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/* ~?l>QP|o **SiteFileFetch.java [T|_J$
; */ Tf[o'=2 package NetFox; #^|"dIZ_M import java.io.*; vumA W* import java.net.*; #9Src\V oHo@rGU 9|y?jb5im public class SiteFileFetch extends Thread { (-'Jf#&X^ %kB84dE > 93I|C| SiteInfoBean siteInfoBean = null; //文件信息Bean WS17DsWW long[] nStartPos; //开始位置 Y
6B7qp long[] nEndPos; //结束位置 QU&LC FileSplitterFetch[] fileSplitterFetch; //子线程对象 >"}z
% # long nFileLength; //文件长度 i@Vi.oc4[ boolean bFirst = true; //是否第一次取文件 fa~4+jx>S boolean bStop = false; //停止标志 U]!~C 1cmw File tmpFile; //文件下载的临时信息 ,E YB
E DataOutputStream output; //输出到文件的输出流 FVi7gg.? Pra,r9h, //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) {,kA'Px) public SiteFileFetch(SiteInfoBean bean) throws IOException ZboY]1L[j { VZ69s{/.B siteInfoBean = bean; PcxCal4 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); >M `ryM2=D tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); W7R`})F if(tmpFile.exists ()) IYZ$a/{P { 3m2hB%SNb bFirst = false; $F^p5EXkc6 read_nPos(); H_ecb;|mP } ix.I) else |2ttdc. { 6;JlA}) nStartPos = new long[bean.getNSplitter()]; j>D[iHrH nEndPos = new long[bean.getNSplitter()]; wtm= } v'fX'/ Dht,!LVb; `dp]N0nz YwYCXFQ| } 8v|?g8e3 2m! T.$ Tj[=E public void run() xfAnZBsVo { g#??Mz //获得文件长度 .=I:cniw\r //分割文件 }{3XbvC //实例FileSplitterFetch BRSOE U\= //启动FileSplitterFetch线程 oQsls9t //等待子线程返回 'h]sq{ try{ at(oepq if(bFirst) ;s$bVGHr { 9/LnO'&- nFileLength = getFileSize(); -FxE!K if(nFileLength == -1) JZc"4qf@OT { d z- System.err.println("File Length is not known!"); RxeyMNd } -c_}^j else if(nFileLength == -2) xzI?'?duC { klUW_d- System.err.println("File is not access!"); _T8o] } dE ,NG)MH else VZo,AP~ { U/p|X) for(int i=0;i<nStartPos.length;i++) ke~S[bL%- { W.|r=
nStartPos = (long)(i*(nFileLength/nStartPos.length)); D(z}c, } z8n=\xL for(int i=0;i<nEndPos.length-1;i++) L5wrc4 { szZ8-Y nEndPos = nStartPos[i+1]; Ei$@)qS/ } *|OP>N nEndPos[nEndPos.length-1] = nFileLength; /kK%}L_D } ?H30 } 0q4E^}iR n91@{U)QJ3 =
nIl$9 //启动子线程 I4Y;9Gg fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; v"Z`#Bi for(int i=0;i<nStartPos.length;i++) rzk]{W { Lt<KRs fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), mW+QJ` 3 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Iz^lED nStartPos,nEndPos,i); >U%:Nfo3 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); q.GA\o fileSplitterFetch.start(); +DpiX&^h } li`4&<WGC // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ^y1P~4w? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); +CQ$-3 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", cW|M4` nEndPos = " + nFileLength); 8Ev,9 // fileSplitterFetch[nPos.length-1].start(); [Y%H8} @a[Y[FS )9PP3" I //等待子线程结束 eG
F{.] //int count = 0; 0}:wM':G //是否结束while循环 u` j9m@` boolean breakWhile = false; 8B|qNf `Yi sy
s6 V? O=A(x m# while(!bStop) %XUV[L} { Y,
?- [] write_nPos(); 0=,vdT Utility.sleep(500); AVR=\ qR breakWhile = true; DXH"`1[- #&oL iz=hZ
wv6rjg:7 for(int i=0;i<nStartPos.length;i++) CSBk { )]W|i9 if(!fileSplitterFetch.bDownOver) G\I DgPj` { s/"l ?d breakWhile = false; / }tMb break; ^kF-mM= } }2 X" } n>5/y
c"/q if(breakWhile) LY? `+/ break; H:x{qS4Si ivi,/~L X
/
