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/* I#OZ:g^ **SiteFileFetch.java #N][-i */ WOO3z5 La package NetFox; L(3&,!@ import java.io.*; "]eB2k_> import java.net.*; kXL0 U6-47m0% Mi.#x_ public class SiteFileFetch extends Thread { ;`
L%^WZ;- k+"]; ep8UWxB5 SiteInfoBean siteInfoBean = null; //文件信息Bean |sGJum&= long[] nStartPos; //开始位置 ,a>Dv@$Y long[] nEndPos; //结束位置 pLu5x< FileSplitterFetch[] fileSplitterFetch; //子线程对象 ;pm/nu long nFileLength; //文件长度 ;MQl.?vj boolean bFirst = true; //是否第一次取文件 N:B<5l ' boolean bStop = false; //停止标志 t^&hG7L_m, File tmpFile; //文件下载的临时信息 l;q]z DataOutputStream output; //输出到文件的输出流 ]Gi&:k "M:ui0YP //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) \`y:#N<c public SiteFileFetch(SiteInfoBean bean) throws IOException N8nt2r<h { UlWmf{1%]? siteInfoBean = bean; >,,`7%Rv //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Ar)EbGId tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); |Ua);B ~F if(tmpFile.exists ()) _)j\
b { ?GX@&_ bFirst = false; :i{M1z I read_nPos(); |OLXb+7X } r`-8+"P else T'6`A<`3 { }k.yLcXM nStartPos = new long[bean.getNSplitter()]; 6"_pCkn;c< nEndPos = new long[bean.getNSplitter()]; 1L`V{\_0s }
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I%8@ : GJWGT`" public void run() 0=&S?J#! { H`M|B<. //获得文件长度 bGwOhd<. //分割文件 BvvjaC //实例FileSplitterFetch {_!,T%>+1 //启动FileSplitterFetch线程 p"P+8"` //等待子线程返回 ^U?Ac= try{ UIU Pi
gd if(bFirst) m=n79]b:N { ;%0kzIvP nFileLength = getFileSize(); bj`GGxzOb if(nFileLength == -1) KC"S06 { B.=n U System.err.println("File Length is not known!"); t<dFH}U`w } XZN@hXc9:v else if(nFileLength == -2) T
9`AL { jW7ffb
`O System.err.println("File is not access!"); ;o'>`=Y } K bQXH!J else xq.kH| bH { aA$\iFYA for(int i=0;i<nStartPos.length;i++) P$z%:Q { ;i.MDW^N nStartPos = (long)(i*(nFileLength/nStartPos.length)); tQG'f*4 } PCwc= for(int i=0;i<nEndPos.length-1;i++) N( 7(~D=)B { 5$!idfDr|m nEndPos = nStartPos[i+1]; +UWv }| } ?#a&eW nEndPos[nEndPos.length-1] = nFileLength; Jqzw94 } 2ih}?%H8 } Syseiw _8 r'R q{V e%8$" //启动子线程 /t`|3Mw fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ..Dm@m} for(int i=0;i<nStartPos.length;i++) /&\V6=jA1 { Pm#/j; fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), )a0l:jEOc siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ;HAvor=? nStartPos,nEndPos,i); Q\zaa9P Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %7-(c
fileSplitterFetch.start(); ;ZuHv {= } xtCMK1#
x // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), J;<dO7 j5 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); fn/?I\ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ,){#J"W nEndPos = " + nFileLength); X*MK(aV3 // fileSplitterFetch[nPos.length-1].start(); Z^Um\f Z79 6;qk rRe^7xGe7 //等待子线程结束 s[a\m, //int count = 0; G0m$bi=z //是否结束while循环 4S*ifl boolean breakWhile = false; v6DjNyg<x >l8?B L qi/k`T while(!bStop) 74N_> 1!j { S@!_{da write_nPos(); q{G8Po$z' Utility.sleep(500); }fk3a9j9u breakWhile = true; gFuK/]gzI QxPPgn7' VOC$Kqg; for(int i=0;i<nStartPos.length;i++) @C^x&Sjm { SVZ@'X\[M if(!fileSplitterFetch.bDownOver) F#yn'j8 { Pc&dU1 breakWhile = false; X]9<1[f break; lH?jqp } q {}5wM } 3]'ab-,Vp if(breakWhile) 2.