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/* +~R.7NE% **SiteFileFetch.java 9b{g+lMZo */ K9x*Sep
package NetFox; !nP8ysB import java.io.*; K1m!S9d`x import java.net.*; &%_y6}xIw b?+Yo>yF8 kphy7>Km public class SiteFileFetch extends Thread { c]cO[T_gGa :kf3_?9rc +1JZB*W SiteInfoBean siteInfoBean = null; //文件信息Bean : L6-{9$ long[] nStartPos; //开始位置 =y,yQO long[] nEndPos; //结束位置 \K4CbZ,. FileSplitterFetch[] fileSplitterFetch; //子线程对象 |Oj,S|Z: long nFileLength; //文件长度 BDB zc5Q( boolean bFirst = true; //是否第一次取文件 2i4Dal boolean bStop = false; //停止标志 e!:?_z." File tmpFile; //文件下载的临时信息 S`'uUvAA DataOutputStream output; //输出到文件的输出流 @=aq&gb f:)K //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) +v `^_ public SiteFileFetch(SiteInfoBean bean) throws IOException @BB,i / { I'6ed`| siteInfoBean = bean; kBDe*K.V //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); e\|E; l tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); +Qb2LR if(tmpFile.exists ()) TZ[Fu{gZ { +Fkx") bFirst = false; HzO0K=Z=R0 read_nPos(); ZRVF{D??"% } {?h6*>-^Z else P[J qJi/H { EC\rh](d
1 nStartPos = new long[bean.getNSplitter()]; c,u$tnE) nEndPos = new long[bean.getNSplitter()]; \`<s@U } |'l* $ |[n|=ORI' L>R!A3G1 -7A!2mRiz } 1J!tcj1( >f9]Nj `A}{
I}xq public void run() A_4\$NZ^ { Pq_ApUZa //获得文件长度 s-YV_ //分割文件 B )3SiU //实例FileSplitterFetch w|U@jr*H] //启动FileSplitterFetch线程 -iZ js //等待子线程返回 U:\oGa84A try{ u
BW if(bFirst) \2VZkVO9 { ywa .cq nFileLength = getFileSize(); %L=h}U13 if(nFileLength == -1) 6T'43h. : { q~A|R System.err.println("File Length is not known!"); Z;> aW;Wt } vXWESy else if(nFileLength == -2) ]H@uuPT! { $EHn;~w T System.err.println("File is not access!"); w}KcLaI } cF>;f(X else :\HN?_?{4 { ?9.? w-Q' for(int i=0;i<nStartPos.length;i++) xVmUmftD { :~YyHX nStartPos = (long)(i*(nFileLength/nStartPos.length)); KgkB)1s@n } tYxlM! for(int i=0;i<nEndPos.length-1;i++) ieg PEb { U";Rp&\3; nEndPos = nStartPos[i+1]; Lm2cW$s } ~d1RD nEndPos[nEndPos.length-1] = nFileLength; i3\oy`GJ } ^K@GK } PyJblW m`w6wz oFA$X Y //启动子线程 ^{,},
i fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; (IWd?,H,n for(int i=0;i<nStartPos.length;i++) e}@J?tJK.L { x-P_}}K 79 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), W;j)ux7jMY siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), RB
0j!H: nStartPos,nEndPos,i); "e?#c<p7 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?q8g<-? fileSplitterFetch.start(); a*@Z^5f } l%V}'6T // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), zL=I-f Vq siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); e5y`CXX // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", O?<_,-. nEndPos = " + nFileLength); yD'h5)yu // fileSplitterFetch[nPos.length-1].start(); W5yu`Br =
ft$j YXOD
fd%L //等待子线程结束 (3S/"ZE //int count = 0; J*k=|+[ //是否结束while循环 LA3,e (e boolean breakWhile = false; nmAXU!t' ,S K6*tpI ~H."{ while(!bStop) `qEm5+` { |/ 7's' write_nPos(); M& L0n%,y5 Utility.sleep(500); D*b|(Oi breakWhile = true; '\qr=0aW FX%E7H :jCaDhK for(int i=0;i<nStartPos.length;i++) JG$J,!.\ { vIv3rN=5vB if(!fileSplitterFetch.bDownOver) rI$10R$+H { /v<8x?= breakWhile = false; 2,`mNjHh break; ;hp; Rd } 'KrkCA } cMKh+r if(breakWhile) 5Uz(Bi break; Qc/J"<Lx +#9 (T
