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/* UHgW-N" **SiteFileFetch.java I~GHx5Dk */ -TMg9M4 package NetFox; 9m.MGJbQ_f import java.io.*; Wn{MY=5Y import java.net.*; v|MT^. |>RNIJ] Jot7
L%,TB public class SiteFileFetch extends Thread { 6p9 {z42 V.%LA.8 fK _uuw4 SiteInfoBean siteInfoBean = null; //文件信息Bean '#C5m#v long[] nStartPos; //开始位置 ce[
Maw long[] nEndPos; //结束位置 |xF!3GGms FileSplitterFetch[] fileSplitterFetch; //子线程对象 Gs\D`|3= long nFileLength; //文件长度 (tyky&$! boolean bFirst = true; //是否第一次取文件 GExr] 2r boolean bStop = false; //停止标志 kl1/( File tmpFile; //文件下载的临时信息 34QW^{dgE DataOutputStream output; //输出到文件的输出流 I7W`\d) g[*"LOw //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) R^mkQb>m. public SiteFileFetch(SiteInfoBean bean) throws IOException Ob{Tn@ { 3Vbt(K siteInfoBean = bean; ({zWyl //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); UxxX8N tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); j#U,zsv: if(tmpFile.exists ()) @+0dgkJ { Cmp5or6d bFirst = false; b!e0pFS; read_nPos(); LJ6l3)tpD } M0g=gmau else *+XiBho { -u7NBtgUh nStartPos = new long[bean.getNSplitter()]; qRR%aJ/ nEndPos = new long[bean.getNSplitter()]; dBwoAq`' } mMvAA; bU[_YuJbM d}%-vm} 0 ~MP |L?my } ;%Px~g NG`Y{QT6N =XtQ\$Pax public void run() ^ir)z@P?V { O c.fvP^ZD //获得文件长度 O._\l?m //分割文件 R58NTPm //实例FileSplitterFetch %ZcS"/gf //启动FileSplitterFetch线程 -k@1#c+z //等待子线程返回 W/3sJc9 try{ vvG"rU if(bFirst) ExQ\qp3 { +hKs nFileLength = getFileSize(); Y9gw
('\w if(nFileLength == -1) p/88mMr { 8rx|7 System.err.println("File Length is not known!"); N:CQ$7T{ j } j0j!oj)7I else if(nFileLength == -2) c%WO#}r| { xXc>YTK' System.err.println("File is not access!"); g*(z.
} LuHRB}W else ;aj;(Z.p) {
WzoI0E` for(int i=0;i<nStartPos.length;i++) pF7N = mO { <f`n[QD2z nStartPos = (long)(i*(nFileLength/nStartPos.length)); }#-@5["-X } `qYiic% for(int i=0;i<nEndPos.length-1;i++) $2,tT;50g { e&2,cQRFV nEndPos = nStartPos[i+1]; Te[v+jgLY, } E
.28G2& nEndPos[nEndPos.length-1] = nFileLength; [& Z-
*a } 1r};cY6 } @?3^Ks_ fm@Pa} , _5H~1G%q //启动子线程 (~%NRH<\ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 3tCTPZy for(int i=0;i<nStartPos.length;i++) tjwnFqI { D(;+my2 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), C
#iZAR siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 2Wu`Dp;&l nStartPos,nEndPos,i); [\#ANA" Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Vfga%K%l F fileSplitterFetch.start(); y631;dU } 934j5D // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +7o1&D*v siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); P3]K'*Dyd // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", t0jE\6r nEndPos = " + nFileLength); IG# wY // fileSplitterFetch[nPos.length-1].start(); s9a`2Wm h=,hYz?] %#rtNDi //等待子线程结束 7K
"1^ //int count = 0; Lui6;NY //是否结束while循环 {lH'T1^m boolean breakWhile = false; rAAx]nQ@ >Oj$Dn= ;l~a|KW0 while(!bStop) {hJCn*m_ { x s\<! write_nPos(); s+v9H10R Utility.sleep(500); /&Cq-W breakWhile = true; 1U#W=Fg' _B#x{ii jrFPd for(int i=0;i<nStartPos.length;i++) B1J,4 { yf0v,]v[ if(!fileSplitterFetch.bDownOver) pi~5}bF!a { as]M%|/-I breakWhile = false; #O!2 break; b@&uwS v } f|M^UHt8* } K}cA%Y if(breakWhile) g-wE(L break; ,*U-o}{8C? 717THci3Y Wz=&
