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/* f4]N0 **SiteFileFetch.java 9R9__w; */ D(y+1^> package NetFox; )y9 ;OA import java.io.*; Y/.AUN
Z import java.net.*; NH7`5mF$ A/q2g7My aWyUu/g<A` public class SiteFileFetch extends Thread { $4Z+F#mx di~]HUZh) K)\(wxv SiteInfoBean siteInfoBean = null; //文件信息Bean s|Z:}W?{ long[] nStartPos; //开始位置 `W@T'T" long[] nEndPos; //结束位置 )PR3s1S^ FileSplitterFetch[] fileSplitterFetch; //子线程对象 9n1ZVP.ag long nFileLength; //文件长度 "(s6aqO$ boolean bFirst = true; //是否第一次取文件 K&=D-50% boolean bStop = false; //停止标志 kOw=c Gt File tmpFile; //文件下载的临时信息 ^_v[QV DataOutputStream output; //输出到文件的输出流 AY#wVy t)YUPDQ@J //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) <fN;
xIB public SiteFileFetch(SiteInfoBean bean) throws IOException *)u?~r(F { 5L8&/EN9- siteInfoBean = bean; ^:`oP"%-T //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ~12_D'8D[ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); "`pNH' if(tmpFile.exists ()) S]}}A { tAF]2VV(e bFirst = false; \tY"BC4. read_nPos(); i+g~ Uj}h } ,V,f2W 4 else $@_{p*q { 93j{.0]X nStartPos = new long[bean.getNSplitter()]; M\Se_ nEndPos = new long[bean.getNSplitter()]; I%oRvg|q } eP "`,< XAe\s` MDJc[am (8.{+8o } j~bAbOX12
iOX Z]Xj5 i[\w%(83Fi public void run() r'/\HWNP { Hkdf $$\ //获得文件长度 B`fH^N //分割文件
2nv[1@M //实例FileSplitterFetch 5F2_xH$5 //启动FileSplitterFetch线程 *ZaaO^! //等待子线程返回 GcT;e5D try{ SxJ$b if(bFirst) l3. { iv*V#J> nFileLength = getFileSize(); .}q]`<]ze if(nFileLength == -1) ;f:gX`"\ { ^i+[m System.err.println("File Length is not known!"); }Z\wH*s` } K UKACUL else if(nFileLength == -2) En(7(qP6} { B{C_hy-fw System.err.println("File is not access!"); ^T:gb]i'Qa } ?]c+j1i else 8V9[a*9 { \q "N/$5{f for(int i=0;i<nStartPos.length;i++) ef=K_,
_ { <:&de8bT nStartPos = (long)(i*(nFileLength/nStartPos.length)); >{C\H.N } t6+YXjXK for(int i=0;i<nEndPos.length-1;i++) B:<
]Hl$ { y`yZR
_ nEndPos = nStartPos[i+1]; kbYeV_OwM } Bq@zaMv nEndPos[nEndPos.length-1] = nFileLength; iib } LvcuZZ`1a } P ZxFZvE ]ab#q= XM/vDdR //启动子线程 Tkw;pb fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; LH2PTW\b!6 for(int i=0;i<nStartPos.length;i++) }u%"$[I} { sYqgXE. fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), y500Xs[c siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), i0:>Nk nStartPos,nEndPos,i); :]PM_V| Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); KVkMU?6 fileSplitterFetch.start(); $d/&k` } (&[[46 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), + H_MV=A^ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); )55\4<ty // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 2#vv$YD nEndPos = " + nFileLength); =wG+Ao // fileSplitterFetch[nPos.length-1].start(); <P_ea/5:| ~=En+J}* S|em[D[Y^ //等待子线程结束 /*$hx @ih //int count = 0; fuUm}N7 //是否结束while循环 @*>Sw>oet boolean breakWhile = false; C$d>_r t{dSX?<nt AQss4[\Dx while(!bStop) }fZ`IOf { h5"Ov,K3[ write_nPos(); ibpzeuUl Utility.sleep(500); Pf<[|yu4? breakWhile = true; oH#v6{y
Pm+tQ kM/Te{< for(int i=0;i<nStartPos.length;i++) }7s>B24J { HfB@vw^ if(!fileSplitterFetch.bDownOver) HN6}R|IH { El-
? % breakWhile = false; e5?PkFV^a1 break; a.@qGsIH } ~Rpm-^ } ~+G#n"P n if(breakWhile) WC,+Cn e break;
