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/* d(9ZopJrQ **SiteFileFetch.java ul$k xc=N */ e`9d&" package NetFox; 5gYv CW&~ import java.io.*; 7yM=$"'d import java.net.*; ~(OG3`W! {Z0(V"Q Yl4XgjG public class SiteFileFetch extends Thread { Is1P,`*! ^S:S[0\, Cp4 U`] SiteInfoBean siteInfoBean = null; //文件信息Bean ix2V?\ long[] nStartPos; //开始位置 *;cvG?V long[] nEndPos; //结束位置 :}'5'oVG FileSplitterFetch[] fileSplitterFetch; //子线程对象 vqO d`_) long nFileLength; //文件长度 KT$Za boolean bFirst = true; //是否第一次取文件 R8LJC]6Bh boolean bStop = false; //停止标志 ovm109fTx File tmpFile; //文件下载的临时信息 fUj[E0yOF DataOutputStream output; //输出到文件的输出流 dt&m YSZ} n-zAkKM //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) T% 74JRQ public SiteFileFetch(SiteInfoBean bean) throws IOException ]!CMo+ { O(x1Ja,& siteInfoBean = bean; ;Z^\$v9? //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); N~H!6N W tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); B'}h6ZH if(tmpFile.exists ()) UMtnb:ek {
ac bFirst = false; m31l[e read_nPos(); rlxZ,]ul } w5fVug/;P else jN))|eD0x { {txW>rZX nStartPos = new long[bean.getNSplitter()]; kjAARW nEndPos = new long[bean.getNSplitter()]; S$#"bK/p^ } t5O '7x 8/W(jVO(- pmda9V4 nv$>iJ^~H } 5j'7V1:2 jW]Q- O-P'Ff"}t public void run() K0;caqE^ { 0?V{u`* //获得文件长度 E8X(AZ 2 //分割文件 lw+54lZX| //实例FileSplitterFetch {Kh^)oYdd //启动FileSplitterFetch线程 (KG2X //等待子线程返回 e= { ?d6 try{ l4Au{%j\ if(bFirst) UHyGW$B { v9k\[E? nFileLength = getFileSize(); l,fwF ua if(nFileLength == -1) r+TvC{ { /]U),LbN System.err.println("File Length is not known!"); %f)%FN.S } /1@py~ZX else if(nFileLength == -2) ._%8H { Qg6tJB System.err.println("File is not access!"); u@]rR&h` } kz0pX-@b else ,#Pp_f< { O0l1AX" for(int i=0;i<nStartPos.length;i++) `.i #3P { d9iVuw0u< nStartPos = (long)(i*(nFileLength/nStartPos.length)); vzX%x ul } h 8<s(WR for(int i=0;i<nEndPos.length-1;i++) !w1acmo<_ { y3XR:d1cg nEndPos = nStartPos[i+1]; }|UTwjquBD } u+lNcyp"MW nEndPos[nEndPos.length-1] = nFileLength; /np05XhEa } G^ShN45 } :3N6Ej V~#8lu7; Tuz~T
_M //启动子线程 f_|pl^ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ajCe&+ for(int i=0;i<nStartPos.length;i++) Z-j?N{3& { fQU5' wGp fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %45*DT siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), %E8HLTEvl nStartPos,nEndPos,i); ~@#s<a,%; Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); j'x@P+A fileSplitterFetch.start(); -!lSk?l } I*z|_}$ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 8\F|{vt# siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); i);BTwW)#] // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", uS<og P nEndPos = " + nFileLength); qWU59:d^{ // fileSplitterFetch[nPos.length-1].start(); -G[TlH06 lT?Vt`==~M :]JMsa6 //等待子线程结束 )Vz=:.D //int count = 0; vs^)= //是否结束while循环 g#Z7ReMw boolean breakWhile = false; =qvn?I^/ 4`Cgz#v
{ zr ~4@JTS while(!bStop) !eHQe7_ { 5d;(D i5z write_nPos(); L)i6UAo Utility.sleep(500); 9=J 3T66U breakWhile = true; rR4?*90vjj /2Z7 a|5<L for(int i=0;i<nStartPos.length;i++) O]XgA0] { y*Gq VA[ if(!fileSplitterFetch.bDownOver) ^V~^[Yp { R5i xG9 breakWhile = false; d};[^q6X break; 9ec>#Vxx } z57q| } t*`G@Nj if(breakWhile) )EK\3q break; UGxF}Q %CZGV7JdA ai<K6) //count++; e6>[Z C //if(count>4) QFB2,k6jN // siteStop(); DW>O]\I } CHi
