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/* `JC!uc **SiteFileFetch.java uo0(W3Q * */ N4Ym[l package NetFox; eWFlJ;= import java.io.*; z}5XLa^ import java.net.*; \%K6T)9 !vU[V,~
=LC5o2bLy public class SiteFileFetch extends Thread { = #`FXO1C :c\NBKHv* ',.Xn`c SiteInfoBean siteInfoBean = null; //文件信息Bean ."2V:;; long[] nStartPos; //开始位置 .]"
o-(gB long[] nEndPos; //结束位置 )}EwEM FileSplitterFetch[] fileSplitterFetch; //子线程对象 87-oR}/r long nFileLength; //文件长度 QRRZMdEGs[ boolean bFirst = true; //是否第一次取文件 P?I"y,_ p boolean bStop = false; //停止标志 :r\<DVj File tmpFile; //文件下载的临时信息 f~53:;L/ DataOutputStream output; //输出到文件的输出流 ALG + }"szL=s //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ,HkJ.6KF public SiteFileFetch(SiteInfoBean bean) throws IOException 35ng_,t$ { </fzBaTo siteInfoBean = bean; ^Tl|v'
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); @+xQj.jNC tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); M|\XFO if(tmpFile.exists ()) \d6A<(!=v { 4"GY0)
Q bFirst = false; J9o]$.e read_nPos(); 0g1uM:; } vnKUD| else 6(eyUgnb { s}5;)>3~@ nStartPos = new long[bean.getNSplitter()]; :/u
EPki nEndPos = new long[bean.getNSplitter()]; 5nk]{ G> V } XX+4X*(o /m%;wH|6% V%"aU}
5YRa2#d } M]oaWQu wE'~Qj &n['#7 <(! public void run() WXJ%bH { se_1wCYz //获得文件长度 gg<lWeS/3 //分割文件 /:B!hvpw //实例FileSplitterFetch -c Mqq$ //启动FileSplitterFetch线程 Obbjl@]
//等待子线程返回 \h :$q E7 try{ UF?qL1w if(bFirst) d^w6_ { Ug/b;( dJ' nFileLength = getFileSize(); qg|SBQ?6 if(nFileLength == -1) 0DGXMO$; { yAaMYF@ System.err.println("File Length is not known!"); U1I2+;"#A } mzDbw-# else if(nFileLength == -2) @<h@d_8^k { o4U9jU4<" System.err.println("File is not access!"); <"6}C)G } caS5>wk`R else oPl^tzO { U4Il1|
M& for(int i=0;i<nStartPos.length;i++) QO~!S_FRH { @?TOg{: nStartPos = (long)(i*(nFileLength/nStartPos.length)); iXI >>9 } a:C
ly9 for(int i=0;i<nEndPos.length-1;i++) G8j$&1`: { H|5\c= nEndPos = nStartPos[i+1]; Gq?JMq# } VTS8IXz nEndPos[nEndPos.length-1] = nFileLength; x:G uqE } qEE
V& } NU O9, |%Pd*yZA ~~z}yCl //启动子线程 `i;f fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; <8~bb-U$ for(int i=0;i<nStartPos.length;i++) M/T
ll]\| { BVU>M*k fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), q9|'!m5K siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), `5:b=^'D/ nStartPos,nEndPos,i); 4~4D1 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); bs/Vn'CE fileSplitterFetch.start(); HZKqGkE } ogtl
UCUD // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), c3lU siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); t
7 dcaNBZ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", w6aq/m"' nEndPos = " + nFileLength); o-c.D=~ // fileSplitterFetch[nPos.length-1].start(); yJNQO'wcv D5^wT>3> _e:c
22T' //等待子线程结束 R ` //int count = 0; c <Fr^8 //是否结束while循环 /?VwoSgV^ boolean breakWhile = false; g[4pG`z vq=nG]cE) EZypqe):/C while(!bStop) +8h!@ { XcLjUz ? write_nPos(); q8#zv_>K Utility.sleep(500); Qq+$ea?> breakWhile = true; x}B3h9] OO#_0qK y\k#83aU| for(int i=0;i<nStartPos.length;i++) opqY@>Vh& { Y`3V&8X if(!fileSplitterFetch.bDownOver) 8#L
V
oR { HtpZ5 breakWhile = false; t>Lq
