krqtf .6+Z^,3 System.err.println("文件下载结束!"); =5~jx } FQ<Ju. catch(Exception e){e.printStackTrace ();} [+n*~ } o ,AAC ,St#Vla qNB<T(' //获得文件长度 7:plQ!7^ public long getFileSize() oAODp!_c { #S!)JM|4wk int nFileLength = -1; N4F.Y"R$( try{ 6xTuNE1 URL url = new URL(siteInfoBean.getSSiteURL()); MyJ%`@+1 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); {?}E^5Z*g httpConnection.setRequestProperty("User-Agent","NetFox"); 0zmE>/O+ Z>:NPZODf Vc&!OE int responseCode=httpConnection.getResponseCode(); cQy2"vtU if(responseCode>=400) zPn+V7F { "O3tq=Q processErrorCode(responseCode); vWzm@ return -2; //-2 represent access is error ` Mjj@[ } *\+\5pu0 PUp6Q;AdQ CkOz String sHeader; c|e~BQdRw [%y';`( x [1g8*j~L for(int i=1;;i++) zy/@
WFPE { /?5 1D@ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); +Vb.lH[av //Utility.log(in.readLine()); U)fc*s sHeader=httpConnection.getHeaderFieldKey(i); Rr&h!YMb if(sHeader!=null) }~e8e { ,<(}|go if(sHeader.equals("Content-Length")) } gyj0 { z+0I#kM"1 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 3]}D`Qs6 break; %?0:vn } k]F[>26k } h\fjBDU^ else ^ Edfv5 break; +\d56j+D } I8hz(2jI } n{n52][J] catch(IOException e){e.printStackTrace ();} dk[!V1x4\ catch(Exception e){e.printStackTrace ();} o4G ?nvK- CGW.I$u lA|
5E? Utility.log(nFileLength); oK6tTK (-UYB9s O,{6*[)@ return nFileLength; x gVeN[" } eVjBGJ=2e <=zQ NBtx }aa'\8 //保存下载信息(文件指针位置) ,>bh$| private void write_nPos() SA&Rep^ { kJ'[K!r try{ :;t:H]
f output = new DataOutputStream(new FileOutputStream(tmpFile)); ^me-[
5 output.writeInt(nStartPos.length); u%&`}g for(int i=0;i<nStartPos.length;i++) SD"FErJ { Yg]-wQrH // output.writeLong(nPos); QO<jI#
output.writeLong(fileSplitterFetch.nStartPos); +nrbShV output.writeLong(fileSplitterFetch.nEndPos); M'?,] an } 2V-
16Q'% output.close(); Z3"%`*Tmq- } k^3>Y%^1 catch(IOException e){e.printStackTrace ();} EU2$f catch(Exception e){e.printStackTrace ();} D=q:*x } l:
HTk4$0 -u6bAQ \:%(q/v"X //读取保存的下载信息(文件指针位置) 9&-dTayIz private void read_nPos() Sq>dt[7 { cvn@/qBq*t try{ "%`1]Fr DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 1{)5<!9! l int nCount = input.readInt(); K[I=6 nStartPos = new long[nCount]; d~9A+m3b_ nEndPos = new long[nCount]; zGb|) A~, for(int i=0;i<nStartPos.length;i++) F+YZE[h% { f',Op1o nStartPos = input.readLong(); \j@OZ nEndPos = input.readLong(); R/~p>apg8 } 6dq(T_eG input.close(); !j9t*2m[ } epA:v|S catch(IOException e){e.printStackTrace ();} ;5]Lf$tZ catch(Exception e){e.printStackTrace ();} 5Yg'BkEr } |kyX3~ ~8q)^vm>f? q }i]'7 private void processErrorCode(int nErrorCode) F|SXn\ { dPW#C5dm System.err.println("Error Code : " + nErrorCode); m ifxiV } \r/rBa\ pj\u9
L_ du<tGsy //停止文件下载
R5N%e%[ public void siteStop() G?L HmTHg { x>**;#7) bStop = true; @x*c1%wg for(int i=0;i<nStartPos.length;i++) lEH65;Nh* fileSplitterFetch.splitterStop(); S5gyr&dm !y\'EW3|G {BP{C=p } "M<8UE \n } \o z#l'z //负责部分文件的抓取 -R|,9o^ **FileSplitterFetch.java \{Y 7FC~ */ H`*LBqDk package NetFox; p)KheLiZ &y\prip Gw}%{=D9 import java.io.*; m]'#t)B_m import java.net.*; y*4=c_Z |6.l7u?d p2hB8zL public class FileSplitterFetch extends Thread { =mO vs $h+1u$po .T}Wdng String sURL; //File URL 2":pE U{E long nStartPos; //File Snippet Start Position Q1U\D long nEndPos; //File Snippet End Position u}#(.)a: int nThreadID; //Thread's ID 1vS#K=sb boolean bDownOver = false; //Downing is over Ow+GS{-q boolean bStop = false; //Stop identical ] ]u
