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/* m!(K **SiteFileFetch.java <{uIB;P */ IQ8AsV&'C package NetFox; /9Xf[< import java.io.*; >?<d}9X import java.net.*; Xw5"JE!. i[J', yRDLg
c public class SiteFileFetch extends Thread { VvKH]>* `#U6`[[ +__Rk1CVh SiteInfoBean siteInfoBean = null; //文件信息Bean S0yT%V long[] nStartPos; //开始位置 uM#/ long[] nEndPos; //结束位置 mQJ GKh&Pk FileSplitterFetch[] fileSplitterFetch; //子线程对象 dGjvSK<1@ long nFileLength; //文件长度 K2Zy6lGOZ boolean bFirst = true; //是否第一次取文件 I*"]!z1 boolean bStop = false; //停止标志 ;'}xD5] File tmpFile; //文件下载的临时信息 B;Vl+}R DataOutputStream output; //输出到文件的输出流 )=@ XF0 \
3N#% //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 3iTjM>+> public SiteFileFetch(SiteInfoBean bean) throws IOException 4F?1,-X { qZG >FC37 siteInfoBean = bean; [Ma9 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ]W,g>91m tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); HDOa N if(tmpFile.exists ()) !5-[kG& { V>Cf
8>m bFirst = false; LX'US-B.! read_nPos(); $'Z!Y;Ue } 0M p>X else ]gZjV { D![Twlll nStartPos = new long[bean.getNSplitter()]; OMU#Sx!6 nEndPos = new long[bean.getNSplitter()]; :nt%z0_ } RZjR d sMK/l @7 B^{DCHu/ sYzG_*) } &V
L<Rx /^"TMm hAdEq$ public void run() *RO ~%g { [A47OR //获得文件长度 CgWj9 [ //分割文件 Pcc%VQN //实例FileSplitterFetch &~8}y+z //启动FileSplitterFetch线程 qsp,Usu/ //等待子线程返回 E7D
DMU try{ -~g3?!+Hb if(bFirst) ;DTNw= { <Jx{Uv nFileLength = getFileSize(); "O`;zC if(nFileLength == -1) ?W(f%/B# { yLP0w^Q System.err.println("File Length is not known!"); M<729M } IP3-lru else if(nFileLength == -2) yY+2;`CH { 6-~ System.err.println("File is not access!"); "?!IPX2\S } b8Qm4 b?:4 else tj0vB]c { 6yU~^))bx for(int i=0;i<nStartPos.length;i++) #LZ`kSlv4 { =
N#WwNC nStartPos = (long)(i*(nFileLength/nStartPos.length)); zV]0S o } pP#?| for(int i=0;i<nEndPos.length-1;i++)
tXx9N_/ { LuVj9+1 S nEndPos = nStartPos[i+1]; a5iMCmL+ } m:t$& nEndPos[nEndPos.length-1] = nFileLength;
1Sy#* } ,rKN/{M! } DCm;dh Z7v~;JzC# }y1M0^M-$ //启动子线程 'coqm8V[% fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; e0TnA
N for(int i=0;i<nStartPos.length;i++) 2a^(8A`7W { VXa]L4jJ9 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 1#V0g Q siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), B.|vmq,u nStartPos,nEndPos,i); d3\8BKp Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); I.>LG fileSplitterFetch.start(); 1L0ku@%t9Y } z(xvt> // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 8P 8"dN[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); $#!~K2$ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", YANEdH`d nEndPos = " + nFileLength); +38t82%YWo // fileSplitterFetch[nPos.length-1].start(); VYwaU^ s-*XAnot R8KL4g-d //等待子线程结束 +%yh@X6 //int count = 0; ps]6,@uyB //是否结束while循环 3B0%:Jj boolean breakWhile = false; ;#
{x_>M g^idS:GtX5 LCG< while(!bStop) _YY)-H { }LRAe3N%8 write_nPos(); I4*N Utility.sleep(500); ^Iz.O breakWhile = true; }XUHP% ?:ZH%R_`a yD KX, for(int i=0;i<nStartPos.length;i++) L=$P { fkYQ3d,` if(!fileSplitterFetch.bDownOver) OV[-m;h| { Zwcb5\Q breakWhile = false; 0K!9MDT}* break; yP-Dj