t{
@9 "yK)9F[9Mo ?pdN!zOeL System.err.println("文件下载结束!"); bZ#KfR } th{ie2$ catch(Exception e){e.printStackTrace ();} E9 w"?_A) } cm8co g,G{%dGsk V`0Y
p //获得文件长度 iA|n\a~ny, public long getFileSize() hh$i1n { Nx zAlu int nFileLength = -1; </B:Zjn try{ % EYh*g{G URL url = new URL(siteInfoBean.getSSiteURL()); g W?Hd/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); tiy#b8 httpConnection.setRequestProperty("User-Agent","NetFox"); o4^#W;%w BC85#sbl q&&uX-ez5W int responseCode=httpConnection.getResponseCode(); ,g 1~4,hqQ if(responseCode>=400) VVEJE$ { ]M 2n%9 processErrorCode(responseCode); #<@_mbQ@|K return -2; //-2 represent access is error Uh XVeGO } S"fqE% R2qz>kyyB uF{l`|b' String sHeader; Pz|}[Cx- wH\
K'/ e
+jp,>(v for(int i=1;;i++) RDeI l& { ~iIFe+6 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); K#N5S]2yb //Utility.log(in.readLine()); -%Jm-^F I sHeader=httpConnection.getHeaderFieldKey(i); 5! ]T%.rM if(sHeader!=null) P
V9q= { 8} X>u2t if(sHeader.equals("Content-Length")) c],Zw { AHT(Z~C nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); b%X<'8z9Z break; R0yp9icS } _$mS=G( } PKev)M;C+ else k#2b3}(, break; Qqd +=mgc } #UnGU,J } 5r0Sl89J catch(IOException e){e.printStackTrace ();} !MOcF5M catch(Exception e){e.printStackTrace ();} Q@s G6iz {\VmNnw /AIFgsaY Utility.log(nFileLength); ?U,Xy xN yn2k!2]&T< }cIj1: return nFileLength; t?p>L* } v){X&HbP r2&/Ii+ W,%qL6qV //保存下载信息(文件指针位置) zB"y^g private void write_nPos() 3P*"$ fH { rY"EW"y try{ 'l1cuAP!+ output = new DataOutputStream(new FileOutputStream(tmpFile)); InG<B,/W? output.writeInt(nStartPos.length); ^Uldyv/ for(int i=0;i<nStartPos.length;i++) 6a6N$v" { ?YM0VB,y // output.writeLong(nPos); g:>dF# output.writeLong(fileSplitterFetch.nStartPos); K14{c1 output.writeLong(fileSplitterFetch.nEndPos); 602=qb } 5?TjuGc output.close(); %G jjl*`E } ks8x xY catch(IOException e){e.printStackTrace ();} F '55BY*! catch(Exception e){e.printStackTrace ();} ([ hd } |H8UT SX+ r+nhm"9 =V^8RlBi //读取保存的下载信息(文件指针位置) 0[s<!k9= private void read_nPos() D|8h^*Ya { cV* 0+5 try{ :5zO!~\
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); K
st2.Yy int nCount = input.readInt(); k= 9a/M
u nStartPos = new long[nCount]; ,oj)`?Vh nEndPos = new long[nCount]; =1j`VJU9 for(int i=0;i<nStartPos.length;i++) jE$]Z(Ab { =l$qwcfbo nStartPos = input.readLong(); (<yQA. M nEndPos = input.readLong(); o &E2ds3 } vFGVz input.close(); gjy:o5{vA* } q%FXox~b catch(IOException e){e.printStackTrace ();} 7=4V1FS6i catch(Exception e){e.printStackTrace ();} x{{ZV] } ;7yt,b5&C B=2f-o +'D
#VG private void processErrorCode(int nErrorCode) "\kr;X' { ptpu
u=3" System.err.println("Error Code : " + nErrorCode); SG3qNM: g }
EJO6k1 bhT:MW! nIqmora //停止文件下载 Jz)c|8U public void siteStop() `L"{sW6S { ZQDw|*a@ bStop = true; mr`EcO0 for(int i=0;i<nStartPos.length;i++) zC$(/nZ
fileSplitterFetch.splitterStop(); N:rnH:g+: xw rleB r/6h} } u}KEH@yv
} >l!DWi6 //负责部分文件的抓取 nL*
SNQ_ **FileSplitterFetch.java ,m.IhnCV\ */ Edav }z package NetFox; !CuLXuM "ZFK-jn/ YS&Q4nv- import java.io.*; ^1+&)6s7V import java.net.*; s&WHKCb 9@z"~H TWJ%? /d public class FileSplitterFetch extends Thread { .cm$*>LW:x #3Jn_Y%P. Hh.l,Z7i7D String sURL; //File URL V s1Z$HS` long nStartPos; //File Snippet Start Position TfqQh!Y long nEndPos; //File Snippet End Position NpY zN|W: int nThreadID; //Thread's ID [
