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/* y1jCg%'H **SiteFileFetch.java H*?t^ */ <VMGTBVQ package NetFox; TNT4<5Ol6 import java.io.*; F/,NDZN import java.net.*; t4."/.=+ 9R!atPz9 1fp? public class SiteFileFetch extends Thread { F$y$'Rzu_B )J o:pkM W 8<&gh+ SiteInfoBean siteInfoBean = null; //文件信息Bean Co9^OF-k long[] nStartPos; //开始位置 ;>%r9pz ~ long[] nEndPos; //结束位置 (R,#a *CV FileSplitterFetch[] fileSplitterFetch; //子线程对象 9!ngy*\x long nFileLength; //文件长度 RN1y^` boolean bFirst = true; //是否第一次取文件 ].avItg boolean bStop = false; //停止标志 r8t}TU>C File tmpFile; //文件下载的临时信息 j7Yu>cr DataOutputStream output; //输出到文件的输出流 @Myo'{3vF YH}'s>xZz //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) '&P%C" 5 public SiteFileFetch(SiteInfoBean bean) throws IOException >>4qJ%bL { %"i(K@ siteInfoBean = bean; d(ZO6Nr Q //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ^`i#$ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ^x ]r`b if(tmpFile.exists ()) :I] Mps< { B9 _X;c bFirst = false; !NK1MU?T) read_nPos(); ~Py`P'+ } ;DQ ZT else \{_q.;} { RT4x\&q nStartPos = new long[bean.getNSplitter()]; q_: 4w$> nEndPos = new long[bean.getNSplitter()]; w?PkO p } Qab>|eSm +uF>2b6' -u+vJ6EY Xz6<lLb } df8k7D;~e l ~"^7H?4e 3GYw+%Z] public void run() @(w@e\Bq { {f_={k //获得文件长度 7DogM".}~Q //分割文件 5+4IN5o]= //实例FileSplitterFetch >a<.mU|# //启动FileSplitterFetch线程 Pjf"CW+A //等待子线程返回 VcE:G#]5 try{ JJ-( Sl if(bFirst) Uk wP { d UE,U= nFileLength = getFileSize(); .<0ye_S'y if(nFileLength == -1) 98c(< { )th<,Lo3# System.err.println("File Length is not known!"); 0@0w+&*"@ } dmtr*pM_ else if(nFileLength == -2) wQl
, { tPWLg), System.err.println("File is not access!"); &GO}|W } /|m2WxK) else <Xhm`rH { ];$L &5^ for(int i=0;i<nStartPos.length;i++) s*KhF'fN { XAKs0*J> nStartPos = (long)(i*(nFileLength/nStartPos.length)); h]&GLb&<? } hg]]Ok~cAs for(int i=0;i<nEndPos.length-1;i++) 3PWL@>zi { W&W5lArr nEndPos = nStartPos[i+1]; #<"~~2? } JPI3[.o nEndPos[nEndPos.length-1] = nFileLength; |)DGkOtd } mkk6`,ov } sRR(`0Zp G^|:N[>B .[KrlfI //启动子线程 F@jZ ho fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; VR 8-&N for(int i=0;i<nStartPos.length;i++) WF+99?75 { V]6dscQ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;6
D@A siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ea2ayT nStartPos,nEndPos,i); 9Q^r
O26+ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); wo{gG?B fileSplitterFetch.start(); )gUR@V>e2 } \fLMr\LL& // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), \ A#41
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Igt#V;kK"2 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", LKB$,pR~1l nEndPos = " + nFileLength); \;,+ // fileSplitterFetch[nPos.length-1].start(); cGzPI+F OX0%C.K)hZ i v38p%Zm //等待子线程结束 :uS\3toj //int count = 0; =U9*'EFr //是否结束while循环 &vMb_;~B boolean breakWhile = false; DH!~ BB; [#vH'y (_]~wi-, while(!bStop) h
0Q5-EA { `:KY\ write_nPos(); !sP{gi#= Utility.sleep(500); <oV(7 breakWhile = true; CNyIQ}NJ WIxy}3_to %JBz5G for(int i=0;i<nStartPos.length;i++) -zgI_u9=EB { hBUn \~z if(!fileSplitterFetch.bDownOver) nPl?K:( { Z]Cq3~l breakWhile = false; n0 {i&[I~+ break; 9wwqcx)3( } OX!tsARC@ } ~rKrpb]ow if(breakWhile) I; |B.j break; s Y Qk _S1>j7RQo lT?v^\(H //count++; x~~|.C, //if(count>4) wKxtre(v // siteStop(); dn+KH+v } }<SQ E6ElNgL K=k"a System.err.println("文件下载结束!"); n
