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/* jn]hqTy8 **SiteFileFetch.java -CtA\<7I */ 7fI[yCh package NetFox; kzJNdYtdH import java.io.*; jtQ2vJ- import java.net.*; U+@yx>! ^=OjsN MukPY2[Am public class SiteFileFetch extends Thread { "}7K>|a kVkV~ @ewQx| SiteInfoBean siteInfoBean = null; //文件信息Bean Y8m|f long[] nStartPos; //开始位置 C([;JO
11[ long[] nEndPos; //结束位置 *3S,XMS{O FileSplitterFetch[] fileSplitterFetch; //子线程对象 (G#)[0<fX long nFileLength; //文件长度 pSE"]N boolean bFirst = true; //是否第一次取文件 wMt?yc:X boolean bStop = false; //停止标志 Y)c9]1qly File tmpFile; //文件下载的临时信息 X]C-y,r[M DataOutputStream output; //输出到文件的输出流 kul&m| ~;UK/OZ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) )uwpeq$j7l public SiteFileFetch(SiteInfoBean bean) throws IOException w gATfygr { ^CZn<$ siteInfoBean = bean; ;?= ] ffa{ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); \ts:' tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); G{+sC2 if(tmpFile.exists ()) =zqOkC
h$ { PS`)6yn{_ bFirst = false; ?h1]s&^|2 read_nPos(); hP3I_I[qF} } 5{,/m"- else zhHQJcQ. { W
qci51y># nStartPos = new long[bean.getNSplitter()]; )P:TVe9` nEndPos = new long[bean.getNSplitter()]; u6t.$a!5 } pL-p xzW]D0o0 ^uIZs}=+ wbd>By(T1 } {-Yp~HQF O:xRUjpL HxU.kcf public void run() sb4r\[? { b=K //获得文件长度 $Jb+}mlT //分割文件 W zy8 //实例FileSplitterFetch NkNw9?:#4 //启动FileSplitterFetch线程 bi#o1jR //等待子线程返回 o2a`4K try{ Kk9 JZ[nT' if(bFirst) 7S2Bm]fP { A3$
rPb8 nFileLength = getFileSize(); %9{4g-> if(nFileLength == -1) CWCE}WU>4 { BI4p 3- System.err.println("File Length is not known!"); ^4B6IF* } yK"U:X else if(nFileLength == -2) c{|soc[# { #(ANyU(#e System.err.println("File is not access!"); =ZzhH};aX } r A0[ y else a(d'iAU8^ { r6PiZgR for(int i=0;i<nStartPos.length;i++) cg1 < { <wj2:Z0 nStartPos = (long)(i*(nFileLength/nStartPos.length)); fJc,KZy } Gp;[WY\ for(int i=0;i<nEndPos.length-1;i++) ;`X -.45 { kl3#&>e nEndPos = nStartPos[i+1]; dE/Vl/ : } 5_G7XBvD/w nEndPos[nEndPos.length-1] = nFileLength; kW6}57iV } ^a<=@0| } WAqR70{KM isWB)$q 'e;*V$+ //启动子线程 [A*vl9= fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Gxm+5q for(int i=0;i<nStartPos.length;i++) |],{kUIXO { 47`{ e_YP0 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), t!D=oBCro siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), fm&l0 nStartPos,nEndPos,i); [#3:CDT Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); HmbTV(lC fileSplitterFetch.start(); GdL\ } 8Nc i1o // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ` mALx! ` siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); w
V27 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 6tzZ j:yq nEndPos = " + nFileLength); Ujq)h:` // fileSplitterFetch[nPos.length-1].start(); FE/&<g0,: ;S,g&%N W%0-SR //等待子线程结束 '~liDz*O //int count = 0; \
{"8(ELX //是否结束while循环 kJJQcjAP: boolean breakWhile = false; W=I%3F_C"R if#$wm% k?|VFh1 while(!bStop) ScZ$&n { N;r,B write_nPos(); rd%3eR?V Utility.sleep(500); >4LX!^V" breakWhile = true; !Q#u
i[0q )bPNL$O u`E_Q8 for(int i=0;i<nStartPos.length;i++) 6Oo'&3@ { *J1pxZ^ if(!fileSplitterFetch.bDownOver) *DDfdn { ;E*^AW breakWhile = false;
