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/* M/?,Qii **SiteFileFetch.java ]y0Y ( */ 8F}drK9>F package NetFox; 1hG# import java.io.*; z%wh|q import java.net.*; |sZqqgZ- p'K`K\X jzbq{# public class SiteFileFetch extends Thread { R@o&c%K" 'o-4' D@bGJc0 SiteInfoBean siteInfoBean = null; //文件信息Bean 0B`X056|"| long[] nStartPos; //开始位置 tqGrhOt long[] nEndPos; //结束位置 JXB)'d0 FileSplitterFetch[] fileSplitterFetch; //子线程对象 w>%@Ug[" long nFileLength; //文件长度 wh8';LZ>R boolean bFirst = true; //是否第一次取文件 Y %"Ji[ boolean bStop = false; //停止标志 j7~FR{:j File tmpFile; //文件下载的临时信息 *jlIV$r_ DataOutputStream output; //输出到文件的输出流 UHZuH?|@ {~U3|_"[pX //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) xLW$>;kI public SiteFileFetch(SiteInfoBean bean) throws IOException ``-N2U5 { L'= \|r siteInfoBean = bean; R=z]) //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 9ddrtJ] tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); )E}v~GW.+ if(tmpFile.exists ()) =>$)F 4LW { ]||b2[* bFirst = false; ))"gWO read_nPos(); 3:+9H}Q } ;]dD\4_hK else 'C[tPP { 4ijtx)SA nStartPos = new long[bean.getNSplitter()]; N''QQBUD nEndPos = new long[bean.getNSplitter()]; yKc-:IBb{u } w'
7sh5 c7e,lgG- {X!OK3e /WuYg
OI } C~ 1] 1R2IlUlzFr &9yZfp public void run() Met]|& { F$7!j$
Z //获得文件长度 _'=,c" //分割文件 40t xZFQ0 //实例FileSplitterFetch (\AN0_ //启动FileSplitterFetch线程 --5F*a{R| //等待子线程返回 [l23b{ try{ -YA,Stc- if(bFirst) 0fsVbC { R/vHq36d nFileLength = getFileSize(); #<*Vc6pC if(nFileLength == -1) AC,RS7 { -o ).< System.err.println("File Length is not known!"); FdU]!GO-X } Gw*Tz" else if(nFileLength == -2) {&51@UX { /(dP)ysc System.err.println("File is not access!"); |mEWN/@C } ,Bk5(e else ./YR8 #, { }HgG<.H> for(int i=0;i<nStartPos.length;i++) @>2pY_ { +9_Y0<C nStartPos = (long)(i*(nFileLength/nStartPos.length)); &hOz(825r } -%asHDQ{ for(int i=0;i<nEndPos.length-1;i++) p*
>z:= { }3(!kW nEndPos = nStartPos[i+1]; )Qbd/zd\U } XqTguO' nEndPos[nEndPos.length-1] = nFileLength; G/_IY; } z(|^fi( } 5ya9VZ5# fkV@3sj iGyetFqKw //启动子线程 \@<7Vo, fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; }9fa]D-a? for(int i=0;i<nStartPos.length;i++) /_C2O"h { ?.~1%l ! fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &\h7E
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 98[uRywI nStartPos,nEndPos,i); B~Sj#(WEa Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); &LLU@ | fileSplitterFetch.start(); &uq.k{<p\ } &K^0PzWWof // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), UC!mp?
