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/* <"o"z2 **SiteFileFetch.java %iJ%{{f` */ 0=w K:Ex package NetFox; ]0D}T'wM import java.io.*; X5YiFLH>y\ import java.net.*; ThW,Y"
l @1zQce> *zO&N^X.4 public class SiteFileFetch extends Thread { cYNJhGY R E1/"[t 9iN.3/T8 SiteInfoBean siteInfoBean = null; //文件信息Bean m?s}QGSka long[] nStartPos; //开始位置 # N~,F@t long[] nEndPos; //结束位置 sqx`">R FileSplitterFetch[] fileSplitterFetch; //子线程对象 F#xa`*AP long nFileLength; //文件长度 dQezd-y* boolean bFirst = true; //是否第一次取文件 Y}6n]n;uR boolean bStop = false; //停止标志 DN4#H` File tmpFile; //文件下载的临时信息 %}2@rLP DataOutputStream output; //输出到文件的输出流 J H.K.C( EoX_KG{ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) dQy>Nmfy public SiteFileFetch(SiteInfoBean bean) throws IOException W{XkVKe1a { +@X5!S6 siteInfoBean = bean; Z,N$A7SBE //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 7iuQ9q^& tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); - ~O'vLG if(tmpFile.exists ()) Q5S,{ ZeT { 6VD1cb\lF bFirst = false; ryO$6L read_nPos(); Ql?^
B
SqG } y0v]N else "s
W-_j] { 8GJdRL( nStartPos = new long[bean.getNSplitter()]; .AV)'j#6P nEndPos = new long[bean.getNSplitter()]; 3*DXE9gA9 } ^GN8V-X4y cIXwiC8t *X%m@KLIKv P+e KZo } 31Cq22" {5c]Mn"r SEKN|YQV/t public void run() "rXOsX\; { ;??ohA"{5 //获得文件长度 ps1YQ3Ep& //分割文件 ;D ~L| //实例FileSplitterFetch ,xJrXPW //启动FileSplitterFetch线程 rl:KJ\*D //等待子线程返回 g1DmV,W-Q try{ T+"f]v if(bFirst) $awi>#[ { 1;u4X`8 nFileLength = getFileSize(); 8U~.\`H-PT if(nFileLength == -1) yI:#
|w| { Q/_[--0 System.err.println("File Length is not known!"); ]^"k8v/ } pw>m.=9|y else if(nFileLength == -2) >L((2wfiN { cu#e38M&eE System.err.println("File is not access!"); KB{RU'?f| } j'Y/ H5 else
Ex@`O+ { )tZ`K
| for(int i=0;i<nStartPos.length;i++) 3bC
yTZk { <*'cf2Q$Av nStartPos = (long)(i*(nFileLength/nStartPos.length)); @%tXFizh } [nN7qG for(int i=0;i<nEndPos.length-1;i++) PW}OU9is { fF?6j nEndPos = nStartPos[i+1]; + R$?2 } #?}6t~ nEndPos[nEndPos.length-1] = nFileLength; ed~R>F> } &ju- } .I?@o8'x c $;\i upn8n vy4( //启动子线程 8?TKN~ja fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; lpQP"%q for(int i=0;i<nStartPos.length;i++) l_FGZ!7 { a,'Cyv"> fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), \Z5+$Ij siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), )&NAs nStartPos,nEndPos,i); NlR"$ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :x>T}C<Y fileSplitterFetch.start(); #Olg(:\ } e]W0xC- // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ?z` MPdO siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); :jNYP{Br // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 4yV].2#rl" nEndPos = " + nFileLength); ;cP8 ?U // fileSplitterFetch[nPos.length-1].start(); C;1PsSE+A u,i]a#K 4~?2wvz G4 //等待子线程结束 #JNy //int count = 0; gzfb zt}? //是否结束while循环 -R+zeu(e' boolean breakWhile = false; ;'kI/(;;C T@+ClZi (*^DN{5 while(!bStop) +!>LY { dBEIMn@ write_nPos(); MB$a82bY Utility.sleep(500); '%4P;HO breakWhile = true; ?#[)C=p]z c;!g W04av_u 5 for(int i=0;i<nStartPos.length;i++) P;foK)AM { 4!%]fg}Um if(!fileSplitterFetch.bDownOver) NXoK@Y { 744=3v breakWhile = false; =:$) Z break; w$Ux?y-L } to3?$-L } 1 tfYsg=O if(breakWhile) Ygj6(2 break; #a}N"*P s"mFt{Y H:}}t]E //count++; lJ/6-dP //if(count>4) ~Yk"Hos // siteStop(); +mWjBY } }5S2p@W) Dt}dp_ ??xlA-E System.err.println("文件下载结束!"); ?vbDB 4 } 0<P(M: a catch(Exception e){e.printStackTrace ();} g{ (@uzqG } Bhuw(KeB 8]*Q79 =y;@?=T //获得文件长度
