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/* [^S(SPL **SiteFileFetch.java 6Lb(oY}\3 */ ~9 [O' package NetFox; Ht9QINo import java.io.*; *t%Z'IA import java.net.*; <%iRa$i5 yCvP-?2 S
T1V public class SiteFileFetch extends Thread { QHDR*tB:{ 6Lc{SR yt@7l]I SiteInfoBean siteInfoBean = null; //文件信息Bean cTJi8f=g long[] nStartPos; //开始位置 \5iMr[s long[] nEndPos; //结束位置 RH}i= FileSplitterFetch[] fileSplitterFetch; //子线程对象 mfqnRPZ long nFileLength; //文件长度 ;0vCZaEF boolean bFirst = true; //是否第一次取文件 L~+/LV boolean bStop = false; //停止标志 NHL9qL"qk File tmpFile; //文件下载的临时信息 hl]q6ZK!6 DataOutputStream output; //输出到文件的输出流 /wI"oHZd \'Q rJ ?D //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) CBr(a'3{Z public SiteFileFetch(SiteInfoBean bean) throws IOException 3%[;nhbA7 { 4=~+Bz siteInfoBean = bean; n
"bii7h //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); H[_i=X3-~ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); mPL0s if(tmpFile.exists ()) l+A)MJd oj { ;l %$-/% bFirst = false; ?Gl]O3@3 read_nPos(); TtQ'I}7q } ({OQ
JBC else 21$E.x 6 { ;=p3L<~c`K nStartPos = new long[bean.getNSplitter()]; = ;cTm5d;T nEndPos = new long[bean.getNSplitter()]; s(Bcw`'# } vc0LV'lmg uc>":V Uv m:`e~? ZXIw^!8@/ } _70Z1_; @V&c=8)8 FS)"MDs public void run() *
'_(.Z: { ;,}Dh/&E //获得文件长度 Z%Fc
-KVt //分割文件 5%%e$o+ //实例FileSplitterFetch 3_ly"\I\ //启动FileSplitterFetch线程 "ze-Mb //等待子线程返回 } J[Z)u try{ PU,%Y_xR if(bFirst) UCt}\IJ { /go|r ' nFileLength = getFileSize(); )qRH?Hsb7 if(nFileLength == -1) Vel}lQD { 16ZyLt System.err.println("File Length is not known!"); `Gj(>z* } dEZUK vo else if(nFileLength == -2) q{ [!" , { ]|-sZ<?<i System.err.println("File is not access!"); '451H3LC0 } b'W.l1]<- else
k^Q.lb
{ { Vu,e]@ for(int i=0;i<nStartPos.length;i++) .ht-* { E<jW;trt_ nStartPos = (long)(i*(nFileLength/nStartPos.length)); <2E|URo,# } _U_O0@xi for(int i=0;i<nEndPos.length-1;i++) !Ii[`H { hvG D` nEndPos = nStartPos[i+1]; 31~nay15 } 9Pb6Z} nEndPos[nEndPos.length-1] = nFileLength; Cz)&R^ } s+?2oPa } gBky ZK .g3=L &7i&"TNptP //启动子线程 %q}[ZD/HD fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; /w1M%10 for(int i=0;i<nStartPos.length;i++) E.Q]X]q { |AH>EXhv fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), :KgH7s} siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), DXo]O}VF nStartPos,nEndPos,i); S,j. ?u*! Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); f S[-K?K fileSplitterFetch.start(); &s(J:P$! } =W &Mt // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), V2!0),]B siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); !~&&&85 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", xeL"FzF:V nEndPos = " + nFileLength); kU+|QBA@ // fileSplitterFetch[nPos.length-1].start(); Zwm/ c]6` H %c6I lxm/*^
//等待子线程结束 j*5IRzK1%0 //int count = 0; cGiL9|k //是否结束while循环 5f{P% x( boolean breakWhile = false; :\vs kk), cT(6>@9@ R{fJ"Q5' while(!bStop) >MGWN { c}+*$DeT write_nPos(); u4_QLf@I Utility.sleep(500); M+0PEf. breakWhile = true; \nt~K}a +U1
