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/* 4=#QN **SiteFileFetch.java (t"YoWA#m */ PHB\)/ package NetFox; *<
SU_dAh import java.io.*; N]<~NG:6b import java.net.*; F0o18k_" 0 ^-b} (HP={MrV public class SiteFileFetch extends Thread { :L+zUlsf E Zu ::Ve ,-0 SiteInfoBean siteInfoBean = null; //文件信息Bean n$\6}\k long[] nStartPos; //开始位置
=}1~~ long[] nEndPos; //结束位置 B1AF4}~5 FileSplitterFetch[] fileSplitterFetch; //子线程对象 u{y5'cJ{ long nFileLength; //文件长度 {3yws4 boolean bFirst = true; //是否第一次取文件 RWEgUDX^/ boolean bStop = false; //停止标志 g]hn@{[ File tmpFile; //文件下载的临时信息 [+[fD DataOutputStream output; //输出到文件的输出流 fe]T9EDA ^dp[Z,[1z //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Ni;{\"Gt public SiteFileFetch(SiteInfoBean bean) throws IOException =K&q;;h { &b#NF1Q. siteInfoBean = bean; 4h2bk\z- //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); hF?\K^tF tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); e1Z;\U$&. if(tmpFile.exists ()) #xE>]U { s9)8{z bFirst = false; hrtN.4p[ read_nPos(); %>QSeX } e[Ul"pMvS` else l=.InSuLT { DyV[+P nStartPos = new long[bean.getNSplitter()]; (j\UoKLRt nEndPos = new long[bean.getNSplitter()]; TTjjyZ@ } 1,sO =p)Yg _KlPbyLU uc
`rt" ieK'<%dxF } ]&%X(jWyn z@40g)R2A SZ1pf#w! public void run() Tr+Y@]"
{ os0"haOI9h //获得文件长度 'G
By^hj? //分割文件 <GU(/S!} //实例FileSplitterFetch [_z2z6 //启动FileSplitterFetch线程 S&g- //等待子线程返回 B?>#cpWj try{ c[eGpZ] if(bFirst) Tlv|To { mm~o%1|WR nFileLength = getFileSize(); 1F%*k &R if(nFileLength == -1) 9hi(P*%q { ;?[ +vf") System.err.println("File Length is not known!"); E?W!.hbA } ZJ'H y5? else if(nFileLength == -2) \~m%4kzG8J { REe%>|
System.err.println("File is not access!"); @ F"ShT0 } {`SGB;ho
else zj0pP{y { D"><S<C\C for(int i=0;i<nStartPos.length;i++) &rE l { X\:(8C;+ nStartPos = (long)(i*(nFileLength/nStartPos.length)); OTbjZ( } {d5ur@G1 for(int i=0;i<nEndPos.length-1;i++) G7#~=W
2M { xn#I7]]G nEndPos = nStartPos[i+1]; -)c"cgx. } x[<#mt nEndPos[nEndPos.length-1] = nFileLength; ^.aEKr } Ib<+m%Ac } <UHf7:0V kT3;%D^ uTFEI.N //启动子线程 vVRCM fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 1 jd=R7 for(int i=0;i<nStartPos.length;i++) 9U%}"uE { ;R>42
qYF fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), |zegnq~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), !)1Zp* nStartPos,nEndPos,i); rs)aEmvC Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); xH.q fileSplitterFetch.start(); krT!AfeV } {.[,ee-)9 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), v}t:}M<; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); "h|0]y^2 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", D+nj[8y nEndPos = " + nFileLength); @G&xq"Fg7 // fileSplitterFetch[nPos.length-1].start(); U\plt%2m> s.Ic3ITd, 15yV4wHr //等待子线程结束 "pJEzC //int count = 0; ))-M+CA //是否结束while循环 U0=zuRr n boolean breakWhile = false; 246!\zf /-9+( "PP0PL^5F while(!bStop) hndRgCo { k:yu2dQh write_nPos(); S~`AnX3! Utility.sleep(500); mAERZ<I breakWhile = true; T[II;[EiE ~ZIRCTQ" P_Ja?)GT for(int i=0;i<nStartPos.length;i++) zb*4Nsda: { FO3*[O if(!fileSplitterFetch.bDownOver) icbYfgQ { |Y8o+O_` breakWhile = false; +m},c-,=$w break; |I<-x)joIK } 0p2O8>w^% } 4B,A+{3yL if(breakWhile) / =<ul-K break; #GJh:#tt^ Qi L _^A
