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/* HP[M"u **SiteFileFetch.java <io;d$=} */ GFYHt!&[\ package NetFox; p-2PC{% t| import java.io.*; ]4)$dQ59 import java.net.*; - ]U2G: xn2f!\%p l1"* public class SiteFileFetch extends Thread { y-@{ m+pFU?<| M}N[> ,2' SiteInfoBean siteInfoBean = null; //文件信息Bean ::p(ViYG long[] nStartPos; //开始位置 <4D.H long[] nEndPos; //结束位置 .2QZe8" FileSplitterFetch[] fileSplitterFetch; //子线程对象 L9,O,f long nFileLength; //文件长度 PsyXt5Dk boolean bFirst = true; //是否第一次取文件 (aSY.#; boolean bStop = false; //停止标志 _F tI2G9 File tmpFile; //文件下载的临时信息 U3M;6j9` DataOutputStream output; //输出到文件的输出流 =.t3|5U8 UO_tJN#X //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Bx ru7E" public SiteFileFetch(SiteInfoBean bean) throws IOException ~)]R { YC =:W siteInfoBean = bean; xtX`3=s //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); yMK VF`D* tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); t@3y9U$ if(tmpFile.exists ()) OEXa^M4x
{ >vfbXnN bFirst = false; rHD_sC* read_nPos(); fwz-)?
} !)LVZfQ0 else eBg:[44V { 71OQ?fc nStartPos = new long[bean.getNSplitter()]; .v_-V?7 nEndPos = new long[bean.getNSplitter()]; 0yBiio } }"6
PM)s +YCKd3/ yFjjpEpnFt "D7wtpJ } ,2Q5'!o "4/J4'- ,O1/|Y public void run() b'
fcWp0 { 2#xz,RM. //获得文件长度 xA]}/* //分割文件 O
<"\G!y~ //实例FileSplitterFetch N:&EFfg3 //启动FileSplitterFetch线程 >\ x!a:} //等待子线程返回 a0
8Wt try{ ! ^TCe8 if(bFirst) tY!GJusd { bTW#
f$q:4 nFileLength = getFileSize(); RKO}
W#? if(nFileLength == -1) _REAzxeS { q?bKh*48 System.err.println("File Length is not known!"); tIL ]JB } th`pf else if(nFileLength == -2) }BJR/r { D;+sStZK3 System.err.println("File is not access!"); +$
0wBU } 4LkW`Sbm else /=S\v<z { &v g[k#5 for(int i=0;i<nStartPos.length;i++) 8m 5T
{ -^&NwLEv= nStartPos = (long)(i*(nFileLength/nStartPos.length)); HAdDr!/` } V~"-\@ for(int i=0;i<nEndPos.length-1;i++) }^zsN` { tu5T^"BqO nEndPos = nStartPos[i+1]; 0^>b=a } 4-JyK%m,0 nEndPos[nEndPos.length-1] = nFileLength; W9/HM ! } !]t5(g_ } `xF^9;5mi Qk]^]I f7oJ6'K //启动子线程 Y [%<s/ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; s|9[=JMG for(int i=0;i<nStartPos.length;i++) ND\M { 2OsS+6,[x fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !6*m<#Qm siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), W>y& nStartPos,nEndPos,i); }5]7lGR Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); VhLS*YiSY fileSplitterFetch.start(); >h{)7Hv } }}gtz-w // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), J)._&O$ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 0Q!/A5z // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", qw6i|JM% nEndPos = " + nFileLength); _DLELcH
Y // fileSplitterFetch[nPos.length-1].start(); 0rCQz3gh1 uG=~kO ~+CEek //等待子线程结束 fRomP-S //int count = 0; bO+]1nZ. //是否结束while循环 <KBS ;t="1 boolean breakWhile = false; a9g~(#?a (qDPGd*1 k]9+/$ while(!bStop) tx ,q=.( { @!p0<&R@x write_nPos(); l-?#oy Utility.sleep(500); DAf0bh" breakWhile = true; jhH&}d9 3#N`n |UgC g+3_ $qIQ+ for(int i=0;i<nStartPos.length;i++) A\ r}V- { j] J-#J if(!fileSplitterFetch.bDownOver) EHk$,bM { _@OS,A breakWhile = false; KtD
XB> break; Hb3t|<z } __|Y59J% } bkFO4OZd if(breakWhile) N^f_hL|:9 break; r -$VPW /_1q)`NYy *>E_lWW. //count++; {h0T_8L/ //if(count>4) d9q`IZqee // siteStop(); !nL>Ly } KpC!C9 Of
