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/* Bc&Y[u-n **SiteFileFetch.java #l 7(WG */ !A":L0[7n package NetFox; &Zy%Zz import java.io.*; rJtpTV@. import java.net.*; [SJ3FZ< #7v=#Jco Qv1<)&Ft< public class SiteFileFetch extends Thread { pm` f?Py qg1tDN`s r|av|7R SiteInfoBean siteInfoBean = null; //文件信息Bean T]oVNy long[] nStartPos; //开始位置 zPm|$d long[] nEndPos; //结束位置 `]F}O \H FileSplitterFetch[] fileSplitterFetch; //子线程对象 6 H{G$[2 long nFileLength; //文件长度 nOTe 3?i> boolean bFirst = true; //是否第一次取文件 f0M5^ boolean bStop = false; //停止标志 f9$8$O File tmpFile; //文件下载的临时信息 o*_arzhA DataOutputStream output; //输出到文件的输出流 Be;l!]i <~z@GMQCf //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 40=*Ul U- public SiteFileFetch(SiteInfoBean bean) throws IOException *{x8@|K8 { tY@+d*u siteInfoBean = bean; =W[M=_0u //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); zoibinm}Eg tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); T0|hp7WM if(tmpFile.exists ()) kltorlH { JO-FnoQK bFirst = false; @PzRHnT* read_nPos(); ,4mb05w;d } F rd>+ else <5O:jd { P1_6:USBM nStartPos = new long[bean.getNSplitter()]; &[b(Lx|i nEndPos = new long[bean.getNSplitter()]; C[R|@9NI } *)bh6b=7 VW\xuP 6qR5A+|; I+eKuWB } >1BDt:G36 bt=z6*C>A Rt.2]eZEJ public void run() |\FJ { \)M
EM=U //获得文件长度 6DVHJ+WTV //分割文件
y?'Z' //实例FileSplitterFetch blx"WVqo //启动FileSplitterFetch线程 B,b^_4XX$ //等待子线程返回 Lky T4HC8n try{ sW]>#e if(bFirst) X"!tx { EG!Nsb^, nFileLength = getFileSize(); "M}3T?0 O if(nFileLength == -1) tS3!cO\ { w!r.MWE System.err.println("File Length is not known!"); !ZS5}/ZU } {VE1c'E"V? else if(nFileLength == -2) |-9##0H { ST1;i5
System.err.println("File is not access!"); `3^%ft~l } 3[UaK`/1C else 7*eIs2aY { _ |G') 9 for(int i=0;i<nStartPos.length;i++) oM!zeJNA { Bo4iX,zu nStartPos = (long)(i*(nFileLength/nStartPos.length)); /u~L3Cp( } RDxvN:v for(int i=0;i<nEndPos.length-1;i++) ?$@E}t8g\ { D\Fu4Eg nEndPos = nStartPos[i+1]; t vp kc; } Dc9Fb^]QOG nEndPos[nEndPos.length-1] = nFileLength; W~& QcSWqD } [{PmU~RMYf }
Iuve~ugO 'tDVSj xzw2~(lo //启动子线程 ZMEYF!jN fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ,8.zbr for(int i=0;i<nStartPos.length;i++) uCjbb { Ssd7]G+n: fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !DBaC%TGC siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Wb#ON|.2 nStartPos,nEndPos,i); Yb348kRF Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /Py`a1 fileSplitterFetch.start(); ]]hsLOM] } EouI S2e;a // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), X\|h:ce siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); .-:@+=( // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", _#yd0E nEndPos = " + nFileLength); Of;$
VK' // fileSplitterFetch[nPos.length-1].start(); 6$G@>QCBS Z8:'_#^@a[ F\ %PB p //等待子线程结束 u>.>hQ //int count = 0; ^.~ F_ //是否结束while循环 ,-V7~gM%} boolean breakWhile = false; B/K{sI @<$_X1)s ;HmQRiCg while(!bStop) ^.>XDUO F { MC_i"P6a write_nPos(); eY\!}) 5 Utility.sleep(500); OSkBBo]~z breakWhile = true; gmCB4MO V4. }wz_Y 'ALe>\WO for(int i=0;i<nStartPos.length;i++) r5Xi2! { 4Y{&y6 if(!fileSplitterFetch.bDownOver) ^}4ysw { {^@qfkZz^ breakWhile = false; G3D!ifho.# break; jN%+)Kj0C) } L[Y|K%;~ } kOV6O?h if(breakWhile) }4_c~)9Q break; 7jPn6uz>w y*j8OA.S 78O5$?b;# //count++; ;f[@zo><r //if(count>4) H8$";T(I // siteStop(); (h27SLYm } r' J3\7N!u rm!.J0
