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/* y*h1W4:^- **SiteFileFetch.java M5WtGIV */ zL`uiZl package NetFox; `(/saq* import java.io.*; (0#F]""\e import java.net.*; =4<S8Cp X|E+K rw[ {@|)'z public class SiteFileFetch extends Thread { A]Tcj^# ,GkW. vEU An #Hb= SiteInfoBean siteInfoBean = null; //文件信息Bean 4z%#ZIy3 long[] nStartPos; //开始位置 rn:zKTyhw long[] nEndPos; //结束位置 jS3(> FileSplitterFetch[] fileSplitterFetch; //子线程对象 F] ?@X long nFileLength; //文件长度 4UD=Y?zK boolean bFirst = true; //是否第一次取文件 kEhm' boolean bStop = false; //停止标志 ct4 [b| File tmpFile; //文件下载的临时信息 i4zV( DataOutputStream output; //输出到文件的输出流 }?]yxa ~ [~c'|E8Q //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) <o!&Kk 9 public SiteFileFetch(SiteInfoBean bean) throws IOException _b_?9b-)D { .um&6Q=2< siteInfoBean = bean; ^qGA!_ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); X";ZUp tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); E<Dh_K if(tmpFile.exists ()) 6QLQ1k` { BCUt`;q ]B bFirst = false; BBR"HMa4 read_nPos(); &49$hF
g6" } Mp"'?zf else =Y/fF { pq[X)]z| nStartPos = new long[bean.getNSplitter()]; W.`Xm(y nEndPos = new long[bean.getNSplitter()]; Zfy~mv$ } zf3:<CRX5 Va@6=U7c Ft;u\KT .blft,' } /8>0;bX+ =vr Y{5!> R'I_xjC public void run() S2&9#6 { %8bzs?QI //获得文件长度 +an^e' //分割文件 ^{*f3m/ //实例FileSplitterFetch 2Za,4' //启动FileSplitterFetch线程 w;c#drY7S //等待子线程返回 )nNCB=YF! try{ 'ZC}9=_g if(bFirst) B3dA%\' { [.j]V-61 nFileLength = getFileSize(); #PslrA.
E if(nFileLength == -1) ]A]Ft!`6z { n^AP"1l8?0 System.err.println("File Length is not known!"); 7"F|6JP"$c } @q+cmJKv else if(nFileLength == -2) j&dx[4|m:h { vS$oT]-hKE System.err.println("File is not access!"); &{zwM |Q@? } &IRA=nJ else ZUXse1, { s~LZOPN for(int i=0;i<nStartPos.length;i++) *5y
W { n{64g+ nStartPos = (long)(i*(nFileLength/nStartPos.length)); V~T`& } '<%Nw-
for(int i=0;i<nEndPos.length-1;i++) @P_C%}(< { Any Zi' nEndPos = nStartPos[i+1]; ]l=O%Ev } eu}Fd@GO nEndPos[nEndPos.length-1] = nFileLength; B;GxfYj } L19MP } x2C/L =t3vbV N.0HfYf //启动子线程 Ht|",1yr+ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; $N;"}Gz for(int i=0;i<nStartPos.length;i++) >*`>0Q4y { ?dsf@\ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3>Q@r>c siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Km)X_}| nStartPos,nEndPos,i); }XCR+uAz Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); S5~`T7Ra fileSplitterFetch.start(); ,!6M*| } R:w%2Y // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ImWXzg3@{ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); EO#gUv // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Fn86E dFM nEndPos = " + nFileLength); d7"U WY^ // fileSplitterFetch[nPos.length-1].start(); bQwdgc),s{ L$1K7<i. "xvtqi,R //等待子线程结束 _W0OM[ //int count = 0; D=r- //是否结束while循环 50LHF% boolean breakWhile = false; A&<?
