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/* 1{^CfamF **SiteFileFetch.java $h,d?
.u6w */ iwUv`>l& package NetFox; <BSSa`N` import java.io.*; aZ$/<|y~:_ import java.net.*; FIH@2zA WPIZi[hBs M3ZOk<O<R public class SiteFileFetch extends Thread { Q\H_t)- v' C@jsxM JlUb0{8PE SiteInfoBean siteInfoBean = null; //文件信息Bean vyE{WkZxR long[] nStartPos; //开始位置 5\WUoSgy long[] nEndPos; //结束位置 D>P;Izb FileSplitterFetch[] fileSplitterFetch; //子线程对象 0}B?sNr long nFileLength; //文件长度 Q.yb4 boolean bFirst = true; //是否第一次取文件 *\D}eBd| boolean bStop = false; //停止标志 &1P(O\d File tmpFile; //文件下载的临时信息 F"I*-!o DataOutputStream output; //输出到文件的输出流 y>`5Kyj3-@ byafb+x //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) kL|\wci public SiteFileFetch(SiteInfoBean bean) throws IOException rR\;G2p) { ]a M-p@ siteInfoBean = bean; ((qGh>* //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); vTdUuj3N tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 8yn4}`Nc@ if(tmpFile.exists ()) K!p,x;YX { 0*/kGvw`i bFirst = false; +,z)# read_nPos(); $%=G[/i' } /
$_M@> else JRXRi*@ { Apmw6cc nStartPos = new long[bean.getNSplitter()]; K U$`!h nEndPos = new long[bean.getNSplitter()]; /HZv } RpYcD n&$/Q$d& Bhe{L?}0 fH[Wkif } G{+2xN
a( FNC[59 1eHe~p , public void run() i3P9sdTD { 6|5H=*)DH //获得文件长度 `^x9(i/NE //分割文件 H'Nq#K //实例FileSplitterFetch Jld\8= //启动FileSplitterFetch线程 BKay*!'PX //等待子线程返回 ~ltg try{ `]jqQr97 if(bFirst) \%TyrY+`K { \^0 !|
nFileLength = getFileSize(); J1X~vQAe if(nFileLength == -1) *1$ { P_&p=${ System.err.println("File Length is not known!"); nM8[ } *GJ:+U&m[ else if(nFileLength == -2) e\D|
o?v { U7h(-dV
System.err.println("File is not access!"); a ~opE!|m } w^Ag]HZN else &<Zdyf?[Ou { 8eN7VT eb for(int i=0;i<nStartPos.length;i++) \x(^]/@ { hO
\/ nStartPos = (long)(i*(nFileLength/nStartPos.length)); s1bU } hO3{ for(int i=0;i<nEndPos.length-1;i++) /OG zt { R&*@@F-dx nEndPos = nStartPos[i+1]; {n&Uf{ } dxCPV6 XI nEndPos[nEndPos.length-1] = nFileLength; H O*YBL }
DkdL#sV } 'mE^5K 35_)3R) s6n`?,vw //启动子线程 APq7 f8t fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; @^&7$#jq% for(int i=0;i<nStartPos.length;i++) mlB~V3M'G { nxfoWy fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~8{sA5y siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), KP{3iUqvO nStartPos,nEndPos,i); y3JMbl[S0 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); s$ z2 c fileSplitterFetch.start(); T<yb#ak } KmmQ ,e% // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 2khh4?|\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ~KPv7WfG // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 4-^[%&>} nEndPos = " + nFileLength); 0[Eb .2I // fileSplitterFetch[nPos.length-1].start(); )+EN$*H |>+uw|LtZ |##GIIv;i //等待子线程结束 t,HFz6 //int count = 0; .Y\EE;8% //是否结束while循环 Ee)xnY%( boolean breakWhile = false;
^2C>L} jn=:G+0 Ilq=wPD}j while(!bStop) =wrP:wYF { RB$
z]/= write_nPos(); :c=.D;, Utility.sleep(500); cbYK5fj"T breakWhile = true; (s&&>M]r_ Wekqn!h
#^0( for(int i=0;i<nStartPos.length;i++) i=#F)AD^5# { !OAvD# if(!fileSplitterFetch.bDownOver) %u!b& 5]e {
+TSSi em breakWhile = false; v* ~3Z1 break; suVmg-d } HID([Wk } NBOCt)C;H if(breakWhile) r4Q|5kT*i break; kO_5|6 ;gB`YNL tJU-<{8 //count++; q-_' W, //if(count>4) Z
