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/* =K:[26 **SiteFileFetch.java N[cIr{XBGN */ {YiMd
oMhg package NetFox; jj`#;Y import java.io.*; N}5 import java.net.*; d}O\:\}y 2WS*c7Ct &h/r]KrZ public class SiteFileFetch extends Thread { {z>!Fw $6n
J+ My>q%lF=fw SiteInfoBean siteInfoBean = null; //文件信息Bean bpc1>? long[] nStartPos; //开始位置 8oE`>Y long[] nEndPos; //结束位置 J!om"h FileSplitterFetch[] fileSplitterFetch; //子线程对象 sV#%U%un long nFileLength; //文件长度 5$ik|e^:y boolean bFirst = true; //是否第一次取文件 u4hn9**a1 boolean bStop = false; //停止标志 o%'1=d3R1Q File tmpFile; //文件下载的临时信息 YXp\C"~g DataOutputStream output; //输出到文件的输出流 vN(~}gOd\ G/JGb2I/7| //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) uBts?02 public SiteFileFetch(SiteInfoBean bean) throws IOException bkdXBCBx? { 5ih>x3S1/ siteInfoBean = bean; ~B[e*|d //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 6c!F%xU} tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); #H7
SLQr\ if(tmpFile.exists ()) JLm3qIC { Dspvc bFirst = false; Pyuul4( read_nPos(); )<HvIr(xr } = 9Yfo,F else lZAGoR;0Ra { v(;yy{>8" nStartPos = new long[bean.getNSplitter()]; ]?]M5rP nEndPos = new long[bean.getNSplitter()]; Z=8&` } ,<Cl^ ^a, -,/7u3 0y|1@CS ';G/,wB?` } 4AL,=C3 PV\J]
|d,% ~0,v Q
public void run() At@0G\^ { |"K%Tvxe //获得文件长度 Do(G;D`h+_ //分割文件 ,~cK]!:>s //实例FileSplitterFetch 1)c{;x&W //启动FileSplitterFetch线程 \SmsS^z(] //等待子线程返回 WT\wV\Pu try{ mW]dhY 3X if(bFirst) X_'tgP9 { 6{;6~?U nFileLength = getFileSize(); GDCp@%xW if(nFileLength == -1) ;#zteqn
{ %( OP
[ System.err.println("File Length is not known!"); n=j)M } FV9{u[3m else if(nFileLength == -2) X[Iy6qt { D 6'd&U{_ System.err.println("File is not access!"); Vsi:O7|+
} } u)h
{"pP else 1^^{;R7N { jS]Saqd for(int i=0;i<nStartPos.length;i++) h<LS`$PK;E { Zsapu1HoL\ nStartPos = (long)(i*(nFileLength/nStartPos.length)); 97 SS0J } 5@l5exuG*m for(int i=0;i<nEndPos.length-1;i++) {$EX :ID { s2L]H nEndPos = nStartPos[i+1]; 5 v.&|[\k } nY MtK nEndPos[nEndPos.length-1] = nFileLength; ]+`K\G ^X } TNh&g. } V^tD@N T x
Mh_ J8\l'}?& //启动子线程 Z5'^Hj1, fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; a4uy}@9z for(int i=0;i<nStartPos.length;i++) :V6
[_VaF { Up%XBA fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), _t,aPowX siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Ngx2N<$<*g nStartPos,nEndPos,i); qy?$t:*pp Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); q/:]+ fileSplitterFetch.start(); rbOJ;CK } j8M t"B // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `~\SQ EY$ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); dlyGgaV*X // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", kT
nEndPos = " + nFileLength); rZ,3:x-: // fileSplitterFetch[nPos.length-1].start(); Uy=yA >7@,,~3 YCP D+ //等待子线程结束 #<Y3*^~5d //int count = 0; CSjd&G*ZB //是否结束while循环 3_G0eIE"u boolean breakWhile = false; Ma\%uEgTD 5Kd"W, 5vD\?,f E while(!bStop) h)sT37 { 'r=2f6G>cP write_nPos(); vg?(0Gasm* Utility.sleep(500); 6{d?3Jk breakWhile = true; f\?Rhyz :!Z |_y{b FLJ&ZU=s for(int i=0;i<nStartPos.length;i++) ~c&sr5E { prM)t8SE if(!fileSplitterFetch.bDownOver) \aPH_sf, { w8S
pt breakWhile = false; ,y"vf^BE. break; +EA ")T<l } A]Hz?i } y)LX?d if(breakWhile) _GY2|x2c break; cb'Ya_ s8:epcL`A pno}`Cer //count++; ]~$@x=p2e //if(count>4) 1
39T*0C // siteStop(); k ]gPMhe } p".wqg*W q%k&O9C2] ;*K;)C System.err.println("文件下载结束!"); XU<owk } C &@'oLr catch(Exception e){e.printStackTrace ();} 1LFad>` } D',7 T=C
yS
