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/* pW3^X=6 **SiteFileFetch.java q(84+{>B */ vr=#3> package NetFox; +CNv l import java.io.*; ( a#BV}= import java.net.*; v.qrz"98- &tj!*k' 4.t-i5 public class SiteFileFetch extends Thread { ^ [@, /%^#8<=|U 4Fr
SiteInfoBean siteInfoBean = null; //文件信息Bean N~'c_l long[] nStartPos; //开始位置 D*d]aC long[] nEndPos; //结束位置 ]t"Ss_, FileSplitterFetch[] fileSplitterFetch; //子线程对象 PEZ!n.'S long nFileLength; //文件长度 oOFVb5qoFU boolean bFirst = true; //是否第一次取文件 4o[{>gW boolean bStop = false; //停止标志 "^GGac. File tmpFile; //文件下载的临时信息 \dah^mw" DataOutputStream output; //输出到文件的输出流 )Pv%#P-< k8zI(5.> //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) +
{'.7# public SiteFileFetch(SiteInfoBean bean) throws IOException uwGc@xOgg, { A.w.rVDD siteInfoBean = bean; 'm$L Ij?@ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); DN6Mo<H tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 3u0RKLc\ if(tmpFile.exists ()) Iu=(qU { f3y=Wxk[ bFirst = false; c-sfg>0 ^ read_nPos();
El8,,E } |2A:eI8 ^ else y?3;06y| { K{+2G&i nStartPos = new long[bean.getNSplitter()]; KMax$ nEndPos = new long[bean.getNSplitter()]; t%8BK>AHvw } G 01ON0 S,8elKH4 &$H!@@09|w =7UsVn#o } 5)X=*I cFX p GTHt'[t@; public void run() R=\IEqqsi { ~a2}(] //获得文件长度 !dq.KwL //分割文件 w,D+j74e$ //实例FileSplitterFetch j1<Yg,_.p //启动FileSplitterFetch线程 E!F^H^~$8 //等待子线程返回 &UFZS94@r try{ ~wdGd+ez if(bFirst) #AY&BWS$ { gjlx~.0d nFileLength = getFileSize(); +lTq^4 if(nFileLength == -1) \Vk:93OH21 {
Q+{n-? : System.err.println("File Length is not known!"); Nz-&MS } );YDtGip J else if(nFileLength == -2) %BQ`MZ { BnY&f System.err.println("File is not access!"); Q,Eo mt } k;Y5BB else kq-) ^,{y { 19#\+LWA for(int i=0;i<nStartPos.length;i++) D2O~kNd { 3OB"#Ap8< nStartPos = (long)(i*(nFileLength/nStartPos.length)); &7s.` } 4skD(au8 for(int i=0;i<nEndPos.length-1;i++) %a7$QF] { e|r`/:M nEndPos = nStartPos[i+1]; x?<FJ"8"k } B#R|*g:x nEndPos[nEndPos.length-1] = nFileLength; EdX$(scu~B } NHE18_v5 } !VzC&>'v^9 ~$J2g ia?
c0xL //启动子线程 B)UZ`?>c fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; yt2PU_), for(int i=0;i<nStartPos.length;i++) RM/ 0A| { E?@m?@*/ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), CvdN"k siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), : rVnc =k nStartPos,nEndPos,i); cz$2R Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /mZE/>&~, fileSplitterFetch.start(); Zwx%7l;C } 19] E 5'AI // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !<h)w#>en siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); xyxy`qR A // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", @(lh%@hO nEndPos = " + nFileLength); l+b~KU7~l // fileSplitterFetch[nPos.length-1].start(); |vC~HJpuv' E" vS $ hqdDm //等待子线程结束 1 -b_~DF //int count = 0; $pz/?>! //是否结束while循环 +cRn%ioVi boolean breakWhile = false; [N'h%1]\ t#yuOUg VtohL+ while(!bStop) h@BY]80 { wgA_38To write_nPos(); y)<q/ Utility.sleep(500); to&m4+5?6 breakWhile = true; [-x7_=E# k;W
