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/* wkb$^mU **SiteFileFetch.java [V}, tO|
*/ Ng=ONh
package NetFox; \RG!@$i import java.io.*; 9A$m$ import java.net.*; KZ:hKY@q h<l1U'Bn7 NXk!qGV2 public class SiteFileFetch extends Thread { p,W_'?,9 <48<86TP \}"m'(\c SiteInfoBean siteInfoBean = null; //文件信息Bean >U!*y4 long[] nStartPos; //开始位置 5M_Wj*a}7 long[] nEndPos; //结束位置 l=m(mf?QBg FileSplitterFetch[] fileSplitterFetch; //子线程对象 rf
K8q'@ long nFileLength; //文件长度 Ol/N}M|3 boolean bFirst = true; //是否第一次取文件 n"D ?I boolean bStop = false; //停止标志 xge7r3i File tmpFile; //文件下载的临时信息 #JW+~FU` DataOutputStream output; //输出到文件的输出流 [(mlv42" 3iX?~ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) |U'I/A public SiteFileFetch(SiteInfoBean bean) throws IOException *_-'/i { j`>^1Q siteInfoBean = bean; !CY&{LEYn0 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); [iS$JG-
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); iCQ>@P]nE if(tmpFile.exists ()) 8|g<X1H{M { 8y2+$ bFirst = false; dK9Zg,DZL read_nPos(); ]uh3R{a/ } LHYLC>J else \2v"YVWw
{ nv/[I,nw nStartPos = new long[bean.getNSplitter()]; Gh(
A%x) nEndPos = new long[bean.getNSplitter()]; t?eH'*> }
iThSt72 gzn^#3 b a2@c%i WcUJhi^\C } ^TdZ*($5 ~N0sJ% :#t*K6dz public void run() *%FA:Y { y/_XgPfWU //获得文件长度 j;~%lg=) //分割文件 A*yi"{FLi //实例FileSplitterFetch ;{Ux_JEg //启动FileSplitterFetch线程 Kq6jw/T //等待子线程返回 mI1H! try{ p*3; hGp6 if(bFirst) chI.{Rj { PL=^}{r nFileLength = getFileSize(); @C8DZ5) if(nFileLength == -1) HL K@xKD< { _8?o'<!8?^ System.err.println("File Length is not known!"); =r.
>N\ } 6;b9swmh else if(nFileLength == -2) XP?rOOn { ssQ BSbx System.err.println("File is not access!"); 2\<.0 } ps|)cW3` else 1R%1h9I4' { ro~+j}* for(int i=0;i<nStartPos.length;i++) .?W5{U { @z`@f"l nStartPos = (long)(i*(nFileLength/nStartPos.length)); JK_OZ } ))h6~1` for(int i=0;i<nEndPos.length-1;i++) SX0_v_%M { Q /x8 #X nEndPos = nStartPos[i+1]; vIGw6BJI } T]9\VW4 nEndPos[nEndPos.length-1] = nFileLength; es:2M |#O } aptY6lGv-| } tOl e>] K95;rd %3Z/+uT@v] //启动子线程 }?@5W, fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; e&<yX for(int i=0;i<nStartPos.length;i++) 0ezYd S~o { {Tp2H_EG fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), +>f<EPGn siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Q9F) nStartPos,nEndPos,i); W&Y"K)` Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); VyLH"cCv fileSplitterFetch.start(); (=x"Y{% } D@ek9ARAq // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), )u:Q)
%$t siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); #o`Ny4sq/ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", `|Z}2vo;j nEndPos = " + nFileLength); PXKJ^fa // fileSplitterFetch[nPos.length-1].start(); <cN~jv-w$ %|W.^q l ,|%7- //等待子线程结束 JH,/jR //int count = 0; sYSLmUZ{ //是否结束while循环 k"UO c= boolean breakWhile = false; l:B;zi`)oB L:nXW z wucV_p.E while(!bStop) OW;tT=ql { $^/0<i$ write_nPos(); z9/G4^qF Utility.sleep(500); BHDML.r }M breakWhile = true; 3Hi+Z}8 ],etZ%z& >`RRP}u=u for(int i=0;i<nStartPos.length;i++) Ut@RGg+f8 { yBpk$ if(!fileSplitterFetch.bDownOver) eU+ {*YJg { "8 )z=n breakWhile = false; f>j wN@( break; j V3)2C} } h!@,8y[B } E$s/]wnr[ if(breakWhile) kh$_!BT break; #Il_J\# t0&@h\K SuBeNA[& //count++; lJ;J~> //if(count>4) EV M7Q> // siteStop(); NcS.49 } w42OF7f b,H[I!. % ;zTuKex~ System.err.println("文件下载结束!"); ={2!c0s } nwI3| & catch(Exception e){e.printStackTrace ();} B:TR2G9UT } e0,'+;*=g imB# Eo4eY Nil}js27 //获得文件长度 <~U4* public long getFileSize() gwkb!#A { yY{kG2b, int nFileLength = -1; @r^!{ try{ ]w).8=I URL url = new URL(siteInfoBean.getSSiteURL()); <z+:j!~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
