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/* RRV%g! **SiteFileFetch.java J7^UQ */ $;'M8L package NetFox; Z) 2d4:uv import java.io.*; ~LZrhwVj$ import java.net.*; GZ,MC?W =B5{ 7g\ 7 4MxU public class SiteFileFetch extends Thread { p)ig~kk` '4<o&b^yQ E #B$.K SiteInfoBean siteInfoBean = null; //文件信息Bean J-<_e?? long[] nStartPos; //开始位置 /I!62?)-* long[] nEndPos; //结束位置 n6+h;+8;] FileSplitterFetch[] fileSplitterFetch; //子线程对象 T!ZjgCY} long nFileLength; //文件长度
WZY+c boolean bFirst = true; //是否第一次取文件 (RV#piM boolean bStop = false; //停止标志 /e|Lw4$@S File tmpFile; //文件下载的临时信息 u!5q)>Wt( DataOutputStream output; //输出到文件的输出流 jC4>%!{m kfZ`|w@q //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) kLF`6ZXtd public SiteFileFetch(SiteInfoBean bean) throws IOException aHmg!s}& { 7 QNx*8 p siteInfoBean = bean; Pd\4hy //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Fa[^D~$l* tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); )Uy%iE* if(tmpFile.exists ()) ZTV)D { t!*[nfR bFirst = false; 1n[)({OQ read_nPos(); Mms|jFoQ }
vxTn else -0#"<!N { z!O;s
ep?/ nStartPos = new long[bean.getNSplitter()]; 6V%}2YE?X nEndPos = new long[bean.getNSplitter()]; r KUtTj } 'jfE?ngt z k/`Uz 6PYt>r&TO cWZITT{A } 6j XDLI 'z
AvQm #IvKI+" public void run() GdI,&|/ { 'ia-h7QWS //获得文件长度 {?0'(D7. //分割文件 I9qFXvqL //实例FileSplitterFetch -^2p@^ //启动FileSplitterFetch线程 3*~`z9-z //等待子线程返回 BVNJas try{ v_EgY2l( if(bFirst) ~`FRU/@r { g9|OhymB nFileLength = getFileSize(); {)l Zfj}l if(nFileLength == -1) ; F'IS/ttX { gv>DOez/ System.err.println("File Length is not known!"); jVd`J } F:T(-, else if(nFileLength == -2) el*|@#k} { V 97ORI System.err.println("File is not access!"); Mf#@8"l } [*p;+&+/ZM else oo\^}jb { 5=I({=/> for(int i=0;i<nStartPos.length;i++) e'A_4;~@s { BInSS*L nStartPos = (long)(i*(nFileLength/nStartPos.length)); //BJaWq } [|oG}'Xz for(int i=0;i<nEndPos.length-1;i++) 1C{0 R. { Si]?4:E7= nEndPos = nStartPos[i+1]; 7*+CX } (WC
=om nEndPos[nEndPos.length-1] = nFileLength; [mu8V+8@d4 } tj~r>SRb+ } pNOE
KiJ 0*b8?e ,HTwEq>-G //启动子线程 kD )31P fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; mMwV5\( for(int i=0;i<nStartPos.length;i++) pI-Qq%Nwt { x5uz$g fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), X^N6s"2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), xOKJOl nStartPos,nEndPos,i); Z9$pY=8^? Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); @2h hB W fileSplitterFetch.start(); W9Azp8)p] } lf>d{zd5 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 81x/bx@L% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); >^Wpc // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", >W] Wc4\ nEndPos = " + nFileLength); \O"H#gt // fileSplitterFetch[nPos.length-1].start(); m`-:j"]b$ =K} Pfh PL&>pM //等待子线程结束 pLCj"D).M //int count = 0; j!i*& //是否结束while循环 8xAI n>,_ boolean breakWhile = false; M?sax+' aC2Vz9e "zJ xWXI while(!bStop) OP=brLGu0 { x}K|\KXy write_nPos(); HJN GO[*g Utility.sleep(500); 1?H;