{; //count++; LYV\|a{Y //if(count>4) 6Z,j^: B // siteStop(); 5|pPzEA> } %YhM?jMW >h> *fIb|r System.err.println("文件下载结束!"); *It`<F| } R{X@@t9@ catch(Exception e){e.printStackTrace ();} u*:;O\6l } L6jD4ec8 n$})}kj tu%!j}3s //获得文件长度 $
M8ZF(W public long getFileSize() qa!3l b_'M { `62iW3y int nFileLength = -1; P_:~!+W, try{ ":G\ URL url = new URL(siteInfoBean.getSSiteURL()); 'Drz6K_KrP HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); w QnW2)9! httpConnection.setRequestProperty("User-Agent","NetFox"); LKx<hl$O SD=kpf; "'8^OZR int responseCode=httpConnection.getResponseCode(); o/6'g)r* if(responseCode>=400) e2@{Ab { i!U,qV1 processErrorCode(responseCode); x U1](O return -2; //-2 represent access is error ux
7^PTgcO } Te :4z@? ;hcOD4or uv}?8$<\ String sHeader; -76l*=| }0%~x,
oRbG6Vv/ for(int i=1;;i++) ,{tK{XpS { `RriVYc< //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); zt23on2 //Utility.log(in.readLine()); oU`J~6.&S sHeader=httpConnection.getHeaderFieldKey(i); l^ Q-KUI if(sHeader!=null) (C=.&',P { /Mg$t6vM if(sHeader.equals("Content-Length")) h\@\*Xz<v { /%P|<[<
[ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); x_yQoae
break;
D ^Cpgha } {okx*]PIc } ?f{--|V else p}r1@L s break; R}S@u@mOE } MzWVsV } lebwGW,! catch(IOException e){e.printStackTrace ();} ?df*Y5I2 catch(Exception e){e.printStackTrace ();} @'Y^A s_j ?L m,TN%*U! Utility.log(nFileLength); $}* bZ~ Ac'0 bIR&e E return nFileLength; 1F*3K3T { } ";PW#VHC .*3.47O }K8W%h<3S //保存下载信息(文件指针位置) Wvg+5Q private void write_nPos() }ob&d.XZ { .w .`1
g try{ S*5hO) C output = new DataOutputStream(new FileOutputStream(tmpFile)); bJ$6[H-: output.writeInt(nStartPos.length); oXQzCjX_ for(int i=0;i<nStartPos.length;i++) R'#1|eWCa { cU+%zk // output.writeLong(nPos); iFypKpHg~ output.writeLong(fileSplitterFetch.nStartPos); hS?pc<~`# output.writeLong(fileSplitterFetch.nEndPos); ks}J
ke> } d5hYOhO[ output.close(); &m8#^]* } [#}0) catch(IOException e){e.printStackTrace ();} G1vg2'A catch(Exception e){e.printStackTrace ();} FM80F_G^z } )$.::[pNA .d4L@{V 9;L5#/E //读取保存的下载信息(文件指针位置) fs:%L private void read_nPos() \9Z1'W { pr;z>|FgA> try{ &N`s@Ka DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); a___SYl
'K int nCount = input.readInt(); \fk%^1XY nStartPos = new long[nCount]; 91Fx0( nEndPos = new long[nCount]; ;E!(W=]*F for(int i=0;i<nStartPos.length;i++) >l!#_a { ++HHUM nStartPos = input.readLong(); \Y4>_Mk nEndPos = input.readLong(); 3
W%Bsqn } $CXMeY{tOo input.close(); `[&) X } EINjI:/D catch(IOException e){e.printStackTrace ();} hI^Hqv catch(Exception e){e.printStackTrace ();} ^uDNArDmj5 } -_p +4tV h W<fu C`++r> private void processErrorCode(int nErrorCode) _gGI&0(VM { I"4Lma System.err.println("Error Code : " + nErrorCode); f4h|Nn%; } 2NNAsr}L hJ>Kfm p H5iv>H //停止文件下载 N 9.$--X}D public void siteStop() 1;U
`e4" { ;?*`WB bStop = true; =Fd!wkB'{ for(int i=0;i<nStartPos.length;i++) GW29Rj1 fileSplitterFetch.splitterStop(); >R9_; Zs(I]^w;d g}vOp3^ } `2B,+ytW8 } )}G?^rDH( //负责部分文件的抓取 sM4Qu./ **FileSplitterFetch.java {1<XOp#b */ n0nvp@?7bJ package NetFox; @jKiE%OP J#```cB 5)T=^"IHXi import java.io.*; |9Gng`) import java.net.*; &V$qIvN$ o/;kzi o~_ wx public class FileSplitterFetch extends Thread { B;3lF;3` s y ]k u(Y! _ String sURL; //File URL 0L
