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/* |ij5c@~& **SiteFileFetch.java TKBK3N */ 2yO)}g FJ package NetFox; HNUR6H&Fta import java.io.*; w7?9e#>Z import java.net.*; ]4Yb$e` @DC2ci
> h|uP=0 public class SiteFileFetch extends Thread { T( Gf~0HYF .O-DVW Cm 9X&qdA/q SiteInfoBean siteInfoBean = null; //文件信息Bean e`2R{H long[] nStartPos; //开始位置 xr3PO?: long[] nEndPos; //结束位置 W9m[>-Ew FileSplitterFetch[] fileSplitterFetch; //子线程对象 .lj! ~_ long nFileLength; //文件长度 G]DN!7]@g boolean bFirst = true; //是否第一次取文件 <mgTWv boolean bStop = false; //停止标志 1Kf
t?g File tmpFile; //文件下载的临时信息 lGBdQc]IL DataOutputStream output; //输出到文件的输出流 k<";t LmdV@gR //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) mb`}sTU). public SiteFileFetch(SiteInfoBean bean) throws IOException w8#>xV^~ { y\|\9Q%D siteInfoBean = bean; HPCA$LD //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Nl)jQ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); AS"|r if(tmpFile.exists ()) C^:&3, { [>9"RzEl bFirst = false; !4.^@^L|\ read_nPos(); Uk ;.Hrt. } [a*>@IR else ]BD5+>; { ~{$'s p0 nStartPos = new long[bean.getNSplitter()]; aYCzb7 nEndPos = new long[bean.getNSplitter()]; 4xn^`xf9
} :+^llz @gGuV$Mw ^52R`{ )g^Ewzy^X } ly5L-=Xb l hp:. $
rnr;V public void run() zVLi { Y6;9j=[ //获得文件长度 G'C^C[_W //分割文件 < io8
b|A //实例FileSplitterFetch {#Cm> @') //启动FileSplitterFetch线程 $K6`Q4` //等待子线程返回 P>Rqy try{ M
+q7h+HP if(bFirst) 0nnq/u^ { (Sp~+#XnF nFileLength = getFileSize(); rGL{g&_ if(nFileLength == -1) ^S2}0Nf { \)kAhKtG System.err.println("File Length is not known!"); ?|YQtY } MdjMTe s else if(nFileLength == -2) HW,55#yG { ZP/=R<< System.err.println("File is not access!"); .JKaC>oX } +N&(lj else /`@>v$oo { Fpwh.R:yV for(int i=0;i<nStartPos.length;i++) TL:RB)- < { h;[Ncj] nStartPos = (long)(i*(nFileLength/nStartPos.length)); T=Q{K|JE } ,IATJs$E for(int i=0;i<nEndPos.length-1;i++) hd%F7D5 { T5+b{qA nEndPos = nStartPos[i+1]; 5R
G5uH/-< } ^TK)_wx nEndPos[nEndPos.length-1] = nFileLength; ]>T/Gl1 } (2)9TpE; } ee` =B <L#r6y~H {0{$.L //启动子线程 :?W:'% (`[ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; `sC8ro@Fm for(int i=0;i<nStartPos.length;i++) g<3>7&^ { 9DKB+K.1 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $>m<+nai' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), D8XXm lo nStartPos,nEndPos,i); 7s3<} Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); GdY^}TJrh fileSplitterFetch.start(); "S#hzrEdYI } zH4#\d // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &>t1A5 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); A*;h}\n // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", :\RB ^3; nEndPos = " + nFileLength); `q*ABsj // fileSplitterFetch[nPos.length-1].start(); Z] }@#/
n 0q!{&pt o 4wKu //等待子线程结束 j
pV //int count = 0; syvi/6 //是否结束while循环 H>9$L~ boolean breakWhile = false; =Ybu_> aQ\O ]gCE \C|06Bs$
while(!bStop) zf#&3K 'k { r6G)R+ # write_nPos(); ~=*_I4,+r Utility.sleep(500); 4ebGAg ?_ breakWhile = true; xy>mM"DOH *%sYajmD sBL^NDqa2 for(int i=0;i<nStartPos.length;i++) 8^T$6A[b { {eV_+@dT if(!fileSplitterFetch.bDownOver) RL9P:]
^ { U"Oq85vY breakWhile = false; :wm^04<i break; EZV$1pa } &Y$rVBgQ } H\vO0 <X if(breakWhile) 5H2|:GzUc break; 1cega1s3xR HR ysPW< //count++; 24fWj?A| ^ //if(count>4)
