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/* B?y[ %i **SiteFileFetch.java qElPYN*wF */ U\-.u3/ package NetFox; z^WY5~? import java.io.*; >&F:/ import java.net.*; ?C ?I"?J/zm Mm9*$g!R public class SiteFileFetch extends Thread { XV`8Vb ;d]vAj yF|+oTp SiteInfoBean siteInfoBean = null; //文件信息Bean hJz]N$@W long[] nStartPos; //开始位置 OK47Q{.gh long[] nEndPos; //结束位置 /q'-.-bo FileSplitterFetch[] fileSplitterFetch; //子线程对象
K\s<<dRa long nFileLength; //文件长度 wwJ s_f\ boolean bFirst = true; //是否第一次取文件 j#Lj<jX!xR boolean bStop = false; //停止标志 FP*kA_z$ File tmpFile; //文件下载的临时信息 jc#gn&4C DataOutputStream output; //输出到文件的输出流 9RkNRB)8 t)~$p#NS //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) V{x[^+w7X~ public SiteFileFetch(SiteInfoBean bean) throws IOException tYSfeU { GZY:EHuz[ siteInfoBean = bean; 2 &_>2"=<@ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); &fU48n1Uh tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); N S*Lv if(tmpFile.exists ()) |+>U91! { ?|!m bFirst = false; J Rj{Q 1J read_nPos(); :hR^?{9Z4> } R|wS*xd , else xj3{Ke`6 { FT J{ nStartPos = new long[bean.getNSplitter()]; p1mAoVxR nEndPos = new long[bean.getNSplitter()]; && PZ; } 7 `c! ]v]:8>N W ,v0~ wqJl[~O$ } iWW
>]3Q /WK1( B: P.1Z@HC public void run() &0J8ICd= { 3v `@** //获得文件长度 \YF07L]qs- //分割文件 ,^eOwWV //实例FileSplitterFetch U%;E: | //启动FileSplitterFetch线程 A* Pz-z>z //等待子线程返回 D*sL&Rt][Y try{ nHp$5|r< if(bFirst) %P(2uesd { \0 &$n nFileLength = getFileSize(); [6/8O if(nFileLength == -1) kr!>rqN5 { iQLP~Z>,T System.err.println("File Length is not known!"); >enP~uW[# } Kq+vAp). else if(nFileLength == -2) ;<xPzf { IMpL+W. System.err.println("File is not access!"); E33x)CP } |W&K@g$ else #c'}_s2F[ { ~*Y/#kPY for(int i=0;i<nStartPos.length;i++) #Pg?T%('` { wi[FBLB/8 nStartPos = (long)(i*(nFileLength/nStartPos.length)); ,JPDPI/a } WE-+WC!!: for(int i=0;i<nEndPos.length-1;i++) -B-HZ_ { 1W}k>t8?h' nEndPos = nStartPos[i+1]; 7; ?7q } O~6AX)|&= nEndPos[nEndPos.length-1] = nFileLength; u9]M3> } ??++0<75 } Lw?>1rTT/ t_(S e &b2@+/ F //启动子线程 /1= x8Sb fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Q^?$2ck= for(int i=0;i<nStartPos.length;i++) |O"Pb`V+ { %L-{4Z!"sI fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), (dV7N siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), %0 U@k!lP nStartPos,nEndPos,i); [DTe Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %Rk0sfLvn fileSplitterFetch.start(); 7~QAprwVS } <\d2)Iv // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -;i:bE siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); :&E~~EUW // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", gxC`Ml nEndPos = " + nFileLength); #ZHKq7 // fileSplitterFetch[nPos.length-1].start(); sp0_f;bC cwQ*P$n '}F9f? //等待子线程结束 M[_Ptqjb //int count = 0; @9k/od@mW //是否结束while循环 2{g&9 boolean breakWhile = false; vJ&35nF& \oP $ylxl"Y while(!bStop) (;HO3Z".q$ { )k `+9}OO write_nPos(); V{}TG] Utility.sleep(500); F0kQ/x breakWhile = true; gDX\ p>7 >9<rc[ XqcNFSo) for(int i=0;i<nStartPos.length;i++) Jr>Nc}!U { ^{E_fQJX if(!fileSplitterFetch.bDownOver) f
