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/* 9u B?-. **SiteFileFetch.java 0#,a#P */ xY^sC56Z package NetFox; `ONjEl import java.io.*; Gm=qn]c import java.net.*; )dXa:h0RZ [{znwK@ "TV'}HH public class SiteFileFetch extends Thread { h)KHc/S f98,2I(>`+ RJrz ~,} SiteInfoBean siteInfoBean = null; //文件信息Bean {ZJO5* long[] nStartPos; //开始位置 bz4Gzp'6k long[] nEndPos; //结束位置 6K/RO) FileSplitterFetch[] fileSplitterFetch; //子线程对象 zC?'Qiuh* long nFileLength; //文件长度 "s2_X+4oY boolean bFirst = true; //是否第一次取文件 L$ZjMJ boolean bStop = false; //停止标志 CWj_K2=d File tmpFile; //文件下载的临时信息 ~6[?=mOi' DataOutputStream output; //输出到文件的输出流 S$6|KY u 0Y.z //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ?YhDjQs public SiteFileFetch(SiteInfoBean bean) throws IOException *FS8]!Qg { [);oj< siteInfoBean = bean; [GwAm>k //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); wj)LOA0 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); &qv~)ZM$ if(tmpFile.exists ()) %pC<T*f { #NS|9jW bFirst = false; \Z-th,t read_nPos(); E
C?}iP } qt"D!S_ else -t`kb*O3` { E)"19l|}B nStartPos = new long[bean.getNSplitter()]; YagfCi ? nEndPos = new long[bean.getNSplitter()]; <Xf6?nyZ( } e~r/!B5X cc@W
6W tpfgUZ{ <r%K i`u(p } ( }-*irSsj ;kFD769DLw ?=u?u
k<- public void run() wQ_4_W { #M,&g{ //获得文件长度 Y
},E3< //分割文件 8-Abg:) //实例FileSplitterFetch 2d)Dhxzxk //启动FileSplitterFetch线程 eYOY //等待子线程返回 144Y. try{ ZU4=&K if(bFirst) 4TtC~#D: { ^y+k6bE nFileLength = getFileSize(); coP->&(@U# if(nFileLength == -1) Q(|@&83]. { f56yI]*N=< System.err.println("File Length is not known!"); 7?P'f3)fG } %hB-$nE else if(nFileLength == -2) I
_nQTWcm { |9*Rnm_ System.err.println("File is not access!"); E`HoJhB } fSo8O else i~@gI5[k+ { ]RVu[k8 for(int i=0;i<nStartPos.length;i++) N$fP\h^AR { 5100fX} nStartPos = (long)(i*(nFileLength/nStartPos.length)); bz*@[NQ } kmQ:wf: for(int i=0;i<nEndPos.length-1;i++) L&\W+k { xIdb9hm< nEndPos = nStartPos[i+1]; Ly=. } 6pt,]FlU nEndPos[nEndPos.length-1] = nFileLength; ;jPsS^X } eI8o#4nT } /s?%ft#-9o V@'Xj .ze *5'8jC"2g //启动子线程 1k[_DQ=^l1 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; gtKih for(int i=0;i<nStartPos.length;i++) 9z,sn#-t { ZCCCuB fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Xo PJ?63 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), x{H+fq,M nStartPos,nEndPos,i); 3u@,OE Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); '}cSBbl&/n fileSplitterFetch.start(); +17!v_4^ } rO87V!Cj // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 01(U)F\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); '5}hm1, // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", #X(2 nEndPos = " + nFileLength); Fe8X@63 // fileSplitterFetch[nPos.length-1].start(); VL#:oyWA }T_"Vg q #}Qe{4L //等待子线程结束 yQJ0",w3o. //int count = 0; P@y)K!{Nk //是否结束while循环 ~-"CU:$o boolean breakWhile = false; Z~:)hwF ?e%*q^~Cu PqspoH
0OI while(!bStop) b+Q{Z* { 3MQHoxX write_nPos(); U|wST&rU| Utility.sleep(500); =CzGI|pb breakWhile = true; F=\