1<5yG7SZ // siteStop(); f^ qQ5N } RJM(+5xQ| Fjb[Ev eKOTxv{ System.err.println("文件下载结束!"); mH"`46 } Q<qIlNE catch(Exception e){e.printStackTrace ();} _i#Z'4?2E } `R^VK-=C eF@E|kK \=~Ap#Mpc4 //获得文件长度 duCm+4,. public long getFileSize() DGnswN%n1 { rO GJ%|%( int nFileLength = -1; Xs/hqIXB try{ I(4k{=\ph] URL url = new URL(siteInfoBean.getSSiteURL()); j?A+qk HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); XijQ)}'C3 httpConnection.setRequestProperty("User-Agent","NetFox"); Mtr~d XA68H!I YX(%jcj* int responseCode=httpConnection.getResponseCode(); ~S9nLb:O{ if(responseCode>=400) C
Qebb:y { FKP^f\!M processErrorCode(responseCode); j&9~OXYv return -2; //-2 represent access is error NINiX( } *?S\0a'W@ gFH_^~7i8p N>_7Ltw/ String sHeader; |j<'[gB\p ]F~5l?4u# #*~Uu.T for(int i=1;;i++) t
+_G%tv { 6~s,j({^ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); iu .{L(m //Utility.log(in.readLine()); NKRXY~zHh sHeader=httpConnection.getHeaderFieldKey(i); 7~&Y"& if(sHeader!=null) ~Y(M>u.+! { @?U5t1O< if(sHeader.equals("Content-Length")) +-"#GL~cC { v|xlI4 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); )Jc>l;G(M break; C+Z"0\{o } LuVj9+1 S } a5iMCmL+ else SV~xNzo~ break;
1Sy#* } ,rKN/{M! } lc#H%Qlg catch(IOException e){e.printStackTrace ();} DuWP)#kg catch(Exception e){e.printStackTrace ();} ~gf$ L9 LLE~V~j ,#A,+!4 Utility.log(nFileLength); ) E\pQ5& tv0xfAV g 0L 4 return nFileLength; UpITx]y?"m } km^AX:r1 z(ajR*\# B@4#y9`5 //保存下载信息(文件指针位置) I'gnw~ private void write_nPos() "~ /3 { \yqiv"' try{ ;Cwn1N9S output = new DataOutputStream(new FileOutputStream(tmpFile)); gOk O8P6P8 output.writeInt(nStartPos.length); 1;h>^NOq for(int i=0;i<nStartPos.length;i++) l@Ki`if { YW5E
| z // output.writeLong(nPos); gSC@uf output.writeLong(fileSplitterFetch.nStartPos); Pzqgg43Xf output.writeLong(fileSplitterFetch.nEndPos); Z`W.(gua } 1ysA~2 output.close(); buoz La } .q=X58tHu catch(IOException e){e.printStackTrace ();} b7n~z1$ catch(Exception e){e.printStackTrace ();} `XnFc*L 1 } }8svd#S+ ns3k{l# oTL "]3`' //读取保存的下载信息(文件指针位置) ,uw&)A private void read_nPos() y|aWUX/a { yD KX, try{ L=$P DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 0MOAd!N int nCount = input.readInt(); L \$zr,=C nStartPos = new long[nCount]; |!|`Je3 K nEndPos = new long[nCount]; \8pbPo=x for(int i=0;i<nStartPos.length;i++) g/E;OcFaO { >eXNw}_j
nStartPos = input.readLong(); 23>?3-q nEndPos = input.readLong(); B[$e;h*Aw[ } g
(~& input.close(); ldxUq,p } ck}y-,>,[O catch(IOException e){e.printStackTrace ();} &qr7yyY catch(Exception e){e.printStackTrace ();} oH;Y} h } F,D& V$@2:@8mo vD(;VeW[ private void processErrorCode(int nErrorCode) VS`S@+p { dU\fC{1Z System.err.println("Error Code : " + nErrorCode); T|m+ULp~ } =:b/z1-v #: F)A_Y 3lJK[V{'#' //停止文件下载 aV ^2 public void siteStop() `8Om*{xg { ~$cw]R58,9 bStop = true; j}|6k6t for(int i=0;i<nStartPos.length;i++) <D=%55 fileSplitterFetch.splitterStop(); z/TRqD [7B&<zY/? \KEL.}B9E } ;HC"hEc! } 83dOSS2 //负责部分文件的抓取 Pk,^q8; **FileSplitterFetch.java 6e*JCf> */ Y,a.9AWw) package NetFox; @.5Ybgn _V;J7Vz wjl?@K
import java.io.*; Kb}N!<Z* import java.net.*; u0x\5!?2
i"b*U5k Y8d%L;b[D public class FileSplitterFetch extends Thread { <
