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/* nd\$Y **SiteFileFetch.java O\q6T7bfRW */ Y, Lpv| package NetFox; k_1;YOBF import java.io.*; 7&etnQJ{ import java.net.*; pbh>RS=ri 2 .Xx)(> "WY5Pzsi: public class SiteFileFetch extends Thread { >8>s
K(S] L ,W'P8C SiteInfoBean siteInfoBean = null; //文件信息Bean -m,Y6 long[] nStartPos; //开始位置 [fwk[qFa long[] nEndPos; //结束位置 >t9DI FileSplitterFetch[] fileSplitterFetch; //子线程对象 9h+TO_T@F long nFileLength; //文件长度 bWp)'mx5u boolean bFirst = true; //是否第一次取文件 C5KUIOg boolean bStop = false; //停止标志 #3>jgluM' File tmpFile; //文件下载的临时信息 y'6l fThT DataOutputStream output; //输出到文件的输出流 D1ik*mDA= Ei2M~/ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) )~xH!%4F public SiteFileFetch(SiteInfoBean bean) throws IOException f\hQ>MLzt { oG hMO siteInfoBean = bean; =^zGn+@z //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); $BLd>gTzmv tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 1#|lt\T if(tmpFile.exists ()) ]2&RN@
{ QXa2qxTc bFirst = false; $WRRCB/A6 read_nPos(); %"#ydOy } -:!Wds else 71IM`eL=ED { 6h)
&h1Yd nStartPos = new long[bean.getNSplitter()]; hVz]', nEndPos = new long[bean.getNSplitter()]; !u:;Ew } $E8}||d WK0IagYw Aj/EaIq z t } V<}chLd, I4<_y5 VV[Fb9W ; public void run() 6B
b+f" { S s+ //获得文件长度 FLG{1dS //分割文件 g&_f%hx? //实例FileSplitterFetch IQ$ 6}. //启动FileSplitterFetch线程 pFBK'NE //等待子线程返回 ^mut-@ N9 try{ XKOPW/ if(bFirst) $EdL^Q2KAy { }dU!PZ9N) nFileLength = getFileSize(); E2=vLI] if(nFileLength == -1) $&jVEMia { s I 0:<6W System.err.println("File Length is not known!"); #g2&x sU } lG[j,MDs else if(nFileLength == -2) gTLBR { Uu Zjf9} System.err.println("File is not access!"); 8RVRfy,w } On[yL$? else U{@2kg- { d<m.5ECC} for(int i=0;i<nStartPos.length;i++) * vqUOh { ]T.+(\I nStartPos = (long)(i*(nFileLength/nStartPos.length)); V8pZr+AJ } G2sj<F=AV for(int i=0;i<nEndPos.length-1;i++) <<Z, 1{3F {
%z~kHL nEndPos = nStartPos[i+1]; ?1LRR
;-x } 0xeY0!ux nEndPos[nEndPos.length-1] = nFileLength; e;|$nw- } #D ]CuSi } v5{2hCdt +A$>F@u .F$cR^i5u //启动子线程 .Ep&O# fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Y%}N@ ,lT for(int i=0;i<nStartPos.length;i++) I;G(Wj { `9T5Dem|# fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 'C>sYSL siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), bu08`P9 nStartPos,nEndPos,i); fILvEf4b Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qN
Ut fileSplitterFetch.start(); H_aG\
} W|s";EAM // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), pEW~zl siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ovi^bNQ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", RU>qj
*e nEndPos = " + nFileLength); >
+00[T // fileSplitterFetch[nPos.length-1].start(); 59+KOQul6 >Ml5QO$*.q 47f\ //等待子线程结束 (S?DKPnR //int count = 0; A<( DYd1H //是否结束while循环 B$hog_=s boolean breakWhile = false; Ji6.-[: ~_g{P3 R-wz+j# while(!bStop) ^r mQMjF