REq `;mgJD &Wy>t8DIK for(int i=0;i<nStartPos.length;i++) ^"Bhp:o2 { 4m~y%>
& if(!fileSplitterFetch.bDownOver) 4 95Y<x}= { u<j;+-]8h breakWhile = false; 4(8c L?J`0 break; KKwM\ } <gPM/4$G } vhZXgp0X if(breakWhile) CG uuadNI break; +B{u,xgg hUpour
|b z/#,L!Z3 //count++; zE;|MU@| //if(count>4) WOPIF~1v // siteStop(); Q 1i5"'][ } 7<LuL gpq ,rOIK "=2\kZ System.err.println("文件下载结束!"); >QDyG8* } H2iIBGu|L catch(Exception e){e.printStackTrace ();} f0eQq;D$K } ,b^Y8_ltoT }
e w{WD $c*fbBM(&n //获得文件长度 7!qeIz public long getFileSize() ;nl JD# { 5NkF_&S_1 int nFileLength = -1; e!=7VEB try{ \[!{tbK`2 URL url = new URL(siteInfoBean.getSSiteURL()); YdV.+v(30 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); G%Lt>5*!nE httpConnection.setRequestProperty("User-Agent","NetFox"); kM-8%a2i ZKW1HL ]m |`yU \ int responseCode=httpConnection.getResponseCode(); 4~Q<LEly if(responseCode>=400) 5xT, O { xqdkc^b processErrorCode(responseCode); ,or;8aYc# return -2; //-2 represent access is error @Y,t] } ,1~B7Zd J_a2DM6d LQqba4$ String sHeader; ;7[DFlS\P Q@p'nE,
wBlE!Pm for(int i=1;;i++) "z6p=B"?3 { o^5UHFxTCB //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); {Mo[C% //Utility.log(in.readLine()); r:rPzq1 sHeader=httpConnection.getHeaderFieldKey(i); f:nXE&X[ if(sHeader!=null) ;"f9"
{ 1A93ol=
if(sHeader.equals("Content-Length")) ys) { 7aRy])x nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ']Czn._ break; |-v/ } vWW Q/^ } /: -ig .YY else U e-AF# break; e Vj 8u } gjiS+N[ } 8\)4waz$ catch(IOException e){e.printStackTrace ();} -0'<7FSQ catch(Exception e){e.printStackTrace ();} H[R6 ?H@$F <}mA>c'k fyZtwl@6w# Utility.log(nFileLength); amQiH!}8R )-6>!6hZ b;`MHEzw&q return nFileLength; pcd?6jh8 } t&yuo E i*xVD`x ~ [ P*L`F //保存下载信息(文件指针位置) / H GPy private void write_nPos() ](+u'8 { AHa]=ka> try{ Sw{rNzh%$ output = new DataOutputStream(new FileOutputStream(tmpFile)); FIJ]` output.writeInt(nStartPos.length); OK@yMGz1I for(int i=0;i<nStartPos.length;i++) fTy{`}> { x {Rj2~KC // output.writeLong(nPos); W$}2
$}r0U output.writeLong(fileSplitterFetch.nStartPos); Kk \,q? output.writeLong(fileSplitterFetch.nEndPos); `)i4ZmE| } 3! KyO)8 output.close(); !(_qM } >'3nsR catch(IOException e){e.printStackTrace ();} /Zz[vf catch(Exception e){e.printStackTrace ();} h-03]M#8= } kCZ'p Vvn~G.&) 0sq?>$~Kc* //读取保存的下载信息(文件指针位置)
tB0f+ wC private void read_nPos() |l~#qeZ% {
4f213h try{
s_!F`[ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); R|\kk?,u int nCount = input.readInt(); q) e*eN nStartPos = new long[nCount]; 3|Y.+W nEndPos = new long[nCount]; 7%|HtBXv^ for(int i=0;i<nStartPos.length;i++) Jk`0yJi$q { U@".XIDQ nStartPos = input.readLong(); cS",Bw\ nEndPos = input.readLong(); 4g+o/+6!4 } [WR*u\FF input.close(); Jb!s#g } o3:h!(#G catch(IOException e){e.printStackTrace ();} wA";N=i= catch(Exception e){e.printStackTrace ();} 2 o5u02x } Uot LJa `!
)^g/>0i ~kZ?e1H private void processErrorCode(int nErrorCode) p+F>+OQ* { X$<CIZ System.err.println("Error Code : " + nErrorCode); IP#qT
`=} } 3Q#3S 1[(/{CClB WQNFHRfO*n //停止文件下载 KhNE_.
