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/* l9KLP **SiteFileFetch.java #"-?+F=rk */ W^npzgDCo package NetFox; "X0"=1R~ import java.io.*; w
F6ywr import java.net.*; g\S@@0T{0 4)0 %^\p XI:8_F;Q public class SiteFileFetch extends Thread { Z:DEET!c'k yI/2 e [ 9pUvw_9MY SiteInfoBean siteInfoBean = null; //文件信息Bean _G%]d$2f` long[] nStartPos; //开始位置 wgfA\7Z long[] nEndPos; //结束位置 59mNb:< FileSplitterFetch[] fileSplitterFetch; //子线程对象 Lh3>xZy"-z long nFileLength; //文件长度 xFxl9oM." boolean bFirst = true; //是否第一次取文件 1{l18B` boolean bStop = false; //停止标志 OzY55 File tmpFile; //文件下载的临时信息 q9cmtZrm DataOutputStream output; //输出到文件的输出流 t\~lGG-p ie|I*;# //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) RapHE; < public SiteFileFetch(SiteInfoBean bean) throws IOException i; Cs,Esnf { L1=3_fO siteInfoBean = bean; L08>9tf` //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Y$xO&\&) tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); jy@vz,/:%5 if(tmpFile.exists ()) D`p&`]k3v { ?~~sOf AP bFirst = false; !<r+h,C read_nPos(); hoY.2 B _ } >dKK [E/[d else b ~DtaGh { [
[]'U' nStartPos = new long[bean.getNSplitter()]; 0^'A^ nEndPos = new long[bean.getNSplitter()]; 5tPBTS<<"L } K$OxeJP?F -c-af%xD . K`OEdr< wKF #8Y } -
s[=$pDU piYv}4;:( pRI<L' public void run() qu]ch&"?U { b`"E(S / //获得文件长度 Ci%u =%( //分割文件 o?nlnoe //实例FileSplitterFetch M|!^ #!a( //启动FileSplitterFetch线程 kk]f*[Zi5 //等待子线程返回 gXr"],OM; try{ @3`:aWda if(bFirst) Y `4AML { 1'ne[@i^/ nFileLength = getFileSize(); sX&.8 if(nFileLength == -1) 0dS}pd">k { .5Y%I;~v System.err.println("File Length is not known!"); EvZ;i^.8LS } *hVbjI$ else if(nFileLength == -2) GC?X>AC: { I9O9V[ System.err.println("File is not access!"); V3;4,^=6Dd } s( @w1tS. else &8'.Gwm} { %Q]u_0P* for(int i=0;i<nStartPos.length;i++) lfjY45= { XL[/)lX{ nStartPos = (long)(i*(nFileLength/nStartPos.length)); (vte8uQe } bqugo for(int i=0;i<nEndPos.length-1;i++) s2Gi4fY? { UeWEncN( nEndPos = nStartPos[i+1]; 1I({2@C } G| 7\[!R nEndPos[nEndPos.length-1] = nFileLength; a<X8l^Ln } blxAy } .G[y^w)w} o(xRq;i #_yQv? J //启动子线程 rfqw/o fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; xdWfrm$;ZA for(int i=0;i<nStartPos.length;i++) ^NJ]~h{n$ { Zgp]s+%E fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [6x-c;H_4 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 0_yE74i nStartPos,nEndPos,i); F#=XJYG1 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); t~pA2?9@ fileSplitterFetch.start(); {MmHR } `@GqD // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >cwyb9;!kK siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Z09FW>"u // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", K/RQ-xd4 nEndPos = " + nFileLength); H5t 9Mg| // fileSplitterFetch[nPos.length-1].start(); (H *-b4]/ "8K>Yu17 R'a%_sACj> //等待子线程结束 wu?ahNb.`Y //int count = 0; H
<CsB //是否结束while循环 @rs(`4QEh boolean breakWhile = false; ZJ(/cD Z=%+U _, ?f v?6r while(!bStop) qGMM3a)Q { ';`fMcN write_nPos(); Ke-Q>sm2Q Utility.sleep(500); M0!;{1 breakWhile = true; +3.Ik,Z}zq $iQ>c6 \~xI#S@ for(int i=0;i<nStartPos.length;i++) kg[u@LgvoN { Ke[doQ#c if(!fileSplitterFetch.bDownOver) .(o]d{ '-} { Li ,B, breakWhile = false; E_&Hje|J_[ break; ".L+gn}u- } 9fD4xkRS } OJE<2:K if(breakWhile) :PtpIVAosg break; QFoZv+| n<MMO=+bg XfA3Ez,} //count++; zM6yUEg //if(count>4) 3_=~7B)
8 // siteStop();
{ZFa
+ } WtI1h `Fo H3{x;{.b :QgC Zq System.err.println("文件下载结束!"); GZT}aMMSJ } \C.%S +u catch(Exception e){e.printStackTrace ();} 1A^iUC5) } i}
