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/* vUe
* **SiteFileFetch.java J+jmSK%z */ Cfo 8gX* package NetFox; Lo5@zNt%W import java.io.*; y[6&46r7D import java.net.*; jUvA<r L~y t AZ, 'h>5&=r public class SiteFileFetch extends Thread { puN=OX}C M5WtGIV
/1~|jmi( SiteInfoBean siteInfoBean = null; //文件信息Bean 'QojSq
long[] nStartPos; //开始位置 ,G|aLBn long[] nEndPos; //结束位置 5;8B!%b FileSplitterFetch[] fileSplitterFetch; //子线程对象 \K~fRUo]=c long nFileLength; //文件长度 ;c
Co+( boolean bFirst = true; //是否第一次取文件 #0hNk%X= boolean bStop = false; //停止标志 "%''k~UD4 File tmpFile; //文件下载的临时信息 dyiEK)$h DataOutputStream output; //输出到文件的输出流 "C.7;Rvkp> X2dc\v.x //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ^y0C5Bl; public SiteFileFetch(SiteInfoBean bean) throws IOException [Cj)@OC { !{tiTA siteInfoBean = bean; )9L pX //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); F4E3c4
81 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); rjHIQC C if(tmpFile.exists ()) uk[< 6oxz { $KWYe{# bFirst = false; kgapTv>q read_nPos(); Fra>|;do } 76A>^Bs\/ else "lz[zFnO { Secq^#]8 nStartPos = new long[bean.getNSplitter()]; xVkTRCh nEndPos = new long[bean.getNSplitter()]; {XD/8m(hN| } S=H_9io =lC;^&D-0/ hMeqs+ h@;)dLo0z } 1i /::4= ~,*YmB=Z T<+ht8&M8 public void run() I+"?,Ej$K { Th^(f@.w //获得文件长度 N^
s!!Sbpq //分割文件 p&sK\ //实例FileSplitterFetch dG-or //启动FileSplitterFetch线程 XQ3* //等待子线程返回 QhXC>)PW try{ H8$<HhuZM if(bFirst) S1^nC tSF { /ggkb8<3 nFileLength = getFileSize(); Bug}^t{M if(nFileLength == -1) YYE8/\+B. { hkwa ""- System.err.println("File Length is not known!"); {!}F
:~*r } w^])( else if(nFileLength == -2) qfGtUkSSb { 6`qr:. System.err.println("File is not access!"); Q:kVCm/; } i&pJg1 else 6b]1d04hT { ZEj!jWP2m for(int i=0;i<nStartPos.length;i++) /MKNv'5&!% { 0SMQDs5j nStartPos = (long)(i*(nFileLength/nStartPos.length)); w3=)S\ } FL`1yD^2 for(int i=0;i<nEndPos.length-1;i++) Xqg.kX { XpgV09.EE nEndPos = nStartPos[i+1]; d]CviQUq } UW hn1N nEndPos[nEndPos.length-1] = nFileLength; NFY|^*bll } m0|Ae@g~3 } Zj1ZU[BEcL J3~hzgY f2 ydL/M, //启动子线程 0L:V#y-* fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; lmhbF for(int i=0;i<nStartPos.length;i++) 1Y=AT!"V { eu}Fd@GO fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &nqdl+|G* siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), .]j#y9>&w% nStartPos,nEndPos,i); #9$V
08 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); +ze}0lrEL fileSplitterFetch.start(); CF|moc:; } m<4s*q0\i // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), V$dJmKg siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); G@!_ZM8h // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", g\o{}Q%X nEndPos = " + nFileLength); xd^&_P$= // fileSplitterFetch[nPos.length-1].start(); 'Aj(i/CM >f\zCT%cf -BA"3 S //等待子线程结束 ~$4]HDg //int count = 0; -`!_h[ //是否结束while循环 B2~f;zy` boolean breakWhile = false; h; 'W :P
F0&~ ?2nG )L |tn while(!bStop) {)B9Z
