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/* s1,kTde **SiteFileFetch.java 7%p[n;-o& */ i
! wzID package NetFox; =^.f) import java.io.*; nSH
A,c import java.net.*; > QwZt p fj%AP: d*%-r2K public class SiteFileFetch extends Thread { F$kLft[: TGnyN'P| #q{i<E 07 SiteInfoBean siteInfoBean = null; //文件信息Bean Dp:u!tdbeg long[] nStartPos; //开始位置 =}S*]Me5 long[] nEndPos; //结束位置 O.7Q*^_ FileSplitterFetch[] fileSplitterFetch; //子线程对象 8'=8!V long nFileLength; //文件长度 @Q:5{? boolean bFirst = true; //是否第一次取文件 NTRw:' boolean bStop = false; //停止标志 SB#YV
File tmpFile; //文件下载的临时信息 0-
GA,I_ DataOutputStream output; //输出到文件的输出流 .r9-^01mG :tP:X+?O //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ],ow@} public SiteFileFetch(SiteInfoBean bean) throws IOException ,BM6s,\ { \~H;Wt5 siteInfoBean = bean; 3VJoH4E!6 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); i2or/(u` tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ]?P9M<0PM if(tmpFile.exists ()) x)6yWr[ri% { QJFx/zU bFirst = false; 6&(gp(F read_nPos(); hJ8|KPgdw } Vq`i.>%5 else "65@8xt== { MpbH!2J nStartPos = new long[bean.getNSplitter()]; .pNPC|XU nEndPos = new long[bean.getNSplitter()]; Xrnxpp!#^D } iE}jilU
S5:`fo^5 {e,m<mAi >SJ#
rZ } &(!Sy?tNe <fX]`57Dc` }{*((@GY} public void run() g`KVF"8 { Lu&2^USTO //获得文件长度 ^FSUK //分割文件 ]JQk,<l5E //实例FileSplitterFetch Zf<M14iM //启动FileSplitterFetch线程 ~__]E53F //等待子线程返回 y6KI.LWR9 try{ ]Xcqf9k if(bFirst) \m!swYy { y}jX/Ln nFileLength = getFileSize(); Va"_.8n|+ if(nFileLength == -1) M 7j0&>NTG { zuOx@T^ System.err.println("File Length is not known!"); 5q[0;`J } q_Td!?2? else if(nFileLength == -2) 2Up1
FFRx { aK'`yuN System.err.println("File is not access!"); }?B=R#5 } \nV|Y=5 else t5h]]TOz { [ 'pk/h for(int i=0;i<nStartPos.length;i++) X<s']C9c { 2-821Sf#h nStartPos = (long)(i*(nFileLength/nStartPos.length)); \(_FGa4j } <Vp7G%"'W for(int i=0;i<nEndPos.length-1;i++) jqHg'Fq { X#mm
Z;P nEndPos = nStartPos[i+1]; Sc
"J5^ } H`4H(KWm nEndPos[nEndPos.length-1] = nFileLength; Xz5 aTJ& } gP.Q_/V } uV<I!jyI 2U,O
e9 gkS#=bv9e@ //启动子线程 | ]`gps fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; r@+IDW.=9 for(int i=0;i<nStartPos.length;i++) uAT01ZEm { ,)A^ 3Q* fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Fz7(Kuc siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), [X:mmM0gd nStartPos,nEndPos,i); FKflN Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yn<z!z%mz fileSplitterFetch.start(); H<|I&nV } P8.tl"q // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), iZ+\vO?| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); "|pNS) // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", UM%[UyYQ nEndPos = " + nFileLength); ,-Fhb~u // fileSplitterFetch[nPos.length-1].start(); i> Ssp #=R) s0j" <Ft6d //等待子线程结束 ^GdU$%aa //int count = 0; ann!"s_ //是否结束while循环 y'4H8M2? boolean breakWhile = false; ^\ &:'$f+8 ]H7_bix j.4oYxK!s/ while(!bStop) cA ;'~[ { W?{:HV write_nPos(); pRmnS;*z& Utility.sleep(500); Lys4l$J] breakWhile = true; Kg&{
?& y|b|_eE?{ HGmgQ>q@M$ for(int i=0;i<nStartPos.length;i++) F?'=iY<h { zmy94Y5PE if(!fileSplitterFetch.bDownOver) M*| y&XBe { L f[>U breakWhile = false; sChMIbq!Av break; l(9$s4R } cH6ie?KvAo } jJl6H~
"q if(breakWhile) 9BB<.