X ^" 4u1 System.err.println("文件下载结束!"); ~c'R7E&Bfa } m@y_Wt catch(Exception e){e.printStackTrace ();} 4(p,@e31 } :snn-e0l % ^&D, *Vp$#Rb //获得文件长度 P"k,[ZQ public long getFileSize() 1#jvr_ ga { Ts3(,Y int nFileLength = -1; qR8 BS4q_p try{ 33w(Pw URL url = new URL(siteInfoBean.getSSiteURL()); eo'C)j# U HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); b*o,re)Dj httpConnection.setRequestProperty("User-Agent","NetFox"); !Nno@SP@ hP=z<&zb/ ]]_H|tO int responseCode=httpConnection.getResponseCode(); {-,^3PI\ if(responseCode>=400) @-BgPDi.Z { f2FGod<CzN processErrorCode(responseCode); ,E8~^\HV return -2; //-2 represent access is error BXX1G } Wg5i#6y8w E3E$_<^ uT{.\qHo String sHeader; dWhF[q" Ujss?::`G *,p16"Q; for(int i=1;;i++) Vr<ypyC { }{@RO./)[ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); O:(%m //Utility.log(in.readLine()); ?mW;%d~] sHeader=httpConnection.getHeaderFieldKey(i); -cnlj if(sHeader!=null) RYKV?f#[H { eO=!( if(sHeader.equals("Content-Length")) k<\]={|= { 7x:j4 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Y$6W~j break; O7\)C]A } von~-51; } ~*uxKEH else LdY aJh~h break; |h65[9DMP } 0-w^y<\ } ^Sz?c_<2P catch(IOException e){e.printStackTrace ();} M)!:o/!c S catch(Exception e){e.printStackTrace ();} s\i.pd:Q N3g?gb"Ex) QTjOLK$e$ Utility.log(nFileLength); DwC8?s*2H Eb=;D1)y] /WIHG0D return nFileLength; -Fs^^={Q }
LYX\# 5s2334G 7&9'=G //保存下载信息(文件指针位置) wq"AW yu private void write_nPos() D^H<)5d9 { 1MzOHE try{ me`(J y< output = new DataOutputStream(new FileOutputStream(tmpFile)); G0eJ<*|_ 3 output.writeInt(nStartPos.length); Ig6>+Mw for(int i=0;i<nStartPos.length;i++) mLn =SU{# { MF^I] 7_ // output.writeLong(nPos); P=9Zm output.writeLong(fileSplitterFetch.nStartPos); ^NTOZ0x~# output.writeLong(fileSplitterFetch.nEndPos); B.J4}Ua } >}ozEX6c2 output.close(); :}18G}B } GQ8r5V4: catch(IOException e){e.printStackTrace ();} [{B1~D- catch(Exception e){e.printStackTrace ();} q3E_.{t } kV Z5>D$ ywV8s|o WtTwY8HC //读取保存的下载信息(文件指针位置) P'6(HT>F? private void read_nPos() !S',V&Yb { 'E,Bl]8C5 try{ kM\O2ay DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); >AW=N int nCount = input.readInt(); '2%/h4jY nStartPos = new long[nCount]; V
F'!
OPN nEndPos = new long[nCount]; hOx">yki for(int i=0;i<nStartPos.length;i++) 3f:I<S7 { B1A5b=6G< nStartPos = input.readLong(); 2JYt.HN nEndPos = input.readLong(); R`:NUGR } ^50/.Z> input.close(); ;pNHT*>u, } <`q|6XWL catch(IOException e){e.printStackTrace ();} _k@{>
?(a catch(Exception e){e.printStackTrace ();} a".uS4x } Wwf#PcC] 5i$~1ZC Yn}_"FO' private void processErrorCode(int nErrorCode) 9c=_p'G3Fw { -$4%@Z System.err.println("Error Code : " + nErrorCode); WLWE%bDP } ?WX&,ew~ Cs
%-f" BKm$H!u //停止文件下载 EhybaRy;C public void siteStop() ?fEX&t,' { hqY9\,.C bStop = true; ${ ~UA6 for(int i=0;i<nStartPos.length;i++) MNiu5-g5 fileSplitterFetch.splitterStop(); p\8cl/~ (;a
O% J7.bFW' } >M^
1m( } [lA[wCw //负责部分文件的抓取 8P!dk5,,O **FileSplitterFetch.java ys;e2xekg */ @"HR"@pX package NetFox; ?Y'S
/ u