I{+A { uxa=KM1H write_nPos(); g7xbyBo7 Utility.sleep(500); +/y{^}b/ breakWhile = true; xLx"*jyL S3uyn78hI >|a\>UgC for(int i=0;i<nStartPos.length;i++) 3 ppuQQ { yS[z2:! if(!fileSplitterFetch.bDownOver) ]3L@$`ys { of8mwnZR breakWhile = false; 3`58ah break; ;>9OgO } ^^G-kg } .OmQ' if(breakWhile) ?k{|Lk break; L5Urg*GNL -<Jq 4~O6$;!|~ //count++; Zc-#;/b3T //if(count>4) GAv)QZyV$ // siteStop(); S8O)/Sg= } 9>N\sOh nVxq72o@ Rl_.;?v"! System.err.println("文件下载结束!"); 8+"10q- } /61by$E catch(Exception e){e.printStackTrace ();} LGIalf*7 } ispkj' Z'Kd^`mt 9 7}Bj|]b)~ //获得文件长度 }>V/H]B public long getFileSize() MZT6g. ny { a3Y{lc#z} int nFileLength = -1; )ZHc$+fU try{ &yE1U#J( URL url = new URL(siteInfoBean.getSSiteURL()); $+Vmwd; HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); '!!e+\h# httpConnection.setRequestProperty("User-Agent","NetFox"); Sv7 i! j Mx8Gu^FW.d On=u#DxQ int responseCode=httpConnection.getResponseCode(); DU;[btK> if(responseCode>=400) I*Vt,JYx { %N)e91wC processErrorCode(responseCode); VCjq3/[_ return -2; //-2 represent access is error B&?fM~J } H+a~o=/cR k({2yc#RD& q( IZJGb String sHeader; :$=|7v - %|P *z q .C for(int i=1;;i++) 5MxH)~VQoM { {>@QJlE0 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ! .AhzU1%Y //Utility.log(in.readLine()); %JQ~!3 sHeader=httpConnection.getHeaderFieldKey(i); Va7c#P? if(sHeader!=null) ~L bS~_\C= { O#Z/+\U if(sHeader.equals("Content-Length")) -I ?z-?<D { Y]N~vD nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); }|Uj"e break; t05_Px!mW } RdgVBG#Z1 } X8Xn\E else VJDoH break; v
dU%R\ } a9=> r } ob
E:kNE9 catch(IOException e){e.printStackTrace ();} OkpwhkPL5 catch(Exception e){e.printStackTrace ();} q +R*Hi #$FrFU;ZR ;o[rQ6+ Utility.log(nFileLength); FEF"\O|Q +{.780| _.{zpF=j return nFileLength; ,h^r:g } o@9+mM"B) :\b|dvI< O|I+], //保存下载信息(文件指针位置) bKMWWJf*' private void write_nPos() ZqQ*}l5 { Stxp3\jEn try{ O$qtq(Q% output = new DataOutputStream(new FileOutputStream(tmpFile)); xvmt.> f output.writeInt(nStartPos.length); ;L~p|sF for(int i=0;i<nStartPos.length;i++) BC! 6O/kr { U\jb" // output.writeLong(nPos); t<63 8`{kk output.writeLong(fileSplitterFetch.nStartPos); )JhT1j Qc output.writeLong(fileSplitterFetch.nEndPos); %<}<'V0 } E1 |<Pt output.close(); lpy:3`ti } S8" f]5s catch(IOException e){e.printStackTrace ();} QXVC\@ catch(Exception e){e.printStackTrace ();} h?Nek+1' } OQp, 3M{_ +-BwQ{92[: #DFp[\)1 //读取保存的下载信息(文件指针位置) B+] D5K private void read_nPos() =dzWmL<~8 { nPFwPk8=M try{ J;}3t! DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); c8Z A5| int nCount = input.readInt(); D!F 2l_ nStartPos = new long[nCount]; ^m!_2_q nEndPos = new long[nCount]; <*(^{a.O for(int i=0;i<nStartPos.length;i++) &!L:"]=+ { h2~4G)J nStartPos = input.readLong(); \X|sU:g nEndPos = input.readLong(); iWA|8$u4gm } C ^w)|2o} input.close(); ]$A(9Pn" } ]~0}=,H$N catch(IOException e){e.printStackTrace ();} !GwL,)0@^ catch(Exception e){e.printStackTrace ();} g(Yb^'X/ } Sk}{E@ S6xgiem /<Ld'J private void processErrorCode(int nErrorCode) G[,Q95`w?< { >C r\y System.err.println("Error Code : " + nErrorCode); 3jZ6kfj } Y32 "N[yw R=]d%L8 xQ4%e[/ //停止文件下载 u92^(| public void siteStop() xSMt*]=9 { 5/MKzoB bStop = true; ^D{lPu
3 for(int i=0;i<nStartPos.length;i++) -/P\"c fileSplitterFetch.splitterStop(); .}B(&*9,v X4|4QgY x =q;O+7] } ~" i0x } 1}%B%*N //负责部分文件的抓取 T{+Z(L **FileSplitterFetch.java B<?wh0 */
3Ot~!AlR package NetFox; RY9V~8|M c{3wk7 E"~2./+rd import java.io.*; qS|\JG import java.net.*; T>`74B: QHq,/kWY 72W
s