NJ7 //count++; _Pm}]Y:_ //if(count>4) F#R\Ot,hv // siteStop();
K8we* } Z9EQ|WfS#- _ o3}Ly} a#j^gu$m System.err.println("文件下载结束!"); xJ.!Q)[ } q/G5aO* catch(Exception e){e.printStackTrace ();} TniKH(w/ } `cRB!w=KHV U6 R4UK *XR~fs?/*W //获得文件长度 y`dzo`f public long getFileSize() (NlEb'~+ { [Y~ s int nFileLength = -1; Z*B(L@H try{ (KU@hp-\ URL url = new URL(siteInfoBean.getSSiteURL()); 0u9h2/ma HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ''YjeX httpConnection.setRequestProperty("User-Agent","NetFox"); (!=aRC.- _YUF /B' Q*(C)/ QW int responseCode=httpConnection.getResponseCode(); +5\\wGo< if(responseCode>=400) ,_-*/- 7;8 { d8I:F9 processErrorCode(responseCode); bME3" e{O
return -2; //-2 represent access is error w#b2iE+Bw } }e @-[RJ! `v
er "s; 9D21e(7X String sHeader; EF~PM pdu {<n)zLy for(int i=1;;i++) N/=3Bs0y- { Z}f_\d' //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); S!cXc/H-R //Utility.log(in.readLine()); 1i2O]e! sHeader=httpConnection.getHeaderFieldKey(i); p$<qT^]& if(sHeader!=null) a06q-3zw { }A^,y if(sHeader.equals("Content-Length")) P
ie!Su` { |0mI3r nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); h!]A(T\J break; K@hUif|([ } 'kK%sE } oPBjsQ else `7ZJB$7D|* break; '& :"/4@) } _\[G7 } ,oil}N( catch(IOException e){e.printStackTrace ();} /L^dHI]Q catch(Exception e){e.printStackTrace ();} 2N]s}/l 8m0sEV> xx8na8 Utility.log(nFileLength); V|`|CVFo] YJ$
=`lIM kRPg^Fw"Vw return nFileLength; 0rUf'S
?K } @9a=D<'> mws.) A@r,A?( //保存下载信息(文件指针位置) G.T1rUh= private void write_nPos() !HYqM(|{. { xcA:Q`c.{ try{ 4N&}hOM'S output = new DataOutputStream(new FileOutputStream(tmpFile)); 2D"/k'iA output.writeInt(nStartPos.length); 470Pig>I8 for(int i=0;i<nStartPos.length;i++) m6D4J=59 { sn%fE // output.writeLong(nPos); kF .b) output.writeLong(fileSplitterFetch.nStartPos); dPId=
w) output.writeLong(fileSplitterFetch.nEndPos); |zKcL3* } 5$X{{j2 output.close(); %#~Wk|8} Q } ,~#hHhR_ catch(IOException e){e.printStackTrace ();} J)o%83// catch(Exception e){e.printStackTrace ();} sP%.o7&n } >rubMGb 0M?}S~p] ><~hOK?v //读取保存的下载信息(文件指针位置) CS49M private void read_nPos() yk/XfwQ5 { \\JXY*DA:+ try{ +L6d$+ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ?a@l.ZM* int nCount = input.readInt(); v},sWjv nStartPos = new long[nCount]; ZtDpCl_ nEndPos = new long[nCount]; \ :.p8` for(int i=0;i<nStartPos.length;i++) h>?OWI { kTV D4Z= nStartPos = input.readLong(); Tx_LH"8 nEndPos = input.readLong(); 7Z_iQ1 } )SuJK.IF input.close(); 0P 42C{>'w } 5]E5 V@C catch(IOException e){e.printStackTrace ();} ?$Pj[O^hl catch(Exception e){e.printStackTrace ();} ~m7+^c@, } |a+8-@-Tj 2 6A#X ZUycJ-[ private void processErrorCode(int nErrorCode) OgX."pK { G)Y!aX System.err.println("Error Code : " + nErrorCode); _[W=1bGJ } U' Cp3> DNPK1e3a{ x&
