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/* 3Pa3f >}- **SiteFileFetch.java r'PE5xqF */ lYdQB[l package NetFox; jqqaw import java.io.*; j Q^Yj"6 import java.net.*; :%>oe> _" yI *M[0 q|/!0MU" public class SiteFileFetch extends Thread { {V=vnL-- o]
S`+ZcV Lqq*Nr SiteInfoBean siteInfoBean = null; //文件信息Bean
B,:23[v long[] nStartPos; //开始位置 -MUQ\pZ long[] nEndPos; //结束位置 Ol_/uy1r[ FileSplitterFetch[] fileSplitterFetch; //子线程对象 l]/> `62 long nFileLength; //文件长度 "1CGO@AXS boolean bFirst = true; //是否第一次取文件 R>` ih&,) boolean bStop = false; //停止标志 8|Q4-VK<! File tmpFile; //文件下载的临时信息 5bF5~D(E DataOutputStream output; //输出到文件的输出流 JN)"2}SE B
;;cbY //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) P$F#,Cn public SiteFileFetch(SiteInfoBean bean) throws IOException =^"~$[z( { k~ZBJ+
94 siteInfoBean = bean; dvxf lLd @ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); %!D_q~"H tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); &F9OZMK= if(tmpFile.exists ())
{\F2*P { DZF[dxH bFirst = false; @eA %(C read_nPos(); mnQal>0~ } JJ)y2 else 0.3^ { Y9/{0TArG nStartPos = new long[bean.getNSplitter()]; #fJwC7 4 nEndPos = new long[bean.getNSplitter()]; <&*#famX } -.^= Z!=M YcEtgpz@ z`;&bg\8 ,q/tyGj } HarYV : ,K`E&hS K%k XS public void run() ttTI#Fr2 { C8!8u?k //获得文件长度 5XhK#X%:A //分割文件 SxnIX/]J //实例FileSplitterFetch jM{(8aUG //启动FileSplitterFetch线程 J~M H_N //等待子线程返回 <=#lRZW[z try{ 1y_fQ+\2A if(bFirst) EKV+?jj$ { hw EZj`9 nFileLength = getFileSize(); aslU`#" if(nFileLength == -1) ^ uKnP>*l { e4[-rkn{hl System.err.println("File Length is not known!"); Xp<A@2wt? } uEc0/a :. else if(nFileLength == -2) c,+L + { Aqx3!
System.err.println("File is not access!"); Tb5$ } wUh3Hd' else 6M
O|s1zk { .rt8]% for(int i=0;i<nStartPos.length;i++) e|2vb
GQ { ,6S_&<{ nStartPos = (long)(i*(nFileLength/nStartPos.length));
'7S!6kd? } .E?bH V for(int i=0;i<nEndPos.length-1;i++) lBizC5t!o { (= S"Kvb~# nEndPos = nStartPos[i+1]; ^KaqvG$ed } z v L>(R nEndPos[nEndPos.length-1] = nFileLength; 1 2%z3/i } h(+m<J } ~`nm<
=;'ope(?S F[o+p|nF //启动子线程 &hSnB~hi fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 2)HxW}o for(int i=0;i<nStartPos.length;i++) 1NE!=;VOl { q\\8b{~ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), tEpIyC siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 1kz9>;Ud6 nStartPos,nEndPos,i); #;qFPj- v Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); doxdRYKL fileSplitterFetch.start(); |o; j0 } glOqft&>` // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), X~IRpzC siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [[/ }1% // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", wHBHkz nEndPos = " + nFileLength); CrRQPgl+u // fileSplitterFetch[nPos.length-1].start(); 60U{ e}Mkb !0!P.Q8>& mMD$X[: //等待子线程结束 zR3lX}g //int count = 0; PMz{8
