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/* }=."X8zOI8 **SiteFileFetch.java s=|&NlO$ */ 7wc{.~+ package NetFox; Bcy$"F|r import java.io.*;
gIXc-=Ut import java.net.*; qS+I lg S1n'r}z8 Y~bGgd]T public class SiteFileFetch extends Thread { Y3wL EG%,: rO{"jJ
x?Oc<CQ-2 SiteInfoBean siteInfoBean = null; //文件信息Bean (G6N@>V(` long[] nStartPos; //开始位置 TMQu'<?V long[] nEndPos; //结束位置 O/R>&8R$ FileSplitterFetch[] fileSplitterFetch; //子线程对象 y0XI?Wr long nFileLength; //文件长度 ]^\+B4 boolean bFirst = true; //是否第一次取文件 $JXQn boolean bStop = false; //停止标志 \it<]BN File tmpFile; //文件下载的临时信息 ,o j\=2 DataOutputStream output; //输出到文件的输出流 u~d&<_Z @AdJu-u //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) /waZ9 public SiteFileFetch(SiteInfoBean bean) throws IOException [?`c> { :`P;(h siteInfoBean = bean; tlFc+3 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); }tT*Ch?u tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); pBu~($%d if(tmpFile.exists ()) l+V5dZ8W { "ae55ft// bFirst = false; Jid :$T> read_nPos(); 5{|\h} } $pGk%8l% else wen6" { { n%U2LVL nStartPos = new long[bean.getNSplitter()]; $yb8..+ nEndPos = new long[bean.getNSplitter()]; Q-N.23\1 } JZ=a 3)x" H{T)?J~ dfq5P!' YR`Mi.,Sfm } \
o&i63u !kfnqe?| [}_ar public void run() 7e"(]NC84 { uNY]%[AnJ //获得文件长度 ]H[FZY //分割文件 w65
$ R //实例FileSplitterFetch 4[&6yHJ^ //启动FileSplitterFetch线程 ",rA //等待子线程返回 u$[T8UqF try{ ),6Z1 K1 if(bFirst) c$'UfW { *WgP+"h nFileLength = getFileSize(); {:enoV" if(nFileLength == -1) 6A/|XwfE/v { 6dmTv9e System.err.println("File Length is not known!"); Z@8amT;Y } c~|/,FZU' else if(nFileLength == -2) hK$-R1O { &[KFCn System.err.println("File is not access!"); -}juj;IVv } `"CF/X^ else uS|Zkuk[! { {UYqRfgbZ for(int i=0;i<nStartPos.length;i++) uyG4zV\h* { $P@P}%2 nStartPos = (long)(i*(nFileLength/nStartPos.length)); e"|9%AW@< } J:mOg95< for(int i=0;i<nEndPos.length-1;i++) %/MK$ { 3)g1e=\i$ nEndPos = nStartPos[i+1]; X6<HNLgra } %3VwCuE nEndPos[nEndPos.length-1] = nFileLength; [*>@hx } xt"/e-h} } ^j=_=Km] }wkBa] 5>w>J //启动子线程 _L!"3 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; D\V}Eo';6 for(int i=0;i<nStartPos.length;i++) 73.o{V { >8tE`2[i* fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &:jE+l siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), nw5#/5xw nStartPos,nEndPos,i); oaBfq8,; Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); I"JT3[*s fileSplitterFetch.start(); ESASsRzk } $@&bK2@.( // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,_lwT}*w siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); @3S2Xb{ra1 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", "ej>1{3Y:= nEndPos = " + nFileLength); I(
y
Wct // fileSplitterFetch[nPos.length-1].start(); l1wxs@]( Il;'s sq)Nn&5A //等待子线程结束 sX_ ^H%fd //int count = 0; t8)Fkx#8} //是否结束while循环 {fN_itn boolean breakWhile = false; >v<}$v6D~ #t(?8!F a*IJ)'S while(!bStop) "a"[B' { ld@f:Zali write_nPos(); 7\/O"Ot Utility.sleep(500); *,-YWx4 breakWhile = true; P7y[9|^ !s)$_tG 329xo03-[ for(int i=0;i<nStartPos.length;i++) :6M0`V;L { [7s5Vt| if(!fileSplitterFetch.bDownOver) mifYk>J^9 { .D>lv_kp breakWhile = false; r2H'r
,N break; Vi? Z`G]w! } y=j[v},4 } eO9nn9lql if(breakWhile) <s7{6n') break; .$OInh B6pz1P?e} Uq+