p break; hi,! Y-&r_s_~ ,s0 E]]( //count++; Fa^5.p //if(count>4) i](,s. // siteStop(); cs`/^2Vf"# } Y."ujo #bB i7 `dY{p7 R3F>"(P@tS System.err.println("文件下载结束!"); j~V@0z. } w.J[3m/ catch(Exception e){e.printStackTrace ();} (utm+*V, } hu\HK81m bJe*J\){ <5/r //获得文件长度 h{.KPK\ public long getFileSize() OlhfBu)~ { PRl\W:_t int nFileLength = -1; +O3zeL try{ joDnjz= URL url = new URL(siteInfoBean.getSSiteURL()); 6cSMKbgZJ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @lAOi1m,, httpConnection.setRequestProperty("User-Agent","NetFox"); b].:2 H[V^wyi'z v vlfL*f int responseCode=httpConnection.getResponseCode(); {6)fZpd)@ if(responseCode>=400) S5d:?^PGg { RH ow%2D processErrorCode(responseCode); )H$Ik)/N return -2; //-2 represent access is error sj2v*tFb } <Hhl=6op @``kt*+K+ y4)M,+O5 String sHeader; />q=qkdq0 aGNVqS%y _~_04p for(int i=1;;i++) NKLGbH { dra'1E //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ];6c/#2x //Utility.log(in.readLine()); rwFR5 sHeader=httpConnection.getHeaderFieldKey(i);
wRb%-s if(sHeader!=null) 7CUu:6% { * 103 if(sHeader.equals("Content-Length")) zc]F { O/gok+K nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ~j3B' break; Yqmx] 7Y4 } Vj4
if@Z } $/],QD_;" else wQ!~c2a<8 break; ~wDmt } |K'{R'A } tu77Sb catch(IOException e){e.printStackTrace ();}
\8Mkb]QA catch(Exception e){e.printStackTrace ();} E xKH%I nFW^^v< vX)6N#D! Utility.log(nFileLength); MjE.pb EG&^;uU ^j'; 4' return nFileLength; l7aGo1TcIh } 66D<Up'K wc)[r~On(5 {b^naE //保存下载信息(文件指针位置) [ar:zlV8 private void write_nPos() xj{X#[q): { "Na9Xea try{ v6oPAqj,r output = new DataOutputStream(new FileOutputStream(tmpFile)); riZFcVsB output.writeInt(nStartPos.length); :tdx: for(int i=0;i<nStartPos.length;i++) VbM5]UT/ { ]~8bh*,= // output.writeLong(nPos); >?'q P ] output.writeLong(fileSplitterFetch.nStartPos); zJI/j
_~W output.writeLong(fileSplitterFetch.nEndPos); ,.]e~O4R } WRh&4[G' output.close(); &[*_ - } #"ayq,GC< catch(IOException e){e.printStackTrace ();} |/arxb& catch(Exception e){e.printStackTrace ();} A/{pG#if]3 } 8 jqt=}b 2P$l XGjh 5YC56,X //读取保存的下载信息(文件指针位置) ce2d)FG}e private void read_nPos() FO_nS { ,p1 (0i try{ & /-@R| DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); .`Z{ptt> int nCount = input.readInt(); FvG9PPd nStartPos = new long[nCount]; "x9xJ nEndPos = new long[nCount]; l4U& CA y for(int i=0;i<nStartPos.length;i++) $2]1 3j { Ou2H~3^PL nStartPos = input.readLong(); BGOI$, nEndPos = input.readLong(); Rt7}e09HV } X]cB`?vR input.close(); Lj *FKP\{ } ol!o8M%Q catch(IOException e){e.printStackTrace ();} KblOP{I catch(Exception e){e.printStackTrace ();} {tOuKnnS } J}jK_ FPaj
p -J[zJ4z# private void processErrorCode(int nErrorCode) *^Zt5 zk { t8i"f L System.err.println("Error Code : " + nErrorCode); C>v } k%hD<_:p E|97zc ~(aq3ngo. //停止文件下载 ejgg.G ^ public void siteStop() &M>S$+I
n { e7,iO#@:m bStop = true; yel>-=Vn for(int i=0;i<nStartPos.length;i++) CSr{MF`]e fileSplitterFetch.splitterStop(); ,EZ&n[%Ko %T'?7^\> *Z{$0K } 1"/V?ArfL } /lr RbZ //负责部分文件的抓取 KG>.7xVWV7 **FileSplitterFetch.java + W@r p# */ Z6D4VZVF package NetFox; <g*rTqT' =v:_N.Fh-c Ub3,x~V import java.io.*; Jk{>*jYk` import java.net.*; 3BY/&'oX q/;mxq$ Lj~lfO public class FileSplitterFetch extends Thread { .&sguAyG E*(Q'p9C *uEU9fX String sURL; //File URL S
