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/* Te :4z@? **SiteFileFetch.java :K#z~#n */ ='p&T|& package NetFox; 6')pM&`t import java.io.*; `RriVYc< import java.net.*; xKZLXQ'e- 7[)IP:I> '%}k"&t$i public class SiteFileFetch extends Thread { ~53uUT|B 2^*a$OJ %( tu< SiteInfoBean siteInfoBean = null; //文件信息Bean wk'12r6=(- long[] nStartPos; //开始位置 UUuB Rtau long[] nEndPos; //结束位置 +wwb+aG6{ FileSplitterFetch[] fileSplitterFetch; //子线程对象 >;9+4C<z0 long nFileLength; //文件长度 ?df*Y5I2 boolean bFirst = true; //是否第一次取文件 NukcBH boolean bStop = false; //停止标志 ("+J*u*kq_ File tmpFile; //文件下载的临时信息 u3Qm"? $` DataOutputStream output; //输出到文件的输出流 )nI}K QJ< ROv(O;.Ty //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) cKb jW public SiteFileFetch(SiteInfoBean bean) throws IOException t\/i9CBn { lO=Nw+'$S siteInfoBean = bean; V2&O]bR //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); )e1&[0 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); +;ILj<!Z7 if(tmpFile.exists ()) 4~bbng { ?c$z?QTMJ bFirst = false; ^5:xSQ@: read_nPos(); ks}J
ke> } zFn!>Tqe else sX :)g>b { 6hW ~Q nStartPos = new long[bean.getNSplitter()]; WaaF;|,( nEndPos = new long[bean.getNSplitter()]; 2EU((Q`>=( } 6w )mo)<X D #`o Exy|^Dr0 nNN~Z'bG } V5ySOgzw, T=NF5kj-= </.9QV public void run() g"F&~y/p { ~g6`Cp` //获得文件长度 !b=jD;< //分割文件 ~o+:M0)} //实例FileSplitterFetch jgz} //启动FileSplitterFetch线程 Zs$Qo->F //等待子线程返回
x+=Ko try{ \E!a=cL! if(bFirst) #jc+2F,+{ { qt.G_fOz nFileLength = getFileSize(); NQFMExg, if(nFileLength == -1) n.323tNY { " 0:&x
n8L System.err.println("File Length is not known!"); T&ECGF;Y/ } >Z\{P8@k0 else if(nFileLength == -2) d"P\ =`+ { N>+s8L.? System.err.println("File is not access!"); G[pDKELL } d,c8ks( else U)PNY { G>>`j2:y for(int i=0;i<nStartPos.length;i++) >`3wEJ"< { |\Zs oA nStartPos = (long)(i*(nFileLength/nStartPos.length)); ?bq S{KF } us_o{ for(int i=0;i<nEndPos.length-1;i++) U@6bH@v5 { xYg G nEndPos = nStartPos[i+1]; \h#,qTE } XVlZ:kz nEndPos[nEndPos.length-1] = nFileLength; }:b6WN;c } )}G?^rDH( } 0c$0<2D% 0B o7EV ?tf/#5t} //启动子线程 5q.d$K | fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; >BDK?YMx for(int i=0;i<nStartPos.length;i++) FLqF!N\G { 6<uJ}3 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 8@}R_GZc siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), +# 38 nStartPos,nEndPos,i); tm"9` Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Qh0tU<jG fileSplitterFetch.start(); /9K,W)h_ } AB.gVw|
4 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
/z0X siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); RSK~<Y@]q{ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", pZYcCc>6& nEndPos = " + nFileLength); {N \ri{| // fileSplitterFetch[nPos.length-1].start(); 9(\eL9^ yX {CV7%O WeqE9@V //等待子线程结束 'T
'&OA //int count = 0; |>Q]q //是否结束while循环 ,vxxp]#5 boolean breakWhile = false; [YGPcGw WT-BHB1 )*b
dG'}
while(!bStop) pBd_BaN { yU e7o4Zm write_nPos(); e d=pRb Utility.sleep(500); s!vvAD;\ breakWhile = true; \NiW(!Z} ?^8CD.| xbN)z for(int i=0;i<nStartPos.length;i++) ]\qbe
