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/* 8cHE[I **SiteFileFetch.java Kud'pZ{P */ ZkB3[$4C=5 package NetFox; VF0dE import java.io.*; 6gOe!mm import java.net.*; NBl
__q O_K_f+7 L(&}Wv public class SiteFileFetch extends Thread { [RU
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oQ+61!5> L4f7s7rJ SiteInfoBean siteInfoBean = null; //文件信息Bean Y@ F long[] nStartPos; //开始位置 pw'wWZE' long[] nEndPos; //结束位置 h7qBp300 FileSplitterFetch[] fileSplitterFetch; //子线程对象 MEwdw3 long nFileLength; //文件长度 |)_-Bi;MW` boolean bFirst = true; //是否第一次取文件 &S74mV boolean bStop = false; //停止标志 ZI ?W5ISdg File tmpFile; //文件下载的临时信息 6ew "fCrH! DataOutputStream output; //输出到文件的输出流 2H?d+6Pt3 n"aCt%v //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) wX1ig public SiteFileFetch(SiteInfoBean bean) throws IOException fMK#x\.4 { H l j6$%. siteInfoBean = bean; FquFRx //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Tvf~P w tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); L*?!Z^k if(tmpFile.exists ()) EY>8O+ { lj &>cScC bFirst = false; Zzd/K^gg read_nPos(); +lO'wa7|3 } igDyp0t else nbd Gt { EH`0 nStartPos = new long[bean.getNSplitter()]; %hT4qzJj nEndPos = new long[bean.getNSplitter()]; aW5~Be$
_ } qJ[@:&: 9EF~l9`'U L~FTr 9( VRq^Z1 } BH : :_d3//| w! q& public void run() I6OSC&A` { <6N_at3 //获得文件长度 JE%A|R<Jl //分割文件 q"aPJ0ni' //实例FileSplitterFetch QV,E#(\5 //启动FileSplitterFetch线程 nx4P^PC //等待子线程返回 >mIg@knE try{ DacJ,in_I{ if(bFirst) fB#XhO { &y:CW>T$/X nFileLength = getFileSize(); J^H=i)A if(nFileLength == -1) IKf`[_,t] { |PM m?2^ R System.err.println("File Length is not known!"); A1JzW)B } LR$z0rDEM else if(nFileLength == -2) q9}2 { shi
Hy*(v System.err.println("File is not access!"); x%XT2+ } ;A^K_w' else l`rC0kJ] { By)3*<5a_ for(int i=0;i<nStartPos.length;i++) ]O@"\_} { Xm[Czd]% nStartPos = (long)(i*(nFileLength/nStartPos.length)); zv%J=N$G } {$TZ}z"DA for(int i=0;i<nEndPos.length-1;i++) E#h~V5Tf { .Dv=pB,u nEndPos = nStartPos[i+1]; 3&J&^O } VJ1*|r, nEndPos[nEndPos.length-1] = nFileLength; q`loOm=y } :Ee ?K } ],?pe .98.G4J> ul}'{|4 //启动子线程 q,,j',8kq/ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; (UW6F4:$ for(int i=0;i<nStartPos.length;i++) (
Yi=v'd { ^]rxhpS fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), u_'nOle
K siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), G\mKCaI8 nStartPos,nEndPos,i);
<qn, Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); L[]^{ O fileSplitterFetch.start(); a@SUi~+3 } 2NR7V*A // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =K6c; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); LkaG[^tfN // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", <P pYl nEndPos = " + nFileLength); U(3(ZqP // fileSplitterFetch[nPos.length-1].start(); 9A*rE.B+W ?cBO6^ Q eK{MF //等待子线程结束 97x%2.\: //int count = 0; j#o3 //是否结束while循环 %AgA -pBp boolean breakWhile = false; t,?,F4j Zi3T~:0p: Sf5]=F-w while(!bStop) Hd*Fc=>"Y { QE6El'S write_nPos(); |B|@GF?: Utility.sleep(500); yam}x*O\xn breakWhile = true; BA`:miH< UG=I~{L <rMv0y+r for(int i=0;i<nStartPos.length;i++) ,9UCb$mh { "8_,tYAH if(!fileSplitterFetch.bDownOver) .P%ym~S { zW)gC9_|m- breakWhile = false; E.#6;HHzN break; KZ4zF } 1*#bfeoM } 5h(jeT8" if(breakWhile) u7(]; break; =f4<({9 \CtQ*[FmN ,7I},sZj //count++; ioWJj.% //if(count>4) NE[y|/ // siteStop(); aL 8Gnqf2 } ;&7,73! .S6ji~;r CjmV+%b4 System.err.println("文件下载结束!"); 9RB`$5F;
