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/* S([De"y **SiteFileFetch.java mZ%\`H+ */ re2%e-F" package NetFox; 1owoh,V6 import java.io.*; 6ZJQ '9f import java.net.*; 7Q&P4{hi0 )LUl? g;1
UZE; public class SiteFileFetch extends Thread { I-I5^s ;!b(b% FeJ5^Gh. SiteInfoBean siteInfoBean = null; //文件信息Bean 9EW 7,m{A long[] nStartPos; //开始位置 L M[<?`%p long[] nEndPos; //结束位置 |,crQ'N' FileSplitterFetch[] fileSplitterFetch; //子线程对象 }W J`q`g long nFileLength; //文件长度 Urr1K) boolean bFirst = true; //是否第一次取文件 eX/$[SL[ boolean bStop = false; //停止标志 UgJHSl File tmpFile; //文件下载的临时信息 ~Hf,MLMdTf DataOutputStream output; //输出到文件的输出流 |ipppE= _4w%U[GT, //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 'tj4 ;+xf^ public SiteFileFetch(SiteInfoBean bean) throws IOException IG\\RYr { /e,lD) siteInfoBean = bean; Hqk2W*UTl //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); )sr]}S0 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ]
D(3 if(tmpFile.exists ()) ;DOz92X94 { TfOZ>uR"g bFirst = false; %]` W sG read_nPos(); pD9c%P } +J}M$eQ else 8,Z0J { 6Xa2A6 nStartPos = new long[bean.getNSplitter()]; uBXI*51{ nEndPos = new long[bean.getNSplitter()]; b~p < } \$I
)} e#
DAa gYZgo xHmc8G$zu } ? "gy`oCv 6r`g+Js/ h=aHZ6v public void run() d>}%A
] { 4C$,X!kzF //获得文件长度 _<8y^ymo //分割文件 @QEVl //实例FileSplitterFetch s?G@k} { //启动FileSplitterFetch线程 , /pE*Yk //等待子线程返回 !
^W|;bq try{ r]yq
#T`z if(bFirst) ,^(T^ - { ,DjZDw nFileLength = getFileSize(); u'C4d6\wS if(nFileLength == -1) .T7ciD { Kj7Osqu2bE System.err.println("File Length is not known!"); hH\(>4l } Zo`^pQS else if(nFileLength == -2) )xeVoAg { t
t=$:}A System.err.println("File is not access!"); t%%I.zIV7 } `u-}E9{ else lZ|Ao0( { &xVWN>bd^ for(int i=0;i<nStartPos.length;i++) !dGgLU_ { 9D
bp`%j nStartPos = (long)(i*(nFileLength/nStartPos.length)); Kr<O7t0X } 6\bbP>ql for(int i=0;i<nEndPos.length-1;i++) s}.nh>Q {
Hi9]M3Ub nEndPos = nStartPos[i+1]; OCd[P1Y] } _MR2,mC nEndPos[nEndPos.length-1] = nFileLength; >2rFURcD } J]%P
fWV } `U1"WcN nL$tXm-x Au
{`oxD //启动子线程 zAH+{4lC+ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; biJU r^n for(int i=0;i<nStartPos.length;i++) %ug`dZ/ { t :_7O7 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), w NPZ[V: siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), |(/"IS] nStartPos,nEndPos,i); F"q3p4-<> Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 1)%o:Xy o fileSplitterFetch.start(); </fnbyGR } w-KtxG( // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), QMIQy siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); BdceINI // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", $6_J`7 nEndPos = " + nFileLength); \6N\6=t!A // fileSplitterFetch[nPos.length-1].start(); ?TXFOr]g]2 bx@CzXre; -{O2Nv- ]] //等待子线程结束 6Hz=VhQrN //int count = 0; f7`y*9^ //是否结束while循环 sU8D;ML7 boolean breakWhile = false; Qcw/>LaL: k_skn3,u \+,jM6l}- while(!bStop) BKIt,7j { a; "+Py write_nPos(); 27MgwX
NQ Utility.sleep(500); %VdJ<=@ breakWhile = true; qP"m819m 1q*3V8 {\%x{ for(int i=0;i<nStartPos.length;i++) .VI2V-Q { a+X X?uN{ if(!fileSplitterFetch.bDownOver) a\zbi$S { r1[0#5kJ;J breakWhile = false; 2]7nw1& break; !,\]> c } N=wB1gJ } 5%Q!R% if(breakWhile) A}%sF MA break; 8mV35A7l W6)A":` "];19]x6q //count++; q[+]; //if(count>4) ,