M*%o- } }2.`N%[ catch(Exception e){e.printStackTrace ();} WX?IYQ+ } J=I:CD% Y"aJur=` )9`qG:b' //获得文件长度 l<LI7Z]A public long getFileSize() 6SkaH<-&K { d.d/< int nFileLength = -1; vJ[^K try{ 6ojo :-%Vf URL url = new URL(siteInfoBean.getSSiteURL()); }rw8PZ9 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); WlC:l httpConnection.setRequestProperty("User-Agent","NetFox"); f+,qNvBY/ [!#L6&:a8 w-MCZwCr) int responseCode=httpConnection.getResponseCode(); q"8ea/ if(responseCode>=400) Fj3a.' { /]Md~=yNp processErrorCode(responseCode); h2]P]@nW;W return -2; //-2 represent access is error xj;H&swo } ~IBP|)WA- qiBVGH :>f )g String sHeader; @,7GaK\ Ai?*s%8v ,Uqs1#r for(int i=1;;i++) K;H&n1 { f+)L#>Gl? //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); C1n>M}b //Utility.log(in.readLine()); qWPkT$ u sHeader=httpConnection.getHeaderFieldKey(i); rcG"o\g@+ if(sHeader!=null) ,m|h<faZL { u^I|T.w<r6 if(sHeader.equals("Content-Length")) j-}O0~Jz { }!.(n=idZ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); YZ8>OwQz2 break; 0-Ku7<a } V5>B])yQ } )'cMYC else yjJ5>cg break; @:vwb\azVD } `kXs;T6& } ]Q3ADh catch(IOException e){e.printStackTrace ();} \?k'4rH catch(Exception e){e.printStackTrace ();} 0znR0%~ -zeG1gr3 Jk
n>S#SZ Utility.log(nFileLength); wE`]7mA 16( QR- AH7}/Rc return nFileLength; wc4{)qDE } Fq<A V&2l5v 2eY_%Y0 //保存下载信息(文件指针位置) bwMm#f
private void write_nPos() o|<!"AD7 { 8wFJ4v3 try{ B%6)}Nl[ output = new DataOutputStream(new FileOutputStream(tmpFile)); Z=o2H Bm7 output.writeInt(nStartPos.length); 3bH'H*2 for(int i=0;i<nStartPos.length;i++) }9OC,Y8?D { j6 z^Tt12 // output.writeLong(nPos); &@OT*pNna output.writeLong(fileSplitterFetch.nStartPos); x
g output.writeLong(fileSplitterFetch.nEndPos); vXZOy%$o } ;dgp+ output.close(); f46t9dxp$ } PKiy5D*8p catch(IOException e){e.printStackTrace ();} =-n}[Y}A catch(Exception e){e.printStackTrace ();} nmKp[-5 } [hv~o~q eru.m+\ r[iflBP //读取保存的下载信息(文件指针位置) ;[OH(! private void read_nPos() &}B|"s[ { [ sjosV try{ 4!no~ $b DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Q/0Tj]D int nCount = input.readInt(); 7;wd(8 nStartPos = new long[nCount]; `|&O*` nEndPos = new long[nCount]; @lr ztM for(int i=0;i<nStartPos.length;i++) -x`@6 { Pu$Tk| nStartPos = input.readLong(); ;iL#7NG-R nEndPos = input.readLong(); X\qNG] } Fywv input.close(); Hf2_0wA3 } RMu~l@ catch(IOException e){e.printStackTrace ();} <R=Zs[9M1 catch(Exception e){e.printStackTrace ();} lzVq1@B } /t$d\b17pX {B*s{{[/' R$[vm6T? private void processErrorCode(int nErrorCode) >!1-lfa8 { vV-`jsq20H System.err.println("Error Code : " + nErrorCode); w%jII{@, } A#iV=76_ Z,Dl` w M!D3 }JRm //停止文件下载 `7V]y- public void siteStop() 56kI
5: { [5Mr@f4I bStop = true; ~U&AI1t+J for(int i=0;i<nStartPos.length;i++) [?N~s:} fileSplitterFetch.splitterStop(); Cjlk 12 gU{VD 0)Wltw~`& } BuXqd[;K% } M@v.c;Lt //负责部分文件的抓取 Ne1$ee.NE **FileSplitterFetch.java Si;H0uP O */ MeZf*'
J package NetFox; F0Yd@Lk$_ dJNe+