Ir5Lx a%e` for(int i=0;i<nStartPos.length;i++) hbOXR.0z { Z4EmRa30 p if(!fileSplitterFetch.bDownOver) veHe
{ w`;HwK$ , breakWhile = false; =C2sl;7~* break; K Ax=C}9 } vjq2(I)u } )Xh}N if(breakWhile) o]~\u{o#. break; -?-XO<I h7E~I
J g"Y_!)X //count++; fO$){(]^ //if(count>4) ICb!AsL // siteStop(); v,S5C } 58Ce>*~ ov,|`FdU^T y-db CYMc System.err.println("文件下载结束!"); {$,\Qg } t|$jgM catch(Exception e){e.printStackTrace ();} (Kwqa"Hk4{ } ~g\~x aknIrblS\ &yvvea] //获得文件长度 \4L ur public long getFileSize() 0eNdKE { +bS\iw + int nFileLength = -1; <@<bX try{ ? Bpnnwx URL url = new URL(siteInfoBean.getSSiteURL()); ts!tv6@ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); .P$m?p# httpConnection.setRequestProperty("User-Agent","NetFox"); ]:Gy]qkO 4kjfYf@A ,\s`T O int responseCode=httpConnection.getResponseCode(); E=N$JM if(responseCode>=400) @QQ%09* { g#=<;X2 processErrorCode(responseCode); >I|8yqbfm return -2; //-2 represent access is error st;iGg } dMH_:jb GLn=*Dh# Tb$))O} String sHeader; 3)y1q>CQf 1o`1W4Q E ?Mgbd3 for(int i=1;;i++) rXi&8R[ { [zx|3wWAX- //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); J5G<Y*q //Utility.log(in.readLine()); '9zW#b sHeader=httpConnection.getHeaderFieldKey(i);
E.h if(sHeader!=null) 0&UG=q { PjeI&@ if(sHeader.equals("Content-Length")) TKR#YJQ?K { $<v4c5r]O nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); {^z73Gxt, break; 8YFG*HSa } taE
p } . vb##D else
6sBt6?_T break; m ol,iM*l } zr/v .$< } Y"H`+UV catch(IOException e){e.printStackTrace ();} 1zPS#K/3 catch(Exception e){e.printStackTrace ();} 8>9Mh!t}(I w.q`E@ T* hzsQK_;S Utility.log(nFileLength); 2iG+Ek-?" )X0=z1$ MY,~leP& return nFileLength; '4 *0Pw } <= o<lRU /_0B5,6R ?6CLUu|7n //保存下载信息(文件指针位置) "E\vdhk private void write_nPos() ,~Mf2Y#m0p { i1cd9 try{ 0vqVE]C output = new DataOutputStream(new FileOutputStream(tmpFile)); J\y^T3Z output.writeInt(nStartPos.length); mD'nF1o
Ly for(int i=0;i<nStartPos.length;i++) O>' }q/ { .;4N:*hY // output.writeLong(nPos); !T,<p
output.writeLong(fileSplitterFetch.nStartPos); x4I!f)8Q output.writeLong(fileSplitterFetch.nEndPos); tnJ7m8JmC } F9
r5 Z output.close(); h9QM
nH' } wH ,PA: catch(IOException e){e.printStackTrace ();} Pvc)-A catch(Exception e){e.printStackTrace ();} gD9CA* } !-lI<$S: N;3!oo4 z}[u~P, //读取保存的下载信息(文件指针位置) < o?ua} private void read_nPos() R!M' { @D;K&:~|N try{ \p(S4?I7 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); !, BJO3& int nCount = input.readInt(); _<(xjWp 8 nStartPos = new long[nCount]; 2 nyK'k nEndPos = new long[nCount]; 28"1ONs3 for(int i=0;i<nStartPos.length;i++) VZi1b0k1. { v
WXo# nStartPos = input.readLong(); th{f|fm62 nEndPos = input.readLong(); G3_7e A#; } tg\Nm7I input.close(); GrLxERf } lwQ!sH[M catch(IOException e){e.printStackTrace ();} zDdo RK@ catch(Exception e){e.printStackTrace ();} B~I ]3f } E{T3Xwg P8YnKyI,. LA6XTgcu private void processErrorCode(int nErrorCode) Yh1</C { 6]1RxrAV System.err.println("Error Code : " + nErrorCode); gX{j$]^6G8 } Q#% LIkeq !
