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/* _<}oBh **SiteFileFetch.java _X;xW#go */ c'O"</
package NetFox; SI\
O>a9{ import java.io.*; [&eG>zF" import java.net.*; Pg4go10| NpI "XQ B:oE&Ahh{ public class SiteFileFetch extends Thread { _D.4=2@|l8 Bc&Y[u-n a!guZUg6 SiteInfoBean siteInfoBean = null; //文件信息Bean <Ukeq0 long[] nStartPos; //开始位置 >W>3w long[] nEndPos; //结束位置 S3Dmc\f FileSplitterFetch[] fileSplitterFetch; //子线程对象 pm` f?Py long nFileLength; //文件长度 ;2N:
=Rv boolean bFirst = true; //是否第一次取文件 GBSuTu8 boolean bStop = false; //停止标志 wjy<{I File tmpFile; //文件下载的临时信息 CT{mzC8 DataOutputStream output; //输出到文件的输出流 0(qtn9;=2 5LaF'>1yY //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Y+)qb); public SiteFileFetch(SiteInfoBean bean) throws IOException Ky[s&>02 { zt!)7HBo siteInfoBean = bean; '"C& dia //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); XmJ ?oPr7 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); JO-FnoQK if(tmpFile.exists ()) ,4mb05w;d { o#uhPUZ bFirst = false; /JjSx/ read_nPos(); t9~Y
? } yU|=)p5 else SDu%rr7sQ { aOhi<I`* nStartPos = new long[bean.getNSplitter()]; &0x;60b nEndPos = new long[bean.getNSplitter()]; &iO53I^r/ } q~. .Z Y`7 +OaBA>Jh9 U+G8Hs/y fA)4'7UT } E3V_qT8 m^$KDrkD ^XT;n public void run() XyYP!<].C { @rE+H
5 //获得文件长度 3[UaK`/1C //分割文件 \*mKctpz]6 //实例FileSplitterFetch RveEA/&& //启动FileSplitterFetch线程 RDxvN:v //等待子线程返回 a\m0X@Q try{ =zW`+++3 if(bFirst) W~& QcSWqD { Zt \3y nFileLength = getFileSize(); 04c`7[ if(nFileLength == -1) _iH:>2p 5R { {!*dk
V System.err.println("File Length is not known!"); 9w<k1j } o4H' else if(nFileLength == -2) /Py`a1 { 'XI-x[w System.err.println("File is not access!"); ow9Vj$m } m!WDXt else |!cM_& { u vyvy for(int i=0;i<nStartPos.length;i++) DI\^&F)3T2 { $aY:Z_s nStartPos = (long)(i*(nFileLength/nStartPos.length)); Lpk`qJ } G(hzW%P for(int i=0;i<nEndPos.length-1;i++) ^o(C\\>{& { T#3`&[ nEndPos = nStartPos[i+1]; l(3\ekU! } vPsf{[Kr nEndPos[nEndPos.length-1] = nFileLength; yHmNO*(
} ]g]~!": } oF.H?lG7` y^:6D(SR J5zu}U? //启动子线程 i> PKE. fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; wV"C ,*V for(int i=0;i<nStartPos.length;i++) `cqZ;(^ { 2(>=@q.1H fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 89fl\18% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), -hKtd3WbT nStartPos,nEndPos,i); <xAlp;8m5 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); S^ JUQx7 fileSplitterFetch.start(); QW>(LG G= } z1LY|8$G // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), p/?TU siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); % ^&D, // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 0zqTX< A nEndPos = " + nFileLength); B=hJ*;:p // fileSplitterFetch[nPos.length-1].start(); &:Sb$+z >}B~~C; mG+hLRTXP //等待子线程结束 f2FGod<CzN //int count = 0; zNQ|G1o //是否结束while循环 >Av%[G5=h# boolean breakWhile = false; p&(~c/0 2O)2#N
b6gD*w< while(!bStop) 0%5x&vx'S { qYR+qSAJP write_nPos(); me/ae{ Utility.sleep(500); oxL4* bqZ breakWhile = true; AZadNuL/ 4!tHJCq" /pDI
