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/* {vox
x&UX **SiteFileFetch.java ='Fh^]*5 */ \kEC|O)8 package NetFox; Y^-D'2P]P import java.io.*; ,ePl>m:Z
import java.net.*; !~fy".|x I~)A!vp nNpXkI: public class SiteFileFetch extends Thread { 82KWe= /4{IxQk -s&7zqW SiteInfoBean siteInfoBean = null; //文件信息Bean SmCtwcB1 long[] nStartPos; //开始位置 >^J long[] nEndPos; //结束位置 |H&&80I FileSplitterFetch[] fileSplitterFetch; //子线程对象 ,&iZ*6=X?0 long nFileLength; //文件长度 ?F/)<r boolean bFirst = true; //是否第一次取文件 DT[WO_= boolean bStop = false; //停止标志 o|Kd\<rY File tmpFile; //文件下载的临时信息 ]:}x 4O# DataOutputStream output; //输出到文件的输出流 6oy[0hj
PaZd^0'!Z //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Hh`HMa'q public SiteFileFetch(SiteInfoBean bean) throws IOException oz&RNB.K {
4b
1a? siteInfoBean = bean; X3R:^ff\ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); p@[n(?duC. tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); h)h%y)1 if(tmpFile.exists ()) 4MPR { EFzPt?l bFirst = false; RW|Xh8.O read_nPos(); 9" cyZO } $ 9
k5a else 3"LT '' { +@qIDUiF3 nStartPos = new long[bean.getNSplitter()]; ~*hCTqHvN nEndPos = new long[bean.getNSplitter()]; r:--DKt } J!d=aGY0- 9T%b#~?3P w-P;E!gTt 'H-hp
} YYF.0G} K8{ef 4azqH;i public void run() lQ!(lPh { 9{CajtN //获得文件长度 UY^TTRrH //分割文件 \:9<d@? //实例FileSplitterFetch $%.,=~W7 //启动FileSplitterFetch线程 `*y%[J,I# //等待子线程返回 pMV ?vH try{ *X8Pa;x if(bFirst) c]A @'{7 { 349BQ5ND nFileLength = getFileSize(); NfND@m{/ if(nFileLength == -1) ', P_a,\ { }#phNn6 System.err.println("File Length is not known!"); dZuPR } "1%\Fi l else if(nFileLength == -2) }% `f%/ { .$a|&P=S System.err.println("File is not access!"); iM M s3 } d"OYq else F0ylJ
/E { hq?F81 for(int i=0;i<nStartPos.length;i++) =kjD ]+l { cv-;fd>' nStartPos = (long)(i*(nFileLength/nStartPos.length)); fU|4^p) } +zZ]Txb( for(int i=0;i<nEndPos.length-1;i++) 5#mHWBGd7 { )WsR
8tk nEndPos = nStartPos[i+1]; -%TwtO<$'] } e,
}{$HStZ nEndPos[nEndPos.length-1] = nFileLength; d#|%h]
6 } lw_@(E]E } uoTc c|Kc A9y@v{txN lm|s% //启动子线程 wowWq\euY fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 7ea%mg\ for(int i=0;i<nStartPos.length;i++) &(h@]F! { &"DD&87N% fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >%A~ : siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), "rHPcp"m nStartPos,nEndPos,i); `a5,5}7v%` Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); s:ojlmPb fileSplitterFetch.start(); /$^SiE+N } Z_s]2y1 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >=/DCQ$ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); .p%V]Ka // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", O)c3Lm-w nEndPos = " + nFileLength); UaBNoD // fileSplitterFetch[nPos.length-1].start(); Ls'8 n^` `)" :PNhX2F //等待子线程结束 qRXHaQi@9 //int count = 0; .F3~eas //是否结束while循环 VVqpzDoXG boolean breakWhile = false; `KUL4) g~ qdo_YPG DTl&V|h$ while(!bStop) zS'{F>w { 7pM&))R write_nPos(); <7o@7r'0 Utility.sleep(500); 83F]d+n breakWhile = true; u.2^t:A RmQ>.? AmK g;9LS for(int i=0;i<nStartPos.length;i++) |-xKH.'n { $]MOAj"LH if(!fileSplitterFetch.bDownOver) U04)XfO;] { wsgT`M'J[ breakWhile = false; @B9#Hrc break; S2?)Sb` } YGhHIziI } x$KQ*P~q if(breakWhile) c3*9{Il^ break; P_(<?0l {6iHUK wrVR[v>E< //count++; %>t4ib_8 //if(count>4) +1Pu29B0 // siteStop(); zLg_0r*h1 } pIY3ft\ G{0f*
