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/* ouKID_' **SiteFileFetch.java Z~o*$tF/ */ !Y_"q^5GG' package NetFox; FKflN import java.io.*; "H>L!v import java.net.*; ;J pdnV UD[S>{
mg)lr&-b public class SiteFileFetch extends Thread { 1E!0N`E -}k'a{sj= {O*<1v9< SiteInfoBean siteInfoBean = null; //文件信息Bean O4FW/)gq long[] nStartPos; //开始位置 '>>
IMF long[] nEndPos; //结束位置 ~*D)L'`2M FileSplitterFetch[] fileSplitterFetch; //子线程对象 ?}sh@;]*h long nFileLength; //文件长度 yG58?5\9 boolean bFirst = true; //是否第一次取文件 #5O'XH5_ boolean bStop = false; //停止标志 V%&t'H{ File tmpFile; //文件下载的临时信息 DG1
>T DataOutputStream output; //输出到文件的输出流 Xg.'<.!g0 /E(H`;DG //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 2XrPgq' public SiteFileFetch(SiteInfoBean bean) throws IOException "Iu[)O% { $DC*&hqpt siteInfoBean = bean; &9\z!r6mc //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); "/hM& tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); x Yr-,$/ if(tmpFile.exists ()) {e[S?1t=l { l(9$s4R bFirst = false; cH6ie?KvAo read_nPos(); f&t]O$ } 9BB<.
p else hi,! { -i|qk`Y nStartPos = new long[bean.getNSplitter()]; >%+"-bY nEndPos = new long[bean.getNSplitter()]; ]aq!@rDX } wJh|$Vn sd\>|N?' 9"2.2li5$ ~u1ox_v`%( } V
?3>hQtB a_I!2w<I a8aEZ724 public void run() qVC_K/w
7 { &V1N
a1` //获得文件长度 S{j|("W"[ //分割文件 H V<|eL # //实例FileSplitterFetch tA$,4B? //启动FileSplitterFetch线程 I.tJ4 //等待子线程返回 BQ[1,\> try{ ` =dD6r if(bFirst) {
yU1db^ { .Ozfj@ f nFileLength = getFileSize(); gs 8w/ if(nFileLength == -1) rq9{m( { /ee:GjUkB System.err.println("File Length is not known!"); >ZkcL7t9 } !zL1XW)q else if(nFileLength == -2) bv0B { *x[B g]/ System.err.println("File is not access!"); ([UuO}m- } AL! ^1hCF else c&)H { Jl&bWp^3 for(int i=0;i<nStartPos.length;i++) j11 \t { aGNVqS%y nStartPos = (long)(i*(nFileLength/nStartPos.length)); ( gO ?-0 } _~_04p for(int i=0;i<nEndPos.length-1;i++) NKLGbH { SqFya nEndPos = nStartPos[i+1]; ];6c/#2x } rwFR5 nEndPos[nEndPos.length-1] = nFileLength;
wRb%-s } 7CUu:6% } _)2.#L zc]F j>eL&.d //启动子线程 _`/0/69 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; wQ!~c2a<8 for(int i=0;i<nStartPos.length;i++) p+;Re2Uyg { |K'{R'A fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %cO;{og M siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), m(nlu nStartPos,nEndPos,i); x@2rfs Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?1 r@r fileSplitterFetch.start(); 7GfgW02 }
wxsJB2 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), twt
Bt L siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); lf0/0KH // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Vv'
e,m nEndPos = " + nFileLength); MTb}um.($ // fileSplitterFetch[nPos.length-1].start(); PTA;a0A n)} J< 8Nxf2i5 //等待子线程结束 q?8MKf[N //int count = 0; V|}9d:&O //是否结束while循环 /`hr) boolean breakWhile = false; p]`pUw{ 84b;G4K 3{Ze>yFE while(!bStop) ,.]e~O4R { C-qsyJgZy write_nPos(); !W^2?pqN Utility.sleep(500); _4o2AS : j breakWhile = true; kR^7Z7+#* Y@KZ:0< 8 jqt=}b for(int i=0;i<nStartPos.length;i++) pW:h\}%`n { jCW>=1:JGY if(!fileSplitterFetch.bDownOver) I.R3?+tZ
