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/* i7xBi:Si **SiteFileFetch.java _(:bGI'.m */ DbK-3F_ package NetFox; t8"yAYj
import java.io.*; 4NmLbM&C8 import java.net.*; _U%2J4T2 f_tC:T4a &+8cI^kp public class SiteFileFetch extends Thread { p}-B>v +rOd0? MH_3nN SiteInfoBean siteInfoBean = null; //文件信息Bean x5W.
3* long[] nStartPos; //开始位置 }&IOBYHVDo long[] nEndPos; //结束位置 6zW3!_tz FileSplitterFetch[] fileSplitterFetch; //子线程对象 AJ85[~(lX long nFileLength; //文件长度 s;YuB#Z boolean bFirst = true; //是否第一次取文件 R8fB
8 ) boolean bStop = false; //停止标志 q! }O+(kt File tmpFile; //文件下载的临时信息 Xh"8uJD DataOutputStream output; //输出到文件的输出流 EB[B0e7} *`bAu * //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) g2GHsVS public SiteFileFetch(SiteInfoBean bean) throws IOException X##hSGQM { #
,27,# siteInfoBean = bean; 3X}>_tj //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); mdukl!_x tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); dO\irv) if(tmpFile.exists ()) hIMD2 { i@STo7= bFirst = false; y4N=v{EbL read_nPos(); CqbPUcK } ?DKwKt else aak[U;rx { y4~;H{! nStartPos = new long[bean.getNSplitter()]; d@_| nEndPos = new long[bean.getNSplitter()]; zsha/:b } GJ4R f% {/SLDyf%Z 1A-ess\ h;2n2.Q } tu0agSpU mA>u6Rlc 2/V9Or52 public void run() khtYn.eaL { 8.4+4Vxh //获得文件长度 O%?d0K //分割文件 nRlvW{p; //实例FileSplitterFetch Fb9!x/$tGV //启动FileSplitterFetch线程 LHJjPf)F //等待子线程返回 _qQB.Dzo: try{ "] 0sR if(bFirst) 0NMekVi { Erd)P nFileLength = getFileSize(); U 4ELlxGe if(nFileLength == -1) i?1g{JW { O+Q t8, System.err.println("File Length is not known!"); V[T`I a\ } yYM_ else if(nFileLength == -2) R#UcwX}o { (R)( %I1Oz System.err.println("File is not access!"); (:2,Rr1" } jLu`DKB else 3>t^Xu~ { Ot#O];3 for(int i=0;i<nStartPos.length;i++) (( D*kd" { R"`7aa6 nStartPos = (long)(i*(nFileLength/nStartPos.length)); A$]&j5nh| } l3C%`[MB for(int i=0;i<nEndPos.length-1;i++) k{q4Zz[ { io{uN/!X_J nEndPos = nStartPos[i+1]; Eax^1 |6 } 8V$ :th(' nEndPos[nEndPos.length-1] = nFileLength; $<(FZb= } u79,+H@ep } !$i*u-%4 O8drR4Pt }+fMYgw //启动子线程 DL0i fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; b=Y:`&o=[ for(int i=0;i<nStartPos.length;i++) ,>rr|O { |_^A$Hv fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), wtY*{m2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 9j;L- nStartPos,nEndPos,i); W+C@(}pt Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); L-T3{I,3 fileSplitterFetch.start(); ~K-c-Zs#z } 5 uU.K3G7 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), N BUSr}8| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Z`=[hu // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", @1w9!\7Vt nEndPos = " + nFileLength); {{WA=\N8C // fileSplitterFetch[nPos.length-1].start(); ^}gQh# Wp[R$/uT lStYfO:<'v //等待子线程结束 _ xAL0 ( //int count = 0; Xo{|m[, //是否结束while循环 T7!"gJ boolean breakWhile = false; El}."}l& RvQl{aL JIl<4 %A while(!bStop) tCJ+OU5/ { d3$&I==;: write_nPos(); 9bL`0L Utility.sleep(500); 5jTBPct breakWhile = true; $:#{Y;d *[-% .=[7 BixKK$Lo for(int i=0;i<nStartPos.length;i++) UUf-G0/P { {PXN$p:' if(!fileSplitterFetch.bDownOver) hf/6VlZ { lm?1 K:+[ breakWhile = false; =lzRx%tm break; :+9KNyA } B} %B4&Ij }
