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/* {gkY:$xnrG **SiteFileFetch.java yh'P17N|q */ ` 0z8J*T] package NetFox; d7U%Q8?wUR import java.io.*; jqJ't)N import java.net.*; u$MXO].Q 4\pUA4 Tw]].|^f- public class SiteFileFetch extends Thread { B]lM69Hz {Y6;/".DM nX>HRdC SiteInfoBean siteInfoBean = null; //文件信息Bean u]$e@Vw. long[] nStartPos; //开始位置
!\hUjM+(} long[] nEndPos; //结束位置 bMvHAtp FileSplitterFetch[] fileSplitterFetch; //子线程对象 j96\({;k long nFileLength; //文件长度 ,?KN;~t#vz boolean bFirst = true; //是否第一次取文件 +>BD^[^^ boolean bStop = false; //停止标志 MRb6O!$`C File tmpFile; //文件下载的临时信息 h3YWqSj DataOutputStream output; //输出到文件的输出流 ?H0"*8C?Y 4COo ~d //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) hVl^vw7o public SiteFileFetch(SiteInfoBean bean) throws IOException tYzpL { 2l.qINyz siteInfoBean = bean; IPa)+ ZQ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ;%YAiW8{Xk tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); (DTXc2)c if(tmpFile.exists ()) z <jH{AU { lWRRB&8 bFirst = false; F4|U\,g read_nPos(); U^~jB= =] } N_Q\+x}zq else ]N4?*S*jd) { JIh:IR(ta nStartPos = new long[bean.getNSplitter()]; RbN# dI' nEndPos = new long[bean.getNSplitter()]; 9J(jbJ7p } Pq<]`9/w^w )ePQN~#K} Wu|ANc 6b7SA, } KwxO%/-}S AD0pmD cd3;uB4\, public void run() ZGgM-O1 { L; (J6p]h //获得文件长度 uk<JV*R= //分割文件 _I<LB0kgf. //实例FileSplitterFetch Ef"M e( //启动FileSplitterFetch线程 /s|4aro //等待子线程返回 +)U>mm, try{ --BS/L- if(bFirst) tjWf`#tH>H { 4cQ|"sOzD nFileLength = getFileSize(); rI;84=v2&9 if(nFileLength == -1) fKkH
[ { d'UCPg<Y System.err.println("File Length is not known!"); -d8U Hc } 2r*Yd(e else if(nFileLength == -2) fb;y*-?# { K)_DaTmi) System.err.println("File is not access!");
6Sr}I,DG } cwC-)#R'] else 1J?x2 { 89+Q^79m for(int i=0;i<nStartPos.length;i++) &
G8tb>q<V {
#Ks2a):8 nStartPos = (long)(i*(nFileLength/nStartPos.length)); =1e>$E# } 4PDxmH]y for(int i=0;i<nEndPos.length-1;i++) -j"]1JLQ { r{
}&* Y nEndPos = nStartPos[i+1]; %DIZgPd\ } jFPD SR5 nEndPos[nEndPos.length-1] = nFileLength; "inXHxqu/J } :+Okv$v4 } k:sFI @g (N/KP+J$n 2nkUvb%= //启动子线程 #*)X+* fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; :}{,u6\ for(int i=0;i<nStartPos.length;i++) @q<F_'7is { m|%ly fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), l/ :23\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Ow f:Kife nStartPos,nEndPos,i); $5v:z Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); rc ()Eo50 fileSplitterFetch.start(); IuN:*P } 0.kQqy~5 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), _YPu siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); KoF_G[m // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", HCOE'24I nEndPos = " + nFileLength); ^f_4w|u,+ // fileSplitterFetch[nPos.length-1].start(); }Gi4`Es p&Ev"xhs jTE~^ //等待子线程结束 alz2F.%Y //int count = 0; 4pG!m&4]ze //是否结束while循环 n"dYN3dE boolean breakWhile = false; H=1Jq 5A`T}~"X V^/]h
u while(!bStop) h&O8e;S# { 2/4,iu(T`c write_nPos(); { 2\.