hP0Zwn O`dob&C import java.io.*; :u{0M& import java.net.*; dTaR8i As (C8C< h& (@gU`A public class FileSplitterFetch extends Thread { 2`vCQV rA9x T` C<fNIc~. String sURL; //File URL *ftJ( long nStartPos; //File Snippet Start Position fT8Id\6js long nEndPos; //File Snippet End Position EBM\p+x& int nThreadID; //Thread's ID 64\Z OG\, boolean bDownOver = false; //Downing is over c`X'Q)c&K boolean bStop = false; //Stop identical $YSD%/c FileAccessI fileAccessI = null; //File Access interface x[}e1sXXs C)z[Blt &u"*vG (U[ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException A0rdQmrOL { Ytx+7OLe this.sURL = sURL; ojVpw4y. this.nStartPos = nStart; BPrA*u}T this.nEndPos = nEnd; 4_N)1u ! nThreadID = id; ja7Zv[ fileAccessI = new FileAccessI(sName,nStartPos);//定位 gH\r# wy| } 0 \LkJ*i dtM@iDljj #G.3a]p}" public void run() 2a=WT`xf? { %T6#c7U_ while(nStartPos < nEndPos && !bStop) ''BP4=r5n { !Y]}&pUP +ZE&]BO{ <\^X,,WtO try{ @?Y^=0 URL url = new URL(sURL);
OV8b~k4= HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); R/^JyL httpConnection.setRequestProperty("User-Agent","NetFox"); cT0utR& String sProperty = "bytes="+nStartPos+"-"; 0uU%jN$ httpConnection.setRequestProperty("RANGE",sProperty); 4&ea*w Utility.log(sProperty); MmWJYF= &OhKx SC2C%.%l` InputStream input = httpConnection.getInputStream(); qqzQKN //logResponseHead(httpConnection); t48(GKF {C]M]b*F6( 4rM77Uw> byte[] b = new byte[1024]; 1wc
-v@E int nRead; -'PpY302 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 6eDIS|/ { GYO\l.%V5y nStartPos += fileAccessI.write(b,0,nRead); 7Xad2wXn //if(nThreadID == 1) iY|YEi8 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qfSoF| } fSqbGoIQ dBlOU.B M2@q{RiS Utility.log("Thread " + nThreadID + " is over!"); 50DPzn bDownOver = true; NNl/'ge<\ //nPos = fileAccessI.write (b,0,nRead); M@'V4oUz } (C-z8R
Z6 catch(Exception e){e.printStackTrace ();} WQ5sC[& } &YT7>z, } Bd
NuhV`0 i9!Urq- =|U2 }U; //打印回应的头信息 4G>|It public void logResponseHead(HttpURLConnection con) =(n'#mV { 3K?0PRg for(int i=1;;i++) 3yKI2en" { AVyZ#`, String header=con.getHeaderFieldKey(i); MW`a>'0t? if(header!=null) /a$+EQ$ //responseHeaders.put(header,httpConnection.getHeaderField(header)); D`t e|K5 Utility.log(header+" : "+con.getHeaderField(header)); rmMO-!s else Yip9K[ break; >|Jw,,uf } jujx3rnK? } D} .t 3-mw-;. ,K9UT#h public void splitterStop() `C*!de]Y% { f<w*l<@ bStop = true; VNYLps@4H } <Y#R]gf1 \4j+pU 4o*V12_r'4 } pK8nzGQl7 __ mtZ{ (j~V /* 9#iDrZW **FileAccess.java 5dgBSL$A}] *//文件访问(定位,写) JA{YdB;il package NetFox; ^mum5j import java.io.*; ]Qu12Wg}P tl)}Be+Dt; .d"+M{I public class FileAccessI implements Serializable{ oX}n"5o: R{[Q+y'E //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 "T&uS1+=c RandomAccessFile oSavedFile; uWWv`bI>x long nPos; NdNfai %7d"()L n21$57`4 public FileAccessI() throws IOException c}QJ-I { wi9| this("",0); Q
jBCkx]g } Yjl0Pz.q }-L@AC/\# t3GK{X public FileAccessI(String sName,long nPos) throws IOException d_,tXV"z& { m@,>d_|-K- oSavedFile = new RandomAccessFile(sName,"rw"); yQA[X} this.nPos = nPos; epbp9[` oSavedFile.seek(nPos); =a!6EkX
* } pMquu&Td V1:3 ]T51;j'48 public synchronized int write(byte[] b,int nStart,int nLen) |f:d72{Qr { q8h{-^" int n = -1; Qwa"AY5pW try{ gr?pvf!I oSavedFile.write(b,nStart,nLen); @
