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/* m`&6[[)6~ **SiteFileFetch.java 8a;;MJ) */ ffy,ds_7 package NetFox; t=IM"ZgfL import java.io.*; 0ZJrK\K; import java.net.*; 6m0-he~ 9Xe|*bT 9~v#]Q}Z}4 public class SiteFileFetch extends Thread { uoq|l F;ELsg Dco3`4pl SiteInfoBean siteInfoBean = null; //文件信息Bean CqLAtS X7 long[] nStartPos; //开始位置 8Xa{.y" long[] nEndPos; //结束位置 \7WZFh%: FileSplitterFetch[] fileSplitterFetch; //子线程对象 lm8<0*;, long nFileLength; //文件长度 ({<qs}H" boolean bFirst = true; //是否第一次取文件 | MXRNA~ boolean bStop = false; //停止标志 UYH&x:WEd File tmpFile; //文件下载的临时信息 QSx4M DataOutputStream output; //输出到文件的输出流 %GigRA@no $r1{Nh //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) /6FPiASbS public SiteFileFetch(SiteInfoBean bean) throws IOException X\|h:ce { OouR4 siteInfoBean = bean; yK>s]65& //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); >mMmc!u>G tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); V9;O1 if(tmpFile.exists ()) ;F:Qz^=.a { ejpSbVJ bFirst = false; <3 I0$?xL read_nPos(); ~}Z'/zCZf } r12e26_Ab else snVeOe#'S { oz'^.+uvE nStartPos = new long[bean.getNSplitter()];
-+n?Q; nEndPos = new long[bean.getNSplitter()]; 7#sb},J{ } Uc0Sb ]GiDfYs7% o(YF`;OhvS Lf+3nN } CTZ#QiNP to#T+d.(v ui&^ m, public void run() ]g]~!": { %(~8a //获得文件长度 A}CpyRVCn //分割文件 U=N]XwjVK< //实例FileSplitterFetch Fv3:J~Yf //启动FileSplitterFetch线程 L{u1_ //等待子线程返回 "v+%F try{ p><DA fB if(bFirst) `l-R?C?*! { "uU[I,h nFileLength = getFileSize(); q;<Q-jr&O if(nFileLength == -1) (RLJ_M|;/b { (*G'~gSX System.err.println("File Length is not known!"); R]y9>5 'U } 89fl\18% else if(nFileLength == -2) v]m#+E { (h27SLYm System.err.println("File is not access!"); t_iZ\_8 } 7VA6J-T else W4S]2P>T { 9|2LuHQu+ for(int i=0;i<nStartPos.length;i++) U/:x<Y$ tj { A[ N>T\ nStartPos = (long)(i*(nFileLength/nStartPos.length)); F
<.} q|b } vW03nt86 for(int i=0;i<nEndPos.length-1;i++) .KxE>lJbqM { ?sbM= oo nEndPos = nStartPos[i+1]; KDYyLkI dr } fqZ+CzH nEndPos[nEndPos.length-1] = nFileLength; C/!8NV1:4 } (^= Hq'D } (=w ff5U 0@2pw2{Ru hJ0m;j&4y //启动子线程 Yd$64d7,h fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; N0fXO for(int i=0;i<nStartPos.length;i++) K9Bi2/N { 5h>t4 [~ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /[Sy;wn siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), vQL)I nStartPos,nEndPos,i); #mbl4a Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); !'
jXN82 fileSplitterFetch.start(); ybVdWOqv } $:<G= // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), bn8?- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ` L?9-)m<f // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", (1}"I
RX. nEndPos = " + nFileLength); 6T=zHFf~ // fileSplitterFetch[nPos.length-1].start(); {y7,n !GBGC|avE
b6gD*w< //等待子线程结束 Mta;6< //int count = 0; ]@7]mu:oL //是否结束while循环 eZ
+uW0 boolean breakWhile = false; \ /6m Ia>>b #h b}jLI_R{ while(!bStop) U-GV^j { ^1NtvQe@Y\ write_nPos(); |cq%eN Utility.sleep(500); AZadNuL/ breakWhile = true; T#w *5Qf s*W)BK|+? ]<\; -i) for(int i=0;i<nStartPos.length;i++) 7`6JK { IXmO1*o@ if(!fileSplitterFetch.bDownOver) ti9cfv> { !YEU<9 breakWhile = false; G/C5o=cY break; g@7j<UY } =Pgu?WU@ } 1">]w2je: if(breakWhile) m1lfC break; "6%vVi6 4C_-MJI 5s2334G //count++; bNO/CD4 //if(count>4) D^H<)5d9 // siteStop(); 1MzOHE } Rd.[8#7VE G0eJ<*|_ 3 Ig6>+Mw System.err.println("文件下载结束!"); s%~p?_P } MF^I] 7_ catch(Exception e){e.printStackTrace ();} ()+;KF8 } 5-pz/%, er0ClvB n"{oj7E0a //获得文件长度 v]HiG_C public long getFileSize() U%na^Wu { -/#tQ~{gs int nFileLength = -1; <ArP_!
