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/* Kzz]ZO*3 **SiteFileFetch.java N)N\iad^ */ ";$rcg"%X package NetFox; qZ|>{^a* import java.io.*; @ob4y import java.net.*; ( zL( }[m,HA<j tNbZ{=I> public class SiteFileFetch extends Thread { f hS4Gb_ z6f N)kw ^P
!}" SiteInfoBean siteInfoBean = null; //文件信息Bean K|g+Wt^tQ long[] nStartPos; //开始位置 fkmN?CU{1% long[] nEndPos; //结束位置 5$.e5y<&( FileSplitterFetch[] fileSplitterFetch; //子线程对象 i$:QOMA long nFileLength; //文件长度 M
h5>@-fEE boolean bFirst = true; //是否第一次取文件 A9L
{c!|- boolean bStop = false; //停止标志 ofIw7D*h File tmpFile; //文件下载的临时信息 RNB ha& DataOutputStream output; //输出到文件的输出流 jizp\%W+ }Uc)iNU //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) >p|tIST public SiteFileFetch(SiteInfoBean bean) throws IOException eod-N}o { %
A8dO+W siteInfoBean = bean; /3ty*LQT //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); }4A $j{\ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); pwG" _|h if(tmpFile.exists ()) d2XSw> { ,U^V]jC bFirst = false; 2J5RZg9jL read_nPos(); m0zbG1OE } `rLy7\@; else -U#e { 1L\\](^
3 nStartPos = new long[bean.getNSplitter()]; #2\
0#HN nEndPos = new long[bean.getNSplitter()]; xpjv@P } Q5~Y;0' D?:AHj%gW lZ![?t}2` c. ;}e:)s } zEYT,l mxQPOu fce~a\y0 public void run() r[}5<S Q { ,8^QV3 //获得文件长度 /$NZj"# //分割文件 o+j~~P //实例FileSplitterFetch qe{:9 //启动FileSplitterFetch线程 |}Wm,J //等待子线程返回 ./#F,^F2 try{ "g=g' W# if(bFirst) s}5,<|DL { e0; KmQjG nFileLength = getFileSize(); SZ'2/#R> if(nFileLength == -1) WQ>y;fi5/{ { y>YQx\mK System.err.println("File Length is not known!"); X zF-g*e } yRF
%SWO else if(nFileLength == -2) {InD/l'v6n { ?@uyqi~:U System.err.println("File is not access!"); C0> Z<z } 'l7ey3B% else 4gkaCk{] { U.,_zEbx, for(int i=0;i<nStartPos.length;i++) 6<
T@\E { y/(60H,{{ nStartPos = (long)(i*(nFileLength/nStartPos.length)); ;VI/iwg } mufJ@Y S# for(int i=0;i<nEndPos.length-1;i++) 7j22KQ|EX^ { gfY1:0 nEndPos = nStartPos[i+1]; (m3
<) } PZjK6]N\ nEndPos[nEndPos.length-1] = nFileLength; `1fNB1c
} 9nrmz>es|- } td"D&1eQ@ g&<3Kl ,VdNP //启动子线程 +8#hi5e fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; zOfMKrRG for(int i=0;i<nStartPos.length;i++) aHR&6zj4 { rOyKugHe fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), T}55ZpSC& siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), h.%)RW? nStartPos,nEndPos,i); ^^FqN; Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); I"5VkeIx fileSplitterFetch.start(); 9H6%\#rw } 6hX[5?} // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }S,KUH. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 2QN ~E // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", nQ5N\RAZ nEndPos = " + nFileLength); c ?(X(FQ // fileSplitterFetch[nPos.length-1].start(); 2iV/?.<Z& b\9MM o NqIrYH' //等待子线程结束 h:3^FV //int count = 0; :)eU)r"s4 //是否结束while循环 ]aN]H a boolean breakWhile = false; ~(~
y=M
q0y#Y Fk*C8 while(!bStop) KW 78J~u+ { u4QBD5T" write_nPos(); s-"oT= Utility.sleep(500); (l]_0-Z breakWhile = true; |[B JZ 8uD% |iLf;8_: for(int i=0;i<nStartPos.length;i++) ];63QJU { 'n dXM if(!fileSplitterFetch.bDownOver) ~M?^T$5 { QGoBugU breakWhile = false; .2v)x break; VTIRkC
wl@ } GJo`9 } oT}-i [=} if(breakWhile) :% m56 break; }xG~a=, y|Vwy4tK9 PC55A1(T //count++; 'irHpN6n //if(count>4) nKu)j3o` // siteStop(); nSR<( -j! } I/`\>Hk *ud/'HR8] Y0Bd[ System.err.println("文件下载结束!"); RJ0:O } f~-qjEWm catch(Exception e){e.printStackTrace ();} .;,` bH0 } 2Cgq&\wS NS3qNj
3@8Zy:[8< //获得文件长度 kl[Jt)"4@ public long getFileSize() oa
q!<lI { 4E0 Y= int nFileLength = -1; l37)
