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/* pwFU2}I **SiteFileFetch.java })o~E */ q:Y6fbt<7 package NetFox; CYPazOfj import java.io.*; 2ec$xms import java.net.*; tLD~ *t#s$Ga A$%Q4jC} public class SiteFileFetch extends Thread { ]DC;+;8Jc \);.0 Ic[}V0dk SiteInfoBean siteInfoBean = null; //文件信息Bean i<4>\nc long[] nStartPos; //开始位置 pKt-R07* long[] nEndPos; //结束位置 :M22P`: FileSplitterFetch[] fileSplitterFetch; //子线程对象 fJ)N:q` long nFileLength; //文件长度 o~v_PD[S boolean bFirst = true; //是否第一次取文件 lX98"} boolean bStop = false; //停止标志 Y{k>*: Ax_ File tmpFile; //文件下载的临时信息 HY jMNj0 DataOutputStream output; //输出到文件的输出流 s;fVnaqG:
eeW' [ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) uFwU-LCe public SiteFileFetch(SiteInfoBean bean) throws IOException )\T@W { ~Na=+}.q_ siteInfoBean = bean; XYqpI/s //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); XJx,9trH tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 2qZa9^} if(tmpFile.exists ()) E /fw?7eQ { 4GG1E. z} bFirst = false; -A/ds1=; read_nPos(); \4h>2y } Ni2]6U else 9z5"y|$ { ,c4c@|Bh? nStartPos = new long[bean.getNSplitter()]; "El^38Ho nEndPos = new long[bean.getNSplitter()]; lpl8h4d } v!NB~"LQ uP{;*E3? b!i`o%Vb ],;D2]<s } 5/& 1Oxo `%-4>jI9- Y]C;T public void run() JN9^fR09G { `9.dgV //获得文件长度 I2TD.wuIW //分割文件 1<xcMn0et //实例FileSplitterFetch [096CK //启动FileSplitterFetch线程 ]>tq|R78 //等待子线程返回 ,f}h} try{ 3g4e']t if(bFirst) `1nRcY { [RAj3Fr0 nFileLength = getFileSize(); P3'2IzNw if(nFileLength == -1) +"]oc{W! { BJ~ivT< System.err.println("File Length is not known!"); puFXPw.3 } +$>N]1 else if(nFileLength == -2) \,>_c { QJx9I_ System.err.println("File is not access!"); MV%Xhfk } )-=2w-ZX else {mNdL J { y L*LJ for(int i=0;i<nStartPos.length;i++) \r)%R5_CQ { 4\p$4Hs} nStartPos = (long)(i*(nFileLength/nStartPos.length)); ;aq `N}d } 7t'(`A6t/ for(int i=0;i<nEndPos.length-1;i++) |q3f]T&+>{ { mO#I nTO nEndPos = nStartPos[i+1]; }l~]b3@qu } %$Aqbd nEndPos[nEndPos.length-1] = nFileLength; l`SK*Bm~< } "$GK.MP5 } E@:Q 'g% :@.C4oq :~yzDk\I"- //启动子线程 @4;&hP2Z: fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; @gNpJB]V for(int i=0;i<nStartPos.length;i++) h~ $& { 4[`[mE18. fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {5>3;. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 3 h#s([uL nStartPos,nEndPos,i); aiYo8+{!# Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); kEO1TS fileSplitterFetch.start(); _*Pfp+if } aC`Li^ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), IWQ&6SDW$z siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Bb~5& @M|N // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", cn$5:%IK nEndPos = " + nFileLength); My. dD'C // fileSplitterFetch[nPos.length-1].start(); C1 W>/?XC .>P~uZiX! !~WZ_z //等待子线程结束 C5Xof|#p| //int count = 0; 't7Z] G //是否结束while循环 qk&gA}qF boolean breakWhile = false; [6H}/_nD b7bSTFZxC _ j~4+H while(!bStop) J==}QEhQ{ { -TgUyv. write_nPos(); ^\MhT)x Utility.sleep(500); Yt{ji breakWhile = true; 5:c;RRn sc%dh?m7 `4LJ;KC( for(int i=0;i<nStartPos.length;i++) KGu= ; { `qE4U4 if(!fileSplitterFetch.bDownOver) qYiv { +$PFHXB breakWhile = false; Mq@}snp"S break; S/VA~,KCe; } Q\|18wkW } NEMEY7De2 if(breakWhile) HcA[QBh break; [<yz)<< PB+\jj 5C B%=iL{ //count++; !3h{lEB //if(count>4) #7o0dE;Kg9 // siteStop(); *<r%aeG$em } |CwG3&8
YZ<
NP 7aQn; System.err.println("文件下载结束!"); zrrz<dW } :9`qogF> catch(Exception e){e.printStackTrace ();} 4`s)ue } Ir/:d]N* \#++s&06 &U&Zo@ot"x //获得文件长度 (xL
