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/* :qw:)i **SiteFileFetch.java `\#Qr|GC */ 5E~][. d package NetFox; 6V!yfps) import java.io.*; CYG'W FvZZ import java.net.*; 0wxQ,PI1' 2{ }5WH $D8KEkW public class SiteFileFetch extends Thread { qAkx52v6 )W uuU [( h]G}E9\l SiteInfoBean siteInfoBean = null; //文件信息Bean -08Ys c long[] nStartPos; //开始位置 {}vW= long[] nEndPos; //结束位置 <9B43 FileSplitterFetch[] fileSplitterFetch; //子线程对象 dqPJ 2j $\ long nFileLength; //文件长度 @$Z5Ag! boolean bFirst = true; //是否第一次取文件 ^8E/I]- boolean bStop = false; //停止标志 _MnMT9 File tmpFile; //文件下载的临时信息 vPpbm DataOutputStream output; //输出到文件的输出流 3^wJ4=^ b-%7@j //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) |jO&qT]{ public SiteFileFetch(SiteInfoBean bean) throws IOException 1[:?oEI { ;r"YZs&Xd siteInfoBean = bean; 9ZeTS~i //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ^e8~eL+ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); d^!)',` if(tmpFile.exists ()) o!gl
:izb {
(/-2bO bFirst = false; <A; R%\V read_nPos(); {I&>`?7. } Z455g/=ye else \|L ~#{a { )k.;.7dXe nStartPos = new long[bean.getNSplitter()]; #9F=+[L nEndPos = new long[bean.getNSplitter()]; W}50E.\# } 5<0&y3 Pa'g=- #tRLvOR: U^-:qT;CX } 2,{m>fF +ng8!k /EZF5_`bT public void run() CE=&ZHt9 { y)0r%= //获得文件长度 b%IRIi&, //分割文件 Fo|6 PoSo //实例FileSplitterFetch }te\)
Yk.N //启动FileSplitterFetch线程 "t$c'` //等待子线程返回 k1e0kxn try{ &^=6W3RD if(bFirst) <5%x3e"7u { D(yU:^L nFileLength = getFileSize(); *e&OpVn if(nFileLength == -1) l}:&} { 5(W`{{AW System.err.println("File Length is not known!"); Rf||(KC< } TcPYDAa else if(nFileLength == -2) 4D=p#KZ { vq-Tq> System.err.println("File is not access!"); kTZ`RW&0 } P~HzNC else klmRU@D { e <2?O for(int i=0;i<nStartPos.length;i++) FR"yGx#$ { $$ma1.t" nStartPos = (long)(i*(nFileLength/nStartPos.length)); dtD)VNkBZ } FW~%xUSE5 for(int i=0;i<nEndPos.length-1;i++) z UN&L7D { XUTI0 nEndPos = nStartPos[i+1]; i P gewjx } `"`/_al^ nEndPos[nEndPos.length-1] = nFileLength; hfw$820y[ } Z.TYi~d/9D } lMoi5q lJ1_Zs ` `p0+j //启动子线程 GvQKFgO6h fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; }QrBN:a$( for(int i=0;i<nStartPos.length;i++) >1u!(-A { M+4>l\ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), H <7r siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), =pSuyM' nStartPos,nEndPos,i); r1dP9MT\8 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Jse;@K5y fileSplitterFetch.start(); i8 t% v } 8ExEhBX8 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), c4H5[LPF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 5~)m6]-6 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", cXP*?N4Cf nEndPos = " + nFileLength); 9HJrMX // fileSplitterFetch[nPos.length-1].start(); a^wGc+ bn$a7\X- D2<(V,h9 //等待子线程结束 j8gw]V/B: //int count = 0; YB?yi( "yL //是否结束while循环 "%^T~Z(_j boolean breakWhile = false; 'VVEd[ 2L?jp:$;X $646"1S while(!bStop) 5MU-Eu|*> { |KH9 81 write_nPos(); NHI(}Ea|] Utility.sleep(500); NmbA~i breakWhile = true; [3KP@'52k /4K ^- &?[uY5Mk for(int i=0;i<nStartPos.length;i++) uUy~$>V { <<#j?% if(!fileSplitterFetch.bDownOver) E(%_aFx>/ { J9buf}C[ breakWhile = false; f&5'1tG break; b#