c5?d& breakWhile = true; NzyEsZ]$ "=s}xAM|A pP":,8Q{ for(int i=0;i<nStartPos.length;i++) ^g6v#]&WA { KJoa^e;~ if(!fileSplitterFetch.bDownOver) hbJy<e1W { =t-Ud^3 breakWhile = false; yg'CL/P break; W`9{RZ' } 9`/e=RL }
gPB=Z! if(breakWhile) 8iY.!.G#| break; *Ci&1Mu^Z Al*=%nY j1g$LAe //count++; '+/mt_re= //if(count>4) 9ns( F: // siteStop(); fDns r"T } 4 N$Wpx iu=Mq|t0 )uHat# System.err.println("文件下载结束!"); [>?|wQy >= } ];Noe9o catch(Exception e){e.printStackTrace ();} faRQj:R8 } @-S7)h>~ :2c(.-[` N\ Mdia //获得文件长度 4h!yh2c.. public long getFileSize() u;nn:K1QFr { 8Gy]nD int nFileLength = -1; 2EpQ(G
J try{ vzI>:Bf URL url = new URL(siteInfoBean.getSSiteURL()); i=n;rT HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); liPrxuP` httpConnection.setRequestProperty("User-Agent","NetFox"); $!9U\Au>2 A}9^,C$# 3l~7 int responseCode=httpConnection.getResponseCode(); >g!$H}\ if(responseCode>=400) n]#YL4j { <Rw2F?S~)n processErrorCode(responseCode); kYkA^Aq return -2; //-2 represent access is error +1cr6a } N<<wg{QO #@BhGB`9Qt GPh;r7xg6 String sHeader; ]SA/KV 6)YckxN^ !1R?3rVQS for(int i=1;;i++) ?SYmsaSr5 { ,x&WE@tD| //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); W#g!Usf:/ //Utility.log(in.readLine()); I_8 n>\u sHeader=httpConnection.getHeaderFieldKey(i); }o!b3*# if(sHeader!=null) WP\kg\o { j7g>r/1eE if(sHeader.equals("Content-Length")) 7CR#\&h` { +pq=i nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ,|$1(z*a{c break; $ bMmyDw } dRzeHuF92 } Z:h'kgG & else \PN*gDmX break; <Ffru?o4j } e/g9r } 6bj77CoB catch(IOException e){e.printStackTrace ();} qmnl catch(Exception e){e.printStackTrace ();} aOinD r\fkx> F7C+uGTs Utility.log(nFileLength); 4Hf'/%kW ux^rF 5#f_1
V return nFileLength; jt6_1^ } 9wfE^E1 ?Mo)&,__ F#9^RA)9 //保存下载信息(文件指针位置) :&&s*_ private void write_nPos() 5,4" CF$ { J(]b1e try{ v\9f 8|K output = new DataOutputStream(new FileOutputStream(tmpFile)); *\:sHVyG( output.writeInt(nStartPos.length); a6h+?Q7uF for(int i=0;i<nStartPos.length;i++) `j'1V1 { |AExaO"jk // output.writeLong(nPos); k fY; output.writeLong(fileSplitterFetch.nStartPos); 3jfAv@I ~ output.writeLong(fileSplitterFetch.nEndPos); KIY`3Fl09 } +pK 35u output.close(); t; #@t/` } \ 6taC catch(IOException e){e.printStackTrace ();} It2:2 catch(Exception e){e.printStackTrace ();} >f&L7@ } \uo{I~Qd Zr6.Nw g*_n|7pB //读取保存的下载信息(文件指针位置) }vP(SF6 private void read_nPos() O`_, _ { )j}#6r try{ mIrN~)C4\ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); FnOahLS int nCount = input.readInt(); >U\P^yU nStartPos = new long[nCount]; ]T5\LNyN nEndPos = new long[nCount]; |DsT $~D for(int i=0;i<nStartPos.length;i++) Dh}d-m_5 { Uv<nJM nStartPos = input.readLong(); _@)-#7 nEndPos = input.readLong(); ^u90N>Dvq } q3v5gz^t input.close(); ntPX?/ } ^XYK
}J catch(IOException e){e.printStackTrace ();} +>yh`Zb catch(Exception e){e.printStackTrace ();} yoieWnL} } <7Yh<(R e^ keQRS+9 t<}N>%ZO private void processErrorCode(int nErrorCode) k=p[Mlic/ { t5 ^hZZ System.err.println("Error Code : " + nErrorCode); rR{KnM } CO,{/ gE*7[*2?t zFYzus`> //停止文件下载 'O2/PU2_ public void siteStop() f#I#24)RH { yZoJD{'?Sw bStop = true; ON>l%Ae4G for(int i=0;i<nStartPos.length;i++) .n.N.e fileSplitterFetch.splitterStop(); |eye) E: f*xv#G KT(v'KE 1 } iN0'/)ar } :T@} CJ //负责部分文件的抓取 )Xt#coagS **FileSplitterFetch.java N3KI6p6 \ */ hhU\$'0B- package NetFox; 5}5oj37x 64"DT3: }=gD,]2x8 import java.io.*; C(>g4.-p8 import java.net.*; h'vBWtMa =l]