%V G/ httpConnection.setRequestProperty("User-Agent","NetFox"); BcWcdr+}9 `bI)<B -XK0KYhgW int responseCode=httpConnection.getResponseCode(); F4#g?R::U if(responseCode>=400) JNI>VP[c { ?WI3/>:< processErrorCode(responseCode); I_)*)d44_ return -2; //-2 represent access is error o?Nu:&yE } +Lm4kA+aE5 lU]un&[N [onqNp String sHeader; BbOu/i| \kIMDg3} @`"AHt for(int i=1;;i++) ]DG?R68DQ { >QE{O.Z //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 9-1#( Y6S //Utility.log(in.readLine()); VaZn{z sHeader=httpConnection.getHeaderFieldKey(i); *O$CaAr\s if(sHeader!=null) gT+Bhr { =s97Z- if(sHeader.equals("Content-Length")) VL+C&k v] { '!h/B;*( nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); XE3aXK'R break; {QaNAR=) } /TQ}}
YVw } <lxD}DH= else 4DWwbO break; yq[Cq=rBk } n| O [a6G } zJlQ_U- ! catch(IOException e){e.printStackTrace ();} Yj(4&&Q catch(Exception e){e.printStackTrace ();} 7^TV~E# Iry 4NR@u\S Utility.log(nFileLength); X&m'.PA U]~^Z R :&XH?/Wi return nFileLength; E:E4ulak } 0[A9b,MMVO &NZfJs t/o N>mQG //保存下载信息(文件指针位置) NtGn88='{ private void write_nPos()
cS.i { w) ]H ^6 try{ Bvjl-$m!v output = new DataOutputStream(new FileOutputStream(tmpFile)); F51.N{' output.writeInt(nStartPos.length); &p
UZDjo? for(int i=0;i<nStartPos.length;i++) q6P
wZ_ { Vn=qV3OE] // output.writeLong(nPos); KLQTKMNv output.writeLong(fileSplitterFetch.nStartPos); 2GmpCy`L" output.writeLong(fileSplitterFetch.nEndPos); mY!iu(R1 } R\Z:n* output.close(); NF$\^WvYSP } qk(P>q8[ catch(IOException e){e.printStackTrace ();} g+8hp@a catch(Exception e){e.printStackTrace ();} 1n*W2:,z } ,.IEDF<& (WlIwKP qa >Ay|92e //读取保存的下载信息(文件指针位置) [&S}dQ" private void read_nPos() 7cg*|E@ { 7sNw try{ 1YxgR}7 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); vC;]jJb: int nCount = input.readInt(); 'BMy8 nStartPos = new long[nCount]; $K~LM8_CKy nEndPos = new long[nCount]; oT95^y\9 for(int i=0;i<nStartPos.length;i++) $3+PbYY { m(OvD! nStartPos = input.readLong(); r} _c nEndPos = input.readLong(); *~$~yM/~3U } #1-xw~_ input.close(); h:\oly\ } `Kl`VP=c catch(IOException e){e.printStackTrace ();} a@d=>CT$ catch(Exception e){e.printStackTrace ();} .4.pJbOg } ({}( qm ewsKH\#
@MR?6 n*k private void processErrorCode(int nErrorCode) !hxIlVd{ { X*oMFQgP System.err.println("Error Code : " + nErrorCode); *DI)? } (LAXM
x 2i#Sn' 1 (kBP(2V //停止文件下载 p^m5`{1]x public void siteStop() 0Sl]!PZR1 { -5G)?J/* bStop = true; 96Wp!]* for(int i=0;i<nStartPos.length;i++) uUR~&8ERX fileSplitterFetch.splitterStop(); M<?Q4a'Q 2h30\/xkU uv{P,]lK } Jc4L5*Xn/ } {y
kYW%3s //负责部分文件的抓取 XV>JD/K2 **FileSplitterFetch.java jMBiaX`F */ 5m$2Ku package NetFox; i@"e,7mSG o;F" {RZ a5'#j35 import java.io.*; |Yi)"- import java.net.*;
^{@![' pe0x""K iGXI6`F" public class FileSplitterFetch extends Thread { `xS{0P{uj m@Ev~~; $9