{ 10}oaL S breakWhile = false; =G}_PRn break; rZu_"bcJ } x~ s> } H; TmG<S if(breakWhile) 2-llT break; Ms1G&NYP eN/sW!:P| eno*JK //count++; {,IWjt &> //if(count>4) ?MKf=!w // siteStop(); X$/3 } \q3H#1A +n,8o:fU: ~Zl`Ap System.err.println("文件下载结束!"); r4+w?=` } qqw6p j catch(Exception e){e.printStackTrace ();} /T#<g: } x)"=*Jj 6i.'S5. 6$ IXER //获得文件长度 C$*`c6R public long getFileSize() [7<X&Q { zmr=iK int nFileLength = -1; wrqdQ}@( try{ &@dMk4BH< URL url = new URL(siteInfoBean.getSSiteURL()); ~pzaX8! HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); YL){o$-N"J httpConnection.setRequestProperty("User-Agent","NetFox"); FVY,CeA. WcH^bAY 6 H7Y}qP5X int responseCode=httpConnection.getResponseCode(); C| Mh<,~E if(responseCode>=400) 6sP;O,UX { ~|DF-t
V processErrorCode(responseCode); JTx}{kVO return -2; //-2 represent access is error fEVuH] } 0p2 0Rt QMtt:f]?i yqejd_cd String sHeader; 'Dat.@j =7e8N&-nv ^]U2Jd for(int i=1;;i++) H5&>Eny { "3\RJ?eW:S //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); /2FX"I[0V% //Utility.log(in.readLine()); am%qlN< sHeader=httpConnection.getHeaderFieldKey(i); 44%H? ,d if(sHeader!=null) 1/cb;:h> { @lTUag'U0 if(sHeader.equals("Content-Length")) 1'aS2vB9 { xR_]^Get nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); .z[+sy_ break; T{)!>) } +B8Ut{l } e\yj>tQJg else UD9h5PgT break; s|,]Nb=z/ } ZM|>Va/X } ]ei])
JI catch(IOException e){e.printStackTrace ();} G x,D'H' catch(Exception e){e.printStackTrace ();} cU{LyZp +Og O<P 20fCWVw}?} Utility.log(nFileLength); {;p/V\ 8ZIv:nO$ (XW#,=rYk return nFileLength; Ys<wWfW } QlXy9-oJ" I[4E? (vI7qD_ //保存下载信息(文件指针位置) I*
bjE' private void write_nPos() wR;l"*j { N$y4>g try{ EXBfzK)a output = new DataOutputStream(new FileOutputStream(tmpFile)); vaQ,l6z
.h output.writeInt(nStartPos.length); wZC'BLD for(int i=0;i<nStartPos.length;i++) ~f@<] { BMdr.0 // output.writeLong(nPos); AoR`/tr, output.writeLong(fileSplitterFetch.nStartPos); &a|oJ'clz output.writeLong(fileSplitterFetch.nEndPos); TM"-X\e~{ } ^-ACtA) output.close(); iF%q6R } [=9R5.)c catch(IOException e){e.printStackTrace ();} .Z^g
7 *s catch(Exception e){e.printStackTrace ();} B}M J?uvA } %]R#}amW `Ch6"=t H!Od.$ZIX //读取保存的下载信息(文件指针位置) 8odVdivh private void read_nPos() xO.7cSqgw { $(NfHIX try{ ~Fx[YPO, DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); q6ikJ8E8b int nCount = input.readInt(); ;T_9;RU<'b nStartPos = new long[nCount]; Kz<xu ulr nEndPos = new long[nCount]; )F~_KD)7jJ for(int i=0;i<nStartPos.length;i++) [%@zH { RhJ<<T.2 nStartPos = input.readLong(); D3K`b4YV nEndPos = input.readLong(); 6
%=BYDF } JxvwquI input.close(); =3T?U_u@ }
1y@- catch(IOException e){e.printStackTrace ();} H,I}R catch(Exception e){e.printStackTrace ();} :D,YR(]) } ew"Fr1UGYZ 7&QVw(:)M oby*.61?5l private void processErrorCode(int nErrorCode) ;?[~]" { E??%)q System.err.println("Error Code : " + nErrorCode); C=]3NB>Jc } =;`YtOL #<~f~{x J{Ay( //停止文件下载 Cn55%: public void siteStop() [x)e6p) { yjr@v!o bStop = true; l6WcnJ for(int i=0;i<nStartPos.length;i++) G!~BA* fileSplitterFetch.splitterStop(); BmM,vllO 7^iAc6QSy3 x L BG}C } q)~qd$yMS } 6+FON$8 //负责部分文件的抓取 #.><A8J **FileSplitterFetch.java 9?:S:Sq */ nx4aGS"F: package NetFox; \fhT#/0N
,YY#ed&l '-vyQ^ import java.io.*; Z~uKT n import java.net.*; br;G5^j3? ]M2<I#hF. ./