v+_7 } OH+kN/Fd } A!xx#+M if(breakWhile) .eZsKc-@ break; }wY6^JF >s*ZT%TF St`3Z/|h //count++; R H^!7W* //if(count>4) XXwe/>J // siteStop(); p h5rS< } E![Ye@w aFfd!a"n ] x12_+ System.err.println("文件下载结束!"); ^*-6PV#Z } <r`^iR)% catch(Exception e){e.printStackTrace ();} o$4xinK } * |dz.Tr z&R
#j 4ju=5D]; //获得文件长度 B_ x?s public long getFileSize() N?Nu' { [v%j? int nFileLength = -1; m
N&G try{ ~R+,4 URL url = new URL(siteInfoBean.getSSiteURL());
dm:2:A8^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); CW+] Jv]" httpConnection.setRequestProperty("User-Agent","NetFox"); 7kT&}`g. !:^?GN #~x o1k
X` Eu int responseCode=httpConnection.getResponseCode(); C)z?-f if(responseCode>=400) mD"[z}r) { U)sw
Iis E processErrorCode(responseCode); [11D7L%1t return -2; //-2 represent access is error cxig <W } UgP g^mnYg5 r`OC5IoQ String sHeader; lK2=[%,~ iTu~Y<'m FPC^-mD for(int i=1;;i++) UzKB "Q { *~%QXNn` //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); tso\bxiU //Utility.log(in.readLine()); &`LR{7m sHeader=httpConnection.getHeaderFieldKey(i); 7W]0bJK+E if(sHeader!=null) K @h94Ni6 { 12TX_ 0 if(sHeader.equals("Content-Length")) W2T-TI,>PC { bQ`|G(g-d nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); AcQmY? break; Evy_I+l } F5s`AjU } h~r&7G@[} else $a.,;: break; LUfo@R } d cG)ql4d } fpA%:V catch(IOException e){e.printStackTrace ();} T$&vk#qr catch(Exception e){e.printStackTrace ();} ? \p,s-CR: u+Sj#iZ wN2D{Jj Utility.log(nFileLength); ypy ^o-)y"GJ -A(]U"@n return nFileLength; +]$c+!khj } ,1e\}^ ltg\x8w?c D0*+7n3 //保存下载信息(文件指针位置) ,: Z7P@
private void write_nPos() r3mmi5 { fI"OzIJV try{ S '(K output = new DataOutputStream(new FileOutputStream(tmpFile)); Rl[SqmnI)@ output.writeInt(nStartPos.length); X ApSKJ for(int i=0;i<nStartPos.length;i++) ]r@CmwC { 6|B;C // output.writeLong(nPos); =`/GBT$ output.writeLong(fileSplitterFetch.nStartPos); G"|c_qX output.writeLong(fileSplitterFetch.nEndPos); a?]~Sw"@ } y*vg9`$k output.close(); ~aL&,0 } _M)J{ {?: catch(IOException e){e.printStackTrace ();} >)8<d3m catch(Exception e){e.printStackTrace ();} ^2-+MWW. } z:W|GDD1 +BgUnu26 ' )~G2Ys //读取保存的下载信息(文件指针位置) yGE)EBH private void read_nPos() 5fuYva
>Ik { ~n{lu'SIX2 try{ |TRl>1rv DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); wak`Jte=}m int nCount = input.readInt(); Ur,{ZGm nStartPos = new long[nCount]; n|Gw?@CU7 nEndPos = new long[nCount]; Y=(%t:#_ for(int i=0;i<nStartPos.length;i++) miEf<<L#z { 'da$i nStartPos = input.readLong(); !I+F8p nEndPos = input.readLong(); l*]nvd_ } 3fq'<5 ^ input.close(); CW'<Nh } tvR|!N } catch(IOException e){e.printStackTrace ();} N51WY7 catch(Exception e){e.printStackTrace ();} m4 :"c" } =0_((eXwf CQI\/oaO /[=U$=uH private void processErrorCode(int nErrorCode) _GsHT\ { n~'cKy)m System.err.println("Error Code : " + nErrorCode); )(W%Hmi } 4$Ud4< ea6`%,lF~ }-%:!*bLj //停止文件下载 (F'?c1 public void siteStop() Mk|*=#e; { cW?~]E'< bStop = true; E#/vgm=W; for(int i=0;i<nStartPos.length;i++) 3O!TVSo fileSplitterFetch.splitterStop(); Ro oem dCM 2e @zd\ 1WMwTBHy+ } FI|@=l;_ } Q8r 7 //负责部分文件的抓取 o4g<[X) **FileSplitterFetch.java 9QryW\6.@z */ 3U73_=>=& package NetFox; m+/-SG 34P5[j!h C5jR|| import java.io.*; RU^lR8; import java.net.*; =2=n Kzd`|+?'