uH3C~u7< { nGTqW/k[+s breakWhile = false; 90H/Txq break; wvr`~ e } |I.5]r-EK } GB6(WAmr if(breakWhile) +>%AG&Pc break; 'sk M$jr ;b_<5S vgr5j //count++; \,I{*!hw //if(count>4) a3He-76 // siteStop(); Q"oJhxS } %r:4'$E7| KkR.p,/ Lk-h AN{[ System.err.println("文件下载结束!"); }F3}"Ik'L } +]Z*_?j9{ catch(Exception e){e.printStackTrace ();} t
Q>/1 } ~6OdwGWV owO&[D/ p\]rxtm //获得文件长度 1}CJ& public long getFileSize() SNH AL F { P>|sCF int nFileLength = -1; ~k ]$J|}za try{ 8,B#W#*{ URL url = new URL(siteInfoBean.getSSiteURL()); G/KTF2wl7 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~BXy)IB6 httpConnection.setRequestProperty("User-Agent","NetFox"); ?.nD!S@ @,pn/[ H\|H]: CE int responseCode=httpConnection.getResponseCode(); Jb8%A@Z+ if(responseCode>=400) Q:Y`^jP { "m}N
hoD4 processErrorCode(responseCode); m`@~ZIa?>B return -2; //-2 represent access is error ',6d0>4* } xQqZi b5I G4uOY?0N 48mTL+* String sHeader; rFto1m miY=xwK& EDA6b] for(int i=1;;i++) b|Eo\l2 { 3E8 Gh>J_ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); t0T#Xb //Utility.log(in.readLine()); }&EdA;/o_ sHeader=httpConnection.getHeaderFieldKey(i); uN$ <7KB" if(sHeader!=null) qp/nWGj { P_
b8_ydU if(sHeader.equals("Content-Length")) :IozWPs* { (%{!TJg ZR nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); >5Sm.7}R break; Q1DiEg } IXR%IggJA } jZqCM{ else \YH*x` break; w|ct="MG } XBTjb }
_+&/P& catch(IOException e){e.printStackTrace ();} QEY#U| catch(Exception e){e.printStackTrace ();} byIP]7Ld {\
BFWGX "s\himoa Utility.log(nFileLength); Lo +H&- G-DOI s09 &A]G return nFileLength; ESkhCDU } [iN\R+: kg$w<C@#" sg_%=; //保存下载信息(文件指针位置) 9]a!1 private void write_nPos() 0}$R4<"{Y> { H$xUOqL try{ =K9- output = new DataOutputStream(new FileOutputStream(tmpFile)); S$nEflcz output.writeInt(nStartPos.length); -qB{TA-.\ for(int i=0;i<nStartPos.length;i++) W)u9VbPk[ { } DkdF // output.writeLong(nPos); fvoPV&: output.writeLong(fileSplitterFetch.nStartPos); WAGU|t#." output.writeLong(fileSplitterFetch.nEndPos); ET~^P } E, |OMK# output.close(); F^7qr } s&6/fa
catch(IOException e){e.printStackTrace ();} G}'\ catch(Exception e){e.printStackTrace ();} nD{{/_"' } 3O?[Yhk`. 51!#m| <+ckE2j //读取保存的下载信息(文件指针位置) 5Ja[p~^L private void read_nPos() G 2FD'Sf { 2L7ogyrU/A try{ -qDL': DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ^W[3RiG int nCount = input.readInt(); `q?@ Ob& nStartPos = new long[nCount]; sq}uq![?M nEndPos = new long[nCount]; ]hY4
MS for(int i=0;i<nStartPos.length;i++) WNiM&iU { W%K=N-kE_ nStartPos = input.readLong(); ?qczMck_ nEndPos = input.readLong(); |Q#CQz } 6b h.5| input.close(); e|.a%,Dcy } +Pb@@C& catch(IOException e){e.printStackTrace ();} l gTw>r catch(Exception e){e.printStackTrace ();} n`|CDKb } Kl*/{&,P WVh]<?GWXk 7iH%1f private void processErrorCode(int nErrorCode) gnZc`)z { #80r?,q System.err.println("Error Code : " + nErrorCode); A{\!nq_~N } UAtdRVi]M r-c1_
[Q# [J43] //停止文件下载 Zex`n:Wl?j public void siteStop() nb U?:=P { >2LlBLQ bStop = true; Trml?zexD for(int i=0;i<nStartPos.length;i++) :&$WWv fileSplitterFetch.splitterStop(); )<^G]ajn gqACIXR 3qwSm< } _S6SCSFc } L7$1 rO< //负责部分文件的抓取 2<^eVpNJR **FileSplitterFetch.java cK1RmL"3 */ cAzlkh package NetFox; MF4B 2d r$;u4FR MK, $# import java.io.*; DVjsz import java.net.*; _SQ0`=+ X6EnC57 5@{~830 public class FileSplitterFetch extends Thread { KvuM{UI5 B7nm7[V Ct9*T`Gl String sURL; //File URL j79$/ Ol
