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/* la{Iqm{i **SiteFileFetch.java 1vUW$)?X */ }&Kl)2:O package NetFox; rJUXIV>z import java.io.*; vD3j(d import java.net.*; SU>cJ* <MzXTy3\ oa2v/P1` public class SiteFileFetch extends Thread { Pt[ b;} L6n<h 5rlZ'>I. SiteInfoBean siteInfoBean = null; //文件信息Bean s8|Fe_ long[] nStartPos; //开始位置 @8"cT- long[] nEndPos; //结束位置 (c|Ry[$| FileSplitterFetch[] fileSplitterFetch; //子线程对象 =L9;8THY long nFileLength; //文件长度 f0]`TjY boolean bFirst = true; //是否第一次取文件 r0j+P% boolean bStop = false; //停止标志 ' T%70)CM~ File tmpFile; //文件下载的临时信息 Ot([5/K DataOutputStream output; //输出到文件的输出流 $ i;_yTht x
A"V!8C //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) )Oix$B!- public SiteFileFetch(SiteInfoBean bean) throws IOException D9;s% { bXRSKp[$ siteInfoBean = bean; GjeRp|_Qd< //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); VK3e(7b tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Yu_`
>so if(tmpFile.exists ()) rO7[{<97m { i8i~b8r] bFirst = false; O~&j}WN read_nPos(); _ Y8jl,J } J*m~fZ^ else 8c5%~}kG { R~H +.Vh nStartPos = new long[bean.getNSplitter()]; \Ws$@J-M nEndPos = new long[bean.getNSplitter()]; -$tf` } WNWtQ2] &LDA=B &7L g)PG BZ}_ } &.)ST0b4 z%~rQa./$ 7xoq:oP-}N public void run() z%44@TP { xay~fD //获得文件长度 Ae|bAyAK //分割文件 j,CVkA*DY //实例FileSplitterFetch ^Kfm(E //启动FileSplitterFetch线程 7]lUPLsl //等待子线程返回 Zil<*(kv{ try{ vd#BT$d? if(bFirst) `|f1^C^ { $.T\dm- nFileLength = getFileSize(); }CB9H$FkCY if(nFileLength == -1) |P(8T' { k btQ System.err.println("File Length is not known!"); )F65sV{ } EJaGz\\ else if(nFileLength == -2) s]Qo'q2 { S/)yi System.err.println("File is not access!"); =sh3&8 } ~xU\%@I\ else m`6=6(_p { [['
(,,r for(int i=0;i<nStartPos.length;i++) rkWiGiisM { :3.!?mOe2 nStartPos = (long)(i*(nFileLength/nStartPos.length)); 'NSfGC%7R } [kL`'yi for(int i=0;i<nEndPos.length-1;i++) ;I!Vba { Cm~z0c|T nEndPos = nStartPos[i+1]; 9Je+|+s] } h$$2(!G4 nEndPos[nEndPos.length-1] = nFileLength; H rI(uZ] } lCiRvh1K } e(Y5OTus a}5/?/ &"mWi-Mpl //启动子线程 ~R
C\ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; )bl^:C for(int i=0;i<nStartPos.length;i++) "eZ~]m}L0 { UB3hC`N\ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), \CVrLn;} siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), c%5Suu(J6 nStartPos,nEndPos,i); /[,0,B9!3 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); pv@w 8* fileSplitterFetch.start(); k4`(7Z } @ *n oma // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,^@z;xF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); /f]'_t0\. // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ) 8 %lZ{ nEndPos = " + nFileLength); !T$h?o // fileSplitterFetch[nPos.length-1].start(); @: K={AIa $64sf?aZ># ?d`j} //等待子线程结束 8<PQ31 //int count = 0; 2g$;ZBHO|8 //是否结束while循环 xy+hrbD)j boolean breakWhile = false; Uj twOv|pF NQIbav^5 QW=
X#yrDO while(!bStop) p"d_+ { dlCmSCp% write_nPos(); ~en' E Utility.sleep(500); >\'gIIs breakWhile = true; U)] }EgpF z4wG]]Kh* iE,/x^&,& for(int i=0;i<nStartPos.length;i++) A1F!I4p5 { k293wS if(!fileSplitterFetch.bDownOver) $<F9;Z { I
T gzD"d breakWhile = false; m\@ q2l- break; .RN2os{ } L&G5 kY` } WuMr";2*E if(breakWhile) `P?!2\/ break; R/Te;z k]~|!` 37 d-! //count++; +