BFhC long nStartPos; //File Snippet Start Position `b\4h/~ long nEndPos; //File Snippet End Position ^iV@NVP int nThreadID; //Thread's ID z7<^aS boolean bDownOver = false; //Downing is over N->;q^ boolean bStop = false; //Stop identical 'Fonn FileAccessI fileAccessI = null; //File Access interface %i.|bIhmm WZm^:, 5@0c@Q public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException uFok'3!g7% { HhqqJEp0 this.sURL = sURL; DVB:8"Bu this.nStartPos = nStart; dtF6IdAf this.nEndPos = nEnd; @%#(Hse nThreadID = id; dH`a|SVW9 fileAccessI = new FileAccessI(sName,nStartPos);//定位 >,] #~d } ]6:5<NW >p<(CVX[ hA@X;Mh^w public void run() @W.`'b- { 66|lQE&n while(nStartPos < nEndPos && !bStop) M
j5C0P( { ZzKn,+ vo::y" {#[a4@B0 try{ e<p$Op URL url = new URL(sURL); _Jp_TvP> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); qHKZ5w httpConnection.setRequestProperty("User-Agent","NetFox"); BKDWd]KEf String sProperty = "bytes="+nStartPos+"-"; 92SB'T> httpConnection.setRequestProperty("RANGE",sProperty); ;JZXSM-3 Utility.log(sProperty); {xH
\!!"T Q1jyetk~I s]I],>}RU InputStream input = httpConnection.getInputStream(); F;b|A`M //logResponseHead(httpConnection); mdZELRu 78.sf{I Y4{`?UM&h byte[] b = new byte[1024]; VtKN{sSnu int nRead; #zy%B while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 0)P18n"$ { C$tSsw?A nStartPos += fileAccessI.write(b,0,nRead); :EO}uP2 //if(nThreadID == 1) r!M2H{ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); TgUQD(d^ } FdSa Ood8 w(G(Q>GI ALwuw^+ Utility.log("Thread " + nThreadID + " is over!"); @i`gR% bDownOver = true; w+MdQ@'5 //nPos = fileAccessI.write (b,0,nRead); }`MO}Pz } o?b%L catch(Exception e){e.printStackTrace ();} ;T_9;RU<'b } AH7k|6ku<* } fg1y@Dj/& p/:5bvA S1+#qs{5a //打印回应的头信息 .Gv~e!a8 public void logResponseHead(HttpURLConnection con) Ym6ec|9; { (8*lLZ for(int i=1;;i++) D~y]d { <N*>9S,} String header=con.getHeaderFieldKey(i); asF-mf;D if(header!=null) <G&v //responseHeaders.put(header,httpConnection.getHeaderField(header)); _4W#6! Utility.log(header+" : "+con.getHeaderField(header)); srSTQ\l4 else T9$U./69-L break; <VBw1|)$@ } : 1{j&$ } "/"qg
;CvGIp&y {Q-U=me\ public void splitterStop() =aekY;/ { [_0g^(` bStop = true; j~{2fd<> } i f"v4PHq a2 SQ:d yjr@v!o } m3WV<Cbz w\mF2h N<{`n; /* N\fT6#5B **FileAccess.java 4sAshrUf *//文件访问(定位,写) |")x1'M package NetFox; `u}x:f ! import java.io.*; em]K7B= s6D-?G*u%8 m7"f6zSo( public class FileAccessI implements Serializable{ c`+ITNV 47 RY pd //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 q>[% C5 RandomAccessFile oSavedFile; br;G5^j3? long nPos; |W <:rT /Ow?nWSt k$c
j|-< public FileAccessI() throws IOException 'l:2R,cP { J4vKfxEg this("",0); !BX62j\? } c|R/,/ jQb D2x6( 9PJDT] public FileAccessI(String sName,long nPos) throws IOException Z C93C7lJ { cOb%SC[A{ oSavedFile = new RandomAccessFile(sName,"rw"); mQs$7t[>t this.nPos = nPos; [z~Nw# oSavedFile.seek(nPos); zFn&~lFB } `@M4THt Wa(S20yF ]'Yw#YB public synchronized int write(byte[] b,int nStart,int nLen) R
u5&xIQ { X{
=[q|P int n = -1; Ic}ofBK try{ /)1-^ju oSavedFile.write(b,nStart,nLen); TJpv"V n = nLen; K5>:WiY } @QG1\W' catch(IOException e) `k&K"jA7$ { l:eN u}{& e.printStackTrace (); C6w{"[Wv=X } f