`3 try{ C&ivjFf URL url = new URL(siteInfoBean.getSSiteURL()); v`$9;9 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); WtTwY8HC httpConnection.setRequestProperty("User-Agent","NetFox"); X*'-^WM6 ~ ]q^Akq W[3)B(Vq<E int responseCode=httpConnection.getResponseCode(); kM\O2ay if(responseCode>=400) <ST#<
$% { k&P_ c processErrorCode(responseCode); GX
lFS#` return -2; //-2 represent access is error fE/8;v!= } -j_J1P0, :B'}#;8_
:{tvAdMl7 String sHeader; l<$c.GgFd V ;)q?ZHg -W+67@(\8H for(int i=1;;i++) w{"GA~= { a4}2^K //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); p=(;WnsK //Utility.log(in.readLine()); M_4g%uHG sHeader=httpConnection.getHeaderFieldKey(i); PaFJw5f if(sHeader!=null) W+~ w { .SdEhW15) if(sHeader.equals("Content-Length")) wQ,RZO3 { "ppT<8Qi' nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); VPTT*a` break; RfB""b8]= } =#<hT
s } ?s5zTT0U>$ else y6o^ Knl break; sy`:wp } (r.{v@h,dV } v; ;X2 a1k catch(IOException e){e.printStackTrace ();} puv*p%E catch(Exception e){e.printStackTrace ();} ^F~e?^s szwXr K`FgU7g{ Utility.log(nFileLength);
Tc)T0dRP %f&(U/ ~&~%q u return nFileLength; .so{ RI } l1N{ujM ;NRT
a* = sIR[V'( //保存下载信息(文件指针位置) 9hT^Y,c0 private void write_nPos() y+?tUSPP { IR%a+;Xs try{ 9kP!O_ output = new DataOutputStream(new FileOutputStream(tmpFile)); vmOXB#7W output.writeInt(nStartPos.length); 9VN@M for(int i=0;i<nStartPos.length;i++) <E
BgHD) { +c\s%Gzrh // output.writeLong(nPos); vd /_`l.D output.writeLong(fileSplitterFetch.nStartPos); KW&&AuPb} output.writeLong(fileSplitterFetch.nEndPos); r[Q$w> } n a2"Sy=Yi output.close(); &bj :,$@ } =tH+e7it catch(IOException e){e.printStackTrace ();} [ylGNuy catch(Exception e){e.printStackTrace ();} VSZ 6;&2^ } im+2)9f _'H<zZo u ?g!E."v //读取保存的下载信息(文件指针位置) H8K<.RY private void read_nPos() P+3G*M=} { ".xai.trr try{ s80_e DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); /@RnCjc' int nCount = input.readInt(); uU.9*B=H9 nStartPos = new long[nCount]; #K!Df%,< nEndPos = new long[nCount]; pLzsL>6h for(int i=0;i<nStartPos.length;i++) &,."=G { ?GFxJ6!%I nStartPos = input.readLong(); ].dTEzL9X nEndPos = input.readLong(); y=vH8D]%X } 9'toj%XQ input.close(); Hs=!.tZ, } {|xwvTlJ catch(IOException e){e.printStackTrace ();} qW7"qw= catch(Exception e){e.printStackTrace ();}
A]U] } ;$&-c/]F# sD{b0mZT L''0`a. +S private void processErrorCode(int nErrorCode) `6mHt6"h { fe37T@ System.err.println("Error Code : " + nErrorCode); "}SERC7 } Lf 0Hz") y-n\;d>[(
}aNiO85 //停止文件下载 }7=a,1T public void siteStop() D hZtiqL#_ { Xq>e]#gR bStop = true; -;P<Q`{I for(int i=0;i<nStartPos.length;i++)
kw-/h+lG fileSplitterFetch.splitterStop(); Rc6
)v b7AuKY{L uaPBM< } Msd!4TrBJ } Km <Wh= //负责部分文件的抓取 X^|oY]D **FileSplitterFetch.java zK-hNDFL{ */ \aZ(@eF@@Q package NetFox; 0= 'DDy Ab2g),;c CY>NU import java.io.*; l(]\[}.5 import java.net.*; 5&X ZHC sv]l [QZ~~(R public class FileSplitterFetch extends Thread { 2/7=@>| %o"Rcw| [BQw$8+n_ String sURL; //File URL gs8L/veP long nStartPos; //File Snippet Start Position K%pmE?%,8 long nEndPos; //File Snippet End Position #dpt= int nThreadID; //Thread's ID q5vs;,_