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public long getFileSize() CyTFb$Z { lSCY5[? int nFileLength = -1; Z] { @H try{ jb@\i@- URL url = new URL(siteInfoBean.getSSiteURL()); {g=b]yg\o HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,?=KgG1i httpConnection.setRequestProperty("User-Agent","NetFox"); z-Hkz (&Q)EBdm H1UL.g%d= int responseCode=httpConnection.getResponseCode(); HWtPLlNt if(responseCode>=400) !LSs9_w { K`+vfqX processErrorCode(responseCode); ?[SVqj2- return -2; //-2 represent access is error &l^n4 } BR3mAF wixD\t59X mTd<2Hy String sHeader; #eEvF YRa4W.&Yn [t}):}~F| for(int i=1;;i++) D0M!"c>\ { GVp //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); &q>h*w4O //Utility.log(in.readLine()); q!*MH/R sHeader=httpConnection.getHeaderFieldKey(i); c,BAa*]K if(sHeader!=null) '5WN,Vy8. { i+U51t< if(sHeader.equals("Content-Length")) z\$;' { |0w~P
s nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 59MR|Jt break; cju@W] ! } \]a uSO } PJwEA else 3;D?|E]1 break; a(Sv,@/ } }9}w8R~E } N[ Q#R~Hn< catch(IOException e){e.printStackTrace ();} f(.6|mPp catch(Exception e){e.printStackTrace ();} sN@j5p^jc z|%Bh o}!&y?mp Utility.log(nFileLength); e[p^p!a g^n;IE$B ORtg>az\% return nFileLength; Zjt9vS) } ;qG1r@o V<W02\Hs [J:zE&aj //保存下载信息(文件指针位置) P=pY8X: private void write_nPos() !G>(j { C zpsqTQ try{ 5:_~mlfi output = new DataOutputStream(new FileOutputStream(tmpFile)); bXm:]? output.writeInt(nStartPos.length); hLn&5jYHvt for(int i=0;i<nStartPos.length;i++) #mTMt;x { o3= .T+B // output.writeLong(nPos); '}fel5YV output.writeLong(fileSplitterFetch.nStartPos); JOgmF_(>Z output.writeLong(fileSplitterFetch.nEndPos); f-s~Q4 } -_w~JCx output.close(); p}r yKW\cJ } :7k`R62{ catch(IOException e){e.printStackTrace ();} 1J+3a-0 catch(Exception e){e.printStackTrace ();} :%>oe> _" } KMe.i' , Z4p0M Nq
U9/ //读取保存的下载信息(文件指针位置) 6BHPzv+Y private void read_nPos() S#hu2\9D, { gm}C\q9 try{ SE-} XI\ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); %N1T{ int nCount = input.readInt(); _32/WQF6 nStartPos = new long[nCount]; LNbx3W
oC nEndPos = new long[nCount]; jiOf')d5 for(int i=0;i<nStartPos.length;i++) y,1S&k { <JJkki nStartPos = input.readLong(); h
bdEw=r? nEndPos = input.readLong(); z.{HD9TD } iPNd!_ input.close(); @u<0_r
t } l#|J
rU! catch(IOException e){e.printStackTrace ();} 'H
FwP\HX catch(Exception e){e.printStackTrace ();} (T4k~T`3 } UT% #K % UzN8G$92qF B\NcCp`5 private void processErrorCode(int nErrorCode) DZF[dxH { @eA %(C System.err.println("Error Code : " + nErrorCode); mnQal>0~ } )m)h/_ JJ)y2 K"G(?<>~4c //停止文件下载 f};!m=b public void siteStop() ./2Z?, { ]+FX$+H/A0 bStop = true; 1.uUMW
for(int i=0;i<nStartPos.length;i++) KgL<}=S fileSplitterFetch.splitterStop(); EOofa6f&l +6wx58.B& T R+Q4Y: } SG1&a:c+. } es{cn=\s //负责部分文件的抓取 z`;&bg\8 **FileSplitterFetch.java S/KVN(Z */ )|MIWgfWN package NetFox; ;}n|,g> j#4+- ,K`E&hS import java.io.*; <tGI]@Nwk import java.net.*; ,,zd.9n (cu' _95- -\ public class FileSplitterFetch extends Thread { ;sm"\.jF q.U*X5 !4i,%Z&6 String sURL; //File URL i#Ne'q;T long nStartPos; //File Snippet Start Position G%y>:$rw[O long nEndPos; //File Snippet End Position {/th`#o4b int nThreadID; //Thread's ID (X0`1s boolean bDownOver = false; //Downing is over Ax :3} boolean bStop = false; //Stop identical 4o)(d=q FileAccessI fileAccessI = null; //File Access interface <=#lRZW[z )R8%wk?2 Ompi~ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException "m
wl-= { (9Fabo\SH this.sURL = sURL; F]/L! this.nStartPos = nStart; .G7]&5s this.nEndPos = nEnd; &?}kL=
h nThreadID = id; )w^GPlh fileAccessI = new FileAccessI(sName,nStartPos);//定位 NKupOJJq } ~% D^Ga7 jdV .{8@ pE$|2v public void run() ~R"]LbeY { :|*Gnu while(nStartPos < nEndPos && !bStop) /8 e2dw:
\ { f)p>nW?Z Aqx3!