`M 2o5v{W public class FileSplitterFetch extends Thread { StuDtY ,lly=OhKb 4f?Y'+>Z, String sURL; //File URL n/3gx4.g long nStartPos; //File Snippet Start Position De*Z UN|< long nEndPos; //File Snippet End Position boR&'yX int nThreadID; //Thread's ID 6:Nz=sw8 boolean bDownOver = false; //Downing is over }Rc8\, boolean bStop = false; //Stop identical ]'UO]i/ FileAccessI fileAccessI = null; //File Access interface U-#t&yjh# Sr`gQ#b@r} 6*,8 H& public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException aQEMCWxZ { %q@eCN this.sURL = sURL; ?wR;" this.nStartPos = nStart; d&p]O this.nEndPos = nEnd; EMe6Z!k nThreadID = id; rwlV\BU fileAccessI = new FileAccessI(sName,nStartPos);//定位 L/w9dk*uv } y/m^G=Q6g# q(Y<cJ?X t/bDDV" public void run() lq$1CI { _ID2yJ while(nStartPos < nEndPos && !bStop) *Bt`6u.>e, { WRJ+l_81 *a@pZI0' OjCT*qyU< try{ b\%=mN URL url = new URL(sURL); KZL5>E HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ?'K}bmdt}. httpConnection.setRequestProperty("User-Agent","NetFox"); 'r%`(Z{~ String sProperty = "bytes="+nStartPos+"-"; PiZt?r?5w| httpConnection.setRequestProperty("RANGE",sProperty); Lrr^obc Utility.log(sProperty); :XMw="u= *_$%Tv.] p1HU2APFP InputStream input = httpConnection.getInputStream(); vL13~q*F //logResponseHead(httpConnection); 9jiZtwRpk GG\]}UjX -pj&|<
h+9 byte[] b = new byte[1024]; 2C %{A int nRead; I<.3"F1} while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) +7o3TA]- { bG>pm|/ nStartPos += fileAccessI.write(b,0,nRead); HB\y [:E //if(nThreadID == 1) ASAz<H$ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9c806>]U^ } o:#MP(h,N FpfOxF6A3 9p(s FQ
[ Utility.log("Thread " + nThreadID + " is over!"); q+t*3;X. bDownOver = true; K2L+tw //nPos = fileAccessI.write (b,0,nRead); QQ97BP7W } F5.Vhg catch(Exception e){e.printStackTrace ();} !O)Ruwy } d>NElug } Og%qv
Bj 6 %Md;=,a:6 1bd(JL //打印回应的头信息 @6ZQkX/ public void logResponseHead(HttpURLConnection con) c3!d4mC: { Hbx=vLQ6 for(int i=1;;i++) 9wC q { bR49(K$~ String header=con.getHeaderFieldKey(i); A;w,m{9< if(header!=null) >t?;*K\x" //responseHeaders.put(header,httpConnection.getHeaderField(header)); tp_*U, Utility.log(header+" : "+con.getHeaderField(header)); uFb&WIo1 else Az6f I*yP break; Q9X_aB0 } `>'E4z]-_ } qJVW :$1q +D`IcR-x #
o)a`,f public void splitterStop() e0+N1kY { k%/Z.4vQG bStop = true; +Ld4e] } ed2QGTgR D^I%tn=F Wze\z
} yFshV\ JpD<2Mz_|V RXb+"/ /* 3F[z]B **FileAccess.java U8?QyG
2A *//文件访问(定位,写) 5)2lZ(5.A# package NetFox; |9jeOV}/ import java.io.*; 4rc4}Yu,JI y!."FoQ K]oFV public class FileAccessI implements Serializable{ BE:HO^-.1 /^i7^ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 C\j|+s RandomAccessFile oSavedFile; My76]\Psh long nPos; g03I<<|@ M8ZpNa 't{~#0d= public FileAccessI() throws IOException vkOCyi?c { 6OF&Q`*4 this("",0); s6lo11 } B5~S&HQ?B6 ,H2[["1DH 9sFZs]uM public FileAccessI(String sName,long nPos) throws IOException ow!utAF { H? Z5ex oSavedFile = new RandomAccessFile(sName,"rw"); '0[D-jEr this.nPos = nPos; ;x$,x- oSavedFile.seek(nPos); f6j;Y<}' g } (Gp/^[.%& B?`Gs^Y{z s%2 w&Us* public synchronized int write(byte[] b,int nStart,int nLen) uK6R+a { a"EX<6" int n = -1; 3'}(:X( try{ 2%'{f oSavedFile.write(b,nStart,nLen); / Of*II& n = nLen; 3vfm$sx@ } ?{NP3