_#{2( //count++; P`%ppkzV6 //if(count>4) p4AXQuOP // siteStop(); ;_SS3q } :<v$vER,& !KlSw,&=.6 0$_imjZ System.err.println("文件下载结束!"); [qI* ] } &+^
# `nq catch(Exception e){e.printStackTrace ();} f:Ja } eS=k 48'U ?^!dLW 0l6djN //获得文件长度 R`?^%1^N public long getFileSize() SWGa%6| { v}Nx*% int nFileLength = -1; ;'
W5|.ZN try{ mT>p:G URL url = new URL(siteInfoBean.getSSiteURL()); a?MtY
EK2 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^MW%&&,BL httpConnection.setRequestProperty("User-Agent","NetFox"); ri;M7rg`.{ BT1'@qF -U $pW(~ int responseCode=httpConnection.getResponseCode(); |G@)B!> if(responseCode>=400) _Kj. { IjRmpVcwN processErrorCode(responseCode); 16Y~5JAc return -2; //-2 represent access is error q{ 1U } zLqp@\sT 614/wI8( Ft rw3OxN String sHeader; FlG^'UD 2ML6Lkk )It4al^\ for(int i=1;;i++) sZB6zTX
J { `6$b1qv, //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); jq)|7_N
//Utility.log(in.readLine()); Umt ia~x=& sHeader=httpConnection.getHeaderFieldKey(i); wIj2 IAD if(sHeader!=null) 7uxPkZbb { l,L=VDEz, if(sHeader.equals("Content-Length")) Av>j+O ; { {:X];A$ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); PcHFj+: break; Lp)8SmN } 26VdRy{[ } f4T0Y["QA else U3K<@r break; r(T/^< } "BfmX0&? } X/Rx]}[ catch(IOException e){e.printStackTrace ();} l_-n&(N2<[ catch(Exception e){e.printStackTrace ();} 'f7
*RSKqb Pq>[q?>? xBfe8lor Utility.log(nFileLength); }a1Sfl@`3 G?d,$NMo| ]U1,NhZu return nFileLength; cu`J2vm3 } `A _8nW) Zt2@?w; GR[>mkW!M //保存下载信息(文件指针位置) ~yH>Ko9F} private void write_nPos() ?EQ^n3U$ { kz;_f try{ ![]I%'s output = new DataOutputStream(new FileOutputStream(tmpFile)); Q_0x6]/! output.writeInt(nStartPos.length); :+Q"MIU for(int i=0;i<nStartPos.length;i++) <N=p:e,aN, { }R&5qpl // output.writeLong(nPos); d74g|`/ output.writeLong(fileSplitterFetch.nStartPos); &:CjUaP@ output.writeLong(fileSplitterFetch.nEndPos); 71" JL", } wV[V#KpX8- output.close(); _RL-6jw#o } 1uS-Tx catch(IOException e){e.printStackTrace ();} *Z]WaDw catch(Exception e){e.printStackTrace ();} )uid!d } 51M^yG&M l \^nC2 V}|v!h[O8 //读取保存的下载信息(文件指针位置) ]AA%J@ private void read_nPos() 3[=`uO0\7 { fEw=I7{Y try{ ,#bb8+z&p DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); '#N5i int nCount = input.readInt(); <@e+-$ nStartPos = new long[nCount]; 6Z7pztk nEndPos = new long[nCount]; xeHb89GnoQ for(int i=0;i<nStartPos.length;i++) lgonR { N8XC~Dh{ nStartPos = input.readLong(); j:e^7|. nEndPos = input.readLong(); `N,Vs n" } 5{ FM#@ input.close(); Ybt_?Q9#] } ?ng14e catch(IOException e){e.printStackTrace ();} 9vp%6[ catch(Exception e){e.printStackTrace ();} PNJe&q0* } f>8B'%] ;>Ca(Y2M /iUUM
t' private void processErrorCode(int nErrorCode) \POnsM)+l { \|~?x#aA System.err.println("Error Code : " + nErrorCode); ^b"bRQqm } 1O9p YW5J q qe2,X? nQ642i%RQ //停止文件下载 !)%>AH' public void siteStop() =F'M~3M { f#v#)Gp+ bStop = true; 98A(jsj for(int i=0;i<nStartPos.length;i++) Dr6s^}}~n fileSplitterFetch.splitterStop(); g8,?S6\nMz =a9etF%B M20Bc, VI } z9M.e. } i-k >U}[% //负责部分文件的抓取 t$K@%yU2 **FileSplitterFetch.java If-,c^i */ Ns2,hQFc package NetFox; 3ximNQ}S 9k\)tWe x7.QL?qR. import java.io.*; Hwp{< import java.net.