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/* CY1Z' **SiteFileFetch.java vt8By@]: */ TxD#9]Q` package NetFox; ~ a: import java.io.*; qna8|3eP import java.net.*; XZ7Lk)IR
)2.Si# AKC`TA*E public class SiteFileFetch extends Thread { XwmL.Gg:]7 ?
k /` 3u=g6W2 F SiteInfoBean siteInfoBean = null; //文件信息Bean KPF1cJ2N long[] nStartPos; //开始位置 QV!up^Zso long[] nEndPos; //结束位置 Sc0w.5m6 FileSplitterFetch[] fileSplitterFetch; //子线程对象 r;{.%s7 long nFileLength; //文件长度 C _Dn{ boolean bFirst = true; //是否第一次取文件 U/U);frH boolean bStop = false; //停止标志 t0S1QC+ File tmpFile; //文件下载的临时信息 t_^4`dW` DataOutputStream output; //输出到文件的输出流
ep8 d6O[ @CyP //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) mt
.sucT public SiteFileFetch(SiteInfoBean bean) throws IOException KoT\pY^7\ { f#;> g siteInfoBean = bean; @dKTx#gZ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); J5qZFD tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); _)8s'MjA:& if(tmpFile.exists ()) ,bi^P>X { 9w"*y#_ bFirst = false; 4 KiY6) read_nPos(); 6m93puY`7 } V0@=^Bls else .A|udZ, { [JiH\+XLPs nStartPos = new long[bean.getNSplitter()]; CJ}%W# nEndPos = new long[bean.getNSplitter()]; 1zv'.uu., } 4RO}<$Nx} W\3X=@|u) **%37 ~ljXzD93Z } 3fj4%P" M3\AY30L ?s01@f# public void run() <~)P7~$d?p { +7Gwg //获得文件长度 [n@]
r2g)3 //分割文件 %b$>qW\*& //实例FileSplitterFetch [txE .7p //启动FileSplitterFetch线程 )9g2D`a4 //等待子线程返回 Lbgi7|& try{ y[;>#j$ if(bFirst) 1EK*g;H { ="+#W6bZT nFileLength = getFileSize(); Txu/{M, if(nFileLength == -1) 2/?|&[ { P.cyO3l System.err.println("File Length is not known!"); KlEpzJ98 } Jy)/%p~ else if(nFileLength == -2) 5pX6t { _BufO7`. System.err.println("File is not access!"); ("KF'fp&M2 } 1MFbQs^ else [Xkx_B { hN_]6,<\ for(int i=0;i<nStartPos.length;i++) =;L|gtH" { $xsd~L& nStartPos = (long)(i*(nFileLength/nStartPos.length)); wYea\^co } c<~H(k'+c for(int i=0;i<nEndPos.length-1;i++) U{mYTN*:j$ { }MySaL> nEndPos = nStartPos[i+1]; "]*tLL:` } k$Vl fQ'+ nEndPos[nEndPos.length-1] = nFileLength; >P(.:_^p } [),ige }
(3e2c tbr=aY$jY u8^lB7!e/ //启动子线程 WH\d| 1) fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Iu{V,U for(int i=0;i<nStartPos.length;i++) ib m4fa { rv;3~'V fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~*7]r`6\@ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 'u658Tj nStartPos,nEndPos,i); y_,bu^+* Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *8q.YuZ fileSplitterFetch.start(); 4-w{BZuS } DG/Pb)%Y
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), KvSG; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [
~,AfY // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", (H]AR8%W nEndPos = " + nFileLength); 1YA% -~ // fileSplitterFetch[nPos.length-1].start(); [aS*%Heu & kIFcd@ 'qi}|I //等待子线程结束 :gT4K-Oj //int count = 0; E^PB)D(. //是否结束while循环 J,G
lIv.A boolean breakWhile = false; =41xkAMnk X]=t> |{;G2G1[ while(!bStop) ^aQ"E9 { ivPg9J1S write_nPos(); $(
)>g>% Utility.sleep(500); Bx!-"e breakWhile = true; ;4a{$Lw~^9 !wNO8;( VL^EHb7 for(int i=0;i<nStartPos.length;i++) f::Dx1VcX { Mtv?:q if(!fileSplitterFetch.bDownOver)
OSJ$d { \jA~9 breakWhile = false; >7r!~+B"9' break; #g=XUZ/" } Q&&@v4L }
xPgBV~ if(breakWhile) E9}C # break; DJir { \F F?cK-. 23?rEhKe //count++; F/Pep?' //if(count>4) Wm|lSisY // siteStop(); h1{3njdr } H:G1BZjq iCyfOh Gy)@Is9 System.err.println("文件下载结束!"); <ih[TtZ } b[7]F catch(Exception e){e.printStackTrace ();} %bfZn9_m } 2-b6gc7 PVOv[% XUw/2"D'? //获得文件长度 wAd9 public long getFileSize() fzA9'i` { "\=U)CJ int nFileLength = -1; =2 kG%9 try{ rbpSg7}Q URL url = new URL(siteInfoBean.getSSiteURL()); _2nx^E(pd HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); $A`VYJtt# httpConnection.setRequestProperty("User-Agent","NetFox"); %IRi1EmN8 H.2QKws^F Lp7SLkwh3M int responseCode=httpConnection.getResponseCode(); ;GhNKPY if(responseCode>=400) :@)>r9N { ?