F //是否结束while循环 []6ShcqJ[v boolean breakWhile = false; r?Zy-yQ C{d8~6 `g4Ekp'Rp[ while(!bStop) pQ[o3p!&9 { !_^{udB} write_nPos(); !9e\O5PmO Utility.sleep(500); '0])7jq breakWhile = true; Q5`+eQ?_\ eCPKpVhP 36x5 q 1 for(int i=0;i<nStartPos.length;i++) 34+)-\ xt: { VrnK)za*H if(!fileSplitterFetch.bDownOver) )$9C` d[ { ecSdU> breakWhile = false; .Y^d9. break; .NNcc4+ } HiS,q0 } }e/[$!35 if(breakWhile) vJ'yz#tl9 break; 4cErk)F4 Yq)YS] m&8U4uHN //count++; [#,X$O> //if(count>4) K8yyxJ // siteStop(); +aXk^+~j } l7D4`i<F j"D0nG, Mi%1+ System.err.println("文件下载结束!"); mhJOR'2 } k?|F0e_ catch(Exception e){e.printStackTrace ();} DS[l,x } Chb4VoE npG+#z Rrs`h `'- //获得文件长度 +lDGr/ public long getFileSize() RB$ 8^# { 'wT./&Z int nFileLength = -1; gR_b~^ try{ l;][Q]Z@V URL url = new URL(siteInfoBean.getSSiteURL()); 2Xj-A\Oh~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); v#<+n{B httpConnection.setRequestProperty("User-Agent","NetFox"); *~t$k56 ?:;hTY L2/<+Zw int responseCode=httpConnection.getResponseCode(); [r~rIb%Zj if(responseCode>=400) ;t@ 3Go { vCU&yXGl processErrorCode(responseCode); 1vR#FE? return -2; //-2 represent access is error 5@%=LPV } ^&G O4u qdkTg: QJ, )l!&i?h% String sHeader; UNZVu~WnF m?R+Z6c[ pS|JDMo for(int i=1;;i++) L+0N@`nRF { as!|8JE` //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); in;+d~? //Utility.log(in.readLine()); I+4qu|0lA sHeader=httpConnection.getHeaderFieldKey(i); .*wjkirF#~ if(sHeader!=null) [F>n!`8 { C7*Yg$`{ if(sHeader.equals("Content-Length")) 2QuypVC ] { bl=*3qB nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Dil4ut-$ break; {*]=qSz } T?}=k{C] } q&Ua(I
else GPhwq n{ break; qpEC!~y } cJE>;a } b!tZ bX# catch(IOException e){e.printStackTrace ();} u #QSa$P catch(Exception e){e.printStackTrace ();} 1p5q}">z `9"jHw`D x?k |i}Q Utility.log(nFileLength); '`A67bdq) ne~#{q AxqTPx7`| return nFileLength; oO9iB:w } Z.Y8 z#[xg HBkQ`T *q9$SDm //保存下载信息(文件指针位置) [zt&8g private void write_nPos() &(U=O?r7 { KqIe8bi^G try{ Fl(ZKpSZU output = new DataOutputStream(new FileOutputStream(tmpFile)); hdDI%3vk3 output.writeInt(nStartPos.length); VQJ5$4a& for(int i=0;i<nStartPos.length;i++) v?' k)B { sy#j+gZ
// output.writeLong(nPos); ;."{0gq output.writeLong(fileSplitterFetch.nStartPos); Yy:sZJ output.writeLong(fileSplitterFetch.nEndPos); k5\
zGsol } "+"dALX{3K output.close(); {y%O_-C'r } W$ {sD|d- catch(IOException e){e.printStackTrace ();} F,$$N> catch(Exception e){e.printStackTrace ();} X~VZ61vNu } 6E%k{ r H0Xda.Y( yq^$H^_O
p //读取保存的下载信息(文件指针位置) Ho{?m^ private void read_nPos() Zl/+HU~ { ?4dd|n try{ ag4^y& DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ApB'O;5 int nCount = input.readInt(); e"09b<69 nStartPos = new long[nCount]; (.t:sn"P nEndPos = new long[nCount]; _E-GHj>k
z for(int i=0;i<nStartPos.length;i++) eh=bClk { BU .G~0 nStartPos = input.readLong(); @y%qQe/g nEndPos = input.readLong(); a.ME{:a% } 5{=MUU=
input.close();
C_&tOt } 35\0g& catch(IOException e){e.printStackTrace ();} N1+]3kt ~ catch(Exception e){e.printStackTrace ();} g9`ytWmM } 5Ww\h
DGUU1vA Lg53
Ms% private void processErrorCode(int nErrorCode) QpZhxp { D{}\7qe System.err.println("Error Code : " + nErrorCode); cE#Y,-f } }jXUd=.Nu l0,O4k2 ' nP
/$uj //停止文件下载 qd;f]ndo public void siteStop() 'S