96,{ P8NKpO\ >JT{~SRB|Y //获得文件长度 U`q[5U" public long getFileSize() ^B@4 w\t { zjgK78!< int nFileLength = -1; gd<8RVA try{ oTZ?x}Z1 URL url = new URL(siteInfoBean.getSSiteURL()); Sp)KtMV HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); SCeZt [
httpConnection.setRequestProperty("User-Agent","NetFox"); 6QdNGpN O%v(~&OSl 9[DQ[bL int responseCode=httpConnection.getResponseCode(); nPq\J~M if(responseCode>=400) ~\dpD { >_M}l@1 processErrorCode(responseCode); >V(>2eD'S return -2; //-2 represent access is error .jMm-vox} } mFayU w ]i*q*]x2u @_YEK3l]l String sHeader; zF/}s_><* [i[G" %Q vZ
4Z+;. for(int i=1;;i++) Y~1}B_ { jIE>t5 fy //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); kFv\V //Utility.log(in.readLine()); 7UHqiA`L sHeader=httpConnection.getHeaderFieldKey(i); ?97MW a if(sHeader!=null) DGY#pnCu { yb/<
7 if(sHeader.equals("Content-Length")) W9 y8dw. { Orh5d7+S nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); uZZ[`PA( break; QxnP+U~N } 3DK^S2\zBm } (Wr;:3i else Y^LFJB|b4 break; 8DTk<5mW~ } ;]fpdu{ } `.aL>hf catch(IOException e){e.printStackTrace ();} F$r8hj` catch(Exception e){e.printStackTrace ();} 567ot|cc 5!#"8|oY el!Bi>b9c! Utility.log(nFileLength); w|WZEu:0| A`(p6 H"s V$
38 return nFileLength; *wt yyP@
} qh$D;t1= {#QFDA 2`5(XpYe //保存下载信息(文件指针位置) 7tAWPSwf private void write_nPos() *"
<tFQ { {N5g52MN try{ N=D
Ynz_~ output = new DataOutputStream(new FileOutputStream(tmpFile)); .u7d output.writeInt(nStartPos.length); S
!c/"~X+ for(int i=0;i<nStartPos.length;i++) d!8q+FI { 1ISA^< M // output.writeLong(nPos); Qm`f5-d output.writeLong(fileSplitterFetch.nStartPos); uW>AH@Pij output.writeLong(fileSplitterFetch.nEndPos); M0Z>$Az]t } _WK+BxH output.close(); QZ{&7mc> } NJqALm!( catch(IOException e){e.printStackTrace ();} (m;P,* catch(Exception e){e.printStackTrace ();} ! qrF=a } 4NR,"l) miS+MK" {J})f>x<xM //读取保存的下载信息(文件指针位置) %>I!mD"X\ private void read_nPos() !P@u4FCs { QX%m4K/a try{ n_Um)GI> DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); TG?;o/ int nCount = input.readInt(); ?P`wLS^; nStartPos = new long[nCount]; 5[l3]HOO nEndPos = new long[nCount]; 0O-p(L= for(int i=0;i<nStartPos.length;i++) 9Z*` { { R5]R
pW=G nStartPos = input.readLong(); %h|z) nEndPos = input.readLong(); #PXl*~PrQ/ } )2S0OY. input.close(); s+zb[3} } 7]e]Y>wZap catch(IOException e){e.printStackTrace ();} 6 /4OFvL1 catch(Exception e){e.printStackTrace ();} w41#?VC/ } hph 3kfR Jq6p5jr" W[^XG\ private void processErrorCode(int nErrorCode) ac+7D:X { +Yi=Wo/ System.err.println("Error Code : " + nErrorCode); oeIB1DaI } XQj`KUO@ 5\|[)~b DP;B*s4{U //停止文件下载 \!cqeg*53 public void siteStop() 8.-PQ { *<9 D] bStop = true; I$f:K]|.m! for(int i=0;i<nStartPos.length;i++) Fi5,y;]R fileSplitterFetch.splitterStop(); Ce 5
}+A} K:'pK1zy FC]? T } *3"C"4S } 9HTb //负责部分文件的抓取 00;=6q]TA **FileSplitterFetch.java uU5:,Wy+dg */ &<_sXHg<x package NetFox; ][G<CO`k -D!F|&$ I*lq0& import java.io.*; boN)C?"^h import java.net.*; *[.\S3K` 6Ir
