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/* .~/;v~bL **SiteFileFetch.java k@X
As */ CX@HG)l package NetFox; gcY~_'&u import java.io.*; Ffqn|}gb import java.net.*; sZ(Q4)r
/:];2P6#X 4iB)oR public class SiteFileFetch extends Thread { t3kh]2t Y K 62#; S}oF7;'Ga SiteInfoBean siteInfoBean = null; //文件信息Bean B=qRZA!DQ? long[] nStartPos; //开始位置 SX<>6vH& long[] nEndPos; //结束位置 zK]%qv] FileSplitterFetch[] fileSplitterFetch; //子线程对象 l=G#gKE long nFileLength; //文件长度 Pxuz { boolean bFirst = true; //是否第一次取文件 >5Rw~ boolean bStop = false; //停止标志 oZ>]8vw File tmpFile; //文件下载的临时信息 `rFGSq$9 DataOutputStream output; //输出到文件的输出流 `E%d$ 5|H(N}S_ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Le+8s LE`Y public SiteFileFetch(SiteInfoBean bean) throws IOException uaMm iR { C3
c|@7FU siteInfoBean = bean; K>E!W!-PJ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); L
~'N6 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); q+=@kXs>+ if(tmpFile.exists ()) _p^ "! { I;PO$T bFirst = false; {.[,ee-)9 read_nPos();
WN?`Od:y } PbC>v else |Szr=[ { `e:RZ nStartPos = new long[bean.getNSplitter()]; F973U nEndPos = new long[bean.getNSplitter()]; iK23`@&%_ } I>\?t4t Ho*RLVI0U (B4A$t N`:bvr } @Pg@ltUd ]fmf X "!eT public void run() ~ZIRCTQ" { jtJ8r5j 1 //获得文件长度 Q>Q}/{8! //分割文件 = nN*9HRD //实例FileSplitterFetch *y$r y] //启动FileSplitterFetch线程 0p2O8>w^% //等待子线程返回 Jm^jz try{ tAn6pGp if(bFirst) DccsVR`7 { Oc=PJf%D# nFileLength = getFileSize();
K8we* if(nFileLength == -1) \d`Sz
* { ?Gu>!7 System.err.println("File Length is not known!"); y6yseR! } r\D8_S_ else if(nFileLength == -2) T`G"2|ISS { S}I=i>QB System.err.println("File is not access!"); JQ4>S<ttJ } Z*B(L@H else vG} oo { |a\TUzq for(int i=0;i<nStartPos.length;i++) SZ){1Hu { \5_^P{p7< nStartPos = (long)(i*(nFileLength/nStartPos.length)); ,_-*/- 7;8 } (ytkq( for(int i=0;i<nEndPos.length-1;i++) N#ObxOE6T" { |`/uS;O nEndPos = nStartPos[i+1]; qa?y lR"kA } U$Z}<8 nEndPos[nEndPos.length-1] = nFileLength; ,6L>f.V^(U } fe/6JV
} G-<~I#k 3S?+G)qKo {P+[CO //启动子线程 (o\~2e: fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; u{z{3fW_ for(int i=0;i<nStartPos.length;i++) %q^]./3p { EC/R|\d?Un fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3!W&J siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), DVH><3FF nStartPos,nEndPos,i); }5Uf`pM8 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); mAa]Et. fileSplitterFetch.start(); EUqG"h5#A{ } bS<p dOX_ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]42l:at siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); E(#2/E6 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", .IU+4ENSy4 nEndPos = " + nFileLength); RJD3o_("K // fileSplitterFetch[nPos.length-1].start(); D$;/
l}s? >d\I*"C+d VCO/s9AL //等待子线程结束 DAi[3`C //int count = 0; rJ>8|K[kt //是否结束while循环 {'(8<n57 boolean breakWhile = false; jEI L(0_H 5$X{{j2 t,_[nu(~8% while(!bStop) EK_^#b { rg\w!L( write_nPos(); P9vROzXK Utility.sleep(500); cALs;)z breakWhile = true; )3 +L6d$+ DP_ \%(A for(int i=0;i<nStartPos.length;i++) da@
.J9 { ! ZEKvW if(!fileSplitterFetch.bDownOver) 6s;x@g] { <*P1Sd. breakWhile = false; &PX'=UT break; hkG<I';M?M } ??PpHBJ') } MZ'HMYed if(breakWhile) ~WSC6Bh@9 break; G)Y!aX KMV!Hqkk 4~4Hst#^ //count++; *6L^A`_1] //if(count>4) UpILr\3U // siteStop(); _ sd?l } K4"as9oFP SW7%SX,xM V|=
