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/* ZboJszNb; **SiteFileFetch.java u0hbM9U> */ U`_vF~el~ package NetFox; Ck%(G22- import java.io.*; D\*_ulc] import java.net.*; v+bjC I/V#[K C q0Lt[*q3R public class SiteFileFetch extends Thread { o (NyOC "Am0.c/ cB=u;$k@* SiteInfoBean siteInfoBean = null; //文件信息Bean 3CPOZZ long[] nStartPos; //开始位置 Ic!83- long[] nEndPos; //结束位置 2]*~1d FileSplitterFetch[] fileSplitterFetch; //子线程对象 'c{]#E1} long nFileLength; //文件长度 L;7mt
4H boolean bFirst = true; //是否第一次取文件 nKkTnTSa boolean bStop = false; //停止标志 c7!`d.{90 File tmpFile; //文件下载的临时信息 Cbvl( ( DataOutputStream output; //输出到文件的输出流
ts!aKx w=o m7%J@l //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) -\C6j public SiteFileFetch(SiteInfoBean bean) throws IOException [IA==B7 { :FpBz~!a siteInfoBean = bean; L([ >yQZ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); =,G(1# tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); A8(PI)Ic. if(tmpFile.exists ()) qk1D#1vl { &7u
Ra1/R bFirst = false; #h|< > read_nPos(); \ySc uT }
NX_S else >*xzSd?\ { ;FflEL<7Y nStartPos = new long[bean.getNSplitter()]; t3JPxg]0k' nEndPos = new long[bean.getNSplitter()]; 4!%LD(jB`B } Y!$z7K
oHnpw U ()
;7+ 6WM_V9Tidq } &uW.V+3 3h4"Rv=, )!-'S H public void run() o}Np}PE6 { &B7KWvAy //获得文件长度 mLA$F4/K //分割文件 YKd?)$J //实例FileSplitterFetch P32'`!/: //启动FileSplitterFetch线程 Y
@&nW //等待子线程返回 wVtBeZa try{ $Ws2g*i if(bFirst) #eyx { ITUl-L4xE nFileLength = getFileSize(); 7gaC)j& if(nFileLength == -1) .e#j#tQp { ?7a[|-
System.err.println("File Length is not known!"); !,uw./8@Ku } `Db}q^mQ else if(nFileLength == -2) zZiVBUmE< { dL)5~V8s System.err.println("File is not access!"); qrh7\`,.m/ } +t{FF!mL else OAOmd
4 { 0k<%l6Bq for(int i=0;i<nStartPos.length;i++) 0M -AIQ5 { [~S0b nStartPos = (long)(i*(nFileLength/nStartPos.length)); _lqAxWH } HX*U2<^ for(int i=0;i<nEndPos.length-1;i++) 3$;v# P$%N { o!S_j^p[C nEndPos = nStartPos[i+1]; _nq n| } }cmL{S nEndPos[nEndPos.length-1] = nFileLength; G[,VPC= } epm|pA* }
b6BIDuRb YO+d+5 42LV>X#i //启动子线程 6d8 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; SUhP
e+ for(int i=0;i<nStartPos.length;i++) tjt#VFq? { m#'9)%t!J fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), A79SAheX# siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), -E"o)1Pj6C nStartPos,nEndPos,i); c[q3O** Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6fyW6xv[, fileSplitterFetch.start(); ?GZs5CnS } HjD= .Q // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $y}Tbm siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ljmHX2p // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", '9XwUQx nEndPos = " + nFileLength); h,G$e|[? // fileSplitterFetch[nPos.length-1].start(); IYN`q'%| tWIhbt
Y7HWf //等待子线程结束 kfV}w, //int count = 0; '?t{-z, //是否结束while循环
t-/^ O boolean breakWhile = false; IRB;Q(Z
`0N/
/Q Gr?gHAT while(!bStop) _`58G#z { tnntHQ&b write_nPos(); 4V5*6O9(u Utility.sleep(500); 5Z{[.&x breakWhile = true; Ycm1 _z Dl6zl6q? 1|CO>)*D for(int i=0;i<nStartPos.length;i++) je\UfEo% { mi?Fy0\ if(!fileSplitterFetch.bDownOver) s!Vtwp9 { V,}cDT> breakWhile = false; i8F~$6C break; 1'U-n{fD } :+n7oOV } 5Jp>2d if(breakWhile) ?##GY;# break; oT w1w O"GzeEY7 ZN^Q!v //count++; EBm\rM8 //if(count>4) w *0T"hK // siteStop(); U*t`hn-xs } f,*e?9@;s y|ZJ-[qg ;Lx5r=<Hx System.err.println("文件下载结束!"); ;F5%X\t- } 6}0#({s:R catch(Exception e){e.printStackTrace ();} WqAP'x 1 } Bvwk6NBN 6|9fcIh]B ;(A'XA4