</n}g break; zOA~<fhT J~J+CGT~2 P<Z` 8a[ //count++; &ZMQ]'& //if(count>4) |wJdp,q R // siteStop(); i`f!) 1 } G6{'|CV } D!tB wO.d;SK System.err.println("文件下载结束!"); 7bbFUUUG" } HCrQ+r{g catch(Exception e){e.printStackTrace ();} LUxDP#~7 } CAvi P61T Rs{8vV LEjq<t1& //获得文件长度 uWClT): public long getFileSize() JFc,f { &/Gn!J;1 int nFileLength = -1; F (kq try{ F{QOu0$cA4 URL url = new URL(siteInfoBean.getSSiteURL()); "0nsY E HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); AH/^v;- httpConnection.setRequestProperty("User-Agent","NetFox"); [?:MIl#! !_3b#Caf Z'9 | int responseCode=httpConnection.getResponseCode(); u4T$ if(responseCode>=400) q9_AL8_ { C7R3W, processErrorCode(responseCode); I6;6x return -2; //-2 represent access is error yKrbGK*=_ } BI%~0Gj8 -1B. A QjXJo$I6 String sHeader; *k#"@ f*"T]AX0 M `q|GY
for(int i=1;;i++) XM+.Hel { i"n_oO //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 0+1!-Wo //Utility.log(in.readLine()); Xu~N97\G sHeader=httpConnection.getHeaderFieldKey(i); L ?;UcCB if(sHeader!=null) Kyk{:UnI { G"m0[|XH if(sHeader.equals("Content-Length")) oB!Y)f6H1 { UkD\ma nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); [O ^/"Qk break; T=~d.&J } /N%i6t<xU } li?@BHEf else +\%]<YO break;
ox<&T| } 2G-"HOG } /kyO,g$9 catch(IOException e){e.printStackTrace ();} H;_Ce'oU( catch(Exception e){e.printStackTrace ();} 6W1+@
q aY,Bt qHgtd+
I Utility.log(nFileLength); 4qE4 i:b <)LR gfN=0Xj4 return nFileLength; V.$tq } urkuG4cY )lt1I\n*k f{L;, //保存下载信息(文件指针位置) 2`;XcY4A private void write_nPos() 1}c/l<d { *2~WP'~PQd try{ mE{QT ZS output = new DataOutputStream(new FileOutputStream(tmpFile)); H[s+.&^ output.writeInt(nStartPos.length); T?[;ej: for(int i=0;i<nStartPos.length;i++) vOCaru?~h { mX.mX70|J // output.writeLong(nPos); Bca$%3M output.writeLong(fileSplitterFetch.nStartPos); @}Ry7H0O output.writeLong(fileSplitterFetch.nEndPos); |6?s?tC"u } xc@$z*w output.close(); d>I)_05t } NTZ3Np` catch(IOException e){e.printStackTrace ();} kq(><T catch(Exception e){e.printStackTrace ();} F~E)w5?\O } <G<5)$
S E <j=5|0t 6J JA"] ` //读取保存的下载信息(文件指针位置) :ln|n6X private void read_nPos()
Z R=[@Oi { 2uT6M%OC try{ UE5,Ml~X DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ;xw9#.d#D int nCount = input.readInt(); _~CJitR3 nStartPos = new long[nCount]; z8S]FpM6 nEndPos = new long[nCount]; Z/: yYSq for(int i=0;i<nStartPos.length;i++) E Lq1 { ;c]O *\/ nStartPos = input.readLong(); 6W3oIt nEndPos = input.readLong(); ]Oo!>iTQi } :epB:r input.close(); p`7d9MV^ } ]<YS7.pT catch(IOException e){e.printStackTrace ();} q Sv!5&u catch(Exception e){e.printStackTrace ();} r9bAbE
bI } C_ d|2C6 aw lq/ 52#
*{q} private void processErrorCode(int nErrorCode) ND?"1/s { E]&N'+T
System.err.println("Error Code : " + nErrorCode); %nq<nfDT } 2P'Vp7f6 Y :+QNN< .j,xh )v" //停止文件下载 s/J7z$NEU public void siteStop() $1d{R;b[ { tAep_GR bStop = true; T>1#SWQ/9 for(int i=0;i<nStartPos.length;i++) @V^.eVM\R fileSplitterFetch.splitterStop(); 3j$,L( hmLI9TUe6 Kc^ctAk7; } P%yL{ } Jn|<G //负责部分文件的抓取 ^9hc`.5N&? **FileSplitterFetch.java -*w2<DCn */ q3/4l%"X package NetFox; yr>J^Et%_ n2AoEbd ./7-[d import java.io.*; x~Z7p)D_< import java.net.*; HES$. a B/lIn'= xA:;wV public class FileSplitterFetch extends Thread { |p+FIr+ qR2cRepV (dNF)(wn String sURL; //File URL 1z2v[S&pk long nStartPos; //File Snippet Start Position IN1n^f$: long nEndPos; //File Snippet End Position #2Q%sE? int nThreadID; //Thread's ID rs>,p) boolean bDownOver = false; //Downing is over g]44|9x(W boolean bStop = false; //Stop identical !U(S?:hvW FileAccessI fileAccessI = null; //File Access interface h V`?,
