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/* #,GpZ **SiteFileFetch.java kOJs;k */ [UFLL:_sC package NetFox; fMhMB |W. import java.io.*; J6&;pCAi import java.net.*; `MEH/ O cm :)%Vahu public class SiteFileFetch extends Thread { 1Te:&d X0p=jBye~> Xc`'i@FX SiteInfoBean siteInfoBean = null; //文件信息Bean X}g!Lp long[] nStartPos; //开始位置 a i}8+L8- long[] nEndPos; //结束位置 !3d+"tL
S FileSplitterFetch[] fileSplitterFetch; //子线程对象 a o\+%s long nFileLength; //文件长度 Qm ;ip E boolean bFirst = true; //是否第一次取文件 iB[%5i- boolean bStop = false; //停止标志 |>VDMezy File tmpFile; //文件下载的临时信息 HR)joD*q;[ DataOutputStream output; //输出到文件的输出流 ;h] zN F)
< f8F //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) =V%s^ public SiteFileFetch(SiteInfoBean bean) throws IOException .:$%3#N$(Y { u["Pg
siteInfoBean = bean; O@??
NF6G //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); -1Tws|4gc tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); P ,5P6Y9 if(tmpFile.exists ()) S'2B { jC <<S bFirst = false; glPOW read_nPos(); ym<G.3%1 } mu|#(u else G#n27y nh { |o=eS&) nStartPos = new long[bean.getNSplitter()]; W=]QTx,J nEndPos = new long[bean.getNSplitter()]; G^j/8e } cfpP? ^;Ap-2Ww ;o"}7'4*R% O_(/uLH } D|6prC%/ j9%=8Dn.< uppA`> public void run() )7O4j}B){ { *\:u}'[ //获得文件长度 7S 1
Y) //分割文件 9cX
~ //实例FileSplitterFetch 0|P RCq //启动FileSplitterFetch线程 ,Q >u
N //等待子线程返回 zVJwmp^ try{ 5\RKT)%X if(bFirst) SJj0*ry: { )O2giVq7[0 nFileLength = getFileSize(); CzST~*lH if(nFileLength == -1) 3[aCy4O { fg+Q7'*Vq System.err.println("File Length is not known!"); Z!7#"wO9+V } jA<v<oV else if(nFileLength == -2) ZrXvR`bsw { Ah)_mxK System.err.println("File is not access!"); [6)`wi } vR-rCve$P else l 0jjLqm: { xgnt)&7T for(int i=0;i<nStartPos.length;i++) #Ubzh`v { vgo-[^FiP$ nStartPos = (long)(i*(nFileLength/nStartPos.length)); Gb~*[ } _`*x} for(int i=0;i<nEndPos.length-1;i++) 97NF*-)N { uZ\ > nEndPos = nStartPos[i+1]; N>'1<i? } \0'o*nlJ nEndPos[nEndPos.length-1] = nFileLength; fQ'P2$ } #V*<G#B } TZ ?va@2 ?L+@?fVN a]BnHLx //启动子线程 fG2\p&z fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; N1zB;-0t for(int i=0;i<nStartPos.length;i++) 8yA: C { Tg)Fr) fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), fA2H8"r siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), wT3QSJ nStartPos,nEndPos,i); P%g[!9
' Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); f[!N]* fileSplitterFetch.start();
&tkkn2t } U}_l]gNn // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +#A>[,U siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); j'#W)dp( // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", CKmoC0. nEndPos = " + nFileLength); MjQKcL4%7 // fileSplitterFetch[nPos.length-1].start(); I[WW1P5 B/c_pRl; `GUj.+u //等待子线程结束 7Ha
+@ //int count = 0; [XhuJdr"u //是否结束while循环 .~4%TsBaY boolean breakWhile = false; w J/k\ yf2U-s ]ta]OK{s" while(!bStop) u&9|9+"N { HhH[p E write_nPos(); cRDjpc] Utility.sleep(500); 5E+l5M*( breakWhile = true; c<r`E ''s]6Jjw VSc;}LH for(int i=0;i<nStartPos.length;i++) B=JeZMn { #3f\,4K5 if(!fileSplitterFetch.bDownOver) \\Fl,' { Z; r}Gm breakWhile = false; GCkc[]2p break; 'dDd9 } ~^UQw?; } O\q|b#q}/ if(breakWhile) p>96>7w break; ac p-4g+j %1 9TJn%J$ e(@ YBQ/Z //count++; ahU\(= //if(count>4) B!jT@b{ // siteStop(); .zAB)rNc
