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/* U:]MgZWn **SiteFileFetch.java o]Wz6L */ (kIz package NetFox; pI7Ssvi^ import java.io.*; X9fNGM1 import java.net.*; Di*]ab |gnAqkW0 u#`+[AC` public class SiteFileFetch extends Thread { ImIqD&a-h 1^C|k(t {-@~Q.&}v SiteInfoBean siteInfoBean = null; //文件信息Bean NZLXN long[] nStartPos; //开始位置 [p ii long[] nEndPos; //结束位置 2sKG(^=Z FileSplitterFetch[] fileSplitterFetch; //子线程对象 .^i<xY long nFileLength; //文件长度 :l+_ja&o boolean bFirst = true; //是否第一次取文件 pW\z\o/2 boolean bStop = false; //停止标志 4\M8BRuE File tmpFile; //文件下载的临时信息 *URdd,){i DataOutputStream output; //输出到文件的输出流 eZg$AOpU P##Z[$IJ3 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) W h| L public SiteFileFetch(SiteInfoBean bean) throws IOException !@u&{"{` { a3q\<"| siteInfoBean = bean; (ZV;$N-t //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); HZ
}6Q tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); %>Bko,ET if(tmpFile.exists ()) @(-yrU { +?;j&p bFirst = false; pOMgEEhfS read_nPos(); _J,xT } 4O!E|/`wO else F>N+<Z { @,k7xm$u nStartPos = new long[bean.getNSplitter()]; nfX12y_SXL nEndPos = new long[bean.getNSplitter()]; td >,TW=A* } .Gh%p`< lop uf/U0 xf/m!b"p Fn!SGX~kx$ } Z,WubX< %e{(twp )1f+ld%R public void run() o/cr{>"N { c3] C:t+ //获得文件长度 XLm@etf //分割文件 -Q$b7*"z( //实例FileSplitterFetch KAed!z9 //启动FileSplitterFetch线程 :#{-RU@PS //等待子线程返回 Wr5 Q5s)c try{ hK(tPl$ if(bFirst) x=-0 zV { :.$"kXm^
nFileLength = getFileSize(); ?;
[ T if(nFileLength == -1) )lh8
k{ { IaLMWoh System.err.println("File Length is not known!"); h4(JUio } *69c-`o else if(nFileLength == -2) R)+t]} { R}r~p?(M System.err.println("File is not access!"); /b#q*x-b } T C8`JU=wV else /s|{by`we4 { !
_{d)J for(int i=0;i<nStartPos.length;i++) .x}gg\ { ;,XyN+2H nStartPos = (long)(i*(nFileLength/nStartPos.length)); ;/'|WLI9 } =Vb~s+YW for(int i=0;i<nEndPos.length-1;i++) ,
T\- ;7 { &>(gt<C$ nEndPos = nStartPos[i+1]; 5 y } \"x>JW4w nEndPos[nEndPos.length-1] = nFileLength; :)IV!_>'d } cy|%sf` } KE.Dt NZk&JND ?x3Jv<G0* //启动子线程 :.uk$jx fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; |]W2EV ,b for(int i=0;i<nStartPos.length;i++) #?Mj$ZB { \a)) fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), uZIJoT siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), _BS
9GB nStartPos,nEndPos,i); 7,'kpyCj Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?NG=8.p fileSplitterFetch.start(); Jdj?I'XtY } |QMA@Mx // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +Ok%e.\ZM siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 5~+XZA#2 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", bik*ZC?E nEndPos = " + nFileLength); *1^$.Q& // fileSplitterFetch[nPos.length-1].start(); -M4p\6)Ge >72JV;W] 30Drrno7Io //等待子线程结束 r:&|vP //int count = 0; xAhxD|4_ //是否结束while循环 pQWHG#?7 boolean breakWhile = false; 8TWTbQ CQ^3v09N;~ Qi9-z' while(!bStop) E0 l_-- { \+nGOvM write_nPos(); qZk:mlYd Utility.sleep(500); A\$
>>Z breakWhile = true; Z4hLdHo_ B4g8
~f Br5o7(AE for(int i=0;i<nStartPos.length;i++) 4w$_]ke { (\,BxvhG= if(!fileSplitterFetch.bDownOver) osHCg { }Hcx=}j breakWhile = false; ^6;V}2>v} break; 3l4NC03I& } @T:faJ5\' } B_^]C9C| if(breakWhile) bw4oLu? break; #=,imsW) SO{p ;g nFM@@oA //count++;