{ ~-R2mAUK write_nPos(); pmO0/ty Utility.sleep(500); "7jE&I breakWhile = true; l/\D0\x2 Q7tvpU a(ml#-M for(int i=0;i<nStartPos.length;i++) tE-g]y3 { N0JdU4' if(!fileSplitterFetch.bDownOver) Tf?`_jL { yO* breakWhile = false; |k,-]c;6 break; 1-&L-c. } XP?)xDr8 } KD H<T4#x if(breakWhile) brlbJFZ19 break; Xil;`8h .0~uM!3y ~-B+7 //count++; Nd{U|k3pL //if(count>4) 7q5*grm // siteStop(); YhqMTOw } U4yl{? M CP GDr e0otr_)3F System.err.println("文件下载结束!"); 1xkrhqq } D{[{ &1\)r catch(Exception e){e.printStackTrace ();} 4z9lk^#"X } X8N9*vy `u PLyS. VxARJ*4=Y //获得文件长度 FouN}X6 public long getFileSize() #.$y { \<09.q<8 int nFileLength = -1; B&0W P5OF try{ ^w2 HF URL url = new URL(siteInfoBean.getSSiteURL()); cO5zg<wF HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !\9^|Ef? httpConnection.setRequestProperty("User-Agent","NetFox"); 22U`1AD3U j0V/\Ep)T< QCE7VV1Rw int responseCode=httpConnection.getResponseCode(); Pnm$g;`P if(responseCode>=400) IF\ @uo` { i1-%#YYF( processErrorCode(responseCode); CH
29kQ return -2; //-2 represent access is error 2Q5 @2jT } 8&|
o 't0M+_J L/`1K_\l String sHeader; :zLf~W f5FEHyj| LdN[N^n[H for(int i=1;;i++) 1gbFl/i6T { MGt>:&s(] //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); $T^q>v2u //Utility.log(in.readLine()); Qz#By V: sHeader=httpConnection.getHeaderFieldKey(i); ZDgT"53 if(sHeader!=null) 'wG1un;t { dIlpo0; F if(sHeader.equals("Content-Length")) !]82$ { #S'uqP! nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); hr 6j+p: break; VN!nef
} orH6R8P] } J&,hC%] else QOSMV#Nw% break; J
3C^tV } )`f-qTe } $["HC-n?.k catch(IOException e){e.printStackTrace ();} W/>a 1 catch(Exception e){e.printStackTrace ();} kaB|+U9^ Hy&Z0W'l c&',#.9 Utility.log(nFileLength); pTwzVz~ &um++
\ t~/:St return nFileLength; cr{yy :D } #NYnZ^6e `hkvxt ,#3Aaw //保存下载信息(文件指针位置) |<,qnf| - private void write_nPos() 8xgBNQdPT { [1P_^.Htr try{ WF~BCP$OR output = new DataOutputStream(new FileOutputStream(tmpFile)); aO&{.DO2 output.writeInt(nStartPos.length); 1bCE~,tD for(int i=0;i<nStartPos.length;i++) _Fa\y ZX { y
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// output.writeLong(nPos); bXF8V output.writeLong(fileSplitterFetch.nStartPos); 9u{[e" output.writeLong(fileSplitterFetch.nEndPos); .eD&UQ } -EP1Rl`\ output.close(); K9%rr_ja! } 0j!3\=P$ catch(IOException e){e.printStackTrace ();} /g{*px| catch(Exception e){e.printStackTrace ();} ;7:} iKU } ;QXg*GNAv$ IeYNTk&< C`i#7zsH //读取保存的下载信息(文件指针位置) 8fP2qj0 private void read_nPos() @u9L+*F
{ ~iH a^i?2* try{ |> STb\ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); *mp:#' int nCount = input.readInt(); JT0j2_*Rr nStartPos = new long[nCount]; L.'61ZU nEndPos = new long[nCount]; q@bye4Ry%W for(int i=0;i<nStartPos.length;i++) (x2?{\? { TF:'6#p nStartPos = input.readLong(); ';FJs&=I nEndPos = input.readLong(); :KO&j"[ } <?7qI8 5OT input.close(); g,JfT^ } z)C/U catch(IOException e){e.printStackTrace ();} G]rY1f0 catch(Exception e){e.printStackTrace ();} Gb`)d } RQ8d1US j_so s%- 1}wDc$O private void processErrorCode(int nErrorCode) #9|&;C5',! { cgrSd99. System.err.println("Error Code : " + nErrorCode); $~FZJ@qa } <WIIurp b=lJ`| R*:$^v@4 //停止文件下载 ~
q-Z-MA public void siteStop() uG7]s]Wdz; { K-k!':K: bStop = true; PSq?8. for(int i=0;i<nStartPos.length;i++) >b2!&dm fileSplitterFetch.splitterStop(); >p-UQc Mrrpm%Y 8C3oi&av/{ } iRrUIWx } I^k&v V //负责部分文件的抓取 EX_j|/&tZ **FileSplitterFetch.java I zTJ7E*i */ ZXb|3|D package NetFox; {`SMxDevc} 9DA|;| gJ|#xZ import java.io.*; >}
