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/* 3U;1D2"AE **SiteFileFetch.java iN)af5)[^ */ $$4W}Ug3U package NetFox; fM^<+o@ import java.io.*; XU9'Rfp import java.net.*; <L&eh&4c
] .5OX84 %?=)!;[ public class SiteFileFetch extends Thread { hQ';{5IKvC (("OYj z_l. V/G) SiteInfoBean siteInfoBean = null; //文件信息Bean d)KF3oA long[] nStartPos; //开始位置 N`1r;%5 long[] nEndPos; //结束位置 l RND FileSplitterFetch[] fileSplitterFetch; //子线程对象 r/PKrw sC long nFileLength; //文件长度 !G+u j( boolean bFirst = true; //是否第一次取文件 aR)?a;}H boolean bStop = false; //停止标志 ik\S88| File tmpFile; //文件下载的临时信息 7>,rvW:] DataOutputStream output; //输出到文件的输出流 GYoseqZM .'lN4x //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 3dm'xetM public SiteFileFetch(SiteInfoBean bean) throws IOException Ef,Cd[]b { ~ 5"J( siteInfoBean = bean; [hHG. //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); /s`;9)G]9 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); %g w{[
/[A if(tmpFile.exists ()) 6?o>{e7n^ { 6mHhC? bFirst = false; asz?p\k:bC read_nPos(); }\Z5{OA } 2 ~-( A else w1i?#!| { )eR$:uO nStartPos = new long[bean.getNSplitter()]; x)R0F\_ nEndPos = new long[bean.getNSplitter()]; 3cThu43c } .Dx2 ;lj Le&;g4% T 2|:nC)@ J"&y|;G } oEIqA zs8I v<&v]!nF public void run() ";dU-\3M { e/94y6*> //获得文件长度 K7RKF$Z\ //分割文件 oAz<G //实例FileSplitterFetch x'i0KF //启动FileSplitterFetch线程 }n[Bq# //等待子线程返回 ,`
o+ ? try{ Jck"Ks if(bFirst) kl<g;3 { 4z0L ke nFileLength = getFileSize(); 2.qpt'p[ if(nFileLength == -1) >{XScxaB` { !Uy>eji} System.err.println("File Length is not known!"); >'Hx1; } |yv]Y/= else if(nFileLength == -2) /qXzOd { z2~87fv+ System.err.println("File is not access!"); 0;cuX@A/a? } bNs[O22 else %?dE{ir { e5OVq
, for(int i=0;i<nStartPos.length;i++) *"T+G*~ { |Puj7Ru nStartPos = (long)(i*(nFileLength/nStartPos.length)); 0jTMZ<&zZ } =|V"#3$f for(int i=0;i<nEndPos.length-1;i++) e &Rb { 4 J8Dh;a` nEndPos = nStartPos[i+1]; 4J}3,+ } !.eAOuq nEndPos[nEndPos.length-1] = nFileLength; "TFwHe3C4 } wY`#$)O0* }
V16%Ne 61,O%lV O6]u!NqG //启动子线程 PbN3;c3 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; {AgBwBCE for(int i=0;i<nStartPos.length;i++) ,qu:< { s41adw> fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]-Lruq# siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),
mn`5pha nStartPos,nEndPos,i); y5%5O xB Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m1y `v" fileSplitterFetch.start(); mATH*[Y } 5rN7':(H!% // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ?i%nMlcc siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); b9#m m // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", AY;<q$8j%, nEndPos = " + nFileLength); zq=&4afOE // fileSplitterFetch[nPos.length-1].start(); t=
*Jg/$ Hz? ,#>{ Tzf$*Uje3 //等待子线程结束 qK-qcPLsl //int count = 0; %omu //是否结束while循环 |D+p$^L boolean breakWhile = false; AysL-sqR R8ZD#,; D6:DrA: while(!bStop) )Y8qWJU { ?FDJqJM write_nPos(); c/RT0xql* Utility.sleep(500); eA&t% breakWhile = true; Gym#b{#": ZQ|gt* t%HI1eO7h for(int i=0;i<nStartPos.length;i++) z L8J`W { kyu2)L2u if(!fileSplitterFetch.bDownOver) !mae^A1 { B,MQ.|s[ breakWhile = false; q|Fjm]AF break; C (U } AoU_;B\b% } q#m!/wod if(breakWhile) J@gm@ jLc break; K4Y'B
o4 $E @ouX? 0<3E //count++; AHWh}~Yi //if(count>4) p9Z].5Pd" // siteStop(); BjB&[5?z } ,3k@L\$.x 0}D-KvjyP HoL~j( { System.err.println("文件下载结束!"); y:C)%cv}* } T;J7+0 catch(Exception e){e.printStackTrace ();} $)f"K } l-cW;b~ !YY6o
V 3l$E8?[Zwi //获得文件长度 C$t.C