w_ Ew // siteStop(); shi#K<gVC } eVy,7go h 9;@6iv 8T%z{ A1T System.err.println("文件下载结束!"); old}}>_ } <mpkkCl, catch(Exception e){e.printStackTrace ();} ;xb:{? } EZ$m4:{e k`N)-`O7 eX=W+&lj //获得文件长度 AttDD{Ta public long getFileSize() ^@N@gB { fQv^=DI# int nFileLength = -1; L:S[QwQu8 try{ <5nz:B/ URL url = new URL(siteInfoBean.getSSiteURL()); $idYG<], HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @ )1u httpConnection.setRequestProperty("User-Agent","NetFox"); s Ce{V*ua j/9'L^] a.q= int responseCode=httpConnection.getResponseCode(); SL*B `P~{ if(responseCode>=400) @P%&Dha { wL}=$DN processErrorCode(responseCode); TEY%OIzU+ return -2; //-2 represent access is error M*t{?o/t; } RhYf+?2 2r1.,1 rHP5;j<] String sHeader; chxO*G ,l~i|_ (pAGS{{ for(int i=1;;i++) l2$6ojpo { Peb;XI //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); dC)@v]#h //Utility.log(in.readLine()); GUMO;rZs sHeader=httpConnection.getHeaderFieldKey(i); ?-6oh~W< if(sHeader!=null) z0c_&@uj* { 8)T.[AP if(sHeader.equals("Content-Length")) >R
:Bkf- { O[$&]>x]] nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 8E|S`I break; (A?/D!y } wVp } edA.Va|0 else :dB6/@fW break; x%0Q W } 40mgB4I } m&fm<?| catch(IOException e){e.printStackTrace ();} U"/":w ~ catch(Exception e){e.printStackTrace ();} >8EIm Td?a=yu:J \= i>}Sg Utility.log(nFileLength); O9jqeF`L= 4R.rSsAH RH~KaV3 return nFileLength; 10t9Qv/ } S)p1[&" M 3s"x{mtH 81`-xVd //保存下载信息(文件指针位置) ;j S~0R private void write_nPos() I)T]}et { Ub0g{ try{ iku) otUc output = new DataOutputStream(new FileOutputStream(tmpFile)); aO6w:IO output.writeInt(nStartPos.length); RP!X5 for(int i=0;i<nStartPos.length;i++) %i$]S`A} { F~4oPB K< // output.writeLong(nPos); BlMc<k output.writeLong(fileSplitterFetch.nStartPos); cjp
H
hoW output.writeLong(fileSplitterFetch.nEndPos); n-0RA~5z } $fL2w^ @ output.close(); "/g/Lc } a|{RK}|3 catch(IOException e){e.printStackTrace ();} ^GHA,cSf catch(Exception e){e.printStackTrace ();} qE!.C}L+ } ,~>A>J Y2HF 1r'skmxq //读取保存的下载信息(文件指针位置) \= =rdW- private void read_nPos() 8 Zhx& { *+rO3% ;t try{ ;(5b5PA DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); iW9G0Ay int nCount = input.readInt(); '+JU(x{CCl nStartPos = new long[nCount]; N8_
c%6GE nEndPos = new long[nCount]; rK7m( for(int i=0;i<nStartPos.length;i++) 9Eu.Y { 5Ay\s:hb[u nStartPos = input.readLong(); F=bX\T7 nEndPos = input.readLong(); *;5P65:u$> } 1#/>[B input.close(); <XDYnWz } &3#19v7/ catch(IOException e){e.printStackTrace ();} x(ue
|UG catch(Exception e){e.printStackTrace ();} /J9|.];%r } vu Vcv
H}Z\r2 5R"iF+p4 private void processErrorCode(int nErrorCode) t Y'fFz^Ho { 2Sz?r d,0f System.err.println("Error Code : " + nErrorCode); Bs:INvhYW } R9xhO! #0GvL=}k g
67;O(3 //停止文件下载 ~|QhWgq public void siteStop() P;GRk6 { ER-X1fD bStop = true; gn4+$ f~w for(int i=0;i<nStartPos.length;i++) gE;r;#Jt4 fileSplitterFetch.splitterStop(); C3>&O?7J*7 P+K< /i ^--kcTiR% } _!2bZ:emG } XA PqRJ*Z //负责部分文件的抓取 mhpaPin*JS **FileSplitterFetch.java %zsY=qT */ @ A?Ss8p' package NetFox; tX)l_?jVH %s&l^&ux N/CL?Z>c import java.io.*; ny'?Hl'Q import java.net.*; J'4Pp< \k&2nYVHf kn9ul3c public class FileSplitterFetch extends Thread { QmxI;l /zV&ebN] ;=r_R!d@ String sURL; //File URL p`N+9t&I4 long nStartPos; //File Snippet Start Position fXD9w1 long nEndPos; //File Snippet End Position >JVdL\3 int nThreadID; //Thread's ID ~$w9L998+ boolean bDownOver = false; //Downing is over zp.