1<v System.err.println("文件下载结束!"); 0U'r ia:$ } UWHC]V? catch(Exception e){e.printStackTrace ();} s6I]H } ]+AI: tyh%s" 15COwc*k //获得文件长度 e(Verd:c public long getFileSize() ?k#%AM { PA E)3 int nFileLength = -1; \xt!b^d0 try{ yAOC<d9 E URL url = new URL(siteInfoBean.getSSiteURL()); (w*$~p HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ]#nAld1cmy httpConnection.setRequestProperty("User-Agent","NetFox"); (<12&=WxE a
<3oyY' p:
o*= int responseCode=httpConnection.getResponseCode(); 04s N4C if(responseCode>=400) vI-KH:r"{ { T*oH tpFj# processErrorCode(responseCode); ~'ovJ46tx return -2; //-2 represent access is error *jYwcW"R{z } bnlL-]]9z o}T]f(>} 0t) IWD String sHeader; 7cC$) ;RU)Q)a) Z5\6ca for(int i=1;;i++) _u>+H# { L2 I/h`n" //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); A#T;Gi //Utility.log(in.readLine()); \ .:CL?m# sHeader=httpConnection.getHeaderFieldKey(i); q+K`+& @\ if(sHeader!=null) !%Ak15o { :A[ Gtc(_ if(sHeader.equals("Content-Length")) $1axZ~8sS { w(vf>L6( nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); .N%$I6w break; IcA]<}0!"v } TqWvHZX } c6e?)(V> else 9U+^8,5 break; C. Sb4i* } V@$B>HeK } b&LhydaJ catch(IOException e){e.printStackTrace ();} 1Ao"DxZHy7 catch(Exception e){e.printStackTrace ();} f`?|A
* 6uiOtH &B))3WFy Utility.log(nFileLength); tvd/Y|bV= 6ds&n#n $hA[vi\5 return nFileLength; +ux,cx.U" } a+]@$8+ vZ*593C8 b+{yF //保存下载信息(文件指针位置) >:Rc%ILym private void write_nPos() %cBJ haR{( { 6CCM7 try{ J&lQ,T!?B output = new DataOutputStream(new FileOutputStream(tmpFile)); {~Phc 2z output.writeInt(nStartPos.length); f9;M"Pd for(int i=0;i<nStartPos.length;i++) `TAhW { CA{c-kG // output.writeLong(nPos); dD#A.C,Rz output.writeLong(fileSplitterFetch.nStartPos); _m;Y' output.writeLong(fileSplitterFetch.nEndPos); J.~$^-&! } [^aow-4z output.close(); KpSHf9!&[ } %h3CQk catch(IOException e){e.printStackTrace ();} \vKMNk;kz catch(Exception e){e.printStackTrace ();} tM~R?9OaJ } 1XwbsKQ} 75gE>:f ~Q5L)}8N //读取保存的下载信息(文件指针位置) z~Gi/Ln private void read_nPos() ,LG6py&aT { K
o,O!T. try{ IEHAPt' DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); @ 3FTf"#Y int nCount = input.readInt(); c}lUP(Ss nStartPos = new long[nCount]; h%pgdix nEndPos = new long[nCount]; EZao\,t for(int i=0;i<nStartPos.length;i++) ?PLf+S { S$ dFz nStartPos = input.readLong(); ShFSBD\M# nEndPos = input.readLong(); gTm[ <Y } G,%R`Xns input.close(); v-EcJj% } ?~hC.5 catch(IOException e){e.printStackTrace ();} a//<S?d$: catch(Exception e){e.printStackTrace ();} j$siCsF } ,{=# F:1w%#6av 89@gYA"Su private void processErrorCode(int nErrorCode) o{lR_ { d A[I System.err.println("Error Code : " + nErrorCode); `VwZDU~6 } {IJ,y27 ):31!IC 5_9mA4gs@ //停止文件下载 FTsvPLIv" public void siteStop() Rra<MOR { 0ERA(=w5 bStop = true; jIaAx_ for(int i=0;i<nStartPos.length;i++) 1!~=8FTv fileSplitterFetch.splitterStop(); +QGZ2_vW Gk
g)\ 3 fczId" } M3!A?!BU } jTH,GF //负责部分文件的抓取 uzr(gFd **FileSplitterFetch.java Vf:/Kokq */ 0[/>>