qA]w9x processErrorCode(responseCode); =ruao'A return -2; //-2 represent access is error }T$p)" } :eg4z ) '=6\v! 9S -9.mvop String sHeader; B]$GSEB 7=DdrG< V_:&S2j for(int i=1;;i++) `KQvJjA6 { P2*<GjV`S/ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); F/A|(AH' //Utility.log(in.readLine()); H4JTGt1" sHeader=httpConnection.getHeaderFieldKey(i); 9M9?%N:ra if(sHeader!=null) T5:G$-qL( { F3N6{ysK# if(sHeader.equals("Content-Length")) Ki~1qu: { @<Yy{~L| nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); pBPl6%C.X- break; n}77##+R&C } _7)n(1h[3b } ~WN:DXn else D )'bH5 break; L~>i, } ;ZG\p TCA } 0C*7K?/ catch(IOException e){e.printStackTrace ();} -o.:P>/ catch(Exception e){e.printStackTrace ();} zA"`!}* 5P$4 =z91 Zsh9>]ML Utility.log(nFileLength); 9<)NvU^-r v]c6R-U S/I /-Bp~ return nFileLength; s|B3~Q] } CsifKHI PAOJ\U ivz5H(b //保存下载信息(文件指针位置) o7LuKRl
private void write_nPos() 5Zva: { f0aKlhEC try{ ]}(H0?OQR output = new DataOutputStream(new FileOutputStream(tmpFile)); l?^4!&Nm output.writeInt(nStartPos.length); U!Z,xx[] for(int i=0;i<nStartPos.length;i++) SG4%}wn% { % -e 82J1 // output.writeLong(nPos); g2/8~cn8z output.writeLong(fileSplitterFetch.nStartPos); xpx\=iAe output.writeLong(fileSplitterFetch.nEndPos); :Qf '2.h) } :TC@tM~Oy output.close(); NS6:yX,/ } Q'mM3pq4r catch(IOException e){e.printStackTrace ();} !o[7wKrXb catch(Exception e){e.printStackTrace ();} Oh\<VvZuN } 0tB0@Wj M_w<m _M5|Y@XN- //读取保存的下载信息(文件指针位置) HuKc9U'7A private void read_nPos() f &wb {
H =^`! try{ usL*
x9i DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); \qK&q int nCount = input.readInt(); =+MPFhvg! nStartPos = new long[nCount]; g]yBA7/S" nEndPos = new long[nCount]; %O;bAC_M for(int i=0;i<nStartPos.length;i++) bl(RyAgA { JNUt$h nStartPos = input.readLong(); B=A [ymm nEndPos = input.readLong(); pDCeQ6? } e?ly H input.close(); w+E,INdi } pWsDzb6?% catch(IOException e){e.printStackTrace ();} QM#4uI55B catch(Exception e){e.printStackTrace ();} )Z ?Ym.0/ } )fSOi||C :|8M`18lZ Zt.|oYH$ private void processErrorCode(int nErrorCode) tX %5BTv { '>ssqBnI System.err.println("Error Code : " + nErrorCode); Z//+Gw<' } vf%&4\ib Q_X.rUL0w !XCm>]R //停止文件下载 "z=SO1 public void siteStop() l
+OFw)8od { thM4vq bStop = true; Uu(SR/R} for(int i=0;i<nStartPos.length;i++) os={PQRD fileSplitterFetch.splitterStop(); :G2k5xD/E QKN+>X /M4{Wc } ,TN
2 } 72y0/FJ //负责部分文件的抓取 Z}l3l`h! **FileSplitterFetch.java pDIVZC */ ^_u kLzP9 package NetFox; DSk/q-'u khrb-IY@ xt%7@/hiE import java.io.*; DhT>']Z import java.net.*; OJ$]V,Z00x D+z?wuXk FCuB\Q public class FileSplitterFetch extends Thread { ^1aAjYFn 7-T{a<g s6zNV4 String sURL; //File URL xz{IH,?IG long nStartPos; //File Snippet Start Position %\r!7@Q long nEndPos; //File Snippet End Position oK%K}{` int nThreadID; //Thread's ID ?Ovqp-sw boolean bDownOver = false; //Downing is over ]U7KLUY>: boolean bStop = false; //Stop identical dwd:6.J( FileAccessI fileAccessI = null; //File Access interface u(t#Ze~Y1 :`2=@ .
