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/* RDGefxv **SiteFileFetch.java g$+ $@~ */ j6}/pe*;;T package NetFox; O!xul$9 import java.io.*; N;gI %6 import java.net.*; ?>
)(;Ir9 u)J&3Ah% P3Ocfpf Bp public class SiteFileFetch extends Thread { ^26vP7 6_}&
WjU' 4Cm+xAXG SiteInfoBean siteInfoBean = null; //文件信息Bean Vh=10Et long[] nStartPos; //开始位置 cc37(=oKL long[] nEndPos; //结束位置 {-a8^IK, FileSplitterFetch[] fileSplitterFetch; //子线程对象 ;XAj/6pm long nFileLength; //文件长度 20h+^R3{Z boolean bFirst = true; //是否第一次取文件 II; boolean bStop = false; //停止标志 <l>o6K File tmpFile; //文件下载的临时信息 ?9W2wqN>o DataOutputStream output; //输出到文件的输出流 J7a_a>Y rW),xfo0 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) oQ
YmywY public SiteFileFetch(SiteInfoBean bean) throws IOException `0)'&HbLY { |%\>+/j$ siteInfoBean = bean; /fh[_!qN //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 'wA4}f tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); @
(4$<>< if(tmpFile.exists ()) }*Z *wC { uPh/u! bFirst = false; 3FetyWl' read_nPos(); xWR<>Og. } A-S!Z2m\ else ):<9j"Z;At { 'TwvkU" nStartPos = new long[bean.getNSplitter()]; \+,%RN. nEndPos = new long[bean.getNSplitter()]; |
6/ # H* } }:SWgPfc (58}G2}q $<DcbJW $Jc>B#1 } h=*eOxR"4^ ^&8FwV] >tGl7Ov public void run() &-R(u}m-F { mqrV:3} //获得文件长度
LeEv'] //分割文件 ;Gnk8lIsb //实例FileSplitterFetch NLnfCY-h //启动FileSplitterFetch线程 ^t0Yh%V7 //等待子线程返回 lE|Hp try{ >n(Ga9E if(bFirst) xQU$E|I { lD+f{GR nFileLength = getFileSize(); ,2>nr goM if(nFileLength == -1)
Fm-D>PR { p#A{.6Pa: System.err.println("File Length is not known!"); OUM^u* } MqKf'6z else if(nFileLength == -2) D2N<a= # { N Ftmus System.err.println("File is not access!"); T#OrsJdu } <4Ev3z*;Z else `514HgR { OK8|w]-A for(int i=0;i<nStartPos.length;i++) _ -6IB> { (Vz\02,K nStartPos = (long)(i*(nFileLength/nStartPos.length)); Thc"QIk&4 } !TwH;#U w for(int i=0;i<nEndPos.length-1;i++) xQKRUHDc { -mfd ngp3 nEndPos = nStartPos[i+1]; f?Am) } -5X*y4# nEndPos[nEndPos.length-1] = nFileLength; a]]>(Txc } myq:~^L
; } _]aA58,j AhA4IOG`. .).}ffhOL //启动子线程 ,'}qLor fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; N0mP
EF2 for(int i=0;i<nStartPos.length;i++) #0uD&95< { $-*E fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), "o{o9.w siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), yH<a;@C nStartPos,nEndPos,i); qvH RP@ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Bj1{=Pvl fileSplitterFetch.start(); Or:a\qQ1 } KB@F^&L { // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), S!oG|%VuB# siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); \""sf{S9 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", :i};]pR nEndPos = " + nFileLength); 8`]1Nt!*B // fileSplitterFetch[nPos.length-1].start(); ~E^lKe Gm1[PAj y/9aI/O' //等待子线程结束 {3H)c^Q //int count = 0; D-KQRe2@ //是否结束while循环 Et0[HotO boolean breakWhile = false; 7SVqfWp q-<t'uhs[ #]vs*Sz while(!bStop) Ex`!C]sQ { ]>_Ie?L)< write_nPos(); v<u`wnt Utility.sleep(500); |,)=-21&; breakWhile = true; 9V/:1I0?&0 ^hy Y,X k.@OFkX. for(int i=0;i<nStartPos.length;i++) {9_}i#,vR { K.l7yBm if(!fileSplitterFetch.bDownOver) 552yzn1 { }]B H
" breakWhile = false; +r<d z break; I}hY @ } V;-$k@$b. } 9\J6G8b>|I if(breakWhile) kKlcK_b; break; *=
