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/* ZN!4; **SiteFileFetch.java ,S'p%g */ )N=NR2xBZ package NetFox; _{R=B8Zz\ import java.io.*; '&.# import java.net.*; :>D[n1v R<sJ^nx t'BLVCu public class SiteFileFetch extends Thread { (7XCA,KTGI _/Gczy4)# V6t,BJjS SiteInfoBean siteInfoBean = null; //文件信息Bean `kbSu} long[] nStartPos; //开始位置 ~.A)bp long[] nEndPos; //结束位置 5O~HWBX. FileSplitterFetch[] fileSplitterFetch; //子线程对象 ]4h92\\965 long nFileLength; //文件长度 SV:4GVf boolean bFirst = true; //是否第一次取文件 HHq_P/' boolean bStop = false; //停止标志 +x_Rfk$fb File tmpFile; //文件下载的临时信息 {.Z}5K DataOutputStream output; //输出到文件的输出流 2R=DB`3 5QPM t^ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Lg~B'd8m public SiteFileFetch(SiteInfoBean bean) throws IOException IB#
@yH { ?shIj;c[ siteInfoBean = bean; |;.o8} //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); vk*=4}: tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); !PrwH; if(tmpFile.exists ()) _@
*+~9%8p { N5]0/,I} bFirst = false; p3]_}Y
D[# read_nPos(); X>NhZ5\ }
1WY/6[ else Zm=(+
f { 2>86oP& nStartPos = new long[bean.getNSplitter()]; mjWU0Gh%* nEndPos = new long[bean.getNSplitter()]; yHHt(GM|o } #{k|I$ f>piHh? [%9noB p"l3e9&'j } 3l3+A+n %=?cZfFqO BT)X8>ct public void run() D[_| *9BC { wD68tG$ //获得文件长度 \[gReaI //分割文件 {?J/c{=/P //实例FileSplitterFetch HPb]Zj //启动FileSplitterFetch线程 ,$'])A?$ //等待子线程返回 Ps%qfL\ try{ Ga# :P F0 if(bFirst) J9\a{c;. { 9cEv&3 nFileLength = getFileSize(); $aN-Y?U% if(nFileLength == -1) N@Y ljz| { TF 'U System.err.println("File Length is not known!"); <$ F\Nk|x }
fv`O4 else if(nFileLength == -2) taFn![}/!g { 87:!C5e} System.err.println("File is not access!"); 5B&;uY } C?i >.t else D\[h:8k { ~er\~kp for(int i=0;i<nStartPos.length;i++) :>TEDy~O% { &v"3*.org@ nStartPos = (long)(i*(nFileLength/nStartPos.length)); VH=S?_RY> } PH>
b-n for(int i=0;i<nEndPos.length-1;i++) \3'9Uz,OC { aX~%5mF nEndPos = nStartPos[i+1]; AX= 1b,s } 3t<a $i nEndPos[nEndPos.length-1] = nFileLength; Y`o+XimX } Qb)C[5a} } X6 6VU ]da^xWK INkD=tX //启动子线程 ?Y:8eD"* fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; zN{K5<7o for(int i=0;i<nStartPos.length;i++) "y_#7K { ;=<-5;rI fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [8Qro8 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), TQ{Han! nStartPos,nEndPos,i); }|5VRJA Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -T&.kYqnb$ fileSplitterFetch.start(); e.@uhB. } `.T}=j| // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 8me ]JRw siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); $&<uT // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", m=:4`_0Q nEndPos = " + nFileLength); e|&6$A>4] // fileSplitterFetch[nPos.length-1].start(); `5~ +,/Ys $2M#qkik- [74F6Qp //等待子线程结束 4#5:~M } //int count = 0; w.lAQ5)I%\ //是否结束while循环 =xNv\e boolean breakWhile = false; /Nr*`l hgLj< ?{U
m while(!bStop) 0 H0-U'l { Gg~QAsks
write_nPos(); >[Ye Utility.sleep(500); sf]s",t~J breakWhile = true; \EKU*5\Hp> CBDG./ {5d9$v7k4 for(int i=0;i<nStartPos.length;i++) Xe#K{gA { (`6T&>(4 if(!fileSplitterFetch.bDownOver) 9elga"4:' { OKi\zS breakWhile = false; vTaJqEE break; $b<6y/" } =xsTDjH> } ovwQ2TuK if(breakWhile) ,(.MmP` break; ;U<rc'qE [tg^GOf ' LY[~Os W //count++; M.nvB) //if(count>4) uP<0WCN // siteStop(); &AlJ "N| } 2_ :n t=*@yQ