| } EXK~Zf|&Z 1X.5cl?V &D\~-fOGb System.err.println("文件下载结束!"); <2HI. @^ } q UY;CEf catch(Exception e){e.printStackTrace ();} 4xjk^N9 } =iB0ak Q>cLGdzO \=?f4*4|/ //获得文件长度 Klzsr, public long getFileSize() XwOj`N{!H { o6P)IZ1 int nFileLength = -1; rgWGe6;! try{ CD:@OI URL url = new URL(siteInfoBean.getSSiteURL()); J0~Ha u HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Qb!9QlW httpConnection.setRequestProperty("User-Agent","NetFox"); ^PMP2\JQA ~^2Y*|{) WJ9Jj69 int responseCode=httpConnection.getResponseCode(); {*bXO8vi(( if(responseCode>=400) 7[[XNJP { EX7gTf# processErrorCode(responseCode); -\:pbR return -2; //-2 represent access is error \SkCsE#H } 6=3}gd5 BI?M/pIm g<-x"$(C& String sHeader; f>g>7OsD] 'Q Ff 7A ,9^wKS!7$ for(int i=1;;i++) Y .Na9&-( { n{J<7I e"* //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); '-p<E"#4Z //Utility.log(in.readLine()); ]O3[Te sHeader=httpConnection.getHeaderFieldKey(i); yk5-@qo if(sHeader!=null) X!2/cgU7 { U-6b>< if(sHeader.equals("Content-Length")) =P\H}?PF { 0%7c?3# nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); $&M"Ji break; A_6b 4T } d nWh}! } c!AGKc else q%i2'yE break; `PnB<rf:*1 } ~Aq;g$IJZ } ):E4qlB catch(IOException e){e.printStackTrace ();} #>g]CRN catch(Exception e){e.printStackTrace ();} Dtl381F J }A'QXtI/G )s4#)E1
Utility.log(nFileLength); ,kfUlv= ;]34l."85 m;)[gF return nFileLength; a*o#,T5A } }@_F( B tRZCOEo4 EtK,C~C}8 //保存下载信息(文件指针位置) nyD(G=Q5 private void write_nPos() BY.'0,H=k { NdZv* try{ T52A}vf4 output = new DataOutputStream(new FileOutputStream(tmpFile)); @jAuSBy output.writeInt(nStartPos.length); @x3x/gU for(int i=0;i<nStartPos.length;i++) % zHsh { -bdF= // output.writeLong(nPos); WBLfxr output.writeLong(fileSplitterFetch.nStartPos); xw(KSPN output.writeLong(fileSplitterFetch.nEndPos); SE&J)Sj] } RNE})B output.close(); kaQn'5 } m!L&_Z|j catch(IOException e){e.printStackTrace ();} 8*V^DM3n- catch(Exception e){e.printStackTrace ();} Jf{6'Ub } }A;J-7g6 B@D3aOvO Xs$k6C3 //读取保存的下载信息(文件指针位置) \2~Cn c*O private void read_nPos() P#-Ye<V~J( { d#cw`h<c~ try{ q|0Lu DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 2uu"0Rm% int nCount = input.readInt(); %:yJ/&-Q,Z nStartPos = new long[nCount]; NitWIj[U; nEndPos = new long[nCount]; :KGUO{_u for(int i=0;i<nStartPos.length;i++) T|`nw_0 { uA dgR nStartPos = input.readLong(); fT9$0:eO nEndPos = input.readLong(); 422d4Zu } /co^swz input.close(); CKeT%3 } gF,9Kv~ catch(IOException e){e.printStackTrace ();} Xn^gxOPM catch(Exception e){e.printStackTrace ();} |fkz=*rn } eS{lr4-] . S4Xw2MS ohklLZoZ private void processErrorCode(int nErrorCode) MX2Zm { //S/pCqED System.err.println("Error Code : " + nErrorCode); =Bu>}$BD } BWV)>
-V |{]W (/ `2Rd=M]? //停止文件下载 U<QO@5 public void siteStop() U0G( { 6O uB}* bStop = true; E-\Wo3 for(int i=0;i<nStartPos.length;i++) ]E$h7I fileSplitterFetch.splitterStop(); kBg,U 8|S w}nc^6qH M|nTO } VgLrufJ } &6V[@gmD