, } I}:/v$btM } *n47.(a2i if(breakWhile) 97g\nq< break; 'fB `e]_ 1v Thb &qr7yyY //count++; oH;Y} h //if(count>4) #\jPBLc // siteStop(); H0Tt(:.& } T&c[m!}X|t lyV]-w dug RO[ System.err.println("文件下载结束!"); PyoLk } 4e:hKv,+4 catch(Exception e){e.printStackTrace ();} qUo(hbp } @f$P*_G A;g[G >J pSAXp#g //获得文件长度 >8VJ!Kg4 public long getFileSize() Ua:EI!` { t!~mbx+ int nFileLength = -1; cr!I"kTgD try{ QEVjXJOt0 URL url = new URL(siteInfoBean.getSSiteURL()); R =jK3yfw HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); AkF1Hj httpConnection.setRequestProperty("User-Agent","NetFox"); %8ul}}d9 |`|b&Rhu ;R67a
V, int responseCode=httpConnection.getResponseCode(); 0QPipuP if(responseCode>=400) ed{9UJWh { XH. _Z processErrorCode(responseCode); HqbTJ!a return -2; //-2 represent access is error LP87X-qkjW } Q.N^1?(>k WgIVhj V=c&QPP String sHeader; f="}. ;9^B# aTM Y}Ov`ZM!r for(int i=1;;i++) &8 (2U- { N5s_o0K4TU //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); G6
GXC`^+ //Utility.log(in.readLine()); c" l~=1Dr sHeader=httpConnection.getHeaderFieldKey(i); OS!47Z /q if(sHeader!=null) ]/a?:24 [ { ^cY5!W.q8 if(sHeader.equals("Content-Length")) DJ\lvT#j { ~(^[TuJC nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Ro1l:P)C` break; [)a,rrhj } o;O_N^_W } 9uq|
VU5 else A_g'9 break; -uh/W=Q1R } bXJE 2N
} MF1u8Yl:0 catch(IOException e){e.printStackTrace ();} WcdU fv(> catch(Exception e){e.printStackTrace ();} [Nq4<NK H 95VU" hIdGQKr>V Utility.log(nFileLength); 9KP+ 1rN&Y,61\ O`2%@%?I return nFileLength; 7#RW4ZM } Ghj6&K%b0 ,^'Y7" KL xg //保存下载信息(文件指针位置) \UiuJ+ private void write_nPos() H: U_k68 { "XH]B try{ TEYbB=. output = new DataOutputStream(new FileOutputStream(tmpFile)); 86I".R$d output.writeInt(nStartPos.length); >
4^U=T# for(int i=0;i<nStartPos.length;i++) xv)7-jlx { !is8`8F8 // output.writeLong(nPos); ZpwB"%e$ output.writeLong(fileSplitterFetch.nStartPos); G1D(-X4ALZ output.writeLong(fileSplitterFetch.nEndPos); ?6[>HX; } s2tEyR+gW output.close(); 8g$ 8]'M^T } V9MA)If> catch(IOException e){e.printStackTrace ();} ^awl-CG catch(Exception e){e.printStackTrace ();} f5O*Njl } 0!^{V:DtQ 20J:_+=] "\BLi C //读取保存的下载信息(文件指针位置) 4iKT private void read_nPos() co;2s-X { \=QG6&_ try{ h rZ\ O?j DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Qdtfi1_Y1 int nCount = input.readInt(); ";GLX%C!{@ nStartPos = new long[nCount]; 9eV@v nEndPos = new long[nCount]; = 7jkW (Q for(int i=0;i<nStartPos.length;i++) =]D##R { I*0W\Qz@ nStartPos = input.readLong(); %Jw;c`JM nEndPos = input.readLong(); ;DRJL
} <=0_[M input.close(); ?1[go+56X } \^_F>M catch(IOException e){e.printStackTrace ();} 2\7]EW catch(Exception e){e.printStackTrace ();}
Gjzhgz-- } 7igrRU#1% {yJ{DU?%Y I5-/KVWb private void processErrorCode(int nErrorCode) C[[z3tn { ?.4u'Dkn= System.err.println("Error Code : " + nErrorCode); O/GD[9$i } #$A6s~`B wi&m(f(~ }g`A*y;t //停止文件下载 JiRW|+`pe public void siteStop() {Xl
5F.q { lD{9o2 bStop = true; )`L!eN for(int i=0;i<nStartPos.length;i++) Z3I< fileSplitterFetch.splitterStop(); &3AGj, /at#[Pw~01 H
>RGX#| } JNZKzyJ9K } R^K<u#>K //负责部分文件的抓取 aZmSCi:&' **FileSplitterFetch.java ov?>ALRg */ 7=JiL= package NetFox; :FK(*BUh V+E2nJ ost~<4~ import java.io.*; |vGz
1jLV import java.net.*; D