*; JY2/YDJ }Kj Ju; n5v' public class FileSplitterFetch extends Thread { lMC{SfdH 0iJ!K;A2% _~;&)cn,0 String sURL; //File URL NfTCpA long nStartPos; //File Snippet Start Position hj&fQ}X long nEndPos; //File Snippet End Position 5iQmZ[ int nThreadID; //Thread's ID zLsb`)! boolean bDownOver = false; //Downing is over Ufdl|smt1 boolean bStop = false; //Stop identical X>Al:?`}N FileAccessI fileAccessI = null; //File Access interface <&5m N yuHZ&e 2mqK3-c public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException KdT[*- { DH:GI1Yu>I this.sURL = sURL; GIm
" )}W this.nStartPos = nStart; 1~2R^#rm this.nEndPos = nEnd; jg
[H} nThreadID = id; sdJ%S*)5G$ fileAccessI = new FileAccessI(sName,nStartPos);//定位 22`oFXb' } dGW{l]N OXHvT/L` C$<"w, public void run() VEj$^bpp5s { uf)W-Er6~ while(nStartPos < nEndPos && !bStop) J7BFk
?= { NunV8atn: :n'yQ#[rn |h&<_9 try{ "l@A[@R URL url = new URL(sURL); qoj^_s6 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /!3ZW XY\ httpConnection.setRequestProperty("User-Agent","NetFox"); D|d4:;7 String sProperty = "bytes="+nStartPos+"-"; B< |VeU httpConnection.setRequestProperty("RANGE",sProperty); mC i[Ps Utility.log(sProperty); .u1X+P7 Y[Q@WdE9 _1^8xFe2 InputStream input = httpConnection.getInputStream(); $. %L //logResponseHead(httpConnection); LY]nl3{E ^rv"o:lF z %x7fe byte[] b = new byte[1024]; &<,SV^wag int nRead; l~bKBz while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Jyj0Gco { 6HoqEku/Q nStartPos += fileAccessI.write(b,0,nRead); [X,A'Q //if(nThreadID == 1) AR%hf // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /+VIw`E } CjZZm^O ?Z q_9T7 w*50ZS;N Utility.log("Thread " + nThreadID + " is over!"); AL$W +') bDownOver = true; bGv*-;* //nPos = fileAccessI.write (b,0,nRead); L#D9@V'z } ZJ;LD* catch(Exception e){e.printStackTrace ();} =/FF1jQ } gH %y } w
|_GV}#_ o+nG3kRD xXX/]x> //打印回应的头信息 A\K,_&x1Z public void logResponseHead(HttpURLConnection con) )^4hQ3BS { `Da+75 f6v for(int i=1;;i++) ^[k0k(_ { \PpXL*. String header=con.getHeaderFieldKey(i); 7K&}C;+ if(header!=null) OL3UgepF //responseHeaders.put(header,httpConnection.getHeaderField(header)); #G_F`& Utility.log(header+" : "+con.getHeaderField(header)); F|9+ +) else !z"Nv1!~| break; ?"6Ov ] } ) Qq'Wp3i } W>B^S Ekv89swl`i 17}$=#SX public void splitterStop() V/PAi.GZ
{ Py|;kF~! [ bStop = true; dpwD8Q<
U } !@G)$g=< }j46L1T c<wavvfUo } -Ep!- a A\z`c
e! {.st`n|xz /* u$%A#L[ **FileAccess.java k[\a)WcY8 *//文件访问(定位,写) ["y6b*;x package NetFox; ju|]Qlek import java.io.*; c%z'xM qI%&ay"/ 2*[QZ9U[@ public class FileAccessI implements Serializable{ 0,_b) 03=5Nof1 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 cWMUj K/N RandomAccessFile oSavedFile; VWx]1\ long nPos; 48O~Jx, |7"$ w%2 2N5`' public FileAccessI() throws IOException 4zjs!AK% { @MiH(.Dq this("",0); k?*KnfVh! } {u"8[@@./ $TG=w j.m(ltGh public FileAccessI(String sName,long nPos) throws IOException *27*>W1 { uo2'"@[e oSavedFile = new RandomAccessFile(sName,"rw"); AiP!hw/V$ this.nPos = nPos; =2Cj,[$ oSavedFile.seek(nPos); *$,:m } >Lft9e \]uV!)V5B Kcy@$uF{2 public synchronized int write(byte[] b,int nStart,int nLen) `JB?c { PLX>-7@ int n = -1; %eg+F try{ jQ\zG J3 oSavedFile.write(b,nStart,nLen); ]p7jhd= n = nLen; %<0eA`F4 } e}hmS 1>H catch(IOException e) Jrxz'9qRG { oD9^ID+ e.printStackTrace (); =LkR!R= } l+*&:Q/ @-HG`c ct n]}W``=7 return n; ?t](a:IX } Fv74bC% 30>3 !Xqa Lfog
