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/* `|?<KF164 **SiteFileFetch.java ^AaE$G&: */ XV]xym~ package NetFox; 8+}rm6Y+ import java.io.*; <3BGW?=WP import java.net.*; l3>e-kP x0JW # euG$( public class SiteFileFetch extends Thread { `x/i1^/_@ x>Q% hl 'Xj^cX SiteInfoBean siteInfoBean = null; //文件信息Bean d=qVIpZ long[] nStartPos; //开始位置 PHqg~q;* long[] nEndPos; //结束位置 J.R\h! FileSplitterFetch[] fileSplitterFetch; //子线程对象 6384$mT,S long nFileLength; //文件长度 F +(S-Qk1 boolean bFirst = true; //是否第一次取文件 [BD`h boolean bStop = false; //停止标志 ZAn @NA= File tmpFile; //文件下载的临时信息 n4S`k%CI DataOutputStream output; //输出到文件的输出流 xw}yl4WT{ .Ji9j[[#D //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) h>D;QY public SiteFileFetch(SiteInfoBean bean) throws IOException tt?`,G.(] { E-.X%xfO siteInfoBean = bean; >9A18xC //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); C{85#`z` tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); sED"}F) if(tmpFile.exists ()) (FApkvy { B._YT bFirst = false; r/'!#7dLG- read_nPos(); |{kbc0* } lr~
|=}^ else "/e)v{ { 4x[_lsj nStartPos = new long[bean.getNSplitter()]; rIcgf1v70 nEndPos = new long[bean.getNSplitter()]; yjL+1_"B } ?SFQx\/ R)JH D7
1 ub~ t} ^.8~}TT-U } z~vcwiYAP GWuKDq G)I`
M4}*n public void run() }6-olVg { Yft [)id //获得文件长度 C}mhnU@ //分割文件 ,H+Y1N4W( //实例FileSplitterFetch U[x$QG6 m! //启动FileSplitterFetch线程 4%~*} //等待子线程返回 mN]WjfII try{ ;UTM9.o[ if(bFirst) Q&r.wV| { -fFtHw:kHh nFileLength = getFileSize(); C_Q3^mLx if(nFileLength == -1) A_S7z*T { gjG SI'M0B System.err.println("File Length is not known!"); 07:V[@' } ~M^[ else if(nFileLength == -2) r_$*euh@ { @,.D]43 System.err.println("File is not access!"); _J6
Xq\ } r6uN6XCM else u:|^L]{ { qH4|k2Lm for(int i=0;i<nStartPos.length;i++) P1rjF:x[* { jdJTOT nStartPos = (long)(i*(nFileLength/nStartPos.length)); @ !su7 } 8b'@_s!_ for(int i=0;i<nEndPos.length-1;i++) !38KHq^|& { vO2WZ7E! nEndPos = nStartPos[i+1]; H%Gz" } Qf^c}!I nEndPos[nEndPos.length-1] = nFileLength; ;&6
{c } yZNG>1N } BZQ}c<Nl (J5}1Q<K ,3_Sf? //启动子线程 E5rV}>(Y fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; fV>d_6Lf} for(int i=0;i<nStartPos.length;i++) oMg-.!6 { Gl'G;F$Y- fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), W/BPf{U siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ;]grbqXVE nStartPos,nEndPos,i); 41Q5%2
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); $L0sBW& fileSplitterFetch.start(); I
m
I$~q' } q{9 \hEeb // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $?W2'Xm!V siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); q}L`8(a // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 5xdeuBEY8 nEndPos = " + nFileLength); ?lD)J?j // fileSplitterFetch[nPos.length-1].start(); ;&CLb`<y g?"QahHG 7!cLTq //等待子线程结束 \_,p@r]Q //int count = 0; MwRLv,&" //是否结束while循环 xkRMg2X.>9 boolean breakWhile = false; kqih`E9P7B Skci;4T( 1}la)lC while(!bStop) k^;n$r"i5 { qA)YYg/G write_nPos(); s$pXn&: Utility.sleep(500); 8&8!(\xv breakWhile = true; <9X@\uvU.< yR|2><A uFSU|SDd. for(int i=0;i<nStartPos.length;i++) 5GScqY,aB { i!}k5k*Z if(!fileSplitterFetch.bDownOver) n?cC]k;P~ { $Okmurnn breakWhile = false; .5a>!B.I break; _2G _Io } LXX('d } HJ]v- if(breakWhile) >D!R)W` break; .+(V</ F\+AA FhY#3-jH //count++; R&(OWF;~, //if(count>4) WcqR; Nm // siteStop(); EQlb:;j } \54B &Iy5@8 9pnOAM} System.err.println("文件下载结束!"); %Ve@DF8G } nu+K