k42b:W5% 908ayfVI while(!bStop) e'1 ^+*bU { Y*@|My`
write_nPos(); !8xKf*y Utility.sleep(500); zmf"I[) breakWhile = true; /Hv*K&}M ,b<9?PM
of8mwnZR for(int i=0;i<nStartPos.length;i++) <ROpuY\!l { hZAG (Z if(!fileSplitterFetch.bDownOver) f}[H
`OF { #P(l2 ( breakWhile = false; ~ J0,)_b%* break; >P<z |8 } jg[5UTkcs } P*pbwV#| if(breakWhile) r\(v+cd break; aS,a_b] CI,lkO|C K`hz
t //count++; u_N\iCYp //if(count>4) b.#^sm// // siteStop(); 8rFaW } J?Ck4dQ 6nh]* / EdEoXY-2 System.err.println("文件下载结束!"); Kb-W
tFx } RcgRaQ2^ catch(Exception e){e.printStackTrace ();} ^vpIZjN } n`% 2Mj c su&t7rJ #G3` p!" //获得文件长度 kg<P t > public long getFileSize() bE?'C h { UqN{JG:#. int nFileLength = -1; \V= &&(n# try{ N~;*bvW{ URL url = new URL(siteInfoBean.getSSiteURL()); 6sPk:5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |GtY*| httpConnection.setRequestProperty("User-Agent","NetFox"); /D0RC 8;TAb.r t)9]<pN% int responseCode=httpConnection.getResponseCode(); [s~JceUyX if(responseCode>=400) )ZGYhE { zI:(33) processErrorCode(responseCode); 25d\!3#E return -2; //-2 represent access is error );nz4/V } kI%peb? aD2*.ln>< tM)Iir*U# String sHeader; QU.0Elw OB~C} '^$ P/ci/y_1 for(int i=1;;i++) D?^540,b { wa!zv^;N* //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); P+h6!=nD7 //Utility.log(in.readLine()); ^|#>zCt^ sHeader=httpConnection.getHeaderFieldKey(i); S?L#N if(sHeader!=null) Go 1(@ { eJ)1K if(sHeader.equals("Content-Length")) RU0i#suiz { SBTPTb nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 6B#('gxO break; \eQla8s } vQ 4}WtvA } |zq4* 5 else Bz+.Qa+ break; 2{-!E ^g } Vo,[EVL } Edw2W8 catch(IOException e){e.printStackTrace ();} QBoFpxh= catch(Exception e){e.printStackTrace ();} Pp+~Cir g<$. - g (?\?it- Utility.log(nFileLength); o~#f1$|Xn 0x@A~!MoP p*
RC return nFileLength; icE|.[ } .s2$al G}VDEC o@9+mM"B) //保存下载信息(文件指针位置) w?*z^y@ private void write_nPos() w$j{Hp6m { DzC Df@TB" try{ 6\4Z\82 output = new DataOutputStream(new FileOutputStream(tmpFile)); l&L,7BX output.writeInt(nStartPos.length); RNTa XR+Zn for(int i=0;i<nStartPos.length;i++) rVH6QQF=\ { ~-_i // output.writeLong(nPos); gWOt]D/ output.writeLong(fileSplitterFetch.nStartPos); #{$1z;i?f output.writeLong(fileSplitterFetch.nEndPos); sw$2d } H\E7o"m output.close(); %X>FVlPm } gO='A(Y catch(IOException e){e.printStackTrace ();} WULAty catch(Exception e){e.printStackTrace ();} =A@>I0(7 } qZ*f%L( +~Tu0?{Z 0 ZIpD{ >/ //读取保存的下载信息(文件指针位置) -#.< 12M private void read_nPos() d
yh<pX/$ { #6=MKpR try{ (wuaxo: DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); *0y{ ~@ int nCount = input.readInt(); 19Ww3PvQ; nStartPos = new long[nCount]; 6)}B"Qd nEndPos = new long[nCount]; LL(|$}yW
for(int i=0;i<nStartPos.length;i++) ZyI$M 3{J { F2;:vTA> nStartPos = input.readLong(); OQp, 3M{_ nEndPos = input.readLong();
NF+<#*1 } FI"HJwAs input.close(); L0Y0&;y|R } =gjDCx$| catch(IOException e){e.printStackTrace ();} 53Yxz3v catch(Exception e){e.printStackTrace ();} I [0!SIqY } M:|8]y@ /=)L_ e[1>(l}Ss private void processErrorCode(int nErrorCode) 6e&$l- { "AC^ rz~U System.err.println("Error Code : " + nErrorCode); "(`2eXRn } c2 A ps 1%~[rnQ sw;|'N$:< //停止文件下载 0[xpEiDx public void siteStop() oC*=JJe, { gL3iw!7 bStop = true; Pbn!KX~F~ for(int i=0;i<nStartPos.length;i++) W:`#% :C fileSplitterFetch.splitterStop(); @gY\;[#. tY+$$GSQj vXv;1T } [AS}RV } dJ
