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/* )3G?5
OTS **SiteFileFetch.java Q| xPm: */ YO,GZD`-o package NetFox; pkk0?$l", import java.io.*; niA{L:4 import java.net.*; 7s.sbP~ gl!3pTC VFYJXR{ public class SiteFileFetch extends Thread { GbL,k?ey 8=2)I. D~mGv1t"
SiteInfoBean siteInfoBean = null; //文件信息Bean 4cV(Z-\ long[] nStartPos; //开始位置 *S=v1 s/ long[] nEndPos; //结束位置 }'@*Ol j FileSplitterFetch[] fileSplitterFetch; //子线程对象 DD~8:\QD long nFileLength; //文件长度 el[6E0!@ boolean bFirst = true; //是否第一次取文件 w\@Anwj#L boolean bStop = false; //停止标志 ^3r2Q?d\ File tmpFile; //文件下载的临时信息 z ,ledTl DataOutputStream output; //输出到文件的输出流 a(J~:wgd oa9T3gQ? //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) \7/xb{z| public SiteFileFetch(SiteInfoBean bean) throws IOException DAvAozM { .d8~]@U!< siteInfoBean = bean; PMTyiwlm //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); UhEnW8^bz1 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); wEkW= if(tmpFile.exists ()) W0nRUAo[ { BRW
bFirst = false; QTLOP~^ read_nPos(); = j}00,WH } Ur@'X- else FD`V39## { IzL
yn nStartPos = new long[bean.getNSplitter()]; TnKe"TA|9 nEndPos = new long[bean.getNSplitter()]; Z#Zk) } zCco/]h
Zd~Z`B} & 9xWeVlfQ 1$
l3-x } `Y(/G"] ChBZGuO: XS1>ti|< public void run() /sYD+*a { a2g1 5;kM //获得文件长度 +q=/}| //分割文件 F5*Xx g}N //实例FileSplitterFetch Rq\.RR]( //启动FileSplitterFetch线程 )fC^h=Qp //等待子线程返回 f-23.]`v try{ 4~Z\tP|Q. if(bFirst) QGYmQ9m{kL { Wm"W@LPx5 nFileLength = getFileSize(); Z-/ E$j if(nFileLength == -1) 43(+3$V M7 { N}^\$sVu_ System.err.println("File Length is not known!"); G,$jU9 f } C"YM"9JSJ else if(nFileLength == -2) .IG(Y!cB { mk0rAN System.err.println("File is not access!"); e<IT2tv>u } jt;,7Ek else /O&j1g@ { gN(8T_r for(int i=0;i<nStartPos.length;i++) \6sp"KqP { eR;cl$ nStartPos = (long)(i*(nFileLength/nStartPos.length)); RE*SdazY? } #^eviF8 for(int i=0;i<nEndPos.length-1;i++) Dpof~o,f { T"dEa-O nEndPos = nStartPos[i+1]; ^Ji5)c } ,c7 8O8| nEndPos[nEndPos.length-1] = nFileLength; rt."P20T } Z!ub`coV[ } & }}o9 ,H.q%!{h_ q5QYp //启动子线程 e&wWlB![ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; v_oNM5w for(int i=0;i<nStartPos.length;i++) #Ok*Or { *xt3mv/<z fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), OHH wcJ 7N siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), -,p(PK nStartPos,nEndPos,i); \]o#tYN\a0 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yyBy|7QgO fileSplitterFetch.start(); :;]6\/ky } QZzi4[-as // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), N|8TE7- F| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); O[q {y // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", +e4o~p nEndPos = " + nFileLength); 7zy6`OP // fileSplitterFetch[nPos.length-1].start(); bl:.D~@ jYuH
zf &grT} //等待子线程结束 -4"E]f //int count = 0; Oi=kL{DG:s //是否结束while循环 VBsS1!g boolean breakWhile = false; O~ w&4F;{ Rsqb<+7 ULAAY$o@5 while(!bStop) 7X1T9'jI2 { Xgc@cwd write_nPos(); qifX7AXHr Utility.sleep(500); -Vw,9VCF breakWhile = true; ,GGr@}) ?!8M
I,c/ r1xNU0A for(int i=0;i<nStartPos.length;i++) V[Auw3) { NtSa#$A if(!fileSplitterFetch.bDownOver) #(!> { lcyan breakWhile = false; vMDV%E S1t break; <+pwGKtD } l *.#g } gHA"O@HgDI if(breakWhile) >STWt>s break; @)|62Dv / |%we@
