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/* WDY\Fj **SiteFileFetch.java c_qox */ EN`JzLjP package NetFox; h's[)
t import java.io.*; BPkMw'a: import java.net.*; E4Q`)6]0 w-WAgAch \)28,` public class SiteFileFetch extends Thread { ^r}Uu~A> )q'dX+4=eL <IR@/b!, SiteInfoBean siteInfoBean = null; //文件信息Bean Z6gwAvf< long[] nStartPos; //开始位置 ;,U@zB;\%( long[] nEndPos; //结束位置 eJqx,W5MK] FileSplitterFetch[] fileSplitterFetch; //子线程对象 FiQ&g*=| long nFileLength; //文件长度 Y_*KAr'{P boolean bFirst = true; //是否第一次取文件 g s1 boolean bStop = false; //停止标志 _~Od G File tmpFile; //文件下载的临时信息 /TbJCZ DataOutputStream output; //输出到文件的输出流 ^'Lp<YJs6 ^e "4@O" //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) %tkqWK: public SiteFileFetch(SiteInfoBean bean) throws IOException [x>Pf1 { W\<OCD%X siteInfoBean = bean; o7we'1(O //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ui8$ F
"I* tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); LGy62 y$ if(tmpFile.exists ()) 3 a(SmM: { +q2\3REzx bFirst = false; @ ~{TL read_nPos(); 7202N?a
{ } ,FYA*}[ else b7xOm"X,N { oBai9 [+ nStartPos = new long[bean.getNSplitter()]; d<?Zaehe\ nEndPos = new long[bean.getNSplitter()]; G8F;fG N } "nJMS6HJ[ fc:87ZR{K dG3?(}p+ ~mH'8K|l } oVuIHb0w lKQjG+YF
svo%NQ public void run() r_ 9"^Er { ~>]Ie~E: ( //获得文件长度 !pa7]cZ //分割文件 L) _ VdB //实例FileSplitterFetch 9%k4Ic%P //启动FileSplitterFetch线程 -[=@'NP //等待子线程返回 lh0G/8+C try{ `h'Ab63 if(bFirst) fm%4ab30T { T?n [1%K nFileLength = getFileSize(); ?fU{?nI}>p if(nFileLength == -1) 4`CO>Q { ;(g"=9e System.err.println("File Length is not known!"); $43CNnf3N } `ER#S_} else if(nFileLength == -2) ('_S1?y { "H=fWz5z System.err.println("File is not access!"); B aCzN;) } N:^4OnVR else W70BRXe04D { [eF|2: for(int i=0;i<nStartPos.length;i++) {=^<yK2q { jN+2+P%OL nStartPos = (long)(i*(nFileLength/nStartPos.length)); 9mv6 } )A;jBfr for(int i=0;i<nEndPos.length-1;i++) +I~U8v- { DqH]F S?] nEndPos = nStartPos[i+1]; a- /p/
I-% } k"`^vV[{F nEndPos[nEndPos.length-1] = nFileLength; 8/9YR(H3H } n*=Tm
KQ } z\IZ5' |R Qa.^. /P{'nI //启动子线程 6:TA8w| fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; SMm$4h R for(int i=0;i<nStartPos.length;i++) `O,"mm^@U { oA
]F`N= fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), X 0m6<q siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 7mS_Cz+cB nStartPos,nEndPos,i); SQ`ec95', Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); .V^h< d{ fileSplitterFetch.start(); ^6^A/]v } "8yDqm // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), h3-dJgb siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ^W,x // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 3DrW[\ nEndPos = " + nFileLength); QtqE&j // fileSplitterFetch[nPos.length-1].start(); 'P >h2^z BG@[m $-]PD`wmY //等待子线程结束 771r(X?Fa //int count = 0; v/C*?/ ~ //是否结束while循环 }D#[yE,=\ boolean breakWhile = false; 8F`799[p U[l{cRT
&
Mf nH while(!bStop) BO=j*.YKy { }2_i<4,L write_nPos(); ^cYt4NHXn Utility.sleep(500); :j!N7c{ breakWhile = true; ,HO@bCK ;!N_8{