!ws package NetFox; <k+dJ=f \]1qAFB5 2x<,R/} import java.io.*; w3WBgH import java.net.*; qwM71B!r a<*q+a(*W xp7`[. public class FileSplitterFetch extends Thread { i=jwk_y dZK/v ?S9? ?y/ String sURL; //File URL wc`UcGO long nStartPos; //File Snippet Start Position [|.IXdJ! long nEndPos; //File Snippet End Position ?Dm={S6 int nThreadID; //Thread's ID P|*c7+q boolean bDownOver = false; //Downing is over '_oWpzpe boolean bStop = false; //Stop identical f9ux+XQk9 FileAccessI fileAccessI = null; //File Access interface @)k/t>r( Mtq\xF,/+ W<|
M0S{ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ?gD^K,A Hd { tqbYrF) this.sURL = sURL; >%LZ|*U this.nStartPos = nStart; "%]<Co<S this.nEndPos = nEnd; wr>[Eo@%\ nThreadID = id; n<q1itjD fileAccessI = new FileAccessI(sName,nStartPos);//定位 W cOyOv } 0])D)%B
k _[F (8Qx" o_ng{SL public void run() ISa}Km>Q { ,^wjtA3j8 while(nStartPos < nEndPos && !bStop) :`Kv\w. { lEAf\T7 5?l8;xe`{f JX!z,X?r4 try{ 'aV])(Wm> URL url = new URL(sURL); vo(riHH HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); a=_+8RyVQ httpConnection.setRequestProperty("User-Agent","NetFox"); ;Qn)~b~ String sProperty = "bytes="+nStartPos+"-"; N$ oQK( httpConnection.setRequestProperty("RANGE",sProperty); uvG'Kx Utility.log(sProperty); UA4="/ nMM:Tr *? V boyU InputStream input = httpConnection.getInputStream(); @=<B8VPJd //logResponseHead(httpConnection); h4ozwVA P*6h$T >:J7u*>$ ' byte[] b = new byte[1024]; L`3;9rO int nRead; M:M"7>: while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) DyPHQ}G { QJ\+u nStartPos += fileAccessI.write(b,0,nRead); '2z1$zst,# //if(nThreadID == 1) t7-6A // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;IOM3'5T@ } F,8 ?du] &M>o Nn#;Kjul. Utility.log("Thread " + nThreadID + " is over!"); x?7z15\ bDownOver = true; $;pHv< //nPos = fileAccessI.write (b,0,nRead); 1'B& e) } ZS<`.L6B3 catch(Exception e){e.printStackTrace ();} SPT?Tt } tdsfCvF=a } QQ,V35Vp[ xs6kr ^ItL_4 //打印回应的头信息 x,NV{uG$n public void logResponseHead(HttpURLConnection con) V]Rt[l] { vw6>eT for(int i=1;;i++) mY[*(a { g4 3(N!@g String header=con.getHeaderFieldKey(i); W m&* if(header!=null) '=0l{hv@ //responseHeaders.put(header,httpConnection.getHeaderField(header)); + )n}n5 Utility.log(header+" : "+con.getHeaderField(header)); ZaYUf else 5?Ukf$)x break; _lDNYpv } p\P) } /_X`i[ 7,s5Gd- ]D&U}n public void splitterStop() _+j#.o> { Cg(&WJw(ep bStop = true; Zts1BWL[ } M._;3_)%/ LJ6L#es2 .}5qi;CA } AJ3%Z$JJ;s ;F_P<b 2 w^9< I] /* ^ (s(4| **FileAccess.java D\Y,2!I *//文件访问(定位,写) _pmo
6O package NetFox; "G^TA:O:= import java.io.*; GYg.B<Q. +z[+kir f@gvDo]Y public class FileAccessI implements Serializable{ (_]!}N CpB,L //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 -u7NBtgUh RandomAccessFile oSavedFile; z%1e>`\E long nPos; l3*GQ~m7 PCHKH $o0.oY#
public FileAccessI() throws IOException !"o\H(siT { UM`{V5NG# this("",0); M.xZU\'ty } R58NTPm dVk(R9 8 d"@ /{O^1 public FileAccessI(String sName,long nPos) throws IOException ExQ\qp3 { QT5pn5+ z oSavedFile = new RandomAccessFile(sName,"rw"); =av0a! this.nPos = nPos;
2;j<{' oSavedFile.seek(nPos); `*elzW } Mna
yiJl 9^9-\DG &4+|{Zx0 public synchronized int write(byte[] b,int nStart,int nLen) {bADMj1 { ZJenwo int n = -1; Aix6O=K6 try{ `qYiic% oSavedFile.write(b,nStart,nLen); g$jT P#%b n = nLen; &AOGg\ } '6})L catch(IOException e) 8{QCW{K { k s\q^ten e.printStackTrace (); E#_2t)20 } h_{f_GQ" Q"B8l[ Kc95yt return n; \|9B:y'y } @0s'