f`V_1d3 boolean bDownOver = false; //Downing is over "npLl]XM boolean bStop = false; //Stop identical VBI~U?0 FileAccessI fileAccessI = null; //File Access interface b$'}IWNV u:D,\`;) J;7O`5J public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException mGqT_
{ fRd^@@,[ this.sURL = sURL; v/WvT!6V` this.nStartPos = nStart; Gd%E337d this.nEndPos = nEnd; ~!W{C_*N nThreadID = id; _8"%nV fileAccessI = new FileAccessI(sName,nStartPos);//定位 qU,u(El } 6'qC *r m%km@G$ >~k"C,6 public void run() YV>]c9!q { X
Sw0t8 while(nStartPos < nEndPos && !bStop) 2N:|B O> { cp>1b8l6? l>O~^41[ r+%}XS%;h try{ *R6Ed URL url = new URL(sURL); K0O&-v0"1 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); lZ9rB^! httpConnection.setRequestProperty("User-Agent","NetFox"); P>3
;M'KsO String sProperty = "bytes="+nStartPos+"-"; /a!M6:,pX httpConnection.setRequestProperty("RANGE",sProperty); i>68gfx Utility.log(sProperty); .0>2j( aM|^t: s!j[Ovtx InputStream input = httpConnection.getInputStream(); _]whHS+ //logResponseHead(httpConnection); 6vQCghI !nkjp[p 5L4{8X0X8 byte[] b = new byte[1024]; 3KW4 ]qo~ int nRead; gK8{ =A0c while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) zn'F9rWx> { F"<TV&xf nStartPos += fileAccessI.write(b,0,nRead); &{c.JDO //if(nThreadID == 1) hf~'EdU // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); G F-\WD } o1kY|cnGH 89[5a ub/9T-#l Utility.log("Thread " + nThreadID + " is over!"); =
j,Hxq bDownOver = true; Y[ciT) //nPos = fileAccessI.write (b,0,nRead); TxD,A0 } 2\p8U#"" catch(Exception e){e.printStackTrace ();} 9zKrFqhNo } r2]KP(T8| } R6A{u( =k\V~8XZ %cl=n!T //打印回应的头信息 |aovZ/b4 public void logResponseHead(HttpURLConnection con) :Ej#qYi { )E.!jL:g for(int i=1;;i++) rVE!mi]% { Pn*+g!` String header=con.getHeaderFieldKey(i); ROyG+dUy if(header!=null) As;@T$G //responseHeaders.put(header,httpConnection.getHeaderField(header)); n@)Kf
A)& Utility.log(header+" : "+con.getHeaderField(header)); zMf. else vO#=]J8` break; D!-
78h } dC7YVs_,# } $-}a<UFE; .m]"lH* B8Cic\2 public void splitterStop() WDC+Jmlgp { '
R!pc bStop = true; ueyz@{On~ } +;P8QZK6 75+#)hNa!P ;|.^_Xs } J.r^"K\ -r6cK,WVU t0 1@h_WS /* ?9Eshw2 **FileAccess.java <GbF4\ue *//文件访问(定位,写) S~9K'\vO package NetFox; 3:Mq40]x import java.io.*; w@&4dau _bi]Bpxf Z-fQ{&a{ public class FileAccessI implements Serializable{ c&{1Z&Y .K=r.tf~ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ?+]prbt) RandomAccessFile oSavedFile; 3~I|KF7x long nPos; LX
[ _6 \{HbL,s rff=ud>Jf public FileAccessI() throws IOException \pXs&}%1,F { SM;*vkwz~ this("",0); p5C:MA~* } e'FBV[e "B~c/%#PH '@$YX*[ public FileAccessI(String sName,long nPos) throws IOException 0UJ%tPS { WUwH W oSavedFile = new RandomAccessFile(sName,"rw"); []'gIF this.nPos = nPos; 8!