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/* O'sr[ **SiteFileFetch.java |~"A:gf */ yOCcp+`T} package NetFox; 4`5Qt=} import java.io.*; E,yzy[gl import java.net.*; O t4+VbB6 R;-FZ@u/ "62Ysapq+ public class SiteFileFetch extends Thread { Go+,jT- $v}8lBCr3 ThqfZl=V SiteInfoBean siteInfoBean = null; //文件信息Bean ^[?+=1
k long[] nStartPos; //开始位置 D(ntVR long[] nEndPos; //结束位置 Bw/H'Y FileSplitterFetch[] fileSplitterFetch; //子线程对象 /dvnQW4}8 long nFileLength; //文件长度 e!x-:F#4j boolean bFirst = true; //是否第一次取文件 6_}){ZR boolean bStop = false; //停止标志 :>-sITeY File tmpFile; //文件下载的临时信息 uc (yos DataOutputStream output; //输出到文件的输出流 \S@=zII_ Z$=$oJzB //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ujp,D#xHP public SiteFileFetch(SiteInfoBean bean) throws IOException eq 1 4 { t:j07 ,1~ siteInfoBean = bean; 2,QApW_Y //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); kE(-vE9 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); QO`Sn N} if(tmpFile.exists ()) D30Z9_^%: { mM^8YL bFirst = false; T+`GOFx read_nPos(); ppo$&W
&z } A5H8+gATK else VS@W.0/ { xA1pDrfC/ nStartPos = new long[bean.getNSplitter()]; q}24U3ow nEndPos = new long[bean.getNSplitter()]; -bb7Y } @_:?N(%( v&/-&(+ zSvHv s m_ONsZHy } jE5
9h o6yZ@R O09g b[ public void run() C]cT*B^ { aZCZ/ //获得文件长度 T[9jTO?W2 //分割文件 2i'-lM= //实例FileSplitterFetch bzL;)H4Eo //启动FileSplitterFetch线程 ,?N_67 //等待子线程返回 V`&*%xgGR try{ FbNQ if(bFirst) ^WYG?/{4 { EjCzou nFileLength = getFileSize(); ]]QCJf@p if(nFileLength == -1) {_N(S]Z { 4)Wzj4qW System.err.println("File Length is not known!"); - OGy-" } #UnO~IE.m$ else if(nFileLength == -2) GM5 6xZ!2T { ~=gH7V System.err.println("File is not access!"); szs3x-g } :qKY@-t7H else 00x^zu?N { &XTd[_VW! for(int i=0;i<nStartPos.length;i++) 8}b[Q/h! { gK_[3FiKt nStartPos = (long)(i*(nFileLength/nStartPos.length)); b6M)qt9R } ill' KPy for(int i=0;i<nEndPos.length-1;i++) %iFIY=W { T{xo_u{Q nEndPos = nStartPos[i+1];
0
9'o } (zODV4,5k` nEndPos[nEndPos.length-1] = nFileLength; |y=F (6Z } ba:^zO^ } %SFR.U0}yK wq`Kyhk s|`)' //启动子线程 1ORi]` fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Q"_T040B for(int i=0;i<nStartPos.length;i++) ,'DrFlI { 6y!?xot fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), X(q=,^Mp siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ~a,' nStartPos,nEndPos,i); W
9MZ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m&c(N fileSplitterFetch.start(); Olh-(u:9+O } mK&9p{4#U // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6HQwL\r79 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); p%_
:( // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", nezbmpL4 nEndPos = " + nFileLength); yp'>+cLa // fileSplitterFetch[nPos.length-1].start(); 6u3(G j@ >x0lSL0y epyYo&x} //等待子线程结束 m)w-mc //int count = 0; qnV9TeU) //是否结束while循环 >5W"a?( boolean breakWhile = false; L 'Rapu y{P9k8v!z BkqW>[\5xm while(!bStop) ]a~LA7VHO { )f&]H} write_nPos(); 70(?X/5# Utility.sleep(500); Av4E?@R breakWhile = true; OEi9
