-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* yRdME>_L **SiteFileFetch.java aMq|xHZ */ &:@)roCR package NetFox; |G(9mnZ1 import java.io.*; ba`V`0p- ( import java.net.*; ~9Jlb-*I5 |XV@/ZGl~ 0 v>*P* public class SiteFileFetch extends Thread { .z6"(?~ bsosva+ .?^a|] SiteInfoBean siteInfoBean = null; //文件信息Bean 9]]isE8r long[] nStartPos; //开始位置 OF_g0Zu long[] nEndPos; //结束位置 DnI31!+y FileSplitterFetch[] fileSplitterFetch; //子线程对象 G[4$@{ long nFileLength; //文件长度 #[LnDU8>9 boolean bFirst = true; //是否第一次取文件 yE{(Ebm boolean bStop = false; //停止标志 `{v!|.d< File tmpFile; //文件下载的临时信息 ,e93I6 DataOutputStream output; //输出到文件的输出流 r2 .f8U +#@)C?G,TF //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) QKVFH:"3 public SiteFileFetch(SiteInfoBean bean) throws IOException (fUpj^E)p { T=~D>2C siteInfoBean = bean; _Yqog/sG //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); lXnzomU tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); sngM4ikhs if(tmpFile.exists ()) -qW[.B { UZD Xv=r| bFirst = false; yzH[~O7 read_nPos(); 8x /]H(J } ">
]{t[Ib else \.l8]LH { ?BA~$|lfxu nStartPos = new long[bean.getNSplitter()]; c7R<5f nEndPos = new long[bean.getNSplitter()]; ?P>3~3 B } H5J1j*P<d tX'2 $} dd6m/3uUW 9Z!|oDP- } [!'fE#"a 58>C,+ [19QpK WM public void run() P;7
Y9} { /t=Fx94 //获得文件长度 5S/YVRXq //分割文件 ~A-Y%P //实例FileSplitterFetch yR'%UpaE //启动FileSplitterFetch线程 kl+^0i //等待子线程返回 !=SBeq try{ (_.0g}2 if(bFirst) E#A%aLp0E { D.:6X'hp nFileLength = getFileSize(); aEvW<jHh if(nFileLength == -1) Mq,2S { *{fL t System.err.println("File Length is not known!"); ,B8u?{O } s+a} _a: else if(nFileLength == -2) }Y`D^z~ { _i@4R< System.err.println("File is not access!"); X :wfmb } ~[ZRE @ else E9 6`
aF{] { `SM37({c for(int i=0;i<nStartPos.length;i++) :SJxG&Pm=~ { lFT`
WO nStartPos = (long)(i*(nFileLength/nStartPos.length)); `~;`q } NO'37d for(int i=0;i<nEndPos.length-1;i++) QXLHQ_V { Uz$.sa nEndPos = nStartPos[i+1]; 5u=$m^@{ } /_{B_2i/> nEndPos[nEndPos.length-1] = nFileLength; 7%)KB4(\_ } BH3%dh:9 } u!@(u!Qz yq<mE(hS? J)n^b //启动子线程 Ef2i#BoZ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; sn-P&"q for(int i=0;i<nStartPos.length;i++) ms/!8X$Mz { K|V<e[X[V fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +DwE~l siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), tcD DX'S nStartPos,nEndPos,i); 6i7+.#s Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); JZ>E<U9& fileSplitterFetch.start(); J2avt } W<tw],M-# // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;w(tXcXZ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); DU|>zO% // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", a,`f`;\7N% nEndPos = " + nFileLength); W:S?_JM // fileSplitterFetch[nPos.length-1].start(); ]X\p\n'@j 'MK"*W8QRM 7M, (!*b //等待子线程结束 -POsbb> //int count = 0; eFXQ~~gOj //是否结束while循环 PHU$<> boolean breakWhile = false; 0qp Pz|h ^+k~{F,) #Mm1yXNu while(!bStop) c5- 56Q { {NTMvJLm write_nPos(); DNu-Ce% Utility.sleep(500); HD!2|b~@ breakWhile = true; /{%p%Q[X A(}D76o_ .9VhDrCK for(int i=0;i<nStartPos.length;i++) k^Qd%;bdF { '4e,
e|r if(!fileSplitterFetch.bDownOver) Boj#r ,x { wY xk[)&Y breakWhile = false; *&O4b3R break; <sw fYT!N } @O9wit. } Qr9@e Q1Pp if(breakWhile) hq*"S-N break; uWDWf5@ 4`zK`bRcK# }CGA)yK~3 //count++; PfjD!=yS=h //if(count>4) 8{DW$ZtR // siteStop(); f~P~% } %pj T?G7 zJH:`~GxE tb/`*Yl@ System.err.println("文件下载结束!"); dj2w_:&W } (;cKv catch(Exception e){e.printStackTrace ();} j^6,V\;l } BK)3b6L=% AOv>O52F/Q ]47!Zo, //获得文件长度 6(8zt"E public long getFileSize() ZO8r8