Z public void siteStop() z|m-nIM { 5Noy~; bStop = true; ^B'N\[ for(int i=0;i<nStartPos.length;i++) t|59/R fileSplitterFetch.splitterStop(); N}\3UHtO AYoLpes 810uxw{\ } MJcWX|(y } M^y5 Dep //负责部分文件的抓取 oazy%n(KZ **FileSplitterFetch.java q}p
(p( N */ Y-P?t+l package NetFox; kXZG<? jY$3 10..<v7 import java.io.*; #D Oui] import java.net.*; 4nD U-P#f 82w=t ,M9Hdm public class FileSplitterFetch extends Thread { cD9axlJ =\x(Rs3 \r&9PkHWo String sURL; //File URL iR{*XE
long nStartPos; //File Snippet Start Position R?J=5tO long nEndPos; //File Snippet End Position
}&/_ S int nThreadID; //Thread's ID L[}Ak1 A boolean bDownOver = false; //Downing is over I:o.%5) boolean bStop = false; //Stop identical @l@erCw@ FileAccessI fileAccessI = null; //File Access interface w7Vl,pN, JrwR:_+|
W[oQp2 = public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException <iznB8@ { ? VHOh9|AT this.sURL = sURL; 4w(#`'I> this.nStartPos = nStart; ~|=goHmm[ this.nEndPos = nEnd; eGlPi| nThreadID = id; 5VK.Zs\ fileAccessI = new FileAccessI(sName,nStartPos);//定位 *ta?7uSiT } ;Km74!.e7 = ^_4u%} yq\p%z$: public void run() (b;*8 { 6%fF6 while(nStartPos < nEndPos && !bStop) vFl06N2 { -gy@sSfvkv vjO@"2YEw "DU1k6XC try{ '(yjq< URL url = new URL(sURL); ]Qh0+!SdG HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); n 8'#'^| httpConnection.setRequestProperty("User-Agent","NetFox"); %H8s_O String sProperty = "bytes="+nStartPos+"-"; Z-rHYfa4 httpConnection.setRequestProperty("RANGE",sProperty); PuGc{kt Utility.log(sProperty); eaCh;IpIf 2H2Yxe7? - I&|J +B?# InputStream input = httpConnection.getInputStream(); _/@u[dWeL //logResponseHead(httpConnection); |Y]4PT#EE ?Y\hC0a60 oS Apa byte[] b = new byte[1024]; pF}WMt int nRead; ><3!J+<? while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) vZ/Bzy@| {
ZBl!7_[_ nStartPos += fileAccessI.write(b,0,nRead); oeIza<:=R //if(nThreadID == 1) ~Rk~Zn // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); vOi4$I~CJ } g]E>e v{` ?)?}^ %e%VHHO| Utility.log("Thread " + nThreadID + " is over!"); iFkXt<_A bDownOver = true; X>4qL'b:z //nPos = fileAccessI.write (b,0,nRead); )HJ#|JpxC } Y]])Tq;h5 catch(Exception e){e.printStackTrace ();} Xjs`iK=w } +jN%w{^= } b&\f 8xZ c%vtg.A 8\B]! //打印回应的头信息 wC`+^>WFo public void logResponseHead(HttpURLConnection con) gvu1 { vj hh4$k for(int i=1;;i++) &$8YW]1M { %8$ldNhV String header=con.getHeaderFieldKey(i); |cIv&\ x if(header!=null) g8L{xwx< //responseHeaders.put(header,httpConnection.getHeaderField(header)); :oO
?A Utility.log(header+" : "+con.getHeaderField(header)); ;?.w!|6 else o#9Q
break; G e+T[ } crl"Ec } TAp8x "'v^X!" dBNx2T}_0 public void splitterStop() :hFKmoy# { RAB'%CY4 bStop = true; G;Py%8 } GvI8W)d3,R ,4H/>yPw pX?/=T@ Bw } (Qf. S{; KGJ *h 2wwJ>iR` /* "X,*VQl: **FileAccess.java P^[y~I#{ *//文件访问(定位,写) V[2} package NetFox; e6gLYhf& import java.io.*; d3"QCl \dJOZ2J<z }*?,&9/_) public class FileAccessI implements Serializable{ UU*v5& ,#U[)}im //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 u\Y3h:@u RandomAccessFile oSavedFile; )=pa* long nPos; ],s{%a5wC t W}"PKv #\Zr$?t|V public FileAccessI() throws IOException aUk]wiwIR9 { 7j8lhrM}^ this("",0); 6uIgyO*;k } aM+Am,n`@ >!Dp'6 *Gul|Lp$<I public FileAccessI(String sName,long nPos) throws IOException ,ygUy] { 'P)c'uqd# oSavedFile = new RandomAccessFile(sName,"rw"); nh*6`5yj this.nPos = nPos; jss.j~8 oSavedFile.seek(nPos); L7]o^p{g}Q } "x3x$JQZy J`[gE`d XAZPbvG|$ public synchronized int write(byte[] b,int nStart,int nLen) [}!0PN?z~A { +kN,OK~ int n = -1; =0az5td try{ 5W0s9yD oSavedFile.write(b,nStart,nLen); Z/czAr@4 n = nLen; u+^KP>rM( } +)LCYDRV7 catch(IOException e) [*M': { ,0c]/Sd*p e.printStackTrace (); k~F;G=P } OG9 '[o`8 )-0+O=v 6j!idA!' return n; 1'N<ITb } \SoT^PW @lWYc`>} 8L+A&^qx } D5!