,2 &'8:B break; RDzL@xCcn } ``aoLQc` } >%Y.X38Z[ if(breakWhile) >s[}f6*2@ break; c{||l+B +1h^9Y' bTHJb pt*- //count++; 1;ZEuO //if(count>4) ?em )om // siteStop(); <KHB/7 } g.F{yX] F^A1'J $Cc4Sggq System.err.println("文件下载结束!"); #'$CC<*vy } A{&Etu(K catch(Exception e){e.printStackTrace ();} b*P\a } \f /<#' &(Xp_3PO \Cx3^
iX //获得文件长度 ->8n.!F} public long getFileSize() kE6\G}zj { g\ <Lb int nFileLength = -1; ^9cqT2:t try{ UT[KwM{y URL url = new URL(siteInfoBean.getSSiteURL());
JhB{aW> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Fo~C,@/Qt httpConnection.setRequestProperty("User-Agent","NetFox"); 2<u vz<B `pII-dSC% rp(`V@x3 int responseCode=httpConnection.getResponseCode(); &,NHk9.aq if(responseCode>=400) YdC:P#
Nf { J0o U5d=3 processErrorCode(responseCode); _ogT(uYyr return -2; //-2 represent access is error 60X B } ;&JMBn]J #i)h0ML/e :,GsbNKW String sHeader; nM
R_ ?g !aLByMA \ZCc~muR for(int i=1;;i++) )o9CFhFB { ap;*qiNFQ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); i$%;z~#wW //Utility.log(in.readLine()); 63:ZDQ sHeader=httpConnection.getHeaderFieldKey(i); S&.DpsK if(sHeader!=null) G
V0q? { &w/aQs~ if(sHeader.equals("Content-Length")) U$0#j { r}*2~;:pW nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); @["Vzg!I6" break; Z)6bqU<LQE } $Fd9iJ!k } HQf[T@ else
kQX,MP( break; G=~T)e } U%w-/!p } wond>m
3 catch(IOException e){e.printStackTrace ();} %o^'(L@z catch(Exception e){e.printStackTrace ();} 6pr}A OaU$ [Z'8 &?zJ|7rh@| Utility.log(nFileLength); @iWIgL Q#:,s8TW[ To=1B`@- return nFileLength; v]_{oj_(- } oX?2fu- FA4bv9:hi v,p/r)E //保存下载信息(文件指针位置) vQBfT% &Q- private void write_nPos() W dIr3 { hnE@+(d=qJ try{ $7|0{Dw output = new DataOutputStream(new FileOutputStream(tmpFile)); H6'xXS output.writeInt(nStartPos.length); IybMO5Mwn for(int i=0;i<nStartPos.length;i++) yKfRwO[j { ;=UrIA@y;= // output.writeLong(nPos); W P.6ea7k output.writeLong(fileSplitterFetch.nStartPos); 4(B,aU>y output.writeLong(fileSplitterFetch.nEndPos); 2psI\7UjA] } m$[\(Z(/ output.close(); Fnll&TF } |q5\1}@: catch(IOException e){e.printStackTrace ();} ??1V__w catch(Exception e){e.printStackTrace ();} aEX+M57k~ } ?CmW{9O 4fpz;2% B.&q]CAv- //读取保存的下载信息(文件指针位置) `<\AnhNW]I private void read_nPos() 0>E` 9| { _CI! 7% try{ v\\Z[,dK DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 9LCV"xgX int nCount = input.readInt(); ]^aece
t nStartPos = new long[nCount]; -V4@BKI8 nEndPos = new long[nCount]; $C^94$W for(int i=0;i<nStartPos.length;i++) S=M$g#X`5 { JNX7]j\ nStartPos = input.readLong(); "v^Q
! nEndPos = input.readLong(); 8 kd } Pf@8C{I input.close(); k[G? 22t } s "*Cb* catch(IOException e){e.printStackTrace ();} <VgnrqF6: catch(Exception e){e.printStackTrace ();} ze,HNFg@> } 8$3 Tu"+; ^pZ(^ u-j Gv| ,| private void processErrorCode(int nErrorCode) Y
Xn)? { i:{a-Bd System.err.println("Error Code : " + nErrorCode); Y.Gr(]tk } tr/S*0$ &?YQVwsN -Ux/ Ug@ //停止文件下载 ,{:5Z:<| public void siteStop() Fwho.R-. { -Z6ot{% bStop = true; 5:56l>0 for(int i=0;i<nStartPos.length;i++) #l:qht fileSplitterFetch.splitterStop(); Xg.\B1d r7w&p.? >Qt#6X| } /r}t } E!3W_:Bs //负责部分文件的抓取 -
n11L **FileSplitterFetch.java htMpL */