//负责部分文件的抓取 <XG&f **FileSplitterFetch.java xwoK#eC~F */ +Z99x# package NetFox; da<B6! @."_XL74 =0!PnBGYn import java.io.*; {2QCdj46 import java.net.*; %>u(UmFO o|FjNL U7i WYdt$ public class FileSplitterFetch extends Thread { Hz39v44 0<Q['l4Ar }}L :6^ String sURL; //File URL =E?kxf[X long nStartPos; //File Snippet Start Position ~~,] b long nEndPos; //File Snippet End Position (Ubz@s^ int nThreadID; //Thread's ID ^ z!g3 boolean bDownOver = false; //Downing is over D>neY9 boolean bStop = false; //Stop identical SbS*z: FileAccessI fileAccessI = null; //File Access interface VrDSN ~.\CG'g u*LMpTnn public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException tP/0_^m { b?S,% this.sURL = sURL; *l\wl @{ this.nStartPos = nStart; p,#t[K this.nEndPos = nEnd; ypyqf55gK nThreadID = id; 3[`/rg, fileAccessI = new FileAccessI(sName,nStartPos);//定位 Yl}'hRp } mN+
w, Uj]Tdg IqEE.XhaK public void run() zpi
Q ;P { x -CTMKX while(nStartPos < nEndPos && !bStop) fL-lx-~ { pK/r{/>r uW4)DT9[5 ,i0Dw"/u try{ NL`}rj URL url = new URL(sURL); 8x":7 yV& HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); E<6Fjy httpConnection.setRequestProperty("User-Agent","NetFox"); i" 0]L5=P String sProperty = "bytes="+nStartPos+"-"; !' ;1;k); httpConnection.setRequestProperty("RANGE",sProperty); ob= ]( Utility.log(sProperty); FO[x
c; (@wgNA-P EyU 5r$G InputStream input = httpConnection.getInputStream(); rBY)rUDd4 //logResponseHead(httpConnection); MPa F -;T!d {yj8LxX^ byte[] b = new byte[1024]; i{T mn int nRead; 1{%3OG^' while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) I$yFCd Xr { LTsX{z nStartPos += fileAccessI.write(b,0,nRead); aYy+iP'$ //if(nThreadID == 1) ~1xfE C/ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8rZJvE#c
} y^OT0mZkg pf&H !-M | R\PQ/) Utility.log("Thread " + nThreadID + " is over!"); mV~aZM0' bDownOver = true; } J_"/bB //nPos = fileAccessI.write (b,0,nRead); 4th*=ku } .5?e)o) catch(Exception e){e.printStackTrace ();} R*S9[fqC[ } "INIP? } 'BUix!k0< (%N=7? !]#@:Z //打印回应的头信息 TPE1}8p17 public void logResponseHead(HttpURLConnection con) R_JB`HFy= { VK)vb.: for(int i=1;;i++) R%%Uw %` { <vb%i0+b.^ String header=con.getHeaderFieldKey(i); &7-ENg9 [ if(header!=null) A[7\!bq5 //responseHeaders.put(header,httpConnection.getHeaderField(header)); w;
rQ\gj Utility.log(header+" : "+con.getHeaderField(header)); &|]GTN`E else m/E$0tf break; 9-B/n0 } e^ Aw%t } FqWW[Bgd d+m}Z>iQ1O }Mv$Up public void splitterStop() u)X]]6YJ { :ebu8H9f% bStop = true; =\ek;d0Tqb } Xh5&J9pw EOj.Jrs~ )G+D6s23 } dQ.:xu}~ (=\))t8J ;L`NF" /* GZq~Pl **FileAccess.java -f&m4J} E *//文件访问(定位,写) A
)q=.C#e package NetFox; f)_k_ < import java.io.*; g6D7Y<}d l b9O H6. public class FileAccessI implements Serializable{ L\cbY6b
!_P-?u //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 \Bvy~UeE)> RandomAccessFile oSavedFile; /z)H7s+ long nPos; r9
5hW U,g)N[| |a|##/ public FileAccessI() throws IOException S Boi| { 0F5QAR
O this("",0); a#pM9n~a } -J&