K81` IW@xT@ //获得文件长度 *:\[;69[ public long getFileSize() 8S#&XS>o { nQ'NS int nFileLength = -1; sBWyUD try{ Qd~7OH4Lp URL url = new URL(siteInfoBean.getSSiteURL()); %qJgtu"8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q u/f>tJN; httpConnection.setRequestProperty("User-Agent","NetFox"); r9-ayp#pC $EIKi'!8 N:'GNMu int responseCode=httpConnection.getResponseCode(); YG?4DF if(responseCode>=400) &B:L9^ { rpEIDhHv processErrorCode(responseCode); 2T%sHp~qt return -2; //-2 represent access is error [ZG>FJDl8 } |0p@'X1 RwK6u-u#9 o=7e8l String sHeader; H{_D#It 5`}za- &RuTq6)r for(int i=1;;i++) GGLSmfb) { ,|8aDL? //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); irw5<l //Utility.log(in.readLine()); 3XUVUd~ sHeader=httpConnection.getHeaderFieldKey(i); Xsn M} if(sHeader!=null) ]ZR`
6|"VO { c#u_%* if(sHeader.equals("Content-Length")) * >2FcoN; { {]|<|vc;GI nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); V]]!0ugvk( break; uZf
6W<a } O.Te"=^"F } 19% "F!^i else s 7%iuP break; P1L+Vnfu } D@5h$m5 } w|I5x}ZFG catch(IOException e){e.printStackTrace ();} c#?~1@= catch(Exception e){e.printStackTrace ();} 1H%p|'FKA %H_-`A` >^W6'Q$P< Utility.log(nFileLength); vEG7A$Z" fGH)Fgo` zZ Y1E@~ return nFileLength; @b2?BSdUp } 1Xh@x T.QJ#vKO0 $\k)Y(& //保存下载信息(文件指针位置) K}n.k[Do private void write_nPos() ~[aV\r? { U7fNA7#x" try{ O\oRM2^u} output = new DataOutputStream(new FileOutputStream(tmpFile)); dA2@PKK output.writeInt(nStartPos.length); [".94(qs for(int i=0;i<nStartPos.length;i++)
5Uhxl^c { GaJE(N // output.writeLong(nPos); VqD_FS;E output.writeLong(fileSplitterFetch.nStartPos); ]4')H;'y output.writeLong(fileSplitterFetch.nEndPos); RV]QVA*i } $6ucz' output.close(); EHl~y=9 } b{<$OVc catch(IOException e){e.printStackTrace ();} MkdC*| catch(Exception e){e.printStackTrace ();} \Lb wfd= } t\2-7Ohj6 wmMn1q0F Mc8_D,7 //读取保存的下载信息(文件指针位置) 2cS94h private void read_nPos() TZn5s~t { G&Yo2aADR try{ xVI"sBUu DataInputStream input = new DataInputStream(new FileInputStream(tmpFile));
DHhty qm int nCount = input.readInt(); ^?q(fK% nStartPos = new long[nCount]; .R4,fCN nEndPos = new long[nCount]; TR
`C|TV> for(int i=0;i<nStartPos.length;i++) bF;|0X$
x { { /8s`m nStartPos = input.readLong(); 'm<L}d nEndPos = input.readLong(); ]A+t@/k } EronNtu8i input.close(); QiqRx } SN}3 catch(IOException e){e.printStackTrace ();} Xrc{wDn catch(Exception e){e.printStackTrace ();} wT3D9N. } 1Qjc*+JzO. vUL@i'0&o S@
y! 0, private void processErrorCode(int nErrorCode) )Fqtb;W= { _ Fk^lDI- System.err.println("Error Code : " + nErrorCode); YOfYa } 6/'X$}X b;vVlIG Dl\0xcE //停止文件下载 1?"Zrd public void siteStop() _S*QIbO { hr&UD| E= bStop = true; m<;MOS for(int i=0;i<nStartPos.length;i++) ^4[QX
-_2 fileSplitterFetch.splitterStop(); ~dgFr6 5YUe>P D Mx3f T>? } U`{ M1@$ } !af;5F //负责部分文件的抓取 {)kL7>u]^V **FileSplitterFetch.java :a=]<_*x */ Ir-
1@_1Q package NetFox; )5x$J01S fkk9&QB%( iP9Dr<P import java.io.*; XCez5Q1 import java.net.*; Xz/aytp~A R$it`0D4o hO$29_^" public class FileSplitterFetch extends Thread { ,d
HAD "HJQAy?W
f7%g=0.F String sURL; //File URL ^Y8G}Z| long nStartPos; //File Snippet Start Position ;ae6h
[ long nEndPos; //File Snippet End Position ^R+CkF4l l int nThreadID; //Thread's ID !_dW
` boolean bDownOver = false; //Downing is over {=Py|N\\t boolean bStop = false; //Stop identical e)L!4Y44K FileAccessI fileAccessI = null; //File Access interface "`pg+t& zR=g<e1xe f8f|'v| public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ,yfJjV*I { JmBMc}54 this.sURL = sURL; xKT;1(Mk this.nStartPos = nStart; :X 1Y this.nEndPos = nEnd; N>@.(f&w nThreadID = id; +\vN#xDz fileAccessI = new FileAccessI(sName,nStartPos);//定位 cvpZF5mL]U } (5 RZLRn &k(tDP )1)&fN41i# public void run() f\:I1y { Z#GR)jb+ while(nStartPos < nEndPos && !bStop) L'"od;(6R { 1@+&6UC ?.MlP,/K $7Tj<;TV try{