]km8M^P package NetFox; (x?A#o>% T#er5WOH lR;<6 import java.io.*; zy5@K) import java.net.*; \{NeDv{A >JC.qjA [/5>)HK} C public class FileSplitterFetch extends Thread { `iQyKZS/+ =X-$kk C{Aeud #5 String sURL; //File URL y>Nlj%XH long nStartPos; //File Snippet Start Position .KRh59yg long nEndPos; //File Snippet End Position D~2,0K int nThreadID; //Thread's ID ?]$.3azO boolean bDownOver = false; //Downing is over m,)Re8W- boolean bStop = false; //Stop identical (Dc dR:/= FileAccessI fileAccessI = null; //File Access interface N}.h_~6 p3sz32RX a>""MC2 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException HykJ}ezX4 { B`T9dL[E4 this.sURL = sURL; Q"QrbU this.nStartPos = nStart; -41L^Di\ this.nEndPos = nEnd; .}a@OLJd nThreadID = id; )+\e+Ad}H fileAccessI = new FileAccessI(sName,nStartPos);//定位 MO/l(wO } L`];i8=I c5O1h8 =\oNu&Q^ public void run() R,6?1Z:J { EeL~`$f while(nStartPos < nEndPos && !bStop) !~>u\h { qK(?\t$ S}fIZ1 6=|Q>[K try{ !cWKY\lpv URL url = new URL(sURL); !X
|Tf HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %T1(3T{Li httpConnection.setRequestProperty("User-Agent","NetFox"); > `z^AB String sProperty = "bytes="+nStartPos+"-"; Z$6W)~;, httpConnection.setRequestProperty("RANGE",sProperty); |%b' L.$4 Utility.log(sProperty); &z%7Nu Vf O0 z5& D>LdDhNn,` InputStream input = httpConnection.getInputStream(); k('2K2P //logResponseHead(httpConnection); &b{L|I'KYT 7!L"ef62o +F+jC9j(< byte[] b = new byte[1024]; ,4EE9
?J int nRead; #[Ns\%Ri0 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ZTHrjW1 { ?4gYUEM# nStartPos += fileAccessI.write(b,0,nRead); ~~wz05oRG
//if(nThreadID == 1) Z(.p=Wg // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); mxDy!:@= } INcJXlv mlIc`GSI =`.9 V< Utility.log("Thread " + nThreadID + " is over!"); Nu|?s- bDownOver = true; 9>[$;> //nPos = fileAccessI.write (b,0,nRead); #J1a `}x } s}/YcUK catch(Exception e){e.printStackTrace ();} OG}0{? } E-Cj^#OY|N } >/evL
/ ~Dgui/r9J Sh{odrMj* //打印回应的头信息 |)GE7y0Q public void logResponseHead(HttpURLConnection con) <fN?=u+ { u3"F7
lJ for(int i=1;;i++) X8?|5$Ey { 4sROMk=l String header=con.getHeaderFieldKey(i); [+ 1([# if(header!=null) )mp0k% //responseHeaders.put(header,httpConnection.getHeaderField(header)); VYlg+MlT0 Utility.log(header+" : "+con.getHeaderField(header)); [(UQQa=+ else uw;s](~E break; H^'EY:| } VZw( "a*TB } >;0z-;k6 4[rD| 9u"im+=: public void splitterStop() @Q TG { Z#^2F8,] bStop = true; &W|'rA'r } S@Jl_`< 85Ms*[g Y@;bA=Du} } /kNr5s aD0w82s]J ka"jv"z /* g/JAr< **FileAccess.java -+?0|>Nh *//文件访问(定位,写) qH"0?<$9 package NetFox; Ntg#-_] import java.io.*; 0^{zq|%Q! M!mTNIj8~ =XudL^GF public class FileAccessI implements Serializable{ Awe\KJ^` WET $H, //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 5%,n[qj4IT RandomAccessFile oSavedFile; .DCp)&m
l; long nPos; }RW4 BOfO$J} %Sxy!gGz%% public FileAccessI() throws IOException \h_hd%'G { ${e(#bvGZ this("",0); tHhY1[A8m } 6S]GSS< [yjC@docH iY.~N#Q public FileAccessI(String sName,long nPos) throws IOException `M"b L|[R { "eGS~-DVK oSavedFile = new RandomAccessFile(sName,"rw"); xI_WkoI this.nPos = nPos; QT^(
oog= oSavedFile.seek(nPos); zXZy:SD } pmHd1 Wub QIo|t!7F 7Zr jU{ public synchronized int write(byte[] b,int nStart,int nLen) <%) :'0q& { u%v^(9z int n = -1; s7df<dBC try{ r|0C G^:C oSavedFile.write(b,nStart,nLen); Re,0RM\ n = nLen; ^!Bpev } ,gD30Pylz catch(IOException e) mX,#|qLf { } vcr71u e.printStackTrace (); ZOS{F_2. } 5p"*nkF t41\nTZr ki}Uw# return n; G|Q}.v } F-_RL-hbN% Rp. @
