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/* iz"3\{aN
**SiteFileFetch.java 1MA@JA:T */ G.U5)4_^ package NetFox; AN9[G import java.io.*; 5c-N0@\ import java.net.*; (S^ck%]]a! EqM;LgE= F: 37MUQi public class SiteFileFetch extends Thread { 2)/NFZ g\M5:Qm `^UK SiteInfoBean siteInfoBean = null; //文件信息Bean XT@Mzo49z\ long[] nStartPos; //开始位置 '7Ig.K& long[] nEndPos; //结束位置 DHfB@/q# FileSplitterFetch[] fileSplitterFetch; //子线程对象 v+1i=s2$ long nFileLength; //文件长度 PQj<[rY boolean bFirst = true; //是否第一次取文件 %kU'hzLg boolean bStop = false; //停止标志 J^3H7 ]
File tmpFile; //文件下载的临时信息 vH?9\3 DataOutputStream output; //输出到文件的输出流 CP`
XUpX`& (xyS7q]m //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 8TZENRzx-| public SiteFileFetch(SiteInfoBean bean) throws IOException =7ydk"xM* { 0-2"FdeQU siteInfoBean = bean; hRTMFgO //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); yFpySvj} tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); q^bO*bv if(tmpFile.exists ()) );}t&} { SQ#7PKH bFirst = false; +2T!z= read_nPos(); WtX>Qu| } oO=o|w|T else 7!2
HNg { BgRZ<B` nStartPos = new long[bean.getNSplitter()]; 3x5!a5$Y nEndPos = new long[bean.getNSplitter()]; %AR^+*Nu } %%g-GyP
1 {K7YTLWY 0rzVy/Z( _ 6:ww/ } %cW;}Y[?P J4yt N3 3q &k public void run() %<}=xJf>1 { ; Zq/eiB //获得文件长度 }e=e",eAT //分割文件 5()Fvae{k //实例FileSplitterFetch yr4ou //启动FileSplitterFetch线程 MEU[%hty_ //等待子线程返回 J_ V,XO try{ zLek&s&- if(bFirst) FDLd&4Ex { V-vlTgemwc nFileLength = getFileSize(); <TjBd1 if(nFileLength == -1) zk>h u<_ { |< N frz System.err.println("File Length is not known!"); NfF~dK| } koH4~m{ else if(nFileLength == -2) %D^bahf { &`@M8-m#F System.err.println("File is not access!"); /4C`k=> } eF1.VLI else yDtOpM8<{ { $pFk"]= for(int i=0;i<nStartPos.length;i++) f9']
jJ+ { 6q%ed
UED nStartPos = (long)(i*(nFileLength/nStartPos.length)); oBw}hH,hp } n>llSK for(int i=0;i<nEndPos.length-1;i++) +"L$ed(=nJ { "=A|K~b nEndPos = nStartPos[i+1]; B| Q6! } rl|Q)A{ nEndPos[nEndPos.length-1] = nFileLength; ~t9Mh^gij } ? ICDIn } /J;]u3e| k!13=Gh fq Y1ggL //启动子线程 3'@&c?Fye fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; $Q4=37H+ for(int i=0;i<nStartPos.length;i++) nW&$~d { #`j][F@N fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]<X2AO1 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), vPsq<l} nStartPos,nEndPos,i); X,Zd= Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); #{w5)|S#JD fileSplitterFetch.start(); g8Aj `O } D -iUN // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), lJj&kVHb siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); MOLO3?H( // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", j i##$xC nEndPos = " + nFileLength); A`C-sD> // fileSplitterFetch[nPos.length-1].start(); r|bPR!0 )KE_t^$ M c@GH //等待子线程结束 )l{A{f6O //int count = 0; YOKR//|3 //是否结束while循环 N
^f}ui i boolean breakWhile = false; >