rxx public long getFileSize() 9u?Eb~#$ { 3? }; int nFileLength = -1; X'xUwT|_+ try{ n_1jHJo URL url = new URL(siteInfoBean.getSSiteURL()); @wMQC\Z HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @Jm.HST#S8 httpConnection.setRequestProperty("User-Agent","NetFox"); L7<+LA)s0 _tA7=*@8 %6N)G!P int responseCode=httpConnection.getResponseCode(); S7Znz@ if(responseCode>=400) blUY.{NN3 { l\_x(BH processErrorCode(responseCode); m^'~&!ba return -2; //-2 represent access is error :q(D(mK } 5
>'66gZ ]I8]mUiUH NtqFnxm/ String sHeader; &jt02+Hj' 27Cz1[oX :Jm!=U%'Z for(int i=1;;i++) 3Fgz)*Gu] { ?P%|P //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); %n4@[fG%K //Utility.log(in.readLine()); &{BBxv)y sHeader=httpConnection.getHeaderFieldKey(i); ?THa5%8f if(sHeader!=null) >n1h^AW { We\KDU\n if(sHeader.equals("Content-Length")) #jOOsfH|k { 40R"^* nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader));
\|blRm; break; 28ja-1dB } gU~
L@R_D } >CH else "oHp.$+K break; '^e0Ud, } hI*`> 9l } QjI#Cs}w catch(IOException e){e.printStackTrace ();} b/z'`?[ catch(Exception e){e.printStackTrace ();} l},dQ4R ijE<spG Wux 0RF& Utility.log(nFileLength); lK "'nLL :,jPNuOA 9U&~(; return nFileLength; o1Ne+Jt } =[ s8q2V ix:2Z- 33*^($bE& //保存下载信息(文件指针位置) EN)YoVk private void write_nPos() mlD%d!. { $|rCrak; try{ qI(W$ output = new DataOutputStream(new FileOutputStream(tmpFile)); *+NGi(N output.writeInt(nStartPos.length); eR7qE) h for(int i=0;i<nStartPos.length;i++) AbL5 !' { m\_+)eI| // output.writeLong(nPos); L7X7Zt8% output.writeLong(fileSplitterFetch.nStartPos); 3(MoXA* output.writeLong(fileSplitterFetch.nEndPos); >ze>Xr'm5= } $K`_
K#A output.close(); 4A;[sm^f } Yd[U catch(IOException e){e.printStackTrace ();} 3(aRs?/O catch(Exception e){e.printStackTrace ();} u.$Ym } D% oueW ,<7"K& <_=JMA5 //读取保存的下载信息(文件指针位置) G}182"#4 private void read_nPos() KrJ 5"1= { #c6ui0E%;t try{ lq~GcM DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); B.V?s,U int nCount = input.readInt(); >s;oOo+5 nStartPos = new long[nCount]; izXbp02 nEndPos = new long[nCount]; Vp|2w lFE- for(int i=0;i<nStartPos.length;i++) JtSuD>H`" { r;c' NqP nStartPos = input.readLong(); W^^K0yn`@ nEndPos = input.readLong(); DxE(9j } ,?C|.5 input.close(); &/ \O2Aw8 } h1n*WQ- catch(IOException e){e.printStackTrace ();} &\JK%X.Jlt catch(Exception e){e.printStackTrace ();} /TzNdIv } %=laY_y
G 976E3u"Vt KX0<j private void processErrorCode(int nErrorCode) mk#>Dpy? { r3n=<l!Jr System.err.println("Error Code : " + nErrorCode); UAnB=L,.\ } fx]\)0n ~C%2t{" f+*J
ue //停止文件下载 7bctx_W&6 public void siteStop() QIR4<]/ { Su$18a"Bc bStop = true; _Ngx$ for(int i=0;i<nStartPos.length;i++) > .a+: fileSplitterFetch.splitterStop(); <ED8"~_ O]c=Yyl co
\[{}} } "2*G$\ } qXXYF>Z- //负责部分文件的抓取 CkmlqqUHC **FileSplitterFetch.java 1_N~1Ik */ JQ~y- lt package NetFox; OAmES;Ck$( m\<<oIlH l0qdk#v import java.io.*; pYYqGv^oa import java.net.*; AM>Yj ck(CA(_ <f7?PAd public class FileSplitterFetch extends Thread { <9Lv4`]GU5 bRx2
c
?| D$#{^ String sURL; //File URL \pjRv long nStartPos; //File Snippet Start Position hu bfK~ long nEndPos; //File Snippet End Position 9V|E1-")E int nThreadID; //Thread's ID 1~["{u boolean bDownOver = false; //Downing is over |
\ s2 boolean bStop = false; //Stop identical &p/S>qKu# FileAccessI fileAccessI = null; //File Access interface :iP>z}h |pfhrwJp M'pb8jf public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 2#>$%[ { ..vSL this.sURL = sURL; o?:;8]sr! this.nStartPos = nStart; ;X?Ah this.nEndPos = nEnd; `,F&y{A nThreadID = id; u5xU)l3 fileAccessI = new FileAccessI(sName,nStartPos);//定位 >wz;}9v } y#hga5 <_##YSGh, }"F
