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/* V?O%k d **SiteFileFetch.java EIYM0vls( */ jo(Q`oxm!> package NetFox; C5WCRg5& import java.io.*; GY",AL8f import java.net.*; kIfb! \G= E%aK c==Oio(" public class SiteFileFetch extends Thread { *3ne(c L|2COX )>Q 2G/@ SiteInfoBean siteInfoBean = null; //文件信息Bean dq8 /^1P long[] nStartPos; //开始位置 p;7 4+q long[] nEndPos; //结束位置 kR6 t
. FileSplitterFetch[] fileSplitterFetch; //子线程对象 PPqTmx5S long nFileLength; //文件长度 j^ _I{ boolean bFirst = true; //是否第一次取文件 3N
bn|_`( boolean bStop = false; //停止标志 !Q(xOc9>Ug File tmpFile; //文件下载的临时信息 }g*-Ty DataOutputStream output; //输出到文件的输出流 @*uX[) QB.'8B_ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类)
{''|iwLr public SiteFileFetch(SiteInfoBean bean) throws IOException B![5+ { 'iVo,m[yKU siteInfoBean = bean; BH-[q9pf //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); *QG3 Jz tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); YMi(Cyja& if(tmpFile.exists ()) r~}}o o4K { )*A,L% bFirst = false; '<0q"juXE read_nPos(); 6|KX8\,A@ } TN
%"RL else bSr 'ji { r9M={jC nStartPos = new long[bean.getNSplitter()]; Z M+Hb_6f nEndPos = new long[bean.getNSplitter()]; {a3kn\6H0 } ZmULy;{<) `Q&]dE= UC1!J
=f +r0eTP=zf } VRX"
@uCD bS<@Rd{g /SXz_e public void run() qp W#!Vbx { 2ZO'X9 //获得文件长度 [)3 U])w/ //分割文件 B
(1,Rq[ //实例FileSplitterFetch <]'"e] //启动FileSplitterFetch线程 p0rwiBC=q //等待子线程返回 @1F 'V' try{ >$mSFJz5S if(bFirst) $&8h=e~]- { (J*w./ nFileLength = getFileSize(); )zXyV]xe if(nFileLength == -1) 7rSUSra { (oXN >^-D System.err.println("File Length is not known!"); VWshFI } DVhTb else if(nFileLength == -2) 1qC:3
;P { ~+#--BhV System.err.println("File is not access!"); Uxemlp%%* } 5b#6 Y else qP"JNswI_ { X[Ek'=} for(int i=0;i<nStartPos.length;i++) be:phS4vz { -L9R&r#_e nStartPos = (long)(i*(nFileLength/nStartPos.length)); 8'lhp2#h } <KwK
tgzs for(int i=0;i<nEndPos.length-1;i++) Uk:.2%S2 { 16QbB; nEndPos = nStartPos[i+1]; z`/.v&<>V } #Q3PzDfj nEndPos[nEndPos.length-1] = nFileLength; Fd[h9 G } %?f:" }
nuQ6X5>.= $G_Q`w=jM M%{?\)s //启动子线程 g`OOVaB fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; R*@[Pg* for(int i=0;i<nStartPos.length;i++) jBv$^L { EB>B,# fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ]zyX@=mM siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), L)lQ&z? nStartPos,nEndPos,i); OF&h=1De, Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); V->%)d3i fileSplitterFetch.start(); b!]0mXU } ^W"Q(sh // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %kx
^/DH siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); !&`\ LJ=j // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", D4q>R; nEndPos = " + nFileLength); YvruK:I // fileSplitterFetch[nPos.length-1].start(); `OP>(bU0 lB!vF ~A& 6B''9V:s //等待子线程结束 PDIclIMS'F //int count = 0; m*!f%}T //是否结束while循环 4C1FPrh boolean breakWhile = false; 14D7U/zer *w/WHQ`xI /u)Rppu while(!bStop) 8rwYNb.P { R|1xXDLm*E write_nPos(); ~pevU`}Uqc Utility.sleep(500); ^5]uBOv breakWhile = true; gKN}Of@^1 iS"8X#[]N uyNJN for(int i=0;i<nStartPos.length;i++) Vd+Q:L { 5!AV!A_Jp if(!fileSplitterFetch.bDownOver) d;~ 3P
{ rer|k<k;]G breakWhile = false; voV:H[RD9 break; -+}5ma } jJVT_8J } &$c5~9p\B if(breakWhile) i<m$#6<Z break; +~d1;0l| |qlS6Aln x=5P+_ //count++; e8WEz
