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/* Qp kKVLi **SiteFileFetch.java 5q5 )uv" */ Q7~'![(a package NetFox; @<D'-mMt import java.io.*; tt6.
jo import java.net.*; UAsF0&] MAE7A"la {D_++^ public class SiteFileFetch extends Thread { 6R 1wn&8 ny12U;'s, (dzH3_U SiteInfoBean siteInfoBean = null; //文件信息Bean J3/\<=Qh long[] nStartPos; //开始位置 [x;(cISK1 long[] nEndPos; //结束位置 ydwK!j0y FileSplitterFetch[] fileSplitterFetch; //子线程对象 FOOQ'o[} long nFileLength; //文件长度 FX
HAZ2/\ boolean bFirst = true; //是否第一次取文件 (KT38RhA
boolean bStop = false; //停止标志 1MbY7!?PG File tmpFile; //文件下载的临时信息 <i\UMrD]`: DataOutputStream output; //输出到文件的输出流 ?^%YRB& k$e D(cW$ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) yz[%MXI public SiteFileFetch(SiteInfoBean bean) throws IOException ?,ZELpg n { = EQN-{# siteInfoBean = bean; ZYE' C //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); \%sPNw=e tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); `Y\gSUhzS if(tmpFile.exists ()) yGb a { F&=I7i bFirst = false; ; cGv] A+ read_nPos(); E2^ KK:4s } Uc_jQ4e_ else B#FHf
Z { 9#v-2QY nStartPos = new long[bean.getNSplitter()]; f ,tW_g nEndPos = new long[bean.getNSplitter()]; \hs/D+MCk } YV5Yx-+3w$ l6iw=b[? $ q%mu z-n>9 } R[x7QlA; {eEBrJJeB `wNm%*g public void run() CQ@LmTW[ { $Mdbto~ < //获得文件长度 LtC~)R //分割文件 U(U@!G) //实例FileSplitterFetch &Fw[YGJayz //启动FileSplitterFetch线程 `TUZZz //等待子线程返回 'S =sj}X try{ C">`' G2 if(bFirst) hHcJN { P+[QI
U nFileLength = getFileSize(); TqIAWbb& if(nFileLength == -1) "gFxfWIA { s(Z(e % System.err.println("File Length is not known!"); YTQ5sFuGM } a
"R7JjH else if(nFileLength == -2) %1Yz'AiW[ { oFWt(r System.err.println("File is not access!"); +`ai1-vw } ZAMeqPt else OkLz^R?d { 3)}(M for(int i=0;i<nStartPos.length;i++) W%TQYR { +wipfL~&S nStartPos = (long)(i*(nFileLength/nStartPos.length)); 538fK9[ } :*^:T_U for(int i=0;i<nEndPos.length-1;i++) Vzpt(_>< { 59.$ULQVMY nEndPos = nStartPos[i+1]; X4a^mw\" } }i(qt&U; nEndPos[nEndPos.length-1] = nFileLength; !{;[xXK4M } ! 0^;;' } fV 3r|Bp 3filAGR? z<hFK+j,'^ //启动子线程 Re>AsnA[ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; l09Fn>wa for(int i=0;i<nStartPos.length;i++) "u_i[[y { jAXR`D fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), cv2]* siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 2gt+l?O<PS nStartPos,nEndPos,i); ^EF'TO$ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); aR _NyA fileSplitterFetch.start(); qP7G[%=v } nTPB,QE< // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 2UiR~P]% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); GD!-
qH // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", {;*}WPYb nEndPos = " + nFileLength); ]bm=LA // fileSplitterFetch[nPos.length-1].start(); </= CZy5w 5y]io
Jc9- >-M ]:=L //等待子线程结束 #b'N}2'p#V //int count = 0; %,/lqc Fo //是否结束while循环 $_sYfU9 boolean breakWhile = false; jo}1u_OJ -ey)J
+?t TjxA#D) while(!bStop) [& ^RP,N~ { Ea-bC:> write_nPos(); 4jQ'+ 2it Utility.sleep(500); b^x07lO breakWhile = true; Y&K <{\vE @xS]!1- [F+,YV%t for(int i=0;i<nStartPos.length;i++) _-O cc=Z { &iqw!