p!Y} String sURL; //File URL 7J$b$P0} long nStartPos; //File Snippet Start Position {0\,0*^p long nEndPos; //File Snippet End Position VU|dV\> int nThreadID; //Thread's ID T>>YNaUL boolean bDownOver = false; //Downing is over ;a"q'5+Ne boolean bStop = false; //Stop identical FeJr\|FT FileAccessI fileAccessI = null; //File Access interface tY W>t9 d~tuk4F FXKF\1`(H public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException "HMP$)d { nCg66-3A this.sURL = sURL; EEy$w1ec this.nStartPos = nStart; d4[(8}
x$/ this.nEndPos = nEnd; 01a-{&
nThreadID = id; u8b2$D fileAccessI = new FileAccessI(sName,nStartPos);//定位 !,$i6gm } 1nj(hg qf'm=efRyu uw\1b.r'B public void run() {WN(&eax { [ANuBNF while(nStartPos < nEndPos && !bStop) XP[uF ;w { -XoP ia2 pI`?(5iK6| ~.Ik#At try{ ^[:9fs URL url = new URL(sURL); W><Zn=G4)b HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); D?jk$^p~m# httpConnection.setRequestProperty("User-Agent","NetFox"); s)A<=)w/e String sProperty = "bytes="+nStartPos+"-"; %u{W7 httpConnection.setRequestProperty("RANGE",sProperty); kW3E =pr Utility.log(sProperty); igf)Hb;5 !%mAh81{&/ $Byj}^ ;1 InputStream input = httpConnection.getInputStream(); xk~IN%\ //logResponseHead(httpConnection); &tR(n$M@> jPvDFT^d/ td2/9|Q byte[] b = new byte[1024]; @=S}=cl int nRead; R while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) u?ek|%Ok {
8Chj
w wB nStartPos += fileAccessI.write(b,0,nRead); !4@G3Ae22 //if(nThreadID == 1) #4LFG\s // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); $
0|a; } U09.Y }'"Gr%jf( 0x2!<z Utility.log("Thread " + nThreadID + " is over!"); A?5E2T1L%. bDownOver = true; Zx }&c |Q //nPos = fileAccessI.write (b,0,nRead); Z]w#vLR } vQV K$n` catch(Exception e){e.printStackTrace ();} bte~c } {'+QH)w( } z"4]5&3A XK(`mEi
+KGZHO! //打印回应的头信息 =]R3& ]#n public void logResponseHead(HttpURLConnection con) 0X2@CPIFf { ij5g^{_T;8 for(int i=1;;i++) 8$N8}q% { jd`},X / String header=con.getHeaderFieldKey(i); tL
SN`6[: if(header!=null) xZ5M/YSyG //responseHeaders.put(header,httpConnection.getHeaderField(header)); wle@vCmr Utility.log(header+" : "+con.getHeaderField(header)); fBtm%f else W|k0R4K]] break; ~%u|[$ } $S*4r&8ZD } Z!xVgM{ UAF<m1 $$Vt7"F public void splitterStop() _;A $C( { q}uHFp/J bStop = true; W_O)~u8 } a\uie$"cr] /T^ JS F,Xo|jjj } gQSNU_o Z Vpfp}pL #BK 9 k>i /* xynw8;Y, **FileAccess.java 0XwHP{XaO *//文件访问(定位,写) :A46~UA!$ package NetFox; :^ i9] import java.io.*; pqM~l& jkAAqR R RIM`omM public class FileAccessI implements Serializable{ "yziXT@V d&cU* //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 SQsSa1 RandomAccessFile oSavedFile; M/D)".; long nPos; O/%< }3Sq fqz28aHh C`rLj5E% public FileAccessI() throws IOException e)nimq
{6 { G |*(8r() this("",0); +,+vkpL-% } a^qNJ?R! Y-piL8Xc Ou>u% public FileAccessI(String sName,long nPos) throws IOException q+SD6qM { 1PaUI#X"2F oSavedFile = new RandomAccessFile(sName,"rw"); A\rt6/ this.nPos = nPos; <HWS:'1 oSavedFile.seek(nPos); a~h:qpgc } bo"%0?3n 5\mTr)\R 1:C:?ZC#c public synchronized int write(byte[] b,int nStart,int nLen) n6WY&1ZE~ { 3OyS8` int n = -1; LL^q1)o try{ P=N$qz$U oSavedFile.write(b,nStart,nLen); $FH18 n = nLen; zxb/ } i[C~5}% catch(IOException e) 'PZ|:9FX! { 9DQ)cy e.printStackTrace (); TjWE_Bq]g } DVZdClAL >!e<}84b c97{Pu return n; uaw~r2 } o!TQk{0 ubMOD< %OR|^M } $lIWd idc`p?XP _Jz8{` " /* aeyNdMk- **SiteInfoBean.java D'<VYl"/ */ l@j.hTO< package NetFox; vgIpj3u %z]U LEYrZ *YTo{~ public class SiteInfoBean { =d