4r_ //if(count>4) L}W1*L$;< // siteStop(); ku9@&W+ } wn+j39y?ZY
j/9WOIfa t'R':+0Vf System.err.println("文件下载结束!"); t<sNc8x }
3@)obb catch(Exception e){e.printStackTrace ();} :)p)=c8% } JoCA{Fa} ,;.B4 0/\PZX+ //获得文件长度 {pDTy7!Hs public long getFileSize() UP;Q= t { A XBkJ'jd int nFileLength = -1; hOPe^e" try{ l(%k6 URL url = new URL(siteInfoBean.getSSiteURL()); > BNw HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); b]*X<,p httpConnection.setRequestProperty("User-Agent","NetFox"); cJ(BiL-uF M
XZq _BV`,`8} int responseCode=httpConnection.getResponseCode(); 8xF)_UV if(responseCode>=400) Wp5]Uk { B6bOEPQ processErrorCode(responseCode); H`m:X,6} return -2; //-2 represent access is error oYz!O]j;a } TZ_rsj/t x(PKFn k6Ihc?HL String sHeader; gYatsFyL 53
@oP (*,8KLV_i for(int i=1;;i++) )O3jQ_q= { QjA&IZEC
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); b~_B
[cf //Utility.log(in.readLine()); 4:vTxNs&S sHeader=httpConnection.getHeaderFieldKey(i); z)lM2x>|* if(sHeader!=null) ]@X{dc { 47IY|Jdz if(sHeader.equals("Content-Length")) r6`\d k { o+<29o nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); upypxC break; <jeh`g } XOrcygb2 } akT|Y4KxD else Lt1U+o[ot break; =<{h^-j;a } Ic'Q5kfM } R]u
(l+` catch(IOException e){e.printStackTrace ();} lv4(4$T catch(Exception e){e.printStackTrace ();} 90~*dNk bV@7mmz:X+ Sx8l<X Utility.log(nFileLength); &p5&=zV} HZ
}6Q %>Bko,ET return nFileLength; @(-yrU } +?;j&p pOMgEEhfS _J,xT //保存下载信息(文件指针位置) {FWyu5. private void write_nPos() s~^*+kq { tBseqS3< try{ `(!NYx output = new DataOutputStream(new FileOutputStream(tmpFile)); j 1(T )T output.writeInt(nStartPos.length); *>k!hq;j for(int i=0;i<nStartPos.length;i++) $A`xhh[ {
EX:{EmaT // output.writeLong(nPos); W,3zL.qH" output.writeLong(fileSplitterFetch.nStartPos); o(qEkR:4kd output.writeLong(fileSplitterFetch.nEndPos); c3] C:t+ } 3 > |uF output.close(); -Q$b7*"z( } -#aZF2z catch(IOException e){e.printStackTrace ();} 'M8aW!~ catch(Exception e){e.printStackTrace ();} Wr5 Q5s)c } EJLQ&oH[ vU!8`x) Z:@6Lv?CN //读取保存的下载信息(文件指针位置) _gW{gLYyJ private void read_nPos() |5,<jyp { tMFsA`ng try{ &~#iIk~% DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); DLi?'K3t int nCount = input.readInt(); XJSa]P^B1 nStartPos = new long[nCount]; EMlIxpCn: nEndPos = new long[nCount]; "jR]MZ for(int i=0;i<nStartPos.length;i++) >,"sHm}l% { ,=|4:F9
nStartPos = input.readLong(); `
W4dx& nEndPos = input.readLong(); ne4c%?>t } CWi8Fv input.close(); < Dd% } W"Q!|#;l. catch(IOException e){e.printStackTrace ();} E-fr}R} catch(Exception e){e.printStackTrace ();} ',ZF5T5z@ } 2n|CD|V$ux %/T7Z;d o G_C?(7> private void processErrorCode(int nErrorCode) :p>hW!~ { Ma6W@S System.err.println("Error Code : " + nErrorCode); ZenPw1 - } S`iR9{+& ewnfeg1 rbyY8
bX //停止文件下载 Mvb':/M public void siteStop() )KY:m |Z { g9KTn4 bStop = true; #cU^U#;= r for(int i=0;i<nStartPos.length;i++) AW~"yI< fileSplitterFetch.splitterStop(); } ptMjT{9 .!RavEg+ `~h4D(n` } ,l HLH } {)@D`{$ //负责部分文件的抓取 PKf:O **FileSplitterFetch.java exDkq0u] */ Hi7y(h?wj package NetFox; 81F,Y)x. r_U>VT^E: uS<_4A;sD, import java.io.*; $^_|j1z#i import java.net.*; xWE8Wm CzVmNy)kl c%f_.MiU public class FileSplitterFetch extends Thread { &yIGr`; s-rfS7; %=Tr^{i String sURL; //File URL ;..o7I long nStartPos; //File Snippet Start Position 1 ] #9