7r !p"Ijz5 for(int i=0;i<nStartPos.length;i++) vJ!<7 l& { 0Z~G:$O/i if(!fileSplitterFetch.bDownOver) 'WQ<|(:{ { E@$HO_;& breakWhile = false; fxk6 q$' break; lw 9rf4RF } Dmv@ljwO } AVv 8Hhd if(breakWhile) HTUY|^^D break; ;F'/[l{+ c1Ta!p{% L%O(
I //count++; N,NEg4 q[ //if(count>4) o8lwwM* // siteStop(); !NFP=m1 } ,t_Fo-i7vI Arb-,[kwN q+-Bl System.err.println("文件下载结束!"); m`lsUN, } ^iq$zHbc0u catch(Exception e){e.printStackTrace ();} i^'Uod0d. } Fps.Fhm %@Ty,d:;= ?]L:j //获得文件长度 55T c public long getFileSize() [m3k_;[ { :X6A9jmd int nFileLength = -1; _mw(~r8R try{ KzC`*U[
URL url = new URL(siteInfoBean.getSSiteURL()); 5#U*vGVT HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); o!+jPwEU httpConnection.setRequestProperty("User-Agent","NetFox"); Q@lJ| #E(
n U0:tE>3` int responseCode=httpConnection.getResponseCode(); yr
/p3ys if(responseCode>=400) }Myi0I< { j.@TPf* processErrorCode(responseCode); 3%W
R return -2; //-2 represent access is error ~^Y(f'{ } ~\z\f}w $fE$j { 4V`ypFme String sHeader; .{1MM8 Q >Cjb|f3'i} G*|2qX"o for(int i=1;;i++) vO)nqtw { f}'E|:Z 7k //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); E30VKh | //Utility.log(in.readLine()); ci^+T * sHeader=httpConnection.getHeaderFieldKey(i); Tl!}9/Q5E: if(sHeader!=null) 5[|MO.CB$ { :B<lDcFKJ if(sHeader.equals("Content-Length")) EK^ld!g( { 7
C5m#e3 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); K/y#hP break; *HwTq[y } ;!k1LfN } @GYM4T else B=/*8,u break; yS#LT3>l } [Uezi1I } dOFxzk,g&R catch(IOException e){e.printStackTrace ();} b
"4W`
A catch(Exception e){e.printStackTrace ();} : /9@p }XiS:
=J,aB p Utility.log(nFileLength); _AQ :<0/# FxC@KZG )ll`F7B- return nFileLength; e/WR\B'1 } /0 ,#c2aq 4b8!LzKS bgd1j,PWbW //保存下载信息(文件指针位置) Ftm%@S ? private void write_nPos() G1Cn[F;e { p3*}! ez4 try{ "6n~,$ output = new DataOutputStream(new FileOutputStream(tmpFile)); X+{4,?04+ output.writeInt(nStartPos.length); S*:b\{[f> for(int i=0;i<nStartPos.length;i++) N`/6
By { nVoPTr // output.writeLong(nPos); #5T+P8 output.writeLong(fileSplitterFetch.nStartPos); ]OHzE]Q output.writeLong(fileSplitterFetch.nEndPos); D:llGdU#2 } vcAs!ls+ output.close(); `,&h!h(( } VuFH
>8n catch(IOException e){e.printStackTrace ();} U]fE(mpI9 catch(Exception e){e.printStackTrace ();} iwL\H a } jGEUl=W
l?B\TA^ V2%FWo| //读取保存的下载信息(文件指针位置) g^1M]1.f private void read_nPos() q[l},nw { KLs%{'[7: try{ TC3xrE:U<m DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); (hVhzw"~ int nCount = input.readInt(); G;FY2;adK nStartPos = new long[nCount]; V$-IRdb nEndPos = new long[nCount]; y&A*/J4P for(int i=0;i<nStartPos.length;i++) 0W9,uC2:N { 5>q|c`&}E nStartPos = input.readLong(); R1X9 nEndPos = input.readLong(); _I~W!8&w> } m"~$JA u input.close(); @Wy>4B^ } yuk64o2QE catch(IOException e){e.printStackTrace ();} vj^vzFb K catch(Exception e){e.printStackTrace ();} d)(61 } r<Ll>R 8MM#q+8 y_38;8ex private void processErrorCode(int nErrorCode) x9~d_>'A { 7Rk eV System.err.println("Error Code : " + nErrorCode); yEy}
PCJ& } #~q{6()e: oKiBnj5J Ezm ~SY //停止文件下载 <Jo_f&&{ public void siteStop() '
V;cA$ $ { q/?#+d bStop = true; \QstcsEt for(int i=0;i<nStartPos.length;i++) rcPP-+XW fileSplitterFetch.splitterStop(); a{QHv0goG ^/2n[orl5 fEWS3`Yy } vN-#Ej.