{Vzs } F@ Swe c(#;_Ve2P 4_A0rveP /* A@hppaP! **SiteInfoBean.java U8.7>ENnP& */ _>+8og/%@ package NetFox; R:X0'zeRr `h:34RC; ":a\z(*t public class SiteInfoBean { U*3J+Y YNwp/Y Fz#X=gmG private String sSiteURL; //Site's URL bKg8rK u private String sFilePath; //Saved File's Path 2i;7{7 private String sFileName; //Saved File's Name :cB=SYcC% private int nSplitter; //Count of Splited Downloading File oVFnlA ;oZ)Wt R;,g1m|] public SiteInfoBean() >/[GTqi {//nSplitter的缺省值为5 ApBWuXp|u //default value of nSplitter is 5 F8-?dp f' this("","","",5); -Eu6U`"( } 2c6g>? #Cpd9| @+3kb.P%7 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) .p0Clr! { 1 zw*/dp sSiteURL= sURL; *(C(tPhC sFilePath = sPath; HK`I\,K sFileName = sName; ZKHG !`X0 this.nSplitter = nSpiltter; J'$>Gk] @)o^uU T fU=B4V4@ } Mmpfto%i /xtq_*I1S I:K"'R^ public String getSSiteURL() PB;eHy { 3k#~yaoI return sSiteURL; ]vwW]O7 } Pj}66. Cj~'Lhmv'T }=c85f~i public void setSSiteURL(String value) AbZKYF
P { /|*
Y2ETOr sSiteURL = value; .L'.c/ s } ;>n,:355L AGLscf. [w%
qV 6 public String getSFilePath() M#(+c_(r { *G*
k6.9W! return sFilePath; 8Z(Mvq]f& } :q#Xq;Wp :Nofp& phM>.y_ public void setSFilePath(String value) !pD*p)`s { BD(Z5+EU1 sFilePath = value; L4!{h| } B95B|tU>. /!c${W!sY j4qJ.i public String getSFileName() RzWXKBI\E] { 0#nPbe,Lj return sFileName; YW7b)uYf } oYukLr [VE8V- /`mks1:pK public void setSFileName(String value) <J^MCqp!v { %i5M77#Z sFileName = value; \otWd } 4^M gLOEh6 30SW\@ public int getNSplitter() Ytl4kaYS { yU9DSY\m{ return nSplitter; G K7![p } ?#fu.YE\ E{|W(z,
Y'8?.a]' public void setNSplitter(int nCount) "1%5, { EM[WK+9>I{ nSplitter = nCount; DQr Y*nH } RJd(~1 } 3.*8)NW ))"6ern [n:<8ho /* }hhGu\ **Utility.java !O<)\)|g */ "g1)f"pL package NetFox; k7T`bYv neLAEHV oM>Z;QVRC: public class Utility { G|!on<l& ?.Ca|H< s+<Yg$) public Utility() i%0ur}p { EwvoQ$#jv g\&g N K1M%!JKh)x } TA4!$7b$ 2Eu`u!jhx //线程睡眠 uC(V public static void sleep(int nSecond) wY[+ZT { NU5.o$
try{ OG>}M$Ora Thread.sleep(nSecond); ,,q10iF } toBHkiuD catch(Exception e) &7K?w~ { cWe"%I e.printStackTrace (); KV0]m^@x } v@
lM3_rbO } *^VRGfpb YwjKAyLU //日志 J^Wa8Q;9lX public static void log(String sMsg) ^f4s"T { hYG6 pTCb System.err.println(sMsg); kY-N>E: } Z/Dx,zIR ;'#8tGv= <^5Z:n!q public static void log(int sMsg) t*1fLumXR { 7`DBS^O]dG System.err.println(sMsg); $#9;)8J } %[ Z \S0C } e?8FN. q $Avjnm pL/DZ|S3 /* *V8<:OG|e **TestMethod.java 7o#I,d~ */ E/|To package NetFox;
2y;Skp N_W}*2( 8c9*\S public class TestMethod { _x(o*v[Pt __G?0*3 G &m)6J'q3k public TestMethod() pZqq]mHK { ///xx/weblogic60b2_win.exe R6;=n"Ueb try{ >4TaP*_ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); r\'A
i6 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ) l:[^$=, SiteFileFetch fileFetch = new SiteFileFetch(bean); iJ1"at fileFetch.start(); g| I6'K!< } O;:mCt _H catch(Exception e){e.printStackTrace ();} (MxQ+D\ MOQ*]fV: v$?+MNks } |
*2w5iR "n(hfz0y% $P/~rZ@M@ public static void main(String[] args) Vc\MV0lr { rWa2pO new TestMethod(); !Qu"BF } &=] ~0$ } XDOY`N^L 点击下载更多相关资料
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