0>Mm_ //count++; E"_{S.Wc //if(count>4) 1HKA`]D"p // siteStop(); 0?8>{!I } R[v0T/ 9#9bm 0RtZTCGO System.err.println("文件下载结束!"); )I3E } >;1w-n catch(Exception e){e.printStackTrace ();} pP1DR' } o-Dfud@ <uv`)Q 9 XVt;hO //获得文件长度 Y @'do) public long getFileSize() ]T'8O` { "i(f+N,) int nFileLength = -1; \t1#5 try{ 'DVn /3?X URL url = new URL(siteInfoBean.getSSiteURL()); MymsDdQ] HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nvf5a-C+q httpConnection.setRequestProperty("User-Agent","NetFox"); & ;.rPU lY"l6.c 5I2 h(Td int responseCode=httpConnection.getResponseCode(); '%t$mf!nV if(responseCode>=400) %;ED}X { HBR/" m processErrorCode(responseCode); gEsD7]o(= return -2; //-2 represent access is error
8|{ZcW } s=-?kcoJ2d ;Us6:}s Bo8f52| String sHeader; L`K)mCr 0.wF2!V. #*qV kPX for(int i=1;;i++) 6Aqv*<1=62 { -XL?n/M //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); SF*mY=1 //Utility.log(in.readLine()); KTT!P 4 sHeader=httpConnection.getHeaderFieldKey(i); YToG'#qs if(sHeader!=null) d*Su
c { 9&=%shOc+x if(sHeader.equals("Content-Length")) AZhI~QWo { {'A
15 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); yN{**?b break; jZqa+nG51 } *\xRNgEQ } ]~dB|WB else 9 c9$cnQ break; xj U0& } hz;SDaBA } `Zo5!"' catch(IOException e){e.printStackTrace ();} jrN 5l1np catch(Exception e){e.printStackTrace ();} *!y04'p`< c^1JSGv OfBWf6b Utility.log(nFileLength); *vRHF1)L .Qn#wub /];N 1 return nFileLength; u c!6?+0h } ,B/TqPP |tI{MztJ"c B&X)bGx8
//保存下载信息(文件指针位置)
~m=Z>4M private void write_nPos() I:=!,4S; { |>U<EtA" try{ ;:[P/eg output = new DataOutputStream(new FileOutputStream(tmpFile)); {`2 0' output.writeInt(nStartPos.length); U= n for(int i=0;i<nStartPos.length;i++) Q$.CtECo { 8M!9gvcaO // output.writeLong(nPos); $<Gt^3e output.writeLong(fileSplitterFetch.nStartPos); EB+4]MsD output.writeLong(fileSplitterFetch.nEndPos); u"v$[8 } "[["naa output.close(); '!Va9m*w7 } B
&Z0ZWx catch(IOException e){e.printStackTrace ();} n~`jUML2d catch(Exception e){e.printStackTrace ();} oSMIWwg7G } F'{ T[MA ZT&[:>upR Uhh[le2 % //读取保存的下载信息(文件指针位置) ;_<
Yzl private void read_nPos() 502(CO> { ,:}VbQ:3I try{ md{1Jn" DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); cqh1,h$sG int nCount = input.readInt(); =u9e5n nStartPos = new long[nCount]; U/q"F<?.c nEndPos = new long[nCount]; X%*BiI for(int i=0;i<nStartPos.length;i++) fvTp9T\f3 { ~rOvVi&4 nStartPos = input.readLong(); J^` pE^S nEndPos = input.readLong(); )06. dZq\ } C;ha2UV0H input.close(); .ejC#vB{KM } t9W* N\ catch(IOException e){e.printStackTrace ();} 2g)q
( catch(Exception e){e.printStackTrace ();} p,8:(|( } O>X!78]#K ?j!/Hc/b4 !JDyv\i} private void processErrorCode(int nErrorCode) I
%1P:- { :Oj!J&A System.err.println("Error Code : " + nErrorCode); Us&~d"n } vy5{Vm".4 @d3yqA
25xt*30M //停止文件下载 'zt}\ Dt public void siteStop() o~:({ { &{M-<M bStop = true; \3U.;}0_X for(int i=0;i<nStartPos.length;i++) 9ys[xOh
WM fileSplitterFetch.splitterStop(); >>-{AR0 `o+J/nc W}(xE?9& } sV~|9 /r } M _Lj5` //负责部分文件的抓取 S|RUc}( **FileSplitterFetch.java 2rP!] */ =snJ+yn! package NetFox; bb/A}<
zD G
@L`[Wu :NwFJc import java.io.*; P]4u`& import java.net.*; z*^vdi0 Y5IQhV. Y-DHW/Z~ public class FileSplitterFetch extends Thread { A sf]sU.. N':d