long nEndPos; //File Snippet End Position *Zbuq8> int nThreadID; //Thread's ID G[Tl%w boolean bDownOver = false; //Downing is over kl}Xmw{tJ boolean bStop = false; //Stop identical _xrwu;o0} FileAccessI fileAccessI = null; //File Access interface ,9of(T(~ rzeLx Wt /ty?<24ko public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException wLJ]&puwm { tous#(&pK this.sURL = sURL; S8vV!xO this.nStartPos = nStart; E m{aM this.nEndPos = nEnd; XOy2lJ/ nThreadID = id; }Ln@R~[ fileAccessI = new FileAccessI(sName,nStartPos);//定位 ~/-eyxLTm } -rSIBc:$8 #0"~G][# +(?>-3_z public void run() UBZ9A { >#(n"RCHf while(nStartPos < nEndPos && !bStop) g|%L"-%gJ { C#Bz>2;# %Mn.e a D WiBG try{ L":bI&V?: URL url = new URL(sURL); _P7tnXww HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 1S:|3W httpConnection.setRequestProperty("User-Agent","NetFox");
CN& String sProperty = "bytes="+nStartPos+"-"; *>q/WLR httpConnection.setRequestProperty("RANGE",sProperty); sZhMa> Utility.log(sProperty); 'Ot,H_pE a|_p,_ ~i~%~doa InputStream input = httpConnection.getInputStream(); @jy41eIo //logResponseHead(httpConnection); K#mOSY;} gfa[4
z Q2|p\rO byte[] b = new byte[1024]; uQqWew8l+ int nRead; Pbu{'y3J while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) v?:: |{ { oPQtGl p nStartPos += fileAccessI.write(b,0,nRead); [xZU!= //if(nThreadID == 1) OMrc_)he\ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); $V>yXhTh } r[txlQI9 +T{'V^ #{J,kcxS Utility.log("Thread " + nThreadID + " is over!"); $_;e>*+x bDownOver = true; 1wj:aD?g //nPos = fileAccessI.write (b,0,nRead); If-_?wZe } <skajQQ catch(Exception e){e.printStackTrace ();} Vw{*P2v) } K>/%X!RW } \2C`<h$fN
_D,
;MB&7 NjuiD]. //打印回应的头信息 R^#@lI~ public void logResponseHead(HttpURLConnection con) OE`X<h4r { =aG xg57 for(int i=1;;i++) -yAQ { vH[47Cv G5 String header=con.getHeaderFieldKey(i); s)J(/ if(header!=null) #qBr/+b //responseHeaders.put(header,httpConnection.getHeaderField(header));
nY%5cJ`" Utility.log(header+" : "+con.getHeaderField(header)); p#P~Q/; else /=?x{(B> break;
q2aYEuu, } N)2f7j4C& } Z.PBu|Kx V$`Gwr]|n IM@tN L public void splitterStop() ?~e3&ux { fwR_OB:$ bStop = true; 7- d.ZG } <O<LYN+( (!L5-8O `)iY}Iu } &[Xu!LP fV>CZ^=G k?B[>aQn.0 /* dihjpI_ **FileAccess.java Uz7oL8 *//文件访问(定位,写) %r\n%$@_ package NetFox; '9p@vi{\ import java.io.*; eV^d6T$ "r4AY jKIxdY:U public class FileAccessI implements Serializable{ y&~w2{a \>. LW9 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 1/+C5Bp* RandomAccessFile oSavedFile; {$D,?V@%_ long nPos; >SF Uy\3 Cwa^"r3P1 Jzji&A~ public FileAccessI() throws IOException f"[J"j8 { *D}0[|O this("",0); f5*k7fg } 4S"\~>< \W5O&G-C JCx
WWre public FileAccessI(String sName,long nPos) throws IOException +j_;(Gw7 { |y;}zQB-dH oSavedFile = new RandomAccessFile(sName,"rw"); 3981ie this.nPos = nPos; VZr>U*J[: oSavedFile.seek(nPos); {Bs~lC$ } ia&AW (_kp{0r# e~%
;K4 public synchronized int write(byte[] b,int nStart,int nLen) (/d5UIM{& { 94uNI8 int n = -1; }"vW4 try{ vy2Q g