?wb+L X^@I]. 17|np2~ //count++; pI.+"Hz //if(count>4) =IU*}># // siteStop(); \.uc06 } e`K)_>^n# Zg~nlO2 ]m4OIst System.err.println("文件下载结束!"); 1L nyWZ } dRi5hC$ catch(Exception e){e.printStackTrace ();} B@y(. } <7_KeOLJ ::5E 8919 !#2=\LUC //获得文件长度 ?GA&f2]a public long getFileSize() L<V3KS2y { +7V{ABfGl int nFileLength = -1; zYY$D. try{ *sw7niw URL url = new URL(siteInfoBean.getSSiteURL()); O#a6+W"U HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (X[CsaXt httpConnection.setRequestProperty("User-Agent","NetFox"); N K]B? V 9wI\0 N8r*dadDd int responseCode=httpConnection.getResponseCode(); \x{;U#B[3> if(responseCode>=400) l_rn++ { Z8#Gwyinx processErrorCode(responseCode); S8d8%R~1=h return -2; //-2 represent access is error 5kypMHJm } nmU_N:Y Lw1EWN6}_& .|qK+Hnc String sHeader; A3N]8?D P>ceeoYQuA H*^\h?s for(int i=1;;i++) H(
jXI { 4mjgt<` //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Y-mK+12 //Utility.log(in.readLine()); LhXUm sHeader=httpConnection.getHeaderFieldKey(i); WLa!.v> if(sHeader!=null) H9)m^* { "syh=BC
v if(sHeader.equals("Content-Length")) p?D2)( { <*!i$(gn nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); U9y|>P\)T break; JA)?p{j } tR0pH8?e" } V
r(J+1@ else ?~"bR% break; GNf 482 } fWc|gq } ;22l"-F catch(IOException e){e.printStackTrace ();} CT9 catch(Exception e){e.printStackTrace ();} s=6}%%q6 `;|5 }v9\F-0>Q Utility.log(nFileLength); T<3BT {GDmVWG0q aprm0:Q^ return nFileLength; FWue;pw3 } \!vN Zv11uH-C ml0.$z //保存下载信息(文件指针位置) n79QJl/ private void write_nPos() Hs?e0Z=N { w=]Ks'C] try{ Pg9hW output = new DataOutputStream(new FileOutputStream(tmpFile)); pLa[}= output.writeInt(nStartPos.length); 7cAXd#sI for(int i=0;i<nStartPos.length;i++) fDE%R={!n5 { ]5~s"fnG // output.writeLong(nPos); e^4 p% output.writeLong(fileSplitterFetch.nStartPos); =S '%`] f? output.writeLong(fileSplitterFetch.nEndPos); <IW#ME } iovfo2!hD output.close(); Uz cx6sw } 2%*MW"Q catch(IOException e){e.printStackTrace ();} ] Z8Vj7~ catch(Exception e){e.printStackTrace ();} E$9Ys } t?o,RN: c_aZ{S 5D M"0 //读取保存的下载信息(文件指针位置) -9RDr\&`( private void read_nPos() g%F"l2M { g(VNy@ try{ RLlU"
sw+{ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 1im^17X int nCount = input.readInt(); Go,N>HN nStartPos = new long[nCount]; y;mj^/SxK nEndPos = new long[nCount]; 5@*'2rO&!
for(int i=0;i<nStartPos.length;i++) ]E =Iu { K{n{KB&_& nStartPos = input.readLong(); %r&-gWTQ, nEndPos = input.readLong(); p!]6ll^ } gtUUsQ%y . input.close(); J=.`wZQkS } n JPyM/p catch(IOException e){e.printStackTrace ();} b:qY gg catch(Exception e){e.printStackTrace ();} dKl^jsd } S'oGt&Z<
h:lt<y Ii7QJ:^ private void processErrorCode(int nErrorCode) QwhRNnE= { 0]D0{6x8 System.err.println("Error Code : " + nErrorCode); VMoSLFp^R } BpX6aAx #:T-hRu hhoEb(BA //停止文件下载 VqL.iZ- public void siteStop() 6}FO[ { .>z][2oz bStop = true; ng:Q1Q9N for(int i=0;i<nStartPos.length;i++) lL]y~u fileSplitterFetch.splitterStop(); + [Hh,I7 d #jK=:eK .z13 =yv } iH^z:%dP } =^
T\Xs;GK //负责部分文件的抓取 rJ KZ)N{ **FileSplitterFetch.java (E]!Z vE */ p4p@^@<>X package NetFox; 0Z{j>=$ nx0K$Ptq /b|0PMX import java.io.*; 8w({\= import java.net.*; }w4QP+ x +a^F\8H L@JOGCYy public class FileSplitterFetch extends Thread { |W<+U 0ZQ' _g|% d
