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/* !:}m-iqQ1 **SiteFileFetch.java SN[ar&I */ 3/]~#y%2 package NetFox; _p^Wc.[~M import java.io.*; _!w69>Nj import java.net.*; J.O{+{&cd KJs`[,;< Kb'4W-&u! public class SiteFileFetch extends Thread { +HgyM0LFg %Z-xh<& u7 <VD SiteInfoBean siteInfoBean = null; //文件信息Bean *uKYrs [ long[] nStartPos; //开始位置
u_FN'p=. long[] nEndPos; //结束位置 BQs\!~Ux2 FileSplitterFetch[] fileSplitterFetch; //子线程对象 !"'6$"U\K long nFileLength; //文件长度 t oM+Bd:Y boolean bFirst = true; //是否第一次取文件 RS@G.| boolean bStop = false; //停止标志 :u)Qs#'29 File tmpFile; //文件下载的临时信息 YHxQb$v) DataOutputStream output; //输出到文件的输出流 :lK8i{o Mq#Hi9SKY //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) .LbAR
u public SiteFileFetch(SiteInfoBean bean) throws IOException "_=t1UE { bXqTc2>= siteInfoBean = bean; 7`^=Ie%(K //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); +I}!)$/ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 0sCWIGUW if(tmpFile.exists ()) }j!C+i { Lg7dJnf bFirst = false; p1T0FBV
L read_nPos(); ~aXJ5sY"f& } ,F+,A].wG else *)vy%\ { R0|4KT-i nStartPos = new long[bean.getNSplitter()]; 7$8DMBqq nEndPos = new long[bean.getNSplitter()]; -M4VC^_ } IIF <Zkpb $if(n|| rX)_!mR y'z9Ya } _94R8?\_V7 Jid_&\ o"kL,& public void run() kv2 H3O { 2Zg%4/u,Zp //获得文件长度 `(6cRT`Wp //分割文件 h8;H<Y;yQ //实例FileSplitterFetch 7|o}m}yVx //启动FileSplitterFetch线程 *?>52 -&b //等待子线程返回 ih|&q try{ 4H{$zMq8 if(bFirst) &2n5m& { GgE
38~A4 nFileLength = getFileSize(); -MORd{GF if(nFileLength == -1) Bw9O)++ { c4s,T"H System.err.println("File Length is not known!"); H;[?8h( } $+,kibk*R else if(nFileLength == -2) R3.8Dr0f { 5,\|XQA5! System.err.println("File is not access!"); PWO5R] } Q9Go}}n else Zv9%}%7p { e2pFX? for(int i=0;i<nStartPos.length;i++) ~NO7@muw { 1O1MB&5% nStartPos = (long)(i*(nFileLength/nStartPos.length)); Ri*mu*r\} } =Ew77 for(int i=0;i<nEndPos.length-1;i++) n;QFy5HB8 { Jyp7+M] nEndPos = nStartPos[i+1]; p[;@9!t } 8~O0P= nEndPos[nEndPos.length-1] = nFileLength; J~h9i=4<bF } O5:[]vIn } Y^XZ.R O:8Ne*L`D e+?;Dc-SJ\ //启动子线程 tJm1Q#|| fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; r?pN-x$M= for(int i=0;i<nStartPos.length;i++) 3-)R' { gf^y3F[\ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), UMHFq- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), b=SCyGxlZ5 nStartPos,nEndPos,i); 6H;\Jt Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (?i4P5s[! fileSplitterFetch.start(); )q[Wzx_ j< } $2a_!/ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6zGeGW siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ]H<}6}Gd // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", V|/N-3M nEndPos = " + nFileLength); ?.c:k;j // fileSplitterFetch[nPos.length-1].start(); 6w_TL<S =%B}8$.| *o<|^,R //等待子线程结束 O>9-iqP>`d //int count = 0; v9Lf|FXo& //是否结束while循环 k4` %.; boolean breakWhile = false; lbh7`xCR /XdLdA!v &3itBQF while(!bStop) zKh <zj { ViUx^e\ write_nPos(); }n
+MVJ;dG Utility.sleep(500); hI*6f3Vn(n breakWhile = true; 'u_j5 W'e{2u TxTxyYd for(int i=0;i<nStartPos.length;i++) T iJ \J{ { gb}ov** if(!fileSplitterFetch.bDownOver) }^*`&Lh { qV-1aaA breakWhile = false; uX6rCokr break; &
