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/* {[lx!QF 8& **SiteFileFetch.java ~=Fk/ */ ~QO<
B2hS} package NetFox; .Nk6 import java.io.*; *V<)p%l. import java.net.*; F]0Jwm{ WS5"!vz -BjEL; public class SiteFileFetch extends Thread { &gJW6< 6ku8`WyoF d}pGeU' SiteInfoBean siteInfoBean = null; //文件信息Bean F*.
/D~K long[] nStartPos; //开始位置 \CDAFu# long[] nEndPos; //结束位置 P 4H*jy@? FileSplitterFetch[] fileSplitterFetch; //子线程对象 aYR\ <02 long nFileLength; //文件长度 9Mnem* boolean bFirst = true; //是否第一次取文件 CP@o,v- boolean bStop = false; //停止标志 n }TTq6B File tmpFile; //文件下载的临时信息 eoC<a"bJ> DataOutputStream output; //输出到文件的输出流 qb9}&'@: yq!CWXZ2 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ~6MMErSj public SiteFileFetch(SiteInfoBean bean) throws IOException (w}r7`n { do*Wx2:R siteInfoBean = bean; $Q#?`j //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 37~rm tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ^Jn|*?+l if(tmpFile.exists ()) <BQ%8} { %{Xm5#m bFirst = false; c.\:peDk read_nPos(); VDPxue } g8Ok ^ else A?\h|u< { D`8E-Bq nStartPos = new long[bean.getNSplitter()]; s^obJl3 nEndPos = new long[bean.getNSplitter()]; I?A~zigO } 1RURZoL ?DJuQFv l#mtND3 ]}5`7 } Q-:Ah:/ _AVy:~/ +V6j` public void run() rknzo]N, { Qz'O{f //获得文件长度 J&( //分割文件 EWSr@}2j
. //实例FileSplitterFetch ws#hhW3qK //启动FileSplitterFetch线程 l
DgzM3 //等待子线程返回 KX]-ll try{ R,uJK)m if(bFirst) Wn b)*pPP { hcj{%^p nFileLength = getFileSize(); {E3;r7 if(nFileLength == -1) 4;08n|C { ='KPT1dW* System.err.println("File Length is not known!"); CzK%x?~] } :u,2"] else if(nFileLength == -2) X5|?/aR} { 4GEjW4E System.err.println("File is not access!"); jBT*~DyN
z } w6%l8+{R else 5/*)+ { <Wp`[S]r for(int i=0;i<nStartPos.length;i++) 9Y;}JVS { A[K:/tB nStartPos = (long)(i*(nFileLength/nStartPos.length)); G1,Ro1 } q=T<^Tk#e for(int i=0;i<nEndPos.length-1;i++) ^.nwc# { ?SBh^/zf nEndPos = nStartPos[i+1]; 9
Wxq) } ytg7p 5{!i nEndPos[nEndPos.length-1] = nFileLength; =B 1`R%t } .n?5}s+q } D86K$IT ~Ay S^*(ALFPj //启动子线程 >eTf}#s?S fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; <t% Ao," for(int i=0;i<nStartPos.length;i++) Fj'\v#h { Rh5@[cg% fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), h;&&@5@lM siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 0;.e#(`- nStartPos,nEndPos,i); [RroHXdk+ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); h}Fu"zK fileSplitterFetch.start(); Yk(NZ3O } wI|bBfd( // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), jJiCF,m siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); g`y/_ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", eW<!^Aer nEndPos = " + nFileLength); E;ndw/GZjR // fileSplitterFetch[nPos.length-1].start(); (\5<GCW- qg/Y;tGSx pmE1EDPag //等待子线程结束 $u/8Rp //int count = 0; W+fkWq7`Xx //是否结束while循环 zW|$x<M^ boolean breakWhile = false; LA( f]Xmc XyN`BDFi _p3WE9T while(!bStop) cx,u2~43A& { ,i1 fv
" write_nPos(); 9 ayH:; Utility.sleep(500); O% j,:t'" breakWhile = true; So3,Z'z= Cf8R2(-4 lk5_s@V
