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/* D!kv+<+ **SiteFileFetch.java 1;<J] S$$ */ SF2A?L?}+ package NetFox; q1sK:)Hu+ import java.io.*; .%7#o import java.net.*; .
KJEA# r3oAP[+n Ep/4o<N( public class SiteFileFetch extends Thread { s5T$>+
a nS0K&MH6B cg$@x\fJ SiteInfoBean siteInfoBean = null; //文件信息Bean .L[WvAo long[] nStartPos; //开始位置 F
i?2sa long[] nEndPos; //结束位置 je1f\N45 FileSplitterFetch[] fileSplitterFetch; //子线程对象 [pOQpfo\ long nFileLength; //文件长度 ]w.:K*_= boolean bFirst = true; //是否第一次取文件 AAjsb<P boolean bStop = false; //停止标志 +2!J 3{[J File tmpFile; //文件下载的临时信息 %"~\Pu*> DataOutputStream output; //输出到文件的输出流 [Q&{#%M J&w%lYiu5 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) !uLW-[F, public SiteFileFetch(SiteInfoBean bean) throws IOException ;hi+.ng_ { W8j)2nKD siteInfoBean = bean; 'awL!P-- //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); YHN@?}T() tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Q#8}pBw if(tmpFile.exists ()) l\7N R { :9N~wd bFirst = false; u1a5Vtel read_nPos(); ItGi2'} } `T2RaWR4= else %;kr%%t% { VyH'7_aU nStartPos = new long[bean.getNSplitter()]; :IDD(<^9 nEndPos = new long[bean.getNSplitter()]; ;
mF-y,E } dxbP'2~ YXxaD@ _7>$'V{ f^il|Obzl } GGk.-Ew@ Y<M,/Y_ ! qy=4zOOD# public void run()
]5W0zNb* { WUx}+3eWv //获得文件长度 v;"[1w} //分割文件 vt}+d
StUm //实例FileSplitterFetch 8qL*Nf //启动FileSplitterFetch线程 Xk%92Pto //等待子线程返回 Qi`Lj5;\F try{ #4"(M9kf if(bFirst) $6w[h7 { !qPVC\l nFileLength = getFileSize(); YlDui8.N if(nFileLength == -1) /gT$ d2{ { hXdc5 ?i? System.err.println("File Length is not known!"); _#xS1sD } @Y+YN;57 else if(nFileLength == -2) p@] \ N { v
0mc1g+9 System.err.println("File is not access!"); h}fz`ti U } d)F~)}TFM else &
.VciSq6 { o5KpiibFM for(int i=0;i<nStartPos.length;i++) XL>v$7`# { x'_I{$C& nStartPos = (long)(i*(nFileLength/nStartPos.length));
%[0V> } |SC^H56+ for(int i=0;i<nEndPos.length-1;i++) VE5w!of { KCd}N nEndPos = nStartPos[i+1]; %cMX]U } rlr)n\R# nEndPos[nEndPos.length-1] = nFileLength; :&ir5xHS } <4SY'-w } IMLk{y%6 O\;Z4qn2= d;O16xcM/ //启动子线程 GlYNC&,VL fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; -C]RFlV for(int i=0;i<nStartPos.length;i++) y?j#;n 0 { a5jc8S> fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ei)ljvvmHP siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), D+?/MrP nStartPos,nEndPos,i); 4eTfb Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); s>(OK.o fileSplitterFetch.start(); }eh<F^ } 7K3S\oPej // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -b+VzVJZ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Cmg(#$X // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Q!8AFLff4 nEndPos = " + nFileLength); \}Fx'' // fileSplitterFetch[nPos.length-1].start(); r'xZF~}k"~ QPf*!E xo2PxUO //等待子线程结束 heJ I5t, //int count = 0; nN1\ //是否结束while循环 Yy`\??, boolean breakWhile = false; gV@FT|j!i - &u]B$ ! iuDmL while(!bStop) h`n,:Y^++P { >+y[HTf- write_nPos(); rZ`ob x\S Utility.sleep(500); 9r.Os breakWhile = true; *TQXE:vZ[ umZy=KHj ZGgKCCt for(int i=0;i<nStartPos.length;i++) Rd~-.&
{ 9/3gF)I} if(!fileSplitterFetch.bDownOver) xtWQ. { &}:'YK*X breakWhile = false; \'Oi0qo> break; ZHT_o\ } m
"' } /H.w0fu&.S if(breakWhile) 94 58.!3 break; !h3$C\
