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/* #gh
p/YoTq **SiteFileFetch.java /7bw: h; */ $ye^uu;Z package NetFox; ||uZ bP@ import java.io.*; ;}LJh8_ import java.net.*; Oqpp=7 I(pb-oY3!I vXephR' public class SiteFileFetch extends Thread { '/k^C9~m
r $^t<9"t 8QV t,
'I SiteInfoBean siteInfoBean = null; //文件信息Bean +p3 Z#KoC long[] nStartPos; //开始位置 |K%}}g[<e; long[] nEndPos; //结束位置 sf`PV}a1 FileSplitterFetch[] fileSplitterFetch; //子线程对象 a\=-D: long nFileLength; //文件长度 =f>HiF boolean bFirst = true; //是否第一次取文件 }mKwFVZ boolean bStop = false; //停止标志 (Akd8}nf~ File tmpFile; //文件下载的临时信息 t\8&*(&3F DataOutputStream output; //输出到文件的输出流 Z|
We9% 1!!\+
c2* //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) MSl&?}Bj public SiteFileFetch(SiteInfoBean bean) throws IOException ~;[&K%n { c15r':.5 siteInfoBean = bean; I:i<>kG //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); L1wZU, o tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ym\(PCa5` if(tmpFile.exists ()) l7z6i*R { z>G;(F2 bFirst = false; SG:bM7*1' read_nPos(); $Z ]z } c`
,
2h# else nd:E9: { <c+K3P'3? nStartPos = new long[bean.getNSplitter()]; ]*3:DU nEndPos = new long[bean.getNSplitter()]; D{cZxI } `}gdN}; 0z7L+2#b^ o2aM#Q
T1W:>~T5# } y])).p P \0ov[T N.> Fnb2.R'+ public void run() v0#*X5C1' { F~6#LT //获得文件长度 ;wR 'z$8 //分割文件 b:kXNDc //实例FileSplitterFetch 44HiTWQS?l //启动FileSplitterFetch线程 ong""K4H //等待子线程返回 J
R$r!hX try{ -Wc~B3E| if(bFirst) \G>ZkgU { Gf0,RH+ nFileLength = getFileSize(); {U"^UuU] if(nFileLength == -1) x6;j<m5Mjx { 3F+Jdr' System.err.println("File Length is not known!"); $*\L4<( } ghAi{@s$) else if(nFileLength == -2) brSi< { eEl.. y System.err.println("File is not access!"); ~e">_;k6 } 8;8c"'Mn else e;VIL 2| { }$kQs!# for(int i=0;i<nStartPos.length;i++) A&,,9G< { h2w}wsb0l nStartPos = (long)(i*(nFileLength/nStartPos.length)); Bs8[+Ft5 } j U[
O for(int i=0;i<nEndPos.length-1;i++) r-IT(DzkD { E4i0i!<z nEndPos = nStartPos[i+1]; l!
v!hUb+ } &(blN.2 nEndPos[nEndPos.length-1] = nFileLength; yGj.)$1},@ } U#
JIs } zhblLBpeE\ ?LaUed' L]d-33.c!H //启动子线程 <rIz Z'D fileSplitterFetch = new FileSplitterFetch[nStartPos.length];
Paj vb-f for(int i=0;i<nStartPos.length;i++) @=Fi7M { zj|WZ=1*Wp fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), jrMe G.e=D siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), l= }~v nStartPos,nEndPos,i); 'ZP)cI:+X Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); g(ogXA1 fileSplitterFetch.start(); %|"g/2sF[G } W# US#<9Y // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), fc_2D| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Ts$@s^S] // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", X"aEJ|y nEndPos = " + nFileLength); I+(/TP // fileSplitterFetch[nPos.length-1].start(); k1
-~ <Fz~7WVd \e3`/D //等待子线程结束 ANi)q$:{ //int count = 0; {aYY85j //是否结束while循环 Gi2$B76< boolean breakWhile = false; zj{r^D$ &>g'$a<[ .;7> y7$* while(!bStop) 5ETip'<KT6 { Ro(Zmk\t write_nPos(); &opd2 Utility.sleep(500); eLD|A=X? breakWhile = true; rjx6Djo>
D L'iS aGZi9O7G} for(int i=0;i<nStartPos.length;i++) \55VqGyxu9 { =ONHKF[UJ if(!fileSplitterFetch.bDownOver) yp.[HMRD { 2i{cQ96 breakWhile = false; 1BHG'y break; b75$?_+ } u+H;