\] for(int i=0;i<nStartPos.length;i++) YK|Y^TU^ { s\i.pd:Q if(!fileSplitterFetch.bDownOver) [EV}P&U { {T[/B"QZG breakWhile = false; YP vg(T break; Y/w) VV } ?4}EhXR( } 1MzOHE if(breakWhile) 7w=%aW| break; yi/jZX q7%eLJ $\@yH^hL //count++; O[fgn;@| //if(count>4) ]]Da/^K=Z // siteStop(); eX>X=Ku } JSQ*8wDcl 4c=oAL ^R4eW|H System.err.println("文件下载结束!"); k6 f;A } |79!exVMBp catch(Exception e){e.printStackTrace ();} <XxFR } `'`T'+0 <~Tlx: i>[1^~; //获得文件长度 jsvD[ \P public long getFileSize() \HOOWaapN { E$[\Fk}S int nFileLength = -1; S:"t]gbF = try{ %.R_[.W URL url = new URL(siteInfoBean.getSSiteURL()); ngN_,x7yc HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); eMvb*X6 httpConnection.setRequestProperty("User-Agent","NetFox"); Z qg(\ b\w88=| :/IcFU~)M int responseCode=httpConnection.getResponseCode(); ]4>[y?k34 if(responseCode>=400) bMD'teJ { ^9UF
Pij" processErrorCode(responseCode); >9g` 9hB return -2; //-2 represent access is error pTK|u!fs } 5yQv(<~*G , &HZvU& c])b?dJ* String sHeader; n]@+<TA<uA }x1mpPND %zyMWC for(int i=1;;i++) Mf&W<n^j { <8At= U //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); v; ;X2 a1k //Utility.log(in.readLine()); puv*p%E sHeader=httpConnection.getHeaderFieldKey(i); "'}v 0*[ if(sHeader!=null) A D}}>v { 22Y!u00D if(sHeader.equals("Content-Length")) lGnql 1( { Zn<(,e nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); (:y,CsR}4 break; 4j@kMe;RjZ } ySuLt@X } zA'gb'MmW else Ef_F#X0# break; L=$?q/=- } 93^(O8. } Hc&uE3=%sL catch(IOException e){e.printStackTrace ();} Xc9p;B>^Ts catch(Exception e){e.printStackTrace ();} <(bCz>o| R%)2(\ iA%'
;V Utility.log(nFileLength); @!&Jgg53G Y( V3PnH K[#v(<) return nFileLength; Qw6KX#n } p-i.ITRS uzVG q!'H I_zk' //保存下载信息(文件指针位置) D*XZT{1g private void write_nPos() g]==!!^<D { 0?6If+AC try{ :?$Sb8OuIL output = new DataOutputStream(new FileOutputStream(tmpFile)); ER;lkF`RF output.writeInt(nStartPos.length); /H%<oAjp6 for(int i=0;i<nStartPos.length;i++) 3I;xU(rv { @`IXu$Wm( // output.writeLong(nPos); z)ft3(! output.writeLong(fileSplitterFetch.nStartPos); clq~ ;hx output.writeLong(fileSplitterFetch.nEndPos); Msv*}^> } /jZaU` output.close(); yUD_w } ~}7$uW0ol catch(IOException e){e.printStackTrace ();} C>Omng1>^ catch(Exception e){e.printStackTrace ();} 2xL!PR- } Mz/]D J8 +gbX}jF0% Q{.{#G //读取保存的下载信息(文件指针位置) 3WO#^}t private void read_nPos() t?]\M&i& { k W<Yda<a try{ pB g|n=^ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); b"R, p=M int nCount = input.readInt(); g+ >=C nStartPos = new long[nCount]; l50|`
6t nEndPos = new long[nCount]; H-/; l54E for(int i=0;i<nStartPos.length;i++) 6m, KL5>W { Ism^hyL nStartPos = input.readLong(); S+) l[0 nEndPos = input.readLong(); ?AeHVQ
:C } PwFQ #Z input.close(); >%uAQiU } :rz9M@7 catch(IOException e){e.printStackTrace ();} p4m^ ~e catch(Exception e){e.printStackTrace ();} 1a($8> } DEUd[ `G=ztL!gq S s@u,`pr private void processErrorCode(int nErrorCode) c N02roQl { ] ?DDCew System.err.println("Error Code : " + nErrorCode); tr6jh=
} 3W7;f! [+g( <mv7HKVg //停止文件下载 ZQ,fm`y\ public void siteStop() #dva0%-1 { E^Q@9C<!d bStop = true; j!zA+hF( for(int i=0;i<nStartPos.length;i++) 4zo4H~@gk fileSplitterFetch.splitterStop(); !Y ;H(.A/ T[5gom P &;y]
,)E } 7ei>L]gm% } L.C