6N //获得文件长度 qabM@+m[ public long getFileSize() eZHi6v)i { <JlKtR&nSo int nFileLength = -1; fO+;%B try{ va)\uXW.N URL url = new URL(siteInfoBean.getSSiteURL()); ~2H)#`\ac8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Cv3H%g+as httpConnection.setRequestProperty("User-Agent","NetFox"); ZtiOf}@i\ &E~7ty' &fWZ%C7|jC int responseCode=httpConnection.getResponseCode(); 71eD~fNdx if(responseCode>=400) 8G=4{,(A { `YJ`?p processErrorCode(responseCode); );C !:? return -2; //-2 represent access is error b^ZrevM } :&]%E/ :
f Wh7X3 yl*S|= 8;k String sHeader; U i;o/Z3 4V=dD<3m h&XyMm9C for(int i=1;;i++) |Ia46YS { v^pE=f*/ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); h^4oy^9 //Utility.log(in.readLine()); ,Tpds ^ sHeader=httpConnection.getHeaderFieldKey(i); _-^@Jx[ if(sHeader!=null) {.sF&(e { zOcMc{w0 if(sHeader.equals("Content-Length")) h`)r :a7 { 7dLPy[8";t nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); NWf!c-': break; #nnP.t m } @|M10r9E } nt4> 9; else +IU]=qS break; $`i&\O2* } VFyt9:a } IV\@GM:ait catch(IOException e){e.printStackTrace ();} m{' q(w} catch(Exception e){e.printStackTrace ();} }b44^iL$9y I6UZ_H'E 15870xS Utility.log(nFileLength); ^rI&BN@S 6oC(09 C>LkU |[ return nFileLength; #3.\}d) } ms~ mg: V'_^g7}l& 4Hu.o 7 //保存下载信息(文件指针位置) ^0VI J)y private void write_nPos() 6(wpf^br2 { 1iz\8R:0 try{ 2o,%O91p output = new DataOutputStream(new FileOutputStream(tmpFile)); .NabK output.writeInt(nStartPos.length); U7Ps2~x3 for(int i=0;i<nStartPos.length;i++) :Y"f.> { 4ed(
DSN // output.writeLong(nPos); qsJo)SA output.writeLong(fileSplitterFetch.nStartPos); KzhldMJ^zq output.writeLong(fileSplitterFetch.nEndPos); @wB$qd;v } O,7P6 output.close(); #<)u%)` } EF}Z+7A catch(IOException e){e.printStackTrace ();} \wMr[_LW catch(Exception e){e.printStackTrace ();} H>VuUH| } gB?#T .
a~J.0co @]~\H-8 //读取保存的下载信息(文件指针位置) " #JRw private void read_nPos() Pocm. { DBOz<| try{ .@R{T3=Q DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); h:l\kr|9 int nCount = input.readInt(); 2;A].5>l nStartPos = new long[nCount]; Rj-<tR{ nEndPos = new long[nCount]; ]NN9FM.2b/ for(int i=0;i<nStartPos.length;i++) gXG1w> { C8i}~x< nStartPos = input.readLong(); s`&8tP nEndPos = input.readLong(); FFPO?y$ } T*z >A input.close(); 2@=JIMtc } a(bgPkPP catch(IOException e){e.printStackTrace ();} RXh/[t+ catch(Exception e){e.printStackTrace ();} bA1uh]oB } \4mw>8wA sz_|py?0 55fV\3F|R private void processErrorCode(int nErrorCode) .0nL;o { 'AHI;Z~Gk System.err.println("Error Code : " + nErrorCode); p9Ks=\yvL } 7`
&K=( . m"NZ; *d ' Qu!Lc:oM? //停止文件下载 nKch_Jb public void siteStop() 8LB+}N(8f { |eJ4"OPC bStop = true; lQldW|S> for(int i=0;i<nStartPos.length;i++) oC"c%e8 fileSplitterFetch.splitterStop(); *l^h;RSx <$_B J2Z 10{ZW@!7 } +:;r} 7Zh } GKSfr8US4 //负责部分文件的抓取 8 yQjB-,# **FileSplitterFetch.java 2BEF8o]Np */ 90&ld :97 package NetFox; )9,9yd~SI GAV|x]R Ydh]EO0' import java.io.*; 36e!je import java.net.*; hQvSh\p l$z\8]x cOq^}Ohan public class FileSplitterFetch extends Thread { _da>=^hFJ Kr!8H/Z pX+ `qxF\ String sURL; //File URL Y;4nIWe
