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/* xU4,R cgo **SiteFileFetch.java K/+Y9JP9 */ bi y1!r package NetFox; $n30[P@p; import java.io.*; 3_:J`xX(4 import java.net.*; D\}A{I92F4 TmZ%
;TN {_GhS% public class SiteFileFetch extends Thread { UQmdm$. 8{@0p"re@ =.Tc
l"O[ SiteInfoBean siteInfoBean = null; //文件信息Bean %jgB;Y long[] nStartPos; //开始位置 }0&@J'< long[] nEndPos; //结束位置 5.KhI <[ FileSplitterFetch[] fileSplitterFetch; //子线程对象 umt*;U= long nFileLength; //文件长度 2WK]I1_ boolean bFirst = true; //是否第一次取文件 i$GL]0 boolean bStop = false; //停止标志 8ug\GlZc File tmpFile; //文件下载的临时信息 E>t5/^c)*w DataOutputStream output; //输出到文件的输出流 HAof,* h$ Z%]s+V)st //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) To_Y
8 G public SiteFileFetch(SiteInfoBean bean) throws IOException HzcI2
P`| { gVM&wo | siteInfoBean = bean; Ifghyh<d //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath()));
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&Oz!TQ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 8reis1]2S if(tmpFile.exists ()) O_yk< { q97Z .o bFirst = false; llbf(! read_nPos(); ?Vy%<f$ } lV4|(NQ9 else vkFq/+'U { `Ap<xT0H nStartPos = new long[bean.getNSplitter()]; MN wMF nEndPos = new long[bean.getNSplitter()]; {tq.c9+!d } bq mb|mD 8|5ttdZ s4RqY*VK ]kXiT Yg } rHzwSR@}1 ?<YQ
%qaW7 8F?6Aq1B public void run() F/91Es { l[Hgh, //获得文件长度 `eD70h`XK //分割文件 5crd.1@^ //实例FileSplitterFetch 0X.(BRI~6p //启动FileSplitterFetch线程 eXB'>#&s //等待子线程返回 ?AMn>v try{ !'y9/ if(bFirst) 2pKkg>/S { :gD=F &V nFileLength = getFileSize(); U3R;'80 f if(nFileLength == -1) "iu9r%l94 { it
Byw1/ System.err.println("File Length is not known!"); us/}_r74N* } ULqFJ*nla else if(nFileLength == -2) Oz3JMZe { ~F gxhK2+ System.err.println("File is not access!");
Ez\TwK } _6y#?8RMB else :5YL!D/& { DZ-2Z@{PX for(int i=0;i<nStartPos.length;i++) C;mcb$@ { Pv- i. nStartPos = (long)(i*(nFileLength/nStartPos.length)); t)!(s,;T } ,;&j*qFi for(int i=0;i<nEndPos.length-1;i++) %T~3xQ { MBeubS nEndPos = nStartPos[i+1]; Wu}84W"!.V } 16J"QUuG nEndPos[nEndPos.length-1] = nFileLength; 'AU:[eyUV } %5?Zjp+9 } /0.m|Th'm A_:CGtv: DW@|H //启动子线程 ZGa;' fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; &xAwk-{W for(int i=0;i<nStartPos.length;i++) xaPaK- { LqZsH0C fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), yYdow.b! siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), @N
tiT,3k nStartPos,nEndPos,i); %<^IAMkp Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); kH.e"e fileSplitterFetch.start(); ZOAHM1ci } &nKb<o // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), xtWwz}^8] siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); WQJnWe // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ?M<q95pL nEndPos = " + nFileLength); 3PLYC}Jq // fileSplitterFetch[nPos.length-1].start(); 4p}?QR>tZ 0*=[1tdWY bfE4.YF //等待子线程结束 {*BZ;Xh\8 //int count = 0; 3xhGmD\SKO //是否结束while循环 nM<B{AR5^ boolean breakWhile = false; IBT1If3 j
