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/* `@XehSQ **SiteFileFetch.java }l;Lxb2` */ ~pz FZ7n4 package NetFox; tsv$ r$Se import java.io.*; Lgi[u"Du import java.net.*; _~M^ uW^l kg>>D o@k84+tn( public class SiteFileFetch extends Thread { h{_*oBa 0m)&YFZ[( 4l @)K9F SiteInfoBean siteInfoBean = null; //文件信息Bean f$F*3 long[] nStartPos; //开始位置
'Cc(3 long[] nEndPos; //结束位置 d8OL!Rk FileSplitterFetch[] fileSplitterFetch; //子线程对象 ROdK8*jL long nFileLength; //文件长度 _^\$"nw boolean bFirst = true; //是否第一次取文件 ][7p+IsB boolean bStop = false; //停止标志 XUmR{A File tmpFile; //文件下载的临时信息 v(O=IUa DataOutputStream output; //输出到文件的输出流 `hrQw)5?r cdTsRS;E //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) XsL#;a C public SiteFileFetch(SiteInfoBean bean) throws IOException Vmi{X b]< { ~uj;qq siteInfoBean = bean; ln<]-)&C //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 6rX_-Mm6w tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); s>%Pd7: if(tmpFile.exists ()) jd:B \%#![ { 1RqgMMJL bFirst = false; ax|1b`XUr" read_nPos(); k;Fh4Hv } ZjVWxQ
else L1#Ij# { bx}fj#J]En nStartPos = new long[bean.getNSplitter()]; p#@Z$gTH`' nEndPos = new long[bean.getNSplitter()]; )/|6'L-2 } shgAhx Em^( yL1CZ_ q_t4OrLr= } ?c#$dc" ||eAE) M+xdHBg public void run() `G$1n#& { BfmsMW //获得文件长度 ig_2={Q@ //分割文件 :i*JnlvZ //实例FileSplitterFetch XDz5b., //启动FileSplitterFetch线程 ry0%a[[ //等待子线程返回 EKZVF`L try{ A6"Hk0Hf if(bFirst) }Je>;{&% { :}q\tNY< nFileLength = getFileSize(); \a|L/9% if(nFileLength == -1) 1HR~G9 { ,k0r System.err.println("File Length is not known!"); K@:m/Z}|4 } HY}j!X else if(nFileLength == -2) ${hz e<g {
p{Sh F. System.err.println("File is not access!"); ?mYYt]R } " I+p else ofdZ1F { GWP dv for(int i=0;i<nStartPos.length;i++) p>*i$ { -1r2 K nStartPos = (long)(i*(nFileLength/nStartPos.length)); +K$NAT } [QczlwmO for(int i=0;i<nEndPos.length-1;i++) *"{&FEV { x?yD=Mq_ nEndPos = nStartPos[i+1]; acW'$@y9?N } G^Tk 20* nEndPos[nEndPos.length-1] = nFileLength; C"w
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//启动子线程 }5 9U}@xC fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; lmCZ8 j(FF for(int i=0;i<nStartPos.length;i++) NgZUnh3{ { /Cr/RG:OX fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), b.yh8|& siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 0GXO&rCG nStartPos,nEndPos,i); q6q1\YB Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Y)I8eU{Wl( fileSplitterFetch.start(); KeBQH8A1N } *nTU#U // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 8im@4A+n` siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); /VTM 9)u // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", y'M#z_.z nEndPos = " + nFileLength); B]iP't\~ // fileSplitterFetch[nPos.length-1].start(); 0E/:|k _|{aC1Y!V !?FK We //等待子线程结束 1s7^uA$}6 //int count = 0; 2k
-+^}r //是否结束while循环 C !x/
^gw boolean breakWhile = false;
>'=MH2; %{5n1w HgRwiIt while(!bStop) gn1(4
o { l=P'B