JL long nStartPos; //File Snippet Start Position O:WFh;c long nEndPos; //File Snippet End Position fHdPav f,S int nThreadID; //Thread's ID )EcE{!H6+ boolean bDownOver = false; //Downing is over Ag^Cb'3X boolean bStop = false; //Stop identical _m#M^<0n FileAccessI fileAccessI = null; //File Access interface Yu`b[]W ng^`s}?o Z[s{ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException G ,An8GR%& { +2!F6"hP this.sURL = sURL; Tt<Ry'Z$3 this.nStartPos = nStart; :VX?j3qW this.nEndPos = nEnd; }hv>LL nThreadID = id; 22)2olU fileAccessI = new FileAccessI(sName,nStartPos);//定位 s`U.h^V } q0,Diouq *^ g7kCe( T]Pp\6ff public void run() IMpEp}7 { F_$eu-y while(nStartPos < nEndPos && !bStop) MPhO#;v { !O~EIz y4^6I$M7V <: f jWy try{ dnSjXyjFB URL url = new URL(sURL); a39Kl_\ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "WV]|
TS"] httpConnection.setRequestProperty("User-Agent","NetFox"); O|}97a^ String sProperty = "bytes="+nStartPos+"-"; 8(&Jy RT httpConnection.setRequestProperty("RANGE",sProperty); Tl6%z9rY@ Utility.log(sProperty); FhVi|Va "hdcB
0 !c(B c^ InputStream input = httpConnection.getInputStream();
3V>2N)3`A //logResponseHead(httpConnection); 9l5l"Wj& ^(r?k_i/ Yh\}
i byte[] b = new byte[1024]; |f#~#Y2v int nRead; CXwDG_e while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 6lpfk& { 7g^= nStartPos += fileAccessI.write(b,0,nRead); OQIQ //if(nThreadID == 1) bsO78a~=P // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Ii_X^)IL( } x >hnH{~w ep* ( %}t.+z(S Utility.log("Thread " + nThreadID + " is over!"); dcew`$SJp bDownOver = true; h(*!s`1 //nPos = fileAccessI.write (b,0,nRead); { AdPC?R` } :80!-F*\ catch(Exception e){e.printStackTrace ();} GdVq+,Ge } C(qqGK{ } uU=O 0?'zq x<W`2Du Y;JV9{j //打印回应的头信息 <iDqt5)N public void logResponseHead(HttpURLConnection con) jl YnV/ ] { `Hld#+R for(int i=1;;i++) O RAKg.49 { of!Bz String header=con.getHeaderFieldKey(i); Rrmk\7/ if(header!=null) {p@u H<) //responseHeaders.put(header,httpConnection.getHeaderField(header)); ve;#o< Utility.log(header+" : "+con.getHeaderField(header)); a/Z >- else }c?/-ab> break; #&a-m,Y$sx } 9&a&O
Z{ } |7KW'=O PZmg7N /2Q@M> public void splitterStop() Vw0cf; { u?6L.^Op bStop = true; gx~79;6 } {U/a h2* 0 UdAF b.V\EOk } 1D159 NLB 7) aitDD AvnK?*5!@ /* MW*@fl<@?M **FileAccess.java +c$]Q-( *//文件访问(定位,写) h.+{cOA;n package NetFox; No#1Ik w import java.io.*; ,5J-C!C rjqQWfShY Wm! lWQu7 public class FileAccessI implements Serializable{ BBnW0vAZ* ,w&8 &wj //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 zG)XB*c RandomAccessFile oSavedFile; j}}:&>; long nPos; z9OhY]PPF )bN|*Bw3 ) inhPd public FileAccessI() throws IOException FaS}$-0 { ti$d.Kc( this("",0); p!5=1$ } {nTQc2T?; `D)ay -ZwQL="t public FileAccessI(String sName,long nPos) throws IOException k/[*Wz$W { "#Ov!t oSavedFile = new RandomAccessFile(sName,"rw"); ]gI>ay"\QA this.nPos = nPos; pt[H5 oSavedFile.seek(nPos); MR:GH.uM: } mqxgrb7 T4MB~5,i ~gU.z6us public synchronized int write(byte[] b,int nStart,int nLen) >b9nc\~ { ]*b}^PQM^ int n = -1; )Lt|]|1B{ try{ )\fAy
oSavedFile.write(b,nStart,nLen); 1 ?X(q n = nLen; S
