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/* A'T! og|5 **SiteFileFetch.java fsu'W]f */ Zx6BK=4G package NetFox; 3mWN?fC import java.io.*; :HC{6W`$ import java.net.*; ygHNAQG~ ,fbO} /$E1!9J public class SiteFileFetch extends Thread { %O-wMl {v(3[7 G|V ^C_: SiteInfoBean siteInfoBean = null; //文件信息Bean 2B|3`trY4x long[] nStartPos; //开始位置 U}NNbGQj long[] nEndPos; //结束位置 |"arVde FileSplitterFetch[] fileSplitterFetch; //子线程对象 TA*49Qp long nFileLength; //文件长度 MEE]6nU boolean bFirst = true; //是否第一次取文件 *ZHk^d: boolean bStop = false; //停止标志 aX!J0&3 File tmpFile; //文件下载的临时信息 Ty>`r n DataOutputStream output; //输出到文件的输出流 zK}.Bhj# ~be&T:7. //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) &A>J>b public SiteFileFetch(SiteInfoBean bean) throws IOException !HFwQGP.Y { .d;/6HD[y siteInfoBean = bean; %tpjy, //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ) E5ax~ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); }wn GOr if(tmpFile.exists ()) Li}yK[\] { jd#{66: bFirst = false; |m ~| read_nPos(); >%{h_5 }
U7O2. y+ else eb7`R81G { H&I0\upd nStartPos = new long[bean.getNSplitter()]; -k'=s{iy nEndPos = new long[bean.getNSplitter()]; NWFZ:h@v } ;kdJxxUox nRvV+F0# Upf1*$p c#_%|gg } C0e<
_6p= ^#;2 Pd> _uDtRoI8 public void run()
uu HWN| { 7#Mi`W //获得文件长度 N52N ^X> //分割文件 |>m@]s7Z //实例FileSplitterFetch OA[w|Tt //启动FileSplitterFetch线程 Oa{M9d,l //等待子线程返回 ?k/Uw'J4u/ try{ R5Ti|k.~Y" if(bFirst) 778a)ZOzb { dP )YPy_` nFileLength = getFileSize(); _TH'v:C if(nFileLength == -1) Fm:Ri$iT { =*t)@bn System.err.println("File Length is not known!"); 9n1O@~ } W;2y.2* else if(nFileLength == -2) Xod#$'M> { L,n'G% System.err.println("File is not access!"); %ePInpb } u)%J5TR .Y else azN<]u@. { S);bcowf_ for(int i=0;i<nStartPos.length;i++) PM,I?lJ , { 8g$pfHt|e nStartPos = (long)(i*(nFileLength/nStartPos.length)); 2: fSn&*/> } !s5 _JO for(int i=0;i<nEndPos.length-1;i++) fy7]I?vm@ { yYF%U7N/n nEndPos = nStartPos[i+1]; y "gYv } IpHGit28 nEndPos[nEndPos.length-1] = nFileLength; L\!Pa+Iod } -GQ`n01 } )%P!<|s:5 ^dRB(E}|) zK?[6n89f //启动子线程 A+>+XA' fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ge*f<#|0U- for(int i=0;i<nStartPos.length;i++) {o AJL { h
~v8Q_6 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), S9-FKjU siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), rqSeh/<iD nStartPos,nEndPos,i); [WuN?H Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3(jI fileSplitterFetch.start(); Z+JPxe#7 } #TXgV0\F // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), |}=xA%) siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 'jqkDPn // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ZE#A?5lb nEndPos = " + nFileLength); 5V8WSnO // fileSplitterFetch[nPos.length-1].start(); ~Cm_=[ ??)IPRv?yF WQK ~;GV- //等待子线程结束 ~}+F$& //int count = 0; ]9F$/M# //是否结束while循环 LS
<\%A} boolean breakWhile = false; =HH}E/9z "KSzn a/^ojn while(!bStop) /5pVzv+rm { Sjv_% C$ write_nPos(); 67?O}~jbG Utility.sleep(500); V\vt!wBcB breakWhile = true; D.su^m_1 LB$#]
Z 16Cd0[h? for(int i=0;i<nStartPos.length;i++) imC>T!-7 { \2#7B8 if(!fileSplitterFetch.bDownOver) plN:QS$
{ 0QcC5y; breakWhile = false; N"L@ break; ~U}0=lRVS } )G
a5c } #?u#=] if(breakWhile) sYE| break; sQwRlx D?A3p6% fAYp\k //count++; VN]70LFz*i //if(count>4) c'O"</
