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/* t#6@~49 **SiteFileFetch.java oefhJM!y */ jO#5ZhG package NetFox; 8yV?l7 import java.io.*; ohe0}~)V import java.net.*; Y-Gqx juQQ }_L,Xg:I public class SiteFileFetch extends Thread { E)w^odwMU INj2B@_ 9My
|G)M6 SiteInfoBean siteInfoBean = null; //文件信息Bean `-L{J0xq long[] nStartPos; //开始位置 VCZ.{MD long[] nEndPos; //结束位置 0WI3m2i FileSplitterFetch[] fileSplitterFetch; //子线程对象 RZV6\j long nFileLength; //文件长度 {\+!@? boolean bFirst = true; //是否第一次取文件 R3SAt-IE boolean bStop = false; //停止标志 8Yq_6 File tmpFile; //文件下载的临时信息 o3~ecJ?k DataOutputStream output; //输出到文件的输出流 O_jf)N\pi Lx:O Dd //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 4 u!)QG public SiteFileFetch(SiteInfoBean bean) throws IOException c~a:i=y67 { !yQ# E2/A siteInfoBean = bean; A\7qPfpG //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); LD~/* tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Eh&et0&=g if(tmpFile.exists ()) jKI0d+U { B2PjS1z2 bFirst = false; t
Tky read_nPos(); ErNL^Se1 } |i7j}i else b xT| { IP E2t nStartPos = new long[bean.getNSplitter()]; #PpmR_IX nEndPos = new long[bean.getNSplitter()]; 2.zx } QFm~wv8: q;p:)Q" VnB"0"%w b]Xc5Dp{ } ,dM}B- { ke}W
mPy=,xYyC public void run() G92Ya^` { JC6Bs`=s~ //获得文件长度 Q^qdm5}UkW //分割文件 R7)2@;i //实例FileSplitterFetch 6ZCSCBW //启动FileSplitterFetch线程 PO,mg?JG( //等待子线程返回 CE19V:zp try{ spE(s%dgL if(bFirst) BuE=(v2} { Tq7cZe"6 nFileLength = getFileSize(); u"*@k^}( if(nFileLength == -1) '7UW\KEB[} { yrnIQu*Uu System.err.println("File Length is not known!"); %,G&By&, } $s*\yam?| else if(nFileLength == -2) qd=&*? { y()7m/ System.err.println("File is not access!"); %B&y^mZv*\ } U=4tJb else ahno$[ { 3(De> gs$ for(int i=0;i<nStartPos.length;i++) Q,#
) { zCZ]` nStartPos = (long)(i*(nFileLength/nStartPos.length)); Dl2`b">u } Bn 5]{Df for(int i=0;i<nEndPos.length-1;i++) =N5~iMorD- { #@QZ nEndPos = nStartPos[i+1]; zoUM<6q } )zzK\I6/EQ nEndPos[nEndPos.length-1] = nFileLength; hP1H/=~ } x4&<Vr } =@F1J7 Lb2bzZbhx K/+Y9JP9 //启动子线程 =}6yMR!4R< fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 6tC0F= for(int i=0;i<nStartPos.length;i++) y6bl&_ { /T53"+7:0 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {=5Wi| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), e_Ue9c.} nStartPos,nEndPos,i); gZI88Q Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8{@0p"re@ fileSplitterFetch.start(); =.Tc
l"O[ } %jgB;Y // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }0&@J'< siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 5.KhI <[ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", umt*;U= nEndPos = " + nFileLength); 2WK]I1_ // fileSplitterFetch[nPos.length-1].start(); i$GL]0 Cpm&w?6 r~&[Gaw //等待子线程结束 Q Q3a& //int count = 0; g]sc)4 //是否结束while循环 n*UD0U}` boolean breakWhile = false; -RisZ-n* r2WW}W
r &<sSE;5 while(!bStop) 9A@/5Z:v5W { 8U98`#
i write_nPos(); g%P6 f Utility.sleep(500); s<f<:BC breakWhile = true; ;<j[0~qp: ?Vy%<f$ lV4|(NQ9 for(int i=0;i<nStartPos.length;i++) vkFq/+'U { eI%{/> if(!fileSplitterFetch.bDownOver) MGt[zLF9 { sp=;i8Y 3 breakWhile = false; 8.9Z0 break; tVB9kxtE } C,2k W`[V } 0+\%os V if(breakWhile) %r1NRg8 break; c7~+ 5 : MfY8P) -@6R`m=> //count++; ^lB=O //if(count>4) kj$Ks2!W // siteStop(); Hs}3c