l for(int i=0;i<nStartPos.length;i++) $\=6."R5< { w+:+r/!g if(!fileSplitterFetch.bDownOver) #)IdJ] { f?oI'5R41 breakWhile = false; L>|A6S#y8/ break; fh/)di } wFH(.E0@Q } XmE_ F if(breakWhile) nJnO/~| break; *GY,h$Ul ^^W`Lh%9 dW] Ej"W //count++; "' LOaf$X //if(count>4) tFb|y+ // siteStop(); k;9#4^4( } O;.d4pO(tC I+-Rs2wb 4.$hHFqS^5 System.err.println("文件下载结束!"); |G5=>W } ?L.p9o-S0 catch(Exception e){e.printStackTrace ();} #oS } vM$#m1L? Xqq?S (rCPr,@0 //获得文件长度 pD)/-Dgdm public long getFileSize() W"DxIy { JN9H T0 int nFileLength = -1; lVO(9sl*i try{ 0o\=0bH&s URL url = new URL(siteInfoBean.getSSiteURL()); J0{WqA.P HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); G/^5P5y%@ httpConnection.setRequestProperty("User-Agent","NetFox"); 'SXpb?CZ "1\RdTw /-cX(z
7 int responseCode=httpConnection.getResponseCode();
A*?/F:E if(responseCode>=400) *PA1iNdKS { lqwJ F & processErrorCode(responseCode); WHh2fN'A5 return -2; //-2 represent access is error UBpM8 /U } (,Zz&3
AV 1[,#@!k@ R _~m\P String sHeader; YQw/[ `XRb:d^ KfN`ZZ< for(int i=1;;i++) Yqj.z| }Nb {
\1c`) //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); zke~!"iq //Utility.log(in.readLine()); _*-'yu8# sHeader=httpConnection.getHeaderFieldKey(i); N*c?Er@8U if(sHeader!=null) oBGst t@ { *~MiL9m+? if(sHeader.equals("Content-Length")) X_Of k { EKI+Dq, nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); qhHRR/p break; ag*Hs<gi } Toa#>Z*+Rb } 0DP%44Cv 9 else Aghj) V break; _s#/f5<:B } LKwUpu! } &t@6qi`d catch(IOException e){e.printStackTrace ();} 8aIq#v catch(Exception e){e.printStackTrace ();} jL[Is2<@
;Bc<u[G 9h{:!
Utility.log(nFileLength); t+Q|l&|0 r
z>zdj5} Y+5A2Z)f[ return nFileLength; #+5mpDh
} )}g4Rvr `cTsS A0 w `o //保存下载信息(文件指针位置) (2a"W` private void write_nPos() M#gGD- { `E1_S try{ "Z1&z- output = new DataOutputStream(new FileOutputStream(tmpFile)); >ehWjL`8 output.writeInt(nStartPos.length); }sN9QgE for(int i=0;i<nStartPos.length;i++) 0jx~_zq-j { fgz'C? // output.writeLong(nPos); uvc{RP output.writeLong(fileSplitterFetch.nStartPos); <38@b
]+ output.writeLong(fileSplitterFetch.nEndPos); 7ump:| } #j~FA3O output.close(); jH#^O;A } R5~vmT5W catch(IOException e){e.printStackTrace ();} ;ZW}47:BS6 catch(Exception e){e.printStackTrace ();} >[3,qP]E } 88LbO(q\d OgpH{" .}u(& //读取保存的下载信息(文件指针位置) =D:R'0YH private void read_nPos() 7&S|y]$~ { )-:f;#xJ try{ g 5YsVp DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); *,=+R$ int nCount = input.readInt(); q\Io6=39x nStartPos = new long[nCount]; #;KG6I E nEndPos = new long[nCount]; Nb,H8; for(int i=0;i<nStartPos.length;i++) )|1JcnNSa { D0_x|a nStartPos = input.readLong(); g(F*Y>hk nEndPos = input.readLong(); h],%va[ } ReGb.pf input.close(); /8-VC" } 2dlV'U_g catch(IOException e){e.printStackTrace ();} .KMi)1L) catch(Exception e){e.printStackTrace ();} 4oEq,o_ } u$ / ]59 jtOsb91c} Oh85*3 private void processErrorCode(int nErrorCode) UA u4x 7 { L5P}%1 _ System.err.println("Error Code : " + nErrorCode); w0`L)f5v } wk7_(gT`0 h+d;`7Z> g.sV$.T2K //停止文件下载 ^XB8A=xi public void siteStop() Zkep7L