2oVV'9;B //if(count>4) DN8}glVxV // siteStop(); ~i0R^qfr } SJ?)%[(T #VGjCEeU sZhMa> System.err.println("文件下载结束!"); ^3]UZ@ } @;Opx." catch(Exception e){e.printStackTrace ();} 9YN? } e8P-k3a"5: K#mOSY;} \7v)iG|#G& //获得文件长度 Q2|p\rO public long getFileSize() _\8qwDg"#e { Pbu{'y3J int nFileLength = -1; v?:: |{ try{ kH948<fk3 URL url = new URL(siteInfoBean.getSSiteURL()); [xZU!= HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ) R2XU httpConnection.setRequestProperty("User-Agent","NetFox"); $V>yXhTh r[txlQI9 ZKpvDH' int responseCode=httpConnection.getResponseCode(); #{J,kcxS if(responseCode>=400) 5|8^9Oe5 { sLL7]m} processErrorCode(responseCode); If-_?wZe return -2; //-2 represent access is error T7*wS#z)h } 0CExY9@Wq ,*svtw:2') w#y0atsg' String sHeader; mpw~hW0- ZWUP^V 3gZ8.8q3 for(int i=1;;i++) 3_$w|ET { jXg //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); An`3Ex[
//Utility.log(in.readLine()); IE2"rQ T sHeader=httpConnection.getHeaderFieldKey(i); .)tSg if(sHeader!=null) XMIbUbUk- { ~B i_7 Q if(sHeader.equals("Content-Length")) XGrue6ya { `#P$ ]: nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); S>Yj@L break; S$q=;" } 'tgKe!-@ } hqvE!Of else Guw}=l--YR break; )cJ#-M2 } }_'IE1bA } W_|0y4QOo catch(IOException e){e.printStackTrace ();} 0%Ll catch(Exception e){e.printStackTrace ();} fxcc<h4 }T2xXbU D;}xr_ Utility.log(nFileLength); pKUP2m`MW K5>p89mZ tRb]7 z return nFileLength; 1{x.xi"A/ } SLL3v,P(7 /1UOT\8U \Q?ip&R //保存下载信息(文件指针位置) 'dG%oDHX]P private void write_nPos() ]}="m2S3 { `r"+644 try{ JuR"J1MY output = new DataOutputStream(new FileOutputStream(tmpFile)); o G*5f output.writeInt(nStartPos.length); G3P&{.v for(int i=0;i<nStartPos.length;i++) 6fo3:P*O { K)tQ]P // output.writeLong(nPos); "p&Y^] output.writeLong(fileSplitterFetch.nStartPos); CqMhk output.writeLong(fileSplitterFetch.nEndPos); Cwa^"r3P1 } (& "su3z output.close(); yF}OfK?0f } ?t&kb7 catch(IOException e){e.printStackTrace ();} B Xms;[ catch(Exception e){e.printStackTrace ();} tc;'oMUP } Qj{8?lew |~`as(@Ih +d}E&=p_ //读取保存的下载信息(文件指针位置) kl!wVLE private void read_nPos() p@!nYPr. { Z%zj";C
G try{ $
i)bq6 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ^ 2GHe<Y int nCount = input.readInt(); 2,2Z`X nStartPos = new long[nCount]; "xI" nEndPos = new long[nCount]; aimarU for(int i=0;i<nStartPos.length;i++) 6k{2 +P { ,_aM`%q?Fj nStartPos = input.readLong(); <P[T!gST nEndPos = input.readLong(); bK"SKV } i$G;f^Z!Y
input.close(); (
9!k# } H`bSYjgM! catch(IOException e){e.printStackTrace ();} K%<j=c catch(Exception e){e.printStackTrace ();} g6@Fp7T } c .3ZXqpI; ,u }XWV ^H{R+} private void processErrorCode(int nErrorCode) (/!r(#K0,' { #4MBoN(3 System.err.println("Error Code : " + nErrorCode); <9E0iz+j } ptatzp]c# 5Wyz=+?m| qf@q]wtar //停止文件下载 8KB>6[H!wE public void siteStop() sQ6}\ { <~}7Mxn%x@ bStop = true; M#"524Nz for(int i=0;i<nStartPos.length;i++) ~vmdXR`'T fileSplitterFetch.splitterStop(); 7Dzuii?1 !-2R;yo12 'j^xbikr } ]V %.I_ } D0k
8^ //负责部分文件的抓取 e0@6Pd **FileSplitterFetch.java n55Pv3}C */ v(*C%.M) package NetFox; h~&gIub UDhG : =9oPowq import java.io.*; I}e3zf> import java.net.*; i|w8.}0 Wcb7
