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/* GP,<`l& **SiteFileFetch.java ;YH[G;aJ */ %SA!p; package NetFox; ' Q7Y-V import java.io.*; 8Y{s;U0n import java.net.*; kiUk4&1 pIO4,VL;W r"wtZ]69 public class SiteFileFetch extends Thread { J;QUPpHZ $G!R,eQ 2QUx&u: SiteInfoBean siteInfoBean = null; //文件信息Bean c:\shAM& long[] nStartPos; //开始位置 T|) {< long[] nEndPos; //结束位置 6X_\Ve FileSplitterFetch[] fileSplitterFetch; //子线程对象 PHra+NY#A long nFileLength; //文件长度 AEg(m<t boolean bFirst = true; //是否第一次取文件 SvuTc!$? boolean bStop = false; //停止标志 63&^BW File tmpFile; //文件下载的临时信息 H lB]38 DataOutputStream output; //输出到文件的输出流 MXZ>"G uA~slS
Z //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) B3
zk(RNZ public SiteFileFetch(SiteInfoBean bean) throws IOException <~"lie1 { Poy^RpnX siteInfoBean = bean; YT-=;uK^S //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); #&Is GyU tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Hfc"L> if(tmpFile.exists ()) X?Pl<l& { 9F##F-%x bFirst = false; 46x.i;b7 read_nPos(); U
?b".hJ2 } (q;bg1\UK else ;hDa@3|]34 { <+U|dX nStartPos = new long[bean.getNSplitter()]; _D;@v?n6!O nEndPos = new long[bean.getNSplitter()]; *@S@x{{s } ^vni&sJ wEEn? WFv!Pbq, ,.mBJSE3 } +t!S'|C 0kDBE3i# R: Z_g!h public void run() 1~yZ T { #1/}3+=5B //获得文件长度 gNj7@bX~ //分割文件 SNY (* //实例FileSplitterFetch "v]%3i.*
- //启动FileSplitterFetch线程 D$r
Uid //等待子线程返回 ZI13 try{ VLvS$0(}Z if(bFirst) \
v2H^j/ { >lzA]aM$c nFileLength = getFileSize(); +RDJY(Y$ if(nFileLength == -1) :0~QRc-u { \;9W.d1iU System.err.println("File Length is not known!"); u=NG6G } UT]?;o" else if(nFileLength == -2) -4 Ux,9& { "Ij I'c System.err.println("File is not access!"); AHbZQulC } r@}bDkx else xyeA2Y { >hsuAU.UOR for(int i=0;i<nStartPos.length;i++) [~mGsXV { =JO^XwUOo nStartPos = (long)(i*(nFileLength/nStartPos.length)); Paf%rv2 } +]wuJSxc for(int i=0;i<nEndPos.length-1;i++) q9*MNHg} { <M+R\SH- nEndPos = nStartPos[i+1]; CboLH0Fa } v;2CU nEndPos[nEndPos.length-1] = nFileLength; )b4$A: } grom\ } p9[6^rjx8 >s EjR! ql{_%x? //启动子线程 .qD@
Y3- fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; p3x?[Ww for(int i=0;i<nStartPos.length;i++) yi6N-7 { O<*5$,K9 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %V_-%/3Z siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), /n5n
)P@L nStartPos,nEndPos,i); ZCui Fm Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); DDd/DAkCX fileSplitterFetch.start(); })F*:9i* } 1= VJ&D; // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6^F'|Wh siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); kdrod [S // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 1%~ZRmd e nEndPos = " + nFileLength); '+y_\ // fileSplitterFetch[nPos.length-1].start(); wa09$4>_w 4B[D/kIg E1V^}dn //等待子线程结束 msx-O=4g //int count = 0; +Ic ~ f1zh //是否结束while循环 k5BXirB boolean breakWhile = false; 2.I^Xf2 &9[P-w;7u n D6G while(!bStop) PX
O!t]* { >t+