T c&L|e$C] String sURL; //File URL +{e2TY long nStartPos; //File Snippet Start Position G"<} s
mB long nEndPos; //File Snippet End Position ~|wh/]{b9 int nThreadID; //Thread's ID ` NvJ boolean bDownOver = false; //Downing is over ''EFh&F boolean bStop = false; //Stop identical UUgc> FileAccessI fileAccessI = null; //File Access interface ;2eZa|M*q PTA_erU bb`DyUy ^+ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException QN~9O^ { Z=s]@r this.sURL = sURL; #k)J);&ZA this.nStartPos = nStart; pvqbk2BO this.nEndPos = nEnd; 98l- nThreadID = id; g7LS fileAccessI = new FileAccessI(sName,nStartPos);//定位 7tT L,Nxe } .)=j~}\ [ 3SbWwg Kv\uBMJNW public void run() P<xCg { /(ArA=# while(nStartPos < nEndPos && !bStop) Mg^3Y'{o { 7}e{&\0=l
pe`&zI_`? u@[JX1&3"n try{ =G/`r!r*0I URL url = new URL(sURL); /{X2:g { HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); *3Ci4\Ew httpConnection.setRequestProperty("User-Agent","NetFox"); pB]+c%\ String sProperty = "bytes="+nStartPos+"-"; '%A*Z,f httpConnection.setRequestProperty("RANGE",sProperty); V)r6bb{^ Utility.log(sProperty); #>\8m+h 9 e#uF?v]O yYZ0o.<&T* InputStream input = httpConnection.getInputStream(); )VR/a //logResponseHead(httpConnection); IY9##&c3> 9"k^:}8. :.EVvuXI byte[] b = new byte[1024]; \>XkK<ye int nRead; Z0%Qy+% while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 7(= 09z { K~>ESMZ5 nStartPos += fileAccessI.write(b,0,nRead); 3/((7O[ //if(nThreadID == 1) < G:G/ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ob.=QQQs
} w!^{Q'/,Q -r"h[UV) iYxpIqWw Utility.log("Thread " + nThreadID + " is over!"); 5PCKBevV bDownOver = true; gkDlh{ //nPos = fileAccessI.write (b,0,nRead); _"%-=^_ } `~3y[j]kO catch(Exception e){e.printStackTrace ();} rwou[QU } sv?Lk4_ } js\|xfDxP /F6=iHK(l h/n&&J //打印回应的头信息 |d8x55dk public void logResponseHead(HttpURLConnection con) :s OsG&y { 9i+SU|;j for(int i=1;;i++) 2f$6}m'Ad { RBzBR)@5 String header=con.getHeaderFieldKey(i); U:
Q&sq8U if(header!=null) VlQaT7Q //responseHeaders.put(header,httpConnection.getHeaderField(header)); n~NOqvT < Utility.log(header+" : "+con.getHeaderField(header)); U#!f^@&AB else `[Xff24(eb break; A5> ,e| } VBK9te,A } ${F]N } /!Ng"^.e %7~~*_G public void splitterStop() H#;-(`F { 1tQl^>r16 bStop = true; <);Nc1 } $R[ggH& AR-&c 3o Xy(o0/7F9 } u`vOKajpH$ 7 a}qnk% Z>H
y+Q4 /* dLMKfh/4Q **FileAccess.java 2,X~a;+ *//文件访问(定位,写) eD481r package NetFox; L(2KC>GvA import java.io.*; %kJ_o*" pkL&j<{ g0D(:_QXp: public class FileAccessI implements Serializable{ ,!s;o6|*y \We\*7^E //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 8 3wa{m: RandomAccessFile oSavedFile; ]%PQ3MT. long nPos; (E*eq-8 4j'cXxo $*`=sV!r public FileAccessI() throws IOException BM&.Tw|x { @;we4G5 this("",0); Sp=6%3fZ]m } [l2ds: *3A[C-1~. ?p8(Uc#73 public FileAccessI(String sName,long nPos) throws IOException 67/&.d! { OA_Bz" oSavedFile = new RandomAccessFile(sName,"rw"); 5 :ZM-kZT this.nPos = nPos; ']hB_4v oSavedFile.seek(nPos);
Wb/q&o } Ty21-0F H7KcPN(0 BQcrF{q public synchronized int write(byte[] b,int nStart,int nLen) n%>c4*t { (gv1f int n = -1; A@X&dy try{ ^$7Lmd.qI oSavedFile.write(b,nStart,nLen); ~EVD NnHEr n = nLen; a;Q.R } q.l"Y#d