E r#3(;N{= //count++; = K}5 fe //if(count>4) IIs'm!"Y> // siteStop(); WHMt$W}% } KK}^E_v i5q
VQo wjQu3 ,Cj System.err.println("文件下载结束!"); hH|3s-o } j:\MrYt0H catch(Exception e){e.printStackTrace ();} i\2~yXw\ } Z6A*9m "\)j=MI8u+ &8z`]mB{t //获得文件长度 n<uF9N< public long getFileSize() 4tof[n3us { z45ImItH int nFileLength = -1; $9j\sZj& try{ ; Sq_DP1W URL url = new URL(siteInfoBean.getSSiteURL()); &}Cm9V HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (n|PLi httpConnection.setRequestProperty("User-Agent","NetFox"); (%YFcE)SRS seB ^o} a9` E&Q}z int responseCode=httpConnection.getResponseCode(); v&D^N9hy9 if(responseCode>=400) tc.R(F96 { 5ZSV)$t processErrorCode(responseCode); u-$(TyDEl| return -2; //-2 represent access is error vzd1:'^t } $&I##od S{zi8Oc6 :4;ZO~eq! String sHeader; Cpz'6F^oP D({%FQ" }v"X.fa^ for(int i=1;;i++) OV_Y`u7YR { C%9;~S //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); "FwbhD0Gb //Utility.log(in.readLine()); JUt
7 sHeader=httpConnection.getHeaderFieldKey(i); |^[]Oy= if(sHeader!=null) 2I*
7?` { Q
&<:W4N* if(sHeader.equals("Content-Length")) O=?WI
{ J 6D?$ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); D4$;jz,, break; ?<STt 9 } 4#1[i|:M } -1;BwlL else !X[b 4p break; 6*J`2U9Q } 3pl/kT.\ } !ZJ"lm catch(IOException e){e.printStackTrace ();} B\G?dmo catch(Exception e){e.printStackTrace ();} }_vE
lBh6$ BxS\"W vd6Y'Zk|F6 Utility.log(nFileLength);
0GK<l <Wn={1Ts" 7F!_gj p return nFileLength; xT6&;,|` }
yl0&|Ub y-w=4_W ,]+P#eXgE //保存下载信息(文件指针位置) nlOM4fJ( private void write_nPos() 1JMEniB+9 { p%pM3<p try{ 8D@H4O. output = new DataOutputStream(new FileOutputStream(tmpFile)); }RowAGWL output.writeInt(nStartPos.length); Soy!)c] for(int i=0;i<nStartPos.length;i++) }OZp[V { 9~2}hXm; // output.writeLong(nPos); aVNBF` output.writeLong(fileSplitterFetch.nStartPos); DK;p6_tT output.writeLong(fileSplitterFetch.nEndPos); {4SwCN / } $6e&sDJ output.close(); tpOMKh.` } h,o/(GNnW catch(IOException e){e.printStackTrace ();} +[Cdd{2 catch(Exception e){e.printStackTrace ();} PeT _Ty } WDQtj$e+ e=ZwhRP QWz5iM //读取保存的下载信息(文件指针位置) 3NAU|//J private void read_nPos() K(@QKRZ7[ { ]wFKXZeK try{ 41Bp^R}^/ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); hqrI%% int nCount = input.readInt(); "h?;)Ye nStartPos = new long[nCount]; #2l6'gWE0 nEndPos = new long[nCount]; &9X`tCnL for(int i=0;i<nStartPos.length;i++) _yk}
[x0> { |TM&:4D]^ nStartPos = input.readLong(); hp=TWt~ nEndPos = input.readLong(); b Lag&c) } 9DcUx- input.close(); f0H
5 )DJf } jm9J-%? catch(IOException e){e.printStackTrace ();} WvSh i= catch(Exception e){e.printStackTrace ();} W _j`'WN/ } 2ED^uc:
0S {];4 JA0$Fz private void processErrorCode(int nErrorCode) 0s )B~ { EXn$ [K; System.err.println("Error Code : " + nErrorCode); ~3-2Iu^F } E/ %S0 0w^\sf%s zWvG];fsN //停止文件下载 CY2DxP % public void siteStop() 'A@[a_ { s!S,;H bStop = true; F%QZe*m[ for(int i=0;i<nStartPos.length;i++) clfi)-^{K fileSplitterFetch.splitterStop(); d.y2`wT &X0/7)*"v Cr0
\7 } JmN,:bI } Vlb L
p; //负责部分文件的抓取 pl62mp! **FileSplitterFetch.java <Q\`2{ */ S,AZrgh,"X package NetFox; O,qR$#l
ABhza| xx;'WL,g import java.io.*; !nVX .m9 import java.net.*; z('93vsO R$,`}@VqZ3 k`)LO`)) public class FileSplitterFetch extends Thread { LDV{#5J [$[t.m ~R)w