@ } WI> P-D if(breakWhile) b89a)k>^g break; e= vsuqGT 6z0@I* `
|IUGz //count++; 7{@l%jx][ //if(count>4) ZK;z m // siteStop(); c9qR'2 } bHLT}x/Gw 8K(Z0 gKLyL]kAGz System.err.println("文件下载结束!"); M-)RQ-h } tZ`Ts}\e catch(Exception e){e.printStackTrace ();} ~lNsa".c } zZcnijWb K~=UUB O$/o'"@ / //获得文件长度 xx{!3 F public long getFileSize() n1
6 `y} { Twn4lG4~ int nFileLength = -1; 7dsefNPb try{ H ]4Hj URL url = new URL(siteInfoBean.getSSiteURL()); dL7E<?l HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 1I@8A>2^OX httpConnection.setRequestProperty("User-Agent","NetFox"); s,#>m*Rh qW:HNEiir `.s({/|[ int responseCode=httpConnection.getResponseCode(); gs!(;N\j| if(responseCode>=400) ,h"- { 4DZ-bt' processErrorCode(responseCode); ifN64`AhRX return -2; //-2 represent access is error `u>4\sv } g&/T*L 'y8]_K* rZ8`sIWQt String sHeader; WAdCF-S lHgs;>U$ )K &( for(int i=1;;i++) %p%%~ewmx { y;/VB,4V //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); z5ij(RE] //Utility.log(in.readLine()); RKPO#qju\F sHeader=httpConnection.getHeaderFieldKey(i); 6@DF if(sHeader!=null) A}eOFu`
{ RX/hz| if(sHeader.equals("Content-Length")) pz"0J_xDM { $D G?M6 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); pK0"%eA break; P.gb1$7< } \rv<$d@L } '],J$ge else <[w=TdCPs break; Ub6jxib } -GxaV #{ } 6j
~#[ catch(IOException e){e.printStackTrace ();} AK@9?_D catch(Exception e){e.printStackTrace ();} %c4Hse#Y
O({2ivX l\i)$=d&g Utility.log(nFileLength); 9T<x& d3xmtG {i h$2</J" return nFileLength; V:y'Qf2M } !r<pmr3f@7 s0vDHkf8 8i2n;LAz //保存下载信息(文件指针位置) VVlr*` private void write_nPos() =i[\- { q@{Bt{$x try{ %^jMj2 output = new DataOutputStream(new FileOutputStream(tmpFile)); X(NLtO
w output.writeInt(nStartPos.length); 'dn]rV0(C for(int i=0;i<nStartPos.length;i++) OGl}-kw { \.-bZ$ // output.writeLong(nPos); we//|fA< output.writeLong(fileSplitterFetch.nStartPos); ^eY!U%. output.writeLong(fileSplitterFetch.nEndPos); y@S$^jk. } SaO}e output.close(); -V77C^()8d } iy.p n catch(IOException e){e.printStackTrace ();} G"qvz{* catch(Exception e){e.printStackTrace ();} {L{o]Ii?g } _}Ac n$ =7=]{Cx[ oq
Xg //读取保存的下载信息(文件指针位置) 5uGq%(24 private void read_nPos() nfbR
P t { GY'%+\*tj try{ #jvtUS \ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); hR?{3d#x2 int nCount = input.readInt(); Mq156TL nStartPos = new long[nCount]; hn
GZ= nEndPos = new long[nCount]; PJ|P1O36a for(int i=0;i<nStartPos.length;i++) m e$Z~/Akm { AlaW=leTe nStartPos = input.readLong(); 5{X<y#vAC0 nEndPos = input.readLong(); {UI+$/v# } y%cP1y) input.close(); hE D}h![ } g
wRZ%.Cn catch(IOException e){e.printStackTrace ();} `r6 ,+& catch(Exception e){e.printStackTrace ();} UcHJR"M~c } Rsm^Z!sn Vx u0F]% tCH!my_ private void processErrorCode(int nErrorCode) rpha!h>w1% { q"lSZ;
'E System.err.println("Error Code : " + nErrorCode); -=Q*Ml#I } +5*95-;0 >1Ibc=}g )D7m,Wi+ //停止文件下载 D%pF;XY public void siteStop() `4J$Et%S { K\Wkoi5 bStop = true; iOghb*aW for(int i=0;i<nStartPos.length;i++) Rr]Hy^w fileSplitterFetch.splitterStop(); tX s\R(?T k1~&x$G cOJo3p;& } jvL[