2C,8N import java.net.*; ;VKWY &233QRYM nUj`#% public class FileSplitterFetch extends Thread { 0L/chP ]\^O(BzB As46:<!2 String sURL; //File URL q3#[6! long nStartPos; //File Snippet Start Position Im~DK long nEndPos; //File Snippet End Position ]?(kaNQ"D int nThreadID; //Thread's ID ^ l#6Es boolean bDownOver = false; //Downing is over o~XK*f=( boolean bStop = false; //Stop identical 5/n L[4Z FileAccessI fileAccessI = null; //File Access interface .*`^dt nBk&+SN ^(:~8 h public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException *90dkJZ. { '/xynk%)xw this.sURL = sURL; >ZkL`!:s this.nStartPos = nStart; 5?$MZaT this.nEndPos = nEnd; Q8`V0E\~ nThreadID = id; o_Zs0/ fileAccessI = new FileAccessI(sName,nStartPos);//定位 x"q]~u<rB } TQck$&
cV6H!\ =%~- M public void run() )
Z3KO { nV8'QDQ:Al while(nStartPos < nEndPos && !bStop) fd *XK/h { s\mA3t By@65KmR" =,zB|sjn try{ CsZm8oL$ URL url = new URL(sURL); 0M;g&&mF HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); eQuw uT httpConnection.setRequestProperty("User-Agent","NetFox"); +&7V@ String sProperty = "bytes="+nStartPos+"-"; P0m9($JBD httpConnection.setRequestProperty("RANGE",sProperty); !Np7mv\7 Utility.log(sProperty); 2z
!05]B% VLm\P S
QP\:wi InputStream input = httpConnection.getInputStream(); _fk}d[q0 //logResponseHead(httpConnection); X(/fE?%; Fb1<Ic# X[.%[G|oj} byte[] b = new byte[1024]; H_f8/H int nRead; # l9VTzi while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) +#wVe { Nsh/ nStartPos += fileAccessI.write(b,0,nRead); cz IEkm //if(nThreadID == 1) qZ!kVrmg& // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {,5.svO } mQ1 C _he=SV hkl0N%[ Utility.log("Thread " + nThreadID + " is over!"); &v0]{)PO bDownOver = true; %pjY ^tM/ //nPos = fileAccessI.write (b,0,nRead); 5rLx
b } Vq0X:<9 catch(Exception e){e.printStackTrace ();} (pCHj' } $s=` {v v } W3[>IH"+ 7ucm1 axmq/8X //打印回应的头信息 neu<zSS public void logResponseHead(HttpURLConnection con) TI8\qIW { ">=E p+ix for(int i=1;;i++) L
*\[;.mk { GmNCw5F String header=con.getHeaderFieldKey(i); .*6NqX$ if(header!=null) }ACg#;>/+ //responseHeaders.put(header,httpConnection.getHeaderField(header)); }.D18bE( Utility.log(header+" : "+con.getHeaderField(header)); fr`#s\JKw else #@-dT,t break; <=_!8A } dpE^BW v3 } ,5<AV K-#Q VXZYRr3F yz0#0YG7 public void splitterStop() M*n94L=Sg& { 7./-|# bStop = true; v$@1q9 5J } ,#BD/dF 4xT /8>v2| WYRC_U7 } @?J7=}bzz
&Oz -wH0g^Ed /* bbS,pid1 **FileAccess.java :Nf(:D8 *//文件访问(定位,写) j*gZvbO;'L package NetFox; VDv.N@)7 import java.io.*; fzVN;h &b,A-1`w_ f
uU" public class FileAccessI implements Serializable{ s+_8U}R +68age;dM //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 9G6ZKqum RandomAccessFile oSavedFile; POc<XLZB long nPos; ze9n}oN W\0u[IV.x ,>qtnwvlHP public FileAccessI() throws IOException m4uh<;C~ { -#;ZZ\fdj this("",0); v1+.-hO } ^^
SMr l dg*xo9Xi` O%bltNEx1 public FileAccessI(String sName,long nPos) throws IOException =n=!s{A:t { R)N^j'R~= oSavedFile = new RandomAccessFile(sName,"rw"); rFt+Y}) this.nPos = nPos; S{F\_'% oSavedFile.seek(nPos); \I6F;G6 } =B+dhZ+#S$ XmwR^ 3HR)H-@6@7 public synchronized int write(byte[] b,int nStart,int nLen) c3rj