// siteStop(); '(fQtQ% } ~+
[T{{ yGj'0c:: POB6#x System.err.println("文件下载结束!"); J;wDvt]]1 } (J}tCqP catch(Exception e){e.printStackTrace ();} NAg m?d } K-<<s .|UIZwW0 J@$KF GUs //获得文件长度 !A":L0[7n public long getFileSize() M$,4B { e>J.r("f int nFileLength = -1; \8Y62 try{ C@b-)In URL url = new URL(siteInfoBean.getSSiteURL()); 0Sx$6:-~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); SJ*qgI?}T httpConnection.setRequestProperty("User-Agent","NetFox"); vX30Ijm @;;3B $/J4?Wik int responseCode=httpConnection.getResponseCode();
9q[d?1 if(responseCode>=400) d
RIu A)0s { y?OK#,j processErrorCode(responseCode); >v#6SDg return -2; //-2 represent access is error ({$>o] <h } sU7fVke1 i4Da 'Uk \$+#7( K String sHeader; .VXadgM ?uh%WN6nU] %1\~OnT for(int i=1;;i++) Kt3T~k { =j^>sg] //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); jI/#NCKE //Utility.log(in.readLine()); {iXQUj
sHeader=httpConnection.getHeaderFieldKey(i); *)bh6b=7 if(sHeader!=null) TdeHs{| { SDu%rr7sQ if(sHeader.equals("Content-Length")) >zX`qv&> { \%}w7J; nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); q"0_Px9P break; 7<0oK|~c# } `|p8zV } 0d/
f4 else zX8'OoEH*9 break; R!>l7p/|H) } }Jo}K)>! } EG!Nsb^, catch(IOException e){e.printStackTrace ();} TUN6`/" catch(Exception e){e.printStackTrace ();} b
Bkg/p] lw`$(, xey?.2K1A Utility.log(nFileLength); \=c@ e'X"uH Xt. |U`ASo return nFileLength; 8}aSSL] } @{@DGc 0ky3rFSh1 ;>CM1 //保存下载信息(文件指针位置) L-`?=- 9` private void write_nPos() / _Fi4wZ { .R^q$U~v3 try{ ^tL]QE?| output = new DataOutputStream(new FileOutputStream(tmpFile)); KBI36=UV output.writeInt(nStartPos.length); ^!6T,7B B for(int i=0;i<nStartPos.length;i++) Dc9Fb^]QOG { _};T:GOT // output.writeLong(nPos); byHXRA)39 output.writeLong(fileSplitterFetch.nStartPos); x-T7
tr&( output.writeLong(fileSplitterFetch.nEndPos); k $E{'Dv } ZMEYF!jN output.close(); =>*9"k%m } LIRL`xU7 catch(IOException e){e.printStackTrace ();} ~.Er catch(Exception e){e.printStackTrace ();} PNpH)'C| } x75 3o\u! v*&WqVg _N"c,P0 //读取保存的下载信息(文件指针位置) &; [0.:; private void read_nPos() mW)C=X% { _SrkR7 try{ V9;O1 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); vv1W <X0e< int nCount = input.readInt(); & &:ZY4` nStartPos = new long[nCount]; ~}Z'/zCZf nEndPos = new long[nCount]; a/Cc.s for(int i=0;i<nStartPos.length;i++) T^@P.zX {
-+n?Q; nStartPos = input.readLong(); 6C- !^8[f nEndPos = input.readLong(); *#Iqz9X.Y3 } o(YF`;OhvS input.close(); PG*FIRDb } -:Jn|= catch(IOException e){e.printStackTrace ();} ui&^ m, catch(Exception e){e.printStackTrace ();} n ==+NL } Es&'c1$^s t+aE*Q <-xu*Fc private void processErrorCode(int nErrorCode) xHaoSs*C9 { O7xBMqMf System.err.println("Error Code : " + nErrorCode); R 5Cy% } d=a$Gd_$ ?j$*a7[w 8]&lUMaqVZ //停止文件下载 *cc|(EM public void siteStop() nE"0?VNW$ { W C3b_ia bStop = true; |dqvv for(int i=0;i<nStartPos.length;i++) +zzS fileSplitterFetch.splitterStop(); eQsoZQA1 z1LY|8$G '?b.t2 } C/!8NV1:4 } \2AXW@xE //负责部分文件的抓取 4.'KT;[_1/ **FileSplitterFetch.java 33w(Pw */ MKr:a]-'f~ package NetFox; ]|4mD3O fc9gi4y9 ;aUI3n% import java.io.*; UdX aC= Q import java.net.*; kA(q-Re$B* zNQ|G1o 9p9-tJfH. public class FileSplitterFetch extends Thread { cP[]\r+Kj et :v4^*f ?p!+s96 String sURL; //File URL Zbjj>*2%^ long nStartPos; //File Snippet Start Position Vr<ypyC long nEndPos; //File Snippet End Position AV?<D.< int nThreadID; //Thread's ID ]@7]mu:oL boolean bDownOver = false; //Downing is over :@q9ll`6u boolean bStop = false; //Stop identical Y^CbpG&-vC FileAccessI fileAccessI = null; //File Access interface +hd1|qa4 .@;,'Xw1~ ^1NtvQe@Y\ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 1@A*Jj[R%