n>`as public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException [[Y0 { ['*8IWg this.sURL = sURL; OdY=z!Fls this.nStartPos = nStart; DHT&,= this.nEndPos = nEnd; k`p74MWu nThreadID = id; {TRsd fileAccessI = new FileAccessI(sName,nStartPos);//定位 _#}n~}d } 01. &>Duw SdwS= (e6 ]B]*/ public void run() Z)xaJGbw { t2iv(swTe while(nStartPos < nEndPos && !bStop) xvSuPP4 m { 3y~r72J S#Sb ] m&iH2| try{ [kgdv6E URL url = new URL(sURL); \y{Tn@7 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); rf%7b8[v httpConnection.setRequestProperty("User-Agent","NetFox"); p/
>`[I String sProperty = "bytes="+nStartPos+"-"; [e4]"v`N httpConnection.setRequestProperty("RANGE",sProperty); 2kUxD8BcN Utility.log(sProperty); y tf b$;| U"4?9.
k T'aec]u InputStream input = httpConnection.getInputStream(); 7 +@qB]Bi< //logResponseHead(httpConnection); #vqo -y7@ 79yd&5#e? HH>:g(bu byte[] b = new byte[1024]; VCcr3Dx()F int nRead; e~T@~(fft while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) K!mOr { %D`,k*X nStartPos += fileAccessI.write(b,0,nRead); 0G2g4DSKD //if(nThreadID == 1) 5Fm=/o1 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Wi}FY }f } pBC<u 5Y3i|cj ;!T{%-tP Utility.log("Thread " + nThreadID + " is over!"); cubk]~VD bDownOver = true; S-nlr@w8 //nPos = fileAccessI.write (b,0,nRead); Z_1*YRBY; } ^R$'eG 4L? catch(Exception e){e.printStackTrace ();} -n? g~(/P } p=QYc)3F } jUqy8q& +"g~"< 4E:bp //打印回应的头信息 ksjUr 1o public void logResponseHead(HttpURLConnection con) 9(!]NNf! { xDO7A5 for(int i=1;;i++) mty1p'^KQ { ,A5) <} String header=con.getHeaderFieldKey(i); )OsLrq/ if(header!=null) (HN4g;{ //responseHeaders.put(header,httpConnection.getHeaderField(header)); ,`8Y8 Utility.log(header+" : "+con.getHeaderField(header)); WnAd5#G else "MiD8wX- break; h.whjiCFa } )J3kxmlzQ } HpexH{.u) #rYENR[ H%z@h~s> public void splitterStop() em]xtya { T_OF7? bStop = true; K.SeK3( } 5GAy "Xd 1:= `Y@.S 3An(jt$%Q } =<<3Pkv7@ hGP1(pH. /CT(k1> /* H*W):j}8 **FileAccess.java =J|sbY"] *//文件访问(定位,写) y?N Nz0 package NetFox; +EAS Aq import java.io.*; Eo{EKI1 G"S5ki`o a]VGUW- public class FileAccessI implements Serializable{ F1A1@{8bN 9[|4[3K //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 BGjb`U#%3 RandomAccessFile oSavedFile; j.QHkI1. long nPos; +*t|yKO>[ C;sgK Rk<%r k public FileAccessI() throws IOException K~>jApZ% { U4_"aT>My this("",0); bc}dYK3$q } 1-$P0 vbn>mg5 cjg=nTsBA public FileAccessI(String sName,long nPos) throws IOException d1NE% hg3 { YMAQ+A! oSavedFile = new RandomAccessFile(sName,"rw"); 8t9aHla this.nPos = nPos; O:u%7V/ oSavedFile.seek(nPos); YkbO&~. } 6`"ZsO U,3d) ]Zy& Cj$H[K}> public synchronized int write(byte[] b,int nStart,int nLen) FT_k^CC { R`C.ha int n = -1; l%bq2,-% try{ Y\u_+CG* oSavedFile.write(b,nStart,nLen); 0Uaem n = nLen; n1)'cS5} } &enlAV'#)O catch(IOException e) oUS,+e { AJWLEc4XK e.printStackTrace (); QX/]gX } B'/Icg.T v|To+P6b ={xqNRVd return n; 83xd@-czgh } *cy.*@d >%i9 oI<) ,^!Zm^4, } GFY-IC+fc Zr R+QV K*[0dza$ /* 9H8=eJd **SiteInfoBean.java \y,;Cfl< */ T/5nu?v package NetFox; m^c%]5$ K5+!