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/* 0s%{m< **SiteFileFetch.java +JFE\>O */ _H2%6t/V package NetFox; 9[\$\l import java.io.*; Q
S.w#"X[ import java.net.*; ^w}BXVn UbwD2> 0_map z public class SiteFileFetch extends Thread { <m?/yREK2 z6Yx
)qBE< ];}7
%3 SiteInfoBean siteInfoBean = null; //文件信息Bean #J
c)v0_ long[] nStartPos; //开始位置 pB]+c%\ long[] nEndPos; //结束位置 -+|{#cz FileSplitterFetch[] fileSplitterFetch; //子线程对象 '%A*Z,f long nFileLength; //文件长度 V)r6bb{^ boolean bFirst = true; //是否第一次取文件 %?:eURQ boolean bStop = false; //停止标志 =g^JJpS File tmpFile; //文件下载的临时信息 {B6tGLt#bf DataOutputStream output; //输出到文件的输出流 `OyYo^+D|. Rwz (20n\^ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Q(YQ$i"S public SiteFileFetch(SiteInfoBean bean) throws IOException 2Yd;#i) { {{4Sgb siteInfoBean = bean; {W# VUB //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); #]o#~:S= tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Jro%zZle if(tmpFile.exists ()) -u'BK@; { V IU4QEW`x bFirst = false; )eSD5hOI) read_nPos(); .3T#:Hl } tJY3k$YX else lMBXD?,,J { _NJq%-,' nStartPos = new long[bean.getNSplitter()]; .
!;K5U nEndPos = new long[bean.getNSplitter()]; !"x&tF } +~\c1|f IOOAaa @( A 4|a{\|$ HOAgRhzE } nqyB,vv0 H#j Z'I vwQ6= public void run() q--;5"=S { 2r&T. //获得文件长度 ;v1&Rs //分割文件 6>B_ojj: //实例FileSplitterFetch |;_uN q9 //启动FileSplitterFetch线程 okZDxg`6 //等待子线程返回 6o/!H try{ dg]: JU if(bFirst) rYMHc@a9( { +gOv5Eno- nFileLength = getFileSize(); :CAbGs:56 if(nFileLength == -1) ep2#a#&' { t<2B3&o1 System.err.println("File Length is not known!"); eE-@dU? } $]yHk
else if(nFileLength == -2) #!X4\+) { }EZd=_kAq~ System.err.println("File is not access!"); 9nPc>O$ } ^.@BD4/RPt else hzjEO2 { 2aUy1*aM for(int i=0;i<nStartPos.length;i++) YAf`Fnmw { x7]Yn'^' nStartPos = (long)(i*(nFileLength/nStartPos.length)); &*#- %<=1 } !
uyC$8V*l for(int i=0;i<nEndPos.length-1;i++) AGxG*KuZ { #2023Zo] nEndPos = nStartPos[i+1]; wfxg@<WR } Z>H
y+Q4 nEndPos[nEndPos.length-1] = nFileLength; dLMKfh/4Q } 2,X~a;+ } eD481r L(2KC>GvA }XiV$[xHd //启动子线程 .UuCTH;6` fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; u/BCl!` for(int i=0;i<nStartPos.length;i++) }vbs6u { hs"=>(P) fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), o4"7i 9+g siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), sSMcF[]@2I nStartPos,nEndPos,i); }QL 2#R Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8&"@6/)[ fileSplitterFetch.start(); WU
-_Y^ } 75LIQ!G|= // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /i#~#Bn| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); f|f9[h' // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", |h; _r& nEndPos = " + nFileLength); 67/&.d! // fileSplitterFetch[nPos.length-1].start(); g=
ql 3N !V6O~# DhwFD8tT //等待子线程结束 <QyJJQM //int count = 0; :!h1S`wS //是否结束while循环 ;9r `P_r boolean breakWhile = false; aD1G\*AFJ 0OndSa, VE<&0d< while(!bStop) y%21`y&Os { +d0&(b write_nPos(); &ESE?{of) Utility.sleep(500); ^nYS@ breakWhile = true; G02(dj H\\0V.}! S(c ,Sinc for(int i=0;i<nStartPos.length;i++) s\6kXR { ]F5qXF5 if(!fileSplitterFetch.bDownOver) q#$4Kt; { 3:f<cy
breakWhile = false; 3JiJ,<,7 break; ~@x@uY$5 } %8 )GuxG* } tTT./-*0 if(breakWhile) )pS1yYLj break; 4 |ryt4B =#AeOqs( q cvR|qHNX //count++; P| o_/BS //if(count>4) Lzzf`jN] // siteStop(); ;hz"`{(JY } m/)Wn }vRs n-E@ >bia
