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/* ?,!qh **SiteFileFetch.java v14[G@V~\ */ \GkcK$Y package NetFox; 6D+9f{~r import java.io.*; Xak~He import java.net.*; {Cd*y6lI LO2sP"9 ffWvrY;j[ public class SiteFileFetch extends Thread { N$3F4b%+ [m"X*ZF )HmpVH SiteInfoBean siteInfoBean = null; //文件信息Bean ePF9Vzq long[] nStartPos; //开始位置 leiza?[ long[] nEndPos; //结束位置 {4I sz-P FileSplitterFetch[] fileSplitterFetch; //子线程对象 SQHVgj long nFileLength; //文件长度 g"!B
| boolean bFirst = true; //是否第一次取文件 t9=rr>8) boolean bStop = false; //停止标志 |?0C9 File tmpFile; //文件下载的临时信息 ;m\(fW*ii DataOutputStream output; //输出到文件的输出流 QOO BCNe 9:m+mpL=9 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 6tJM*{$$H public SiteFileFetch(SiteInfoBean bean) throws IOException |_A35"v { 1wq6E siteInfoBean = bean; -}>Q0d ) //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Z2ZS5a tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); c2i^dNp_ if(tmpFile.exists ()) QTDI^ZeuF { @Wv*` bFirst = false; ' E@D read_nPos(); AvwX 2?tc } T|=8jt, else E;X'.7[c { 's9)\LS>p nStartPos = new long[bean.getNSplitter()]; sPhh#VCw{ nEndPos = new long[bean.getNSplitter()]; xOt|j4 } Q[k}_1sWs$ g6~uf4; h;Bol :xA'X+d/' } SAqX[c 6dNo!$C^ ;+5eE`]a/L public void run() 7[K$os5al { %8v?dB;>x` //获得文件长度 ,,6e }o6 //分割文件 /1^%32c //实例FileSplitterFetch [k.<x'# //启动FileSplitterFetch线程 v3[
2!UXq //等待子线程返回 7N:,F9V< try{ #-{4 Jx if(bFirst) h qxe { m=#2u4H4 nFileLength = getFileSize(); ptsi\ 7BG if(nFileLength == -1) tIRw"sz { BeVQ[ System.err.println("File Length is not known!"); a~{mRh } N".
af)5 else if(nFileLength == -2) ;MO
%)) { i
JQS@2=A System.err.println("File is not access!"); :0]KIybt } vm Hf$rq else Dl7#h,GTc< { _|#)tWy} for(int i=0;i<nStartPos.length;i++) z7GLpTa { \Q
&Kd| nStartPos = (long)(i*(nFileLength/nStartPos.length)); 2AdV=n6Z } gXF.e.uU for(int i=0;i<nEndPos.length-1;i++) P ^D\znvc { No h*1u* nEndPos = nStartPos[i+1]; h<}4mo_$ } ^c/.D*J[I nEndPos[nEndPos.length-1] = nFileLength; -ERDW Y } JWEqy+,Fjw } 9_&.G4%V QYg2'`( x=9drKIw> //启动子线程 B>JRta;hj fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; iptzVr#b[ for(int i=0;i<nStartPos.length;i++) Bf8 #&]O { a*o=,! fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), UD.$C siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), b2 ZKhS8 nStartPos,nEndPos,i); VRT| OUq Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -`A6K!W&~p fileSplitterFetch.start(); &L;0% } RU@`+6j+ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), pvcD
61, siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); &t`l,]PQ=6 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", lh
.p`^v nEndPos = " + nFileLength); {6RT&w // fileSplitterFetch[nPos.length-1].start(); `Up3p24 2'N%KKmJL B1\}'g8%f //等待子线程结束 Yz[^?M%(D //int count = 0; 3>-^/ //是否结束while循环 }]/"auk boolean breakWhile = false; 2x t
8F zsWYV n] f BukrPsV while(!bStop) GsxrqIaD { q.~_vS% write_nPos(); Kc0KCBd8]; Utility.sleep(500); *Z<`TB)<X breakWhile = true; pYH#Vh s_u@8e 6_ va| 1N/& for(int i=0;i<nStartPos.length;i++) LG@5Z- { L%Me
wU0TZ if(!fileSplitterFetch.bDownOver) oS, %L { =M>pL+# breakWhile = false; F!'y47QD break; tpU[KR[- } *i&ks>4N } bF<FX_}!s! if(breakWhile) 8|HuxE break; }H\wed]F/ M2{{B^*$6 '