@, write_nPos(); eC`pnE Utility.sleep(500); ljJ>;g+ breakWhile = true; z3?\:Yz `NNf&y)y 6f%DpJ:$U for(int i=0;i<nStartPos.length;i++) RMXzU { yJJ4~j){l if(!fileSplitterFetch.bDownOver) EeQ5vqU { yJ2B3i@T4 breakWhile = false; JBX[bx52<r break; dZ(|uC!? } 4dh+ } Ca>& if(breakWhile) )NW6?Pu" break; ]<w:V`( 5\4g>5PD =hH.zrI6e //count++; 5z/Er".P //if(count>4) )mN9(Ob! // siteStop(); 2XSHZ|; } e$/B_o7( u\e\'\ zA+@FR? System.err.println("文件下载结束!"); !]?$f= } P\R27Jd catch(Exception e){e.printStackTrace ();} tpf7_YP_!- } +C{p%`< A}VYb:u/ 8HErE<_( //获得文件长度 Qo0H public long getFileSize() r0dDHj~F { lX!`zy{3k int nFileLength = -1; 6j9)/ HP try{ c+' =hR[ URL url = new URL(siteInfoBean.getSSiteURL()); &*,:1=p HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); c|~6Ie httpConnection.setRequestProperty("User-Agent","NetFox"); e 9$C#D>D %Z]'!X
j2n,f7hl. int responseCode=httpConnection.getResponseCode(); udqS'g& if(responseCode>=400) Q=cQLf;/' { 'ktHPn
,K processErrorCode(responseCode); C;B}3g& return -2; //-2 represent access is error Xa9TS" } d+L#t (jWss V1 Cpl;vQ String sHeader; ]`=X'fED ]Uc`J8p, S 01wwZ for(int i=1;;i++) N=1JhjVk" { tykB.2f //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 5i So8*9} //Utility.log(in.readLine()); (Ye>Cp+] sHeader=httpConnection.getHeaderFieldKey(i); jx`QB')kX if(sHeader!=null) 3K0tC= { `iShJz96 if(sHeader.equals("Content-Length")) JC;^--0(z { u' Qd, nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Xh+ia#K break; hZ\+FOx; } 8nNsrat } C'mL& else H}0dd" break; u=+q$Q] } c9Es%@] } ,d,\-x-+/ catch(IOException e){e.printStackTrace ();} ]gb= catch(Exception e){e.printStackTrace ();} B0UJq./` HL{$ ^l#v wdE?SD s Utility.log(nFileLength); %'Xk)-+y &~DTZgY Z'v-F^ return nFileLength; T6#"8qz< } 'W. Vr4 Z0,~V d.<~&.-$ //保存下载信息(文件指针位置) k)(Biz398E private void write_nPos() Y;J *4k] { ?:rx1}:F try{ h rN% output = new DataOutputStream(new FileOutputStream(tmpFile)); o@E/r.uK output.writeInt(nStartPos.length); -7-['fX for(int i=0;i<nStartPos.length;i++) )|#%Czd4 { _sHK*&W{CT // output.writeLong(nPos); dWRrG-' output.writeLong(fileSplitterFetch.nStartPos); Zf*r2t1&P output.writeLong(fileSplitterFetch.nEndPos); ZFh+x@ } %i{;r35M;9 output.close(); *e"a0 } cd@.zg'sYn catch(IOException e){e.printStackTrace ();} 8%{q%+ catch(Exception e){e.printStackTrace ();} !UBO_X%dz } V1=*z dx_6X!=.J Bo_ym36N //读取保存的下载信息(文件指针位置) j0-McLc private void read_nPos() {OMgd3%14 { D #2yIec try{ zri}
h/{ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); /M0/-pV9 int nCount = input.readInt(); B\`Aojw"E? nStartPos = new long[nCount]; 7hNb/O004 nEndPos = new long[nCount]; /L=(^k=a.; for(int i=0;i<nStartPos.length;i++) "
BTE { F
8yF nStartPos = input.readLong(); %oykcf,# nEndPos = input.readLong(); }E<^gAh} } L wJ0 input.close(); ENh8kD
l5 } Ps[$.h catch(IOException e){e.printStackTrace ();} eH>#6R1- catch(Exception e){e.printStackTrace ();} "AueLl) } c$E)P$<j *e.*=$ ;]D(33)( private void processErrorCode(int nErrorCode) H6kf
K5, { D}mL7d1 System.err.println("Error Code : " + nErrorCode);
&wH:aD } QOFvsJ<s H:&?ha,9 G&{HTYP //停止文件下载 | FM
} public void siteStop() %B2XznZ: { P!g-X%ngo bStop = true; X~T/qFS for(int i=0;i<nStartPos.length;i++) C"<s/h fileSplitterFetch.splitterStop(); TvhJVVQ+? N0TeqOi4Y Ibr%d2yS= } 8Cf|*C+_' } "l~Ci7& !a //负责部分文件的抓取 3 pWM~(#>- **FileSplitterFetch.java OmMX$YID */ #XIc
"L)c package NetFox; g$37;d3Tx ".2K9j7$ mNmUUj9z import java.io.*; R'K/t|MC import java.net.*; lP<I|O=z
