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/* @kU{ **SiteFileFetch.java l:NEK`>i */ (WT0j package NetFox; }W&hPC import java.io.*; S.o 9AUv9 import java.net.*; v=Ep _%WJ7~> v5"5UPi- public class SiteFileFetch extends Thread { X\3IY:Q@T _Y@'<S. ;u;Y fOr SiteInfoBean siteInfoBean = null; //文件信息Bean .<JD'%?" long[] nStartPos; //开始位置 jJ%
*hDZ6t long[] nEndPos; //结束位置 f(q^R FileSplitterFetch[] fileSplitterFetch; //子线程对象 SF*!Z2K long nFileLength; //文件长度 ahgm*Cpc boolean bFirst = true; //是否第一次取文件 x7$U boolean bStop = false; //停止标志 $q#|B3N% File tmpFile; //文件下载的临时信息 v8!
1"FYL DataOutputStream output; //输出到文件的输出流 ,=KJ7zIK? wc-H`S|@ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ;p~@*c'E public SiteFileFetch(SiteInfoBean bean) throws IOException C[ <OF/ { ]9z{
95 siteInfoBean = bean; ;c73:'e //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); f:L%th tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); uiq)?XUKv if(tmpFile.exists ()) ,6rg00wGE { kM>0>fkjE bFirst = false; =8OPjcX.V read_nPos(); 7NG^X"N{Ul } )mO|1IDTN else "Yw-1h`fR { kE QT[Lo nStartPos = new long[bean.getNSplitter()]; )W9$_<Z nEndPos = new long[bean.getNSplitter()]; @ -pi } CFD& -tED& }x% ;y]S L+Q"z*W qe!`LeT# } HKO00p7 ~X;r}l=k< +) 2c\1 public void run() * bmdY=#7 { Tysh~C|1 //获得文件长度 4&/u1u0 //分割文件 (1\!6 //实例FileSplitterFetch jM1|+o*Wr //启动FileSplitterFetch线程 $5nOi aQL //等待子线程返回 #tG/{R try{ X~abn7_ if(bFirst) 7SYU^GD { O6gI%Jdp nFileLength = getFileSize(); N,|:=gD_ if(nFileLength == -1) ?b, eZ+t { 6
)eO%M` System.err.println("File Length is not known!"); cT^,[3i:c } eG26m_S= else if(nFileLength == -2) M`HXUA4 { |;{^Mci% System.err.println("File is not access!"); c>d+q9M } `.nkC_d else 0}$",M!p { gsufd{{ for(int i=0;i<nStartPos.length;i++) 1vQf=t%lw { Mvoi
nStartPos = (long)(i*(nFileLength/nStartPos.length)); sAS\-c'6 } PIP2(-{ai for(int i=0;i<nEndPos.length-1;i++) SiHZco
I { g<oSTAw nEndPos = nStartPos[i+1]; y]eH@:MJ;A } hf P}+on% nEndPos[nEndPos.length-1] = nFileLength; W|~Lmdzj } msg&~"Z } &O5%6Sv3d ~Bn#AkL "
M8j? //启动子线程 /HH5Mn* fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; (qHI>3tpY for(int i=0;i<nStartPos.length;i++) n5"rSgUtE { 2-nL2f!a{p fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %YefTk8cr, siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 'wz*GMGWC nStartPos,nEndPos,i); D8slSX`6j Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); O-:#Q(H! fileSplitterFetch.start(); yJ8WYQQMG } ftsr-3!Vm // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -tZ2
N siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); PH97O`" // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", a_'W1ek-@ nEndPos = " + nFileLength); q5:-?|jXJ // fileSplitterFetch[nPos.length-1].start(); \^SL Zhe a^i`DrX /Q5pAn -u //等待子线程结束 -wlob`3 //int count = 0; =UA-&x@ //是否结束while循环 i{PRjkR boolean breakWhile = false; g;w4:k)U K^?yD bmna*!l^M while(!bStop) V|
z|H$- { !cT#G write_nPos(); N5csq( Utility.sleep(500); YFOK%7K breakWhile = true; -QCo]:cp 1t=Y+|vA9 (:].?o for(int i=0;i<nStartPos.length;i++) p#'BV'0bl { s0v?*GRX if(!fileSplitterFetch.bDownOver) ~\DC
) { z~+_sTu breakWhile = false; wA)