:86@O public class FileSplitterFetch extends Thread { KRtu@;? i#lo?\PO> ypd?mw&1} String sURL; //File URL X2`>@GR/> long nStartPos; //File Snippet Start Position g@2.A;N0 long nEndPos; //File Snippet End Position Z]Y4NO; int nThreadID; //Thread's ID `#f=&S?k boolean bDownOver = false; //Downing is over caP boolean bStop = false; //Stop identical |z'?3?,~ FileAccessI fileAccessI = null; //File Access interface .#@D n( m\f_u* (2li:1j public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException nADd,|xD3 { Wa(S20yF this.sURL = sURL; /RM-+D:Y this.nStartPos = nStart; =#tQIhX` this.nEndPos = nEnd; DS C4 nThreadID = id; ]Yg EnZ fileAccessI = new FileAccessI(sName,nStartPos);//定位 5avO48;Vc }
u\xm8}A `$H M@ kZ(Rkv public void run() qJA.+q.e$e { HWhKX:`l while(nStartPos < nEndPos && !bStop) a,~P_B|@ { m'tk#C 50&F#v%YB +][P*/ Ek try{ $at|1+bQ URL url = new URL(sURL); udFju&!W HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); YZl%JX httpConnection.setRequestProperty("User-Agent","NetFox"); %?hLo8 String sProperty = "bytes="+nStartPos+"-"; 6W=:`14 httpConnection.setRequestProperty("RANGE",sProperty); Bs?F*,zDJ Utility.log(sProperty); E<uOk QZr<=}
9C;Y5E~'L InputStream input = httpConnection.getInputStream(); uw=Ube( //logResponseHead(httpConnection); ?vFh)U k_>{"Rc C8:"+; byte[] b = new byte[1024]; }qhK.e int nRead; 5$U>M while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) kW&Z%k { qD*\}b]9I
nStartPos += fileAccessI.write(b,0,nRead); LFyceFbm //if(nThreadID == 1) l7,qWSsnK // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Zk
UuniO } uR@`T18 Qiw4'xQm t5X
lR]` w Utility.log("Thread " + nThreadID + " is over!"); #@^w>D6W bDownOver = true; gF6j6 //nPos = fileAccessI.write (b,0,nRead); j7#GqVS' } i@5%d!J catch(Exception e){e.printStackTrace ();} c)MR+'d\WO } ]Cn*C{ } [IFRwQ^%_O X'7S|J6s jHH //打印回应的头信息 O/9%"m:i public void logResponseHead(HttpURLConnection con) WV1 Z { |HGb.^f? for(int i=1;;i++) Us,[x Q { JjLyV`DJ String header=con.getHeaderFieldKey(i); _F@p53WE if(header!=null) "jO3Y/>S //responseHeaders.put(header,httpConnection.getHeaderField(header)); @O}j:b Utility.log(header+" : "+con.getHeaderField(header)); sLdUrD% else o?K|[gNi break; 6bKO;^0 } Dh No +"!z } otf%kG w ll\^9
4]Q k(z<Bm public void splitterStop() xg,]M/J { NK9WrUj) bStop = true; eD{ @0& } 8='21@wrN <nTmZ-; ef}E.Bl } <hZ}34?]i2 hYc{9$ lzs(i2pA /* *rcuhw"^b# **FileAccess.java D4Y!,7WEVt *//文件访问(定位,写) CKt|c!3 7 package NetFox; ESxC{
" import java.io.*; /~l/_Jct@G }&T<wm! >'-w%H/ public class FileAccessI implements Serializable{ t 9n j22#Bw //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 OZ!$%.?l RandomAccessFile oSavedFile; L\Fu']l long nPos; >9<8G]vcH O%K?l}e S2ppKlVv public FileAccessI() throws IOException =HV-8C] { xcZ%,7 this("",0); HS6Imi } TdP{{&'9 ~26s7S} #EmffVtY public FileAccessI(String sName,long nPos) throws IOException frmqBC VJ: { {8#N7(%z oSavedFile = new RandomAccessFile(sName,"rw"); `+hy#1] this.nPos = nPos; Md>f oSavedFile.seek(nPos); ok3 } a|P~LMPM B2G5hbaA Z0"& public synchronized int write(byte[] b,int nStart,int nLen) Naf`hE9 { !*?(Q6 int n = -1; O:,2OMB}B` try{ P10p<@? oSavedFile.write(b,nStart,nLen); Ukx/jNyYv n = nLen; tC?Aso } 1( ?CNW[ catch(IOException e) }^pQbFku { n-y^7'v e.printStackTrace (); iijd$Tv } -?aw^du yF/< : -.b