N,3R" catch(Exception e){e.printStackTrace ();} /xJD/"Y3& } w*XM*yJHU 4Pc-A wJ2cAX;" //获得文件长度 nE8z1hBUq public long getFileSize() "|Q.{(|kO1 { E<+ G5j int nFileLength = -1; ~{lb`M^]h try{ X<8|uP4 URL url = new URL(siteInfoBean.getSSiteURL()); I ==)a6^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 'qT;Eht5 httpConnection.setRequestProperty("User-Agent","NetFox"); 5&Yt=)c\ zs]ubJC@ >&;J/ME int responseCode=httpConnection.getResponseCode(); ]'Eg2(wy if(responseCode>=400) zGU MH7 M { ?:9y
!Q= processErrorCode(responseCode); iT==aJ=~/& return -2; //-2 represent access is error V WZpEi } 2o<*rH I"czo9Yspd W8^A{l4 String sHeader; &T, ,fz$ I1>f2/$z* G 0pq'7B for(int i=1;;i++) :Y /aT[ { 3>VL>;75[ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); GYQ:G= //Utility.log(in.readLine());
sG#O s sHeader=httpConnection.getHeaderFieldKey(i); ?1\I/'E9 if(sHeader!=null) 3v_j*wy { /Q@4HV if(sHeader.equals("Content-Length")) eG(YORkR { /~'C!so[v nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); r~T!$Tb break; LAk
.f } "W6cQsi } ]'xci"qV` else YQ:$m5ai break; _Kaqx"D } W[J2>`k9 } wwdmz;0S catch(IOException e){e.printStackTrace ();} N~/X.D4e# catch(Exception e){e.printStackTrace ();} l=XZBe*[g' A<c<!N Xxh^4vKjX Utility.log(nFileLength); 2H$](k?
=Ks&m4 UNb7WN return nFileLength; T U_'1 } 0cB]:*W .?NfV%vv vT{(7m!Ra //保存下载信息(文件指针位置) p9i7<X2& private void write_nPos() no-";{c { 6
DQOar>d try{ Cu%BU}( output = new DataOutputStream(new FileOutputStream(tmpFile)); 4qDO(YWf output.writeInt(nStartPos.length); 4`l$0m@> for(int i=0;i<nStartPos.length;i++) ~\-=q^/! { b~fl,(sZp // output.writeLong(nPos); [F*yh9%\ output.writeLong(fileSplitterFetch.nStartPos); ^n~Kr1}nj output.writeLong(fileSplitterFetch.nEndPos); *<cRQfA1 } BKTTta1mY output.close(); xS@jV6E~ } (^B1Kt!< catch(IOException e){e.printStackTrace ();} prS%lg>
catch(Exception e){e.printStackTrace ();} /Hk})o_ } Y{j~;G@Wl `/m]K~~ g5 *E\T%8 //读取保存的下载信息(文件指针位置) dY$nw private void read_nPos() HkRvcX
5 { M)K!!Jqh try{ D#'CRJh;7 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); $9\8?gS int nCount = input.readInt(); FDuA5At nStartPos = new long[nCount]; ][Tw^r& nEndPos = new long[nCount]; {nSgiqd"28 for(int i=0;i<nStartPos.length;i++) Bkq4V$D_ { oNXYBeu+ nStartPos = input.readLong(); $G0e1)D nEndPos = input.readLong(); %9zpPrWF } DmgDhNXKq input.close(); lv]U)p } $Xo_8SX, catch(IOException e){e.printStackTrace ();} FP{=b/ catch(Exception e){e.printStackTrace ();} MbYgGE,LA } AiR#:r 4mW$+lzn 81#x/&E] private void processErrorCode(int nErrorCode) ,O.iOT0=; { > Q=e9L= System.err.println("Error Code : " + nErrorCode); u=@zYA( } ]2"UR_x $U ._4 B_Gcz5 //停止文件下载 fGj66rMGw public void siteStop() Se[=$W { [%LGiCU] bStop = true; `@\FpV[|P for(int i=0;i<nStartPos.length;i++) ?-&k?I fileSplitterFetch.splitterStop(); ?7CdJgJp 2vUcSKG7 D3g5#.$,}> } G@D8[ }