-=)D4e boolean bStop = false; //Stop identical tr?U/YG FileAccessI fileAccessI = null; //File Access interface e,V @t% ;xqN#mqq wX/0.aZ | public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException z'"e|) { Es]:-TR this.sURL = sURL; !:BmDX[<n this.nStartPos = nStart; ?5VPV9EX this.nEndPos = nEnd; '/O >#1 nThreadID = id; ^W#161& fileAccessI = new FileAccessI(sName,nStartPos);//定位 yVZLZLm } `|=hl~ WtS5i7:<Y 3:wN^!A}ve public void run() C6` Tck! { UmEc")3 while(nStartPos < nEndPos && !bStop) b;xn0sDn# { s]X0}"cz r{g8CIwGQ C!X"0]@FA try{ ~$PY6s URL url = new URL(sURL); 8@rddk HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ar{7H)V: httpConnection.setRequestProperty("User-Agent","NetFox"); Rq@M~;p String sProperty = "bytes="+nStartPos+"-"; (Y!{ UNq5 httpConnection.setRequestProperty("RANGE",sProperty); +YD_ L Utility.log(sProperty); 0)Nu +%sMd]$,n /Pv
dP#! InputStream input = httpConnection.getInputStream(); CNMcQP //logResponseHead(httpConnection); VPi*9(LS &dsXK~9M> xwSi.~. byte[] b = new byte[1024]; i(O+XQ}Fyx int nRead; 2p|ed=ly% while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) )JA9bR
< { y?Cq{( nStartPos += fileAccessI.write(b,0,nRead); 2r^G;,{ //if(nThreadID == 1) ;X;q8J^_K_ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {J~VB~(' } OrPi ("/ BWF>;*Xro $ VTk0J-W Utility.log("Thread " + nThreadID + " is over!"); u;G-46 bDownOver = true; 2QIx~Er //nPos = fileAccessI.write (b,0,nRead); Ci9]#)"c } %n B}Hq ; catch(Exception e){e.printStackTrace ();} hEhvA6f, } <rI8O;\H } C.`!?CW *N65B# \p.eY)> //打印回应的头信息 Gr&YzbSX public void logResponseHead(HttpURLConnection con) bDtb"V8e { %LjhK,'h for(int i=1;;i++) \%/Y(YVm { &"6%D|Z0 String header=con.getHeaderFieldKey(i); +bdjZD3 if(header!=null) L)"E _ //responseHeaders.put(header,httpConnection.getHeaderField(header)); FE'F@aS\ Utility.log(header+" : "+con.getHeaderField(header)); 1| XC$0 else |SX31T9rG break; R LNto5? } Vw";< <0HZ } Mwtd<7<!A hMnJH_siY $+WMKv@< public void splitterStop() IeT1Jwe { ]@A31P4t| bStop = true; }cO}H2m } \f4JIsZ-& 68QA%m'J 6Eu"T9( } \5DOp-2
ovsI2 #`qP7E w /* \Xpq=2` **FileAccess.java jM[]Uh *//文件访问(定位,写) uRnSwJ"hE package NetFox; ?#gYu%7DN import java.io.*; >A.m`w 2)T.Ci cx fI }v}L^ public class FileAccessI implements Serializable{ <IwfiI3y
%Z-B{I( //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 =bh.V@* RandomAccessFile oSavedFile; ~]78R!HJ long nPos; <G60R^o i p;
RlO -F&*>?I public FileAccessI() throws IOException lG R6S { chszP{-@X this("",0); bM>5=Zox } T :0#se F.$NYr/|y }%Vx2Q public FileAccessI(String sName,long nPos) throws IOException ay>u``$R { ,}23 oSavedFile = new RandomAccessFile(sName,"rw"); XK,l9 {* this.nPos = nPos; ;@s'JSPt oSavedFile.seek(nPos); nO;t5d } $E6bu4I JAU:Wqlg1 bR}=bp4K public synchronized int write(byte[] b,int nStart,int nLen) f0ME$:2 { VQ/Jz5^ int n = -1; "
"{#~X} try{ Zp_vv@s oSavedFile.write(b,nStart,nLen); EL:Az~]V n = nLen; uoMDf{d } [`U9 catch(IOException e) dW9Ci"~v { g1(`a`M e.printStackTrace (); gaVQ3NqF } cUD}SOW A5kz(pj 'D[g{LkL return n; CAtdx! } TKrh3
D)GD9MJ s^>1rV]=(` } $[M5Vv YdF\*tZ ~O~R,h> /* p?Jx2(%m **SiteInfoBean.java ,+o*>fD */ W8Aii'Q8C/ package NetFox; wJ> 2} &!KW[]i%9} 69JC!du public class SiteInfoBean { *c'hmAs `>N_A!pr` .!yw@kg private String sSiteURL; //Site's URL 7!jbID~ private String sFilePath; //Saved File's Path BjAmM*k private String sFileName; //Saved File's Name M'}iIO`L private int nSplitter; //Count of Splited Downloading File 3}V-'!
