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/* E cz"O
**SiteFileFetch.java G{Q'N04RA */ \Y 4Z Q"0Q package NetFox; e)(| import java.io.*; ~jTnjx import java.net.*; &4FdA|9T K0@7/*% Jjq%cA public class SiteFileFetch extends Thread { aH"c0A !AHm+C_=Lg YTit=4| SiteInfoBean siteInfoBean = null; //文件信息Bean /Q_\h+` long[] nStartPos; //开始位置 FI5C&d5d long[] nEndPos; //结束位置 ![tI(TPq FileSplitterFetch[] fileSplitterFetch; //子线程对象 OwaXG/z~ long nFileLength; //文件长度 _4]dPk#^ boolean bFirst = true; //是否第一次取文件 %Q~Lk]B?t boolean bStop = false; //停止标志 Xlw=R2`)~ File tmpFile; //文件下载的临时信息 qm8RRDG DataOutputStream output; //输出到文件的输出流 N|LVLsK YR.'JF`C //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) F#wa)XH public SiteFileFetch(SiteInfoBean bean) throws IOException LeCU"~ { k 'b|#c9c siteInfoBean = bean; ,oe{@z{*@ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); N-]n>E tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); U s5JnP 5 if(tmpFile.exists ()) N!,l4!M\N { t79MBgZ bFirst = false; <i|+p1t read_nPos(); )Cl&"bX } vGw}e&YI else quYZD6IH { H !u:P?j@\ nStartPos = new long[bean.getNSplitter()]; Wg1WY}zG nEndPos = new long[bean.getNSplitter()]; W=m_G]"L } y;jyfc$
` KK?~i[aL
(~oPr+d (" %yV_R } wSMgBRV#^ 0a'y\f:6* \^cn}db) public void run() 0*/~9n-Vl { FzIA>njt //获得文件长度 fZO/HzX //分割文件 yw0uF //实例FileSplitterFetch CmZ?uo+Y //启动FileSplitterFetch线程 @\R)k(F //等待子线程返回 5UbVg try{ "<WSEs if(bFirst) ^5+-7+-S { V1G]LM nFileLength = getFileSize(); wkGF&U if(nFileLength == -1) BR=Yte
/ { DxBt83e System.err.println("File Length is not known!"); 9=SZL~#CE } BhjXNf9[ else if(nFileLength == -2) <5q }j-Q { 1\p[mN System.err.println("File is not access!"); /d4xHt5a } <3bh-) else tv2dyC&a { cg~FW2Q for(int i=0;i<nStartPos.length;i++) ;P_Zen { rtpjx% nStartPos = (long)(i*(nFileLength/nStartPos.length)); 5?O"N } ?|33Np) for(int i=0;i<nEndPos.length-1;i++) !>tXib]: { 4aRYz\yT= nEndPos = nStartPos[i+1]; ObCwWj^qO } ivm.ng[ nEndPos[nEndPos.length-1] = nFileLength; +G~b-} } Cur)| } $lqV(s S:d `z' 5~kf:U%~ //启动子线程 g#AA.@/Z fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 25(\'484> for(int i=0;i<nStartPos.length;i++) (xTHin$ { ,]d}pJ}PX` fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /~yqZD<O siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 09"~<W8 nStartPos,nEndPos,i); ,wV2ZEW}e Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 2{&" 3dq fileSplitterFetch.start(); li{_biey} } 5Z:HCp-aG // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ^j`
vk siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); @sDd:>t // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", JG_7G=~ nEndPos = " + nFileLength); Cfj*[i4 // fileSplitterFetch[nPos.length-1].start(); (|x-> a 4k#6)e =4I361oMf //等待子线程结束 , ^nUi c //int count = 0; Wp'\NFe8 //是否结束while循环 BYY>;>V boolean breakWhile = false; ;2iZX=P`n O []+v HCu1vjU(] while(!bStop) +bSv-i - { 2PC4EjkC write_nPos(); ``SjALf Utility.sleep(500); w+}dm^X breakWhile = true; V7^?jck eAqQ~)8^ T/3UF for(int i=0;i<nStartPos.length;i++) :!/}*B { 'W#<8eJo if(!fileSplitterFetch.bDownOver) ]D%[GO//! { +LyhF2 breakWhile = false; +n:#Uf) break; 2P|-V} ;9 } X#o:-FKf } oqE
-q\!H if(breakWhile) BgRiJFa.d[ break; '%MIG88 yT>T