} '2wCP
EC catch(Exception e){e.printStackTrace ();} kXCY))vnn } )DRkS,I 4n4j=x]@ #'c%
//获得文件长度 v<+4BjV!J} public long getFileSize() _2; ^v`[ { a G@nErdW int nFileLength = -1; +0U#.|? try{ z[Z2H5[ URL url = new URL(siteInfoBean.getSSiteURL()); hafECs HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); tU(y~)] httpConnection.setRequestProperty("User-Agent","NetFox"); Y@ObwKcG Kc-4W6?$ v#Sj|47 int responseCode=httpConnection.getResponseCode(); n/?eZx1 if(responseCode>=400) BMY>a { u'=(&>< processErrorCode(responseCode); TIETj~+ return -2; //-2 represent access is error 0 S2v"(_T } pIvfmIm 3)xb nRk hXPocP String sHeader; #_{0Ndp2 6#O#T;f) /'mrDb_ip for(int i=1;;i++) ,y{0bq9*2 {
_2#zeT5 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); CQ$::; //Utility.log(in.readLine()); 6SV7\,2M sHeader=httpConnection.getHeaderFieldKey(i); k*OvcYL1A if(sHeader!=null) %`eJ66T { F G3Sk!O6 if(sHeader.equals("Content-Length")) ,zD_% ox { xl3zy~;M nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); D {Oq\* break; &0JK38( } Y+5"uq<' } .<HC[ls else /%5_~Jkr, break; ;m''9z)2 } E*OG-r } YsZ{1W catch(IOException e){e.printStackTrace ();} z'_&|-m catch(Exception e){e.printStackTrace ();} .#sz|0 |7]?>- Yg[ v/[] Utility.log(nFileLength); _Q)d+Fl |.Em_*VG F. }l(KuJ return nFileLength; %v_IX2' } @81-kdTx sRi?]9JIl _O"L1Let //保存下载信息(文件指针位置) (*MNox?w private void write_nPos() B>sCP"/uV { ix^gAot try{ O@nqHZ output = new DataOutputStream(new FileOutputStream(tmpFile)); QH4k!^ output.writeInt(nStartPos.length); AfUZO^< for(int i=0;i<nStartPos.length;i++) qQL.c+%L { 5dqQws-,?1 // output.writeLong(nPos); 8^8>qSD1 output.writeLong(fileSplitterFetch.nStartPos); qw|JJ output.writeLong(fileSplitterFetch.nEndPos); o>@=N2n } -MDOZz\ output.close(); ) @!~8<_" } HOq4i! catch(IOException e){e.printStackTrace ();} 5/tj catch(Exception e){e.printStackTrace ();} 7AI3|Ts]p } J `YnT @+iC/ 4 #aqz9k //读取保存的下载信息(文件指针位置) %)8d{1at private void read_nPos() Ica3 { 4sb )^3T try{ xIM8 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); =Na/3\^WP int nCount = input.readInt(); qx Wgt(Os nStartPos = new long[nCount]; IY V-*/
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nEndPos = new long[nCount]; 3\7'm] for(int i=0;i<nStartPos.length;i++) Vu_&~z7h { Z"-ntx# nStartPos = input.readLong(); 4pLQ"&>}80 nEndPos = input.readLong(); xy$vYDAFw } ]}p2Tp;1 input.close(); RV(
w%g } Tku/OG' catch(IOException e){e.printStackTrace ();} 1po"gVot catch(Exception e){e.printStackTrace ();} ,c@r`
x } cT_uJbP+ Lwp-2`% Hr
/W6C private void processErrorCode(int nErrorCode) #!w:_T% { {An8/"bv} System.err.println("Error Code : " + nErrorCode); lr`?yn1D( } ~^^!"- /z/hUa +xn&K"]:3 //停止文件下载 4\&H?:c. public void siteStop() ?UxG/]", { >BJ2v=RA bStop = true; cC b>zI for(int i=0;i<nStartPos.length;i++) ;>inT7?3| fileSplitterFetch.splitterStop(); w/qQ(]n8 uG2Xkj yEE|e> } hm*Th } 2~#ZO?jE6 //负责部分文件的抓取 J f\Qf **FileSplitterFetch.java ?nB helW^ */ (hpTJsZ package NetFox; :[A?A4l ,@}W@GGP) :5r:I[FFy import java.io.*; PXOrOK import java.net.*; T^KCB\\< 2.