u } y|nMCkuX //负责部分文件的抓取 ^{_`jE **FileSplitterFetch.java s$:F^sxb */ u} JL*}Q package NetFox; L=Fm:O'#2 T#Qn\8 0~H(GG$VH import java.io.*; #q%xJ[ import java.net.*; &p^S6h ]ZelB,7q B8'" ^a^&- public class FileSplitterFetch extends Thread { ^UZEdR; +iir]"8 ,o]"G[Jk String sURL; //File URL [7ZFxr\:! long nStartPos; //File Snippet Start Position bg*4Z?[dd long nEndPos; //File Snippet End Position E#`=xg int nThreadID; //Thread's ID 07DpvhDQ boolean bDownOver = false; //Downing is over G@oY2sM" boolean bStop = false; //Stop identical 4iBp!k7 FileAccessI fileAccessI = null; //File Access interface =M>1;Qr<Z/ +#}I^N j#"?Oe{_1 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 13I
7ah { PCH&eTKN this.sURL = sURL; ``)ys^V this.nStartPos = nStart; L@2T this.nEndPos = nEnd; b-'41d}Hn nThreadID = id; xI55pj* fileAccessI = new FileAccessI(sName,nStartPos);//定位 4*g`!~) } b{=2#J- rJ4O_a5/ x'{L %c>L public void run() YQvN;W { t>. mB@se| while(nStartPos < nEndPos && !bStop) ~&4Hc%*IB { +N:K V}K )d!,,o Cb7f-Eag try{ QM=M<~<Voh URL url = new URL(sURL); 4pq@o HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); acz8
H0cS httpConnection.setRequestProperty("User-Agent","NetFox"); )Ge.1B$8h String sProperty = "bytes="+nStartPos+"-"; dFFJw[$8w httpConnection.setRequestProperty("RANGE",sProperty); Q"n*`#Yt' Utility.log(sProperty); MU4/arXy s9>f5u?dK Xi^3o InputStream input = httpConnection.getInputStream(); @cA`del //logResponseHead(httpConnection); uIvy1h9m +!6aB|- m_\w) byte[] b = new byte[1024]; S#Tc{@e int nRead; T$5u+4>" while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) i\lur ET { uo;aC$US nStartPos += fileAccessI.write(b,0,nRead);
3e~ab#/ //if(nThreadID == 1) U~n>k<`sr // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?Y7'OlO } _fx0-S*$ '^)Ve:K-. ")'o5V Utility.log("Thread " + nThreadID + " is over!"); YjN2 ,Xi bDownOver = true; WeNx9+2=Z //nPos = fileAccessI.write (b,0,nRead); dqMt6b\} } +e?mKLw14 catch(Exception e){e.printStackTrace ();} y|f`sBMM } ~G|un}g= } 3^AycwNBA .}n, ,e{( r0 //打印回应的头信息 /` 891(f, public void logResponseHead(HttpURLConnection con) -\6nT'P { z/6/ for(int i=1;;i++) Vw.c05 x { =r=[e}&9 String header=con.getHeaderFieldKey(i); q"xIW0Pc if(header!=null) hfT HP //responseHeaders.put(header,httpConnection.getHeaderField(header)); _Mq0QQ42 Utility.log(header+" : "+con.getHeaderField(header)); qplz != else ]H<5]({F break; )';Rb$<Qn } >Pne@w!* } wv0d"PKTS k~f3~- " ,_;+H*H>" public void splitterStop() os6p1"_\f { d\Cx(Lb[ bStop = true; CBw/a0Uck } np3$bqm 4|*b{Ni w:xLg.Eq6 } >^}nk04 KNT(lA0s q] g'rO' /* *#+e_)d **FileAccess.java E +\?|q !T *//文件访问(定位,写) AffVah2o: package NetFox; EQZu-S`kv import java.io.*; .3WDtVE @8WG 9Fb|B public class FileAccessI implements Serializable{ ^.bYLF 5sJi- ^ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 .w5#V| RandomAccessFile oSavedFile; lrSdFJ% long nPos; %-ih$ZY vlYDhjZk# ;%"YA public FileAccessI() throws IOException t}m6]; { w5*?P4P this("",0); #hL<9j } P|}~=2J DVCO(
fz |jB]5ciT public FileAccessI(String sName,long nPos) throws IOException p&1IK8i" { `:WVp~fn oSavedFile = new RandomAccessFile(sName,"rw"); _4qP0LCa this.nPos = nPos; g7*c wu oSavedFile.seek(nPos); j" wX7 } .5=Qfvi* J
}izTI mq~rD)T public synchronized int write(byte[] b,int nStart,int nLen) :$Lu
