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/* &qV_|f; **SiteFileFetch.java .Zx7+`i */ VKr
oikz@] package NetFox; &RlYw#*1. import java.io.*; 6 w0r)
import java.net.*; ~gEd( )7F$:*e s=XqI@ public class SiteFileFetch extends Thread { mTa^At" V/8yW3]Xy <h~_7Dn SiteInfoBean siteInfoBean = null; //文件信息Bean "'c
=(P long[] nStartPos; //开始位置 sv*xO7D. long[] nEndPos; //结束位置 *L5L.: Ze FileSplitterFetch[] fileSplitterFetch; //子线程对象 z"!=A}i long nFileLength; //文件长度 B 3eNvUFZg boolean bFirst = true; //是否第一次取文件 L_AQS9a^D boolean bStop = false; //停止标志 c`V~?]I> File tmpFile; //文件下载的临时信息 M'xG.' DataOutputStream output; //输出到文件的输出流 Lw{'mtm HTP~5J //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) vFGVz public SiteFileFetch(SiteInfoBean bean) throws IOException ,)}-mu { iu'r c/=V siteInfoBean = bean; 3]/Y=A //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); `{\10j*B tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); i'0ol^~y6 if(tmpFile.exists ()) j"<F?k@`Q { [u8JqX bFirst = false; V[">SiOg read_nPos(); 1L.yh U\ } +C(/.X
Kz% else E2|c;{c { oz?6$oE(bt nStartPos = new long[bean.getNSplitter()]; M+\LH nEndPos = new long[bean.getNSplitter()]; 5?MKx!% } !%YV0O0 S]DYEL$ "cX*GTNi8 V,
e } p:qj.ukw ^ `Y1 qo0]7m7| public void run() q*{Dy1Tj { a EqDxr6 //获得文件长度 -cWxS{vO //分割文件 JOH=)+xj //实例FileSplitterFetch LwIX&\Ub //启动FileSplitterFetch线程 L3X[; |v} //等待子线程返回 f<( ysl1[ try{ n5 jzVv if(bFirst) y:8Oc? { z,=k F I nFileLength = getFileSize(); .JL?RH2@8 if(nFileLength == -1) RLbxNn { @&]%%o+ System.err.println("File Length is not known!"); Qtn%h:i
S~ } 2aO.t else if(nFileLength == -2) Hh.l,Z7i7D { V s1Z$HS` System.err.println("File is not access!"); TfqQh!Y } NpY zN|W: else [
f`V_1d3 { "npLl]XM for(int i=0;i<nStartPos.length;i++) . xdSUe { Tg.}rNA4 nStartPos = (long)(i*(nFileLength/nStartPos.length)); 626!6E;T } (SYSw%v$A for(int i=0;i<nEndPos.length-1;i++) <f`G@ { -AxO1
qO nEndPos = nStartPos[i+1]; ~m.@{Do0p } <lwkjt=RV nEndPos[nEndPos.length-1] = nFileLength; khtSZ"8X } j]5bs*G } v}\Nx[} ?)B\0` %*' y2,M9 //启动子线程 {QTnVS't 0 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 4&([<gyR< for(int i=0;i<nStartPos.length;i++) !5K9L(gqb { 9;u&,R fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }e* OprF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), X,h"%S<c#H nStartPos,nEndPos,i); K PSHBv-# Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ];1Mg fileSplitterFetch.start(); m`Ver:{ } 8z
h{?0 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), rik0F siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); $Y5m"wySZ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", d%: nEndPos = " + nFileLength); pT` oC& // fileSplitterFetch[nPos.length-1].start(); O
o+pi$W UMbM3m=\ L) ]|\| //等待子线程结束 mxJ& IV //int count = 0; qE&R.I!o //是否结束while循环 4R/cN'- boolean breakWhile = false; yk|<P\ fSFb)+ g",htYoEnj while(!bStop) [~<X|_LG { U6@Hgi> write_nPos(); B#T4m]E/ Utility.sleep(500); 8vLaSZ="[ breakWhile = true; Yq?FiE0 VgO:`bDF zg2}R4h for(int i=0;i<nStartPos.length;i++) ?@i_\<A2 { ]FNqNZ if(!fileSplitterFetch.bDownOver) sox0:9Oqnf { $Dm2>:Dmt breakWhile = false; j!:^+F/ break; &6`h%;a/& } 58@YWvAk } R6A{u( if(breakWhile) =k\V~8XZ break; fGtUr_D j:;[Y `2 :"9P {xe^ //count++; $R2iSu{kO //if(count>4) W5^m[,GU' // siteStop(); w+NdEE4H9z } MM*B.y~TxZ .A. VOf_ "[rChso System.err.println("文件下载结束!"); Hq*\,`b& } uwcm%N;I" catch(Exception e){e.printStackTrace ();} ^"e|)4_5\ } Is $I;` ^T#bla893 #ONad0T; //获得文件长度 .W#-Cl&n8 public long getFileSize() Oist>A$Z { <B?