Q try{ RJa1pYK URL url = new URL(siteInfoBean.getSSiteURL()); u|EHe"V" HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); vL
]z3 httpConnection.setRequestProperty("User-Agent","NetFox"); e4<[|B!O o)r%4YOL x4^*YZc$, int responseCode=httpConnection.getResponseCode(); qtYVX:M@, if(responseCode>=400) h'|J$ { =OR"Bd:O
processErrorCode(responseCode); cOrFe;8-. return -2; //-2 represent access is error m&{%6 } A=bBI>GEYP {O"N2W :vo#( String sHeader; kB3@;z: 8Luw<Q ,WgEl4 for(int i=1;;i++) M'>8P6O { 7rSads //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 6~.{~+Bd //Utility.log(in.readLine()); S*w; $`Y sHeader=httpConnection.getHeaderFieldKey(i); >4iVVs if(sHeader!=null) 9~ rYLR(v { JK9 J;c#T if(sHeader.equals("Content-Length")) GS&iSjw { ,cCBAOueO nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); )FSa]1t;x break; DC+l3N } c6~<vV'} } 1 Q6~O2a else R!y`p:O
C break; ka?EXF: } K bM1b } o|bm=&f catch(IOException e){e.printStackTrace ();} FQqk+P! catch(Exception e){e.printStackTrace ();} /j$`Cq3I 'd |*n#Dqc }+dDGFk Utility.log(nFileLength); *9)yN[w 6u[
B}%l 07#e{ return nFileLength; r";;Fk#5 } y|2y!&o,! !63]t?QXMG G^&P'* //保存下载信息(文件指针位置) ?CSv;: private void write_nPos() cu )w6!f { wq
=Ef try{ .ovG_O output = new DataOutputStream(new FileOutputStream(tmpFile)); "?r_A*U output.writeInt(nStartPos.length); >&D}^TMYY for(int i=0;i<nStartPos.length;i++) Xcw6mpLt { V8-*dE // output.writeLong(nPos); Q~zs]{\ output.writeLong(fileSplitterFetch.nStartPos); `FHKQS5 output.writeLong(fileSplitterFetch.nEndPos); t*(buAx } aM!%EaT output.close();
"U o~fJ } BVe c catch(IOException e){e.printStackTrace ();}
Y"UB\_= catch(Exception e){e.printStackTrace ();} u=f}t=3 } K(75)/ |$G|M=*LN }[b3$WZ //读取保存的下载信息(文件指针位置) D0VbD" y private void read_nPos() A40Q~X { [Nv)37|W try{ H*E4+3y DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); kJk6lPSqi7 int nCount = input.readInt(); b<8,'QgB nStartPos = new long[nCount]; "pTU&He nEndPos = new long[nCount]; zY2o;-d|4 for(int i=0;i<nStartPos.length;i++) cg).b?g { ?AYb@&% nStartPos = input.readLong(); B'8T+qvA nEndPos = input.readLong(); |DkK7gw } M&J$9X input.close(); I08W I u } u`Abko<D catch(IOException e){e.printStackTrace ();} ':#DROe! catch(Exception e){e.printStackTrace ();} :)DvZx HE@ } ^
RIWW0 S:{`eDk\A_ kj/v$m private void processErrorCode(int nErrorCode) >bbvQb+j { iCNJ%AZH System.err.println("Error Code : " + nErrorCode); I~)A!vp } n#"N"6s ,KFF[z fX{Xw0
//停止文件下载 e_3($pj public void siteStop() 5KC
Zg'h { l
dw!G/ bStop = true; W,bu=2K6 for(int i=0;i<nStartPos.length;i++) $*c!9Etl4 fileSplitterFetch.splitterStop(); @BoZZ $VnPs!a qc"PTv0q } Kdr}7#c } {VT**o //负责部分文件的抓取 M@<r8M]G **FileSplitterFetch.java a,eJO ?? */ NN]8T package NetFox; O6$n VpD3 t-?#x
w"
,ab j import java.io.*; 8T}Dn\f import java.net.*; +Y"HbNz ra}t#Xt` Q=h37]U+ public class FileSplitterFetch extends Thread { Rgb&EnVW =i:,")W7= {+jO/ZQu5 String sURL; //File URL Q3rLCg,; long nStartPos; //File Snippet Start Position }.N~jx0R long nEndPos; //File Snippet End Position c_Jcy int nThreadID; //Thread's ID 1{.5X8y1x boolean bDownOver = false; //Downing is over i#:M2&twE boolean bStop = false; //Stop identical <|1Kh ygv FileAccessI fileAccessI = null; //File Access interface L|Bjw3K&D w-P;E!gTt H?wf%0 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException EqF>=5* { h.4FY< this.sURL = sURL; `i)Pf WdBN this.nStartPos = nStart; >6Ody<JPHP this.nEndPos = nEnd; q_z ;kCHM nThreadID = id; (CrP6]= fileAccessI = new FileAccessI(sName,nStartPos);//定位 BY>]6SrP } hUe\sv!x? ;! ,I1{` vY);7 public void run() pMV ?vH { *X8Pa;x while(nStartPos < nEndPos && !bStop) EL(BXJrx{ { !112u#V I|.
