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/* ujan2'YT **SiteFileFetch.java [iGL~RiXtn */ '8V>:dy> package NetFox; -W'T3_ import java.io.*; cZl/8?dj} import java.net.*; linvK.Lf }
3JOC!;; owKOH{otf public class SiteFileFetch extends Thread { +LB2V3UZ Q1^kU0M } v)s;
wD SiteInfoBean siteInfoBean = null; //文件信息Bean Gz kvj:(V long[] nStartPos; //开始位置 cTu"Tu\Qw long[] nEndPos; //结束位置 wNQhg FileSplitterFetch[] fileSplitterFetch; //子线程对象 2e|m3 long nFileLength; //文件长度 X3Yi|dyn T boolean bFirst = true; //是否第一次取文件 'wd&O03& boolean bStop = false; //停止标志 ~Hb2-V File tmpFile; //文件下载的临时信息 t*(buAx DataOutputStream output; //输出到文件的输出流 aM!%EaT
"U o~fJ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) BVe c public SiteFileFetch(SiteInfoBean bean) throws IOException Pt\GVWi_t { HMl
M!Xk? siteInfoBean = bean; H}PZJf_E //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath()));
lqZUU92; tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); wHE1Jqpo if(tmpFile.exists ()) TaNcnAY>9 { +Z1y1%a bFirst = false; 9*;OHoD h read_nPos(); <Oihwr@5< } I'e`?H t else %shCqS { 4o,G[Cf_ nStartPos = new long[bean.getNSplitter()]; vTq
[Xe" nEndPos = new long[bean.getNSplitter()];
kAnK1W> } .~7:o.BE`n Rg\D-F6: yP0XA=,Y 0+ 3{fD/ } 6)[gF1 u}eLf'^ZCe #j4jZBOTM public void run() ?4H>1Wkb { JN> h: //获得文件长度 h)pYV>!d //分割文件 RhD //实例FileSplitterFetch ?5<x$YI //启动FileSplitterFetch线程 EPd
//等待子线程返回 `L7Cf&W\l8 try{ &h'NC%"v if(bFirst) ,&iZ*6=X?0 { $5N\sdyZxg nFileLength = getFileSize(); >?|c>HGX if(nFileLength == -1) bu,xIT ^ { Wo7`gf_ ( System.err.println("File Length is not known!"); ;X%8I$Ba, } C8AR^FW else if(nFileLength == -2) X3R:^ff\ { 8T}Dn\f System.err.println("File is not access!"); h)h%y)1 } 4MPR else (o518fmR { ]6@6g>f? for(int i=0;i<nStartPos.length;i++) 35n'sVn { ^a?g~G nStartPos = (long)(i*(nFileLength/nStartPos.length)); V@pUU~6R } j5MUP&/g3 for(int i=0;i<nEndPos.length-1;i++) CS\8ej}y { v{pW/Fu~ nEndPos = nStartPos[i+1]; y,Z2`Zmu } Tl L\&n.$ nEndPos[nEndPos.length-1] = nFileLength; Nn-EtM0w } lQ!(lPh } O PJ(ub F!zGk(Pu $%.,=~W7 //启动子线程 VYnB&3%DF fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; z yrjb8 for(int i=0;i<nStartPos.length;i++) c]A @'{7 { tu6<> fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Xh@;4n siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Dn:1Mtj- nStartPos,nEndPos,i); _71&".A Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Q=t_m(:0 fileSplitterFetch.start(); oQK,#>rv } (je`sV // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), j9f[){m` siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); "GX k;Y // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", N14Q4v-*x nEndPos = " + nFileLength); FB2{qG3 // fileSplitterFetch[nPos.length-1].start(); Wn&9R
j =kjD ]+l 3u/ GrsF //等待子线程结束 N*SUA4bnuM //int count = 0; @`XbM7D 5 //是否结束while循环 EAV6qW\r5] boolean breakWhile = false;