| boolean bDownOver = false; //Downing is over /2@%:b) boolean bStop = false; //Stop identical >|Jw,,uf FileAccessI fileAccessI = null; //File Access interface 4|$D.`Wu D} .t 3-mw-;. public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException phc1AN=[E { f0D Ch] this.sURL = sURL; $k`8Zx w this.nStartPos = nStart; @^` <iTK&p this.nEndPos = nEnd; 4*+EUJ| nThreadID = id; 7@lXN8_f fileAccessI = new FileAccessI(sName,nStartPos);//定位 ]F@md(J } }a9C/t3 Nr[Rp \OU+Kl< public void run() li%-9Jd { &16bZw while(nStartPos < nEndPos && !bStop) M)J *Df0@ { ^X&9"x)4 \W}EyA lTB!yF.r| try{ Pj.~|5gnf URL url = new URL(sURL); ,#E5 /'c` HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); oba*w; httpConnection.setRequestProperty("User-Agent","NetFox"); jO,<7FPs5 String sProperty = "bytes="+nStartPos+"-"; =wj~6:Bf httpConnection.setRequestProperty("RANGE",sProperty); WD\{Sdx:r Utility.log(sProperty); 0wkLM-lN llleo8 k_a'a)`$6 InputStream input = httpConnection.getInputStream(); t<|s& //logResponseHead(httpConnection); .u*].As= t~M<j|]k y[|g!9Rp byte[] b = new byte[1024]; =+"'=o int nRead; <=inogf while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) o 4b{>x { DrEtnt nStartPos += fileAccessI.write(b,0,nRead); tbPPI)lu //if(nThreadID == 1) p&4n3%(R@ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); >o} ati } s =5H.q%PV q],R6GcVr P\s+2/ Utility.log("Thread " + nThreadID + " is over!"); jkP70Is bDownOver = true; KNg5Ptk //nPos = fileAccessI.write (b,0,nRead); 5qr!OEF2 } 1ZL_;k catch(Exception e){e.printStackTrace ();} fv_wK_.
%: } GiZ'IDV } !p&'so^-W SNU
bY6 AY;+Ws //打印回应的头信息 v 2 GhR* public void logResponseHead(HttpURLConnection con) ^<VE5OM { z`5I1#PVA for(int i=1;;i++) Ozv.;}SE { vs@:L)GW\
String header=con.getHeaderFieldKey(i); 7:L~n(QpP if(header!=null) 668bJ.M\O //responseHeaders.put(header,httpConnection.getHeaderField(header)); U(N$6{i_ Utility.log(header+" : "+con.getHeaderField(header)); M([H\^\: else \!QF9dP4 break; =Yj[MVn } lkZC?--H } 5 WppV3; u-9t s _;q-+"6L; public void splitterStop() `fkrik { %'T>kz *A bStop = true; 2jZ}VCzRG } 48g^~{T4O JYr7;n'! }AiS83B } YhT1P fl nh=Us^xD arLl8G[ /* (<C%5xk **FileAccess.java 6h_ k`z *//文件访问(定位,写) |<|,RI? package NetFox; V3W85_* import java.io.*; NydW9r:T YB{E=\~ mY8=qkZE public class FileAccessI implements Serializable{ >ij4z
N /V<`L //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 rgzI RandomAccessFile oSavedFile; dO4#BDn"= long nPos; ]0i2]=J&, pmyM&'#Id Au._n,< public FileAccessI() throws IOException +@uC:3jM { ^Ai_/! " this("",0); .r| vz6tU? } &E &iaw! \ui^
d 4D8y b|o public FileAccessI(String sName,long nPos) throws IOException I!7.fuO { W:poUG1UR oSavedFile = new RandomAccessFile(sName,"rw"); /e sk this.nPos = nPos; m=.7f9 oSavedFile.seek(nPos); OEE{JVeI } y}-S~Ov>I .(1j!B4^ 0^&R7Rv c public synchronized int write(byte[] b,int nStart,int nLen) xnQGCw?S&} { O4PdN? int n = -1; :_\!t45 try{ E9d i oSavedFile.write(b,nStart,nLen); quGPk)c n = nLen;
01c/;B } i5<Va@ru!s catch(IOException e) Wx|6A#cg! { <oaBh)=7 e.printStackTrace (); }
