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/* ^b=XV&{q **SiteFileFetch.java *MI)]S */ t')h{2&&!2 package NetFox; Khj=llo, import java.io.*; c)03Ms4
D import java.net.*; 8\DME JPLI
@zX^ L%f;J/ public class SiteFileFetch extends Thread { Ss 2$n C,.-Q"juH $:e)$Xnn- SiteInfoBean siteInfoBean = null; //文件信息Bean x:qr \Rz long[] nStartPos; //开始位置 mY`@' long[] nEndPos; //结束位置 lj*8mS/;h FileSplitterFetch[] fileSplitterFetch; //子线程对象 Yc
d3QRB long nFileLength; //文件长度 YxJ`-6 boolean bFirst = true; //是否第一次取文件 ~6kJ~R4 boolean bStop = false; //停止标志 v~}5u
5$O File tmpFile; //文件下载的临时信息 @HvScg*Y DataOutputStream output; //输出到文件的输出流 b_vVB`> !_dR' //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) *="m3:c'J public SiteFileFetch(SiteInfoBean bean) throws IOException ~5ubh2{ { |YRY!V_w siteInfoBean = bean; _jmkl
B //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); o!utZmk$ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 8)Zk24:])_ if(tmpFile.exists ()) s@s/'^` { T/5"}P` bFirst = false; y@`~ 9$ read_nPos(); 8?1o<8hV } 5U~OP else \yG`Sfu2 { @zrNN> nStartPos = new long[bean.getNSplitter()]; U*qNix nEndPos = new long[bean.getNSplitter()]; ec?V[v
} -w ~(3( +0"x|$f~ 2e.N"eLNt #k9< } 8R}K?+] 4uUs7T U(~U!O} public void run() sT`^ljp4 { g4wZvra6%) //获得文件长度 Gs_qO)~xo //分割文件 %2D17*eK //实例FileSplitterFetch DbtF~`3, . //启动FileSplitterFetch线程 <0 uOq //等待子线程返回 @rwU 1T33 try{ jV^C19 if(bFirst) ]'k[u { hwVAXsF~ nFileLength = getFileSize(); ],[)uTZc if(nFileLength == -1) *d>vR1 { 94{)"w] System.err.println("File Length is not known!"); .oR3Q/|k] } 2]2H++ else if(nFileLength == -2) <GF @L { M4?8xuC System.err.println("File is not access!"); O!^; mhy" } j[XYj6*d else L2fVLKH { M&y5AB0 for(int i=0;i<nStartPos.length;i++) xo Gb { }1U*A#aN7K nStartPos = (long)(i*(nFileLength/nStartPos.length)); ArzDI{1 } I4D<WoU;dJ for(int i=0;i<nEndPos.length-1;i++) Nfw YDY { '7tBvVO_ nEndPos = nStartPos[i+1]; 73
V"s } |pW\Ec#( nEndPos[nEndPos.length-1] = nFileLength; VVuR+=.& } |nY~ZVTt/ } =_PvrB 2' >]&X ^V%Q# XmWlv{T+ //启动子线程 </s,pe79B fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; %0XvJF)s for(int i=0;i<nStartPos.length;i++) I:$"E%
>= { ."mlSW"Wm fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Wx]d $_ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Qhy#r nStartPos,nEndPos,i); 4D"4zp7 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); HY)ESU
! fileSplitterFetch.start(); {TAw)!R~ } %8FN0 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 8S
U% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ;7rv // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", "!Lkp2\ nEndPos = " + nFileLength); p=gX!4,9< // fileSplitterFetch[nPos.length-1].start(); <1@
(ioPH -BhTkoN) v0@)t&O //等待子线程结束 U7H9/<&o //int count = 0; };S0 G! //是否结束while循环 'fY9a(Xt. boolean breakWhile = false; u^4h&fL #I%s3 Dp!zk}f| while(!bStop) yA;W/I4 { #H5=a6E+q write_nPos(); g`?:=G:a* Utility.sleep(500); *H2]H@QHN breakWhile = true; Gi7RMql6Q W3JF5* YYUe)j{T for(int i=0;i<nStartPos.length;i++) {p/YCch, { >Ko[Xb-8^_ if(!fileSplitterFetch.bDownOver) ycX{NDGs { Z[ZDQ o1 breakWhile = false; |4C^$ break; m,tXE%l } 9UD