)I Qj[O$L0 $ 4'|:SyOm for(int i=0;i<nStartPos.length;i++) 5W-M8dc6 { ;itg>\p3 if(!fileSplitterFetch.bDownOver) rmJ847%y` { <Wq{ V;$ breakWhile = false; /hR]aw break; o:*iT=l } ixpG[8s } mSeNM if(breakWhile) 2 -8:qmP( break; fbkjK`_q "b7C0NE {Oszq(A //count++; >:|q J$J. //if(count>4) Q(7l<z // siteStop(); _3>zi.J/ } zjE4v-H:l =LA@E&,j #E)]7!_XG System.err.println("文件下载结束!"); fdHxrH>* } y5h[^K3 catch(Exception e){e.printStackTrace ();} oPZ4}>uV } LRs;>O >*CK@"o F
x8)jBB_ //获得文件长度 ^2@~AD`&h public long getFileSize() (Ad!hyE( { JFdzA int nFileLength = -1; [)u{ - try{ I%xJ)fIK URL url = new URL(siteInfoBean.getSSiteURL()); IBsn>*ja< HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Z_+No :F7I httpConnection.setRequestProperty("User-Agent","NetFox"); `^{P,N>X 4/_|Qy $Bb/GXn{\ int responseCode=httpConnection.getResponseCode(); (DAJ(r~ if(responseCode>=400) 4f,x@:Jw { PCjY,O processErrorCode(responseCode); EV$n>. return -2; //-2 represent access is error "KwKO8f } GrC")Z|3u }C}_
I:=C UlytxWkUX String sHeader; w7u >|x! `$- Ib^ ZZ7U^#RT for(int i=1;;i++) d5hE!= { =<xbE;,0 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); k=_@1b- //Utility.log(in.readLine()); W -&5
v sHeader=httpConnection.getHeaderFieldKey(i); z& jDO ex if(sHeader!=null) ~V)E:( { ;_\P;s if(sHeader.equals("Content-Length")) HbVLL`06* { V;(LeuDH| nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); #CmBgxg+M break; Y1IlH8+0 } O2f2Fb$B7 } o5R40[" else U)8]pUI+/P break; <X*8Xzmv } -}o;Y)
} _#B/#^a catch(IOException e){e.printStackTrace ();} 5;Xrf= catch(Exception e){e.printStackTrace ();} ;"z>p25=T wt;aO_l xkovoTzV Utility.log(nFileLength);
jfamuu 7 B?Skw{& ;0'v`ob'.? return nFileLength; Z
ngJ9js } UepBXt3) OFv} jT 566Qikw2 //保存下载信息(文件指针位置) ) /'s&
D private void write_nPos() HxaUVg0 { IIkJ"Qg. try{ y
rk#)@/m output = new DataOutputStream(new FileOutputStream(tmpFile)); flqTx)xE output.writeInt(nStartPos.length); 5@ug1F& for(int i=0;i<nStartPos.length;i++) wn&2-m*a { X $f%Ss // output.writeLong(nPos); .EO1{2= output.writeLong(fileSplitterFetch.nStartPos); )VC) } output.writeLong(fileSplitterFetch.nEndPos); PQ>JoRs } T^_9R; output.close(); nCU4a1rZ } L_,U*Jyo catch(IOException e){e.printStackTrace ();} jL SZ#H catch(Exception e){e.printStackTrace ();} hLRQ) } Z]<_a)> <h({+N L%FL{G
//读取保存的下载信息(文件指针位置) #ZA
YP private void read_nPos() 30@ GFaab { ^dqEOW try{ 9&cZIP DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); [@6iStRg7 int nCount = input.readInt(); }^muAr nStartPos = new long[nCount]; e^ yB9b nEndPos = new long[nCount]; jxvVp*-=<j for(int i=0;i<nStartPos.length;i++) }JD(e}8$! { Npqb xb nStartPos = input.readLong(); %:*HzYf nEndPos = input.readLong(); ,"o\_{<z } H^G*5EQK input.close(); I?QKd@ } /V&Y@j catch(IOException e){e.printStackTrace ();} kN)ev?pQ[ catch(Exception e){e.printStackTrace ();} ~6tY\6$9f } e 3K 8T4J^6 PJ{.jWwD private void processErrorCode(int nErrorCode) 7
<xxOY>y { |Bp?"8%*l System.err.println("Error Code : " + nErrorCode); /!hW6u5 } $Tg$FfD6& ;QYK {3R? q)*0G* //停止文件下载 ArY'NE\Htt public void siteStop() '' 6 { 4rm/+Zes bStop = true; F~1R.r_Lu for(int i=0;i<nStartPos.length;i++) scdT/|(U$ fileSplitterFetch.splitterStop(); E_K7.c4M :R)IaJ6) DI_mF#5q } .
