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/* G/x3wR **SiteFileFetch.java c28oLT1|D */ ^U0apI package NetFox; <wIp$F. import java.io.*; 9`LU=Xv/ import java.net.*; 5O;/ lX!u OlD7-c2L] +~R.7NE% public class SiteFileFetch extends Thread { "uV0Oj9: ')5jllxv "wc`fg"3 SiteInfoBean siteInfoBean = null; //文件信息Bean K1m!S9d`x long[] nStartPos; //开始位置 ,Ut!u) long[] nEndPos; //结束位置 #C;#$|d FileSplitterFetch[] fileSplitterFetch; //子线程对象 :ofE8] long nFileLength; //文件长度 y1@"H/nYJ boolean bFirst = true; //是否第一次取文件 +1JZB*W boolean bStop = false; //停止标志 Apw-7*/ File tmpFile; //文件下载的临时信息 F1Zk9%L%9$ DataOutputStream output; //输出到文件的输出流 0C9QAJa i9#`F.7F //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) dpc=yXg>"c public SiteFileFetch(SiteInfoBean bean) throws IOException Gaw,1Ow!`2 { ;
@[.$Q@I siteInfoBean = bean; K'{ wncumQ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); .@x"JI>; tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Y(Z(dV!Po if(tmpFile.exists ()) rRA_'t;uK { !0d9<SVC bFirst = false; +v `^_ read_nPos(); zm_hLk } ?(`nBlWQ5 else IdC k { H)?" 8 s nStartPos = new long[bean.getNSplitter()]; 4`^TC[ nEndPos = new long[bean.getNSplitter()]; FZ}C;yUPD } lHj7O&+ %_i0go,^ *}Ae9 c_DB^M!h } `6l24_eKf *{4{<O<4 01SFOPuR%( public void run() \:f}X?: { A%sxMA!K, //获得文件长度 '!|E+P- //分割文件 ogh2kht //实例FileSplitterFetch BYA=M*f //启动FileSplitterFetch线程 b}q(YgH< //等待子线程返回 E%v[7 ST try{ "> 4[+' if(bFirst) 0UAr}H.: { =4%WOI nFileLength = getFileSize(); qz_TcU' if(nFileLength == -1) "~,(Xa3x { B )3SiU System.err.println("File Length is not known!"); daokiU+l2 } TJGKQyG$L else if(nFileLength == -2) 14)kKWG { m`4j|5 System.err.println("File is not access!"); HpgN$$\@ } P^{`d_[K% else =_~'G^`tu { EPUJa~4 for(int i=0;i<nStartPos.length;i++) '5+, lRu { Jut'xA2Dr nStartPos = (long)(i*(nFileLength/nStartPos.length)); ,C12SM*@ } #| e5 for(int i=0;i<nEndPos.length-1;i++) 9?mOLDu}Q0 { Q,LWZw~" nEndPos = nStartPos[i+1]; l9Cy30O6 } w})&[d nEndPos[nEndPos.length-1] = nFileLength; sC*E;7gT, } dIh(~KqB } V:$1o kO\&mL&
qD %Zi,nHg8 //启动子线程 r?{LQWP>e fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Mh@ylp+q for(int i=0;i<nStartPos.length;i++) 0|3B8m { %4g4 C# fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }t{^*( siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), peP:5WB nStartPos,nEndPos,i); UgBY
){< Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?Pf
,5=*B fileSplitterFetch.start(); m`w6wz } oFA$X Y // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), iO#xIl< siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); cN(QTbyl6Q // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", d=Ihl30m nEndPos = " + nFileLength); < 2r#vmM // fileSplitterFetch[nPos.length-1].start(); x-P_}}K 79 Vf2!0 U%6lYna{M# //等待子线程结束 Wa<NId //int count = 0; s`#j8>`M
//是否结束while循环 |6G5
?| boolean breakWhile = false; m<;" 1<k wH5O>4LO J~ rC while(!bStop) ?9M+fi { Hqy>!1! write_nPos(); Nr7.BDA Utility.sleep(500); HCZ%DBU96 breakWhile = true; NWX%0PGZ tg4&j$ &l)v' for(int i=0;i<nStartPos.length;i++) /60=N`i
{ v\T1,Z@N^ if(!fileSplitterFetch.bDownOver) o=5uM { z?g4^0e breakWhile = false; PhL5EYn break; / S^m!{ } KV(W|~+ rM } ))zaL2UP. if(breakWhile) Z@Z`8M@Q, break; 0|k[Wha# u01^ABn f)fw87UPc //count++; y9mZQq //if(count>4) \M^4Dd Ay // siteStop(); e/%YruzS } ^W*)3;5 TW?