Z++^YVE .Qk{5=l6P `]hCUaV while(!bStop) ZvyjMLf { ;o%:7& write_nPos(); IQoH@l&Xk Utility.sleep(500); sU*3\ breakWhile = true; UKYupLu5 Zsk?QS FE s*+ZYPk for(int i=0;i<nStartPos.length;i++) Z~RdFC { Mz}i[|U\ if(!fileSplitterFetch.bDownOver) +_-Y`O!Q { b_mWu@$ breakWhile = false; 2*YP"Ryh break; zP|*(* } y&3TQ]f\ } %/md"S if(breakWhile) kdd7Xbw- break; kDg{>mf wXcMt>3 :o<N!*pT //count++; H8<m9zDvl //if(count>4) !?n50 // siteStop(); 7 BK46x } 776 nWw) !*8#jy J5-rp| System.err.println("文件下载结束!"); 3z$HKG } /evaTQPz catch(Exception e){e.printStackTrace ();} FSVS4mtiX\ } ^
`E@/<w8 aulaX/'-_ [[&)cbv //获得文件长度 _&K\D
p&@ public long getFileSize() Lv^a+' { tNYJQ int nFileLength = -1; &R0OeRToUb try{ +&?'KZ+Z_v URL url = new URL(siteInfoBean.getSSiteURL()); 1=ip,D HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); tgK x 4 httpConnection.setRequestProperty("User-Agent","NetFox"); EuLXtq .u&|e E2-ojL[6 int responseCode=httpConnection.getResponseCode(); &1oaZY w if(responseCode>=400) ujow?$& { v<%]XHN processErrorCode(responseCode); z?I+u*rF6 return -2; //-2 represent access is error Plb}dID" } TJE%
U0Ln ::0aY;D2 5a8JVDLX^ String sHeader; 'G52<sF zU=YNrn !+5C{Hs2 for(int i=1;;i++) B,w:DX { }FHw"
{my //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); uSH>$;a //Utility.log(in.readLine()); CG CQa0 sHeader=httpConnection.getHeaderFieldKey(i); i1tVdbC] if(sHeader!=null) S!u6dz^[$X { `:V}1ioX5 if(sHeader.equals("Content-Length")) Ri9Kr { 7&=-a|k~ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); p| Vmdnb break; Lf[G>0t&n } !-F ^VGD(8 } 7 kEx48 else Oi6f8*, break; P=&'wblm? } 2%`^(\y } D!c1;IHZ catch(IOException e){e.printStackTrace ();} wwo(n$!\ catch(Exception e){e.printStackTrace ();} j!6elzg n9N#&Q"7m
$+A%ODv Utility.log(nFileLength); 'y'T'2N3 =U=e?AOG2 [0h* & return nFileLength; xi;/^)r } U? {'n#n 5
F\o;t: '.=Wk^,Ua //保存下载信息(文件指针位置) I93 ~8wQ private void write_nPos() q-A`/9 { @47[vhE try{ )>-77\ output = new DataOutputStream(new FileOutputStream(tmpFile)); J'I1,5( output.writeInt(nStartPos.length); }Q47_]5 for(int i=0;i<nStartPos.length;i++) e$ThSh\+( { av'd%LZP // output.writeLong(nPos); [`y:M&@ output.writeLong(fileSplitterFetch.nStartPos); C}n[?R output.writeLong(fileSplitterFetch.nEndPos); MMd0O X)P } TS\9<L9S output.close(); Uc_'3|e } LDT'FwMjy catch(IOException e){e.printStackTrace ();} $, 8 CH)w catch(Exception e){e.printStackTrace ();} GS$ZvO } c1pq]mz|z 4 *Bp MZ;"J82p //读取保存的下载信息(文件指针位置) ,Wz[tYL* private void read_nPos() 6U;Jg_zS { 9@$tiDV try{ #H'sZv DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); "Czz,;0 int nCount = input.readInt(); fR+Ov8PCq nStartPos = new long[nCount]; X_vI0YX9 nEndPos = new long[nCount]; 3*CzXK>`M& for(int i=0;i<nStartPos.length;i++) +A]&AkTw { Z}sG3p nStartPos = input.readLong(); d9`3EP)n nEndPos = input.readLong(); 1mT|o_K{ T } ~C}(\8g input.close(); ?2JS&i } 3g?MEM~ catch(IOException e){e.printStackTrace ();} 9\AEyaJFZ catch(Exception e){e.printStackTrace ();}
1m&!l6Jk } f o/
D3 C1ZFA![ 7xLo4 private void processErrorCode(int nErrorCode) zF[3%qZE:T { 4]Un=?)I System.err.println("Error Code : " + nErrorCode); Paae-EmC } U@o2gjGN OVDMC4K2z! _7-"VoX //停止文件下载 QVnO
public void siteStop() |#DC.Ga! { 7bgnZ]r8t bStop = true; .Ws iOJU for(int i=0;i<nStartPos.length;i++) &Iv\jhq
fileSplitterFetch.splitterStop(); n;-x!Gs btUUZ"q< ""25ay } x:f|3"\s } OvyB<r //负责部分文件的抓取 GCf._8;% **FileSplitterFetch.java 4
