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/* 0Ui_Trlc **SiteFileFetch.java jQ%1lQ#R) */ <PuY"-`/Oc package NetFox; Q<;EQb# import java.io.*; 'PY; import java.net.*; ?QJx!'Y,p gT$WG$^i FK~wr;[ public class SiteFileFetch extends Thread { rOt{bh6r b+J|yM<` z _\L@b SiteInfoBean siteInfoBean = null; //文件信息Bean (@xC-* long[] nStartPos; //开始位置 ?hc=w 2Ci long[] nEndPos; //结束位置 vfv?QjR FileSplitterFetch[] fileSplitterFetch; //子线程对象 ~/-SKGzo- long nFileLength; //文件长度 ;nW;M 4{ boolean bFirst = true; //是否第一次取文件 R3lZ|rxv: boolean bStop = false; //停止标志 JQ0Z%;" File tmpFile; //文件下载的临时信息 LTo!DUi` DataOutputStream output; //输出到文件的输出流 U+ik& R# xt pY* //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 1v.#ndk public SiteFileFetch(SiteInfoBean bean) throws IOException YtSYe% { 2\k!DF siteInfoBean = bean; \y=28KKc:c //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); zNrn|(Y%Y tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Q5Nbu90 if(tmpFile.exists ()) 3!gz^[!?EN { #t(/wa4 bFirst = false; JU^Y27 read_nPos(); VV/T)qEe7> } /4pYhJ8S else
lqL5V"2Y { ArAe=m!u nStartPos = new long[bean.getNSplitter()]; JvW7h(u7g nEndPos = new long[bean.getNSplitter()]; #xu1
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A XdV>6<gf{
36+/MvIT public void run() E Zf|>^N { e4Y+u8gT //获得文件长度 Bl6I@w //分割文件 )rj!/% //实例FileSplitterFetch [u K,.G //启动FileSplitterFetch线程 [9Rh" H;h //等待子线程返回 Y_ne?/sZE try{ t855| if(bFirst) VgYy7\?p { iZdl0;16[ nFileLength = getFileSize(); YB4
ZI if(nFileLength == -1)
gvo98Id { Ji!i}UjD7! System.err.println("File Length is not known!"); (EWGX |QA } eF{uWus else if(nFileLength == -2) ZZ^A&%E(a { E8sM`2z5 System.err.println("File is not access!"); ~Uv#) } ;ZI8vFb else n5A|Zjk; { Vfy@?x=
& for(int i=0;i<nStartPos.length;i++) gE@Pb { &0Y
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nStartPos = (long)(i*(nFileLength/nStartPos.length)); Eb9h9sjv } ;k#_/c for(int i=0;i<nEndPos.length-1;i++) ",gVo\^ { 7lwI]/ZH* nEndPos = nStartPos[i+1]; V*te8HIe } iH-,l nEndPos[nEndPos.length-1] = nFileLength; LXby(|<j } <#M1I!R } k CGb~+ ^znUf4N1 420K6[ //启动子线程 Pz2Q]}(w fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; jA:'P~`Hj for(int i=0;i<nStartPos.length;i++) CXoiA"P { 6vNn;-gg. fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3
I%N4K4 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), DUu:et&c1 nStartPos,nEndPos,i); B!quj!A Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); zJ8T.+qJ fileSplitterFetch.start(); Z P|k3
} 3)=ix. wW // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), H'!OEZ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); F^Jz
// Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", *(r9c(x a nEndPos = " + nFileLength); 7)#JrpTj% // fileSplitterFetch[nPos.length-1].start(); 5D7 L)> }eZ\~2 r 56~s5A //等待子线程结束 9$X" D //int count = 0; &${| o@ //是否结束while循环 T^7}Qs9 boolean breakWhile = false; h2mHbe43 >+i+_^] 5 8;OTDR! while(!bStop) "\;n t5L { *<
fJgc"3 write_nPos(); kP('X/ Utility.sleep(500); 4PS| breakWhile = true; &DYC3*)Jih l>