;vv]}Gs { N{@eV][Q bStop = true; DA\O,^49h for(int i=0;i<nStartPos.length;i++) 2^+"GCo fileSplitterFetch.splitterStop(); >l[N]CQ rGO3 kE|#mI[> } ot6Pq} } J)+eEmrU //负责部分文件的抓取 +d15a%^` **FileSplitterFetch.java !pXz-hxKT */ b s*Z{R package NetFox; a+Nd%hoe A` 8If ]+S QS^4 import java.io.*; )FCqYCfk import java.net.*; n(MEG'9} O2B$c\pw [J#(k`@ public class FileSplitterFetch extends Thread { F3'G9Xf8Q= &c!-C_L 2 1jb@nxRjO String sURL; //File URL )<&QcO_ long nStartPos; //File Snippet Start Position woKdI)f$ long nEndPos; //File Snippet End Position C,rZ}- int nThreadID; //Thread's ID t$2{U boolean bDownOver = false; //Downing is over z@j&vW boolean bStop = false; //Stop identical Ky|0IKE8Z FileAccessI fileAccessI = null; //File Access interface BcWReyO<M ];YOP%2 ZG|T-r;~ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException !{LwX Kf { k[m-"I%ZFX this.sURL = sURL; S7*:eo this.nStartPos = nStart; )*B.y|b# this.nEndPos = nEnd; 6]*qx5m`<l nThreadID = id; fQh!1 R fileAccessI = new FileAccessI(sName,nStartPos);//定位 I`l<}M } .#}R$}e+ :n4x}% gB#t"s) public void run() 8?!Vr1x { N 2\,6 < while(nStartPos < nEndPos && !bStop) Qpc>5p![3 { XR(kR{yo M'sJ5;^5
BN0))p try{ ic+iTH URL url = new URL(sURL); Rh|&{Tf HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Bb6_['y httpConnection.setRequestProperty("User-Agent","NetFox"); =:DNb( String sProperty = "bytes="+nStartPos+"-"; qdh D6#r httpConnection.setRequestProperty("RANGE",sProperty); a,.9eHf Utility.log(sProperty); 3-0Y<++W3> vnE,}(M 3mWN?fC InputStream input = httpConnection.getInputStream(); *hba>LZ //logResponseHead(httpConnection); sE% n=Ww _kfApO)O q%l<Hw6{z byte[] b = new byte[1024]; b1+Nm int nRead; />$kDe while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) q-H]Hxv { G|V ^C_: nStartPos += fileAccessI.write(b,0,nRead); e>/PW&Z8Z //if(nThreadID == 1) wp$=lU{B // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); G 7u85cie } h4U .wk hM-qC|! v?}/WKe+0 Utility.log("Thread " + nThreadID + " is over!"); z
'j%.Dd8 bDownOver = true; xZhh%~ //nPos = fileAccessI.write (b,0,nRead); V'8
(}(s/ } %H54^Z<y catch(Exception e){e.printStackTrace ();} `y4+OXZ^ } C M(g4fh } 0W@C!mD~ !|SawT5t HRk+2'wjAz //打印回应的头信息 .d;/6HD[y public void logResponseHead(HttpURLConnection con) kC)dia{$ { (1ebE for(int i=1;;i++) =6>mlI>i { *ood3M[M^ String header=con.getHeaderFieldKey(i); vg<_U&N=-r if(header!=null) l ^{]pD //responseHeaders.put(header,httpConnection.getHeaderField(header)); u
VB&DE Utility.log(header+" : "+con.getHeaderField(header)); |b|p0Z%7{ else Q-AN~k8+)[ break; 7kO
1d{u6b } <I7UyCAF } & )Z JT.S P;h/)-q8
!9-dS=:Y public void splitterStop() L_/.b%0) { Mb-C DPT bStop = true; tUzuel* } &_ber ad xi ^_C!*J p[cC%3 } <~3@+EEM O*CKyW_$t U]_1yX /* FJ/kumq **FileAccess.java k(et b# *//文件访问(定位,写) oo`mVRVf package NetFox; $L(,q!DvH import java.io.*; ${e{# z`{x1*w_ g=b'T- public class FileAccessI implements Serializable{ V;.=O}Lr nlh%O@, //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 oA`Ncu5 RandomAccessFile oSavedFile; V_h, UYN long nPos; .DHPKz`W0 s3oK[:/ IU&n!5d$)| public FileAccessI() throws IOException .^uNzN~ { GDhg
VOW( this("",0); L_Om<LO2 } wTqgH@rGtR *&!&Y*Jzg ONg_3vD{ public FileAccessI(String sName,long nPos) throws IOException TtlZum\ { uPt({H oSavedFile = new RandomAccessFile(sName,"rw"); j%0D:jOY] this.nPos = nPos; 3(jI oSavedFile.seek(nPos); :D;BA } W
A-\2 .*i.Z rdSkGb public synchronized int write(byte[] b,int nStart,int nLen) 5@6F8:x}V { \\xoOA. int n = -1; V& _ try{ )$XcO] oSavedFile.write(b,nStart,nLen); *7FtEk/l n = nLen; a/^ojn } G*JasHFs catch(IOException e) ^,*!Qk<c { BRyrdt*_e e.printStackTrace (); \$$DM"+:;H } ) 7w%\i{M !o1+#DL)MU rUmaKh?v|X return n; !E#FzY!}Pl } nW1u;. \2#7B8 RR