~Zr)> //负责部分文件的抓取 lCIDBBjy^ **FileSplitterFetch.java Ez+Z[*C */ l_{8+\`! package NetFox; epg#HNP7^Y J !HjeZ g(Yb^'X/ import java.io.*; *?t%0){ import java.net.*; A"uULfnk pOT7;-#n 'cBBt public class FileSplitterFetch extends Thread { $s-Y%gc PuL<^aJ Z=?aEU$7 String sURL; //File URL S`!-Cal`n long nStartPos; //File Snippet Start Position -!e7L>w long nEndPos; //File Snippet End Position s?rBE.g@} int nThreadID; //Thread's ID ZnW@YC#9 boolean bDownOver = false; //Downing is over W*N$'% boolean bStop = false; //Stop identical IiJZ5'{ FileAccessI fileAccessI = null; //File Access interface lg$zGa? d0'HDVd <S?#@F\"S public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException "=1;0uy] { ;*2>ES this.sURL = sURL; S( ^.?z this.nStartPos = nStart; x,n,Qlb this.nEndPos = nEnd; ~P.I< nThreadID = id; IkPN?N fileAccessI = new FileAccessI(sName,nStartPos);//定位 k*mt4~KLT8 } 7zemr>sIh W-efv n.}E5%qK public void run() Cbm\h/PXl { `aC){&AP( while(nStartPos < nEndPos && !bStop) . pzC5Ah { z (?=Iv3 c; 2#,m^ YW/QC'_iC try{ he(A3{' URL url = new URL(sURL); `=lc<T^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "N?+VkZEv httpConnection.setRequestProperty("User-Agent","NetFox"); u #w29Pm String sProperty = "bytes="+nStartPos+"-"; (kv?33 httpConnection.setRequestProperty("RANGE",sProperty); _)T5lEFl= Utility.log(sProperty); ml`8HXK0 #OO>rm$ <h-vjz InputStream input = httpConnection.getInputStream(); A/7{oB:a //logResponseHead(httpConnection); ,Wbwg *)M49a*UD Gh.[dF? byte[] b = new byte[1024]; 6( CDNMzj int nRead; Jg}K.1Hs while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) T~0k"uTE { K%v1xZ nStartPos += fileAccessI.write(b,0,nRead); \%]I{ //if(nThreadID == 1) hrG M|_BE // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ~\LCvcY"X } ).^}AFta xG&)1sT#-\ G s+3e8 Utility.log("Thread " + nThreadID + " is over!"); Eow_WW;P bDownOver = true; l
vMlL5t //nPos = fileAccessI.write (b,0,nRead); hCjR&ZA } L>yJ catch(Exception e){e.printStackTrace ();} W\&8auds } x^4xq#Bb7 } Qx;\USv U4aU}1RKz SN7"7jo P< //打印回应的头信息 SCvVt public void logResponseHead(HttpURLConnection con) N ,8/Y { =U%Rvm for(int i=1;;i++) -K9c@? { p$Ox'A4 String header=con.getHeaderFieldKey(i); aT>'.*\ ] if(header!=null) mGp.3 {j //responseHeaders.put(header,httpConnection.getHeaderField(header)); {M-YHX>*;g Utility.log(header+" : "+con.getHeaderField(header)); Lzu.)C@Amx else y{dTp break; .ZvM ^GJb } ![]``g2 } i;LXu%3\ z 9FfU g35DV6 public void splitterStop() I!e} )Y { S;$-''o?9 bStop = true; wiz$fj } ]o cWt3| fFb_J`'ue 3;S,3 } [0"'T[ok 3|.um_ \jOA+FU[ /* bFe+m1Q_ **FileAccess.java _?OW0x4 *//文件访问(定位,写) oD<kMK package NetFox; JSW^dw& import java.io.*; |B?27PD O8B\{T1 ;\f gF@ public class FileAccessI implements Serializable{ s2Mb[#:a" {
^cV lC_ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 su*'d:L RandomAccessFile oSavedFile; %Ev4]}2C1 long nPos; 0NS<?p~_S /YZr~|65 E\Rhz]G( public FileAccessI() throws IOException ,%uo6% { o4|M0 this("",0); E[/\7v\ } SQX:7YF~ RhncBKm*M Ney/[3 A public FileAccessI(String sName,long nPos) throws IOException 8C*c{(4 { 3AU;>D ^5 oSavedFile = new RandomAccessFile(sName,"rw"); Kx>qz.wwI? this.nPos = nPos; 9WyAb3d' oSavedFile.seek(nPos); ;W,XP#{W } pt<!b0G \L}aTCvG e}Cp;c]= public synchronized int write(byte[] b,int nStart,int nLen) "- @{ ) { H(9%SP@[c int n = -1; GhpVi<FL try{ lgFA}p@ oSavedFile.write(b,nStart,nLen); q|BR-0yi n = nLen; C-'n4AY^ } 'AU(WHf catch(IOException e) Bpt%\LK\~O { :td6Mywl e.printStackTrace (); %Ez= } Q$Qs$ 'D(| NYY IoWh&(+KdH return n; 2Sbo7e } B'"(qzE-kM T#%r\f,l0 Y ]&D;w } Uu
