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/* tx ,q=.( **SiteFileFetch.java ^50\c$ */
AS/z1M_U package NetFox; g<g$c<sm import java.io.*; =+w!fy import java.net.*; (Q}ByX usR+ZQaA aI_[h
v public class SiteFileFetch extends Thread { "2z&9`VIY a7n`(}?Y 7[ZoUWx SiteInfoBean siteInfoBean = null; //文件信息Bean n.OsmCR N; long[] nStartPos; //开始位置 9NeHN@D) long[] nEndPos; //结束位置 Y@ X>ejk" FileSplitterFetch[] fileSplitterFetch; //子线程对象 )LTX.Kg long nFileLength; //文件长度 V)A7q9Bum boolean bFirst = true; //是否第一次取文件 xv~Sk2Z+d boolean bStop = false; //停止标志 /_1q)`NYy File tmpFile; //文件下载的临时信息 qFN`pe, DataOutputStream output; //输出到文件的输出流 {h0T_8L/ d9q`IZqee //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) !nL>Ly public SiteFileFetch(SiteInfoBean bean) throws IOException KpC!C9 { gubw&W siteInfoBean = bean; @ )Nw>/;o //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); `wKd##v'@ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Af Y]i if(tmpFile.exists ()) `APeS=<
& { G.]'pn bFirst = false; !3`X Gg read_nPos(); jx14/E+^ } qW`DCZu else $
D.*r*c6 { u4|)A4n nStartPos = new long[bean.getNSplitter()]; ^j7>Ul, nEndPos = new long[bean.getNSplitter()];
*JF7 B } `Gh J)WA< ?D;7ut$~ I(>j"H)cAF m
;yIFO } 3v~[kVhoG u4h.\ul8% =
( 4l public void run() Vp&"[rC_z { h?p!uQ //获得文件长度 {LBL8sG //分割文件 mC}
b>\ //实例FileSplitterFetch =
OzpI //启动FileSplitterFetch线程 r6vI6|1 //等待子线程返回 ~ DP5Qi try{ -+[~eqRB if(bFirst) >?[?W|k7V { '0v]?mM nFileLength = getFileSize(); BvP++,a&Sa if(nFileLength == -1) -?w3j9kk> { YRQ?:a{H System.err.println("File Length is not known!"); z}F^HQ1 } 2TgS
) else if(nFileLength == -2) P"+R:O\!g { XZT|ID_u" System.err.println("File is not access!"); O Ke
9/._ } JqV}$E"M2 else ogqKM_ { :9f 9Z7M for(int i=0;i<nStartPos.length;i++) AjJ/t4< { hISYtNWjd" nStartPos = (long)(i*(nFileLength/nStartPos.length)); +2>, -V } .EZ8yJj1Q for(int i=0;i<nEndPos.length-1;i++) ssAGWP {
?(M$r\\ nEndPos = nStartPos[i+1]; baGV]=j } `jec|i@oO nEndPos[nEndPos.length-1] = nFileLength; .|0$?w } ^%O$7* } <Ok7-:OxA }U?:al/m =^z*p9ZB //启动子线程 *onVG5< fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; mbHMy[R for(int i=0;i<nStartPos.length;i++) g){gF( { f9t+x+ Z fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), I#;.;%u siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 3gYtu-1 nStartPos,nEndPos,i); <?h(Dchq Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ~:*V'/2k
fileSplitterFetch.start(); #vc!SI } MzF,is // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), F~/~_9RJ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); rpc;*t+z // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", F^&@[k7WW nEndPos = " + nFileLength); DABV}@ K" // fileSplitterFetch[nPos.length-1].start(); BwAmNW&i {vk%&{D0) N'0nt]&a //等待子线程结束 \H
5t-w= //int count = 0; 8 %p+:6kP5 //是否结束while循环 ),H1z`c&I boolean breakWhile = false; E:;MI{;7 ~MP/[,j` EqOhz II^ while(!bStop) &yI>A1 { zb s7G write_nPos(); VVfTFi< Utility.sleep(500); 9%2he)Yqc breakWhile = true; 92~$Qa\S! ZCA= n @2`nBtk for(int i=0;i<nStartPos.length;i++) n g9_c { Wu/:ES)C if(!fileSplitterFetch.bDownOver) u+c2
m { z\YLO%Mm breakWhile = false; Mm!;+bM% break; -s\R2_( } uQKo2B0 } QcX&q%*0 if(breakWhile) v1/Y0 break; /#SH`ZK 1GPBqF "LH3ZPD //count++; /S @iF //if(count>4) R