S >Mr //停止文件下载 {$^|^n5j public void siteStop() _ 17"T0 { mD!imq%= bStop = true; _ sd?l for(int i=0;i<nStartPos.length;i++) gK /K Z8 fileSplitterFetch.splitterStop(); 4)_ [)MZ\j e]QkZg2?Yn #~b9H05D } -84Z8?_ } aO1cd_d6x_ //负责部分文件的抓取 gE1" .qC **FileSplitterFetch.java ryN-d%t? */ |dK-r package NetFox; PLD!BD )8;'fE[p} bHCd|4e,2 import java.io.*; Vq\6c import java.net.*; (c"!0v IF=rD-x TR |; /yJ public class FileSplitterFetch extends Thread { l-&f81W dU,/!|.K \iFE,z String sURL; //File URL (ZYOm long nStartPos; //File Snippet Start Position <qBPN{'a" long nEndPos; //File Snippet End Position dZ*o H#B int nThreadID; //Thread's ID LBg#KQ@ boolean bDownOver = false; //Downing is over )lbF'.i boolean bStop = false; //Stop identical V4 7Fp FileAccessI fileAccessI = null; //File Access interface @azS)4L WKG=d]5 1na[=Q2 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException E]
[DVY { bpkn[K"( this.sURL = sURL; ^P[*yf this.nStartPos = nStart; UxW~yk this.nEndPos = nEnd; bWqGypq4 nThreadID = id; QO8/?^d fileAccessI = new FileAccessI(sName,nStartPos);//定位
[7bY( } +=R:n^r^, ?NL2|8 \vI_%su1N public void run() XP'KgTF { ]n+:lsiV while(nStartPos < nEndPos && !bStop) HN:{rAIfc { }~7>S5 |^ qW
8]O|$8'" try{ <^=k~7m URL url = new URL(sURL); 7cC$) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /<mc~S7 httpConnection.setRequestProperty("User-Agent","NetFox"); C oaqi`v4T String sProperty = "bytes="+nStartPos+"-"; *q^'%' httpConnection.setRequestProperty("RANGE",sProperty); !MbRI Utility.log(sProperty); $z<CkMP!U7 _?{2{^v &rn,[w_F[ InputStream input = httpConnection.getInputStream(); F?UL0Q|u v //logResponseHead(httpConnection); \1tce`+ nP}/#Wy IflpM ] byte[] b = new byte[1024]; /fX]Yu int nRead; $1axZ~8sS while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) HwDb &pP" { l6i 2!&8P% nStartPos += fileAccessI.write(b,0,nRead); )T>a|. //if(nThreadID == 1) 3}"VUS0wh // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <Sz9: hg- } h.67]U7m 4EOu)# c6e?)(V> Utility.log("Thread " + nThreadID + " is over!"); _%t w#cM bDownOver = true; U<*dDE~z //nPos = fileAccessI.write (b,0,nRead); *@O;IiSE } 0Vg8o @ catch(Exception e){e.printStackTrace ();} $lO\eQGxB } =%a.C(0&G } }%VHBkuc 1Ao"DxZHy7 "MyYu}AD //打印回应的头信息 o:?IT/> public void logResponseHead(HttpURLConnection con) 7QQnvoP { R8ZW1 for(int i=1;;i++) qWWy}5SOm { o}[wu:>yk String header=con.getHeaderFieldKey(i); 1f}Dza9 if(header!=null) a1?Y7(alPU //responseHeaders.put(header,httpConnection.getHeaderField(header)); y_\d[ Utility.log(header+" : "+con.getHeaderField(header)); *QrTZ$\C else Ngg (<ZN break; Cu0 /TeEM } *{XbC\j } A>X#[qx EB)0 iQ p}C3<[Nk public void splitterStop() RlpW)\{j? { `/0FXb
8h bStop = true; tf>?; } ](%-5G1< r1,RloyZS ,#s}nJ4 } 9D&ocV3QV grv 3aa@ ll6~8PN /* (Y-7B **FileAccess.java k+_pj k *//文件访问(定位,写) uHy^ Bq package NetFox; !W8$-iq import java.io.*; dD#A.C,Rz 3Y>!e# 42Z2Mjtk public class FileAccessI implements Serializable{ K !`t EW[ :[,n`0lH //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 :c
c#e&BO RandomAccessFile oSavedFile; <x,$ODso long nPos; {"O'kx [7$.)}Q- '#^ONn STn public FileAccessI() throws IOException ~]}7|VN.} { PE3l2kr this("",0); mhh8<BI } T'FRnC^~ iQ:]1H s f\1)BZ'I public FileAccessI(String sName,long nPos) throws IOException nd-y`@z { %|4Nmf$:Og oSavedFile = new RandomAccessFile(sName,"rw"); ?FD^S~bz- this.nPos = nPos; ]Rz]"JZ\S oSavedFile.seek(nPos); $dq
R]' } e3&R3{ {5:y,=Y Qb/qUUQO;0 public synchronized int write(byte[] b,int nStart,int nLen) FhW\23OC { 5v8_ji#l[ int n = -1; 4h?[NOA" try{ 9=Y-w s oSavedFile.write(b,nStart,nLen); EZao\,t n = nLen; .#P'NF(5# } `5Q0U%`W catch(IOException e) W$