"]1 break; n<3qr}ZG^ } m) QV2n } #g=7fu{n: if(breakWhile) wwaw|$ break; B63puX{u# 0 7b=Zhh &PZ&'N|P //count++; i24t$7q //if(count>4) eCFMWFhC // siteStop(); maTQ0GX } 4 ))Z Bq? ;S0Kf{DN2 JCFiKt9n System.err.println("文件下载结束!"); ^pwT8Bp } 2fN2!OT catch(Exception e){e.printStackTrace ();} P8[rp } Sq:,6bcG 6--t6>5 \w#)uYK{i_ //获得文件长度 G{CKb{ public long getFileSize() FNlS)Bs { '-X[T} int nFileLength = -1; Q-<h)WTA try{ 6pP:Q_U$ URL url = new URL(siteInfoBean.getSSiteURL()); }iIZA>eF HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); C2
4"H|D httpConnection.setRequestProperty("User-Agent","NetFox"); 'Y2ImSWj )[wB:kG z|bAZKSRYx int responseCode=httpConnection.getResponseCode(); /:B2-4>Q! if(responseCode>=400) 4g+Dp&U { =aB c.PJ^ processErrorCode(responseCode); "o)jB~:L return -2; //-2 represent access is error cY]BtJ# } hg7^#f95u Zz/
z7~{ WYJH+"@%j String sHeader; xB`j*
% }i$ER,hXh QZ&
4W for(int i=1;;i++) 9$f% { +R"Y~
m{F //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); $:|?z_@ //Utility.log(in.readLine()); Y[!s:3\f sHeader=httpConnection.getHeaderFieldKey(i); CFXr=.yz if(sHeader!=null) B@k2lHks( { ?`T Q'#P` if(sHeader.equals("Content-Length")) mRO@ZY;5 { "*<)pnJ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); G,!{Q''w break; P](/5KrK } .no<#l } ULH<FDot else @)XR break; 9CG&MvF c } O@HL%ha } QpCTHpZ catch(IOException e){e.printStackTrace ();} (}m2} catch(Exception e){e.printStackTrace ();} U0=: `G2l qr4.s$VGs* 1R,SA:L$ Utility.log(nFileLength); # Rhtaq9 x7GYWK
9 p(>D5uN_}5 return nFileLength; s}q tM.^W } p~WX\; qC6@ n|fKwWB\ //保存下载信息(文件指针位置) ZZM;%i-B private void write_nPos() RiG]-K: { #+&"m7
s try{ tH=jaFJ output = new DataOutputStream(new FileOutputStream(tmpFile)); ZZ>F ^t output.writeInt(nStartPos.length); GC`/\~TM for(int i=0;i<nStartPos.length;i++) v,|jmv+: { [}I|tb>Pg // output.writeLong(nPos); wEZieHw output.writeLong(fileSplitterFetch.nStartPos); T]x]hQ output.writeLong(fileSplitterFetch.nEndPos); Q[Gs%/> } MFn\[J`Ra output.close(); "[ieOFI } M1=eS@ catch(IOException e){e.printStackTrace ();} W2{4s
1 catch(Exception e){e.printStackTrace ();} .On3ZN } h<G7ocu ! ; GEr8_7 h t3P@; //读取保存的下载信息(文件指针位置) =6a=`3r!I private void read_nPos() !t[;~`d9 { qND:LP\_v try{ SohNk9u[8 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); E|3[$?=R int nCount = input.readInt(); </pt($ nStartPos = new long[nCount]; @HE<\Z{ KI nEndPos = new long[nCount]; .P#t"oW} for(int i=0;i<nStartPos.length;i++) +
B<7]\\M { N6Dv1_c, nStartPos = input.readLong(); xb2j
|KY7 nEndPos = input.readLong(); *B)10R } NIAji3 input.close(); >9y!M'V } %?3$~d\n catch(IOException e){e.printStackTrace ();} H#M;TjR catch(Exception e){e.printStackTrace ();} 0a9[}g1=# } XVF!l>nE 5Y 7 %Z m2HO .ljc private void processErrorCode(int nErrorCode) $F1Am% { +7{8T{ System.err.println("Error Code : " + nErrorCode); X4L@|"ZI } \0K&2' M< H+$}[ .pG`/[*a //停止文件下载 558!?kx$ public void siteStop() sf
O{.#5< { 5S[:;o bStop = true; x\IuM for(int i=0;i<nStartPos.length;i++) kZ;Y/DH fileSplitterFetch.splitterStop(); IOa@dUh7a, Wj8WT)cB Gzp*Vr } PZY6
I } X/buz //负责部分文件的抓取 r?9".H **FileSplitterFetch.java 3e>U(ES */ e~SRGyIww package NetFox; +i[@+`