K" public class FileSplitterFetch extends Thread { O%8 EZyu 9(4&KZpK R?o$Y6}5 String sURL; //File URL c!K]J long nStartPos; //File Snippet Start Position *Hz^K0:8( long nEndPos; //File Snippet End Position f+_h !j int nThreadID; //Thread's ID Z?5V4F:f boolean bDownOver = false; //Downing is over =O).Lx2J boolean bStop = false; //Stop identical "A$!,
PX6 FileAccessI fileAccessI = null; //File Access interface t. ='/`!N **3 z;58i 9iUr nG* public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException q
11IkDa { )3Z ^h<"j this.sURL = sURL; T~0k"uTE this.nStartPos = nStart; (xHf4[[u this.nEndPos = nEnd; u&mS8i} nThreadID = id; @a:>$t fileAccessI = new FileAccessI(sName,nStartPos);//定位 wMqX)}> } ?iI4x%y eqw0]U\pv a`[uNgDO public void run() a2'^8;U*_ { L|P5=/d while(nStartPos < nEndPos && !bStop) ^.dsW0"0 { &|3
$!S scLn= fC,:{} try{ t3(]YgF URL url = new URL(sURL); J &pO%Q=b HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); FC i U httpConnection.setRequestProperty("User-Agent","NetFox"); [I!6PGx String sProperty = "bytes="+nStartPos+"-"; 2EZb
)&Q httpConnection.setRequestProperty("RANGE",sProperty); Y2o?gug Utility.log(sProperty); $6OkIP. WmY`` ~cTN~<{dq InputStream input = httpConnection.getInputStream(); +_XzmjnDd //logResponseHead(httpConnection); .Asv%p[W Lzu.)C@Amx ho##Z*O byte[] b = new byte[1024]; )E@A0 W int nRead; @=}YTtq while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) r\qj! { W`\R%>$H nStartPos += fileAccessI.write(b,0,nRead); C{gyj}5 //if(nThreadID == 1) v\m ]A1 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); =R*qP ;# } 79`AM
X[b MrZh09y t2,A@2DU2 Utility.log("Thread " + nThreadID + " is over!"); +s- lCz bDownOver = true; h4q|lA6!k8 //nPos = fileAccessI.write (b,0,nRead); z!l.:F } .pvi!NnL- catch(Exception e){e.printStackTrace ();} oE#d,Z } ?c[*:N( } o.0ci+z@ WI?oSE w u%w`:v7Yo( //打印回应的头信息 At-U2a#J{ public void logResponseHead(HttpURLConnection con) $s9Vrw0Z { {r@Ty*W}
L for(int i=1;;i++) gw,UQbnu { ma"3qGy String header=con.getHeaderFieldKey(i); ]IoUwg pI) if(header!=null) h }B%
/U //responseHeaders.put(header,httpConnection.getHeaderField(header)); >}+/{(K"E| Utility.log(header+" : "+con.getHeaderField(header)); 6Yx4lWBR? else .Fdgb4>BXX break; :2
*g~6 } l
c+g&f } 9 FB19 -r-k_6QP ^J$2?!~ public void splitterStop() R8ZK]5{o { spt6]"Ni bStop = true; rg^'S1x| } e" St_z( j'A_'g'^ dBz/7&Q } 7=;R& mqC D9
g#Ff6 :]\([Q+a /* eEuvl`& **FileAccess.java <StN%2WQ1 *//文件访问(定位,写) .&DhN#EN0 package NetFox; 9I}-[|`u import java.io.*; ,6-:VIHQ Wk)OkIFR U4d:] z public class FileAccessI implements Serializable{ vN`klDJgW[ ibj87K //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 vX/T3WV
RandomAccessFile oSavedFile; A"L&a
l$i long nPos; gt@m?w( -*1J f& #qK:J;Sn3 public FileAccessI() throws IOException |y(Q { f&Gt| this("",0); }H^+A77v } KV(Q;~8"X >CHrg]9 lhy*h_> public FileAccessI(String sName,long nPos) throws IOException
!2ZF(@C/ { 4 o Fel.o oSavedFile = new RandomAccessFile(sName,"rw"); %nf6%@s this.nPos = nPos; 1`=nWy=' oSavedFile.seek(nPos); k$blEa4 } sB7#
~pA i<#QW'R ( .%xn&3 public synchronized int write(byte[] b,int nStart,int nLen) A1O'|7X { MN\HDKN int n = -1; 4K\G16'$v try{ 8Vr%n2M oSavedFile.write(b,nStart,nLen); o~`/_+ n = nLen; pH9VTM.* } \NPmym_6J catch(IOException e) `sn^ysp { 4h|c<-`>t e.printStackTrace (); !LNayk's> } +S o4rA*9 Ayxkv)%:@) 6^]+[q}3 return n; !|^|,"A) } c2l@6<Ww 0XE4<U eA2@Nkw~) } %)1y AdG
