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/* TZh\#dp4l **SiteFileFetch.java BH&/2tO% */ Bw3F7W~l package NetFox; p;qRm}
0} import java.io.*; gHi~nEH import java.net.*; m3xz=9Ve D|TLTF" wX)efLmyhY public class SiteFileFetch extends Thread { $/[Gys3" 3`&VRF8 V<i<0E SiteInfoBean siteInfoBean = null; //文件信息Bean *MYt:ms long[] nStartPos; //开始位置 (|g").L long[] nEndPos; //结束位置 ;23=p=/h FileSplitterFetch[] fileSplitterFetch; //子线程对象 *|];f#^9 long nFileLength; //文件长度 \|eJJC boolean bFirst = true; //是否第一次取文件 r7Nu>[r5 boolean bStop = false; //停止标志 j6tP)f^tD File tmpFile; //文件下载的临时信息 m\6SG' X DataOutputStream output; //输出到文件的输出流 =$b-xsmeG
09 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) H\)gE> public SiteFileFetch(SiteInfoBean bean) throws IOException _kn]#^ucCe { +P[88! siteInfoBean = bean; u?q&K|
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Zk]k1]u*5 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 3TU'*w
& if(tmpFile.exists ()) 7o;x (9 { >"cr-LB bFirst = false; s.^c..e75C read_nPos(); *nYB o\@g } K4j@j}zK9I else +jq
2pFQ { gI)w^7Gi nStartPos = new long[bean.getNSplitter()]; !Z
U_,[ nEndPos = new long[bean.getNSplitter()]; 5U0ytDZ2/( } M0O>Ljo4RN B;eW/#` T@(6hEmP, J#6LSD@(O } RI(=HzB _/|8%]) g9DG=\*A public void run() /GsSrP_?] { .r ~'(g{qt //获得文件长度 oz%h)#; //分割文件 OYBotk]{1 //实例FileSplitterFetch dav vI$TA //启动FileSplitterFetch线程 'To<T //等待子线程返回 65lOX$*{- try{ BiA>QQ if(bFirst) m+Y@UgB { =fo4x|{O nFileLength = getFileSize(); v-ThdE$G# if(nFileLength == -1) ?Rlgv5P! { %h0D)6j
System.err.println("File Length is not known!"); >/b^fAG } ?^U c= else if(nFileLength == -2) GUKDhg,W { KZECo1 System.err.println("File is not access!"); YjFWC!Qj$ } 6%>/og\% else iNt 4> { FnY$)o; for(int i=0;i<nStartPos.length;i++) ]+AAT=B<! { .
/Y&\< nStartPos = (long)(i*(nFileLength/nStartPos.length)); o5>/}wIf } Pfm*<,'x"[ for(int i=0;i<nEndPos.length-1;i++) r9?o$=T { +hpSxdAz4 nEndPos = nStartPos[i+1]; @Eo4U]- } {h,_"g\V nEndPos[nEndPos.length-1] = nFileLength; oK)[p!D?0{ } @2u#93Y } D{>\-]\ N50fL E$w#+.QP //启动子线程 z=B<
`}@3 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 3i6h"Wu`n for(int i=0;i<nStartPos.length;i++) \OP9_J(* { _y>}#6B fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 'v\j.j/i siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), W;.{]x.0 nStartPos,nEndPos,i); #L\o;p( Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); +miR3~w. fileSplitterFetch.start(); ANotUty;y } u-kZW1wrQ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~*,Wj?~+7 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); <E SvvTf // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", U3/8A:$y nEndPos = " + nFileLength); 0F1u W>D1 // fileSplitterFetch[nPos.length-1].start(); # J]~ ;t|,nz4kJ %w$mSG //等待子线程结束 ?;_H{/)m //int count = 0; E.9^&E}PG //是否结束while循环 cg{Gc]'1# boolean breakWhile = false; @/LiR>, I
:@|^PYw [NL -! while(!bStop) $5x]%1R { g#}tm< write_nPos(); 9Yn)t#G'`F Utility.sleep(500); y=#j`MH{> breakWhile = true; o ~;M" @*SA$9/l 2Q}7fht for(int i=0;i<nStartPos.length;i++) z#RuwB+ { T!(sZf if(!fileSplitterFetch.bDownOver) '=p? { BR3wX4i\ breakWhile = false; ?]5Ix1 break; (V!0'9c } PGkCOmq } C;ptir1G; if(breakWhile) S_$nCyaH2 break; <W2ZoqaV D&-vq,c :kt/$S^- //count++; F*,5\s< //if(count>4)
jC4O` // siteStop(); xvB8YW" } lA]N04 d qEZ!2R^`G ]q&tQJ/Fa System.err.println("文件下载结束!"); Bh,Q8%\6 } 8RU.}PD catch(Exception e){e.printStackTrace ();} M|H2kvl } AX K95eS 3
1k "O``7HA} //获得文件长度 %0zS public long getFileSize() F)7j@h^ { dWUUxKC int nFileLength = -1; %jTw try{ vzG ABP URL url = new URL(siteInfoBean.getSSiteURL()); .lr5!Stb HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); mqw 84u httpConnection.setRequestProperty("User-Agent","NetFox"); fdLBhe#9M GL`tOD:P" %4/xH9 int responseCode=httpConnection.getResponseCode(); 7 OWsHlU if(responseCode>=400) MnS+ nH!d { kIX)oD}c processErrorCode(responseCode); dXK-&Po' return -2; //-2 represent access is error &oEyixe } {mf.!Xev %/!+(7
D G A EZY String sHeader; ^vM_kArA `O
n(v g>T for(int i=1;;i++) H?{MRe { sG1BNb_ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 6n,xH!7 //Utility.log(in.readLine()); .