qe/ write_nPos(); S;\R!%t_ Utility.sleep(500); @tT-JwU breakWhile = true; <^R{U&Z@ D{7w!z Qst$S} n for(int i=0;i<nStartPos.length;i++) ^4Uw8-/ 9 { |`O5Xs1{B if(!fileSplitterFetch.bDownOver) .T B"eUy { \_]En43mg breakWhile = false; H=c`&N7E break; L=!of{4Z(} } NTs7KSgZ } vp)Vb^K> if(breakWhile) v4vf}.L] break; p.JXSn ii|?; s95F#>dr //count++; sH#X0fG //if(count>4) _=f=f cl // siteStop(); : 3ZYJW1 } b'p4wE> DT(d@upH " {dek System.err.println("文件下载结束!"); #CUzuk& } o+ O}Te catch(Exception e){e.printStackTrace ();} [:;# ]? } n%%7KTqu ?;ukvD -.I4-6~ //获得文件长度 hlJpElYf public long getFileSize() IzLF'F { -6~' cm int nFileLength = -1; v1G"3fy9 try{ $9!D\N,}]C URL url = new URL(siteInfoBean.getSSiteURL()); R=)55qu HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); f>9s!Hpu_ httpConnection.setRequestProperty("User-Agent","NetFox"); ??qq: `s k) \gWPH *s4\\Wb= int responseCode=httpConnection.getResponseCode(); a>mMvc" if(responseCode>=400) @\P4/+"9 { *<4Em{rZ5 processErrorCode(responseCode); q?j|K|%
return -2; //-2 represent access is error `{K_/Cit } oDB`iiBXQ Qt>>$3]!! 77 r(*.O| String sHeader; vG.9H_& T3%C%BcX k\)Cw for(int i=1;;i++) .10y0FL4 { h:bru:ef //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); L{{CAB! //Utility.log(in.readLine()); O~Wt600{E sHeader=httpConnection.getHeaderFieldKey(i); s Kicn5 if(sHeader!=null) T Eu'*>g { /1w2ehE< if(sHeader.equals("Content-Length")) V\5 L?} { 1QqHF$S nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); cW8\d break; ,Ds.x@p } Z=S>0|`R } ;az5ZsvN
D else bJ /5|E? break; _D7 ]-3uC! } m#e3%150{ } ^]C&tG0 ! catch(IOException e){e.printStackTrace ();} |`d0^(X catch(Exception e){e.printStackTrace ();} xJ8%<RR!t ,zTb<g XL}"1lE Utility.log(nFileLength); *>8ce-PV yCz|{=7"j d 4?d4;{ return nFileLength; RIn9(r } FqFapRX66Z K*-@Q0"KM{ h@{_duu //保存下载信息(文件指针位置) |J5 =J private void write_nPos() 9O*_L:4o { 8|?LN8rp try{ &^&zR(o` output = new DataOutputStream(new FileOutputStream(tmpFile)); ;
0v>Rfa output.writeInt(nStartPos.length); m}
?rJ for(int i=0;i<nStartPos.length;i++) fnKY1y]2+ { =3~/:8o // output.writeLong(nPos); u+t$l^S output.writeLong(fileSplitterFetch.nStartPos); {LzH&qu output.writeLong(fileSplitterFetch.nEndPos); Z)9g~g94 } {XurC}#\ output.close(); BP[|nL
} ^ZDBO/ catch(IOException e){e.printStackTrace ();} w~R`D catch(Exception e){e.printStackTrace ();} 07g':QU@ } [4&#*@ eW'2AT?2H% B?rSjdY4 //读取保存的下载信息(文件指针位置) qml2XJ> private void read_nPos() BQ</g* $; { `/&SxQB< try{ Z;Rp+X DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); pv!oz2w1 int nCount = input.readInt(); [%A4]QzWh nStartPos = new long[nCount]; `Pn[tuIO nEndPos = new long[nCount]; U:6W+p8 for(int i=0;i<nStartPos.length;i++) 3voT^o { d&8 APe nStartPos = input.readLong(); tMx}*l|] nEndPos = input.readLong(); QYb33pN| } V&]DzjT/ input.close(); |! SOG } I&|f'pn^< catch(IOException e){e.printStackTrace ();} )D-c]+yt catch(Exception e){e.printStackTrace ();} _?voU } <|Yj%f qZEoiNH(Tj M6r^L6$N private void processErrorCode(int nErrorCode) LK9g0_ { $4FX(O0Q@ System.err.println("Error Code : " + nErrorCode); s?Uh| BfB } ZSy?T %#L]]-% 2?C`4AR[2H //停止文件下载 =,!\~`^ public void siteStop() ?YM4b5!3T { /Ss7"*JLe bStop = true; d@0Kr5_ for(int i=0;i<nStartPos.length;i++) b
IW'c_
, fileSplitterFetch.splitterStop(); DciwQcG UM*jKi2]" <AlZ]~Yct } #3=P4FUz. } ?Ucu#UO //负责部分文件的抓取 sd#|3 **FileSplitterFetch.java 3ss6_xd+ */ }ov&.,vQ package NetFox; Dq@2-Cv Z BUArIC W,@
If} import java.io.*; &5{xXWJK import java.net.*; -tsDMji~V ;!<