ud if(!fileSplitterFetch.bDownOver) 3Hw[s0[$ { ;FU|7L$H breakWhile = false; }k7_'p&yk break; YGp)Oy}: } bHE7yv [ } nU2V]-qY if(breakWhile) b0rX QMu break; \:Za[6 =LI:S|[4 |f\D>Y%) //count++; eZH~je{1 //if(count>4) x0A7O // siteStop(); D^+?|Y@N } <*<U!J-i z}+i=cAN ]!Oue_-; System.err.println("文件下载结束!"); )u*^@Wo } GKZN}bOm\ catch(Exception e){e.printStackTrace ();} ?iv=53<c# } :HRT 2I y(5:}x&E dY!u)M;~~ //获得文件长度 x r[Vp public long getFileSize() s9O2k}] { CE ~@}` int nFileLength = -1; Z(e^ iH try{ ?qmp_2:WU URL url = new URL(siteInfoBean.getSSiteURL()); _'!kuE,*1 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); GS;%zdH~ httpConnection.setRequestProperty("User-Agent","NetFox"); e)@3m. j+kC-U; 7C7>y/uS int responseCode=httpConnection.getResponseCode(); 7O)" ` if(responseCode>=400) FOH@OY { \S ."?!U processErrorCode(responseCode); booRrTS return -2; //-2 represent access is error .TpsJXF } Xgat-cy'DA [/|zH'j: I[d]!YI}F String sHeader; <41ZZ0<EwY NmpnJu|8 =lp1Z> for(int i=1;;i++) eg<pa'Hw {
)h_8vO2 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); (dqCa[ //Utility.log(in.readLine()); =-#G8L%Q sHeader=httpConnection.getHeaderFieldKey(i); QR0(,e$Dl if(sHeader!=null) tU@zhGb { "35A/V if(sHeader.equals("Content-Length")) o6a0'vU>< { W\cjdd nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); }^%xvmQ\] break; taWqSq! } I:l01W; } +v7) 1y else [
MyE2^ break; UzG[:ic% } Z7a945Jd } ldqLM catch(IOException e){e.printStackTrace ();} FwG!> catch(Exception e){e.printStackTrace ();} <RXw M6G2 pQa:pX ' cIEc1y Utility.log(nFileLength); /7"I#U^u/ [k<1`z3 {tiKH=&J return nFileLength; [}z,J"Un } ZZxk]D< :"1|AJo) ]a'99^?\ //保存下载信息(文件指针位置) zjl!9M! private void write_nPos() h6:#!Rg { wT,R0~V0 try{ cU.9}-) output = new DataOutputStream(new FileOutputStream(tmpFile)); pUYM}&dX output.writeInt(nStartPos.length); (?0`d for(int i=0;i<nStartPos.length;i++) bHE2,;o { <vV_%uoM // output.writeLong(nPos); aYn^)6^ output.writeLong(fileSplitterFetch.nStartPos); K > g[k_ output.writeLong(fileSplitterFetch.nEndPos); }G
VX>p } JRaq!/[( output.close(); YHXLv#8 } g}LAks catch(IOException e){e.printStackTrace ();} 0#_'o , catch(Exception e){e.printStackTrace ();} i3$$,W! } fyknP)21I Lgk dT|vYK}\ //读取保存的下载信息(文件指针位置) XvTCK>1 private void read_nPos() hX:"QXx { \ 0W!4D
try{ zUJZ`seF DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); <y.]ImO int nCount = input.readInt(); p>w]rE:} nStartPos = new long[nCount]; b97w^ah4gJ nEndPos = new long[nCount]; ULJ mSe for(int i=0;i<nStartPos.length;i++) o 5U(i { AIYmS#V1W2 nStartPos = input.readLong(); $sHP\{ nEndPos = input.readLong(); !]yO^Ob.E } KngTc(^_D input.close(); 942lSyix } =q7Z qP catch(IOException e){e.printStackTrace ();} FS6`6M.K catch(Exception e){e.printStackTrace ();} as yZe } {i0SS
]:M0Kj&h :rMM4 private void processErrorCode(int nErrorCode) I#F!N6; { w8S!%abl1 System.err.println("Error Code : " + nErrorCode); k <iTjI*N } DyJ.BQdk) EOj"V'! <EO$]>;0 //停止文件下载 dO> VwP public void siteStop() q[q?hQ/b { B%CTOi bStop = true; }je,")#W for(int i=0;i<nStartPos.length;i++) S-Y=-" fileSplitterFetch.splitterStop(); f5AjJYq1 \wcam`f {%lXY Myu } 'rp }G&m } bV+(b9 //负责部分文件的抓取 >@xrs **FileSplitterFetch.java &Mq~T_S */ @hQlrq5c package NetFox; Q/uwQo/ g- AHdYJ [qUN 4x5b import java.io.*; c#-U%qZ import java.net.*; M>9-=$7 fZ04!R I-y#Ks1p+ public class FileSplitterFetch extends Thread { KqBk~-G #} ~qqJ G2 -}O1dEn. String sURL; //File URL vE@!{* long nStartPos; //File Snippet Start Position ~(!XY/0e long nEndPos; //File Snippet End Position f`9
b*wV int nThreadID; //Thread's ID 0sN.H= boolean bDownOver = false; //Downing is over N{
Z
H boolean bStop = false; //Stop identical An;MVA FileAccessI fileAccessI = null; //File Access interface 5pr"d@. +/,icA}PI @SZM82qU2z public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException {^(ACS9mL { ?0?