;M',nx _X/`7!f 7FBaN7l //count++; r0'6\MS13 //if(count>4) HQ0fY // siteStop(); 2Y-NxW^] } d) i64" }bA@QEJ jwQ(E System.err.println("文件下载结束!"); sc)}r_|g } GB&^<@ catch(Exception e){e.printStackTrace ();} B{6wf)[O } yd+.hg&J +[_mSt PgMU|O7To //获得文件长度 sCrOdJ6| public long getFileSize() yzH[~O7 { D.;iz>_}Y int nFileLength = -1; RASPOc/] try{ \.l8]LH URL url = new URL(siteInfoBean.getSSiteURL()); ?BA~$|lfxu HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @)<
3Z httpConnection.setRequestProperty("User-Agent","NetFox"); qW" JIH6! u301xc,N<z int responseCode=httpConnection.getResponseCode(); fFiFS\''V if(responseCode>=400) ='z4bU { Yb?L:,a(I processErrorCode(responseCode); zho$g9* return -2; //-2 represent access is error ,)beK*Iw } 8?z7!k] Eb.k:8?Tn @;1Ym\zc String sHeader; gAxf5A_x) u+_6V 6aq=h`Y for(int i=1;;i++) [,?5}'we { XtP5IN\S //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); E,wOWs* //Utility.log(in.readLine()); ?#]wxH, sHeader=httpConnection.getHeaderFieldKey(i); ?VRf5 Cr- if(sHeader!=null) M:/)|fk { L[rxs[7~ if(sHeader.equals("Content-Length")) tH^]`6"QUa { i[7<l&K] nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 2M$^|j:[ break; n=1_- ) } 8{)j"rghah } l1#F1q`^t else }T1.~E break; FA7q
pc } ~[ZRE @ } 3<A$lG catch(IOException e){e.printStackTrace ();}
qC4Q+"' catch(Exception e){e.printStackTrace ();} `-)Hot) 1n-+IR" FofeQ Utility.log(nFileLength); H:5- S d,+a}eTP' Q xm:5P return nFileLength; )0UXTyw^ } ~M Mv+d88 AR?1_]"= L<H zPg //保存下载信息(文件指针位置) LAjreC<W private void write_nPos() RIV
+ _}R { n5s2\( try{ 6*r#m%| output = new DataOutputStream(new FileOutputStream(tmpFile)); Zog&:]P'F output.writeInt(nStartPos.length); fMluVND for(int i=0;i<nStartPos.length;i++) `2l
j{N { 3D^!U}E // output.writeLong(nPos); mnm7{?#[ output.writeLong(fileSplitterFetch.nStartPos); IDn$w^" output.writeLong(fileSplitterFetch.nEndPos); +JlPQ~5 } SDHJX8Hq output.close(); dW#T1mB } 5h7M3s catch(IOException e){e.printStackTrace ();} ,We'AR3X catch(Exception e){e.printStackTrace ();} -.t/c}a# } ]X\p\n'@j 'MK"*W8QRM ?&_u$Nn //读取保存的下载信息(文件指针位置) sp8P[W1a private void read_nPos() eFXQ~~gOj { S!6 ? b5 try{ 9?38/2kX4 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); :c}"a(| int nCount = input.readInt(); u6MHdCJ0y nStartPos = new long[nCount]; ]9hXiY nEndPos = new long[nCount]; GJj} |+| for(int i=0;i<nStartPos.length;i++) k\<8h% { :/XWk
% nStartPos = input.readLong(); N;mJHr3[F nEndPos = input.readLong(); 5v_vv'~ } 0i4XS*vPv input.close(); o~`KOe } yBkcYHT catch(IOException e){e.printStackTrace ();} 6R'z3[K9 catch(Exception e){e.printStackTrace ();} kkU#0p? 7 } kA4bv} 1Rd2Xb tYUg%2G private void processErrorCode(int nErrorCode) ./@C { YS0^!7u System.err.println("Error Code : " + nErrorCode); U>0~ /o
} Nf!WqD* je VxW>XxG0 8{DW$ZtR //停止文件下载 Ge^(Ag}vE public void siteStop() %pj T?G7 { 8z)J rO} bStop = true; K)N'~jCG for(int i=0;i<nStartPos.length;i++) 9(pF!}1%\ fileSplitterFetch.splitterStop(); }P\ J?8 kHz?vVE/l rk8Cea } Dj9ecV` } EV[ BB;eb //负责部分文件的抓取 %v)+]Ds{ **FileSplitterFetch.java {&uN q^Ch */ Vu5Djx' package NetFox; F#KUu3;B WGA"e Nz;f| 2h import java.io.*; #&,~5 import java.net.*; [pX cKN w:h([q4X ,u S)N6'b6 public class FileSplitterFetch extends Thread { THy{r_dx 3DOc,}nI~@ e !N% String sURL; //File URL Y,M2D long nStartPos; //File Snippet Start Position b NR@d'U long nEndPos; //File Snippet End Position _jM+;=f int nThreadID; //Thread's ID /RemLJP
F boolean bDownOver = false; //Downing is over ^KUM4.