~BErEC {^zieP! *-"DZ /* Wm\HZ9PN **SiteInfoBean.java unu%\f>^4 */ $}RBK'cr} package NetFox; ,pL%,>R5 ,paD/ qE?*:$ public class SiteInfoBean { %_C!3kKv~ 6&/n/g sT:$:= private String sSiteURL; //Site's URL ~x;1&\'k private String sFilePath; //Saved File's Path }qU(G3 private String sFileName; //Saved File's Name l2Z!;Wm( private int nSplitter; //Count of Splited Downloading File @)=\q`vV $?RxmWsP TY}9;QL: public SiteInfoBean() 'k[d&sR {//nSplitter的缺省值为5 +EG?8L,z //default value of nSplitter is 5 tmEF7e`(o this("","","",5); &U/7D!^X } W(U:D?e >__t 2 uj#bK
7 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) aoj6/ { 1}nrVn[B9 sSiteURL= sURL; ~k>H4hV3 sFilePath = sPath; ?IgM=@ sFileName = sName;
%GS^=Qr this.nSplitter = nSpiltter; vt)u`/u <^>O<P:v ,SQmQ6h } Za,rht +Y;/10p a{*r^m'N public String getSSiteURL() Dn/{ s$\ { j)?[S return sSiteURL; '4 T}$a"i } &Luq}^u n<RvL^T=
m/}(dT; public void setSSiteURL(String value) g=W1y { K[}5bjh> sSiteURL = value; k~
Z9og } -pEt= qQ\&] V`:iun^f public String getSFilePath() J*HZ=6L { Si=zxy T return sFilePath; qy@v,a } <X]'": D|m]]B 4#D=+70' public void setSFilePath(String value) 8K(3{\J[V { [!Uzw2 sFilePath = value; EVs.'Xg< } v&}+ps_W `Hj{XIOx =)tU]kp public String getSFileName() Gp*U2LB { up`.#GWm return sFileName;
DVNx\t } 66RqjP '2 -<e8\ Z` q]PeS~PjF\ public void setSFileName(String value) gZkjh{rQ { w.v yEU^ sFileName = value; x-W6W } E1'|
;}/ k)l*L1Y4: c j-_ public int getNSplitter() { zGM[A { &U<t*" return nSplitter; #$/SM_X14C } P!uwhha/g H# P)n
R
M H_3-"m &3 public void setNSplitter(int nCount) ]<y _
=> { g$=y#<2? nSplitter = nCount; *c"tW8uR } 2oL~N*^C } snU
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QO9 /! "Yh[-[, /* ?r< F/$/ **Utility.java fg[]>:ZT. */ SU.9;I
! package NetFox; `8 Q3=^)3 gD$bn= x !)[l; public class Utility { "v%|&@ R
2.y=P8N XLG6f(B= F public Utility() {~cG'S Y% { z'iAj $inpiO|s z>n<+tso } 8|9JJ<G7 c{X>i>l> //线程睡眠 &RSUB;ymL public static void sleep(int nSecond) JI&ik_k3 { Ky6.6Y<.| try{ Ndb_| Thread.sleep(nSecond); W
PDL$y } *^h$%<QI catch(Exception e) D I`
M { f[S$Gu4- e.printStackTrace (); 8[2.HM$Y } KDt@Xi6|| } Z:TW{:lrI X?3?R\/ //日志 oh>X/uj public static void log(String sMsg) DM*GvBdR { \a\J0&Z System.err.println(sMsg); |dP[_nh? } R9dC$Y]\M m\h. sg& Q#wl1P public static void log(int sMsg) S`N_}, { 2!UNFv#=$ System.err.println(sMsg); C}})dL;( } \1 ^qfw } N.j?: ~\0uy3% T*m;G( /* O-5s}RT **TestMethod.java ^N{Lau */ +x?_\?&Ks package NetFox; -~wGJM
VA WKHEU)'! 'Dh+v3O public class TestMethod { N sUFM w-[A"M]I @(;zU~l/ public TestMethod() yP&SA+ { ///xx/weblogic60b2_win.exe rXortK#\% try{ bU(H2Fv SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); )JYt zc //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); #gHs!b-g@ SiteFileFetch fileFetch = new SiteFileFetch(bean); xr }jw fileFetch.start(); +N~?_5lv\s } &HS6} catch(Exception e){e.printStackTrace ();} 8ec6J*b AX
{~A:B kO1.27D } 4sj:%%UE ^CZ)!3qd1 =f4v: j}'| public static void main(String[] args) d;Uzl1; { pO2Y'1* new TestMethod(); aP%&-W$D| } L `7~~ } ,g2oqq ? 点击下载更多相关资料
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