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/* FxfL+}?Q **SiteFileFetch.java @vQa\|j */ GzFE%< 9F package NetFox; ,<3uc import java.io.*; Hl3)R*&'J import java.net.*; 3u*hTT UQ3@@:L_ kwHqvO!G public class SiteFileFetch extends Thread { g(<T u^F 7B(bH8 `4%;qLxngP SiteInfoBean siteInfoBean = null; //文件信息Bean `\jTpDV_W long[] nStartPos; //开始位置 ISS\uj63M long[] nEndPos; //结束位置
s8_aL)@f FileSplitterFetch[] fileSplitterFetch; //子线程对象 |=cCv_y long nFileLength; //文件长度 zBt`L,^ boolean bFirst = true; //是否第一次取文件 BMNr<P2li boolean bStop = false; //停止标志 *AH^%!kVP File tmpFile; //文件下载的临时信息 [8@kx Cq DataOutputStream output; //输出到文件的输出流 \E@s_fQ] 7':f_] //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) h}|6VJ@. public SiteFileFetch(SiteInfoBean bean) throws IOException |qlS6Aln { x=5P+_ siteInfoBean = bean; e8WEz
4r_ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); L}W1*L$;< tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); qWO]s=V! if(tmpFile.exists ()) wn+j39y?ZY { 's[BK/ bFirst = false; W7L+8LU; read_nPos(); mP pvZ } @H\pipT_b else Y}LLOj@L { tqf&N0*
nStartPos = new long[bean.getNSplitter()]; i-,D_ nEndPos = new long[bean.getNSplitter()]; d=XpO*v,[ } BR36}iS;V 2QGMe} b,s Gq wmo{YS3t| } 2@ 9pr >?5xDbRj Sty!atEWT public void run() jJ
aV { *bA+]&dj\ //获得文件长度 R-pH Quu3 //分割文件 u 1ZJHry //实例FileSplitterFetch mX&xn2}qZ" //启动FileSplitterFetch线程 Hz?!BV0 //等待子线程返回 P8wy*JvT try{ H`m:X,6} if(bFirst) [$l"-*s4 { TZ_rsj/t nFileLength = getFileSize(); `c"4PU^ if(nFileLength == -1) Yb[n{.%/g { zF5q=9 4$ System.err.println("File Length is not known!"); Gg%tVQu } 84=-Lw else if(nFileLength == -2) yo'9x
s { dhHEE|vrz System.err.println("File is not access!"); M8';%=@ } G02ox5X else !4R>O6k { ~G>jw"r for(int i=0;i<nStartPos.length;i++) bj@xqAGl { Q,.By& nStartPos = (long)(i*(nFileLength/nStartPos.length)); yl-fbYH } iJdP>x for(int i=0;i<nEndPos.length-1;i++) Ly9Q}dL { 3Y
z]8`C nEndPos = nStartPos[i+1]; .^i<xY } z% V* K nEndPos[nEndPos.length-1] = nFileLength; DVI7]+=nV } ITyzs4"VV } !?nu? EeCFII iTh
xVD //启动子线程 H]s4% 9T fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; #?9Q{0e for(int i=0;i<nStartPos.length;i++) uBmxh%]C~ { bV@7mmz:X+ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Wo{K} siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), I:#Ok+ nStartPos,nEndPos,i); :pwa{P Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3bH~';< fileSplitterFetch.start();
tPA:_ } p8=|5. // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Qyz>ZPu}sz siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); {XtoiI // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 0[/vQ+O ]2 nEndPos = " + nFileLength); -kl;!:'.3 // fileSplitterFetch[nPos.length-1].start(); A 4j<\xL $uCiXDKCq XaW4C-D& //等待子线程结束 tBseqS3< //int count = 0; a/~29gW8E\ //是否结束while循环 uPkb, :6~Z boolean breakWhile = false; `<^*jB@P u_.HPA 6xarYh( while(!bStop) ASW4,% cl { ivfXat- write_nPos(); cC%j!8! Utility.sleep(500); jYWw.g< breakWhile = true; e*:}$u8a {"m0)G,G f&ytK for(int i=0;i<nStartPos.length;i++) =}v ;1m { WSLy}@`Vx if(!fileSplitterFetch.bDownOver) :uo[&&c { UfR~%p>K breakWhile = false; H`-=?t break; MiJ6 n[iv } qD-fw-,: } ?E<c[*F05 if(breakWhile) V&i2L.{G) break; .+yW%~0 R)+t]} R}r~p?(M //count++; "jR]MZ //if(count>4) HzvlF0f // siteStop(); ,=|4:F9