~K hF^JSCDz l >zJk G9a public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ;XZN0A2 { B$JPE7h@[P this.sURL = sURL; 9dszn^]T this.nStartPos = nStart; mqJD+ K this.nEndPos = nEnd; `'r]Oe nThreadID = id; JF}i=} fileAccessI = new FileAccessI(sName,nStartPos);//定位 ?Y\WSI?i } g9g ]X J'=s25OWU c; .y public void run() ]moBVRd { p\'X%R while(nStartPos < nEndPos && !bStop) d@JavcR { gV ':Xe zN+jn t,XbF try{ $`0^E#Nl URL url = new URL(sURL); FChW`b&S HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); xk8NX-: httpConnection.setRequestProperty("User-Agent","NetFox"); G;t<dJ8 String sProperty = "bytes="+nStartPos+"-"; ]+qd|}^ httpConnection.setRequestProperty("RANGE",sProperty); g_tEUaiK Utility.log(sProperty); p'@z}T?F :nnch?J_ (1er?4 InputStream input = httpConnection.getInputStream(); L=!h`k //logResponseHead(httpConnection); <$uDN].T4 si]MQ\i+ v/]xdP^Z byte[] b = new byte[1024]; Y@ ;/Sf$Q int nRead; qB$QC while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) |4aU&OX { 5f@&XwD9 nStartPos += fileAccessI.write(b,0,nRead); 9
s2z=^ //if(nThreadID == 1) FRPdfo37 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6,~
% } id`9,IJx 5 8U[IGs( PDgZb Utility.log("Thread " + nThreadID + " is over!"); O6-';H:I]L bDownOver = true; 9ucoQ@ //nPos = fileAccessI.write (b,0,nRead); $V<fJpA } $'*{&/@ catch(Exception e){e.printStackTrace ();} _Eq,udCso } 5|bfrc } ~U8#yo 9K&YHg:1 \Z~@/OVc //打印回应的头信息 tg/!=g public void logResponseHead(HttpURLConnection con) Uul5h8F { Ix=(f0| for(int i=1;;i++) !]7L9TGn { 3dtL[aVwY String header=con.getHeaderFieldKey(i); @WKJ7pt`'N if(header!=null) !,7)ZW?*8 //responseHeaders.put(header,httpConnection.getHeaderField(header)); r:U<cLT[9 Utility.log(header+" : "+con.getHeaderField(header)); h;cw=G else KUq(&H7 break; ^\VVx:] } ]nxSVKE4p } '2<N_)43$ }b<w \9AF -"Nvu public void splitterStop() X1u\si%.4S { &,/-<y-S bStop = true; 1F2(MKOo! } j{ri]?p RSjcOQ8&.w v]q"{c/ } O6q5qA VF<VyWFC0` Qq.Ja%Zq /* \)g} **FileAccess.java iNL>TVUM *//文件访问(定位,写)
? EhIK package NetFox; ="g9> import java.io.*; KC<K*UHPAH >dDcm P!&yYR\ public class FileAccessI implements Serializable{ ,;h}<("q X4bZ4U* //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ?*QL;[n1 RandomAccessFile oSavedFile; b^P\Kky long nPos;
|gGD3H Q'^$;X~-< ~!Rf5QA85 public FileAccessI() throws IOException b|.<rV'BTt { B-$ps=G+z this("",0); }qhND-9#@ } OR10IS "@xL9[d *>lXCx public FileAccessI(String sName,long nPos) throws IOException W=K+kB { sg<c1 oSavedFile = new RandomAccessFile(sName,"rw"); a7z%)i;Z this.nPos = nPos; Nqj5, 9*c oSavedFile.seek(nPos); w(odgD } z Hl+P*) mP
+H