cH) 0G3T.4I System.err.println("文件下载结束!"); k[\JT[Mp } Vk%W4P"l catch(Exception e){e.printStackTrace ();} j#${L6 } j6Au<P t![972.& n6{nx[%7N7 //获得文件长度 B RtT 7 public long getFileSize() Tx(=4ALY { Ox6^=D" int nFileLength = -1; TSj)XU {W try{ \3whM6tK URL url = new URL(siteInfoBean.getSSiteURL()); yppXecFJ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 4|NcWpaV7 httpConnection.setRequestProperty("User-Agent","NetFox"); N|w;wF!3 *-gmWATC6 $}P>_bq int responseCode=httpConnection.getResponseCode(); e r"gPW if(responseCode>=400) ;V^ I>-fnm { V,eH E5C processErrorCode(responseCode); sNJ?Z"5k1h return -2; //-2 represent access is error Nrc-@ ] } >Vb V<ak D1EHT} Tx/KL%X String sHeader; s"l ^v5 F>at^6^ X
iM{YZ`B for(int i=1;;i++) q[+V6n`Z5 { W |+&K0M //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); \p\rPfY{> //Utility.log(in.readLine()); (ewcj\l4* sHeader=httpConnection.getHeaderFieldKey(i); IXsOTBM if(sHeader!=null) 8\[qR_LV { C12y_E8Un if(sHeader.equals("Content-Length")) N~B'gJJDx { `;&=m,
W' nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); = %wBC; break; #M92=IH } [bd?$qi } 2hTH else I#|ib break; 0!`!I0 } j{P3o<l&` } yJw4!A 1! catch(IOException e){e.printStackTrace ();} op|x~Thf catch(Exception e){e.printStackTrace ();} Do;rY\sY l%7^'nDn x2+M0 }g Utility.log(nFileLength); ; T WYO 1JN/oq; %`:+A?zL return nFileLength; ;sd] IZ$# } jce2lXMm %$F\o1S I)4NCjcCw //保存下载信息(文件指针位置) \fL:Ie private void write_nPos() VB{G%!} { 2|LkCu)~," try{ y#5;wb<1 output = new DataOutputStream(new FileOutputStream(tmpFile)); ^Xslj output.writeInt(nStartPos.length); RQ[6svfP for(int i=0;i<nStartPos.length;i++) Q3x.qz { [RHji47 // output.writeLong(nPos); mOx>p"n output.writeLong(fileSplitterFetch.nStartPos); ">S.~'ds output.writeLong(fileSplitterFetch.nEndPos); ~ph>?xuw } 6Q9S~YYq output.close(); ,T7(!)dR } 8 9f{8B]z catch(IOException e){e.printStackTrace ();} mKBPIQ+ZS catch(Exception e){e.printStackTrace ();} U+g<lgH1J } P3V}cGZ oOK&+r7 6-uB[$ko //读取保存的下载信息(文件指针位置) :@+@vM;gh private void read_nPos() *5;#+%A { j es[a try{ cGe-|>: DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); h:'wtn@l( int nCount = input.readInt(); yy|F6Pq3` nStartPos = new long[nCount]; Sc&p*G nEndPos = new long[nCount]; %ck/ Z for(int i=0;i<nStartPos.length;i++) Q
GDfX_
{ T13Jn o nStartPos = input.readLong(); .R{P%r nEndPos = input.readLong(); k%lz%r } j0[9Cj^%c input.close(); C@s;0-qL } =k22f`8ew catch(IOException e){e.printStackTrace ();} > v ]-B"Y catch(Exception e){e.printStackTrace ();} STgYXA( } /h73'"SpDy Iw) 'Yyg { Sn
J private void processErrorCode(int nErrorCode) d/`Q,Vl { ?BnjtefIe System.err.println("Error Code : " + nErrorCode); 4
g^oy^~ }
XvspE}~y ' fP`ET5 0CRk&_ht //停止文件下载 Kzgnhgc public void siteStop() ?AJE*=b { >pn5nn1a bStop = true; VtD:'L- for(int i=0;i<nStartPos.length;i++) 2s:$4]K D fileSplitterFetch.splitterStop(); >0qe*4n|M _m|Tr*i8 9 ~$'? } 96
!e:TU } RP4P"m( //负责部分文件的抓取 VCUEzR0 **FileSplitterFetch.java u|]`gsFZ\ */ VVyms7
VN package NetFox; \@HsMV2+zN 'VTLp.~G~ IF$*6