v![K b$'%)\('g //停止文件下载 ^UvL1+ public void siteStop() ~!({Unt+' { 8WytvwB} bStop = true; c +]r for(int i=0;i<nStartPos.length;i++) I0F[Z\U fileSplitterFetch.splitterStop(); ~T@E")uR E<yQB39 e8`d<U } fz|*Plv } D9g*+KM& //负责部分文件的抓取 2!6hB sEr **FileSplitterFetch.java dEDhdF#f */ +PYV-@q package NetFox; /(~
HHN nh zu}uW,XH- Vx!ZF+ import java.io.*; < dE7+w import java.net.*;
ck;:84 1O Ft}>1 ~aotV1"D public class FileSplitterFetch extends Thread { #X)DFAtb RhJ 3>DL &3iI\s[ String sURL; //File URL \*MZ1Q*x long nStartPos; //File Snippet Start Position L"YQji! long nEndPos; //File Snippet End Position <W!T+sMQj int nThreadID; //Thread's ID \l=A2i7TQ boolean bDownOver = false; //Downing is over vVB WhY] boolean bStop = false; //Stop identical }!K
# FileAccessI fileAccessI = null; //File Access interface gX!K%qJBg '{,JuX"n H2],auBY public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException dU-:#QV6 { QHv]7&^rlj this.sURL = sURL; W
_[9 this.nStartPos = nStart; S8v,'Cc this.nEndPos = nEnd; ^X#)'\T nThreadID = id; Zdrniae
ah fileAccessI = new FileAccessI(sName,nStartPos);//定位 e[fld,s } -d?<t}a `&=%p| Wgf
f+7k public void run() 9vi+[3s/=; { :LuA6 while(nStartPos < nEndPos && !bStop) VN-0hw/A { 6U).vg< MZ)lNU l &kf \[|y try{ |3k r*# URL url = new URL(sURL); x6aVNH= HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); :2
\NG} httpConnection.setRequestProperty("User-Agent","NetFox"); G$)q% b;Lz String sProperty = "bytes="+nStartPos+"-"; HE*^!2f httpConnection.setRequestProperty("RANGE",sProperty); bv7)[,i Utility.log(sProperty); xz`0V}dPl g1XpERsSEV G9S3r3 InputStream input = httpConnection.getInputStream(); *[>{9V //logResponseHead(httpConnection); 0]ai*\,W7~ sfVzVS[ E.C=VfBW byte[] b = new byte[1024]; 1&h\\&ic int nRead; Uvk: while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) "wVisL2+. { t^bh2$J nStartPos += fileAccessI.write(b,0,nRead); iJZvVs', //if(nThreadID == 1) :"Vmy.xq // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); di;~$rI!? } E\2f"s % M_F/ O ybf,pDY#f Utility.log("Thread " + nThreadID + " is over!"); pvWNiW:~k bDownOver = true; ^!m%:r7Dr //nPos = fileAccessI.write (b,0,nRead); l(MjLXw5 } pl}W|kW} catch(Exception e){e.printStackTrace ();} Cf 202pF3y } B8wGWZ@ } 5-4 VaonG]Ues ;Zf7|i`R3 //打印回应的头信息 ./tZ*sP: public void logResponseHead(HttpURLConnection con) ga'G)d3oS { {#=o4~u%;H for(int i=1;;i++) . Z`xNp { U4"&T,'lTL String header=con.getHeaderFieldKey(i); )REegFN@ if(header!=null) /`qQWB5b //responseHeaders.put(header,httpConnection.getHeaderField(header)); ;Gu(Yoa}y Utility.log(header+" : "+con.getHeaderField(header)); "MPS&OK else =g%<xCp break; 8&hxU@T~ } AO-~dV } aEEb1Y P(\x. d: '0Q/oU public void splitterStop() sCf)#6mI { ow+_g R- bStop = true; &G-dxET] } $;";i:H` O*F= xG N+]HJ`K } 6 {`J I FrRUAoFO A(XX2f!i /* }Oe4wEYN) **FileAccess.java -g"Wi@Qr *//文件访问(定位,写) >N0L package NetFox; 1n)YCSA import java.io.*; Bi/E{k, Lm^vS u V2yX;u public class FileAccessI implements Serializable{ eOb)uIF zo
]-,u //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 V\c`O RandomAccessFile oSavedFile; IUG}Q7w5 long nPos; X2 <fS~m ;+3@S`2r /*6[Itm_h public FileAccessI() throws IOException L8pKVr { |*~SR.[` this("",0); (76tYt~I= } nGDY::nUE &`g^b^i H-%
B<7 public FileAccessI(String sName,long nPos) throws IOException WxJaE;`Ige { L 'e|D=y oSavedFile = new RandomAccessFile(sName,"rw"); Lq#!}QcW= this.nPos = nPos; 8yswi[ oSavedFile.seek(nPos); hBDmC_\~ } 7?y([i\y MbQ%'z6D S2
