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/* D`V6&_.p **SiteFileFetch.java : @s8?eg */ +:}kZDl@ X package NetFox;
T:c7@^= import java.io.*; ex.+'m<g import java.net.*; &8Zeq3~ T0g0jr{ j0AwL7 public class SiteFileFetch extends Thread { }|AX_=a L?C\Q^0"`G |Es0[cU SiteInfoBean siteInfoBean = null; //文件信息Bean U> W|(Y long[] nStartPos; //开始位置 (viWY long[] nEndPos; //结束位置 =ntftSH FileSplitterFetch[] fileSplitterFetch; //子线程对象 j(&GVy^;? long nFileLength; //文件长度 HB%K|&!+ boolean bFirst = true; //是否第一次取文件 QQ*gFP.Ao boolean bStop = false; //停止标志 6j_ 678 File tmpFile; //文件下载的临时信息 miwf&b DataOutputStream output; //输出到文件的输出流 aXC!t B@d1xjp)'] //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) M/*Bh,M` public SiteFileFetch(SiteInfoBean bean) throws IOException
*K`x;r { (m6EQoW^s+ siteInfoBean = bean; Hyf"iYv+ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3be6p tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); RZ*<n$#6 if(tmpFile.exists ()) # ?_#!T| { nQ|GqU\oA bFirst = false; $Tfm/ =e read_nPos(); )W#T2Z>N1 } 18jJzYawh else 5Wo5n7o { YDW|-HIF nStartPos = new long[bean.getNSplitter()]; jg?bf/$s nEndPos = new long[bean.getNSplitter()]; s}s|~ } 3eWJt\}?B 2H6:np|O \/n+j! 7vw;Egd@@- } ~)_K"h.DY ti}f&w
ICJ DjY8nePyE public void run() MBlBMUJk { 2R\+} //获得文件长度 7"#f!.E //分割文件 d)\2U{ //实例FileSplitterFetch |88CBiu} //启动FileSplitterFetch线程 uj)yk* //等待子线程返回 ubi~% try{ 55^tfu if(bFirst) W8y$Ve8m { r|<6Aae& nFileLength = getFileSize(); r5[4h'f if(nFileLength == -1) 6s5yyy=L%~ { +^Fp&K+^ System.err.println("File Length is not known!"); c+~LpSQ } >:%BNeO else if(nFileLength == -2) #,TELzUVE { -;vT<G3 System.err.println("File is not access!"); )y`i@S}J } x7HA722w else ]W;:|/,c { *U_S1>0n for(int i=0;i<nStartPos.length;i++) =PZWS&(L { pcnl0o~ nStartPos = (long)(i*(nFileLength/nStartPos.length)); oXdel
Ju? } =MxpH+spI for(int i=0;i<nEndPos.length-1;i++) j|mv+O { Z&-tMai; nEndPos = nStartPos[i+1]; _W}(!TKO } XC2FF&B& nEndPos[nEndPos.length-1] = nFileLength; (vnoP< 0
} C s#w72N } NCn`}QP "H$@b`) \ADLMj`F| //启动子线程 L:pUvcAc? fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; O>%$q8x@i for(int i=0;i<nStartPos.length;i++) m<3w^mww { tvGlp)?. fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), []gRfM]$& siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 2QL?]Vo nStartPos,nEndPos,i); \sITwPA[z Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); dZDK7UL fileSplitterFetch.start(); Z%OW5]q } b)`pZiQP // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >Mw'eQ0(y siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); }vY.EEy! // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 7E\g
&R. nEndPos = " + nFileLength); T)~!mifX // fileSplitterFetch[nPos.length-1].start(); -=a[J;'q #|?8~c;RWG (0R2T"/ //等待子线程结束 Im+7<3Z //int count = 0; e1UITjy //是否结束while循环 f3vF"O boolean breakWhile = false; BPewc9RxV P$OUi!" v%nP*i9 while(!bStop) $''UlWK { 1x{kl01m% write_nPos(); G|*G9nQ Utility.sleep(500); XXm'6xD- breakWhile = true; xNIGO/uI~ #A )Ab%r8" 7]Rk+q2: for(int i=0;i<nStartPos.length;i++) -=mwy { VE$t%QT if(!fileSplitterFetch.bDownOver) 6@YH#{~Zpv { g YUTt breakWhile = false; 7 >bMzdH break; $w/E9EJ)3A } +>}o;`hPe } R$d7\nBG if(breakWhile) P#;Th8k{K2 break; 1'fb