{ Eeumi#$Z if(!fileSplitterFetch.bDownOver) 2/T4.[`t { k^JV37;bl breakWhile = false; 0`LR!X break; {.D^2mj| } zq:+e5YT?T } 0ESxsba if(breakWhile) e%Sw(=a break; Q)n6.%V/e P0Q]Ds| gB&8TE~Y //count++; t#fbagTON //if(count>4) 17\5NgB // siteStop(); 0wh4sKm[X } ],?rFK{O }!&Vc f E8Rk
b} System.err.println("文件下载结束!"); Ih&rXQ$ } pG|+\k/B catch(Exception e){e.printStackTrace ();} *2?-6 } y1oQ4|KSI ^`HP&V 2"'<Yk9 //获得文件长度 E1=WH-iA0 public long getFileSize() xw>\6VNt { oHW:s96e int nFileLength = -1; FLb
Q#c\ try{ 1TOT}h5 URL url = new URL(siteInfoBean.getSSiteURL()); ||}k99y + HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3pV^Oe^9 httpConnection.setRequestProperty("User-Agent","NetFox"); o_(@v2G` O/?Lk*r jMpV c
E# int responseCode=httpConnection.getResponseCode(); ;$VQRXq if(responseCode>=400) L/YEW7M { 0xSWoz[i6~ processErrorCode(responseCode); rryC^Vma return -2; //-2 represent access is error *ommU(r8 } 2b[R^O} z-J?x-< #835$vOe String sHeader; \\Z{[{OZ "%mu~&Ga cnm*&1EzV for(int i=1;;i++) Y]9AC { e
hgUp = //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Fm| h3.`V //Utility.log(in.readLine()); q
JdC5z\[ sHeader=httpConnection.getHeaderFieldKey(i); ,4OH9-Q1 if(sHeader!=null) ]"*sp { (>LJv |wn if(sHeader.equals("Content-Length")) oZ/z{` { /^2&@P7 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); wT taj08D break; )zKZ<;#y } 4P>4d + } Dh4EP/=z else 'X$J+s}6& break; si!jB%^ } Qw,{"J } mZ[tB/ catch(IOException e){e.printStackTrace ();} 0tFR.
sS? catch(Exception e){e.printStackTrace ();} jQV.U~25Q 5LkpfmR zFFip/z\ Utility.log(nFileLength); KeGGF]=> Os5Xejh`I |})7\o return nFileLength; >l$qE } 3SeM:OYq]s dw"Tv~ TTfU(w%&P //保存下载信息(文件指针位置) Yu`KHvur private void write_nPos() Hy*_4r {
W`d\A3v try{ m?@0Pf}xa output = new DataOutputStream(new FileOutputStream(tmpFile)); bMrR output.writeInt(nStartPos.length); pO10L`| for(int i=0;i<nStartPos.length;i++) d~>d\K%v { ,WA[HwY- // output.writeLong(nPos); hd'JXKMy output.writeLong(fileSplitterFetch.nStartPos); Mq#sSBE<K output.writeLong(fileSplitterFetch.nEndPos); x+%(z8wD } l)d(N7HME output.close(); 4(hHp6}b } ,lUroO^^ catch(IOException e){e.printStackTrace ();} =8p *Ijs catch(Exception e){e.printStackTrace ();} 1Fs:&* = } hE9UWa.Q> QrX 5Kwq *=KX0%3 //读取保存的下载信息(文件指针位置) G|LJOq7QB private void read_nPos() hk7kg/" { s4&JBm(33N try{ E[nJ'h<h DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); gE}+`w/X int nCount = input.readInt(); `nvm>u~[Hq nStartPos = new long[nCount]; &y~~Z [.F, nEndPos = new long[nCount]; HXg#iP^tv for(int i=0;i<nStartPos.length;i++) z+=wql*Eo { 6z-&Zu7@ nStartPos = input.readLong(); KJLC2, nEndPos = input.readLong(); 4Gsbcl{ } B.T|e,g26 input.close(); +YNN$i } i+Fk catch(IOException e){e.printStackTrace ();} h%0FKi^ catch(Exception e){e.printStackTrace ();} ,iy;L_N } Z'V"nhL y?}R,5k ]rY3bG'& private void processErrorCode(int nErrorCode) zfBaB0 P { q' System.err.println("Error Code : " + nErrorCode); h=7eOK] } `+c8;p'q _ft)e3Gf 'y?
