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/* k9'%8(7M: **SiteFileFetch.java nlw(U3@7 */ #&5m=q$EI package NetFox; _~| j~QE] import java.io.*; vw>O;u.]B import java.net.*; 4Z1-RS j+w*Absh D8C@x` public class SiteFileFetch extends Thread {
lrU}_` j*rra UYD(++ SiteInfoBean siteInfoBean = null; //文件信息Bean %'%r. long[] nStartPos; //开始位置 h 5t,5e} long[] nEndPos; //结束位置 <Y9((QSM4 FileSplitterFetch[] fileSplitterFetch; //子线程对象 )pW(Cp long nFileLength; //文件长度 03iO4yOu boolean bFirst = true; //是否第一次取文件 ^SVdaQ{7 boolean bStop = false; //停止标志 W2qW`Ujo{ File tmpFile; //文件下载的临时信息 -U'6fx) + DataOutputStream output; //输出到文件的输出流 xaAJ>0IM k2_ " //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) #ZeZs 31 public SiteFileFetch(SiteInfoBean bean) throws IOException DNq=|?qn] { 6rF[eb siteInfoBean = bean; Q!zg=_z- //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); |wQ|h$| tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 7Ha
+@ if(tmpFile.exists ()) `BdZqXKG { mc~d4<$`! bFirst = false; 218ZUg -a read_nPos(); vZq7U]RW } &d[&8V5S else u&9|9+"N { i/NY86A nStartPos = new long[bean.getNSplitter()]; cRDjpc] nEndPos = new long[bean.getNSplitter()]; 5E+l5M*( } c<r`E ''s]6Jjw oJvF)d@gU (iIJ[{[H4) } d_-{-@ *ukE"Aj RYZh"1S;k public void run() ac p-4g+j { &JVe-. //获得文件长度 [mYmrLs6 //分割文件 s,\!@[N //实例FileSplitterFetch K)`,|q* \ //启动FileSplitterFetch线程 ;sT7c1X^! //等待子线程返回 A?06fo, try{ l[fU0;A if(bFirst) 1;i[H[hNY { .-k\Q}D nFileLength = getFileSize(); o;7!$v>uK if(nFileLength == -1) J'sVT{@GS { ^!3Sz1 System.err.println("File Length is not known!"); k$9oUE, } !rlN|HB else if(nFileLength == -2) vClD)Ar { /~'ZtxA System.err.println("File is not access!"); (@vu/yN } n"Ot'1yr else I@08F { ]6v6&YV for(int i=0;i<nStartPos.length;i++) r77?s? { qhRs5QXL nStartPos = (long)(i*(nFileLength/nStartPos.length)); T_lexX[\ } (x2I*<7P for(int i=0;i<nEndPos.length-1;i++) 5 S$*YRp { /lC n^E6- nEndPos = nStartPos[i+1]; ?{mFQ } Q7gBxp nEndPos[nEndPos.length-1] = nFileLength; fT!n*;h } FZ
DC? } m
jC6(?V LNmsv U Nc()$Nl8 //启动子线程 3ybEQp9 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; lY
yt8H for(int i=0;i<nStartPos.length;i++) CTv-$7# { [R iCa fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), B8NOPbT siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), #G:~6^A nStartPos,nEndPos,i); 2VyLt=mdh Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); f*04=R?w7> fileSplitterFetch.start(); UxzZr%>s } oIdMDp^$ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 1tHTjEG4^3 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 8QV+DDZx // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", -8X*(7 nEndPos = " + nFileLength); ;]3Tuq // fileSplitterFetch[nPos.length-1].start(); ,YX[6eZr N9 3
ZI|T kep.+t[ //等待子线程结束 ~v$gk //int count = 0; Z#IRNFj //是否结束while循环 8
C @iD% boolean breakWhile = false; x3xBl_t s
de|t O:"gJ4D while(!bStop) ymT&[+V { &ok2Xw write_nPos(); LGGC=;{} Utility.sleep(500); :PuJF`k breakWhile = true; tRZCOEo4 /PN[g~3 UbE*x2N for(int i=0;i<nStartPos.length;i++) <ppM\$ { BY.'0,H=k if(!fileSplitterFetch.bDownOver)
#lRkp.e { )=V0 breakWhile = false; $rD&rsx6 break; 7 [N1Vr(1 } Zmw'.hL } +FRXTku( if(breakWhile) pPem;i^~ break; WBLfxr D|}
