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/* :z0s*,QH **SiteFileFetch.java ig2{lEkF */ R`0foSq \M package NetFox; 8zP:*|D import java.io.*; tc+GR?-7W import java.net.*; N?MJ#lC
F tIn7(C [;>zqNy public class SiteFileFetch extends Thread { r;&]?9)W0 -mev%lV Uq<a22t@ SiteInfoBean siteInfoBean = null; //文件信息Bean Ze[g0" long[] nStartPos; //开始位置 Y9IJ long[] nEndPos; //结束位置 (lyt"Ty FileSplitterFetch[] fileSplitterFetch; //子线程对象 @<@R=aqE long nFileLength; //文件长度 %8}WX@SB boolean bFirst = true; //是否第一次取文件 ua]\xBWx boolean bStop = false; //停止标志 YtwmlIar` File tmpFile; //文件下载的临时信息 \Dvl%:8 DataOutputStream output; //输出到文件的输出流 @A~B
, W~XV //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 4kW30Ma public SiteFileFetch(SiteInfoBean bean) throws IOException D..{|29,: { c,#~L7 siteInfoBean = bean; 2*~JMbm //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); }m=tzHB* tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); p56KS5duI. if(tmpFile.exists ()) Jcwh|w9D8 { g|&.v2 ' bFirst = false; 9IS1.3 read_nPos(); l _kg3e4 } N.fQ7z=Z(M else "e1{V8
4 { OPvj{Dv$0 nStartPos = new long[bean.getNSplitter()]; jRv;D#Hp nEndPos = new long[bean.getNSplitter()]; 2ru*#Z#( } aGq_hP B)j`}7O06 +z]:CF aJuj7y- } 2]of SdM ,XWay%8{E G"T;l"TAt8 public void run() ,\sR;=svK { ?/`C~e<J //获得文件长度 R`Ys;g/! //分割文件 <;$Sa's,LE //实例FileSplitterFetch :wv
:#EaH //启动FileSplitterFetch线程 ~6@c]: //等待子线程返回 D-TNFYYy2 try{ cM> G>Yzo if(bFirst) "K}W^J9v { @1pW!AdN nFileLength = getFileSize(); X7XCZSh#A if(nFileLength == -1) zer&`Vr { %KJ"rvi4K System.err.println("File Length is not known!"); (c|$+B^* } N3XVT{yo else if(nFileLength == -2) S7?f5ux { n}AR/3} System.err.println("File is not access!"); p"hm.=, } bl:a&<F else |:7EJkKZ { FT*yso:X/ for(int i=0;i<nStartPos.length;i++) 6SW|H"!! { ND9n1WZ&x nStartPos = (long)(i*(nFileLength/nStartPos.length)); u):%5F/ } mC{!8WC@k for(int i=0;i<nEndPos.length-1;i++) wS F!Xx0 { #K<=xP nEndPos = nStartPos[i+1]; uZqu xu. } qHC*$v#.V? nEndPos[nEndPos.length-1] = nFileLength; SHXa{- } 0,vj,ic*WX } :|3"H&FWK C1#o<pv t?%}hs\! //启动子线程 ;3.T* ?|o fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; >+A1 V[ for(int i=0;i<nStartPos.length;i++) +,vJ7 { F?RCaj fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {Gk}3u/ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), uNPD~TYN nStartPos,nEndPos,i); $+!}Vtb Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Azq#}Oe)u fileSplitterFetch.start(); |k7ts&2 } Q^1#xBd // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), eu}:Wg2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); i
h`y0(< // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Pjj;.c 7_j nEndPos = " + nFileLength); OVQxZ~uQ // fileSplitterFetch[nPos.length-1].start(); {jx#^n&5R ;H m-,W 0btmao- //等待子线程结束 T0*TTB&b //int count = 0; @ 2%.>0s. //是否结束while循环 6S! lD= boolean breakWhile = false; m5'__< 2kp|zX( :uT
fhr while(!bStop) %4r!7X|O< { =XRgT1>e write_nPos(); .^9/ 0.g8t Utility.sleep(500); XDrlJvrPL breakWhile = true; )'K!)?&d d 40'3]/{ vZ_DG}n11 for(int i=0;i<nStartPos.length;i++) W)$|Hm:H { 5x1%oC if(!fileSplitterFetch.bDownOver) 5Re`D|8 { R
uFu,H- breakWhile = false; U47k5s(J break; %T ,\xZ } %`s9yRk9>E } ,h wf if(breakWhile) ',J%Mv>Yf break; {*ko=77$* V %{9o *xZQG9`kt //count++; &t.>^7ELF //if(count>4) 8&2gM // siteStop(); _,K>u6N& } Ro3I/NI> HhQPgjZ/ x
w?9W4< System.err.println("文件下载结束!"); Op$J"R } *]>OCGsr catch(Exception e){e.printStackTrace ();} [hv3o0". } n_xQSVI0F #r:Kg&W2FO :hl}Zn~jt //获得文件长度 qRP8dH public long getFileSize() 9TXm Z { +}G>M=t:: int nFileLength = -1; k. ?