C)2 %LnG^L public synchronized int write(byte[] b,int nStart,int nLen) kxY9[#:<fB { ( d8rfet int n = -1; `P*PCiZos try{ NQd0$q oSavedFile.write(b,nStart,nLen); \Dx)P[Ur n = nLen; v@:m8Y(t } 5lE9UoG[Q catch(IOException e) @`SlOKz!= { 5%fR9?) e.printStackTrace (); "(;t`,F } ;Z&w"oSJ j|r$!gV '81WogH: return n; _E^ !,Wz } *Y ?&N2@c ,Mn?h\ 2cv=7!K4Uv } 1(a+| O]9PYv=^ %/K;!'7 /* Mbxrj~ue **SiteInfoBean.java }pT>dbZ */ @.v{hkM` package NetFox; ].N%A07 [ldx_+xa:E Ehtb`Ms public class SiteInfoBean { |OBZSk1jp <d3a "A}2iI private String sSiteURL; //Site's URL pxQh;w private String sFilePath; //Saved File's Path 0(|36;x private String sFileName; //Saved File's Name )KN]"<jB
private int nSplitter; //Count of Splited Downloading File h]^=
y.Q =#?=Lh E@)9'?q public SiteInfoBean() ]7%+SH,RdD {//nSplitter的缺省值为5 -lI6!a^ //default value of nSplitter is 5 $w! v this("","","",5); YM +4:P2 } %uy?@ e fSm|anuKZe X0]5I0YP public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) v,)vW5jGI { SMHQh.O?5 sSiteURL= sURL; {mB &xz:b sFilePath = sPath; ;#dzw!+Y sFileName = sName; (=QiXX1r this.nSplitter = nSpiltter; G-RE t",b.vki\z {pk&dB _Bu } 22v=
A6 = HVM(LHm=: NYF
7Ep; _ public String getSSiteURL() 4]ETF+ { q<Wz9lDMNR return sSiteURL; [gE2;J0* } d>`s+B9K0 Jgzg[6
<Lfo5:. public void setSSiteURL(String value) qfB!)Y { Vg1MA sSiteURL = value; d)v'K5 } :.F;LF& XbW 1`PH -F';1D!l% public String getSFilePath() bBXUD;$ { 2@$`xPg
return sFilePath; r[kmgPld } 3rVWehCv kntn9G uBxs`'C public void setSFilePath(String value) P&9&/0r=_ { k(3FT%p sFilePath = value; sKGR28e } \t' ]Lf bc*CP0t| #TG.weTC public String getSFileName() FK`M+ j { l=ZX9<3 return sFileName; JReJlDu } } !RBH(m% 8H2A<&3i a3E.rr;b public void setSFileName(String value) MDOP2y`2i { +>o}
R?xj sFileName = value; J I[9c,N } sGFC?1r?\ OA8iTn aX(Y
`g)| public int getNSplitter() OW1\@CC-69 { Om C
F8:\/ return nSplitter; \kVi&X=q: } R\n*O@E
v3 >R2o7~ gjex; h public void setNSplitter(int nCount) 1A;f[Rze { @N+6qO} nSplitter = nCount; XiN@$ } _6{XqvWqb } {x/)S*:Z =9cN{&qf Ox}a\B8 /* J={IGA **Utility.java l*>,:y */ SOo}}a0 package NetFox; YV/JZc f RI-)Qx&!f ?UV!^w@L:0 public class Utility { g)Dg=3+> Sv|jR r' '7/c7m/$X< public Utility() x"n)y1y { &{H LYxh <&p0:S7 _q 1E4z } "o>gX'm* 56^#x //线程睡眠 !Di*y$`}b public static void sleep(int nSecond) s!F`
0=J^ { 2]f?c%)I try{ EiWsVic[ Thread.sleep(nSecond); .]H1uoci| } 2vx1M6a)L catch(Exception e) ! )PV-[2 { AWn$od`#s
e.printStackTrace (); 4]%v%64U } },(Ln%M } ~xV|<; Ym/y2B( //日志 0X[uXf public static void log(String sMsg) s2Hx?~ { Z^SF $+UN System.err.println(sMsg); !_#2$J*s^D }
/DN!" 2C_/T8 *Z
C$DW!- public static void log(int sMsg) Hlye:.$ { KJ;NcUq System.err.println(sMsg); !Au 9C
} \rY<DxtOq } K"U[OZC` @Zov&01 -iJ @K /* ,CA3Q.y>| **TestMethod.java ]\Q9j7}37+ */ %+e%
RZ3 package NetFox; Or*e$uMIY .cA'6J"Bm\ 52>,JHq public class TestMethod { K~ShV {m2lVzK mDJN)CX public TestMethod() Xj(" { ///xx/weblogic60b2_win.exe JVk"M=c try{ -cW'g SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); dpWBY3(7a //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); + U]; SiteFileFetch fileFetch = new SiteFileFetch(bean); {Wp5Ane fileFetch.start(); $MB/j6#j } /agX! E4s catch(Exception e){e.printStackTrace ();} l!^+Xeg~ s`Z'5J;S v<c@bDZ> } d0MF\yxh kz+OUA@~ ;&v~tD7 public static void main(String[] args) ri?>@i-9= { uy^vQ/ new TestMethod(); "o.g}Pv } p{BBqKv } FqT2+VO~ 点击下载更多相关资料
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