-J1x2N public synchronized int write(byte[] b,int nStart,int nLen) Q0XSQ Ol { nx!+:P , int n = -1; T#}"?A| try{ GG4FS oSavedFile.write(b,nStart,nLen); Jg&f. n = nLen; U*BI/wZ } $GD
Q1&Z catch(IOException e) u`*1OqU { 0\1g-kc!v e.printStackTrace (); S""F58H n } Gg^gK*D pe!"!xJE R$2\Xl@qQF return n; i66/2BUh. }
S O`b+B AgOti]`aR C)cuy7< } i2)$%M& +WCV"m L7yEgYB /* i@=(Y~tD` **SiteInfoBean.java Xk :_aJ */ a!&<jM package NetFox; 0|mCk BtF7P}:MGf `nd$6i^#W public class SiteInfoBean { s +0S,?{$ "Qk)EY .sZ"|j9m private String sSiteURL; //Site's URL Wm!cjGK private String sFilePath; //Saved File's Path ZQsVSz( 1 private String sFileName; //Saved File's Name Bl+PJ
0 private int nSplitter; //Count of Splited Downloading File m*14n_m' o#-^Lg& ^HWa owy= public SiteInfoBean() .p78
\T {//nSplitter的缺省值为5 4SIS#m //default value of nSplitter is 5 ^aqBL this("","","",5); q3u:Tpn4% } k P=~L=cK `cFNO: g9F?j public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) iG{xDj{CKv { #a 4X*X.8c sSiteURL= sURL; xeRoif\4c sFilePath = sPath; SM.KM_%K sFileName = sName; L}tP_ * this.nSplitter = nSpiltter; I9sQPa .bNG:y> =GC,1WVEqV } :f0#4'f ' $"RQ= rrs0|= public String getSSiteURL() pvdCiYo1r { 50Ov>(f@7 return sSiteURL; C|S~>4` } `>HrO}x^ kq>I?wg L1MG("R public void setSSiteURL(String value) 3#{Al[jq { 3
t+1M sSiteURL = value; V?n=yg } 7J|nqr`>t ]4,eCT z7HM/<WY public String getSFilePath() ugs9>`fF& { L1QDA}6?_Y return sFilePath; Eo0/cln| } ~6#O5plKc 1-sG`% O-n JuZJgX public void setSFilePath(String value) !{b4+!@p { G^le91$ sFilePath = value; ,-SWrp`f } \$xj>b; AK&=/[U> 6P02= public String getSFileName() PeJIa
%iE { !WTL:dk return sFileName; &&
b;Wr } :c9 H2 X?'pcYSL wT +\:y public void setSFileName(String value) rw[Ioyr- { n]jw!; sFileName = value; {n(/ c33 } IJD E{) >LW}N!IBy ~P'i
/*: public int getNSplitter() qTe@?j { M[QQi2:& return nSplitter; {=ATRwUL } (P-$tHt y N,grU( @iN"]GFjS public void setNSplitter(int nCount) HmbQL2 { $#E!/vVwD7 nSplitter = nCount; N{uVh;_ } plM:7#eA } ,OFNV|S$ yV*4|EkvW m"wP]OQH*+ /* 5 &0qr$ **Utility.java .Gb!mG */ Yw_!40` package NetFox; sGc.;": l_Zx'm ^ U~QQ public class Utility { gmZ] E45 \85~~v@ 664D5f#EJ public Utility() /|isRh| { \J(kM,ZJ s%1ZraMvJ *NC@o* } #@F.wV0 &_74h);2I: //线程睡眠 ~yJJ00% public static void sleep(int nSecond) w@LLxL>Y { :TkMS8 try{ e9>~mtx Thread.sleep(nSecond); `UTUrM } <(i5hmuVd catch(Exception e) ^,aI2vC { "<LWz&e^^ e.printStackTrace (); Zpz3?VM( } ilAhw4A } d0;?GQYn: V)P8w#, //日志 <,\U,jU_ public static void log(String sMsg) ^9kx3Pw?8 { 4eJR=h1 System.err.println(sMsg); L$,yEMCe } W||&Xb .eLd0{JtN mv^X{T public static void log(int sMsg) : [7O=[pk { o7@C$R_# System.err.println(sMsg); zjOOEvi } cQm4q19 } K~B =}.gU WV 'xEK0~awD /* IhOAMH1 **TestMethod.java ?:G 3U\M */ buT6)~lw package NetFox; _n_()at) AREjS$ s;$f6X public class TestMethod { `46z D
? +wf9!_' 5lM2nhlf'b public TestMethod() Xj~%kPe { ///xx/weblogic60b2_win.exe ~S\> F\v6' try{ ;#:AM; SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); -&=dl_m //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); );kD0FO1| SiteFileFetch fileFetch = new SiteFileFetch(bean); _*MK" fileFetch.start(); EX#AJ>?V( } ]Y!x7 catch(Exception e){e.printStackTrace ();} V:vqt@ !F.h+&^D; PcqS#!t } eTuKu(0
E [FLR&=.(
I Zw public static void main(String[] args) :q?#$? { e.~11bx new TestMethod(); "%\hDL; } 57-Hx; } 2TNK 点击下载更多相关资料
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