H'PP~ k-^^Ao*@ for(int i=0;i<nStartPos.length;i++) [=cbzmX[ { yCkc3s|DA; if(!fileSplitterFetch.bDownOver) oM@%2M_O( { a[zVC)N0 breakWhile = false; Txe*$T,( break; kl1Q: } SufM~9Ll } jb/C\2U4) if(breakWhile) X5+^b({ break; !JDuVqW qPDRB.K|} d?YSVmG //count++; 751Qi //if(count>4) UL~~J[1r // siteStop(); nZNS}|6 } tNZZCdB <Mo{o2F= 8VG~n?y System.err.println("文件下载结束!"); ~LFM,@ } L*6<h catch(Exception e){e.printStackTrace ();} ^P [#YO } A`(Cuw-o O<>+l*bk .pl,ujv //获得文件长度 @*6_Rp"@ public long getFileSize() o^d|/; { }NV<k int nFileLength = -1; zU0JwZi try{ SV95g@ URL url = new URL(siteInfoBean.getSSiteURL()); Um`KmM3 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ik5-ooZ&{ httpConnection.setRequestProperty("User-Agent","NetFox"); a.O"I3{?h (<OmYnm T51oNO%^ int responseCode=httpConnection.getResponseCode(); I-J%yutB if(responseCode>=400) ?0z/i^I { M,{; xf processErrorCode(responseCode); 0$yHO2 f return -2; //-2 represent access is error Ae^4 } =7: }/& hlc g[Qdo* fyx Q{J String sHeader; NX;{L#lQ BjjuZN& SZ4@GK for(int i=1;;i++) Ut1s~b1 { MD4mh2 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ]5ibg"{S //Utility.log(in.readLine()); T# tFzbr sHeader=httpConnection.getHeaderFieldKey(i); /d}5R@Oy if(sHeader!=null) hOIg7=v { Rdd9JJsVd if(sHeader.equals("Content-Length")) [%Dh0hOg { Bz:Hp{7& nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); d|UH AX break; 8)` } b-c6.aKf| } h"2^`
)!u else JiA1yt break; \
sz ](X } s1%2({wP } [P)](8nR[ catch(IOException e){e.printStackTrace ();} 5*B'e{C catch(Exception e){e.printStackTrace ();} ^ 6t"A Cf<TDjU`| xw1,Wbu] Utility.log(nFileLength); "4*QA0As cZWW[i 4l/~::y return nFileLength; .Z 17X_ } +@@( C9 5':j=KQE_ h=NXU9n%' //保存下载信息(文件指针位置) 4dSAGLpp private void write_nPos() 6,R<8a;Wn { >Ij#+= try{ l,b_'
m@ output = new DataOutputStream(new FileOutputStream(tmpFile)); t#]VR7] output.writeInt(nStartPos.length); +$^[r for(int i=0;i<nStartPos.length;i++) [R~@#I P! { Fk`6
q // output.writeLong(nPos); :}v:=c k output.writeLong(fileSplitterFetch.nStartPos); c Ct5m output.writeLong(fileSplitterFetch.nEndPos); "(+aWvb } GsqO^SV output.close(); $VxuaOTyVZ } ]HG>Og catch(IOException e){e.printStackTrace ();} MAc/ T.[ catch(Exception e){e.printStackTrace ();} ~~ty9;KYL } ^M1O) xkaed 7tY~8gQel //读取保存的下载信息(文件指针位置) itO1ROmu private void read_nPos() sQT,@+JEr { %Si3LQf try{ Q6[h;lzGV DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); K~8!Gh{h] int nCount = input.readInt(); 1<M~# nStartPos = new long[nCount]; MY&?*pV) nEndPos = new long[nCount]; z7*mT}Q for(int i=0;i<nStartPos.length;i++) \]L ha { ,#.^2O9-^ nStartPos = input.readLong(); 3ZYrNul" nEndPos = input.readLong(); rV
I-Yb } m{6*ae input.close(); /-3)^R2H } .Ag)/Xm(? catch(IOException e){e.printStackTrace ();} Vf(n catch(Exception e){e.printStackTrace ();} @d[)i,d:G } XToYtdt2 Pv8AWQQJ ^DR`!.ttr private void processErrorCode(int nErrorCode) D4+OWbf6 { [rhK2fr:i System.err.println("Error Code : " + nErrorCode); vRO`hGH } V4%7Xj 4-xg+*() Cz4l //停止文件下载 M""X_~&I" public void siteStop() 79M`?xm { y;LZX-Z- bStop = true; ?kc,}/4 for(int i=0;i<nStartPos.length;i++) A^ry|4`3( fileSplitterFetch.splitterStop(); VDv>I 2% m] IN-' xx%*85 < } gf|&u4D } 3],[6%w //负责部分文件的抓取 2FTJxSC **FileSplitterFetch.java $D#eD. */ )$FwB6^ package NetFox; gO!:WD *wz6 2p #!M;4~Sfx import java.io.*; fAeq(tI= import java.net.*; mz .uK2l{
