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/* Ib`-pRU; **SiteFileFetch.java <PD?f/4 / */ #5ax^p2*~ package NetFox;
6ghx3_%w import java.io.*; x?,9_va] import java.net.*; l]LxL \Sy7"a -*ELLY[ public class SiteFileFetch extends Thread { "MOpsb, Zj9c9 9";sMB}W* SiteInfoBean siteInfoBean = null; //文件信息Bean &9[P-w;7u long[] nStartPos; //开始位置 =t0tK}Y+4 long[] nEndPos; //结束位置 Ud%s^A-qS FileSplitterFetch[] fileSplitterFetch; //子线程对象 @tT-JwU long nFileLength; //文件长度 hlbvt-C?}" boolean bFirst = true; //是否第一次取文件 ^rAa"p 9 boolean bStop = false; //停止标志 X ]j)+DX> File tmpFile; //文件下载的临时信息 .IrNa>J~ DataOutputStream output; //输出到文件的输出流 Xq#Y*lKVD NTs7KSgZ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 7L(eh7 public SiteFileFetch(SiteInfoBean bean) throws IOException !X^Ce)1K { J>0b1 siteInfoBean = bean; m?CZQq, //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); kPxT"
" k tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); b'p4wE> if(tmpFile.exists ()) " {dek { T2'RATfG bFirst = false; E9fxjI%1 read_nPos(); hlJpElYf } /8yn vhF# else 'o4p#`R:8 { R=)55qu nStartPos = new long[bean.getNSplitter()]; aEVsU|
nEndPos = new long[bean.getNSplitter()]; ,I.WX,OR } i?@M ;iYff N rVSZ.+n
?}p:J{ } Q\Kx"Y3i Gctsp2ndW E)N<lh public void run() \Q$HXK { d3Di/Iej //获得文件长度 n| !@1sd //分割文件 ;T +pu>) //实例FileSplitterFetch 1QqHF$S //启动FileSplitterFetch线程 BHFY%6J! //等待子线程返回 1=}qBR#scY try{ \6I+K" if(bFirst) K{ fsn4rk { ,YYVj{~2 nFileLength = getFileSize(); <PN"oa# if(nFileLength == -1) Q%S9fq,q { R,2P3lv1v@ System.err.println("File Length is not known!");
W-~n|PX8+ } d 4?d4;{ else if(nFileLength == -2) :nY2O { h@{_duu System.err.println("File is not access!"); '])2k@o@ } *LC+ PZV@ else ;
0v>Rfa { )v4b for(int i=0;i<nStartPos.length;i++) cE'L% Z { {LzH&qu nStartPos = (long)(i*(nFileLength/nStartPos.length)); nKr9#JebRC } }G <T :(a for(int i=0;i<nEndPos.length-1;i++) 3riw1r;Q { F^$led1/F nEndPos = nStartPos[i+1]; QnouBrhO } 'J)2g"T@ nEndPos[nEndPos.length-1] = nFileLength; VhGs/5 } ?L)
!pP] } 1nknSw# P,S
G.EFK Flxvhl)L //启动子线程 ,B}I?vN. fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; RC#C\S6 for(int i=0;i<nStartPos.length;i++) L)QE`24 { #L}+H!Myh fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Uggw -sRU siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), CWo1.pV w nStartPos,nEndPos,i); .9[45][FK Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); H5cV5E0 fileSplitterFetch.start(); r\6"5cQ= } w2O!M!1 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), A=zPLq{Sb siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); g.JN_t5 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", /.Nov nEndPos = " + nFileLength); gwd (N // fileSplitterFetch[nPos.length-1].start(); d@0Kr5_ `i
+g{kE2M 5qUTMT['T //等待子线程结束 hJz):d>Im //int count = 0; cV{%^0?D //是否结束while循环 [L$9p@I boolean breakWhile = false; "&Dx=Yf KfCoe[Vv I:V0Xxz5t while(!bStop) R