,v.z import java.io.*; =HkB>w)h import java.net.*; gnN"pa!&~ "FT(U{^7d w>ap8><4 public class FileSplitterFetch extends Thread { L@HWm;aN n:wZL&ZV0 s>^$: wzu String sURL; //File URL J 4OgV? long nStartPos; //File Snippet Start Position y6S:[Z{~A long nEndPos; //File Snippet End Position VaRP+J}UA. int nThreadID; //Thread's ID N/&t)7 boolean bDownOver = false; //Downing is over q
k+(Ccl boolean bStop = false; //Stop identical B`SHr"k!V[ FileAccessI fileAccessI = null; //File Access interface
6:vdo~ Xm!; -<tfbaA public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 'u{DFMB-A { x<%V&<z1g this.sURL = sURL; IDpW5Dc this.nStartPos = nStart; mlD 1 o this.nEndPos = nEnd; v}AVIdR nThreadID = id; <^(g<B`> fileAccessI = new FileAccessI(sName,nStartPos);//定位 >AT T<U= } yl[6b1 `<:D.9vO " A(Ss:7({ public void run() ;K9rE3
{ oH|<(8efD while(nStartPos < nEndPos && !bStop) ry%Fs&V*> { 1]<wZV}. APA:K9jD x#{.mN try{ =icynW^Fr URL url = new URL(sURL); z3:tSjF HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); T[YGQT|B httpConnection.setRequestProperty("User-Agent","NetFox"); +Ks! 9d*k< String sProperty = "bytes="+nStartPos+"-"; nmZJ%n httpConnection.setRequestProperty("RANGE",sProperty); (NBq!;_2,x Utility.log(sProperty); {b6$F[e It/IDPx4ga :"oQ _bLT InputStream input = httpConnection.getInputStream(); M@/Hd0$ //logResponseHead(httpConnection); KLn.vA. ;{k`nv_6 Y([YDn byte[] b = new byte[1024]; E{Ux|r~ int nRead; _v9P0W^.7 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) p7pJ90~E { Y@Zv52, nStartPos += fileAccessI.write(b,0,nRead); \tWFz( //if(nThreadID == 1) |#. J // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); c)tG1|Og] } ?{
0MF >$yqx1=jW GrB+Y!{{ Utility.log("Thread " + nThreadID + " is over!"); C<.Ny,U bDownOver = true; >[ox|_o //nPos = fileAccessI.write (b,0,nRead); ?Gq|OT8 } &~xzp^& catch(Exception e){e.printStackTrace ();} =R
<X!@ } sX~
`Vn& } 0"V L6$ ~j`;$o 7jZ=+2 //打印回应的头信息 4{s3S2f= public void logResponseHead(HttpURLConnection con) 2V1|b`b#4 { }op0`-Xb for(int i=1;;i++) [JY 1| N { w)hH8jx{ String header=con.getHeaderFieldKey(i); #0WGSIht< if(header!=null) {iI"Lt //responseHeaders.put(header,httpConnection.getHeaderField(header)); i@C1}o-/ Utility.log(header+" : "+con.getHeaderField(header)); : ;nvqb d else U;7Cmti" break; K6=i\ } VR @V3 ~ } FKOTv2 Y|NANjEAfm H40~i=. public void splitterStop() 02lI-xHe { k-$5H~(PZ bStop = true; g.3a5#t } KL8G2"Z 2k}" 52 )NoNgU\7! } (W~')A"hC' k_E
Jg;( {xFgPtCM /* 5@Y rtZI **FileAccess.java }, < dGmkx *//文件访问(定位,写) R d?8LLz package NetFox; |#_ F import java.io.*; s+@+<QE -A?6)ggf. m5wfQ_}}ss public class FileAccessI implements Serializable{ mzh8<w?ns m~[4eH, //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 H+ P&}
3 RandomAccessFile oSavedFile; W:s>?(6? long nPos; jf`QoK KlMSkdmW Ej\Me public FileAccessI() throws IOException C#^V<:9 { EpX.{B@B_[ this("",0); 4O TuX! } " vW4"R6 ;i)NP X 4jOq.j public FileAccessI(String sName,long nPos) throws IOException Ihd{@6m { N)kZ2|oD oSavedFile = new RandomAccessFile(sName,"rw"); t",=]k this.nPos = nPos; FZt a oSavedFile.seek(nPos); 6n|R<DO%\ } B<p-qPR K x1@`\r#0 n=z=%T6 public synchronized int write(byte[] b,int nStart,int nLen) ]^e4coC { CFLWo1 int n = -1; m-<"`:+ try{ 'n>v}__&| oSavedFile.write(b,nStart,nLen); vKcZgIR n = nLen; 'ie+/O@G } T{A_]2