pP7"E4] sHeader=httpConnection.getHeaderFieldKey(i); d"GDZ[6 if(sHeader!=null) #Cx%OIi[f { }*Zo6{B- if(sHeader.equals("Content-Length")) #R<G,"N5 { 2vvh|?M nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); x`L+7,&n break; KSsWjF}d } s~Gw } #g{Mne else
p[ Hr39o break; /=/
HB } %"+4
D,'l } }AJ L,Q7q catch(IOException e){e.printStackTrace ();} L#!$hq9{_ catch(Exception e){e.printStackTrace ();} Gk 6fO ib; yu_ BV1u,<T" Utility.log(nFileLength); j.B>v\b_3 ;j!UY.i *v&*% B return nFileLength; C=yD3mVz } P9s_2KOF 8$m1eQ`{ T5q-"W6\ //保存下载信息(文件指针位置) ` yYvYc private void write_nPos() C]Q>*=r { ZMJ3NN]F try{ 1OP"5f output = new DataOutputStream(new FileOutputStream(tmpFile)); cd+^=esSO output.writeInt(nStartPos.length); U3+A MVnB for(int i=0;i<nStartPos.length;i++) m/{Y]D{2 { &rP~`4Mkp // output.writeLong(nPos); gwJ}]Tf output.writeLong(fileSplitterFetch.nStartPos); #@E(<Pu4` output.writeLong(fileSplitterFetch.nEndPos); zWtj|%ts } =1IEpxh% output.close(); vbedk+dd?A } kU1 %f
o catch(IOException e){e.printStackTrace ();} F^]aC98]1 catch(Exception e){e.printStackTrace ();} ?Nu#]u- } yi|:}K$ s.KOBNCFa 0R*}QXph //读取保存的下载信息(文件指针位置) NN11}E6 private void read_nPos() GZS{&w! { RyE_|]I62u try{ ,8~dz DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Zikm?(J int nCount = input.readInt(); ]| z")gOE nStartPos = new long[nCount]; 61kO1,Uz* nEndPos = new long[nCount]; y}Cj#I+a for(int i=0;i<nStartPos.length;i++) 0f{IE@-b { C[g&F0 6 nStartPos = input.readLong(); soDfi-2o3 nEndPos = input.readLong(); Yx!n*+ :J } s<,"Hsh^CR input.close(); <ip)r; } %uW< catch(IOException e){e.printStackTrace ();}
ZRO.bMgZF catch(Exception e){e.printStackTrace ();} v|>BDN@,6 } }FZp840 g&P9UW>qS -: C[P private void processErrorCode(int nErrorCode) [RW,{A { F=VoFmF@ System.err.println("Error Code : " + nErrorCode); a0 qj[+ } /CbkqNV r&=r/k2 WFXx70n //停止文件下载 Xz"
JY public void siteStop() 9'l.TcVm`, { kr6:{\DU:B bStop = true; |NXFla for(int i=0;i<nStartPos.length;i++) ypxC1E fileSplitterFetch.splitterStop(); S;BP`g<l= IG>>j} ^T=5zqRD } bnIf}ut-G } ,znL,%s //负责部分文件的抓取 gl Li **FileSplitterFetch.java >
d^r">!, */ } cRi
A package NetFox; u"eZa!# $*g{[&L|6 ^g\h]RD} import java.io.*; -)<JBs> import java.net.*; WGluZhRuT3 N:5b1TdI, WI%zr2T public class FileSplitterFetch extends Thread { eUYG96Jw 4U:DJ_GN WtMcI>4w String sURL; //File URL cS+?s=d long nStartPos; //File Snippet Start Position v#w4{.8) long nEndPos; //File Snippet End Position PVS\, int nThreadID; //Thread's ID g\E ._ab< boolean bDownOver = false; //Downing is over v!iWzN boolean bStop = false; //Stop identical ^j1Gmv) FileAccessI fileAccessI = null; //File Access interface )_WH#-}
sY&rbJ(P *pmoLiuB> public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 9.^-us1 { U. NeK{ this.sURL = sURL; MI?]8+l this.nStartPos = nStart; qEPf-O:lm this.nEndPos = nEnd; A5`#Ot*3 nThreadID = id; l[:^TfB fileAccessI = new FileAccessI(sName,nStartPos);//定位 jD$;q7fB } |P^ikx6f5 zaQ$ Ht 3~#Z E;># public void run() 6="M0% { 5B_-nYJDt while(nStartPos < nEndPos && !bStop) -(`K7T>D. { :+kg4v&r 6f<*1YR