+da */ t-v^-# package NetFox; 9s;!iDFn OhSt6&+ |% M{kA- import java.io.*; sYAG,r>h import java.net.*; '0'"k2"vC hW0,5>[7% Ff)~clIK ' public class FileSplitterFetch extends Thread { adRNrt*! r6O7&Me< '<RB String sURL; //File URL V\iIvBpWg long nStartPos; //File Snippet Start Position ,xAM[h& long nEndPos; //File Snippet End Position Y(#d8o}}# int nThreadID; //Thread's ID ]>VJ--fH boolean bDownOver = false; //Downing is over RT.wTJS; boolean bStop = false; //Stop identical |x _-I#H FileAccessI fileAccessI = null; //File Access interface _|^&eT-u d&[M8( *pcbwd!/ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ZaukMEq { oW
yN:Qh this.sURL = sURL; b6LC$"t0 this.nStartPos = nStart; C:tSCNH[ this.nEndPos = nEnd; [I+)Ak5 nThreadID = id; +WV_`Rx# fileAccessI = new FileAccessI(sName,nStartPos);//定位 e 5WdK } >6.[i@RmWU Xa? 6# )+jK0E1 public void run() g9FVb7In_ { Ov~S2?E8 while(nStartPos < nEndPos && !bStop) 5CH-:|(;= { `>`K7-H zJy 89ib' h+zkVRyA try{ .J<qfQ URL url = new URL(sURL); w]o:c(x@ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^| FVc48{ httpConnection.setRequestProperty("User-Agent","NetFox"); s60:0 > String sProperty = "bytes="+nStartPos+"-"; NE=#5?6%g7 httpConnection.setRequestProperty("RANGE",sProperty); _Cv[`e. Utility.log(sProperty); *uI hxMX K-"HcHuF 3zA8pI w InputStream input = httpConnection.getInputStream(); V<~_OF //logResponseHead(httpConnection); B>p0FQ. ^H\-3/si* aowPji$H byte[] b = new byte[1024]; W[1f]w3 int nRead; Pt PGi^ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Dj,+t+| { &G7)s%q nStartPos += fileAccessI.write(b,0,nRead); w{:Oa7_A //if(nThreadID == 1) XoH[MJC // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *Lb(urf } 0?5% Fl#VKU3h ERX|cc Utility.log("Thread " + nThreadID + " is over!"); !5E%W[ bDownOver = true; XW&8T"q7 //nPos = fileAccessI.write (b,0,nRead); Q[ 9rA } ,/w852|ub catch(Exception e){e.printStackTrace ();} [FAOp@7W } lE2wkY9^/ } Oc"'ay(g :~0^ib<v; o$H Jg //打印回应的头信息 |`94W j< public void logResponseHead(HttpURLConnection con) .Kh(F6
s { ok\/5oz for(int i=1;;i++) oQ-|\?{;A { hD6ur=G8u String header=con.getHeaderFieldKey(i); Jc"$p\ $- if(header!=null) 11@2 ;vw //responseHeaders.put(header,httpConnection.getHeaderField(header)); LjH&f 4mY Utility.log(header+" : "+con.getHeaderField(header)); q~g&hR}K else [!dnm1 break; +SuUI-. } ku[=QsMv } X>@.-{6T \\R*V'e! 0oi5]f6g?8 public void splitterStop() }ygbgyLa { zfr (dQ bStop = true; P^_d$ } Ng_rb KXC# \}4#**] =:n[{/O= } qK6
uU9z ev;5?9\E [Tb3z:UUvf /* u>Axq3F **FileAccess.java dl7p1Cr *//文件访问(定位,写) *F8uu. package NetFox; &h4Z|h[01 import java.io.*; l=-dK_I? \")YKN=W e/HX,sf_g public class FileAccessI implements Serializable{ ZAo)_za&mH 0JZq:hUd //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 W-]yKSob RandomAccessFile oSavedFile; ]N(zom_0d long nPos; Dpp52UnTE Ng;b!S ;cm{4%=Iqe public FileAccessI() throws IOException p3A-WK|NX { [vjkU7;7A this("",0); >gi{x|/ } _9O }d i2ml[;*,N _qzo):G.s public FileAccessI(String sName,long nPos) throws IOException 4Tzu"y { 9
K / oSavedFile = new RandomAccessFile(sName,"rw"); %wjU^Urya this.nPos = nPos; TNPGw! oSavedFile.seek(nPos); FO'.