#]jSiS { ,5Pl\keY write_nPos(); Nr<`Z Utility.sleep(500); JPM))4YDR breakWhile = true; ]{~NO{0@Y ; |/leu8 ;< )~Y- for(int i=0;i<nStartPos.length;i++) kU-t7'?4 { ,vqr<H9e if(!fileSplitterFetch.bDownOver) Rv,JU6>i { (R~]|?:wt breakWhile = false; if;71ZE break; ./j,Z$| } 9z;HsU v } <!$:8ls if(breakWhile) "N:XzG break; 0n ~ Zz <WXzh5D2 @pI5lh //count++; x6afI<dm //if(count>4) zOEY6lAwI // siteStop(); &bz:K8c } `u!l3VZ/4 @UBjq%z GT hL/M
System.err.println("文件下载结束!"); M}_i52 } .O*bILU catch(Exception e){e.printStackTrace ();} 2-zT$`[]J } 5 )2:stT73 v]%WH~> b5IA"w //获得文件长度 6ZgU"!|r public long getFileSize() fW`&'! { OX%MP!#KU int nFileLength = -1; FG3UZVUg9 try{ A`}yBSb URL url = new URL(siteInfoBean.getSSiteURL()); w#JJXXQI HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /MB{Pmk$R httpConnection.setRequestProperty("User-Agent","NetFox"); ;
UiwH %;D+k 3'c\;1lhT int responseCode=httpConnection.getResponseCode(); bi ozZ if(responseCode>=400) Iu~\L0R427 { FLoNE>q processErrorCode(responseCode); 4$/i%B#ad return -2; //-2 represent access is error =.|J!x } e&MC|US=\ 1[*UYcD ,U)"WLmY String sHeader; mD:IO (vR 9H(# 4RKW for(int i=1;;i++) UgB'[@McS { _ 46X%k //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Z'^U ad6 //Utility.log(in.readLine()); iFSJL,QZ3 sHeader=httpConnection.getHeaderFieldKey(i); =O _z( if(sHeader!=null) e98lhu"|H { Md)zEj`\ if(sHeader.equals("Content-Length")) ~,D@8tv { =k3!RW' nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); CV$],BM break; ej&<GM| } U%7i=Z{^Ks } gIR^)m else h@7FY break; JB</euyV } sUl6hX4 } E'1+ Yq catch(IOException e){e.printStackTrace ();} ka\OJ7u catch(Exception e){e.printStackTrace ();} ]U[X1W+@ :J}t&t \&V0vN1 Utility.log(nFileLength); -]Cc Xf=XBoN| _FbC{yI8; return nFileLength; HQ9f ,< } s/"&9F3 qP!eJ6[Nh" *IlaM'[* //保存下载信息(文件指针位置) w)E@*h<Z private void write_nPos() [MX;,%;; { `&M{cfp_ try{ C8@TZ[w output = new DataOutputStream(new FileOutputStream(tmpFile)); /|{,sWf2 output.writeInt(nStartPos.length); 6
y"-I!& for(int i=0;i<nStartPos.length;i++) +&tgJ07A { Y9SGRV( // output.writeLong(nPos); Uts"aQ output.writeLong(fileSplitterFetch.nStartPos); B;Nl~Y| \ output.writeLong(fileSplitterFetch.nEndPos); #LcrI } K.tlo^#^B[ output.close(); ||2Q~*: } J2GcBzRH catch(IOException e){e.printStackTrace ();} hovGQHg catch(Exception e){e.printStackTrace ();} 5yh/0i5 | } zHB_{(o7 -0o[f53}p t^=U*~ //读取保存的下载信息(文件指针位置) XA0(f* private void read_nPos() 9D@$i<D: { B UUf;Vv try{ 6XEZ4QP} DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 9z
m|Lbj int nCount = input.readInt(); D| I Ec? nStartPos = new long[nCount]; @mw "W{ nEndPos = new long[nCount]; {hSGv for(int i=0;i<nStartPos.length;i++) kg5ev8 { NCeaL-y7 nStartPos = input.readLong(); 4}v@C|.p nEndPos = input.readLong(); CDMfa&;T } [c K^+s)N input.close(); ske@uzAz } j dut4 nFc catch(IOException e){e.printStackTrace ();} &Y|Xd4: catch(Exception e){e.printStackTrace ();} L/}iy} } $*MCUnl @`u?bnx]e TDK@)mP private void processErrorCode(int nErrorCode) ZU'!iU|8 { H(+<)qH System.err.println("Error Code : " + nErrorCode); \L!uHAE2a } 3EFD%9n n/e
BE q U0B2WmT~Q //停止文件下载 `hh9"Ws% public void siteStop() ?dy~mob { W+>wu%[L bStop = true; aA*9, for(int i=0;i<nStartPos.length;i++) ucYkxi`x fileSplitterFetch.splitterStop(); hAR?