T.9 try{
8tFyNl`c URL url = new URL(siteInfoBean.getSSiteURL()); d~z<,_r5c HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7z P httpConnection.setRequestProperty("User-Agent","NetFox"); /xrq'|r?C /J9T=N c J"]yG)= int responseCode=httpConnection.getResponseCode(); d,Dg"Z if(responseCode>=400) Z#cU#)`y1 { 7"CH\*% processErrorCode(responseCode); ~RR_[t2Z return -2; //-2 represent access is error EH!EyNNb } Med"dHo7 *V@MAt k`4\.m"& String sHeader; E*T84Jh6 KbuGf$Bv h> 5~
(n8 for(int i=1;;i++) B|q3;P { !,(bXa\^ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); GE3U0w6WbK //Utility.log(in.readLine()); Y;/=3T7An sHeader=httpConnection.getHeaderFieldKey(i); >G3J3P( if(sHeader!=null) OTFu4"]M { Ci#5@Q9#w if(sHeader.equals("Content-Length")) I3E8vi%B. { iDkWW nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); `bi_)i6Low break; ~3-YxCn% } o j4)7{ } }HQT@&= else ,IVr4#w0= break; +KwF
U } e[k;SSs } oWaIjU0 catch(IOException e){e.printStackTrace ();} HS&uQc a catch(Exception e){e.printStackTrace ();} u%IKM\ ~PAbLSL*u JU%yqXO Utility.log(nFileLength); 5tCq}]q#P m{yNnJ3O ,"MUfZ return nFileLength; buM>^A" } 3v3Va~fm` eS# 0- 6~Oje>w; //保存下载信息(文件指针位置) v=Bh
A9[ private void write_nPos() Sdu@!<?B { uxJiec`& try{ Y X{ output = new DataOutputStream(new FileOutputStream(tmpFile)); [Oy2&C output.writeInt(nStartPos.length); xY}j8~k for(int i=0;i<nStartPos.length;i++) ^5@"|m1 { +&zuI // output.writeLong(nPos); 7Caap/L: output.writeLong(fileSplitterFetch.nStartPos); o >4>7
output.writeLong(fileSplitterFetch.nEndPos); Zz*mf+ } [6gHi.`p' output.close(); .j<B5/+ } Hr,lA( catch(IOException e){e.printStackTrace ();} ZxeE6M^w catch(Exception e){e.printStackTrace ();} ?bYQZJ>& } gl\{QcI8< d=OO(sf om39;nk!} //读取保存的下载信息(文件指针位置) N*oJ$:# private void read_nPos() 4y}a, { Y&Vbf>Hi+ try{ U
&k3 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Pc
?G^
Xol int nCount = input.readInt(); o?hw2-mH nStartPos = new long[nCount]; VKfHN_m* nEndPos = new long[nCount]; \C\y'H5 for(int i=0;i<nStartPos.length;i++) A)a+LW'=u { cz~11j# nStartPos = input.readLong(); Ecl7=-y nEndPos = input.readLong(); "7g8 d } [Ik
B/Xbw| input.close(); .;v'oR1x5 } PaI63 ! catch(IOException e){e.printStackTrace ();} o|n0?bThS- catch(Exception e){e.printStackTrace ();} hahD.P< } >Vm eS%6hUb :;u]Y7 private void processErrorCode(int nErrorCode) UlZ)|Ya<M { ;}9Ws6#XQs System.err.println("Error Code : " + nErrorCode); ^p%+r B.j[ } q9z!g/,d/ {[y"]_B4 w3|.4hS //停止文件下载 !Kqj&y5 public void siteStop() E1Aa2 { _~&vs< bStop = true; 1`JN for(int i=0;i<nStartPos.length;i++) soK_l|z:J fileSplitterFetch.splitterStop(); \J
g#X:d L#MxB|fcr n8D;6#P^ } |N.q[>^R } Bq=](<>> //负责部分文件的抓取 bN%MT#X **FileSplitterFetch.java ;8Q?`=a */ e7AI&5Eg{ package NetFox; JV{!Ukuyp+ " yl"A4p
S `X03Q[:q"[ import java.io.*; uXa}<=O import java.net.*; r<H^%##,w j`M<M[C*4N %pKs- n` public class FileSplitterFetch extends Thread { h0QQP AQGE(%X &
b2(Y4 String sURL; //File URL 5fv6RQD long nStartPos; //File Snippet Start Position %Ne>'252y long nEndPos; //File Snippet End Position XE%6c3s int nThreadID; //Thread's ID *njB