} Vl<9=f7[ ne4c%?>t H4:ZTl_$ System.err.println("文件下载结束!"); QR"bYQ } =&Xdm( catch(Exception e){e.printStackTrace ();} 0|XKd24BN } =Vb~s+YW ,
T\- ;7 ~c*
UAowS //获得文件长度 bLbR IY"l public long getFileSize() s<vs:jna { t`5j4bdG int nFileLength = -1; zAs&%OjG try{ ;W{b $k@g URL url = new URL(siteInfoBean.getSSiteURL()); MzzKJ;wbC6 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 9#k0_vDoW httpConnection.setRequestProperty("User-Agent","NetFox"); CISO<z0 #Qh>z%Mn^3 dl0FQNz8@B int responseCode=httpConnection.getResponseCode(); - $JO8'TP if(responseCode>=400) b,@aqu { %d;<2b0 processErrorCode(responseCode); tnb$sulc+ return -2; //-2 represent access is error .9h)bf+ } 5G(E&>~ k_aW DM),|Nq" String sHeader; {.CMD9F[ uWjU OJEe C\Vg{&' for(int i=1;;i++) .Evy_o\^ { Izo! rC //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); %NajFjBI //Utility.log(in.readLine()); bik*ZC?E sHeader=httpConnection.getHeaderFieldKey(i); K2rzhHfb if(sHeader!=null) T8XY fcc*h { 3o6RbW0[
if(sHeader.equals("Content-Length")) $`ztiVu3 { ?6P.b6m}0 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); jL>:>r break; 1 ] #9
} K
|*5Kwi } G[Tl%w else gU1 #`r>[) break; CO^Jz } cCiI{ } ~R]35Cp-# catch(IOException e){e.printStackTrace ();} "A3dvr catch(Exception e){e.printStackTrace ();} :%X Ls, S8vV!xO E m{aM Utility.log(nFileLength); XOy2lJ/ }Ln@R~[ ,gx)w^WTm return nFileLength; 3[IJhR[ } 9}P"^N ^6;V}2>v} 1;lmu]I>) //保存下载信息(文件指针位置) qp p/8M private void write_nPos() M \D]ml~ { ;inzyFbL= try{ %Mn.e a output = new DataOutputStream(new FileOutputStream(tmpFile)); 1n=_y o output.writeInt(nStartPos.length); L":bI&V?: for(int i=0;i<nStartPos.length;i++) H !)=y { x_MJJ(q8g // output.writeLong(nPos);
CN& output.writeLong(fileSplitterFetch.nStartPos); *>q/WLR output.writeLong(fileSplitterFetch.nEndPos); Bh]!WMAw. } 'Ot,H_pE output.close(); Yu3zM79'k } /rc%O*R catch(IOException e){e.printStackTrace ();} $m| V :/ catch(Exception e){e.printStackTrace ();} v;EQ, NL } -db75= \3XqHf3|o >mq,}!n //读取保存的下载信息(文件指针位置) mD58T2Z private void read_nPos() jd-glE,Y/ { F<&!b2)ML try{ LnsD DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ;xYNX
int nCount = input.readInt();
CE%_A[a nStartPos = new long[nCount]; ?]O7Ao nEndPos = new long[nCount]; kv{}C)kt3 for(int i=0;i<nStartPos.length;i++) ?>
Dtw#} { g);^NAA nStartPos = input.readLong(); hJ;$A*Y nEndPos = input.readLong(); EbY,N:LK } 'gMfN input.close(); ,&^3Z } ,)FdRRj catch(IOException e){e.printStackTrace ();} aA'TD:&p1 catch(Exception e){e.printStackTrace ();} B4Y(?JTx } #*%q'gyHT vH[47Cv G5 Nw_@A8-r private void processErrorCode(int nErrorCode) #qBr/+b {
nY%5cJ`" System.err.println("Error Code : " + nErrorCode); +IFw_3$ } XGrue6ya t=
#&fSR S$q=;" //停止文件下载 AyKMhac public void siteStop() NAC_pM&B { fwR_OB:$ bStop = true; 7- d.ZG for(int i=0;i<nStartPos.length;i++) <O<LYN+( fileSplitterFetch.splitterStop(); (!L5-8O 4u;9J*r4 */qtzt } YIRZ+H<Q } ~uWOdm-"[ //负责部分文件的抓取 13k
!'P **FileSplitterFetch.java (2ot5x}`j */ Sjj>#}U package NetFox; =8Jfgq9E =T?}Nt /phX'xp import java.io.*;
-fI`3# import java.net.*; 7cDU2l {Azn&|%.t LpbsYl public class FileSplitterFetch extends Thread { v X~RP