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I8m:3fL" //负责部分文件的抓取 #mc!Wt10 **FileSplitterFetch.java *DeTqO65 */ <dR,' package NetFox; :{g7lTM B:oF;~d/, tn<6:@T
import java.io.*; :Z`4j import java.net.*; W*T{,M@Y "X1vZwK8N zok D:c public class FileSplitterFetch extends Thread { $%qg" gtU1'p" *_hLD5K! String sURL; //File URL T{MC-j _T9 long nStartPos; //File Snippet Start Position W? ,$!]0 long nEndPos; //File Snippet End Position D5]{2z}k int nThreadID; //Thread's ID 6vz1*\:H~ boolean bDownOver = false; //Downing is over m@qqVRn#) boolean bStop = false; //Stop identical Agy
<j
FileAccessI fileAccessI = null; //File Access interface D&{
*AH%Q <)#kq1b? ,"
R>}kPli public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException O]=C#E{ { o" _=K%9 this.sURL = sURL; u}jrfKdE this.nStartPos = nStart; +$pJ5+v this.nEndPos = nEnd; (!zM\sF nThreadID = id; 9U<Hf32 fileAccessI = new FileAccessI(sName,nStartPos);//定位 F>Jg~ FD* } QlzQ]:dWC M []OHw vjK, I9 public void run() p5*lEz|$ { n6f3H\/P& while(nStartPos < nEndPos && !bStop) |-kEGLH[*V { ?SX_gYe9
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#A h5onRa*7 try{ )!-S|s' URL url = new URL(sURL); z+"0>ZN& HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); c^S&F9/U* httpConnection.setRequestProperty("User-Agent","NetFox"); :XS"#^aJ String sProperty = "bytes="+nStartPos+"-"; ,P@QxnQ httpConnection.setRequestProperty("RANGE",sProperty); gMZ&,n4 Utility.log(sProperty); 8XbR 79tJV 1q!sKoJ< InputStream input = httpConnection.getInputStream(); N(R,8GF5G //logResponseHead(httpConnection); lG]GlgSs Nmf#`+7gCI NgxO&Zp byte[] b = new byte[1024]; \{>eOD_ int nRead; FOp_[rR
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) MVAc8d S { dofR)"<p,^ nStartPos += fileAccessI.write(b,0,nRead); z(UX't (q //if(nThreadID == 1) r5)f82pQ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
rk|a'& } 0*{p Oe/u R6Pz#`n w:R]!e_6\9 Utility.log("Thread " + nThreadID + " is over!"); &
=sa yP bDownOver = true; ~%G Ssm\J //nPos = fileAccessI.write (b,0,nRead); m?vAyi } f[M"EMy catch(Exception e){e.printStackTrace ();} gT7I9 (x!W } !L$oAqW } "GB UQ} 7eH@n<]Y2 *EE|?vn //打印回应的头信息 ke</x+\F public void logResponseHead(HttpURLConnection con) %>NRna { ZArf;&8 for(int i=1;;i++) Oi#k:vq4 { s @3zx String header=con.getHeaderFieldKey(i); JgZdS-~ if(header!=null) rN'k4V"K //responseHeaders.put(header,httpConnection.getHeaderField(header)); a!{hC)d* Utility.log(header+" : "+con.getHeaderField(header)); CY\mU_.b else h@/>?Va break; W.sD2f } p!V)55J* } ri;r7Y9V9` IT7:QEfKU 2f
/bEpi public void splitterStop() <#!8?o&i { zkvH=wL bStop = true; 6UtG-WHHt } ]n/jJ_[ yl|R:/2V 9Z}S]-u/ } ;+!xZOmm DwQp$l'NfW (jt*u (C&Y /* l$qmn$Uc **FileAccess.java \>_eEZ5 *//文件访问(定位,写) LIc*tsl package NetFox; + >Fv*lux import java.io.*; jh-kCF HM;4=% puk4D public class FileAccessI implements Serializable{ ([E#zrz% P'KY.TjWb //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 !$4Q]@ } RandomAccessFile oSavedFile; 1"N/ZKF-x long nPos; iOE9FW|e s"gKonwI2 F\I5fNs@ public FileAccessI() throws IOException 3Bu D/bs { * ,|)~$=> this("",0); zV9
= } B>c[Zg1 >IR`] ]M02>=1 public FileAccessI(String sName,long nPos) throws IOException xow6@M, { 9}IVNZc oSavedFile = new RandomAccessFile(sName,"rw"); OD>u$tI9 this.nPos = nPos; n/,rn>k7: oSavedFile.seek(nPos); N GX-'w } 3g4vpKg6c
~`a#h# =+kvL2nx- public synchronized int write(byte[] b,int nStart,int nLen) j=zU7wz)D { 0YgFjd