sXMB } sXY{g0% } o?aF if(breakWhile) wBEBj7(y break; c4bv Jy8 7Oi<_b gyU=v{]. //count++; +KOhDtLMG //if(count>4) }}Gkipp // siteStop(); '"h}l` } .s|5AC[ q77Iq0VR Pu'lp
O System.err.println("文件下载结束!"); BG6Lky/omz } xFA`sAucr catch(Exception e){e.printStackTrace ();} !yz3:Yzu } ?iL-2I3* EH'eyC-B< ; NO#/ //获得文件长度 H)rJ>L public long getFileSize() c]|Tg9AW { ojVN-*5
int nFileLength = -1; ;)ERxMun try{ v7D0E[)~ URL url = new URL(siteInfoBean.getSSiteURL()); VS65SxHA HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }Q-Tw,j httpConnection.setRequestProperty("User-Agent","NetFox"); c57`mOe/b xX8c>p v2YU2-X[ int responseCode=httpConnection.getResponseCode(); BLm}mb#/{ if(responseCode>=400) X@7:FzU9 { .73sY5hdTN processErrorCode(responseCode); x@x5|8:ga return -2; //-2 represent access is error !"ydl2 } @}'?o_/C ~W3t(\B' I,r0K] String sHeader; .fK~IKA 8mO_dQ c#@L~< for(int i=1;;i++) }$a*XY1 { r/QI-Cf& //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 6HH:K0j3' //Utility.log(in.readLine()); u5`b")a sHeader=httpConnection.getHeaderFieldKey(i); T
^/\Rr if(sHeader!=null) qr~zTBT]
E { P75@Yu( if(sHeader.equals("Content-Length")) *~.'lE%[U { ~x J#NC+ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); CU/Id`"tW break; Q{
{= } A^4#6],%v } #.LI`nYA else Ol;"}3*Z* break; X& XD2o"rt } Q{~;4+ZD } gU?M/i2 catch(IOException e){e.printStackTrace ();} B.);Ju catch(Exception e){e.printStackTrace ();} g$z6*bL +Edq4QYwR w~n+hhMF Utility.log(nFileLength); p#>,{ yXf+dMv W>[TFdH? return nFileLength; vI(CX]o } *QoQ$alHH ~Yre(8+M LDDt=HEY4 //保存下载信息(文件指针位置) GMpg+rK private void write_nPos() Jb)xzUhES {
FWLLbL5t try{ '"6*C*XS output = new DataOutputStream(new FileOutputStream(tmpFile)); 8]4W@~c output.writeInt(nStartPos.length); xk^`4; for(int i=0;i<nStartPos.length;i++) /8/N { ]Bz.6OR // output.writeLong(nPos); HrRw output.writeLong(fileSplitterFetch.nStartPos); V\AF%=6} output.writeLong(fileSplitterFetch.nEndPos); Z0M|Bv9_ } WHRBYq_ output.close(); 02^Nf7DMR }
)t,efg catch(IOException e){e.printStackTrace ();} `mquGk|) catch(Exception e){e.printStackTrace ();} ]zI*}(adu } ;NGSJfn ~^o YPd52* m;vm7]5 //读取保存的下载信息(文件指针位置) V7k!;0u
v private void read_nPos() HUel { ?~oc4J*>( try{ d[p?B-7% DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 0.B'Bvn=s2 int nCount = input.readInt(); m4R:KjN* nStartPos = new long[nCount]; "_\77cqpTh nEndPos = new long[nCount]; 9CZEP0i7 for(int i=0;i<nStartPos.length;i++) i~m;Ah,# { &B$%|~Y5 nStartPos = input.readLong(); d 0:;IUG nEndPos = input.readLong(); sDkO!P } TR:4$92:H input.close(); G6X5`eLQ } i,l$1g-i catch(IOException e){e.printStackTrace ();} YIHGXi<"n catch(Exception e){e.printStackTrace ();} I0_>ryA } Qn@[{%),4 _ujhD (,RL\1zJ private void processErrorCode(int nErrorCode) MO|8A18B { )Zfb M| System.err.println("Error Code : " + nErrorCode); l^__oam } QL-E4] [`1@`5SL- \CYKj_c //停止文件下载 :7s2M public void siteStop() B06W(y,3Q> { 1:q`KkJx bStop = true; nDz.61$[ for(int i=0;i<nStartPos.length;i++) ,
ksr%gR+ fileSplitterFetch.splitterStop(); W'v
o? RVr5^l;" 1\/^X>@W{ } k%;oc$0G-3 } 7<LCX{Uw //负责部分文件的抓取 K>#QC **FileSplitterFetch.java tl=e! */ D+Z2y1 package NetFox;