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); tB_le>rhl // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ai!u+L nEndPos = " + nFileLength); v3-/ [-XB: // fileSplitterFetch[nPos.length-1].start(); /$~1e7W RN$vKJk TGCB=e //等待子线程结束 f{sT*_at //int count = 0; j}+3+ 8D //是否结束while循环 vm [lMx boolean breakWhile = false; E7 Cobpm 8U{D)KgS 5zl+M` while(!bStop) ;4F6
$T'I { R/hf"E1 write_nPos(); r4yz{^G
Utility.sleep(500); E]V,
@ breakWhile = true; (,|,j(=] W`>|OiuF ;: ;E|{e for(int i=0;i<nStartPos.length;i++) UK =ELvt] { ,.,8-In^ if(!fileSplitterFetch.bDownOver) P>/:dt'GJ} { o@meogkL breakWhile = false; }d[(kC_ break; ^FVdA1~/ } +f3Rzx] } opcanl9pSW if(breakWhile) Hm-#Mpw break; YI0
wr1N `+H=3`}X A7p4M?09 //count++; jv)+qmqo! //if(count>4) bvox7V> // siteStop(); "HOZ2_(o } ~1G^IZ6 ptCF))Zm' \:vF FK4a System.err.println("文件下载结束!"); WogUILB } c{q+h V= catch(Exception e){e.printStackTrace ();} }Fe~XO` } BQu
|qrq 8_Oeui(i "j>X^vn //获得文件长度 {R1]tGOf public long getFileSize() rOJ>lPs { Y=S0|!u int nFileLength = -1; 5KCQvv\ try{ #xIg(nG URL url = new URL(siteInfoBean.getSSiteURL()); yD9enYM HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Liqo)m httpConnection.setRequestProperty("User-Agent","NetFox"); bt}8ymcG {##G.n\~ v?8WQNy int responseCode=httpConnection.getResponseCode(); Ob0sB@ if(responseCode>=400) {oQs*`=l> {
@|gG3 processErrorCode(responseCode); 15:9JVH3D return -2; //-2 represent access is error !0{SVsc) } ]kj^T?&n. {*xE+ | 4^7 v@3
String sHeader; o}N@Q-i gq LU3pCM{ h&"9v~ for(int i=1;;i++) V)$!WPL@ { C5 ~#lNC //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); a&s34Pd //Utility.log(in.readLine()); kWzp*<lWe sHeader=httpConnection.getHeaderFieldKey(i); ~
'ZwD/!e if(sHeader!=null) dSDZMB sd { u8f\)m if(sHeader.equals("Content-Length")) \0\ O/^W0 { O& Y;/$w nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); %ZVYgtk;* break; WjVBz } JVAyiNIH>M } :H}iL* else (KQLh,h7 break; bT:u|/I } 5`h 6oFxGp } @c~Z0+Ji catch(IOException e){e.printStackTrace ();} >X~B1D,SV7 catch(Exception e){e.printStackTrace ();}
*yZ6" Ww<Y]H$xZ< Ah2@sp,z Utility.log(nFileLength); a%#UF@I Tm%5:/<8 -` ]9o3E7H return nFileLength; kowS| c# } a;o0#I#Si )%C.IZ_s2 4$-R|@,|_ //保存下载信息(文件指针位置) I;4quFBlMu private void write_nPos() gawY{Jr8I { !j!w$ try{ Y9.3`VX output = new DataOutputStream(new FileOutputStream(tmpFile)); -}7$;QK&a output.writeInt(nStartPos.length); dL42)HP5 for(int i=0;i<nStartPos.length;i++) {"o9pIh{~ { *@rA7zPFf // output.writeLong(nPos); ]d*9@+Iu output.writeLong(fileSplitterFetch.nStartPos); oW~W(h! output.writeLong(fileSplitterFetch.nEndPos);
Zkp~qx } F^l1WX6 output.close(); yi$CkG} } &xGdKH
catch(IOException e){e.printStackTrace ();} {B$CqsvJ catch(Exception e){e.printStackTrace ();} 80nE QT
y } 7L~*%j & SXw=;B Z`TfS+O6 //读取保存的下载信息(文件指针位置) 1/$PxQ private void read_nPos() O-,
"/Z { * +
T(i try{ ! ._q8q\ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); &}DfIP< int nCount = input.readInt(); y##h(y nStartPos = new long[nCount]; .}__XWK5 nEndPos = new long[nCount]; CW1l;uwtU for(int i=0;i<nStartPos.length;i++) 9p_?t'&>q { @a8lF$< nStartPos = input.readLong(); Tm"H9 nEndPos = input.readLong(); oidZWy } Jm_)}dj3o input.close(); '_v~+ } V%-hP~nyBx catch(IOException e){e.printStackTrace ();} qda 2 catch(Exception e){e.printStackTrace ();} ebA:Sq:w } dIC\U 0)&!$@HW x%dny]O1; private void processErrorCode(int nErrorCode) VMah3T! { GvVkb==" System.err.println("Error Code : " + nErrorCode); 7}iv+rQ } J;& y?