?H:\ public void run() 4yA9Ni { ?b!CV
while(nStartPos < nEndPos && !bStop) ti$oZ4PpF { N&6_8=3z b@nri5noBm 8@Egy%_ try{ jF%)Bhn( URL url = new URL(sURL); r
Iya\z1W HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /e-ka{WS httpConnection.setRequestProperty("User-Agent","NetFox");
zjluX\ String sProperty = "bytes="+nStartPos+"-"; Z!C`f/h9 httpConnection.setRequestProperty("RANGE",sProperty); $nUd\B$.= Utility.log(sProperty); 6{JR 0 "#mXsp-ut *u|lmALs InputStream input = httpConnection.getInputStream(); r;&]?9)W0 //logResponseHead(httpConnection); -mev%lV c!'A)JD@ Ze[g0" byte[] b = new byte[1024]; Y9IJ int nRead; C m,*bgX while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) "D
ts* { Wrf^O2 nStartPos += fileAccessI.write(b,0,nRead); _&k'j)rg //if(nThreadID == 1) 7Y-FUZ.`> // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); &+)+5z_d } p9FA_(`^ uE,i-g0$Id blKDQ~T2 Utility.log("Thread " + nThreadID + " is over!"); N0y;PVAGu bDownOver = true; J6@(X8w{j //nPos = fileAccessI.write (b,0,nRead); ^4xlZouCb } &&(4n?
catch(Exception e){e.printStackTrace ();} %Y)PH-z } 5 {T9* } EIq{C-( Ze$^UR SQO>}#qm //打印回应的头信息 Bi9
N public void logResponseHead(HttpURLConnection con) {
4_I7r { d-6sC@PB for(int i=1;;i++) 2ru*#Z#( { aGq_hP String header=con.getHeaderFieldKey(i); B)j`}7O06 if(header!=null) ]Ks]B2Osz //responseHeaders.put(header,httpConnection.getHeaderField(header)); B$} wF<`k7 Utility.log(header+" : "+con.getHeaderField(header)); 8!
|.H p else EmtDrx4!(f break; U~u6}s]: } dCf'\@<< } ZYwBw:y}y %5Q7 #xU i#pjv'C public void splitterStop() Mr5('9% { WL
IDw@fv bStop = true; bm|Jb"T0b } Nt`F0
9S Z/V`Z* fy UA69_E{JCH } )#b}qc#` mJ6t.%'d PTuCN /* N3XVT{yo **FileAccess.java S7?f5ux *//文件访问(定位,写) O+(. 29 package NetFox; p"hm.=, import java.io.*; ++J Bbuzj! .XV]<)<K$ ;X*K*q public class FileAccessI implements Serializable{ zumR( <l 'mBLf&fB //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 O Ey:#9<' RandomAccessFile oSavedFile; "xvV'&lQ long nPos; sUyCAKebRr 2-"Lxe65f 3oppV_^JdT public FileAccessI() throws IOException /ctaAQDUh\ { |? ;"B:0 this("",0); ohQz%?r } YO.`l~ v K%[}[.cW 1}n)J6m public FileAccessI(String sName,long nPos) throws IOException %T&&x2p^=? { uJ|5Ve oSavedFile = new RandomAccessFile(sName,"rw"); IEIxjek this.nPos = nPos; P\*2c*,W; oSavedFile.seek(nPos); W G3mQ\k } dN$D6* 3&a*] E5Snl#Gl\0 public synchronized int write(byte[] b,int nStart,int nLen) n3HCd-z { *hk{q/*Qw int n = -1; k2_6<v
Z try{ MQ9M%> oSavedFile.write(b,nStart,nLen); @mQ/WYs n = nLen; ?FY@fO?es } bOdsMlJkN catch(IOException e) 3IU$ { yO$r'9?,* e.printStackTrace (); VuO) } HonAK "EOk^1,y eSvc/ CU return n; 2kp|zX( } :uT
fhr T_(e(5 .=b
+O~ } #RLch Q8DQ .C %WJ{IXlz /* bY"eC i{K **SiteInfoBean.java Ol/2%UJXL */ AT8B!m package NetFox; xyz\;3 lvz:UWo 72s$ public class SiteInfoBean { %Zl_{Q]h % b>y X."h Tha5 private String sSiteURL; //Site's URL dp// p)B> private String sFilePath; //Saved File's Path psyH?&T private String sFileName; //Saved File's Name eHnei F private int nSplitter; //Count of Splited Downloading File ]mD=Br*r~ 8ZNd|\ e$/Zb`k public SiteInfoBean() qN`]*baS {//nSplitter的缺省值为5 x%:>Ol //default value of nSplitter is 5 !cFE^VM_; this("","","",5); tI!R5q;k } bb
O;AiHD soQv?4 !Lg}q!*%>V public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) w=P<4bdT { {6=H/g=:i sSiteURL= sURL; MeK\eZ\ sFilePath = sPath; 9/X v&<Tn sFileName = sName; fbx;-He! this.nSplitter = nSpiltter; +}G>M=t:: k. ?