d-Vttxa6 AsJN~<0h //count++; I3`WY-uv //if(count>4) 5%,5Xe4p // siteStop(); 3V~871:-~ } . 4E5{F{~ ^R- -&{I 6'CZfs\ System.err.println("文件下载结束!"); 2F9Gx;}t5= } ~+w'b7T,= catch(Exception e){e.printStackTrace ();} kt?G\H!} } y%%D=" {FRUB(68b ,aOi:aaZRT //获得文件长度 ^o&3 +s}M public long getFileSize() GJ"S*30 { q6DuLFatc* int nFileLength = -1; \]RPxM:_> try{ Q@]~O- URL url = new URL(siteInfoBean.getSSiteURL()); _8x:%$ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); u#(VR]u\7 httpConnection.setRequestProperty("User-Agent","NetFox"); {Q9?Q? 'J\nvNm Fy:CG6@X int responseCode=httpConnection.getResponseCode(); |a9d]^ if(responseCode>=400)
QOXG:?v\ { q?}
/q processErrorCode(responseCode); >g7}JI& return -2; //-2 represent access is error cmG*" } ]}7FTMGbY y4sKe:@2 |@'/F #T String sHeader; I/YBL 8@;|x2=y ptJ58U$Bb
for(int i=1;;i++) sa 8JN.B { +tO mKY //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); j9Qd
45 //Utility.log(in.readLine()); `pr$l sHeader=httpConnection.getHeaderFieldKey(i); 7#/->Y if(sHeader!=null) a#3+PB# { Ws;S=|9,7~ if(sHeader.equals("Content-Length")) ='r86vq { Ff6l"A5 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); "&h{+DHS break; co!o+jP } s<3cvF< } Hq<Sg4nz else 2J?ON|2M break; 9*s''= } u|]{|Ya'% } FuqMT` catch(IOException e){e.printStackTrace ();} {qxFRi#\k catch(Exception e){e.printStackTrace ();} ."`mh&+` >]b>gc?3 &CP0T:h Utility.log(nFileLength); 2@7f^be O7<- - vG E;PwR return nFileLength; r 0mA } ?\Fo|__ yFt$L'# )?_x$GKY //保存下载信息(文件指针位置) `D
*U@iJ private void write_nPos() _8zZ.~) { T}fH try{ [l~Gwaul> output = new DataOutputStream(new FileOutputStream(tmpFile)); ;MSdTHN" output.writeInt(nStartPos.length); 72Zp%a= for(int i=0;i<nStartPos.length;i++) ~>2DA$Ec { ?
2#tIND // output.writeLong(nPos); X8(H#Ef[ output.writeLong(fileSplitterFetch.nStartPos); aTi2=HL=S output.writeLong(fileSplitterFetch.nEndPos);
kdmmfw } :Q\Es:y output.close(); YoC{ t&rY } Cn\5Vyrl catch(IOException e){e.printStackTrace ();} h>0R!Rl8 catch(Exception e){e.printStackTrace ();} r0MUv}p#|L } :vsBobiJ |:qaF Tt^PiaS! //读取保存的下载信息(文件指针位置) /NE<?t N private void read_nPos() gc5u@(P" { ;Gf,I1d}{ try{ <V`1?9c7D1 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); sY|by\-c int nCount = input.readInt(); aC!e#(q nStartPos = new long[nCount]; BH`%3Mw nEndPos = new long[nCount]; 4k$i:st; for(int i=0;i<nStartPos.length;i++) ;dC>$_P? { rN$U%\.I nStartPos = input.readLong(); <[*%d~92z nEndPos = input.readLong(); <n#phU Q } ; JpsRf! input.close(); >JSk/]" } NY(z3G catch(IOException e){e.printStackTrace ();} 5Q/&,NP catch(Exception e){e.printStackTrace ();} !UzMuGj } 8%+F.r 3bWYRW B|fh 4FNy private void processErrorCode(int nErrorCode) v d{`*|x { ;FQ<4PR$ System.err.println("Error Code : " + nErrorCode); k4HE'WY } S*aMUV& W't?aj I| K^zu{`S //停止文件下载 i>*|k] public void siteStop() wSV}{9}wr% { b-/8R|Mem bStop = true; |qOoL*z for(int i=0;i<nStartPos.length;i++) E*B6k!: fileSplitterFetch.splitterStop(); y3Z\ Y[ -(oFO'Lbg 6np } rT#2'-f } )2pOCAjL2 //负责部分文件的抓取 k vuSE **FileSplitterFetch.java pqT+lai)# */ ]3 KMFV} package NetFox; hRU5CH/! v47S9Vm+ V(6*wQ`& import java.io.*; sxK|0i}6 import java.net.*; tyI!y~-z $`a>y jma `F(ghC public class FileSplitterFetch extends Thread { Rfx}[!