M4# { UP^{'eh e.printStackTrace (); Wcw$
Zv } /qEoiL### .XTBy/(0 ?~hC.5 return n; JuS#p5E # } u1(`^^Ml )y_MI
r zJOL\J' } f8!*4Bw b<NI6z8\ 3`$- /* K'Wg_ihA **SiteInfoBean.java p8frSrcU */ ]^p6dbzWe package NetFox; &+Xj%x.] _|`S9Nms ,)|nxX public class SiteInfoBean { {IJ,y27 rOEk%kJ .sgP3Ah private String sSiteURL; //Site's URL .e~17}Ka} private String sFilePath; //Saved File's Path `~F= private String sFileName; //Saved File's Name *{/BPc0* private int nSplitter; //Count of Splited Downloading File txw:m*(% 4DaLmQ2O 'WUd7 public SiteInfoBean() Q!iM7C!8 {//nSplitter的缺省值为5 iG^o@*}a //default value of nSplitter is 5 1!~=8FTv this("","","",5); @))PpE`co8 } qlNK } 2r]80sWY B;@7 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) fczId" { |gg6|,Bt4 sSiteURL= sURL; tI ~.3+F sFilePath = sPath; =`Pgo5A sFileName = sName; sEm-Td+A5 this.nSplitter = nSpiltter; mfc\w' pa*bqPi 3dTz$s/[ } 8m\*~IX= fucG 9B Q30AaG}f public String getSSiteURL() ~7IXJeon { "AMbU68 return sSiteURL; |
U ) } 3A!`U6C( YzNSZJPD $F"'=+0 public void setSSiteURL(String value) Qyx%:PE { =dSH8C" sSiteURL = value; s]@()?.E$ } T{<riJ`O Zn0e#n F !g>fIg public String getSFilePath() o'O;69D]tX { 7&;M"?m& return sFilePath; Wa7-N4 } DybuLB$f +}[M&D sxkWg> public void setSFilePath(String value) Au~l
O { &c>%E%!" sFilePath = value; p8,Rr{ } w+($=n~ 0N>NX?r 0h=NbLr|S- public String getSFileName() iq*]CF { "NWILZwEV return sFileName; d5jZ? } *oZ]k`-!8 (dmLEt ?gD^K,A Hd public void setSFileName(String value) c_wvuKa
{ o{MF'B# sFileName = value; 4@19_+3 } i;B &~ Sy()r 6n !1(*D*31 public int getNSplitter() L8R{W0Zr>! { ?TTtGbvU return nSplitter; m#w1?y)Z@X } b?i5C4=K f3PDLQA Bl[4[N public void setNSplitter(int nCount) /5M0[C E { %]G'u nSplitter = nCount; qHVZsZ } [QUaC3l) } k6eh$*! <OgwA$abl% dmA#v:$1 /* PzF>yG[ **Utility.java jEh Px */ CZZwBt$P package NetFox; 28 Q\{Z. vo(riHH A; _Zw[ public class Utility { -So$f-y R`
g'WaDk '_ZiZ4O public Utility() T8^`<gr. { Ob!NC& &6="r} VN3[B
eH } ^5E:hW[* ~t+T5`K //线程睡眠 aFw \w>*^ public static void sleep(int nSecond) kB[l6` { pYN.tD FO try{ h4ozwVA Thread.sleep(nSecond); Q&5s,)w- } kF]sy8u] catch(Exception e) G]v BI= { UpTVLx^c e.printStackTrace (); mY=Q#nG } c,j[ix } '8w}m8{y {<cL@W //日志 MD9 8N{+[| public static void log(String sMsg) E4N/or { DbWaF5\yD System.err.println(sMsg); 1VKu3 } "%(SLQOyy l"zwH eQqnPqi- public static void log(int sMsg) v`r![QpYf { -#Bk System.err.println(sMsg); u_HCXpP!Q } ]A&pXAM } k'8tqIUN] F5y0(=$T O\J{4EB@. /* mV'-1 **TestMethod.java NoOrQ m */ O2qy[]km package NetFox; 6n A/LW\x WhT5NE9t fK|P144 public class TestMethod { k*4!rWr0r& %ZsdCQc{` HT:V;?" public TestMethod() ^>/~MCyM. { ///xx/weblogic60b2_win.exe XjXz#0nR try{ b|-}?@&7&q SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); i&TWIl8 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); cY^'Cj SiteFileFetch fileFetch = new SiteFileFetch(bean); b($9gre>mI fileFetch.start(); QQ,V35Vp[ } +mPVI catch(Exception e){e.printStackTrace ();} }Y"vUl_I2 G\z5Ue* 8kLHQ0pmu } Hp>_:2O8s -K (>uV!? w2SN=X~# public static void main(String[] args) Z'UhJu D5 { }Uu#N H new TestMethod(); hnimd~E52k } g4 3(N!@g } &gF9VY 点击下载更多相关资料
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