nB U,+[5sbo System.err.println("文件下载结束!"); ,R$u?c0>'& } zNY)' catch(Exception e){e.printStackTrace ();} rU;RGz6} } 4J?t_) Ug:\ }hYZ"
A~ //获得文件长度 h'$QC )P public long getFileSize() 8)kLV_+% { A>[|g`;t int nFileLength = -1; >Bs#Xb_B] try{ RZe'Kw - URL url = new URL(siteInfoBean.getSSiteURL()); U|HB=BP HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); K_
lVISBQ httpConnection.setRequestProperty("User-Agent","NetFox"); A<\JQ TRZRYm" pDQ}* int responseCode=httpConnection.getResponseCode(); p~ .8\bI= if(responseCode>=400) ~+<olss_ { /XudV2P-CA processErrorCode(responseCode); +dBz`WD return -2; //-2 represent access is error c*`>9mv } zE)~0v4 X[2[!)Rk \uME+NF String sHeader; Mc-)OtmG[ m~lpyAw 341?0%= for(int i=1;;i++) 0wFH!s/B { 2Bk$ lx7 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ;Nr ]X //Utility.log(in.readLine()); AH4EtZC=W sHeader=httpConnection.getHeaderFieldKey(i); -`f04_@>d if(sHeader!=null) IScRsxFb { w#N?l!5 if(sHeader.equals("Content-Length")) -o+74=E8[? { $
n,Z nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); F`nb21{0y& break; cst}Ibfi } 9s}Kl($ } uY<
H#k else ^`SA'F, break; )2DQ>cm } XhdSFxW} } \([WH!7 catch(IOException e){e.printStackTrace ();} Z+pom7A"E catch(Exception e){e.printStackTrace ();} GHF_R,7 o$C|J]% ?R-9W+U%f Utility.log(nFileLength); 6DL[aD #k<":O W>M~Sk$v return nFileLength; VD4C::J } FuX 8v dY"}\v6 $|KaBx1 //保存下载信息(文件指针位置) i)Lp7m z private void write_nPos() [!^-J}^g~\ { 4yaxl\2 try{ T\VNqs@ output = new DataOutputStream(new FileOutputStream(tmpFile)); 55t\B ms{ output.writeInt(nStartPos.length); l7JY]?p for(int i=0;i<nStartPos.length;i++) pium$4l2# { y[O-pD` // output.writeLong(nPos); +pH@oFNK output.writeLong(fileSplitterFetch.nStartPos); $jd<v1"o output.writeLong(fileSplitterFetch.nEndPos); aTGdmj! } A =Dhod output.close(); Px M!U!t } kl1Y] ?z} catch(IOException e){e.printStackTrace ();} e75UMWaeC catch(Exception e){e.printStackTrace ();} <Fs-3(V+\ } _,6f#t ,}xbAA# P6Bl
*@G //读取保存的下载信息(文件指针位置) 9Q W&$n^ private void read_nPos() kC$&:\Rh { (#q<\` try{ 4R>zPEo DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); o2-@o= F int nCount = input.readInt(); }a&mY^ nStartPos = new long[nCount]; R7~Yw*#, nEndPos = new long[nCount]; 5&CDHc7Oj for(int i=0;i<nStartPos.length;i++) rZ_>`}O2 { VohhQ nStartPos = input.readLong(); kllQca|$4 nEndPos = input.readLong(); /?"8-0d } JO@Bf input.close(); O`cu_ } TO;.eN!sv catch(IOException e){e.printStackTrace ();} RV-h IdAU catch(Exception e){e.printStackTrace ();} ? 81X } ,pq{& A Wv!<bT8r N0n^L|(R private void processErrorCode(int nErrorCode) /T0nLp`gi { K#K\-TR|$ System.err.println("Error Code : " + nErrorCode); #>@z
2K7 } v_PdOp[
k lf>nbvp AF4?IH //停止文件下载 A1cb"N^ public void siteStop() tPHS98y { 1'6cGpZY bStop = true; ZF#Rej? for(int i=0;i<nStartPos.length;i++) o%M<-l"!/ fileSplitterFetch.splitterStop(); Bk|K%K Jx-wO/ WV kR56 } <c,~aq#W' }
tUE'K.- //负责部分文件的抓取 ]*%+H|l **FileSplitterFetch.java ~3WL)% */ z&nZ<ih