^E7;Z_ //负责部分文件的抓取 U}tl_5%) **FileSplitterFetch.java V,>+G6e */ *'UhlFed package NetFox; D+@-XU<Lp< d&}pgb-Md fH{9]TU_: import java.io.*; Zi 2o import java.net.*; |A ;o0pL {Oy9RESqc =)(3Dp public class FileSplitterFetch extends Thread { 5SoZ$,a<e q+YuVQ-fx SQq6X63 \ String sURL; //File URL 0lX)Cl long nStartPos; //File Snippet Start Position e$CePLEj long nEndPos; //File Snippet End Position qSFc=Wwc int nThreadID; //Thread's ID vVI6m{zYV boolean bDownOver = false; //Downing is over rPRrx-A boolean bStop = false; //Stop identical !UBy%DN~k FileAccessI fileAccessI = null; //File Access interface jP1$qhp O0@w(L- 'M~BE\ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 6OfdD.y { t9G}Yd[T this.sURL = sURL; 5;X {.2 this.nStartPos = nStart; iLF^%!:X% this.nEndPos = nEnd; ~R :<Bw nThreadID = id; 7IA3q{P fileAccessI = new FileAccessI(sName,nStartPos);//定位 z7-`Y9Ypd } k/df(cs
:=rA Yc3] {SF[I public void run() sCVI 2S!L { (7IqY1W while(nStartPos < nEndPos && !bStop) <A)+|Y"^h6 { q^Z~IZ8IT 'Pf_5q -G8c5b[ try{ ,`;jvY~Ec URL url = new URL(sURL); ./#e1m?. HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); NA+&jV httpConnection.setRequestProperty("User-Agent","NetFox"); HV ;; String sProperty = "bytes="+nStartPos+"-"; CXTt(-FT httpConnection.setRequestProperty("RANGE",sProperty); kGpV;F==* Utility.log(sProperty); Ee&hG[sx }<SNO)h3 vKU`C?,L InputStream input = httpConnection.getInputStream(); yc*<:(p //logResponseHead(httpConnection); >B0D/:R9 _)Qy4[S=d -<_7\09 byte[] b = new byte[1024]; ue@8voZhS/ int nRead; +W6Hva. while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ,*7H|de7 { R4V \B nStartPos += fileAccessI.write(b,0,nRead); HzE1r+3Q@ //if(nThreadID == 1) j8pFgnQ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); SC'BmR"ox } !/947Rn DMB"Y, C*7!dW6 Utility.log("Thread " + nThreadID + " is over!"); .AXdo'&2i bDownOver = true; 7U,k 2LS //nPos = fileAccessI.write (b,0,nRead); \yM-O- { } &ik$L!iX catch(Exception e){e.printStackTrace ();} ]pWP?Ws } [Gh"ojt]w } opdu=i=E Qu`n& rnu
e(t //打印回应的头信息 :y\09)CJK public void logResponseHead(HttpURLConnection con) S."7+g7Ar { I0DM=V>; for(int i=1;;i++) hm3jpWi8 { Y~az!8j;Z String header=con.getHeaderFieldKey(i); kBbl+1{H if(header!=null) U h.Sc:trA //responseHeaders.put(header,httpConnection.getHeaderField(header)); 9mQ#L<Ps Utility.log(header+" : "+con.getHeaderField(header)); vXb: else $&IpX M] break; z5 Bi=~=# } _Fizgs } \83sSw
a"QU:<-v =O,JAR"ug public void splitterStop() uArR\k(
{ MHo1 lrZa+ bStop = true; [h4o7 } k5@d! }#c 8a9RML}G< =<{ RX8 } %w7m\nw@ ZW*n /#GUC JvkL37^n: /* u?kD)5Nk **FileAccess.java !qA8Zky_ *//文件访问(定位,写) |z~LzSJv package NetFox; khAqYu") import java.io.*; NhA#bn9y? cn%2OP:L^ 6Nt$ZYS public class FileAccessI implements Serializable{ (;}tf~~r #.<V^ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 6^;^rUlm RandomAccessFile oSavedFile; Zn&k[?;Al long nPos; <qhBc:kc .Pw%DZ' yG&2UqX public FileAccessI() throws IOException S$eDnw~$ { u g\w\b this("",0); Kd3QqVJBz1 } w(BH247` A62<]R)n nJJs%@y public FileAccessI(String sName,long nPos) throws IOException cXN _*% { qX$u4I!, oSavedFile = new RandomAccessFile(sName,"rw"); 5h8o4 this.nPos = nPos; kZVm1W1 oSavedFile.seek(nPos); z/1{OL } EA|k5W*b 0Q~@F3N-\> O"*`'D|hK public synchronized int write(byte[] b,int nStart,int nLen) ni6r{eSQ { 2yKz-"E int n = -1; $%PVJs try{ &[@\ f^~ oSavedFile.write(b,nStart,nLen); :.iyR n = nLen; S &JJIFftO } =MLf[ catch(IOException e) \k@Z7+&7 { dB;3.<S= e.printStackTrace (); "&lN\&: } Z0ReWrl;` ~ y;y(4< jxw_*^w" return n; t`G)b&3_O } :eOR-}p' nrpI5t.b M3pjXc<O } f vLC_'M 4_LQ?U>$ #Qbl=o4 /* '#Dg8/r! **SiteInfoBean.java {J]-<:XD */ PuXUuJx( package NetFox; :Q@)*kQH /smiopFcq G>