aU.hASj rEoMj)~\4& while(!bStop) i9RAbt Q} { (aeS+d x write_nPos(); ro%Jg Utility.sleep(500); l;~b:[r breakWhile = true; s*g`| E{M 4X}.aZO&b =._V$:a6o for(int i=0;i<nStartPos.length;i++) ~W>3EJghR, { A$7j B4 if(!fileSplitterFetch.bDownOver) HQy:,_f@ { cF2!By3M breakWhile = false; ++gWyzD break; 762c`aP_( } 6E)emFkQ } TJO?BX_9 if(breakWhile) rk E;OU break; iAl.(j j;7:aM"BQW D\4pLm"!v //count++; Pg''>6w> //if(count>4) hy]8t1894 // siteStop(); 0XSMby?t` } ` P,-NVB "9^OT (zmLMG(R System.err.println("文件下载结束!"); : Yb_ } 2]UwIxzR catch(Exception e){e.printStackTrace ();} !*\J4bJe } "Dt:
8Nf^
Q"Pl)Q\ x@p1(V. //获得文件长度 u]766<Z public long getFileSize() ]YciLc( { KHTR oXt int nFileLength = -1; >7$h try{ H#+2l?D:" URL url = new URL(siteInfoBean.getSSiteURL()); EK%J%NY HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~_]i'ii8 httpConnection.setRequestProperty("User-Agent","NetFox"); 3nbTK3, ty>9i]Y- N hY`_?) int responseCode=httpConnection.getResponseCode(); GzN /0:b if(responseCode>=400) a
!yBEpMo { hU~up a<dD processErrorCode(responseCode); =^5#o)~BB return -2; //-2 represent access is error d%~OEq1i" } 1)BIh~1{p N|3a(mtiZ' J?$`Tnx^ String sHeader; J5zKwt kZK1{ KlGmO;k for(int i=1;;i++) 84g8$~M { BGrV,h^ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ] :. //Utility.log(in.readLine()); r}4 sHeader=httpConnection.getHeaderFieldKey(i); e`eh;@9p if(sHeader!=null) <*@!>6mS { GTocN1,Z~a if(sHeader.equals("Content-Length")) 5{|tE! { ,GYK3+}Z nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); .P(Ax:g break; ~5;2 ni8n } 9zD,z+ } ?~9o2[ else f~R`RBZ]9 break; iGw\A!}w\ } ,opS)C$ } l|S_10x5 catch(IOException e){e.printStackTrace ();} }08Sv=XM catch(Exception e){e.printStackTrace ();} (o2.*x d9.I83SS nhLw&V3y Utility.log(nFileLength); _x]q`[Dih FwpTQix! q71V]! return nFileLength; m0,TH[HWGF } *s%M!YM HXP/2&|JY 9zNMv- //保存下载信息(文件指针位置) Z&6*8#wn private void write_nPos() Rebo.6rG { G\B:iyKl try{ Vif)e4{Pn output = new DataOutputStream(new FileOutputStream(tmpFile)); bcUa'ZfN< output.writeInt(nStartPos.length); ?hOvY) for(int i=0;i<nStartPos.length;i++) `G<|5pe { |H'wDw8 // output.writeLong(nPos); H03R?S9AQ output.writeLong(fileSplitterFetch.nStartPos);
, D} output.writeLong(fileSplitterFetch.nEndPos); *EF`s~ } 4Jk[X>I~ output.close(); o<L=l Q } KS R'X0' catch(IOException e){e.printStackTrace ();} axM(3k.n catch(Exception e){e.printStackTrace ();} D"<>!]@(a } @0D o(@^V!}V ]?k\ qS //读取保存的下载信息(文件指针位置) {S"! c. private void read_nPos()
|!xqkmX { gCZm7dgo try{ j|IvDrm# DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); uX8G<7O^ int nCount = input.readInt(); *d}{7UMy# nStartPos = new long[nCount]; '^`% nEndPos = new long[nCount]; | W<jN for(int i=0;i<nStartPos.length;i++) r}|a*dh'R { 5iZ;7
?( nStartPos = input.readLong(); y:VY8a 4 nEndPos = input.readLong(); o>y@1%aU } dG%{&W9
input.close(); I6Oc`S!L } 0F%V+Y\R catch(IOException e){e.printStackTrace ();} qFwAzW;" catch(Exception e){e.printStackTrace ();} !4}Wp. } HEs .pET\ #OsUF,NU -f=4\3y3p private void processErrorCode(int nErrorCode) g)=-%n'RoE { BUU ) Sz System.err.println("Error Code : " + nErrorCode); #F:\_!2c } 4=ZN4=(_[ tREC)+*\ hEfFMi=a` //停止文件下载 S*(ns<L public void siteStop() ngl8) B { ?dQ#%06mn bStop = true; ^dRgYi"(A for(int i=0;i<nStartPos.length;i++) wQrD(Dv(yA fileSplitterFetch.splitterStop(); RO.bh#A$ !UX7R\qu| FK,Jk04on } dRXdV7-! } x}jiHV@= //负责部分文件的抓取 'ExTnv ~ **FileSplitterFetch.java ;f~z_3g */ Z]k+dJ[- package NetFox; vU!<-T# V w5@)l*f (lLCAmK5? import java.io.*; '9Xw_1B import java.net.*; H 2UR k^Uk=)9 ~.<}/GP] _ public class FileSplitterFetch extends Thread { v$EgVcK