b~t@ W Te1E, M lj US-6 public FileAccessI(String sName,long nPos) throws IOException )x<oRHx] { )k~{p;Ke oSavedFile = new RandomAccessFile(sName,"rw"); 1m{c8Z.h/d this.nPos = nPos; dq4t@:\o0 oSavedFile.seek(nPos); O>c2*9PM } SB)Hz8< N5F+h94z] AMSn^75 public synchronized int write(byte[] b,int nStart,int nLen) Io*mFa? { b/]@G05>> int n = -1; O<\h_ try{ Ly~s84k_po oSavedFile.write(b,nStart,nLen); cT.8&EEW n = nLen; IxU#x* } L?&Trq7i catch(IOException e) Z,QSbw@,7 { %;ZDw@_< e.printStackTrace (); gyT3[*eh } lHc|:vG? X-']D_f|, +\GuZ5` return n; ']^_W0?= } .t9*wz TjWMdoU$J +01bjM6F_1 } _08y; _S b/g~;| < XTKAy;'5 /* k%K\~U8" **SiteInfoBean.java UNhM:!A */ # n\|Q\W package NetFox; )uK Tf=; VD0U]~CWR sOBuJx${m public class SiteInfoBean { q +*>T=k KrqO7 ApotRr$) private String sSiteURL; //Site's URL ( jtkY_ private String sFilePath; //Saved File's Path Dy|DQ> ?} private String sFileName; //Saved File's Name Q3 9;bz private int nSplitter; //Count of Splited Downloading File w<me(!-' Y{c+/n3d <;q)V%IUz public SiteInfoBean() gMB/ ~g5b0 {//nSplitter的缺省值为5 PESJ7/^E //default value of nSplitter is 5 G&\!!i|IQ this("","","",5); qYbPF|Y=Z } <xaB$}R ,&aD
U VCCG_K9' public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) f'& { lFc4| _c g sSiteURL= sURL; z\6/?5D#v sFilePath = sPath; L.$+W} sFileName = sName; kT,2eel this.nSplitter = nSpiltter; 1g1gu=|Q B[{Ie
G' ;o?Wn=J } |X0Ys8f I%#
e\ n,o;:c public String getSSiteURL() .9u,54t { fud Lm return sSiteURL; hZDv5]V:0 } O/{W:hJjd ~\~XD+jy" *h Bo,
public void setSSiteURL(String value) d
A' h7D { L}.V`v{zc sSiteURL = value; :taRCh5 } ~8^)[n+)x *
~4m!U_s -"X}
)N2 public String getSFilePath() Rss=ihlM { !#Hca return sFilePath; oQ_n:<3X } cwKOE?! -nKBSls J6*B=PX=( public void setSFilePath(String value) Ykt(%2L { <B=!ZC=n sFilePath = value; ey3;rY1 } "Qxn}$6- :O{oVR `Ef&h V public String getSFileName() ^><B5A>; { >6cENe_@t return sFileName; H=k`7YN } $[-{Mm C%+>uzVIw `Ao;xOJ public void setSFileName(String value) "yV)&4) { $N`uM sFileName = value; ?FRQ!R } fl18x;^I u#m(Py BlvNBB1^ public int getNSplitter() !WReThq { ^Wz3 q-^ return nSplitter; u:7=Yy
: } _ Oe|ZQ gDJ@s
*tZ#^YG{( public void setNSplitter(int nCount) G$HLta { ,*$/2nB^ nSplitter = nCount; tXIre-. 2} } Oz1ou[8k } b1{XGK' fMFlY%@t yYvv;E /* sP NAG
**Utility.java I#tEDeF2 */ aE2
3[So package NetFox; ]\:FFg_O6t {\HE'C/? 6@HY+RCx public class Utility { tKUy&]T UW[{Y|oE <.<Q.z public Utility() N#`aVW'{v2 { .iL_3:6f 7" wn024 WxS=Aip' } 7#R&
OQ S-:7P.#Q //线程睡眠 7TQh'j public static void sleep(int nSecond) [+st?;"GF { =9;jVaEMJL try{ 9h6xl i Thread.sleep(nSecond); IK6XJsz$J } 4l?98 catch(Exception e) _u :4y4} { 3&@MZF& e.printStackTrace (); s
`r tr } OQA3 ~\Vu } 6]}Xi:I g/q$;cB //日志 =;3|?J0= public static void log(String sMsg) CFh&z^]PR { u0J+Nj9 System.err.println(sMsg); o /fq } *X;g
Y m`c(J1Et `Vwj|[0k public static void log(int sMsg) wz!]]EQ!o { 4[!&L:tR System.err.println(sMsg); 7,e=|%7. } `q exEk@S } Ac.z6]p EVj48 uBks#Y*3$ /* ^tuJM: **TestMethod.java ANCgch\ */ %;zWS/JhL package NetFox; 7q|(ZZa M{7EFTy!y _pNUI{De public class TestMethod { "7)F";_(^ kx1-.~)p(z d~|qx public TestMethod() _V{WXsOx( { ///xx/weblogic60b2_win.exe =dX*:An try{ /:e|B;P`k SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ?XGZp?6 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); %p2 C5z? SiteFileFetch fileFetch = new SiteFileFetch(bean); aG\m3r fileFetch.start(); va;d[D,
} `>8| catch(Exception e){e.printStackTrace ();} n37( sKG kozg8 `\] Ok6Y'P } M14_w, &nn.h@zje %4L|#^7: public static void main(String[] args) ^B& Z { U)p2PTfB new TestMethod(); B>Nxc@=D } oT|E\wj } z<<` 1wqg 点击下载更多相关资料
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