-
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
|
/* @3@oaa/v **SiteFileFetch.java ywS2`( */ IU*w'a package NetFox; si|DxDx import java.io.*; wqyrs|P import java.net.*; Q+]9Glz9 y@?t[A#v :-Al}7 public class SiteFileFetch extends Thread { j/<z[qr PWw2;3`-6w /5Zt4&r SiteInfoBean siteInfoBean = null; //文件信息Bean MU/3**zoW long[] nStartPos; //开始位置 _RcFV long[] nEndPos; //结束位置 CYCG5)<9 FileSplitterFetch[] fileSplitterFetch; //子线程对象 L[s8`0 long nFileLength; //文件长度 KnjowK boolean bFirst = true; //是否第一次取文件 4v("qNw# boolean bStop = false; //停止标志 "\l O1D File tmpFile; //文件下载的临时信息 c7fQ{"f 3B DataOutputStream output; //输出到文件的输出流 <.lT.>'?
!=w&=O0( //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) *tD`X(K public SiteFileFetch(SiteInfoBean bean) throws IOException (T]< { LAT%k2%Wx siteInfoBean = bean; 3?rYt:Uf! //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 8w|-7$ v tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 8^FAeV# if(tmpFile.exists ()) F3L'f2yBG { klKd ! bFirst = false; u{_jweZ read_nPos(); 9gLUM$Kd } h*JzJ0X else />,Tq!i\4} { O5:2B\B nStartPos = new long[bean.getNSplitter()]; =Hs[peO* nEndPos = new long[bean.getNSplitter()]; s/"?P/R } FNyr0!t, 6mH --!j +"Ui@^ <7;AK!BH } !PIpvx{aX )GpH5N'EI lwU$*?yv public void run() xc HG5bg| { ojA i2uz //获得文件长度 pDg_^| //分割文件 V?*\ISB`} //实例FileSplitterFetch AKbrXKx //启动FileSplitterFetch线程 *Ou )P9~-L //等待子线程返回 ]tzO)c)w; try{ zL<<`u? if(bFirst) [4_JK { ;F;"Uw nFileLength = getFileSize(); .%'$3=/oe if(nFileLength == -1) L
=kc^dU { 8a;I,DK=j System.err.println("File Length is not known!"); w>q:&Q } qf7oG0 else if(nFileLength == -2) .1&~@e%=- { }zkMo? System.err.println("File is not access!"); *yx&4)Or } HZHzjrx else n4YedjHSN { y[W<vb+F for(int i=0;i<nStartPos.length;i++) \
M_}V[1+ { F;Lg
w^1! nStartPos = (long)(i*(nFileLength/nStartPos.length)); 4KkjBPV } H*Tc.Ie for(int i=0;i<nEndPos.length-1;i++) [9:'v@Ph { JFvVRGWB nEndPos = nStartPos[i+1]; RKY~[IQ, } 9EE},D nEndPos[nEndPos.length-1] = nFileLength; P9\!JH! } .Kn)sD1 } d0;$k, yz CQ jBTXs5q //启动子线程 J9kmIMq-C fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; FHu
-'; for(int i=0;i<nStartPos.length;i++) c~1X/,biA { nS53mLU) fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), *,UD&N_)*6 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), i"h '^6M1 nStartPos,nEndPos,i); ,1s,G]%M Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Gxtb@`f fileSplitterFetch.start(); I4%p?'i,C } 7h3#5Y // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), *f? z$46 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Gg\805L@ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", wQ4IQ! nEndPos = " + nFileLength); 9 NO^ ' // fileSplitterFetch[nPos.length-1].start(); !w!}`|q qOusO6 h|MTE~
//等待子线程结束 lDQ' //int count = 0; RO([R=.`/ //是否结束while循环 Z]1=nSv boolean breakWhile = false; eu]t.Co[X Nf#8V| RcASFBNpS while(!bStop) !F|mCEU { (&w'"-` write_nPos(); lYS+EVcR Utility.sleep(500); me#?1r breakWhile = true; $ON4nx fcuU,A VPKoBJ& for(int i=0;i<nStartPos.length;i++) Nvlfi8. { $ylQ \Y' if(!fileSplitterFetch.bDownOver) \G3P[E[ { j=%^CRum breakWhile = false; hU}!:6G%[P break; 98%M`WY } <h$Nh0 } 1;\A./FVv if(breakWhile) a^vXwY break; #!m`A+!~! =*icCng fI/?2ZH //count++; Y\.ds%G //if(count>4)