99PwE(= <<6w9wNon cnthtv+(~ return n; 9ojhI=: } gcxk'd dmz3O(]$ YZl%JX } %?hLo8 6W=:`14 "^z=r]<5
/* 2[po~}2-0 **SiteInfoBean.java _|ib@Xbin */ QNXxpoS# package NetFox; 8~E)gV+v ;#9|l= MPbPq3an public class SiteInfoBean { (OB8vTRXP r6JkoPMh pXv[]v private String sSiteURL; //Site's URL >e;STU private String sFilePath; //Saved File's Path Jt6J'MOq private String sFileName; //Saved File's Name bFezTl{M private int nSplitter; //Count of Splited Downloading File 5V~p@vCx A=UIN! Fz&ilB public SiteInfoBean() 0@lC5-= {//nSplitter的缺省值为5 &|}IBu :T //default value of nSplitter is 5 ]?(F'& this("","","",5); io7U[ # } C-u/{CP Ok&>[qu HY;?z`= public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) %uVJLz { Lc<xgN+cJ sSiteURL= sURL; /dt!J
`: sFilePath = sPath; L59oh sFileName = sName; 2?iOB6 this.nSplitter = nSpiltter; _M[[vXH WgJAr73
l ZT8Ji?_n } wp.e3l 9}cuAVI /}`/i(k public String getSSiteURL() Gr$*t,ZW { h5rP]dbhXU return sSiteURL; VhFRh,J(T } =veOVv[Q&/ noNF;zT AH'4H."o/9 public void setSSiteURL(String value) A}bHfn| { =8p+-8M[d sSiteURL = value; ASZ5;N4u } KM}4^Qc )]>G,.9C} QYfAf3te public String getSFilePath() ~}-p5 q2 { uuYH6bw*d return sFilePath; #r.` V!= } #oJbrh9J6 yF5 ht3T{4qCS public void setSFilePath(String value) B9IXa; { (GEi<\16[ sFilePath = value; -*hb^MvP } R``VQ 9LO.8Jy }
ndvV~*1 public String getSFileName() K=Z]#bm { 0*Km}?;0- return sFileName; `bZU&A(`Be } E)Qh]:<2v %Mng8r `)=A!x y public void setSFileName(String value) f:[d]J| { w}W@M,.^ sFileName = value; &O6;nJEI } .aismc`= y|;8 :b32 ?FV7|)f public int getNSplitter() dD^_^'i { j&[.2PW\ return nSplitter; u1)TG"+0 } W]D`f8r9 {nPkb5xbW u@bOEcxK public void setNSplitter(int nCount) VUy)4* { w
<#*O: nSplitter = nCount; ECS<l*i57& } ,/?%y\:J } "T{~,'T adO!Gs9f? I,<>%Z|' /* \'?? **Utility.java Ztyv@z'/Z */ qBBYckS. package NetFox; I#S~ !q-:rW?c 762o~vY6$ public class Utility { yxC Ml. n4vXm k>:/D public Utility() nI*(a: { t ?9;cS4 53`9^|: 9xK4!~5V } qX
p,d Tw`c6^%^y //线程睡眠 oDW<e'Jm public static void sleep(int nSecond) I(^jOgYU { d4p{5F7]^ try{ ^A11h6I Thread.sleep(nSecond); u+z .J4w } `rz`3:ZH catch(Exception e) CRc!|? { xH"W}-#[ e.printStackTrace (); ?GUz?'d } Ez/\bE } N&I8nZ9 S2'`|uI //日志 vJTfo#C| public static void log(String sMsg) c#{Ywh { ~mXZfG/D System.err.println(sMsg); l:zU_J6 } .#= j
<& x2j/8]'o (o x4K{ public static void log(int sMsg) 2vqmsl? { %A)-m 69 System.err.println(sMsg); oh7#cFZZ0 } nr<WO~Xw~ } {?EEIfg y:g7'+c + ZR( /* ^MW\t4pZ **TestMethod.java ,bZ"8Z"lss */ +CnyK(V package NetFox; _HWHQF7 HA^jk%53 U^M@um M public class TestMethod { E8T"{
R80 !j!Z%]7 e9~cBG| public TestMethod() ~K5Cr { ///xx/weblogic60b2_win.exe r{K\(UT]! try{ Bs+c2R SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); F5N>Uqr*oN //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); v!<PDw2' SiteFileFetch fileFetch = new SiteFileFetch(bean); hmK8jl<6 fileFetch.start(); j+_S$T8w } \6`v.B&v catch(Exception e){e.printStackTrace ();} 2
) TG $ZQlIJZ j~,h)C/v } GB&Nt{ 4R&*&GZ# l `fW{lh public static void main(String[] args) <@u0.-] { uz*d^gr} new TestMethod(); 7*zB*"B'1t } qTyg~]e9( } KK:N [x 点击下载更多相关资料
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