^WTq long nStartPos; //File Snippet Start Position &yQilyU{V long nEndPos; //File Snippet End Position pZYcCc>6& int nThreadID; //Thread's ID {N \ri{| boolean bDownOver = false; //Downing is over 9(\eL9^ boolean bStop = false; //Stop identical yX {CV7%O FileAccessI fileAccessI = null; //File Access interface j/oM^IY =u*\P!$ .[@TC@W public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException }k`-n32)| {
*tWZ.I<< this.sURL = sURL; Y`O"+Jr this.nStartPos = nStart; |#&{`3$CG[ this.nEndPos = nEnd; d~G, * nThreadID = id; /|kR=
~ fileAccessI = new FileAccessI(sName,nStartPos);//定位 p}b:(QN~m } ,t2yw &gDwsW Ew&pwsQ public void run() $,mljJSQv { GH6 HdZ while(nStartPos < nEndPos && !bStop) 4;rt|X77 { FnoE\2}9 _7)>/YK?}4 q{fgsc8v\ try{ 3? R56$-+ URL url = new URL(sURL); ?yfw3s HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); d(=*@epjR httpConnection.setRequestProperty("User-Agent","NetFox"); s>RtCw3, String sProperty = "bytes="+nStartPos+"-"; i gyTvt! httpConnection.setRequestProperty("RANGE",sProperty); /M0A9ZT[ Utility.log(sProperty); pG|+\k/B 8)NQt$lWp hS( )OY InputStream input = httpConnection.getInputStream(); cl`!A2F1G# //logResponseHead(httpConnection);
@hb K E#0_y4 *VbB'u: byte[] b = new byte[1024]; o \#C#NiT int nRead; jMpV c
E# while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Hv>16W$_ { ;Nd,K
C0k nStartPos += fileAccessI.write(b,0,nRead); <\9M+ //if(nThreadID == 1) =SY`Xkj[ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); S4salpz } h@^d
Vg kn^?.^dVX ~!PaBS3A Utility.log("Thread " + nThreadID + " is over!"); 8iB}gHe9 bDownOver = true; $*KM%M6 //nPos = fileAccessI.write (b,0,nRead); M9t`w-@_w } w@jC#E\ catch(Exception e){e.printStackTrace ();} 4P>4d + } `veq/! } \qo}}I>e mBQp#-1\ y|+n77[Gv //打印回应的头信息 cl'#nLPz; public void logResponseHead(HttpURLConnection con) (FY<%.Pa { d:_3V rRZ for(int i=1;;i++) ]y**ZFA { a%IJ8t+mn String header=con.getHeaderFieldKey(i); k>'c4ay290 if(header!=null) /Cl=;^) //responseHeaders.put(header,httpConnection.getHeaderField(header)); #guq/g$ Utility.log(header+" : "+con.getHeaderField(header)); HgY> M`U else J/{!_M- break; [%1 87dz:D } M?nYplC } ;
*@lH%u qGYru1 (c'kZ9& public void splitterStop() oA;> z { &3:U&}I bStop = true; "lT>V)NB' } KJLC2, k/`WfSM\. ;LhNz ()b } pAY[XN S*D Bzl 1%^d<%,] /* ^gu; **FileAccess.java h=7eOK] *//文件访问(定位,写) 0\X'a}8Bu package NetFox; DH*=IzcJf import java.io.*; -IP 3I $YPQi. )Z.M(P public class FileAccessI implements Serializable{ vrr`^UB2 )yyS59s //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 1f/8XxTB RandomAccessFile oSavedFile; qbunP! long nPos; gT=RJB d=$1Z.] ]ICBNJ public FileAccessI() throws IOException z"*$ . { .%3qzOrN this("",0); &l| :1 } -AX[vTB E~| XY9U36 d$O)k+j public FileAccessI(String sName,long nPos) throws IOException }8\"oA6 { Ze:Y"49S+> oSavedFile = new RandomAccessFile(sName,"rw"); (+=TKI<= this.nPos = nPos; C\d5t4s oSavedFile.seek(nPos); !P"=57d}"l } y~jYGN mm@)uV<\ gL-\@4\wc public synchronized int write(byte[] b,int nStart,int nLen) puPYM" { j1hx{P' int n = -1; S$egsK"~ try{ :87HXz6]jS oSavedFile.write(b,nStart,nLen); ?->&)oAh n = nLen; 5%Xny8
]|D } FhyA_U%/nF catch(IOException e) qt