cRS2v--\- B^lm'/,@ public SiteInfoBean() (C60HbL {//nSplitter的缺省值为5 zMbz_22* //default value of nSplitter is 5 65AG#O5R this("","","",5); D9-D%R, } D/TEx2.=J3 G;yh$n<" f) @-X! public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ^gd[U C-"w { 2P ic 4Z sSiteURL= sURL; jLCZ
JSK sFilePath = sPath; :}3;z'2]l sFileName = sName; [RFF&uy this.nSplitter = nSpiltter; \iM 6U[bAp k/mO(i%qi } >q^l nWb0S D/Hob public String getSSiteURL() |nq}# { V>:ubl8j0l return sSiteURL; ]}HuK# } mrId`<L5l{ 6ujePi <U #P5tTCM public void setSSiteURL(String value) !/wR[`s9w { E'wJ+X9 + sSiteURL = value; ar[*!:! } = 6^phZ( 3e7P
w`gLl \&.]!!Q public String getSFilePath() 1k?k{Ri { iES?}K/q return sFilePath; a@}A;y'd } %VmHw~xyF: 0
V3`rK e
QGhX( public void setSFilePath(String value) oY8S-N;(t { 9~6)u=4sS" sFilePath = value; N_eZz#); } *g~\lFX,u c0Oc-,6J j_Qkw ? public String getSFileName() C,#FH} { \\9$1yg return sFileName; ?/ Cl } |)+;d N;.}g*_+} i{5,mS& public void setSFileName(String value) "*N=aHsj { Kt\#|-{CH- sFileName = value; T~JE.Y3B3 } 1@vlbgLr@ '98 0. NB[(O# public int getNSplitter() L-QzC<[F/ { ;!H|0sv return nSplitter; b$k|D)_| } Cp[
NVmN bL"!z"NA Kb5 Y A public void setNSplitter(int nCount) M^3pJ=;5 { qt{{q nSplitter = nCount; RJO40&Z<Z } v cZg3:j } :UDT!
5FNO 2!E@Gbhm5 q#!]5 /* JOvRUDZ **Utility.java <C6*-j1oz */ AHl1{*
[ package NetFox; [d}AlG! (M,IgSn9 F|3iKK022 public class Utility { /Xo8 kC u[;,~eB%w **! public Utility() Gn7P` t*. { mpysnKH =
gbB)u-Pc xQK;3b } 9/_ F \n`)>- //线程睡眠 AQ`
`Dp public static void sleep(int nSecond) !Ey= { 3sy|pa try{ r}]%(D](v Thread.sleep(nSecond); W`2Xn?g } Y&JK*d catch(Exception e) n13#}i{tm { "x
P2GZ e.printStackTrace (); 1*o=I-nOa } l=.h]]`; } MrGq{,6C >*FH JCe //日志 XwNJHOaF public static void log(String sMsg) 5B76D12 { C~:@ETcbil System.err.println(sMsg); DtrR< &m } ~vMdIZ.h $VRVMY [q <yq
kJ public static void log(int sMsg) 4'
MmT' { y
+2 System.err.println(sMsg); ]#*S. r] } 2\/,X CQV } 5gZ6H/. ]:X# w0UR Tb@r@j:V /* IqW4Q1>f **TestMethod.java *~>}* */ Ub_!~tb}? package NetFox; ].e4a;pt !/;/ X\d 7u|X
.X public class TestMethod { Z|k>)pv@ t5"g 9`A L UG5AFZ\ public TestMethod() i3[%]_eP. { ///xx/weblogic60b2_win.exe lNwqWOWy try{ T1YCld SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); m2|%AD //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 6 J
B"qd SiteFileFetch fileFetch = new SiteFileFetch(bean); pSC\[%K fileFetch.start(); 4
[K"e{W3 } o,D7$WzL catch(Exception e){e.printStackTrace ();} <jwQ&fm)/R 8uq`^l%KkZ W7PL]5y& } =}1)/gcM uihU)]+@t/ 7kDqgod^A public static void main(String[] args) 1](PuQm7+ { "AcC\iq new TestMethod(); suF<VJ)&s } ](2\w9i% } L)qDtXd4 点击下载更多相关资料
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