6 boolean bStop = false; //Stop identical &Pe[kCO]
FileAccessI fileAccessI = null; //File Access interface R/P9 =yvg0 auHP^O>4L 0w!:YB ,} public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException *0/%R{+S { YJB/*SV^ this.sURL = sURL; /[+qw%> this.nStartPos = nStart; =|V [^#V this.nEndPos = nEnd; vRMGNz_P7[ nThreadID = id; 4vyJ<b
fileAccessI = new FileAccessI(sName,nStartPos);//定位 )^7- qy } _#y=T20'3 <,</ Ge 0)Q*u public void run() qk=OodEMK { ;nw}x4Y[ while(nStartPos < nEndPos && !bStop) H,Yrk(O- { WQBpU?O tvOyT6 ] %`0*KMO3
try{ $g '4' URL url = new URL(sURL); [/Xc},HbMe HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ZN}U^9m= httpConnection.setRequestProperty("User-Agent","NetFox"); bo[[<j!"I String sProperty = "bytes="+nStartPos+"-"; qdxDR
2]U httpConnection.setRequestProperty("RANGE",sProperty); L8?;A9pc() Utility.log(sProperty); plgiQr # 7VW/v4n IPk"{T3 InputStream input = httpConnection.getInputStream(); C
j: //logResponseHead(httpConnection); 'tY y_ C^ZDUj` &uXu$)IZ byte[] b = new byte[1024]; N4w&g- int nRead; Dpkc9~z while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) g-<[* nF { 5@EX,$h nStartPos += fileAccessI.write(b,0,nRead); wpa^]l //if(nThreadID == 1) VWW(=j // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
u"-."_ } ,B$e'KQ 1i}p?sU pykRi#[UrX Utility.log("Thread " + nThreadID + " is over!"); nmoC(| r bDownOver = true; t'* 2)U //nPos = fileAccessI.write (b,0,nRead); /_i]bM7W } $!K,5^+ catch(Exception e){e.printStackTrace ();} k(dNHT } $j&2bO5M } Oee>d< @!::_E+F] !Q{~f;L //打印回应的头信息 Nrzg>WQa public void logResponseHead(HttpURLConnection con) e!P]$em|1E { \4n9m for(int i=1;;i++) lFD/hz7lc { [cT7Iqip
String header=con.getHeaderFieldKey(i); LEA^o"NW. if(header!=null) Y*YV/E. //responseHeaders.put(header,httpConnection.getHeaderField(header)); Z[9f8/6<b Utility.log(header+" : "+con.getHeaderField(header)); seA=7c5E else /OeOL3Y break; tx]!|x" F } M[6WcH0/T } ]?V2L`/ PjkjUP cWp5pGIzfp public void splitterStop() =z9FjK { 1G
63eH)! bStop = true; %$=}ePD } m-'+)lB 02q*z>:^ 3`{[T17 } cLm{gd4 W 0b+End#mp J>^KQ /* e@L?jBj8m **FileAccess.java %J:2y *//文件访问(定位,写) 4H hQzVM{ package NetFox; I=|}%WO# import java.io.*; H#B97IGT P|;=dX#- g42f*~l public class FileAccessI implements Serializable{ 6Lz:J:Q) 3/*<i //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 &I?d(Z=:\ RandomAccessFile oSavedFile; kRB2J3Nt. long nPos; %-3wR@ y5N,~@$r kXW$[R public FileAccessI() throws IOException }bYk#6KX { 5Cl;h^R|m this("",0); c'Zs2s7$ } wsAijHjJI! 9P# <T7 $GX9-^og=T public FileAccessI(String sName,long nPos) throws IOException B2)SNhF2Y { ?#VkzT oSavedFile = new RandomAccessFile(sName,"rw"); tkf^sGgNO this.nPos = nPos; *Zz hN]1 oSavedFile.seek(nPos); LAv!s/ O$= } Awlw6?