@,S> int nFileLength = -1; -<[MM2Y try{ j<-#a^jb URL url = new URL(siteInfoBean.getSSiteURL()); mu[:b HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); msyC."j0jU httpConnection.setRequestProperty("User-Agent","NetFox"); qBKRm0<W 1'[RrJ$Q J.r^"K\ int responseCode=httpConnection.getResponseCode(); -r6cK,WVU if(responseCode>=400) t0 1@h_WS { NT6OGBl& processErrorCode(responseCode); 1gwnG& return -2; //-2 represent access is error "+g9}g } IezOal O#,Uz2 GxL;@%B String sHeader; R; wq *oC],4y~D pu:Ie#xTDf for(int i=1;;i++) jo8hVWJ7V* { <,r|*pkhp~ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); %MQU&H9[ //Utility.log(in.readLine()); &o$z[b sHeader=httpConnection.getHeaderFieldKey(i); gkJL=, if(sHeader!=null) QxSJLi7t { h~]G6>D9)> if(sHeader.equals("Content-Length")) OO Hw-MW { ]ZD W+< nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); `u zR!^X break; "B~c/%#PH } '@$YX*[ } 0UJ%tPS else WUwH W break; []'gIF } 8!~8:?6n } g[]UM;D* catch(IOException e){e.printStackTrace ();} N%hV +># Z catch(Exception e){e.printStackTrace ();} eF[CiO8F2 Tq\S-K}4! Fgf5OHX Utility.log(nFileLength); 9w^lRbn 3C,G~)=
x -|ho
8alF return nFileLength; cmLGMlFT } raWs6b4Q ^PnXnH? r\OunGUP //保存下载信息(文件指针位置) WIe7>wkC private void write_nPos() cBZKt { n9
LTrhLqp try{ x)Y?kVw21" output = new DataOutputStream(new FileOutputStream(tmpFile)); iP7
Cku}l output.writeInt(nStartPos.length); 5s=ZA*(sY for(int i=0;i<nStartPos.length;i++) CFm(
yFk { NUlp4i~Q // output.writeLong(nPos); D5o[z:V7" output.writeLong(fileSplitterFetch.nStartPos); S>-x<'Os output.writeLong(fileSplitterFetch.nEndPos); Z*+0gJ<Y } i`m&X6)\j output.close(); ?ztI8I/ } BB x359 catch(IOException e){e.printStackTrace ();} XX85]49`% catch(Exception e){e.printStackTrace ();} BGtr= &Hq } B6N/nCvHK -C]k YQ
#41xzN //读取保存的下载信息(文件指针位置) ^#|Sl D] private void read_nPos() $pKlF0 . { KASuSg+ try{ +-DF3( DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); OcA_m. int nCount = input.readInt(); |WiE`&?xP nStartPos = new long[nCount]; hA6
nEndPos = new long[nCount]; z%)~s/2Rs for(int i=0;i<nStartPos.length;i++) 1JRM@ !x { rq>}]
U nStartPos = input.readLong(); )\S3Q nEndPos = input.readLong(); o!]muO*Rm } QKW\z aG input.close(); 5r&bk` } }Y}f73-| catch(IOException e){e.printStackTrace ();} }McqoZ%F catch(Exception e){e.printStackTrace ();} :3J0Q } ~XzT~WxW ;PS V3Zh v qt#JdPp9 private void processErrorCode(int nErrorCode) 'n:|D7t { Vu0d\l^$ System.err.println("Error Code : " + nErrorCode); M id v } yQT
cO^E u|ph_?6o 1zGD~[M //停止文件下载 O$qxo
& public void siteStop() &kR*J<)V { 8t1XZ bStop = true; S55h}5Y for(int i=0;i<nStartPos.length;i++) \;!}z3W w fileSplitterFetch.splitterStop(); J?wCqA y%Q0*
_ Bi.,@7|> } j8cIpbp8x } ^n|yfvR //负责部分文件的抓取 3X;k c> **FileSplitterFetch.java w#XD4kwQG */ "{;E+-/
aL package NetFox; wtl3Ex,DO =JkPE2mU diz=|g=w import java.io.*; Wbq0K6X import java.net.*; 5*O*p `Ba 43VBx<" NJNS8\4 public class FileSplitterFetch extends Thread { _%@dlT? AV>_bw. |p .o ^ String sURL; //File URL [!~=m long nStartPos; //File Snippet Start Position !*?|*\B^I long nEndPos; //File Snippet End Position ]c9\[Kdq}H int nThreadID; //Thread's ID &<=?O
