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/* mTG v*=l **SiteFileFetch.java *XRAM. */ }yde9b?F package NetFox; >heFdKq1 import java.io.*; a<-'4D/ import java.net.*; i
*W9 4 8*sZ/N. $O}:*.{(W public class SiteFileFetch extends Thread { +b<q4W kHj|:,'sV =yn|.%b SiteInfoBean siteInfoBean = null; //文件信息Bean <I}O_:% long[] nStartPos; //开始位置 +9S_H( long[] nEndPos; //结束位置 ! }u'% FileSplitterFetch[] fileSplitterFetch; //子线程对象 crV2T long nFileLength; //文件长度 iHKWz)0 boolean bFirst = true; //是否第一次取文件 ^j"*-)R boolean bStop = false; //停止标志 m2!y;)F0 File tmpFile; //文件下载的临时信息 iqCZIahf DataOutputStream output; //输出到文件的输出流 dA;f`Bi;Q c< ke)@ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) `4Jlf! public SiteFileFetch(SiteInfoBean bean) throws IOException *],]E; { wYTF:Ou^5~ siteInfoBean = bean; 7O3 \ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); IuJj;L1 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 0~qnwe[g} if(tmpFile.exists ()) %<x2=#0 { /\=syl bFirst = false; L;a>J read_nPos(); -]1F]d } X{SD3j=G# else /b *VFA/75 { 6qsT/ nStartPos = new long[bean.getNSplitter()]; JJL#Y nEndPos = new long[bean.getNSplitter()]; FKU$HQw* } Mz}yf5{f joa|5v' >L6V! #q`-"2"| } 1:I47/ $0[T=9q <+ MjIp~?* public void run() <a@'Pcsk { ;U6z|O7L //获得文件长度 \ "193CW! //分割文件
Vj^<V|= //实例FileSplitterFetch AplXl= //启动FileSplitterFetch线程 ") Xy%C`J //等待子线程返回 :G#>): try{ mz\d>0F U. if(bFirst) XP
Nk#" { Jj:4l~b,w nFileLength = getFileSize(); B2UQO4[w if(nFileLength == -1) (uBevU\ { _h#SP+> System.err.println("File Length is not known!"); 5f&+(Wqw } *M*:3v
0 else if(nFileLength == -2) vO#4$, { (/J$2V5- System.err.println("File is not access!"); 86J7%;^Xa } 5;=,BWU else I 2JE@? { rYI9?q for(int i=0;i<nStartPos.length;i++) ^:Vwblv( { 4u;db_gX nStartPos = (long)(i*(nFileLength/nStartPos.length)); cX$ Pq } # [c`]v for(int i=0;i<nEndPos.length-1;i++) \hSOJ,{)U { ~2Jvb[IM nEndPos = nStartPos[i+1]; ]$)J/L(p/] } y:Ycn+X. nEndPos[nEndPos.length-1] = nFileLength; jBexEdH
} bqmOfGM } SooSOOAx[ Z/=x(I0 m09
Bds //启动子线程 {b4+ Yc fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 31b9pi}nf for(int i=0;i<nStartPos.length;i++) Rg! [ic ! { "g7`Ytln fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), .@{W6
/I siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), uQ4WM nStartPos,nEndPos,i); Z2d,J>- Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); $_,?SXM fileSplitterFetch.start(); SdF*"]t } R3;GMe@D# // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7[)4k7 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ~Ein)5 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", U[5 nEndPos = " + nFileLength); Z IfhC' // fileSplitterFetch[nPos.length-1].start(); DJSSc D@T>z; AtNu:U$ //等待子线程结束 oWGtKtDhH //int count = 0; J[fjl6p //是否结束while循环 Cg NfqT0 boolean breakWhile = false; B42.;4"T %h;~@- $ Bfw]#"N` while(!bStop) M|e
Qds { *RKYdwnb write_nPos(); (I~-mzu\ Utility.sleep(500); {4"!~W breakWhile = true; )cc:Z7p :4|W;Lkd! [4,=%ez for(int i=0;i<nStartPos.length;i++) y~_wr}.CS { 2T!pFcc if(!fileSplitterFetch.bDownOver) &-#!]T-P:E { e=KA|"vxh breakWhile = false; >
t *+FcD break; kDuN3 } ws:@Pe4AF } |}paa if(breakWhile) F Vkb9(WW break; f1F#U@U $5aRu, T
'pX)ZH //count++; Kx.I'_Qk //if(count>4) .L'>1H]B // siteStop();