~8:?6n oSavedFile.seek(nPos); ! z^%$;p } vdn`PS'# qgT~yDm CEwMPPYnD public synchronized int write(byte[] b,int nStart,int nLen) |,3>A@ { TSGJ2u5ie% int n = -1; g[Z$\A?ZbZ try{ uANG_sX^n oSavedFile.write(b,nStart,nLen); jT~PwDSFt3 n = nLen; )U?Tmh } tl 0_Sd catch(IOException e) WF)(Q~op0U { G E=J Y e.printStackTrace (); I~'% } $2p=vi3 otA59 ;Z -YXNB[C return n; }e7os0;s } o$*aAgS+ gx-ib/_f1 9{D u)k } ZA u=m DqfWu* a'T8U1 /* `&\jOve **SiteInfoBean.java 1ZL91'U */ qXOWCYqs package NetFox; ae1?8man z n,y'}, "!ZQ`yl public class SiteInfoBean { HHT_ }_? R&>G6jZ?8 <G9HVMiP private String sSiteURL; //Site's URL eP d private String sFilePath; //Saved File's Path 03ol6y )C private String sFileName; //Saved File's Name #ujry.m private int nSplitter; //Count of Splited Downloading File J`E,Xw>2 `D44I;e^1; q*L>MV public SiteInfoBean() (Dy6I;S {//nSplitter的缺省值为5 U$*AV<{% //default value of nSplitter is 5 Jy#c 6 this("","","",5); dRdI(' } bW]7$?acv HE;}B!> iyA=d{S;V public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) L701j.7" { 50s1o{xwc sSiteURL= sURL; o1kTB&E4B sFilePath = sPath; IhIz 7.| sFileName = sName; %DK0s(*w0 this.nSplitter = nSpiltter; (yx^zW7 S!Alno q 9e(YX> } &d%\&fCm( X#ZQpo'h b< dwf[ public String getSSiteURL() ', WnT: { "QKCZ8_C return sSiteURL; og`rsl } &$$o=Y g, y%Q0*
_ Bi.,@7|> public void setSSiteURL(String value) j8cIpbp8x { ^n|yfvR sSiteURL = value; 3X;k c> } !^yH]v <y
S|\Z| LD=e Mk:
~ public String getSFilePath() 5NR@<FE { H[S}&l\D4 return sFilePath; ,QeJ;U } -> ^Ex` _Gu;= H,~& w4nU86oZYl public void setSFilePath(String value) w)rd--9f { @%'1Jd7-Wp sFilePath = value; ]<3n;*8k? } !K8Kw
W|X wD\viuq0 g"Tb\ public String getSFileName() `hl8j\HV<} { kqH:H~sgD return sFileName; eh39"s } 0.aIcc ]\C wa9 Sl;[9l2 public void setSFileName(String value) 2 rFjYx8D! { ]
6X;&=H sFileName = value; t/wo
G9N } qkM)zOZ^ g@O H,h/ E0*KKo% public int getNSplitter() q4EOI { :`>$B?x+ return nSplitter; k-Z:z?M } f7SMO-3a e7Sp?>-d "5!T-Z+F public void setNSplitter(int nCount) kR+7JUq] { 68?>#o865 nSplitter = nCount; +SB>> } :R-_EY$k6 } Q}: $F{ {>3J 96 :cxA /* EY`]""~8v **Utility.java $ {h1(ec8 */ M
ZAz= )- package NetFox; S}b^_+UbP
hm\UqIt kaT
! public class Utility { N>H#Ew@2U (KLhF EzeU-!|W public Utility() :I{9k~ { Ygbyia| [[#R ry B1V+CP3t } 3#0y.. F UQg_y3
#V //线程睡眠 *Fg)`M3g public static void sleep(int nSecond) 7 w<e^H? { HU/2P` DGP try{ PavW@ Thread.sleep(nSecond); L)n_
Q } -@tj0OHg catch(Exception e) uznYLS { =fy\W=c e.printStackTrace (); v:P=t2q } R.\]JvqO } Ne)3@? c{IL"B6> //日志 I.'/!11> public static void log(String sMsg) '
<?=!&\D { g%V#Z`*| System.err.println(sMsg); sd"eu } *10qP?0H MH|F<$42 D4N(FZ0~ public static void log(int sMsg) i6f42]Jy { GkIhPn(d System.err.println(sMsg); #+N_wIP4 } *b_Iby-ZD } lGt:.p{NG %^d<go^ =CW> ;h] /* MGf *+!y, **TestMethod.java +w7U7"
xQ */ ~"_!O+Pj package NetFox; O+|ipw*B% V!(7=ku!` @^<&LG5^ public class TestMethod { '"+Gn52# %JH/|mA&| TNckyP75u public TestMethod() XDAP[V { ///xx/weblogic60b2_win.exe E+ |K3EJ try{ DgK*>A SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); m[%':^vSr //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); C=(Q0-+L| SiteFileFetch fileFetch = new SiteFileFetch(bean); d'&OEGb< fileFetch.start(); jhPbh5E } 3d]~e catch(Exception e){e.printStackTrace ();} vS"h`pL TFm[sO0RZ =1k%T {> } [y}h j{'_sI{{ JS/ChoU public static void main(String[] args) g\?v 5 { Lyf5Yf([- new TestMethod(); t%G.i@{pkp } f _$hK9I } x[$KZGK+GL 点击下载更多相关资料
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