R this.sURL = sURL; Q_* "SRz this.nStartPos = nStart; S5~VD?O, this.nEndPos = nEnd; - p3Re9 nThreadID = id; Bjk]ZU0T fileAccessI = new FileAccessI(sName,nStartPos);//定位 A+6 n# } \drqG&wl (py]LBZ w0w G-R ? public void run() G'3qzBJ# { G9g1hie@% while(nStartPos < nEndPos && !bStop) O"Ku1t! { il|1a8M2~ *
#jsgj[ |
N0Z-| try{ q0f3=" URL url = new URL(sURL); ^O^l(e!3 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); lY|Jr{+Ln httpConnection.setRequestProperty("User-Agent","NetFox"); dJT]/g String sProperty = "bytes="+nStartPos+"-"; %K(<$! httpConnection.setRequestProperty("RANGE",sProperty); pw7[y^[Qg Utility.log(sProperty); @u==x*{| fP.F`V_Y WVVJ InputStream input = httpConnection.getInputStream(); f|O{#AC //logResponseHead(httpConnection); o-}R?> :ba5iMa O@p]KSfk byte[] b = new byte[1024]; 311LC cRp int nRead; :Ad&$eg+ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) t#q<n:WeYU { pZ/>[TP(%F nStartPos += fileAccessI.write(b,0,nRead); ': N51kC //if(nThreadID == 1) /~ x"wo // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); EEGy!bff } ZPbpp@, nstUMr6 yAoe51h? Utility.log("Thread " + nThreadID + " is over!"); B6wRg8 bDownOver = true; | WvU q //nPos = fileAccessI.write (b,0,nRead); w)Covz'uf } @V03a
)6,h catch(Exception e){e.printStackTrace ();} dtp oU&?6s } XC.%za8 } @|Rrf*J?% ^ f# FI& os/vtyP:a //打印回应的头信息 [IK ) public void logResponseHead(HttpURLConnection con) R: l&2k@ { V}\~ugN)y for(int i=1;;i++) bV ZMW/w { zN
[2YJ$ String header=con.getHeaderFieldKey(i); eImn+_ N3 if(header!=null) X7s
`U5'l //responseHeaders.put(header,httpConnection.getHeaderField(header)); (V4
~`i4V Utility.log(header+" : "+con.getHeaderField(header)); 6R=W}q4 else Q+YRf3$ break; OE}*2P/M> } dd]/.Z } lsJnI| !?|Th5e ANgw"&&>( public void splitterStop() 9<KAXr# { 1Tu
*79A bStop = true; O%FPS= } S#+h$UVh Th=eNL] lV%N } L'u\w @|\}.M<e*) =jN*P? /* }Hn/I,/ **FileAccess.java O }
f80K *//文件访问(定位,写) ?Wz8[u package NetFox; e o pD5 import java.io.*; TYy.jFT- V{JAB]?^ j$+nKc$ public class FileAccessI implements Serializable{ TA{\PKA) ]Ux<aiY]a
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 5H ue7'LS RandomAccessFile oSavedFile; 8 XU1/i7N long nPos; 1Z9qjV%^ 3+XOZh8 3`k;a1Z#O' public FileAccessI() throws IOException Zl*X?5u { KQ~i<1&j this("",0); rb|U;)C } [i]Ub0Dh7 %"P,1&\^ Dc_yM public FileAccessI(String sName,long nPos) throws IOException kXf'5p1 { 1PpyV f oSavedFile = new RandomAccessFile(sName,"rw"); qzTuxo0B this.nPos = nPos; 9]@A]p! oSavedFile.seek(nPos); d+'p@!W_ } bFW =ylF9 @7B$Yy# DCZ\6WY1G) public synchronized int write(byte[] b,int nStart,int nLen) +(h\fm7*- { ?Orxmxc
2 int n = -1; t2lS
~l) try{ QDu 2?EYZq oSavedFile.write(b,nStart,nLen); o#skR4lwe n = nLen; U-|NY } uXKERzg catch(IOException e) Ry'= ke { jrS[f e.printStackTrace (); 1&-
</G# } {DR`;ea])1 [<6S%s $g
sxO!G return n; B#M5}QT|2 } Rp5#clsy |]c8jG\h DK$s&zf } Qc pm! R;j!}D!4 :AE&Ny4 /* <>8WQn,K **SiteInfoBean.java ` eXaT8 */ 'nwx9]q package NetFox; & 9<+;*/ w'm;82V:P- &sU?Ok6 public class SiteInfoBean { w'UVKpG+ TTKs3iTXz PF53mUs4 private String sSiteURL; //Site's URL FAj)OTI2S private String sFilePath; //Saved File's Path +1D+]*t_?[ private String sFileName; //Saved File's Name 'L8'
'(eZ^ private int nSplitter; //Count of Splited Downloading File R.yC(r i(NdGL#P fP.