%{@5 ::Zo` vP /WQ.,a //停止文件下载 EL,k z8 public void siteStop() ztVTXI%Kz { 5=o ^/Vkc bStop = true; 2@S}x@^ for(int i=0;i<nStartPos.length;i++) (Yewd/T fileSplitterFetch.splitterStop(); }UyQGRZ= ~kW?]/$h +tPBm{| } 8maWF.xq } 12 p`ZD= //负责部分文件的抓取 uw mN!!TS **FileSplitterFetch.java '5h`=" */ 9=>q0D2 package NetFox; :^7w ZvRa"j JxIJxhA> import java.io.*; Nbl&al@" import java.net.*; O3 sV) 4*EMd!E=< Ph3;;,v ' public class FileSplitterFetch extends Thread { kjYM&q Dg&6@c| x^1udK^re String sURL; //File URL MblRdj6 long nStartPos; //File Snippet Start Position a_Y<daRO long nEndPos; //File Snippet End Position x2!R&q8U> int nThreadID; //Thread's ID K P]ar. boolean bDownOver = false; //Downing is over hYoUZ'4 boolean bStop = false; //Stop identical jOGdq;| FileAccessI fileAccessI = null; //File Access interface kmC@\xTp B4.:
9Od3 ;UQza ]i public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `Gio
2gl9 { D4VDWv this.sURL = sURL; y_m+&Oe this.nStartPos = nStart; aHN"I
this.nEndPos = nEnd; 8c5YX nThreadID = id; ]}3s/NJi fileAccessI = new FileAccessI(sName,nStartPos);//定位 \_Bj"K } P j C|ZPnm>f30 G)amng/ public void run() wn"}<ka { 9q"kM while(nStartPos < nEndPos && !bStop) R XCn;nM4 { Znb={hh C]!2 9q'&tU'a=c try{ v#,queGi URL url = new URL(sURL); k8D_ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); K1@Pt} httpConnection.setRequestProperty("User-Agent","NetFox"); </ [.1&S+\ String sProperty = "bytes="+nStartPos+"-"; S= 4o@3%$ httpConnection.setRequestProperty("RANGE",sProperty); 9xR5Jm>k Utility.log(sProperty); 2+9VDf2 jR%*,IeB gG?@_ie InputStream input = httpConnection.getInputStream(); -#ZvjEaey //logResponseHead(httpConnection); {s8c@-' w;lpJB\ /h>g-zb byte[] b = new byte[1024]; x3y+=aj int nRead; Tz1^"tx9 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) =UKxf { _[HZ[ 9c! nStartPos += fileAccessI.write(b,0,nRead); L-|l$Ti" //if(nThreadID == 1) @:>]jp}uq // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); \V-N~_-H } SA TX_ ~P|;Y<?3 ?~o`mg Utility.log("Thread " + nThreadID + " is over!"); #*g=F4>t bDownOver = true; j4/[Z'5ny //nPos = fileAccessI.write (b,0,nRead); H$%MIBz>$ } ^MpMqm1?8; catch(Exception e){e.printStackTrace ();} R,3cJ
Y_% } 1GYZ1iA } _/1/{ G'JHimP2j 6ld4'oM //打印回应的头信息 ">[#Ops-;$ public void logResponseHead(HttpURLConnection con) *D|a`R!Y { WZ' Z"' for(int i=1;;i++) 1Dr&BXvf]8 { 7( 84j5zb String header=con.getHeaderFieldKey(i); W\l&wR if(header!=null) <{#_;7h" //responseHeaders.put(header,httpConnection.getHeaderField(header)); =gj?!d` Utility.log(header+" : "+con.getHeaderField(header)); /"X_{3dq? else x0# Bc7y break; 0=>$J
WF } Qj^Uz+b } CV0id&Nv e\6H.9= <&\ng^Z$ public void splitterStop() 0q5J)l: { T<n`i~~ bStop = true; xX&B&"]5 } Jj=qC{] KZ 5%q. }PI:O%N; } I0mp [6 8"&!3_ d27q,2f! /* nI3p`N8j* **FileAccess.java *'?ZG/ ( *//文件访问(定位,写) Kg6J:HD49 package NetFox; s, Gl{ import java.io.*; ek&~A0k_o |.@!CqJ YYT;a$GTo public class FileAccessI implements Serializable{ rD}g9?ut T
6D+@i //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 boojq{cvYA RandomAccessFile oSavedFile; 3H,x4L5j long nPos; ] hT\"5&6 5M>h[Q"R j-9)Sijj{ public FileAccessI() throws IOException cM%?Ot,mK" { @\?HlGWEf this("",0); m.+h@ } jG1(Oe;# hNXZL>6 z@`o(gh public FileAccessI(String sName,long nPos) throws IOException ^os_j39N9 { af|h4.A oSavedFile = new RandomAccessFile(sName,"rw"); FGn"j@m0 this.nPos = nPos; Sqa9+'
[ oSavedFile.seek(nPos); 5qM$ahN3wH } lc