F AN50P!FZW try{ \nn56o@eN URL url = new URL(sURL); iLc)"L-i HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); YN$ndqOP httpConnection.setRequestProperty("User-Agent","NetFox"); Ov F8&*A String sProperty = "bytes="+nStartPos+"-"; 8uD8or httpConnection.setRequestProperty("RANGE",sProperty); RRK^~JQI.2 Utility.log(sProperty); Mp}!+K Nu>sp,|A +F#=`+V InputStream input = httpConnection.getInputStream(); )cfp(16 //logResponseHead(httpConnection); |E>v~qD8I e-YGuWGN7 |s)VjS4@ byte[] b = new byte[1024]; R;5QD` int nRead; wR`w@5,d while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ZP]2/;h { 77Q4gw~2U nStartPos += fileAccessI.write(b,0,nRead); .N'%hh //if(nThreadID == 1) 5M/%%Ox // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); gwZ+GA } ~GsH8yA_P ZdJVs/33Vn yHV^a0e7EH Utility.log("Thread " + nThreadID + " is over!"); E`
:ZH bDownOver = true; !8H!Fj`|j //nPos = fileAccessI.write (b,0,nRead); !xJLeQFJI] }
!;BZ# tF& catch(Exception e){e.printStackTrace ();} w yuJSB } Iqe=#hUFe! } 0jl:Yzo&\ RBMMXJj A,-[/Z K/ //打印回应的头信息 >n@>h$] public void logResponseHead(HttpURLConnection con) 3M`hn4)K { uaZ"x&oZ# for(int i=1;;i++) ru(?a~lF8~ { q329z> String header=con.getHeaderFieldKey(i); js%4;
if(header!=null) }kgjLaQ^N //responseHeaders.put(header,httpConnection.getHeaderField(header)); %BT)oH} Utility.log(header+" : "+con.getHeaderField(header)); QBN=l\m+ else s~IA},F,\ break; K{`2jK# } VdjU2d
} Cz$Hk;3\6 jSOa ?[*@T2Ck public void splitterStop() m,kvEQ3 { |yId6v bStop = true; * 7zN } NUxAv= xl .wt>.mUH XQ+-+CD } @hz0:ezg: _mI:Lr#dT Y`[HjS, /* l72ie **FileAccess.java hCOy\[2$ *//文件访问(定位,写) sbq44L) package NetFox; +lXdRc`6 import java.io.*; qAuUe=w%p O
#p)~V8~ 0N}
wD- public class FileAccessI implements Serializable{ ;{F;e)${M o#KPrW`XJ/ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 >k&lGF<nl RandomAccessFile oSavedFile; eW }jS/g` long nPos; JXI+k.fi ~$TE gw}7%U`T9 public FileAccessI() throws IOException 0
6G[^ { 6{FS/+ this("",0); w$<fSe7 } v=yI#5 QBBJ1U [K|>s(Sf* public FileAccessI(String sName,long nPos) throws IOException Br.$L { (fLbg, oSavedFile = new RandomAccessFile(sName,"rw"); =>9.@`. this.nPos = nPos; <}x|@u oSavedFile.seek(nPos); MIMPJXT#. } )MX1776kU ?-6x]l=] O}\"$n> public synchronized int write(byte[] b,int nStart,int nLen) jW+VUF-t { hnfrnYH int n = -1; QeOt;{_| try{ S92!jp/ oSavedFile.write(b,nStart,nLen); MM58w3Mz n = nLen; #VMBn} } ~]t2?SqNm catch(IOException e) yI)RGOV { (/rIodHJO e.printStackTrace (); 3
v,ae7$U& } F" #3s= ju2X* m} FCe return n; O.40^u~ } IB]VPj5 +Muia5G BOl$UJ|K } b3HTCO-,fC J|64b _tauhwu /* @0@'6J04 **SiteInfoBean.java "=5vgg3 */ <xh'@592 package NetFox; =ym~=