HF@NJ //停止文件下载 KsG>,#
Q public void siteStop() sZ7RiH+I { /BaXWrd+ bStop = true; {<k}U;uiO for(int i=0;i<nStartPos.length;i++) p&O-]o8 fileSplitterFetch.splitterStop(); [? 1m6u; YZHqy++x /yd<+on^ } B'U;i5u4' } AgU 7U/yk //负责部分文件的抓取 B|zVq=l~ **FileSplitterFetch.java h]w5N2$}? */ qbunP! package NetFox; -gzY~a jwW6m@+
L>PPAI import java.io.*; %(v<aEQtt import java.net.*; @9}SHS
!vQDPLBL n#fc=L1U public class FileSplitterFetch extends Thread { Rc.8j,] x#0B
"{ Q|1X|_hs String sURL; //File URL E{#Y= long nStartPos; //File Snippet Start Position >.}ewz&9o long nEndPos; //File Snippet End Position oKlO cws} int nThreadID; //Thread's ID NW*qw q boolean bDownOver = false; //Downing is over
(r!d4 boolean bStop = false; //Stop identical NU#rv%p FileAccessI fileAccessI = null; //File Access interface ;<~lzfs
B;6N.X(K @?gN
&Z)I public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException iJsa;|2/ { ^;xO-;q this.sURL = sURL; *]uj0@S this.nStartPos = nStart; (d@ = this.nEndPos = nEnd; 1 xu2$x.b nThreadID = id; {zj<nu fileAccessI = new FileAccessI(sName,nStartPos);//定位 -g6C;<Y } {W5D) KDW=x4*p TXDb5ZCzM public void run() j1hx{P' { CNRiK;nQ while(nStartPos < nEndPos && !bStop) [ ]LiL;A& { "p[FFg VJ'bS9/T N:yyDeGyW try{ 9tZ+?O5 URL url = new URL(sURL); 5%Xny8
]|D HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (qky&}H httpConnection.setRequestProperty("User-Agent","NetFox"); r!,/~~mT String sProperty = "bytes="+nStartPos+"-"; $>M A httpConnection.setRequestProperty("RANGE",sProperty); 3~uWrZ.u Utility.log(sProperty); A8by5qU r:n-?P Hswgv$n InputStream input = httpConnection.getInputStream(); 9"RGf 1] //logResponseHead(httpConnection); Jc74A=sT U if61)+!i B<A=U r byte[] b = new byte[1024]; nRL2Z5iO- int nRead; W2CQk while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) %!_%%p,f { "k%B;!We) nStartPos += fileAccessI.write(b,0,nRead); _);;@T //if(nThreadID == 1) n;5;D // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); `=B0NC.3 } j & x=?jX ]*Tnu98G} =C[2"Y4JK0 Utility.log("Thread " + nThreadID + " is over!"); Nsd7?|@HI bDownOver = true; 5csqu^/y //nPos = fileAccessI.write (b,0,nRead); 6'^Gh B } g\n0v~T+ catch(Exception e){e.printStackTrace ();} B&Igm<72x } my|UlZ(qg } )U':NV2 1sHaG =yZiBJ //打印回应的头信息 01-n_ $b public void logResponseHead(HttpURLConnection con) nnm9pnx { UJX=lh.o for(int i=1;;i++) :.k)! { \;%DDw String header=con.getHeaderFieldKey(i); UFED*al# if(header!=null) !UV/p"CfX //responseHeaders.put(header,httpConnection.getHeaderField(header)); )&$Zt( Utility.log(header+" : "+con.getHeaderField(header)); "
~X;u8m else vMQvq9T} break; > 10pk } .vbUv3NI } p7YfOUo
k 51\N+ ]("5O V5 public void splitterStop() wv ~?<DF { yye(^ bStop = true; )7j CEA03 } M-B - Yiq8>| s=uWBh3J } h{sY5d'D LE"t'R Y.<&phv /* p^s k?E **FileAccess.java )L%i"=<Bdy *//文件访问(定位,写) \AT]$`8@_ package NetFox; fy(i<L
Z import java.io.*; nO d'$q DsY$ JmR)
g public class FileAccessI implements Serializable{ \"r*wae y+C.2 ca //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 8w[nY.#T RandomAccessFile oSavedFile; g7|$JevR0 long nPos; r:&"#F 77Fpb?0` iSZiJ4AUq public FileAccessI() throws IOException l/JE}Eg( { zMXlLRC0 this("",0); :IZ(9=hs } ?rD`'B Ifc}=:nr l{{wrU` public FileAccessI(String sName,long nPos) throws IOException
,a$?KX
{ kUdl2["MZ oSavedFile = new RandomAccessFile(sName,"rw"); nA\9UD<G. this.nPos = nPos; ~[mAv#d&i oSavedFile.seek(nPos); as{^~8B } 1xJc[q 4+V+SD %>cl0W3x public synchronized int write(byte[] b,int nStart,int nLen) B~/LAD_ { _V9 O,"DDc int n = -1; tkG0xRH try{ bs%lMa.o oSavedFile.write(b,nStart,nLen); }Ot