catch(IOException e) R?b3G4~ { >\y|}|? e.printStackTrace (); pwtB{6)VH{ }
s!X@ l brx
7hI )y4bb^;z return n; dlmF?N|EC } fb3(9 }:<`L\8q\ *pK bMG# } Q1yMI8 8[\F*H }^U7NZn<" /* ebK/cPa8 **SiteInfoBean.java s!(O7Ub */ F7P?*!dx package NetFox; ?~X*\ r6S-G{o %Hx8%G! public class SiteInfoBean { &YC Z
L %Xc50n2Z -< D7 private String sSiteURL; //Site's URL FcVQ_6 private String sFilePath; //Saved File's Path A#;6~f private String sFileName; //Saved File's Name 2[!#Xf private int nSplitter; //Count of Splited Downloading File U4)x "s[CP $/*19e~ }MQNzaXY^ public SiteInfoBean() ^/@Z4(E {//nSplitter的缺省值为5 p+M#hF5o //default value of nSplitter is 5 Q+@/.qJ this("","","",5); r9MS,KG8 } Q^13KWvuV &!i'Q;q sNB*S{ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) _G3L+St { Q1f)uwh sSiteURL= sURL; K^32nQX sFilePath = sPath; s/Ne,v sFileName = sName; QguRU|y this.nSplitter = nSpiltter; )/4eT\ = 03N|@Tu ?{=&R o } RJ}%pA4I hA=.${uIO M2Q*#U>6r public String getSSiteURL() eBT+| { .X1xpi% return sSiteURL; ohEIr2 } ,4W~CkLD r?9D/|` EBQ,Ypv public void setSSiteURL(String value) n[[2<s*YJ { 9}-;OJe sSiteURL = value; Sb QM!Q } >o/+z18x r+%$0eB1^ wWYo\WH' public String getSFilePath() r..&6-%:N { P~}Yj@2 return sFilePath; fEJF3<UF& } E;1QD/E$ pNFVa<D .@KI,_X6, public void setSFilePath(String value) R6m6bsZ` { (e"\%p` sFilePath = value; "J(T?|t } 8*x/NaH
/\ to9X2^ tUGnp'r public String getSFileName() D[p_uDIz { -3GlpC22 return sFileName; qV{iUtYt } +b
sc3 MV.&GUez{ 2#81oz&K public void setSFileName(String value) 0_&5S`tj {
A)9F_;BY sFileName = value; >PS`;S!( } 'w"hG$". jp+s[rRc\{ gmUX
2x( public int getNSplitter() 'ZFbyt Q2
{ P.
Kfoos return nSplitter; /{R>o0oW } k0bDEz.X GMKY1{ 2{|mL`$04< public void setNSplitter(int nCount) 8}{W.np_ { C]NL9Gq` nSplitter = nCount; a$]i8AeG } []hC* } 4(TR'_X( TgvBy 4 {rj 4P? /* ^'Qe.DW[ **Utility.java XG01g3 */ !EB[Lutm package NetFox; d< b ,]. L(DDyA{bA MT{ovDA]. public class Utility { hv#|dI=kZR rixt_}aE ;CLOZ{ public Utility() <L+y
6B { OtZc;c ><H*T{
Pg Q8^g WBc } DgODTxiX Yqb3g(0 //线程睡眠 Qgxpq{y public static void sleep(int nSecond) `w EAU7m: { cc{^0JT try{ G1G*TSf Thread.sleep(nSecond); Xsd+5="{N } 1)hO!% catch(Exception e) N^%7 { kn&>4/') e.printStackTrace (); lB*HLC } DLd1Cl:"~: } Xhp={p; IM=3n%6 //日志 &%r<_1 public static void log(String sMsg) "g:1br?X,9 {
>8.o System.err.println(sMsg); LGq
T$ O| } Z~v-@ s5J?,xu 1fqJtP6 public static void log(int sMsg) &*#Obv {
IIO-Jr System.err.println(sMsg); odhcU5 } #D-Ttla } F}c}I8Ao /&+*X)#v :N64FR# /* vJ{aBx`VS **TestMethod.java SaFNPnk= */ >>%E?'9A package NetFox; OCEhwB0 GD0Q`gWNe Cq[<CPAS public class TestMethod { Zmz $
hr _&e$?hY cf,^7,-`" public TestMethod() Iad&Z8E { ///xx/weblogic60b2_win.exe _B7+n"t\r try{ 7mA:~- .u SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); odKdpa
Zc[ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); =[LUOOR*] SiteFileFetch fileFetch = new SiteFileFetch(bean); S!h=HE fileFetch.start(); <+_WMSf;4 } J*4T|#0 catch(Exception e){e.printStackTrace ();} e[Jh7r>' 22@w: Ud)2Mq1#M } g17 fge6% (?1/\r ',]^Qu`a public static void main(String[] args) [F+*e=wjN> { GDYFhH7H new TestMethod(); +}iuTqu5 } &] O^d4/ } v]y=+* A 点击下载更多相关资料
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