fH' boolean bDownOver = false; //Downing is over bv" ({:x boolean bStop = false; //Stop identical Bm>(m{sX> FileAccessI fileAccessI = null; //File Access interface iEO2Bil] EB<tX`Wp f3|=T8"t public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Q#bo!]H{t { *3oQS"8 this.sURL = sURL; oQB1fs this.nStartPos = nStart; 'B:De"_(N this.nEndPos = nEnd; Q%d[U4@ nThreadID = id; E*"E{E7 fileAccessI = new FileAccessI(sName,nStartPos);//定位
v^E2!X } +a@SdWf X2 kLbe bTKxv< public void run() g{{SY5qDj { U^S:2 while(nStartPos < nEndPos && !bStop) nrhpId { 4tKf $\H46Ji I#e*,#'S try{ QNBzc {XB URL url = new URL(sURL); %?wE/LU> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); EU~'n- httpConnection.setRequestProperty("User-Agent","NetFox"); @&>
+`kgU- String sProperty = "bytes="+nStartPos+"-"; Ki\jiflc7 httpConnection.setRequestProperty("RANGE",sProperty); zOp"n\ Utility.log(sProperty); S(xA}0] i<![i5uAI ]c+'SJQ InputStream input = httpConnection.getInputStream(); >u[ln@ l //logResponseHead(httpConnection); </Lqk3S-! hZG{"O!2s P3>2=qK"E( byte[] b = new byte[1024]; 8\_,Y
ji int nRead; AG=1TZI" while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) >qZRIDE5$ { %uMsXa nStartPos += fileAccessI.write(b,0,nRead); y[eNM6p //if(nThreadID == 1) Y^f|}YO%y // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); K|!)<6ZsG7 } P1jkoJ c3mlO[( {$.{VE+v5 Utility.log("Thread " + nThreadID + " is over!"); sNTfRPC bDownOver = true; |9JYg7< //nPos = fileAccessI.write (b,0,nRead); +fmZ&9hFNJ } '1*MiFxKq catch(Exception e){e.printStackTrace ();} Dne&YVF9V } rbWFq|(_ } !qq@F%tv 1Pc'wfj 7%WI //打印回应的头信息 O;tn5 public void logResponseHead(HttpURLConnection con) Vt>E\{@[t { ]t<%>Z$ for(int i=1;;i++) / nRaxzf' { '?4[w]0J< String header=con.getHeaderFieldKey(i); O#k+.LU if(header!=null) :oQaN[3>_ //responseHeaders.put(header,httpConnection.getHeaderField(header)); G_RK3E[FK Utility.log(header+" : "+con.getHeaderField(header)); T[J_/DE@ else yK;I<8+>_ break; X}
8U-N6) } $S/ 8T } =="SW"vNi uEY5&wX` ,;}RIcvQV public void splitterStop() "b;?2_w:E { bSzb! hT` bStop = true; `WL*Jb } a WC
sLH F!'"mU<f mZ%\`H+ } SuSZ,> d?qz7#kc XO>Y*7rO /* *QJ/DC$ **FileAccess.java <z PyID` *//文件访问(定位,写) FUqiP(A package NetFox; 8iB}a\]B import java.io.*; uR[i9%=8L( R7>@-EG J KGZ0yn public class FileAccessI implements Serializable{ 9:>vl0 yo=d"*E4^ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 mbK$Wp# RandomAccessFile oSavedFile;
%G*D0pE long nPos; qK
pU.rP oj, $6[]c)( public FileAccessI() throws IOException X;0@41t' { `Hqu2
'` this("",0); %|~UNP$ } Y,r2m nq SQ[}]Tm;n }#1{GhsS public FileAccessI(String sName,long nPos) throws IOException Q*5d~Yr ]R { |k0VJi oSavedFile = new RandomAccessFile(sName,"rw"); V^D#i(5 this.nPos = nPos; Gy5W;,$q oSavedFile.seek(nPos); qn . } g$qh(Z_s nK[$ID - =Hr|AhE public synchronized int write(byte[] b,int nStart,int nLen) +(
d2hSIF { Phczf int n = -1; f.{0P-Np try{ ( KrIMZ oSavedFile.write(b,nStart,nLen); ~kga+H n = nLen; =