* DTRJ/@t o G*5f String sURL; //File URL G3P&{.v long nStartPos; //File Snippet Start Position /6uT6G+(z} long nEndPos; //File Snippet End Position LkruL_E> int nThreadID; //Thread's ID CqMhk boolean bDownOver = false; //Downing is over Cwa^"r3P1 boolean bStop = false; //Stop identical (& "su3z FileAccessI fileAccessI = null; //File Access interface ipnV$!z yOU(2"8p 2jJmE&)7, public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException B Xms;[ { hg.#DxRi{ this.sURL = sURL; ^nJyo:DO; this.nStartPos = nStart; ?Ea;J0V this.nEndPos = nEnd; 5zJj]A nThreadID = id; ^FmU_Q0 fileAccessI = new FileAccessI(sName,nStartPos);//定位 "Mw[P [w* } 7"F*u : Ks^6.) v4,h&JLt public void run() (_kp{0r# { g,tjm( while(nStartPos < nEndPos && !bStop) Pt:e!qX) { RcG0 8p.) -H^oXeN E907fX[R~ try{ Ix@&$!'k URL url = new URL(sURL); >zsid: HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
/-_=nf}w httpConnection.setRequestProperty("User-Agent","NetFox"); (
9!k# String sProperty = "bytes="+nStartPos+"-"; h+p*=|j` httpConnection.setRequestProperty("RANGE",sProperty); {^mNJ Utility.log(sProperty); {e[%;W%c& =!O*/6rz <U5wB]] InputStream input = httpConnection.getInputStream(); uzmk6G
v //logResponseHead(httpConnection); 4'j
sDcs 8KB>6[H!wE jUv!9Y}F byte[] b = new byte[1024]; 4(e59ZgY int nRead; =L%DX#8 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) kIw`P[ { [${
QzO nStartPos += fileAccessI.write(b,0,nRead); MObt,[^W //if(nThreadID == 1) 'j^xbikr // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]V %.I_ } WARb"8Kg }I|u'#n_ ;k"Bse!/ Utility.log("Thread " + nThreadID + " is over!"); iLP7!j bDownOver = true; 9CA^B2u //nPos = fileAccessI.write (b,0,nRead); UDhG : } =9oPowq catch(Exception e){e.printStackTrace ();} 2"|2a@ } p.ANVA@: } B\J^=W+` V@>r*7\F GRb*EeT //打印回应的头信息 ] h-,o
R?e public void logResponseHead(HttpURLConnection con) q)H1pwxD { ?88[|;b3 for(int i=1;;i++) .)}@J5P) { /V3=KY`_J String header=con.getHeaderFieldKey(i); Q9I
j\HbA" if(header!=null) WLF0US' //responseHeaders.put(header,httpConnection.getHeaderField(header)); 8^Hn"v Utility.log(header+" : "+con.getHeaderField(header)); }I3gU else G+B~Ix- break; Z3>N<u8) } a#mNE*Dg } X37 L\e[c ,yd
MU\so( FX9F"42@ public void splitterStop() SH*C" { aQI^^$9g bStop = true; `D9]*c
!mO } :4~g;2oag <;E `_b`kzJ } ;Yi4Xva@ )jq?lw'& 0sI1GhVR /* y=In?QN{6* **FileAccess.java M?= ;JJ: *//文件访问(定位,写) da1]mb=4 5 package NetFox; *),8PoT import java.io.*; OB[o2G <0 'n<iU st y5Tlpi`g public class FileAccessI implements Serializable{ GUF"<k Bo<>e~6P //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 D:Q
21Ch RandomAccessFile oSavedFile; IbcZ@'RSw long nPos; >^Se'SE] -n'F v@U )c l5B{1P public FileAccessI() throws IOException aM7uBx\8 5 { >A0k 8T this("",0); RI68%ZoL } sXd8rj:o gN)c ;raN public FileAccessI(String sName,long nPos) throws IOException e/->_T(I { -P&6L\V oSavedFile = new RandomAccessFile(sName,"rw"); h3T9"w[ this.nPos = nPos; 9f\/\L oSavedFile.seek(nPos); \rVQQ|l } 7'
S @3 =)hVn 3!5Ur& public synchronized int write(byte[] b,int nStart,int nLen) O?<&+(uMTT { _EF&A-kX|u int n = -1; WK="J6K5 try{ *^([ ~[ oSavedFile.write(b,nStart,nLen); ',GS#~ n = nLen; 4t)%<4 } Q}S_%I}u: catch(IOException e) }(egMx;"3J { k</%YKk e.printStackTrace (); s?ko?qN( } $T :un.TM -l%J/ : |+`c3*PV return n; ~rjTF! } 5OoN!TEM z>w`ZD}XY N)&4Hy } CRbdAqofV fX