Se^^E.Z,W >wON\N0V_ public class FileSplitterFetch extends Thread { bi[7!VQf <>&=n+i I+?hG6NM String sURL; //File URL rs8\)\z long nStartPos; //File Snippet Start Position B&KL2&Z~Pq long nEndPos; //File Snippet End Position {ShgJ;! Q int nThreadID; //Thread's ID mB 55PYA boolean bDownOver = false; //Downing is over Un=a
fX?j boolean bStop = false; //Stop identical +Ghi}v FileAccessI fileAccessI = null; //File Access interface 7!V@/S}7 d.F)9h]XHO /I{R23o public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException E)p9eU[# { sa-9$},z4 this.sURL = sURL; }6m?d!m this.nStartPos = nStart; m\0cE1fir this.nEndPos = nEnd; mw$Y nThreadID = id; .J.vC1 4gi fileAccessI = new FileAccessI(sName,nStartPos);//定位 b[^{)$( } x"B'zP Utl
t< loOOmHhJ& public void run() P_4DGW { Lubrn"128 while(nStartPos < nEndPos && !bStop) cnNOZ$) { v"lf-c
4iX-( ir, je%M AgW` try{ P~7.sM URL url = new URL(sURL); H[&@}v,L HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >IvBUM[Rt httpConnection.setRequestProperty("User-Agent","NetFox"); 'imU`zeo String sProperty = "bytes="+nStartPos+"-"; p]|LV)R n httpConnection.setRequestProperty("RANGE",sProperty); *o?i:LE] Utility.log(sProperty); Fz"ff4Bx [ f05d ; #gZ|T
M/h InputStream input = httpConnection.getInputStream(); ~9M!)\~ //logResponseHead(httpConnection); ;IP~Tb]& D!3{gV# v548ysE) byte[] b = new byte[1024]; 5G*II_j int nRead;
P'[<AZ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) m#@_8_ M { hl/itSl$ nStartPos += fileAccessI.write(b,0,nRead); a|qsQ'1,; //if(nThreadID == 1) MK$Jj" // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); q? z> } <4X?EYaTq =:7$/T'Qg Ob@Hng%v Utility.log("Thread " + nThreadID + " is over!");
nB@UKX bDownOver = true; @z,*K_AKr //nPos = fileAccessI.write (b,0,nRead); KFhG ( } wyQb5n2`;~ catch(Exception e){e.printStackTrace ();} V'wi ^gq } K&`Awv } ohZx03 x7ATI[b[ NPU^)B //打印回应的头信息 S7sb7c'4 k public void logResponseHead(HttpURLConnection con) \9m*(_Qf { ?Myh7 for(int i=1;;i++) O.\h'3C { 7sV/_3H+ String header=con.getHeaderFieldKey(i); 3oBC
if(header!=null) (F5ttQPh //responseHeaders.put(header,httpConnection.getHeaderField(header)); -F`he=Ev9 Utility.log(header+" : "+con.getHeaderField(header)); MOZu.NmO else otriif@+Z break; zB)%lb } s (PY/{8 } >;lKLGJrd> \Ow,CUd ~<O,Vs_C/ public void splitterStop() 0D3OE.$0 { tbur$00 bStop = true; {*xBm# } ejcwg*i 3 wt (2txM"Dja } PZOORjF8A ~"7J}[i5 fPQ|e"? /* VXC4% **FileAccess.java %$n02"@ *//文件访问(定位,写) \qq-smcM- package NetFox; Q1V2pP+=@ import java.io.*; /~hbOs/
L 2VYvO=KA h}6_ybmZ public class FileAccessI implements Serializable{ [m#NfA:h, xs1bxJ_R //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 kK?zVH-! RandomAccessFile oSavedFile; Bw-s6MS long nPos; V5s&hZZYa dU+0dZdKO [x_s/"Md; public FileAccessI() throws IOException l9Pu&M?5 { $9H[3OZPVv this("",0); jT^!J+?6K+ } 0xP:9rm fN[n>%)VO< {j@+h%sF>+ public FileAccessI(String sName,long nPos) throws IOException -Enbcz(B { I~RcOiL) oSavedFile = new RandomAccessFile(sName,"rw"); Phlk1*1n this.nPos = nPos; \(u@F<s- oSavedFile.seek(nPos); (j N]OE^ } Wem?{kx0 3+ asP&n {3 o%d: public synchronized int write(byte[] b,int nStart,int nLen) /0\QL+^! { HD00J]y_ int n = -1; 4*8&[b try{ dq1TRFu oSavedFile.write(b,nStart,nLen); j+0.=#{?? n = nLen; U.Hdbmix } fI}c 71b` catch(IOException e) %!wq:~B1 { &;U|7l~vl e.printStackTrace (); gz\j('~-D } K+> V|zKuk B1,?{Ur 3 2y[ return n; M,G8*HI" } `,-STIh) x!+Z{ x }200g_^ } #M:B3C!ouY m5qCq9Y /j