5 int n = -1; %`8KG(F^ try{ il 8A&`% oSavedFile.write(b,nStart,nLen); 7cJO)cm0' n = nLen; T=iZ9w } fbW,0 catch(IOException e) hv_pb#1Ks { Lk$Je
O e.printStackTrace (); wt3Z?Pb } bF8xQ<i~Y t/EMBfLc M,=@|U/B return n; k1@
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di0 N23+1 h } 8=u+BDG bHlD m~5 7J</7\ /* _tWfb}6;Zb **SiteInfoBean.java T5X'D(\| */ R-0_226 package NetFox; ~ L i% 0YTtA]|`4 a v|6r# public class SiteInfoBean { d%[`=fs]|m E?;T:7.% F"HI>t)> private String sSiteURL; //Site's URL Ot8S'cB1,$ private String sFilePath; //Saved File's Path %RK\Hz2q3 private String sFileName; //Saved File's Name
EY[Q% private int nSplitter; //Count of Splited Downloading File Q,`2DHhK \p=W4W/ 7T(OV<q;# public SiteInfoBean() c<t3y7 {//nSplitter的缺省值为5 r>:7${pF //default value of nSplitter is 5 r&l*.C* this("","","",5); (w@MlMk } &j~|3 +8@`lDnr "3KSmb public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) TF iM[ { )DZ-vnZ#t0 sSiteURL= sURL; ?U9d3] W sFilePath = sPath; XCi]()TZ_ sFileName = sName; ?M{6U[? this.nSplitter = nSpiltter; [E
:`jY S&))
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GXM4I !O -_Dp\# +K?N:w public String getSSiteURL() "VVR#H}{ { SAo\H return sSiteURL; LkZo/K~ } UE$[;Zg <W[8k-yOV` a]=vq(N'r public void setSSiteURL(String value) P+%)0*W { "drh+oo. sSiteURL = value;
8JOht(m } SUi1*S /B?SaKh /zP)2q^ public String getSFilePath() po$ynp756 { SoGLsO+R return sFilePath; hv8[_p`> } EKS<s82hF& .yh2ttf<gB 96E7hp !: public void setSFilePath(String value) 3%4Mq6Q` {
T]Td4T! sFilePath = value; a.U:B
[v` } h/bYtE gsq[ 9 h
_7;UQH public String getSFileName() y!c7y]9__2 { l
\n:"*To return sFileName; e^Wv*OD' } Olh%"=*; #_L& E=~WQ13Q public void setSFileName(String value) dv}R]f' { jL).B& sFileName = value; k<";t } Z q>.;> 2DqHqq9m R M+K":p public int getNSplitter() kJpHhAn4 { QAnfxt6 return nSplitter; iKH T } QN a3S* k)' z<EL6c ;9 n8on\ public void setNSplitter(int nCount) ssbyvzQ { moI<b\G@ nSplitter = nCount; ^M5uLm-_s } H0NyxG< } M@[gT?mv1 *G|]5 kV9NFo22 /* J|8YB3K, **Utility.java yVv3S[J */ ):EXh # package NetFox; 7+r5?h| YVp0}m !7*/lG public class Utility { RtQfE+ boB{Y 7gO4 JY8pV+q @= public Utility() RA67w& { ${eh52)` TL:RB)- < #T`+~tW'| } 640V&<+v )`7h,w
J[1 //线程睡眠 M<pgaB0 public static void sleep(int nSecond) FEswNB(]* { ~,7R*71 try{ }}R!Y) Thread.sleep(nSecond); ..mz!:Zs0 } bZfJG^3 catch(Exception e) >9|+F[Fc { +c_CYkHJ/ e.printStackTrace (); $>m<+nai' } a8c]B/ } K#m o+n5-; El}z^e //日志 Xxw.{2Ji!q public static void log(String sMsg) AOUO',v { #oY7v,x\ System.err.println(sMsg); .1}(Bywm5 } U%l{>*q wyM3|%RZ n_glYSV! public static void log(int sMsg) ]h@:Y] {
Q)&Ztw< System.err.println(sMsg); Y
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On(d **TestMethod.java \3/'#
*/ SYx)!n6U package NetFox; TmiQq'm[b mH"`46 Ja1*a,],L public class TestMethod { =|/b[Gd( P2kZi=0 1;V5b+b public TestMethod() nFSa~M { ///xx/weblogic60b2_win.exe &\r%&IX/ try{ cAS5&T< SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 3ssio-X //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); P.0-( SiteFileFetch fileFetch = new SiteFileFetch(bean); .wywO| fileFetch.start(); WjB[e> } sh1fz 6g catch(Exception e){e.printStackTrace ();} Oc>-jhx? NINiX( Bv3v;^ } JQqDUd ia[wVxd yLP0w^Q public static void main(String[] args) Zl)|x%z { ~+F: QrXcI new TestMethod(); %j,Ny}a } '"EOLr\Z, } /zWWUl`: 点击下载更多相关资料
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