FF@I^O //count++; REli`"bR //if(count>4) oBpHmMzA // siteStop(); 4Y;z46yM% } iJT_*,P^ )Z,O*u* g>cp;co9g System.err.println("文件下载结束!"); =:uK$>[ } X=8y$Yy catch(Exception e){e.printStackTrace ();} }f/ 1 } )|zLjF$ Etj@wy/E ~#C7G\R //获得文件长度 9-5H~<}fF public long getFileSize() 4v_<<l { FxW~Co int nFileLength = -1; 3)3?/y)_ try{ jEo)#j];`< URL url = new URL(siteInfoBean.getSSiteURL()); 59 R;n.Q HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !#Ub*qY1Z httpConnection.setRequestProperty("User-Agent","NetFox"); i]Njn k scT,yNV $qV, z int responseCode=httpConnection.getResponseCode(); V9mqJRFJ: if(responseCode>=400) \C#XKk$OE { \QGh@AQp" processErrorCode(responseCode); Y{ijSOl3 return -2; //-2 represent access is error 49W@?:b } yb\T<* s IJl9 C8W#$a String sHeader; 2<q>]G-nN =^\yE"a zmB6Y
t for(int i=1;;i++) &{-r 5d23 { m<}>'DT //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 6#hDj_(, //Utility.log(in.readLine()); IOhJL'r sHeader=httpConnection.getHeaderFieldKey(i); UuPXo66F] if(sHeader!=null) V"K-aO& { XYj!nx{k, if(sHeader.equals("Content-Length")) ])`w_y(> { %Ya%R@b} nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); W8,4LxH break; Ve)P/Zz}^ } GJS3O;2* } D~P3~^ else hg4 d]R, break; tpPP5C{ } RUco3fZ } >}?jO B catch(IOException e){e.printStackTrace ();} A{NKHn>%` catch(Exception e){e.printStackTrace ();} 4&N#d;ErC Pw+PBIGn4 JbX"K< nQ Utility.log(nFileLength); Mu: y9o95 }:+SA QP>tu1B| return nFileLength; IyK^` y } 6Ft?9
B(F: 0gTv:1F/ Rxb?SBa //保存下载信息(文件指针位置) 3u[m? Vw private void write_nPos() lDsT?yHS`Z { nQ*9E|Vx try{ X\4d|VJ?m output = new DataOutputStream(new FileOutputStream(tmpFile)); fJ<I|ZZ output.writeInt(nStartPos.length); iq1HA.X( for(int i=0;i<nStartPos.length;i++) .bYZkO:oy { &X3G;x2; // output.writeLong(nPos); 2i0 .x output.writeLong(fileSplitterFetch.nStartPos); 3']a1\sy^ output.writeLong(fileSplitterFetch.nEndPos); <$z6:4uN_ } W>#[a %R output.close(); #
RoJD:9 } NVnId p catch(IOException e){e.printStackTrace ();} L!;"73,&(8 catch(Exception e){e.printStackTrace ();} r+:]lO } C GN=kQ YN]xI $;iMo/ //读取保存的下载信息(文件指针位置) c!0u,6 private void read_nPos() Ms=5*_J2Jk { =M6Ph% try{ \rj>T6 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); d6^:lbj int nCount = input.readInt(); eR3v=Q nStartPos = new long[nCount]; kI?+\k\V` nEndPos = new long[nCount]; u*}ltR~/ for(int i=0;i<nStartPos.length;i++) YuXCRw9p; { <?Ln`,Duk nStartPos = input.readLong(); pl}nbY nEndPos = input.readLong(); C]EkVcKFA } *c<6 Er>s input.close(); OI^??joQ } ^ YOCHXg catch(IOException e){e.printStackTrace ();} PfR|\{( catch(Exception e){e.printStackTrace ();} 2t7P| b~V1 } g?.y7!m ]SC|%B_* R?t_tmKXC! private void processErrorCode(int nErrorCode) <uYrYqN { 4%B0H> System.err.println("Error Code : " + nErrorCode); #Z. QMWq } o;TS69|D pKtN$Fd J8'1 ~$6 //停止文件下载
?kIyo public void siteStop() "hmLe(jo} { '@/1e\ -y bStop = true; -1{f(/ for(int i=0;i<nStartPos.length;i++) ;A6%YY fileSplitterFetch.splitterStop(); +0ALO%G;G" _`I}"`2H *z'v } WKAG)4 } T>hrKn.!D: //负责部分文件的抓取 ?:tk8Kgf **FileSplitterFetch.java gc\/A\F< */ <78*-Ob package NetFox; 5jq @ nq6 kzk8b?rOA jn4|gQ import java.io.*; "4IrW6B$9 import java.net.*; ^sKdN-{ (_%l[:o 6 s\zY^(v4 public class FileSplitterFetch extends Thread { 3,'LW} qRSoF04!R N~uc%wOA String sURL; //File URL S zNZY&8