_e
]jz2j // siteStop(); _86#$|kw } QEh_2 Y4\BHFq a cSm+t System.err.println("文件下载结束!"); _?vh#6F } "!9hcv-; catch(Exception e){e.printStackTrace ();} QW5S=7 } 8>E_bxC Z$0+jpG_s woH B![Q, //获得文件长度 ,_JhvPWR,) public long getFileSize() uN:|4/;{& { pzo9?/- int nFileLength = -1; >y2;sJ4]D% try{ wH=L+bA>a URL url = new URL(siteInfoBean.getSSiteURL()); GwOn&EpY! HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); arCi$:-z@ httpConnection.setRequestProperty("User-Agent","NetFox"); !J5k?J&{= X#qmwcF J3]W2m2Zw int responseCode=httpConnection.getResponseCode(); 5}4f[ if(responseCode>=400) W>ziA { {*=+g>RgD processErrorCode(responseCode); UBmD
3|Zo return -2; //-2 represent access is error re\@v8w~ } LqH<HGMFD 2k
}:)]m ^4+ew>BLSv String sHeader; ;g3z?Uz) d},IQ,Az:Z lZY0A#
for(int i=1;;i++) AoaRlk-# { E&\dr;{7 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); >@NH Al //Utility.log(in.readLine()); uhyw?#f sHeader=httpConnection.getHeaderFieldKey(i); 0!D,74r if(sHeader!=null) L[]*vj { F:PaVr3q if(sHeader.equals("Content-Length")) 7,i}M { *wgHa6?+7 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Q}KNtNCpx break; 5E~?hWAv } Dq#/Uw# } sr0.4VU1 else F{#m~4O break; LQ,RQ~! } dLtSa\2Hn } +E8Itb, catch(IOException e){e.printStackTrace ();} 4"OUmh9LHB catch(Exception e){e.printStackTrace ();} Yy 4EM -BY'E$]4 bYuQ"K
A$ Utility.log(nFileLength); 0_}^IiG wq[\Fb` [0_JS 2KE return nFileLength; `EV"
/&` } a@|/D\C R^}}-Dvr G}o?lo\#h //保存下载信息(文件指针位置) L<kIzB ! private void write_nPos() e&Z\hZBb { T;cyU9 try{ Wq bfZx output = new DataOutputStream(new FileOutputStream(tmpFile)); g/)$-Z)Nu output.writeInt(nStartPos.length); }PZz(Ms for(int i=0;i<nStartPos.length;i++) HT]v S}s { L53qQej< // output.writeLong(nPos); Q^^.@FU"x output.writeLong(fileSplitterFetch.nStartPos); \5+?wpH output.writeLong(fileSplitterFetch.nEndPos); _xg4;W6M= } }pE8G#O& output.close(); \htL\m^$9 } 'C
l}IDF catch(IOException e){e.printStackTrace ();} }E01B_T9z catch(Exception e){e.printStackTrace ();} XA
cpLj] } ep"YGx[V 64Ot`=A" Hpo/CY/ //读取保存的下载信息(文件指针位置) 0-)D`s% private void read_nPos() $ae*3L>5M { b.qp&2 A try{ nI1DLVt DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); _3q% int nCount = input.readInt(); h[5<S& nStartPos = new long[nCount]; KY)rkfo B nEndPos = new long[nCount]; "3!!G=s P for(int i=0;i<nStartPos.length;i++) M7Pvc%\) { VZOf| o nStartPos = input.readLong(); R3MbTg nEndPos = input.readLong(); o8!gV/oy } QN %w\JXS input.close(); ?/mk FDN } *. H1m{V catch(IOException e){e.printStackTrace ();} (S:+#v catch(Exception e){e.printStackTrace ();} G;:D6\ } ^y@RfM=A \z}/=Qgc ]!>ThBMa private void processErrorCode(int nErrorCode) ~|j :xM(i { 9NH"Ik* System.err.println("Error Code : " + nErrorCode); 6E9y[ %+ } )P6n,\ NLe+ 'xNPy =# //停止文件下载 b\/:-][ public void siteStop() SZOcFmC? { %-~W|Y bStop = true; uV]4C^k;`[ for(int i=0;i<nStartPos.length;i++) ,hj5.;M fileSplitterFetch.splitterStop(); zVLv-U/=d ?[4!2T,Ca ,&S^R yc } U @Il:\I } [OI&_WIw //负责部分文件的抓取 7wt2|$Qz **FileSplitterFetch.java %21i#R`E */ ,2F4S5F~rC package NetFox; 8^fkY'x 9N9dQ}[:g M Cam c import java.io.*; .xtjB8gc import java.net.*; &9CKI/K: F+;{s(wx o C]tEXJ public class FileSplitterFetch extends Thread { B,SH9, GW]E,a zy(i]6 String sURL; //File URL 1'5I]D