s % FileAccessI fileAccessI = null; //File Access interface 1auIR/=- KI.q@zO6| 6/f7< public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException k9<;woOBO { qLO4#CKCL6 this.sURL = sURL; +jAGGv^) this.nStartPos = nStart; fW{(lPx this.nEndPos = nEnd;
oI?3<M^ nThreadID = id; :">!r.Q fileAccessI = new FileAccessI(sName,nStartPos);//定位 `
)/vq-9 } pd:WEI
, ts,ZvY] 3OrczJ=[UF public void run() F8nYV { G0CW}e@) while(nStartPos < nEndPos && !bStop) +>8'mf { C/q'=:H; Jz\%%C '*Z1tDFS try{ C(eTR1 URL url = new URL(sURL); a4mn*, HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); JYMiLph< httpConnection.setRequestProperty("User-Agent","NetFox"); ?fQ'^agq String sProperty = "bytes="+nStartPos+"-"; @bi}W` httpConnection.setRequestProperty("RANGE",sProperty); RF`.xQ26= Utility.log(sProperty); S4Pxc
]! (9tX5$e6N eVEV}`X InputStream input = httpConnection.getInputStream(); 4n#M //logResponseHead(httpConnection); 3$9s\<j j%Y#(Q> z{8bvuE byte[] b = new byte[1024]; TtK[nP int nRead; #oS<E1 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) F3y9@dA] { lXx=But nStartPos += fileAccessI.write(b,0,nRead); J-[,KME_^ //if(nThreadID == 1) _F4Ii-6 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /Y/UM3/ } C>ICu*PW d8DV[{^ jSJqE_ 1 Utility.log("Thread " + nThreadID + " is over!"); \e:7)R2<!x bDownOver = true; F6LH $C //nPos = fileAccessI.write (b,0,nRead); ;d@#XIS&-( } ,dv+p&Tz2 catch(Exception e){e.printStackTrace ();} DMAIM|h } FDv<\2+ c } "x#-sZ= l94b^W}1)W ~Sdb_EZ //打印回应的头信息 )~&CvJ public void logResponseHead(HttpURLConnection con) Je';9(ZK { 7dN*lks for(int i=1;;i++) PoHg,n] { 3>3 Kwc~E String header=con.getHeaderFieldKey(i); |sa]F5 if(header!=null) SDC4L <! //responseHeaders.put(header,httpConnection.getHeaderField(header)); -fM1nH& Utility.log(header+" : "+con.getHeaderField(header)); UI0(=>L else |+{)_? break; gx-2v|pZ } XP`Nf)3{Yd } zp6C3RG( Cw~q4A6' '%>=ZhO public void splitterStop() -Sqz5lo { xv46r=> bStop = true; Z3%}ajPu[ } 3D6RLu LmRy1T,act We)xB } T!uM+6|Y ]GUvV&6@( HsxVZ.dS /* &g#@3e1> **FileAccess.java }?lrU.@zg *//文件访问(定位,写) sm9k/(- package NetFox; _qU4Fadgm import java.io.*; C=-=_>Q,L< 3W V"U V#v`(j% public class FileAccessI implements Serializable{ ( B!uy` 3N8t`N //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 zh%#Y_[R RandomAccessFile oSavedFile; PoNi"Pv long nPos; 9q)Kfz 6o^,@~:R `34zkPB?? public FileAccessI() throws IOException j
'FVz& { ?}qttj this("",0); W,D4.w$@' } Ig$(3p
?llXd4 i|c'Lbre` public FileAccessI(String sName,long nPos) throws IOException U1Q:= yD { Yy5h"r oSavedFile = new RandomAccessFile(sName,"rw"); }~2LW" 1' this.nPos = nPos; \1d( 9jR oSavedFile.seek(nPos); Ltv]pH}YN } iky|Tp &)2i[X >u>5{4 public synchronized int write(byte[] b,int nStart,int nLen) -N6f1>}pE { toLV4BtIG int n = -1; >f^r^P try{ dMPc:tJT oSavedFile.write(b,nStart,nLen); ^/uA?h:]\ n = nLen; H-WJp<_ } lvdf^b/
j catch(IOException e) LuNc,n% { D!@Ciw e.printStackTrace (); Q`~jw>x } q6@Lp^f $:BKzHmg |<HPn4
