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/* 5ro^<P0f** **SiteFileFetch.java SvLI%>B=9 */ Z9,-FO{#3- package NetFox; t2uX+1F import java.io.*; -|YG**i/ import java.net.*; p#go<Y# jgNdcP F9IrbLS9c public class SiteFileFetch extends Thread { QH7"' u6 sxkWg> ia6%>^ SiteInfoBean siteInfoBean = null; //文件信息Bean G<:_O-cPSv long[] nStartPos; //开始位置 ;5Spdi4w long[] nEndPos; //结束位置 wyJ+~ FileSplitterFetch[] fileSplitterFetch; //子线程对象 c&me=WD long nFileLength; //文件长度 v"ZNS boolean bFirst = true; //是否第一次取文件 (dmLEt boolean bStop = false; //停止标志 m[n=t5~ File tmpFile; //文件下载的临时信息 /6",#B}%b DataOutputStream output; //输出到文件的输出流 0P i+ (X q(xr5iuP_ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) !1(*D*31 public SiteFileFetch(SiteInfoBean bean) throws IOException Wg{ 9X#| { m#w1?y)Z@X siteInfoBean = bean; 1seWR" //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); %n?_G| tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); I(m*%> if(tmpFile.exists ()) ~(aMKB { v
*icoj bFirst = false; r)<c
~\0 7 read_nPos(); AwnQ5-IR\ } t^Z-0jH else / vgEDw { wH]5VltUT1 nStartPos = new long[bean.getNSplitter()]; ^Mvgm3hg nEndPos = new long[bean.getNSplitter()]; {0L.,T~g+[ } '_ZiZ4O D*=.;Rq 2 nra@ 0nr 5(4h } ~t+T5`K A4{14Y;? ]?S@g'Jd0Q public void run() _p*a`,tK { xqSoE[<v //获得文件长度 UpTVLx^c //分割文件 ^=Dz)95c //实例FileSplitterFetch +L0Jje>Az //启动FileSplitterFetch线程 WU$l@:Yo //等待子线程返回 mP*Ct6628n try{ 1u8 k} if(bFirst) d H N"pNNs { z!s1$5:" 0 nFileLength = getFileSize(); po9f[/s'+o if(nFileLength == -1) jWL%*dJrN { @ /.w% System.err.println("File Length is not known!"); L}=DC =E } :X*$U
~aQ else if(nFileLength == -2) 9 1.gE*D { FW"n+7T System.err.println("File is not access!"); T{So2@_& } fK|P144 else 4^Ke?;v { 0gRm LX for(int i=0;i<nStartPos.length;i++) 8-B6D~i { ;RK;kdZ nStartPos = (long)(i*(nFileLength/nStartPos.length)); J
?0P{{ } RNo~}# for(int i=0;i<nEndPos.length-1;i++) K+\2cf?bU { XEBeoOX/ nEndPos = nStartPos[i+1]; 6bDizS} } O70#lvsM; nEndPos[nEndPos.length-1] = nFileLength; 8S`
j6 } }U'VVPh_ } mY[*(a RkZyqt
@+ -}1TT@ //启动子线程 z3c7 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 8 =oUE$9 for(int i=0;i<nStartPos.length;i++) 11vAx9 { 1'!D
fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 'gtcy siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 3#?53s nStartPos,nEndPos,i); Tb:6IC7=" Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); G<-<>)zO! fileSplitterFetch.start(); Zi?:< H} } Ft^X[5G4L // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), O\SH;y,N siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); a/</P
|UG // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", F/PH=Dk nEndPos = " + nFileLength); LJ6L#es2 // fileSplitterFetch[nPos.length-1].start(); iR"6VO D*>#]0X Jj/}GVNc7 //等待子线程结束 #KNl<V+c}1 //int count = 0; nYR#Q| //是否结束while循环 Z~w2m6;s boolean breakWhile = false; -'F27]) LzxO=+=9!q DheQcM while(!bStop) &e78xtA{ { 5 B t~tt write_nPos(); W] WH4.y Utility.sleep(500); b0/YX@ breakWhile = true; ;b(ww{& t,n2N13 xs&xcRR" for(int i=0;i<nStartPos.length;i++) (xE |T f { \H9:%Tlp~4 if(!fileSplitterFetch.bDownOver) a`8]TD { artn _ breakWhile = false; F9Af{*Jw?x break; FQ>kTm`d } :+
mULUi } 9Z }<H/q if(breakWhile) QJ(5o7Tfn break; 6Xz d>5x 0@[*~H0{n r
\[|'hA //count++; r{B28'f[ //if(count>4) ?pcbso // siteStop(); *o38f>aJl } [2YPV\= ' <xE0< &4+|{Zx0 System.err.println("文件下载结束!"); [V>s]c<4`o } m)LI|
v catch(Exception e){e.printStackTrace ();} ZJenwo } {6WG V2|By,. /G|v.#2/g //获得文件长度 Te[v+jgLY, public long getFileSize() VdGVEDwz { AorY#oq int nFileLength = -1; .k-6LR try{ 3y+~l
H: URL url = new URL(siteInfoBean.getSSiteURL()); 3tCTPZy HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); wP*3Hx;S httpConnection.setRequestProperty("User-Agent","NetFox"); C