?@O1'! T$}<So| public class FileSplitterFetch extends Thread { 42m`7uQ 8 6L&u:o: h)y"?Jj String sURL; //File URL :hMuxHr long nStartPos; //File Snippet Start Position / _}v|E0 long nEndPos; //File Snippet End Position H>M%5bj int nThreadID; //Thread's ID (^Nf;E boolean bDownOver = false; //Downing is over &q":o 'q boolean bStop = false; //Stop identical d+&V^qLJ FileAccessI fileAccessI = null; //File Access interface (5yg\3Jvp "sg$[)I3n i}wu+<Mk public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException hJd#Gc~*M { :nwcO3~` this.sURL = sURL; G uDus2#+ this.nStartPos = nStart; +,|-4U@dl this.nEndPos = nEnd; Rb9Z{Clq> nThreadID = id; aaaC8;. fileAccessI = new FileAccessI(sName,nStartPos);//定位 3[V|C=u0 } 3Ji,n;QLm *f4KmiQ~% M/1Q/;0P public void run() 4&y_+ { L\-T[w),z7 while(nStartPos < nEndPos && !bStop) q>Q|:g&: { siD Sm &0>{mq}p,: e9%6+9Y try{ K/%aoTO} URL url = new URL(sURL); QGshc HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Upv2s:wa}z httpConnection.setRequestProperty("User-Agent","NetFox"); C62<pLJf String sProperty = "bytes="+nStartPos+"-"; .Zwn{SMtu httpConnection.setRequestProperty("RANGE",sProperty); Np/[MC Utility.log(sProperty); iOJgZuP }VFSF/\^ c89RuI `B~ InputStream input = httpConnection.getInputStream(); Hy `r}+ //logResponseHead(httpConnection); @EZXPU g` h>:5] MI@ RdXkY byte[] b = new byte[1024]; zM@iG]?kc int nRead; o_5|L9 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 0\h2& { Ft>ixn nStartPos += fileAccessI.write(b,0,nRead); R#T6Ii //if(nThreadID == 1) RuXK` ySv // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); CLYcg$V } nEGku]pCH{ lZ.,"F@ Q`//HOM, Utility.log("Thread " + nThreadID + " is over!"); G)e 20Mst bDownOver = true; k~q[qKb8y: //nPos = fileAccessI.write (b,0,nRead); [j![R } <v2R6cj5 catch(Exception e){e.printStackTrace ();} \\/X+4|o' } -_314j=`/ } +QHhAA$ u{3KV6MS #Kh`ATme //打印回应的头信息 ntF(K/~Y public void logResponseHead(HttpURLConnection con) GB
!3Z { "^trHh8= for(int i=1;;i++) ~z
aV.3# { ~P/G^cV3s String header=con.getHeaderFieldKey(i); L9kSeBt if(header!=null) b#y}VY)? //responseHeaders.put(header,httpConnection.getHeaderField(header)); QWxQD'L' Utility.log(header+" : "+con.getHeaderField(header)); k[zf`x^ else CY7REF break; v(t&8)Uu } 3;M!]9ms } 3 $kZu &G"]v]V XSxya.1 public void splitterStop() 3(}?f { A5/h*`Q\\ bStop = true; t)m4"p7 } 8ziYav %idnm $jzk4V } u(~s$ENl ,J~1~fg89 ]':C~-RV{ /* (%r:PcGMEV **FileAccess.java u3<])}I' *//文件访问(定位,写) WkO . package NetFox; I3L1|! import java.io.*; x[?_F wXZ-%,R-D Th8Q~*v public class FileAccessI implements Serializable{ S4(IYnwN S_QDYnF)` //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 t^[{8,N RandomAccessFile oSavedFile; I&vB\A long nPos; ~kHir]jc ;zOZu~Q|' Qz<-xe`o8] public FileAccessI() throws IOException Hc+<(g { S2NsqHJr this("",0); bHMlh^{`% } fSP~~YSeU ]I]dwi_g) _<~05Eh public FileAccessI(String sName,long nPos) throws IOException '0=U+Egp { 4 '+)9&g oSavedFile = new RandomAccessFile(sName,"rw"); ~W#f,mf this.nPos = nPos; $K iMu oSavedFile.seek(nPos); kQb0pfYs } 4v!@9.!vQ 6JL
7ut |-R::gm public synchronized int write(byte[] b,int nStart,int nLen) f>'7~69 { =?2y
<B int n = -1; c]LH. try{ u)V*o oSavedFile.write(b,nStart,nLen); PQ[TTLG\& n = nLen; K4rr.f6 } t.zSJ|T_&O catch(IOException e) z6!X+`& { 'l}3Iua6qk e.printStackTrace (); vIRE vj#U } m=K XMX mA."*)8VNg @Yg7F>s return n; ::R^ w" } a}
/Vu" jn7}jWA $-y+97 } Uyh ^U =`Rx !Q#b4 f /* l:ED_env: **SiteInfoBean.java _5)#{o< */ M{S7ia"s package NetFox; 0{,zE s%:fB( 5[3hw4 public class SiteInfoBean { GW W@8GNI 4 hj2rK'y VgdkCdWRm_ private String sSiteURL; //Site's URL Q(sbClp" private String sFilePath; //Saved File's Path ;L[9[uQ[C private String sFileName; //Saved File's Name
Ntqc=z private int nSplitter; //Count of Splited Downloading File I45A$nV#Q {)[i\=,`{ BOWTH{KR<< public SiteInfoBean() ^DH*@M {//nSplitter的缺省值为5 sH]AB=_ //default value of nSplitter is 5 *HC8kD a%$ this("","","",5); </%H 'V@ } ?