{ parC~)b_ this.sURL = sURL; w\3'wD! this.nStartPos = nStart; {>=#7e-] this.nEndPos = nEnd; YK|Y^TU^ nThreadID = id; &)|3OJ'o fileAccessI = new FileAccessI(sName,nStartPos);//定位 b{Kw.?85 } 7Om)uUjU4 |A@Gch fd rCO:39L- public void run() d<l-Ldle { Y/w) VV while(nStartPos < nEndPos && !bStop) h\^> s$ { wq"AW yu =m=utd8 >SZ9,K4Gs try{ G0eJ<*|_ 3 URL url = new URL(sURL); ;j/-ndd&& HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); yD!V;?EnK httpConnection.setRequestProperty("User-Agent","NetFox"); ()+;KF8 String sProperty = "bytes="+nStartPos+"-"; R0*+GIRA( httpConnection.setRequestProperty("RANGE",sProperty); Ctxx.MM Utility.log(sProperty); v]HiG_C 0yxMIX U-EX)S^T[{ InputStream input = httpConnection.getInputStream(); C&ivjFf //logResponseHead(httpConnection); DqHVc)9 ,/g\;#:{@] R4|<Vp<U2 byte[] b = new byte[1024]; v#`Wf}G int nRead; <ST#<
$% while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) `'`T'+0 { jq&$YmWp nStartPos += fileAccessI.write(b,0,nRead); wp,z~raaS //if(nThreadID == 1) \HOOWaapN // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); RKP->@Gs } ~!!>`x UI:{*N**Z `$\Y,9E}x Utility.log("Thread " + nThreadID + " is over!"); _r|$H_# bDownOver = true; $V)LGu2(m //nPos = fileAccessI.write (b,0,nRead); a".uS4x } N+PW,a catch(Exception e){e.printStackTrace ();} hexq]' R } TPds )osZT } E#FyL>:.h _ QM EhybaRy;C //打印回应的头信息 `8TM<az-L public void logResponseHead(HttpURLConnection con) [hS?d.D { [#td for(int i=1;;i++) 0\jOg { Tf"DpA!_ String header=con.getHeaderFieldKey(i); `B6{y9J6 if(header!=null) -j[n^y'v //responseHeaders.put(header,httpConnection.getHeaderField(header));
Tc)T0dRP Utility.log(header+" : "+con.getHeaderField(header)); LxVd7r VY6 else L/GM~*Xp(O break; WJU`
g } ;NRT
a* } ~]/X,Cf GD'C^\EaZ g}3c r. public void splitterStop() UUY-EC7X { <E
BgHD) bStop = true; @WU_GQas3 } FV$= l
% KF'H|)!K %`}CbD6 } 4ij` ;?2vW8{p< :*&wnQMKR /* ojVpw4y. **FileAccess.java ok\+$+$ju *//文件访问(定位,写) {7eKv+30 package NetFox; P+3G*M=} import java.io.*; '{cN~A2b4 Bw*z4qb{yH ''BP4=r5n public class FileAccessI implements Serializable{ vo`wYJ3W ].dTEzL9X //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 !icpfxOpjQ RandomAccessFile oSavedFile; ^MJGY,r6b long nPos; {|xwvTlJ 0uU%jN$ M:`hb$k: public FileAccessI() throws IOException B@zJ\Ir[ { pN0c'COy^ this("",0); qqzQKN } r$v?[x>+K &ApJ'uC cfeX(0 public FileAccessI(String sName,long nPos) throws IOException DJQ]NY| { j5'Jp} oSavedFile = new RandomAccessFile(sName,"rw"); Xq>e]#gR this.nPos = nPos; @su{Uno8/ oSavedFile.seek(nPos); g=Qga09 } NxXVW oLr"8R\d>t 8nnkv,wa public synchronized int write(byte[] b,int nStart,int nLen) J82{PfQ" { l IFt/ int n = -1; t^CT^z try{ @>9p2u)= oSavedFile.write(b,nStart,nLen); mLkZ4OZ n = nLen; 4G>|It } 3(5RUI- catch(IOException e) 9)l_(*F { .@6]_h; e.printStackTrace (); ax^${s|{- } K%pmE?%,8 oy r2lfz* z}Z`kq+C return n; hx^a&" } \PLV]%3, 9>i6oF]Oq @&Nvb.5nT } /M3D[aR<d HQ