G catch(IOException e) TFQX}kr] { b1*5#2rs. e.printStackTrace (); hT=6XO od4 } pie,^- _.g ezq<)gJc e5}KzFZmZ return n; Vr<eU>W } 3pk=c-x ]8m_+:`= <o aVI? } [z2jR(+`U ]c+HD* "PK`Ca@`v /* |z+K]R8_ **SiteInfoBean.java l0v]+>1i: */ f\|R<3 L package NetFox; F?!X<N{ 1MPn{#Ff J"$Y`; public class SiteInfoBean { Z ? F*Z0y vNA~EV02 =SUCcdy& private String sSiteURL; //Site's URL xoYaL private String sFilePath; //Saved File's Path Qy!;RaA3T private String sFileName; //Saved File's Name |Ok=aV7 private int nSplitter; //Count of Splited Downloading File oIJ.Tv@N( A*a:#'"*N 0dKv%X#\ public SiteInfoBean() 7`G
FtX} {//nSplitter的缺省值为5 `{B<|W$= //default value of nSplitter is 5 sN8)p%'Lg this("","","",5);
ds#om2) } 9i?Q=Vuc~< pR,eus;8 ar%!h~ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 2," ( { {SOy- sSiteURL= sURL; Rnd.<jz+Y sFilePath = sPath; mC,: .d sFileName = sName; 2Sha&Z*CE this.nSplitter = nSpiltter; \G~<O071 ~\QN.a |/M^q{h&7s } b-"kclK mR1|8H!f :rdnb=n public String getSSiteURL() Yo^9Y@WDW { C}D\^(nLu. return sSiteURL; z7PmyU
> } q(nPI l.Yq4qW 8ED}!;ZU public void setSSiteURL(String value) Es^=&2'' { TEEt]R-y sSiteURL = value; ,mY3oyu } rF:l+I] Vgg'5o&. $;Nw_S@ public String getSFilePath() 9u^ yEqG` { UVlXDebl return sFilePath; ySP%i6!au } Frd` u.I D3.$Vl,. G1?m}{D) public void setSFilePath(String value) SbX#$; ks~ { P6~&,a sFilePath = value; j3$\+<m] } Ae3=o8p
8n~ o=" }
>zl public String getSFileName() &f_ua)cyY { }u&,;] return sFileName; -q")qNt. } 1!"iN~ dZ;rn!dg> '6zk>rN public void setSFileName(String value) 9'I$8Su { $?M$^ -(e sFileName = value; mgL{t"$c } V=-hqo( .cCB,re FS^ie|8{D- public int getNSplitter() %&\DCAFk { u[b0MNE~ return nSplitter; .'Rz
tBv } ELa:yIl0 JM> 4m)h# y-R:-K XH= public void setNSplitter(int nCount) b[;Zl< { _2p D nSplitter = nCount; %YV3-W8S0 } 3^2P7$W= } Y. 1dk j"wbq-n,7 F0 ^kUyF| /* nX\Q{R2 **Utility.java [D= KI&@&O */ GGF;4 package NetFox; EhK~S(r^ 1WJ%n; ,mm9X\ ' public class Utility { s3+6Z~g'B #1VejeTi ^h~oxZJw public Utility() r3mQoTvnv { C#@>osC y1*z,"dx GkYD:o=qx } MB3 0.V/\ IKVS7m //线程睡眠 ?CHFy2%Y public static void sleep(int nSecond) Zrm!,qs { n}!D)Gx try{ <h[l)-86 Thread.sleep(nSecond); u(b Pdf@kz } O$$$1VHYo catch(Exception e) b]XDfe { D! $4 e.printStackTrace (); 6,:`esl } u8sK~1CPf } \r^*4P,, C$#X6Q!, //日志 bP3S{Jt-| public static void log(String sMsg) &Rxy]kBA { ;&?l1Vu System.err.println(sMsg); ^iz2=}Q8 } 9!UFLZR 81&5g' r5(-c]E7 public static void log(int sMsg) x39n7+j4 { l!9G System.err.println(sMsg); N%" /mcO } Mg^.~8\de } w$)E#|i 8j%hxAV$ "F8A:tR /* \[F4ooe **TestMethod.java .>bvI1 */ s\#eD0| package NetFox; nd?R|._R &]euL:C +'f38D* public class TestMethod { m(c5g[6nO e Zb8x *3r{s'm public TestMethod() a eo/4 { ///xx/weblogic60b2_win.exe BR[f{)a5 try{ 6yRxb( SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); +ziQ]r2g //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); r-SQk>Y} SiteFileFetch fileFetch = new SiteFileFetch(bean); '@Q
aeFm fileFetch.start(); ecl$z6'c } }iF"&b0n" catch(Exception e){e.printStackTrace ();} >xa k 1XvB,DhJ ]&kzIxh } 2 -
? q,H
0=\ JkM f+! public static void main(String[] args) Mk"V%)1k { $xU5vCwAo new TestMethod(); |Y42ZOK0 } SOPQg?'n=V } I];Hx'/<~ 点击下载更多相关资料
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