+Ou<-EQV g1I8_!}~ ~T!D:2G while(!bStop) @T] G5|\ok { vDCbD#.6 write_nPos(); JfRqOEP4Y Utility.sleep(500); ufo\p=pGG breakWhile = true; &Xi]0\M) lm|s% m'WGK`WIm for(int i=0;i<nStartPos.length;i++) BFZ\\rN` { ?I"FmJ; if(!fileSplitterFetch.bDownOver) ?KG4Z { ~(]'ah, breakWhile = false; 5?*Iaw break; 4@=[rZb9 } P5__[aTD } 00pe4^U if(breakWhile) x\ 8gb#8 break; zQoJ8i> R~BFZF>: \ESNfL5 //count++; 5MK.>3fE //if(count>4) )}@Z*.HZL // siteStop(); +>Pq]{Uf1j } j-zWckT{ p~OX1RBI ?dmwz4k0 System.err.println("文件下载结束!"); #r QT)n } vHN/~k# catch(Exception e){e.printStackTrace ();} .F3~eas } [nLd> 2P `KUL4) g~ g ,yB^^% //获得文件长度 GW2v&Ul7( public long getFileSize() %'eaW { jvhD_L/ int nFileLength = -1; Tsocc5gWZ* try{ h9QQ8}g URL url = new URL(siteInfoBean.getSSiteURL()); :=\`P HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); h<i.Z7F;tj httpConnection.setRequestProperty("User-Agent","NetFox"); 5hfx2O) f!G%$?] wsgT`M'J[ int responseCode=httpConnection.getResponseCode(); [6)vD@ if(responseCode>=400) 0aGAF ] { Y#FSU#a$< processErrorCode(responseCode); 64D4*GQ return -2; //-2 represent access is error
TIxlLOs } S"/gZfxer EUS^Gtc ,irc=0M( String sHeader; JC9OL.Ob :<uCi\9( H%;pPkIi for(int i=1;;i++) 1~vv<`- {
5"w% //DataInputStream in = new DataInputStream(httpConnection.getInputStream ());
(Kj>Ao //Utility.log(in.readLine()); Z|j\_VKhl sHeader=httpConnection.getHeaderFieldKey(i); D!D}mPi[ if(sHeader!=null) >Sm#-4B- { Pz-=Eq if(sHeader.equals("Content-Length")) M] W5%3do { ;V^ I>-fnm nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); MT<3OKo?: break; EHm:&w } 2>im'x 5 } EC?U#!kv else 4}Hf"L[ l break; n yNHjn
|W } ;h#CT#R2 } Q#Xa]A- catch(IOException e){e.printStackTrace ();} IXsOTBM catch(Exception e){e.printStackTrace ();} a2H_8iQ! 3Ael %Z(lTvqG Utility.log(nFileLength); E /V`NqC o
Hrx$>W] }:+P{ return nFileLength; K_V$ ktL } 6/Z 8/PL ;MjOs&1f0K n7d`J_%s //保存下载信息(文件指针位置) #4!6pMW(&7 private void write_nPos() %`:+A?zL { rE\.[mFI try{ vo2 T P: output = new DataOutputStream(new FileOutputStream(tmpFile)); 66cPoG output.writeInt(nStartPos.length); 92L{be;SY for(int i=0;i<nStartPos.length;i++) j,#R?Ig { ]BBjFs4# // output.writeLong(nPos);
)F:UkS output.writeLong(fileSplitterFetch.nStartPos); H$]FUv8 output.writeLong(fileSplitterFetch.nEndPos); [RHji47 } S;S_<GX output.close(); cin3)lm } ow,=M%x"0 catch(IOException e){e.printStackTrace ();} SL>0 _ catch(Exception e){e.printStackTrace ();} Y--Uo|H } 3/2G~$C Y ptP_R:2p - Tr*G4 //读取保存的下载信息(文件指针位置) WK 6|e[iP private void read_nPos() )rv<" { I`EgR?5 ` try{ `<d{(9:+ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); pJ]i)$M int nCount = input.readInt(); 1fb!sbGD.k nStartPos = new long[nCount]; FcZ)_m6m nEndPos = new long[nCount]; ~UV$(5&- for(int i=0;i<nStartPos.length;i++) )F4P-u { yn-TN_/Y, nStartPos = input.readLong(); < 5#}EiT5 nEndPos = input.readLong(); V .VV:`S } x$aFJCL input.close(); 7 {#^zr } J2~oIe2!+ catch(IOException e){e.printStackTrace ();} 4';(\42 catch(Exception e){e.printStackTrace ();} pwO
U6A! } Qz/1^xy mmrz:_ Kzgnhgc private void processErrorCode(int nErrorCode) .[4Dvt|>6 { *^P$^lm?S System.err.println("Error Code : " + nErrorCode); E`>u*D$un~ } H:M;H=0 lVQy
{`Ns q%A.)1<'_ //停止文件下载 knJoVo] public void siteStop() |cUBS)[)X { |v%xOl bStop = true; 5Mq7l$]h$ for(int i=0;i<nStartPos.length;i++) &%4*~;o fileSplitterFetch.splitterStop(); uKocEWB=/F w>ap8><4 N61\]BN< } csay\Q{ } 1#<KZN =$ //负责部分文件的抓取 4w5mn6 MxR **FileSplitterFetch.java Fz4g:8qdA */ bR}{xHe package NetFox; 5?n@.hcL ,HE +|y# J_PbRb import java.io.*; +Tw ]u` import java.net.*; &.}Zj*BD `upxM0gc ayQB@2% public class FileSplitterFetch extends Thread { \E<t'\>@X [10;Mg UI>?"b6