y{~ SE&J)Sj] //count++; S-Mn //if(count>4) kaQn'5 // siteStop(); m!L&_Z|j } 8*V^DM3n- Jf{6'Ub }A;J-7g6 System.err.println("文件下载结束!"); B@D3aOvO } Xs$k6C3 catch(Exception e){e.printStackTrace ();} \2~Cn c*O } P#-Ye<V~J( d#cw`h<c~ a^t#kdT //获得文件长度 2uu"0Rm% public long getFileSize() %:yJ/&-Q,Z { NitWIj[U; int nFileLength = -1; :KGUO{_u try{ }DjW URL url = new URL(siteInfoBean.getSSiteURL()); yyb8ll?@a HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); NCbn<ojb httpConnection.setRequestProperty("User-Agent","NetFox"); xhLVLXZ9 nm2bBX,fh ?a+>%uWt int responseCode=httpConnection.getResponseCode(); UM%]A'h2O" if(responseCode>=400) $e1==@
R { a[bu{Z]% processErrorCode(responseCode); 42kr&UY& return -2; //-2 represent access is error |{udd~oE& } gZF-zhnC GawQ~rD tP8>0\$) String sHeader; t$m~O?I 0+p
<Jc! `Nmw for(int i=1;;i++) 9;KQ3.Fa}q { wGD*25M7$ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Li)rs<IX;m //Utility.log(in.readLine()); XgE\q sHeader=httpConnection.getHeaderFieldKey(i); *o <S{ if(sHeader!=null) bim}{wMb { 97;`R[^J if(sHeader.equals("Content-Length")) ~{lSc/SP| { D#R5G
nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); KvW{M break; X<{kf-GP } -,+zA.{+W } |Am
+f. else 3.>M=K~09 break; #InuN8sI } 2>3#/I9Y } +j
Z,vKr catch(IOException e){e.printStackTrace ();} |#G.2hMFr catch(Exception e){e.printStackTrace ();} ]/&qv6D*d 5'>DvCp%M ,Axk\7- Utility.log(nFileLength); DtLga[M OOJg%y*H BnJpC<xm return nFileLength; r/o1a't; } 1P i_V "@uKe8r|y yh~*Kt]9Ya //保存下载信息(文件指针位置) 3VNYDY`> private void write_nPos() G+&ug`0]5 { }EM vEA try{ Q{FK_Mv< output = new DataOutputStream(new FileOutputStream(tmpFile)); 03Czx ` output.writeInt(nStartPos.length); eU/o I} A for(int i=0;i<nStartPos.length;i++) ,`kag~bZ { eW%Cef // output.writeLong(nPos); J?9K|4
) output.writeLong(fileSplitterFetch.nStartPos); mAO$gHQ output.writeLong(fileSplitterFetch.nEndPos); g{0a]'ph } ,=!_7'm output.close(); 62BT 3/~ } 5qZebD2a catch(IOException e){e.printStackTrace ();} zpi
Q ;P catch(Exception e){e.printStackTrace ();} n$]78\C } fL-lx-~ S~L;oX?(! v__n>*x //读取保存的下载信息(文件指针位置) iF0x>pvJ@ private void read_nPos() X+6`]] { `b.KMOn try{ ZbBz@1O DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); cP8g.+ int nCount = input.readInt(); SLI(;, s nStartPos = new long[nCount]; /Mq9~oC nEndPos = new long[nCount]; }.`no for(int i=0;i<nStartPos.length;i++) $#2zxpr, { o_=t9\: nStartPos = input.readLong(); ^!a4!DGVT nEndPos = input.readLong(); 2;&K*>g&. } B<^yT@Wc input.close(); Gs`[\<;LI } ",&^ f catch(IOException e){e.printStackTrace ();} d'p]F~a catch(Exception e){e.printStackTrace ();} Z9S5rPHEL } e'"2yA8dh" v/ $~ifY" ,_+Gb private void processErrorCode(int nErrorCode) wg-qq4Q\ { OGA_3|[S System.err.println("Error Code : " + nErrorCode); .AHf]X0 } al#BfcZW =17d7#- R9+0ZoS //停止文件下载 K+WbxovXU public void siteStop() lk/T|0]) { vMD%.tk bStop = true; (*6kYkUK for(int i=0;i<nStartPos.length;i++)
DT2uUf fileSplitterFetch.splitterStop(); (3. B\8s }.ZT?p\ 8/i];/,v*M } &oJ1v<` } 5f#N$mh //负责部分文件的抓取 ]{.iv_I **FileSplitterFetch.java z8VcV*6 */ '.{tE* package NetFox; zeqwmV= v,}Mn7: $%:=;1Jl import java.io.*; \t=ls import java.net.*; [:Upn)9
,>C`| ;*J_V/&? public class FileSplitterFetch extends Thread { o54/r#~fi Yee%