XB|k `H+lPM66 for(int i=0;i<nStartPos.length;i++) oL<St$1 { K Y^Z if(!fileSplitterFetch.bDownOver) "wc<B4" { 2Z%O7V~u breakWhile = false; D43z9z-:L break; ss-D(K" } e:W{OIz: } c*M}N?|6 if(breakWhile) I}Q2Vu< break; XfmwVjy Q@H V- (A i mM_H;-X //count++; 0CvUc>Pj`" //if(count>4) -{A<.a3P}= // siteStop(); J8D,ZfPN`d } o" SMbj QS j]ZA L%5%T;0'~ System.err.println("文件下载结束!"); \j.:3Xr } p4)Q&k! catch(Exception e){e.printStackTrace ();} wNX]7wMX } ?%kV?eu' |7Kbpj S[QrS7 //获得文件长度 E)3NxmM# public long getFileSize() C*lJrFpB { (iGTACoF int nFileLength = -1; B?wq=DoG try{ zMJT:7*`| URL url = new URL(siteInfoBean.getSSiteURL()); Wez5N HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q=:|R3U/ httpConnection.setRequestProperty("User-Agent","NetFox"); BORA(, LHmZxi? .8|X int responseCode=httpConnection.getResponseCode(); eiOW#_"\ if(responseCode>=400) 9ll~~zF99| { "ITIhnE processErrorCode(responseCode); 5(8@%6>ruj return -2; //-2 represent access is error Ct|A:/z( } _aMF?Pj~m 'H!XUtFs" FgI3 String sHeader; l+0P ?hM64jI| 3ANQaUC for(int i=1;;i++) A(N4N { \di= //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); XZwK6F)L //Utility.log(in.readLine()); c"xK`%e sHeader=httpConnection.getHeaderFieldKey(i); \C1nZk?3 if(sHeader!=null) ,=N.FS { $7uA%|\ if(sHeader.equals("Content-Length")) HorDNRyu { p<;0g9,1 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ,Lt[\_ break; iyog`s c } 39jG8zr=Z[ } -{+}@? else w*MpX
U< break; wdZ/Xp9] } #89!'W } =rK+eG#, catch(IOException e){e.printStackTrace ();} >OK^D+v"j catch(Exception e){e.printStackTrace ();} 8.~kK<)! E~:x(5'%d jA/w|\d! Utility.log(nFileLength); D,ln)["xm Q3SS/eNP TOAAQ return nFileLength; 6`-jPR } ,?XCyHSgWW bYPK h c0fo7| //保存下载信息(文件指针位置) 3[f):
u3" private void write_nPos() <^uBoKB/f { 3D(0=$W try{ <Ok3FE.K output = new DataOutputStream(new FileOutputStream(tmpFile)); o8vug$=Z output.writeInt(nStartPos.length); nNU2([ for(int i=0;i<nStartPos.length;i++) 4H<lm*!^ { ?0,Ngrbe // output.writeLong(nPos); dq[xwRU1 output.writeLong(fileSplitterFetch.nStartPos); DFTyMB1H output.writeLong(fileSplitterFetch.nEndPos); "wHFN>5B } 8e|%M output.close(); :a)u&g@G } ?pZOeqqu$ catch(IOException e){e.printStackTrace ();} kSh( u catch(Exception e){e.printStackTrace ();} ?F;8Pa/ } !v0LBe4 >dG[G> C>w|a //读取保存的下载信息(文件指针位置) 6MkP |vr6 private void read_nPos() w+{LAS { OydwE try{ O0y_Lm\ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); -D$8 int nCount = input.readInt(); m9Hit8f@Q nStartPos = new long[nCount]; i7>tU= nEndPos = new long[nCount]; bY0|N[g for(int i=0;i<nStartPos.length;i++) n.G!43@*N { VU d\QR- nStartPos = input.readLong(); !GGkdg*-*9 nEndPos = input.readLong(); I.k
*GW } 6i~WcAs input.close(); Ue~CwFOc } LE>]8[f6S catch(IOException e){e.printStackTrace ();} d<N:[Y\4l catch(Exception e){e.printStackTrace ();} `$C
n~dT } \;"=QmRD%: w*JGUk d;}nh2* private void processErrorCode(int nErrorCode) #ucBo<[ { & 9 ?\b7 System.err.println("Error Code : " + nErrorCode); )%@J=&G8TT } qm o9G 0=E]cQwh 4Wm@W E //停止文件下载 l2P=R)@{ public void siteStop() 'CkIz"Wd { $'hEz/ bStop = true; n#OB%@]<V for(int i=0;i<nStartPos.length;i++) %Q dn fileSplitterFetch.splitterStop(); d4c8~L
H- )f<z%:I+Z }d}Ke_Q0 } X*@dj_, } RuVGG) //负责部分文件的抓取 ` v@m-j6 **FileSplitterFetch.java -I,$_ */ cq/$N package NetFox; 'u |c FE|JHh$ (jl
D+Y_ import java.io.*; 6MMOf\
import java.net.*; cP_.&!T I75DUJqy] &AbNWtCV+G public class FileSplitterFetch extends Thread { -0x