f long nStartPos; //File Snippet Start Position Bs`mzA54 long nEndPos; //File Snippet End Position ?edf$-"z/ int nThreadID; //Thread's ID p*j>s\ boolean bDownOver = false; //Downing is over 0q4PhxR`e boolean bStop = false; //Stop identical 0q28Ulv9 FileAccessI fileAccessI = null; //File Access interface *sQ.y
{ GrUpATIx P{LS +. public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 2 g\O/oz { *knN?`(x this.sURL = sURL; CNe(]HIOH this.nStartPos = nStart; kQ]4Bo this.nEndPos = nEnd; |:.s6a# ( nThreadID = id; 2"T
b><^" fileAccessI = new FileAccessI(sName,nStartPos);//定位 YqmsL< } znB+RiV8 O>N/6Z IgjPy5k public void run() aGOS9 { R$!]z( while(nStartPos < nEndPos && !bStop) (*M0'5 { W__Y^\~ Ee_?aG
e& :t9sAD try{ qnHjw Mi URL url = new URL(sURL); _&(L{cFx6 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); =),O ;M httpConnection.setRequestProperty("User-Agent","NetFox"); VX*+: String sProperty = "bytes="+nStartPos+"-"; 8[.&ca/[ httpConnection.setRequestProperty("RANGE",sProperty); S}fQis Utility.log(sProperty); dU*$V7 \!hd|j?&6 ZbiC=uh InputStream input = httpConnection.getInputStream(); # >I_ //logResponseHead(httpConnection); Hs$HeAp; ZeY|JH1 rizjH+ byte[] b = new byte[1024]; C=CZtjUt int nRead; $}IG+,L while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) w_V A:]j4 { _xH<R nStartPos += fileAccessI.write(b,0,nRead); TQ:h[6v //if(nThreadID == 1) B uso
`G // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [MQ* =* } G)^/#d#& !vSq?!y6*P nGwon8&]] Utility.log("Thread " + nThreadID + " is over!"); #6
ni~d&0 bDownOver = true; *3P+K:2lNG //nPos = fileAccessI.write (b,0,nRead); }D+ b`, } -+u}u=z% catch(Exception e){e.printStackTrace ();} =>lX brJ } ;
wxmSX9 } |'&$VzA 5Ok3y|cEx x4PzP //打印回应的头信息 bI3GI:hp public void logResponseHead(HttpURLConnection con) i#^YQCy { d2NFdBoI for(int i=1;;i++) j/Y]3RSMp { WVsj String header=con.getHeaderFieldKey(i); =L@CZ" if(header!=null) %I9f_5BlT8 //responseHeaders.put(header,httpConnection.getHeaderField(header)); U}4I29M Utility.log(header+" : "+con.getHeaderField(header)); Kxa1F,dZ else YM#MfL# break; wfe4b } w N`Njm9! } FfxD=\ &SPY'GQ! pH.&C 5kA public void splitterStop() i-;#FT+Xc { mI{Fs|9h bStop = true; JWaWOk(t=? } '^C
*%"I]
Qe7=6< mR1b.$ } [3qH?2& (]\p'%A) TQKcPVlE /* wdf;LM **FileAccess.java 0>Td4qr+u *//文件访问(定位,写) N
P+vi@Ud package NetFox; {$Uj&/IC import java.io.*; F-b]>3r bcvm]aPu |c8\alw public class FileAccessI implements Serializable{ !;mn]wR>a iLJ@oM;2 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 yGNpx3H
RandomAccessFile oSavedFile; ^n<YO=|u long nPos; U^|T{g+O 3uxf n=E %FM26^ public FileAccessI() throws IOException h~]e~u V { S[q:b
. this("",0); 9d^m 7}2 } J=78p#XUg )+'=Zvgej= [<{r~YFjWW public FileAccessI(String sName,long nPos) throws IOException rm ;U'&{ { v4Rci^ 8 oSavedFile = new RandomAccessFile(sName,"rw"); 9B;WjXSe this.nPos = nPos; [zm@hxym oSavedFile.seek(nPos); ~]RfOpq^w } ;,6C&|n]w -0<vmU sbX7VfAR` public synchronized int write(byte[] b,int nStart,int nLen) C|Y[T{g?t { nA_'jl int n = -1; Zk lpnL*! try{ 0{%@"Fb0O oSavedFile.write(b,nStart,nLen); QW,:'\G n = nLen; ^^7@khmNl } mD.6cV catch(IOException e) {]8|\CcY? { (y6q}#< e.printStackTrace (); -`{W~yz } h!JyFc
%AtT(G(n L7aVj&xM return n; s@iY'11 } l1lYb;C Yq51+\d IO9|o!&> } :L+xEL Rc{R^5B a%U#PF6
/* 6,jCO@!