v|dt[>G ~Rx`:kQ import java.io.*; ^A=2#j~H\ import java.net.*; WD5jO9Oai %jJIR88 _$/Bt?h public class FileSplitterFetch extends Thread { ?4# ]x66/O\0u gH.$B' String sURL; //File URL 0EasPbp long nStartPos; //File Snippet Start Position >%5GMx>m long nEndPos; //File Snippet End Position lk[u int nThreadID; //Thread's ID WpOH1[8v boolean bDownOver = false; //Downing is over g][n1$% boolean bStop = false; //Stop identical vsPIvW!V FileAccessI fileAccessI = null; //File Access interface S_ra8HY8 5~$WSL?O) HIUP
=/x public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException zCv)%y { hOYX this.sURL = sURL; <nK@+4EH"o this.nStartPos = nStart; ~.#57g F" this.nEndPos = nEnd; (w`_{%T nThreadID = id; 0>"y)T3 fileAccessI = new FileAccessI(sName,nStartPos);//定位 11Uu5e!. } pU<GI@gU S~W;Ld<>fB efuiFN; public void run() AF,;3G { P
F);KQ while(nStartPos < nEndPos && !bStop) 2km0 { HdyE`FY \ C~^T=IP ti 3S'K0t try{ }S4+1
U3 URL url = new URL(sURL); %L$?Mey HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8w#4T:hsuN httpConnection.setRequestProperty("User-Agent","NetFox"); 4pZKm-dM^ String sProperty = "bytes="+nStartPos+"-"; ~+,ZD)AKi4 httpConnection.setRequestProperty("RANGE",sProperty); jAovzZ6BL Utility.log(sProperty); `)kxFD_bH :2+z_+k}< 3#aLCpVla InputStream input = httpConnection.getInputStream(); ,Y16m{<eC //logResponseHead(httpConnection); \tA@A ~fs}
J #ApmJLeCO byte[] b = new byte[1024]; 4;(W0RQa int nRead; CtUAbR while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 9?^0pR p { ]AZCf`7/? nStartPos += fileAccessI.write(b,0,nRead); ~jzT;9: //if(nThreadID == 1) .yHK // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); FbH@qHSH } ;kZJnN"y Q(R-8" Galh _;= Utility.log("Thread " + nThreadID + " is over!"); m|;gl|dTB bDownOver = true; m8eoD{ //nPos = fileAccessI.write (b,0,nRead); ;iQw2XhT } y-S23B( catch(Exception e){e.printStackTrace ();} /XNC^!z6Js } -S&d5(R } Zqv yTNHM_P IsVR4t] //打印回应的头信息 N7GZ'-t^Er public void logResponseHead(HttpURLConnection con) HdTB[( { W"\+jHF" for(int i=1;;i++) sxdDI?W4 { ma/<#l^} String header=con.getHeaderFieldKey(i); r=xec@R]* if(header!=null) ys:F //responseHeaders.put(header,httpConnection.getHeaderField(header)); )`2ncb
Utility.log(header+" : "+con.getHeaderField(header)); -
^Y\'y2 else `Gx
5=Bm; break; |oQhtk8. } m 0Uu2Z4 } JdUI:( 9H53H"5q VMS3Q)Ul public void splitterStop() A;e"_$yt8 { `=kiqF2P} bStop = true; I]cZcx,<q } l[<o t9P[ 2Ky|+s[`[ {bC(>k|CQ } fP- =wd jF(R;?, zQ+
%^DT1 /* F3 g$b,RMH **FileAccess.java i?V:+0#q\] *//文件访问(定位,写) 7f*b5$+r package NetFox; |o^mg9 import java.io.*; j'Gezx^.<e &g=6K&a$a WDr=+=Zj public class FileAccessI implements Serializable{ {cjp8W8hS ?B`c<H"
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 .3wx}!:*| RandomAccessFile oSavedFile; Ci[Ja#p7$h long nPos; )EcfEym.> -I z,vd TxKNDu
public FileAccessI() throws IOException *ozXilO { }h|HT this("",0); !u/c'ZLZ> } i-4?]h k
CUft %6&c3,?U\n public FileAccessI(String sName,long nPos) throws IOException &KV$x3 { B- |C%~fe oSavedFile = new RandomAccessFile(sName,"rw"); c0_512 this.nPos = nPos; H2+V1J= oSavedFile.seek(nPos); -k%|sqDZj } ACI.{`SrQ= ?\<Kb|Q zs'Jgm.v public synchronized int write(byte[] b,int nStart,int nLen) H1
i+j;RN { Y~I0\8s- int n = -1; ?xwZ< A try{ >
lI2r} oSavedFile.write(b,nStart,nLen); ^a| n = nLen; 0&3zBL%Bo } :#UA!|nV catch(IOException e) M?DXCsZ,)s { $_|jI