Znw 5F|8?BkOL^ public class FileSplitterFetch extends Thread { 6pOx'u>h+ nn b8Gcr /%aiEhL String sURL; //File URL Syp"L;H8Em long nStartPos; //File Snippet Start Position 88"Sai long nEndPos; //File Snippet End Position 3=Ec" int nThreadID; //Thread's ID <mMTD8Sx] boolean bDownOver = false; //Downing is over P|2E2=G boolean bStop = false; //Stop identical `cQo0{xK FileAccessI fileAccessI = null; //File Access interface F
09DV<j Do%-B1{ri \o-&f: public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ZR v"h/~ { + 1IQYa| this.sURL = sURL; /"H`.LD.? this.nStartPos = nStart; w=h1pwY this.nEndPos = nEnd; p Rdk>Ph nThreadID = id; 7?gFy- fileAccessI = new FileAccessI(sName,nStartPos);//定位 3cS2gxF } *=ZsqOHwG U'UQ|%5f :4)Qt public void run() qjAWeS/ { b*fgv9Kh' while(nStartPos < nEndPos && !bStop) [+*$\ { /WV7gO&L1 )Dp/('Z2 LLWB try{ R.[Z]-X URL url = new URL(sURL); _{vkX<s HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); j6~nE'sQ httpConnection.setRequestProperty("User-Agent","NetFox"); X7UuwIIP String sProperty = "bytes="+nStartPos+"-"; qzw'zV httpConnection.setRequestProperty("RANGE",sProperty); iGDLZE+? Utility.log(sProperty); c H-@V< E Uar/ 0qjXQs} InputStream input = httpConnection.getInputStream(); G'zF)0oD //logResponseHead(httpConnection); ;VO.!5W@eg aKUS5jDu .O*bILU byte[] b = new byte[1024]; )4?x5# int nRead; Ed0I WPx while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 9jp:k><\(c { @\oz4^ nStartPos += fileAccessI.write(b,0,nRead); v]%WH~> //if(nThreadID == 1) *?+V65~dW // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Giq=*D+ } B()/.w?A fW`&'! kY,U8a3! Utility.log("Thread " + nThreadID + " is over!"); i`/+,< bDownOver = true; b5m=7;u*h //nPos = fileAccessI.write (b,0,nRead); MC0TaP } #zrTY9m7 catch(Exception e){e.printStackTrace ();} m|=Ecu } cw&Hgjj2
} .*$OQA O9'x-A% ;
UiwH //打印回应的头信息 MRr</o public void logResponseHead(HttpURLConnection con) \ 6EKgC1 { !/ y!QXj for(int i=1;;i++) @`-[;?> { {:c]|^w6 String header=con.getHeaderFieldKey(i); M L7\BT if(header!=null) /!}'t //responseHeaders.put(header,httpConnection.getHeaderField(header)); ODc9r } Utility.log(header+" : "+con.getHeaderField(header)); ;o/>JHGj else Hv]7e| break; E@a3~a } _8}QlT } zJ+8FWy:S ,U)"WLmY Kx"<J@ public void splitterStop() SxyONp.$\ { w|mb4AyL{? bStop = true; KtS)'jf } :RSz4 EA.D}X C M,j(=hRJ/E } zPEg _ 46X%k 2;L|y._`w /* y5= `ap **FileAccess.java RWgDD;&_[a *//文件访问(定位,写) *xf ._~E package NetFox; 6b8;}],| import java.io.*; EzW)'Zzw~ dk
QaM@ <";,GaZQ public class FileAccessI implements Serializable{ t3Z_Dp~\ uUE9g //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 UV}73Sp RandomAccessFile oSavedFile; 9/ SXs0 long nPos; ej&<GM| sDgXU@ IYWjHE+)d public FileAccessI() throws IOException >Sa*`q3J { Z') pf this("",0); :"6q,W } Nf+b"&Zh` $d+DDm1o j9qREf9) public FileAccessI(String sName,long nPos) throws IOException f:zFFpP.j@ { ,3v+PIcMM+ oSavedFile = new RandomAccessFile(sName,"rw"); s#h8%[' this.nPos = nPos; Q|}aR:4 oSavedFile.seek(nPos); 0Q"u#V Sp } @L84>3O #6+FY+/ rA0,`}8\ public synchronized int write(byte[] b,int nStart,int nLen)