C.b,]7i try{ Tb5$ URL url = new URL(sURL); x&Q+|b% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); OL,/-;z6 httpConnection.setRequestProperty("User-Agent","NetFox"); !C9ps]6 String sProperty = "bytes="+nStartPos+"-"; $]Q*E4(kV9 httpConnection.setRequestProperty("RANGE",sProperty); ^.ZSpc}< Utility.log(sProperty); JUe K"|fA :w?:WH?2L vLi/ '|7 InputStream input = httpConnection.getInputStream(); ZX~>uf\n //logResponseHead(httpConnection); >X-ed sBeP;ox )nf=eU4| byte[] b = new byte[1024]; [
t>}SE int nRead; oi33{#%t while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^&f{beU9 { Nb|3?c_ nStartPos += fileAccessI.write(b,0,nRead); =DeHxPv}f //if(nThreadID == 1) +0oyt? // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); R=#q"9qz } -6hu31W z'vdC Tx|SAa=V Utility.log("Thread " + nThreadID + " is over!"); s$SU
vo1J bDownOver = true; XvfcPI6 //nPos = fileAccessI.write (b,0,nRead); q\\8b{~ } tEpIyC catch(Exception e){e.printStackTrace ();} N'lGA;}i } N (:E K } XwHu:v'= WI*^+E&=* c%xED%X9 //打印回应的头信息 F]URf&U public void logResponseHead(HttpURLConnection con) t z
+ { pXpLL_ for(int i=1;;i++) JxMyeo%gv { -z>Z0viA String header=con.getHeaderFieldKey(i); 5WtQwN~ if(header!=null) (R;)
9I\ //responseHeaders.put(header,httpConnection.getHeaderField(header)); {UV<=R,E Utility.log(header+" : "+con.getHeaderField(header)); Li c{'w& else CYTuj>Ww break; Ti9:'I
} Y:tW] } Allt]P> MHpL$g=5_ EyKkjEXx_ public void splitterStop() *<|~=*Ddf { ^cKv JSY bStop = true; rC1qGzg\a } !R] CmK m<,y-bQ*( z1{E:~f } a6#{2q p ?Ij-uo"o WcZo+r /* *tbpFk4/ **FileAccess.java x 1%J1?Fp *//文件访问(定位,写) >tXufzW package NetFox; &dwI8@& import java.io.*; ~q'w),bE"Q t9$AvE#a!= *1ID`o public class FileAccessI implements Serializable{ Ul7pxzj @>
+^< //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 pZ@W6} RandomAccessFile oSavedFile; /`j K long nPos; eK=m0 2 W=;(t YN5OuKMUd' public FileAccessI() throws IOException )LMBxyS { f/IRO33 this("",0); =@ L5 } 'EH Gg3?2h"d 0?&aV_:;X public FileAccessI(String sName,long nPos) throws IOException a\[fC=]r: { mNBpb} oSavedFile = new RandomAccessFile(sName,"rw"); p)[BB6E this.nPos = nPos; "$,}|T?Y` oSavedFile.seek(nPos); NBbY## w0 } @tjZvRtZ 2os6c te )z*$`?)k public synchronized int write(byte[] b,int nStart,int nLen) 7Y @=x# { 9rf|r
3 int n = -1; )@lo ';\ try{ $S)e"Po~5 oSavedFile.write(b,nStart,nLen); qhn&;{{ n = nLen; kw-Kx4 ) } ]~ g|SqPA@ catch(IOException e) =aCIaL&9Y { 00.iMmJ e.printStackTrace (); YiI:uG!|D } v&CO#vK5. b3 %& ,mE]?XyO return n; G(Idiw#WT } pRk'GR]` r/s&ee |V~(mS747: } 7,&]1+n Lct+cKKU 6_`eTL=G /* qS/71Kv' **SiteInfoBean.java ?+} E */ GD6'R"tJ package NetFox; <g|nmu)o$ w4<u@L qdkTg: QJ, public class SiteInfoBean { M;Mdz[Q ETH#IM8J sJYKt private String sSiteURL; //Site's URL 0or6_y6 private String sFilePath; //Saved File's Path h?pGw1Q private String sFileName; //Saved File's Name 1WA""yb private int nSplitter; //Count of Splited Downloading File )>#<S0>'j RAx]Sp