ks=jv: } _1[5~Pnh (C/2shr 8 ON~jt[ System.err.println("文件下载结束!"); fw@n[u{~ } '6*^s&H~ catch(Exception e){e.printStackTrace ();} 2<Lnfc<^k } d*ch.((- >x0"gh 1au1DvH //获得文件长度 "\bbe @ public long getFileSize() MKSiOM { fvKb0cIx] int nFileLength = -1; ]c,ttS_ try{ Afi;s., URL url = new URL(siteInfoBean.getSSiteURL()); [4'C4Zl HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 6?nAO httpConnection.setRequestProperty("User-Agent","NetFox"); .XR`iXY &VtTUy} dXgj int responseCode=httpConnection.getResponseCode(); zk8s?$ if(responseCode>=400) 1euL+zeh { gZ6]\l]J{ processErrorCode(responseCode); uev$5jlX return -2; //-2 represent access is error /Y("Q#Ueq } )`?Es8uW co<-gy/mCR 47s<xQy String sHeader; q6'3-@% NqcmjHvy WT$m*I for(int i=1;;i++) Z+h^ ie"g { /7#KkMg //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); -.=q6N4 //Utility.log(in.readLine()); "2HSb5b"` sHeader=httpConnection.getHeaderFieldKey(i); <H3 njv if(sHeader!=null) iL f:an*vH { Dpp3]en. if(sHeader.equals("Content-Length")) w7NJ~iy { c RBdIDIc nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ]O2ku^yM break; v2R41*z, } %KL"f } L|4kv else !HyPe"`oL break; 6@kKr } qa
'YZE` } ?eD,\G catch(IOException e){e.printStackTrace ();} e R"XXF0u catch(Exception e){e.printStackTrace ();} K2PV^Y FT'_{e!M 6v7H?4 Utility.log(nFileLength); S'~Zlv3` :Z|lGH
= |&vQ1o|} return nFileLength; | _/D-m* } [V'3/#Z tpw0j
CVu iR
j/Tm*T' //保存下载信息(文件指针位置) a86m?)-c private void write_nPos() /MHqt=jP6 { csZIBi try{ Am=D kkP% output = new DataOutputStream(new FileOutputStream(tmpFile)); hM output.writeInt(nStartPos.length); O8#}2 for(int i=0;i<nStartPos.length;i++) ZC+F*:$ { idiJ|2T"G // output.writeLong(nPos); <1#v}epD# output.writeLong(fileSplitterFetch.nStartPos); 1.WdxMpW9 output.writeLong(fileSplitterFetch.nEndPos); ;!U`GN,tH } z^=.05jB output.close(); %Hdg,NH } Oq~>P!= catch(IOException e){e.printStackTrace ();} ;n?72&h
catch(Exception e){e.printStackTrace ();} W70J2 } #q. Q tDz lN94 b3_W BEM_y:# //读取保存的下载信息(文件指针位置) OMG.64DX . private void read_nPos() NQS@i'W=g { Pk444_"= try{ !%b.k6%>w DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Yjxa=CD int nCount = input.readInt(); Qd"{2> nStartPos = new long[nCount]; m[&]#K6 nEndPos = new long[nCount]; ~J1;Z0}# for(int i=0;i<nStartPos.length;i++) |0:&dw?*! { g0t$1cUR nStartPos = input.readLong(); WtF nEndPos = input.readLong(); gzqx{ ] } )%p.v P'p input.close(); UEmNT9V } S%n5,vwE catch(IOException e){e.printStackTrace ();} Y~]E6'Bz catch(Exception e){e.printStackTrace ();} 3f9J!B`n } ;8m_[gfw hU=n>g>nx I=)Hb?qT~ private void processErrorCode(int nErrorCode) 9u<4Q_I` { &$uQ$]&H System.err.println("Error Code : " + nErrorCode); Qj(q)!Ku } Q:?]:i/* h-`Jd>u" J \U}U'qP //停止文件下载 Th,15H
DA public void siteStop() sl^i%xJ|l' { ^44AE5TO bStop = true; @2Xw17[f35 for(int i=0;i<nStartPos.length;i++) >*rsR R fileSplitterFetch.splitterStop(); vH_QSx;C# 5`,qKJ dK|6p_ } ?,e7v.b } C!xq p
//负责部分文件的抓取 vwQY_J8 **FileSplitterFetch.java un|+YqLf */ }{;m:Iia_ package NetFox; 6LZ(bP'd; A,-UW+: *njdqr2c~ import java.io.*; ?H8w/{J import java.net.*; A `\2]t$z [/uqH $h1`-=\7 public class FileSplitterFetch extends Thread { 1zNH[