(oiQ5s^f //负责部分文件的抓取 '#A_KHD **FileSplitterFetch.java 9BOn8p;yz */ p79QEIbk= package NetFox; (@T{ [\ 5R.jhYAj #%GBopv import java.io.*; kQ\l7xd import java.net.*; yAGQD[ih =?Co<972Z Q!-"5PX public class FileSplitterFetch extends Thread { yWc%z6dXC Pt-mLINvG :k_)Bh?+ String sURL; //File URL #Z]Cq0= long nStartPos; //File Snippet Start Position h3>u[cX% long nEndPos; //File Snippet End Position b't6ekkN int nThreadID; //Thread's ID :L:] 3L boolean bDownOver = false; //Downing is over \A!Iln boolean bStop = false; //Stop identical NmpNme FileAccessI fileAccessI = null; //File Access interface WB (?6" uUBUUr WM$Z?CN%KB public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 'YN:cr,V { fUq}dAs*K this.sURL = sURL; RigS1A\2l this.nStartPos = nStart; h+q#|N this.nEndPos = nEnd; (u8OTq@ nThreadID = id; Wvd-be fileAccessI = new FileAccessI(sName,nStartPos);//定位 nF3Sfw, } hn6'$P ~tNk\Kkv ~P!=fU) public void run() 9-A@2&J1 { o}wRgG while(nStartPos < nEndPos && !bStop) [D?xd/G { %PR,TWe e7Gb7c~ 9*"K+t: try{ Q.8^F URL url = new URL(sURL); mT j HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); qncZpXw^ httpConnection.setRequestProperty("User-Agent","NetFox"); us8ce+ String sProperty = "bytes="+nStartPos+"-"; H-WNu+ httpConnection.setRequestProperty("RANGE",sProperty); l) KN5V Utility.log(sProperty); dj,lbUL 3uvl'1(%J rP6k} InputStream input = httpConnection.getInputStream(); f~jdN~ //logResponseHead(httpConnection); s!Id55R] 3!?QQT,!) x )q$.u+ byte[] b = new byte[1024]; ~Wm'~y> int nRead; g*9&3ov while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 8z&/{:Z@pH { Br$/hn= nStartPos += fileAccessI.write(b,0,nRead); '/ueY#eG //if(nThreadID == 1) +~
S7]AZ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); |CS&H2!s } zZ<~yi3A9 *D7oHwDU D*HK[_5 Utility.log("Thread " + nThreadID + " is over!"); )B@&q.2B= bDownOver = true; 2<2a3'pG //nPos = fileAccessI.write (b,0,nRead); Np~qtR } hL;??h,!_ catch(Exception e){e.printStackTrace ();} k[1[Y{n. } zb9vUxN [ } k'[\r>T hB:+_[=Kj. K^I$05idi //打印回应的头信息 )gR3S%Ju public void logResponseHead(HttpURLConnection con) dt>!=<|k { Z%-uyT@a for(int i=1;;i++) 6|Rj
YX { w'5W L String header=con.getHeaderFieldKey(i); ?GZ?HK| if(header!=null) b DF_ //responseHeaders.put(header,httpConnection.getHeaderField(header)); Oo\~'I Utility.log(header+" : "+con.getHeaderField(header)); giN(wPgYP else LR17ilaa' break; +hWeN&A } xJvalb } wz'in B)-P#,} R?*-ZI[>w public void splitterStop() %#]/]B/4 { ?H!X
p bStop = true; 6>EoU-YX}l } :~,akX$ OBP iLCq *41WZ E } 5bWy=Xk
B {\=NZ\ r2Q) Q /* }M\G **FileAccess.java wK%x|%R[ *//文件访问(定位,写) AWmJm) package NetFox; A<g5:\3 import java.io.*; rHtX4;f+>< +d6Jrd* lU3Xd_v
O public class FileAccessI implements Serializable{ D
<Fl7QAb o\yqf:V8 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 kZ
9n@($B RandomAccessFile oSavedFile; SR\$ fmo long nPos; Fg^zz*e [
**F %{P." ki public FileAccessI() throws IOException -| t|w:& { @]{:juD~ this("",0); tbi(e49S } gem+$TFq n<sA?T h1?.x public FileAccessI(String sName,long nPos) throws IOException -IS?8\Q< { TGPHjSZ1 oSavedFile = new RandomAccessFile(sName,"rw"); 7o M]qLF this.nPos = nPos; EY!P"u; oSavedFile.seek(nPos); $%J$ } Vg"Ze[dA
V P4ToYc i>rsq[l public synchronized int write(byte[] b,int nStart,int nLen) ;
>>/}Jw\ { P,Rqv)}X int n = -1; mZ