MS em gpl!Iz~5 System.err.println("文件下载结束!"); 6XqO'G } y$W3\`2q catch(Exception e){e.printStackTrace ();} uvd> } H*<dte< mjc:0hH Hc3/`.nt //获得文件长度 }e|]G,NZO public long getFileSize() %^A++Z$` { nr6U>
KR^ int nFileLength = -1; $^GnY7$!> try{ &WS%sE{p_ URL url = new URL(siteInfoBean.getSSiteURL()); D]y.!D{l2 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); A>S2BL#= httpConnection.setRequestProperty("User-Agent","NetFox"); l;i
u` cE?J]5#^ (b5af_ c int responseCode=httpConnection.getResponseCode(); VNfx>&` if(responseCode>=400) pm|]GkM { BGOI processErrorCode(responseCode); /zAx`H return -2; //-2 represent access is error )`0 j\ } J]e&z5c B 8,{jwB A
2 )%+ String sHeader; ^hJ,1{o gE#,QOy UNHHzTsr? for(int i=1;;i++) s"Wdbw(O ' { ;anG
F0x //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); cgAcAcmY //Utility.log(in.readLine()); $Vh82Id^ sHeader=httpConnection.getHeaderFieldKey(i); w0SgF/"@ if(sHeader!=null) pDT6>2t { Mf"B!WU>]B if(sHeader.equals("Content-Length")) 9 R1]2U$| { ~b/>TKn+ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); I_Qnq4Sk( break; ml2HA4X&$Y } ~heF0C_ } 9yPB)&"EF else {I
,' break;
I._=q } X"sN~Q.0 } f]ef 1# catch(IOException e){e.printStackTrace ();} !ywc). ]e catch(Exception e){e.printStackTrace ();} z m%\L/BF 82<!b]^1 D.~t#a A Utility.log(nFileLength); ' wEP:} ~Q0}>m,S &}ow-u9c3 return nFileLength; f~Su F,o@h } 4$rO,W/&0 <|@9]>z m,b<b91 //保存下载信息(文件指针位置) 9UZX+@[F private void write_nPos() 0NGokaD)H { x0]*'^aA try{ w,&RHQB output = new DataOutputStream(new FileOutputStream(tmpFile)); >8##~ZuF+ output.writeInt(nStartPos.length); ,yoT3_%P for(int i=0;i<nStartPos.length;i++) jB;+tDC!Co { Hs9uDGWp // output.writeLong(nPos); Z,z^[Jz output.writeLong(fileSplitterFetch.nStartPos); U"Y$7~ output.writeLong(fileSplitterFetch.nEndPos); /i<g>*82 } Kt-@a%O0 output.close(); Ok@5`?08 } )-mB^7uXGv catch(IOException e){e.printStackTrace ();} _Cxs"to catch(Exception e){e.printStackTrace ();} Gs%kqD{= } bFpwq#PDW> L\UYt\ks B?]^}r //读取保存的下载信息(文件指针位置) U*Q$:%72vO private void read_nPos() c09 uCito { C-Mop,w try{ ]T$~a8 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); SF6n06UZu int nCount = input.readInt(); mVxS[Gq nStartPos = new long[nCount]; m4EkL nEndPos = new long[nCount]; 0wx`y$~R for(int i=0;i<nStartPos.length;i++) ;3w W)gL1 { <X: 9y nStartPos = input.readLong(); ykZ)`E]P` nEndPos = input.readLong(); $V[ob } TPrwC~\B/ input.close(); 8?PNyO-Wt5 } `0L!F"W catch(IOException e){e.printStackTrace ();} bNXT*HOZb3 catch(Exception e){e.printStackTrace ();} EprgLZ1B } 4`i_ 4&TS WPPmh~: rA9"CN private void processErrorCode(int nErrorCode) L"IdD5`7T { =KX:&GU System.err.println("Error Code : " + nErrorCode); ?g!)[p`v } "2 Kh2[K @Fo0uy\G 8 }-"&-X //停止文件下载 )#1@@\< ^T public void siteStop() P?>p+dM { YYhRdU/g bStop = true; lO:[^l?F for(int i=0;i<nStartPos.length;i++) :Bl $c,J fileSplitterFetch.splitterStop(); nH;^$b'LZ !dZC-U~ Up8#Nz