;g0?M\ { sZrI5 kN_LD- String sURL; //File URL 6(z.(eT long nStartPos; //File Snippet Start Position JvG t=v long nEndPos; //File Snippet End Position b/ynCf8X int nThreadID; //Thread's ID bi5'- .B
boolean bDownOver = false; //Downing is over u&<LW4 boolean bStop = false; //Stop identical iZ58;` FileAccessI fileAccessI = null; //File Access interface 0+L5k!1D C>;}CH|X iU3co|q7 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException V +hV&|= { J@$>d this.sURL = sURL; uIR_p\) this.nStartPos = nStart; F[+sc Mx!G this.nEndPos = nEnd; )TWf/Lcp nThreadID = id; LvR=uD fileAccessI = new FileAccessI(sName,nStartPos);//定位 55AG>j&41 } w#o<qrpHf 0
cQf_o :9)>!+|' public void run() 6"wY;E { 0}ZuF. while(nStartPos < nEndPos && !bStop) )JjfPb64 { z`BRz& Fb_~{q XnNK)dUT} try{ P}PSS#nn URL url = new URL(sURL); > {:8c-\2} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); YRwS{e*u httpConnection.setRequestProperty("User-Agent","NetFox"); :c6%;2 String sProperty = "bytes="+nStartPos+"-"; A*$vk2VWw httpConnection.setRequestProperty("RANGE",sProperty); wM|-u/9+ Utility.log(sProperty); UVUHLu|^ -wO`o< # ><.zZ InputStream input = httpConnection.getInputStream(); 5?Bi+fg //logResponseHead(httpConnection); fpzTv3D=I L'c4i[~s Um|:AT}`^ byte[] b = new byte[1024]; { u;ntDr int nRead; 3(CUC while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) V9MA)If> { <uAqb Wu nStartPos += fileAccessI.write(b,0,nRead); f5O*Njl //if(nThreadID == 1) 0!^{V:DtQ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 20J:_+=] } `aC#s3[ 4iKT co;2s-X Utility.log("Thread " + nThreadID + " is over!"); kt@+UK." bDownOver = true; h rZ\ O?j //nPos = fileAccessI.write (b,0,nRead); :]]amziP& } $k!t&G catch(Exception e){e.printStackTrace ();} Zw }7vD0 } 6h5*b8LxA } *zmbo >{( 2;q6~Y, ]2(
%^#qBG //打印回应的头信息 l\S..B
+ public void logResponseHead(HttpURLConnection con) c~>M7e( { ^x4gUT-Wy for(int i=1;;i++) SmRU!C$A { L5>>gG, String header=con.getHeaderFieldKey(i); 2\7]EW if(header!=null)
Gjzhgz-- //responseHeaders.put(header,httpConnection.getHeaderField(header)); j\W+wnAgk Utility.log(header+" : "+con.getHeaderField(header)); L-MpdC else o`&idn|, break; j6Vuj/+} } "=qdBG9 } Q@M,:0+cy Q.5a"(d@ ov|s5yH8e public void splitterStop() VJwzYl { `]fY9ZDKs bStop = true; :@pmgp } Hiw{1E:rW OnD+/I ;ymUMQ%;/ } h'N,oDB) ]o_ Ps| haY.rH]z /* D L$P **FileAccess.java ."MBKyg6 *//文件访问(定位,写) ]qrO"X= package NetFox; u|Db%)[ import java.io.*; >0f5Mjug n0EKNMO &<L+;k~P% public class FileAccessI implements Serializable{ ~
Iv[ u[cbRn,W //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 b|4h2iuM RandomAccessFile oSavedFile; Qs~;?BH& long nPos; d,$[633It} 'a4xi0**I @O4m-Oosi public FileAccessI() throws IOException /Cwt4.5 { >bmL;)mc& this("",0); 398%16} } R|Ykez!D T8ZsuKio] K+n6.BzW public FileAccessI(String sName,long nPos) throws IOException f\Pd#$3 { Rh:\/31~ oSavedFile = new RandomAccessFile(sName,"rw"); 03#r F@e this.nPos = nPos; cA_v*`YL oSavedFile.seek(nPos); Yj;$hV8j( } cz.-cuD[iD @1rF9<
4g R_(A&, public synchronized int write(byte[] b,int nStart,int nLen) PF4Cs3m/ { }"_S;[{d int n = -1; %vMi
kibI try{ YsLEbue oSavedFile.write(b,nStart,nLen); #K
]k n = nLen; /EWF0XV! } #OG_OI catch(IOException e) M)Y`u { Ib]{rmaP e.printStackTrace (); 84|Hn|4t } D
