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/* '
>R?8Y **SiteFileFetch.java -fCR^`UOS */ Zb}U 4 package NetFox; `b?o%5V2x import java.io.*; ^bG91"0A import java.net.*; wlsq[xP -"uOh,G} 3}kG ]# public class SiteFileFetch extends Thread { _2
oZhJ L~|_C Rw |e{ ^Yf4 SiteInfoBean siteInfoBean = null; //文件信息Bean []b=
xRJM long[] nStartPos; //开始位置 r%\%tz'`j
long[] nEndPos; //结束位置 $q*hE&x
Qd FileSplitterFetch[] fileSplitterFetch; //子线程对象 ~1:_wni long nFileLength; //文件长度 7.FD16 boolean bFirst = true; //是否第一次取文件 7&&3@96<*# boolean bStop = false; //停止标志 AjD?_DPc File tmpFile; //文件下载的临时信息 P"f4`q
DataOutputStream output; //输出到文件的输出流 -an~&C5\ sZPyEIXie //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) *BHp?cn;F2 public SiteFileFetch(SiteInfoBean bean) throws IOException o@sL/5, { +vt?3i\^. siteInfoBean = bean; i F \H //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 21[=xboU tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); of8
>xvE| if(tmpFile.exists ()) =z zmz7op { nxMZd=Y bFirst = false; c2Wp 8l read_nPos(); lk.Mc6) } r;_*.|AH else 4Z.Dz@.c( { -QK- w> nStartPos = new long[bean.getNSplitter()]; wvRwb nEndPos = new long[bean.getNSplitter()]; 4JRQ=T|P7I } 08+\fT [ tMH2 c 5 `74g f4Ob4ah!( } OlP1Zd/l -"rANP-UI Vsr"W@k_ public void run() *!pn6OJ"Q} { De2$:? //获得文件长度 o)n=n!A //分割文件 ZCuo YE$g //实例FileSplitterFetch <99/7># //启动FileSplitterFetch线程 4~Y?*|G]m //等待子线程返回 nNf*Q
r%Z try{ |
{Q}:_/q if(bFirst) ~OWpk)Vq { DMOP*;Uk nFileLength = getFileSize(); (/FG#D. if(nFileLength == -1) h>F"GR?U_( { Rg^ps System.err.println("File Length is not known!"); 1@i/N } "'C5B>qO else if(nFileLength == -2) ~E/=nv$ {
h_]*|[g System.err.println("File is not access!"); djqw5kO:R } G[6i\Et else ~~=]_lwyK% { oJQ
\?~ for(int i=0;i<nStartPos.length;i++) t)= dKC { [RY Rt/?Q nStartPos = (long)(i*(nFileLength/nStartPos.length)); [] el4.J, } xz,o Mlw for(int i=0;i<nEndPos.length-1;i++) 10)RLh|+ { @1xIph<z nEndPos = nStartPos[i+1]; !^o{}*]Pi } e^,IZ{ nEndPos[nEndPos.length-1] = nFileLength; ;+.cD } yZN~A: } `<kB/T +prUau* _8!x //启动子线程 7&9w_iCkV fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ?rA3<j for(int i=0;i<nStartPos.length;i++) c&N;r|N { Nukyvse fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), tfu`_6 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), b^&azUkMN nStartPos,nEndPos,i); *l;S"}b*,_ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); b(CO7/e> fileSplitterFetch.start(); #oR`_Dm)P } g"k4Z // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), a
9{:ot8, siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); `SOQPAnK+; // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ^*.+4iHx nEndPos = " + nFileLength); 4HR36=E6 // fileSplitterFetch[nPos.length-1].start(); ![nL/ G.^)5!By '2hy% //等待子线程结束 m Rm}7p //int count = 0; (wu ciKQ //是否结束while循环 c~O
Lr boolean breakWhile = false; Tl'wA^~H 4/k`gT4
D~BL Txq while(!bStop) FRajo~H { 8|<</v8i write_nPos(); M nZljB Utility.sleep(500); )Tp"l"(G breakWhile = true; 7(uz*~Z?`0 S89j:KRXH% vd(S&&]o1 for(int i=0;i<nStartPos.length;i++) Jwfb%Xge~ { 9<&M~(dwT4 if(!fileSplitterFetch.bDownOver) M.