ob=IaZ@? 9KZLlEk5O public class FileSplitterFetch extends Thread { g*:f#u5 e&="5.ik _&F*4t!n_ String sURL; //File URL 6q^.Pg-Y long nStartPos; //File Snippet Start Position If. hA} long nEndPos; //File Snippet End Position cz*Z/5XH int nThreadID; //Thread's ID WAh{*$Rpl boolean bDownOver = false; //Downing is over *s"{JrG`O boolean bStop = false; //Stop identical <F5x}i~(C FileAccessI fileAccessI = null; //File Access interface [6a&9#[A k%ckV`y QPwUW public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException rIF6^? { *ps")?tlC this.sURL = sURL; s$OnQc2/ this.nStartPos = nStart; \Ot,&Z k2 this.nEndPos = nEnd; p< jM%fbZk nThreadID = id; ais"xm<V fileAccessI = new FileAccessI(sName,nStartPos);//定位 [,p[%Dza } {= l9{K`~ 09rbu\h yi3Cd@t({{ public void run() h{M.+I$}C { e?!A]2 while(nStartPos < nEndPos && !bStop) 9.$k^|~ { XhJbBVS| /*{s1Zcb |<1 try{
WJ$!W URL url = new URL(sURL); ukRbSJ5a5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "EC,#$e%ev httpConnection.setRequestProperty("User-Agent","NetFox"); rQPV@J]: String sProperty = "bytes="+nStartPos+"-"; djtCv;z httpConnection.setRequestProperty("RANGE",sProperty); F:rT.n Utility.log(sProperty); c4n]#((%a ?i7}d@636 YXhxzH hPd InputStream input = httpConnection.getInputStream(); PWThm ooP //logResponseHead(httpConnection); iOzY8M+N( L+y90 T6? Ce1^S[ byte[] b = new byte[1024]; yGtGhP8 int nRead; =;^#5dpt$ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Zo|# ,AdE> { 3 ]}wZY0 nStartPos += fileAccessI.write(b,0,nRead); Kr|9??`0E //if(nThreadID == 1) Zb=H\#T // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Vi1=
E]) } 3]1uDgfr WfE,U=e* I='S). Utility.log("Thread " + nThreadID + " is over!"); |/-H:\5 bDownOver = true; zDO`w0N //nPos = fileAccessI.write (b,0,nRead); Wr Nm:N } +\n8##oAI catch(Exception e){e.printStackTrace ();} d' Z } 7R`:^}'> } fPW(hb; &c)n\x* _+hf.["" //打印回应的头信息 (:]on^| public void logResponseHead(HttpURLConnection con) jN43vHm\Y9 { 7Z+4F=2ff for(int i=1;;i++) m.A_u7D@ { +WYXj String header=con.getHeaderFieldKey(i); [vs5e3B) if(header!=null) `Al( AT(p //responseHeaders.put(header,httpConnection.getHeaderField(header)); 0R%R2p'wG Utility.log(header+" : "+con.getHeaderField(header)); "eiZZSz else %;|^*?!J0 break; B&E qd } h{&}p-X&[ } qZ6Mk9@M MjW g 8QN#PaY public void splitterStop() =)GhrWeVi4 { m:,S1V_jl bStop = true; t
Tky } ErNL^Se1 |i7j}i b xT| } IP E2t #PpmR_IX 2.zx /* QFm~wv8: **FileAccess.java q;p:)Q" *//文件访问(定位,写) VnB"0"%w package NetFox; b]Xc5Dp{ import java.io.*; ,dM}B- 7]w]i5 pLvvv#Y public class FileAccessI implements Serializable{ `|\z#Et ;LM,<QJ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 7LM?<lp] RandomAccessFile oSavedFile; `$*cW1 long nPos; h`0'27\C ySLa4DQf :eIu<_,} public FileAccessI() throws IOException %\5d?; { {uQp$` this("",0); i,DnXgmz@ } k<098F D.hj9 al9L+ruR public FileAccessI(String sName,long nPos) throws IOException B1GBQH$Ms { GoK[tjb oSavedFile = new RandomAccessFile(sName,"rw"); ]YP J.[n this.nPos = nPos; O|opNr oSavedFile.seek(nPos); M7|k"izv } i1"4ztZ Vu3;U j`GL#J[wqQ public synchronized int write(byte[] b,int nStart,int nLen) &"(xd@V)]A { u!FX 0Ip int n = -1; 2aef[TY try{ Ov$_Phm: oSavedFile.write(b,nStart,nLen); lC8DhRd0_ n = nLen; 6^M!p4$hF } 2cy: l03 catch(IOException e) s%K9;(RWI { }i7Gv K<[: e.printStackTrace (); y my/`% } z3V[