a(|(M H // siteStop(); 3CZS) } 6gU{(H
uM S*(L_ sn{tra System.err.println("文件下载结束!"); Mu&x_&| } fk{0d catch(Exception e){e.printStackTrace ();} m4m<nnM } |5MbAqjzC `^6 ,kI-c ~ap2m //获得文件长度 75NRCXh. public long getFileSize()
AK@L32-S { ."6[:MF int nFileLength = -1; <]d
LX}C) try{ E=w3=\JP URL url = new URL(siteInfoBean.getSSiteURL()); nc?B6IV HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); z]@6fM[ httpConnection.setRequestProperty("User-Agent","NetFox"); c$h9/H=~ h"W8N+e\ &JhX+'U int responseCode=httpConnection.getResponseCode(); -t-tn22 if(responseCode>=400) [*4fwk^ { =.Tv)/ea processErrorCode(responseCode); fZ{[]dn[ return -2; //-2 represent access is error |FNCXlgZ } `JURQ:l)3^ N#k61x r{K;|'d%h String sHeader; (f#b7O-Wn =RsXI&&vh L%h/OD for(int i=1;;i++) >I'%!E; { eV};9VJ$F //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); .*5 Z"Q['G //Utility.log(in.readLine()); >)**khuP7 sHeader=httpConnection.getHeaderFieldKey(i); ELD!{bMT if(sHeader!=null) w0J|u'H { \".^K5Pm if(sHeader.equals("Content-Length")) E>uVofhml { ,r^"#C0J} nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 57I}RMT" break; 8P: spD0 } #&8rcu;/ } 7Y( 5]A9= else Ng=ONh
break; \RG!@$i } i$^ZTb^ } k%81f'H catch(IOException e){e.printStackTrace ();} '7)" catch(Exception e){e.printStackTrace ();} mUP. rb6 )"<8K}%! :d,^I@] Utility.log(nFileLength); ajH"Jy3A N#z~ }
cNW^4F return nFileLength; ~Y!kB:D5;~ } +OHGn;C U1R4x!ym4 E6MA?Ax&= //保存下载信息(文件指针位置) 5.0e~zlM- private void write_nPos() SNpi=K!yn { +j/~Af p5f try{ $)Bg JDr output = new DataOutputStream(new FileOutputStream(tmpFile)); H=^K@Ti: output.writeInt(nStartPos.length); <V&5P3)d9 for(int i=0;i<nStartPos.length;i++) 'MxSd( T
= { pPro }@@ // output.writeLong(nPos); 5/0j}_pP output.writeLong(fileSplitterFetch.nStartPos); 1DJekiWf output.writeLong(fileSplitterFetch.nEndPos); NL"G2[e } )A8v];.]3 output.close(); $jzFc!rs } hZ$t$3 catch(IOException e){e.printStackTrace ();} dp5cDF}l catch(Exception e){e.printStackTrace ();} 0 p uY"[c } HIvZQQW| j}J Z
F7}-! //读取保存的下载信息(文件指针位置) _e<o7Y@_ private void read_nPos() T6BFX0$ { A#y@`}]!' try{ n6Z|Q@F DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Y3U9:VB int nCount = input.readInt(); +cu^%CXT nStartPos = new long[nCount]; 2DDsWJ; nEndPos = new long[nCount]; 7(a2L&k^ for(int i=0;i<nStartPos.length;i++) j;~%lg=) { A*yi"{FLi nStartPos = input.readLong(); ;{Ux_JEg nEndPos = input.readLong(); Kq6jw/T } mI1H! input.close(); p*3; hGp6 } Sv[ 5NZn0& catch(IOException e){e.printStackTrace ();} &(pjqV catch(Exception e){e.printStackTrace ();} Lxl_"kG } I:j3sy ~mz%E @mQ:7-,~ private void processErrorCode(int nErrorCode) P ,mN > { Gu0 ,)jy\ System.err.println("Error Code : " + nErrorCode); #
TkR } 3R$Z[D- 'Prxocxq Ri*3ySyb //停止文件下载 2[yBD-": public void siteStop() N:5[,O<m_ { |UUdz_i!: bStop = true; P5<vf for(int i=0;i<nStartPos.length;i++) aoW6U{\ fileSplitterFetch.splitterStop(); <yUstz,Xu^ Q;/a F` L V{Q,DrP } \3YO<E!t } (g!p>m!Z //负责部分文件的抓取 UK[v6".^h **FileSplitterFetch.java GIwh@4; */ ?\=/$Gt package NetFox; `CE^2 J>vMo@ <'U]`Lp import java.io.*; Qx3eLfm import java.net.