FK>t System.err.println("文件下载结束!"); xHv<pza: } 'J (4arN catch(Exception e){e.printStackTrace ();} jJc?/1 jv } HG2i^y =y; tOdj mX)UoiXue //获得文件长度 VuDSjh public long getFileSize() Kf<-PA { X&1R6O int nFileLength = -1; -'FzH?q: try{ .u3!%{/v(c URL url = new URL(siteInfoBean.getSSiteURL()); wz-9+VN6 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0f).F httpConnection.setRequestProperty("User-Agent","NetFox"); OXy>Tlv 36154*q N#-P}\Q9 int responseCode=httpConnection.getResponseCode(); ;?>xuC$ if(responseCode>=400) +1j@n.)ft { [-)N}rL> processErrorCode(responseCode); (Yz EsY return -2; //-2 represent access is error `p@YV( } ~yH<,e *~F\k):> tN&x6O+@ String sHeader; 3%?01$k %(GWR@mfC ?\dY! for(int i=1;;i++) ?lJm}0> { - Dm/7Sxd` //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 7q>WO //Utility.log(in.readLine()); HhN;&67~Z sHeader=httpConnection.getHeaderFieldKey(i); .'md `@t if(sHeader!=null) p/|]])2 { ozZW7dveU if(sHeader.equals("Content-Length")) $=7[.z& { /
AFn8=9'^ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 58"Cn ||tF break; ]de'v } e"u=4nk } WQ/H8rOs else {=WTAgP break; &?m|PK) I } 9NTBdo%u } CO e"te catch(IOException e){e.printStackTrace ();} C%ibIcm y catch(Exception e){e.printStackTrace ();} Az29?|e 5?+ECxPt /; ;_l2 t Utility.log(nFileLength);
h:iK; hnM?wn 1b:3'E.#w return nFileLength; vA rM.Bu>b } jm1f,=R 6eSc`t& 8_8r{a<xW //保存下载信息(文件指针位置) 8X":,s! private void write_nPos() ;Wa4d`K { xSFY8 try{ VG*Tdaua~ output = new DataOutputStream(new FileOutputStream(tmpFile)); C~PrIM? output.writeInt(nStartPos.length); lf4V;|!^ for(int i=0;i<nStartPos.length;i++) 4,CQJ { w]b3,b // output.writeLong(nPos); ~1&%,$fZ output.writeLong(fileSplitterFetch.nStartPos); 1|)l6#hOL output.writeLong(fileSplitterFetch.nEndPos); m6J7)Wp } &kKopJH output.close(); >U\,(VB } ^&oa\7<' catch(IOException e){e.printStackTrace ();} |QwX catch(Exception e){e.printStackTrace ();} cd1M0z } +}H2|vP j4j %r( s`W\`w} //读取保存的下载信息(文件指针位置) hGmJG,H private void read_nPos() XXsN)2 { *-~B{2b< try{ aIV(&7KT4 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 07WZ w1(; int nCount = input.readInt(); a+!#cQl nStartPos = new long[nCount]; x/*ndH nEndPos = new long[nCount]; T|o[! @:, for(int i=0;i<nStartPos.length;i++) +b_g,RNs! { 7=yC*]BH-= nStartPos = input.readLong(); @/i;/$\ nEndPos = input.readLong(); %N 8/g]`7 } hA1\+r input.close(); o<@b]ukl& } #L[-WC]1y catch(IOException e){e.printStackTrace ();} 0PIiG-o9 catch(Exception e){e.printStackTrace ();} f`w$KVZ1!w } EgO=7?(pW Hn"xn79nc __HPwOCG7 private void processErrorCode(int nErrorCode) e;KZTH; { s[h& Uv"G System.err.println("Error Code : " + nErrorCode); F(*~[*Ff } 9U1cH qV MxMrLiqU6l *sI`+4h[ //停止文件下载 5~Vra@iab: public void siteStop() 0{bGVLp { ssVO+
T bStop = true; Qhlgu! for(int i=0;i<nStartPos.length;i++)
,L ;ueAo fileSplitterFetch.splitterStop(); 'V";"Ei j)IXe 0dMC '"C$E922 } xE(VyyR } q{/>hvl //负责部分文件的抓取 v'Y)~Kv@! **FileSplitterFetch.java pE{ZWW[@+ */ ,H!E :k package NetFox; L~N<<8?\ ]O