%_t /* d+1x*`U| **SiteInfoBean.java gvr]]}h:O */ c}cG<F package NetFox; %&1$~m0 E7LbSZ hg&u0AQ2 public class SiteInfoBean { hXnw..0" gix>DHq$k _UIgRkl. private String sSiteURL; //Site's URL +gNX7xuY private String sFilePath; //Saved File's Path )|:8zDuJ private String sFileName; //Saved File's Name J~'~[,K private int nSplitter; //Count of Splited Downloading File ](n69XX_ !ABLd|tP k!vHO public SiteInfoBean() X&,N}9>B {//nSplitter的缺省值为5 >vxWx[fRu //default value of nSplitter is 5 )BpIxWd? this("","","",5); vVdxi9yk } _KxX&THaj ku-cn2M/ {[lx!QF 8& public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) V^WQ6G1 { R05T5Q1]A sSiteURL= sURL; 6Ok,_
! sFilePath = sPath; 9JXhHAxD sFileName = sName; `>y[wa>9r this.nSplitter = nSpiltter; 8(uw0~GO K)N)IZ1q Sy:K:Z|[U } 9<w=),R`8 `U!(cDY G\uU- z$) public String getSSiteURL() W
n6,U=$3 { IY~
{)X return sSiteURL; 5@iy3olP } Sn0Xl3yr
sB8p(
L %'kX"}N/ public void setSSiteURL(String value) epYj+T { +O,V6XRr sSiteURL = value; Ho>p ^p } QdirE4W p>!1S (\tq<h0 public String getSFilePath() FfjC
M7? { WEps.]s return sFilePath; }il%AAI9}r } cS5w +`,L ^`/V i C\J@fpH(t` public void setSFilePath(String value) Y'?Iznb { EJv! tyJ\[ sFilePath = value; 5#P: "U } ]m RF[b$ }@3$)L%n_u :^K~t!@ public String getSFileName() %odw+PhO { xL|?(pQ/BK return sFileName; Mi<*6j0 } i4 P$wlO $`ON!,oa B>R*
f C@g public void setSFileName(String value) 20n%o&kG]8 { oUCS| sFileName = value; sek6+#|= } HH+TjX/b Qb@BV&^y& d"z *Nb public int getNSplitter() B6-AIPb { |WQD=J%~( return nSplitter; Ni&,g } So0`c,D _Wq7U1v` }'%$7vL`Ft public void setNSplitter(int nCount) kg zwlKK { CzK%x?~] nSplitter = nCount; #@IQlqJfY7 } 4GEjW4E } jBT*~DyN
z w6%l8+{R wHq('+{=&
/* r#ks>s **Utility.java #d3[uF]OmW */ AX/=}G package NetFox; &mCs%l \?aOExG
I hg(KNvl public class Utility { 3L%Y"4(mm D
"JMSL4r ;]|m((15G public Utility() BASO$?jf4 { N)`tI0/W 44z=m MR< VG? yL2y } A)= X?x }Ox2olUX //线程睡眠 Z`e$~n(Bh public static void sleep(int nSecond) AEBw#v!,o { *9\oD~2Y try{ #1gTpb+t Thread.sleep(nSecond); 9?EY.}~ } LPtx|Sx![ catch(Exception e) +# m { F[Qs v54 e.printStackTrace (); C6Um6X9/i } {6REfY
c } @`#OC# P1M|f4* //日志 +:j4G^ V public static void log(String sMsg) GA({r i { 0b!fWS?,k0 System.err.println(sMsg); \Qe'?LRu{ } x'VeL| $u/8Rp W+fkWq7`Xx public static void log(int sMsg) zW|$x<M^ { LA( f]Xmc System.err.println(sMsg); XyN`BDFi } _p3WE9T } cx,u2~43A& ,i1 fv
" 9 ayH:; /* O% j,:t'" **TestMethod.java }[YcilU_ */ Cf8R2(-4 package NetFox; lk5_s@V
l $\=6."R5< w+:+r/!g public class TestMethod { F!DrZd>\ YB(#]H|8S L>|A6S#y8/ public TestMethod() fh/)di { ///xx/weblogic60b2_win.exe wFH(.E0@Q try{ XmE_ F SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); nJnO/~| //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 5cv,
>{~5 SiteFileFetch fileFetch = new SiteFileFetch(bean); r)*_,Fo| fileFetch.start(); zXA= se0U } n~L'icD[ catch(Exception e){e.printStackTrace ();} [xH2n\7 IWSEssP av$\@4I } 2g`uC} @=^jpSnZ vCrWA-q# public static void main(String[] args) QQ2OZy>W { #EwRb<'Em new TestMethod(); @idp8J [td } O>{t}6o } 8DmX4* 点击下载更多相关资料
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