F0~A 2#sE\D p[W8XX public class FileSplitterFetch extends Thread { 1N2:4|woe d`v]+HK ty(F;M( String sURL; //File URL br0gB3r long nStartPos; //File Snippet Start Position {lqnn n3 long nEndPos; //File Snippet End Position \b'
<q int nThreadID; //Thread's ID bZ0r/f,n$ boolean bDownOver = false; //Downing is over c.NAUe_3 boolean bStop = false; //Stop identical '!Q[+@$ FileAccessI fileAccessI = null; //File Access interface 5<&<61[A 8pPAEf qG~O]($ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException c1Dhx,]ad { 1z*] MYU this.sURL = sURL; 1z{AzpMZ this.nStartPos = nStart; )82x)c<e this.nEndPos = nEnd; n|{x\@VeF nThreadID = id; |3vQmd !2} fileAccessI = new FileAccessI(sName,nStartPos);//定位 * \f(E#wa } ;o#dmG .O~)zMx (3W<yAM+ public void run() [ UQzCqV { *-gS u while(nStartPos < nEndPos && !bStop) + { tV%M2DxS }`>u+iH#a qA&N6` try{ '%)7%O,2 URL url = new URL(sURL); cl^tX% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); c6Wy1d^ httpConnection.setRequestProperty("User-Agent","NetFox"); N=-hXgX^ String sProperty = "bytes="+nStartPos+"-"; UiW(/L httpConnection.setRequestProperty("RANGE",sProperty); Kh3*\x T Utility.log(sProperty); ~,dj)x
3M \9<aCJxN ;Q-(tGd InputStream input = httpConnection.getInputStream(); (%\N-[yZ //logResponseHead(httpConnection); eBG7]u,Q O+c@B}[! m
&s0Ub byte[] b = new byte[1024]; =XyK/$ int nRead; [O9(sWL' while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) )7:2v1Xr] { .}2^YOmd nStartPos += fileAccessI.write(b,0,nRead); C$Ldz=d //if(nThreadID == 1) |f.=Y~aY // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Trm)7B* } 9fyk7~V Fj-mo>" <?QY\wyikz Utility.log("Thread " + nThreadID + " is over!"); hyFq>XFo bDownOver = true; EcFYP"{U //nPos = fileAccessI.write (b,0,nRead); V/<dHOfR\ } $d4eGL2S catch(Exception e){e.printStackTrace ();} iiKFV>;t/ } MiAXbo#\ } ]#TL~u[ 1u'x|Un }G_ i+ //打印回应的头信息 @4_W}1W public void logResponseHead(HttpURLConnection con) G23Mr9m5O { tk2B\}6 for(int i=1;;i++) zZGPA j { SO3WOR`3 String header=con.getHeaderFieldKey(i); { SJ=|L6 if(header!=null) +u:8#!X$RD //responseHeaders.put(header,httpConnection.getHeaderField(header)); *~4w%U4T0 Utility.log(header+" : "+con.getHeaderField(header)); (Sv 7^}j else 2j*\n|"}{ break; 2-. g>'W } a| } NhS0D=v6 VNx}ADXu ] wnN@aO6g* public void splitterStop() C<eeAWP3v { qdjRw#LS^q bStop = true; |C\g 3N- } 3@\vU~=P: ?20y6c < Y:ZI9JK? } lT DF5.aE g=:%j5?.e G]=U=9ZI /* 4cTJ$" v **FileAccess.java 'w^1re=R *//文件访问(定位,写) &B/cy<;y, package NetFox; TJ
;4QL import java.io.*; {y)s85:t RHz'Dz>0 j+88J public class FileAccessI implements Serializable{ )Tpc8Hr tlA4oVII //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 b'St14_ RandomAccessFile oSavedFile; P)tX U long nPos; fI t:eKHr Cx}
Yp- 0@.$(Aqo( public FileAccessI() throws IOException \"<&8 { U3&*,xeU@H this("",0); b^;19]/RW } GKZn|<Y|{c eN,s#/ip] O HR9u public FileAccessI(String sName,long nPos) throws IOException Q{0-pHr} { +[zrU`!@ oSavedFile = new RandomAccessFile(sName,"rw"); !3-mPG<
] this.nPos = nPos; Z>Rd6o' oSavedFile.seek(nPos); L` V6\Ix(I } i/,G=yA d_QHm;}Cx T=ox;r public synchronized int write(byte[] b,int nStart,int nLen) \V7Hi\) { lmz{,O int n = -1; FJ!N)`[ try{ +`yDW N?7 oSavedFile.write(b,nStart,nLen); [t: =%&B n = nLen; XaR(q2s } Fu^^Jex catch(IOException e) #D
