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/* ;.AMP$o`(Y **SiteFileFetch.java kBqgz|jE% */ Ye]K 74M. package NetFox; lD0a<L3 import java.io.*; .u\$wJ9Ai import java.net.*; (.=ig
X 7>z {2D J;~YD$ public class SiteFileFetch extends Thread { Aa_@&e [;Ih I T;3qE1c SiteInfoBean siteInfoBean = null; //文件信息Bean FS5iUH+5 long[] nStartPos; //开始位置 =~J VU long[] nEndPos; //结束位置 iDcTO} FileSplitterFetch[] fileSplitterFetch; //子线程对象 %Mj,\J! long nFileLength; //文件长度 aAe`o2Xs boolean bFirst = true; //是否第一次取文件 gs!'*U) boolean bStop = false; //停止标志 oUn+tu: File tmpFile; //文件下载的临时信息 w2xD1oK~o DataOutputStream output; //输出到文件的输出流 5wW5
n5YS +%j27~R>D //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ,vLQx\m{ public SiteFileFetch(SiteInfoBean bean) throws IOException cWo>DuW& { Rd HCb k siteInfoBean = bean; ~S<aIk0l //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); hiibPc?I tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); uDND o if(tmpFile.exists ()) mKu,7nMvF { -BP10-V bFirst = false; Ms +ekY) read_nPos(); OIj.K@Kr } V'#R1 x"3 else 7k,BE2]" { q)9n%- YgP nStartPos = new long[bean.getNSplitter()]; %\HE1d5; nEndPos = new long[bean.getNSplitter()]; fZpi+I } J:"@S%gy% <[n:Ij 05{}@tW- =v^#MU{k? } 31c*^ZE. U2?R&c;b [-[59H[6) public void run() C)R hld { }F0<8L6% //获得文件长度 = r/8~~= //分割文件 2~\SUGW- //实例FileSplitterFetch QY4;qA //启动FileSplitterFetch线程 'm`}XGUBS //等待子线程返回 UapU:>!"` try{ VqvjOeCbH if(bFirst) .'A1Eoo0d { B-_b.4ND) nFileLength = getFileSize(); ]B;`Jf if(nFileLength == -1) Z[w}PN,xV { ip<VRC5`5 System.err.println("File Length is not known!"); Wk7E&?-:6 } @Ol(:{< else if(nFileLength == -2) y+k^CT/u { P<Bx1H-z- System.err.println("File is not access!"); vGlVr.) } (/<Nh7C1c else pt"9zkPj { T5|kO:CbHq for(int i=0;i<nStartPos.length;i++) ;8XRs?xyd { "[P3b"=gW nStartPos = (long)(i*(nFileLength/nStartPos.length)); $.C-_L } m
W>Iib| for(int i=0;i<nEndPos.length-1;i++) >v, si]. { 9s_^?q nEndPos = nStartPos[i+1]; &*"*b\ } JDR_k nEndPos[nEndPos.length-1] = nFileLength; deaB_cjdI } 6d/Q"As } n"RV!{& ;PC! "P#1= //启动子线程 izcaWt3 a fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 5b/ ~]v for(int i=0;i<nStartPos.length;i++) m-azd~r[ { .Ja].hP fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~Z/,o) siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), NW5OLa")J< nStartPos,nEndPos,i); X uE: dL? Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); W9w*=W
)Z fileSplitterFetch.start(); @I-gs( } }NyQ<,+mq& // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), u$^tRz9 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); WN=0s // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 0D 2I)E72o nEndPos = " + nFileLength); CnL=s6XD' // fileSplitterFetch[nPos.length-1].start(); PlH~um[J MuOKauYa nyi!D //等待子线程结束 tXtNK2-1 //int count = 0; f%.Ngf9 //是否结束while循环 Z[IM\# " boolean breakWhile = false; LWJ ?p-X Y&yfm/R u M\4`S& while(!bStop) K [DpH& { t?G6|3 write_nPos(); 0c`zg7| Utility.sleep(500); 2H4vK]]Nl breakWhile = true; hm73Zy RVV` pAatv;Ex for(int i=0;i<nStartPos.length;i++) uEJ8Lmi { 3<W%z]k@M if(!fileSplitterFetch.bDownOver) :6lv X$ { MBg[hu% breakWhile = false;
lvWwr!w break; ?< b{ } L>~Tc } )L:e0u if(breakWhile) 1X5g(B
break; <EUR: kd^H}k B ktRA //count++; A/<u>cCW //if(count>4) 4{F1GW // siteStop(); ErNYiYLi] } Oq.ss!/z =J]WVA,GqA DBHy%i System.err.println("文件下载结束!"); 3U >-~-DS } &;-zy%#l catch(Exception e){e.printStackTrace ();} U)bv,{-q } ,J|,wNDU!K RX>P-vp 0uDDaFS //获得文件长度 IANSpWea? public long getFileSize() o0 C&ol_ { eo9/ int nFileLength = -1; ~I5hV}ZT try{ >E<ib[vK[ URL url = new URL(siteInfoBean.getSSiteURL()); RN(I}]] a HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); CfU|]< httpConnection.setRequestProperty("User-Agent","NetFox"); 0mSP