T } ~}uTC36C\ } )jnxR${M //负责部分文件的抓取 u{HB5QqK **FileSplitterFetch.java NJ3b Oq */ CT/`Kg_ package NetFox; qPWYY 6%:N^B=%} ~/QzL.S;p import java.io.*; 0nBAO import java.net.*; OD{Rh(Id -V(5U!^B [}.OlR3) public class FileSplitterFetch extends Thread { B+,Z 3* V0"UFy?i \!`*F:7]- String sURL; //File URL LvB -%@n long nStartPos; //File Snippet Start Position ;l"z4>kt7 long nEndPos; //File Snippet End Position k}~|jLu@g int nThreadID; //Thread's ID p^NYJV boolean bDownOver = false; //Downing is over >!?u8^C boolean bStop = false; //Stop identical D[ny%9 : FileAccessI fileAccessI = null; //File Access interface ;4%^4<+3 K@ 6$|.bc BoXQBcG]w public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException @32JMS< { )~s(7
4`} this.sURL = sURL; ]hc.cj`\W& this.nStartPos = nStart; 0fwo8NgX this.nEndPos = nEnd; Z#%4QIz? nThreadID = id; u+kXJ fileAccessI = new FileAccessI(sName,nStartPos);//定位 ohOze\T)= } Sm{idky)[ |s+y]3-_ 5e6 f)[} public void run() {a\m0Bw/ { 9ssTG4Sa while(nStartPos < nEndPos && !bStop) D`V03}\- { ^g"G1,[%w ?l
&S:`
L .IE2d%]? try{ iG!tRNQ{y URL url = new URL(sURL); ] K3^0S/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); g/)mbL>= httpConnection.setRequestProperty("User-Agent","NetFox"); 1.6yi];6 String sProperty = "bytes="+nStartPos+"-"; _Y?p =; httpConnection.setRequestProperty("RANGE",sProperty); (Z fY/ Utility.log(sProperty); f![?og)I% 1kEXTs=, 9LI#&\lba InputStream input = httpConnection.getInputStream(); N7v7b<6 //logResponseHead(httpConnection); d,tGW j'R{llZW _Ryt|# y byte[] b = new byte[1024]; 2~h! ouleY int nRead; .7 6T<j_ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) c6.S jV { >\6Tm nStartPos += fileAccessI.write(b,0,nRead); .fY1?$*6c //if(nThreadID == 1) ,@!io // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <&^P1x<x } 094~ s +GqK$B(x7 -}#=L@ Utility.log("Thread " + nThreadID + " is over!"); k<(G)7'gm bDownOver = true; K9O%SfshF //nPos = fileAccessI.write (b,0,nRead); BPs|qb- } ;n]GHqzY_ catch(Exception e){e.printStackTrace ();} *'[8FZ|dQ } 6Y9F U } v8
rK\ }% 2hBl/ {x_SnZz & //打印回应的头信息 eYNu78u public void logResponseHead(HttpURLConnection con) l Oxz&m { T6mbGE*IeE for(int i=1;;i++) pV:;!+ { Ad7N'1O String header=con.getHeaderFieldKey(i); W;L<zFFbU) if(header!=null) .Z?@;2<l //responseHeaders.put(header,httpConnection.getHeaderField(header)); d ? Uj3G Utility.log(header+" : "+con.getHeaderField(header)); ["O/%6b9+ else GO&~)Vh&7 break; D/U=zDpiB } l/*NscYtQ } &k53*Wo 9d kuvk}: >%6a$r~@ public void splitterStop() M9~eDw'Pr { py|ORVN(Z bStop = true; +|0f7RB+R } KYw~(+gHv2 I'h|7y\ 4C:-1gu7 } Q'
b@5o &JUHm_wd&S
-ElK=q /* ;D8175px; **FileAccess.java xxy
(#j$ *//文件访问(定位,写) #!.26RM:P package NetFox; C\`*_t import java.io.*; "5wer5?