Utility.sleep(500); `;BpdG(m breakWhile = true; MzX4/*ba lN,)T%[0- MB:*WA& for(int i=0;i<nStartPos.length;i++) +u|p<z { SZ3UR if(!fileSplitterFetch.bDownOver) wbA<G&h~ { d@#wK~I breakWhile = false; /\e&nYz break; f'Cx% } `S+B-I0 } @teNT" if(breakWhile) G.y~*5?# break; .!Qo+( +#=l{_Z,ZJ 4 /Q4sE~< //count++; ed:[^#Lj //if(count>4) nQ}$jOU& // siteStop(); rUOl+p_47 } *CS2ndp Y}UVC|Ef vpL3XYs` System.err.println("文件下载结束!"); #V#sg}IhM? } _DAj$$ Ru4 catch(Exception e){e.printStackTrace ();} -FrNk> } s?pd&_kOv3 KV { J>J1 l0G sY.~, //获得文件长度 :$5$H public long getFileSize() =&YhA}l\O { .sE5QRVc int nFileLength = -1; Q( g&/O try{ m\xlSNW'q URL url = new URL(siteInfoBean.getSSiteURL()); s6+`cC4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ?@LqrKj11 httpConnection.setRequestProperty("User-Agent","NetFox"); \2huDNW&
! X^c2 (>usa|| int responseCode=httpConnection.getResponseCode(); ^j>w<ljzz if(responseCode>=400) TeXt'G=M { /lqVMlz\77 processErrorCode(responseCode); n,vs(ZL: return -2; //-2 represent access is error Exu>% } uFl19 b<1+q{0r IyJHKDFk String sHeader; nlsif )ZqY`by! gtVnn]Jh for(int i=1;;i++) 6tKCY(#oO+ { >jH%n(TcC //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); h-+GS% //Utility.log(in.readLine()); ?Ja&LNI9S sHeader=httpConnection.getHeaderFieldKey(i); E
Zh.*u@^r if(sHeader!=null) #BLmT-cl { 75?z" i if(sHeader.equals("Content-Length")) G}8Zkz@+ { ~P;KO40K nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); hiBZZ+^[ break; Rt=zqfJ }
roNRbA] } }?KfL$@$ else ]sL)[o break; K#_x.:<J } ecIZ+G)k } & Y Y^Bd# catch(IOException e){e.printStackTrace ();} !wNj;ST* catch(Exception e){e.printStackTrace ();} 'wm :Xa M`u&-6 op5G}QZ Utility.log(nFileLength); Tc.k0n%W:b BK;Gh0mp U?.cbB, return nFileLength; Oll,;{<O } TP R$oO2 f:hsE wR]jJbF //保存下载信息(文件指针位置) ?CU6RC n private void write_nPos() Ww)p&don { o +KDK{MD try{ pB0p?D)n output = new DataOutputStream(new FileOutputStream(tmpFile)); O~~WP*N output.writeInt(nStartPos.length); RF$2p4=[ for(int i=0;i<nStartPos.length;i++) |X6/Y@N { .,+TpPkc // output.writeLong(nPos); %!X9>i> output.writeLong(fileSplitterFetch.nStartPos); [3|&!:4g6 output.writeLong(fileSplitterFetch.nEndPos); rO3.%B} } |0N6]%r output.close(); MFzJ 8^.1R } b;k3B7< catch(IOException e){e.printStackTrace ();} }fT5(+ Wo catch(Exception e){e.printStackTrace ();} :plN<8 } 4Fs5@@>X RM|2PG1m l>){cI/D# //读取保存的下载信息(文件指针位置) {Uj-x
- private void read_nPos() :XFr"aSt { p()#+Xy try{ lC8Z@wkjO DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 2>+(OL4l int nCount = input.readInt(); `G0GWh)`x nStartPos = new long[nCount]; eg Xbe)ld nEndPos = new long[nCount]; [Zxv&$SQ for(int i=0;i<nStartPos.length;i++) Vl\8*!OL% { ,*MAteD nStartPos = input.readLong(); (<KFA, nEndPos = input.readLong(); w 8BSY } W{W8\ input.close(); 1LZ[i89&% } #X t|"Z catch(IOException e){e.printStackTrace ();} kH'zTO1 catch(Exception e){e.printStackTrace ();} }N,$4h9Dj } +,|aIF Qo$j'|lD )sZJH9[K private void processErrorCode(int nErrorCode) !%X#;{ { :tf'Gw6v System.err.println("Error Code : " + nErrorCode); 6m$lK%P{1 } MP_LdJM1E [L ?^+p> {16]8-pe //停止文件下载 q"9 2][} public void siteStop() &,8F!)[9 { J5Ovj,[EZ bStop = true; Y!qn[,q8 for(int i=0;i<nStartPos.length;i++) r7^oqEp@B fileSplitterFetch.splitterStop(); $H8B%rT] <{P`A%g@ f1w_Cl }