R} } k[ {h$ Fx6c*KNX3
=l7@YCj5c System.err.println("文件下载结束!"); ?X'm>R. @ } 2pKkg>/S catch(Exception e){e.printStackTrace ();} G?p !*7N } rb"J{^ 4 f)B@A- P!c.!8C$ //获得文件长度 ]LcCom:] public long getFileSize() 4=BIYC"Lu { q5@N//<DNN int nFileLength = -1; )Z.v fc try{ 3sh}( URL url = new URL(siteInfoBean.getSSiteURL()); 2P`Z>_ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); :5YL!D/& httpConnection.setRequestProperty("User-Agent","NetFox"); DZ-2Z@{PX C;mcb$@ Pv- i. int responseCode=httpConnection.getResponseCode(); reBAxmt if(responseCode>=400) ~pv| { %T~3xQ processErrorCode(responseCode); MBeubS return -2; //-2 represent access is error Wu}84W"!.V } 16J"QUuG ><t4 f(d 8>\tD String sHeader; /0.m|Th'm A_:CGtv: MmI[: for(int i=1;;i++) ECZ`I Z. { $N; Nvp2 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); <$" //Utility.log(in.readLine());
U]o sHeader=httpConnection.getHeaderFieldKey(i); zJ"`40V*; if(sHeader!=null) U=kPxe { Kc3BVZ71 if(sHeader.equals("Content-Length")) ? Zhnb0/ { Gr),o6}p nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); S.4gfY break; DlMT<ld } | e?:Uq } ^~
95q0hq: else 5_H`6-q break; >}"9heF } -nHt6AbqP } K:<j=j@51 catch(IOException e){e.printStackTrace ();} [w1 4hHnq catch(Exception e){e.printStackTrace ();} pXoD*o b ktA5]f; x6qQ
Y<> Utility.log(nFileLength); Whd\Ub8( u~]O #v 8zI*<RX.Q return nFileLength; n'5LY9" } ;2k!KW@ o)V@|i0Js Z9)-kRQz=r //保存下载信息(文件指针位置) EE{]EW( private void write_nPos() *F^t)K2 { /h(bMb Z try{ 4#^E$N: output = new DataOutputStream(new FileOutputStream(tmpFile)); DN$[rCi7 output.writeInt(nStartPos.length); 6rP?$mn2 for(int i=0;i<nStartPos.length;i++) prk@uYCa = { Wx:He8N] H // output.writeLong(nPos); uht>@ WSg| output.writeLong(fileSplitterFetch.nStartPos); Bn4wr output.writeLong(fileSplitterFetch.nEndPos); '{ $7Dbo } f>!H<4
] output.close(); +u[^@>_I0 } I2&R+~ktR catch(IOException e){e.printStackTrace ();} hy]8t1894 catch(Exception e){e.printStackTrace ();} at
)m* } 2FE13{+f {%&!x;% 59@PY! c> //读取保存的下载信息(文件指针位置) x+Ws lN2a private void read_nPos() CVAX?c{ { 2]UwIxzR try{ r.JM!x8 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); p0|PVn.^h int nCount = input.readInt(); 5qL;@Y nStartPos = new long[nCount]; znkc@8_4 nEndPos = new long[nCount]; p=d,kY for(int i=0;i<nStartPos.length;i++) ?!Wh ^su- { fi
tsu"G nStartPos = input.readLong(); L!c.1Rf_ nEndPos = input.readLong(); \z8j6 h } JeXA*U# input.close(); -T8'|"g } 0^25uAD= catch(IOException e){e.printStackTrace ();} 3+4U?~^k* catch(Exception e){e.printStackTrace ();} G'<Ie@$6l } riu_^!"Z_ ~p!=w#/ qydRmi private void processErrorCode(int nErrorCode) P-_2IZiz { _qf$dGqc
System.err.println("Error Code : " + nErrorCode); p[8H!=`K } _g]h \3 = e"RE/q2 _, r6t //停止文件下载 !q[r_wL public void siteStop() (R|_ 6[zy { )4;$;a1 bStop = true; mD_sf_2> for(int i=0;i<nStartPos.length;i++) "Q.KBX v/ fileSplitterFetch.splitterStop(); n|'}W+ dsG:DS`q wZs jbNf`K } ZWb\^N } *K'#$`2 //负责部分文件的抓取 +=Y$v2BZA3 **FileSplitterFetch.java -d]v6q'1 */ 0 /)OAw"m package NetFox; 9$WA<1PK+ #PGpB5vnaA (