L String sURL; //File URL uY6|LTK&x long nStartPos; //File Snippet Start Position 3bW(VvgcL4 long nEndPos; //File Snippet End Position ;<=B I! int nThreadID; //Thread's ID R2[-Q"|Ra boolean bDownOver = false; //Downing is over u\zP`Y boolean bStop = false; //Stop identical hqKftk)+ FileAccessI fileAccessI = null; //File Access interface {)8!> K%G psZAO,p (n,!v) public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 1k8zAtuj { (;@\gRL this.sURL = sURL; ]wQ#8}zO this.nStartPos = nStart; <x|P} this.nEndPos = nEnd; /{9"O y7E nThreadID = id; Dqw?3 KB fileAccessI = new FileAccessI(sName,nStartPos);//定位 ?$#,h30 } #, KjJ J!GWP:b3 C<.Ny,U public void run() d;$<K { _26<}&]b* while(nStartPos < nEndPos && !bStop) *N;# _0)/ {
/M1 / O*ql!9}E{ H?(I-vO try{ oe8sixZ[ URL url = new URL(sURL); 1eZ759PoO HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /b)V=mcR httpConnection.setRequestProperty("User-Agent","NetFox"); ~j`;$o String sProperty = "bytes="+nStartPos+"-"; 9y~5@/32R httpConnection.setRequestProperty("RANGE",sProperty); Yc,qXK- Utility.log(sProperty); azxGUS_i< #Wz7ju; w)hH8jx{ InputStream input = httpConnection.getInputStream(); 8"zFTP*;u //logResponseHead(httpConnection); d,_Ky#K5b n!r<\4I _U"9#< byte[] b = new byte[1024]; Whd2mKwiO int nRead; H7xyK
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) $#k 8xb { ]d}U68$T+ nStartPos += fileAccessI.write(b,0,nRead); %` cP|k //if(nThreadID == 1) B3lP#ckh // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m;S!E-W } h}k/okG !`rR;5&sT a}Dx"zl; Utility.log("Thread " + nThreadID + " is over!"); FSs<A@ bDownOver = true; D[7+xAwS //nPos = fileAccessI.write (b,0,nRead); |Mj2lZS } 8<Y*@1*j catch(Exception e){e.printStackTrace ();} BJ0P1vh6M } %V +hm5Q } W_%p'8, ]>33sb
S6 JfJLJ(} //打印回应的头信息 I,*zZNvRi public void logResponseHead(HttpURLConnection con) xb2xl.2x! { ,[
UqUEO for(int i=1;;i++) OM]d}}=Y { zT\nj&7 String header=con.getHeaderFieldKey(i); 6`tc]a"#Zb if(header!=null) DHUK_#! //responseHeaders.put(header,httpConnection.getHeaderField(header)); |#_ F Utility.log(header+" : "+con.getHeaderField(header)); s+@+<QE else m0I)_R#X[ break; |L@&plyB- } &DX&*Xq2 } /Ria"lLv % Rv;e e;M#MkP7 public void splitterStop() 8QYP\7}o { jf`QoK bStop = true; )(?,1>k`Z } jvI!BZ M@k8;_5 ;.O#|Z[ } xnuu#@f e
ej: lo1<t<w` /* Z%Kkh2-uh **FileAccess.java _(U|Kpi *//文件访问(定位,写) ^V1 .Y package NetFox; \iBEyr] import java.io.*; K@JGGgrE`! S,ENbP%0r ~o_zV'^f@o public class FileAccessI implements Serializable{ mW/6FC [MQU~+] //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 kB2]Z} RandomAccessFile oSavedFile; P}2i[m.*, long nPos; ~rUcko8 6.!aJJLN SBf8Ipe public FileAccessI() throws IOException ,P%a0\ {
5f~49(v] this("",0); UABaS(f3 } %`4\ 8H` sjZ@}Vk3b '`)r<lYN, public FileAccessI(String sName,long nPos) throws IOException w$aiVOjgT { }nsxo5WP oSavedFile = new RandomAccessFile(sName,"rw"); :t7M'BSm2z this.nPos = nPos; ?tA<:.<vtY oSavedFile.seek(nPos); ujLz<5gKuO } ul-A' z]twh&^1L 33M10