9uq String sURL; //File URL EUuMSDp long nStartPos; //File Snippet Start Position Zz?+,-$_*& long nEndPos; //File Snippet End Position ?2EzNN cS int nThreadID; //Thread's ID ~ezCE4^& boolean bDownOver = false; //Downing is over 9U}EVpD boolean bStop = false; //Stop identical 7C2/^x P FileAccessI fileAccessI = null; //File Access interface }T,E$vsx 73}k[e7e t1C{ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException
L$jyeFB5 { \
vJ*3H6 this.sURL = sURL; G#@<bg3 this.nStartPos = nStart; g1zqh, this.nEndPos = nEnd; :L`z~/6 nThreadID = id; (OG@]|- fileAccessI = new FileAccessI(sName,nStartPos);//定位 svo^#V~h' } Q ;k_q3 APc@1="#J ;4qalxzu public void run() Q ^ 39Wk@ { :He:Bdk while(nStartPos < nEndPos && !bStop) 9(X
*[X# { .{ x5(bi0S !h4 So4p ;=^WIC+Nr try{ =u;q98r URL url = new URL(sURL); ;F0A\5I HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); i-ogeR? httpConnection.setRequestProperty("User-Agent","NetFox"); / TJTu_# String sProperty = "bytes="+nStartPos+"-"; W\KZFrV@ httpConnection.setRequestProperty("RANGE",sProperty); @~N#)L^ Utility.log(sProperty); R>0ta
Q QM _~w\ rW6w1 InputStream input = httpConnection.getInputStream(); iTK1I0 //logResponseHead(httpConnection); g)p[A 4 D3HB`{ Hd2_Cg FB byte[] b = new byte[1024]; G:&Q)_ int nRead; ;zJ_apZ:{ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ix/uV)]k` { eBN>|mE4N nStartPos += fileAccessI.write(b,0,nRead); &WRoNc //if(nThreadID == 1) vcSS+ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )eG&"3kFe! } 2'}2r ~6 oz0-'_
6/n;u{| Utility.log("Thread " + nThreadID + " is over!"); 1%:A9%O)t bDownOver = true; 4C[gW //nPos = fileAccessI.write (b,0,nRead); i)p__Is } D2mB4 catch(Exception e){e.printStackTrace ();} =1JRu[&]8 } Bh.'%[', } c~C W-%wN ]f c:CR }9kq? //打印回应的头信息 JU6np 4 public void logResponseHead(HttpURLConnection con) . =5Jpo { e8# 3Y+Tc for(int i=1;;i++) sg y { &ar}6eO String header=con.getHeaderFieldKey(i); K_xOY
* if(header!=null) ]aR4U` //responseHeaders.put(header,httpConnection.getHeaderField(header)); sDC RL%0QK Utility.log(header+" : "+con.getHeaderField(header)); :Ry24X else }:irjeI, break; b(VU{cf2d } &Y>u2OZ } vqHJc2yYkZ vOS0E^ O
o:jP6r public void splitterStop() E6gEP0b { n\YxRs7
hF bStop = true; bi[l , } *X #e {|%O)fr, ]4yvTP3[Rm } (D{}1sZBQ 5HN<*u%z 85
hYYB0v /* 7y\g~?5N **FileAccess.java 8iN As#s *//文件访问(定位,写) "=(;l3-o package NetFox; 57>ne)51 import java.io.*; [
lW
" M %},gE[N!J g@k9w{_ public class FileAccessI implements Serializable{ lo: ~~l c5R{Sl //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 yh:,[<q RandomAccessFile oSavedFile; Z]f2& long nPos; A&F4;>dms Y
zS*p~| q#`^EqtUF public FileAccessI() throws IOException <T[N.mB { O| ]Ped9 this("",0); W6T&hB } Ol[gck|~ o}A #- ea0tx3' public FileAccessI(String sName,long nPos) throws IOException zIFL?8!H9{ { N -]PK%* oSavedFile = new RandomAccessFile(sName,"rw"); .}N^AO= this.nPos = nPos; ;vdgF oSavedFile.seek(nPos); sCQup^\ } oNZW#<K [{F7Pc !@{[I:5 public synchronized int write(byte[] b,int nStart,int nLen) SZ{cno1` { H>f{3S-% int n = -1; )yW_O: try{ hhAC@EGG oSavedFile.write(b,nStart,nLen); 2H[aY%1T n = nLen; "}p?pF<'0 } )c/y07er catch(IOException e) +3>/,w(x { ~iZF~PQ1_ e.printStackTrace (); acY[?L_6J } p0y?GNQ :QV6z*#zD [9om"' return n; ,jsx]U/^ } 7 afA'.= ' u};z:t g/Jj]X#r } YwWTv w s>Iyw.u [KI`e /* hX| UE **SiteInfoBean.java h)