ykblP37 } 6;"^Id catch(IOException e) ;\~{7 9c { TTB1}j+V6 e.printStackTrace (); a|aRUxa0" } H{}0-0o f`Km ctI lFvRXV^+f return n; :6R0=oz } hF`e>?bN {c5%.<O OT-!n } Mle@.IIT qbu>YTj =fA*b /* MLD-uI10{ **SiteInfoBean.java `U:W (\L */ :5 XNV6^| package NetFox; d:KUJ
Y. S<),
,( GMc{g public class SiteInfoBean { Vy*&po[
pPr/r& r <?|v-(E private String sSiteURL; //Site's URL H"v3?g`S% private String sFilePath; //Saved File's Path r0
%WGMk2 private String sFileName; //Saved File's Name jTVh`d<N private int nSplitter; //Count of Splited Downloading File k&Z3v. d GEMrjx ];@"-H public SiteInfoBean() Fqtgw8 {//nSplitter的缺省值为5 G)qNu } //default value of nSplitter is 5 @
s this("","","",5); 9rhIDA(wc } Co e
q< 'n'83d)z Rx';P/F0C public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) (W*~3/@D { "YIrqk sSiteURL= sURL; OGmOk>_ sFilePath = sPath; X6_m&~}15 sFileName = sName; Vs>/q:I this.nSplitter = nSpiltter; ]-
5p9zl=mT hD OEJ } {/f\lS.5g Xy_ <Yqx} ?Bg<74 public String getSSiteURL() :\
%.x3T' { hg8gB8Xq return sSiteURL; \U^0E> d } R-xWZRl> 4]\f} lWYZAF>?Ym public void setSSiteURL(String value) JE~ci#|! { `Qzga}`"] sSiteURL = value; FcR(uv< } iUcDj: WU}?8\?U% EH;w
<LvT public String getSFilePath() ,^dyS]!d$ { l.tNq$3pS return sFilePath; }=kf52Am,} } x50,4J%J'r L\@SX?j MGUzvSf public void setSFilePath(String value) {~=Edf
{ #lA8yWxr sFilePath = value; b>R/=tx } }Qjp,(ye {fsU(Jj\ IvLo&6swW public String getSFileName() .]_Ye.} { igNZe."V return sFileName; 3?Ckk{)& } n-q d
]LF5*i @^Tof5?F? public void setSFileName(String value) "tuBfA+f { AF5$U8jf sFileName = value; A?{ X5`y } "zSi9]j YmP`Gg#>p &m=Xg(G~c public int getNSplitter() 8nOMyNpy~M { cnm&oC 6 return nSplitter; !mFx= + } )+]8T6~
N ; z_ZZ(W l#P)9$% public void setNSplitter(int nCount) Rpit> { x \qS|q\N nSplitter = nCount; odxsF(Q0p } J8|F8dcz } Yk',a$.S O[O`4de9 :+;AXnDM~ /* D[. ; H)V **Utility.java bH}6N>Fp */ *hI package NetFox; 0T,Qn{ V|.3Z\( :O:Rfmr~ public class Utility { p8<Y5:` V"n0"\k, eto3dJ!R public Utility() y(&JE^GfX { p"4i(CWGS x2B~1edf 2`(-l{3 } FoM4QO (uG.s %I //线程睡眠 olPV"<;+pO public static void sleep(int nSecond) T1bPI/ { .uzg2Kd_ try{ c)8V^7=Q Thread.sleep(nSecond); JpN]j` } /3D!,V, catch(Exception e) eCB(!Y| { u9>zC QRO e.printStackTrace (); Z&W|O>QTl } T^h;T{H2 } sGIY\% 5Cxh>,k //日志 ?29zcuRaru public static void log(String sMsg) }IvJIr { UF)rBAv(/ System.err.println(sMsg); <VV./W8e9 } 6zs&DOB q;3,}emg ? lC.
Pq public static void log(int sMsg) 4fBgmL { Tj@}O:q7: System.err.println(sMsg); Ms5m.lX } K1>.%m } jR7 , b5 bF %#KSVw YK *2 /* 8[i#x|`g **TestMethod.java g~_cYy */ D+{h@^C9Z package NetFox; ~[XDK`B QC0^G,9. cSCO7L2E18 public class TestMethod { DZ~w8v7V }h<\qvCcU "UVqkw,vt public TestMethod() X0
&1ICZ { ///xx/weblogic60b2_win.exe G1M}g8 ]h try{ [0CoQ5:d?& SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); RC Fb&,51 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); N'R^S98x SiteFileFetch fileFetch = new SiteFileFetch(bean); ~/1kCZB fileFetch.start(); y [e$ } :~loy' catch(Exception e){e.printStackTrace ();} >XP]NY}Po[ i' J.c4 kRNr`yfN } 1\q(xka{ Sr~zN:wn }Q_IqI[7 public static void main(String[] args) yrO'15TB { FT73P0!8. new TestMethod(); i_ws*7B< } z<c^<hE:l } %Rv&VFg 点击下载更多相关资料
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