|Z, } C/_Z9LL?F ?)X0l wF[%+n (* /* Qv~lH&jG **SiteInfoBean.java e#BxlC */ EIug)S~ package NetFox; sYE| Cj'XL} zsOOx%
+ public class SiteInfoBean { b*Sw")# n%X5TJE .Yg7V'R1 private String sSiteURL; //Site's URL WCRGqSr4
private String sFilePath; //Saved File's Path +`=rzL"0I7 private String sFileName; //Saved File's Name ~+
[T{{ private int nSplitter; //Count of Splited Downloading File 1L3+KD~ >sGIpER7 @|N{EI public SiteInfoBean() |q!O~<H@ {//nSplitter的缺省值为5 QN)EPS:y //default value of nSplitter is 5 Q!.JV.( this("","","",5); ^Q,-4\ec } V96:+r [`(W(0U% 3'2>3Y/7Bb public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) `cgyiJ { sYa;vg4[ sSiteURL= sURL; <Ukeq0 sFilePath = sPath; Smg z} sFileName = sName; s`#g<_ {X this.nSplitter = nSpiltter; jEu-CU#: o&-D[|E| <!;NJLe` } r?7tI0 {?X:?M_ y8%QS* public String getSSiteURL() tK7v&[cI { vLI'Z)\ return sSiteURL; tw
k } b=+3/-d T$!Pkdh
9q[d?1 public void setSSiteURL(String value) V10JExsJ { ;r?s7b/> sSiteURL = value; wNvq['P } Jo'~oZ$ (! a;}V<7 03Uj0.Z|7 public String getSFilePath() !(A< { '/2)I8 return sFilePath; ,eSII2,r4 } ,,8'29yEq bt'lT tZ>'tE public void setSFilePath(String value) 2=IZD `{! { s.$:.*k sFilePath = value; 1$_|h@ } =C#22xqQ. 5Sz&j WU\Bs2 public String getSFileName() =I8^E\O(" { _J&IL!S2 return sFileName; &0x;60b } VV-%AS6; HC!5AJ&+}v 7<0oK|~c# public void setSFileName(String value)
y?'Z' { blx"WVqo sFileName = value; F]GX;<` } Ve\.7s sq_
yu( eNDc220b public int getNSplitter() "N3!!3 { X? 7s
return nSplitter; Yij_'0vZ } n,#o6ali> ]u|5ZCv0 {VE1c'E"V? public void setNSplitter(int nCount) +<Y1`kV) { T
s9go nSplitter = nCount; ZFC&&[%-sG } @rE+H
5 } @yNCWa~N Z{^Pnit 1VA%xOURh /* m`&6[[)6~ **Utility.java RveEA/&& */ mXT{c=N)w package NetFox; L"L a| <YAs0 a\m0X@Q public class Utility { ,a3M*}Y~3 ]D_
AZI
=AP0{ public Utility() R-6km Tex> { QE6L_\l J9);( awgS5We| } _iH:>2p 5R lm8<0*;, //线程睡眠 ({<qs}H" public static void sleep(int nSecond) , }B{) { YeI|&FMX try{ .2
}5Dc,eR Thread.sleep(nSecond); ?
@- t.N } ]Wn=Oc{F catch(Exception e) GrA}T` ] { #]2,1dJ e.printStackTrace (); RY}:&vWDk } obK6GG?ZE } 4oPr|OKj{* P\3H<?@4 //日志 Nazr4QU public static void log(String sMsg) ]t-B-(D { 72\o6{BiC System.err.println(sMsg); 42Cc`a%U } ~}Z'/zCZf r12e26_Ab 2{01i)2 y public static void log(int sMsg) ;HmQRiCg { ^.>XDUO F System.err.println(sMsg); S[y?> } T#3`&[ } `;Xwv) K 5AArI Ym
wb2]M /* "b0!h6$!H **TestMethod.java g7r0U6Y */ b`^mpB*6R package NetFox; ?Lem|zo 2+C8w%F8 9=G
dj!L public class TestMethod { hQLh}}B S %(R9N| <xAlp;8m5 public TestMethod() wb6$R};? { ///xx/weblogic60b2_win.exe e:(~=9}Li try{ U/:x<Y$ tj SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); eQsoZQA1 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); }J] P`v SiteFileFetch fileFetch = new SiteFileFetch(bean); XaYgl&x'!x fileFetch.start(); i; 3qMBVY~ } fVxRK\a\\ catch(Exception e){e.printStackTrace ();} qD>D =ve, ! Nu6]R677Y } UY&DXIP M (=w ff5U V2*m/JyeB public static void main(String[] args) 5YgUk[J { 0u8(*? new TestMethod(); 5U.,iQ(d } )q'~<QxI\ } uH8`ipX 点击下载更多相关资料
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