N-lGa@ j { 6*9}4` int n = -1; h:XzUxL\ try{ 8,?v?uE oSavedFile.write(b,nStart,nLen); -3Avs9`5 n = nLen; [LT^sb } SgMrce<; catch(IOException e) HQ9f ,< { F Kc;W e.printStackTrace (); E}CiQUx } R cY>k )T907I| l=`L7| ^/d return n; @vgG1w } 3>zN/f Fhq9D{TeY, I4rPHZ| } 8pM>Co! C8@TZ[w ZA~Z1Mro#" /* v,NHQyk **SiteInfoBean.java 7Y=cn_
wU */ d
{lP package NetFox; ?:^mBb)T n?#!VN3 Z>F^C}8f public class SiteInfoBean { C7T(+Wd!, IWVlrGyM t<uYM private String sSiteURL; //Site's URL fBBa4"OK= private String sFilePath; //Saved File's Path 8$xPex~2 private String sFileName; //Saved File's Name l>lW]W private int nSplitter; //Count of Splited Downloading File ]!1OH
|Ad +ww^ev% O9v_y+M+M public SiteInfoBean() Mr+@c) {//nSplitter的缺省值为5 < V\Y@Ei+ //default value of nSplitter is 5 7RU}FE this("","","",5); ~:;3uLs,8 } 5OM?3M `|1MlRM9 2.}R public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) q^8EOAvnZ { k1z$e*u&r sSiteURL= sURL; $
E1Tb{' sFilePath = sPath; )j6eE+gF sFileName = sName; Q^}%c
U0 this.nSplitter = nSpiltter; ?<X(]I.j 0m[dP \a"Ct' } u]C`6)> O(2cWQ BOlAm*tFt public String getSSiteURL() i< (s}wg { QrD o|GtE return sSiteURL; t$&Qv) } ,lYaA5&I Q+|{Bs)6i1 k>4qkigjc public void setSSiteURL(String value) OQ/<-+<w { ^jdL@#k00 sSiteURL = value; |wxGpBau } ~KjJ\b)R ;:&?=d VBoMT:# public String getSFilePath() HCA{pR` { -ML6d&cm return sFilePath; B,$l4m4 } &znH!AQ0 HgBJf~q~U PsjbR public void setSFilePath(String value) ]*"s\ix { XY7Qa!>7j sFilePath = value; Ar9nBJ` } /k\01hc` *xRc *
:0 T*2C_oW public String getSFileName() R5Yl 1 { /z."l!u6 return sFileName; 7D" %%|:
h } ul7o%Hs =?}twC$ r >{G`de4 public void setSFileName(String value) :LJ7ru2 { :bM+&EP sFileName = value; `linG1mF } 8"'x)y '3tw<k!1{. H!r &aP public int getNSplitter() ;uI~BV*3 { /4S;QEv return nSplitter; 4 (?MUc } E,G<_40 ;#?M)o:q ucYkxi`x public void setNSplitter(int nCount) IxSV? k
{ >X}{BDMb. nSplitter = nCount; u/^|XOy } )-P!Ae_.v } #5CI)4x0! dZ2%S''\ 7 &)])
{Q /* R zR?&J **Utility.java +`en{$%% */ wJ"ev.A) package NetFox; }Ag|gF!_ SQ(apc}N4 J}g~uW public class Utility { R|,7d:k x2wg^$F*oO X33v:9= public Utility() N{akg90 { HQVh+ ( 0A$SYF$O+[ oN2=DYC41 } iSp e=f .y< //线程睡眠 8:;#,Urr public static void sleep(int nSecond) D!>
d0k,Y { e$l6gY try{ LVtu*k Thread.sleep(nSecond); 9/TY\?U } a<Uqyilm catch(Exception e) 9w^zY;Y { - V) R< e.printStackTrace (); 3P=w =~e } z_SagU,\ } <+E%E4 -e`;bX_N) //日志 `7Ug/R< public static void log(String sMsg) 1$LI px { tm)*2lH6 System.err.println(sMsg); ~t/JCxa } Hhv$4;&X q^Tis>*u6 -WR}m6yMr public static void log(int sMsg) NrJzVGeS { iyM^[/-R6 System.err.println(sMsg); /A(NuB<Pq } UVX"fZ) }
IsYP0(L 3B9nP._ YB!!/ SX4 /* (!zM\sF **TestMethod.java Z!\@%`0$ */ xfHyC'? package NetFox; !Tfij(91 F>Jg~ FD* iBbbr, public class TestMethod { 2w1tK M []OHw >Q2). E public TestMethod() R{3CW^1 { ///xx/weblogic60b2_win.exe bEpMaBN try{ J/Q|uRpmqr SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); j7/(sf //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); X%4h(7;v SiteFileFetch fileFetch = new SiteFileFetch(bean); !Yh}H<w0 fileFetch.start(); pCt}66k} } Fj=NiZ= catch(Exception e){e.printStackTrace ();} 0'yyfz U"5q;9#q ])$S\fFm } tV`&-H Pz473d {'~sS public static void main(String[] args) ,IjdO(?TC { o/JPYBhdl new TestMethod(); g_ M-F } 6E+=Xi } &BgU:R, 点击下载更多相关资料
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