;~K ]2# public class FileSplitterFetch extends Thread { bfB\h*XO '1,,)U#6E 5w %_$x String sURL; //File URL =U8a ?0 long nStartPos; //File Snippet Start Position {Q+gZcu long nEndPos; //File Snippet End Position )1N 54FNO int nThreadID; //Thread's ID ul%h@=n boolean bDownOver = false; //Downing is over ZX ?yL>4 boolean bStop = false; //Stop identical D3|oOOoG FileAccessI fileAccessI = null; //File Access interface QM3,'?ekRH f|^dD` 5MFxo63 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ,jXM3?>B { O^/Maa/D1 this.sURL = sURL; FMkOo2{ this.nStartPos = nStart; >fH=DOz$& this.nEndPos = nEnd; D:k3"
E"S nThreadID = id; `D9]*c
!mO fileAccessI = new FileAccessI(sName,nStartPos);//定位 :4~g;2oag } ^TMJ8`e `_b`kzJ hN['7:bQ public void run() 3qY K_M^[ { 5H=ko8fZ= while(nStartPos < nEndPos && !bStop) ~/mwx8~ {
T+N|R [M.f-x: k>t)g-,2 try{ "ZTTg>r URL url = new URL(sURL); |
8qBm HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); bSVlk` httpConnection.setRequestProperty("User-Agent","NetFox"); :2njp% String sProperty = "bytes="+nStartPos+"-"; e]jH+IR:> httpConnection.setRequestProperty("RANGE",sProperty); Bo<>e~6P Utility.log(sProperty); R!l:O=[< u:aW 8 TCT57P#b InputStream input = httpConnection.getInputStream(); I^oE4o //logResponseHead(httpConnection); d
Le-nF dt~YW
#gm)dRKm% byte[] b = new byte[1024]; yLsz8j-QJ int nRead; piU/& while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) A'G@uD@3 { \rVQQ|l nStartPos += fileAccessI.write(b,0,nRead); %0? M?Jf //if(nThreadID == 1) DE2a5+^ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); F:6SPY
y } w.&1%X(k "5eNLqt^q q>w)"Dd Utility.log("Thread " + nThreadID + " is over!"); cBo{/Tn: bDownOver = true; }K8/-d6 //nPos = fileAccessI.write (b,0,nRead); wvrrMGU)a } 7\ nf:. catch(Exception e){e.printStackTrace ();}
9CCkqB/ } )5|I_PXB } ='TE,et@d 6sa"O89 ~G27;Npy //打印回应的头信息 8foJ I^3 public void logResponseHead(HttpURLConnection con) YC_1Ks { &Wf3~hmo for(int i=1;;i++) >5Wlc$bc { SZJ$w-<z String header=con.getHeaderFieldKey(i); z<.?x%4O if(header!=null) iS5W>1] //responseHeaders.put(header,httpConnection.getHeaderField(header)); G;f/Tch Utility.log(header+" : "+con.getHeaderField(header)); N{-]F|XX else z5W@`=D break; <cA/<3k) } J)mhu} } %F kMv v\`9;QV5 p-+K4 public void splitterStop() 8EVgoJ. { BL 3gKx.' bStop = true; zD3mX<sw } 9<Kj6t_ 3pmWDG6L )"+(butI& } P;pl,~ 2< hAa9y 3BpZX`l*p /* D~o$GW% **FileAccess.java N41 R *//文件访问(定位,写) <L&m4O#| package NetFox; y<b{Ji e import java.io.*;
^Q&u0;OJ "T H6o:x ^!q?vo\j| public class FileAccessI implements Serializable{ $<ld3[l i fvb=#58N_ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 c*UvYzDZL RandomAccessFile oSavedFile; 0j C3fT!n long nPos; Qv-@Zt!8 /*|oL#hK Kt0(gQOr0 public FileAccessI() throws IOException GJqE!I,. { *6(kbe s this("",0); `gKf#f } .k[o$z\EkF x1 1U@jd+1 sZ?mP;Q public FileAccessI(String sName,long nPos) throws IOException @,XSs { 2 1PFR:lP7 oSavedFile = new RandomAccessFile(sName,"rw"); ![f ![l this.nPos = nPos; /t-fjB{=G oSavedFile.seek(nPos); vd6l7"0/ } vf4{$Oag Q]o C47( ItVugI(^ C public synchronized int write(byte[] b,int nStart,int nLen) /pp1~r.s?> { .G o{1[ int n = -1; F7")]q3I~ try{ ;O<9|? oSavedFile.write(b,nStart,nLen); ?JxbSK# n = nLen; "`[!L z } tTU=+*Io catch(IOException e) P9T5L<5 { .Yw'oYnS e.printStackTrace (); F ]O$(7* } Su 5>$ Pl-5ncb\ fh^lO ^ return n; @xc',I } :R.