@3I?T
Q1 URL url = new URL(sURL); 9q^7%b, HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /sSif0I24 httpConnection.setRequestProperty("User-Agent","NetFox"); C+C1(b;1 String sProperty = "bytes="+nStartPos+"-"; e.|t12)L " httpConnection.setRequestProperty("RANGE",sProperty); E/d\ebX| Utility.log(sProperty); `K2vG`c fKs3H?| uBaGOW|Pl InputStream input = httpConnection.getInputStream(); D]V&1n //logResponseHead(httpConnection); #hEU)G'$+ $BOIa <1U *{y byte[] b = new byte[1024]; hg `N`O int nRead; ,nw5 M.D_ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ]/mRMm9"3h { 6x@]b>W nStartPos += fileAccessI.write(b,0,nRead); 368H6 Jj //if(nThreadID == 1)
Bf,}mCq // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); gdqED}v } t.7_7`bin~ tkHUX!Ow; EOGz;:b& Utility.log("Thread " + nThreadID + " is over!"); y8|}bd<Sr bDownOver = true; iz`ys.Fu //nPos = fileAccessI.write (b,0,nRead); ?bG82@- } :O*62olC5 catch(Exception e){e.printStackTrace ();} uD`Z\@Z } hnv0Loe.IW } H|cxy?iJ G?+]BIiL mldY/;-H!1 //打印回应的头信息 G;AV~1i:~ public void logResponseHead(HttpURLConnection con) !j0iLYo(* { *x. gPG for(int i=1;;i++) v;"
pc)i { c{/KkmI String header=con.getHeaderFieldKey(i); ;:Y/"5h if(header!=null) k%LsjN.S //responseHeaders.put(header,httpConnection.getHeaderField(header)); NB&zBJ# Utility.log(header+" : "+con.getHeaderField(header)); CyJZip else :-b-)*TC; break; R9Y{kk0M } S`[r]msw } d 4; 42
rIIJ1A R)GDsgXy public void splitterStop() < 'r<MA< { X*M-- *0q' bStop = true; j1dz'G}hj } w8-L2)Q}I l37l| xp~ ,,Vuvn } Ozc9y y!% 8j@ADfZ9 GF*E+/
; /* HK.Si]: **FileAccess.java 7+J<N@.d *//文件访问(定位,写) I]N!cEr;@- package NetFox; '\LU 8VC import java.io.*; pR~"p#Y Ns[.guWu- elb}]
+ public class FileAccessI implements Serializable{ qo}u(pOj| 5{M$m&$1 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 8t&'Yk RandomAccessFile oSavedFile; l8N5}!N long nPos; x>[ gShAV! 9CHn6 v ~) P6 mDwR public FileAccessI() throws IOException
1);E!D[ { G)7J$4R this("",0); 2}#VB;B } `>{S?t< yTU'voE.| wW'.bqA public FileAccessI(String sName,long nPos) throws IOException -.7UpDg~ { <D(|}5qR oSavedFile = new RandomAccessFile(sName,"rw"); ~fly6j|u this.nPos = nPos; L(kW] oSavedFile.seek(nPos); cN#f$ } 9B1bq # x/#.%Ga#T !Ka~X!+\ public synchronized int write(byte[] b,int nStart,int nLen) eLop}*k { .+ CMm5T int n = -1; <+;
cgF!+ try{ VI^~I;M^ oSavedFile.write(b,nStart,nLen); -<q@0IYyi n = nLen; $
4A!Y } {Gr"oO`&" catch(IOException e) V?z-Dt C { ]4&B*]j e.printStackTrace (); A,GJ6qp3 } yI*h"?7T
qyYf&VC} G)y'ex k return n; (I(k$g[> } Y@V6/D} 1
B*Q C=PV-Ul+ } +Ram%"Zwh /Oa.@53tK6 '5SO3/{b /* %Z#[{yuFs **SiteInfoBean.java D$bJ s O */ <e' l"3+9( package NetFox; SrSm%Dv yg@}j %Wb$qpa public class SiteInfoBean { / ,
.rUn1 x\6 i (k- ^VlPnx8y= private String sSiteURL; //Site's URL 'd|E>8fejG private String sFilePath; //Saved File's Path <=!|U0YV
private String sFileName; //Saved File's Name ?nx
1{2[ private int nSplitter; //Count of Splited Downloading File Q02:qn?T #+PfrS= 82Nw6om6i public SiteInfoBean() .1?7)k
v {//nSplitter的缺省值为5 <<9Y=%C+ //default value of nSplitter is 5 3 p9LVa this("","","",5); oJ)v6"j } rZ7)sE5L 3`Q>s;DjIU ),+u>Os& public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) kn7Qvk[+ { e!*%U=[Q sSiteURL= sURL; u:O6MO9^ sFilePath = sPath; jj"?#`cW sFileName = sName; E 5bo60z this.nSplitter = nSpiltter; Z~Z+Yt;,9a Rk52K*Dc >dqeGM7Np> } Kkz2N ;Ajy54}7 Ol.