[ { ["0DXm%t int nFileLength = -1; iT=h}> try{ bR*}
s/ URL url = new URL(siteInfoBean.getSSiteURL()); RXw }Tb/D8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &|I{ju_ httpConnection.setRequestProperty("User-Agent","NetFox"); `dJ?j[P,p S5/p3;O\c TR'<D9kn int responseCode=httpConnection.getResponseCode(); 5gKXe4}\/| if(responseCode>=400) zT+ "Z(oz, { <[A;i processErrorCode(responseCode); uFnq 3m^u return -2; //-2 represent access is error ]FEsN6 } [vn"r^P >=K~*$&> (Qd@Q,@(s String sHeader; zn#lFPj12 -'rb+<v Wxzh'c#\8 for(int i=1;;i++) v-&@c { F@<^ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); "Tnmn@ //Utility.log(in.readLine()); 3U4h>T@s| sHeader=httpConnection.getHeaderFieldKey(i); 'k9Qd:a} if(sHeader!=null) Z)!#+m83>- { %TYe]^/'y if(sHeader.equals("Content-Length")) Rja>N)MzBf { '#u=wyp nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 0)Q*u break; qk=OodEMK } Yv"-_ } /E^j}H{ else 1EQLsg`d^ break; ZsN3 MbY } :RDQP } d;v<rw catch(IOException e){e.printStackTrace ();} i?n#ge catch(Exception e){e.printStackTrace ();} <(_${zR C *]XQ1F4 GzjC;+W Utility.log(nFileLength); jwO7r0?\`G #B@*- JlE b return nFileLength; :LLz$[c8 } qJK-HF:# N**"u"CX UQnv#a> //保存下载信息(文件指针位置) ^~W s4[Guo private void write_nPos() d(F4-kBd { tUhr gc try{ p!7(ayu output = new DataOutputStream(new FileOutputStream(tmpFile)); S4D~`"4$/ output.writeInt(nStartPos.length); 8X)1bNGqhe for(int i=0;i<nStartPos.length;i++) ,U=7#Cf! { 1?{w~cF} // output.writeLong(nPos); O#`y;% output.writeLong(fileSplitterFetch.nStartPos); jBU!xCO output.writeLong(fileSplitterFetch.nEndPos); 1i}p?sU } pykRi#[UrX output.close(); V"5LNtf } `o6T)49 catch(IOException e){e.printStackTrace ();} &24>9 catch(Exception e){e.printStackTrace ();} xbsX-F } 15ImwQ (``|5;T\ O6]X\Cwj% //读取保存的下载信息(文件指针位置) dF'oZQz private void read_nPos() ~`<_xIvrq { 23'Ac,{ try{ }u.1$Y DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); A?H.EZ int nCount = input.readInt(); aj}#~v1 nStartPos = new long[nCount];
hD,@>ky nEndPos = new long[nCount]; [-2Tj)P
C for(int i=0;i<nStartPos.length;i++) $o^N_`l { k@Bn}r nStartPos = input.readLong(); #R#|hw nEndPos = input.readLong(); /OeOL3Y } tx]!|x" F input.close(); M[6WcH0/T } \=
Wrh3 catch(IOException e){e.printStackTrace ();} J-W8wCq` catch(Exception e){e.printStackTrace ();} tNYCyw{K } dwz{Yw( crU]P $a YiC_,8A~ private void processErrorCode(int nErrorCode) a3^ ({;k!0 { g>H\"cUv System.err.println("Error Code : " + nErrorCode); X_#,5t=7 } j] U}SN#[* _Sult;y"u //停止文件下载 ^i6`w_ / public void siteStop() XT\Q"=FD { \"l/D?+Q bStop = true; ;w^{PZBg for(int i=0;i<nStartPos.length;i++) Z'_EX7r fileSplitterFetch.splitterStop(); P|;=dX#- (z^987G !N\i9w} } ^\FOMGai } &u0on)E //负责部分文件的抓取 E\XD~ **FileSplitterFetch.java |1UJKJwX */ 92g&,Wb package NetFox; kXW$[R W)2ZeH* T4x[
\v5d import java.io.*; ;{ESo?$* import java.net.*; -](3iPy} NXdT"O=P O*PJr[Zou public class FileSplitterFetch extends Thread { F/U38[ GKf%dKL HKYJgx String sURL; //File URL ,dSP%?vV long nStartPos; //File Snippet Start Position ="s>lI-1a long nEndPos; //File Snippet End Position YHI@Cj int nThreadID; //Thread's ID kcZz WG|n boolean bDownOver = false; //Downing is over 5
DvD boolean bStop = false; //Stop identical FWuk@t[<O FileAccessI fileAccessI = null; //File Access interface i`EG80\[Z qh/}/Sl; EALgBv>#ZL public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException d1n*wVl { kqp*o+Oz', this.sURL = sURL; t"FB}%G this.nStartPos = nStart; 6F08$,%Y this.nEndPos = nEnd;
bj U]] nThreadID = id; j(];b+> fileAccessI = new FileAccessI(sName,nStartPos);//定位