ec long nStartPos; //File Snippet Start Position <B]\& long nEndPos; //File Snippet End Position &Mset^o int nThreadID; //Thread's ID Gt&x< boolean bDownOver = false; //Downing is over aqvt$u8 boolean bStop = false; //Stop identical >3H/~ Y FileAccessI fileAccessI = null; //File Access interface tuA,t *_<P%J 1sFTXl public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException WA-`
*m$v { m`<Mzk.u< this.sURL = sURL; RUTlwTdv this.nStartPos = nStart; T^-fn this.nEndPos = nEnd; t#+X*'/ nThreadID = id; R5LzqT,/N: fileAccessI = new FileAccessI(sName,nStartPos);//定位 15Vb`Vf`N } #C?T |H67ny&K^& 0_HdjK public void run() 2e}${NZN { -GkNA"2M[ while(nStartPos < nEndPos && !bStop) ~L!*p0dS^ { 7@g8nv(p V/Hjd`n)`i |]a=He; try{ @Taj++ua URL url = new URL(sURL); )u7*YlU\I HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Wxl^f?I`: httpConnection.setRequestProperty("User-Agent","NetFox"); OE(H:^ZR String sProperty = "bytes="+nStartPos+"-"; o5 6_t{< httpConnection.setRequestProperty("RANGE",sProperty); Dc |!H{Yr Utility.log(sProperty); ]KGLJ~hm> _W 41;OY @%L4^ms InputStream input = httpConnection.getInputStream(); daT[2M //logResponseHead(httpConnection); kBY54pl \H$Ps9Xh !dfc1 UjB byte[] b = new byte[1024]; \F%5TRoC int nRead; tE0DST/ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) [h 8j0Q@Q { N=K|Nw nStartPos += fileAccessI.write(b,0,nRead); v*%#Fp,g8 //if(nThreadID == 1) -k{n"9a9? // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); .s31D%N } CW k#Amt. .3Nd[+[ )rv5QH`i Utility.log("Thread " + nThreadID + " is over!"); 7<[p1C*B bDownOver = true; o+W5xHe^1 //nPos = fileAccessI.write (b,0,nRead); ]=p@1 } :.['e` catch(Exception e){e.printStackTrace ();} ^Yei9bXl } 0bxB@(NO } 3X$)cZQ .$+]N[-=
ZCi~4&Z# //打印回应的头信息 uhL+bj+W public void logResponseHead(HttpURLConnection con) <@FOqi{o{ { <Vyv)#32o3 for(int i=1;;i++) orn9;|8q { oxE'u< String header=con.getHeaderFieldKey(i); ;crQ7}k if(header!=null) ;bVC7D~~4w //responseHeaders.put(header,httpConnection.getHeaderField(header)); ig:/60Z Utility.log(header+" : "+con.getHeaderField(header)); f3e#.jan else ((A]FOIbO break; Ev;HV}G } k"|4
LPv[ } J#B%
#X Z~{0XG\Y ][-N< public void splitterStop() >*H>'O4 {
R6~x! bStop = true; Pw/Z;N;:V } +MPM^ m zVe@`gc W
HO;;j } }l&Uh&B` Vh^fbv`? J&}/Xw) /* Pl<r*d)h **FileAccess.java 6\ /x *//文件访问(定位,写) ~H/|J^ J package NetFox; yiGq?WA7 import java.io.*; naCPSsei 2bxkZS] U>6MT@\ public class FileAccessI implements Serializable{ tVd\ r"0k 2yR*<yj //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 5Z}]d@ RandomAccessFile oSavedFile; SCE5|3j long nPos; -}0S%|#m ?ix--?jl -frmvNJ F public FileAccessI() throws IOException AR AC'F0 { FR9qW$B this("",0); R%o:'-~ } AEx
I! S?n k9T+ %o9@[o
.] public FileAccessI(String sName,long nPos) throws IOException `E>HpRcxD { L<!}!v5ja oSavedFile = new RandomAccessFile(sName,"rw"); :#58m0YLA: this.nPos = nPos; Xn-GSW3{ oSavedFile.seek(nPos); \y^ Od7F } F+Rtoq| 8*3o9$Pj pDb5t> public synchronized int write(byte[] b,int nStart,int nLen) 'gk.J { B