JI,b } NH4# //负责部分文件的抓取 IHac:=*Q **FileSplitterFetch.java rglXs */ ~q.F<6O package NetFox; p8O2Z?\ $7ZX]%<s x|Bf-kc[#Q import java.io.*; +~$ ]}% import java.net.*; !wVM= z^G <iC(`J$D j</: WRA`] public class FileSplitterFetch extends Thread { g*_& %ntRG! /$?}YL, String sURL; //File URL Xl#ggub? long nStartPos; //File Snippet Start Position A?P_DA long nEndPos; //File Snippet End Position r),kDia int nThreadID; //Thread's ID IOmfF[ boolean bDownOver = false; //Downing is over .t!x<B boolean bStop = false; //Stop identical +I|vzz`ZVr FileAccessI fileAccessI = null; //File Access interface KkbD W3- 7Ovi{xd@ ^jZbo{ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Ow,w$0(D { [RhO$c$[\ this.sURL = sURL; |/{=ww8| this.nStartPos = nStart; SY\ gXO8k this.nEndPos = nEnd; ",; H`V nThreadID = id; qo bc<- fileAccessI = new FileAccessI(sName,nStartPos);//定位 *.t7G } .W!i7 (hbyEQhF O_7|C\] public void run() VY4yS*y { _]H&,</ while(nStartPos < nEndPos && !bStop) aEeodA<( { Z@!+v19^ e*NnVys /nA{#HY try{ YN F k URL url = new URL(sURL); <PH#[dH HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 5U$0F$BBp httpConnection.setRequestProperty("User-Agent","NetFox"); ]N?kG`[ String sProperty = "bytes="+nStartPos+"-"; ^u ~Q/4 httpConnection.setRequestProperty("RANGE",sProperty); 0aB;p7~& Utility.log(sProperty); igPX#$0XU W^l-Y%a/o oZ|\vA%4^ InputStream input = httpConnection.getInputStream(); z<?)Rq" //logResponseHead(httpConnection); )jP1or fuySN!s 2c*GuF9(0 byte[] b = new byte[1024]; BRiE&GzrF int nRead; '~=SzO while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) /a4{?? #e { 4|DWOQ': nStartPos += fileAccessI.write(b,0,nRead); (O3nL. //if(nThreadID == 1) -uf|w? // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [7Oe3= } UP,c | %7+qnH*;r zK@@p+n_#. Utility.log("Thread " + nThreadID + " is over!"); H G^'I+Yn bDownOver = true; &Z%?!.4j@ //nPos = fileAccessI.write (b,0,nRead); jNk%OrP] } l]8uk^E catch(Exception e){e.printStackTrace ();} VMWf>ZU } pW3^X=6 } 6j}9V
L77 4,DeHJjAlE }5"u[Z. //打印回应的头信息 Lp9E:D-> public void logResponseHead(HttpURLConnection con) UJ
{ k{-Cwo for(int i=1;;i++) vEJbA { Q*Pq{]0K String header=con.getHeaderFieldKey(i); H/M@t\$Dc if(header!=null) cbTm'}R(G //responseHeaders.put(header,httpConnection.getHeaderField(header)); Pd Wx|y{% Utility.log(header+" : "+con.getHeaderField(header)); 5=ryDrx else 6=Otq=WH break; _oeS Uzq. } oUlVI*~ND } A*BeR0( Cw&KVw* H qx-;F~0 public void splitterStop() xJ.M;SF4 { nU7[c| = bStop = true; EADqC> } w``U=sfmV LKDO2N _H@DLhH|= } GZIa4A }O
p;
g^W u>vL/nI /* (#c:b **FileAccess.java 9hyn`u. *//文件访问(定位,写) ;RlxD 4p package NetFox; jmG~Un M import java.io.*; CU!Dhm/U u=e{]Ax#} `Urhy#LC public class FileAccessI implements Serializable{ < =IFcN 7b+6%fV //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 hM!a_' RandomAccessFile oSavedFile; 5|)W.*Q long nPos; =7UsVn#o J#83 0r(- cFX p public FileAccessI() throws IOException
[dz _R { =?8@#]G+ this("",0); 2&cT~ZX&' } m9;SrCN_ v`T
c}c ' )boE/4 public FileAccessI(String sName,long nPos) throws IOException :g/tZd$G5 { RxQ * oSavedFile = new RandomAccessFile(sName,"rw"); apn*,7ps65 this.nPos = nPos; ~"A0Rs= oSavedFile.seek(nPos); %(Icz? } );YDtGip J %BQ`MZ BnY&f public synchronized int write(byte[] b,int nStart,int nLen) 2~[juWbz { [nh>vqum int n = -1; m]&SN z= try{ t6t!t*jO oSavedFile.write(b,nStart,nLen); 7d\QB(~ n = nLen; K(|}dl: } @O~pV`_tD catch(IOException e) nJ;.Td { m4Zk\,1m.| e.printStackTrace (); -nwypu } F"mmLao $/ ],tSm |uJ%5y# return n; Dha1/g1q } ~$J2g o+VQ\1as?( ~.|_ RdN } w32y3~ LR3*G7 ?q [T /* 5:?!=<= **SiteInfoBean.java J.%IfN */ q.}CU.dp package NetFox; ),!qTjD 6S{l'!s'