t dgEH]9j& 6[x6:{^J public class FileAccessI implements Serializable{ [LF<aR5 |7#S0Ca@ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 <Jc
:a?ICe RandomAccessFile oSavedFile; 2/dvCt6 N long nPos; w|,BTM:e uD=FTx pLiGky public FileAccessI() throws IOException F[@M? { zk++#rB this("",0); /_(q7:<ZF } dy'
J~Eo7 L,\wB7t <*Bk.>f! public FileAccessI(String sName,long nPos) throws IOException ']&rPvkL { K@<%Vc>L( oSavedFile = new RandomAccessFile(sName,"rw"); Z#vU~1W this.nPos = nPos; Ze.\<^-t oSavedFile.seek(nPos); o4t6NDa } qdNt2SO c'}dsq\ *Dhy a g public synchronized int write(byte[] b,int nStart,int nLen) h0z>dLA#2 { 5Tg[-tl int n = -1;
Q!ReA{ try{ Dt~ |)L+ oSavedFile.write(b,nStart,nLen); ""W*) rR
n = nLen; N<e72x } [bh8Nj\E catch(IOException e) aovw'O\Q { 0`Hr(J`F e.printStackTrace (); mmvo
>F" } !mIr_d2" J/xbMMb
MO%kUq|pg return n; :~wU/dEEiz } _Squ%z:D 5H79-QLd _j sJS<21 } xcM*D3 ]t)#,'$^[W 7GDrH/yK /* [4
y7tjar^ **SiteInfoBean.java |PxTm */ 4apaUP=Jp package NetFox; y*<x@i+h s9[547?` &xLCq&j1 public class SiteInfoBean { k0@*Up3{7 SUN!8
qFA 'Da*MGu9 private String sSiteURL; //Site's URL EWC{896, private String sFilePath; //Saved File's Path @;t6Slc"~ private String sFileName; //Saved File's Name RAU" private int nSplitter; //Count of Splited Downloading File 0BrAgv"3a_
{,+MaH AMre(lgh public SiteInfoBean() kHb H{]) {//nSplitter的缺省值为5 @(W{_ mw //default value of nSplitter is 5 %EEQ^lm this("","","",5); 5j~1%~,# } m <'&`B; n5+Z|<3) _lMSW6 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 1n!xsesSc { sd&^lpH sSiteURL= sURL; *ry}T= sFilePath = sPath; N~|Z@pU" sFileName = sName; de_%#k1:L this.nSplitter = nSpiltter; `6xr:s G\(cnqHk Yfr4<;% } g[Q+DT A/!"+Yfw Ctx`b[&KXX public String getSSiteURL() xG WA5[YV { N?2C*|%f return sSiteURL; 7S2"e[-x } s("\]K 3I G<Ot9 LYO2L1u) public void setSSiteURL(String value) <DZ$"t { K05U>151 sSiteURL = value; SS6K7 } [H@71+_Q U:0Ma6< HCw,bRxm public String getSFilePath() N/78Ub { K%ptRj$ return sFilePath; CE @[Z } ?$#P
=VK ^^B~v<uK H[RX~Xk2E public void setSFilePath(String value) 4L_)@n} { >hY.F/[ sFilePath = value; qTSe_Re } Eh*(N(` 3EHB~rL/C c~+KrWbZ~ public String getSFileName() JwQ/A[b { erhez return sFileName; sC A } @b!W8c 6 waU2C2!w hHZ'*,9 y public void setSFileName(String value) }T-'""* { 1obajN sFileName = value; '<s54 Cb } wXtp(YwlH Y?$ h5(OjlMC public int getNSplitter() fejC,H4I { pp{2[> return nSplitter; {A'*3(8 } PW82
Vp. OJd/#KFm }m'n1tm;
public void setNSplitter(int nCount) x[0O*ty-*< { w {"1V7| nSplitter = nCount; Cv}^]_`Q } T2 S fBs } i4]oE&G On54!m C}(@cn `L /* y/5GY,z%aL **Utility.java VZq~ -$ */ #wo
*2( package NetFox; Inn{mmz
1 `<7!Rh,tS^ |-)8=QDz)r public class Utility { AL.psw-Il o+B) =#v? }JG public Utility() s*s~yH6 { L SP p _CfJ Kp) FJ-H
; } JhfVm*,
?C#E_ //线程睡眠
o8Gygi5 public static void sleep(int nSecond) fGO\f;P { tAF?.\x"g try{ Z &Ciy n Thread.sleep(nSecond); I# &r5Q } :nQlS catch(Exception e) P RWb6 { LP=j/qf| e.printStackTrace (); ATl?./T u } Xv|=RNz } }!AS? n{FjFlX2= //日志 )@X0'X< public static void log(String sMsg) }Nsdk',} { ^J5{quV System.err.println(sMsg); iN[x
*A|h } L23}{P d<6F'F^w.7 D]]wJQU2 public static void log(int sMsg) 1|(Q| { BG+i tyH System.err.println(sMsg); H*'1bLzq } }=5>h' < } p 1'l D b,E ?{uG ?: yz/9( /* ch8a **TestMethod.java eF,F<IJT{ */ N)H "'#- package NetFox; Q$c6l[(g -2M~KlYl x,!Dd public class TestMethod { d+
jX49Vt lh8QtPe "`$,qvNN public TestMethod() V4n~Z+k { ///xx/weblogic60b2_win.exe JaCX}[R try{ q 84*5- SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); x
b"z%.j //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); m2c'r3 UEu SiteFileFetch fileFetch = new SiteFileFetch(bean); P:"R;YCvE fileFetch.start(); >>y`ap2%V } 6ZqU:^3 catch(Exception e){e.printStackTrace ();} 0%ul6LvM \Ii{sn9 Xp:A;i9 } "m K`3</G Alxf;[s ]n!V public static void main(String[] args) r5}p . { wa"0`a:`; new TestMethod(); Vu:ZG*^ } P`biHs8O } 'J,UKK\5 点击下载更多相关资料
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