fIodk } H|Ems}b //负责部分文件的抓取 a|.u; **FileSplitterFetch.java ]l%j>Vb!L */ {F j`'0Xu; package NetFox; G;e}z&6<k C1=[\c~jw (k?OYz]c import java.io.*; cnR>)9sX import java.net.*; 5 F-Q& U:Y?2$# T1E{NgK public class FileSplitterFetch extends Thread { L" o6)N nV,a|V5Xm ;c`B' String sURL; //File URL `d8TA#|` long nStartPos; //File Snippet Start Position /y} long nEndPos; //File Snippet End Position -8IiQRS int nThreadID; //Thread's ID v,jU9D\ boolean bDownOver = false; //Downing is over <~d N23) boolean bStop = false; //Stop identical 4P8:aZM FileAccessI fileAccessI = null; //File Access interface y;;@T X .eE5pyw+C $)U
RY~;i public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException gnQd#` { 4t":WutC this.sURL = sURL; 1 !sYd@iD@ this.nStartPos = nStart; "P6MLf1 this.nEndPos = nEnd; /=N`P &R# nThreadID = id; <XNLeJdY fileAccessI = new FileAccessI(sName,nStartPos);//定位 y.zW>Mfl } {}z7N~ @bZb#,n] PJ'l:IU public void run() rZLMYM { +mJAIjH while(nStartPos < nEndPos && !bStop) >_@J&vC { IoC,\$s, [K5afnq` vQ;Z 0_ try{ 4
QWHGh" URL url = new URL(sURL); [lf[J&}X HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); m\(a{x httpConnection.setRequestProperty("User-Agent","NetFox"); w"~T5%p String sProperty = "bytes="+nStartPos+"-"; zIu1oF4[ httpConnection.setRequestProperty("RANGE",sProperty); H_{Yr+p Utility.log(sProperty); ,D8Tca\v FX{Sb" /O9z-!Jz InputStream input = httpConnection.getInputStream(); aa|xZ //logResponseHead(httpConnection); %EuSP0 `!i>fo~ <*L8kNykK byte[] b = new byte[1024]; K$4Ky&89
int nRead; =_5-z|< while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) [Mx+t3M { p|zW2L nStartPos += fileAccessI.write(b,0,nRead); s^cHR1^ //if(nThreadID == 1) [8ih-k // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); o.,hCg)X } "zugnim ?n}L+| c5JxKU_ Utility.log("Thread " + nThreadID + " is over!"); BwR)--75 bDownOver = true; IMj{n.y4 //nPos = fileAccessI.write (b,0,nRead); ;*8$BuD } .A E(D7d6 catch(Exception e){e.printStackTrace ();} Yv>% 5` } [,VD^\ } |g~.]2az xu3qX" Ra/S46$ //打印回应的头信息 Ta_#Rg*! public void logResponseHead(HttpURLConnection con) T!8,R{V]4 { *cf#:5Nl for(int i=1;;i++) SO|$X { Gd!y,n&s String header=con.getHeaderFieldKey(i); @>:r'Fmu- if(header!=null) O%OeYO69 //responseHeaders.put(header,httpConnection.getHeaderField(header)); 4oJ0,u Utility.log(header+" : "+con.getHeaderField(header)); tlj^0 else ,a}+Jj{ break; uKK+V6}!kj } JMXCyDy; } WawOap Ls( &. YM-,L-HMA public void splitterStop() -Wf 2m6t { )<%GHDWL bStop = true; T{Av[>M } LBTf}T\ iNcB6,++ 06ZyR@.@v } XLB7
E )Zox;}WK+ H?PaN)_6-+ /* d-X<+&VZ **FileAccess.java mk}8Cu4 *//文件访问(定位,写) 1$4dzI() package NetFox; f mf(5 import java.io.*; n* uT y6fYNB s_/CJ6s public class FileAccessI implements Serializable{ F.4xi+S_ C-&\qAo?<: //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 i!(u4wTFF RandomAccessFile oSavedFile; Tv!zqx#E long nPos; P9BShC5 RK< uAiU >HyZ~M public FileAccessI() throws IOException V3
2F { $/K<hT_ this("",0); "_W[X }