NB break; j2deb`GD } 6'395x_.\ } ,7SLc+ if(breakWhile) g1muT.W]S break; 3G8BYP DzO0V"+H}k cEi{+rfZd| //count++; W&}YMb //if(count>4) V=k!&xN~ // siteStop(); ui`xgR\6Rh } %Nd|VAe qfvd(w 8qp!S1Qnv System.err.println("文件下载结束!"); 1F-o3\ } k=H{gt
catch(Exception e){e.printStackTrace ();} |~hSK } *RUB`tEL ?2OT :/ I, |uV1S^!A //获得文件长度 a)PBC{I public long getFileSize() )-|A|1Uo { V\%;S int nFileLength = -1; f!e8xDfA try{ #>O,w0<qM URL url = new URL(siteInfoBean.getSSiteURL()); \`jFy[(Pa' HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); #nX0xV5= httpConnection.setRequestProperty("User-Agent","NetFox"); _)p@;vGV n_AW0i. Y1+4ppZ int responseCode=httpConnection.getResponseCode(); s
,\w00-: if(responseCode>=400) Hs~M!eK { _Akc7" processErrorCode(responseCode); ,ZV<o!\ return -2; //-2 represent access is error l!Z>QE`.S } 4O9HoX#-? 7xB#) o53 gl:vJD String sHeader; T,Cq;|g5E t#MU2b c)#b*k,lw< for(int i=1;;i++) B~- VGT2o { 468LVe?0 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ?RiW:TQ* //Utility.log(in.readLine()); +cheLc sHeader=httpConnection.getHeaderFieldKey(i); 5&v'aiWK if(sHeader!=null) tz
j]c { B@e,3: if(sHeader.equals("Content-Length")) *58<.L| { })g|r9= nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); |;6FhDW+' break; ?0hk~8c } 5|NM]8^^0[ } l Vo](#W else LPb43 break; FT/H~|Z> } r.xGvo{iY } Vm_y,;/(-R catch(IOException e){e.printStackTrace ();} c~ l$_A catch(Exception e){e.printStackTrace ();} cz
OhSbmc
N~EM`d ss T o?WL| Utility.log(nFileLength); EyI
9$@4 P9:7_Vc !w]!\H return nFileLength; *y5d&4G2 } &E.0!BuqV *W y0hnr;] U|g4t=@ZR //保存下载信息(文件指针位置) &at>pV3_ private void write_nPos() t<$9!" { ($7>\"+Tl try{ PkF
B. output = new DataOutputStream(new FileOutputStream(tmpFile)); M7Cq)cT output.writeInt(nStartPos.length); :35J<oG for(int i=0;i<nStartPos.length;i++) [esjR`u { ?(*KQ#d // output.writeLong(nPos); @7 &rDZ output.writeLong(fileSplitterFetch.nStartPos); {F6hx9? output.writeLong(fileSplitterFetch.nEndPos); 5b0Ipg } Ko\m8\3?fK output.close(); 7~C@x+1S/ } .=3Sm% catch(IOException e){e.printStackTrace ();} K7M7T5< catch(Exception e){e.printStackTrace ();} ScQJsFE6 } g % q7 ppN96-]^0 |q^e&M< //读取保存的下载信息(文件指针位置) 6aK'%K private void read_nPos() a^iefwsNc { RQy|W}d_ try{ ;dRTr * DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ? =_l=dR int nCount = input.readInt(); ppR~e*rv- nStartPos = new long[nCount]; OQ
5{# nEndPos = new long[nCount]; 1{_tV^3@ for(int i=0;i<nStartPos.length;i++) fxI>FhU_ { .ZxSJ"Rk nStartPos = input.readLong(); ;.V5:,& nEndPos = input.readLong(); KNC!T@O|{# } <po.:c
Ce input.close(); `XP]y= } _Z#yI/5r catch(IOException e){e.printStackTrace ();} Os*,@N3t catch(Exception e){e.printStackTrace ();} yi"V'Us } {{ R/:-6?@ *oY59Yf ?q7VB private void processErrorCode(int nErrorCode) t2BkQ8vr { {O5;V/00} System.err.println("Error Code : " + nErrorCode); f6PXcV
} *hF5cM[ M cNj TD zbddn4bW9 //停止文件下载 $d:/cN
8E public void siteStop() {ogGi/8 { VHM ,W]
bStop = true; |n=m8X for(int i=0;i<nStartPos.length;i++) p !AQ fileSplitterFetch.splitterStop(); 2!~j(_TA B*zb0hdo: {}D8Y_=9\ } Q6_!I42Y` } nrUrMnlg //负责部分文件的抓取 9^4^EY# **FileSplitterFetch.java 58mzh82+ */ N1\u~%AT" package NetFox; \x(J vDt d5T0#ue/e |ZJ]`qmZ import java.io.*; +VdYT6{p import java.net.*; ) Y\} ,O # h/- 16ke CG\ public class FileSplitterFetch extends Thread { J}i$ny_3OB rxI?|}4 8|d lt$ String sURL; //File URL j08G-_Gjn long nStartPos; //File Snippet Start Position FnP/NoZa> long nEndPos; //File Snippet End Position uB