t: try{ C;!h4l7L oSavedFile.write(b,nStart,nLen); =}4lx^`oeT n = nLen; l'Z `%}R } mc5$-}1V, catch(IOException e) @Cd}1OT) { kC6s_k e.printStackTrace (); 27jZ~Bp$ } L`Q9-#Y d`Em)3v "LH* T return n; Fqp~1>wi } \A3yM{G~+ 8uhB&qxB WN?meZ/N/ } i(>v~T,( Z$a4@W9o z15QFVm /* O0<GFL$)& **SiteInfoBean.java QJ-?67_i */ !J@pox-t package NetFox; `<l|XPv ,TxZ:f`" uv
dx>5] public class SiteInfoBean { A&fh0E (t c)o[3o7 ]^\+B4 private String sSiteURL; //Site's URL $JXQn private String sFilePath; //Saved File's Path mJ5LRpXN private String sFileName; //Saved File's Name h?:Y\DlU' private int nSplitter; //Count of Splited Downloading File pNzGpCk 7QkAr ,s1n!@9 public SiteInfoBean() ui6B {//nSplitter的缺省值为5 r\66]u[ //default value of nSplitter is 5 ?|9$o/Q} this("","","",5); /L"&'~ } ;42D+q=s ;w}5:3+ w]0jq
U6 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) gBG.3\[ { S\UM0G}v sSiteURL= sURL; +nslS:( sFilePath = sPath; I2=Kq{ sFileName = sName; R OQIw this.nSplitter = nSpiltter; QcQ|,lA.HI ;EfMTI}6K KPA5 X] } MXhRnVz"W B1Iq:5nmoS {N,w5!cP public String getSSiteURL() uy;3s=03^ { D r $N{d return sSiteURL; 5OUe|mS } {\e wf_pFk g)iSC?H !f\6=Z?>3 public void setSSiteURL(String value) DEC,oX!bI1 { yMa5?]J sSiteURL = value; _?2xIo } t hDE
1h ~dwl7Qc Q$9`QY*6"p public String getSFilePath() b\\?aR
| { vu.f B4 return sFilePath; Ic/<jFZXM } JhDjY8?86 ;mb
6i_ |E]YP~h public void setSFilePath(String value) 7_/.a9$G { &[KFCn sFilePath = value; -}juj;IVv } GO wd=]e S["
&8Fy i9)y| public String getSFileName() <s#}`R.#2 { ;@d<* return sFileName; ZdHWSfO)O } 5y"yd6O]O5 MJXm7<( ix&hsNzD public void setSFileName(String value) ?I 1@:?Qi { }Gz"og*8 sFileName = value; 5J&n<M0G1 } TCF[iE{ uj/le0 ZcO!cR&*'J public int getNSplitter() hoeTJ/;dm { <ZrZSt+< return nSplitter; +V8yv-/{ } 3P6!j "5jZS6A] sinG $= public void setNSplitter(int nCount) nhCB])u8l { IW1]H~1w nSplitter = nCount; ,?#-1uIGL> } +dh]k=6 } y_QxJ~6t 1=(i{D~ |$b 4{ /* I(
y
Wct **Utility.java l1wxs@]( */ Il;'s package NetFox; Z gU;=. s/To|9D FJL9x,%6 public class Utility { sfrh+o57 6y5arP*6e {2:H`|x public Utility() %r!# { H[Pb Wy: puqH%m+u >LU*F|F]B } [bOy,^@4 >PGm} s_ //线程睡眠 |_=jXf\TL public static void sleep(int nSecond) zPkg3H { !s)$_tG try{ X}usyO'pW Thread.sleep(nSecond); n`:l`n>N$ } "?9fL#8f*! catch(Exception e) &&<^wtznO { !J6s^um e.printStackTrace (); CWN=6(y } Y+=@5+G } (wY%$kW4 gCm?nb) //日志 Xs`:XATb/ public static void log(String sMsg) ev guw*u { yauP j&^R System.err.println(sMsg); 462ae`
6l } *r%mqAx( <s7{6n') g<dCUIbcQ public static void log(int sMsg) ~!nd'{{9 { b{dzbmak System.err.println(sMsg); OVh/t#On } Uq+
_#{2( } m5x>._7le <NAR'{f BA>0
+ /* Q)}\4&4 **TestMethod.java n[WeN NU */ 0F~9t! package NetFox; :<v$vER,& q9!#S 4*,q1yK public class TestMethod { x> q3w# B 0Its;| +8Px` v1L public TestMethod() q7PRJX { ///xx/weblogic60b2_win.exe Z{CL! try{ jI V? p SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); zg
j35 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); z$V8<&q SiteFileFetch fileFetch = new SiteFileFetch(bean); O``MUb b fileFetch.start(); ?7p|
F^ } i|O7nB@ catch(Exception e){e.printStackTrace ();} A_fU7'B /uc/x+(_ w${=dW@K } $^XPk#$m !?>)[@2
k6 Zll^tF# public static void main(String[] args) UKBMGzu2: { %Uk/P new TestMethod(); .0-m=3mp2 } 3d<HIG^W} } Xda<TX@- 点击下载更多相关资料
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