"xE;IpO[ Ov|Uux String sURL; //File URL m.>y(TI long nStartPos; //File Snippet Start Position )Zit6I long nEndPos; //File Snippet End Position W%P0X5YQ int nThreadID; //Thread's ID !K/zFYl boolean bDownOver = false; //Downing is over z1~FE boolean bStop = false; //Stop identical Y[`%j\= FileAccessI fileAccessI = null; //File Access interface j(`V&S ZN-5W|' O Yf[GpSej public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ~n9- { ul ag$ge this.sURL = sURL; <UBB&}R0 this.nStartPos = nStart; AGgL`sP this.nEndPos = nEnd; -LMO
f[v? nThreadID = id; .6y(ox|LL fileAccessI = new FileAccessI(sName,nStartPos);//定位 k+As#7V } tzSg`7H! ?KXgG'!! b`X"yg+ public void run() Iw;J7[hJ&$ { 5JA5:4aev while(nStartPos < nEndPos && !bStop) o3xfif { P:tl)ob bPo*L~xdk H_+!. try{ \&1Di\eL URL url = new URL(sURL); YLe$Vv735 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Mf.:y httpConnection.setRequestProperty("User-Agent","NetFox"); XjV,wsZ= String sProperty = "bytes="+nStartPos+"-"; O-YB+~"3Z httpConnection.setRequestProperty("RANGE",sProperty); ]5hGSl2 Utility.log(sProperty); zoO9N oUHW ~riV9_- .5YIf~!59 InputStream input = httpConnection.getInputStream(); P1}Fn:Xe%7 //logResponseHead(httpConnection); b}5hqIy '3V?M;3|K o _DZ byte[] b = new byte[1024]; 9lCZi? int nRead; ,L,?xvWG while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) zFGZ;?i { +]N PxUa nStartPos += fileAccessI.write(b,0,nRead); 6$"0!fl> //if(nThreadID == 1) AHtLkfr(r // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Q7@
m.w%` } <aEY=IF4 oB] z\Y-8a.] Utility.log("Thread " + nThreadID + " is over!"); /Jw65 e bDownOver = true; 4e 55 //nPos = fileAccessI.write (b,0,nRead); uZ7~E._ } ziBg' catch(Exception e){e.printStackTrace ();} L?p,Sy<RI } _b1w<T
` } Bi|XdS$G K h;jiK ! @Zd/>' //打印回应的头信息 ZsikI@? public void logResponseHead(HttpURLConnection con) iv]*HE { *C n `pfO for(int i=1;;i++) jM DG { wa}\bNKQk String header=con.getHeaderFieldKey(i); om'DaG`A if(header!=null) +:fr(s!OE //responseHeaders.put(header,httpConnection.getHeaderField(header)); rezH5d6z62 Utility.log(header+" : "+con.getHeaderField(header)); =;"$t_t else #{u> break; @x
z?^20N } Z )f\^ } FtL{f=
}I;5yk,o ><Z`)}f public void splitterStop() ;p}X]e l} { D/=
AU bStop = true; auP6\kpMe } GMO|A.bzzN .|g67PH= A(>kp=~ } ]jL`*tI\S 3d0Yq Q #%C)7) /* @hE$x-TP0 **FileAccess.java HX]pcX^K *//文件访问(定位,写) umD[4aP~; package NetFox; A&~<qgBTp import java.io.*; E6NrBPm >9v?p= (ON_(MN
public class FileAccessI implements Serializable{ j.L`@ D3+UV+&R/ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 xRx8E;Q@h? RandomAccessFile oSavedFile; EL[N%M3 long nPos; .g6DKjy> M~1 n# DlXthRM public FileAccessI() throws IOException :U7m@3czU { P_f>a?OL: this("",0); 5wws8w } ;f8$vW];
`xpU /:j9#kj public FileAccessI(String sName,long nPos) throws IOException 8v)PDO~D}A { uJP9J U
oSavedFile = new RandomAccessFile(sName,"rw"); `RG_FS"v this.nPos = nPos; &E>zvRBQ oSavedFile.seek(nPos); 8I'Am"bc\ } q3s