a boolean bDownOver = false; //Downing is over wit
rC> boolean bStop = false; //Stop identical HBdZE7.x)3 FileAccessI fileAccessI = null; //File Access interface CN{xh=2qY[ d-sT+4o} Q$yMU[l) public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 5%_aN_1?ef { 22T\-g{ this.sURL = sURL; h-f`as"d this.nStartPos = nStart; `f[ this.nEndPos = nEnd; EED0U? nThreadID = id; :>|dE%/e$ fileAccessI = new FileAccessI(sName,nStartPos);//定位 `j1b5&N;7 } 0"F|) YYN'LF#j 4St-Q]Y _ public void run() &-$27 { fTOGW`s^ while(nStartPos < nEndPos && !bStop) 7DKTd^^M { 83adnm +SB>> :R-_EY$k6 try{ %/4_|.8u URL url = new URL(sURL); ]vflx^<? HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); xZ]QT3U+ httpConnection.setRequestProperty("User-Agent","NetFox"); Yyr
qO^9m String sProperty = "bytes="+nStartPos+"-"; k-N}tk/5 httpConnection.setRequestProperty("RANGE",sProperty); !X[P)/?b0+ Utility.log(sProperty); ,Y4>$:#n/ &7
K= Vb8Qh601 InputStream input = httpConnection.getInputStream(); &z]x\4#, //logResponseHead(httpConnection); H%b c.c L>Y3t1= ;u-[%(00S byte[] b = new byte[1024]; 2<T/N int nRead; LPeVr^ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) -N'wKT5 { F%:74.]Y nStartPos += fileAccessI.write(b,0,nRead); l*$~Y0 //if(nThreadID == 1) bZ>dr{%%e // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _P`
^B } T)I\?hqTB <}p]0iA WfXwI 'y Utility.log("Thread " + nThreadID + " is over!"); '~9w<dSB!r bDownOver = true; `Frr?.3&- //nPos = fileAccessI.write (b,0,nRead); !,^y!+,Qy } x*sDp3f[* catch(Exception e){e.printStackTrace ();} ;:,U]@ } ?Rk[P
cX< } uznYLS ICEyz|
C D$AvD7_ //打印回应的头信息 1u8hnG public void logResponseHead(HttpURLConnection con) +MqJJuWB { O I0N(V for(int i=1;;i++) 'T|EwrS j { !Ln 'Mi_B String header=con.getHeaderFieldKey(i); hD[r6c if(header!=null) AHo }K\O?r //responseHeaders.put(header,httpConnection.getHeaderField(header)); (;;.[4,y Utility.log(header+" : "+con.getHeaderField(header)); f5Hv![x else >"+ho break; Q;s{M{u } ]8htL#C } 4T TrHs +c8t~2tuN P}^Y"zF2 public void splitterStop() (5;nA' { g t9(5p bStop = true; ucJ}KMz } NM9,AG ify48] \:g\?[ } 0CvGpM, B]NcY&A 2acTw# /* ${rWDZ0Z **FileAccess.java k 1a?yH)= *//文件访问(定位,写) Ai"MJ6) package NetFox; qW4DW4 import java.io.*; dW22v! >& 4) : /1p5KVTKv public class FileAccessI implements Serializable{ ff7#LeB9 <5"&]!
. //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ^We}i RandomAccessFile oSavedFile; +_{cq@c long nPos; { P,hH~! %gQUog V'gJtF public FileAccessI() throws IOException lQiw8qD { bIlNA )g this("",0); &uF~t
|!c } 1KY0hAx 5
1N/XEk =''WA:,=h public FileAccessI(String sName,long nPos) throws IOException Ir-QD!!< { XdmpfUR,13 oSavedFile = new RandomAccessFile(sName,"rw"); P*B@it this.nPos = nPos; 2
6DX4 oSavedFile.seek(nPos); 5}Id[%.x } ;5.<M<PH ?PS?_+E\L Lq$ig8V:O7 public synchronized int write(byte[] b,int nStart,int nLen) yMu G? x+ { (7N!Jvg9 int n = -1; 71>,tq try{ 7_P33l8y
oSavedFile.write(b,nStart,nLen); {8qcM8 n = nLen; zRd.!Rv } zy%0;% catch(IOException e) "O-X*>?f { oc]:Ty e.printStackTrace (); 2 S~( P } {]cr.y]\ D/Ok ';Q8x?BS return n; iqdU?&.; } hJ]Oa7r |/H?\]7 =4'V}p } MUsF 9a=>gEF],@ f^*Yqa /* NtM ?Jh **SiteInfoBean.java Zj-U^6^L */ 1x=x,lcL package NetFox; 7V8k = RD"-(T }:{9!RMO public class SiteInfoBean { j{r@>g;3 ?>U=bA N&p0Emg private String sSiteURL; //Site's URL (&Jo.