Nf;RH L}O_1+b import java.io.*; t}LV[bj1u import java.net.*; 2\h]*x%: rZ<n0w S;DqM;Q public class FileSplitterFetch extends Thread { )-$Od2u2c 9-)D"ZhLe ]k~k6#),; String sURL; //File URL GtcY){7 long nStartPos; //File Snippet Start Position VfAC&3%M long nEndPos; //File Snippet End Position r )8[LN- int nThreadID; //Thread's ID `I+G7KK boolean bDownOver = false; //Downing is over 3=w$1.B d boolean bStop = false; //Stop identical vZj:\geV FileAccessI fileAccessI = null; //File Access interface
'PW~4f/m (S/f!Dk&3 h$[}lZDg public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException NoS|lT { g.yr)
LHt0 this.sURL = sURL; K3jKOV8 this.nStartPos = nStart; ] h3~>8< this.nEndPos = nEnd; ,$irJz F nThreadID = id; rlSar$ fileAccessI = new FileAccessI(sName,nStartPos);//定位 JR/:XYS+ } b4`t, D Ara D_D @]r,cPx0Y public void run() H8d%_jCr { n}?XFx!% while(nStartPos < nEndPos && !bStop) ~"eos~AuW { ZMO7o 1" qW8sJ= h3rdqx1 try{ ^2-2Jz@ URL url = new URL(sURL); 5~&9/ALk5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 61e)SIRz9I httpConnection.setRequestProperty("User-Agent","NetFox"); PCzC8~t String sProperty = "bytes="+nStartPos+"-"; [DS.@97n httpConnection.setRequestProperty("RANGE",sProperty); * SH5p Utility.log(sProperty); Ua^#.K hl`4_`3y L{H`
t{A InputStream input = httpConnection.getInputStream(); qN h:;` //logResponseHead(httpConnection); },9Hq~TA Y r6wYs(% y8"8QH byte[] b = new byte[1024]; pR6mSfer int nRead; 9?"]dEM while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) "
`rkp= {
Q)eYJP=W nStartPos += fileAccessI.write(b,0,nRead); 'p3JYRT$ //if(nThreadID == 1) R5M/Ho 4 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); $X1T!i[.X } 8Jnb/A} 5 [{l9 &%M!!28X: Utility.log("Thread " + nThreadID + " is over!"); ];& @T\Rj bDownOver = true; yhzC 9nTH //nPos = fileAccessI.write (b,0,nRead); .U.Knn } &''lOS| catch(Exception e){e.printStackTrace ();} (tQ#('(w } "G. L)oD } 9[yW&t;# $yG>=GN s;!TB6b@ //打印回应的头信息 ' S%?&4 public void logResponseHead(HttpURLConnection con) %M"rc4Xd { V$U#'G>m for(int i=1;;i++) om6'%nXhn { A")F7F31c String header=con.getHeaderFieldKey(i); W"j&':xD if(header!=null) JC|j*x(k/ //responseHeaders.put(header,httpConnection.getHeaderField(header)); wrw4Uxq Utility.log(header+" : "+con.getHeaderField(header)); +T]/4"^M else M7U:UV) break; BYj Eo } | Q0Wv8/ } qffVF|7 fTb&k;'LR< #mhR^60, public void splitterStop() 7lQ@I}i { NDsF<2A4 bStop = true; X2CpA;#;7l } ~mAv)JK vjNP WdQR^'b$ } A HnXN%m (^h2'uB qg_M9xJ /* 0hJ,l. **FileAccess.java N %;bV@A9 *//文件访问(定位,写) 44e:K5;]7 package NetFox; sa8Q1i&% import java.io.*; .%~m|t+Rt [ PXv8K%]p =3K}]3f public class FileAccessI implements Serializable{ ScN'|Ia.- &lnr?y^ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 jtS-nQ| RandomAccessFile oSavedFile; rQE:rVKVh long nPos; -zn$h$N4 SSCyq#dl$ c,
IAz public FileAccessI() throws IOException @\ udaZc { _JEe] this("",0); -@=As00Bg } _]oNbcbt( {,:yZ&( = Ob-'Syg> public FileAccessI(String sName,long nPos) throws IOException `i~kW { o8uak*"{ oSavedFile = new RandomAccessFile(sName,"rw"); iX]tL:,~i this.nPos = nPos; LN=6u oSavedFile.seek(nPos); *;E\,,Io } 8.`*O },eV?eGj mz-sazgV public synchronized int write(byte[] b,int nStart,int nLen) _!qi`A { :v$][jZ2 int n = -1; nF"NXYa try{ qcVmt1" oSavedFile.write(b,nStart,nLen); ;RR\ Hwix n = nLen; $p( } K9\r2w'T' catch(IOException e) >`E