<<S )c6t`SBwi String sURL; //File URL 4DwQ7KX long nStartPos; //File Snippet Start Position p+.xye U( long nEndPos; //File Snippet End Position I-glf?F) int nThreadID; //Thread's ID x^sSAI( boolean bDownOver = false; //Downing is over eE=}^6)(* boolean bStop = false; //Stop identical A r=P;6J FileAccessI fileAccessI = null; //File Access interface ZBY*C;[)*P vz~`M9^ ]cmq public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException " z8iuF { fo$s9g^< this.sURL = sURL; `<#Ufi*c this.nStartPos = nStart; xU6rZCqE this.nEndPos = nEnd; " J4?Sb < nThreadID = id; d~QZcR fileAccessI = new FileAccessI(sName,nStartPos);//定位 z JBcz, } +<})`(8 6?`3zdOeO c*!xdK public void run() )i^+=TZ q { Jc=~BT_G while(nStartPos < nEndPos && !bStop) vB?(| { v?@=WG Zws[C
8MZ:= try{ lWyg_YO@ URL url = new URL(sURL); 0F5QAR
O HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,5XDH6L1 httpConnection.setRequestProperty("User-Agent","NetFox"); -J&
b~t@ String sProperty = "bytes="+nStartPos+"-"; W Te1E, M httpConnection.setRequestProperty("RANGE",sProperty); lj US-6 Utility.log(sProperty); )x<oRHx] )k~{p;Ke n/ CP2A InputStream input = httpConnection.getInputStream(); SHA6;y+U/~ //logResponseHead(httpConnection); 6uu49x_^L4 p=T6Ix'_2e BD_"w]bqD byte[] b = new byte[1024]; IW>\\&pJ int nRead; 8ioxb`U while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Hw\hTTK { IM(=j nStartPos += fileAccessI.write(b,0,nRead); D:56>%y@ //if(nThreadID == 1) _(_U= // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Q2LAXTF]y } .
g8WMm {P7 I<^, _8{6&AmIw Utility.log("Thread " + nThreadID + " is over!"); C"cBlru8B bDownOver = true; .4%6_`E //nPos = fileAccessI.write (b,0,nRead); 3E$h
W } y,F|L?dIq catch(Exception e){e.printStackTrace ();} /ReOf<%B } (GJX[$@ } ] <y3;T\~ pKzrdw-! [ApAd //打印回应的头信息 @wTRoMHPQ public void logResponseHead(HttpURLConnection con) 5uAUi=XA>S { ^@-qnU lH for(int i=1;;i++) Y-
tK { aUyJi String header=con.getHeaderFieldKey(i); #W2#'J:l if(header!=null) =rzhaU'A' //responseHeaders.put(header,httpConnection.getHeaderField(header)); )uK Tf=; Utility.log(header+" : "+con.getHeaderField(header)); VD0U]~CWR else b|-7EI>l9 break; sOBuJx${m } q +*>T=k } KrqO7 #+SdX[N ( jtkY_ public void splitterStop() @ sG5Do { ,/Yo1@U bStop = true; )%Lgo${[; } HI!bq%TZ4 dx)v`.%V e)Pm{:E } fK1^fzV J?[}h&otQ wrEYbb /* EWp'zbWP **FileAccess.java W't.e0L<6 *//文件访问(定位,写) &aWY{ ?_ package NetFox; IfF&QBi import java.io.*; &Tn7 40Z/;,wp{ V?C_PMa public class FileAccessI implements Serializable{ W}.p, d F9 4Qb} //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 :qxd
s>Xm RandomAccessFile oSavedFile; 3=Va0}#& long nPos; 7p+uHm 5imqZw 1+NmiGKg public FileAccessI() throws IOException aj6{ { od`:w[2\ this("",0); :}[[G2|9 }
j.vBld w*qmC<D$A I3D#wXW public FileAccessI(String sName,long nPos) throws IOException S$%Y{ { ba"a!#wA oSavedFile = new RandomAccessFile(sName,"rw"); nyr)d%I{ this.nPos = nPos; 1`I#4f oSavedFile.seek(nPos); Oo`b#!L } ealh>Y [0-zJy|, Jm{~H% public synchronized int write(byte[] b,int nStart,int nLen) R:FyCT_, { hP]zC1s int n = -1; %{K6 try{ u9^R