vlGr5# 9t[278B6 WNx^Rg"
>' public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ZChY:I$< { e!8_3BE sSiteURL= sURL; R*y[/Aw sFilePath = sPath; .~8+s.y sFileName = sName; :+5afv} this.nSplitter = nSpiltter; gv,T<A?Z2 <\8 =oTYwU } U&5zs r W
wE)XE WU4i-@Bm8 public String getSSiteURL() sHuz10 { V588Leb? return sSiteURL; qh'BrYu* } GlZ9k-ZRF [E^X=+Jnz g-^m\>B public void setSSiteURL(String value) oD7H6\_ { oL@ou{iQ sSiteURL = value; -7$'* V9$ } {q)B@#p JXAyF6
$ zJ:r0Bt public String getSFilePath() &>jkfG { C{Ug ?hVP return sFilePath; U{_s1 } 7`/qL " rrWk&;? L8zqLDi& public void setSFilePath(String value) a7|&Tbv { ;40m goN sFilePath = value; <f6PULm } J){\h-4 ZX;k*OrW }^ <zVdwp public String getSFileName() FNM"!z { _PbfFY # return sFileName; Mh|`XO.5I } w3N%J>4_E DRoxw24 iq:[+ public void setSFileName(String value) 48Lmy<}* { O-5U|wA sFileName = value; hyKg=Foq } Zsogx}i- w2+]C&B* #}(Df& public int getNSplitter() |w2AB7EU { }#x3IE6' return nSplitter; 55LF } 1hyah.i]Y Q/n.T0Z^ I
6YT|R public void setNSplitter(int nCount) Bqi2n'^O2 { *`-29eR"8 nSplitter = nCount; zjS:;!8em } cmU+VZ#pk } h3EDN:FQ 1$VI\} E@6r{uZ# /* $tHwJ!<$& **Utility.java &U*J{OP| */ !O6Is'%B package NetFox; ls\E%d 6a7iLQA {l&2Kd* public class Utility { %QgAilj, |a$w;s>\ Z{4aGp* public Utility() AdW2o|Uap { rOHW TQd FC\@f" FqxOHovE } 1GE%5 nj0AO0 //线程睡眠 k3[h'.ps public static void sleep(int nSecond) 6xIYg ^ { _`{{39 F try{ 5b`xN!c Thread.sleep(nSecond); 25c!-.5D } .0E4c8R\X catch(Exception e) by]|O { <lmJa# e.printStackTrace (); OG+r|.N; } CPNN!%- } v6-~fcX0G 'xZPIj+ //日志 K}<!{/fi) public static void log(String sMsg) ,."(Gp { nl9Cdi]o System.err.println(sMsg); :KP'xf. } B=bI'S8\ F2`htM@, '#i]SU&* public static void log(int sMsg) AOx3QgC^NO { FT/5 _1i System.err.println(sMsg); 9>&tMq } QcG5PV } EhPVK6@ .hlQ?\ Qy^z *s /* )cKtc **TestMethod.java /D$+b9FR< */ k?/ v y9 package NetFox; \*%i#]wO@ 9X$#x90 uWB:"&!^ public class TestMethod { T
E&Q6 vMX6Bg8 dHq )vs,L public TestMethod() e9`uD|KAS| { ///xx/weblogic60b2_win.exe wvmg)4, try{ #}!>iFBcH SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); r d6F"W //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); @> Ghfh>~D SiteFileFetch fileFetch = new SiteFileFetch(bean); &:;;u\ fileFetch.start(); f;Bfh3 } .eabtGO, catch(Exception e){e.printStackTrace ();} R=amKLD? 4-+ozC{ #A/]Vs$ } \l]pe|0EW 'y6!%k* {y&\?'L' public static void main(String[] args) a()6bRc~T { BgkB x new TestMethod(); {Bq"$M!Y } Oh/b?|imG } :q>oD-b$} 点击下载更多相关资料
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