;_0:+// //if(count>4) 7O<K?;I // siteStop(); OEhDRU%k } b{a\j% >8%O;3-m# |G(I,EPag System.err.println("文件下载结束!"); Uu~~-5 } As>P( catch(Exception e){e.printStackTrace ();} Aga{EKd } h=ben&m MTAq}8 DTz)qHd#X //获得文件长度 i^}ib
RQbN public long getFileSize() "Zu>cbE { Hgbrlh int nFileLength = -1; 9@wmngvM*Y try{ {;+9A}e URL url = new URL(siteInfoBean.getSSiteURL()); /dwj:g0y HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >(C5&3^ httpConnection.setRequestProperty("User-Agent","NetFox"); H&uh$y@ f J+ (x140_TH~ int responseCode=httpConnection.getResponseCode(); T0"q,lrdxV if(responseCode>=400) Bj*
M
W { |Fe*t processErrorCode(responseCode); Huf;A1. return -2; //-2 represent access is error :ioD*k } AYv7-!Yk Ypwn@?xeP 5E0dX3- String sHeader; `qhZZ{s)1U %s ">: :|\)=4 for(int i=1;;i++) w:/QB-`% { 2-beq<I //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); RSBk^ //Utility.log(in.readLine()); yeIcQ% sHeader=httpConnection.getHeaderFieldKey(i); li9>zjz if(sHeader!=null) S)x5.vo^ { MR/gLm(8( if(sHeader.equals("Content-Length")) XvI Y=~ { PH>`//D%n? nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Ny
G?^ break; $PFE>=nM } \CrWKBL } =`.OKUAn else wW|[Im& break; ZiC~8p_f } 2<tU } cBQ+`DXn5c catch(IOException e){e.printStackTrace ();} \-CL}Z}S catch(Exception e){e.printStackTrace ();} H0-v^H>^ La
r9}nx0 SHRn$< Utility.log(nFileLength); WB3YN+Xl3 Lc_cB` );d"gv(]D return nFileLength; *Qy,?2 } aRcVoOq 0gH;y+\=* e@{Rlz //保存下载信息(文件指针位置) Y?\PU{O private void write_nPos() UnOcw { *H~&hs>k try{ 3M5wF6nY[[ output = new DataOutputStream(new FileOutputStream(tmpFile)); I}u&iV` output.writeInt(nStartPos.length); qkBCI,X_Y for(int i=0;i<nStartPos.length;i++) GuKiNYI_ { U &RZx&W // output.writeLong(nPos); J
}|6m9k! output.writeLong(fileSplitterFetch.nStartPos); i= jYl output.writeLong(fileSplitterFetch.nEndPos); @.} @K } R<;;Ph output.close(); t^"8
v3'h } Z ty9O8g catch(IOException e){e.printStackTrace ();} 23/;W| catch(Exception e){e.printStackTrace ();} naVbcY } HM &"2c 3|=L1Pw# c+501's //读取保存的下载信息(文件指针位置) i!yE#zew private void read_nPos() G$VE
o8Blb { sf8F h try{ 6Cgc-KNbk DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); .q|k459oi int nCount = input.readInt(); NR98]X nStartPos = new long[nCount]; :H>0/^Mg0 nEndPos = new long[nCount]; w+iIay for(int i=0;i<nStartPos.length;i++) a;=IOQ {
bU$M) nStartPos = input.readLong(); gjn1ha"h%. nEndPos = input.readLong(); }ZJJqJ`*e } .p(%gmOp# input.close(); ei(S&u< } yaYJmhG catch(IOException e){e.printStackTrace ();} =Y5_@}\0 catch(Exception e){e.printStackTrace ();} CTJwZY7 } mX[J15 rDv`E^\ yaPx=^& private void processErrorCode(int nErrorCode) 1 Q*AQYVY { JC
iB;!y System.err.println("Error Code : " + nErrorCode); fndbGbl8p } RaOLy \ Y|E rVf4 wY"BPl]b //停止文件下载 Y6m:d&p=} public void siteStop() /xCX. C { P DwBSj bStop = true; jmF)iDvjuZ for(int i=0;i<nStartPos.length;i++) PxA
OKUpI fileSplitterFetch.splitterStop(); +#9 4X)* E_\V^ w9675D+ } 1AQy8n*
} ?{\h`+A //负责部分文件的抓取 }WHq? **FileSplitterFetch.java r9n:[A&HE */ -Eoq#ULvR package NetFox; L| ;WE= otlv;3263 eU\XAN#@ import java.io.*; *z&hXYm import java.net.*; +*wr=9> t&~*!w!+jH yz=aJ
v;