#c-Y- TF9A4 --EDr>'D5P /* xS>vmnW **SiteInfoBean.java mfG m>U */ 9c%CCZ package NetFox; wX$|(Y} Ii&p v ,"Fl/AjO public class SiteInfoBean { cUr!U\X[ g)R 2V 9g\;L:' private String sSiteURL; //Site's URL R$+p4@?S private String sFilePath; //Saved File's Path J.'%=q(Sb private String sFileName; //Saved File's Name *{P/3yH private int nSplitter; //Count of Splited Downloading File )ki
Gk}2 3H0B+F2XQ #4JLWg public SiteInfoBean() K8Q3~bMf {//nSplitter的缺省值为5 XK\3"`kd //default value of nSplitter is 5 v K[%cA" this("","","",5); jFJ}sX9] } hO&_VCk H\qZu%F' {z\K!=X/ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) PR]b]= { reNf?7G+m sSiteURL= sURL; N#ZWW6 sFilePath = sPath; zj(V\y&H sFileName = sName; -jy0Kl/p this.nSplitter = nSpiltter; KGcjZx04! ".%d{z}vz =JW-EQ6[T } k|\M(Z*(P [`oVMR ]ly" K!1, public String getSSiteURL() pu+Q3NfR { f*B-aj# return sSiteURL; w]yVNB } R^$|D)( ,`k&9o7 fggs
;Le public void setSSiteURL(String value) kaXq. { -YAtM-VL sSiteURL = value; rv(?%h`
} g27'il CUYA:R<) W.?/p~ public String getSFilePath() $\Y&2&1s { <JH,B91 return sFilePath; uBa<5YDF } 4$[o; t> n\l?+)S * @$T$ hMl public void setSFilePath(String value) M@{#yEP { 5N;'CAk sFilePath = value; n)98NSVDbT } T" W<l4i- SXZ9+<\ ~cCMLK em public String getSFileName() P+}~6}wJE { jh)@3c return sFileName; xF8n=Lc } DJL.P6 -W 1wKXOy=v0 PnA{@n\ public void setSFileName(String value) o#e8
Piw { 0DmA3 sFileName = value; hj9TiH/+ } AtG~!)hG oNyYx6q:Q pWGR#x' public int getNSplitter() G/<zd) { QMsq4yJ)% return nSplitter; () _RLA } Giv,%3' 3-
Kgz p8~lGuH public void setNSplitter(int nCount) OL>>/T { LJGpa )( nSplitter = nCount; 6M*z`B{hV } 1+;bd'Ie } nc k/Dw sv%X8 `Npa/Q /* UhDQl%&He **Utility.java 'K ?h6?# */ +Y sGH~jX package NetFox; 9efDM {5E8eQ My8d%GfM public class Utility { SH{@yS[c! T(D6'm:X iWf+wC| public Utility() Q"XDxa'7" {
/:4J BV~J*e >zW2w2O3 } D$}8GYq rFg$7 //线程睡眠 "[_j8,t` public static void sleep(int nSecond) *(OG+OkC { ;'n%\*+fHH try{ \G gh 95y Thread.sleep(nSecond); 2LtDS?)@ } U#[&( catch(Exception e) eJ?oz^ { !<p,G`r e.printStackTrace (); ccag8LC } =
j1Jl^[ } k:Pn.< JQ1MuE' //日志 Qo#]Lo> \g public static void log(String sMsg) 7S a9 { ,UY1.tR( System.err.println(sMsg); Jl~ *@0( } TJ"-cWpO1 6m:$mhA5 BiYxI{V FD public static void log(int sMsg) hC\
l
\y { z\]Z/Bz:6 System.err.println(sMsg); k H.dtg_ } ~7PD/dre } B)JMughq_ 8fXiadP# :0J`4 /* o}rG:rhIh **TestMethod.java LiG$M{ 0 */ |R}=HsYey package NetFox; d_!Z /M, (P|[<Sd o$No@~%v public class TestMethod { pe?)AiTZ: 4?R979 /$c87\
public TestMethod() ix!xLm9\ { ///xx/weblogic60b2_win.exe dQ`Tt- n try{ +RooU?Aq SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); U^dfNi@q //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ]fM|cN8(zM SiteFileFetch fileFetch = new SiteFileFetch(bean); E5ce=$o fileFetch.start(); l f>/ } xo[o^go catch(Exception e){e.printStackTrace ();} b84l`J T8^9*]:@c! [^qT?se{ } &hYgu3O NM3;l}Y8
!VGG2N8 public static void main(String[] args) 1/}H
0\9' { ,2FK$:M\ new TestMethod(); Z8SwW<{ $ } | b'Ut)E } 6<lo0PQ"Z 点击下载更多相关资料
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