^7?ok CbnR<W-j public class FileSplitterFetch extends Thread { 5JQd)[Im g@$0FY{Q bq c;.4$ String sURL; //File URL /Lq;w'|I long nStartPos; //File Snippet Start Position Sja"(sJ long nEndPos; //File Snippet End Position U,oD44 int nThreadID; //Thread's ID bk/.<Rt boolean bDownOver = false; //Downing is over +<'uw boolean bStop = false; //Stop identical NFdJb\ FileAccessI fileAccessI = null; //File Access interface &z ./4X O4lxeiRgC )fxo)GS public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 1i5 vW- '4 { &Tf=~6 this.sURL = sURL; tfi2y]{A this.nStartPos = nStart; fGu5%T, this.nEndPos = nEnd; 6&i[g nThreadID = id; K~7'@\2
? fileAccessI = new FileAccessI(sName,nStartPos);//定位 Q.j-C}a } 3m-edpH uU8*$+ " PFImqojHd public void run() h-z%C6 { ZrmnQ while(nStartPos < nEndPos && !bStop) {%]NpFg#b { Ln"+nKr K?z*3^^X; u+%)JhIp try{ |usnY URL url = new URL(sURL); XS}Zq4H HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (Q}PeKM?jq httpConnection.setRequestProperty("User-Agent","NetFox"); H=JP3ID>{ String sProperty = "bytes="+nStartPos+"-"; ^ %~Et>C httpConnection.setRequestProperty("RANGE",sProperty); Da9* / Utility.log(sProperty); <wIp$F. 6LSPPMM F!z! :yp InputStream input = httpConnection.getInputStream(); 2jI4V;H8g //logResponseHead(httpConnection); !1ie:z>s d+gk q\ OGSEvfW byte[] b = new byte[1024]; UMHuIA:%U int nRead; m
_t(rn~f6 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) |_Naun=+~ { o'x_g^ Y nStartPos += fileAccessI.write(b,0,nRead); n r'YWW //if(nThreadID == 1) `~w%Jf // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); +^^S'mP8 } &* V0( Sa?~t3*H rwi2kk#@P Utility.log("Thread " + nThreadID + " is over!"); `^s]? bDownOver = true; LM'*OtpDG //nPos = fileAccessI.write (b,0,nRead); $5 q{vy } ?X8K$g catch(Exception e){e.printStackTrace ();} lB5[#z } % xH>0 } ,iA2si 73!
x@Duh 1CF7 //打印回应的头信息 44/0}v] public void logResponseHead(HttpURLConnection con) @&am!+z { aT`02X for(int i=1;;i++) |Oj,S|Z: { t<KEx^gb String header=con.getHeaderFieldKey(i); EkfGw/WDw if(header!=null) ^c;skV&S //responseHeaders.put(header,httpConnection.getHeaderField(header)); (HTk;vbZm Utility.log(header+" : "+con.getHeaderField(header)); h0y\,iWXb else PBPJ/puW break; #b]}cwd! } ;6\Ski0=l } e>)}_b >mGGJvTx `Tm8TZd66 public void splitterStop() zm_hLk { g,z&{pZch bStop = true; gZ79u } ~gzpX,{n ]aL [ #!<+:y'S? } %r}KvJgd V,"AG \fQgiX /* %n V@'3EI **FileAccess.java r* *//文件访问(定位,写) sDh6 Uk package NetFox; v J,xz*rc` import java.io.*; hQW#a]]V: $[^ KCNB iz,q8}/( public class FileAccessI implements Serializable{ `OF;>u*:
BZ'y}Zu*
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 #L+s%OJ` RandomAccessFile oSavedFile; !O%f)v? long nPos; P[J qJi/H +wf& L "_% 0|; public FileAccessI() throws IOException PauFuzPP { #L1yL<' this("",0); .q;RNCUt } XN 0RT>@ 802]M :ayO+fr# public FileAccessI(String sName,long nPos) throws IOException H 29 _ / { ?M1 QJ oSavedFile = new RandomAccessFile(sName,"rw"); YM,D`c[pX this.nPos = nPos; !Z9ikn4A oSavedFile.seek(nPos); fxf
GJNR } HWao3 Lz "> 4[+' kH(3 public synchronized int write(byte[] b,int nStart,int nLen) 94>7-d { ^Qb!k/$3y int n = -1; e\bF_