I o return n;
HTUYvU*- } W7*_ T] ^3WIl] 53`9^|: } 9uw,-0*5 hnsa)@ @0vC v /* Tw`c6^%^y **SiteInfoBean.java iM/*&O} */ tB ,. package NetFox; g]Xzio&w 68p\WheCal Qh|-a@ public class SiteInfoBean { u+z .J4w Ufaqhh
1o|0x\ q private String sSiteURL; //Site's URL 6VH90KAT private String sFilePath; //Saved File's Path v?YdLR private String sFileName; //Saved File's Name e7XsyL'|p private int nSplitter; //Count of Splited Downloading File eg$5z
Z {{.sEi* Y( 1L>4 public SiteInfoBean() z;bH<cQ {//nSplitter的缺省值为5 ~'^!udF- //default value of nSplitter is 5 :7$\X[ this("","","",5); ^_*jp[!`b$ } SRt$4EL21 ZL-uwI!`D vh|Tb5W< public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 5W[3_P+ { IqhICC1V- sSiteURL= sURL; 7>PF ~= sFilePath = sPath; CJMaltPp& sFileName = sName; P"R97#C this.nSplitter = nSpiltter; _.d}lK3$2 \3H<z@; (30<oE{ } t$]&,ucW# 'a;ini di3 B=A>3 public String getSSiteURL() ;[TljcbS { 943I:, B return sSiteURL; L4YVH2`0) } ="3a%\ (orrX Ez |5oKq'(b public void setSSiteURL(String value) {yvb$ND|j{ { Y!++CMzU sSiteURL = value; Y<p zy8z } 1DEO3p <a8#0ojm WF ?/GN public String getSFilePath() T!u'V'Ei2 { qDby!^ryc return sFilePath; a.
h?4+^bN } xa87xX=a o &BPG@n G$;>ueM public void setSFilePath(String value) v}7@CP]nV { Cz'xGW{ sFilePath = value; !lR0w| } KWFyw>*) ftYR,!& b@=zrhQ public String getSFileName() cT/3yf {
;Y
Dv.I return sFileName; P['X<Xt8 } IXGW2z; [ 3$.* tO?21?AD D public void setSFileName(String value) 7*zB*"B'1t { qTyg~]e9( sFileName = value; KK:N [x } kx|me~I
7d3'CQQ4 '"oo;`g7 public int getNSplitter() >?S\~Y { [X;>*- return nSplitter; %z(9lAe } WwW"fkv NNwc!x)* (N,nux(0k public void setNSplitter(int nCount) |WB"=PE { WI,40&< nSplitter = nCount; 0(wf{5 } uVN.= } >HE,' 4Z*|Dsw ,+~2&>wj /* @Ppo &> **Utility.java N g58/}zO */ y&7YJx package NetFox; |kId8WtA q#;BhPc ?#?e(mpo public class Utility { D^|jZOJ Uf# PoQ!y 'KSa8;:=C public Utility() .FuA;:@%\ { a lrt*V|= CNut{4 Was'A+GZ } F#6cF=};@ DYX-5~;! //线程睡眠 /E)9v$! public static void sleep(int nSecond) iDZrK%fl { <lFdexH"T try{ ]x2Jpk99a Thread.sleep(nSecond); ~NxEc8Y } l$M$o( catch(Exception e) Hfke { 3Q",9(D e.printStackTrace (); h9)RJSF4 } F@9Y\. , } pqJ)G;%9 5)mVy?Z //日志 ` "B^{o public static void log(String sMsg) Y =9j2 ]t { 4K E)g System.err.println(sMsg); UIn^_}jF` } ?gLAWz /M:H9Z8! V7P6zAJy public static void log(int sMsg) oB4#J* { .vK.XFZ8R System.err.println(sMsg); qh$X^%g } c)03Ms4
D } _D-5}a" 3g;T?E YX_vv!-] /* A]j}' **TestMethod.java zHV|-R */ L%f;J/ package NetFox; 57U%` IdF$Ml#[h 4Hk6b09 public class TestMethod { r
^MiRa mk\i}U>` y<|)'( public TestMethod() h`lmC]X_ { ///xx/weblogic60b2_win.exe lcCJ?!lsSW try{ 6%%PP8.F SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 2% %|fU9 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); l]$40 j SiteFileFetch fileFetch = new SiteFileFetch(bean); }%+qP+O\ fileFetch.start(); Y[?`\c| } LP ,9<&"< catch(Exception e){e.printStackTrace ();} )=Zsv40O o_O+u%y EX4
C.C|d } l&3ki! PRwu Q3,=~}ZNK public static void main(String[] args) *="m3:c'J { ?ql2wWsQO new TestMethod(); l
DnMjK\M } Z:|9N/>T } VJg,~lQN#t 点击下载更多相关资料
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