@vO y42#n =)
}nLS3t //count++; %Kl(>{N //if(count>4) /[{auUxSX // siteStop(); I .P6l*$ } `*k@4.J{ 'Wp@b678 \0&SI1Yp System.err.println("文件下载结束!"); ?4[NNL } RB;BQoGX catch(Exception e){e.printStackTrace ();} o(fy d)t } fEwifSp. =$&&[& qrE0H //获得文件长度 !iJipe5 public long getFileSize() :c:V%0Yji { .&|L|q} int nFileLength = -1; (NaK3_ try{ "V}qf3qU URL url = new URL(siteInfoBean.getSSiteURL()); J@Yj\9U HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); v2>Z^ httpConnection.setRequestProperty("User-Agent","NetFox"); #&BS
?@ s[X
B#)H4 x.UaQ |F int responseCode=httpConnection.getResponseCode(); #xp(B5 if(responseCode>=400) m9t$h { U&W"Ea=R/ processErrorCode(responseCode); `0@z"D5c return -2; //-2 represent access is error YlKFw|= } Y.-S=Y T5e^J" q.T:0| String sHeader; H,K`6HH JC2*$qu J B;W(iI for(int i=1;;i++) X 8R1a? { L!y"d!6C //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); GTAf //Utility.log(in.readLine()); (a#pvEY sHeader=httpConnection.getHeaderFieldKey(i); Yt{&rPv, if(sHeader!=null) Y;_T=L { -Qb0:]sV# if(sHeader.equals("Content-Length")) J\A8qh8 { A ~&+F>Z nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); X"<|Z]w break; Ep ">v>" } JA6";fl; } :<utq|#s else IU9,
(E break; _#pnjo } 1~Mn'O% } y6%<zhs catch(IOException e){e.printStackTrace ();} ;?~
9hN! catch(Exception e){e.printStackTrace ();} '[0YIn Pa&4)OD 9g]M4*?C9P Utility.log(nFileLength); 1<,/
-H lT,+bU s
MZ[d\ return nFileLength; mH\@QdF } BS2?!;,8 Oy$<QXj/ S(t{&+Wc //保存下载信息(文件指针位置) +tUQ private void write_nPos() 2f..sNz { 9XOyj5 try{ z<<Tk.65 output = new DataOutputStream(new FileOutputStream(tmpFile)); Gru ALx7 output.writeInt(nStartPos.length); c;!9 \1sr for(int i=0;i<nStartPos.length;i++) 3.),bm { 4f {+pf^R // output.writeLong(nPos); c0[k T output.writeLong(fileSplitterFetch.nStartPos); Zi{0-m6+ output.writeLong(fileSplitterFetch.nEndPos); ^73=7PZ } AP w6 output.close(); {ERjeuDm] } e{!vNJ0` catch(IOException e){e.printStackTrace ();} H(> M catch(Exception e){e.printStackTrace ();} Zi4d] } =DMbz`t 28oJFi] UvBnf+, //读取保存的下载信息(文件指针位置) ug&92Hdvy3 private void read_nPos() XeU<^ [ { 8R4qU!M try{ Sk=N [hwU DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); w~N-W8xNR int nCount = input.readInt(); jdlG#j-\ nStartPos = new long[nCount]; mHs:t{q nEndPos = new long[nCount]; &yLc1#H for(int i=0;i<nStartPos.length;i++) O?E6xc<8 { TSQhX~RN nStartPos = input.readLong(); Tl3"PIb nEndPos = input.readLong(); 6K 4+0xXv } YoAg input.close(); f:vD`Fz1 } RIjM(P catch(IOException e){e.printStackTrace ();} D]u=PqHk2 catch(Exception e){e.printStackTrace ();} *P xf#X }
#T"64%dX 9L"?wv ;BVDt private void processErrorCode(int nErrorCode) * nCx[ { I?M@5u System.err.println("Error Code : " + nErrorCode); ^'W%X } x+^Vg3 q 4_Y!el H) 5;Ia$lm=y //停止文件下载 %6i=lyH- public void siteStop() `~nCbUUee { =]b9X7} bStop = true; 61:9(*4~!F for(int i=0;i<nStartPos.length;i++) C3.=GRg~l fileSplitterFetch.splitterStop(); |Fp'/~|w2d v[L[A3`"/ P)1EA; } HNMBXXf,B } 6"%2,`Nu //负责部分文件的抓取 \h#9oPy **FileSplitterFetch.java (\&
62B1 */ Vp7b4n< package NetFox; Fu##'# @L8;VSI Z4@y?fv7s import java.io.*; xA-jvu9@ import java.net.*; =4> @8=JA OX3Xy7 %?dE{ir public class FileSplitterFetch extends Thread { e5OVq