long nStartPos; //File Snippet Start Position C:
a</Sl long nEndPos; //File Snippet End Position t3;QF int nThreadID; //Thread's ID Hp-vBoEk boolean bDownOver = false; //Downing is over hrTl:\ boolean bStop = false; //Stop identical @z7$1pl} FileAccessI fileAccessI = null; //File Access interface <|4L+?_(& #^bn~ ZTK)N public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Oftjm
X_ { 8DZ
OPA this.sURL = sURL; h>&t``< this.nStartPos = nStart; %jj\w> this.nEndPos = nEnd; H.[t&VO nThreadID = id; @ R;o $n fileAccessI = new FileAccessI(sName,nStartPos);//定位 3+WostOx } !i?aRI/6 Xm[Cgt_? Y .\<P*iO public void run() d0N/!; { H4g1@[{|0O while(nStartPos < nEndPos && !bStop) 1_G5uHO { zZ{(7Kfz _:?b-44 jMQ7^(9- try{ #%SF2PB; URL url = new URL(sURL); $O^U" HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6ragRS/'x httpConnection.setRequestProperty("User-Agent","NetFox"); G0pqiU6 String sProperty = "bytes="+nStartPos+"-"; A=pyaU`aE httpConnection.setRequestProperty("RANGE",sProperty); TvwkeOS#}7 Utility.log(sProperty); qM:*!Aq0g ;&]oV`Ib z%Ivc*x5 InputStream input = httpConnection.getInputStream(); UViWejA/*u //logResponseHead(httpConnection); Ln&CB!u #F6!x3Z (c1Kg byte[] b = new byte[1024]; I8{ohFFo int nRead; |NXe{q7{ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ='\E+*[$I { .*g^
i` nStartPos += fileAccessI.write(b,0,nRead); *|&&3&7 //if(nThreadID == 1) o9AwW // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); WO"<s{v } V?o%0V +"Mlj$O OK=ANQjs( Utility.log("Thread " + nThreadID + " is over!"); P/doNv}iG bDownOver = true; zc%HBZ3p //nPos = fileAccessI.write (b,0,nRead); F`JW&r\ } qJT|om
LY catch(Exception e){e.printStackTrace ();} -)Y[t Z^*` } Dh B*k<S } H(F9&6} &=hkB9
; 7xjihl3 //打印回应的头信息 n%={!WD
public void logResponseHead(HttpURLConnection con) s!\Gi5b { R)BH:wg" for(int i=1;;i++) -{s9PZ3~_ { XT~]pOE;D String header=con.getHeaderFieldKey(i); ~mYCXf oc{ if(header!=null) %n:ymc
$} //responseHeaders.put(header,httpConnection.getHeaderField(header)); nTxN>?l2E Utility.log(header+" : "+con.getHeaderField(header)); 53)*i\9& else Lo^gg#o break; <%EjrjdvL+ } C+X-Cp } 6eHw\$/ EGJrnz8 m005*>IY public void splitterStop() /faP@Q3kR { y`p(}X`> bStop = true; &U0Y#11Cx } 5qQ\ H} F@Cxjz "IKbb7x } C#D8
E.W anxwK47 Lt\=E8&rh /* OZi4S3k **FileAccess.java K:8.
Dvn *//文件访问(定位,写) `*HM5 1U package NetFox; (`FY{]Wz! import java.io.*; - {| &Y|AX2KUC dn|OY.`| public class FileAccessI implements Serializable{ NGOyd1$7N G=qT{c8Q //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 tboc7Hor4 RandomAccessFile oSavedFile; |g8Q.*"l[ long nPos; A<<Bm M.% 1n|K $qy ST public FileAccessI() throws IOException f,QBj{M, { +a!uS0fIJi this("",0); co [ } Onj)AJ9M0r mUjM5ceAXO o`}(1$a> public FileAccessI(String sName,long nPos) throws IOException Trt1M { $ J)2E g oSavedFile = new RandomAccessFile(sName,"rw"); O>kM2xw this.nPos = nPos; 0rj50$~$] oSavedFile.seek(nPos); Xhm)K3RA*T } RoeLf Ow e{7"7wn= 4&+lc* public synchronized int write(byte[] b,int nStart,int nLen) `/L D:R { TwLQ;Q int n = -1; 7bC)Co#: try{ _"c:Z !L oSavedFile.write(b,nStart,nLen); ".Sa[A;~ n = nLen; 1]]#HTwX } i :Sih"= catch(IOException e) Nvj0MD{ X { rX@?~(^ML e.printStackTrace (); Spt;m0W90 } +W[NgUrGJ mr\C