`ml U&GSMjqg p[>!;qI public FileAccessI(String sName,long nPos) throws IOException `@RTfBBg { _->d41 oSavedFile = new RandomAccessFile(sName,"rw"); EJrP{GH this.nPos = nPos; ';Y0qitGB oSavedFile.seek(nPos); Ko:<@h } !Wgi[VB !ap}+_IA7^ Ejmpg_kux public synchronized int write(byte[] b,int nStart,int nLen) ^?}-x { 1N,</<" int n = -1; qx|~H'UuBN try{ \(C6|-:GY oSavedFile.write(b,nStart,nLen); Z):q 1:y n = nLen; MR}=tO } 4}`z^P<C catch(IOException e) $i1$nc8 { B 1jeIk, e.printStackTrace (); -%,=%FBi~4 } yw\Q>~$n[= {OIB/ =bgWUu\F return n; kntYj}F( } #Pt_<?JtV qz95) 0~4Ww=# } E6XDn`: \xG_q>1_ @q]4]U) /* 6+!$x?5|NP **SiteInfoBean.java -!q^/ux */ TXdo,DPv7 package NetFox; {.eo?dQ {^8?fJ/L w{mw?0 public class SiteInfoBean { xu\s2x$ w$iQ,-- R#HVrzOO|T private String sSiteURL; //Site's URL xIA] 5@;a private String sFilePath; //Saved File's Path OYSq)!: private String sFileName; //Saved File's Name 'hR0JXy private int nSplitter; //Count of Splited Downloading File GHY+q{'#V_ ZmI0|r}QbY K
@RGvP public SiteInfoBean() DQ<4`wE M {//nSplitter的缺省值为5 nr&bpA/ //default value of nSplitter is 5 ijP`fM8 this("","","",5); .exBU1Yk@ } uP G\1 >$,P )cB' .d I".L public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) #lR-?Uh { $Q"D>Qf{G sSiteURL= sURL; P?p]sLrP sFilePath = sPath; |M`'
sFileName = sName; oR7[[H.4 this.nSplitter = nSpiltter; bmu] zJ _o[fjd pT{is.RM } :{+~i.* ^hXm=r4ozR KRz~3yH{c public String getSSiteURL() wx^Det { hC[=e`j return sSiteURL; kDol 1v` }
E;}&2 a 9U8x&Z]P ,Qx]_gZ` public void setSSiteURL(String value) `Fie'[F5,) { `JO>g=,4 sSiteURL = value; DQ(0:r } 7Xx3s@ n]df)a yts@cd`$ public String getSFilePath() R2v9gz;W { !(
>U3N return sFilePath; 2xf#@`U } ?a#Gn2 _V4O#;%? !KMl'kswe: public void setSFilePath(String value) <rtKPlb// { /jNvHo^B sFilePath = value; ! ui } ^3[_4av v^ "qr?3V BBM[Fy37!} public String getSFileName() ,`JYFh M { sC.b'1P return sFileName; Q7rBc
wm5 } (?m{G Q 2TUV9Z & XmaGtt public void setSFileName(String value) 1Gsh%0r3 { V$?6%\M^* sFileName = value; MgeC-XQM } YnEyL2SuU 2][9Wp 8ymdg\I+L public int getNSplitter() W'C>Fn}lO? { > Vm}u`x return nSplitter; ]l,D,d81 } z@,pT"rb |p:4s"NT S2$66xr# public void setNSplitter(int nCount) v\:AOY' { EpS/"adI-! nSplitter = nCount; t]h_w7!U } )]fsl_Yq } s<!A<+Sh V'kBF2} ]64Pk9z= /* //&3{B **Utility.java |/Vq{gxp+ */ 2u]G]:ml package NetFox; "S;4hO !]F`qS> bJ:5pBJ3 public class Utility { G<C D4:V A?MM9Y}K QNbZ) public Utility() y4kn2Mw; { 9C7Npf?~M ntIR #fB
e|tx`yA } sVh)Ofn WO>,=^zPJ //线程睡眠 g:!U,<C^a public static void sleep(int nSecond) "]eB2k_> { ]!TE try{ k+"]; Thread.sleep(nSecond);
:q/s%`ob } KH2]:&6:Q catch(Exception e) {iyJHY { #x.v)S e.printStackTrace (); !$NK7- } 8=D,`wog } \`y:#N<c ?l~qb]._ //日志 2D:/.9= 8v public static void log(String sMsg) |Ua);B ~F { ,=e.QAF!" System.err.println(sMsg); >~ *wPoW } "`;-5d g 6?xF!VIL 5@RcAQb: public static void log(int sMsg) f%PLR9Nh5@ { 3^P;mQ$p1 System.err.println(sMsg); >K'dgJ245 } f@`|2wG } R?1Z[N jwjLxt [.&JQ /* Z'A 3\f **TestMethod.java </kuJh\ */ </'n={+q package NetFox; ]-t>F t<dFH}U`w <cZ/_+H%C public class TestMethod { z4
=OR@ h )*_G/<N)| u3Z]!l public TestMethod() k5>UAea_ { ///xx/weblogic60b2_win.exe tQG'f*4 try{ E!ZLVR.K SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); eV%{XR?y //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); HY_>sD SiteFileFetch fileFetch = new SiteFileFetch(bean); i\;ZEM{ fileFetch.start(); *A`ZcO=
} <r <{4\%} catch(Exception e){e.printStackTrace ();} 5mV!mn:H: Pm#/j; i+5Qs-dHA } `oe=K{aX _1RvK? ;.{ ]["%e9#aX public static void main(String[] args) T*@o?U { 4<tbZP3/6) new TestMethod(); dn}EM7:Z } Ge({sy>X } v6DjNyg<x 点击下载更多相关资料
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