*; \%jVg\4' ,\)a_@@k +>f<EPGn public class FileSplitterFetch extends Thread { Q9F) W&Y"K)` VyLH"cCv String sURL; //File URL eDKxn8+(H long nStartPos; //File Snippet Start Position [#^#+ |{\ long nEndPos; //File Snippet End Position E>jh"|f:{ int nThreadID; //Thread's ID a}yXC<}$ boolean bDownOver = false; //Downing is over g=@_Z" boolean bStop = false; //Stop identical >pL2*O^{9 FileAccessI fileAccessI = null; //File Access interface q>!L6h5]t i^`9syD V>-b`e public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ~l[ra { uq3{hB# this.sURL = sURL; F"+o@9] this.nStartPos = nStart; m` AK~O2 this.nEndPos = nEnd; D=f7NVc >Q nThreadID = id; {}~: &.D fileAccessI = new FileAccessI(sName,nStartPos);//定位 YvL?j } Y$>-%KcKeI bzpFbfb m!n/U-^ public void run() W~n.Xeu{C { )$GIN/i while(nStartPos < nEndPos && !bStop) 5N$E()m$ { yBpk$ eU+ {*YJg 4vnUN try{ f>j wN@( URL url = new URL(sURL); +|cI:|H> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >TL^>D httpConnection.setRequestProperty("User-Agent","NetFox"); b&)5:&MI String sProperty = "bytes="+nStartPos+"-"; d50Vtm\ httpConnection.setRequestProperty("RANGE",sProperty); XKOUQc4!R Utility.log(sProperty); vT^Sk;E Sb2v_o +xv!$gJEj InputStream input = httpConnection.getInputStream(); z`Wt%tL( //logResponseHead(httpConnection); :fcM:w& c,EBF\r8* \/`? byte[] b = new byte[1024]; =JLh?Wx int nRead; x+5k
<Xi} while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) SUCUP<G { 9Ru;` nStartPos += fileAccessI.write(b,0,nRead); uLeRZSC //if(nThreadID == 1) 5v.DX`" // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <~U4* } gwkb!#A |H}sYp 66&EBX} Utility.log("Thread " + nThreadID + " is over!"); >zvY\{WY bDownOver = true; +]xFoH
//nPos = fileAccessI.write (b,0,nRead); e'*HS7g } e9pOisZ;8 catch(Exception e){e.printStackTrace ();} l*aj#%ha } yGBQ0o7E } jF ^5}5U od<b!4k~s +Lm4kA+aE5 //打印回应的头信息 lU]un&[N public void logResponseHead(HttpURLConnection con) rsNf$v-* { J:dof:q for(int i=1;;i++) 0X|_^"! { GV|9H]_,I String header=con.getHeaderFieldKey(i); shC;hR&; if(header!=null) _;9! //responseHeaders.put(header,httpConnection.getHeaderField(header)); Xt/Ksw"wn Utility.log(header+" : "+con.getHeaderField(header)); 8kL4~(hY else R,2=&+ e break; D>L2o88 } ]
f>]n } \{\MxXW hn)a@ .9G<y 4 public void splitterStop() 4R%*Z~ { .\3`2 bStop = true; 'm=*u
SJK } 8OhDjWVJ 10[Jl5+t yq[Cq=rBk } z2c5m M(q'%XL^ 4EP<tV /* faXx4A2" **FileAccess.java G\gMC
<3 *//文件访问(定位,写) /?-7Fg+, package NetFox; qOV[TP, import java.io.*; CG]Sj*SA~ :,pSWfK H 9%)=`W public class FileAccessI implements Serializable{ |+IZS/W" J'mDU //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 E4.SF|=x RandomAccessFile oSavedFile; Bvjl-$m!v long nPos; F51.N{' C_fY %O V,v[y\ public FileAccessI() throws IOException VObrlOkp { S&jesG-F this("",0); mY!iu(R1 } ?dZt[vAMn 9 t
n!t I3S9Us-\ public FileAccessI(String sName,long nPos) throws IOException ?NNn:t iD { ~3h-j K? oSavedFile = new RandomAccessFile(sName,"rw"); pY8q=Kl this.nPos = nPos; KGHq rc oSavedFile.seek(nPos); `em9T oJV } 0o&MB
Dp =4!nFi "O>n@Q| public synchronized int write(byte[] b,int nStart,int nLen) H&}ipaDO { Ei>m0
~<\ int n = -1; qAkx<u try{ h #Z4pN8T3 oSavedFile.write(b,nStart,nLen); 'rP]Nw n = nLen; @R~5-m } 36m5bYMd) catch(IOException e) { >{B`e`$ { )
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e.printStackTrace (); _>o-UBb4]T } w2(guL($ =TvzS%U 0"k|H& return n; [t]X/O3< } i=FQGWAUu `ejUs]SR y?