(K X { &9j*Y e.printStackTrace (); g
\;,NW^ } SN#Cnu} o5h*sQ9 $?Dcp^ return n; J 2H$ALl } a_z1S Z2[ c_~tCKAZ kleE\8_ } |K.J@zW !-tP\%' (R^qY"H
2 /* = Z
/* **SiteInfoBean.java NflwmMJ */ E'g?44vyw package NetFox; .DrGr:UW Iz_#wO &x"hM public class SiteInfoBean { 6<t<hP_3O xI>HY9i) Q8h0:Q private String sSiteURL; //Site's URL q1Sr#h| private String sFilePath; //Saved File's Path dy"7Wl]hi7 private String sFileName; //Saved File's Name 9z'(4U private int nSplitter; //Count of Splited Downloading File F2)\%HR 52P^0<Wq qsG}A public SiteInfoBean() yd=NafPM {//nSplitter的缺省值为5 ]39])ul //default value of nSplitter is 5 <^n@q f} this("","","",5); wn Q% 'Eo } *KYh_i uY;7&Lw
y1 )u?^w public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) cgV5{|P { 1lLXu sSiteURL= sURL; -IE=?23Do? sFilePath = sPath; "2_nN]%u- sFileName = sName; %|(Cb!ySX this.nSplitter = nSpiltter; =38c}( wl Nl|+ K b O9PpOk+z } O*lMIWx HO}eu v"x'rx# public String getSSiteURL() F9J9zs*, { 0c
GjOl return sSiteURL; cv7.=*Kb; } rD!UP1Nb _m@+d>f_ ALi3JU public void setSSiteURL(String value) Iy;bzHXs { |'QgL0?
sSiteURL = value; DR<=C`<4( } Hd ${I", k vF[d{l W@t{pXwLv public String getSFilePath() 0RF<:9@x2 { fO{'$?K return sFilePath; 82P#C4c+d } $_+.D`vx` O_P8OA#| fX/k;0l public void setSFilePath(String value) QI4a@WB]ok { NOQSL T= sFilePath = value; 2PViY,V| } [&5%$ T {(5M)|> RD6`b_]o public String getSFileName() 83pXj=k< { |IZFWZd return sFileName; um=qT)/D } |>dqZ_)v H|8i|vbi GmdS~Fhp public void setSFileName(String value) ia*Bcx_RW+ { +i(;@%
kv sFileName = value; +kM*BCPYE } OE(!^"5?[ ."h>I @MH `{+aJ0<S public int getNSplitter() >U62vX" { qlg?'l$03) return nSplitter; ,3bAlc8D7 } qwvch^?>FQ u;/<uV3 KY9&Ky+2 B public void setNSplitter(int nCount) s-e<&*D[ { VI;)VJbq nSplitter = nCount; >mp"=Y } 5^e|802 } G]E-2 _t7 7NP
Ny mApl}I /* q/dja **Utility.java m<GJ1)%3i */ OcZ8:`=% package NetFox; deqL p77 q/3 )yG6s public class Utility { - %`iLu *:,y`!F=y _Bq [c public Utility() q:3HU< { ,7^,\ ,-m T`K4n U# mAuN* ( } ct@i]}"` ,_U3p , //线程睡眠 A>Xt 5vk+ public static void sleep(int nSecond) >OW>^%\!1 { .WpvDDUK3 try{ 11BfJvs: Thread.sleep(nSecond); oWcBQ| } ;0Mg\~T~' catch(Exception e) > m##JzWLr { NSDls@m e.printStackTrace (); l3;MjNB^V } ky{-NrK } DtOL=m]s w<G'gi] //日志
3vRBK?Q.y public static void log(String sMsg) t'DYT"3 { rRd8W}B System.err.println(sMsg); ['\u?m } PP!}w r|JZU RtScv public static void log(int sMsg) BV512+M { b(?A^a System.err.println(sMsg); +I_p\/J?w/ } S#f}mb0, } 8L,i}hIo. &J}w_BFww L7 g4' /* U=>4=gsG **TestMethod.java Z*M-PaU} */ sI#r3:?i package NetFox; TptXH? ="AJ&BqHd pb=yQ}. public class TestMethod { MP%pEUomev 07qL@![! W6L}T,epX public TestMethod() [y1
x`WOk9 { ///xx/weblogic60b2_win.exe _%6Vcy try{ d ~3GEK SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); N
Uq'96{Y //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); _do(
SiteFileFetch fileFetch = new SiteFileFetch(bean); <s(<ax30 fileFetch.start(); 2kQa3Pan } ;sfk@ec catch(Exception e){e.printStackTrace ();} @Yy']!Ju Yn1CU dT4e[4l } u<a =TPAU }5a$Ka- [SA$d`B/ public static void main(String[] args) >2@ a\ { iJem9XXb new TestMethod(); $][$ e } Q2HULz{ } {ZrB,yK 点击下载更多相关资料
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