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n<R?ffy import java.io.*; "'?>fe\qG import java.net.*; ^9:Z7 >Z 59;KQ pB0 \\wR public class FileSplitterFetch extends Thread { ^WWQI+pk &7tbI5na@ vy:Z /1q String sURL; //File URL >7DhTM-A long nStartPos; //File Snippet Start Position 5vnrA'BhBU long nEndPos; //File Snippet End Position 4zFW-yy int nThreadID; //Thread's ID @?]RBX?a boolean bDownOver = false; //Downing is over 5#E`=C% boolean bStop = false; //Stop identical &`2)V;t FileAccessI fileAccessI = null; //File Access interface 8$Y9ORs4 $X,D( (V2fRv public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException f
x+/C8GK { iSs:oH3l this.sURL = sURL; ri-b=|h2j this.nStartPos = nStart; 1\I}2; this.nEndPos = nEnd; q9s=~d7 nThreadID = id; Jij*x>K>y fileAccessI = new FileAccessI(sName,nStartPos);//定位 ;vjOUn[E } V1B5w_^>h' p9{mS7R9T >(t6.= public void run() tf`^v6m%] { ds[| while(nStartPos < nEndPos && !bStop) qF;|bF { 9V*qQS5<p ,.FxIl] %6f*{G
w try{ /aZ`[m2 URL url = new URL(sURL); $*=<Yw4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); bY~pc\V:`w httpConnection.setRequestProperty("User-Agent","NetFox"); PALc;"]O String sProperty = "bytes="+nStartPos+"-"; oe-\ozJ0 httpConnection.setRequestProperty("RANGE",sProperty); aO4?m+ Utility.log(sProperty); {;6`_-As% &6nWzF ~oY^;/ j InputStream input = httpConnection.getInputStream(); kc&U'&RgY //logResponseHead(httpConnection); \(2sW^fY sD#.Oq4&]y oW6XF-yM byte[] b = new byte[1024]; 40m -ch6Q int nRead; P71Lqy)5}A while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) -PR N:'T { WNrk}LFof nStartPos += fileAccessI.write(b,0,nRead); C!bUI8x
z //if(nThreadID == 1) E+;7>ja // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); </*6wpN } h2fNuu" 7WZ+T"O{I ePo}y])2 Utility.log("Thread " + nThreadID + " is over!"); {9q4)R}G bDownOver = true; k~nBiV //nPos = fileAccessI.write (b,0,nRead); Oxd]y1 } ]~3V}z,T* catch(Exception e){e.printStackTrace ();} j|#Bo:2km } 9p(.A$ } %._.~V H"WprHe hkQ"OsU //打印回应的头信息 XlR@pr6tw public void logResponseHead(HttpURLConnection con) o!A+&{ { E hMNap}5" for(int i=1;;i++) z-)O9PV { Lw>N rY(Y String header=con.getHeaderFieldKey(i); BnasI;yWb if(header!=null) wz%NbLy- //responseHeaders.put(header,httpConnection.getHeaderField(header)); ?.BC#S)q1 Utility.log(header+" : "+con.getHeaderField(header)); xU`p|(SS- else H9e<v4c break; \bw2u! } <7jW_R@ } 8bld3p"^ ~b8]H|<'Y ?$4 PVI} public void splitterStop() 9 djk[ttA) { -(H0>Ap bStop = true; %1+4_g9 } (SAs- Rnq7LGy )+9Uoe~6 } $~T4hv : <wD-qT W
[/8%3 /* S 30%)<W **FileAccess.java 0<@@?G *//文件访问(定位,写) (n_/`dP package NetFox; 'TB2:W3 import java.io.*; _X
x/(.O &Au@S$ij }k.Z~1y public class FileAccessI implements Serializable{ ncT&Gr '6%2.[o //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 `e}B2;$A3 RandomAccessFile oSavedFile; K]w'&Qm8W long nPos; "3Y0`&:D ey$&;1x#5 ab?aQ*$+ public FileAccessI() throws IOException LZxNAua { 4BpZJ~(p this("",0); 7HYwLG:\~ } @f3E`8 +v:SM9 AH~E )S public FileAccessI(String sName,long nPos) throws IOException R.<g3"Lm> { {E|$8)58i oSavedFile = new RandomAccessFile(sName,"rw"); e$Pj.>-<= this.nPos = nPos; mQ"-,mMI oSavedFile.seek(nPos); pOoEI+t } DZtsy!xA [ub e6 a0H+.W+] public synchronized int write(byte[] b,int nStart,int nLen) 67FWa { 7WzxA=*# int n = -1; )zDCu` try{ 4;2uW#dG" oSavedFile.write(b,nStart,nLen); FGBbO\</ n = nLen; Yrq~5)% } >Cq<@$I2EB catch(IOException e) mj7#&r,1l { 5*u+q2\F e.printStackTrace (); =>~:<X., } E|shs=I gL/9/b4 `C'H.g\>2Q return n; j8:\%| } J\=*#*rJ1 +]{G@pn &s>Jb?