:; public long getFileSize() ailG./I+ { +#~O'r]%GG int nFileLength = -1; j{)~QD ? try{ @ u+|=x]; URL url = new URL(siteInfoBean.getSSiteURL()); ZOu R"9] HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); eQ<xp A httpConnection.setRequestProperty("User-Agent","NetFox"); &Pq\cNYzW HyEa_9
"R23Pi int responseCode=httpConnection.getResponseCode(); LJWTSf"f? if(responseCode>=400) _dr*`yXi { frc{>u~t processErrorCode(responseCode); E67XPvo1+@ return -2; //-2 represent access is error E5gl ^Q?Z } 7/?DP wbx "Hht
g: 9 ZGV%Tw String sHeader; aM$=|%9/ wWTQ6~Y%d '0RRFO for(int i=1;;i++) "U{,U`@? { r1G8]a gO //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); oIb)
Rq!m //Utility.log(in.readLine()); Y
9i][ sHeader=httpConnection.getHeaderFieldKey(i); 0wFh%/: if(sHeader!=null) -L8YJ8J6 { D#jX6 if(sHeader.equals("Content-Length")) y"-{$ N
{ b
=b: nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader));
RL*]g* break; TT7PQf > } (B:uc_+ } {2:d`fqD else ]G*$W+G] break; DWrbp } ]_u`EvEx6 } Fg=v6j4W catch(IOException e){e.printStackTrace ();} o@3B(j;J` catch(Exception e){e.printStackTrace ();} /UHp [yod vLDi ; -NzTqLBn Utility.log(nFileLength); gI{ =0 <HF-2?` bMmra.x4L return nFileLength; 9|=nV|R'6 } B\[-fq 3gc"_C\$ %ek"!A //保存下载信息(文件指针位置) :B.G)M\ private void write_nPos() fhRjYYGI { Q#pnj thM try{ h<% U["
output = new DataOutputStream(new FileOutputStream(tmpFile)); ~<,Sh~Ana. output.writeInt(nStartPos.length); C3}Aq8$6 for(int i=0;i<nStartPos.length;i++) yp+F<5o { iyj3QLqE // output.writeLong(nPos); r6t&E%b output.writeLong(fileSplitterFetch.nStartPos); X NE+(Bt output.writeLong(fileSplitterFetch.nEndPos); }0;Sk(B> } Z`s!dV]e9 output.close(); )6{P8k4Zr } "w&/m}E,[ catch(IOException e){e.printStackTrace ();} B< hEx@
catch(Exception e){e.printStackTrace ();} gxmc| } S}cF0B1E* "IwM:v )0-o%- e //读取保存的下载信息(文件指针位置) m7m
\`; private void read_nPos() tD-gc''H { _whF^g8 try{ HO5d%85 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); G),db%,X2 int nCount = input.readInt(); Yy
h=G nStartPos = new long[nCount]; Hk u=pr3Gn nEndPos = new long[nCount]; ZEGd4_ux for(int i=0;i<nStartPos.length;i++) 0d4cE10 { 85z;Zt0{ nStartPos = input.readLong(); Tpzw=bC^ nEndPos = input.readLong(); wmYvD< } 31}W6l88c input.close(); Qra> }e%* } &{W^W8,% catch(IOException e){e.printStackTrace ();} 4seciz0? catch(Exception e){e.printStackTrace ();} f#P_xn&et } -H\,2FO \r;F2C0*i "}zda*z8 private void processErrorCode(int nErrorCode) &fSTR-8ev# { xl2g0? System.err.println("Error Code : " + nErrorCode); 1;Xgc@ } S$O,] @) +(mL~td01 "HC)/)Mv@ //停止文件下载 uTGcQs} public void siteStop() @~o`#$*| { 54q3R`y bStop = true; D{C:d\ e)$ for(int i=0;i<nStartPos.length;i++) J^ ={} fileSplitterFetch.splitterStop(); ce' TYkPM Km*<Kfcz lIh[|] } 7Fl-(Nv` } kon=il<@ //负责部分文件的抓取 Ei~f`{i **FileSplitterFetch.java ' qy#)F */ 0x5xLg;Q package NetFox; o.^y1mH' A]?^ H< 254~:eB0 import java.io.*; XDYosC: import java.net.*; 4*M@]J " El6bD% \G g$3>~D public class FileSplitterFetch extends Thread { te'*<HM Y&~M7TY b s'L?;:)dyB String sURL; //File URL wPnybb{ long nStartPos; //File Snippet Start Position B*,?C]0{ long nEndPos; //File Snippet End Position y $V[_TN int nThreadID; //Thread's ID 2jA%[L9d^ boolean bDownOver = false; //Downing is over (vQ+e boolean bStop = false; //Stop identical <v$QM;Ff FileAccessI fileAccessI = null; //File Access interface J&6:d BXhWTGiG cOku1g8 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ]W)