S .qU%SmQ^ vEee/+1? public class SiteInfoBean { A"T. nqB^y #}]il0d 3E2.v5* private String sSiteURL; //Site's URL fB ,!|u private String sFilePath; //Saved File's Path Tk@g9\6O9 private String sFileName; //Saved File's Name {CyPcD'$s private int nSplitter; //Count of Splited Downloading File sCf(h kpMM%"=V 2W-NCE%K)T public SiteInfoBean() A,CPR0g% {//nSplitter的缺省值为5
0{Ll4 //default value of nSplitter is 5 pUEok + this("","","",5); W&re;?Z{ke } Q8/0Cb/ D@vvy6>~s ';L^mxh public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) O=?X%m # { y.]]V"'2 sSiteURL= sURL; ((IBaEq sFilePath = sPath; 2n+XML sFileName = sName; (/P&;?j this.nSplitter = nSpiltter; ke6cZV5w hy`)]>9z~ (9q {J(44 } N %/DN V$F.`O!hfi *gpD4c7A\ public String getSSiteURL() ,ce^"yG {
q>oH(A return sSiteURL; />I8nS}T } 0*M}QXt Y,Zv0-" :H8L (BsI public void setSSiteURL(String value) g[+Q~/yq { o 0
#]EMr sSiteURL = value; U$JIF/MO_ } WsDe0F >\x
39B G(3la3\( public String getSFilePath() E&tmWOMj> { DWxh{h"> return sFilePath; }
K-[/; } pPoC61F [k{iN1n
Q>c6ouuJ public void setSFilePath(String value) T[=cKYp8\ { 7?WBzo!!L sFilePath = value; w=>mG- } +rO<'H:umJ 4'[ V'c\ H 1X]tw. public String getSFileName() 54DR .>O { X',0MBQ0 return sFileName; q _|5,_a } ?v~3zHK 0!\q 7Cp_41._ public void setSFileName(String value) FAl 6 { u9~J1s<e sFileName = value; ;<R_j%* } ~"0X,APR5 _%%"Y} (>`SS#(T! public int getNSplitter() Ui;s.f { 5&Kn # return nSplitter; ho$%7mc } GQBN-Qv F@K;A%us) ;@s~t:u public void setNSplitter(int nCount) fR;_6?p*B { ov>L- nSplitter = nCount; BtApl)q# } eE_XwLE } 7f,WzvV
C2i..iD Hxi=\2- /* ,w>?N\w!} **Utility.java Dx)XC?'xO */ *lF%8k"Al package NetFox; U {!{5l: xmx;tq g$LwXfg public class Utility { fG5} '8 ID+k`nP hkI);M+@6 public Utility() 0 d]G { Khd ,|pM i_ T dI (.+n1)L? } l);8y5 N)Kr4GC //线程睡眠 ~ riw7" public static void sleep(int nSecond) R?SHXJ%' { rcT<OiYuig try{ 1R9/AP Thread.sleep(nSecond); !S{<Xc'wv } EBLoRW=8ld catch(Exception e) z59J=?| { _S1uJ~j;E e.printStackTrace (); FR"^?z?}p } j-|0&X1C } Or>[_3 <2d@\"AoHE //日志 1X.1t^HH: public static void log(String sMsg) S}O\<6& { tn1aH
+
System.err.println(sMsg); $g;xw?~# } yG4MqR)J Z.JTq~`I [L^#<@S public static void log(int sMsg) s&</zU' { UkV] F] System.err.println(sMsg); k3XtKPO } ;Vt
u8f } (J*0/7
eX &pz8vWCk ~]W8NaQB( /* p6)UR~9Rs **TestMethod.java iN*@f8gf */ %-CC_R|0$ package NetFox; V
"" lR!$+atW =
xk@ Q7$ public class TestMethod { y"ck;OQD LAeX e!y u'p J9>sC public TestMethod() r
N7"%dx { ///xx/weblogic60b2_win.exe 6wgOmyJx try{ !Ao?bs' SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 2Mda'T8 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 9iE66N>z SiteFileFetch fileFetch = new SiteFileFetch(bean); ]'q<wPi fileFetch.start(); t/g}cR^Q } e)kf;Hkf catch(Exception e){e.printStackTrace ();} n6f|,D!? 9':$!Eoq T_WQzEL^ } e
j9G[ <4g^c& 4SYN$?.Mp public static void main(String[] args) %`'VXR?`h= { W#!\.m`5 new TestMethod(); ?x@khzk } XvdhPOMy } +,lD_{}_ 点击下载更多相关资料
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