@MA } |_zO_F rtp if(breakWhile) v?j!&d> break; ~UPZ< 5Op_*N{V s<7XxQ //count++; w~+ aW(2 //if(count>4) LP<<'(l` // siteStop(); wahZK~,EaY } ~F[L4y!sL !7 _\P7M IZNOWX|Z; System.err.println("文件下载结束!"); Pil;/t)" } G[z
.&l catch(Exception e){e.printStackTrace ();} F
?=9eISLJ } Y25uU%6t_ d2jr8U (tCib 4 //获得文件长度 JN[0L: public long getFileSize() srmKaa| { PT_KXk int nFileLength = -1; ^v:Z o try{ Y(VO.fVJK URL url = new URL(siteInfoBean.getSSiteURL()); C`K^L=8`{ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); vsMmCd)7U httpConnection.setRequestProperty("User-Agent","NetFox"); 7%d8D>uw8 o"q+,"QL +^ yq;z int responseCode=httpConnection.getResponseCode(); V|FrN*m if(responseCode>=400) Oh; Jw { G|4^_`- processErrorCode(responseCode); .SS<MDcqIt return -2; //-2 represent access is error Yl({)qK{ } z2 hFn& .<&s%{EW YpmYxd^ String sHeader; }Dfwm)]Q A
Y9
9!p o0I9M?lP for(int i=1;;i++) ?IW_O~Js { xeA#u
J //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); j]5WK_~M //Utility.log(in.readLine()); WUoOGbA ` sHeader=httpConnection.getHeaderFieldKey(i); H lB]38 if(sHeader!=null) D"l+iVbBP { b"CAKl if(sHeader.equals("Content-Length")) ;L"!I3dM) { YT-=;uK^S nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ")UwkF break; X?Pl<l& } -$-8W } w1^QD^KnH else -Zc![cAlO break; !m y8AWO' } fZN><3MO> } J"CJYuGW, catch(IOException e){e.printStackTrace ();} C/@LZ OEL catch(Exception e){e.printStackTrace ();} ?J!3j{4e k*Nr!Z!} >fs2kha Utility.log(nFileLength); ukAKFc^)k (-^bj vmZ"o9-{#X return nFileLength; !iu5OX7K| } dl|gG9u4Q VLvS$0(}Z `!4,jd //保存下载信息(文件指针位置) :0~QRc-u private void write_nPos() u=NG6G { *dsX#Iz
try{ AHbZQulC output = new DataOutputStream(new FileOutputStream(tmpFile)); _eQ-`? output.writeInt(nStartPos.length); D d $qQ for(int i=0;i<nStartPos.length;i++) )e%}b-I'r { &"E
lm // output.writeLong(nPos); KtN&,C )lJ output.writeLong(fileSplitterFetch.nStartPos); NC"yDWnO' output.writeLong(fileSplitterFetch.nEndPos); i!H!;z# } L'A)6^d@S output.close(); <iLM{@lZvJ } HEF?mD3h catch(IOException e){e.printStackTrace ();} .qD@
Y3- catch(Exception e){e.printStackTrace ();} /DFV$+9 } `wz[='yM 6[ga$nF? p~jlx~1-] //读取保存的下载信息(文件指针位置) g.DLfwI| private void read_nPos() a:Q[gF8> { q!lP"J try{ p.K*UP DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); wa09$4>_w int nCount = input.readInt(); vT{ kL nStartPos = new long[nCount]; 7}o/: nEndPos = new long[nCount]; c0- ;VZ' for(int i=0;i<nStartPos.length;i++) _ -..~K.| { C"V%# K nStartPos = input.readLong(); nHOr AD|& nEndPos = input.readLong(); PX
O!t]* } a:rX9-** input.close(); @tT-JwU } Djt%r< catch(IOException e){e.printStackTrace ();} )0 Z! n catch(Exception e){e.printStackTrace ();} Ty4S~ClO#' } i775:j~zx0 4vZ4/#(x 2)0b2QbQ private void processErrorCode(int nErrorCode) vp)Vb^K> { vDj;>VE2b System.err.println("Error Code : " + nErrorCode); E#%}ZY } @4+#Xd7" :py\| B|Wk?w.{r\ //停止文件下载 z}4L=KR\v public void siteStop() "jg@w%~ { rxZi8w>} bStop = true; T2'RATfG for(int i=0;i<nStartPos.length;i++)
m]Y;c_DO: fileSplitterFetch.splitterStop(); ht97s