!T%K { U(t_uc5q e.printStackTrace (); 4t<l9Ilp } %w0Vf$ U}]uPvu <s737Rl return n; MGGc } nRL2Z5iO- TM1D|H _);;@T } F]"Hs> z$q:Yg
Ue8k9%qV /* Nsd7?|@HI **SiteInfoBean.java ji(Y?vhQt */ _H(:$=$Q package NetFox; dAZh# i[ ,svj(HP$ O(Tdn;1 public class SiteInfoBean { '+Gy)@c nYv`{0S+m 1hT!~' private String sSiteURL; //Site's URL z12c9k%s private String sFilePath; //Saved File's Path
E+.%9EKU private String sFileName; //Saved File's Name J|Xu]fg0 private int nSplitter; //Count of Splited Downloading File tHj |_t 5%5z@Ka ^:yg,cS|Be public SiteInfoBean() ~{O9dEI {//nSplitter的缺省值为5 D#~S<>u@ //default value of nSplitter is 5 tUp'cG this("","","",5); xg>AW Q } 0qV"R7TW NSPa3NE I9 R\)3" public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) `iiZ { .$k2.-k sSiteURL= sURL; =:!$'q: sFilePath = sPath; =R>%}5
sFileName = sName; qU1^ K this.nSplitter = nSpiltter; \"r*wae WG_20JdJY A|D]e)/6+B } 9_6.%qj& zP|y3`.52 @"`{gdB$ public String getSSiteURL() ZL-YoMHc+_ { Y\qiYra return sSiteURL; ?8d7/KZO } 5G\CT&cQR CulU?-[i iE|qU_2Y public void setSSiteURL(String value) U~mv1V^. { Cyb-}l sSiteURL = value; vlD!YNy } yvgn}F{} g*NKY`, ?Q`Sx public String getSFilePath() M=n_;3,o { ohdWEU, return sFilePath; ,=9e]pQ } l#FW#`f &?@gUk74" hm%'k~ public void setSFilePath(String value) GnE%C2L- { #nE%.k|R~ sFilePath = value; fwojFS.K } 3sk$B%a>Z m\h/D7zg s_=/p5\ public String getSFileName() u7=jtB { ?Jlz{ms I return sFileName; .qyk [O } -}lcMZY -$(,&qyk 1@nGD<,. public void setSFileName(String value) _jw A_ { )
0x*>;"o sFileName = value; LF'M!C9| } web=AQ5I4 U}xQUFT| 62B` Z5j# public int getNSplitter() E6SGK,f0D { O jkbv return nSplitter; +e0]Y8J{ } YC:>) 4]N`pD5 Ve,_;<F]S public void setNSplitter(int nCount) G
.~Psw# { uf*sI nSplitter = nCount; R|T_9/#) } _/"m0/, } vgzNT4o Y8I$JBO ui4H(A'} /* {m9OgR5U **Utility.java D-.XSIEMu */ =KwG;25hX package NetFox; +[9~ta|j G 3P3 (=${@=!z public class Utility { J{=by]-rD, cO2
.gQo' hu-fwBK public Utility() Hw34wQX { n
5NkjhP~Z S @\Pki+n[ $|!VP'VI } `LL#Ai a 8#S|jBV //线程睡眠 b1>%%# public static void sleep(int nSecond) xtKWh`[& { MpM-xz~ try{ /4j'?hB<g Thread.sleep(nSecond); HoGrvt<:.P } }U'fPYYi8 catch(Exception e) L <Q1acoZm { )'M<q,@<( e.printStackTrace (); *J@2A)ZDv0 } %;9f$:U } DY?`Y%" 6}2vn5 E// //日志 %"j<` public static void log(String sMsg) pL>Q'{7s3 { zt!mx{l' System.err.println(sMsg); Y_S^B)y } b&p*IyJR 'OSZ'F3PV Z=DAA+T` public static void log(int sMsg) DqrS5!C { D M{7x77 System.err.println(sMsg); MuYr?1<q } V{;Mh
u`+ } ?)-*&1cv Afo(! v z?_c:]D /* ^-P lTmT **TestMethod.java p+#J;. */ +"Ek?
)? package NetFox; e2;19bj& $zbm!._~DA 25*/]iu public class TestMethod { =(K;z9OR tTe\#o` EbuOPa public TestMethod() \TkBV?W { ///xx/weblogic60b2_win.exe `4}zB#3 try{ )!hDF9O SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); fXvJ3w( //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Fe%Q8RIh_ SiteFileFetch fileFetch = new SiteFileFetch(bean); TZi%,yK fileFetch.start(); Y(78qs1w } ;2@MPx catch(Exception e){e.printStackTrace ();} [Nr6qxWg }3j/%oN.( q0jzng } G+ Y`65 Erl"X}P .@JXV
$Z public static void main(String[] args) U:c!9uhp { l~AmHw
e new TestMethod(); \=v7'Hp } R0_%M } ;n00kel$ 点击下载更多相关资料
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