jG5Tv ho>k$s? /* QdLYCR4f **SiteInfoBean.java 5e
sQ; */ *xp\4;B
package NetFox; iS5W>1] kD bhu^~B hDV20&hq public class SiteInfoBean { :>itXD! "zIFxDR# %F kMv private String sSiteURL; //Site's URL v\`9;QV5 private String sFilePath; //Saved File's Path 1 { , F private String sFileName; //Saved File's Name J[^}u_z private int nSplitter; //Count of Splited Downloading File "_2Ng<2
:ujCr. TNQP"9[? public SiteInfoBean() s}pIk.4ot! {//nSplitter的缺省值为5 5MzFUv0) //default value of nSplitter is 5 uUKcB: this("","","",5); V21njRS } YDGS}~m~Q IF]lHB Cuc$3l(% public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Agrp(i"\@ { OLI$1d_ sSiteURL= sURL; eHDef sFilePath = sPath; hK<5KZ/4 sFileName = sName; QJ|a p4r this.nSplitter = nSpiltter; e)E$}4 +nQw?'9Z ^!q?vo\j| } z"*/mP2 7z~_/mAI r[?1 public String getSSiteURL() h[Gg}N! { \P1=5rP return sSiteURL; Dde]I_f} } M4xi1M#% N25V] ;;A2!w{}[i public void setSSiteURL(String value) 97)/"i e { m[k_>e\u sSiteURL = value; Kt0(gQOr0 } ?'"X"@r5 7mm1P9Z f-nz{U public String getSFilePath() .k[o$z\EkF { .5!t:FPOv return sFilePath; gl).cIp w } <w\:<5e ' 0| ;
.6\ K!,<7[MBg public void setSFilePath(String value) l|5fE1K9U { (@WA1oNG sFilePath = value; NAPX_B,6 } :6q]F<oK >[6{LAe~hp ?bw4~ public String getSFileName() KR"M/# { Xv@SxS-5l return sFileName; L4L2O7 } r]ShZBAbYp U.{l;EL:T Ma|qHg public void setSFileName(String value) I}2P>)K { P9T5L<5 sFileName = value; .Yw'oYnS } F ]O$(7* ZtHm\VTS lD{Aa!\ public int getNSplitter() 1wW)tNKIF { [=%TnT+^9 return nSplitter; _20#2i& } vy,&N^P $)H@|<K ;60.l! public void setNSplitter(int nCount) R/`q/0T. { Y
wkyq>Rv nSplitter = nCount; p\{-t84n } bqQq=SO } OCy0#aPRS BnRN;bu E\m5%bK\B /* M,}|tsL **Utility.java c]B$i*t */ -YD+(c`l package NetFox; N8`?t5 Z0De!?ALV\ XlI!{qj| public class Utility { R}mn*h6 8>/Q1(q0 #P#-xz public Utility() 1
y}2+Kk { ! Q<>3xZ 8.bKb<y m?HZ; } 7=]i~7uy flgRpXt //线程睡眠 +\Q?w?DE| public static void sleep(int nSecond) m*X[ Jtr { <}6{{&mT4 try{ Jgu94.;5 Thread.sleep(nSecond); 1c+]gIe } {YUIMd!Y catch(Exception e) !EQ@#qW/ { 3sCFHn#c e.printStackTrace (); 5X.e*; } fJZp?e" } 0b91y3R+ (Toq^+`c //日志 e"r)R8 public static void log(String sMsg) wB>r(xQ' { L!_ZY System.err.println(sMsg); ;v } jEXW DP/J(>eG
$hxNhI public static void log(int sMsg) #E0t?:t5bk { V0nn4dVO System.err.println(sMsg); 2k6 X, } OdI\B } Hx$c
N
htY=w}> C6_@\&OA /* .k4W_9 **TestMethod.java `bKA+c,f */ e4OeoQ@ > package NetFox; _ .i3,-l) ;d$qc<2uA VGL#!4wK public class TestMethod { ~"Gf<3^y+ ]\RRqLDzkg FZiW|G public TestMethod() A|}l)!% { ///xx/weblogic60b2_win.exe )Z+{|^`kJ try{ 2}?wYI*:5| SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); I &* _,d //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); YJxw 'U
>P SiteFileFetch fileFetch = new SiteFileFetch(bean); Ff^@~X+W< fileFetch.start(); p#f+P? } ;DnUQj catch(Exception e){e.printStackTrace ();} G= ^X1+_ +*oS((0s d+iR/Ssc } e7u^mJ ZV}X'qGaq _B2V "p public static void main(String[] args) >*twTlb{ { #sKWd new TestMethod(); m"c :"I6 } TaJB4zB } 2S`?hxAL 点击下载更多相关资料
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