U]6&b \}*k)$r } A$/\1282 } $hrIO+ //负责部分文件的抓取 }M>rE **FileSplitterFetch.java )q~DTR^z- */ eTay>G package NetFox; sp9W?IJ 6c VRng=, X*eW#|$\ import java.io.*; .giz=*q+ import java.net.*; P1>AOH2yG q1VH5'p@ ]2SF9p_ public class FileSplitterFetch extends Thread { N#xG3zZl|N TYns~X_PR NaUr!s String sURL; //File URL kyw/LE3$- long nStartPos; //File Snippet Start Position d=* x#In long nEndPos; //File Snippet End Position !vD{Df> int nThreadID; //Thread's ID G%lu28}D boolean bDownOver = false; //Downing is over El2e~l9 boolean bStop = false; //Stop identical i{c@S:&@^ FileAccessI fileAccessI = null; //File Access interface TX8<J>x l{c]p- &K+0xnUH public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException csZc|kDI { xJ8%<RR!t this.sURL = sURL; q%YV$$c this.nStartPos = nStart; KDP H6 this.nEndPos = nEnd; yCz|{=7"j nThreadID = id; ~ Hy,7 fileAccessI = new FileAccessI(sName,nStartPos);//定位 :nY2O }
G bP!9I [/M^[p H].y w9 public void run() uGN^!NG-0 { m}
?rJ while(nStartPos < nEndPos && !bStop) \00DqL(Oj` { ef! XV7P aolN<u3G R<ND=[}s try{ %(/!ljh_ URL url = new URL(sURL); @F*wg HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
kzmQm httpConnection.setRequestProperty("User-Agent","NetFox"); 'J)2g"T@ String sProperty = "bytes="+nStartPos+"-"; VhGs/5 httpConnection.setRequestProperty("RANGE",sProperty); T'-FV Utility.log(sProperty); +k<w!B*
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G.EFK d5 Edu44 InputStream input = httpConnection.getInputStream(); 5+Mdh` //logResponseHead(httpConnection); zLw{ {| :wqC8&V #:x4DvDkR byte[] b = new byte[1024]; G$zL)R8GE| int nRead; _?voU while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 1k%k`[VC { %6%<?jZ nStartPos += fileAccessI.write(b,0,nRead); -D^A:}$ //if(nThreadID == 1) j9+I0>#X // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Lw7=+h) } 9Mp$8-=>7 qB]i6* FbnO/! $8 Utility.log("Thread " + nThreadID + " is over!"); 6(|d|Si *c bDownOver = true; Mp$@`8X` //nPos = fileAccessI.write (b,0,nRead); ma$Prd } <AlZ]~Yct catch(Exception e){e.printStackTrace ();} yqXH:757~ } YNrp}KQ } y)c5u%( 2 !"
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If} //打印回应的头信息 I:V0Xxz5t public void logResponseHead(HttpURLConnection con) dBV7Te4L { \qvaE+ for(int i=1;;i++) )QagS.L{z { m4E)qCvy String header=con.getHeaderFieldKey(i); }{ 9&:!uA if(header!=null) 1=7jz]t //responseHeaders.put(header,httpConnection.getHeaderField(header)); V(MFna) Utility.log(header+" : "+con.getHeaderField(header)); s#Jh -+lM else :4S%'d7 break; 7`IpBm< } I
V%VU } e6B{QP#jq >>Ts?? vzel# public void splitterStop() Cd79 tu| { g[>\4B9t bStop = true; t%zpNd2lk } $uui:wU%Q K-<^$VWh +(D$9{y } f=!PllxL: UX<Qcjm$e pu!d qF< /* `u!l3VZ/4 **FileAccess.java @UBjq%z *//文件访问(定位,写) b?4/#&z] package NetFox; qQi.?<d2"s import java.io.*; o[ENp'r Ed0I WPx ?T_3n: public class FileAccessI implements Serializable{ z)XRx:YU;$ Dlo xrdOY& //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 B()/.w?A RandomAccessFile oSavedFile; &~UJf4b|A long nPos; 8;y&Pb~)
o47r<>t "x941} public FileAccessI() throws IOException cw&Hgjj2
{ y~
G.V,0 this("",0); 6~#Ih)K } E|YdcS {
74mf'IW 6OiSK@<Hk public FileAccessI(String sName,long nPos) throws IOException Iu~\L0R427 { FLoNE>q oSavedFile = new RandomAccessFile(sName,"rw"); 4$/i%B#ad this.nPos = nPos; 2RF^s.W oSavedFile.seek(nPos); e&MC|US=\ } }7{t^>;D H4OhIxK SxyONp.$\ public synchronized int write(byte[] b,int nStart,int nLen) a"/#+=[ { IfO;S*Qt int n = -1; ^ yh'lh/ try{ xX0-]Y h: oSavedFile.write(b,nStart,nLen); 2;L|y._`w n = nLen; ?::NO Dg } D2YZ9e