d1ho= import java.io.*; NcyE_T import java.net.*; i$g6C Fp(-&,L0fc zLSha\X public class FileSplitterFetch extends Thread { VD90JU]X< m5%E1k$= TNF+yj-|X: String sURL; //File URL iI$;%uY3g long nStartPos; //File Snippet Start Position k fY0u long nEndPos; //File Snippet End Position wu;^fL int nThreadID; //Thread's ID w?JM;'<AYQ boolean bDownOver = false; //Downing is over 8=,?Bh". boolean bStop = false; //Stop identical Ro.br:'Bw FileAccessI fileAccessI = null; //File Access interface }Ryrd!3bY [l*;+N+ Ewa/6=]LA public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException &`2$,zX# { c9ea%7o{0a this.sURL = sURL; _X~xfmU this.nStartPos = nStart; }Sh3AH/ this.nEndPos = nEnd; bcUa'ZfN< nThreadID = id; }PX8#C_P fileAccessI = new FileAccessI(sName,nStartPos);//定位 M6lNdK } `G<|5pe B42qiV2/k P0l.sVqL public void run() *EF`s~ {
:+v4,=fHy while(nStartPos < nEndPos && !bStop) d:g0XP { 2rrC y C X_ (n jMP;$w try{ IQyw>_~] URL url = new URL(sURL); m/"}Y]n! HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); LrhQG httpConnection.setRequestProperty("User-Agent","NetFox"); W0LJXp-v String sProperty = "bytes="+nStartPos+"-"; t&MLgu httpConnection.setRequestProperty("RANGE",sProperty); suFO~/lRno Utility.log(sProperty); uC5W1LyI p&lT! 5P!A a/gr1 InputStream input = httpConnection.getInputStream(); ,F?O} ijk //logResponseHead(httpConnection); X8 x:/]/0 E.4 X, (BZd%! byte[] b = new byte[1024]; ;BW-ag \9 int nRead; ,L;%-}#$ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) G8@LH { X-F:)/$xG nStartPos += fileAccessI.write(b,0,nRead); t|v_[Za}Z //if(nThreadID == 1) -"x25~k!?F // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); v4W<_
7L_ } MNH-SQB | n=%D}W a9p6[qOcd Utility.log("Thread " + nThreadID + " is over!"); l*|m(7s bDownOver = true; @WuG8G //nPos = fileAccessI.write (b,0,nRead); 8C5*: x9l } zxy/V^mu catch(Exception e){e.printStackTrace ();} hEfFMi=a` } Z#flu Q%V } ngl8) B T-.Bof(?w ^dRgYi"(A //打印回应的头信息 wQrD(Dv(yA public void logResponseHead(HttpURLConnection con) wiM-TFT~ { !UX7R\qu| for(int i=1;;i++) FK,Jk04on { wbbr8WiU String header=con.getHeaderFieldKey(i); ZWy,NN1 if(header!=null) F=V_ACU //responseHeaders.put(header,httpConnection.getHeaderField(header)); JA
" Utility.log(header+" : "+con.getHeaderField(header)); %P`|kPW1 else l/6(V: break; M*<Bp } W-ol*S } F5YHc$3^ =f=,YcRn+ 3NlG,e'T2 public void splitterStop() '9Xw_1B { OYY_@'D bStop = true; "kg?Or. } c\N-B,m& fR,7l9<%Zp V6tUijz } G-G\l?R( q Qc-;|8 ez^b{s` /* H
JjW **FileAccess.java (!dwUB *//文件访问(定位,写) TuMD+^x package NetFox; ka[%p, H import java.io.*; @^K_>s9B [p 8fg!| $6yr:2Xvt public class FileAccessI implements Serializable{ XV0t
8#T2 42 &m) //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 L`0}wR?+ RandomAccessFile oSavedFile; S0mF%" long nPos; @+^5ze\ a+p_47 xa U?yKwH^{ public FileAccessI() throws IOException %|gj46 { ]?j[P=\ this("",0); =y1/V'2E } GoRSLbCUR
P:tl)ob a3(q;^v public FileAccessI(String sName,long nPos) throws IOException H_+!. { 6ZwFU5)QE/ oSavedFile = new RandomAccessFile(sName,"rw"); D3kx&AR this.nPos = nPos; etLA F oSavedFile.seek(nPos); a?ii)GGq } w@ \quy: t?cO>4*| XCku[?Ix public synchronized int write(byte[] b,int nStart,int nLen) [iT#Pu5 { 6j=a int n = -1; rw]*Nxgr try{ ]{E{ IW8 oSavedFile.write(b,nStart,nLen); 3&vUR(10 n = nLen; 4