GP*O String sURL; //File URL `K,1K long nStartPos; //File Snippet Start Position YJ(*wByM long nEndPos; //File Snippet End Position 9W5onn int nThreadID; //Thread's ID 'l,V*5L boolean bDownOver = false; //Downing is over u{["50~ boolean bStop = false; //Stop identical Q]p(u\* FileAccessI fileAccessI = null; //File Access interface y\{%\ $ d\|!Hg, C*nB public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException v9T_& { Z4IgBn(Z_} this.sURL = sURL; HYmn:?H this.nStartPos = nStart; :kfp_o+J this.nEndPos = nEnd; pKi& [ nThreadID = id; (rg;IXAq% fileAccessI = new FileAccessI(sName,nStartPos);//定位 i1RiGS } vX ] Gf4, %c[ V !Ra*)b" public void run() %u;~kP|S% { _ 84ut while(nStartPos < nEndPos && !bStop) U4G`ZKv(! { ,-z9 #t ? R>h ` Is+O try{ ;NRF=d> URL url = new URL(sURL); c&L"N!4z HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ao/ jt< httpConnection.setRequestProperty("User-Agent","NetFox"); *}8t{ F@k String sProperty = "bytes="+nStartPos+"-"; T9s2bC.z55 httpConnection.setRequestProperty("RANGE",sProperty); c_elShK8# Utility.log(sProperty); 8zMu7,E |hr]>P1 m>SErxU(z InputStream input = httpConnection.getInputStream(); *YlV-C<}W" //logResponseHead(httpConnection); V%Sy"IG ^i:B+
rl V <bd;m byte[] b = new byte[1024]; dXnl'pFS int nRead; R i^[i}
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) v%ioj0, { ~/*MY nStartPos += fileAccessI.write(b,0,nRead); a+Ac[> //if(nThreadID == 1) Y/7 $1k // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4Fm90O } ZI=v.wa *E{2J:` %RDI!e<e} Utility.log("Thread " + nThreadID + " is over!"); 5<w g8y bDownOver = true; ?Ae ven //nPos = fileAccessI.write (b,0,nRead); HbW0wuI } >KJ+-QuO& catch(Exception e){e.printStackTrace ();} \<g*8?yFs } M|Rb&6O } .?l\g-;= >;[*!<pfK5 ^`G}gWBx}w //打印回应的头信息 4t)/ public void logResponseHead(HttpURLConnection con) f!JS= N?3 { KVJ_E!i for(int i=1;;i++) QqU!Najf { AA7C$;Z15~ String header=con.getHeaderFieldKey(i); S9#)A-> if(header!=null) )6aAB| //responseHeaders.put(header,httpConnection.getHeaderField(header)); s~Te Utility.log(header+" : "+con.getHeaderField(header)); zE_i*c"` else 4#lo$# break; mWvl38 } Q@HopiC } JeE;V![ LEtG|3Dx
)KAEt.
public void splitterStop() 9th,VnD0 { qo|WXwP2 bStop = true; .p(T^ m2A* } 9B9(8PVG *I0T{~ y_?Me] } j?+X\PtQ ?[lV- <.? jc% /* q*>&^V $M **FileAccess.java RVQh2'w *//文件访问(定位,写) J_4!2v!6e package NetFox; FIsyiSY<j import java.io.*; kbe-1 <72 {Ja!~N;3 9_5ow public class FileAccessI implements Serializable{ ^RI?ybDd :n-]>Q>5=k //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 s']Bx= RandomAccessFile oSavedFile; $A-J,_:T< long nPos; B]l)++~ y9Us n8 @8I4[TE public FileAccessI() throws IOException uwy:t!(j { <Pi|J-Y this("",0); Ug<#en } LBZ+GB !/]WrGqbS |mw.qI| public FileAccessI(String sName,long nPos) throws IOException =UfsL% { XSyHk"g` oSavedFile = new RandomAccessFile(sName,"rw"); m+T;O/lG0{ this.nPos = nPos; e0,|Wm oSavedFile.seek(nPos); q}?4f*WC } ys kO Z'7 %Da1(bBh public synchronized int write(byte[] b,int nStart,int nLen) WL"^>[Vq { TtTj28k7 int n = -1; j=r P:# try{ @pRlxkvV oSavedFile.write(b,nStart,nLen); tu66'z n = nLen; *(T:,PY } /$p6'1P8 catch(IOException e) [UWdW { #;2n;.a e.printStackTrace (); )O@]uY } |}di&y@-JI Rx=>6,)' Su/6Q$0 t return n; LAS'u"c| } 2so! 8b;1FQ' f@|A[>"V } J`].:IOh "ozr+:#\ t^G"f;Ra+ /* cmU1!2.1E **SiteInfoBean.java 1oWED*B */ heC/\@B package NetFox; $m-2HhqZ (Hb:?( 9 %I?).5 public class SiteInfoBean { r