%
p'^5 { @/|g|4 breakWhile = false; 4}k@p>5v' break; aL*MC gb' } %OB>FY:| } F8dr-"G if(breakWhile) Du65>O break; =}kISh 5>+@.hPX r~YBj>} //count++; 4H%#Sn#L^! //if(count>4) &M<"Fmn // siteStop(); H#D:'B j29 } :9ia|lN
D_0sXIbg )W>$_QxbN System.err.println("文件下载结束!"); egSs=\ } j5" L catch(Exception e){e.printStackTrace ();} A{J?I: } mRRZ/m?A( E:B"!Y6 Y'~O_coG //获得文件长度 m BFNg3_ public long getFileSize() Anu: { Khi;2{` int nFileLength = -1; t0e5L{ QJ try{ _s#]WyU1g URL url = new URL(siteInfoBean.getSSiteURL()); %(p9AE HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )mf|3/o httpConnection.setRequestProperty("User-Agent","NetFox"); R&;x_4dr^ nRB3VsL &'&)E(( int responseCode=httpConnection.getResponseCode(); mj e9i if(responseCode>=400) K mH))LIv { k<Gmb~Tg1 processErrorCode(responseCode); .=Oww return -2; //-2 represent access is error EjFpQ|-L| } P ?f${t+ ><D2of| YR0AI l:L String sHeader; au+Jz_$) >I5Wf/$ 1!G}*38; for(int i=1;;i++) HQ9tvSc { h[iO'Vq //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); vJGH8$%;, //Utility.log(in.readLine()); -O?HfQ sHeader=httpConnection.getHeaderFieldKey(i); ]58~b%s if(sHeader!=null) !`H{jwH { PkyX,mr#1 if(sHeader.equals("Content-Length")) OYt_i'Q { =,;$d*h nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ejyx[CF break; EG qu-WBS } )#M$ov } %i3[x.M else X$\CC18 break; 8%u|[Si; } 6M7GPHah } TA/hj>rV catch(IOException e){e.printStackTrace ();} YYFS
({ catch(Exception e){e.printStackTrace ();} n:wAxU i0wBZ i? u;H^4}
OQ Utility.log(nFileLength); dtY8>klI +u=VO#IA# !2HF|x$ return nFileLength; 5lD`qY } K<::M3eQ j*|0#q;e6 am3.Dt2\ //保存下载信息(文件指针位置) G)[gLD{g? private void write_nPos() 6c(b*o { =J)-#|eZG try{ ,7s+-sRG output = new DataOutputStream(new FileOutputStream(tmpFile)); ^pu8\K;~ output.writeInt(nStartPos.length); PR!0=E*} for(int i=0;i<nStartPos.length;i++) x?B`p"ifS { v)O].Hd // output.writeLong(nPos); n(# yGzq output.writeLong(fileSplitterFetch.nStartPos); }z/%b<o_ output.writeLong(fileSplitterFetch.nEndPos); CfS;F } vv2[t output.close(); ^4,LIIUj } >r(`4M: catch(IOException e){e.printStackTrace ();} ndDF(qHr catch(Exception e){e.printStackTrace ();} G#` } gV9bt~ 'j{o!T0 w{ _g"X //读取保存的下载信息(文件指针位置) NQuqM`LSQ private void read_nPos() T zS?WYF { 0/|Ax-dK try{ p`\>GWuT! DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); o[eZ"}~ int nCount = input.readInt(); P"}"q ![ nStartPos = new long[nCount]; F?FfRzZ[ nEndPos = new long[nCount]; XefmC6X for(int i=0;i<nStartPos.length;i++) lcEK&AtK { 3rHn? nStartPos = input.readLong(); hg<[@Q%$o nEndPos = input.readLong(); ; }T+ImjA } KrG,T5 input.close(); cVMRSp } >L "+8N6 catch(IOException e){e.printStackTrace ();} FAc^[~E catch(Exception e){e.printStackTrace ();} hW!n"qU } aY.cx1" P'}B5I~ stW
G`>X private void processErrorCode(int nErrorCode) ='+I dn#5 { -(lP8Y~gFY System.err.println("Error Code : " + nErrorCode); 9I<~t@q5e@ } >/ A'G m`$Q/SyvG 0,@^<G8? //停止文件下载 u&TXN;I,p public void siteStop() b3 =Z~iLv { !J@!2S9 bStop = true; b]xoXC6@ t for(int i=0;i<nStartPos.length;i++) [iO8R-N8d fileSplitterFetch.splitterStop(); kQd|qZ=:w /|H9Gm ^LB] } %*Mr ^= } :Ru8Nm //负责部分文件的抓取 +zLw%WD[l **FileSplitterFetch.java n=$ne2/ */ KDGrX[L:6 package NetFox; J}8p}8eF, "zXrfn rMjb,2*rC7 import java.io.*; )Qe]!$tqfD import java.net.*; `T1bY9O. {5c?_U 2.MUQ;OX public class FileSplitterFetch extends Thread { BgdUG:;&