(5V~ l^BEFk; public class SiteInfoBean { 0c-QIr}m _jk|}IB;X F94V 5_[ private String sSiteURL; //Site's URL o8mo=V4j private String sFilePath; //Saved File's Path pV_}Or_ private String sFileName; //Saved File's Name tc5M$b3^2 private int nSplitter; //Count of Splited Downloading File F1/6&u9I frk7^5 9c:5t'Qt5. public SiteInfoBean() 2kC^7ZAwu {//nSplitter的缺省值为5 Za34/ro/T //default value of nSplitter is 5 # e$\~c Pd this("","","",5); 0U9+ } nO-d"S* M2a}x+5' x ru(Le}E public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) M3)v-" { _dz+2au sSiteURL= sURL; fHW-Je7mG sFilePath = sPath; W&WB@)ie sFileName = sName; 9F/|` this.nSplitter = nSpiltter; J: L -15 R
A*(|n> #^"hqNwA } \-DM-NrZ1U 7^`RP e^a+ aS3P(s L public String getSSiteURL() ks)fQFSbu { YmdsI+DbIu return sSiteURL; oM/B.U2a } (*LTqC ?S+/QyjcfJ W,0KBkkp public void setSSiteURL(String value) sxf}Mmsk { `#-p,NElV sSiteURL = value; 4da^d9ZOy } E!r4AjaC O@G<B8U,K tsCz+MP public String getSFilePath() s0x@
u { L5hQdT/b$ return sFilePath; {"qW~S90YO } ;igEIGR \ x>NB wWp?HDl"M public void setSFilePath(String value) o{s4.LKK { NB~*sP-l& sFilePath = value; &lO Xi?&" } 1q;I7_{ 2 roK4RYJ7) >KH(nc$ public String getSFileName() J
tn&o"C { :Kt{t46) return sFileName; arpJiG~JR } &q"uy:Rd rzc 3k~@ '6Rs0__ public void setSFileName(String value) C5W- B8> { lcuH]z sFileName = value; F~11 _ } RMs1{64: 06j)P6Iju d@`-!" public int getNSplitter() EHE6-^F { AmrJ_YP/t~ return nSplitter; l.Lc]ZpB } AH ?MJKY@Z b W`)CWd )2*|WHO public void setNSplitter(int nCount)
t}* qs { +L<w."WG nSplitter = nCount; pB{ f-M:D } +LU ). } Xl
'\krz RvZryA*vu ^{:[^$f:l /* ,m_&eF **Utility.java hKH
Q!`&v */ [s&
y_[S package NetFox; 2oNPR+
- itvy[b-* :O_<K& public class Utility { e^K=8IW ,YuWz$aF{ bN~'cs8 e public Utility() K<fq=:I3 { okW)s*7 G5Dji_ | -$Z-hxs^ } ~(L<uFU V :8/M6-EK //线程睡眠 .LVOaxT public static void sleep(int nSecond) . KSr@Gz { `5aypJf1 try{ S7~l%G>]b Thread.sleep(nSecond); 9\;/-0P } _}%#Yz catch(Exception e) Zm'::+tl { X+G*Q}5 e.printStackTrace (); BsG[#4KM: } =u1w\>( 2Y } 5v03<m0`y 0GLB3I > //日志 H@bmLq public static void log(String sMsg) [/`Hz]R { 7m)ykq:? System.err.println(sMsg); \<+47+ } 2ZFKjj Z.#glmw^=R SNV+.xN public static void log(int sMsg) BY2txLLB { :JG}% System.err.println(sMsg); _|#|mb4Fe } \.-y
LS. } FbT&w4Um= ].+G-<.: -2~yc2:>A /* ]cY'6'}Hz **TestMethod.java wAwH8x LU */ i3!$M/_] package NetFox; ?At-
m<HjL L&k$4,Z9 public class TestMethod { %Q4w9d w%u[~T7OI PqeQe5 public TestMethod() 2PW3S{D t { ///xx/weblogic60b2_win.exe .aRxqFi_ try{ 1;9E*= SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); uy%PTi+A //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); -5B([jHgR SiteFileFetch fileFetch = new SiteFileFetch(bean); 43]&SXprH fileFetch.start(); oU6g5 } ~Q\uP(!D catch(Exception e){e.printStackTrace ();} { J%$.D(/ DcM+K@1E4^ `SbX`a0p2 } T$B4DQ eEFT(e5.>3 eWs^[^c.< public static void main(String[] args) jWCC`0
T { <qiap2 new TestMethod(); #FM 'S| } E8 )*HOT_T } 30-wTcG 点击下载更多相关资料
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