{ :[rKSA]@ bStop = true; #$^i x for(int i=0;i<nStartPos.length;i++) V# %spW fileSplitterFetch.splitterStop(); 8`?j*FV7kq &1C9K> 7CN[Z9Y^} } ZUI\0qh+ } QKkr~?sTO //负责部分文件的抓取 p?NjxQLA **FileSplitterFetch.java L/+J|_J) */ JF\viMfR package NetFox; 7%FZXsD e9~4wt 5WN Z7cO import java.io.*; ^"#rDP"v import java.net.*; :NyE d<' YD.^\E4o :|mkI#P. public class FileSplitterFetch extends Thread { ~F6gF7]z 4gNRln- tLXw&hFk`g String sURL; //File URL 4'=N{.TtO long nStartPos; //File Snippet Start Position ._nKM5. long nEndPos; //File Snippet End Position >o=p5#{ int nThreadID; //Thread's ID EQhV}9 boolean bDownOver = false; //Downing is over #C7j|9Ew1] boolean bStop = false; //Stop identical CXFAb1m FileAccessI fileAccessI = null; //File Access interface oVsazYJ|? e[dRHl aM}"DY-_
h public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException vj$6 { twS3J)UH this.sURL = sURL; 0qUap*fvC this.nStartPos = nStart; 1}M.}G2u/ this.nEndPos = nEnd; meD (ja nThreadID = id; m
=F@CA~C fileAccessI = new FileAccessI(sName,nStartPos);//定位 =eLb"7C#0 } OYy !4Fp 'U0I.x( 3pH`]m2 public void run() A:J{ { Xkm2C) while(nStartPos < nEndPos && !bStop) -d)n0)9 { !QspmCo+ dkp[?f)x -{%''(G try{ tP{$}cEY URL url = new URL(sURL); 291|KG HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Y"%o\DS* httpConnection.setRequestProperty("User-Agent","NetFox"); \ \}/2#1=c String sProperty = "bytes="+nStartPos+"-"; `\0a5UFR httpConnection.setRequestProperty("RANGE",sProperty); K! j*:{ Utility.log(sProperty); qE:DJy< AAY UXY! Z!eq / InputStream input = httpConnection.getInputStream(); cN>i3}fq //logResponseHead(httpConnection); =Q/>g6 I*2rS_i[T #L$ I%L" byte[] b = new byte[1024]; xB+H7Ya int nRead; [wG%@0\ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ljON_* { hyoZh Y nStartPos += fileAccessI.write(b,0,nRead); `{_PSzM //if(nThreadID == 1) 34:EpZO@ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 0M98y!A 5^ } a $%[!vF uy:=V}p <J`xCm K Utility.log("Thread " + nThreadID + " is over!"); elB 8 bDownOver = true; Zw{tuO7}K //nPos = fileAccessI.write (b,0,nRead); ;BVhkWA } (*BW/.Fq catch(Exception e){e.printStackTrace ();} =7,UqMl_ } /vMyf),2 } XCriZ|s 3~la/$?p0 b15qy? `y //打印回应的头信息 j #YFwX4. public void logResponseHead(HttpURLConnection con) J@iN':l- { 4pT|r6!< for(int i=1;;i++) ;#j82 { ]l%.X7M9 String header=con.getHeaderFieldKey(i); qQvb;jO if(header!=null) -rlX<(pl) //responseHeaders.put(header,httpConnection.getHeaderField(header)); -`EoTXT*U Utility.log(header+" : "+con.getHeaderField(header)); cvfAa#tq> else p]eD@3Wz break; V+z)B+ } AoeW<}MO } &N0|tn v2sU$M a6P.Zf7 public void splitterStop() 7`!( 8 { qKC*jDW bStop = true; NkI: } $ :wM'&M ![^h<Om hM w`e } o+TZUMm c"1d#8J @D=`iG% /* 7d)' y **FileAccess.java eUlb6{!y? *//文件访问(定位,写) W<o0Z OO package NetFox; qH"a ! import java.io.*; -+|[0hpw v1)6")8o+ {E|gV9g public class FileAccessI implements Serializable{ +~O{
UGB= LP /4e` //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 fM.|#eLi RandomAccessFile oSavedFile; A!yLwkc:5 long nPos; ze)K-6SKH {fD#= v19`7qgR( public FileAccessI() throws IOException 2zu~#qU[)M { d
4R+gIA this("",0); e~?]F0/ } J7o?h9 Xs@ ^D, 5V!XD9P' public FileAccessI(String sName,long nPos) throws IOException 12dW:#[ { |"v{RC0 oSavedFile = new RandomAccessFile(sName,"rw"); :`1g{8.+ this.nPos = nPos; eCD,[At/ oSavedFile.seek(nPos); HC,@tfS } [bJnl>A G[j79o ]M;! ])b$ public synchronized int write(byte[] b,int nStart,int nLen) 7:'>~>' { c F]3gM int n = -1; =lQ[%& try{
5AU3s oSavedFile.write(b,nStart,nLen); bz]O(` n = nLen; oW6<7>1M7 } !H\GHA'DO] catch(IOException e) .+h