<V_8 :of([e|u6 @1oX public synchronized int write(byte[] b,int nStart,int nLen) [l-o*@ { N[cIr{XBGN int n = -1; +mrLMbBiD try{ J|I*n oSavedFile.write(b,nStart,nLen); Ovx
* n = nLen; li[[AAWVm } p<r^{y catch(IOException e) Z Qlk 5 { 6)1PDlB e.printStackTrace (); Q>$B.z } OkC.e')Vx vhF9|('G +JI,6)Ry return n; syr0|K[ } 43k'96[2d l0'Yq%Nf Nk@-yZ@,8 } Mst%]@TG }-tJ .3Zw >12jU m) /* G/JGb2I/7| **SiteInfoBean.java uBts?02 */ bhD-;Y!6; package NetFox; K#k/t"r -. *E<% CWeQv9h]X public class SiteInfoBean { .'=S1|_( Sqi9'-%m 7@"X?uo%o private String sSiteURL; //Site's URL pJFn
8&!J private String sFilePath; //Saved File's Path a8TtItN private String sFileName; //Saved File's Name %fF,Fnf2 private int nSplitter; //Count of Splited Downloading File IN/$b^Um 4Wgzp51Aq! 9"^ib9M public SiteInfoBean() z*T41;b {//nSplitter的缺省值为5 Osz=OO{ //default value of nSplitter is 5 80Y%C-Y: this("","","",5); -n7@r } lq.:/_m0 fDDpR= <h#7;o public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 3m&r?xZs { oOprzxf"+Z sSiteURL= sURL; *m]Y6 sFilePath = sPath; s=)W sFileName = sName; 6Mk#) ebM this.nSplitter = nSpiltter; ; s(bd#Q WT\wV\Pu mW]dhY 3X } 9iT9ZfaW A o*IshVh /{l_tiE7 public String getSSiteURL() 6)sKg{H { tC'#dU`=qY return sSiteURL; rL\}>VC) } Rng-o! ?8$`GyjS 3~fi#{ public void setSSiteURL(String value) :JSxsA6k { 3F"vK sSiteURL = value; ;q'-<O } D,=~7/g %!iqJ)*~ NUM!'+H_h public String getSFilePath() 5$+7Q$Gw { o`,}b1lh return sFilePath; *i*\dl } ^nZ=B>Yn2 nY MtK ]a.e;c- public void setSFilePath(String value) ds`YVXKH { V^tD@N sFilePath = value; k-&<_ghT \ } 0(d!w*RpG w &YUb,{Y ?J6Ek*E# public String getSFileName() #NyO' { )7Hx<?P return sFileName; RNB-W% } Q^<amM! N'{Yhx u ~I N g9| public void setSFileName(String value) :kcqf,7 { g:RS7od=, sFileName = value; 6v{&, q } fahQ^#&d` rZ,3:x-: Uy=yA public int getNSplitter() jhz*Y}MX { )j'Qi^;(D return nSplitter; )}$rgYKJ } Ruq;:5u 3KqRw (BK zdem}kBIe public void setNSplitter(int nCount) @G]*]rkKb { 2Rys:$ nSplitter = nCount; U$DZht4>u } Wk^{Tn/] } B{0]v-w FnVW%fh fph+05.% /* nv0D4 t **Utility.java 851BOkRal4 */ :)Es]wA#HZ package NetFox; WyV,(~y z z]~IxQ A]Hz?i public class Utility { y)LX?d _GY2|x2c 3R$R?^G public Utility() Hwd^C2v { VO1 hc$m1lLn B}NJs,'FJ } ga KZ4# k"7ZA>5jk //线程睡眠 CUTjRWQ public static void sleep(int nSecond) M'|[:I.V { MZ0cZv$v!~ try{ g#fn( A Thread.sleep(nSecond); 4T52vM } )M.g<[=^ catch(Exception e) RpU i' { Tn,_0 e.printStackTrace (); 8S#&XS>o } P$Yw'3v/ } V4u4{wU] rVhfj~Ts //日志 (e_p8[x public static void log(String sMsg) VxOWv8}| { )6"p@1\u System.err.println(sMsg); KBi(Ns#+ } 7H6Ge-u <:(;#&< d|87;;X|u public static void log(int sMsg) VJA/d2Oys { 0gOca +& System.err.println(sMsg); *EO*Gg0d } 0 GFho$f } f3vl=EA4| Z;u3G4XlF w?3ww7yf` /* _"H\,7E **TestMethod.java &RuTq6)r */ $uwz`N: package NetFox; irw5<l RI<smt.Ng EGFP$nvq public class TestMethod { (VkO[5j r1.zURY =>o ! public TestMethod() |gk4X%o6 { ///xx/weblogic60b2_win.exe LB.B w try{ +F,])p4,]i SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); z<P?p //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); s 7%iuP SiteFileFetch fileFetch = new SiteFileFetch(bean); bFG?mG: fileFetch.start(); {[bpvK } pi70^`@ 'B catch(Exception e){e.printStackTrace ();} [Djx@x | Wj=%Ol%o npytb*[|c } zSMM?g^T &&jQ4@m}j 'lEIwJV$ public static void main(String[] args) 2ER_?y { 37IHn6r\ new TestMethod(); $\k)Y(& } S^i8VYK,C5 } ~[aV\r? 点击下载更多相关资料
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