H public class FileSplitterFetch extends Thread { 8khIy-9-' -PTfsQk }^2'@y!( String sURL; //File URL onl,R{,`0 long nStartPos; //File Snippet Start Position Z29aRi long nEndPos; //File Snippet End Position B`:l;<&jX int nThreadID; //Thread's ID f o idneus boolean bDownOver = false; //Downing is over TQth"Cv2: boolean bStop = false; //Stop identical ]q/USVj{ FileAccessI fileAccessI = null; //File Access interface O=oIkvg . f!dH L;v.X'f public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 51xf.iB { |)S*RQb\ this.sURL = sURL; .R)uk this.nStartPos = nStart; 51;[R8'w this.nEndPos = nEnd; a\}`
f=T nThreadID = id; *Tr9pq%m fileAccessI = new FileAccessI(sName,nStartPos);//定位 B+MnT{ } KxDp+]N]
AWd,qldv Cv[1HO< public void run() nPk&/H%5hn { +'wO:E1( w while(nStartPos < nEndPos && !bStop) `><E J'h { &0]5zQ vRH2[{KQ9 )KOIf{ try{ }i J$&CJ URL url = new URL(sURL); tVh"C%Vkr HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ] !n3j=* httpConnection.setRequestProperty("User-Agent","NetFox"); Pbt7T
Q String sProperty = "bytes="+nStartPos+"-"; IyAD>Q^ httpConnection.setRequestProperty("RANGE",sProperty); A9MTAm{ Utility.log(sProperty); :*s@L2D6 D 9UM8Hxi k 7:Z\RGy InputStream input = httpConnection.getInputStream(); -b|"%e<' //logResponseHead(httpConnection); R2JPLvs J$lfI^^ %M:$ML6b< byte[] b = new byte[1024]; w~yC^` int nRead; zbgGK7 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ]E6r)C { x"r,l/gzy nStartPos += fileAccessI.write(b,0,nRead); k8r1)B4ab //if(nThreadID == 1) wNU;gz // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); j4u
["O3 } M3r;Pdj2r VOIni<9y eD7qc1*G Utility.log("Thread " + nThreadID + " is over!"); mtdy@=?1Y bDownOver = true; r AE5.Q!u //nPos = fileAccessI.write (b,0,nRead); |a%Wd } hzT)5'_ catch(Exception e){e.printStackTrace ();} F|@\IVEB] } Wg2 0H23XW } '.C#"nY>1 UuC-R) VfUHqdg- //打印回应的头信息 $Ggnn# public void logResponseHead(HttpURLConnection con) RC?vU { nLx|$=W for(int i=1;;i++) 6OoOkNWF { 6b9J3~d\E String header=con.getHeaderFieldKey(i); a$Hq<~46 if(header!=null) ~+ 9vz //responseHeaders.put(header,httpConnection.getHeaderField(header)); *eX/ZCn Utility.log(header+" : "+con.getHeaderField(header)); M&)\PbMc else _EJP I break; 3_`)QYU' } \0vs93>? } jAU&h@ N9*:]a uP(t+}dQ+3 public void splitterStop() IUNr<w< { "YWZ&_n** bStop = true; .rS.
>d^n } vn!3Z! dm( jw`05rw: sG)aw`_j } jOzi89 xaVn.&Wl y#th&YC_b /* 1z4_QZZ.NG **FileAccess.java -y{(h%6 *//文件访问(定位,写) 'GT^araz package NetFox; '#=0q import java.io.*; %V+"i_{m :H wdXhA6 s;Gg public class FileAccessI implements Serializable{ )(_NFpM H5V>d //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 esj6=Gh RandomAccessFile oSavedFile; 2pU'&8 long nPos; DR,7rT{$ '#h ORQB 5-y*]:g( public FileAccessI() throws IOException ,II3b(l { LrT EF
j this("",0); \P")Eh =d } V)l:fUm2
`*B V@ 6q>}M public FileAccessI(String sName,long nPos) throws IOException &9|L Z9K { S[zGA<} oSavedFile = new RandomAccessFile(sName,"rw"); d4*SfzB this.nPos = nPos; ' QMcQvU oSavedFile.seek(nPos); u&^KrOM@# } '&dT "j8)l4} ,B_c public synchronized int write(byte[] b,int nStart,int nLen) N-_APWA { K&Bbjb_| int n = -1; Em^~OM3U$q try{ M=lU`Sm oSavedFile.write(b,nStart,nLen); d~QM@<SV n = nLen; w;j<$<4=7 } >TY;l3ew catch(IOException e) _U-`/r o { 9}m?E<6& e.printStackTrace (); GBT|1c'i } !|UX4 X^K^az&L /t`\b