jmw'mo { \+Y!ILOI this.sURL = sURL; GDPo`#~ this.nStartPos = nStart; FFe)e>bH this.nEndPos = nEnd; SLoo:) nThreadID = id; \FifzKA fileAccessI = new FileAccessI(sName,nStartPos);//定位 DJP6TFT&G } {$fsS&aPg @ls.&BHUP jO)&KEh public void run() EXpSh} { *^h_z;{, while(nStartPos < nEndPos && !bStop) )}-$A-p# { @G GccF 2c:f<>r0y 9Nt3Z>d try{ \9/1L?@ URL url = new URL(sURL); /cY^]VLe HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~FUa:KYD httpConnection.setRequestProperty("User-Agent","NetFox"); k'+}92
o String sProperty = "bytes="+nStartPos+"-"; ,
Oli httpConnection.setRequestProperty("RANGE",sProperty); \0AiCMX[ Utility.log(sProperty); -x'e+zT nGrVw& J_xG}d InputStream input = httpConnection.getInputStream(); T:!MBWYe | //logResponseHead(httpConnection); 509Q0 [k QnKC#
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U+=|J byte[] b = new byte[1024]; )saR0{e0N int nRead; tWD|qg_ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 9?`RR/w { 'IQsve7cI nStartPos += fileAccessI.write(b,0,nRead); xb$yu.c //if(nThreadID == 1) yFM>T\@ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); OVs wt } dZ2`{@AYY 8$}OS- Oif,|: Utility.log("Thread " + nThreadID + " is over!"); #*,sa bDownOver = true; :oa9#c`L //nPos = fileAccessI.write (b,0,nRead); (5`T+pAsV } N z~"vi(t catch(Exception e){e.printStackTrace ();} `WlE|
G[ } /f3m)pT } #`/QOTnm2c @ {}rG8 3jPB#%F //打印回应的头信息 >oqZ !V5[ public void logResponseHead(HttpURLConnection con) |9,UaA { t26ij`V for(int i=1;;i++) ;f%|3-q1[ { p&3>
`C String header=con.getHeaderFieldKey(i); I/s.xk_i if(header!=null) P s#>y& //responseHeaders.put(header,httpConnection.getHeaderField(header)); kO ![X ^V Utility.log(header+" : "+con.getHeaderField(header)); R&So4},B else 3g'+0tEl break; a%K}j\M } )HVcG0H1 } QIA R D ,M@8h, M|%c(K#E,3 public void splitterStop() |.w;r
{ 8(A{;9^g bStop = true; uO'/|[`8 } ,sDr9h/'C3 ?q Xs- z="L4 } $D_HZ"ytu JR1*|u H/jm
f5 /* E`)Qs[?Gk **FileAccess.java dlD}Ub *//文件访问(定位,写) :p-Y7CSSu package NetFox; iJP{|-h import java.io.*; Z"tQpJg UqtHxEI%R~ _01Px a2. public class FileAccessI implements Serializable{ #nEL~& \A(5;ZnuD //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 #x~_`>mDN RandomAccessFile oSavedFile; _^T}_ long nPos; yGEb7I$h 9X]f [^ Q!$IQJ]|Y public FileAccessI() throws IOException D 'L{wm { #&siHHs \ this("",0); ;.s:X } og-]tEWA1 kaFnw(xa 8"M<{72U] public FileAccessI(String sName,long nPos) throws IOException C EqZ:c { r~oSP^e' oSavedFile = new RandomAccessFile(sName,"rw"); ct0v$ct>f this.nPos = nPos; f z%tA39m oSavedFile.seek(nPos); KXe
ka } ( V4G<-jG O5-;I,)H x!?Z*v@I public synchronized int write(byte[] b,int nStart,int nLen) 'F5)ACA% { :]c=pH int n = -1; F<r4CHfh; try{ ]kS7n@8 oSavedFile.write(b,nStart,nLen); q^Inb)FeN n = nLen; ]{Ek[Av } xIgql}. catch(IOException e) c]v
+ { :6u~aT/ e.printStackTrace (); kF-TG3 } :`J>bHE M=%!IT 0j$OE return n; hW%p#g; } FpzP#; `Bu9Nq D5`(} } *V|zx#RN p7UTqKi @L;C_GEa /* XS|mKuMcC **SiteInfoBean.java v3^t/[e~: */ f)^t') package NetFox; "Ot{^_e MPvWCPB qGa<@ b public class SiteInfoBean { KjYDFrR4 FpdHnu i1 }vD;DSz: private String sSiteURL; //Site's URL GP]TnQ<*; private String sFilePath; //Saved File's Path o+^Eu}[. private String sFileName; //Saved File's Name vYzVY\ private int nSplitter; //Count of Splited Downloading File `M rBav gj;@?o0 if@,vc public SiteInfoBean() /q*KO\L {//nSplitter的缺省值为5 ':sTd^V //default value of nSplitter is 5 P)IjL&[ this("","","",5); b~as64 } .e$%[)D 'w6hW7"L UE7'B?