.H2'_} { 1Yz1/gFj e.printStackTrace (); 7: J6 F } 9 /t}S6b{ F<Z"W}I+6 Z@t).$ return n; &pZ]F=.r+ }
&j2L-) h}g _;k5R }zlvs
a+ } Q5Y4@ 4Qz +S<2d.&~ /* S;Lqx5Cd **SiteInfoBean.java [
}jSx] */ WN?!(r<qA_ package NetFox; o5BOe1_Pw $QNfy.6Tn 0 -=onX public class SiteInfoBean { P7 (&*=V gG*O&gQY FOquQr1cF private String sSiteURL; //Site's URL f2uog$Hk private String sFilePath; //Saved File's Path ]^8:"Ky' private String sFileName; //Saved File's Name +M-' K19 private int nSplitter; //Count of Splited Downloading File P-7!\[];te RLw=y{%p public SiteInfoBean() v~L} : {//nSplitter的缺省值为5 8{4I6;e- //default value of nSplitter is 5 xZGR<+t this("","","",5); "h2;65@ } 6Ck?O/^ dK|MQ < [0m'a\YE9 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) <saS2.4 { )#xd]~< sSiteURL= sURL; dm8veKW'l sFilePath = sPath; :*0k:h6g sFileName = sName; `vL R;D this.nSplitter = nSpiltter; #y-OkGS
^
bsP:tFw> 0=t_a]+ } AH`tkPd I"Ju3o?u UF,T public String getSSiteURL() dQ/Xs.8 { K4,VSy1byI return sSiteURL; i:qc2#O:J } 0}Kl47}aD {Y`0} qW?^_ public void setSSiteURL(String value) ~AjbF(Ad { [EB2o.EsO sSiteURL = value; 68;,hS*|6 } 4y>G6TD^ ]L}<Y9)t F]M3/M public String getSFilePath() q'C'S#qqn { .zBSjh_=H return sFilePath; #uu wzE*M_ } cM C1|3 + #S]uC d!Y,i!l! public void setSFilePath(String value) <%qbU- { 6CY_8/:zL sFilePath = value; <0JW[m } kIU"-;5tP `\e@O#,^yI 0Zk A.p public String getSFileName() < g6
[mS { i+21t G$ return sFileName; ~Z.lvdA_5 }
M"X/([G 5OpK~f5 k3S**&i!CR public void setSFileName(String value) z4UeUVfZ} { D'uzH|z8 sFileName = value; e-UPu%' } z Lf^O%zN -bZ^A~<O, .$99/2[90 public int getNSplitter() s7a\L=#p( { %z.u
% % return nSplitter; 0DS<( } Rqvm%sAi O2 3f\pm& QVzLf+R~ public void setNSplitter(int nCount) "z@qG]#5 { l}:9)nXA{ nSplitter = nCount; X1tAV>k5'L } ;v8,r#4 } j&Z:|WniK D{a{$Pr :tzCuK?e /* hj0uv6t.c **Utility.java a/>={mbKi */ lFI"U^xC package NetFox; .i[Tp6'%, o6B!ikz 8 sx*(JM}Be public class Utility { s{$c 8 @kI^6(. Jw;J$
u!d public Utility() <
8WS YZ { (_U&EX% N
@]*E lyv9eM } 1)%9h>F7 ?$=N!>P# //线程睡眠 )M'#l<9B public static void sleep(int nSecond) o7]h;Zg5r { w;>]L.n try{ Dve5Ml- Thread.sleep(nSecond); #t3ju^ |? } .\*\bvyCw catch(Exception e) Lrr6z05F Q { 7&m*:
J e.printStackTrace (); >UR-37g{p } "qQU ^FW } aViJ?* h1JG^w$ 5 //日志 @36^4E>h public static void log(String sMsg) M7!&gFv8 { (w"zI! System.err.println(sMsg); d3^LalAp } Ha4?I$'$ F}i rCi47c !Y`nKC(=z public static void log(int sMsg) 36&7J{MU { @: %}clZ System.err.println(sMsg); tEBf2|< } +>c)5Jih } pEhWgCL !Bu<6 |wVoJO!O} /* UI>-5,X **TestMethod.java %oC]Rpdu */ \=,+weGw@ package NetFox; B^{bXhDp v |QFUa` Tje =vI public class TestMethod { H-7*)D lE=Q(QUr ]#S.L' public TestMethod() \p [!@d^ { ///xx/weblogic60b2_win.exe _RY<-B
try{ LdVGFlcXi SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); X-~Q //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ^'v6
,*:4 SiteFileFetch fileFetch = new SiteFileFetch(bean);
YgdoQBQ fileFetch.start(); ,|xG2G6 } URJ" catch(Exception e){e.printStackTrace ();} LNk
3=v2M 1pO ;aG1O q:1 1XPP } 6t/})Xv E(]yjZ/ IO]Oo3 public static void main(String[] args) ckN/_ u3 { %#ms`"H new TestMethod(); /KlA7MH 6 } .- c3f1i } z9;vE7n! 点击下载更多相关资料
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