Ia>qVM0 } ^JYR^X>_ t}NxD`8 &
}k=V4L /* l\MiG Na **SiteInfoBean.java aU#8W.~ */ M(oW;^B package NetFox; <2|x]b8 @0B<b7Jv F~RUb&*/< public class SiteInfoBean { 1Kwl_jf ilFM+x@ R Af+%h* private String sSiteURL; //Site's URL &QCqaJ- private String sFilePath; //Saved File's Path V 9=y@`; private String sFileName; //Saved File's Name 15 nc private int nSplitter; //Count of Splited Downloading File f
( UcJx Fi*6ud\n! r@s, cCK9? public SiteInfoBean() Km\M/j| {//nSplitter的缺省值为5 !M3IuDN //default value of nSplitter is 5 :!{aey this("","","",5); uiHlaMf } Y^3tk}yru X3a:*1N b/ZX}<s(1= public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) :(I)+;M}P { @JN%P}4) sSiteURL= sURL; _k6N(c2Nd sFilePath = sPath; 4Ag+ sFileName = sName; U.>n]/& this.nSplitter = nSpiltter; ,9W 0fm\t t}*teo[ 3PBg3Y$ } !gJAK<]iW R<JI Hi.JL public String getSSiteURL() = ng\ { 5<d
Y,FvX return sSiteURL; P=u )Q _ } nc$?tC9V |L]dJ< lzuPE,h public void setSSiteURL(String value) x-%nnC6e { h"ZF,g;a sSiteURL = value; d@#=cvW } paMw88*u *%8,G'"r? %tQIKjsVaY public String getSFilePath() Mc@p~5!M { NK"y@)%0 return sFilePath; QRt(?96
} }14.u&4 ]G|@F
: "q]v2t public void setSFilePath(String value) u45e>F= { V|b?H6Q sFilePath = value; \a|gzC1G } YK"({Z>U ZO0_:T#Z _KD(V2W public String getSFileName() ijoR(R^r { R`s /^0 return sFileName; )NyGV!Zuu } t'[vN~I' $,6= .YuY 6 t A?<S public void setSFileName(String value) S:^Q(w7 { z!RA=]3h sFileName = value; Z39^nGO } >1joCG~ 3zh'5qQ kTFN.kQx@ public int getNSplitter() ;B1}so1] { lkw[Z}\ return nSplitter; L i< c } k$I[F<f Dw.>4bA. B5tJ|3! public void setNSplitter(int nCount) eeL%Yp3+ { ~r>WnI:vg nSplitter = nCount; gb@!Co3 } < u^41 } Ww8C![ , b<:s{f"t, egP3q5~ /* kW-5H;> **Utility.java #!,xjd */ T,H]svN5p package NetFox; XP{ nf9& ;gW~+hW ^ qTffh{q V public class Utility { dB_\,%vAd ]FFU,me2 /Ee0S8!Z!1 public Utility() .h7b 4J { sav2 .w MfYe @;m 1noFXzeU3 } fcV/co_S6 [5m;L5 //线程睡眠 ?*4]LuK6 public static void sleep(int nSecond) LO` (V { `w~ 9/sty try{ -3w? y Thread.sleep(nSecond); nS4~1a } yK}#|b'cM catch(Exception e) d628@~Ekn { *riGi e.printStackTrace (); RmzK?muk } />f`X+d } Nwu#,f=X nLQ X?: //日志 ^[id8 public static void log(String sMsg) 4|XE
f, { hs/nM"V
System.err.println(sMsg); +x+H(of. } "bw4{pa+ x80~j(uVf "`&?<82 public static void log(int sMsg) ZS}2(t { EoOrA@N System.err.println(sMsg); (tVY
/(~# }
!N)oi$T% } Qh{=Z^r gu"Agct4 'fg`td /* aC%0jJ<eo **TestMethod.java 2b3*zB*@V */ *nH ?o* # package NetFox; Zj}DlNkVu |d,1mmv@K ^ro?.,c T public class TestMethod { S++}kR);
ZZeqOu7^ u\Xi]pZ@X] public TestMethod() b LxV { ///xx/weblogic60b2_win.exe wS:323
!l$ try{ <'gCI Ia2 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); sL!6-[N //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); =B?uNo e SiteFileFetch fileFetch = new SiteFileFetch(bean); @l@lE0 fileFetch.start(); UO!OO&l! } !\"C<*5 catch(Exception e){e.printStackTrace ();} !CsoTW9C: SJy? ^ QDgOprha } _`;6'}]s QY{f= b [u_r,b public static void main(String[] args) ,:,c
kul { 9OTw6 new TestMethod(); 0J_Np } 40 :YJ_n } Q)Ppx 7) 点击下载更多相关资料
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