G~GVf // siteStop(); di7cCn } x6ayFq= 5Q: %f &da:{ System.err.println("文件下载结束!"); 7>F [7_ } .3#Xjhebvu catch(Exception e){e.printStackTrace ();} `aA)n;{/2u } %'VzN3Q5V J&B5Ll
I9xkqj //获得文件长度 ?!.J0q public long getFileSize() bdEIvf7 { lq a~ZF* int nFileLength = -1; !pHI`FeAV try{ "sWsK
% URL url = new URL(siteInfoBean.getSSiteURL()); /FjdcH= HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); G-,0mo httpConnection.setRequestProperty("User-Agent","NetFox"); TD78&a# jvpv1>KYV S,Q(,e^& int responseCode=httpConnection.getResponseCode(); `fl$ o6S/ if(responseCode>=400) 3Bcv"O,B!{ { A`"?~_pHC processErrorCode(responseCode); 4YoQ*NQw- return -2; //-2 represent access is error AUES;2WL } oE2VJKs<B 8L]Cc!~ :B\$7+$v String sHeader; (Ffa{Tt! 4~8-^^ TX7dwmt)N for(int i=1;;i++) sHPj_d# { s'OK])>` //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); EVE"F'Ww,_ //Utility.log(in.readLine()); (*,R21<% sHeader=httpConnection.getHeaderFieldKey(i); e_g&L) if(sHeader!=null) ux,eY { \rE] V,,2 if(sHeader.equals("Content-Length")) U#<{RqY { ?mN!9/DIc nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); yo%Nz" break; :^`WrcOJ } FYb]9MX } d[nz0LI|mk else U* uMMb}$ break; 1&vR7z]* } `wr*@/P } #%L_wJB- catch(IOException e){e.printStackTrace ();} ej1WkaR8
catch(Exception e){e.printStackTrace ();} B?Rkz s,l*=< BuUM~k&SY Utility.log(nFileLength); T0.sL9 e E(+ "z=~7g return nFileLength; t:xTmK&vt } 8 qZbsZi4 =k;X}/ OMd:#cWsQ //保存下载信息(文件指针位置) (+<66
TO private void write_nPos() MBnxF^c&P { /LtbmV try{ Sz]1`%_H/ output = new DataOutputStream(new FileOutputStream(tmpFile)); 4W<[& )7 output.writeInt(nStartPos.length); 7#X`D for(int i=0;i<nStartPos.length;i++) [Z&<# - { J)|I/8!# // output.writeLong(nPos); t:v>W8N53 output.writeLong(fileSplitterFetch.nStartPos); 2izBB,# " output.writeLong(fileSplitterFetch.nEndPos); 4ElS_u^cP7 } C~'.3Q6 output.close(); 'pO-h,{TS } [fELf(;( catch(IOException e){e.printStackTrace ();} V|*3*W catch(Exception e){e.printStackTrace ();} [57`V&c5 } UIU6rilB 8@|{n`n] >%slzr //读取保存的下载信息(文件指针位置) }o\} qu* private void read_nPos() 6Q{OM:L/;. { mS49l try{ HiD%BL>% DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); $BG]is,&5 int nCount = input.readInt(); 91DevizXx nStartPos = new long[nCount]; z46Sh&+ nEndPos = new long[nCount]; } :gi<#-:G for(int i=0;i<nStartPos.length;i++) =h+-1zp{M^ { =kz HZc nStartPos = input.readLong(); U-U(_W5& nEndPos = input.readLong(); kf#S"[/E } +ZFN8 input.close(); M&sQnPFH } NLUO{'uUW catch(IOException e){e.printStackTrace ();} P{Q$(rOe catch(Exception e){e.printStackTrace ();} *i!t&s } ] ;HCt=I~ J4
U]_| Hw62'% private void processErrorCode(int nErrorCode) dxH . { y(E<MRd8V System.err.println("Error Code : " + nErrorCode); Z|)1 ftcC } V
'fri/Z 8Z)wot NS;LFeGD //停止文件下载 bfpoX,: public void siteStop()
':DL { -.L )\ bStop = true; FIu^Qd for(int i=0;i<nStartPos.length;i++) a4Z e!l( fileSplitterFetch.splitterStop(); 2Uu!_n}tNF KuL+~ "|R75m,Id } ic l]H } =EU;%f //负责部分文件的抓取 zZey **FileSplitterFetch.java d#W^S[[ */ Lf%}\0: package NetFox; ,4B8?0sH| bQ&%6'ck pd.unEWwF import java.io.*; )h{+pK import java.net.*; kpNp}b8'] tZFpxyF
'Asr,[]? public class FileSplitterFetch extends Thread { 0F%?<:
& yL
-}E O`aNNy String sURL; //File URL \MPbG$ ^ long nStartPos; //File Snippet Start Position o`
dQ long nEndPos; //File Snippet End Position sI09X6) int nThreadID; //Thread's ID $Zkk14 boolean bDownOver = false; //Downing is over
bf2r8 boolean bStop = false; //Stop identical PzhC *" i} FileAccessI fileAccessI = null; //File Access interface ]v?jfy AS[j)x! C}DIm&)) public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 1TF S2R n { BHErc\ITP this.sURL = sURL; }OTJ{eG this.nStartPos = nStart; {wDe#c{_ this.nEndPos = nEnd; <Of-,PcCV nThreadID = id; v!$?;"d+ fileAccessI = new FileAccessI(sName,nStartPos);//定位 wM3m'# xJ } @Pi]kWW}) 2^w{Hcf .[3C public void run() Z%=A[`5] { 5w+&plIJ while(nStartPos < nEndPos && !bStop) c~OvoTF, { kLpq{GUv: PSX
o" nV`W0r(f' try{ _N>#/v)Yi URL url = new URL(sURL); @ `mke4>_ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >hV2p/D httpConnection.setRequestProperty("User-Agent","NetFox"); VWzuV&;P String sProperty = "bytes="+nStartPos+"-"; b):aqRwP httpConnection.setRequestProperty("RANGE",sProperty); ;18u02z^ Utility.log(sProperty); /E i e5p 9\=SG"e( ELG9ts+5Uj InputStream input = httpConnection.getInputStream(); G%=
gCR //logResponseHead(httpConnection); (hIo0. 9]1LwX!M2 *X}2 byte[] b = new byte[1024]; s#")hMJQ int nRead; D(&WEmm\B while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) F~bDg tN3 { Kc#1H|'2N nStartPos += fileAccessI.write(b,0,nRead); `R -?+76? //if(nThreadID == 1) U3 UA // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); '#.D`9YI< } tDfHO1pS 475g-t2"@ XD_!5+\H1 Utility.log("Thread " + nThreadID + " is over!"); h^''ue" bDownOver = true; W
)Ps2 //nPos = fileAccessI.write (b,0,nRead); i&DUlmt)f } Gi2Fjq/Y catch(Exception e){e.printStackTrace ();} *Tr{a_{~C } 8F's9c, } } j;es(~D mG0_&'"YIG m&be55M; //打印回应的头信息 3"k n5)x public void logResponseHead(HttpURLConnection con) 6K=}n] n { #uCfXJ- for(int i=1;;i++) % I2JS { gFfKK`)}D' String header=con.getHeaderFieldKey(i); \ Z5160 if(header!=null) peOoZdJd //responseHeaders.put(header,httpConnection.getHeaderField(header)); =A$d)& Utility.log(header+" : "+con.getHeaderField(header)); *19a\m=>oi else q9a6s{, break; sOS^ } DnW/q } &F Yv4J `~41>mM% &!M6{O=~ public void splitterStop() Rtl1eJ- { JeA_mtSQ| bStop = true; 036QV M$ } bqx2lQf,_ HEhBOER? )p:+!sX( } S;%k?O7v `9P`f4x b@K1;A! S /* }qZ^S9 **FileAccess.java P 6=5:-Hh *//文件访问(定位,写) ^),t=!;p package NetFox; YRd`G3J import java.io.*; >RpMw!NT k72NXagh -7%dgY( public class FileAccessI implements Serializable{ R|Uu r)Ml-r= //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 _u6MSRX[6$ RandomAccessFile oSavedFile; iU3PlF[B/o long nPos; RUVrX`u*( bUSa#pNO> W{j(=<|< public FileAccessI() throws IOException N%e^2O) { ]&P 4QT)f this("",0); *Ue#Sade } 2:e7'}\D. CteNJBm |Z+qaq{X public FileAccessI(String sName,long nPos) throws IOException Py/~Q-8p { 8=?U7aw oSavedFile = new RandomAccessFile(sName,"rw"); t3K9 |8< this.nPos = nPos; (*V!V3E3# oSavedFile.seek(nPos); Ap |g[J } (<}?}{YX0 L&uPNcZ`- _?$w8 S% public synchronized int write(byte[] b,int nStart,int nLen) =e9<.{]S/ { v!3Oq.ot int n = -1; F|o1r try{ NdXC8 oSavedFile.write(b,nStart,nLen); IH5^M74b n = nLen; d5R2J:dI } %Q;:nVt catch(IOException e) ,\d03wha { eW}-UeT e.printStackTrace (); sN5Mm8~ } +~M.VsX ?Jgqb3+!o C 20VSwd return n; 8E9k7 } CoWT JRAU|gr 4E1j0ARQQ } T