#iZAR M.6uWwzQR sQj]#/yK: int responseCode=httpConnection.getResponseCode(); _"Z?O)d* if(responseCode>=400) N$=9R { Y<u%J#'[ processErrorCode(responseCode); LT
Pr8^ return -2; //-2 represent access is error Pc =ei } Nf<f}` !'~L dl ap'La|9t> String sHeader; tW4X+d" rdd-W>+
Igmg& for(int i=1;;i++) vanV |O { Sh1$AGm //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ;"u,G! //Utility.log(in.readLine()); k(pJVez sHeader=httpConnection.getHeaderFieldKey(i); pi~5}bF!a if(sHeader!=null) R6BbkYWrX { dQ7iieT if(sHeader.equals("Content-Length")) R.*;] R>M { zn 0y`9!n? nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 7Y[ q)lv break; xjiV9{w } %hN>o) } \1gAWUt(' else wW p7N break; :d9GkC } >;1w-n } f.uuXK catch(IOException e){e.printStackTrace ();} ]
1pIIX} catch(Exception e){e.printStackTrace ();} D.:`]W| u-|%K.A \t1#5 Utility.log(nFileLength); x%r$/= eu" m0Q lY"l6.c return nFileLength; ~EY)c~H } @,eo* T@.+bD U5N |2 //保存下载信息(文件指针位置) M&V4|D private void write_nPos() J)B3o$ { hWbu
Z% try{ DJgM>&Y6, output = new DataOutputStream(new FileOutputStream(tmpFile)); ^i#0aq2} output.writeInt(nStartPos.length); -s2)!Iko& for(int i=0;i<nStartPos.length;i++) Bj2iYk_cLa { g2TK(S|# // output.writeLong(nPos); eA(\#+)X ` output.writeLong(fileSplitterFetch.nStartPos); /nA>ox78 output.writeLong(fileSplitterFetch.nEndPos); NR(rr. } FT~c|ep. output.close(); ?>*d82yO } %A~. NNbS catch(IOException e){e.printStackTrace ();} _ps4-<ugC catch(Exception e){e.printStackTrace ();} 5)S;R, } jrN 5l1np p gLhxc: cJq{;~ //读取保存的下载信息(文件指针位置) eWm'eO private void read_nPos() !gLJBp { Z"Hq{?l9 try{ <ZZfN@6 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); eyDI>7W int nCount = input.readInt(); .aa7*e nStartPos = new long[nCount]; p%>!1_'( nEndPos = new long[nCount]; {`2 0' for(int i=0;i<nStartPos.length;i++) "7+^`? { E{JTy{z- nStartPos = input.readLong(); tQ;Fgv8Y! nEndPos = input.readLong(); 4%nK0FAj } \)\n5F:Zu input.close(); l>`S<rGe } !K*3bY`# catch(IOException e){e.printStackTrace ();} 4jZt0 catch(Exception e){e.printStackTrace ();} d:&cq8^ } v8E:64 ]A-LgDsS 78xiT private void processErrorCode(int nErrorCode) 5C`Vno~v { \J(~
Nv5! System.err.println("Error Code : " + nErrorCode); ]OKKR/: } JK^%V\m f~=e l3MA&&++KF //停止文件下载 C&d,|e "\ public void siteStop() ?=iy 6q { PB8U+ bStop = true; x51p'bNy for(int i=0;i<nStartPos.length;i++) ^JIs:\g<< fileSplitterFetch.splitterStop(); }F V_jJ \@ZD.d# S,+|A)\# } }darXtZKkK } 9WoTo ,q //负责部分文件的抓取 =x^IBLHN **FileSplitterFetch.java xWQQX */ :Z;kMrU package NetFox; q4/P'.S Fok`-U i"!j:YEo import java.io.*; gavf$be
import java.net.*; r`0oI66B/ #{bT=:3a Y5IQhV. public class FileSplitterFetch extends Thread { 3XjY Vc|QW ?y* yl String sURL; //File URL J72kjj&C long nStartPos; //File Snippet Start Position hdH-VR4 long nEndPos; //File Snippet End Position ''EFh&F int nThreadID; //Thread's ID 5Obv/C boolean bDownOver = false; //Downing is over `@ Ont+ boolean bStop = false; //Stop identical <M3&\ FileAccessI fileAccessI = null; //File Access interface #|l# <^A1.o<GN eNt1P`2[ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 7tT L,Nxe { cC`PmDGq this.sURL = sURL; 6CWm;%B#G this.nStartPos = nStart; ;&RHc#1F this.nEndPos = nEnd; H]f8W]"c[ nThreadID = id; 7}e{&\0=l fileAccessI = new FileAccessI(sName,nStartPos);//定位 2I~a{:O } UbwD2> oJ}$ /_ /{X2:g { public void run() QW@`4W0F { {D 8[pG%z while(nStartPos < nEndPos && !bStop) 0R?LWm
j { '%A*Z,f EtvYIfemr Zo5.Yse try{ mt3j$r{_ URL url = new URL(sURL); cf1GA HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ?pF uV`Zm httpConnection.setRequestProperty("User-Agent","NetFox"); > 1&_- String sProperty = "bytes="+nStartPos+"-"; 7
S2QTRvH httpConnection.setRequestProperty("RANGE",sProperty); Gl>_C@n0h Utility.log(sProperty); P"mD73a {B
lM< vwQ6= InputStream input = httpConnection.getInputStream(); !