public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) u]*5Ex (? { ysVi3eq sSiteURL= sURL; w_H2gaQ sFilePath = sPath; s##Ay{ sFileName = sName; ^
LbGH<#J this.nSplitter = nSpiltter; ohplj`X[21 z8tl0gd%D ,'_(DJX } 0||F`24 b,Lw7MY}[ kW(Kh0x public String getSSiteURL() A'~#9@l< { %M6
c0d[9- return sSiteURL; C8MWIX} } jGiw96,Y 4:`[q E3 raHVkE{< public void setSSiteURL(String value) 2Oi' E { Y^3)!> sSiteURL = value; $_bZA;EMQ } $rTu6(i1 6$(0Ty 5Hy3\_ + public String getSFilePath() >[P%Ty); { l/F!Bq[*g return sFilePath; -lnevrl } +"Ub/[J{G1 + !xu{2 ! @<5Tba>SC public void setSFilePath(String value) sDAK\#z { k}<<bm*f sFilePath = value; 2_N/wR#=& } w&C1=v -h k-vA# f?5A"-NS public String getSFileName() e&ts\0 { +9_ ,w bF return sFileName; '$*[SauAG } D&f!( n %r P ! WP!il(Gr public void setSFileName(String value) F-tFet
{ dm 2EH sFileName = value; 9.]kOs_ } `fMpV8vv ()B7(Y 9R>~~~{-Go public int getNSplitter() r},lu=em { !"%S#nrL$ return nSplitter; vlAy!:CV } a_AJ)4 2$Wo&Q^_ Onyh1 public void setNSplitter(int nCount) {yU0D*#6 { cTy'JT7 nSplitter = nCount; =G*z
53 } :i}@Br+R7L } D=JlA~tS> k|5k8CRX +8eVj#N /* o
Fi) d[` **Utility.java I<KCt2:X */ ovSH}h! package NetFox; "G@E6{/ EFD?di)s #XfT1 public class Utility { Yq{jEatY{/ CMFC"e Se |lY`9-M`I public Utility() Z) t{JHm: { #:Xa'D+ Z]7tjRvq) ] .`_,
IO } k3#wLJ yduuFK //线程睡眠 wZ
O@J| public static void sleep(int nSecond) ^t7_3%%w { 7<vy;"wB try{ !9PX\Xbn Thread.sleep(nSecond); *iYMX[$ } ,,7.=# catch(Exception e) l*qk1H"g { w~p4S+k& e.printStackTrace (); sc9]sIb } OFp#<o,p } $8=(I2&TW my]P_mE //日志 hj+p`e S public static void log(String sMsg) :Fc8S9 { N7a[B>+` System.err.println(sMsg); 51z / } 3#B@83C0Z fH; |Rm t={po QC~ public static void log(int sMsg) +<z7ds{Z { fs7~NY System.err.println(sMsg); :ET x*c } 8pd&3G+ } k~& o *XHj)DC; 50COL66:7 /* J#+Op/mmo **TestMethod.java *Q0lC1GQ */ sFCf\y package NetFox; @}ZGY^ + 2OZJVJ {({
R: !c public class TestMethod { !eV^Ah>PZ Zi
ma^IL 4bE42c=Ca7 public TestMethod() ]bf' { ///xx/weblogic60b2_win.exe 7bHE!#L`0 try{ =%xIjxYl SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); O0->sR //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); "--/v. Cs SiteFileFetch fileFetch = new SiteFileFetch(bean); *u58l(&`8 fileFetch.start(); ]Kof sU_{ } ykJ+%gla catch(Exception e){e.printStackTrace ();} .x]'eq} g~eJ
YS, av"Dljc } dP?nP(l *q+oeAYX Ct-rD79l public static void main(String[] args) N!]PIWnC { ,nI_8r"M> new TestMethod(); \A` gK\/h } :{x!g6bK@ } t$tsWAmiA[ 点击下载更多相关资料
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