w2arx FW G6uKv 3@$,s~+ 3 private String sSiteURL; //Site's URL VoWNW private String sFilePath; //Saved File's Path jk [1{I/ private String sFileName; //Saved File's Name _n50C"X=&( private int nSplitter; //Count of Splited Downloading File l:,'j@% ?!d&E?9\ E^/t$M|H public SiteInfoBean() 'O_3)x5 {//nSplitter的缺省值为5 !C3MFm{B //default value of nSplitter is 5 B][U4WJ) this("","","",5); #(N+((): } D"2&P^- BMG3|N^ xg;+<iW public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) YSic-6z0Ms { lJ}_G>GJ sSiteURL= sURL; q=Sgk>NA sFilePath = sPath; %Q
fO8P sFileName = sName;
e]$}-i@# this.nSplitter = nSpiltter; 1Vrh4g.l y[)> yq y ?R$F)g7< } qzKdQ&vO 2db3I:;E vZaZc}AyL public String getSSiteURL() U4C 9<h& { 2a`o
&S return sSiteURL; L\xk:j1[ } Ez
fN&8E KyYM fC gM
u"2I5 public void setSSiteURL(String value) t!W(_8j { CUBEW~X}M sSiteURL = value; zuJ@E=7 } KWowN; e478U$ /'l{E public String getSFilePath() `(ue63AZ { ~obqG!2m return sFilePath; "$+Jnc!! } lm-dW'7& P3x= 8_# [B#R94 public void setSFilePath(String value) 'MUv5Th { 4ew"
%Cs* sFilePath = value; N~goI#4 } (_mnB W bnq;)>& ' g= public String getSFileName() cdl&9-} { Zw5Ni Xj return sFileName; bpJ(XN}E } ;g5m0l5
-:Da&V t{^*6XOcJ public void setSFileName(String value) Z'`gJ&6n { Xqg@ e:g sFileName = value; Ce9|=Jx! } "GMBjT8 P;=n9hgHI f33 2J public int getNSplitter() SPX$U5& { |:q=T
~x return nSplitter; 7~^GA.92 } I7 |Pi[e )t0$qd ] ZkRx1S"m public void setNSplitter(int nCount) rzhWw-GY { J%v=yBC2 nSplitter = nCount; +%T\`6 }
Ch&a/S} } U\4g#!qj ww\CQ6/h [842&5Pd? /* VRWAm>u **Utility.java fHE<( */ a
oD`=I*< package NetFox; z1PBMSG -LK
B$ TyD4|| % public class Utility { !"HO]3-o (6?9B lH~ q>_/u" public Utility() .zA^)qgL { twL3\
}N/B <k eVrCR 2h|MXI\g } b#uL?f @|
M|+k3 //线程睡眠 @Lpq~ 1eZB public static void sleep(int nSecond) \\PjKAsh { $UMFNjL
try{ [w>$QR Thread.sleep(nSecond); s:>VaGC } ~("5yG catch(Exception e) 1->dMm}G[ { jqWu e.printStackTrace (); \f]k CB } <C1H36p } C]O(T2l{l RkH W
//日志 oX#Q<2z* public static void log(String sMsg) `slL%j^" { Y l4^AR& System.err.println(sMsg); M>wYD\oeg } D"Bl:W'?j zvYq@Mhr yh Yb'GK public static void log(int sMsg) s>B5l2Q4 { j`JMeCG=Ee System.err.println(sMsg); )IP,;< } iZ#!O*> } ]{)a,c NG aGrIQq/k)% 9=vMgW /* WKts[Z **TestMethod.java A_XY'z 1 */ mC4zactv package NetFox; e}D3d=6` S@jQX K,Ef9c/+K public class TestMethod { :8L8q<U <6EeD5{* :By?O"LQ public TestMethod() L6t+zIUc-~ { ///xx/weblogic60b2_win.exe Vi>,kF.fV try{ y~Bh SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 8;d:-Cp //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); W3]_m8,Z SiteFileFetch fileFetch = new SiteFileFetch(bean); 8qk?E6 fileFetch.start(); .GsV>H } 6bomh2 catch(Exception e){e.printStackTrace ();} X@$f$= j2Cks_$: 8|):`u } > A Khf )_+rU|We <>dT64R| public static void main(String[] args) .R)D3NZp { j|4<i9^} new TestMethod(); m4TE5q% 3 } R}G4rO-J } e bm])~ZL 点击下载更多相关资料
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