Vq/e Ky DBCCOv //count++; \-B>']:R4 //if(count>4) Ax\Fg
5 // siteStop(); 7#&sG
} 52~k:"c #Y:/^Q$_qS LU]~d<i99 System.err.println("文件下载结束!"); *iR`mZb } 6nDx;x&Q catch(Exception e){e.printStackTrace ();} ,lUo@+ } LgaJp_d>9* *qqFIp^ #:yZJS9f9 //获得文件长度 ,P:.' public long getFileSize() {tM D*?C[6 { X4TUi8ht!] int nFileLength = -1; _#+9)*A try{ L`!sV-. URL url = new URL(siteInfoBean.getSSiteURL()); -(2-zznZ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); OlK2<< httpConnection.setRequestProperty("User-Agent","NetFox"); $ D89|sy F,W(H@ ~x 9W8Dp?: int responseCode=httpConnection.getResponseCode(); aT0 y if(responseCode>=400) 4S=lO?\"A { 94R+S-|P processErrorCode(responseCode); [brrziZ return -2; //-2 represent access is error ~%
c->\Q } '=2t(@aC \<8!b{F cnsGP*w String sHeader; @Q^;qMy hi=U `Ctj]t for(int i=1;;i++) ]+Vcu zq/ { aZ^lI
6@+4 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Mc8^{br61 //Utility.log(in.readLine()); MnQ_]cC sHeader=httpConnection.getHeaderFieldKey(i); &qC>*X. if(sHeader!=null) s6egd%r { vuAjAeKm if(sHeader.equals("Content-Length")) . FruI#99 { bcYz?o6 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); $_VD@YlAp break; I,[EL{fz } +~@Y#>+./l } ..t=Y# else 2V]2jxOQ break; f[RnL#*xJU } 3LmHH
= } S]N4o'K}q catch(IOException e){e.printStackTrace ();} phdN9<Z catch(Exception e){e.printStackTrace ();} Ef!F;D e)A J]UHq$B G$j8I~E@ Utility.log(nFileLength); .DQ]q o]OG 2S;zze7) e=_hfOUC return nFileLength; B]vj1m`9 } 5"Yw$DB9 hD*?\bBs0 X]!@xlwF\ //保存下载信息(文件指针位置) 9V&LJhDQ private void write_nPos() 3XRG" { 4Y!v$r try{ *E]\l+]J output = new DataOutputStream(new FileOutputStream(tmpFile)); b$`O|S output.writeInt(nStartPos.length); `FwAlYJK for(int i=0;i<nStartPos.length;i++) mAzW'Q4D { { SfU! // output.writeLong(nPos); R32d(2%5K output.writeLong(fileSplitterFetch.nStartPos); H]e 2d| output.writeLong(fileSplitterFetch.nEndPos); |#wz)=mD } S6mmk&n output.close(); D\R^*k@V } AMdS+(J catch(IOException e){e.printStackTrace ();} 4Z] 35* catch(Exception e){e.printStackTrace ();} S\A[Z&k0
} J^:~#`8 *QG;KJ% A=K1T]o //读取保存的下载信息(文件指针位置) AqkK`iJ# private void read_nPos() `2PT 8UM { r.^&%D try{ .Dm{mV@*T DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); -+>am? int nCount = input.readInt(); 67x^{u7 nStartPos = new long[nCount]; keOW{:^i nEndPos = new long[nCount]; '_)tR;s for(int i=0;i<nStartPos.length;i++) @Hh"Y1B { JyO lVs<T nStartPos = input.readLong(); 7Cf(y'w^ nEndPos = input.readLong(); %Qq)=J<H; } ;>N ~,Q input.close(); =HHg:" } c29Z1Zs2) catch(IOException e){e.printStackTrace ();} /3]|B%W9 catch(Exception e){e.printStackTrace ();} Ysu/7o4 } 7krA+/Qr( IJ;*N sLIP|i private void processErrorCode(int nErrorCode) -e>)yM `i { 0
,-b %X System.err.println("Error Code : " + nErrorCode); Vi WgX. } k#xpY!'7 sA}R! gN~y6c:N //停止文件下载 EB<q. public void siteStop() S!_?# ^t { K5&C}Ey1 bStop = true; B:cOcd?p for(int i=0;i<nStartPos.length;i++) c ?XUb[ fileSplitterFetch.splitterStop(); h>0<@UP Ah{pidUx u7WM6X } QE2^.|d{ } Bw.&3efd //负责部分文件的抓取 WmUW
i{ **FileSplitterFetch.java PDng!IQ^ */ bq-\'h
f< package NetFox; Q%Q?q)x uFZB8+ X>7]g670@ import java.io.*; J|S^K kC import java.net.*; :n9~H+! r:4IKuTR p]Zabky public class FileSplitterFetch extends Thread { TZNgtR{q