#W[/N|~wx xC;b<~zN String sURL; //File URL TS+itU62 long nStartPos; //File Snippet Start Position Q#NXJvI long nEndPos; //File Snippet End Position K(RG:e~R0i int nThreadID; //Thread's ID 9?<WRM3a> boolean bDownOver = false; //Downing is over ;taTdzR_ boolean bStop = false; //Stop identical '6i"pJ0% FileAccessI fileAccessI = null; //File Access interface 7z!|sPW](b Y$SZqW0!/ hMz= \)Pl public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException _?Zg$7VJ { HJ[@;F|aU this.sURL = sURL; Y6L_
_ RT this.nStartPos = nStart; |&Gm.[IX;q this.nEndPos = nEnd; KP"
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nThreadID = id; a$!|)+ fileAccessI = new FileAccessI(sName,nStartPos);//定位 *BzqAi0 } e m`z=JGG )s^D}I( |x*~PXb public void run() `
MIZqHM @ { 1HYrJb,d while(nStartPos < nEndPos && !bStop) :f (UZmV$ { b||
c^f
bmN'{09@ 9`kxyh</ try{ ~i 'Ib_%h URL url = new URL(sURL); ;w";s$ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); CDcZ6.f httpConnection.setRequestProperty("User-Agent","NetFox"); c!l=09a~a+ String sProperty = "bytes="+nStartPos+"-"; *gMo(-tN httpConnection.setRequestProperty("RANGE",sProperty); W0%cJ8~ Utility.log(sProperty); <PL94 Sw HrHj V'(yrz! InputStream input = httpConnection.getInputStream(); d*80eB9P //logResponseHead(httpConnection); /IS_-h7>XS ^g/ L+y}hb
r byte[] b = new byte[1024]; &P'cf|KI int nRead; (VeX[*}I while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) b4%sOn, { vd`;(4i#X nStartPos += fileAccessI.write(b,0,nRead); =\]5C //if(nThreadID == 1) A*tG[) // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %9ef[,WT } KEF"`VTB@ KSsv~!3Yf jA@js v Utility.log("Thread " + nThreadID + " is over!"); C}grY5: bDownOver = true; ST'M<G%4E //nPos = fileAccessI.write (b,0,nRead); `j+aAxJ=\ } Wt=QCutt catch(Exception e){e.printStackTrace ();} `8^4, } :%ms6j/B&V } Sx{vZS3 yn=BO`sgW "w3#2q& //打印回应的头信息 6qfL-( G public void logResponseHead(HttpURLConnection con) 1FC'DH! { Cx(|ZD^ for(int i=1;;i++) "%$jl0i_c { B3 f Kb#T String header=con.getHeaderFieldKey(i); Q;A1&UA2 if(header!=null) o%dKi] //responseHeaders.put(header,httpConnection.getHeaderField(header)); n/$1&x1 Utility.log(header+" : "+con.getHeaderField(header)); 1#rcxUSi else .bcoH break; Y*0 AS|r! } +o+e*B7Eh } NN(ZH73 t5
:4'%| n.+%eYM< public void splitterStop() c:QZ(8d]L { i*-[-hn-V bStop = true; La&?0P A } I =G3 >2Z0XEe Mrpz (}) } h RK& g}(yq:D V`*N2ztSL /* AAbI+L0m{ **FileAccess.java (`C#Tq *//文件访问(定位,写) PuyJ:#a package NetFox; ko-| hBNv import java.io.*; Mf 'T\^-! i=Nq`BoQf byALM public class FileAccessI implements Serializable{ @ol}~&"
S0-f_,( //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 }4'5R RandomAccessFile oSavedFile; 8%C7!l q long nPos; S#km`N` c8uFLM j 7 YS 'Tf public FileAccessI() throws IOException J+hiz3N { 04;E^,V this("",0); 4yOYw*X } -G\svwv@) $;GH
-+ Vl"20): public FileAccessI(String sName,long nPos) throws IOException <%d/"XNg[D { |"}F cS
y oSavedFile = new RandomAccessFile(sName,"rw"); Vf28R,~m this.nPos = nPos; MR") oSavedFile.seek(nPos); rw:z|-r } N{/):O zVEG)
Hr 4oxAC; L public synchronized int write(byte[] b,int nStart,int nLen) ^,W;dM2 { 5UWj#|t int n = -1; -"Mq<XO&51 try{ ].AAHu5 oSavedFile.write(b,nStart,nLen); <Wd#HKIG>l n = nLen; h2k"iO} } kwI[BF catch(IOException e) j!1