*
]bB7 J#i7'9g String sURL; //File URL A! HJ
long nStartPos; //File Snippet Start Position cbm;45 L| long nEndPos; //File Snippet End Position puWMgvv int nThreadID; //Thread's ID (>x05nh boolean bDownOver = false; //Downing is over mDbTOtD boolean bStop = false; //Stop identical Z^4+ 88 FileAccessI fileAccessI = null; //File Access interface +'olC^?5 } 5}]+|d; $2i@@#g8 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException NR
k~ { > 3(,s^ this.sURL = sURL; oZ tCx this.nStartPos = nStart; ceCO *m~ this.nEndPos = nEnd; zG 9D
Ph nThreadID = id; Rj>A", fileAccessI = new FileAccessI(sName,nStartPos);//定位 Q#qfuwz } 2?Jw0Wq5D qsbo"29 ;A7JX:*?y= public void run() \**j\m { A]i!131{w| while(nStartPos < nEndPos && !bStop) i}v.x { g<0K
i^# 4\v &8">LL leH7II9 try{ 6G"UXNa, URL url = new URL(sURL); eh]syeKBj HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); g.hYhg'KUh httpConnection.setRequestProperty("User-Agent","NetFox"); y1PyH String sProperty = "bytes="+nStartPos+"-"; w"dKOdY httpConnection.setRequestProperty("RANGE",sProperty); e_KfnPY
Utility.log(sProperty); Jx}-Y*
o C:5d/9k Lkx~>U
InputStream input = httpConnection.getInputStream(); c};%VB //logResponseHead(httpConnection); YOGj__: +M_ _\7 _&S#;ni\c byte[] b = new byte[1024]; { ,c*OR int nRead; _ ~\} fY while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) `m<O!I"A { `kQosQV nStartPos += fileAccessI.write(b,0,nRead); J-dB //if(nThreadID == 1) AzXLlQ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 1@KiP`DA } >Q=^X3to XJ3sqcS breF,d$ Utility.log("Thread " + nThreadID + " is over!"); QNU~G3 bDownOver = true; msfE; //nPos = fileAccessI.write (b,0,nRead); YuknZ&Q } LPJ7V`!k catch(Exception e){e.printStackTrace ();} FV
"pJ } HV/:OCK } U6@c)_* < |> ]@w\] r \ft{Z<P //打印回应的头信息 yFDeYPZP public void logResponseHead(HttpURLConnection con) mWaij]1> { Ri" hU/H{ for(int i=1;;i++) LiT%d { >rEZ$h String header=con.getHeaderFieldKey(i); Sf*v#? if(header!=null) \'j(@b, //responseHeaders.put(header,httpConnection.getHeaderField(header)); Z@+nkTJ9&t Utility.log(header+" : "+con.getHeaderField(header)); A3_p*n@ else zQY ,}a break; /ie&uWy } k"i3$^v8 } m-
<y|3 K}@rte !9/`PcNIpy public void splitterStop() +8//mrL_/ { ^{MqJ\S7H bStop = true; 4DCh+|r } lgU!D |v xE<H@@w E! NtD).=S } Gr2}N"X= ,6g{-r-2 (X"5x]7] /* "crR{OjE" **FileAccess.java 9#:nlu9 *//文件访问(定位,写) ?Cf'IBpN package NetFox; ?; W"=I*3 import java.io.*; d5gwc5X La1:WYt _j, Tc*T public class FileAccessI implements Serializable{ [#gm[@d, PDD2ouv4 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 l.pxDMY RandomAccessFile oSavedFile; VX.LL
5 long nPos; &EV%g6 YM_ [ fW2NYQP$: public FileAccessI() throws IOException o!UB x<4 { 2: gh q this("",0); G)<B7-72; } h7E?7nR :.g/=Q(T~ ]j7`3%4uK public FileAccessI(String sName,long nPos) throws IOException &qXobJRM { OoA!N-Q oSavedFile = new RandomAccessFile(sName,"rw"); S&UP;oc this.nPos = nPos; rogy`mh\r2 oSavedFile.seek(nPos); jnp~ACN, } O.Pp*sQ^ n+=qT$w) %W D^0U| public synchronized int write(byte[] b,int nStart,int nLen) .c]>*/(+ { 1<m`38' int n = -1; GZaB z#U try{ tjThQ oSavedFile.write(b,nStart,nLen); Fj<*!J$, n = nLen; +g?uvXC& } ?X|q catch(IOException e) $Be hU { -b!Z(}JK e.printStackTrace (); VCc=dME } 7#j.yf4 k