2 r6%v MfF~8 #$~ba%t9% private String sSiteURL; //Site's URL r'LVa6e"N private String sFilePath; //Saved File's Path '[|+aJ private String sFileName; //Saved File's Name gieN9S private int nSplitter; //Count of Splited Downloading File Z0!5d< L(S'6z~_9 z2gk[zY& public SiteInfoBean() Zv]x'3J#Y {//nSplitter的缺省值为5 <>xJn{f0c //default value of nSplitter is 5 -Lu)'+ this("","","",5); ^Jp&H\gI. } (;x3} ] <>eOC9;VY KT|RF public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) mpC`Yk { Ok5<TZ6t4k sSiteURL= sURL;
@4d)R sFilePath = sPath; i!2TH~zl sFileName = sName; oeSN9O this.nSplitter = nSpiltter; qL6c`(0 (GnuWc\p `J<*9dq% } XLk<*0tp 2I3h
MD0 \?>Hu
v public String getSSiteURL() @53k8 { 'X).y1' return sSiteURL; 0<"k8
k@J } <tpmUA[] Q'l^9Bz zepop19 public void setSSiteURL(String value) ?SQE5Z { |@?%Ct sSiteURL = value; !?f5>Bl } _EnwME{@ C$Lu]pIL* r0t^g9K0 public String getSFilePath() pA.J@,>`}
{ >4Y3]6N0.F return sFilePath; rD?L } 2n><RZ/9 =@Dwlze I4;A8I public void setSFilePath(String value) 3K&4i'}V { k 4/D8(OXw sFilePath = value; @WH@^u } ]$ afC!Z G CRz<)1 -U~ public String getSFileName() `.x$7!zLC { .Xm(D>>k return sFileName; ~AYN } sb:d>6 Y3kA?p0 dca;'$ public void setSFileName(String value) ]A
FI\$qB\ { ELrsx{p: sFileName = value; rn DCqv!'P } HCK|~k @uo ~nF j, Yw5' 6NU
public int getNSplitter() -yxOBq { ~pa!w?/bQ return nSplitter; IJTtqo } Qjx?ri// s?8<50s 9[!,c`pw public void setNSplitter(int nCount) u&G.4QQF { (>J4^``x= nSplitter = nCount; $VAx:Y| } jR=s#Xz } >56>*BHD x@mL $ f)]%.> /* AV 8n( **Utility.java _'4A|-9 */ NmK8<9`u package NetFox; wB'zuPAK6 6nhMP$h U$oduY# public class Utility { \
w3]5gJZ %B.D^]S1: nEzf.[+9/ public Utility() mw_Ew]& { *5bLe'^\|K Y_`- 9'& <Q|d&vDVfV } +q6ydb, '`'GK&) //线程睡眠 =b;>?dP public static void sleep(int nSecond) G!4(BGx& { zf3v5Hk try{ yH][(o=2 Thread.sleep(nSecond); AM=z`0so } kq\)MQ"/X catch(Exception e) .CP&bJP% { s
{^yj e.printStackTrace (); +_-bJo2a } :akT 'q# } I ZQHu h l
& Dxg //日志 t|t#vcB public static void log(String sMsg) kd"N29 { a^ ,(v System.err.println(sMsg); w[P4&?2: } f#ri'&}c
: 0"~i^ "~TA SX_? public static void log(int sMsg) ?` SUQm { XMG]Wf^%\< System.err.println(sMsg); \uss Uv } )M2F4[vcb } ;Eu3[[V 54zlnM$ q7u'_R,; /* UMX@7a,[3 **TestMethod.java (a9d/3M */ \.M*lqI package NetFox; TLehdZ>^ @cU&n6C@ 8enEA^ public class TestMethod { :[;hu}!& [w ;kkMJAy \h8 <cTQ public TestMethod() -G6U$ { ///xx/weblogic60b2_win.exe Ty88}V try{ Z`YJBcXR SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); e<r,&U$ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); qZ@s#UiB SiteFileFetch fileFetch = new SiteFileFetch(bean); w3jO6*_ M fileFetch.start(); vq34/c^ } =B.F;40 catch(Exception e){e.printStackTrace ();} j65<8svl I%urz!CNE* ^n0]dizB } :1Sl"?xU NHlk|Y#6b uslQ*7S[^ public static void main(String[] args) +}jJ&Z9) { XrZ*1V new TestMethod(); V)}rEX } v%Wx4v@%SE } ,AT[@ 点击下载更多相关资料
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