<{N c>$PLO^ uc~/l4~N String sURL; //File URL {0(:5% long nStartPos; //File Snippet Start Position av8\?xmo.$ long nEndPos; //File Snippet End Position ^ ,cwm:B@ int nThreadID; //Thread's ID RV=Z$ boolean bDownOver = false; //Downing is over .="/n8B boolean bStop = false; //Stop identical nt:d,H<p FileAccessI fileAccessI = null; //File Access interface w;OvZo| n5NwiSE sC}p_'L public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 78MQoG< { v1j&oA}$. this.sURL = sURL; pzcl@ this.nStartPos = nStart; kq4ii`zi8 this.nEndPos = nEnd; 8mc0(Z@ nThreadID = id; id?B<OM fileAccessI = new FileAccessI(sName,nStartPos);//定位 h>a/3a$g } ~+)sL1lx + g*s%^(E <Pnz$nH:e public void run() pYBY"r { <E&8g[x6 while(nStartPos < nEndPos && !bStop) $sxm MP { [Yyb)Qf L|`(u x
&
ZW
f? try{ v<AFcY URL url = new URL(sURL); h>:eu# HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 3UNmUDl[~ httpConnection.setRequestProperty("User-Agent","NetFox"); >qL-a*w:a String sProperty = "bytes="+nStartPos+"-"; f\vy5'' httpConnection.setRequestProperty("RANGE",sProperty); /\wm/Yx?S Utility.log(sProperty); 2mt
S\bAF {/2
_"H3: |=rb#z& InputStream input = httpConnection.getInputStream(); 3;'RF#VL //logResponseHead(httpConnection); DGJt$o=&@ |Bhj L, GF/!@N byte[] b = new byte[1024]; C[JGt9{Y int nRead; }~O`(mnD}K while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) \2^_v'
>K { L#~z# nStartPos += fileAccessI.write(b,0,nRead); w|G4c^KH //if(nThreadID == 1) 0Q{^BgW // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); oD8X]R,
H } .kqH}{hf "Nh}_jO 7Ap==J{a Utility.log("Thread " + nThreadID + " is over!"); >"|"Gy ( bDownOver = true; ^ fqco9^; //nPos = fileAccessI.write (b,0,nRead); y{#9&ct& } \\(3gB.Gd catch(Exception e){e.printStackTrace ();} L3J .Oh } _0Z8V[ } [9H986= d8Sr,t+ y3Q2d7G //打印回应的头信息 n1Fp$9% public void logResponseHead(HttpURLConnection con) mhi^zHpa { qZB}}pM# for(int i=1;;i++) grZ?F~P8 { Ch0t' String header=con.getHeaderFieldKey(i); gCP f1z if(header!=null) g&?RQ //responseHeaders.put(header,httpConnection.getHeaderField(header)); "V>p Utility.log(header+" : "+con.getHeaderField(header)); J5#shs[M: else 7f_tH_( break; Z` zyEP A } 2 e9lk$ } ,@Ae o9} egn9O iZ;y( public void splitterStop() m[$pj~<\ { %<yH6h*u bStop = true; }HLV'^"k } )Q5ja}-{V |HfN<4NL eZvG } zcCGREe= oeA}b-Ct0 Jf3xK"in /* <c_'(
**FileAccess.java
SUaXm#9 *//文件访问(定位,写) A[8vD</}_ package NetFox; c0.? d] import java.io.*; !McRtxq?~ `Qxdb1>mjY cqZuG}VR public class FileAccessI implements Serializable{ <E1ngG z$b'y;k //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 )Q)H!yin RandomAccessFile oSavedFile; bSm*/Q long nPos; Cp!Qd e 4&}dA^F ZB'ms[ public FileAccessI() throws IOException S*Hv2sl { KlSg0s this("",0); )2g-{cYv } R$M>[Kjn th]pqhl> -,pw[R public FileAccessI(String sName,long nPos) throws IOException !+{$dB>a { hNUkaP oSavedFile = new RandomAccessFile(sName,"rw"); 0oNy this.nPos = nPos; bVW2Tjc: oSavedFile.seek(nPos); 6$x9@x8 } 5$<Ozkj( g?