< Xh@;4n try{ a^7QHYJ6 URL url = new URL(sURL); b]g#mQ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ccwz:7r httpConnection.setRequestProperty("User-Agent","NetFox"); g4&f2D5 String sProperty = "bytes="+nStartPos+"-"; FXh*!%"* httpConnection.setRequestProperty("RANGE",sProperty); SS!b` Utility.log(sProperty); iM M s3 ?\_vqW lY[\eQ
1: InputStream input = httpConnection.getInputStream(); Qb8Z+7 //logResponseHead(httpConnection); 2[i(XG{/ (&Mv!6] K)GpQ|4:< byte[] b = new byte[1024]; ?^WX]SAl int nRead; 5V8`-yO9 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) S~U5xM^s { OlX#1W] nStartPos += fileAccessI.write(b,0,nRead); TUq
, //if(nThreadID == 1) e,
}{$HStZ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); d#|%h]
6 } G6p R?K+ V)]lca CPcB17! Utility.log("Thread " + nThreadID + " is over!"); X3HJ3F;== bDownOver = true; %J+k.UrM //nPos = fileAccessI.write (b,0,nRead); 8^!ib/@v" } 1pP q)}=+ catch(Exception e){e.printStackTrace ();} !*PX- } N5 mhs# } >OKc\m2%Q <.:mp1,8V <vd}oiB@ //打印回应的头信息 85BB{T; public void logResponseHead(HttpURLConnection con) }c=YiH,o { EpK7VW for(int i=1;;i++) m O"Rq5 { =yZ6 $ hK String header=con.getHeaderFieldKey(i); y=zs6HaS if(header!=null) "qoJIwl#q //responseHeaders.put(header,httpConnection.getHeaderField(header)); <`Qbb=* Utility.log(header+" : "+con.getHeaderField(header)); aB{OXU}# else 3j2d&*0 break; Ls'8 } R'qBG(?i } Y8for' ,qj M1xkL$ T;v^BVn public void splitterStop() Se|h]+G { |8fdhqy_ bStop = true; HG^~7oMf } LBIEG_/m l $0w 9Z^ _ME?o } Tsocc5gWZ* h9QQ8}g 7%W@Hr,%F /* ihD|e& **FileAccess.java '![VA8 *//文件访问(定位,写) G0(A~Q" package NetFox; e}ivvs2 import java.io.*; $]MOAj"LH U04)XfO;] 0yxwsBLy public class FileAccessI implements Serializable{ \~.elKw<U n<Ki.;-ZE //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 rB_ESNx RandomAccessFile oSavedFile; Mo\nY5 long nPos; ([]\7}+8 gB0Q0d3\G, 5uU{!JuSa public FileAccessI() throws IOException E//*bmww { 6>b'g
~I this("",0); +1Pu29B0 } G$s=P g_?bWm4br ,irc=0M( public FileAccessI(String sName,long nPos) throws IOException lM.k*`$ { Kir|in)r0 oSavedFile = new RandomAccessFile(sName,"rw"); :@S=0|:j this.nPos = nPos; 02C; oSavedFile.seek(nPos); OT#foP } aZ}z/.b] (, $Lp0mB7 n6{nx[%7N7 public synchronized int write(byte[] b,int nStart,int nLen) B RtT 7 { xLw[
aYy4 int n = -1; eNrwkV^ try{ rLcXo%w oSavedFile.write(b,nStart,nLen); ZWx4/G n = nLen; @}{Fw;,(7n } ._<gc;G catch(IOException e) 9mEhZ" { %3T:W\h e.printStackTrace (); c3Zwp% } i|fkwV,5 >HRLL\u9 ;V^ I>-fnm return n; C3b<Wa]) } 29NP!W
/g EHm:&w 2>im'x 5 } MJ.Kor x)T07,3: U!T#'H5'- /* m^4O jik **SiteInfoBean.java 3Z74&a$ */ ]o`FF="at package NetFox; q[+V6n`Z5 M+lI,j+ #J%Fi).^) public class SiteInfoBean { [Rzn> [}y"rs`! Zk0? =f?j private String sSiteURL; //Site's URL ?{>5IjL)en private String sFilePath; //Saved File's Path \?AA:U* private String sFileName; //Saved File's Name kaV Ye)~ private int nSplitter; //Count of Splited Downloading File v [>8<z8 %Z(lTvqG B9oB5E public SiteInfoBean() >Yfo $S_ {//nSplitter的缺省值为5 [bd?$qi //default value of nSplitter is 5 b<KKF ' this("","","",5); osTin*T. } PAu/iqCH #b{;)C fL g")pvK[e public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) g'V,K\TG { /