# \ Et3|Iv (S\[Y9
String sURL; //File URL zsyIV!( long nStartPos; //File Snippet Start Position #KexvP&* long nEndPos; //File Snippet End Position orMwAV int nThreadID; //Thread's ID aH/
k Ua boolean bDownOver = false; //Downing is over
k5.Lna boolean bStop = false; //Stop identical X))/ m[_[ FileAccessI fileAccessI = null; //File Access interface <s<n S2GxV/E p xa*'h"b^ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException PKg@[<g43 { U6fgo3RH this.sURL = sURL; R3&Iu=g this.nStartPos = nStart;
MC.)2B7 this.nEndPos = nEnd; V7fq4O^: nThreadID = id; "N bq#w\ fileAccessI = new FileAccessI(sName,nStartPos);//定位 /zVOK4BqN+ } WX|`1b
qwgPk9l j0evq+ public void run() Ata:^qI { 1 +{{EOZ4 while(nStartPos < nEndPos && !bStop) %oa-WmWm { ywm8N%]v Hp!-248 S hVAn>_( try{ RF53J yt URL url = new URL(sURL); "2$fi{9 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 'Nnz k httpConnection.setRequestProperty("User-Agent","NetFox"); ""F5z,' String sProperty = "bytes="+nStartPos+"-"; f=gW]x7'R+ httpConnection.setRequestProperty("RANGE",sProperty); V/
uP%'cd Utility.log(sProperty); k(7&N0V%zz iYm-tsER; .P%bkD6M InputStream input = httpConnection.getInputStream(); `1{ZqRFQ //logResponseHead(httpConnection); F]]]y5t q" sed] -g Sa_8R
byte[] b = new byte[1024]; %JD,$pPs int nRead; dkBIx$t while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^{;oM^Q' { Z<y I\1 nStartPos += fileAccessI.write(b,0,nRead); [KaAXv
.X //if(nThreadID == 1) ^-Kf']hU // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); V0.vQ/ } d#rf5<i as4;: Pz |>"' Utility.log("Thread " + nThreadID + " is over!"); u^bidd6JRn bDownOver = true; sF?TmBQ* //nPos = fileAccessI.write (b,0,nRead); Jg\zdi:t } j0S#>t catch(Exception e){e.printStackTrace ();} 1&evG-#<: } Gm.T;fc: } ujq=F 9gEwh< C>j@,G4 //打印回应的头信息 ]kRfB:4ED public void logResponseHead(HttpURLConnection con) "ZoRZ'i { z] PSpUd for(int i=1;;i++)
}mq6]ZrK { wyj{zWRJp String header=con.getHeaderFieldKey(i); xU>WEm2 if(header!=null) a# y;dK //responseHeaders.put(header,httpConnection.getHeaderField(header)); l%pu HZ)t Utility.log(header+" : "+con.getHeaderField(header)); 5Y'qaIFR else ~f1%8z break; lVR~Bh } _j/<{vS y } #TX/aKr: E+R1 !. q`H_M{26!y public void splitterStop() mD0f<gJ1 { ith
3=`3 bStop = true; M!A}NWF } A8fOQ ;F!5%}OcL% iWB=sL&p } aS{n8P6vW (*nT(Adk [.'|_l /* y'~U%,ki6 **FileAccess.java +]A:M6P:{v *//文件访问(定位,写) 3kIN~/<R+7 package NetFox; Ym{tR,g7 import java.io.*; ?U5{Wa85D 6?mibvK C] eSizS. public class FileAccessI implements Serializable{ '}JhzKNj X!Mx5fg //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 B=yqW RandomAccessFile oSavedFile; K{cD+=]{ long nPos; DV+xg3\(>1 t?ZI".> ^ft>@=K(| public FileAccessI() throws IOException YEs & { R{3N&C this("",0); YX7L?=;.@ } *:YiimOY" !M]uL&: $L>@Ed< public FileAccessI(String sName,long nPos) throws IOException >#;.n(y { BNl5!X^{ oSavedFile = new RandomAccessFile(sName,"rw"); c74.< @w this.nPos = nPos; 6C^
D#.S oSavedFile.seek(nPos); m
)zUU } -MO#]K3< ./k/KSR @ ZwvBH public synchronized int write(byte[] b,int nStart,int nLen) G5RR]?@6V { Zq|I,l0+E int n = -1; t#/YN.@r try{ !t%j?\f oSavedFile.write(b,nStart,nLen); VT%NO'0 n = nLen; trA4R/
