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/* I2kqA5>)j **SiteFileFetch.java q"ba~@<BEl */ =2uE\6Fl, package NetFox; #Z<pks2
y import java.io.*; ~r;da 9 import java.net.*; '`?\CXX ~K% ]9
"
]
0ER public class SiteFileFetch extends Thread { )bRe"jxn7 #S2LQ5U v'i"Q SiteInfoBean siteInfoBean = null; //文件信息Bean [M_pf2Y long[] nStartPos; //开始位置 c:I1XC long[] nEndPos; //结束位置 `q* 0^} FileSplitterFetch[] fileSplitterFetch; //子线程对象 hPr*<2mp long nFileLength; //文件长度 zrk/}b0j boolean bFirst = true; //是否第一次取文件 5EDHJU> boolean bStop = false; //停止标志 pcXY6[#N File tmpFile; //文件下载的临时信息 XSt5s06TM DataOutputStream output; //输出到文件的输出流 58zs%+F xn)FE4 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) uA=6 HpDB public SiteFileFetch(SiteInfoBean bean) throws IOException ;5^grr@,4 { F48:mfj1r siteInfoBean = bean; MK9?81xd //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 4 q}1 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); NHA
2 i if(tmpFile.exists ()) 'D%No!+Py { UT[nzbG bFirst = false; Y M{Q)115 read_nPos(); g!~&PT)* } K+2bNKZ0 else d='z^vHK { .vNfbYH( nStartPos = new long[bean.getNSplitter()]; BL0WI9 nEndPos = new long[bean.getNSplitter()]; G&:[G>iSm^ } zr@Bf!VG: 'KpCPOhfR hRb
k-b ^|xj. } P]!$MOt ]Vhhx`0 Na: M1Uhb public void run() 6nt$o)[ { /b6Y~YbgU //获得文件长度 eHK}U+"\ //分割文件 ^!k^=ST1J //实例FileSplitterFetch -aG( Yx //启动FileSplitterFetch线程 toPA@V //等待子线程返回 nQK@Uy5Yr try{ &=fBqod if(bFirst) s=#IoNh { 7c!oFwM nFileLength = getFileSize(); z/ T| if(nFileLength == -1) S1uW`zQ!+_ { ]n?a h System.err.println("File Length is not known!"); i_g="^ } ;Fcdjy else if(nFileLength == -2) 7}Z.g9< { %8`zaa System.err.println("File is not access!"); WzgzI/ } oV?tp4& else ({D.oS { %r6LU<;1@ for(int i=0;i<nStartPos.length;i++) 9UOx~Ty { I5'^tBf[{ nStartPos = (long)(i*(nFileLength/nStartPos.length)); V'c9DoSRI\ } qA9*t for(int i=0;i<nEndPos.length-1;i++) GW'=/
z7 { FU!U{qDI nEndPos = nStartPos[i+1]; NF0IF#;a } RUf,)]Vvk nEndPos[nEndPos.length-1] = nFileLength; g-mK(kY4p } y[qW> } 2t1 WbP1 =N<Hc:<t4 vb: '%^v //启动子线程 ;5my(J*b fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; [rTV)JsTb for(int i=0;i<nStartPos.length;i++) \yb^%$hZ0
{ }n=Tw92g fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), )_+" siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), *bn9j>|iv nStartPos,nEndPos,i); PNT.9 *d Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); @`}'P115@ fileSplitterFetch.start(); {eIE| } N<Bi.\XC // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 1|/2%IDUI siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); WSDNTfpI // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", )%X\5]w` nEndPos = " + nFileLength); ;}f%b E // fileSplitterFetch[nPos.length-1].start(); Ze WHSU
p: sn>Y Yc:b:\0}F6 //等待子线程结束 A40 -])'! //int count = 0; rC_K
L //是否结束while循环 RfN5X}&A boolean breakWhile = false; XIBw&mWf v8*ZwF A6iyJFmD while(!bStop) g?j"d{.9t { <py~(q write_nPos(); q>Px Utility.sleep(500); 4
CX*,7LZ breakWhile = true; lBQ|= \`>Y Syp|s3u; for(int i=0;i<nStartPos.length;i++) 2"<}9A<Xs { uO[4 WZ if(!fileSplitterFetch.bDownOver) \vQ_:-A { 7UQD02 breakWhile = false; Crpkq/ M break; L@a-"(TN+ } 7Fy^K;V" } Q7=J[,V: 2 if(breakWhile) 9\Xl3j! break; C
2oll-kN r{%NMj &`>*3m( //count++; KL5rF,DME //if(count>4) uT-WQ/id // siteStop(); lq.0?( } Q&QR{?PMD g LpWfT29V `=-}S+ System.err.println("文件下载结束!"); ;F5B)&/B } cK-!Evv catch(Exception e){e.printStackTrace ();} pY8+;w