pxZ { Qpf]3 e.printStackTrace (); kH-b! } 0u2uYiE-l yVzg<%CR^ :G/]rDtd return n; 4+,Z'J%\[7 } T]-~?;Jh8 [)vwg`] Cq;d2u0)o$ } J?fh3RW9 ygt)7f5 >]8.xkQq /* 5N<v'6&= **SiteInfoBean.java Z"Ni
Y */ i]%"s_l package NetFox; olxP`iK
Nn1^#kc RGI6W{\ public class SiteInfoBean { F6VIH( \ZZy`/~z*7 @$K q<P private String sSiteURL; //Site's URL o{W]mr3D private String sFilePath; //Saved File's Path FH`&C*/F0Y private String sFileName; //Saved File's Name ?I#hrv@ private int nSplitter; //Count of Splited Downloading File
WPKTX,k @6'E8NFl #2ASzCe public SiteInfoBean() '$-,;vnP0 {//nSplitter的缺省值为5 pY#EXZ# //default value of nSplitter is 5 ;XQ lj?: this("","","",5); z}&C(m:al } BM~niW;k ^T6!z^g1h FD+PD:cQn public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) TFDCo_>o { }h h^U^ia sSiteURL= sURL; [=3tAPpzK sFilePath = sPath; pF+wHMhUe sFileName = sName; +J8/,d this.nSplitter = nSpiltter; 9$@ g;?}Ps q%Jy>IXt yUwgRj } bTp2)a^G a;(zH*/XK JM lhBh public String getSSiteURL() \[I . { %kFELtx return sSiteURL; - :z5m+ } 4@iJ|l kS#DKo q)xl$*g public void setSSiteURL(String value) v|2q2 bz { m{dyVE sSiteURL = value; (jMAa% } Cf=q_\0|W E816YS=' _s-HlE?C public String getSFilePath() 5po'(r|U { e0WSHg=6@ return sFilePath; |aAWWd5 } =C>`}%XT} zQ %z"tQ 2*wO5v public void setSFilePath(String value) >fA@tUQB { \"`>-v"h sFilePath = value; UAXF64w{ } `pd 7e{X$' SA+%c)j29 public String getSFileName() L[Yp\[#-q { {F+M&+`` return sFileName; s?x>Yl
% } 'BdmFKy1 oT (:33$ 0mD;.1: public void setSFileName(String value) hi
D7tb=g~ { m|2]lb sFileName = value; $<
K)fbG } hN:F8r+DG 5ZyBP~ Zjic"E1 public int getNSplitter()
UQ.D!q { [q+e]kD return nSplitter; H@2"ove-uC } j_'rhEdLP @f5@0A\0 :&0yf;>v public void setNSplitter(int nCount) :{i$2\DH6 { bqQO E4; nSplitter = nCount; { .3 } @Gn?8Ur% } VXc+Wm*W j*La,iF 9oz (=R /* NBqV0>vR **Utility.java gAr`hXO */ |;.Pj3)- package NetFox; q
5v?`c *)`kx :m++ iR public class Utility { TcKvSdr' `zzKD2y FSU%?PxO public Utility() gF,[u { !&a;P,_Fb -q&7J'
N .qIy7_^ } 6_%]\37_Z 2l)9Lz=;L //线程睡眠
7edPH3 public static void sleep(int nSecond) KM6N'x ^z { Y1fy2\<' try{ @k+%y'Y? Thread.sleep(nSecond); 4P4 Fo1 } Q$fRi[/L catch(Exception e) *TM;trfz { ksu}+i,a e.printStackTrace (); #6N+5Yx_[ } `*" H/QG } (zs4#ja2, p2Dh3)& //日志 <g3du~ public static void log(String sMsg) rQcRjh+E
H { mWli}j# System.err.println(sMsg); ~&DB!6* } a/QtJwIV /UpD$,T|^| ~MhgAC public static void log(int sMsg) 2JiAd*WK { !EX?m }7 System.err.println(sMsg); QY~<~<d+G } U/X|i / } ePq13!FC/ cebs.sF: gV"qV /* `dv}a-Q)c **TestMethod.java /ojO>Y[< */ Sa;<B:| package NetFox; t;.^K\S4 @K$VV^wp %@lV-(5q public class TestMethod { Lj&1K~U n5Nan
:!JpP
R5 public TestMethod() _{LN{iqDv { ///xx/weblogic60b2_win.exe yn/?=
?0 try{ I*A0?{ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 'yPCZ`5H( //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); c=A(o SiteFileFetch fileFetch = new SiteFileFetch(bean); 9Fy\t{ks fileFetch.start();
""1#bs{n } bBUbw *DF) catch(Exception e){e.printStackTrace ();} lAdDu 1B)Y;hg6& 7P<r`,~k- } w]>"'o{{ 8K\'Z tZaD ${ public static void main(String[] args) { OB-J\7Y { +}_Pf{MW new TestMethod(); J [ YtA } |SGgy|/a# } (Wd_G-da 点击下载更多相关资料
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