, *"T+G*~ |Puj7Ru String sURL; //File URL 0jTMZ<&zZ long nStartPos; //File Snippet Start Position j_c+.iET long nEndPos; //File Snippet End Position e &Rb int nThreadID; //Thread's ID vgAFuQi( boolean bDownOver = false; //Downing is over 5/(sjMB boolean bStop = false; //Stop identical sam[s4@eQ FileAccessI fileAccessI = null; //File Access interface -'ZxN'*%
V16%Ne 61,O%lV public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 6[+j'pW? { PbN3;c3 this.sURL = sURL; {AgBwBCE this.nStartPos = nStart; ,qu:< this.nEndPos = nEnd; s41adw> nThreadID = id; ]-Lruq# fileAccessI = new FileAccessI(sName,nStartPos);//定位
mn`5pha } y5%5O xB m1y `v" +{*)}[w{x public void run() 5rN7':(H!% { Gh+f1)\FA" while(nStartPos < nEndPos && !bStop) r?$&Z^ { JV%nH!Fs zq=&4afOE
JWWInuH try{ U'M|=I' URL url = new URL(sURL); Bac| ;+L~L HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %rXexy!V httpConnection.setRequestProperty("User-Agent","NetFox"); ArX]L$D String sProperty = "bytes="+nStartPos+"-"; yxY
h?ka httpConnection.setRequestProperty("RANGE",sProperty); 'M-)Os" Utility.log(sProperty); vv*
|F l7~Pa0qD }5hZo%w[n InputStream input = httpConnection.getInputStream(); 6>uQt:e //logResponseHead(httpConnection); U!NI_uk kQ[Jo%YT?E |Eu*P byte[] b = new byte[1024]; mtX31M4 int nRead; Gw`/.0 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) c_DaNEfaY { i'iO H|s nStartPos += fileAccessI.write(b,0,nRead); g-|Kyhr?= //if(nThreadID == 1) Z9f/-|r5 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); NfqJ=9 }
I1i:}g/ "$P'Wv g/B\ObY Utility.log("Thread " + nThreadID + " is over!"); v^\JWPR/ bDownOver = true; DZ2Fl>7 //nPos = fileAccessI.write (b,0,nRead); f-&ATTx`J } cdDY]"k catch(Exception e){e.printStackTrace ();} SctJxY(}! } $>![wZ3 } SdSgn |S bq: [Nj n{$}#NdV //打印回应的头信息 TH>,v public void logResponseHead(HttpURLConnection con) =-m(\} { XD
5n]AL for(int i=1;;i++) OOfyGvs { []=_<]{ String header=con.getHeaderFieldKey(i); T;J7+0 if(header!=null) $)f"K //responseHeaders.put(header,httpConnection.getHeaderField(header)); i0b.AA Utility.log(header+" : "+con.getHeaderField(header)); !YY6o
V else {dBB{.hX break; ^8Z@^M&O" } ]2PQ X4t0 } eX@v7i,} "&Gw1.p U Q)!|@& public void splitterStop() R~$hWu}} { &M$Bt} < bStop = true; yYM_lobn } ^?nP$+gq !*5_pGe %6N)G!P } S7Znz@ blUY.{NN3 drbe#FObX /* "A]?M<R **FileAccess.java o:H'r7N
*//文件访问(定位,写) 5
>'66gZ package NetFox; 3hH>U%`- import java.io.*; hcQSB00D^ 9@Q&B+! X:U=MWc> public class FileAccessI implements Serializable{ u |'8a1 k?<i*;7 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ma1(EJ/ RandomAccessFile oSavedFile; #s*k|
j} long nPos; }iMXXXBOT xUIvLH= We\KDU\n public FileAccessI() throws IOException IeH^Wm&^ { X=JFWzC this("",0); J0Jr
BXCh } k&yQ98H$K" UmYD] 1E8$% 6VV public FileAccessI(String sName,long nPos) throws IOException /9P^{OZ;y { A0S8Dh$ oSavedFile = new RandomAccessFile(sName,"rw"); 6={IMkmA this.nPos = nPos; RXUA!=e oSavedFile.seek(nPos); 7,f:Qi@g } PBCb0[\ YXgWH'i~ tc"T}huypU public synchronized int write(byte[] b,int nStart,int nLen) )ni"qv~J { q)NXyy4BT int n = -1; DQ%`v= try{ c!.=%QY oSavedFile.write(b,nStart,nLen); 0h^uOA; c n = nLen; vf6`s\6 } 5QKRI)XpZ catch(IOException e) mlD%d!. { 15o9CaQw4" e.printStackTrace (); :DDO= } y:~eU G aha Z