+?& t,2Q~ied= faVR % public synchronized int write(byte[] b,int nStart,int nLen) j`9+pI { MFyMo int n = -1; z!={d1u#T try{ @fH?y Z=> oSavedFile.write(b,nStart,nLen); kM`!'0kt n = nLen; !y>MchNv } \5wC&|WEB catch(IOException e) :%?\Wj5HW { |$vhu`]Z@^ e.printStackTrace (); I=,u7w`m } ,DT=( cQaEh1n W~1MeAI return n; GoGo@5n(Z } i*JbFukG Q7]VB p4 }Dig'vpMx } btC.EmX 1z\>>N$7B T F !Lp: /* IJ%S[> **SiteInfoBean.java
jJjD) */ *Iu
.>nw package NetFox; ZhWtY # Z*nc0C a?IL6$z public class SiteInfoBean { Bpjwc<U J@{yWgLg $cLtAo^W private String sSiteURL; //Site's URL S;"7d private String sFilePath; //Saved File's Path .kT5 4U;{ private String sFileName; //Saved File's Name A|BvRZd private int nSplitter; //Count of Splited Downloading File nx(O]R,Sw L}&U%eD }xl
@:Qo public SiteInfoBean() nJTV@mXVq {//nSplitter的缺省值为5 .>-`2B*/ //default value of nSplitter is 5 GB+U>nf this("","","",5); *q%)q } VxOrrs7Z &\\iD :J x0])&':! public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) `nO!_3 { S?}@2[ sSiteURL= sURL; RN?z)9! sFilePath = sPath; iz`u@QKc% sFileName = sName; a; Ihv#q this.nSplitter = nSpiltter; 89B1\ff `'u|4pRFs :B=p%C } '\:?FQ
C /hue]ZaQq IkSzjXE{ public String getSSiteURL() t/,k{5lX { Cm;WQuv@ return sSiteURL; 8KpG0DC } z,nRw/o ~>@Dn40 -v9V/LJ public void setSSiteURL(String value) `@{qnCNQ { @|&P#wd.u sSiteURL = value; * xs8/? } ~BVg#_P 7
:s6W%W1* DTdL|x.{ public String getSFilePath() _Y*:
l7 { cI3uH1;# return sFilePath; z(^p@&r)F } U~SK 'R A+j~oR AZ5c^c) public void setSFilePath(String value) #Dx$KPD { bwo" s[w sFilePath = value; O'deQq[ } :L9\`&}FS (jkjj7a }k}5\%#li5 public String getSFileName() J4te!, { 8zz-jkR return sFileName; 0Bn$C,- } MB\vgKY :Ke~b_$Uy- xH\'gli/ public void setSFileName(String value) \O?#gW\tR { kX{c+qHM sFileName = value; ~K^Z4 } &hs)}uM&$ GZ@!jF>!u knypSgk_ public int getNSplitter() K:P gkc { bTKzwNx return nSplitter; '<m[ } 9Dd/g7 }6eWdm!B n$}c+1
public void setNSplitter(int nCount) a2iaP { jHB,r^:' nSplitter = nCount; f7XmVCz1 } p`{9kH1m e } $,icKa [HIg\N$I8C k+-u4W /* 6R@
v>} **Utility.java G\TyXq_4 */ 8Md*9E#J(" package NetFox; <"CG%RGP =Ze~6vS, %Q}#x public class Utility { Jx_ OT C hW>@jT"t1C Kd;|Z public Utility() qX:54$t { g<KBsz!{ Czb@:l%sc P 2;j>=W } g;=jZ ep[7#\}5 //线程睡眠 SL:o.g(>4 public static void sleep(int nSecond) ?{cF'RB. { !e.@Xk.P6 try{ 34]f[jJ| Thread.sleep(nSecond); ZWmmFKFG. } BWL~)Hx catch(Exception e) qVJV 9n { J_U1eSz<j e.printStackTrace (); Cb.~Dv
! } y"!+Fus9 } V}7I?
G ngEjbCV+ //日志 "v jFL9 public static void log(String sMsg) yBauK-7*c { N+!{Bt* System.err.println(sMsg); {:od=\*R } 8!me$k& D4n~2] ]Rnr>_>x; public static void log(int sMsg) Z'WoChjM { ;{BELv-4 System.err.println(sMsg); 2={`g/WeE } u;~/B[ } sEe^:aSN <J {VTk ~ GIo&zPx /* 5x4JDaG2 **TestMethod.java E+>Qpy */ z{``v|K package NetFox; 6!Ji-'\" ;2)@NH t1g)Y|@d public class TestMethod { A(Ugam~} F7# bPOehvK/ public TestMethod() -`iZBC50 { ///xx/weblogic60b2_win.exe
5 ah]E try{ o*I=6`j SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); TS$ 2K //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Q>JJI:uC4 SiteFileFetch fileFetch = new SiteFileFetch(bean); :%xiH%C> fileFetch.start(); gHvxmIG } 6/.-V1*O catch(Exception e){e.printStackTrace ();} ?$pp% U $X"W' id&; } [)#,~L3 J'b*^K 7DKbuUK public static void main(String[] args) W84JB3p { y&-j NOKLM new TestMethod(); EmVE<kY. } "ln(EvW } )@\= pE.H 点击下载更多相关资料
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