a } #u=O 5%. ]kplb0` ubC JZ"! public synchronized int write(byte[] b,int nStart,int nLen) aXK%m
{ E Pd.atA int n = -1; E?q'|f try{ 1'U%7#;E oSavedFile.write(b,nStart,nLen); -ZoOX"N} n = nLen; (B/F6
X;o. } IO)Ft catch(IOException e) k2tX$ \E { (zLIv9$ e.printStackTrace (); q!oZ; $ } z#E,96R NW>:Lz
?" 08jUVHdt return n; K{w=qJBM } k;:u| s8NS 36Z`.E>~L ^nm!NL{z^ } VQNH@g^gqr ]zMBZs }?q nwx. /* .HyiPx3^ **SiteInfoBean.java K~ /V */ xo_k"'f+ package NetFox; UCj#t!Mw Dp6"I!L<| 5~R{,]52 public class SiteInfoBean { S| -{wC% n_Hnk4 3{LvKe private String sSiteURL; //Site's URL +VW]%6+ private String sFilePath; //Saved File's Path 2Ku#j
(' private String sFileName; //Saved File's Name y`@4n.Q private int nSplitter; //Count of Splited Downloading File vls> 6h [c!vsh]^
iIEIGQx public SiteInfoBean() ~V-
o{IA {//nSplitter的缺省值为5 }]GK@nn7 //default value of nSplitter is 5 5sCky)N this("","","",5); b!HFv;^N } ;WAu]C| _ktSTzH0 ?d#(ian public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ?'#;Y"RT { n|,Vm@zV sSiteURL= sURL; MGC0^voe sFilePath = sPath; -bu. *= sFileName = sName; [3NV # this.nSplitter = nSpiltter; ~t3?er& R ,H(vD,54g 0|Ft0y`+ } !9cP NIi +~{nU' 0m!ZJH e public String getSSiteURL() )ZU#19vr7 { lz0]p return sSiteURL; KIY_EE$? }
8=Y|B5 qq%_ksQ ^[z\KmUqt public void setSSiteURL(String value) )3\rp$]1 { ZU@jtqq sSiteURL = value; ~9;mZi1- } *7V{yK$O| {Om3fSk: ^g){)rz| public String getSFilePath() ghQsS|)p. { M 6Z`Pwv]; return sFilePath; acZ|H } J;Xz'0 :*%\i' $!/ e/D\7Pf public void setSFilePath(String value) ,ZW.P` { ][qA@3^Tw sFilePath = value; Ip\g^ia } ;ypO' 54_m{&hb *YOnX7*Km public String getSFileName() 8-6{MJ?F { vKLG9ovlY return sFileName; H$iMP.AK } \/%Q PE8 WW@"75t N5]68Fu'({ public void setSFileName(String value) HY#("=9< h { 8(K~QvE~ sFileName = value; ]@]"bF!Dn } t$D[,$G9 2YEn)A@8 L| qY public int getNSplitter() [beuDZA { ,\RC gc return nSplitter; mM~Q!`Nf. } n!orM5=:O Y(mwJud| UM^hF% public void setNSplitter(int nCount) 5S?Xl|8E { Ek\Zi#f< nSplitter = nCount; ViONG]F } ;yoq/ } r2`?Ta aq**w?l TK1MmL /* 5Z0x2jV **Utility.java w8zQDPVB% */ JsdEA package NetFox; imuHSxcaV 8[XNFFUZs "K]4j]yU public class Utility { wOSNlbQ5jl bJvRQrj*3 _J`M>W)8 public Utility() t*$@QO { &$
9bC't6 a#@opUn- N* QI>kzU } !b
Km}1T yw^,@' //线程睡眠 iE{ SqX public static void sleep(int nSecond) aUQq<H 'R { Oms`i&}"} try{ B!lw>rUMQ Thread.sleep(nSecond); fe,CY5B{ } 7X"cu6%\ catch(Exception e) !o7.L%S { (yVI<Os{a e.printStackTrace (); VzNH% } dWEx55>,1 } b ;b1V ZGBcy}U(k //日志 9)`wd&! public static void log(String sMsg) :I8t}Wg { O\z%6:'M System.err.println(sMsg); fNumY|%3 } -8:@xG2 5VS<I\o} xC]/i(+bA public static void log(int sMsg) g>{=R|uO5 { [o "@*kf System.err.println(sMsg); 6{ Eh={:b } mD:!"h/ } 4D5)<3N=d' scmbDaOn #';r 0?| /* /nNHI34 **TestMethod.java 01b0;| */ K} @q+ package NetFox; 7Udr~0_) H}/1/5L lH8?IkK,g public class TestMethod { nN:i{t4f 3zkq'lZ n/-I7Q!;u public TestMethod() @,hvXl-G * { ///xx/weblogic60b2_win.exe BRT2 =}A try{ u=5^xpI<D SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); P]G2gDO //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); -3C~}~$>` SiteFileFetch fileFetch = new SiteFileFetch(bean); }j
QwP3eY fileFetch.start(); 3UEh%Ho }
zcc]5> catch(Exception e){e.printStackTrace ();} &F)lvtt| :v+39 V*)gJg } #gP\q?5Ov i=+ "[ h^ #Uo
9BM public static void main(String[] args) vU_#(jZ { }6\p7n new TestMethod(); :(Gg]Z9^8 } SExd-=G } @d)6LA9Ec 点击下载更多相关资料
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