?KJ8 =|AYT6z, return n; k#pO+[ x } If'2
m_ B\R X 1#3|PA#> } (^iF)z
RP{0+ 0e0)1;t\ /* ~-vCY **SiteInfoBean.java A3tv'-e9 */ b|.Cqsb package NetFox; O#;sY`fy_M f$^wu~ w.58=Pr public class SiteInfoBean { O'(Us!aq ;8PO}{rD RN 4?]8 private String sSiteURL; //Site's URL %`k [xz private String sFilePath; //Saved File's Path &G_#=t& private String sFileName; //Saved File's Name :y7K3:d3 private int nSplitter; //Count of Splited Downloading File !dwZ` D M>5OC)E |*JMPg?zI public SiteInfoBean() hO[_ _j8 {//nSplitter的缺省值为5 KE"6I //default value of nSplitter is 5 AJ6l#j- this("","","",5); ?xv."I% } TO89;O (U#,; nuWQ3w
p[e public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) wi+Qlf { ?3K~4-!?/ sSiteURL= sURL; tf 7HhOCYX sFilePath = sPath; [ x+-N7 sFileName = sName; ]@Y!,bw& this.nSplitter = nSpiltter; Wap4:wT 'gor*-o:wu 7xO05)bz } ^_3Ey x[};x;[ZE *cM=>3ws/ public String getSSiteURL() 75p9_)>96 { \Y"S4<"R return sSiteURL; %T>@Ldt } I~F&@ iCpm^ XT |MKR&%Na public void setSSiteURL(String value) ;taZixOH { 7.VP7;jys sSiteURL = value; VRY(@# q } |DW^bv XdDQ$'*X CC!`fX6z>h public String getSFilePath() PTe$dPB { 3HXeBW return sFilePath; Eh;Ia6} } V0m1>{ <-N eusx% p'^}J$ public void setSFilePath(String value) j%3$ytf|p { ESoqmCJjb: sFilePath = value; yxx_%9 X } Bn8&~ W20- oZ8 >.P*lT public String getSFileName() n1|]ji[c { l+6@,TY1U return sFileName; M6MxY\uM } o/,%rA4 ,e$RvFB D_<B^3w) public void setSFileName(String value) yD3vq}U! { sCy.i/y sFileName = value; Bz,D4E$ } O<!^^7/h0 6C.!+km nUONI+6Z/ public int getNSplitter() |af<2(d { PNLlJlYlP return nSplitter; YVRE9 } w0js_P-uv 4ybOK~z $(J)F-DB i public void setNSplitter(int nCount) _kOuD}_| { Y
uZ nSplitter = nCount; 9|>y[i } jj `0w@ } 7 je1vNs c?xeBC1- P'_ aNU /* {XhpxJ__ **Utility.java VasQ/ */ Dh{P23} package NetFox; :1iXBG\ .
VI
# ~c1~)QzZ public class Utility { /KvpJ4 a3Z()|t> jAt65a public Utility() n!b*GXb\ { mn<ea& &:+_{nc, rUiUv(q } _x#r,1V+D ~ C_2D? //线程睡眠 4f0dc\$ public static void sleep(int nSecond) '?fn} V { 78b9Sdi& try{ &zP\K~Nt Thread.sleep(nSecond); tK <)A) } KRcg catch(Exception e) v#IZSBvuQK { `+r5I5 e.printStackTrace (); IZ4jFgpR } 8J9o$Se } R?%|RCht1 inGH'nl_ //日志 ~u-`L+G"6 public static void log(String sMsg) h"nv[0!) { 0$nJd_gW_ System.err.println(sMsg); U`'w{~"D% } CV7.hF< z!j`Qoh?V9 WHF:>0B public static void log(int sMsg) }KkH7XksF { F{<rIR System.err.println(sMsg); }@A~a`9g } .~8IW,[ } :Ws3+OI'm3 Nb{oH +$b qm}7w3I^ /* 55|$Imnf **TestMethod.java g(;ejKSR */ N=L
urXv package NetFox; 7~`6~qg. 17qrBG-/MD ck<4_?1] public class TestMethod { K<_H`k*x ;6)|'3.B9 CnA*o 8w public TestMethod() 7y`~T+ { ///xx/weblogic60b2_win.exe &c@I4RV|q try{ ZNA?`Z)f SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5);
p|bpE F=U //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); +Q_Gm3^ SiteFileFetch fileFetch = new SiteFileFetch(bean); L_Ai/' fileFetch.start(); Ri-wbYFaP } $S cjEG:6 catch(Exception e){e.printStackTrace ();} ->#7_W @o^sp|k ! "|&*MjwN6 } XJ NKM~ C,z]q$4 YGn:_9 public static void main(String[] args) F;NZJEy { ,zyrBO0 Eq new TestMethod(); bo"I:)n; } IH0^*f } 9VY_gi=vL 点击下载更多相关资料
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