s)T i`>X5Da5 /* jYy0^)6X( **SiteInfoBean.java 5dgBSL$A}] */ MtYP3: package NetFox; nUd\4;J# 6gKOpa /B!m|)h5~ public class SiteInfoBean { tH'VV-!MZ *cf"l \9}5}X_x. private String sSiteURL; //Site's URL WD\{Sdx:r private String sFilePath; //Saved File's Path -1_Z*?=- private String sFileName; //Saved File's Name ^ Wl/ private int nSplitter; //Count of Splited Downloading File xF/D YXC{8 NZTYT\7 zl:D|h77 public SiteInfoBean() }-L@AC/\# {//nSplitter的缺省值为5 WvJ?e //default value of nSplitter is 5 +E [b Lz^ this("","","",5); RE .@ +A } p&4n3%(R@ Nb#7&_f= ;Bb5KD public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ;:|KfXiC8 { 2Y4&Sba^Y sSiteURL= sURL; <!N;(nZ9}O sFilePath = sPath; _B1uE2j9 sFileName = sName; +wUhB\F
* this.nSplitter = nSpiltter; w+37'vQ YxtkI:C? pHvE`s"Ea } H n!vTB O<h#|g1 ziycyf.d public String getSSiteURL() 1!`768 { PbPP1G') return sSiteURL; 668bJ.M\O } :(b3)K be/1-=m .O#lab`:2 public void setSSiteURL(String value) =Yj[MVn { +=h!?<*C8 sSiteURL = value; GzXP } "J5Pwvs- 4) 3pa* %'T>kz *A public String getSFilePath() \z`d}\3(R {
)M N
yOj return sFilePath; zsXH{atY } ]2%P``Yj DP_Pqn8p&M 62x< rph public void setSFilePath(String value) ptv4v[gQ { ZY!pw6R1>* sFilePath = value; V3W85_* } i`aG j$|C/E5? 0o|,& K public String getSFileName() )Zf}V0!?+ { B^(rUR return sFileName; dO4#BDn"= } LXC`Zq\ j& o+KV ^X;Xti public void setSFileName(String value) ba9<(0` { &E &iaw! sFileName = value; 56Y5kxmi } Hs}"A,V |~uzQU7 A] ?O&m| public int getNSplitter() FFeRE{,
{ 9H}iX0O return nSplitter; =P;;&j3Z } C9g~l}=$& WQLL[{mhS +R#`j r" public void setNSplitter(int nCount) mjl!Nth:< { ,L{o,qzC nSplitter = nCount; h!N&gZ[0 } R,w54}, } v~2XGm sR>;h / xFm{oJ!]& /* FJ%R3N\ **Utility.java :iQ^1S`pH */ aho<w+l@ package NetFox; vx5o
k1UY gqdB!l4 u4#~
i0@ public class Utility { u1|P'>;lF l&sO?P[ / A[ECa{v public Utility() YNJpQAuSn) { 3Ra\2(bR G2+)R^FSC LYy:IBI7_ } k *;{n8o?) 1yaIV+_y/ //线程睡眠 BQuliX& public static void sleep(int nSecond) t6%xit+ { ilRm}lU|x try{ KYRm
Ui# Thread.sleep(nSecond); Y\g90 } 4}8+)Pd catch(Exception e) M`C~6Mf+ { y|+~>'^JR e.printStackTrace (); >H1|c%w } af?\kBm } KB,~u*~! /,!7jF: //日志 Z:o
86~su public static void log(String sMsg) ;c
m wh< { jRdhLs,M9 System.err.println(sMsg); A D}}>v } '^F|k`$r Ss<_K>wk 3dxnh,]&@ public static void log(int sMsg) %is,t<G { V:(w\'wm System.err.println(sMsg); 1Oca@E\Z. } CVGOX z } S1az3VJI\ ^!o1l-Y^gr S QM(8*:X /* 17n+4J] **TestMethod.java dp
UdFuU" */ DUuC3^R package NetFox; Y( V3PnH yYG3/Z3u5 .e FOfV) public class TestMethod { T[4[/n>i 1O]5/Eu RvPniT(<? public TestMethod() p'Y&Z?8 { ///xx/weblogic60b2_win.exe Ukh$`q} try{ lC /Hib SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); %Vw|5yA4 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5);
rTP5-4 SiteFileFetch fileFetch = new SiteFileFetch(bean); w;yiX<t< fileFetch.start(); M|[@znzR< } }rKJeOo^x? catch(Exception e){e.printStackTrace ();} _UH/}!nqB Y0Hq+7x ]F"(OWW } g:uvoMUD e>?_)B4 SG
dfhno; public static void main(String[] args) B@"SOX { KJ0xp hf new TestMethod(); TbKP8zw{ } g+ >=C } i14[3bPLk! 点击下载更多相关资料
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