LLN^^>5|l //count++; msJn;(Pn //if(count>4) ioQlC4Y // siteStop(); G*V
7*KC } NsK >UJ' nr6U>
KR^ jl7-"V>j?; System.err.println("文件下载结束!"); KL{uhb0f } &WS%sE{p_ catch(Exception e){e.printStackTrace ();} =i<(hgD } )^3655mb 1 .CYs< G9%4d;uFT //获得文件长度
fQ) ;+ public long getFileSize() wEqCuhZ { 6f1Y:qK'@ int nFileLength = -1; (b5af_ c try{ >@W#@W*I@ URL url = new URL(siteInfoBean.getSSiteURL()); KLB?GN?Pb HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ax }Xsk_ httpConnection.setRequestProperty("User-Agent","NetFox"); ]P5u:~U BGOI YkbLf#2AE| int responseCode=httpConnection.getResponseCode(); KO7cZME if(responseCode>=400) bBL"F!. { \6L=^q= processErrorCode(responseCode); P40eK0e6 return -2; //-2 represent access is error v-@@>?W- } j$Co-b1 rZ7 Ihof %&NK|M+n String sHeader; *?\Nioii <#Dc(VhT T9yW# . for(int i=1;;i++) %UhF=C {
c7 -j //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); |&.)_+w //Utility.log(in.readLine()); 4T-AWk sHeader=httpConnection.getHeaderFieldKey(i); l"Q8` if(sHeader!=null) \U8Vsx1tl { 2q bpjm if(sHeader.equals("Content-Length")) (6b%;2k
{ w0SgF/"@ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); z9ZAY!Zhq] break; nz+KA\iW } S{06bLXU" } 4v7RX else ujedvw;sO break; (Nf.a4O } it@s(1EO# } &,xM;8b catch(IOException e){e.printStackTrace ();} x~.U,,1 catch(Exception e){e.printStackTrace ();} Zl*!pQ ~heF0C_ bzS [X Utility.log(nFileLength); a gzG YXEZ&$e' ycN_< return nFileLength;
I._=q } a;sZNUSn ?u|g2!{_ >F
v8 - //保存下载信息(文件指针位置) AseY.0 private void write_nPos() {cFei3'q { dLq!t@?iu> try{ <Lt$qV-# output = new DataOutputStream(new FileOutputStream(tmpFile)); "lt[)3* output.writeInt(nStartPos.length); PE>_;k-@k for(int i=0;i<nStartPos.length;i++) 5s9~rm { qZ.\GHS // output.writeLong(nPos); 9"e!0Q4 0 output.writeLong(fileSplitterFetch.nStartPos); Y|L57F output.writeLong(fileSplitterFetch.nEndPos); wl4yNC } S/|8'x{< output.close(); ]Yy
Sf } D3OV.G]` catch(IOException e){e.printStackTrace ();} @\a- = catch(Exception e){e.printStackTrace ();} X"]ZV]7(]s } 'n=D$j]X ?.H*!u+9> m,b<b91 //读取保存的下载信息(文件指针位置) ~[{| s') private void read_nPos() 9azPUf)
C { J.*=7zmw try{ w~`P\i@ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ZJqmD int nCount = input.readInt(); R!=XMV3$PH nStartPos = new long[nCount]; >8##~ZuF+ nEndPos = new long[nCount]; v3B
^d}+. for(int i=0;i<nStartPos.length;i++) /[p4. FL { ?w+T_EH nStartPos = input.readLong(); Hs9uDGWp nEndPos = input.readLong(); R B!g,u } sQkP@Y input.close(); [,c>-jA5 } NTC,Vr\A catch(IOException e){e.printStackTrace ();} PSE![whK catch(Exception e){e.printStackTrace ();} 7?4>' } Ni`qU(I'| 1/ HofiIa Je'$V%{E private void processErrorCode(int nErrorCode) KK?}`o { n1ICW 9 System.err.println("Error Code : " + nErrorCode); @'QB rE } 7Vi[I< * ZO,]h9?4 _Cs.%R!r //停止文件下载 -(jcsqDk public void siteStop() $_y"P { $I'ES#8P6 bStop = true; u=4Rn
for(int i=0;i<nStartPos.length;i++) })" : F fileSplitterFetch.splitterStop(); >y?$aJ8ZV <K43f#% Bn.8wMB } l}m@9 ~oC } 8WvT0q>] //负责部分文件的抓取 }\@*A1*X2 **FileSplitterFetch.java ~Oq(JM