m0{c= /p$+oA+ System.err.println("文件下载结束!"); TGHyBPJb } (Rh$0^)A catch(Exception e){e.printStackTrace ();} U3~rtc* } y
'Ah*h A$70!5* bMB*9<c~ //获得文件长度 @]7s`? public long getFileSize() $g_|U:, { .S*VYt%K7 int nFileLength = -1; <FfmDR try{ 0( q:K6zI} URL url = new URL(siteInfoBean.getSSiteURL()); )3.=)?XW HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [xo-ZDIoG httpConnection.setRequestProperty("User-Agent","NetFox"); {Kz!)uaC ZC"a#rQ Q[)3r
,D int responseCode=httpConnection.getResponseCode(); .S[M:<<* if(responseCode>=400) ,0f^>3&n>e { W/<Lp+p processErrorCode(responseCode); 9D]bCi\ return -2; //-2 represent access is error S4VM(~,o } l'7'G$v ^ddC a >~jl0!2z@ String sHeader; X3'd~!a) iX-.mq$ m=rMx]k for(int i=1;;i++) q\xsXM { Zs2;VW4RW //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ]z8Th5a?o //Utility.log(in.readLine()); pgBIYeY, sHeader=httpConnection.getHeaderFieldKey(i); YRQ?:a{H if(sHeader!=null) z}F^HQ1 { 2TgS
) if(sHeader.equals("Content-Length")) uAu'2M,_ { XZT|ID_u" nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); O Ke
9/._ break; JqV}$E"M2 } <[vsGUbc } f`YHZ
O else 49=
K]X break; (t5vBUj } EQ]>^VE2B } v%7Gh-P catch(IOException e){e.printStackTrace ();} W@RD
bsc catch(Exception e){e.printStackTrace ();} Z-3("%_$/ }=A+W2D W&HxMi Utility.log(nFileLength); @H}{?-XyA 5Gm8U"UR jT`u!CwdT return nFileLength; U/ax`_ } pnUL+UYeM PZj}]d ` ']N\y6=fn9 //保存下载信息(文件指针位置) 9M-W 1prb private void write_nPos() )}u?ftu\ { 4U3 `g try{ <5zr|BTF]F output = new DataOutputStream(new FileOutputStream(tmpFile)); Zt}b}Bz output.writeInt(nStartPos.length); -$I$z o for(int i=0;i<nStartPos.length;i++) EAHdt=8W{ { OZ/"W)
// output.writeLong(nPos); H(kxRPH4@] output.writeLong(fileSplitterFetch.nStartPos); =.l>Uw! output.writeLong(fileSplitterFetch.nEndPos); mR~S$6cc } JFq<sY! output.close(); >7z(?nQYT^ } lo-VfKvy catch(IOException e){e.printStackTrace ();} 5a4i)I63o catch(Exception e){e.printStackTrace ();} %~P3t=r } \d3 ~kq3 )5fly%-r) 3xgU=@!; //读取保存的下载信息(文件指针位置) ,{_56j^d, private void read_nPos() -`$J& YU { }!"Cvu try{ ( dh9aR_a DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); #)s
+I2 int nCount = input.readInt(); iLN O}EUL nStartPos = new long[nCount]; O^8=Xj#} nEndPos = new long[nCount]; Zzmo7kFx3 for(int i=0;i<nStartPos.length;i++) 7!;zkou { V P(JV nStartPos = input.readLong(); 7Kpv fyL{ nEndPos = input.readLong(); 2InM(p7j~K } u+c2
m input.close(); z\YLO%Mm } Mm!;+bM% catch(IOException e){e.printStackTrace ();} op3a*KG catch(Exception e){e.printStackTrace ();} uQKo2B0 } QcX&q%*0 wbI1~/ AmJdZs|/ private void processErrorCode(int nErrorCode) J+wnrGoK { "LH3ZPD System.err.println("Error Code : " + nErrorCode); ?xuWha@: } :w)9(5 ;zd.KaS GC_c.|'6[ //停止文件下载 -j1]H"- public void siteStop() *?A!`JpJn { nZM]EWn bStop = true; u9 5D0S for(int i=0;i<nStartPos.length;i++) qpzyl~g:C fileSplitterFetch.splitterStop(); dF5y'
R' |io)?`pj -Rx;"J.H } ^}`24~|y } B~b
='jN //负责部分文件的抓取 -Ir>pY\! **FileSplitterFetch.java 5W=Jn?y2 */ m -0EcA/ package NetFox; #99 =wn rC_saHo>#R w O6>jW