n\dh<uY } ,L,?xvWG catch(IOException e) X~5kgq0" { 6$"0!fl> e.printStackTrace (); DeL7sU } oB] U0t~H{-H F!qt#Sw!\ return n; >aV
Q } ^q
?xi5w (vqI@fB';u SSG}'W!z } OBJk\j+Wi 4?F7% ^vr y|E{] /* 6=xbi{m$ **SiteInfoBean.java \IG"Te */ 4'ymPPY package NetFox; Xv1mjHZCC JYU0&nZl4 =/]d\JSp public class SiteInfoBean { ,6FmU$
Kn ,c\3b)ax f MDM\&f private String sSiteURL; //Site's URL 3-Xc3A=w private String sFilePath; //Saved File's Path C!r9+z)< private String sFileName; //Saved File's Name 6Jf\}^4@k private int nSplitter; //Count of Splited Downloading File h(VF p 6FPdt) W2\Q-4D public SiteInfoBean() TWFi.w4pY {//nSplitter的缺省值为5 ^@0-E@ {c
//default value of nSplitter is 5 +r
2\v this("","","",5); WSPlM"h } `&-)(# 1Ev#[FOc t/9,JG public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) y
2v69nu~q { ~Q)137u]P sSiteURL= sURL; 8!uqR!M<C sFilePath = sPath; 'WW[' sFileName = sName; crdp`}} this.nSplitter = nSpiltter; h#iFp9N ZT;:Hxv0N ;\5^yDv[e } ssy+x;<x, [rt+KA M)oJ06`K public String getSSiteURL() %7*Y@k-)o { 5%E.UjC return sSiteURL; 47c` ) *Hc } ^,.G<2Kx& k TLA["<m !z.C}n5F public void setSSiteURL(String value) }4n?k'_s? { d\{#*{_A sSiteURL = value; @94_'i7\ }
>v DD. '<YVDB&-d, _(<D*V[ public String getSFilePath() 9-9:]2~g! { bl)iji`] return sFilePath; FGP~^Dr/ } 68^5X"OGF m%hUvG| i q3s
+?& public void setSFilePath(String value) t,2Q~ied= { faVR % sFilePath = value; `Oc`I9 } A%G
\
AT 'h6Vj6 Gv};mkX[N public String getSFileName() u,6 'yB'u { p2UZqq2 return sFileName; 'e(`2 } N8>;BHBV! ktr l | Hlw0ia public void setSFileName(String value) v<`1z?dch { EQ j2:9f sFileName = value; f
V|Zh } GoGo@5n(Z i*JbFukG Q7]VB p4 public int getNSplitter() }Dig'vpMx { wb>>bV+U return nSplitter; ;b""N, } myj^c>1Iz U 6y
;V k-(hJ}N public void setNSplitter(int nCount) N2"4dVV; { OudD1( )W nSplitter = nCount; cN> z`xl } ZZa$/q" } 9xvE?8;M# q1nGj 'ErtiD /* o6$Q>g`] **Utility.java 3f{%IU(z */ 6'M"-9?G package NetFox; 7]q$sQ hwmpiyu 4g#pQ public class Utility { oy-Qy a/.O,&3
eTc0u;{V public Utility() )p MZ5|+X { VK+#!!Ha z^/aJ@gQ >Hr0ScmN@" } (YjY=F Uv6#d":f; //线程睡眠 f.gkGwNk public static void sleep(int nSecond) 7/;Xt& { =W9;rQm try{ k!]Tg"]JAh Thread.sleep(nSecond); wR;_x x } ]FLuiC catch(Exception e) W"mkNqH { %$
^yot e.printStackTrace (); edPnC
{?s } _|MY/SN4A } j.GpJDq /tno`su; //日志 4QnJ;&~ public static void log(String sMsg) Pl=X<Bp { OC'cP[$ _ System.err.println(sMsg); H~c+L'= } dG|srgk+ !U$ %Jz ~9qDmt,i public static void log(int sMsg) |52VHW8c { vm+EzmO,! System.err.println(sMsg); BCya5!uy } _Gy*" ;E } AM}-dKei| GYiUne$ 31 |Vb /* I\sCH **TestMethod.java (r,RwWYm */ #jV6w=I package NetFox; Mi\f?
KM|[:v S<Q6b_D public class TestMethod { >P5 EW!d Dyp'a -aGv#!aIl public TestMethod() FXFQ@q*}v { ///xx/weblogic60b2_win.exe YTq>K/ try{ uH]n/Kv1, SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); /Mf45U< //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); LiJ;A* SiteFileFetch fileFetch = new SiteFileFetch(bean); io:?JnQSA fileFetch.start(); WKpHb:H } .N]^g# catch(Exception e){e.printStackTrace ();} pTmG\wA~$ +D1;_DU +bd/*^ } MQ"<r,o?: 9Dd/g7 }6eWdm!B public static void main(String[] args) n$}c+1
{ a2iaP new TestMethod(); jHB,r^:' } bdqo2ZO } lN 1 T\ 点击下载更多相关资料
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