catch(IOException e) Fx.hti { +d0&(b e.printStackTrace (); \WnI&nu } J<<0U; <=
xmJx-V +|N!(H return n; ,[lS)`G } ix<sorR H 8()L }@y hDp
-,ag{ } JwNG`MGc K>2mm!{ Jbud_.h9 /* 8v},&rhPQq **SiteInfoBean.java rTiW */ 4|Dxyb>pS package NetFox; a3wTcp "r ^gwVh~j ]}_@!F) public class SiteInfoBean { J?WT Z^w}: { p#9.lFSX private String sSiteURL; //Site's URL w
a!g/\ private String sFilePath; //Saved File's Path `,mE
'3& private String sFileName; //Saved File's Name I-E}D"F;p[ private int nSplitter; //Count of Splited Downloading File "(6]K}k@ #-ioLt% /hPgOaB public SiteInfoBean() V=pg9KR!T {//nSplitter的缺省值为5 T>l=0a # //default value of nSplitter is 5 W2VH? -Gw this("","","",5); xr uQ=Q } tK3.HvD 4}FuoQL NJG-~w public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ]wg+zOJu]+ { E>tlY&0[$ sSiteURL= sURL; e~C^*w L sFilePath = sPath; 9Z,vpTE sFileName = sName; HL;y5o? this.nSplitter = nSpiltter; b]v.jgD qNP&f8fH
&D
"$N" } @'.(62v M^\#(0^2@ Iz/o|o]# public String getSSiteURL() 8}3dwr;- { c7mIwMhl~ return sSiteURL; n&Q{
[E } 3%?01$k %(GWR@mfC ?\dY! public void setSSiteURL(String value) ?lJm}0> { KLW#+vZ sSiteURL = value; G 3HmLz } :yN;_bC!b% \$Xo5f< o+sb2:x public String getSFilePath() fRp+-QvE { uXiAN#1 return sFilePath; <StyO[ } G992{B !/W[6'M#p *ip2|2G$ public void setSFilePath(String value) 8=rD'* { e_Na_l] sFilePath = value; EQDsbG0x } c"w}<8
bce>DLF $;1#gq% public String getSFileName() [:-Ltfr { pp$WM\r return sFileName; 5;wA7@ } !424K-nW ^nu~q+:+# \|\Dc0p} public void setSFileName(String value) " (c#H { hqW4.|&\c sFileName = value; VP
H } 8<UD#i@:C l+BJh1^ R}MdBE public int getNSplitter() \_pP:e { Tbl~6P return nSplitter; aqq7u5O1r } w=.w*?> ZUJ! t]|WRQvy8 public void setNSplitter(int nCount) |~b.rKQt[ { 1Wd?AyTY, nSplitter = nCount; USLG G}R } 6/`$Y!.ub } H79XP. TtE >U\,(VB :_;9&[H9ha /* +cQGX5 K **Utility.java iHoQNog-! */ hsIC5@s3 package NetFox; X~ n=U4s}O $]IX11.m 5)fEs.r0U public class Utility { <[O8{9j QXZjsa_| s`W\`w} public Utility() 7`;55Se { ~kUdHne( XXsN)2 *-~B{2b< } aIV(&7KT4 tZlz0BY! //线程睡眠 *RugVH4 public static void sleep(int nSecond) M)t d%<_ { T|o[! @:, try{ +b_g,RNs! Thread.sleep(nSecond); 7=yC*]BH-= } @/i;/$\ catch(Exception e) %N 8/g]`7 { Rg3 Lo ? e.printStackTrace (); o<@b]ukl& } #L[-WC]1y } 0PIiG-o9 f`w$KVZ1!w //日志 1"J\iwN3 public static void log(String sMsg) aa:Oh^AJy { `2 X~3im System.err.println(sMsg); c e`3& } Mf)0Y~_:R# 5MsE oLg K7 >Z)21 public static void log(int sMsg) +JoE[; { fx@Hd!nO~" System.err.println(sMsg); "L^Klk?Vn } Ipo?>To } V?U->0>Z4 "Sp+Q&2U | k"?I /* d&K2\n **TestMethod.java )SG+9!AbMZ */ @T53%v<5 package NetFox; b~?FV>gl m1DzUq; :A%|'HxH3 public class TestMethod { G0p|44_~t &9bsTm k2Yh?OH public TestMethod() k$`~,LJ p { ///xx/weblogic60b2_win.exe '51DdTU try{ hhjT{>je SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Dohq@+] O //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 8
1; QF_C SiteFileFetch fileFetch = new SiteFileFetch(bean); 8z&7wO fileFetch.start(); b e[KNrO } ~ _C[~- catch(Exception e){e.printStackTrace ();} S#+Dfa`8X O>e2MT|#k o.yuz+ } fY3^L"R EVc
Ees fD1J@57 public static void main(String[] args) mY9^W2: { t,$4J6 new TestMethod(); c>+l3&` } .nCF`5T! } 7\*_/[B 点击下载更多相关资料
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