YG_|L[/# } PK).)5sW //负责部分文件的抓取 d+o.J",E **FileSplitterFetch.java C2} f' */ 4H4ui&|7u6 package NetFox; 7z;X@+O}s E! GH$%:; J~.` import java.io.*; v8l3{qq import java.net.*; =JNCQu LE}V{%)xD h<<uef9 public class FileSplitterFetch extends Thread { '4ip~>3?w .L@gq/x) #1De#uZ String sURL; //File URL 1Eh6ti long nStartPos; //File Snippet Start Position Y?v{V>;*A long nEndPos; //File Snippet End Position 8AQ__&nT int nThreadID; //Thread's ID wQ9?Z.-$ boolean bDownOver = false; //Downing is over Ji)Ys
ebV boolean bStop = false; //Stop identical c> 0R_ FileAccessI fileAccessI = null; //File Access interface 363KU@` ZA+w7S3 ^). public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 0fzHEL { =1Hn<Xay0 this.sURL = sURL; p?2^JJpUb this.nStartPos = nStart; R8-=N+hX this.nEndPos = nEnd; ?[<#>,W nThreadID = id; ]?%S0DO* fileAccessI = new FileAccessI(sName,nStartPos);//定位 g{^~g } ,GF]+nI89 b4&l=^:e= XR_Gsb%l public void run() E?-
~*T { tj4/x7! while(nStartPos < nEndPos && !bStop) 3O*^[$vM { Ozg,6&3ji C2{*m{
D fSVb.MZa7 try{ _9C,N2a{C URL url = new URL(sURL); m+Kl
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (YM2Cv{4 httpConnection.setRequestProperty("User-Agent","NetFox"); s}F.D^^G String sProperty = "bytes="+nStartPos+"-"; 1ixBwnp? httpConnection.setRequestProperty("RANGE",sProperty); }qT{" *SC Utility.log(sProperty); MY}/h@ A{p_I< I(H9-!& InputStream input = httpConnection.getInputStream(); Cto>~pV //logResponseHead(httpConnection); c] - +ib&6IU (q@%eor&} byte[] b = new byte[1024]; h
S)lQl:^ int nRead; 2]]}Xvx4# while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) h~lps?.#b { -AN5LE9- nStartPos += fileAccessI.write(b,0,nRead); GkpYf~\Q //if(nThreadID == 1) SQ&}18Z~ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); D"gv:RojD } C8W_f( i~ xXlx}C `S+n,,l Utility.log("Thread " + nThreadID + " is over!"); U(gYx@ bDownOver = true; (mplo|> //nPos = fileAccessI.write (b,0,nRead); ~O~iP8T } EW`3$J; catch(Exception e){e.printStackTrace ();} }
m"':f } .k$Yleg } 6l:uQz9 cJf&R^[T )t((x //打印回应的头信息 l9e=dV:pH public void logResponseHead(HttpURLConnection con) 9k\M<jA { *cZ7? for(int i=1;;i++) osc A\r { fZoQQ[s String header=con.getHeaderFieldKey(i); :k-@w5( if(header!=null) g/(BV7V //responseHeaders.put(header,httpConnection.getHeaderField(header)); *eGG6$I Utility.log(header+" : "+con.getHeaderField(header)); Zv2]X- else "~S2XcR[ E break; 0{
_6le] } 'P*OzZ4>$ } A'$>~Ev znDpg{U( Jd~M q9( public void splitterStop() jGoQXiX { \x:} | bStop = true; H_,4N_hL } m&yHtnt F"cZ$TL] 3xN_z?Rg } !1%Sf.`!_ I5)$M{#a B"
_Xst /* '14 86q@[$ **FileAccess.java v,Zoy|Lu *//文件访问(定位,写) [kTckZv package NetFox; nch#DE82 import java.io.*; F|cli
< 1:Ff#Eq,s c>3j$D+ public class FileAccessI implements Serializable{ (>,b5g Ls+vWfF=# //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 zK I1 RandomAccessFile oSavedFile; n1aOpz6` long nPos; dd6%3L{cn \%B7M]P tt
CC]
Q public FileAccessI() throws IOException r&ys?@+G { VoQhzp6& this("",0); {6%-/$LX } scTt53v^ kGL3*x 'MW O3 public FileAccessI(String sName,long nPos) throws IOException |tU wlc> { rxs:)# ?A oSavedFile = new RandomAccessFile(sName,"rw"); 2R
^6L@fw this.nPos = nPos; _0ZU I^# oSavedFile.seek(nPos); k)[c!\a[i } R<vbhB/lU GHo
mk##0E u/NcX public synchronized int write(byte[] b,int nStart,int nLen) I-=Ieq"R9 { _k;HhLj` int n = -1; 2G<XA try{ Sn^M[}we oSavedFile.write(b,nStart,nLen); t BG