F
t/
x5 9PK-r;2 String sURL; //File URL IQe[ CcM long nStartPos; //File Snippet Start Position i0Q
_f!j long nEndPos; //File Snippet End Position 92VX5?Cyg int nThreadID; //Thread's ID U^BXCu1km boolean bDownOver = false; //Downing is over NqE7[wH boolean bStop = false; //Stop identical wS*CcIwj FileAccessI fileAccessI = null; //File Access interface A5<Z&Y[ Ks2%F&\cE oh0|2IrM public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 5'Jh2r { +WN>9V0H this.sURL = sURL; (!5}" fj this.nStartPos = nStart; =v$s+`cP this.nEndPos = nEnd; Sx9:$"3.X nThreadID = id; r5fkt>HZ fileAccessI = new FileAccessI(sName,nStartPos);//定位 (Zg'pSs) } =GKYroNM jI`To%^Y
kjC{Zr public void run() PJ'lZu8?x { qbq<O %g= while(nStartPos < nEndPos && !bStop) uf'P9MA}> { kJi&9
OMI!=Upz <` j[;>O try{ [2 w<F[ URL url = new URL(sURL); vs)I pV( HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0$ 9;pzr httpConnection.setRequestProperty("User-Agent","NetFox"); m2q;^o:J String sProperty = "bytes="+nStartPos+"-"; ,9tbu!Pvq httpConnection.setRequestProperty("RANGE",sProperty); :CST!+)o Utility.log(sProperty); Xe3z6 ca3BJWY}J ^x"c0R^ InputStream input = httpConnection.getInputStream(); ]n]uN~)9 //logResponseHead(httpConnection); 8
]06!7S} G q:4rG| a$zm/ byte[] b = new byte[1024]; {&}/p-S int nRead; gLSG:7m@ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) QB3d7e)8> { >+jbMAYSq nStartPos += fileAccessI.write(b,0,nRead); a;'E}b{`F //if(nThreadID == 1) *- IlF] // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); x"llX } 2u*h*/ [mf7>M`p]@ RnA&-\|* Utility.log("Thread " + nThreadID + " is over!"); W^d4/] bDownOver = true; .W@4vrp@ //nPos = fileAccessI.write (b,0,nRead); $mI:Im`s } mB^I@oZ* catch(Exception e){e.printStackTrace ();} $dZ>bXUw: } 2^^'t 6@ } bg1"v a#2 (O_t5<A*X N?=qEX|R //打印回应的头信息 mzV"G>,o public void logResponseHead(HttpURLConnection con) 7Z`Mt9:Ht { V3 _b! for(int i=1;;i++) <5ft6a2fQ { )`s;~_ZZ String header=con.getHeaderFieldKey(i); Cwsoz if(header!=null) fY%M=,t3c //responseHeaders.put(header,httpConnection.getHeaderField(header)); 3Zaq#uA Utility.log(header+" : "+con.getHeaderField(header)); .YjrV+om1 else o,CA;_ break; bQXc IIa{ } ;h,R?mU } OC?Zw@ zr3q>]oma YHO;IQ5 public void splitterStop() $#G6m`V { /zl3&~4 bStop = true; 49xp2{ } ~tg1N^]kV =GH@.3`X %$ir a\
sM } @zr8%8n ;# R3k V~J*49t&2J /* u>,lf\Fgz **FileAccess.java UzU-eyA *//文件访问(定位,写) dysX package NetFox; H5AK n*'7 import java.io.*; &Rt+LN0qB0 MfXt+c`r Kf05<J! public class FileAccessI implements Serializable{ aQ!9#d_D UM4@H1 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 y3={NB+ RandomAccessFile oSavedFile; gro7*< long nPos; YW8K
$W < -Hs<T|tW hi ;WFyJTu public FileAccessI() throws IOException A$9q!Ui#d { |`_ <@b this("",0); wUru1_zjO } BGB,Gb $xRo<,OV+ lq>*x=< public FileAccessI(String sName,long nPos) throws IOException 0M#N=%31 {