7 import java.io.*; \ 7IT[<Se import java.net.*; (iIzoEpb8W x:h)\%Dg< c2L\m*^o public class FileSplitterFetch extends Thread { !#W3Q dp4vybJ M.bkFuh String sURL; //File URL ?}= $zN long nStartPos; //File Snippet Start Position ~_IQ:]k long nEndPos; //File Snippet End Position riRG9c | int nThreadID; //Thread's ID 7r2p+LP[ boolean bDownOver = false; //Downing is over #w8.aNU+] boolean bStop = false; //Stop identical 50a';!H FileAccessI fileAccessI = null; //File Access interface &VcO,7 A| K /%5\h b$- g"F public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException b5ul|p { J*m7
d4^ this.sURL = sURL; &wN}<Ge6 this.nStartPos = nStart; r%NzKPW' this.nEndPos = nEnd; M#Q"h5l nThreadID = id; wWSE[S$V fileAccessI = new FileAccessI(sName,nStartPos);//定位 G[u{! 2RS } : %uaaFl ?b93! Q1 nB]mj_)R^ public void run() 1&vR7z]* { `wr*@/P while(nStartPos < nEndPos && !bStop) #%L_wJB- { o/[Ks;l T_#8i^;D *SpE
XO try{ 7xR:\FBa^ URL url = new URL(sURL); ` k(Q: HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); sbFIKq] httpConnection.setRequestProperty("User-Agent","NetFox"); t~BWN String sProperty = "bytes="+nStartPos+"-"; vsQvJDna~ httpConnection.setRequestProperty("RANGE",sProperty); _>r(T4}] Utility.log(sProperty); jhBfy|Ftu P*OT&q Z`|\%D% InputStream input = httpConnection.getInputStream(); InRcIQT //logResponseHead(httpConnection); L3 KJ~LI ;0NJX)GL J6ed byte[] b = new byte[1024]; t<RPDQ> int nRead; Kaaz,C.$^ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) A
PrrUo { M
9NT%7Il nStartPos += fileAccessI.write(b,0,nRead);
*I}_g4 //if(nThreadID == 1) oel?w e6 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); F+j"bhe } B~J63Os/ ed`7GZB L$@+'Qn@: Utility.log("Thread " + nThreadID + " is over!"); )@!T_# bDownOver = true; J3B+WD] //nPos = fileAccessI.write (b,0,nRead); Z&=Oe^ } }mI0D>n catch(Exception e){e.printStackTrace ();} >6IUle>z } 51*[Ibx } t2|0no /gex0w O7yj< //打印回应的头信息 r=p^~tuyxr public void logResponseHead(HttpURLConnection con) AJ3Byb=. { cIK4sOTJ& for(int i=1;;i++) _1WA:7$C { kf#S"[/E String header=con.getHeaderFieldKey(i); NzN"_o jM if(header!=null) Zv?"1Y< L //responseHeaders.put(header,httpConnection.getHeaderField(header)); y{~tMpo< Utility.log(header+" : "+con.getHeaderField(header)); I|;C}lfp else W7{^/s5r break; B|{E[]iK } 5KIhk`S } yS3or(K #\O'*mz QIJ/'72 public void splitterStop() i [Wxu M { {XD':2E bStop = true; D=Yr/qc? } "v0SvV<7 hW6Ksn,* c `.BN( } 77wod}h!: ,DEcCHr, 563ExibH /* KuL+~ **FileAccess.java "|R75m,Id *//文件访问(定位,写) OI3j!L2f package NetFox; OKk"S_` import java.io.*; `DM)tm3&m Y##lFEt @RL'pKab9 public class FileAccessI implements Serializable{ s?4nR:ZC} LvZ',u} //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 $@L2zl1 RandomAccessFile oSavedFile; +oHbAPs8 long nPos; ou`KkY|| =)*ZrD Y^;izM} public FileAccessI() throws IOException z\?<j%e!t { 4]-7S l, this("",0); 02,.UqCz } hF`<I.z} 'tU \~3k | h+vdE8 public FileAccessI(String sName,long nPos) throws IOException c\O2|'JzE { !|- U, oSavedFile = new RandomAccessFile(sName,"rw"); zJ:%iL@ this.nPos = nPos; xuVc1jJH oSavedFile.seek(nPos); ]\k&
l
[' } <'7s3 x"cB8bZ!$ IYH4@v/# public synchronized int write(byte[] b,int nStart,int nLen) 5g$>J)Ry { 1'8-+?r int n = -1; mgM"u94-] try{ xO,;4uE oSavedFile.write(b,nStart,nLen); ]KG.-o30 n = nLen; h~z}NP } u0g"x_3 catch(IOException e) L{&=SR. { Vo%Z| e.printStackTrace (); {z;4t&5