?y oSavedFile.write(b,nStart,nLen); _.ELN/$- n = nLen; }hX"A!0 } G8ksm2 } catch(IOException e) wA>bL PTw { a FrVP e.printStackTrace (); xrky5[XoD } m[!AOln) PdD|3B& ^"\.,Y return n; H=k`7YN } $[-{Mm C%+>uzVIw `Ao;xOJ } 8L}N,6gC4_ Zjh9jvsW ?FRQ!R /* fl18x;^I **SiteInfoBean.java NurbioFL */ j[o5fr)L package NetFox; q;a#?Du o DUK.-|a7 ALY%
h!L public class SiteInfoBean { vXi}B ds9`AiCW> G$HLta private String sSiteURL; //Site's URL k<3_!?3 private String sFilePath; //Saved File's Path 5`3f"(ay/ private String sFileName; //Saved File's Name .5m^)hi private int nSplitter; //Count of Splited Downloading File ^. i;, MB,P#7| f3]u-e'b public SiteInfoBean() H9Pe,eHs {//nSplitter的缺省值为5 1yIo'i1 //default value of nSplitter is 5 .DkDMg1US this("","","",5); L5*,l`lET } 8E!I9z TAt9+\' ,`JXBI~ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) oFeflcSz { "@[xo7T sSiteURL= sURL; ;ckv$S[p sFilePath = sPath; d#eHX|+ sFileName = sName; m'%Z53& this.nSplitter = nSpiltter; ^(0tNX/XD OWK)4[HY( \T_?<t,UT } ?JD\pYg[/ |k4ZTr]? )>LC*_v public String getSSiteURL() r4c3t,L*$I { Gr;~P* return sSiteURL; (A*r&Ak[ } "Rp ]2'? $u4esg 'c<@SVF{Zz public void setSSiteURL(String value) #:68}f"$ { Hvq< _&2 sSiteURL = value; 7=ZB;(`L1 } xUD$i?3z F*d{< u[jdYWQa public String getSFilePath() s geP`O% { <>JDA(F" return sFilePath; >gr6H1 } 'Sc3~lm(dH GSW{h[Op '}5}wCLA public void setSFilePath(String value) ~^"cq
S( { HC8{); sFilePath = value; V_(?mC } Iq\sf-1E #V8='qD
%;zWS/JhL public String getSFileName() 7q|(ZZa { Z<r&- !z return sFileName; |"P5%k#6^> } P
N_QK Z Y#6@0Nn[G ^ D
B0C public void setSFileName(String value) T"Q4vk,3*J { l{Hi5x'H sFileName = value; {F
k]X#j } F,O+axO
ja )}c$n
+X;6%O; public int getNSplitter() DI}h?Uf , { L#u6_`XJ+ return nSplitter; RkLH}`# } XR\ iQ hBE}?J> IHo6& public void setNSplitter(int nCount) %1HW
) 7 { xm YA/wt8 nSplitter = nCount; eS@RA2
} mc(&'U8R0I } YQN=.Wtc \lR~!6: =WEfo; /* ;gm){ g **Utility.java &,&+/Sr11 */ @R2|=ox package NetFox; \hM6 ykY- H[,.nH_>+ >M:5yk@ public class Utility { 4g1u9Sc0 K)Db3JIIk fJE ki>1 public Utility() ooZ7HTP| { $zmES tcm 2z[Pw0#V FcW ?([l } Vn/6D[}Tu &7DE$ S //线程睡眠 Ya9uu@F public static void sleep(int nSecond) q]Qgg { i]$d3J3 try{ V7[qf " Thread.sleep(nSecond); ]K9x<@! } j9u-C/Q\r catch(Exception e) ;v0sM*x%V { LOida# R e.printStackTrace (); "W+4`A(/l } \R-u+ci$ZY } N M8F 2CxdNj //日志 ?|hzAF"U public static void log(String sMsg) e#'`I^8l { KFV]2mFN System.err.println(sMsg); -~(0:@o ; } u8<=FV3 x:2[E- iqoPD4A public static void log(int sMsg) tIr66'8 { d ,QJf\fc" System.err.println(sMsg); ,OasT!Sr } huTJ
a2 } f8&=D4)-w ixS78KIr D!mhR?t /* {9l4 pT3 **TestMethod.java `\Npu */ |M
K-~ep package NetFox; )@Zel.XD "7<4NV@yQ X&lkA
( public class TestMethod { ,!Hl@( #SqOJX~Q tRv#%>fj public TestMethod() XW#4C*5?d { ///xx/weblogic60b2_win.exe Lw#hnLI. try{ J`mp8?;% SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); .Nf*Yqs0 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); +'Ge?(E4_ SiteFileFetch fileFetch = new SiteFileFetch(bean); <K0lS;@K fileFetch.start(); Sc0ZT/Lm } [MEa@D<7N catch(Exception e){e.printStackTrace ();} vv8$u3H $o @?D^ uVO9r-O8p
} JV/,QWar { &qBr&kg bR6bS7$ public static void main(String[] args) f/c}XCH_h { |(V%(_s new TestMethod(); eP2 y U } {Y@[hoHtF } >'T%=50YH 点击下载更多相关资料
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