o"_#\6 } . 02(O HjK<)q8b ?*R^?[ return n; ?3TK7]1V: } (bFWT_CChz KO]?>>5S6 l6B ^sc*@ } gqdB!l4 KaQq[a :y-0qzD? /* mERZ_[a2 **SiteInfoBean.java _ K+V?-= */ A[ECa{v package NetFox; 2V2x,! UE,~_hp %cr]ZR public class SiteInfoBean { PDq}Tq 8P<UO 9MtJo.A private String sSiteURL; //Site's URL Ul713Bjz private String sFilePath; //Saved File's Path {8Jk=)(md private String sFileName; //Saved File's Name <#p|z`N private int nSplitter; //Count of Splited Downloading File
h[|zs>p dI
ZTLb"a C3b0`|5 public SiteInfoBean() mf]( 3ZL {//nSplitter的缺省值为5 E2h;hr;W //default value of nSplitter is 5 WQLHjGehe this("","","",5); t2-nCRXEP } }M9DqZ;I Nzi/3r7m R3{*v =ov public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) [mB(GL { rxgVT4 sSiteURL= sURL; tY$ty0y-e sFilePath = sPath; X|1_0 sFileName = sName; Xk&F4BJQk< this.nSplitter = nSpiltter; /romTK4 "'}v 0*[ f0mH|tI` }
+ptF - ;+ Co!L IQlw 914
public String getSSiteURL() 3dxnh,]&@ { yrE,,N%I return sSiteURL; F'UguC"> } Dmm r]~ fs3-rXoB CVGOX z public void setSSiteURL(String value) bco[L@6G$ { y800(z sSiteURL = value; nT@6g|! } orQV' 17n+4J] 6N%L8Q public String getSFilePath() SZK)q { 4gv.E 0Fo return sFilePath; yYG3/Z3u5 } A1|7(Sow A^4kYOe EBIa%, public void setSFilePath(String value) vNK`Y|u@ { ezg^5o; sFilePath = value; p'Y&Z?8 } '?`@7Eol u1pc5 Y{ \=EY@*= public String getSFileName() [DotS\p!z { u>t|X}JH return sFileName; @`IXu$Wm( } '!+P{ gI^L
9jE7 ^EC)~HP@C public void setSFileName(String value) M}=s3[d(, { }rKJeOo^x? sFileName = value; ,#P,B;r~ } &Hlm{FHU k%Ma4_Z <m Ju v public int getNSplitter() +3/k/W
{ *w'q return nSplitter; Q3NPwM } DnG/ n &O+sK4P f!M[awj% public void setNSplitter(int nCount) h V|v6 _ { Z^'?|qFj! nSplitter = nCount; &J lpA<^s; } J8GXI :y } P7'oXtW{o KrdZEi vb
}@rg5$W /* QD.zU/F~> **Utility.java dN]Zs9] */ inr%XS/m package NetFox; 2Y E;m& 4T-,'P{? KMxNH,5 public class Utility { 6?3/Ul} J{Y6fHFi IgPV# public Utility() ^eTDD { T:K" #D|!
.I) Z/89&Uy`h } lj
"Z >\|kJ?h //线程睡眠 YVQ_tCC_! public static void sleep(int nSecond) la
G$v-r { YBYB OH try{ a)3O? Y Thread.sleep(nSecond); Vl5SL{+D } ZNzR`6} catch(Exception e)
_'!aj+{ { &\;<t,3A~ e.printStackTrace (); u @{E{ } pY+.SuM } 7ei>L]gm% L.C
^E7;Z_ //日志 zY7*[!c2 public static void log(String sMsg) (v|r'B9b { BA~a?"HS System.err.println(sMsg); T"L0Iy!k; } Ys"|</;dbj .dD9&n;#^ B<|:K\MA public static void log(int sMsg) .ocx(_3G { Zu\p;!e System.err.println(sMsg); 2Pbe~[ } Q)x?B]b- } w{k1Y+1 RL?u n}Qa u]
F70C^~ /* :7 qqjs
**TestMethod.java Jt##rVN */ zq,iLoY[R package NetFox; ayV6m >;&Gz-lm |HrM_h<X public class TestMethod { ;EgzC^2e `^v4zWDK
S304ncS|M public TestMethod() u9TzZ { ///xx/weblogic60b2_win.exe G 6Wx3~ try{ ( MB`hk-d SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); M
(+.$uz //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); l%rx#;=u SiteFileFetch fileFetch = new SiteFileFetch(bean); cqeR<len fileFetch.start(); /SnynZ.q } :|Z$3q catch(Exception e){e.printStackTrace ();} R;H?gE^m- 1a<]$tZk J__;.rnk } ykxbX q^Z~IZ8IT +p13xc?#j public static void main(String[] args) -G8c5b[ { VBu8}}Ql new TestMethod(); z)5S^{( } 'dkXYtKCB } #2h+dk$1 点击下载更多相关资料
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