6`e!Q int nThreadID; //Thread's ID tJUMLn? boolean bDownOver = false; //Downing is over U/&?rY^| boolean bStop = false; //Stop identical TA`*]*O( FileAccessI fileAccessI = null; //File Access interface GTYGm D(~6h,=m *=MC+4E public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 8/-GrdyE { \kzxt/Ow this.sURL = sURL; G( nT.\ this.nStartPos = nStart; I=D`:u\H this.nEndPos = nEnd; >
9JzYI^ nThreadID = id; _Eq:Qbw# fileAccessI = new FileAccessI(sName,nStartPos);//定位 BpDf4)| } yh]#V"W3 .',ikez Fng":28o public void run() *Mg=IEu-6[ { bV@53_)N2 while(nStartPos < nEndPos && !bStop) ,`P,)) { A0oC*/ 6}L[7~1
+C/K@:p try{ *VIM!/YW URL url = new URL(sURL); e l'^9K HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); .<u<!fL2 httpConnection.setRequestProperty("User-Agent","NetFox"); _66zXfM< String sProperty = "bytes="+nStartPos+"-"; =k2+VI httpConnection.setRequestProperty("RANGE",sProperty); zIH[
: Utility.log(sProperty);
:?@d\c' +{]/
b%P HzQ6KYAM q InputStream input = httpConnection.getInputStream(); @-qxNw //logResponseHead(httpConnection); oE"! n1y#gC Z!G;q}zZ! byte[] b = new byte[1024]; GaSk&'n$Y int nRead; +TpM7QaL while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) w{F8]N>0< { cGsP0LkHC nStartPos += fileAccessI.write(b,0,nRead); cP$b>3O //if(nThreadID == 1) G&/}P$ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8$v17 3 } P;MS%32 fk*JoR.o >f'nl Utility.log("Thread " + nThreadID + " is over!"); ^-~.L: }q bDownOver = true; .Ky<9h.K //nPos = fileAccessI.write (b,0,nRead); fT[6Cw5w` } gO*cX& catch(Exception e){e.printStackTrace ();} qnrf%rS } &I:X[=;g } Gd%6lab 6\\B{%3R2 > :!faWX //打印回应的头信息 z\_q`43U7 public void logResponseHead(HttpURLConnection con) $SG^, !!&A { qq[2h~6P] for(int i=1;;i++) }!Qo
wG { Tx/ String header=con.getHeaderFieldKey(i);
Ca@[]-_H if(header!=null) -R~;E[
{% //responseHeaders.put(header,httpConnection.getHeaderField(header)); +3si=x\=/ Utility.log(header+" : "+con.getHeaderField(header)); [5)1
4%
x else '3[Ecy# break; dI>)4( ) }
SN?jxQ } Tl8S|Rg NvJu)gI% z|+L>O-8 public void splitterStop() o7/_a/ { 7g bStop = true; m?;)C~[ } |]+m<Dpyr2 Arir=q^2 0Hff/~J } H",yVD 73Mh65 x:xKlPGd /* Ad@))o2 **FileAccess.java F8_pwJUpf- *//文件访问(定位,写) P%'bSx1 package NetFox; "!E(=W? import java.io.*; n_$lRX5 ?tqTG2! ( r5lp<md public class FileAccessI implements Serializable{ DXSZ#^,S[W ;NLL?6~ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 L9fhe,en RandomAccessFile oSavedFile; H!Uy4L~> long nPos; 2?QIK3"v
U QXT&w .X_k[l 9 public FileAccessI() throws IOException .g(yTA { e<~uU9
lg1 this("",0); }`5%2iG } HY5g>wv@ (}4tj4d \dIIZSN public FileAccessI(String sName,long nPos) throws IOException "h$A. S { Bq79Ev
.- oSavedFile = new RandomAccessFile(sName,"rw"); 8@6:UR.) this.nPos = nPos; mEz&:A oSavedFile.seek(nPos); j,6dGb } q$:T<mFK$ nHD4J;l tq<7BO<6 public synchronized int write(byte[] b,int nStart,int nLen) W>wE8? _, { 6/nhz6= int n = -1; <G 2;nvRr try{ 3t68cdFlz oSavedFile.write(b,nStart,nLen); 2~R"3c+^ n = nLen; Z(/jQ=ozQ } vB/MnEKR catch(IOException e) ua`2