!A&z4;D sSiteURL= sURL; ^7C,GaDsn sFilePath = sPath; h3;RVtS sFileName = sName; Wl3fR[@3Q this.nSplitter = nSpiltter; ; T WYO 1JN/oq; k)JwCt.% } #K/#-S Y'o.`':\~ iD2>-yf public String getSSiteURL() hj[sxC>z5 { 6d YUMqQ return sSiteURL; @m"P_1`* } r5&?-G
="]y^&(L( Fi"TY^-E; public void setSSiteURL(String value) .vXe}% { IF|%.%I$!U sSiteURL = value; x[2eA!NC } S]biN]+7s 9|//_4] Q3x.qz public String getSFilePath() uB35CRd { i%9xt1c_ return sFilePath; /f
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3 } BU;E6s>P ) 2Hl\"F +K[H!fD public void setSFilePath(String value) P4~C0z { N9cUlrDO sFilePath = value; ^v@&
q } 1PT0<C- kam\dn04 !,PoH public String getSFileName() a5%IjgQ&z { y?{YQ)fj return sFileName; PWs=0.Wj } 5[$jrG\! >]WQ1E[= z=VL|Du1OT public void setSFileName(String value) h:'wtn@l( { o^~KAB7 sFileName = value; Le}-F{~`^ } X3rvM8 O.+X,CQG* 04R-} public int getNSplitter() C?%Oi:Gi& { 1fb!sbGD.k return nSplitter; ,]-A~ ^| } {siIRl2& C@s;0-qL *7 >K" j public void setNSplitter(int nCount) -AU!c^-o { 9~WjCa*,& nSplitter = nCount; +W9#^ } L\X2Olfz1 } -m>ng
E~q qW:\6aEG &sJ%ur+G /* Po82nKAh **Utility.java .(2ui~ed */ $qj||zA package NetFox; Md ,KW# o9uir"= (.B+U'6 public class Utility { ?]u=5gqUU {H%1sI ;]Bkw6o public Utility() ~b.e9FhdA { S4BU ! w@ =U f7 %QrpFE5V5 } au 5qbP ;p 'Ej'E //线程睡眠 xBi``x2eY public static void sleep(int nSecond) ]pP [0S { 9 ~$'? try{ Gfn?1Kt{ Thread.sleep(nSecond); ?_7^MP> } z gDc= catch(Exception e) seo.1.Da2 { }~`l!ApD e.printStackTrace (); j-j,0!T~b } )X-/0G=N- } Yn }Ivg 'VTLp.~G~ //日志 rfS kQT public static void log(String sMsg) &%4*~;o { (Cjw^P|Y@
System.err.println(sMsg); _l;$<]re\k } E<XrXxS1O g}=opw6z <rpXhcR public static void log(int sMsg) \zPcnDB { )~l`%+ System.err.println(sMsg); @-QDp`QtI } ,a/<t" } Cn>RUGoUsI D#G(&<Q c/G]r|k /* Y^@Nvt$<K **TestMethod.java R3=]Av46 */ Fxr$j\bm package NetFox; D27MT/=7 J#^oUq i+HHOT public class TestMethod { x<%V&<z1g Lk~aMbw# J_PbRb public TestMethod() =^LX,!2zp{ { ///xx/weblogic60b2_win.exe $pg1Av7l try{ yl[6b1 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); `<:D.9vO " //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); A(Ss:7({ SiteFileFetch fileFetch = new SiteFileFetch(bean); _7LZ\V+MLW fileFetch.start(); 1Xi.OGl } zn@yt%PCV catch(Exception e){e.printStackTrace ();} +(|6Wv JxM[LvVi cc^ [u+ } y=)xo7( NJ{M-K%> b];p/V#
< public static void main(String[] args) $M=W`E[g { {)8!> K%G new TestMethod(); ]FLi^}ct } CUR70[pB) } (n,!v) 点击下载更多相关资料
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