6HF_p_ public SiteInfoBean() sNLs\4v {//nSplitter的缺省值为5 aXoVy&x= //default value of nSplitter is 5 (,8$V\ this("","","",5); H(Z88.OM } MerFZd 1 @WVcY:1t# /@,j232 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 6=fSE=]DY { 0`[wpZ sSiteURL= sURL; P9vA7[ sFilePath = sPath; {62n7'U{ sFileName = sName; d&+h}O this.nSplitter = nSpiltter; cj1cZ- ekWePL;rR2 FN8NTBk } CL+}|7O( #N`~xZ|$ <kx&w(= public String getSSiteURL() L{8xlx` { !y@6Mm return sSiteURL; CW,Wx: Y } DKBSFm{~Q %y@Hh= p{j.KI s7 public void setSSiteURL(String value) <psZQdH { .n~M(59 sSiteURL = value; AD|2qM)) } ~x]jB Yo|,]X>/ <c2'0I > public String getSFilePath() ~,i-8jl, { `pGa~!vl return sFilePath; lx[oaCr } OUhqMVX9C Kq;8=xP[ z}MP)|aH: public void setSFilePath(String value) /,g ,Ch<d { 'coV^~qy sFilePath = value; pLLGus+W } t},/}b %>g3~yl j4cwI90= public String getSFileName() 2(#7[mgPI { 0sfr d return sFileName; Yi$vg } 61)-cVC *q-['"f U
G~b a public void setSFileName(String value) +,#$:fs u { TzNn^ir=HX sFileName = value; /assq+H } {/
BT9|LI qLB)XnQ Ht&:-F+dm public int getNSplitter() AMyIAZnYq) { B>0].CK` return nSplitter; V{:A3C41 } USM4r!x xUa{1!Y8 YLiSbLz1 public void setNSplitter(int nCount) M!REygyx { IVAmV!.z nSplitter = nCount; =AEBeiz } pQtJc*[! } 'a\%L:` G}ob<`o|" >8qQK r\" /* paD !Z0v& **Utility.java 7r~~Y%=C| */ B4i!/@0s package NetFox; g.zEn/SM 3%%o?8ES fR*q?, public class Utility { f
(F)1 U qFv}VsnF "saUai4z public Utility() 6{^E{go { Is{KN!Hw ,Q
HU_jt u (em&M } 9mmCp&~Z ucG@?@JENm //线程睡眠 b"#WxgaF public static void sleep(int nSecond) Y}#J4i0b* { QT>`^/]d try{ U8LtG/ Thread.sleep(nSecond); 2gCX}4^3b } er!DYv catch(Exception e) -\
EP.Vtz { DUC#NZgw e.printStackTrace (); !>zo_fP } o1h={ao } .U?'i< L>SjllY //日志 +ayos[<0# public static void log(String sMsg) j]aoR { :uK?4 System.err.println(sMsg); /Q2mMSK1h } 4:dH] +gJ8{u!=k o!{w"K public static void log(int sMsg) Q2F+?w;, { o'f?YZ$. System.err.println(sMsg); t ]_VG } Pyb Z)5u } LRb{hUt= A<qTg`gA xK6n0] A /* I~Zh@d% **TestMethod.java n=c
2Kc */ &'
Ne!o8 package NetFox; 9&_<f}ou (<}&DE bdF.qO9
public class TestMethod { t 0|!(3 )`A3M) Vc2A public TestMethod() [ji#U s:h { ///xx/weblogic60b2_win.exe o8-^cP1 try{ sU@nc!&Y@ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); .QN>z-YA6: //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); \0vr>C SiteFileFetch fileFetch = new SiteFileFetch(bean); ] 0B2#
d fileFetch.start(); jkt_5+S } 2L} SJUk* catch(Exception e){e.printStackTrace ();} g#t[LI9(F[ !VI]oRgP DIzH`|Y } b+&%1C |qmu_x\ gm[z[~X@ public static void main(String[] args) {yB&xj[z { Y[K*57fs new TestMethod(); 8=Z9T<K } "vyNxZE } 3T!lA 点击下载更多相关资料
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