V5 { }'HJV B_ int n = -1; 0l#{7^e try{ d"zbY\` oSavedFile.write(b,nStart,nLen); <3\t J n = nLen; ca>6r` } RFF&-M] catch(IOException e) 7{=<_ { ow :}NI e.printStackTrace (); |~mq+:44+ }
KQsS)ju ".+wz1 $<^4G return n; `q Sfo` } I}oxwc F 7+Gt
Ed .<JD'%?" } arf`%9M S-[]z* 12)~PIaF /* dR2#n **SiteInfoBean.java 2!QS&i */ l'YpSO~l7
package NetFox; [~$Ji&Dd S!gV\gEbDj ]>h2h ?2te public class SiteInfoBean { CL/8p; uiq)?XUKv @]lKQZ^2& private String sSiteURL; //Site's URL Te?UQX7Z}M private String sFilePath; //Saved File's Path /$zYSP)YT private String sFileName; //Saved File's Name \ ?['pB private int nSplitter; //Count of Splited Downloading File (n7v $A e#`wshtN: }x% ;y]S public SiteInfoBean() 061@N=p8 {//nSplitter的缺省值为5 ,ZjbbBZ //default value of nSplitter is 5 V.J[Uwf this("","","",5); ^! ^8]u<Q } q[]EVs0$ew bG
nBV7b $5nOi aQL public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Ni IX^&N1 { w#_xV
= sSiteURL= sURL; }8 A] sFilePath = sPath; "PGEiLY sFileName = sName; cT^,[3i:c this.nSplitter = nSpiltter; ]t_AXKd J'tc5Ip!}V *{:FPmDU } Uj}iMw, w#k'RuOw5 Dw public String getSSiteURL() cF_`m { <jU[&~p return sSiteURL; 3EB8ls2 } ~=(?Z2UDA_ C)`ZI8 ->&AJI0 public void setSSiteURL(String value) pgT{#[=> { %YefTk8cr, sSiteURL = value; =3lUr<Ze } {c|nIwdB Ac<V!v71 ":?>6'*1 public String getSFilePath() )K>XLaG) { "v4;m\g&: return sFilePath; a^i`DrX } yd5r]6ej laqKP+G a9Lf_/w{ & public void setSFilePath(String value) |//cA2@. { V|
z|H$- sFilePath = value; 9a2Ga } *ghkw9/ cqr!* !TP8LQ public String getSFileName() Y&`Vs( { hFuS>Hx return sFileName; %yJL-6U } wA)
NB EaFd1 ^CI.F.#X| public void setSFileName(String value) u*{hXR-" { #*#4vMk< sFileName = value; E*>tFw&[ } o+`W lYT}Nc4"=" =1)yI>2e%} public int getNSplitter() %m!o#y(hD` { k=H{gt
return nSplitter; i;*c|ma1> } I>bLgt]u3 b*qkox;j jJ?MT#v public void setNSplitter(int nCount) ~el#pf~ { p9XHYf72 nSplitter = nCount; !tv3.:eT } 3X*;.'#Z } 's@v'u3 IK(G%dDw ,ZV<o!\ /* F*>:~'% **Utility.java y.JAtsxD */ < Upn~tH package NetFox; >k*QkIyq B~- VGT2o >pO[S[ public class Utility { ~xGWL%og IE: x&q`3 c%>t(ce`Tl public Utility() s2_j@k?% { ,f0cy\.? 7on$}=% MG[?C2KA/ } idvEE6I@ 'SYj Ehvw //线程睡眠 y&t&'l/m public static void sleep(int nSecond) jr~ +}|@{ { 4?><x[l2{ try{ y1cAw Thread.sleep(nSecond); u3Z*hs)Z% } [WXtR catch(Exception e) ,[,+ _A { {3yzC e.printStackTrace (); v+znKpE } -5>K
pgXo\ } 50rCW)[# 5b0Ipg //日志 D@^ r
public static void log(String sMsg) |iLeOztuE { -9} ]J\ System.err.println(sMsg); ]n${j/x } |q^e&M< ?T7`E q a^iefwsNc public static void log(int sMsg) PQWo<Uet { 3lMmSKN System.err.println(sMsg); J^hj
R%H } =:P9 $ } ZL #4X*zT h#^IT %N|7<n<S /* `XP]y= **TestMethod.java $7jJV (B */ bnWIB+%_ package NetFox; )+RGXVp 2[[pd&MJZ {O5;V/00} public class TestMethod { k
<A>J-| zbddn4bW9 3xsC"c> public TestMethod() <6mXlK3N0 { ///xx/weblogic60b2_win.exe R5X<8(4p try{ !a[
voUS SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); &1F)/$,v //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); -1Lh="US SiteFileFetch fileFetch = new SiteFileFetch(bean); 8 fVI33 fileFetch.start(); N1\u~%AT" } UN`-;! catch(Exception e){e.printStackTrace ();} r444s8Y l|%7)2TyG) o83HR[ }
M)Yu^ }z,4IHNn "#rlL^9v public static void main(String[] args) b}9K"GT { U/&?rY^| new TestMethod(); A_{QY&%m } rD%(*|Y"c } Al$"k[-Uin 点击下载更多相关资料
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