_5Mx } S)"Jf? )MT}+ai {(Es(Sb}c /* k)TpnH! " **SiteInfoBean.java XfIJ4ZM5 */ LCV(,lu package NetFox; B/Ws_Kv deh*Ib:(S )J(6xy public class SiteInfoBean { S~G]~gt q{x8_E!L jT;;/Fd3/ private String sSiteURL; //Site's URL n|yO9:Uw< private String sFilePath; //Saved File's Path QIFgQ0{ private String sFileName; //Saved File's Name .O<obq~;C private int nSplitter; //Count of Splited Downloading File -jmY)(\ ZXPX,~ 5o p!AAFmc public SiteInfoBean() !C.4<?*| {//nSplitter的缺省值为5 sU^1wB
Rj //default value of nSplitter is 5 Pr
C{'XDlU this("","","",5); a(ZcmYzXU } {Qj~M<@3 =:U`k0rn! +:/%3}` public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) :7;@ZEe { as=fCuJ sSiteURL= sURL; %^6F_F_jS sFilePath = sPath; + Vdpy( sFileName = sName; _7y[B&g[r this.nSplitter = nSpiltter; S$-7SEkO+ KwVbbC3 t"I77aZ$A } 8zq=N#x *|HY>U. eS){1 public String getSSiteURL() lH~[f { *lJxH8 \ return sSiteURL; J]r^W)O } m.0*NW u: |k00Z+O( public void setSSiteURL(String value) z\4.Gm- { ;q>ah!"k sSiteURL = value; o^wqFX(Y } <wHP2|<l* }Ou}+^Bc + LJ73
! public String getSFilePath() u)Whr@m { "d}Gp9+$VY return sFilePath; GTxk%
} MiX 43Pk] 4Wp=y ;mi%F3 public void setSFilePath(String value) *qpSXmOz { M )(DZ} sFilePath = value; oxtay7fx } F((4U"
_)iCa3z /BL4<T f public String getSFileName() 3PF_H$`oJ { (**oRwr% return sFileName; (^>J&[= } B`sAk
% ?gXp*>Kg[ a,o*=r public void setSFileName(String value) pTuS*MYz { QTnP'5y sFileName = value; ksm~<;td } ,`sv1xwd I(
Mm?9F yWf`rF{ public int getNSplitter() zKK9r~ M { HK%7g return nSplitter; l%=; } MpOc V]?R>qhgu l}P=/#</T public void setNSplitter(int nCount) |1Z)E+q*: { 9jGu}Vo nSplitter = nCount; /zox$p$?h } EiaW1Cs } wdoR%b{M qxJ\ye+'* dD@(z:5M\ /* J9 I:Q<; **Utility.java (w zQ2Dk */ ?r!o~|9| package NetFox; [<TrS/,)> "EJ~QCW*Yh -ze J#B)C public class Utility { R^e'}+Z K.yb
^dg5 &,)&%Sg[ public Utility() IvNT6]6 P { iJ|uvPCE 3r1*m
+ ,tRj4mx } fd9k?,zM $NO&YLS@ //线程睡眠 [KQ6Ta. public static void sleep(int nSecond) rW#T
vUn { Zgb!E]V[ try{ N)Z?Z+}h Thread.sleep(nSecond); L4l!96]a } #|``ca54B catch(Exception e) bQ5\ ]5M { Ht&YC<X e.printStackTrace (); -%4,@
x` } @[v~y"tE} } -DAlRz#d, 9Gz=lc[!7 //日志 =?`c=z3~i$ public static void log(String sMsg) 9MqGIOQ${j { 8a"%0d# System.err.println(sMsg); xe$_aBU } a-J.B.A$Z/ Yz93'HDB -D~%|).' public static void log(int sMsg) |vzl. ^"- { K~EmD9 System.err.println(sMsg); lk80#( :Z } e@YK@?^#N } r,2g^K)6 rQ snhv '}#9)}x! /* Ef{Vp;] **TestMethod.java UR5`ue ; */ ;xn0;V'= package NetFox; J4U1t2@)9 2I{"XB Oa>Ppldeg public class TestMethod { mB)bcuPv 1m0c|ckb Z<{QaY$" public TestMethod() dUdT7ixo { ///xx/weblogic60b2_win.exe 5Jnlz@P9 try{ E&:,oG2M SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); I1&aM}y{G //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); MnW+25=N SiteFileFetch fileFetch = new SiteFileFetch(bean); k$}fWR fileFetch.start(); #A8sLkY } *}W_+qo" catch(Exception e){e.printStackTrace ();} 8*a&Jl ""~ajy Yu2Bkq+ } Ny)X+2Ae C+&l<
fM& DLNbo2C public static void main(String[] args) jb!i$/%w { ZqO^f*F>h new TestMethod(); 18:%~>.! } 0+b1vhQ } FHI ;)wn= 点击下载更多相关资料
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