T.9
&' Nk2{ } $CQwBsYb= EbwZZSds1 (PT?h>|St public String getSSiteURL() g6a3MJV` { c J"]yG)= return sSiteURL; d,Dg"Z } Z#cU#)`y1 7"CH\*% ~RR_[t2Z public void setSSiteURL(String value) EH!EyNNb { =VX<eV sSiteURL = value; @=zBF'<.9 } }~\].I6 ;uA_gn! B,VSFpPx public String getSFilePath() {;z
L[AgCg { h> 5~
(n8 return sFilePath; B|q3;P } !,(bXa\^ dXK~
Z: W%jX- public void setSFilePath(String value) 4Igs\x{i { 5Ret,~Vs9| sFilePath = value; RWh}?vs_ } W!Ct[t y3o4%K8 M3Z Jt' | public String getSFileName() ?=@Q12R)X { aab4c^Ms= return sFileName; :PjUl } G'}_ZUy# &LxzAL,3! /jL{JF>I public void setSFileName(String value) RVKaqJ0e< { ^%OH}Z `ly sFileName = value; K/.hJ } 7rDRu] PA-0FlV| g7Q*KA+ public int getNSplitter() *ej o6> { _ L:w;Oy9T return nSplitter; my\oC^/9 } Z FrXw+ +uGP(ONY d<cbp[3F public void setNSplitter(int nCount) fN%5D z-e { *1$~CC7 nSplitter = nCount; .L TFa.jxA } hpi_0lMkI } <n~g+ps !VZCM{ ZwrYss /* NwuBe:"@ **Utility.java xg5@;p */ au}0PnA; package NetFox; u$/2XO ib=^tK fF]&{b~wk public class Utility { Gt%?[ vFvu8*0 C%7)sLWjJS public Utility() OsSiBb,W79 { >`V|`Zi ? AkQFb2|ir iuk8c.TAR } mS;Q8Crh r_<i*l. //线程睡眠 \C\y'H5 public static void sleep(int nSecond) OuIW|gIu0 { cz~11j# try{ Ecl7=-y Thread.sleep(nSecond); iwTBE]J } BL^Hj catch(Exception e) l#f]KLv4N_ { 9d(v^T e.printStackTrace (); <EN[s } (2(;u1 } :;u]Y7 2<. /HH*f //日志 ;}9Ws6#XQs public static void log(String sMsg) ^p%+r B.j[ { jP6G.aiO System.err.println(sMsg); zyn =Xv@p } B-p5;h> K>JU/( hfa_M[#Q- public static void log(int sMsg) ' g!_Flk { NP`ll0s System.err.println(sMsg); en6AAr:U} } {ZI6!zh' } _Wsk3AP tJfN6 bD[W~ku /* h pes **TestMethod.java O.f3 (e! */ Bq=](<>> package NetFox; 4~MUc! NW
Qu-]P x(6.W"-S public class TestMethod { A/6nVn zQ^[=siZ} ]`U?<9~Ob public TestMethod() z#67rh{ { ///xx/weblogic60b2_win.exe 7uH{UpslJ try{ nE$ V<Co} SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); d"uM7PMs7x //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 05zdy-Fb SiteFileFetch fileFetch = new SiteFileFetch(bean); `.Q3s?1F fileFetch.start(); 0# GwhB } U.} =j'Us+ catch(Exception e){e.printStackTrace ();} yAkN2 ?^GsR[-x -+Ji~;b } 5.UgJ/ J, U~.c R.$Y1=U6 public static void main(String[] args) ^Iq.0E9_ { Nxk'!: new TestMethod(); .y/?~+N^ } j-\u_#kx% } 2_DtzY:= 点击下载更多相关资料
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