< private String sFilePath; //Saved File's Path (CRx'R
private String sFileName; //Saved File's Name Bm,Vu 1]t private int nSplitter; //Count of Splited Downloading File $OdBuJA 'tw
]jMD GS=E6 public SiteInfoBean() x>B\2; {//nSplitter的缺省值为5 ^\Z+Xq1~/ //default value of nSplitter is 5 [T,^l#S1 this("","","",5); eUZk|be } 3~bB2APk WA,D=)GP gSw4\ R public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Ex
z B{" { "^6Fh"] sSiteURL= sURL; O1c:X7lHc sFilePath = sPath; HV)aVkr/& sFileName = sName; &z1U0uk this.nSplitter = nSpiltter; tuIZYp8tIN ,pI9=e@O/z HUD0
@HQI } Li}5aK hHmm(~5gR R'`'q1=R public String getSSiteURL() {pH# zs4Y { *E/ Mf
return sSiteURL; ~WTk X(\ } 8ta@@h C0/^ 6Lu"o /q\e&&e public void setSSiteURL(String value) ~a[/l { bA,Zfsr6# sSiteURL = value; mi<Q3;m } X*@ tp,t `j@1]%&z pXl[I; public String getSFilePath() 18sc|t { 5]LWWjT return sFilePath; _3@5@1[s } K&%CeUa vE'{?C=EM :K]7(y7> public void setSFilePath(String value) jhf3(hx&F { 9/29>K_ sFilePath = value; ceE]^X;p } c?HUW ^@AyC"K RYEZ'< public String getSFileName() I:iMRvp { N4C7I1ihq return sFileName; =n"k gn } |EX=Rj* }q@#M8 b i,*m(C@F} public void setSFileName(String value) 9;U?_ {
t kj sFileName = value; Y /_CPY } LZe)_9$ Na/Y1RW iOURS public int getNSplitter() w'(/dr { Xj/z), return nSplitter; *"8Ls0! } B+`4UfB]Z} )xyjQ|b %r(WS_%K| public void setNSplitter(int nCount) )e?&'wa> { lUs$I{2_ nSplitter = nCount; u3+B/ 5x } tj@(0}pi4 } 1B2#uhT]r v>} +->f b^d{$eoH?| /* H"l4b4)N\ **Utility.java rvd$4l^ */ WqNXE)' package NetFox; %/y=_G #mu L-V (~^fx\-S public class Utility { 2uE<mjCt-r f(m,! 7amVnR1f public Utility() |cma7q}p { OY`B{jV- KN|<yF }<A.zwB<i } Cr7Zi>sd<! 6^]| //线程睡眠 <@-O06 public static void sleep(int nSecond) 8O,\8:I# { Yao}Xo9} try{ f?sm~PwC- Thread.sleep(nSecond); o2ggHZe/=@ } Bxm,?=h catch(Exception e) (CxA5u1|l { :uo1QavO@, e.printStackTrace (); N2}SR|. } H/O.h@E4X } Kk8}m; ~U&NY7.@ //日志 AYA{_^#+3 public static void log(String sMsg) ,D+ydr { W%g*sc*+ System.err.println(sMsg); I1E9E$m5\< } ljNwt ! dzgi: 2@zduL'do_ public static void log(int sMsg) Sf, z { pD$4nH4KST System.err.println(sMsg); Iy9hBAg\y } c
3QgX4vq } VyxYv-$Y 1XSnnkJm Pq omi!1 /* p,fV .5q **TestMethod.java Wm}c-GD */ V^2_]VFj package NetFox; =#G
2}8mQD t_3j_` Q*smH-Sw public class TestMethod { m;OvOc, j~qm$ 'H X,|8Wpi= public TestMethod() FXof9fa_B { ///xx/weblogic60b2_win.exe YJ _eE try{ C$y6^/7) SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); YvU%OO-+, //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); cJ96{+ SiteFileFetch fileFetch = new SiteFileFetch(bean); p`Pa;=L fileFetch.start(); ~$HB}/ } Y_'ERqQ catch(Exception e){e.printStackTrace ();} x4'@U< 7s|'NTp I@'[> t } g<:Lcg"u JY0aE >H;i#!9, public static void main(String[] args) FQ<-Wc { 7]h %?W! new TestMethod(); h&<"jCjL } $xbC^ k } 9pp+<c 点击下载更多相关资料
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