**SiteInfoBean.java (B$>o.(JA */ Y$"m*0 package NetFox; T(Q ~b dmXfz D wT- <#+L\ public class SiteInfoBean { =H23eOS_# J
;z`bk^ l3ogMRq@ private String sSiteURL; //Site's URL Kw;gQk~R! private String sFilePath; //Saved File's Path ^7? WR?! private String sFileName; //Saved File's Name _V1:'T8 private int nSplitter; //Count of Splited Downloading File GRYw_}Aa w{dRf!b69 M&hNkJK*G public SiteInfoBean() 'R'hRMD9o {//nSplitter的缺省值为5 d7G@Z|R3p //default value of nSplitter is 5 <`=Kt[_BQ this("","","",5); VVAc bAGJ } HBvyX`- .TdFI"Yn Ri`6X_xU public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) R= mTJ'y { ^o _J0
]m sSiteURL= sURL; ^78N25RU( sFilePath = sPath; ;Wy03}K4J sFileName = sName; a?nK|Q=e this.nSplitter = nSpiltter; YJHb\Cf. `Rfe*oAf 5NN;Fw+ } )4qspy3 fU
;H c CDT27@ public String getSSiteURL() |5dNJF8;Q { 6Y\TVRR return sSiteURL; W ).Kq- } Gv dok<o /D;ugc*3 :vEfJSA
1< public void setSSiteURL(String value) 1;<Vr<. { x+za6e_k" sSiteURL = value; 56c[$ q } 5vR])T/S0 z&9MkbH1 O.QR1 public String getSFilePath() `W@jo~y< { DjN1EP\Xx return sFilePath; M \k[?i } u&S0 G;vj3#u? y0T#Qq public void setSFilePath(String value) 65O 8?I { fUY05OMZ sFilePath = value; /%,aX[ } s:xJ }Ll Z8ivw\|M8 tKe-Dk9 public String getSFileName() 9)S3{i6w { zb4@U=?w} return sFileName; +2eri_p } 9Xa.%vw> . 70=xH Wp:vz']V public void setSFileName(String value) 11#b%dT { Ut'T!RD sFileName = value; ,:J[|9 } #&r}J d
oEuKT yFmy public int getNSplitter() o^(I+ <el { uK(]@H7~!c return nSplitter; n CX{tqy } eXnSH$uI $,/E"G` N3\RXXY public void setNSplitter(int nCount) 2p;I<C:Eo { O wu?ND nSplitter = nCount; VO {z)_ } oGI'a:iff } z^tzP~nI T*#M'H7LSQ 0nD?X+ u /* >\:GFD{z **Utility.java xq,ql@7 */ rA?<\* package NetFox; ]v>[r?X#V D bi ^% 7R79[:uwJ public class Utility { `'XN2-M8 v%2Dz j-**\.4a~ public Utility() 3ww\Z8UeK { 73'A Q")UJ e>c
-b^{& McS]aJfrk } ZD|F"v. H$WD7/?j //线程睡眠 0n2H7}Uq public static void sleep(int nSecond) Gukvd6-g9b { Srmr`[i try{ ' ,]Aj!q Thread.sleep(nSecond); L'KKU4zj } Qt>kythi catch(Exception e)
jwLZC { d(RMD e.printStackTrace (); f2o6GC_ } Y7qQ`| } lo6upirZX DQ/rx`BG //日志 x_<#28H! public static void log(String sMsg) C<9GdN { +p jB/#4 System.err.println(sMsg); PbS1`8|4 } *3={s"a.( v_U/0
0 &XI9%h9| public static void log(int sMsg) c1FSQ
m81 { \zk>cQ System.err.println(sMsg);
F{Yr8(UHA } 9-_Lc< } q&?hwX
Z7 VCnf`wZB" Zon7G6s9` /* <zTz/Hk` **TestMethod.java
=a=:+q g */ qj:[NPwaM package NetFox; keD?#yY z ULHgG PcZ<JJ16F$ public class TestMethod { |unvDXx- ,/V~T<FI pnx^a}|px public TestMethod() adri02C/ { ///xx/weblogic60b2_win.exe H<ovIMd try{ c'VCCXe SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); $>_`.*I/ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Uy|!f]"? SiteFileFetch fileFetch = new SiteFileFetch(bean); $'d,X@}8 fileFetch.start(); yk4py0xVl }
ac@\\2srV catch(Exception e){e.printStackTrace ();} )Kl@dj .L1[Rv3 KI*bW e } T1Z*>(M )
d'H&c3 daSx^/$R public static void main(String[] args) u^]Gc p { W]bytsl new TestMethod(); AEWrrE } Z]2z*XD } nB :i G 点击下载更多相关资料
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