Q-S r^o}Y public SiteInfoBean() \Dsl7s= {//nSplitter的缺省值为5 as!|8JE` //default value of nSplitter is 5 I`n1M+=% this("","","",5); +IOKE\,Y } `v/tf|v6 eQ)ioY [9W&1zY public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) "*>QxA%c4 { k9VQ6A sSiteURL= sURL; 0wE8GmG sFilePath = sPath; cdU
>iB, sFileName = sName; N(({2'Rr this.nSplitter = nSpiltter; r{:la56Xd 0\ytBxL )*L?PT } cX=b q_ Dil4ut-$ dU04/]modD public String getSSiteURL() [ Xo
J7 { gu.))3D9 return sSiteURL; &MGgO\|6 } Z`1o#yZ }-]s#^'w ;uo|4?E:\( public void setSSiteURL(String value) WZO
0u { +P6 sSiteURL = value; m5Laq'~0_ } ,vY
I
O u #QSa$P [?r\b public String getSFilePath() 1MzB?[gx { eEds-&_ return sFilePath; WE8L?55_Au } Z(`K6`KM &)'kX '`A67bdq) public void setSFilePath(String value) K/LaA4 { Fb4S/_
V sFilePath = value; -){^
Q:u } oIR%{`3"I PT*@#:MA +z/73s0~ public String getSFileName() [(^''*7r+T { $/(/v?3][e return sFileName; E6IL,Iq9 } *q9$SDm
kd2'-9 @P*P8v8: public void setSFileName(String value) D
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R { R8Ei:f} sFileName = value; Ita!07 } HQ#L
|LN ha'm`LiX
7^}Z%c public int getNSplitter() |P?B AWYeQ { -`<N, return nSplitter; X/D9%[{& } HE.Dl7{ Qz90 mb
!{=%l+^. public void setNSplitter(int nCount) k`zK { L1w4WFWO nSplitter = nCount; o\YdL2:X } KE1@z] } ]tV{#iIJ* j3'/jk]\ T//+&Sk[ /* j
W]c9u **Utility.java G!lykk] */ )uJ`E8>- package NetFox; WQ`P^5e 20xGj?M hzVr3;3Zn
public class Utility { VTkT4C@I;Y 9jFDBy+ |"&4"nwa public Utility() Olrw>YbW { N@
tb^M r,@|Snv) t#Yh!L6> } {.'g!{SHp !f[N&se //线程睡眠 3JO:n6 public static void sleep(int nSecond) \DdVMn { ?4dd|n try{ d`*vJ#$>2 Thread.sleep(nSecond); ApB'O;5 } ^HKaNk< catch(Exception e) _'v )Fy { V^H47O;VC e.printStackTrace (); 9GOyVKUv } 3Jit2W4 } Xq$0% WjG c=mFYsSv //日志 4h@of' public static void log(String sMsg) g5]DA.&( { *\5H\s9< System.err.println(sMsg); R5~m"bE } 1KEPD@0oxx [_GR'x'0x n m$G4Q public static void log(int sMsg) 6/C { J)~=b_'< System.err.println(sMsg); g4932_tC } D'=`O6pK } JIkmtZv (bXp1*0 ; wn.0U /* F=lj$?4{ **TestMethod.java jtJU5Q */ Msdwv.jM package NetFox;
DGUU1vA !S<~(Ujyw U4/$4.'NQ public class TestMethod { `OK
}q p`ZGV97 p#I1l2nE public TestMethod() X> KsbOZ { ///xx/weblogic60b2_win.exe cE#Y,-f try{ ucO]&'hu: SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Kqjeqr@) //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); b?^<';,5 SiteFileFetch fileFetch = new SiteFileFetch(bean); "@Fxfd+Ot fileFetch.start(); vdM\scO: } uSbg*OA catch(Exception e){e.printStackTrace ();} }gt~{9?c ,4UJ|D=J @T T[H*, } jV8><5C iSax-Mc b(,[g>xH public static void main(String[] args) a_x6 v* { 9dv~WtH>5 new TestMethod(); 247>+:7z } mI18A#[ 3 } L*38T\ 点击下载更多相关资料
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