[3fmhc return n; ]Wdnr1d~8 } r>3y87 bbxo!K
m" 4oA9|}<FR } 66%4p%#b4 Xgyi}~AoaU
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j_ /* Z]x)d|3; **SiteInfoBean.java gL}x|Q2` */ 1_0\_| package NetFox; Lc5I?}:;L g]Fm%iy ypV>* public class SiteInfoBean { i*2l4 x>m=n_ b?deZ2"L# private String sSiteURL; //Site's URL q"|#KT^) private String sFilePath; //Saved File's Path UTph(U# private String sFileName; //Saved File's Name )9'Zb`n private int nSplitter; //Count of Splited Downloading File N,~"8YSo I!;vy/r f5dctDHP public SiteInfoBean() +L\bg|; {//nSplitter的缺省值为5 URb //default value of nSplitter is 5 <Pg<F[eDM this("","","",5); IBSoAL } I4%25=0? z)0%gd| Z|IFT1K public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Sxg&73;ZV { fOkB|E] sSiteURL= sURL; #xTu { sFilePath = sPath; ->Bx>Y sFileName = sName; CyEEE2cV this.nSplitter = nSpiltter; G;Thz +U= !svE 5x1_rjP$| } kV:C=MLI 2z615?2_U ti}G/*4 public String getSSiteURL() F}dq~QCzw { k%fy return sSiteURL; JB xizJBP } ga+Z6|t %x zgTZ IWD21lS public void setSSiteURL(String value) H]d'#1G { k=8L hO sSiteURL = value; SdOE^_@: } ?7CHHk sksop4gu5 U**v'%{s public String getSFilePath() 5'hQ6i8 { jFThW N return sFilePath; >h<bYk "9Q } .vJt&@NO \QKr2| JU\wvP5j public void setSFilePath(String value) Q1(6U6L { J~URv)g sFilePath = value; @mu2,% } <<:a>)6\
e+=IGYC >iIUS public String getSFileName() ":upo/xN { [d~25 return sFileName; Y%iimbBY| } BpQ/$?5E" 875BD U '#faNVPABh public void setSFileName(String value) 7gY^a MW { d[Lr`=L; sFileName = value; Ul?92 } %B{NH~ &?@5G wBK%=7 public int getNSplitter() uRu)iBd D { M$Of. return nSplitter; )-4xI4 } ;4 rTm@6 !j|93* HD95>% public void setNSplitter(int nCount) _2C[F~ +l { 2AZ)|dM'` nSplitter = nCount; G,J~Ed } zrJ/Fs+s } |vY0[#E8& d|8iD`sZz 1~#2AdG /* 6W abw: **Utility.java aj:B+}1 */ P,[O32i# package NetFox; 0u'qu2mV C'c9AoE5> $M T'ZM public class Utility { xXktMlI iS"( NHCdf* public Utility() k'K&GF1B { AShnCL8uR !L#>wlX) R""P01IZH } ]$>O-- 6DFF:wrm& //线程睡眠 TFWx(}1 public static void sleep(int nSecond) vNhi5EU { O,kzU,zOs try{ %`P6a38j Thread.sleep(nSecond); bJo)rM:m } ZgcJxWC< catch(Exception e) \P;%fN { dT%$"sj5 e.printStackTrace (); fq.ui3lP) } `;ofQz4 } GN4'LU N;9m&)@JR' //日志 ) /kf public static void log(String sMsg) G $TLWfm
{ GnlP#; System.err.println(sMsg); P9)E1]Dc$ } )")_aA >xU$)uE& )x/Spb public static void log(int sMsg) UJXRL
{ p9;Oe,Il System.err.println(sMsg); ,m-z D } ?mJNzHrq; } cuO)cj]@e ,&$+{3 WB2An7i@"{ /* IcM99'P( **TestMethod.java
L7*,v5 */ R^PPgE6!$ package NetFox; gAA2S5th 8,Jjv* Une,Y4{u public class TestMethod { gBzg'Z .Vm!Ng )j sw.cw}1 public TestMethod() L>
ehL(]! { ///xx/weblogic60b2_win.exe uES|jU{]b try{ *OOi SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); +/tNd2 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); $niJw@zC SiteFileFetch fileFetch = new SiteFileFetch(bean); '~HCYE:5 fileFetch.start(); 7~@9=e8G } #V[j Q Vl catch(Exception e){e.printStackTrace ();} d{cd+An }pJ6CW 3BuG_ild } _d#1muZ?p| WgxGx`Y) '?Mt*%J@=$ public static void main(String[] args) poZ04Uxo> { zW^_w&fd^j new TestMethod(); ^gb3DNV~y } G_GV } [?3]+xr: 点击下载更多相关资料
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