$rAHtr if(breakWhile) )jh4HMvmC break; dc.o K4G} W3XVr& |6%B2I&c //count++; cH&-/|N //if(count>4) dU7+rc2,CU // siteStop(); t(O{IUYM } fgs){Ng` MT8BP)C s<i& q {r System.err.println("文件下载结束!"); kjo,?$r
% } $c!cO" U catch(Exception e){e.printStackTrace ();} jm_b3!J } `uO(#au,U 7r`A6 \
! T ~9)0A"] //获得文件长度 v&hQ;v public long getFileSize() %Ts6M,Fpp { U#I8Rd I, int nFileLength = -1; a@ E+/9 try{ Svs!C+:le URL url = new URL(siteInfoBean.getSSiteURL()); 3fS+,>s\O HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); p[Pa(a,B7 httpConnection.setRequestProperty("User-Agent","NetFox"); ^
|k7g J YA y"Fp4$qb int responseCode=httpConnection.getResponseCode(); xz-z"
8d if(responseCode>=400) WOW:$.VO^ { <5R`E( processErrorCode(responseCode); i8F^ N= return -2; //-2 represent access is error U*G8}W } P8hA<{UFS\ z=}@aX[ +d7sy0 String sHeader; ~uF%* 8JOfx (;f7/2~` for(int i=1;;i++) ?-40bb { YVzcV`4w( //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); %?GLMf7) //Utility.log(in.readLine()); *Nv!Kuk sHeader=httpConnection.getHeaderFieldKey(i); gnW]5#c@ if(sHeader!=null) Fap@cW3?8 { [(Z sQK if(sHeader.equals("Content-Length")) ~FnB!Mh}? { ]g#ur@Y% nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); bPaE;?m break; *h+@a } 8db J' } :6~DOvY else (7C&I-l break; Gi7jgv{{ } I!
s&m%s } ~]+-<O^U~ catch(IOException e){e.printStackTrace ();} K+3dwQo catch(Exception e){e.printStackTrace ();} I)
mP? $D`~X` ~VNN Utility.log(nFileLength); L0v& m ?\_N*NEtK r?{$k3Vl return nFileLength; tTWeOAF } 2_^{Vez@I s[{L.9Y 1!u}~E_ //保存下载信息(文件指针位置) $
O1w6\}_ private void write_nPos() e-$U .cx { h'{}eYb+ try{ :K%{?y output = new DataOutputStream(new FileOutputStream(tmpFile)); Sq9I]A output.writeInt(nStartPos.length); nWTo$*>W for(int i=0;i<nStartPos.length;i++) F-!,U)
{ x/nlIoT // output.writeLong(nPos); vmI2o'zi output.writeLong(fileSplitterFetch.nStartPos); zdDn.
vG output.writeLong(fileSplitterFetch.nEndPos); adHZX } ]= 2wQ8 output.close(); j@4
yRl ^ } r 5!ie!5gE catch(IOException e){e.printStackTrace ();} Qo*,2B9R L catch(Exception e){e.printStackTrace ();} J(BtGGU' } :D-xa!7 9zdp8?T F_8nxQ- //读取保存的下载信息(文件指针位置) n@pm5f private void read_nPos() I]qml2 { GA19=gow try{
z^s40707x DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); #UR4I2t* int nCount = input.readInt(); C-@ nStartPos = new long[nCount]; ->DfT*) nEndPos = new long[nCount]; =>
.EDL. for(int i=0;i<nStartPos.length;i++) 1}#(4tw) { "%O,*t nStartPos = input.readLong(); FhJ8}at+e nEndPos = input.readLong(); .@0 i,7S } "j+zd&*={ input.close(); >|<8QomD } qXPT1%+)y catch(IOException e){e.printStackTrace ();} O.7Q*^_ catch(Exception e){e.printStackTrace ();} b6Jv|1w' } NTRw:' jr@u b .9]b private void processErrorCode(int nErrorCode) 7g(,$5 { ebk{p< System.err.println("Error Code : " + nErrorCode); /1X0h } vkE[Ur> QJFx/zU H \$04vkR //停止文件下载 'jp nQcwxx public void siteStop() F{*S}&q*)o { MF>1u% bStop = true; {p-b,J9~a for(int i=0;i<nStartPos.length;i++) $M\[^g(q fileSplitterFetch.splitterStop(); owA3>E5t& h,Y MR3:X g`KVF"8 } 7p""5hw } K~nk:}3Ui //负责部分文件的抓取 J-g#zs **FileSplitterFetch.java ]a|3"DP5 */ /kL X
f_ package NetFox; #84pRU~ H27J kZ& jREj]V> import java.io.*; /kGRN@ import java.net.*; B 95}_q &_