EI } W_sDF; JP Ab_aB+g ] (Nik(Oyj" //获得文件长度 >F-J}P public long getFileSize() dk(-yv' { uxh4nyE int nFileLength = -1; ;U7\pc;S try{ '
>\* URL url = new URL(siteInfoBean.getSSiteURL()); [dzb{M6_ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); b7>;UX httpConnection.setRequestProperty("User-Agent","NetFox"); e#zGLxa s?`)[K'- PTePSj1N int responseCode=httpConnection.getResponseCode(); Nc"h8p? if(responseCode>=400) ;<&s_C3 { jG.*tuf processErrorCode(responseCode); 10[~ki-1; return -2; //-2 represent access is error \C<rg| } U-lN_? G3U+BC23E W6_3f-4g String sHeader; <0kRky$ kb%W3c9HO pt0H*quwI for(int i=1;;i++) oOUVU}H { hD$U8~zK //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); r{<u\>6X>P //Utility.log(in.readLine()); a"&Z!A:Z= sHeader=httpConnection.getHeaderFieldKey(i); v5 9> if(sHeader!=null) lO9>?y8.y { '[juPI(! if(sHeader.equals("Content-Length")) uj:w^t ][ { @+{S-iD" nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); A?7%q^;E break; a)TNVm^ } qC6Q5F } aIfog+Lp else @DUdgPA break; #dl8+ } 96PVn } vEgJmHv; catch(IOException e){e.printStackTrace ();} vj_oMmjKw catch(Exception e){e.printStackTrace ();} 8n73MF
.xk<7^ZD /f6]XP\'`+ Utility.log(nFileLength); FVD}9ia |Ji?p>\~ Wh<lmC50( return nFileLength; wG|3
iFK } MkYem6 Xt7'clr S m1bDa\!= //保存下载信息(文件指针位置) DRzpV6s private void write_nPos() DQ9s57VxC! { K9P"ncMt try{ nAX|=qp# output = new DataOutputStream(new FileOutputStream(tmpFile)); M"FAUqz` output.writeInt(nStartPos.length); CVUJ(D&Q for(int i=0;i<nStartPos.length;i++) 5m bs0GL { KW;xlJz(j // output.writeLong(nPos); 2h:f6=)r/u output.writeLong(fileSplitterFetch.nStartPos); OcH- `A output.writeLong(fileSplitterFetch.nEndPos); bFVdv&
} q#778 output.close(); '^J/aV } k}O|4*.BT catch(IOException e){e.printStackTrace ();} wYxizNv, catch(Exception e){e.printStackTrace ();} I^wj7cFo5 } QP;b\11m Mu (Y6 FlgB-qR]<n //读取保存的下载信息(文件指针位置) QbNv+Eu5 private void read_nPos() "TV.$s$. { A,og9<+j- try{ 'wZy: c DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); g:6yvEu$ - int nCount = input.readInt(); A8RT3OiXA nStartPos = new long[nCount]; czb%%:EJs| nEndPos = new long[nCount]; Pz)QOrrG~ for(int i=0;i<nStartPos.length;i++) ."^dJ |fN { m@Nx`aS? nStartPos = input.readLong(); 0!VLPA: nEndPos = input.readLong(); EUn"x'
} %zD-gw> input.close(); Gzfb|9,q } xWwPrd catch(IOException e){e.printStackTrace ();} }ri*e2y) catch(Exception e){e.printStackTrace ();} ]EcZ|c7o9y } nSow$6T_ ~ghz%${` Q)@1:(V/ private void processErrorCode(int nErrorCode) qN0#=X
{ [s34N+vU System.err.println("Error Code : " + nErrorCode); E5t+;vL~ } Y) h%<J ]dK]a:S "[?/I3{E //停止文件下载 0C p} public void siteStop() @r]s9~Lx9 { MELGTP> bStop = true; IX*S:7S[ for(int i=0;i<nStartPos.length;i++) Fp6Y Y
fileSplitterFetch.splitterStop(); PJYA5"}W /T(\}Z G}-.xj] } .fsk DW } eq+o_R}CS //负责部分文件的抓取 F=om^6G%X5 **FileSplitterFetch.java p<zXuocQ */ |Hm'.- package NetFox; Q kZM(pG ]18ygqt `I>K? import java.io.*; :|M/+XPu import java.net.*; xs I/DW DqMK[N,0 P{Z71a5 public class FileSplitterFetch extends Thread { 8$v7|S6 z $048y