@T,j4o #Mi>f4T; \Q]2Zq return n; tTC[^Dji } TVYO`9:CW ?. CA9!| @|r*yi } Rh,*tS L{osh0 sexnO^s /* Av7bp[OD **SiteInfoBean.java e>Is$+[`7 */ R$NH [Tz package NetFox; WCU[]A Wrt3p-N"D HlLF<k~} public class SiteInfoBean { w0VJt<e* Gv3a<Knn4 ~[l2"@ private String sSiteURL; //Site's URL G^oBu^bq~ private String sFilePath; //Saved File's Path Xv6z>z. private String sFileName; //Saved File's Name = R; 0Ed&b private int nSplitter; //Count of Splited Downloading File 8!E$0^)c| X+Xjf( pX|\J>u) public SiteInfoBean() 6i, d| {//nSplitter的缺省值为5 0l{').!_ //default value of nSplitter is 5 7w YSP&$ this("","","",5); j2g#t } }h EBX:- Cd]d[{NJ; "wA3l%d[Y public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ,Rz,[KI| { 61b,+'- sSiteURL= sURL; *p p1U>, sFilePath = sPath; cKdy)T%; sFileName = sName; J3g>#N]='( this.nSplitter = nSpiltter; >\[sNCkf w=y!|F hP,SvN#!2 } [Kx_ %Le
0}-&v+ zZGPA j public String getSSiteURL() @\b*a]CV { !uy?]l return sSiteURL; M"ZP s } AZxOq !B {PWz:\oaD pNCk~OM public void setSSiteURL(String value) !JJCG { ey@y?X= sSiteURL = value; 2j*\n|"}{ } tihb38gE i%D/@$\D6 vUY?Eb[ public String getSFilePath() A<QYW,:| { )k- 7mwkZ return sFilePath; VNx}ADXu ] } `{<2{}2M mRxL%! +);o{wfW public void setSFilePath(String value)
YNH>^cD1 { 3@\vU~=P: sFilePath = value; [AfV+$ } (/Hq8o-Fw \bZbz/+D M
+~guTh public String getSFileName() o#4Wn'E { VEd\* return sFileName; i=#r JK= } u,*$n'l] \/. Of]YQ Lb{~a_c public void setSFileName(String value) m{I_E
G { 6^s]2mMfk sFileName = value; Z#3wMK~ } fZ 17 e}-uU7O )|q,RAn public int getNSplitter() RHz'Dz>0 { VsNqYFHes& return nSplitter; ?so3Kj6H } T<mk98CdE '[{M"S 4ehajK public void setNSplitter(int nCount) &:nWZ!D { mAX]m 1s nSplitter = nCount; )U`H7\*) } kS[k*bN0 } ^-f5;B`\i x\3tSP7Vp |Gzd|$%Oq /* |bVNlL"xN **Utility.java Xa Yx avq */ >OBuHqC package NetFox; U3&*,xeU@H I^qk` 5w /1gKc}rB2 public class Utility { o.Mb~8Yu ec)G~?FH I,l%6oPa public Utility() \4bma<~a { 0 jVuFl 0/#XUX 4 "mSDL:$ } O_FT@bo\ .KIAeCvl\ //线程睡眠 #Z"N\49 public static void sleep(int nSecond) @R9 { 0v,DQJ?w8 try{ 44
o5I: Thread.sleep(nSecond); ^>72<1U% } m32OE`s catch(Exception e) L>).o%(R { i/,G=yA e.printStackTrace (); $xvEYK } EJNj.c-# } ~bWqoJ;Q ;KbnaUAS8 //日志 w(k7nGU] public static void log(String sMsg) X6N^<Z$ { lmz{,O System.err.println(sMsg); /thCu%%9A } uY5f mM9 aL-V 9y D@"q2 ! public static void log(int sMsg) a`~$6
"v { hOO)0IrIM* System.err.println(sMsg); Z5bmqhDo[ } @ J!)o d } KVSy^-." @:oMlIw; 49
fs$wr@ /* <Lyz7R6 **TestMethod.java |*Z'WUv */ |/]bpG 'z package NetFox; +`mJh\* 3S_KycE{ Yu9Ccj` public class TestMethod { g5M-Vu |2
g }i\ Ipb4{A&"\ public TestMethod() U:J~Oy_Z { ///xx/weblogic60b2_win.exe hh |'Uq3 try{ `Rm2G SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); [A
yq%MA //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); P=KOw;bs SiteFileFetch fileFetch = new SiteFileFetch(bean); L_<&oq fileFetch.start(); dGQy=T: } cJ&l86/l1 catch(Exception e){e.printStackTrace ();} 4Qz [j1SX-NX 7`~h'(k } KG4~t=J` ;k (}~_ t1n'Ecm( public static void main(String[] args) $B2*
x$ { GNZQj8 new TestMethod(); *xkbKkm } $QNfy.6Tn } .^,fw=T|1 点击下载更多相关资料
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