:+H_L { hA'i|;|ZYc e.printStackTrace (); ^/'zU, } 18*M *dmBJi} SX/E@vYb return n; Os)jfKn2 } 2A>s
a3\ SSr#MIS? &A/k{(.XP } 4F[4H\>' 7'IcgTWDZy =()Vrk|uK /* 7+(on **SiteInfoBean.java |DUWB; */ uU$YN- package NetFox; #)3luf3G
HB|R1<t;HB 7~zd
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public class SiteInfoBean { |B{@noGX dG8_3T}i ww? AGd private String sSiteURL; //Site's URL j\hI, mc private String sFilePath; //Saved File's Path d76nyQKK private String sFileName; //Saved File's Name a:v5(@8 private int nSplitter; //Count of Splited Downloading File LE@<)}Au^ ;!~&-I0l Z]~) ->=} public SiteInfoBean() %XC3V7 {//nSplitter的缺省值为5 Jn :h;|9w //default value of nSplitter is 5 S4ys)!V1V this("","","",5); T]_]{%z } "26=@Q^Y
R$|"eb5 yg@8&;bP` public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) o=zr]vv { }srmG|@: sSiteURL= sURL; E|,RM;7 sFilePath = sPath; 6 2*p*t sFileName = sName; >TQNrS^$J this.nSplitter = nSpiltter; s~p(59 ;_~9".'<d 3<
'bi}{ } 1m~-q4D)V W9D~:>^YP <5 )F9.$ public String getSSiteURL() $-i(xnU/nl { drwD3jx0xv return sSiteURL; 6*&$ha}X } F
tS"vJ\ 73p7]Uo ''Y'ZsQ; public void setSSiteURL(String value) `R!%k]$ { :L+%5Jq sSiteURL = value; 9)?_[|2 } ~T^,5Tz1j cM_!_8o x
DiGN Jc public String getSFilePath() _LSp \{Z { 1w!O&kn return sFilePath; jct|}U } Ur9L8EdC w/f?KN ,,c+R?D public void setSFilePath(String value) ?E}9TQ { -UoTBvObAm sFilePath = value; ]r\FC\n6e } : Tcvj5 BUs={"Pa PcQ\o>0") public String getSFileName() Y@y"bjK \ { /(u# D[ return sFileName; k>)Uyw$! } ;XIDu6 IZ_?1%q>} O))YJh"'_ public void setSFileName(String value) #&}j'oD|N { XW.k%H4@ sFileName = value; Nu;?})tF } HcQ)XJPK QJy1j~9x 2,6~;R public int getNSplitter() 0N87G}Xu { mUNAA[0 L return nSplitter; XI+GWNAmJ } Y#t9DhzFWo X #>:9 C
%i{{Y&l public void setNSplitter(int nCount) g#q7~#9 { UOpSH{N nSplitter = nCount;
^o87qr0g] } 8#nAs\^ } #62*'.B4 Cq -URih wq7h8Z}l /* Alk+MwjR **Utility.java `t"7[Zk */ f>iDqC4 package NetFox; cE^Ljk L0)w~F
?m %Jji<M] public class Utility { Urz9S3#\ < V*/1{ `x`zv1U public Utility() .lAPlJOO { ;efF]") xpJ=yxO m
al?3*x/ } H]}mg='kI mX%T"_^ //线程睡眠 pr[V*C/ public static void sleep(int nSecond) JM7FVB { ^WrL
try{ P(.XB` Thread.sleep(nSecond); ;@*<M\O } {%\@Z-9%q, catch(Exception e) vScEQS$> { n/{ pQ&B e.printStackTrace (); V aoqI } ,A5}HRW% } i#aKW' o)GesgxFa5 //日志 x];i?
4 public static void log(String sMsg) 6:q,JB@i { YwS/O N System.err.println(sMsg); &Oc
`|r* } fRb h$XoR0 `-.6;T}2U public static void log(int sMsg) D_?dy4\ { 82 dmlPwJC System.err.println(sMsg); :NL[NbQYt } #uV J } ;9Qxq] |~@yXc5a au]W*;x /* $:yIe.F **TestMethod.java vJ{F)0 K */ F1S0C>N?5 package NetFox; v
8EI Nt;1&dwUb (f2r4Io|} public class TestMethod { _F(Np\%_ ^E_chx-e} $o.;} public TestMethod() T[I7.8g { ///xx/weblogic60b2_win.exe bXeJk]#y try{ 86e aX+F SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 5|7<ZL3 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); k(M"k!M SiteFileFetch fileFetch = new SiteFileFetch(bean); O)ose?Z
fileFetch.start(); AV4fN@BX } XSCcumde! catch(Exception e){e.printStackTrace ();} @
M4m!;rM M~h.MPI A)gSOC{3F) } /'zXb_R,$ "sIww wwet90_g public static void main(String[] args) gi>W&6 { 0e07pF/! new TestMethod(); (5A8# 7a } F-F1^$]k } H]W'mm 点击下载更多相关资料
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