F oN_S}o
return n; #,t2*tM } P`7ojXy uijq@yo8- /g13X,.H } n'q
aR<bY $I\))*a d:A\<F /* +d.u##$ **SiteInfoBean.java rFf:A-#l */ hJecCOA)' package NetFox; >9 q]>fJ G!nl'5|y mp!YNI public class SiteInfoBean { 3Wjq >\ km9Gwg/zT SRP5P,- y private String sSiteURL; //Site's URL nWKO8C> private String sFilePath; //Saved File's Path "(Mvl1^BT private String sFileName; //Saved File's Name >s;oOo+5 private int nSplitter; //Count of Splited Downloading File izXbp02 ${wU+E* Y,3z-Pa=@ public SiteInfoBean() u9esdOv {//nSplitter的缺省值为5 Dq{:R //default value of nSplitter is 5 ~&t!$ this("","","",5); { k
kAqJ } lt }r}HM+ h1n*WQ- J>><o:~@ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Q1aHIc
{ lq; sSiteURL= sURL; /7c2OI=\ sFilePath = sPath; mk#>Dpy? sFileName = sName; r3n=<l!Jr this.nSplitter = nSpiltter; UAnB=L,.\
fn4= 5T~3$kuO } s;vWR^Ll 98X!uh' ?lu_}t] public String getSSiteURL() d-9uv|SJ { kEp.0wL' return sSiteURL; X(4s;i } <]Ij(+J; FgXu1- 2 9&sydu public void setSSiteURL(String value) ^wvH,>Yo { Gtj( sSiteURL = value; CkmlqqUHC } xR\D(FLVS z8
hTZU 99\{! W public String getSFilePath() D=jSh { Q2JdO 6[96 return sFilePath; RpBiE8F4 } AM>Yj p>2|| j)g_*\tQ public void setSFilePath(String value) i58ZV`Rk` { 5W*7qD[m sFilePath = value; 17J} uXA } 4JX`>a{< vpZu.#5c 1"8Z
y6t public String getSFileName() `4q5CJ2 { 43vGgGW return sFileName; \4[c}l } )B-MPuB ^VSt9& KC@k9e public void setSFileName(String value) Fpy6"Z?z { ^n\9AE3 sFileName = value; AZh@t?) } utYnaeQcn P5'iYahCq_ XkM s public int getNSplitter() i_j9/k { b:N^Fe return nSplitter; ioE66-n } +)/Rql(lY 08TaFzP81 !!?+M @ public void setNSplitter(int nCount) Y|{r
vBKjf { -ET*M< nSplitter = nCount; $=e&q } u=p ;A1oy } W?*Xy6",JF aukk|/3Ih w.4u=e >Z4 /* \zk?$'d **Utility.java :FX'[7;p */ +-Z"H) package NetFox; OaD
Alrm MgJ%26TZ 3a'Rs{qxn
public class Utility { v#Cz&j W0+gfg 37j\D1Y public Utility() eT7!a']x { ?z \q Mu F&W0DaH .ujs`9d_- } \_*?R,$3Y, S5:"_U //线程睡眠 |i,zY{GI+2 public static void sleep(int nSecond) OqfhCNAY { Bo\a try{ ^ l]]qdNr Thread.sleep(nSecond); =:xV(GK} } 'Z*\1Ci catch(Exception e) u)q2YLK8 { e3yorQ][ e.printStackTrace (); 5PPPd-'Z_ } e.)yV'%L } }};j2 1kB'sc3N! //日志 x&hvFG3 public static void log(String sMsg) Hrd5p+j { OPvj{Dv$0 System.err.println(sMsg); jRv;D#Hp } ?~VWW<lR -Z`( ?
k 6=Y3(#Ddt public static void log(int sMsg) c]AKeq] { mhHA!:Y System.err.println(sMsg); rd&*j^? } EmtDrx4!(f } U~u6}s]: dCf'\@<< Bo](n*i /* p`E|SNt/W **TestMethod.java f"5lOzj`C */ &y#\1K package NetFox; ^]#Ptoz^(l [OFTP#}c Pi&fwGL public class TestMethod { B|]t\(~$[ ,(@Y%UW: Dg9--wI}I9 public TestMethod() ;Zx K3/(7 { ///xx/weblogic60b2_win.exe rQd1Ch try{ boC>N SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); h3UZ|B0= //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Gx(K N57D SiteFileFetch fileFetch = new SiteFileFetch(bean); wf~5lpI[ fileFetch.start(); :,h=2a_ 8 } {<-
ouD catch(Exception e){e.printStackTrace ();} Ak\D6eHcB 7':5
%KabyvOl) } sx)$=~o E>l#0Zw `'G),{ j public static void main(String[] args) ^G'yaaLXR { haEZp6Z new TestMethod(); *#prSS } \28b_,i+ } ~# h E&nq 点击下载更多相关资料
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