&`4=X (RtueEb.~E rWh6RYd<T } Q?AmOo-a N$[$;Fm: lgpW@g /* _bD/D!| **SiteInfoBean.java =+w*gDr */ ;L&TxO>#J package NetFox; E\m5%bK\B M,}|tsL . @Ut?G public class SiteInfoBean { pWu LfX 34!dYr% RI2f`p8k private String sSiteURL; //Site's URL 'Peni1_ private String sFilePath; //Saved File's Path >R/$1e1Y private String sFileName; //Saved File's Name Z/rTVAs@r private int nSplitter; //Count of Splited Downloading File #yI.nzA* PR|R`.QSs ,#W public SiteInfoBean() 5<L_|d)0" {//nSplitter的缺省值为5 |y20Hi': //default value of nSplitter is 5 m5G \}8| this("","","",5); 2&Nb } $BmmNn# -*2Mf Mh &_5tqh public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 1c+]gIe { {YUIMd!Y sSiteURL= sURL; wW?,;B'74 sFilePath = sPath; XBQ\_2> sFileName = sName; #"fJa:IYG7 this.nSplitter = nSpiltter; ob_I]~^I?| fIF<g@s r}yG0c, } %r)avI F_uY{bg 3?E8\^N\n public String getSSiteURL() lt$zA%`odc { . |*f!w}5 return sSiteURL; H UoyLy } !6&W,0< `MP|Ovns:H fA48(0p public void setSSiteURL(String value) fri0XxF { R_sC! - sSiteURL = value; 2wqk,c[] } 8vk..!7n} ,7,g%?_P MzIq"3 public String getSFilePath() e4OeoQ@ > { _ .i3,-l) return sFilePath; >\ST-7[^L } B5X sGLV J/);"bg_O $N2SfyX7 public void setSFilePath(String value) hC_Vts[v/ { c.\O/N
sFilePath = value; G1 o70 } ^7]"kg DA fQ>4MKLw=d ]aCk_*U public String getSFileName() l!E7AKk8 { #<( = }? return sFileName; eK /?%t } TST4Vy3 >Q,zNs e7u^mJ public void setSFileName(String value) ZV}X'qGaq { +D#Z n!P sFileName = value; 8&"(WuZ@ } ;jK#[*y }_QKJw6/" f^e6<5gdf public int getNSplitter() UkCnqNvx { =G~~?>=@2 return nSplitter; !A8^Xmz" } -G
&_^"=R HEqWoV]{d K7I&sS^x public void setNSplitter(int nCount) 04!(okubyp { 7:=5"ScV nSplitter = nCount; O$`UCq } x}$e}8|8YL } 6`\]derSon y%]8'q$ a=GM[{og /* "%8A:^1 **Utility.java A{o 'z_zC */ uQLlA&I" package NetFox; Y^"4?96 m8+(%>+7 l^NC]t public class Utility { vjViX<#(V bm&87 -7'#2P<) public Utility() b'>8ZIY { ;i#LIHJ \9)[#Ld Mj0Cat= } ?SY<~i<K- FYPz 4K //线程睡眠 E(+T* public static void sleep(int nSecond) )&W|QH=AI { ^>~dlS try{ !^U6Z@&/R Thread.sleep(nSecond); {j(4m } X7aXxPCq1 catch(Exception e) 6(56,i<#/ { & %}/AoU e.printStackTrace (); %/0gWG } 2]jPv0u } >L2*CV3p Z$K+
7>^ //日志 ucg$Ed public static void log(String sMsg) g"t^r3 { V*B0lI7`B System.err.println(sMsg); 4".J/I5u } #dJ 2Q_2 .+#Lx;}) Pw}_[[>$ public static void log(int sMsg) KS!yT_O { 993d/z|DX System.err.println(sMsg); f==*"?6\ } 'ND36jHcRD } FuP}Kec ":WYcaSi V> a*3D /* t/:w1rw **TestMethod.java O4+F^+qN */ Rlg#z4m package NetFox; j)D-BK&+ 4e%8D`/=M ^E@@YV public class TestMethod { '_Wt}{h #MTj)P, 5}<[[}( public TestMethod() %<U{K; { ///xx/weblogic60b2_win.exe .Vx|'-u try{ GEE
]Kr SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Fn,k!q //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); vnsSy 33K SiteFileFetch fileFetch = new SiteFileFetch(bean); (DJvi6\H fileFetch.start(); g5R,% 6 } #4y,a_) catch(Exception e){e.printStackTrace ();} A o3HX i>Iee^_( 7Jx%JgF } )*[
""& \REc8nsLy ^pcRW44K public static void main(String[] args) ?iln<%G { @%B4;c new TestMethod(); A^pW]r=Xtk } G]lvHD } wW()Zy0) 点击下载更多相关资料
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