PB */ w9<FX>@ package NetFox; 3dDQz# B4Af RK:sQWG public class SiteInfoBean { 8sF0]J[g{ ku9FN 7TPLVa=hO private String sSiteURL; //Site's URL R
4QwWSBJ private String sFilePath; //Saved File's Path Po!JgcJ#\ private String sFileName; //Saved File's Name ,
gr&s+ private int nSplitter; //Count of Splited Downloading File mRnzP[7-\) F"f}vl %802H%+ public SiteInfoBean() h9w^7MbO {//nSplitter的缺省值为5 1\J1yOL //default value of nSplitter is 5 ~uZLe\>K this("","","",5); ~K#_'Ldrd } x*"pDI0k) NT9- j#V -5,y
1_M public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) l)PFzIz=V { VBsFT2XiL sSiteURL= sURL; (9 z.IH7}k sFilePath = sPath; HD8"=7zJk sFileName = sName; '"fU2M<. this.nSplitter = nSpiltter; \
[^)
WQ 9k+&fyy Iam-'S5 } z'}= A tqwk?[y}+l [FV=@NI public String getSSiteURL() <
J<;?%] { c>WpO Z, return sSiteURL; ~iR!3+yg4 } qqt.nrQ^ W/ZahPPq -2jBs-z public void setSSiteURL(String value) ;'Vipj { q~'
K9 sSiteURL = value; u388Wj
} QOh w hzuMTKH9 >upXt? public String getSFilePath() N4` 9TN7 { $6&GAJe return sFilePath;
G_, t\ } mp+\! ",aT<lw. 8T.5Mhx0jS public void setSFilePath(String value) x+*L5$;h { &DbGyV8d"| sFilePath = value; <GT>s } 5nxS+`Pn.) r@ T-Hi DvRA2(M public String getSFileName() Nvx)H(8F { DtJTnvG~B return sFileName; %M;_(jda } Z*vpQBbu 9?l?G GmQ O2'bNR public void setSFileName(String value) Q&.IlVB[ { =@1R ozt sFileName = value; 9OQ0Yc!3 } .XLV:6 u.pKK
S4{ Mu(^xT public int getNSplitter() '!yS72{$2 { n$OE~YwP{ return nSplitter; Kixr6\ } "3Xv%U9@ )ZgER[ C$'D]fX public void setNSplitter(int nCount) a$xeiy9 { MKVfy:g%So nSplitter = nCount; [ n0##/ } dxkRk#mf: } q2S!m6 ! 6HEqm>Yau m<FWv2)^ /* j*eUF-J1 **Utility.java ?2?S[\@`0U */ &sZ9$s:(^ package NetFox; x!"SD3r=4> ]< s\V-y =.qm8+ public class Utility { cD'HQ3+ LL= Z$U
$ J8u{K.(*7 public Utility() `?zg3GD_ { Z{,GZT E'e8&3!bx fr}1_0DDz } PJxak3 VxkCK02k //线程睡眠 ZR;8rZ]( public static void sleep(int nSecond) M#\ < { C%}]"0Q1 try{ &dhcKO<4 Thread.sleep(nSecond); %Ycx C0S[ } 3d*&': catch(Exception e) |
((1V^ { T~i%j@Q.6 e.printStackTrace (); 74@lo-/LY } &v5G92 } r/NSD$-n [x2JFS#4 //日志 ^CZCZ,v public static void log(String sMsg) d5@X#3Hd { ADv^eJJ| System.err.println(sMsg); DS#cm3 } K3vseor v229H< _ztZ>' public static void log(int sMsg) ,op]-CY5 { g>2aIun_Q System.err.println(sMsg);
0dgP } b]!9eV$ } G(U 9rJ9 lLb:f6N @s_3 0+ /* Ds%9cp*6 **TestMethod.java Tub1Sv>J */ "w}-?:# j package NetFox; f4]N0 403[oOj YBb)/ZghY public class TestMethod { #O2wyG)oU vU=9ydAj? "$XYIuT public TestMethod() 2v0!` &?M{ { ///xx/weblogic60b2_win.exe ~I{EE[F>qL try{ 9T(L"9r-e SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); XDPL;(? //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); `I5O4|K) SiteFileFetch fileFetch = new SiteFileFetch(bean); Tbv/wJ fileFetch.start(); ShQ|{P9 } '
|&>/dyq catch(Exception e){e.printStackTrace ();} "-w^D!C rRB~=J" \HAJ\9*w) } sX+`wc T4mv%zzS q@(1Yivk public static void main(String[] args) q[7CPE0n { 9<yAQ?7L new TestMethod(); 0,HqE='w } RFw(]o,9cR } Z&_y0W=t 点击下载更多相关资料
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