^ e.printStackTrace (); n8q%>.i7 } Z5*O\kJv [L
(m')dSZ return n; #?Ob->v } fJ%A_N} VK|$SY( LX(`@-<DH } 20M]gw] cA{,2CYc kZc Ge* /* N0YJ'.=8, **SiteInfoBean.java awLSY:JI */ GwG(?_I" package NetFox; MEtKFC|p V9;IH<s: Vp8!-[R public class SiteInfoBean { j k])S~xl? ph3dm\U. C2L=i3R private String sSiteURL; //Site's URL JycC\s+%E private String sFilePath; //Saved File's Path DRRy5+,I private String sFileName; //Saved File's Name }9Q<<a private int nSplitter; //Count of Splited Downloading File &hWYw+yH\ |KSoS#Y oCKn public SiteInfoBean() +@do<2l] {//nSplitter的缺省值为5 `Tr !Gj_ //default value of nSplitter is 5 %.:]4jhk this("","","",5); iP?lP= M } 7V"Jfh4_
H$,wg!kY! NH,4>mV$! public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) %D ,(S-Uj { 1Nz#,IdQ sSiteURL= sURL; $
\ I|6[P sFilePath = sPath; i>=y3x" sFileName = sName; x`K"1E{2 this.nSplitter = nSpiltter; '~x jaa;. u}jC$T>2%6 |+1k7S, } I.1(qbPkF+ &qm:36Y7Xg Eq5X/Hx public String getSSiteURL() 0}\8,U { k[1w] l8 return sSiteURL; ItG|{Bo } n&E/{o( eM^Y "gXvnl public void setSSiteURL(String value) #aadnbf { bFfDaO<k sSiteURL = value; V|;os } D ~NWP%H ASr3P5/ x'
3kHw public String getSFilePath() %;O# y3, { M:%Ll3 return sFilePath; XE;aJ'kt } rTeADu_vf "':SWKuMx (U*Zz+ R public void setSFilePath(String value) oN(F$Nvk { ;!<@Fm9W sFilePath = value; ^;cJjl'= } (9+N_dLx~P r6e!";w:U ZRC7j?ui8` public String getSFileName() eie u|_ { 3\5I4#S return sFileName; }ct*<zj[~u } XKbTjR 5:l"* dg;E,'e_
p public void setSFileName(String value) P~@I`r567 { 'WoB\y569 sFileName = value; P1"g62R } 9~}8?kPNw= /O$)m[ NqN9 public int getNSplitter() #s-li b { OLDEB.@ return nSplitter; bpfSe } ~#iAW@ w%f51Ex T`) uR*$ public void setNSplitter(int nCount) ~VJP:Y{[ { d6"B_,*b nSplitter = nCount; E>qe hs,g } Bzr}+J }
58/\ Y\{lQMCy 76S>xnN /* rXnG"A **Utility.java GC~N$!* */ ,CnUQx0 package NetFox; /Pa<I^-# \J^xpR_0u V;]U] public class Utility { 20mZ{_% jp-]];:aPJ .t{?doOT public Utility() .n)0@X! { %gXNWxv Q9
RCN<! c]:@y"W5$ } IV$2`)[A&X axd9b, //线程睡眠 ps=QVX)YP public static void sleep(int nSecond) g?!;04 { 7R".$ p try{ Mer\W6e"e Thread.sleep(nSecond); pPZ^T5-ks } /4u:5G catch(Exception e) 8\8%FSrc { hin6cac e.printStackTrace (); p:8]jD@}% } kA&ul } h3kBNBI ) P+;@?ofB //日志 =v/x&,Uj@6 public static void log(String sMsg) M.}QXta { .s<tQU System.err.println(sMsg); 74*iF'f?c } "_/5{Nc$ hdee]qLS vghn+P8 public static void log(int sMsg) w^QqYUL${ { |)u|@\{ System.err.println(sMsg); Q@#Gm9m } G3t
4$3| } 0B~Q.tyP @7<m.?A! >eaK@u-'0 /* V3}$vKQ **TestMethod.java =6+j
Po{F */ N_>}UhZ package NetFox; 1oIu~f{` wenJ (0L| %uhhQ<zs% public class TestMethod { RlTVx: )ur&Mnmm Q Ph6
p3bg public TestMethod() MBH/,Yd { ///xx/weblogic60b2_win.exe &b&o];a try{ y2Z1B2E%f SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 5Ai$1'*p //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); J'y*>dW SiteFileFetch fileFetch = new SiteFileFetch(bean); H[8P]"*z*i fileFetch.start(); 1_.#'U> } MOW {g\{\ catch(Exception e){e.printStackTrace ();} YJ^TO\4WM @Ao E> jj 9eFB } "t"&6\ >zAI#N4 Vl+,OBy public static void main(String[] args) cZXra(AD { !4G<&hvb new TestMethod(); H=k*;' } v;@-bED(Qs } ;]^JUmxU[d 点击下载更多相关资料
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