1X{6 public synchronized int write(byte[] b,int nStart,int nLen) z0jF.ub { tL#]G?0d int n = -1; @VzD>?) try{ NwISf oSavedFile.write(b,nStart,nLen); *_ U=KpZF n = nLen; pX/42W } !4/s|b9K catch(IOException e) ~jpdDV&u\ { ru#CywK{{; e.printStackTrace (); 7 {n>0@_ } %>mB"Y, M[= #%U3*N !eC]=PoY return n; Pf,lZU?f } ]\.3<^ >.76<fni smJ#.I6/L } O$K?2- 8HaBil YQ`m;< /* J ;|i6q q **SiteInfoBean.java 67{3/(`x */ -s!cZ3 package NetFox; ng-rvr uto
E}U7] "Yy)&zKr public class SiteInfoBean { 4#fgUlV }vXf}2C 6+iZJgwAy private String sSiteURL; //Site's URL %8]~+#]p private String sFilePath; //Saved File's Path (nUSgZz5 private String sFileName; //Saved File's Name =iFI@2 private int nSplitter; //Count of Splited Downloading File 8wX|hK!Gz M,R**z N+#lS7 public SiteInfoBean() YM`I&!n {//nSplitter的缺省值为5 5ieF8F% //default value of nSplitter is 5 v6#i>n~x, this("","","",5); qJyGr ? } "?f_U/+D< <`P7^
'z! 1oSU>I_i public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) #
VAL\Z { iuGly~ sSiteURL= sURL; 4r-CF#o sFilePath = sPath; .1@8rVp7 sFileName = sName; TEEt]R-y this.nSplitter = nSpiltter; \:pd+8 +W}dO# dSkx*#FEE } 9N*!C{VW a?NoNv)& =kiDW6
JJU public String getSSiteURL() 7FYq6wi { Tz<@k return sSiteURL; _]"uq/UWp } q Xj]O3
mm >713H!uj KM&bu='L^ public void setSSiteURL(String value) 8_h:_7e { !gX(Vh*k sSiteURL = value; bH1MDBb2 } v9K=\ j f$I$A(0P y=k!>Y|E public String getSFilePath() -q")qNt. { hha!uD~( return sFilePath; dZ;rn!dg> } s^lm
81; 9'I$8Su RkTO5XO public void setSFilePath(String value) MWHzrqCA { 7c>{og6 sFilePath = value; $>6Kn`UX } ll#_v^ h#?)H7ft G$7!/O%#_ public String getSFileName() hG! |ts { d xk~ return sFileName; o7^u@*"F } Hr}pO"% zLS=>iLD{ rpn&.#KS public void setSFileName(String value) f`Wces=5 { YLkdT% sFileName = value; y|h:{< } vIpitbFC f
J$>VN =+>^:3cCQ public int getNSplitter() E7AYK& { -s,guW | return nSplitter; yT pvKCC } 5
cz6\A& 2y` :#e`x1 je`w$ ^w public void setNSplitter(int nCount) &br_opNi { r6:c<p [c nSplitter = nCount; ]<<+#Rg } > a"4aYj } VU ,tCTXz ("T8 mt[w> 6 ,j&u7 /* NWt5)xl **Utility.java Ou,Eu05jt' */ & 8'QD~ package NetFox; aX,ux9# 0OF ]|hH jQRl-[n public class Utility { Y>a2w zr S/H!a:_5r {q^?Rw public Utility() J]mq|vE { n.tJ-l5[ r>.^4Z@ YdiXj |k+ } ~h@<14c{X ~ s# !\Ye //线程睡眠 e,rCutA) public static void sleep(int nSecond) &Rxy]kBA { * u{CnH try{ Yt#e[CYnu Thread.sleep(nSecond); Zg2F%f$Y } <h<4R Rj catch(Exception e) ^ Z~'>J { ?KF.v1w7 e.printStackTrace (); 6z>Zm1h } #M5[TN! } .pd_SQ~ :"e,&
% //日志 F2k)hG*|{ public static void log(String sMsg) N,Ys}qP { q[T='!Z\ System.err.println(sMsg); :.%Hu9=GL } Kl)PF), FdVWj
5 $a {8as _ public static void log(int sMsg) ' *x?8-K P { ee5QZ, System.err.println(sMsg); jhmWwT/O8^ } "Ca?liy } is,r: @vcvte 7<?~A6 /* )s';m$ **TestMethod.java %}%vey */ %`Q<_LTU package NetFox; #Kp/AN5YC !Qd4Y= B U^3U x$ public class TestMethod { Z*Qra4GBl] (&x#VmDL ]/y&5X public TestMethod() &%/kPF~< { ///xx/weblogic60b2_win.exe {Noa4i try{ HBc^[fJ^- SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Y"U -Rc //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Zg@NMT SiteFileFetch fileFetch = new SiteFileFetch(bean); '[h|f fileFetch.start(); /o19/Pvwm } tE: m&
;I catch(Exception e){e.printStackTrace ();} %kg%ttu7 ,&\uuD&.@ >/DyR+?>4 } >|[74#}7 D%0GXUp uK`T1*_ public static void main(String[] args) 27t23@{YL { HZ1e~IIw new TestMethod(); wM;9plYlw0 } `.FvuwP } TuBl9 p'6 点击下载更多相关资料
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