package NetFox; i cUT<@0 *QE<zt Z&!!]"I import java.io.*; j?(!^ _!m import java.net.*; sCH)gr@gJ^ v.Ogf5 H D/5!d public class FileSplitterFetch extends Thread { FQeYx-7 XOb}<y)r~ ^9"KTZc-* String sURL; //File URL E\)eu1Hw4B long nStartPos; //File Snippet Start Position Mxz,wfaH> long nEndPos; //File Snippet End Position UWG+#,1J.\ int nThreadID; //Thread's ID Kf7WcJ4b boolean bDownOver = false; //Downing is over =N.!k Vkl boolean bStop = false; //Stop identical sDiHXDI_m FileAccessI fileAccessI = null; //File Access interface FT\?:wpKa ((DzUyK X=p"5hhfn public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException c^I0y! { #]KgUc5B this.sURL = sURL; 9\O(n> this.nStartPos = nStart; ,8K'F
this.nEndPos = nEnd; 3"
Vd==oK~ nThreadID = id; ,axDMMDI fileAccessI = new FileAccessI(sName,nStartPos);//定位 _Sj}~H } ;q#]-^ 32XS`Z ^nDal':* public void run() OOy}]uYF` { gp< =Gmd while(nStartPos < nEndPos && !bStop) Jj"HpK>[ { hol<dB eG]a zt }VRvsZ try{ 9zKBO* p` URL url = new URL(sURL); O+.*lo HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Z>A{i?#m httpConnection.setRequestProperty("User-Agent","NetFox"); -$4kBYC l+ String sProperty = "bytes="+nStartPos+"-"; 3(lVmfk httpConnection.setRequestProperty("RANGE",sProperty); W"(u^} Utility.log(sProperty); y8s=\`~PR ^7XAw:
? }Zl"9A#K InputStream input = httpConnection.getInputStream(); Px4/O~bLk //logResponseHead(httpConnection); oNRG25 z-u?s`k** v|+5:jFOqb byte[] b = new byte[1024]; F&@ |M( int nRead; ]A:( L9 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) K84&sSi { o)]FtL:mm nStartPos += fileAccessI.write(b,0,nRead); 6}&^=^- //if(nThreadID == 1) Enj_tJs // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 2cnj@E:5l } |4SW[>WT: &IQ%\W#aY fGu!M9qN4 Utility.log("Thread " + nThreadID + " is over!"); f$D@*33ft bDownOver = true; e@
oWwhpE //nPos = fileAccessI.write (b,0,nRead); *6*-WV6 } @FX{M.. catch(Exception e){e.printStackTrace ();} ju{%'D!d9 } RV!<?[ }
-0|K,k W);W.:F cC6z,0`3 //打印回应的头信息 eqFvrESN~= public void logResponseHead(HttpURLConnection con) ePA;:8)_j { G(OFr2M for(int i=1;;i++) z\Ui8jo:; { 9O >z4o String header=con.getHeaderFieldKey(i); i>GdRG&q if(header!=null) T\3 [F%? //responseHeaders.put(header,httpConnection.getHeaderField(header)); sc xLB; Utility.log(header+" : "+con.getHeaderField(header)); ?y_awoBd1 else 6"%qv`.Fp break; BlaJl[P iv } B7 c[4 } .Ty,_3+{#p Vipp /WV ~%P3Pp public void splitterStop() ;X7i/DQ { j.&
;c'V$. bStop = true; >h7$v~nra } SfDQ;1? VK4/82@5 TG]}X\c+V| } Kq7C0)23 3j&B(aLy Tk+DPp^ /* $c9=mjwH **FileAccess.java )>$^wT *//文件访问(定位,写) ,>S+-L8 package NetFox; 9.-47|-9C import java.io.*; x u,htx wP`sXPSmIu UPO^V:.R4 public class FileAccessI implements Serializable{ ysth{[<5F3 5B|,S1b //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 2FT-}w0; RandomAccessFile oSavedFile; 3Uo]>BG long nPos; ZYKd G+C}<S} n_;S2KM public FileAccessI() throws IOException ,aO@.<" { y< ud('D this("",0); msG3~@q } j0?>w{e ?Ccw4]YO,= bX&e_Pd public FileAccessI(String sName,long nPos) throws IOException /s8/q2: { MCd F!{ oSavedFile = new RandomAccessFile(sName,"rw"); i*
gKtjx this.nPos = nPos; "aA_(Ydzj oSavedFile.seek(nPos); Xq%*#)M; } -pX|U~a[ j J-d/"( V0T<e H< public synchronized int write(byte[] b,int nStart,int nLen) oT!/J { :p$EiR int n = -1; D"`[6EN[ try{ ]umZJZ#Y oSavedFile.write(b,nStart,nLen); *o2#eI n = nLen; -fQX4'3R } 4@/z catch(IOException e) $owb3g(%4 { %09*l%,; e.printStackTrace (); )-)pYRlO } ,5:![ ' 3VqkQ4 PC0HH return n; O(Td:Zdp } OaNc9c" <vLdBfw&N i :EO(` } c