9Mn n = nLen; ;JMmr-@ } cnRgzj<ek catch(IOException e) bvHQ #:}H { bR1Q77<G\ e.printStackTrace (); 7F_N{avr } kZ]pV=\Y* ur7S
K(# (Q&O'ng1 return n; @6%7X7m } }$sTnea Ck>]+rl KfYT } v T
@25 W`P>vK@= :."6 g)T /* B#}EYY **SiteInfoBean.java mxu !$wx */ uHRxV"@}[1 package NetFox; "c?31$6 xn@oNKD0 g>#}(u!PH public class SiteInfoBean {
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+uc;[` th<>%e}5c Oqt{ uTI~ private String sSiteURL; //Site's URL T\ukJ25! private String sFilePath; //Saved File's Path +JM@ kdE5b private String sFileName; //Saved File's Name f*IvaY private int nSplitter; //Count of Splited Downloading File _ysakn !qHB?] yjq|8.L[
G public SiteInfoBean() 0LSJQ9\p {//nSplitter的缺省值为5 D #7q3s //default value of nSplitter is 5 P2 qC[1hYH this("","","",5); *cCj*Zr] } kY6_n4 'cAS>s"$}V ykH@kv Qt public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 9'e<{mlM {
=zDvZ(5 sSiteURL= sURL; ):nC%0V sFilePath = sPath; (_+ux1h6^ sFileName = sName; [d-Y1 this.nSplitter = nSpiltter; R=$}uDFmW $9xp@8b\_ e.#,9 } (d*||" a;nYR5f WS?Y8~+{5 public String getSSiteURL() ?AQA>D#W { ts("(zI1E return sSiteURL; \PFj w9s } ,H<nNBv3M 9 g- 8u+& 1'iQlnMO@ public void setSSiteURL(String value) g6S-vSX, { }RY Pr sSiteURL = value; -}( o+!nl } DRTT3;,N "3|OB, <;: -j:yE Z4Oy public String getSFilePath() GU 9p'E { .2_xTt return sFilePath; m(EVC}Y } &p*rEs L/%{,7l<^? -^;,m=4{3 public void setSFilePath(String value) l Ft&cy2 { tp }Bz&V sFilePath = value; wlslG^^(! } F g'{K%t4 ,^ dpn \"
m&WFm public String getSFileName() Nez '1 { x{GFCy7 return sFileName; so| U&`G } <X5ge>. 0]$-}AYM 0>e]i[P. public void setSFileName(String value) %nE%^Enw { <]|!quY<* sFileName = value; yX%> %#$ } 8<KC-|y. Ol>/^3a= /F''4%S?E public int getNSplitter() C@-cLk { ^ P
A|RFP return nSplitter; hstGe>f[6 } r>PKl'IbE FFmXT/K"/j 'YYT1H) public void setNSplitter(int nCount) N pQOLX/<? { {0AlQ6.@> nSplitter = nCount; d>c`hQ(V } [a}Idi`
K } 8YgRJQZ! 78<fbN5}r oz[G'[\}F /* ;TwqZw[. **Utility.java i.eMrzJ| */ O'.{6H;t package NetFox; S&k/Pc oYJ<.Yxeb cf*~Gx_l public class Utility { JS<w43/j f.E{s*z> qzLD public Utility() xgM\6e { QA)"3g
zzh7 "M3Qn ]gF=I5jn] } D5].^*AbZ ~XvMiWuo //线程睡眠 "-AFWWKtx public static void sleep(int nSecond) 1|>bG#| { f9IqcCSW try{ Gc5mR9pV Thread.sleep(nSecond); g?Rq .py]! } MU:v& sk catch(Exception e) hgwS_L { /Bk`3~]E> e.printStackTrace (); EQM[!g^a } 98uMD } w_LkS/ #G?",,&dM //日志 _G/uDP% public static void log(String sMsg) +@7c:CAy( { !ZCxi
System.err.println(sMsg); bX5/xf$q } /len8FRf beV+3HqB8 DiZv sc public static void log(int sMsg) #!_ViG )2^ { ="Azg8W System.err.println(sMsg); <A`SC;k\u } km`";gUp> } Pi,86? iuM ,aF rsw=a_S /* x8wsx
F **TestMethod.java w^7[4u4 */ X76rme package NetFox; _6]CT0 -&) ,ZO?D|M1 public class TestMethod { XB:E<I'q!3 4s"x}c">F ' 8Q}pp` public TestMethod() NpbZt;%t { ///xx/weblogic60b2_win.exe fl4'dv try{ =vDDfPR SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Z]5xy_La //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); #H5+8W SiteFileFetch fileFetch = new SiteFileFetch(bean); aqQ
U7 fileFetch.start(); 8k.#4}fP } 3-[+g}kak? catch(Exception e){e.printStackTrace ();} 1&Mpx!K*T 58`Dcx,yJ %/_E8GE
} +vV?[e 0[8uuqV[cB <u?\%iJ" public static void main(String[] args) 6\y?+H1 { 'I>geW?{QK new TestMethod(); OL@$RTh } {"rL3Lk } [8 23w.{]# 点击下载更多相关资料
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