tSEA999 oSavedFile = new RandomAccessFile(sName,"rw"); 7XUhJN3n this.nPos = nPos; #joF{M{ oSavedFile.seek(nPos); y!7B, } l9_m>X~ 9USrgY6_ I$aXnd6) public synchronized int write(byte[] b,int nStart,int nLen) W ;fH&r)d@ { z6p#fsD int n = -1; ]~?S~l% try{ ltNuLZ oSavedFile.write(b,nStart,nLen); -/M9 vS n = nLen; !(W[!% } zo_k\K`{@ catch(IOException e) q$MHCq; { fzLANya e.printStackTrace (); o{9?:*?7 } rumAo'T/% tegOT]| xh{mca>?G return n; 5+y@ ]5&g } {udrT"h ov1Wr#s CIIY|DI`l } 6e,Apj 0 )qbI{^_g P`}$-#D F /* _i-\mR_~ **SiteInfoBean.java l &}piC */ \^yXc*C package NetFox; )i&%cyZw +:}kZDl@ X s jSi;S4 public class SiteInfoBean { *f{7 w"q-#,37j >g=^,G}y private String sSiteURL; //Site's URL n.@#rBKZ private String sFilePath; //Saved File's Path JK[T]|G private String sFileName; //Saved File's Name 3*G5F}7%= private int nSplitter; //Count of Splited Downloading File N"S3N)wgd !zU/Hq{wcK bdCykG- public SiteInfoBean() 9p5= _ {//nSplitter的缺省值为5 c2/"KT //default value of nSplitter is 5 :*=Ns[Y this("","","",5); wqcDAO( } Ih; aBS $Ru&>D#stK kPW BDpzN public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) N5yJ'i~,M { |ribWCv0 sSiteURL= sURL; 'gYg~= sFilePath = sPath; L"4]Tm>zq sFileName = sName;
%W(^6p! this.nSplitter = nSpiltter; -=5EbNPwG 2H6:np|O {yTpRQN~ } 00"CC :Pc(DfkS kY=rz&?U public String getSSiteURL() sp^Wo7&g { I,]J=xi return sSiteURL; <Kg2$lu(_` } u
>4ArtF D '<$ g e#1.T public void setSSiteURL(String value) ^}hJL7O' { t-x[:i sSiteURL = value; 6s5yyy=L%~ } p=H3Q?HJ} =x1Wii$` )J&|\m(e public String getSFilePath() N\'TR6_,b { rmsQt
return sFilePath; 1&|
} g>_OuQ|c f9a$$nb3` 0Q`&inwh public void setSFilePath(String value) 07FT)QTE { V3Yd&HVWNQ sFilePath = value; !j0_
cA } ?,>5[Ha^? Dm^l?Z GB=bG%Tb public String getSFileName() 68p R: { hXc}r6<B return sFileName; @y5= J`@= } (xu=% NJm-%K V9Hl1\j^ public void setSFileName(String value) F\-Si!~oOz { rI>LjHP sFileName = value; ke\[wa_!6b } t!:)L+$3 O:IQ!mzV5 #|?8~c;RWG public int getNSplitter() Fm5Q&'`l { o,*=$/or return nSplitter; </=3g>9Z } 8SZK:VE@ A?r^V2+j eF5;[v public void setNSplitter(int nCount) SO_>c+Dw { q/x/N5HU nSplitter = nCount; ot }6D } I0_Ecp } #x)8f3I u{Ak:0G7 7 >bMzdH /* lE'wfUb **Utility.java Oyan9~ */ |vz9Hs$@l package NetFox; QD4:W"i `[Sl1saZ$S ?oKL&I@ public class Utility { ^V.'^=l Y{+3}drJE G "brT 5: public Utility() RG1\=J$:E { \=fh-c(J, x*q35K^PE qrE0H } b 4OnZ;FI bLlH//ZRH //线程睡眠 (O0byu} public static void sleep(int nSecond) t^U^Tr { gr+Pl>C{ try{ BIj Thread.sleep(nSecond); r6
}_H?j } 30d#Lq catch(Exception e) H+x#gK2l { vQHpf>o e.printStackTrace (); D/:3RZF } VB"(9O] } ="(>>C1- x0<^<D &Q //日志 .iT4- public static void log(String sMsg) Hi8Y6|y$D { fRNP#pi0u System.err.println(sMsg); DFy1 bg } -Qb0:]sV# -_>.f(1 l"\uf(0K public static void log(int sMsg) H~Uq?!=b { h<NRE0- System.err.println(sMsg); [z+x"9l0! } C3.=GRg~l } 4B$bj`h P)1EA; 3;Hd2 ;G /* 3Gd|YRtk **TestMethod.java SqqDV)Uih1 */ zlkWU package NetFox; +c?ie4 5^2TfG9 yVYkuO public class TestMethod { iZC`z
} FL&dv SQ <f public TestMethod() a}yR p { ///xx/weblogic60b2_win.exe }]GbUC!Zb try{ q+%!<]7X SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Yxqj - //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); veO?k.u( SiteFileFetch fileFetch = new SiteFileFetch(bean); OG}KqG!n fileFetch.start(); ]]y[t|6 } (9'be\ catch(Exception e){e.printStackTrace ();} 6t$N78U w4A#>;Qu* NWnWk } H:MUNc8i {aIZFe}B 8Fx]koP. public static void main(String[] args) k=|K| { 0_HJ.g! new TestMethod(); t=
*Jg/$ } iAHZ0Du } u\3ZIb 点击下载更多相关资料
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