&;T= { e{To&gy~ e.printStackTrace (); E^A9u
|x } +c}fDrr) ;OPz T9 ws?p2$ Cla return n; }(op;7 } g3LAi#m N=tyaS(YJ +s1+;VUs3 } /LuwPM jTSw 0\} TeHL=\L-^ /* lG%oqxJ+ L **SiteInfoBean.java o\b8lwA, */ CN\s,. ] package NetFox; .H7"nt^ {r[*}Bv
WZ6!VE{ public class SiteInfoBean { g B+cU Z%(aBz7Et RUX!(Xw private String sSiteURL; //Site's URL h!yF private String sFilePath; //Saved File's Path 7"
Dw4}T private String sFileName; //Saved File's Name FT `y3~ private int nSplitter; //Count of Splited Downloading File Ug3PZ7lK -Zocu<Rs ;#`Z(A} public SiteInfoBean() f7d) {//nSplitter的缺省值为5 Sh2q#7hf //default value of nSplitter is 5 >,uof ? this("","","",5); Xw9,O8}C7 } e)!X9><J ]~3wq[O zHDC8m public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 9OF5A<%"u { "^22Y}VB sSiteURL= sURL; ;\4}Hcg sFilePath = sPath; 5 xTm] sFileName = sName; _V-@95fK this.nSplitter = nSpiltter; ;[gv-H +Nc|cj (;~[}" } s8@f Z4 Be8Gx @8n0GCv public String getSSiteURL() Tk.MtIs)V} { Q}\,7l return sSiteURL;
?o9l{4~g } _f^q!tP&d =Q3Go8b4HJ r;upJbSX public void setSSiteURL(String value) o=;.RYi { $AG.< sSiteURL = value; gq Z7Pro. } uZd)o
AB ;)"r^M)): MSRIG- public String getSFilePath() -Ah \a0z { 3w!oJB return sFilePath; wpx,~`& } )z7.S"U P63z8^y (t<i?>p public void setSFilePath(String value) g>OGh o { k?|VFh1 sFilePath = value; ScZ$&n } f=}u;^ ;u}MG3Y8 oJyC{G public String getSFileName() X=${`n%LG { c7wza/r> return sFileName; P,I3E?! j } uZ<Bfrc ~g1@-)zYxK Qbt
fKn95 public void setSFileName(String value) |])%yRAGQ { m_\CK5T_ sFileName = value; rUx%2O|qu } 3Y=T8Gi# OjrQ[`(E Y<a/(` public int getNSplitter() ^6J*yV% { [h%_` 8z return nSplitter; {'>X6: } 9Ki86 .}Bb
:*@ -cY/M~ public void setNSplitter(int nCount) 0A5xG& { "=4=Q\0PT nSplitter = nCount; 'DntZK } 0vQkm< } "]zq<LmX @OwU[\6fc} ,!sAr;Rk` /* 2HQHC] **Utility.java [>C^ 0\Z~ */ ag|d_; package NetFox; mI0|lp 1$ ks(PH6:]< pSV
8! public class Utility { z81I2?v[Jr BtU,1`El5 r~t&;yRv public Utility() 4XX21<yn { M7jDV|Go R8":1 #& c!w4N5aM } !ZSC" wx<5*8zP //线程睡眠 LjxTRtB_ public static void sleep(int nSecond) F\,3z7s { Y`lC4*g try{ MzJ5_} Thread.sleep(nSecond); "uZ'oN } 8&dmH& catch(Exception e) 0Apvuf1 { M{O2O( e.printStackTrace (); v[F_r } {(xNC#
} Ai#W.
n #-e3m/> //日志 8&`s wu& public static void log(String sMsg) j}0*`[c { <`6-J `. System.err.println(sMsg); joM98H@ } K;[V`)d' fFSW\4JD= OP:;?Fs9` public static void log(int sMsg) tb0s+rb { 9H.E15B System.err.println(sMsg); u7a4taM$d } 9%\q* }
;h BMFpkK9| I"<~!krt% /* ps<JKHC/c **TestMethod.java |mmIu_ */ ?P"ht package NetFox; m;Sw`nw? 3=;iC6
` W-Hw%bwN/q public class TestMethod { VZ_4B *D J5|Dduv
o^DiIoor public TestMethod() yDy3;*lE { ///xx/weblogic60b2_win.exe wW!*"z try{ 0 w@~ynW[ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 2! &:V] //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 9O}YtX2 SiteFileFetch fileFetch = new SiteFileFetch(bean); ,YH^jc fileFetch.start(); p1X
lni%= } Ev$?c9*> catch(Exception e){e.printStackTrace ();} \Sm.]=br [lyB@) 6. <V>vDno\ } tYmWze.j S~Nx;sB <niHJ* public static void main(String[] args) '%K,A-7W { L & PhABZ new TestMethod(); LuQ=i`eXx } /!7m@P|&D } B;7L: 点击下载更多相关资料
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