>V4WF T@gm0igW/; public synchronized int write(byte[] b,int nStart,int nLen) Q)%a2s; { |N+uEiJ int n = -1; c?7Wjy try{ OqlP_^Zz7p oSavedFile.write(b,nStart,nLen); BQF7S<O+ n = nLen; "iPX>{'En } r~Vb*~U" catch(IOException e) bX'.hHR { 6[S-%|f e.printStackTrace (); |L%d^m } mj|TWDcj+ <}n"gk1is \\v1\ return n; vQsI^p } Gid6,J WOR H4h9 wpV)y Q^ } v i~NfD@s ~F^7L5d}C BaXf=RsZ /* =P7!6V\f **SiteInfoBean.java [;, Xp/ */ gkMyo` package NetFox; /4%ycr6 bd[%=5 iVAAGZ>am public class SiteInfoBean { H?$gHZPI (GB*+@ :7 OhplI private String sSiteURL; //Site's URL dvPlKLp private String sFilePath; //Saved File's Path ||o :A private String sFileName; //Saved File's Name D{G~7P\. private int nSplitter; //Count of Splited Downloading File zA%$l&QN] "fZWAGDBO\ `R@b`3*%v public SiteInfoBean() o8!uvl}:9 {//nSplitter的缺省值为5 WwAvR5jq //default value of nSplitter is 5 ^rssZQKY[ this("","","",5); ,!Q^"aOT: } j@C*kj;- ]mdO3P ?CO..l public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) D'Y=}I)8Dn { xG~7kj3 sSiteURL= sURL; :WHbwu,L$ sFilePath = sPath; 1vUW$)?X sFileName = sName; =+"=|cQ this.nSplitter = nSpiltter; K3-Cuku 8XhGo2zf y_}jf,b4 } <MzXTy3\ oa2v/P1` Pt[ b;} public String getSSiteURL() L6n<h { 5rlZ'>I. return sSiteURL; s8|Fe_ } @8"cT- (c|Ry[$| =L9;8THY public void setSSiteURL(String value) Wj"GS!5 { ObEp0-^? sSiteURL = value; WR5W0!'Tf } }/g1s71 y vo4 .u Xot2L{EIUE public String getSFilePath() +~f5dJyk` { 1YJ@9 *l return sFilePath; q~G@S2=}0} } 1rGi"kdf %IHra6 3U&rK)F public void setSFilePath(String value) Bl*.N9* { ZP;WXB` sFilePath = value; t^SND{[WcM } gQ=l\/H `~+[pY1r ]5sU =\ public String getSFileName() ]o2 Z14 { W $E Ao+V return sFileName; yR4++yk } _a-At n2;Vrs,<1& B(qwTz 51 public void setSFileName(String value) NK$BF(HBi { =At)?A9[ sFileName = value; "HrZv+{ } .qD=u1{p9 8rpr10;U TT3\c,cs public int getNSplitter() 3&"+)*/ m { r(DW,xoK0 return nSplitter; `PI?RU[g* } f}uW(:f ]Yx& BfdS3VrZ/ public void setNSplitter(int nCount) Xn*>qm { DE!P[$J nSplitter = nCount; 4M*!'sG\ } =q?s B]n } )bR`uV9< 1y7FvD~ v jzAXC^FS /* -@?4Tfl **Utility.java .BrYz:#A */ 23*OuY package NetFox; NkY7Hg0 B> V)6\ w*krPaT3 public class Utility { N`rz>6,k1 6<{XwmM 7 jiy9[ public Utility() *(CV OY~ { TpAso[r bguTWI8bk C jZIBMGc } 6![}Jvu> QM4O|x[
//线程睡眠 @nxpcHj public static void sleep(int nSecond) )POU58$ { Uo=_=.GQ try{ Tjj-8cg Thread.sleep(nSecond); O
2W2&vY
} rYPj3!# catch(Exception e) 0+6=ag% { @\|Fd) e.printStackTrace ();
Wz)@k2 } 2"8qtG`Et } iKA}??5e _<6B.{$\7m //日志 `=19iAp. public static void log(String sMsg) zr^"zcfz& { <P0&!yN System.err.println(sMsg); ?eOw8Rom } Fb<fQIa DQ9}('^ z(Q 5?+P public static void log(int sMsg) IA^*?,AZy { ]@
N::!m System.err.println(sMsg); &*9' 0 } M {Hy=:K+ } JV@b(x` \fJ _, J>Bc-%.Q /* *IIuGtS **TestMethod.java &2,^CG */ Hd?#^X package NetFox; `[F[0fY- QR{>]I ,| ~Pa public class TestMethod { :YM1p&|fS "P8(R OTD<3Q
q public TestMethod() #y*p7~|@ { ///xx/weblogic60b2_win.exe 5m9;'SF try{ _E8doV SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); KhZ\q|5 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); YWhp 4`m SiteFileFetch fileFetch = new SiteFileFetch(bean); 'Oa(]Br[ fileFetch.start(); I;+>@Cn(g< } *s$:"g- catch(Exception e){e.printStackTrace ();} ?9ScKN oL
-udH tLzKM+Ct# } A0 $ds xew s~74L i9v|*ZM" public static void main(String[] args) _l=X?/ { Uu~~-5 new TestMethod(); A O3MlK9t } 36\_Y?zx% } } T&~DVM 点击下载更多相关资料
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