BYXMbx } ;09U*S$eK 7A4_b8 L=<{tzTc public void run() Un{ 9reX5 { k{.`=j while(nStartPos < nEndPos && !bStop) "oo
j; { [:bYd}J lwp(Pq xQ@gh
( ( try{ p$zj2W+sN URL url = new URL(sURL); ys Td'J HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <wO8=bem httpConnection.setRequestProperty("User-Agent","NetFox"); LV$`bZ String sProperty = "bytes="+nStartPos+"-"; 4%,E;fB?= httpConnection.setRequestProperty("RANGE",sProperty); W5zlU2 Utility.log(sProperty); 7Un5Y[FZo E:S (v +G[N
lb InputStream input = httpConnection.getInputStream(); -+Ab[ //logResponseHead(httpConnection); fv?vfI+m Sz'JOBp 8ZvozQE byte[] b = new byte[1024]; H\@@iK= int nRead; i9quP"<9 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^{w]r5d { 6qkMB|@Ix nStartPos += fileAccessI.write(b,0,nRead); 2]/[ //if(nThreadID == 1) =#sr4T // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); }='1<~0 } !(-S?*64l 6A*k $ru()/pI)z Utility.log("Thread " + nThreadID + " is over!"); B kWoK/f4 bDownOver = true; ;&MI
M`&$ //nPos = fileAccessI.write (b,0,nRead); 9|9Hk1 } D+xHTQNTL catch(Exception e){e.printStackTrace ();} sQ>L3F;A` } Gtpl5g QH } Kitx%P`i ]Y@B= 5e/ 2fv`O //打印回应的头信息 % C.I2J`_ public void logResponseHead(HttpURLConnection con) !e0~|8 { ";$rcg"%X for(int i=1;;i++) `UDB9Ca { UgjY String header=con.getHeaderFieldKey(i); t>izcO if(header!=null) j`pX2S //responseHeaders.put(header,httpConnection.getHeaderField(header)); cop \o4ia Utility.log(header+" : "+con.getHeaderField(header)); t?<pyw $ else >V1v.JH break; ;R8pVj!1f } fNTe_akp } )S2GPn7 zxffjz,Fe: "[t (u/e public void splitterStop() ~v+A6N:qC { !w}cKm bStop = true; ^B`*4 } m"y_@Jk 896oz> x vx+a0 A } 27q=~R} c. ;}e:)s 9pJk.Np0 /* J;AwC>N **FileAccess.java ym~ *//文件访问(定位,写) 9yt)9f package NetFox; ?ot7_ vl import java.io.*; "ke>O' VA^yv1We r{pbUk public class FileAccessI implements Serializable{ %SHgXd#X y(w&6: //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 _)U[c;^6 RandomAccessFile oSavedFile; WY)*3? long nPos; ^vA"3Ixb! pni*#W*n S7Tc9"oqV public FileAccessI() throws IOException q{:]D(
{ uKL4cr@ this("",0); j{?ogFfi } MaS"V`NI ,VdNP oZCjci- public FileAccessI(String sName,long nPos) throws IOException a\@k5? { cFF'ygJ/ oSavedFile = new RandomAccessFile(sName,"rw"); {/E_l this.nPos = nPos; Qf:#{~/ oSavedFile.seek(nPos); }S_#*N)i } ^0fe:ac; N" =$S|Gs {)L*\r public synchronized int write(byte[] b,int nStart,int nLen) r-aCa/4y! { ~(~
y=M int n = -1; >o_cf*nx try{ zHu w[ oSavedFile.write(b,nStart,nLen); dum(T n = nLen; n=8DC& } .s8u?1b catch(IOException e) Rxfhk,I { E# UAC2Q e.printStackTrace (); (S)jV0 } ]qPrXuS/ fUV;3du 4Y
`=`{Q return n; W#sCvI@ } =`W#R cf{rK`Ff^ iR39lOr } t8_i[Hw6D dZIruZ)x 5`QN<4?% /* ,E3Ze*(U **SiteInfoBean.java (\o &Gl */ `\Ye:$q package NetFox; [+.P'6/[$R H5X.CcI&} mVVL[z2+ public class SiteInfoBean { -?Kd[Ma ^P~NE#p5 2}xvM"k=k private String sSiteURL; //Site's URL q2}6lf,J
K private String sFilePath; //Saved File's Path ToE^%J4 private String sFileName; //Saved File's Name s.j6"
Q[W private int nSplitter; //Count of Splited Downloading File }F=lG -x MNWuw;:v kB3@;z: public SiteInfoBean() gl>%ADOB@ {//nSplitter的缺省值为5 t^5xq8w8 //default value of nSplitter is 5 8;GuJP\ this("","","",5); E*G{V j } Q)L6+gW^ qfS
]vc_N )FSa]1t;x public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) O;H|nW} { n1r'Y;G sSiteURL= sURL; eccJt sFilePath = sPath; ;!Q}g19C sFileName = sName; 6H'W]T& this.nSplitter = nSpiltter; a*bAf'= \wM8I-f! !v68`l15 } JSu+/rI1 mr<camL5 }
3JOC!;; public String getSSiteURL() ]aI { Q1^kU0M } return sSiteURL; kH" >(f } cTu"Tu\Qw 9?.