$M */ )9*WmF c+# package NetFox; *]LM2J 5b&'gd^d 30<^0J.1 import java.io.*; bV"0}|A~K import java.net.*; YRK4l\_` =hA/; /q=<OEC public class FileSplitterFetch extends Thread { ^71sIf;+ )3 ;S;b $V[ob String sURL; //File URL 9]Y@eRI< long nStartPos; //File Snippet Start Position UZyo:*yB long nEndPos; //File Snippet End Position O_E[FE:+ int nThreadID; //Thread's ID {AZW."? boolean bDownOver = false; //Downing is over *+b[v7 boolean bStop = false; //Stop identical Zffzyh FileAccessI fileAccessI = null; //File Access interface yEH30zSt @A:Xct /h_BF\VBs public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException n@*NQ`(_ { 0j*8|{| this.sURL = sURL; WPPmh~: this.nStartPos = nStart; g;-CAd5 this.nEndPos = nEnd; H]SnM'Y nThreadID = id; 7&X^y+bMe6 fileAccessI = new FileAccessI(sName,nStartPos);//定位 9N9;EY-U } k]v a hgm`6TQ Uu
G;z5 public void run() N(D_*% 96 { mF
"ctxE while(nStartPos < nEndPos && !bStop) ;&iQNXL { [g<JP~4] /vBp Rm HxkhlNB try{ spJB6n( URL url = new URL(sURL); #q%&,;4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); c(o8uWn httpConnection.setRequestProperty("User-Agent","NetFox"); YYhRdU/g String sProperty = "bytes="+nStartPos+"-"; GSypdEBj+w httpConnection.setRequestProperty("RANGE",sProperty); Pd>hd0!.% Utility.log(sProperty); <@oK^ja 2 Y%$6NX A;h~Fx6s InputStream input = httpConnection.getInputStream(); :}Z+K*%o- //logResponseHead(httpConnection); ,9=a(j" !fZxK CsQ 8NpQ"0X byte[] b = new byte[1024]; :=-h'<D int nRead; =>4,/g3 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 'peFT[1>( { Yk:\oM nStartPos += fileAccessI.write(b,0,nRead); >I+O@ //if(nThreadID == 1) NJ3b Oq // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Pj^6.f+ } a6[bF 'y@0P5[se #*5A]"k Utility.log("Thread " + nThreadID + " is over!"); m,'u_yK bDownOver = true; gQ&FO~cr //nPos = fileAccessI.write (b,0,nRead); w!h!%r } [ $B catch(Exception e){e.printStackTrace ();} @zE_fL } CB|Z~_Bm } gVA$P KN5.2pp [}.OlR3) //打印回应的头信息 ]GRPxh public void logResponseHead(HttpURLConnection con) nNf/$h#;O { o: qB#8X for(int i=1;;i++) \T>f+0=4 { \!`*F:7]- String header=con.getHeaderFieldKey(i); gJ :Z7b if(header!=null) jytfGE: //responseHeaders.put(header,httpConnection.getHeaderField(header)); ZfS-W&6Z Utility.log(header+" : "+con.getHeaderField(header)); {,,w5/k^ else 6:@tHUm break; uS3J^=>@(a } [@Y?'={qE } 7|*|xLrVY bq]af.o* 0Bb amU public void splitterStop() N_h)L` { 2UA h^i-^ bStop = true; flnoK%wi } RaKL KZn s@Y0"
Q@nxGm } 1jO/"d.8n Za5*HCo Gw$U0 HA[, /* o^biO!4, **FileAccess.java 0fwo8NgX *//文件访问(定位,写) T-uI CMEf package NetFox; 5_#wOz0u$ import java.io.*; Y ~xcJH c=h{^![$ \f05(ld public class FileAccessI implements Serializable{ o=7 -&F. _=}Efy7 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 t /1KKEZM RandomAccessFile oSavedFile; }hhDJ_I5M long nPos; V\Cu|m&HI Sm{idky)[ ["kk.*& public FileAccessI() throws IOException uveTx { AKejWh this("",0); {O[a+r.n } N.l+9L0b 7&qunK' KYZ/b8C public FileAccessI(String sName,long nPos) throws IOException ]W]o6uo7 { m6bAvy]3<t oSavedFile = new RandomAccessFile(sName,"rw"); = ;4cDmZh this.nPos = nPos; \IQf| oSavedFile.seek(nPos); %[l5){:05 } b[%sKl +' QX` ez@`&cJ7 public synchronized int write(byte[] b,int nStart,int nLen) ML9ZS
@ { /z.Y<xOc int n = -1; bODCC5yL try{ [8v v[n/ oSavedFile.write(b,nStart,nLen); sFsp`kf n = nLen; =]K;" } @Xts}(L catch(IOException e) P{h;2b{ { Mpzt9*7R e.printStackTrace (); Usx8