(
iCA-X\E `^,E4Q y } h]L.6G|hEN $,J}w%A 0O,;[l /* C0KFN **SiteInfoBean.java oe.Jm#?2. */ U65l o[ package NetFox; deArH5&! uS,?oS Z$g'h1,zW public class SiteInfoBean { /&Cq-W )DhE~ \Cu=Le^ private String sSiteURL; //Site's URL xEurkR private String sFilePath; //Saved File's Path QNINn>2 private String sFileName; //Saved File's Name #O!2 private int nSplitter; //Count of Splited Downloading File Z{BK@Q4z M9A1
8d| g-wE(L public SiteInfoBean() .%{B=_7 {//nSplitter的缺省值为5 S*=^I2; //default value of nSplitter is 5 OblHN* this("","","",5); R[v0T/ } ULxQyY;32 \XmplG: /KWdIP# public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) krFp q; { p<H_]|7$7U sSiteURL= sURL; s|H7;.3gp sFilePath = sPath; :0Jn`Ds4o sFileName = sName; s`H|o'0 this.nSplitter = nSpiltter; L=qhb;[L l"E{ ?4 s7sd(f]= } lAM)X&}0 HBR/" m BHAFO E public String getSSiteURL() 8tR6.09' { y>0 @. return sSiteURL; @}H'2V } `Wjq$* ;"Qq/knVL QxLrpM"O public void setSSiteURL(String value) eA2*}"W { Uz,P^\8^$ sSiteURL = value; $peL1'Evo } F/lL1nTdK TM{m:I:Z*n *~6]IWN` public String getSFilePath() SaF0JPm4z { hz;SDaBA return sFilePath; ~FYC'd } !p+rU?
hs;|,r [ _xOz4`% public void setSFilePath(String value) #UymD-yII { hlV(jz sFilePath = value; |tI{MztJ"c } k7*-v/*S 6zU0 8z0- ;:[P/eg public String getSFileName() 2BO H8Mp9 { 8q9^ return sFileName; _?{KTgJ G } 8i`T?KB @]X!#&2>
!vl1#@ public void setSFileName(String value) 1iR\M4?Frf { aMydeTCHi sFileName = value; u SZfim@Z7 } AX@bM N/{=j jK6dI
7h public int getNSplitter() 6@^
?dQ { +gndW return nSplitter; nSo.,72 } e'npa*.e DPnrzV) u5qaLHoEP public void setNSplitter(int nCount) ZyC[w7$I2 { K~UT@,CS60 nSplitter = nCount; ^|rzqXW } uh)f/)6 } <Vyl*a{% YL;*%XmAG TffeCaBv /* {|zQ
.sA **Utility.java * e,8o2C$ */ 9ys[xOh
WM package NetFox; 2+(SR.oGq [F *hjGLc} K^AIqL8 public class Utility { q4/P'.S Tt0]G_ r)qow.+& public Utility() MGKSaP;x { 'OYnLz`"6 bq5?fPBrq v'y<}U } Q?m= a0g pi*?fUg!W //线程睡眠 :(jovse\ public static void sleep(int nSecond) jvE&%|Ngw { Dm;aTe try{ =p!Hl# Thread.sleep(nSecond); `@ Ont+ } F,GG>(6c catch(Exception e) y7 W7270) {
)Oj%3 e.printStackTrace (); *zPz)3; } N*hx;k9 } j =b-Y P<xCg //日志 7LW%:0 public static void log(String sMsg) %Zu+=IZ { 'F8:|g System.err.println(sMsg); za4:Jdr } DVyxe} AUkePp78 _
<pO<S public static void log(int sMsg) {D 8[pG%z {
A,|lDsvM System.err.println(sMsg); ?[Qxq34 } M}F)
P&Y } Nf{tC9l 5l(NX _/[(&}M /* }W R?n **TestMethod.java >9]i#So^ */ ulnlRx package NetFox; !Ry4w|w 'St\$X
.3T#:Hl public class TestMethod { ?`D/#P 'd
6z^Z6 7j L.\O public TestMethod() Bso3Z ^X. { ///xx/weblogic60b2_win.exe zINziAp{ try{ MXU8QVSY" SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); V2|XcR //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); '&$xLZ8 SiteFileFetch fileFetch = new SiteFileFetch(bean); }xM >F% fileFetch.start(); >)PcK } 6o/!H catch(Exception e){e.printStackTrace ();} y\"Kur*O H-.8{8 d$` NApr } N-Nq* (>\w8] n XOJ public static void main(String[] args) ^8yhx-mgb { Os-sYaW new TestMethod(); YAf`Fnmw } XZFM|=%X } /Z*XKIU6v/ 点击下载更多相关资料
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