[ return n; cz{`'VN}` } {\CWoFht> 0c`nk\vUy c)B3g.C4m } 6h2keyod J"LLj*,0" (RV#piM /* >}%#s`3W1_ **SiteInfoBean.java AvB=/p@] */ IZ7o6Etti package NetFox; _+NjfF| 2#sFY/@ [DH4iG5 public class SiteInfoBean { $
P5K Pd\4hy Fa[^D~$l* private String sSiteURL; //Site's URL )Uy%iE* private String sFilePath; //Saved File's Path !Q15qvRS private String sFileName; //Saved File's Name *DC/O(
0 private int nSplitter; //Count of Splited Downloading File ]& ckq l nHY?y7{ peBHZJ``RX public SiteInfoBean() #qYgQ<TM! {//nSplitter的缺省值为5 PA
?2K4 //default value of nSplitter is 5 HI 1T this("","","",5); 7Q9Hk(Z9 } OKlR`Vaty D
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nM| public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) A,~KrRd { nJ]7vj,rB sSiteURL= sURL; 4
ZnQpKg sFilePath = sPath; WA~[)S0 sFileName = sName; $wp>2 this.nSplitter = nSpiltter; )9_W"'V xc 1d[dCdp _<#92v!F } 3*~`z9-z SsTBjIX 6qFzo1LO public String getSSiteURL() $f0u { {VW\EOPV~ return sSiteURL; 2HmK['( } ch]Qz[d T`":Q1n <O0tg[ub public void setSSiteURL(String value) i0K 2#}=^ { PdqvXc sSiteURL = value; ?Y3i-jY } Zf3(!
a[ Ig}hap]G 5=I({=/> public String getSFilePath() e'A_4;~@s { BInSS*L return sFilePath; Lv['/!DJ| } * @]wT' hdx_Tduue 9 da=q public void setSFilePath(String value) (WC
=om { [mu8V+8@d4 sFilePath = value; #$xtUCqX } slPr^) Gg9s.]W P|@[D=y public String getSFileName() }6\,kFc { ?V8Fgd return sFileName; XXum2eA } 4"kc(J`c v77UE"4|c f?tU5EX public void setSFileName(String value) Rf8Obk< { `WOoC sFileName = value; ftTD-d } jn|NrvrX GqL&hbpi 5@%Gq)z5 public int getNSplitter() \ YF@r7 { 4;J.$ return nSplitter; >~Zj } X}(X\rp [-VH%OM j!i*& public void setNSplitter(int nCount) 8xAI n>,_ { oQ
r.cKD ? nSplitter = nCount; STjb2t,a } %C,zR&]F } A?#i{R xjbI1qCfe 9nc_$H{ /* .:}<4;Qz94 **Utility.java [;,E cw^ */ fVgK6?<8^ package NetFox; }Y.YJXum T90O.]S *W\ 3cS public class Utility { qfl!>
KJoa^e;~ X5/j8=G H` public Utility() 'uL$j=vB { yg'CL/P W`9{RZ' vw!7f|Pg ~ } "KK}}$> ,H"}Rw //线程睡眠 1q!k#Cliu public static void sleep(int nSecond) 1$03:ve1 { J' P:SC1 try{ k
6[ Thread.sleep(nSecond); eK1l~W% } d^RcJ3w catch(Exception e) HN NeH;L { ?
bWc<] e.printStackTrace (); k8}fKVU; } ASoBa&vX } p1niS:}j e_ epuki //日志 ZrEou}z(* public static void log(String sMsg) 153*b^iDBh { 18%$Z$K, System.err.println(sMsg); A,EG0yb } 8Gy]nD 2EpQ(G
J h )Y.jY public static void log(int sMsg) y|O3*`&m { TDR|*Cs System.err.println(sMsg); Q3l>xh } |+Rx) } v1yB [C4{C4TX q[qX O5 /* 8BAe6-*S8 **TestMethod.java s-Gd{=%/q */ ;q9Y%* package NetFox; {=
&&J@: -FZNk} 1VFCK& public class TestMethod { #]c_2V F-:AT$Ok `$1A;wg< public TestMethod() TxQsi"0c { ///xx/weblogic60b2_win.exe SHPDbBS try{ X1B)(|7$ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); }o!b3*# //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); WP\kg\o SiteFileFetch fileFetch = new SiteFileFetch(bean); j7g>r/1eE fileFetch.start(); \kyoA
Z } bz nMD catch(Exception e){e.printStackTrace ();} \Kui`X nnRb X{cB%to } *^[6uaa ckFPx l. >?JUGXAi'{ public static void main(String[] args) )UU`uzU;u { B=W#eu
<1 new TestMethod(); 3'L =S } :dipk,b?n } mm#UaEp 点击下载更多相关资料
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