lwA- Ed_Fx' public class FileSplitterFetch extends Thread { 5~[][VV^ [T[]U 5V/]7>b1 String sURL; //File URL ,|#biT-<T long nStartPos; //File Snippet Start Position @0tX,Z9 long nEndPos; //File Snippet End Position i3L2N~:V int nThreadID; //Thread's ID +4qR5(W boolean bDownOver = false; //Downing is over f}.t boolean bStop = false; //Stop identical H|`D3z.c FileAccessI fileAccessI = null; //File Access interface ^e\$g2). 9R-2\D] "8a ?KQ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ~`$P-^u88X { G~_D'o<r this.sURL = sURL; %SCt_9u this.nStartPos = nStart; /#t::b+>x this.nEndPos = nEnd; 1@TL>jq nThreadID = id; /&czaAR- fileAccessI = new FileAccessI(sName,nStartPos);//定位 m'
|wlI[lq } >-3>Rjo> tU!Yg"4Q fb[lL7 public void run() Z rgv* { @1bl<27 while(nStartPos < nEndPos && !bStop) G%!i="/9 { {}RU'<D
{z;K0 0#m=76[b try{ NP4u/C< URL url = new URL(sURL); f1U8 b*F< HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ff
=%eg] httpConnection.setRequestProperty("User-Agent","NetFox"); VKlC`k8L String sProperty = "bytes="+nStartPos+"-"; ]vV)$xMX httpConnection.setRequestProperty("RANGE",sProperty); VH+3o?nrT Utility.log(sProperty); w7q6v> E1w8d4P,G |S<!'rY InputStream input = httpConnection.getInputStream(); gg#lI| //logResponseHead(httpConnection); ~oK0k_{~ +nB0O/m'U RHbbj}B byte[] b = new byte[1024]; ;v.J
D7 int nRead; r%$\Na'' while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 0$=U\[og { ]HXHz(?;F nStartPos += fileAccessI.write(b,0,nRead); Oc.8d< //if(nThreadID == 1) TnKOr~ @* // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )
jM-5}" } >r}?v3QW .*W7Z8!e >@-.rkd( Utility.log("Thread " + nThreadID + " is over!");
J!3;\ bDownOver = true; hl)jE
06 //nPos = fileAccessI.write (b,0,nRead); XW^Pz( } _[l&{, catch(Exception e){e.printStackTrace ();} i],~tT|P } uz20pun4B } z_A\\ bTAY5\wB ,C_MB1u //打印回应的头信息 ,K30.E public void logResponseHead(HttpURLConnection con) OJM2t`}_t { 9q[[
,R
for(int i=1;;i++) B|M@o^Tf { \CS4aIp String header=con.getHeaderFieldKey(i); j+gh*\:q if(header!=null) xbHI4A"Z //responseHeaders.put(header,httpConnection.getHeaderField(header)); X%B$*y5 Utility.log(header+" : "+con.getHeaderField(header)); e5;YY else +br'
2Pn break; FlrY Xau } #e@[{s7 } 5'w&M{{9 O CCC' k +t
Prqv"( public void splitterStop() vD/l`Ib: { 1g$xKe~]4 bStop = true; 'L{pS-+6 } &wu1Zz[qcz Y$./!lVY ^\\9B-MvY } =`CK`x #i.BOQxS gt~u/Z% /* *;F<Q!i&v **FileAccess.java LFYSur8 *//文件访问(定位,写) WZTv package NetFox; '[_.mx|cd` import java.io.*; FBzsM7]j a6It1%a+ f%[xl6VE; public class FileAccessI implements Serializable{ n 1^h;2gz Ruwp"T}mF //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 zh(=kS` RandomAccessFile oSavedFile; '9&@?P; long nPos; <'hoN/g P^lzbWj^ Bw[#,_ public FileAccessI() throws IOException zQu9LN { #%#N.tB5 this("",0); ]ZI@?H?