eu.i iQLP~Z>,T X\*H7;k, /* "1%k"+& **SiteInfoBean.java <DII%7q,6/ */ PGVP0H+RV package NetFox; U#XW}T=| l\d[S] E33x)CP public class SiteInfoBean { ng6E&<Z yC4%z)t&R f rV_5yK' private String sSiteURL; //Site's URL w=0zVh_`( private String sFilePath; //Saved File's Path G(t&(t`[ private String sFileName; //Saved File's Name t~!ag#3['. private int nSplitter; //Count of Splited Downloading File Y|W#VyM- Ln/*lLIOb /sPa$D public SiteInfoBean() ]g,j {//nSplitter的缺省值为5 w]N;HlU //default value of nSplitter is 5 O<dCvH this("","","",5); 1W}k>t8?h' } k
,r*xt st#^pWL r|/9'{! public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Q
trU_c2k { XjxI@VXzUV sSiteURL= sURL; vVsaGW sFilePath = sPath; =eh!eZ9 sFileName = sName; k RSY;V this.nSplitter = nSpiltter; BV\~Dm]" :X7O4?ww 2|`Mb~E; } s=z$;1C u~mpZ"9$ 3 I+jc public String getSSiteURL() |O"Pb`V+ { 'gsO}xj return sSiteURL; {e0aH `me } !thFayq 'kg~#cf/+ U2\k7I public void setSSiteURL(String value) H;Gs0Qi; { Lu[Hz8 sSiteURL = value; v^[!NygShs } l
SuNZYaO DLe>EU;vS ] xIgP% public String getSFilePath() c]ga)A( { ww'B!Ml>F return sFilePath; ,I,Zl.5 } [g+WL\1 =OKUSHu@V i"E_nN"V public void setSFilePath(String value) {~ w! { xZloEfv.B sFilePath = value; U-{3HHA } S>"C}F$X @]EdUzzKq E|6@h8# public String getSFileName() @9k/od@mW { \Z~
<jv return sFileName; vJ&35nF& } N2u4MI2 $ylxl"Y 4(,X.GVY/ public void setSFileName(String value) >F/E,U ] { hWX4 P sFileName = value; ;B:\e8 } .l,NmF9 *_ajb: 1D~B\=LL} public int getNSplitter() 'w|N}
4 { M?['HoRo return nSplitter; s(MdjWw } 90H/Txq Lr`Gyl62 wvr`~ e public void setNSplitter(int nCount) -W|~YK7e { [[ }ukG4 nSplitter = nCount; -,$:^4 } oiz]Bd } 1 Va@w li}>xDSQ4 *r6v9 /* ZalL}?E
? **Utility.java J %E0Wd */ clIn}wQ package NetFox; X{h[ I7<UC{Ny ;N
_%O public class Utility { oV~S4|9: wFBSux$ 4@M}5WJ7 public Utility() B{V(g"dM { %XXjQ5p aZta%3`) a6/E TQ } LM!@LQAMY !VvM //线程睡眠 `0R>r7f)H public static void sleep(int nSecond) b1Ba} { f>? b2a2HX try{ ` ^z
l = Thread.sleep(nSecond); of`WP }
3BB/u%N} catch(Exception e) yv> 6u7 { ]:4\rBR3 e.printStackTrace (); @ZcI]G% } !zfV(& } j<L!(6B O%Qz6R //日志 sWP_fb1 public static void log(String sMsg) |j$$0N { 8:
VRq System.err.println(sMsg); ~jC$C2A0 } &Hl
w2^ ZP.~Y;Ch;- +n|@'= ] public static void log(int sMsg) }O6E5YCm { 9;A9Q9Yr System.err.println(sMsg); !1bATO:x } +1Rz + } e&9v`8}
!@
)JqF. 2W)KfS /* )fc+B_ **TestMethod.java ' KNg; */ `Z
(` package NetFox; Ja%isIdh X@~R< z+nq<%"' public class TestMethod { hOm0ND?;1 ZVCa0Km
D#X&gE public TestMethod() (i]0IYMXy* { ///xx/weblogic60b2_win.exe z+Ej`$E{lD try{ {=P}c:iW SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); iDlg>UYd //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); q9(hn_X@/ SiteFileFetch fileFetch = new SiteFileFetch(bean); 1_)Y{3L fileFetch.start(); |eej}G(,m} } sTi3x)#xB catch(Exception e){e.printStackTrace ();} #-g2p?+i& HU-#xK :2;c@ uj } -L2%,.E>4 zY&/lWW._ I -V=Z: public static void main(String[] args) z*/}rk4i { &3YXDNm new TestMethod(); twql)lbx } va;fT+k= } s&-dLkis{u 点击下载更多相关资料
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