.|\}= [e //logResponseHead(httpConnection); Bl)DuCV wi/dR}*A R~DZY{u+/$ byte[] b = new byte[1024]; 9i+SU|;j int nRead; 9AdA|/WV while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) J'>i3eLq { f"G?#dW/1 nStartPos += fileAccessI.write(b,0,nRead); a5xp[TlXn. //if(nThreadID == 1) ,] ,dOIOwn // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ENi@R\
p } zcNv T ^8yhx-mgb WwM/M!98J Utility.log("Thread " + nThreadID + " is over!"); YAf`Fnmw bDownOver = true; Xm2p<Xu8h //nPos = fileAccessI.write (b,0,nRead); k9<P]% } *^&2L,w catch(Exception e){e.printStackTrace ();} "R/Xv+; } sh %snLw } )tyhf(p6 -q.tU*xf' %kJ_o*" //打印回应的头信息 AG$S;)Yl9c public void logResponseHead(HttpURLConnection con) ^l4=/=RR { "NamP\hj for(int i=1;;i++) ]D;X"2I2'b { 8&"@6/)[ String header=con.getHeaderFieldKey(i); (0T6kD if(header!=null) SGREpOlJ+ //responseHeaders.put(header,httpConnection.getHeaderField(header)); X^U)j
N2 Utility.log(header+" : "+con.getHeaderField(header)); CcZ\QOet&C else Ol~jq;75 break; +JMB98+l } [y}0X^9,E } (*Jcx:rH H7KcPN(0 .'y]Ea public void splitterStop() (gv1f { 8_S<zE`Ha bStop = true; ~EVD NnHEr } p<2A4="& 6mnj!p]3 \lnps f }
w34&m ;L5'3+U ,[lS)`G /* gm63dE> **FileAccess.java CVh^~!"7j *//文件访问(定位,写) X/_e#H0
package NetFox; v:MJF*/ import java.io.*; #4ZDY,>Xi# "0F =txduS 06 kjJ4 public class FileAccessI implements Serializable{ gF@51K CF`tNA3fxm //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 `,mE
'3& RandomAccessFile oSavedFile; ]OE{qXr{ long nPos; #-ioLt% \>8"r,hG| T>l=0a # public FileAccessI() throws IOException Vj7(6'Hg { (%huWW
j this("",0); em } A#gmKS<J/7 }xx[=t=nUf Ds4n>V,o public FileAccessI(String sName,long nPos) throws IOException :xitV]1.