oSavedFile.write(b,nStart,nLen); Y`7~Am/r;& n = nLen; j`'`)3f } T3UMCqc= catch(IOException e) QZp6YSz.4 { : JzI>/ e.printStackTrace (); ,j;m!V } )UgX3+@ (s<Dd2&.H ;7]u!Q return n; 5,qj7HZF } _R'Fco '|]e<Mt- Q)m4_+,d } ?&G`{Ey E1dD7r\ ^'CPM6J /* Xp\/YJOibd **SiteInfoBean.java OMhef,,H */ w{[=l6L m package NetFox; 4%4avEa"w (fNUj4[ v 8T$ &-HJ public class SiteInfoBean { 'w>_+jLT #/"8F O%~p mpAR7AG6 private String sSiteURL; //Site's URL W>r#RXmh private String sFilePath; //Saved File's Path ?]fF3 SJk private String sFileName; //Saved File's Name 2XTPBZNe private int nSplitter; //Count of Splited Downloading File bmN q[} 7{e{9QbJ4 LTNj| u public SiteInfoBean() 3!Sp0P {//nSplitter的缺省值为5 :q8b;*: //default value of nSplitter is 5 3czeTj this("","","",5); [U}+sTQ } =PRx?q`d S)QAXjH ;Op3?_ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) +4[^!q*
H { s2?T5oWU sSiteURL= sURL; b KTcZG sFilePath = sPath; tQZs.1=z sFileName = sName; &PkLp4mQ this.nSplitter = nSpiltter; p
raaY}} @L.82p{h Um1[sMc{au } M02uO`Y9 WZOY)>K l"\~yNgk public String getSSiteURL() ]k9)G* { mNmLyU=d return sSiteURL; q@b|F- } \V9Z#> -.g|l\ NCxqh < public void setSSiteURL(String value) RoCfJ65 { 0|R# Tb;Y sSiteURL = value; ;a-$D]Db } <0yE
5Mrf uOa26kE4 C6O8RHg public String getSFilePath() ??n*2s@t { /Q,{?';~ return sFilePath; W@yJAQ } c/B'jPt 66^ycZCH &1+X\c+tb public void setSFilePath(String value)
'9c2Q/ { jiF?fX@ sFilePath = value; 4iW'kuK } D:Q
21Ch IbcZ@'RSw >^Se'SE] public String getSFileName() Hm+ODv9 { D")_;NLE1 return sFileName; Lh.`C7] } sp@E8G%xO ,K:ll4{b
#gm)dRKm% public void setSFileName(String value) kId
n6 Wx, { A
AHt218 sFileName = value; J8Yd1.Qj } `%09xMPu mhW-J6u* +~xnXb1 public int getNSplitter() &$`yo` { DGevE~ return nSplitter; _fZZ_0\Q } Oy 2+b1{ j5
g# M '#(v=|J public void setNSplitter(int nCount) )K'N(w { aZEn6*0B nSplitter = nCount; zG e'*Qei } /r12h| } v)2M1 `vc
"Q/ b)9'bJRvU /* S(\9T1DVe **Utility.java -=.V
' */ ?<6CFH] package NetFox; l4TpH|k 'ejvH;V3i " R8KQj public class Utility { 0flg=U9 Ela-,(Glk M-i_#EWP public Utility() &Q}*+Y]G { Xn~I=Ml d $.Q$`/dF zni)<fmju } Isx#9C
BUwONF //线程睡眠 RxMH!^ public static void sleep(int nSecond) ORu2V#Z[ { -{`@=U try{ |Yq$sU Thread.sleep(nSecond); c{[q>@y
pK } A>{p2?`+! catch(Exception e) Fq9Q+RNMZL { zD3mX<sw e.printStackTrace (); 9<Kj6t_ } +:3* } gIA@l`" sBV4)xM //日志 1Z{ZV.! public static void log(String sMsg) lC=~$c: { ;(}V"i7Hu System.err.println(sMsg); au,t%8AC } ^<X@s1^# t<n"-Tqu .(Qx{r$ public static void log(int sMsg) ,RN:^5 p { "QvmqI> System.err.println(sMsg); QMEcQV> } (|wz7AY2 } R0oKbs{ WW~+?g5 G|\^{5 /* f<A5?eKw **TestMethod.java .Vq)zi1< */ ]tY
^0a package NetFox; Dde]I_f} M4xi1M#% 0-{tFN public class TestMethod { #M A4 #[#KL/i)$ m~uOXb public TestMethod() b*ef); { ///xx/weblogic60b2_win.exe ':R,53tjl try{ 7mm1P9Z SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); f-nz{U //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); g R
nOd SiteFileFetch fileFetch = new SiteFileFetch(bean); t#!yrQ..'G fileFetch.start(); ["}rk } @,XSs catch(Exception e){e.printStackTrace ();} 2 1PFR:lP7 ![f ![l /t-fjB{=G } vd6l7"0/ H~ u[3LQz 6=N`wi public static void main(String[] args) hVUP4 A { oq*N_mP0
new TestMethod(); UJs$q\#RO } gl&5l1& } h~wi6^{&Y 点击下载更多相关资料
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