U } N`h, 2!(j
:?S1#d_ 9@9(zUS| return n; !?,7Cu.5#6 } |@`F!bnLr d,tGW %wzDBsX } _
fJ5z 8M<q-sn4B d="Oge8 /* Dp3&@M"^yY **SiteInfoBean.java <l opk('7 */ P-o/ax package NetFox; U-&dn%Sq |3<tDq@+ gdPv,p19L public class SiteInfoBean { R*|y:T,H q$L=G >x]b"@Hkw private String sSiteURL; //Site's URL CoO.. private String sFilePath; //Saved File's Path gi\2bzWkbX private String sFileName; //Saved File's Name S~X&^JvT private int nSplitter; //Count of Splited Downloading File ~)xg7\k M=:!d$c
,@!io public SiteInfoBean() {]BPSj{B {//nSplitter的缺省值为5 ek\8u`GC //default value of nSplitter is 5 +i HZ* this("","","",5); z~f Zg6 } a~ sU :Aj8u\3!@ GrPKJ~{6 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter)
ieo Naq { HI&N&a9C sSiteURL= sURL; xMsSZ{j%5 sFilePath = sPath; .$&mWytw= sFileName = sName; =;Ap+} this.nSplitter = nSpiltter; s&&8~
)H 5-qk"@E W ;\-f7!s } O=m_P}K v%a)nv utOATjB.z public String getSSiteURL() pn"TFapJA { Sp/t[\,' return sSiteURL; r{2V`h1/| } cBcfGNTJ~ 9n9Z t~_vzG public void setSSiteURL(String value) ggn C #$ { >1uo5,wrF sSiteURL = value; 9bu}@#4* } K
?uHAm
h.T]J9;9 q9+`pj public String getSFilePath() X%JQ_Z { 3<F\5| return sFilePath; .Z?@;2<l } T<XGG_NOl 3mef;!q 8[v9|r public void setSFilePath(String value) y950Q%B] { GO&~)Vh&7 sFilePath = value; b^s978qn# } >I*)0tE ={g.Fn(_ t"# .I?S0 public String getSFileName() <9f;\+zA { *~Y$8!ad return sFileName; r7|_Fm Qf } O2;iY_P7lV _EHz>DJ9 /Uxp5 b h public void setSFileName(String value) y0}3s)lKv { fhwJ sFileName = value; D@W[Nd5MJ } k65V5lb _"0, KYw~(+gHv2 public int getNSplitter() 0c}pg:XT { t .\<Q#bN# return nSplitter; Cj/J&PDQ } ^lvYj
E bqPaXH
n lK VV*RR} public void setNSplitter(int nCount) <[l0zE5Z8' { !m {d6C[ nSplitter = nCount; 1Jm'9iy3 } E^s<5BC; } o,NTIh ccR#<Pb6q kz!CxI ( /* 9Gh:s6 **Utility.java +4
W6{` */ 3bsuE^,.@ package NetFox; u B~C8} )70i/%}7 reP)&Fo public class Utility { pZxuV(QP` bT>1S2s 2|a5xTzH public Utility() #3~hF)u&/ { |7CFm C(Cuk4K y@Gl'@-O } ^QG;:.3v h4,g pV>t //线程睡眠 q9
SV<qg public static void sleep(int nSecond) ~7 w"$H8 { kO3N.t@n try{ )swu~Wb}U@ Thread.sleep(nSecond); X;/5Niv32q } e0Jz|?d= catch(Exception e) `*Ju0)g1 { 1Zo"Xb e.printStackTrace (); 8pXului } /LK,:6 } 2%Mgg,/~ $-w&<U$E //日志 "7z1V{ ;Y public static void log(String sMsg) /_(q7:<ZF { w;p~|! System.err.println(sMsg); alp}p } P:OI]x4 k>.n[`>$6| $n#NUPzG+ public static void log(int sMsg) ^]zC~LfG { ']&rPvkL System.err.println(sMsg); `b:yW.#w3l } Y=5}u&\ } k.n-JS }lQ`ka 4\Q
pS /* ix+sT|> **TestMethod.java AZH=r S` */ ]EWEW*'j package NetFox; U(6=;+q I xk+y? MszX9wl public class TestMethod { al1Nmc# hk.vBbhs $8{v_2C){ public TestMethod() y[A%EMd { ///xx/weblogic60b2_win.exe
Q!ReA{ try{ o6ag{Yp SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); #a+*u?jnnL //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); @%b&(x^UD SiteFileFetch fileFetch = new SiteFileFetch(bean); TbQ5 fileFetch.start(); N<e72x } kSUpEV+/ catch(Exception e){e.printStackTrace ();} !(i}FFn{: NpAZuISD! X3zpU7`Av+ } 0`Hr(J`F %8c2d M"\j7( public static void main(String[] args) f=--$o0U~ { lL;SP& new TestMethod(); J/xbMMb
} ad#4W0@S } Oe)B.{;Ph 点击下载更多相关资料
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