$qiM_06 <qBM+m$|) xqv&^,ic import java.io.*; #eKH'fE import java.net.*; 5#dJga/88 ZUl-&P_X n -xCaq public class FileSplitterFetch extends Thread { _DYe<f. Pt/F$A{Cj b\UE+\a& String sURL; //File URL )vGxF}I3 long nStartPos; //File Snippet Start Position O*>`md?MH long nEndPos; //File Snippet End Position perhR!#J int nThreadID; //Thread's ID 9e;:(jl^ boolean bDownOver = false; //Downing is over pR!m boolean bStop = false; //Stop identical |Pv)&'B" FileAccessI fileAccessI = null; //File Access interface k:z)Sw "XU)(<p U(hIT9 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException c7]0>nU; { 9x#Tj/5% this.sURL = sURL; .cr<.Ov this.nStartPos = nStart; zOYG`:/' this.nEndPos = nEnd; <ti,Wn. nThreadID = id; 9r 5( fileAccessI = new FileAccessI(sName,nStartPos);//定位 2F/oWt|w? } NH+N+4dEO :b,An'H `KieN/d% public void run() s@*i { {O4&HW% while(nStartPos < nEndPos && !bStop) U XOf { %kuUQ%W1 Pje1,B q jPs{Mr< try{ 6h1pPx7zU URL url = new URL(sURL); K}p0$Lc HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); P}he}k&IR httpConnection.setRequestProperty("User-Agent","NetFox"); C-&s$5MzGb String sProperty = "bytes="+nStartPos+"-"; \cHFV httpConnection.setRequestProperty("RANGE",sProperty); _:KeSskuO Utility.log(sProperty); {`9J8qRY
N,&bBp S>d7q InputStream input = httpConnection.getInputStream(); )gk
tI! //logResponseHead(httpConnection); UryHte 5YXMnYt9 ,hCbx#h byte[] b = new byte[1024]; M`?ATmYy int nRead; )!'7!" $ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Rpxg
5 { {#z[iiB nStartPos += fileAccessI.write(b,0,nRead); +a^0Q
F-7 //if(nThreadID == 1) 1+xi1w}3a // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [=>[ 2Ty } 27Vx<W CW,|l0i D 75;Y;E Utility.log("Thread " + nThreadID + " is over!"); \OkJX_7 bDownOver = true; E4<#6q //nPos = fileAccessI.write (b,0,nRead); g+-^6UG } dlMjy$/T catch(Exception e){e.printStackTrace ();} ESuP ZB } '2SZ] } U}GO* + _!%@V= 5qkyi]/U8 //打印回应的头信息 ',I$`h public void logResponseHead(HttpURLConnection con) vQ>8>V { Lv
*USN for(int i=1;;i++) SGpe \P ]k { [>lQiX String header=con.getHeaderFieldKey(i); &H2j3De if(header!=null) \+<=O` //responseHeaders.put(header,httpConnection.getHeaderField(header)); d26#0Gt-4i Utility.log(header+" : "+con.getHeaderField(header)); e/$M6l$Q*4 else ONLhQJCb break; `*cJc6 } :e\M~n+y } Z.N9e k-sBf Jy\ 9} ]C public void splitterStop() _OB^ywHn. { q'%!qa+ bStop = true; a4",BDx } Vr #o]v 7/dp_I}cO b6'ZVB } |pE
~ X rut[)H . Fm| $x /* q0@b d2} **FileAccess.java \psO$TxF= *//文件访问(定位,写) fF.+{-. package NetFox; +B4 i,]lCx import java.io.*; R[H#av \M~uNWv| R_#k^P^ public class FileAccessI implements Serializable{ ,n$HTWa@0 9<5ii //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 h#uk-7 RandomAccessFile oSavedFile; Cm-dos long nPos; h2
>a_0" MF+F8h>/ x/%/MFK)>8 public FileAccessI() throws IOException _;:B@Z { j{HIdP this("",0); ;kD
Rm'( } 0I*{CVTQj ;>Z0e`= vH6.;j'^ public FileAccessI(String sName,long nPos) throws IOException TU9$5l/;g { N'?#g`*KW oSavedFile = new RandomAccessFile(sName,"rw"); K\5/ ||gi this.nPos = nPos; TZarI-A oSavedFile.seek(nPos); S*H