8 -|$@-fY; bCRV\myd` /* ,E S0NA **SiteInfoBean.java C5o#i*| */ Y]'Z7<U}*E package NetFox; Va"0>KX <^#,_o,! ;U/&I3dzV public class SiteInfoBean { ag [ZW */`ki;\A ]d$8f private String sSiteURL; //Site's URL +$ 'Zf0U private String sFilePath; //Saved File's Path hOjk3
k private String sFileName; //Saved File's Name j#!IuH\] private int nSplitter; //Count of Splited Downloading File cr7 }^s Tp?7_}tRi 6m}Ev95 public SiteInfoBean() rV ` #[d {//nSplitter的缺省值为5 J,'M4O\S //default value of nSplitter is 5 'j#*6xD this("","","",5); C0T;![/4A } (KjoSN(
K igCZ|Ru\ W=N+VqK public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) |jGf<Bf5 { Ia SR;/ sSiteURL= sURL; <FV1Wz sFilePath = sPath; G#ZH.24Y sFileName = sName; <sb~ ^B this.nSplitter = nSpiltter; L>jY.d2w=K L+b6!2O, X_q\S g } q+yQwX{ f\|w' n@<YI public String getSSiteURL() }|h# \$w { Ua:}V n&! return sSiteURL; I fK,b*% } &GpRI(OB/+ P78g/p T @ a! #G public void setSSiteURL(String value) Dj"F\j 1 { Wf+cDpK sSiteURL = value; `KZm0d{H } 5'OrHk;u G30-^Tr %z=le7 public String getSFilePath() E>6MeO { zVViLUwG return sFilePath; 5%Y3 Kwyy } {&&z-^ ?g_3 [Fk ; 5*&xz public void setSFilePath(String value) 7r6.n61F
{ j`{?OYD sFilePath = value; Y`~Ut:fZ } HY56"LZ$(} zYH&i6nj sA+ }TNhq public String getSFileName() /:cd\A} { ju8>:y8 return sFileName; 1KU!
tL } Cwv9 a^ hZ|z|!g0 yl'u'-Zb6 public void setSFileName(String value) Ki;*u_4{ { g_;\iqxL sFileName = value; /J]5H } jk;j2YNPw 1.}d.t
A @i public int getNSplitter() tm|ZBM { z<MsKD0Q return nSplitter; tR#OjkvX } '+@=ILj> &T#;-`' $zUP?Gq! public void setNSplitter(int nCount) KqHyG { em y[k nSplitter = nCount; bTI|F]^! } ?e%ZOI } lt/1f{v[: p'Y^X [F+}V, /* 'lH|eU&- **Utility.java Ugr!"Q#M */ %aP!hy package NetFox; 0-B5`=yU 9=s<Ld ko!)s public class Utility { 1a/++4O.| "fb[23g%@k Q-(zwAaE public Utility() ~]sc^[ { irZ])a 49eD1h3'X[ |44Ploz2b } M$wC=b R7%#U`Q^A //线程睡眠 +V2F#fI/ public static void sleep(int nSecond) \P[Y`LYL { C2!|OQ9A2 try{ B.=FSow Thread.sleep(nSecond); .7J#_*NV } G0Iw-vf catch(Exception e) M*0]ai|; { &s(^@OayE e.printStackTrace (); P1!qbFDv8 } )705V|v } Zj(AJ* r VG5i{1
0 //日志 _YRFet[,m public static void log(String sMsg) 9i:L&dN { ;[ZEDF5H System.err.println(sMsg); Y_liA }
_O?`@g?i e1yt9@k, `>o{P/HN public static void log(int sMsg) hDDn,uzpd { J4hL_iCQ System.err.println(sMsg); I{|O "8 } U4'#T%* } 6bg
;q(*7 y
RqL9t sJKI! /* =nHUs1rKn **TestMethod.java Lj({[H7D! */ PI {bmZ package NetFox; RU|Q]Ymx H_7/%noS5 $ Gf(38[w public class TestMethod { 1C+13LE$U }J}-//[A %UrueMEO public TestMethod() g _9C* { ///xx/weblogic60b2_win.exe v&\Q8!r_
try{ w7L{_aom SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); \
#F //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); +Ze}B*0 SiteFileFetch fileFetch = new SiteFileFetch(bean); )D
O?VRI fileFetch.start(); iI T;K@& } G[ PtkPSJ catch(Exception e){e.printStackTrace ();} @?sRj&w E: 68?IJ @mCEHI{P } C[cbbp .^`{1% aqZi:icFa public static void main(String[] args) 7sCG^&Y { h,:m~0gmj new TestMethod(); ]h`&&B qt } .vf'YNQ% } mY|)KJ 点击下载更多相关资料
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