N2VA try{ qz_TcU' oSavedFile.write(b,nStart,nLen); Y;F,GxR} n = nLen; 56~da ){gd } CBgFB-!qpe catch(IOException e) khO<Z^wi[ { "N[gMp6U e.printStackTrace (); xBx?>nN } FL_ arhrqD <3]/ms b ffml return n; >Gu>T\jpe. } A<G ; V1+o3g{} EXM/>PG } eVbh$cIrZ ywa .cq eC1c`@C: /* EPUJa~4 **SiteInfoBean.java [7t0[U~3? */ <a/ZOuBzZ package NetFox; ;{)@ghD l#(g&x6J ~'YSVx& ) public class SiteInfoBean { I7-PF? w `9GygS t6U+a\-< private String sSiteURL; //Site's URL 98%a)s)(a private String sFilePath; //Saved File's Path :ftyNaq' private String sFileName; //Saved File's Name L[9+xK^g private int nSplitter; //Count of Splited Downloading File f>JzG,- 0i1?S6]d- XzR WY\x public SiteInfoBean() sC*E;7gT, {//nSplitter的缺省值为5 [}g5Z=l //default value of nSplitter is 5 .dq.F#2B; this("","","",5); 5<'Jd3N{& } "i5AAP?_]{ <P)%Ms orN2(:Ct7 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) FU3IK3} { #cg@Z sSiteURL= sURL; 7!d<>_oH sFilePath = sPath; U";Rp&\3; sFileName = sName; }lbx this.nSplitter = nSpiltter; o~z.7q Fu=VY{U4 i3\oy`GJ } G}OrpPP 6/[h24d mgl'
d public String getSSiteURL() 'k) P(H { 6Yi,%# return sSiteURL; l~>rpG } gA8u E *h8XbBZH fwGz00C/U public void setSSiteURL(String value) lu(Omds+ { +/^q"/f F sSiteURL = value; d=Ihl30m } PzG:M7 @!tmUme1c M)It(K8R public String getSFilePath() 2FtEt+A+' { +\@\,{Ujy return sFilePath; :=KGQ3V~eK } "PM:&v [+2^n7R ]5MRp7 public void setSFilePath(String value) fN/KXdAy& { O4+w2'., sFilePath = value; Ki6BPi^ }
6}ewBAq% k$mX81 [&59n,R` public String getSFileName() )"Yah { iw6M3g# return sFileName; +c2>j8e6 } 5_T>HHR6 W`rE\P -CNv=vj 3 public void setSFileName(String value) S 2` ;7 { 7
@Qlp$[F sFileName = value; Nr7.BDA } l`G:@}P>G -x5bdC(d ^hTJp{ public int getNSplitter() YXOD
fd%L {
B#lj8I^| return nSplitter; DD3yl\#, } Fgq*3t 8U$UI jWjK -q@Y public void setNSplitter(int nCount) }|,\?7, { KPK!'4,cu nSplitter = nCount; %=>xzP(z } U-:Z^+Y } YS6az0ie MA QY/s~F 2]KPW*V /* :D7!6}% **Utility.java DO*C] */ 0([jD25J! package NetFox; 9Ei#t FMc nmAXU!t' ^OsUWhkV public class Utility { M0\[hps~X BuO J0$ ^ @cX0_ public Utility() 9%veUvY { N>iCb:_
T; D($UbT-v *m/u 3.\ } PhdL@Mr 4&WzGnK //线程睡眠 _Xe< JJvq public static void sleep(int nSecond) ^W*)3;5 { %Q01EjRes try{ )W3l{T( Thread.sleep(nSecond); a];i4lt(c } vUExS Z^ catch(Exception e) O\{_)L { zL}DLfy>R e.printStackTrace (); uU"s50m } V,,iKr@TG } p{GDW_ ~UFsi VpL //日志 kKO]q#9sO public static void log(String sMsg) 09i[2n;O { 7guxkN# System.err.println(sMsg); Unk+@$E& } &?pAt30K: bm|8Jbsb& |]^! 4[!U public static void log(int sMsg) x$4'a~E { XAkl,Y System.err.println(sMsg); 3mpjSL } _3JTHf<+ } CKx}.<_ 6d6SP)|j zh#uwT1u /* )]Rr:i9n **TestMethod.java *GnO&&m'B */ >@W#@W*I@ package NetFox; KLB?GN?Pb ax }Xsk_ ]P5u:~U public class TestMethod { BGOI -hfY:W`Dz NyNu1V$ public TestMethod() bBL"F!. { ///xx/weblogic60b2_win.exe }3e+D try{ \6L=^q= SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); P40eK0e6 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); S d -+a SiteFileFetch fileFetch = new SiteFileFetch(bean); *8+YR fileFetch.start(); ru
Lcu] } }Qo8Xps catch(Exception e){e.printStackTrace ();} b?,y%D)' AG%aH=TKp C\K-- } =$J2 H|?`n
uiD P@ u%{ public static void main(String[] args) NmXTk+,L# { qlP=Y .H new TestMethod(); s:{%1 / } *a4eL [ } ;E_{Zji_e 点击下载更多相关资料
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