er_V~ jRXpEiM public class FileSplitterFetch extends Thread { (;=:QjaoZ Ww*='lz (j-[m\wF String sURL; //File URL |RQ19m@ long nStartPos; //File Snippet Start Position E^S[8= long nEndPos; //File Snippet End Position d)|{iUcW int nThreadID; //Thread's ID ~:ddTv?F boolean bDownOver = false; //Downing is over ADRjCk}I boolean bStop = false; //Stop identical gkUG*Zw FileAccessI fileAccessI = null; //File Access interface <:yB4t3H+q 0;'kv| Y>-|`2Z
public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException +~J?/ { ,)A^ 3Q* this.sURL = sURL; =?UCtYN,P this.nStartPos = nStart; JDVMq=ui this.nEndPos = nEnd; E" iH$NN nThreadID = id; BDY@&vF fileAccessI = new FileAccessI(sName,nStartPos);//定位 0 3L"W^gc } -}k'a{sj= S1^u/$*6 DsY-JBDvoz public void run() @YmD 79 { ~*D)L'`2M while(nStartPos < nEndPos && !bStop) N1WP { Kg&{
?& "Iu[)O% RsU=fe, try{ M*| y&XBe URL url = new URL(sURL); qWe1`.o HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [@[!esC httpConnection.setRequestProperty("User-Agent","NetFox"); L1*P<Cb String sProperty = "bytes="+nStartPos+"-"; O!='U!X@P httpConnection.setRequestProperty("RANGE",sProperty); Q17"hO>kC Utility.log(sProperty); m`
cw: vOsd>3" HTI1eLZ2 InputStream input = httpConnection.getInputStream(); ~u1ox_v`%( //logResponseHead(httpConnection); I jN3 jU a8aEZ724 hu\HK81m byte[] b = new byte[1024]; eA&hiAP/ int nRead; _Jj/"? while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) c"t1E-Nsk { 8 f%@:}H nStartPos += fileAccessI.write(b,0,nRead); c\UVMyE //if(nThreadID == 1) )F&@ M;2p' // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); z
h0 m3|9O } 7P9n.
[ S5d:?^PGg ^4]#Ri=U Utility.log("Thread " + nThreadID + " is over!"); sj2v*tFb bDownOver = true; ([UuO}m- //nPos = fileAccessI.write (b,0,nRead); dv-yZRU: } $G5m/[KDI catch(Exception e){e.printStackTrace ();} !U}A1) } :gY$/1SYD } WKX5Dl %f\{ ] \v]} //打印回应的头信息 `3kE$h# public void logResponseHead(HttpURLConnection con) * 103 { %0INtq for(int i=1;;i++) v83uGEq( { hxx,E>k String header=con.getHeaderFieldKey(i); xPb;_~ if(header!=null) p+;Re2Uyg //responseHeaders.put(header,httpConnection.getHeaderField(header)); '*!R
gbj; Utility.log(header+" : "+con.getHeaderField(header)); Nv*x^y] else rfYu8- break; <qZXpQ# } EG&^;uU } 'LFHZ&- B+);y 9 f-T>} public void splitterStop() y4,2Xs9, { cGkl=-oQ' bStop = true; y4VCehdJ
} lZ0+:DaP2 ' F`*(\# qh0)~JL4 } OnH>g" vPmP<c)cb b-]E-$Uz /* uByF*}d1 **FileAccess.java @5
kKMz *//文件访问(定位,写) |C'w] QYm package NetFox; PZNo.0M70 import java.io.*; 'e3y| >1pD'UZIy7 h |=^@F_\` public class FileAccessI implements Serializable{ (m)%5*: Sx;zvc //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 v7Knu] RandomAccessFile oSavedFile; ?#}=!$p long nPos; 2@08 V| H4l:L(!D "1%<IqpU+ public FileAccessI() throws IOException TzPx4L6? { zIF &ZYP this("",0); *Q!b%DIa$ } :N8D1e-a n,PHfydqX Da-F(^E public FileAccessI(String sName,long nPos) throws IOException #Yw^n?~~ { n/$Bd FH oSavedFile = new RandomAccessFile(sName,"rw"); 7S]
h:q%% this.nPos = nPos; 82$By]Y9 oSavedFile.seek(nPos); X&wK< } 4c2P%X(
C wB9IP{Pf >=U$s@ public synchronized int write(byte[] b,int nStart,int nLen) rFx2S { `}zv17wp int n = -1; LWVO%@)w try{
n:wn(BC3 oSavedFile.write(b,nStart,nLen); 7[D0n7B@ n = nLen; `t6lnO } S