} " SP6o A..`?oGj !,]c}Y{i return n; =^_a2_BBl } G2+ gEg +Yc@<$4 k2PK4Ua_}q } (hIo0. 9wO2`e ) /N obS'd /* fL]jk1.Xv- **SiteInfoBean.java ?,%PemN */ whrDw1>( package NetFox; BNFYUcVP S_RP&+!7 |Q";a:&$ public class SiteInfoBean { ,e'"SVQc
M=SrZ,W >J_P[v private String sSiteURL; //Site's URL {))Cb9' private String sFilePath; //Saved File's Path |YfJ#Agm+ private String sFileName; //Saved File's Name ?[Ma" l> private int nSplitter; //Count of Splited Downloading File Q~P|=* GhjqStjS&l {K?e6-N(z public SiteInfoBean() >J)4e~9EJ2 {//nSplitter的缺省值为5 eV}H //default value of nSplitter is 5 6\-u:dvGI? this("","","",5); Dk8@x8
} Kxz|0l ~ tN/ BglbQ'6p public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) {y%@1q%" { 5@I/+D sSiteURL= sURL; "}H2dn2n sFilePath = sPath; gFfKK`)}D' sFileName = sName; \ Z5160 this.nSplitter = nSpiltter; peOoZdJd 5P 5Tgk cR*~JwC: } *~b~y7C {MDM= ;WP_ ]#G1
]U public String getSSiteURL() 0[N1SY\lj { LB}J7yEQvj return sSiteURL; [
q[2\F?CE } ,Tk53 " zqZ/z>Gf NmF8BmIj public void setSSiteURL(String value) 2 &_>2"=<@ { &fU48n1Uh sSiteURL = value; N S*Lv } |+>U91! ?|!m J Rj{Q 1J public String getSFilePath() 9jNh%raG| { R|wS*xd , return sFilePath; xj3{Ke`6 } FT J{ t}OzF cyqN && PZ; public void setSFilePath(String value) 7 `c! { ]v]:8>N sFilePath = value; W ,v0~ } wqJl[~O$ iWW
>]3Q /WK1( B: public String getSFileName() P.1Z@HC { V-X Ty
iv return sFileName; 3v `@** } \YF07L]qs- ,^eOwWV U%;E: | public void setSFileName(String value) A* Pz-z>z { >*n4j: sFileName = value; EV-# E } Bqb`WX[<` 4nh0bI N1 dNov= w public int getNSplitter() [6/8O { NZFUC D) return nSplitter; :()K2<E } :/t_5QN 8|5+\1!#/) 6Lg#co}9 public void setNSplitter(int nCount) 3 +`,'Q9 { fRkx ^u
P nSplitter = nCount; 6k<3,`VV| } x;LO{S4Z } B7oUS}M 2=1qmQE kqq1;Kd /* s;]"LD@ **Utility.java gi)C5J4
*/ h,b_8g{! package NetFox; $Q,]2/o6n m#RMd,'X +OtD@lD`! public class Utility { ((^vsKT 1Oak8 \G -SzCeq(p%5 public Utility() L6ypn)l { cFuQ>xR1 ?MFXZ/3(ba mS0;2xU } ;<xPzf 7_rDNK@e //线程睡眠 u
bZ`Y$ public static void sleep(int nSecond) e:_[0# { mmCGIX try{ l Ttc# Thread.sleep(nSecond); C+mPl +}w } mD*!<<Sw catch(Exception e) P4c}@Mq3 { !FB2\hiM e.printStackTrace (); 1 CV? } 9[`\ZGWD } f2v~: u (#>Q#Izr //日志 x`'s public static void log(String sMsg) v3kT~uv { 47A[-&y*X System.err.println(sMsg); j)juvat } fWF!% |L s!Iinc^p h/// public static void log(int sMsg) Mt%Q5^ { h96<9L System.err.println(sMsg); Qkw_9 } _p9 _P g8 } &._Mh Z uP3/d <xH!
Yskc /* s9fEx-!y **TestMethod.java v`:!$U*
H= */ pJ H@v
&a package NetFox; ^ lM.lS>) ETtoY<`# G;v3kGn public class TestMethod { 2qfKDZ9f^ v!%VH?cA8 #kPsg9Y public TestMethod() @w@ `-1 { ///xx/weblogic60b2_win.exe $z'_Hr' try{ :,Ad1( SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); VfJdCg_ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); JzuP AI SiteFileFetch fileFetch = new SiteFileFetch(bean); T,fDH!a fileFetch.start(); U~YjTjbd } H4JwgQ catch(Exception e){e.printStackTrace ();} yDXW#q pJPP6Be< W,sPg\G 3 } UWg+7RL l. 0|>gj`0 x]<0Kq9K public static void main(String[] args) L<H6AzR+ { EGJrnz8 new TestMethod(); m005*>IY } /faP@Q3kR } y`p(}X`> 点击下载更多相关资料
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