(2U6c } Ma-\^S= $.St ej1 eDO!^.<5 /* u<ySd? **SiteInfoBean.java AF\T\mtvRm */ 7XrfuG*L$ package NetFox; cvsz%:Vs z+2V4s = wgeNs9L public class SiteInfoBean { pj|pcv^ vW,snxK6y& l?E a# private String sSiteURL; //Site's URL SJ'
%
^ private String sFilePath; //Saved File's Path 7[v%GoE private String sFileName; //Saved File's Name +m\|e{G private int nSplitter; //Count of Splited Downloading File #:fQ.WWO
Fnx`Ri J<j&;:IRd public SiteInfoBean() dpZ;l 9 {//nSplitter的缺省值为5 Mc sTe|X //default value of nSplitter is 5 ^S)TO}e this("","","",5); {43yb_B( } <S"~vKD' -#`c5y}P :Gqy>)CxX public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Tn-C>=tR~% { DdV'c@rq+ sSiteURL= sURL; V%
TH7@y sFilePath = sPath; F-Z%6O,2 sFileName = sName; ?^HfNp9 this.nSplitter = nSpiltter; OIb _K2?YY(#> d4[(8}
x$/ } %6j)=IOts
05\dl 9e!NOl\_;. public String getSSiteURL() f}%D"gz { H!e 3~+) return sSiteURL; RH)EB<PV } -XoP ia2 *2"6fX[ }H:F< z* public void setSSiteURL(String value) tEd.'D8 s { UO`;&e-DB sSiteURL = value; JD>d\z2QC } H2gj=krK gv15t'y9 P'@<:S| public String getSFilePath() W3W'oo { < O*6T%; return sFilePath; E&$_`m; } I&c ~8Dw W~T}@T:EN CLD-mx|? public void setSFilePath(String value) ;Z[]{SQ { 59uwB('|lH sFilePath = value; n]W_e } t5k!W7C \h<BDk* UUo;`rkT public String getSFileName() ]-o"}"3Ef { f},oj4P\ return sFileName; ^he=)rBb? } >M!xiQX _GQz!YA jo+w> public void setSFileName(String value) S&C1 TC { X8eJ4% sFileName = value; A?Q a 4i } 3q[WHwmm W|k0R4K]] ~%u|[$ public int getNSplitter() @xsP5je] { .ujT!{>v/ return nSplitter; yj6@7@l>A } rI$`9d `pZs T
^G[ %wV>0gQTf public void setNSplitter(int nCount) }H4=HDO { (oK^c-x nSplitter = nCount; iyZZ}M } ylf[/='0K } Sgb*tE)T U7mozHS,:9 PHg48Y"Nd /* (<t_Pru **Utility.java 9ILIEm: */ t HD package NetFox; `;,Pb&W~ p_*M:P1Ma4 ~d{.ng 4K public class Utility { f"#m=_Xm ? ]sM8Bd} :R6bq! public Utility() ^_I} x)i*@ { M/D)".; B
(/U3}w- kpwt]]e* } C`rLj5E% e)nimq
{6 //线程睡眠 G |*(8r() public static void sleep(int nSecond) +,+vkpL-% { a^qNJ?R! try{ Y-piL8Xc Thread.sleep(nSecond); Ou>u% } q+SD6qM catch(Exception e) 1PaUI#X"2F { A\rt6/ e.printStackTrace (); <HWS:'1 } a~h:qpgc } bo"%0?3n 5\mTr)\R //日志 1:C:?ZC#c public static void log(String sMsg) n6WY&1ZE~ { 3OyS8` System.err.println(sMsg); LL^q1)o } pi( -A D8{D[fJ; zxb/ public static void log(int sMsg) i[C~5}% { 'PZ|:9FX! System.err.println(sMsg); 9DQ)cy } >$67 7 } >t,M %1
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[ ?)Nj c&G /* djQv[Vc{ **TestMethod.java ]e:/" */ K`}{0@ilCw package NetFox; %Kh4m7 8rZ!ia! CF!Sa 6 public class TestMethod { MmPU7Nl%X _3iHkQr #H [Bb2(j public TestMethod() 72W,FU~OD { ///xx/weblogic60b2_win.exe I7+9~5p try{ `Ycf]2.,$ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); R9We/FhOY //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); QB!~Wh SiteFileFetch fileFetch = new SiteFileFetch(bean); m8Vdb"0 fileFetch.start(); Y&H}xn } dhg~$CVO catch(Exception e){e.printStackTrace ();} #T K~eHi BC>=B@H0 i=a-<A5x } 2'jOP"G #qU-j/Qf gbOpj3 public static void main(String[] args) !{et8F@d| { j*@l"V>~ new TestMethod(); n>3U_yt6b } V!%jf:k } IH48|sa 点击下载更多相关资料
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