\Tbx public class SiteInfoBean { ksWSMxm [vTMS2 q0O&UE)6Y private String sSiteURL; //Site's URL lKKERO5+ private String sFilePath; //Saved File's Path ZA\/{Fw private String sFileName; //Saved File's Name zgKY4R{V private int nSplitter; //Count of Splited Downloading File v-`h>J!Nx dDtFx2(R 9"sDm}5% public SiteInfoBean() t`|,6qEG {//nSplitter的缺省值为5 V U~Dk);Bv //default value of nSplitter is 5 #Hu~}zy this("","","",5); "0&N} } G'x .NL E\{< ;S vR>o}%` public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) z`$J_Cj Y { H4<Nnd\ sSiteURL= sURL; C!%:o/ sFilePath = sPath; ;sPzOS9 sFileName = sName; #[ -\lU| this.nSplitter = nSpiltter; K: r\{#9 *t9eZ!_f? [!"XcFY:a } Q:MhjkOr} lKV"Mh+6 ULBg{e?l8 public String getSSiteURL() UQT'6* ! { Vhg1/EgUr return sSiteURL; mBk5+KyT } ijUzC>O+q :&VcB$ z4M1D9iPY public void setSSiteURL(String value) O}Le]2' { w'ybbv{c sSiteURL = value; =AOWeLk*G } Xl%0/o 9E1W|KE IA*KaX2S< public String getSFilePath() x?r1s#88> { rZwB>c return sFilePath; TGV } S~F` 7#-y-B]l tRfm+hqRZ public void setSFilePath(String value) .FP$ IWt/1 { 5/I_w0 sFilePath = value; 7#2j>G{?]v } >nnY:7m KMjg;!y RKTb'3H public String getSFileName() B0)]s<< { `M@Ak2gcR+ return sFileName; 0 bSA_ } cF+ X,]=6 '$m7ft} =-jD~rN4;P public void setSFileName(String value) N$ alUx* { O/OiQ^T sFileName = value; fA^Em)cs2 } "="O > n:#TOU1ix< 4$"DbaC public int getNSplitter() uV]ULm#,i { *l>0t]5YH return nSplitter; [CN$ScK, } $3P`DJo eD;6okdP _ PWj(}); public void setNSplitter(int nCount) ]/dVRkZeAE { z&+
zl6 nSplitter = nCount; d;G~hVu } @Hjea1@t } 8X7{vN_3K #hxyOq, hWEnn=BW /* H{`{)mS **Utility.java $k2)8 #\ */ w:ULi3 package NetFox; 1B:aC|B O!R"v' N:BL=}V public class Utility { Dpqt;8"2L 2(#Ks's? Dy9\O77> public Utility() <8o(CA\ { Z=$T1| QT!5l` jNl/!l7B } -|_ir-j DJ;g|b //线程睡眠 4tc:. public static void sleep(int nSecond) "S!3m9_# { <Gb
%uny try{ 'Z8aPHD Thread.sleep(nSecond); >1|g5 } -q>^ALf|@> catch(Exception e) fEnQE EU~P { nkY@_N e.printStackTrace (); !,&yyx. } X>l*v\F9 } G*n2Ii j$@tK0P //日志 `rFAZcEj% public static void log(String sMsg) mP}#Ccji? { wD9a#AgEd System.err.println(sMsg); KS<Jv; } xAdq+$>< d>i13dAI Z`_.x
&Y public static void log(int sMsg) h'5Cp(G { W)=%mdxW0 System.err.println(sMsg); Fvl`2W94; } h%}(h2W } <[Oo*:A!7 z;3NiY ]|Z b\{
/* 9O98Q6-s **TestMethod.java <@#PF$! */ w G!u+ package NetFox; b-<HXn_Fd W{Q)-y pj{\T?( public class TestMethod { =_d%=m ]H[8Z|i"" /9 hR public TestMethod() k
onoI&kV| { ///xx/weblogic60b2_win.exe l(kr'x try{ P:!)9/.2 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); C7qYiSv //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); S*t%RZ~a SiteFileFetch fileFetch = new SiteFileFetch(bean); h=+$>_&: fileFetch.start(); 4ke^*g
K< } q-AN[_@ catch(Exception e){e.printStackTrace ();} t1i(;|8| [xaisXvI4 L\ j: } uofLhy! $kz!zjC' Fb_S&! public static void main(String[] args) 2CLB1 { Zhi})d3l new TestMethod(); U}AX0*S } WH$HI/%*m } 5cTY;@@ 点击下载更多相关资料
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