Fk;Rfqq public class SiteInfoBean { ugBCBr qg$ <oL@~~ }-`4DHgq private String sSiteURL; //Site's URL nr#|b`J] private String sFilePath; //Saved File's Path u%!@(eKM- private String sFileName; //Saved File's Name 1 -b_~DF private int nSplitter; //Count of Splited Downloading File $pz/?>! +cRn%ioVi GtHivC public SiteInfoBean() SS2%qv {//nSplitter的缺省值为5 3(UVg!t //default value of nSplitter is 5 Fj!U|l\_9 this("","","",5); H;"4C8K7 } cH)";]k*- R|Q?KCI& 8?C5L8) public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) V~ _>U} { #LNED)Vg sSiteURL= sURL; e#q}F>/L sFilePath = sPath; |cY`x(?yP sFileName = sName; 9!tW.pK5 this.nSplitter = nSpiltter; p4)Q&k! F1hHe<) ^C%<l(b } \Og+c% QCJM& I?NyM public String getSSiteURL() DL.!G { ?1".;foZ return sSiteURL; Dhv3jg;lq } B1Oq!k \[nut; =Runf
+} public void setSSiteURL(String value) LHmZxi? { .8|X sSiteURL = value; t:c.LFrF } /L#?zSt @|)Z"m7 L8n|m!MOD public String getSFilePath() qY#6SO`_iy { ~_ a-E return sFilePath; $]8Q(/mbK } F<w/PMb RT5T1K08I MY/}-*| public void setSFilePath(String value) LIdF 0 { Hr4}3.8 sFilePath = value; O1kl70,`R } ]{L jRSV +^<](z cGD(.= public String getSFileName() \C1nZk?3 { P
}uOJVQ_ return sFileName; -%dCw6aX+ } {_dvx*M U%<Inb}ad
WN<zkM~3 public void setSFileName(String value) QdC<Sk!G { TB^$1C sFileName = value; *9i{,I@ } ]s748+ 6 aV_@no.C E~:x(5'%d public int getNSplitter() Q5_o/wk { Q3SS/eNP return nSplitter; Y4( } llsfTrp *\q
d 2Hv+W-6v public void setNSplitter(int nCount) yiI1x*^ { >"<Wjr8W!$ nSplitter = nCount; !g.? } ei{eTp4HpV } f
V( J| YnP5i#" cs'{5!i] /* gzg_>2Sj **Utility.java dq[xwRU1 */ a@*\o+Su package NetFox; K_-MYs. j8`BdKg
YrKWA public class Utility { +2j AC r BF <ikilR Z(!\%mn public Utility() @ry_nKr9 { /H==Hm/ *WT`o> AzxXB } 7\q~%lDE 6MkP |vr6 //线程睡眠 w+{LAS public static void sleep(int nSecond) \'bzt"f$j { O0y_Lm\ try{ 09Cez\0 Thread.sleep(nSecond); 0K2`-mL } L,@lp catch(Exception e) xZv#Es%# { ?3xzd P e.printStackTrace (); jalg5`PU0 } @|%2f@h } #lW`{i I
2|Bg,e //日志 &JI8]JmU) public static void log(String sMsg) uRr o?m< { Ez=Olbk System.err.println(sMsg); LE>]8[f6S } E+w<RNBmz Y.r+wc] h2""9aP! public static void log(int sMsg) 8pgEix/M5o { 'X2POay1 System.err.println(sMsg); (*)hD(C5 } $ DSZO!pB } %1$,Vs<RH tC9n
k5~ Oo%d]8W /* 3kMf!VL **TestMethod.java /Mu@,)'' */ 7x4PaX( package NetFox; qm o9G sp*v?5lW #?9;uy<j.q public class TestMethod { R!N%o~C2- \)?HJ l2P=R)@{ public TestMethod() ]`+HO=0 { ///xx/weblogic60b2_win.exe p"ZG%Ow5Q] try{ P(z++A& SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); :A'y+MnK< //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); +&2%+[nBZ SiteFileFetch fileFetch = new SiteFileFetch(bean); %n: k# fileFetch.start(); b`O'1r\Y; } d4c8~L
H- catch(Exception e){e.printStackTrace ();} r?
E)obE p2$P:!Y) fDU!~/# } V /V9B2.$ UQ@L V~6{R ?oHpFlj public static void main(String[] args) u($!z^h { <3C*Z"aQ>| new TestMethod(); ^qD$z=z- } cq/$N } 'u |c 点击下载更多相关资料
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