RI^wZ-; n = nLen; 'sF563kE } d>`(.qvxR catch(IOException e) K%}I}8M { Q#Y3%WF e.printStackTrace (); H n!vTB } h(8;7}K o3yqG#dA cx,A.Lc return n; +lT]s#Fif } wY.g-3 ]= NYvv>H Dq?HUb^X } +zdkdS,2< +r$.v|6 /
3k\kkv! /* 0tqR wKL **SiteInfoBean.java ee_\_" */ Tqa4~|6 package NetFox; 9AYe,R %~5Q^3$O L%d?eHF public class SiteInfoBean { 12PE{Mut lDU:EJ&DHE h<K;VpL6 private String sSiteURL; //Site's URL N ]7a= private String sFilePath; //Saved File's Path zsXH{atY private String sFileName; //Saved File's Name t4k'9Y:\Q private int nSplitter; //Count of Splited Downloading File 'q'Y:A?, 8~)[d!' vEe public SiteInfoBean() ++!E9GU{ {//nSplitter的缺省值为5 'TrrOq4 //default value of nSplitter is 5 G
r|@CZq this("","","",5); j$|C/E5? } r65NKiQD 3Gl]g/ otSPi7|k public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) C5 5n { Kg`x9._2 sSiteURL= sURL; 7=.VqC^ sFilePath = sPath; Z{
Zox[/ sFileName = sName; G^ZkY this.nSplitter = nSpiltter; &8AS=v un^IQMIh
_O;~
}N4u } fJw=7t-t 56Y5kxmi :J`!'{r public String getSSiteURL() C)96/k { i>Bi&azx return sSiteURL; 6&QTVdK'O } 7 3z
Y^x 9H}iX0O A4Q)YY9~ public void setSSiteURL(String value) 6+;2B<II { iB3+KR sSiteURL = value; f5b`gvCY,# } pd>a6 lI` ~R@m!'Ik :/[YY?pg- public String getSFilePath() :
|*,Lwvd { sHTePEJ_h return sFilePath; w52HN;Jm } y]YS2^ }Q=se[(( Zc3:9 public void setSFilePath(String value) 5652'p { Z^`=!n-V sFilePath = value; g}
~<!VpX } 3:8nwt lcT+$4zk. TnBG MI,g' public String getSFileName() ]<;i}n|
< { WUWb5xA return sFileName; Rf(x^J{ } ]AC!R{H u1|P'>;lF \m~\,em public void setSFileName(String value) A[ECa{v { 2V2x,! sFileName = value; UE,~_hp } ~R?dDL 9Oo*8wvGG ;Jbc'V'fm public int getNSplitter() k *;{n8o?) { Sp~Gv>uMK return nSplitter; FX|lhwmc( } KpbZnW}g FSwgPIO> h>^jq{yu public void setNSplitter(int nCount) :
9?Cm` { ,Z*3,/a nSplitter = nCount; K?Xo3W%K } 1[/$ZYk: } d[RWkk5 n|mJE,N >H1|c%w /* .f !]@"\ **Utility.java 7z&adkG: */ 'q};L 6 package NetFox; >uchF8)e| qtwT#z;Y ;[OJ-|Q public class Utility { @maZlw1q itC *Z6^ %I|+_ z&x public Utility() vBnKu { $XQ;~i
q:-]d0B+ lq\' } F'UguC"> Dmm r]~ //线程睡眠 fs3-rXoB public static void sleep(int nSecond) CVGOX z { ]EVe@ try{ o3i,B),K Thread.sleep(nSecond); Xc9p;B>^Ts } <(bCz>o| catch(Exception e) N+C)/EN$ { \o62OfF! e.printStackTrace (); FU(}=5n } zhA',p@K?_ } ^iV`g?z .e FOfV) //日志 l)i&ATvCE public static void log(String sMsg) Q/3tg { ph8Jn+|E System.err.println(sMsg); |>IUtUg\ } 0?6If+AC :?$Sb8OuIL ){:q;E]^fB public static void log(int sMsg) 47C(\\ { 0V>ESyae5 System.err.println(sMsg); X@bn?? } QWzOp\+ } r(,= uLc 4Wi8$ DYT@BiW{ /* M}=s3[d(, **TestMethod.java #7-kL7 MK] */ \8> package NetFox; 0\EpH[m}- k%Ma4_Z wuBlFUSg public class TestMethod { z<yNG/M1>U e>?_)B4 7Ykj#"BZ public TestMethod() ^)9MzD^_nV { ///xx/weblogic60b2_win.exe xs2,t*
try{ *l> [`U+ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ;T5,T //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 6Q.{llO SiteFileFetch fileFetch = new SiteFileFetch(bean); wO2V%v^bp fileFetch.start(); ,c,Xd } RV0>-@/x catch(Exception e){e.printStackTrace ();} z)58\rtz H-/; l54E .g/ARwM} } []A"]p ]k::J>84 ?AeHVQ
:C public static void main(String[] args) z`emKFbv { >%uAQiU new TestMethod(); :rz9M@7 } 3~[`[4n^ } p@?7^nIR*u 点击下载更多相关资料
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