X 7M oyt//SE String sURL; //File URL tvOAN|+F long nStartPos; //File Snippet Start Position @."o:K long nEndPos; //File Snippet End Position .lBY"W&{ int nThreadID; //Thread's ID 6}T%m?/ } boolean bDownOver = false; //Downing is over 6XAr8mw9 boolean bStop = false; //Stop identical |{PJT#W% FileAccessI fileAccessI = null; //File Access interface `zp2;]W rH9}nL :2pBv#\"qk public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException p},Fwbl { !ix<|F5 this.sURL = sURL; o w_y this.nStartPos = nStart; S@g/Tn this.nEndPos = nEnd; <gdgcvd nThreadID = id; eM+;x\jo? fileAccessI = new FileAccessI(sName,nStartPos);//定位 >NRz*h # } n6-Ic',; '98h<(@] 7F(F.ut public void run() -?nT mzRc { &fSc{/ while(nStartPos < nEndPos && !bStop) n]DN xC@b { H~|%vjH @7s,|\ -+rF]|Wi try{ 3Y{)(%I URL url = new URL(sURL); b3b~T]] HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); fHd!/%iG httpConnection.setRequestProperty("User-Agent","NetFox"); 8RAeJ~e String sProperty = "bytes="+nStartPos+"-"; 7_40_kwJi httpConnection.setRequestProperty("RANGE",sProperty); [-t> G!) Utility.log(sProperty); bkwa{V [Hj'nA^ 9V;$v InputStream input = httpConnection.getInputStream(); ;:4P'FWm^ //logResponseHead(httpConnection); N
2"3~ # 0R}Sw[M. vA;F]epr! byte[] b = new byte[1024]; 2]} Uov int nRead; akhL\-d)al while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) V`\f+Uu { 9*|3E"Vr nStartPos += fileAccessI.write(b,0,nRead); w2d]96*kQe //if(nThreadID == 1) So=nB} b[? // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `_1(Q9Q } Z|(c(H2
f5aF6FBH VS9]po>= Utility.log("Thread " + nThreadID + " is over!"); '^Utbp2< bDownOver = true; 4`6c28K0? //nPos = fileAccessI.write (b,0,nRead); 3_MS'&M } +lW}ixt catch(Exception e){e.printStackTrace ();} {@V3?pG?p } lU$4NUwM } X&(ERY,h (]Ye[j^"7 Q)Iv_N/ //打印回应的头信息 2]D$|M?$~ public void logResponseHead(HttpURLConnection con) qB F!b0lr { )[^y
t0% for(int i=1;;i++) abo>_"9- { )Ig+uDGk String header=con.getHeaderFieldKey(i); :4ja@~ if(header!=null) {^cF(7p //responseHeaders.put(header,httpConnection.getHeaderField(header)); I
f3{E Utility.log(header+" : "+con.getHeaderField(header)); Or+*q91j else #Pu@Wx break; u
m:0y, } *:\:5*SY } F#1 Kk#t 1l+kO,X] {}_ Nep/; public void splitterStop() 7}ws
|4Y { 3vdu;W=Sz bStop = true; I7dm \|# } +UK%t>E8 ]<kupaRQ RCBf;$O } |rHG%VnBH =.36y9Mfo UzgA26; /* [DZqCo **FileAccess.java 7R9nMGJ@ *//文件访问(定位,写) /l,+oG%\ package NetFox; ietRr!$. import java.io.*; )MWUS;O< ~u /aOd s\'y-UITi1 public class FileAccessI implements Serializable{ e1
x^PT
qH#r- //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 R_1)mPQ^P RandomAccessFile oSavedFile; v7i^O`{eD? long nPos; ~+O `9& 4\LZD{ w9RF2J public FileAccessI() throws IOException TB7>s~)47E { &?.n2+T+
= this("",0); )0#j\B } {=UFk-$= Y5dD|]F| D \N
\BD public FileAccessI(String sName,long nPos) throws IOException Bo`Tl1K# { _u&>&,:q oSavedFile = new RandomAccessFile(sName,"rw"); GX4QaT% this.nPos = nPos; ?y~TC qV oSavedFile.seek(nPos); O:
,$% } 0b/ir 2 LHh5 v"zjG )~ 0}Et l public synchronized int write(byte[] b,int nStart,int nLen) %35L=d[ { I2f?xJ2/Z int n = -1; #6Jc}g<?g try{ 9G0D3F oSavedFile.write(b,nStart,nLen); fUC9-?(K n = nLen; .VT;H1# } 1/B]TT catch(IOException e) wfgqgPo!v { T~BA)![ e.printStackTrace (); 2w+U$6e C } Cye
T]y %2f//SZ: pSHSgd~& return n; ^ eQFg> } $
+;+:K !p9)CjQ " A{# Nwd> } x2co>.i ? B@E!/f ~9\$5n)a /* nVE9^')8V **SiteInfoBean.java &-%>qB|* */ ~ 3^='o package NetFox; 'Gx$Bj 8)N@qUV B
z^|SkEit public class SiteInfoBean { F]UQuOR) QT!