{ 6% @@~" oSavedFile = new RandomAccessFile(sName,"rw"); qNP&f8fH this.nPos = nPos; _7(>0GY oSavedFile.seek(nPos); (Yz EsY } .z
u0GsU= [:x^ffs *Z! #6(G public synchronized int write(byte[] b,int nStart,int nLen) Y%v?ROql { #>+O=YO int n = -1; #/NZ0IbHk try{ NPws^ oSavedFile.write(b,nStart,nLen); KJPCO0" n = nLen; U^trZ]) } 6b9 oSY-8 catch(IOException e) &>UI { { 6Y^UC2TBs e.printStackTrace (); _RT3Fk } xEN""*Q e_Na_l] UD|Qa return n; [hs_HYqJ } ]iewukB4 pp$WM\r
h:iK; } gF(aYuk 99%oY 0xbx2jlkY /* 8OoKP4,; **SiteInfoBean.java R}MdBE */ VG*Tdaua~ package NetFox; 0|g|k7c{rF vT)(#0>z V!#+Ti/w4 public class SiteInfoBean { .i[rd4MCK ~^((tT x8I=I"Sp private String sSiteURL; //Site's URL Az.(tJ X" private String sFilePath; //Saved File's Path {-*+G] private String sFileName; //Saved File's Name '_& Xemz private int nSplitter; //Count of Splited Downloading File tz&'!n}
~1xln?Q !+tz<9BBY public SiteInfoBean()
{ndL]c'v {//nSplitter的缺省值为5 R I Bj9kd //default value of nSplitter is 5 ydo"H9NOS this("","","",5); (q'w"q j } EoM}Co G8%Q$ {3@lvoDT public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) gqR?hZD { dI'cZt~n sSiteURL= sURL; O,(p><k$/ sFilePath = sPath; Fm(~Vt;%u sFileName = sName; #L[-WC]1y this.nSplitter = nSpiltter; o@TxDG B{'x2I#, b0
))->&2 } NZ:A?h2JR RD_IGV 7Io]2)V public String getSSiteURL() AfmGA9 { C2RR(n=N^ return sSiteURL; dIiQ^M } 8&FnXhZg4 N yT|=`; JBa( O-T public void setSSiteURL(String value) fpbb <Ro { :A%|'HxH3 sSiteURL = value; Sc
Uh
-y_ } k2Yh?OH ,H!E :k =fmM=@!$< public String getSFilePath() dKyJ.p { Kn~f$1 return sFilePath; %_xRS } )G$/II9d t,#9i#q# ycAQHY~n public void setSFilePath(String value) $_s"16s {
9?c0cwP? sFilePath = value; 69{^Vfd;Y } Y<%)Im6v/ 7\*_/[B P,y*H_@k public String getSFileName() "N'tmzifh { ] h3~>8< return sFileName; Oga/ } L&3Ak}sh K=x>%6W7b ,!U._ic'B public void setSFileName(String value) ;Awt: jF { ,Bh!|H(?L1 sFileName = value; XOsPKq } $j61IL3+ wc7gOrPpm M0[7>N_ public int getNSplitter() oNHbQ&h { f7B)iI! return nSplitter; SV%;w> } },9Hq~TA `I|$U)' &DoYz[q public void setNSplitter(int nCount) _U}pdzX? {
ismx evD nSplitter = nCount; ciRn"X=l } /VFh3n>I2 } ``*iK ];& @T\Rj 'Rbv3U /* ziUEA>m*/ **Utility.java #-S%aeB */ o6L eC* package NetFox; wc?`QX}I 64]_o/u5W4 %M"rc4Xd public class Utility { \\Ps*HN A")F7F31c zN2CI6 public Utility() Z$qLY<aV { +T]/4"^M a<%Ivqni J~.8.]gXW } MTm}qx@L z%ZAN- //线程睡眠 +<#0V!DM public static void sleep(int nSecond) X2CpA;#;7l { ^{f^%)X try{ WdQR^'b$ Thread.sleep(nSecond); S\$=b_. } XMt)\r. catch(Exception e) a=m4)tjk { D^]g`V*N e.printStackTrace (); .%~m|t+Rt } 0?@;zTE0 } =$kSvCjP h=<x%sie //日志 MaMP7O|W public static void log(String sMsg) C/34K( { e`]x?t<U4/ System.err.println(sMsg); pZeJ$3@vk } @\ udaZc /6Bm
<k% r.WQ6h/eZ5 public static void log(int sMsg) B!J~ t8 { o8uak*"{ System.err.println(sMsg); 6*W7I-A } t4Q&^AC } 2~ [ t,D7X1W E@.daUoB /* GXk]u **TestMethod.java &/+LY_r'<I */ OSu/!Iv\ package NetFox; ;W~H|M zCz"[9k $I*<gn9 public class TestMethod { pB(|Y]3A l&JV.}qGB8 V*d@@%u** public TestMethod() z^,P2kqK_ { ///xx/weblogic60b2_win.exe uW 7Yem& try{ {JGXdp:SB SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); K=K]R01/o //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); _keI0ML-# SiteFileFetch fileFetch = new SiteFileFetch(bean); u{J\X$] fileFetch.start(); }uFV\1 } (fqU73 catch(Exception e){e.printStackTrace ();} 3[*x'"Q;H ~pt#'65}: Pl/B#Sbf' } mb GL)NI Y@ l>4q") M&SY2\\TB public static void main(String[] args) *L{^em#b { 5>\Lk>rI new TestMethod(); ]^>RBegJBO } JT cE{i } P[K42mm 点击下载更多相关资料
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