I8;> n = nLen; G$5N8k[2 } O>E2G]K]\ catch(IOException e) $hkMJ),T~ { $=c79Al( e.printStackTrace (); CZ/bO#~ } T/_JXK>W Y!kz0([ *hHy>(* return n; Q/%(&4>'y } EzDj,!!<w `J>76WN ;?y*@*2u } vFK&63 7H-,:8 P~)ndaQ /* <&?gpRK **SiteInfoBean.java GnE%C2L- */ R?Dbv'lp> package NetFox; ~ E)[!y )Tc eNH .oJs"=h:m public class SiteInfoBean { cm8-L[>E 7-oH >OF^ rpgr5> private String sSiteURL; //Site's URL 5dVSir private String sFilePath; //Saved File's Path brkR,(#L3 private String sFileName; //Saved File's Name 1`tE Hu. private int nSplitter; //Count of Splited Downloading File VK*2`Z1 H:X=v+W 'JBf*p". public SiteInfoBean() FTy`#*7Ul {//nSplitter的缺省值为5 x9#>0
4s //default value of nSplitter is 5 +$#YW5wy this("","","",5); '8NKrI } r@xMb,!H ob v5|X=B>&> public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) $XqfwlUu/4 { @)8QxI^3[ sSiteURL= sURL; h^P>,dy0 sFilePath = sPath; g<[_h(xDeG sFileName = sName; <ByR!Y this.nSplitter = nSpiltter; zfE;)K^" aW8Bx\q SWjOJjn } 3U&QonCV rSIb1zJ !*:Zcg?7n public String getSSiteURL() u"K-mr#$[o { ~RVx~hh return sSiteURL; J?XEF@?'G } Ve,_;<F]S
H}NW? C7(kV{h$d public void setSSiteURL(String value) j:%~: { @L%9NqE`O sSiteURL = value; R|T_9/#) } )*@Oz D<[4}og&] \A\a=A[ public String getSFilePath() xo0",i
f8 { ,.`";='o return sFilePath; WV5gH*uUa } ex8mA6g P5ii3a?R X6mY#T'fQ public void setSFilePath(String value) |X9YVZC { K1Tq7/N sFilePath = value; `zHtfox! } eR(PY{ J!,5HJh1 ]6{G;f$ public String getSFileName() 29g("(}TK { (=${@=!z return sFileName; t;9f7~ } [R j=k)aBm <CL0@?*i9 D"F5-s7 public void setSFileName(String value) jxL5L[ { Ys10r-kDS sFileName = value; +XU*NAD,! } NYD#I{h [{_JO+)+n 6uQfe?aD public int getNSplitter() 9hI4',(rE { o}p6qB=;1 return nSplitter; YJ]]6 K+ } 3OV#H% xW{_c[oA ^;B
vd! public void setNSplitter(int nCount) 9)sGnD; { 0-EhDGa]r nSplitter = nCount; 5AR\'||u } 4J2NIFZ } MpM-xz~ "A^9WhUpJ Tn[DF9;? /* qFmvc **Utility.java |jW82L+!N% */ -san%H' package NetFox; 7t\W{y A>^\jIB> i% k`/X; public class Utility { 3|%Q{U tv)x(MX v\:>}
<gc public Utility() >Vc_.dR)E { AFL* a* 8ON$M=Ze$ Oh<[8S7]C } RNuOwZ1m ;Gxp'y //线程睡眠 .x$+7$G public static void sleep(int nSecond) >t u3m2 { J'y*;@4l^: try{ 5<Cu-X Thread.sleep(nSecond); y}ez js } E0}`+x catch(Exception e) [i.2lt#] {
N\DEY] e.printStackTrace (); fR!'i):u } R{kZKD= } wQ[~7 ,o nJ.pPzH2g //日志 InMeD[*^ public static void log(String sMsg) DqrS5!C { di`Ql._M System.err.println(sMsg); oddS~lW } L~Epd.,Dt K9}ppgL'$ pox\Gu~.0 public static void log(int sMsg) .Xh ^L { g^"",!J/ System.err.println(sMsg); mgX0@#wFn } /<s'@!W } ROr$S z ;JA2n\iP, I-4csw<Qy /* gIep6nq1`| **TestMethod.java ' A= x */ aDR<5_Yb package NetFox; k&ujr:)5Y5 "m ):" {
dw m>a public class TestMethod { 5NbI Vz Fkj\U^G +wwpaR` public TestMethod() J`;G9'n2 { ///xx/weblogic60b2_win.exe =(K;z9OR try{ L{Epkay,{ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); MOP
%vS //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); e2UbeP SiteFileFetch fileFetch = new SiteFileFetch(bean); Ps7( 4% fileFetch.start(); +w:[By" } Z<K[ catch(Exception e){e.printStackTrace ();} &G5+bUF, %I;ej{*c J6_Hlt } 8vz9o <I yC4JYF]JN I,QJ/sI public static void main(String[] args) @~'c(+<3 { *-T3'beg new TestMethod(); ()v[@"J } {%^q8l4j } gCz^JM 点击下载更多相关资料
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