@`Do%d } +aOX{1w >vNE3S_ K pmq C$ public synchronized int write(byte[] b,int nStart,int nLen) s2 $w>L { 2=X.$&a int n = -1; t5EYu* try{ [\=1|t5n~ oSavedFile.write(b,nStart,nLen); }q:4Zh'l! n = nLen; (1%A@4 } c`7 dNx catch(IOException e) PsN_c[+ { nsu RG e.printStackTrace (); JC7:0A^ } H)5" <=] Oo9' C%"aj^u return n; Om2w+yU } 66scBi_d ~FnY'F<35 ;V84Dy#b } e,l-}=5*P i_p-|I:hQ a!,X@5 /* n{"a0O **SiteInfoBean.java U Fyk%#L */ iO}KERfU package NetFox; 1}OM"V *4c5b'u =lx~tSiS public class SiteInfoBean { c4}|a1R\= 6Z{(.'Be >&Y\g?Z6G private String sSiteURL; //Site's URL {6>$w/+~ private String sFilePath; //Saved File's Path 0_-P~^A private String sFileName; //Saved File's Name 'v5q/l private int nSplitter; //Count of Splited Downloading File B\+uRiD8w ~g*5."-i ;G*)7fi public SiteInfoBean() ]qiX"<s>~C {//nSplitter的缺省值为5 F:LrQu //default value of nSplitter is 5 igF<].'V this("","","",5); 0*6Q8`I } FPu$N d&\ Tj!rAMQk ~F>'+9?Sn public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) fPG3$<Zr { h79~d%- sSiteURL= sURL; h/*@ML+bB8 sFilePath = sPath; 2g;Id.i> sFileName = sName; i>(TPj| this.nSplitter = nSpiltter; /b410NP5 1+qP7 3a^ uz;eYD } &@'+h*
b @GF3g= a?*pO`<J{ public String getSSiteURL() 3]kN9n{ { >C`#4e?} return sSiteURL; Fm+V_.H/; } %Hu.FS5' #j"GS/y" 5i%\m public void setSSiteURL(String value) m1M6N`f { 6+:;Mb_S sSiteURL = value; 593!;2/@ } ,Uy;jk Ei89Ngp\} 3Qu-X\ public String getSFilePath() T[2<_ nn= { sk@aOv'*( return sFilePath; T75N0/teS } 4K,S5^`Gx m,ur{B8 : M%7|7V<o)^ public void setSFilePath(String value) AsI.8" { JI/iq sFilePath = value; 6#HnA"I2n } 3!i{4/ {"db1Gbfg kA9 k^uR/ public String getSFileName() w7f)v\p { 2%)~E50U return sFileName; @)@tIhw } ){KrBaGa4 o Va[ bl\;*.s' public void setSFileName(String value) :bXTV?#0
{ t|*UlTLm sFileName = value; im
F,8 ' } X,D ]S@ w{GEWD{& kB=5=#s public int getNSplitter() D[{"]=- { VREDVLQT return nSplitter; olK*uD'` } >S%}HSPKq <}F(G-kV6 )M8@|~~ public void setNSplitter(int nCount) zo@,>'m { gBZNO! a,d nSplitter = nCount; .I%B$eH } f4vdJ5pV } Hro)m" 4G RHvA. /bmkt@$-0 /* Sp]ov:]%f **Utility.java Y@+9Ukd/ */ [YJ*zO package NetFox; u\km_e U@:l~xJ OK2\2&G public class Utility { hPUZ{#;n ?"@SxM~\ P@Vs\wAT public Utility() *Zn,v-d { "@rHGxK ".?y!VY \U'*B}Sz } u(JuU/U 7<k@{xI/ //线程睡眠 !>Q{co' public static void sleep(int nSecond) D2zqDo<+; { wd1>L) T try{ SRrp=>w? Thread.sleep(nSecond); nWUau:% } epcvwM/A catch(Exception e) P#"_H}qC* { T7N\b]?j@Y e.printStackTrace (); +y][s{A } Se(apQH } &+GbklUB~ Z1wfy\9c8 //日志 ;XXEvRk public static void log(String sMsg) Uh^j;s\y { WL3J>S_ System.err.println(sMsg); Y>K8^GS } rK4
pYo
?S.LGc ~xc0Ky?8 public static void log(int sMsg) Kc+9n%sp { 5"D\n B% System.err.println(sMsg); Ah
zV?6e } f?"909& } fLV@~T| ][~rk?YY |^#Z!Hp_Y /* 5e2yJ R **TestMethod.java )7Oj */ Z*'_/Grv? package NetFox; z0T6a15f!P qnO/4\qq 5'EoB^`8N~ public class TestMethod { yaAg!mW jjg&C9w T w# ;t$qz} public TestMethod() l!IN #|{( { ///xx/weblogic60b2_win.exe Ub[UB%(T try{ OO;I^`Yn SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); o^u}(wZ{ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); =E&1e;_xlE SiteFileFetch fileFetch = new SiteFileFetch(bean); e(9K.3@{ fileFetch.start(); e{.P2rnh } xP 3>8Y catch(Exception e){e.printStackTrace ();} (dym*_J ^L'<%_#. u#0EZ2># } j0S[JpoF ZOL#Q+U A$TFa:O| public static void main(String[] args) ;\iu*1>Z,& { _ sBFs.o new TestMethod(); D~,iI7ac } TH+TcYqO } CDDEWVd 点击下载更多相关资料
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