:QK6I { c*axw%Us int n = -1; =],c$) try{ bhg6p$411 oSavedFile.write(b,nStart,nLen); bM_fuy55Op n = nLen; +7lr#AvU/ } =d~pr:.F catch(IOException e) #/9Y}2G|] { o&k,aCQC e.printStackTrace (); >D##94PZ } #ax% n ~z41$~/ DuAix)#FN9 return n; N5#j}tT } /IX555/dR1 v13\y^t n^55G>"0| } 'tQp&pj E)p[^1WC nnu#rtvZp} /* 48;b **SiteInfoBean.java M0vX9;J */ 9 ,tk package NetFox; w!d(NA<|0] nemC-4} !-SI &qy public class SiteInfoBean { g38MF Mbly-l{| v$;URF%^ private String sSiteURL; //Site's URL 7''iT{-[p private String sFilePath; //Saved File's Path #'i,'h+F private String sFileName; //Saved File's Name B'y)bY'_dS private int nSplitter; //Count of Splited Downloading File X}QcXc.d 0E3;f;'X '['x'G50 public SiteInfoBean() I~ mu'T {//nSplitter的缺省值为5 va#].4_ //default value of nSplitter is 5 VGCd)&s this("","","",5); )T
slI } 3:OqD~,zy O
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YZ2& public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) vMJ_n=Vf { c|iTRco sSiteURL= sURL; rof9Rxxe- sFilePath = sPath; Z;dR:|%) sFileName = sName; 3^)c5kcI this.nSplitter = nSpiltter; #>z !ns @y
eAM7 ),%@X } OzTR#`oey r'*#i>PkQD M,r8 No public String getSSiteURL() NXS$w{^ { Cs vwc% return sSiteURL; p7.~k1h } :$XlYJrjK |$GPJaNqa BISH34 public void setSSiteURL(String value) (
~JtKSq% { XHJ/211 sSiteURL = value; h54\
\Ci } +
:b"0pu-H 1:{+{Yl7 W6u(+P](" public String getSFilePath() |b!Bb<5 { M~9IL\J^G return sFilePath; Hm~.u.)\. } }JUc!cH8z po*r14f Gy'/)}}Z public void setSFilePath(String value) =6qSo
@ { I5Rd~-="G sFilePath = value; +\.0Pr } H.tfn>N| {{ 1qkG9$ !Okl3
!fC public String getSFileName() rF/<}ye/4M { J8&0l&~6 return sFileName; 8K\S]SZ } 3Z}KRsp3 y
XCZs ;_/!F}d public void setSFileName(String value) uPb. uG { ,jy9\n*<t9 sFileName = value; qMd4awB
R } bhW&,"$Z TH~"y 0"mr*hyj public int getNSplitter() - G=doP0 { mU>lm7' return nSplitter; D@
BP< } Ed#Hilk' Z3 dI
B`@ }~v0o#
I public void setNSplitter(int nCount) LiEDTXRz { PJ)d5D%T nSplitter = nCount; UrdSo"% } OXV9D:bIa } (%4O\s#l .ITTY QHv) {YIVi:4q /* *3y_FTh8ra **Utility.java [-nPHmZV[ */ I%mGb$Q package NetFox; tG0
&0` 6D4 j];~X Bdib)t[ public class Utility { z2;<i|Ez0 PWS5s^WM '.XR,\g> public Utility() 4BJ w+EV8 { =^w:G =ymS M{X; H'2 vZ|Wj] ;o } ^B(:Hv}G(: t28 y=nv //线程睡眠 TcH7!fUj public static void sleep(int nSecond) 88zK)k{ { ^:ehG9 try{ &hIr@Gi@ch Thread.sleep(nSecond); a=*JyZ.2 } nO8e'&| catch(Exception e) Az6tu < { `m-7L e.printStackTrace (); |p*s:*TJp } Y-]Ne"+vf } b5l;bXp] v<gve<] //日志 35~1$uRA public static void log(String sMsg) =u.hHkx { v.>95|8 System.err.println(sMsg); +wm%`N;v< } *YP;HL A7aW] k}e~xbh-y public static void log(int sMsg) W>E|Iv[o { q) y<\cEO System.err.println(sMsg); #M[%JTTn } R(#ZaFuo[ } 5:SS2>~g gO_d!x* <!PbD /* US]I[Y6V **TestMethod.java h:<?)g~U */ b4>1UZGW- package NetFox; bfKF6 A_I\6&b4 \T^ptj(0 public class TestMethod { luCwP oN=>U"<\1 hfRxZ>O2 public TestMethod() |) CfO 4 { ///xx/weblogic60b2_win.exe e9rgJJ try{ u56WB9Z SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); jL:GP}I= //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); G@o\D-$ SiteFileFetch fileFetch = new SiteFileFetch(bean); __,F_9M fileFetch.start(); '_FxxLAO } 1( rN catch(Exception e){e.printStackTrace ();} :} D TK Pk&sY' >yqFO } r)[Xzn #? 7g_ ,7SqRY,+ public static void main(String[] args) af}JS2=$ { P$&l1Mp new TestMethod(); *)s^+F 0 } %8?XOkH) } {Hzj(c~S? 点击下载更多相关资料
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