PTQm4TN int n = -1; W-q2|NK try{ G$pTTT6# oSavedFile.write(b,nStart,nLen); $,q~ q^0 n = nLen; Htn=h~U`z } ,~8:^*0s catch(IOException e) !/+ZKx("9 { o9ZHa e.printStackTrace (); q\ FF)H } ES!$JWK| /PG+ s6 =3OK3| return n; km2('t7? } ;LE4U OK Jm$.$B&I }]_/:KUt } aAZS^S4v r=P)iE: l
T~RH0L /* fyPpzA0 **SiteInfoBean.java ^I03PIy0l */ 9Z]~c^UB package NetFox; o&P}GcEIw $&/JY P'f
=r% public class SiteInfoBean { :+{G|goZ* z+I'N4*^ G 'IqAKJ private String sSiteURL; //Site's URL ZC 7R f private String sFilePath; //Saved File's Path ~Q"3#4l private String sFileName; //Saved File's Name Bz<T{f private int nSplitter; //Count of Splited Downloading File C,7d GL$!JKWp 0X@!i3eu public SiteInfoBean() j78WPG {//nSplitter的缺省值为5 &v|Uy}h&%1 //default value of nSplitter is 5 =!T@'P? this("","","",5); !E!i`yF } DhY.5 b"n8~Vd I
Y%M5(&Q public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) n2&*5m&$ { i'9aQi"G sSiteURL= sURL; DhZuQpH sFilePath = sPath; VZo[\sWf sFileName = sName; ,Oa-AF/p this.nSplitter = nSpiltter; stuj,8 >QO^h<.> )3# gpM } Fw5|_@&k _+PiaJ&' /a.4atb0 public String getSSiteURL() ?q a { 't:$Lx return sSiteURL; K
;\~otR^ } 2Ya)I k{ MuXp*s3[ O O?e8OU public void setSSiteURL(String value) TI4#A E { ,5oe8\uz sSiteURL = value;
"1O!Ck_n } {$D[l
hj Cbu/7z MB.\G.bV public String getSFilePath() &_Kb;UVRj { j6v|D>I return sFilePath; -!MrG68 }
Fj Rt' /(IV+ J1OZG6|e public void setSFilePath(String value) G8=2=/ ! { e??tp]PLn sFilePath = value; ~C[p}MED } gGF]Dq p3>(ZWPNV n%'M?o]DF public String getSFileName() TNe,'S,% { Z9X<W` return sFileName; MzjV>. } D![42H+-Qd !5,>[^y3 |^fubQs;2 public void setSFileName(String value) <xM$^r) { DfYOGs]@ sFileName = value; 3ARvSz@5 } Gk_%WY* ,=sbK?& pde,@0(Fa public int getNSplitter() q#LB 2M { >[t0a"
return nSplitter; ^u'hl$`^ } W0e+yIaR $VEG1]/svp _|<kKfd? public void setNSplitter(int nCount) l-s%3E3 { PPoQNW nSplitter = nCount; k=;>*:D% } ;:<z hO } |;xm-AM4r )Z6bMAb0'N ZEY="pf /* TljN!nv] **Utility.java *u
L Ooq */ k(hYNmmo
j package NetFox; HI iMq'H^ #a1zk\R3 +*u'vt? public class Utility { 590.mCm 3OnIAk3 m]H[$Q public Utility() OAigq6[, { Zop3[- x)evjX=q A8,9^cQ] } M)v\7a ++ O
L&n //线程睡眠 OJ#ehw < public static void sleep(int nSecond) j,<3[ { W,sU5sjA try{
V|6PKED Thread.sleep(nSecond); +'fy%/ } wVegr catch(Exception e) 0|6]ps4Z7 { ~K'e}<-G e.printStackTrace (); feJzX*u } 9Z?P/
o } M:t!g% l^`& Tnzv //日志 `Fn"%P! public static void log(String sMsg) {
'A`ram { 'iQ System.err.println(sMsg); b\6)whh } L'i0|_ nP]tc Q?"o.T'; public static void log(int sMsg) IZ){xI { 99QMMup System.err.println(sMsg); !LGnh } ku2gFO } yf|,/{S !Cqm=q{K Wp2W:JX: /* @|I:A **TestMethod.java R$>]7-N} */ @ P:b\WCI package NetFox; IE;Fu67wi {;:QY1QT 48}L!m @ public class TestMethod { .&z/p3 1 ,E7+Z' ; (tZ#EL0 public TestMethod() l'yX_`*Iq { ///xx/weblogic60b2_win.exe :+ASZE. try{ U2Uf69R SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); $O\I9CGr$ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); B #o/3 SiteFileFetch fileFetch = new SiteFileFetch(bean); tKr.{#) fileFetch.start(); .`I;qF } 'eM90I%( catch(Exception e){e.printStackTrace ();} L&D+0p^lI P<.
TiF?@ T/[8w } xXa* d S7|6dwQ& xg:r5Z/|) public static void main(String[] args) 25bbuhss { D\~s$.6B new TestMethod(); ;N+
v x } {J aulg } ?nVwT[ 点击下载更多相关资料
|