zSrre } Ra5cfkH; catch(IOException e) WF]:?WE% { \`^jl e.printStackTrace (); +y2*[ } @QofsWC Q]HRg4r ?bEYvHAzg return n; L r,$98Dy } w@4+&v>O @9L9c k dqH36&< } @NF8?>! f{J7a1 `_ "(5}=T@, /* >;Bhl|r~z **SiteInfoBean.java F&\o1g-L */ {XAKf_Cg package NetFox; H0S7k`. VQCPgs x+&&[>-P public class SiteInfoBean { Jg:'gF]jt q&.!*rPD xFJ>s-g* private String sSiteURL; //Site's URL />?d
2? private String sFilePath; //Saved File's Path a;(:iMCi private String sFileName; //Saved File's Name >3JOQ;:d8 private int nSplitter; //Count of Splited Downloading File DI\^+P 9f
"*Oj CfAqMH*ip public SiteInfoBean() 6\bbP>ql {//nSplitter的缺省值为5 s}.nh>Q //default value of nSplitter is 5
Hi9]M3Ub this("","","",5); >/>a++19 } hN.#ui5 $ aCanDMcBnq ,/KHKLY7 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) =F`h2 A;a { gm8H)y, sSiteURL= sURL; _R]1J0 sFilePath = sPath; nL$tXm-x sFileName = sName; Au
{`oxD this.nSplitter = nSpiltter; zAH+{4lC+ k $);<= ZI `>V.}K^4 } ZE9*i}r
/swTn1<Y P
_ SJK public String getSSiteURL() myYe~f4=HQ { 9'tM65K return sSiteURL; mb#)w`< } Yv{AoL~ 6l=n&YO {Hb _o)S public void setSSiteURL(String value) &I70veNY { jq[>PvR sSiteURL = value; =($qiL'h } c/s'&gG33z k`?n("j au8)G_A public String getSFilePath() 6@d( <Z { HdGy$m` return sFilePath; }>j$Wr_h } Bg3^BOT @=9QV3D W&"FejD public void setSFilePath(String value) f; 22viE { ~6OdPD sFilePath = value; NEN br$,G } {\%x{ .VI2V-Q Un<~P@T% public String getSFileName() 'HC4Q{b` { 4fN<pG, return sFileName; jQc0_F\ } ?O_;{(F_ H1X6f7` Y-Z.AA, public void setSFileName(String value) l-mUc1.S { q3;HfZ sFileName = value; GUK/Xiu } qvT9d7x cgU7)`0j Gf"/fpeQx public int getNSplitter() ''V:+@Toh { ak'RV*>mT return nSplitter; ThHK1{87X} } M]&9Kg3 <mpkkCl, EZ$m4:{e public void setNSplitter(int nCount) 4g6d6~098; { eX=W+&lj nSplitter = nCount; AttDD{Ta } Q%85,L^ U } fQv^=DI# 4WNWn#M $,R|$0B7 /* mtHw! * **Utility.java l<gg5 Zea */ * @oAM,@ package NetFox; iR_X,&p
3c6#?<%0` \}cEHLq public class Utility { |=SaI%%Be ua2SW(C@ 1X=} public Utility() Jo2:0<VL { s]}P
jh8 fHM<6i<C )O_Y(^+ $ } D@!#79:) 0"ZRJl<)[I //线程睡眠 W#ev public static void sleep(int nSecond) VPf=LSxJe { HQ]g{JVld\ try{ "6.kZ$`% Thread.sleep(nSecond); dfk=%lZYd9 } :sJVklK catch(Exception e) )4DF9 JpD { xvb5-tK
- e.printStackTrace (); oas}8A) } A9[l5E } 32dR`qb 3]V"9+ //日志 Uc6P@O*, public static void log(String sMsg) <zrGPwk { UE*M\r< System.err.println(sMsg); hH%@8'1v } 2jA-y!(e 6VIi
nuOW
d':c public static void log(int sMsg) <D=U= 5 { uP<tP: System.err.println(sMsg); ZMoN } ^xFZ;Yf } 8nNRn[oS W*N^G p@ =`u4xa#m /* 06L/i, **TestMethod.java S)p1[&" M */ 3s"x{mtH package NetFox; A=Dzd/CUO HPT$)NeNc LLCMp3qBz public class TestMethod { z^@98:x c?IFI v,
9M AZ, public TestMethod() F`+}p- { ///xx/weblogic60b2_win.exe <$/'iRtRzW try{ !5&%
P b SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); h9$Ov`N(% //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); >}Fe9Y.o SiteFileFetch fileFetch = new SiteFileFetch(bean); X)x$h{ OE fileFetch.start(); HOBM?|37CU } EN'}+E
8 catch(Exception e){e.printStackTrace ();} qE!.C}L+ 9F@ Q !3E33 } }GRZCX> [O7:<co tWT@%(2~0 public static void main(String[] args) } U\n:@:2B { (w`9*1NO new TestMethod(); cl/}PmYIZ } G?v]p~6 } >+LFu?y 点击下载更多相关资料
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