BFhC catch(IOException e) P* aD2("Z { LrPDpTd e.printStackTrace (); Ku&(+e } gKYn*
#jZ:Ex 4aV3x&6X return n; 8z/ ^Ql } @%#(Hse RLKO0 # a@8knJ| } hA@X;Mh^w _eO] awsA 5Q%#Z
L/' /* R
+\y". **SiteInfoBean.java Rp@u.C< */ =pk'a_P8- package NetFox; [;?^DAnK2 rW`F|F% w}YHCh public class SiteInfoBean { vaQ,l6z
.h %kc g#p+tE #t/Q4X
+ private String sSiteURL; //Site's URL "q(&<+D@ private String sFilePath; //Saved File's Path JfVayI= private String sFileName; //Saved File's Name [=9R5.)c private int nSplitter; //Count of Splited Downloading File >N,G@{FR r!M2H{ c^bA]l^a public SiteInfoBean() cYp}$ {//nSplitter的缺省值为5 @i`gR% //default value of nSplitter is 5 /tUl(Fp J` this("","","",5); <]9MgfAe
} %bimcRX#W w1}[lq@ %/^d]# public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) p;5WLAF { o}%fs
* sSiteURL= sURL; =CVw0'yZ sFilePath = sPath; l~=iUZW< sFileName = sName; n;=A'g|Q this.nSplitter = nSpiltter; :D,YR(]) kDz.{Ih h49Q2` } ~H$XSNPi |4c==7. H|!s. public String getSSiteURL() XMdc n, { \%C[l return sSiteURL; dL\8^L } g}D$`Nx: ~mp$P+M(%p Z\L@5.*ydE public void setSSiteURL(String value) |-mazvA { ##5/%#eZ sSiteURL = value; 9?:S:Sq } O7\s1
V; |]q=D1/A p3S c4 public String getSFilePath() \1!k)PZdTW { Qx6/QaS? return sFilePath; /Ow?nWSt } n1t(ns| Cm4*sN.&) `[KhG)Y7t public void setSFilePath(String value) #SYWAcTkO} { [1*/lt|+p sFilePath = value; Kzb@JBIF } m\f_u* W~tOH=9> 5\S7Va;W public String getSFileName() uI2'jEjO { W,~1KUTc return sFileName; 9qDGxW
'1 } `VsGa =M5M; q?L(V+X public void setSFileName(String value) ? st#6=M { J7GsNFL sFileName = value; ,*[LnR } f>dkT'4 IFxI>6<& "^z=r]<5
public int getNSplitter() [MS.5+1Y { u`@f~QP0 return nSplitter; Aa>gN } k_>{"Rc rbPs~C-[ ts<dUO
public void setNSplitter(int nCount) +
nS/jW { sK0VT"7K nSplitter = nCount; 6# ";W2 } fR4l4 GU?) } &|}IBu :T }G+A_HF ^ "5:f{GfO#v /* NCnId}BT **Utility.java ':D&c */ r)(BT:2m package NetFox; L59oh %J7mZB9 6 v^ public class Utility { -!,]Y10 >x
ghq 9}cuAVI public Utility() 7&V^BW { 6bKO;^0 n/oipiYx 5`'=Ko,N } N5s|a5 yI.H4Dl< //线程睡眠 8='21@wrN public static void sleep(int nSecond) H
r^15 { QYfAf3te try{ ?lDcaI>+n Thread.sleep(nSecond); }u_EXP8M } I"32[?0
(; catch(Exception e) k>&s(b { }&T<wm! e.printStackTrace (); e=o{Zo?H= } `JWYPsWk } M1]6lg[si 0*Km}?;0- //日志 {IPn\Bka public static void log(String sMsg) s i"` { e*2&s5 #RT System.err.println(sMsg); 0uIV6LI } )n}]]^Sc iCnUnR{ 8jjk?PUD8 public static void log(int sMsg) %rDmW?T { _A,-[*OKI System.err.println(sMsg); nK jeH@ } r($_>TS&" } co^P7+j Naf`hE9 MeI2i /* I,<>%Z|' **TestMethod.java 1R2o6`_ */ sh
!~T<yy package NetFox; n-y^7'v lv00sa2z n4vXm public class TestMethod { fmnRUN= zY+t ,2z 53`9^|: public TestMethod() JMirz~%ib { ///xx/weblogic60b2_win.exe 7"n)/;la try{ Q.9Ph
~ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); )iEa2uJ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); fXu~69_ SiteFileFetch fileFetch = new SiteFileFetch(bean); I|F~HUzA" fileFetch.start(); h\=p=M } 6VH90KAT catch(Exception e){e.printStackTrace ();} iM?I
/\ GP{$v:RG hy$MV3LP } ol?z<53X] ,5eH2W /$FXg;h9$ public static void main(String[] args) 28T\@zi { >9o,S3 new TestMethod(); FXOT+9bg } bmj8WZ } aCU7w5 点击下载更多相关资料
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