_p[yS ooDdV
> #!1IP~ /* IadK@?X6j **SiteInfoBean.java ;YM]K R; */ ex=)H%_| package NetFox; 1^tSn#j zM\IKo_" )1K! [W}t public class SiteInfoBean { H}a)^90_ )Oo2<:" D2Vv\f private String sSiteURL; //Site's URL pd7O`.3 private String sFilePath; //Saved File's Path t#{x?cF private String sFileName; //Saved File's Name e@yx}:]h private int nSplitter; //Count of Splited Downloading File )5'rw<:=" ]*a@*0= _ flgQ public SiteInfoBean() i<Q&
D\Pv {//nSplitter的缺省值为5 OMi02tSm //default value of nSplitter is 5 mDlCt_h this("","","",5); W0U`Kt&~a } /t$*W\PL@ niQ+EAD i<bxc public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) B#Qpd7E+* { r:.6"VQu} sSiteURL= sURL; U(P:J e sFilePath = sPath; Z$1.^H.Db sFileName = sName; I}rGx this.nSplitter = nSpiltter; h&q=I.3O|? b24di
wFp~ } ` %l&zwj> f@h2;An$w ['?^>jfr public String getSSiteURL() 48:liR { xSdN5RN return sSiteURL; K_Z+]]$# } Z~:/#?/ @|E;}:?u R
!Fx)xj public void setSSiteURL(String value) ZRX^^yN { F68},N>vr@ sSiteURL = value; /G{&[X<4U } 8 NxUx+] 4bPqmEE Kq8(d`g} public String getSFilePath() sC!1B6: { >,kL p|gA return sFilePath; bG"6pU } KUlB2Fqi Ko4)0& {qY3L8b public void setSFilePath(String value) ?<Z)*CF) { A\Lr<{Jh sFilePath = value; H]VsOr } V/@[%w= fYb KmB <=$rU232} public String getSFileName() $^]
9 { VtD@&N return sFileName; D7EXqo } K<RmaXZ 0BT;"B1 )o86lH"z public void setSFileName(String value) P_kaIPP { f%vHx, sFileName = value; =_K%$y* } IES41y< 8y-e+ *iPs4Es- public int getNSplitter() ,:c:6Y^ { gkSGRshf return nSplitter; LQ~LB'L } 9cl{hdP{ Z@<q/2).| }m9S(Wal public void setNSplitter(int nCount) f:n] Exsy { _e;N'DZ nSplitter = nCount; O\LjtMF } mipi]*ZfXE } FAH[5VDr% "ugX
/r$_ 5JO[+> /* zC<'fT/rG **Utility.java M|1eqR%x-? */ N5[_a/ package NetFox; ~l;yr
@ (PRaiE s4!|v`+$M public class Utility { nrxjN(9V%+ #&;m<% cjCE3V9X public Utility() zG&WWc`K { [6Uud iw QWU5-p9e8 bv .EM } ON:LPf>"- 8yY"x
[' //线程睡眠 71K\.[ =- public static void sleep(int nSecond) Q,[rrG;?@ { }~7H2d);- try{ R
tXF Thread.sleep(nSecond); }T?i%l } >:3xi{ catch(Exception e) e-nWD { ##SLwrg e.printStackTrace (); $xKg }cO } i n[n Aa } 9itdRa== dL1~]Z
y
//日志 _Ym&UY.u# public static void log(String sMsg) dM);LT8@ { M>`?m
L System.err.println(sMsg); Hj}g1"RA } MsN2A6|33 Z\ "Kd ?AqrlR]5 public static void log(int sMsg) BZ]&uD|f
{ @t{{Q1 System.err.println(sMsg); yVbg,q'?
} @ef//G+Z" } |NphG| ~EM#Hc, =Bcux8wA#6 /* jldcvW **TestMethod.java yb@X*PW/z */ SL?%/$2g=O package NetFox; }'@tA")-) *#X+Gngo I v 80,hW public class TestMethod { z|t.y.JX }w|=c>'_} `<]P"G public TestMethod() :epitpJ { ///xx/weblogic60b2_win.exe e8WPV try{ +lY\r + ; SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); :Su 5 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); OF<[Nh\. SiteFileFetch fileFetch = new SiteFileFetch(bean); -y7l?N5F> fileFetch.start(); ex;Yn{4 } s+OvS9et_ catch(Exception e){e.printStackTrace ();} NKIk d .HH,l S4@117z5 } ~|$) 1 $=;bccIob %j
9vX$Hj public static void main(String[] args) W#oEF/G { ;DT"S{"7 new TestMethod(); >o=axZNa } (_s!,QUe } D9@<#2- 点击下载更多相关资料
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