& } :P\7iW catch(IOException e) Ic:(Gi- % { ,I$`-$_' e.printStackTrace (); el<s8:lA } WZejp}x e7r-R3_ Sh~dwxp*" return n; Ae^~Cz1qz } 3!Ij;$ t r3!d_ ?|C2*?hZ+ } %lx!.G @* jz
o i2U{GV<K-r /* He/8=$c% **SiteInfoBean.java +I:Unp */ };bEU wGWf package NetFox; nQtWvT uR4z&y PbgP\JeX public class SiteInfoBean { "f2$w 9:[ 9v Lpz>>} private String sSiteURL; //Site's URL ,GIyq) private String sFilePath; //Saved File's Path `?qF$g9u~ private String sFileName; //Saved File's Name n;Q7X>-f8` private int nSplitter; //Count of Splited Downloading File g i-$ZFzB :&rt)/I H8zK$! public SiteInfoBean() \*y-g@-{W$ {//nSplitter的缺省值为5 V-2(?auZd //default value of nSplitter is 5 v0+BkfU+p this("","","",5); 4qh?,^Dq } \0I_< #n#}s n;C
:0 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Apag{Z]^B { m@F`!qY~Y\ sSiteURL= sURL; ~&_z2|UXp sFilePath = sPath; x8\?}UnB sFileName = sName; JCzeXNY this.nSplitter = nSpiltter; =sU<S,a* D~iz+{Q4 -1_)LO&H } !bx;Ta. e8!5I,I 8oseYH public String getSSiteURL() ")5":V~fN { syj0.JD return sSiteURL; l
-m fFN } {n.PF8A5X El".I?E* 7\[@m3s public void setSSiteURL(String value) :T$|bc { r~8 $1" sSiteURL = value; q=m'^
,gPS } <C iSK! ]t,BMu=% O`\;e>!t public String getSFilePath() @6sqMw} { Hqx-~hQO return sFilePath; KYhw OGN } b<ZIWfs 9(7-{,c _p/UsJ public void setSFilePath(String value) aEWWP] { ^j7Vt2- sFilePath = value; 6=/F$| } A#<? 4& V>LwqS~` .},'~NM] public String getSFileName() .bg~>T+< { l0m-$/ return sFileName; EU;9*W< } >dD@j:Qc
(@VMH !3 70nqD>M4 public void setSFileName(String value) L,`LN> { X-Kh(Z sFileName = value; 2(+2+} } q`a'gJx#y 1#2 I @%uUiP0 public int getNSplitter() @ioJ]$o7 { E_wCN&`[ return nSplitter; [ /b2=> } g2ixx+`?|: lU\[aNs ]^7@}Ce_ public void setNSplitter(int nCount) h"Q8b}$^) { b3[!V{| nSplitter = nCount; !hy-L_wL] } q!7ANib6O } UnV.~ u~ ,PW'#U: <2x^slx)? /* i$#;Kpb`^ **Utility.java 5H9z4-i x? */
gPO}d package NetFox; KYI/ TDjm2R~9FS "m8^zg hL public class Utility { @n /nH?L ~jk|4`I?T tw/dD + public Utility() 9:|{6_Y { #q$HQ&k ZJJY8k ` O
_ gGf } lgy<?LI\ !i}w~U< //线程睡眠 8/cX]J public static void sleep(int nSecond) 5Ln,{vsv { M
FMs[+2_o try{ BwpqNQN Thread.sleep(nSecond); &wawr2)} } Q"d^_z]K catch(Exception e) &PHTpkaam { ;xj?z\=Pg e.printStackTrace (); |SSSH
} /C:gKy4
} : *#- %0 o5PO=AN //日志 rXP,\ ]r+ public static void log(String sMsg) AV]2euyn { my1@41
H System.err.println(sMsg); l|[N42+ } *:7rdzn v!-pSa)3 qYQl,w public static void log(int sMsg) !9e=_mY { ~G&dqw/.-U System.err.println(sMsg); `/+>a8 } %aCqi(.7 } i1d'nxk6 EME|k{W ]s'as9s9 /* Q3~H{)[Kq **TestMethod.java a58H9w"u) */ fTec package NetFox; 9W5lSX#^; ;H*T^0 eo?bL$A[s public class TestMethod { ;igIZ$& |wMN}bq|T s ll\g public TestMethod() ]F~dlH1Wp { ///xx/weblogic60b2_win.exe %[TR^Th6 try{ :3Ox~o SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); |HQW0 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); !;A\.~-!G SiteFileFetch fileFetch = new SiteFileFetch(bean); ;$|nrwhy fileFetch.start(); \gaw6S>n} } Wn2NMXK catch(Exception e){e.printStackTrace ();} ^^$s%{ep" IEi^kJflU U7F!Z(
9 } B9z?mt'|r) JH9J5%sp LH% F8 public static void main(String[] args) vvMT}-! { CAhXQ7w'Z new TestMethod(); FW4<5~'
} 6nvz8f3*r] } #c!lS<z 点击下载更多相关资料
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