catch(IOException e) oIGrA-T} { V&soN:HS e.printStackTrace (); !KKT[28v } p3ISWJa! M >:]lpRK Sj'ht= return n; Lf:uNl*D } RjJU4q lcON+j Nf+b"&Zh` } dAP|:&y@ @=w<B4L g#NZ ,~ /* 2:}fe} **SiteInfoBean.java NT%W;)6m9 */ ;E~4)^ package NetFox; i$^)UZJ&0 "HD+rmUEH xy+QbDT public class SiteInfoBean { /Y[~-Y+!, E{=2\Wkcp GwsY-jf private String sSiteURL; //Site's URL qP!eJ6[Nh" private String sFilePath; //Saved File's Path D+ V7hpH- private String sFileName; //Saved File's Name z^o 1GY private int nSplitter; //Count of Splited Downloading File KDi|( 0YH+B R8*Q$rH< public SiteInfoBean() p6EDQwlf {//nSplitter的缺省值为5 AJt!!crs //default value of nSplitter is 5 nU+tM~C%a this("","","",5); QH4wUU3X } Z>F^C}8f puSLqouTM t<uYM public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) (VvKGh { 50jOA#l[ sSiteURL= sURL; +y[@T6_ sFilePath = sPath; #gQF' sFileName = sName; Xog/O i this.nSplitter = nSpiltter; @e~]t}fH 5yh/0i5 | Hx^!:kxk } >1L=,M ~Y=@$!Uq y#ON|c
/ public String getSSiteURL() !yjo { |ifHSc.j< return sSiteURL; WV;=@v } '/0#lF Qz<d~N m:tiY
[c>W public void setSSiteURL(String value) '6Qy /R { pvWau1ArNq sSiteURL = value; v=YK8fNi } 5`^o1nGO' tury<*
a<XCNTaVT public String getSFilePath() v|Jlf$> { B,$l4m4 return sFilePath; \v@({nB8 } PsjbR BJjx|VA+ 4FeEGySow public void setSFilePath(String value) .r|*Ch#;P { 2H#N{>7 sFilePath = value; AH7L.L+$M } D _X8- A Ayv Zp`T public String getSFileName() ~d>%,?zz { A(6xg)_XQ return sFileName; `hh9"Ws% } 4|J[Jdj ?v]-^X=& aA*9, public void setSFileName(String value) O>r-]0DI[ { ]o.vB}WsY sFileName = value; S*W;%J5 } GrEs1M1]* eBB:~,C^q. *3{J#Q6fk3 public int getNSplitter() -<f/\U { kN9yO5h7 return nSplitter; sLh0&R7 } "Tbnxx]J 7|YrdK< e29y7:)c= public void setNSplitter(int nCount) oN2=DYC41 { z MdC nSplitter = nCount; I=dGq;Jaz } $%qg" } gtU1'p" ^[# &
^[-V Z[#IfbYt /* 3P=w =~e **Utility.java ksI>IW */ lglYJ, package NetFox; ~uaP$*B[ -zfoRU v _vYzF+ public class Utility { CMVS W6 r2eQ{u{nX Ek .3 public Utility() UVX"fZ) { "n?<2
wso 8OAg~mQ15( 5{l1A(b } : }?{@#Z v[#)GB
_5 //线程睡眠 1kFjas`g public static void sleep(int nSecond) c~tAvDX { R{3CW^1 try{ vA?_-. J Thread.sleep(nSecond); j7/(sf } f'{>AKi=C catch(Exception e) LHi6:G"Y( { n(&*kfk e.printStackTrace (); DX@}!6|T } 31XU7A } Npa-$N&P{S 0n5UKtB //日志 DP>mNE public static void log(String sMsg) f=ib9WbR# { &'O?es|Lb System.err.println(sMsg); h~ha } YNM\pX' 9~Xg#{ XZO<dhZX: public static void log(int sMsg) D@hmO]5c { < l[`"0 System.err.println(sMsg); {wu!6\:<?? } t<lyg0f } Zr"dOj$Jf s/S+ ec3 TN ci.'] /* bOXh|u_3i **TestMethod.java iEhDaC[e(b */ 2u&c
&G package NetFox; )6G+ tU' Mf7E72{D 4TJ!jDkox public class TestMethod { liG~y|
rk|a'& h544dNo& public TestMethod() ~~dfpW _" { ///xx/weblogic60b2_win.exe 6DZ2pT: try{ nDn{zea7 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); t^$Div_%G //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); M=Is9)y SiteFileFetch fileFetch = new SiteFileFetch(bean); }2xb&6g~o fileFetch.start(); )`RZkCe } gT7I9 (x!W catch(Exception e){e.printStackTrace ();} R7t
bxC Bcm=G"" <Am^z~[ } /2'c> _^3@PM> ]eL~L_[G\ public static void main(String[] args) ^ N_`^m { k7[)g]u new TestMethod(); s @3zx } JgZdS-~ } fa.f(c 点击下载更多相关资料
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