rjz9 public String getSSiteURL() e.^Y4( { $;%dQ!7* return sSiteURL; QCk(qlN'h9 } Z8 _QKw> f@= lK?Pfh IpMZ{kJlv` public void setSSiteURL(String value) _7 9 ?,U] { ^5![tTJ sSiteURL = value; #o-CG PE } VNLggeX'U n`)wD~mk h ^6Yjy public String getSFilePath() 2VNfnk { 66~]7w return sFilePath; Dhe ]f#d } Lg4I6 G ym)`<[T Z
]WA-Q6n public void setSFilePath(String value)
Sk,9<@ { 8q&*tpE sFilePath = value; 2Md'<. } IKV:J9 6M758K6v spt='!)4 public String getSFileName() (">gLr { "ZyWU f return sFileName; ~h*p A8^L } xiPP&$mg `L=$,7` S4Vv _k-&
public void setSFileName(String value) sZhl.[&zo { l6Q75i)eF sFileName = value; #GHLF } :+>:>$ao Z"fnjH 2x*C1
public int getNSplitter() 2<@27C5 { s GP}>w-JZ return nSplitter; 1y5$ } h}_1cev? ;Q =EI%_tv 9v<Sng public void setNSplitter(int nCount) jHx<}< { :i6k6= nSplitter = nCount; -cHX3UAEI } ?geEq' } O$=) mJ|7Jc H19CVc\B /* 97um7n **Utility.java 5PQs1B */ [af<FQ { package NetFox; emV@kN. #?z1cgCg L_rKVoKjt public class Utility { a,U =irBA t*)-p:29h X=p~`Ar M{ public Utility() -R;.Md_ { q#RVi8(' WqC6c&NM }hFjl4`xa } o?J>mpC ZC1U //线程睡眠 z.[ Ok public static void sleep(int nSecond) m
dC.M$ { ntSPHK|' try{ F=hfbCF5x Thread.sleep(nSecond); 8F<Qc*' } imtW[ y+4 catch(Exception e) oWpy^=D_ { ,diV;d e.printStackTrace (); BV&}(9z } LTY@}o]\U } >Tld: 0=8.8LnN( //日志 F^=|NlU&% public static void log(String sMsg) ]*^mT&$7 { P$)9osr System.err.println(sMsg); |Js96>B: } [j5^Zb&0 V&_5q`L %xR;8IO public static void log(int sMsg) 3Lq?Y7#KQp { `\&qk)ZP System.err.println(sMsg); XQk9 U } &,fBg6A% } Z$,1Tk"O/s dox QS ohS "$#x+|PyC /* -{ZTp8P> **TestMethod.java AdB5D_ Ir */ .l*]W!L] package NetFox; j~"X`: = 6yF4%Sz9 "_C^Bc public class TestMethod { yi7-[W} nrA}36 E -)?~5Z public TestMethod() u9>.x
zYG { ///xx/weblogic60b2_win.exe "wxs try{ q]5"V>D \ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); FI~)ZhE)] //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); QHsS|\u SiteFileFetch fileFetch = new SiteFileFetch(bean); jjz<V(Sk fileFetch.start(); "31GC7 } ^$_a_ft# catch(Exception e){e.printStackTrace ();} 9\Mesf1$o FQ?H%UcW xN}P0 } 0pu])[P]_[ -2tX 15, R6)p4#|i public static void main(String[] args) $RKd@5XP { c?eV8h1G new TestMethod(); \GbT^!dj } m{x!uq } >lyUr*4PX 点击下载更多相关资料
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