O } )g]A
'A= V<PH5'^$j j*GS')Cm public FileAccessI(String sName,long nPos) throws IOException KO"+"1 . { !i@A}$y oSavedFile = new RandomAccessFile(sName,"rw"); WK#%G this.nPos = nPos; 9gIim oSavedFile.seek(nPos); SFFJyRCz } E4_,EeC# cw0uLMqr` DC_k0VBn public synchronized int write(byte[] b,int nStart,int nLen) :TV`uUE { LA/Qm/T int n = -1; QXy=| try{ ~9;udBfwF oSavedFile.write(b,nStart,nLen); tk:G6Bkid n = nLen; wMCgLh\wi } hx:^xW@r4P catch(IOException e) hC]:+.Q+ { ?k^m|Z e.printStackTrace (); X_,R!$wbg: } (FGHt/! V<ilv< S5UQ
return n; GE !p } WU,b<PU & axN\ZXU C!6D /S } |=:hUp Jp r;wm`(e l%2 gM7WMY /* n5tsaU; **SiteInfoBean.java (W[]}k; */ Y&DoA0/y package NetFox; # |OA>[ s<3M_mt q; C6ID` public class SiteInfoBean { OF-g7s6VH slP>; HoeW6U V private String sSiteURL; //Site's URL 3Lv5>[MnN private String sFilePath; //Saved File's Path S{{wcH$n'i private String sFileName; //Saved File's Name :1]J{,VG private int nSplitter; //Count of Splited Downloading File 1vJj?Uqc |PGTP#O< 95ix~cH3q public SiteInfoBean() EDF0q i {//nSplitter的缺省值为5 .%M80X{5~ //default value of nSplitter is 5 <l eE.hhf. this("","","",5); .CW,Td3f! } _E/ "2 :zWh7| yOk{l$+ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 2a 7"~z~ { /^X)>1)j sSiteURL= sURL; -%V~1 sFilePath = sPath; <B @z>V sFileName = sName; PO:sF]5 this.nSplitter = nSpiltter; !>GDp >0 jQBn\^w HLc3KYIk } <$K7f f=8{cK0j lW4 6S public String getSSiteURL() i4M%{]G3Y { Ie s` !W^ return sSiteURL; \#F>R, } 5%@~"YCo \H1t<B, Tiimb[| public void setSSiteURL(String value) #GUD^#Jh { ]AN%#1++U sSiteURL = value; wb##|XyK<c } nAX/u[ GBT219Z@8 (''w$qq"D public String getSFilePath() 7=qvu&{ { VM;vLUu!e return sFilePath; 3[ xHY@c } /R>YDout} BE54L+$p ' hdLQ\J public void setSFilePath(String value) Ua~8DdW { 7d+0'3% sFilePath = value; /1Ss |. } N0 mhgEA <KI>:@|Sc :EH>&vm public String getSFileName() us.IdG { O.-A)S@ return sFileName; kX)*:~* } 0+.<BOcW5 Xc~BHEp 5Y@Hb!5D public void setSFileName(String value) O]@s`w { IfY?P(P sFileName = value; o5m]Gqa } P5GV9SA Rh)%; `f<w+u public int getNSplitter() `L!L=.}4 { :z%Zur+n c return nSplitter; $P2*qpqy } tC.etoh $0+&xJVn }U%T6~_wR public void setNSplitter(int nCount) c}H}fyu%n { BbPRPkV nSplitter = nCount; K1&t>2=% } V=YDqof } gN*b~&G {xICR ~,* l j+p}dt /* m9\~dD **Utility.java Zb'a+8[ */ H;ujB \+ package NetFox; j8^zE,Z .
K_Jg$3 1{1mL-I; public class Utility { ['3E'q,4& #nmh=G?\Sm bkrl>Im<n public Utility() .
+,{|){c { CdtCxy5 +6^hp-G7 6 B7F } mXyg\5 q%,y66pFr //线程睡眠 ~ftR:F|9 public static void sleep(int nSecond) ]3Jb$Q@ { C^:{y try{ ~4xn^.w Thread.sleep(nSecond); ,| j\x } KTeR;6oZn" catch(Exception e) k`s_31< { 0n={Mb e.printStackTrace (); 90ov[|MkM } r"t,/@`n } bw!*=< `(6cRT`Wp //日志 h8;H<Y;yQ public static void log(String sMsg) 7|o}m}yVx { *?>52 -&b System.err.println(sMsg); ih|&q } ,vBB". LY' zz8NBO z(#dL>d$' public static void log(int sMsg) n;~'W*Ln0 { Qo*OC 9E` System.err.println(sMsg); s{42_O?,c } >gl.ILo } o> &-B.zq +6n\5+5 9! yDZ<s /* BL-7r=Z **TestMethod.java 6_:KFqc W */ w{4#Q[ package NetFox; iRM ?_| &vfeBth %/S HB public class TestMethod { v+( P 4fS p4$4;) `7.$
A U public TestMethod() =GiN~$d { ///xx/weblogic60b2_win.exe phwBil-vUU try{ Fc|N6I'o SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); #eF
k //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); #T8PgmR SiteFileFetch fileFetch = new SiteFileFetch(bean); `3z6y&dmx fileFetch.start(); ]?NiY:v } xS=" o catch(Exception e){e.printStackTrace ();} G'wyH[ d/ $J0o%9K
eQMa9_ } nB}eJD| PtGFLM9R ke)<E98DC public static void main(String[] args) ~3|)[R=+p1 { N{6-a new TestMethod(); Q<yvpT( } t"5ZYa } R?Ch8mW.! 点击下载更多相关资料
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