r31)Ed$ public void setSSiteURL(String value) 5"mH6%d :8 { kmu r={IR sSiteURL = value; eYD -8* } BVe c Cu`ty] -' &[qJ=HMm I public String getSFilePath() {2T;^+KE { !.@F,wZvY return sFilePath; d$#DXLA\P } ihBIE 9six]T &b9bb{y_$K public void setSFilePath(String value) 1dl(`=^X { y1_z(L;I sFilePath = value; :7[4wQDt4 } 0}qnq" HC(7,3 RI&V:1 public String getSFileName() BI :O?!:9) { qt`HP3J& return sFileName; ~=k?ea/> } Yx':~ NT;cTa=; UoOxGo public void setSFileName(String value) 6~tj"34_ { 4gh`
> sFileName = value; $*c!9Etl4 } ufvjW] DT[WO_= 4`] public int getNSplitter() 6oy[0hj { %6cbHH return nSplitter; \W+Hzf]
W# } 3_N1y >gf,8flgj fir#5,*q| public void setNSplitter(int nCount) Q=h37]U+ { tKYg nSplitter = nCount; {ug* } vpz l{ } V@pUU~6R r:--DKt rp,Us#>6 /* ",P?jgs^g5 **Utility.java GxS!Lk */ 9{CajtN package NetFox; Rh%C$d( $%.,=~W7 ?eDZ-u9) public class Utility { ih(A l<IS 7}puj%JS
/ o,[Em< public Utility() hr`,s!0Y { V<Co!2S "1%\Fi l E'^ny4gL } 0y3C
/>a He1~27+99 //线程睡眠 }gKY_e3 public static void sleep(int nSecond) =kjD ]+l { lu;gmWz try{ @`XbM7D 5 Thread.sleep(nSecond); gf70 O>E } O:Wd
,3_ catch(Exception e) SXx4^X { vDCbD#.6 e.printStackTrace (); DWupLJpk;c } uLr-!T } J~)JsAXAI BFZ\\rN` //日志
t|C?=:_ public static void log(String sMsg) 5?*Iaw { TGuCIc0B{ System.err.println(sMsg); t(1gJZs>kX } T'a& c3(0BSv s:ojlmPb public static void log(int sMsg) YM#J_sy@J. { ]l^"A~va System.err.println(sMsg); zqxN/H]z } lcXo> } `l dQ
Lo,S8( Kl]l[!c7$ /* \qJ cs'D **TestMethod.java Y8for' */ qRXHaQi@9 package NetFox; F]cc?r312 ro8C^d] (@Eb+8Zd public class TestMethod { 6kO+E5;X rges`&0 %'eaW public TestMethod() jvhD_L/ { ///xx/weblogic60b2_win.exe Tsocc5gWZ* try{ h9QQ8}g SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); :=\`P //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); f{U,kCv SiteFileFetch fileFetch = new SiteFileFetch(bean); ?f*>=;7= fileFetch.start(); j-v/;7s/B } Sg1,9[pb catch(Exception e){e.printStackTrace ();} 4%7Oaf>9 8#IEE|1 m5l& } 3v3`d+;& S2?)Sb` 0aGAF ] public static void main(String[] args) x$KQ*P~q { L#fS P new TestMethod(); J]|S0JC` } 3iw.yR } g_)i)V 点击下载更多相关资料
|