,X return n; \4&fxe } .rO]M:UY 7z/|\D_{ F7
5#* } %]Fd[pzF >i_2OV ? 8)'oMD /* :C7_Jp*Qv **SiteInfoBean.java aL*&r~`&e' */ . kQkC:~9 package NetFox; !4]TXH0f 2-&k^Gl!: hM@
H A public class SiteInfoBean { WgR).Yx |"?M 1*g X]'{(?Ch private String sSiteURL; //Site's URL xRJ\E }/7 private String sFilePath; //Saved File's Path 7zA'ri3w private String sFileName; //Saved File's Name W_||6LbZy private int nSplitter; //Count of Splited Downloading File >5_2_Y$" 0bz'& ?@BTGUK"C public SiteInfoBean() .Fs7z7?Y {//nSplitter的缺省值为5 2n3W=dF //default value of nSplitter is 5 0f~C#/[t7 this("","","",5); wE[]6\_x1 } 5*E]ETo@R O#b6mKPt;t O|\J}rm' public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) c$ao:nP)D { dUsYZdQs sSiteURL= sURL; wy yWyf sFilePath = sPath; RzxNbeki[W sFileName = sName; hq%?=2'9? this.nSplitter = nSpiltter;
05z,b]>l ?<V?wsp R,gR;Aarw } |h- QP#]/ N2B|SO'' H+1-] 'g` public String getSSiteURL() >go,K{cK6 { ahuGq' return sSiteURL; BZ:H`M`n } E7NV ^4h prYs
$j lH-/L(h2 public void setSSiteURL(String value) Q7*SE%H { b8~Bazk sSiteURL = value; l H#u } %oq{L]C(rf Kw-gojZ ^.KwcXr public String getSFilePath() >XK
PTC5H { uZM{BgXXD return sFilePath; ~T9/#-e>BF } Kh,V.+7k O/,aJCe
e91aK public void setSFilePath(String value) m=?KZ?U` { &f"-d sFilePath = value; q-.,nMUF } xGu r " 7!;KHc )T';qm0w public String getSFileName() 5V6G=H { t?q@H8 return sFileName; ' qWALu } uxW~uEh {)"iiJ n1JRDw"e$$ public void setSFileName(String value) o}W%I/s { C
'v+f= sFileName = value; &S( .GdEf } N03HQp)g /`f^Y>4gD ]DOX?qI
i public int getNSplitter() <\Eh1[F { @W vatD
V return nSplitter; fBalTk;G{U } :A1{ d?B b?TO=~k, &{>cZh}\ public void setNSplitter(int nCount) [onGNq?# { P/c&@_b nSplitter = nCount; /4c\K-Z; } L!rw[x } X}tVmO? e?opkq\f R#2 t)y /* 2W/?q!t **Utility.java Q,p}:e */ 9A}# 6 package NetFox; \=uKHNP?# q8s0AN'@t' ^~G8?]w public class Utility { %F!1 Gs9:6 @c<3b2 public Utility() BlXB7q, { Fe]B&n 5#> 8MU?& _acE:H } [* @5\NWR} >c9a0A //线程睡眠 rypTKT|U; public static void sleep(int nSecond) >)spqu] { AT9q3 try{ lD"(MQV@0 Thread.sleep(nSecond); 4zJtOK?r" } JS*m65e catch(Exception e) 89\n;5'f4 { cgm81+[%r e.printStackTrace (); mH Ic f{RG } s}jHl8 } GFel(cx:K }RHn)}+ //日志 ,!dh2xNH^ public static void log(String sMsg) Eo#u#IY { %,D<O,N System.err.println(sMsg); A-4h } mf}O-Igte gF[z fDm JMH8MH* public static void log(int sMsg) 6`]$qSTS { i?fOK_d System.err.println(sMsg); m|=H# } =dII- L=` } 'Y56+P\u UEozAY ]`&Yqg /* P@,nA41,j **TestMethod.java w9,iq@ */ Gm(b/qDDe package NetFox; [1F*bI &2 `F n!m 6(G?MW. public class TestMethod { %,Ap7X3:QT i K12pw \'9PZ6q{ public TestMethod() ,t`Kv1 { ///xx/weblogic60b2_win.exe "g'jPwFG try{ !!Aj<*% SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); *,Za6.= //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); wc!onZX5 SiteFileFetch fileFetch = new SiteFileFetch(bean); LxpuhvIO fileFetch.start(); 'A:x/iv}^ } fH)YFn/ catch(Exception e){e.printStackTrace ();} x-?{E 4H|(c[K; hWKJ,r%9; } PSPmO'C+ sgO'wXcoP $dA-2e10 public static void main(String[] args) s%2v3eb { "R3d+p new TestMethod(); LrATSq@ } L~ IhsiB } KyzFnVH3) 点击下载更多相关资料
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