5db9C}0 S3&lkN5 public synchronized int write(byte[] b,int nStart,int nLen) Tw!_=zy(Gw { *!L
it:H int n = -1; Schvwlm~i try{ 7=pJ)4;ZA oSavedFile.write(b,nStart,nLen); kT4Oal+4 n = nLen; a'YK1QX } |v= */e catch(IOException e) YE1X*'4 { Uf<IXx&; e.printStackTrace (); <jtu/U]78| } I2*\J)|f Ui05o7xg~p QxeK-x^ return n; .{66q#. } H]&^>Pvh ZR@PqS+O/ N.|uPq$R } ZqJyuTPv hV[= _sC
kBDl- /* "oo
j; **SiteInfoBean.java
5)<}a&;{ */ {%XDr,myd package NetFox; j$}W%ibj HbQ+:B] #~:@H&f790 public class SiteInfoBean { o :_'R5 `Y.Q{5Y ~"i4"Op& private String sSiteURL; //Site's URL cA25FD private String sFilePath; //Saved File's Path LV$`bZ private String sFileName; //Saved File's Name !&@!:=X, private int nSplitter; //Count of Splited Downloading File 4%,E;fB?= ~+bS D<!b P |kfPohI= public SiteInfoBean() nZ~J&QK- {//nSplitter的缺省值为5 >e9xM Gv //default value of nSplitter is 5 gukKa this("","","",5); 4: S- } 3NxwQ,~ +G[N
lb Nm, 9xq public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 88 M$mjx { Yb Dz{m sSiteURL= sURL; Zh3hCxXa sFilePath = sPath; }pL#C sFileName = sName; a^.5cJ$] this.nSplitter = nSpiltter; ad'C&^o5 TaE&8;H#N ~t.M!vk } 7&{[Y^R]" i9quP"<9 J#jx)K! public String getSSiteURL() &/tGT3) { E>3(ff& return sSiteURL; }
2P,Z 6L } 2]/[ !i*bb~ P xiJ R[a public void setSSiteURL(String value) <t)D`nY\ { Fun+L@:; sSiteURL = value; kSH|+K\M4 } !(-S?*64l sU 5/c|& >(39K public String getSFilePath() j SX VLyz { y%=t((.Z return sFilePath; Cz]NSG 5 } WwYy[3U 9#ZR0t.cY cuW&X9\m, public void setSFilePath(String value) P*zOt]T { X!ad~bt sFilePath = value; 92)e/t iP } kqyPb$Wy tv8}O([ mu#
a public String getSFileName() (_$'e%G0 { E4dN,^_ F! return sFileName; '+*{u]\ } FCMV1, +4*jO5EZ :{ Q[kYj public void setSFileName(String value) ";$rcg"%X { qZ|>{^a* sFileName = value; MW$
X4<*KD } ( zL( }[m,HA<j tNbZ{=I> public int getNSplitter() v6q oH)n { 'k?*?XxG return nSplitter; o9#8q_D9 } u AmDXqJ3 BT8L 'qEj >V1v.JH public void setNSplitter(int nCount) Y6r<+#V { x=~$ik++ nSplitter = nCount; X23#y7: } -VVJf5/ } CBvvvgI o N% W298 Uc<j{U
, /* XAF*jevr **Utility.java qH1&tW$ */ 0.}WZAYy~ package NetFox; ygn]f*;?kw QKt[Kte EvQMt0[?EW public class Utility { Nn]|#lLP <W<>=vDzyE 9C2DW,? public Utility() k-N`
h { `;vJ\$-< u>W:SM |E#+X } 1so9w89 ;+-Dg3 //线程睡眠 sF+Bu'9A public static void sleep(int nSecond) 5h6c W { y-i6StJ try{ eW>Y*l%B Thread.sleep(nSecond); a8wQ, } m^M sp:T, catch(Exception e) OX!<{9o { vv%
o+r-t e.printStackTrace (); c^ifHCt| } 9yt)9f } RC>79e/u< G&2`c\u{ //日志 ;H;c Sn5uL public static void log(String sMsg) RAps`)OR? { 0l&#%wmJ, System.err.println(sMsg); h~R= ?%H[ } a(BEm_l3 y>YQx\mK S%t*! public static void log(int sMsg) Q"+)xj { [x\?._> System.err.println(sMsg); ,KyG^;Riy } :G\X } K.T.?ug;: ?\7$63gBH !:<(p /* #Z)8,N **TestMethod.java lk?@ =U~ */ 7)U08" package NetFox; (o5^@aDr V0ig#?] / 80Q public class TestMethod { 2Sg^SZFH+o ,/uVq G nhZ^`mP public TestMethod() v3q.,I_ { ///xx/weblogic60b2_win.exe nS5g!GYY,k try{ xh) h#p. SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); -m"9v%>Y //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); S_ELV#X SiteFileFetch fileFetch = new SiteFileFetch(bean); Y_SB3 $]) fileFetch.start(); }Jr!aM' } v:7_ZD6kR
catch(Exception e){e.printStackTrace ();} 4[o/p8*/ cU a\@k5? } J+o6*t2|
x $@Gp _d`)N public static void main(String[] args) &u}]3E'-k { :*6#(MX new TestMethod(); ,u&K(Z% } |Y")$pjz } W8>< 点击下载更多相关资料
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