4[,4 J'b<z.OW private String sSiteURL; //Site's URL }pVTTs` private String sFilePath; //Saved File's Path k|xtrW`qo; private String sFileName; //Saved File's Name /kgeV4]zR private int nSplitter; //Count of Splited Downloading File !gF9k8\Yr$ ndink$ %f j+70 public SiteInfoBean() O}Hf62" {//nSplitter的缺省值为5 X&M4MuL //default value of nSplitter is 5 fmfTSN(Q~` this("","","",5); pd3,pQ } sV/l5]b] mMSh2B .f:n\eT): public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) "9IYB)Js { ('O}&F1 sSiteURL= sURL; nOb?-rR sFilePath = sPath; *4S-z&,.c sFileName = sName; D f4+^B,1 this.nSplitter = nSpiltter; hoM|P8
}rh RBwO+J53y FdzNE } W#'c5:m
4 iYJZvN iCj2"T4TN public String getSSiteURL() MP^ d}FL { a,|?5j9,P return sSiteURL; ?m7:if+y } T f4tj!t- POAw M ht =P\E public void setSSiteURL(String value) {D`'0Z1" { ~j>D=! sSiteURL = value; Z(u5$<up } c$:1:B9\ <IJu7t> xYfD()w<I public String getSFilePath() GOT1@.Y { M;w?[yEZ return sFilePath; 4dawg8K`9 } _;1}x%4v OFk8 >"| ?S
Z1`.S public void setSFilePath(String value) ]:(W_qEA { mYxyWB sFilePath = value; m8R9{LC } \Q~8?p+ ^EELaG fu[K". public String getSFileName() &;i
"P { %" D%: return sFileName; 0NDftcB] } m)v''`9LU [AU
II*:} 2P#=a?~[ public void setSFileName(String value) @"-</x3o { d}'U?6ob sFileName = value; 1Xu?(2;NF } );V2?G`/ S! Rc|6y% fq )vK public int getNSplitter() 'e)^m}:?D { NLS"eDm return nSplitter; fKH7xu!V4+ } =m89z}Ot ?BA]7M(,4 $+JS&k/'m public void setNSplitter(int nCount) {n#k,b&9B { kOOGw:/ nSplitter = nCount; Q?b14]6im } N;Dp~(1
J1 } +4;uF]T $YxBE`)d- ?eH&'m}- /* +gd4\ZG **Utility.java Hy.AyU|L */ [^CV>RuO package NetFox; aj8A8ma*} ca i<,3H 32DbNEk public class Utility { -fhN"B) 8Jf.ECQT 1"Z@Q`} public Utility() **9x?s { n0Y+b[+wj pl@O
N"=[ 2M#M"LHo } Q!-
0xlx Jk@]tAwoM //线程睡眠 0a8/B>
public static void sleep(int nSecond) XO#/Fv! { `&\Q +W try{ theZ]5_C Thread.sleep(nSecond); ojYbR<jn9 } Xq'cA9v=$J catch(Exception e) `E+Jnu,jC { QaUm1i# e.printStackTrace (); D\IjyZ-O } SJD@&m%?[ } mc=LP>uoS DPi_O{W> //日志 !.2<| 24 public static void log(String sMsg) ]7-&V-Ct* { Qt_dEl System.err.println(sMsg); l/;X?g5+ } B8E'ddUw "KcA n>@oBG)! public static void log(int sMsg) z/i+EE { 21k5I #U System.err.println(sMsg); ga?*DI8w } d%l{V6 } _|h8q-[3 G\|,5HED &zs'/xv] /* U
qG
.:@T **TestMethod.java {vAE:W.s */ Gt9&)/# package NetFox; IV\J3N^ >S$Z ss;R8:5 public class TestMethod { d,Y_GCZ7|W Y*mbjyt[?X A?Bif; public TestMethod() ECv)v { ///xx/weblogic60b2_win.exe 2]% h$f+ try{ !i=nSqW SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); lu Q~YjH //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Mq';S^ SiteFileFetch fileFetch = new SiteFileFetch(bean); j xYc2 fileFetch.start(); (O0Urm } d)~Fmi; catch(Exception e){e.printStackTrace ();} apE
}fp-5
CI3XzH\IX* } `/Y{ l JN7k 2]{ N},n `Yl. public static void main(String[] args) &89oO@5 { 0uBl>A7qhn new TestMethod(); Tw + } q^6 +!&" } T|tOTk 点击下载更多相关资料
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