Vi "w#jC~J<W &jh'B , return n; &QaFX,N" } Cx.GEY|0 A.@S>H'P
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4 } 'gDhi!h% gq|T: dD
Qx[ /* LZirw' **SiteInfoBean.java YY\$lM */ [ &cCE package NetFox; WJp9io[GM 2m]CmdV^ 9"5J-a' public class SiteInfoBean { &R? \q*
}pOem} 1'O++j_%y private String sSiteURL; //Site's URL T)ZO+} private String sFilePath; //Saved File's Path sYQ=nL private String sFileName; //Saved File's Name u|v2J/_5Y private int nSplitter; //Count of Splited Downloading File Ifghyh<d
Rt
&Oz!TQ E;Akm': public SiteInfoBean() zGfF.q} {//nSplitter的缺省值为5 ^W&qTSjh //default value of nSplitter is 5 9~
[Sio~ this("","","",5); >}& :y{z~ } 3ZZ"mlk* 'jr\F2 'G6g
yO/K public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) I\%a< { S?ypka"L sSiteURL= sURL; '&XL|_Iq sFilePath = sPath; w}wABO sFileName = sName; Y8c#"vm( this.nSplitter = nSpiltter; WInfn f+' :qfP>Ok UMcQqV+vT } 8F?6Aq1B pX5#!) %XX(x'^4 public String getSSiteURL() ~N<zv({lG { 5crd.1@^ return sSiteURL; 0X.(BRI~6p } eXB'>#&s ?AMn>v ?X'm>R. @ public void setSSiteURL(String value) 2pKkg>/S { G?p !*7N sSiteURL = value; p_^Jr*Mv } =;hz,+ ?pE)K<+Zkf g4Y1*`}2f public String getSFilePath() m?Tv8-1 { C`4m# return sFilePath; %rU8^'Gu } ;\[n{<
_,,w>q6K ZDQc_{e{ public void setSFilePath(String value) |"j{!Ei { S.u1[Yz^ sFilePath = value; F$tshe( } Ol%KXq[ TBAF_$ | z1 public String getSFileName() I&m C { ~AqFLv/% return sFileName; [&Yrnkgr } IE^xk@ 'AU:[eyUV %5?Zjp+9 public void setSFileName(String value) /0.m|Th'm { A_:CGtv: sFileName = value; MmI[: } ECZ`I Z. $N; Nvp2 <$" public int getNSplitter()
U]o { zJ"`40V*; return nSplitter; U=kPxe } e7n[NVrX <8 $fo r]sNI[ public void setNSplitter(int nCount) d[0R#2y= { i[IOR0 nSplitter = nCount; E.Vlz^B } *Y:;fl +v } -o+<m4he jDWmI%Y. {IB}g: /* zs=[C+Z\ **Utility.java [>IV#6 $ */ '<Fr}Cn package NetFox; !_yWe e&R?9z-* S)?V;@p6 public class Utility { G!G]*p5 lG1\41ZxB y-.<iq public Utility() 5YZh e4R { Q\QSnMM&] *F^t)K2 wr) \GJ#> } iImy"$yX{ SsY:gp_ //线程睡眠 a3f-9LN public static void sleep(int nSecond) hw @)W { (D<_
iV try{ |ee A>z"I Thread.sleep(nSecond); J,W<vrKOcN } l_2B catch(Exception e) nT:F{2 M; { ^uV=|1<% e.printStackTrace (); ITt*TuS2c } ]jB`"to*} } z]49dCN I(5sKU3< //日志 B7 #O>a public static void log(String sMsg) Y\
C"3+I { qexnsL System.err.println(sMsg); _{
Np_(g } J4woZ{d +~7x+6E .7<6
zG6J public static void log(int sMsg) "Dt:
8Nf^ {
Q"Pl)Q\ System.err.println(sMsg); x@p1(V. } u]766<Z } ]YciLc( {0o,2]o!: YXlaE=9bn /* /a .XWfu **TestMethod.java v;WfcpWq2 */ {hH8+4c7 package NetFox; B>kVJK`X !r#36kO f;`7}7C public class TestMethod { 2Kmnt(> riu_^!"Z_ ~p!=w#/ public TestMethod() !^x;4@Ejm { ///xx/weblogic60b2_win.exe d(_;@%p1X try{ j9d^8)O, SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 03?7kAI //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); c!ul9Cw SiteFileFetch fileFetch = new SiteFileFetch(bean); 1G}\IK1+ fileFetch.start(); x,fX mgE } @TraEBJGL catch(Exception e){e.printStackTrace ();} j9r%OZw{ `gSJEq 2)\gIMt% } u$Wv*;TT% sLOkLz"x ?Z2_y- public static void main(String[] args) cl{kCSZo.z { IQ $/|b/ new TestMethod(); }? :T*CJ } g@Z7f y7 } T!2gOe 点击下载更多相关资料
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