.fl r A!bG 2{r int responseCode=httpConnection.getResponseCode(); nFn!6,>E if(responseCode>=400) NV4g5)D&L { >l&]Ho processErrorCode(responseCode); Y'|,vG return -2; //-2 represent access is error 4uIYX } EpAgKzVpJ Z71m(//*} D|9+:Y String sHeader; *(Dmd$|0| PoF3fy%. <R$ 2x_ for(int i=1;;i++) h`|04Q { ]j*2PSJG //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Lg7A[\c
~ //Utility.log(in.readLine()); EhHxB
fAQ sHeader=httpConnection.getHeaderFieldKey(i); m]2xOR_ if(sHeader!=null) {=[>N>" { 3^y(@XFt if(sHeader.equals("Content-Length")) hN'])[+V { _f[Q\gK nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 0y9 b0G break; p'
>i3T( } lDYgtUKG } GF ux?8A:% else SQ>i:D; break; ZUQ
_u } >Wr%usNxc } d<a|dwAeh catch(IOException e){e.printStackTrace ();} 1Nt
&+o catch(Exception e){e.printStackTrace ();} K29/7A/ EG>?>K_D !?>V^#c Utility.log(nFileLength); }S/i3$F0~ dgw.OXa QadguV6| return nFileLength; Ym6d'd<9( } {.:$F3T q?(]
Y* Y b+A{` //保存下载信息(文件指针位置) OT{"C"%5t private void write_nPos() @z@%vr=vX { D!&(#Vl
_ try{ y+(\:;y$7 output = new DataOutputStream(new FileOutputStream(tmpFile)); k]@]a output.writeInt(nStartPos.length); +Y%6y]8 for(int i=0;i<nStartPos.length;i++) y"q
aa { qNEp3WY: // output.writeLong(nPos); "bo0O7InOV output.writeLong(fileSplitterFetch.nStartPos); TQ4@|S:OF output.writeLong(fileSplitterFetch.nEndPos); {6'Xz } L|'^P3#7` output.close(); Z4] n<~o } }g}Eh>U catch(IOException e){e.printStackTrace ();} 5}#wp4U catch(Exception e){e.printStackTrace ();} ,S-h~x } \Rny*px (&:gD4. D4=*yP //读取保存的下载信息(文件指针位置) 79h~w{IT@ private void read_nPos() fW-C`x { ShB]U5b:k try{ 3"y 6|e/5 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); !
xCo{U= int nCount = input.readInt(); z]G|)16
nStartPos = new long[nCount]; s*izhjjX nEndPos = new long[nCount]; \/NF??k,jk for(int i=0;i<nStartPos.length;i++) ukWn@q* { 1-_r\sb nStartPos = input.readLong(); \fA{ sehdL nEndPos = input.readLong(); 3'4+3Xo } ^ po@U" input.close(); gF)9a_R%p } "%-Vrb=:Y catch(IOException e){e.printStackTrace ();} 5> x_G#W catch(Exception e){e.printStackTrace ();} ffrIi',@ } vQMBJ& 8`q7Yss6F }E
'r?N private void processErrorCode(int nErrorCode) _Iy\,< { 8%[pno
|0I System.err.println("Error Code : " + nErrorCode); @Wu-&Lb } _;1{feR_ d?2V2`6 =kd$??F //停止文件下载 9njl,Q: public void siteStop() "z~ba>,-\ { ux; ?WPyr bStop = true; Ke$_l]} for(int i=0;i<nStartPos.length;i++) [xMa^A>p fileSplitterFetch.splitterStop(); fj_23{,/"g /at7H! qkb'@f= } EApKN@<" } Z>rY9VvWD //负责部分文件的抓取 nr!N%Hi **FileSplitterFetch.java F-yY(b]$ */ ^#/FkEt7bp package NetFox; 3nxG>D7 v4P"|vZ$& #.Rn6|V/4 import java.io.*; f9D e!"*& import java.net.*; l:85 _E (j:
ptQ2$ ^jdU4 public class FileSplitterFetch extends Thread { t^rw@$"} )Z}AhX >yBqi^aL String sURL; //File URL ?8b19DMK6 long nStartPos; //File Snippet Start Position !|cg= long nEndPos; //File Snippet End Position yeo&Qz2vU int nThreadID; //Thread's ID P?54"$b boolean bDownOver = false; //Downing is over c`a( boolean bStop = false; //Stop identical FcDS*ZEk! FileAccessI fileAccessI = null; //File Access interface %Sr+D{B /R)wM#& +&EXTZ@o public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException mDB { \/a6h this.sURL = sURL; M([#Py9h this.nStartPos = nStart; ud1M-lY\U this.nEndPos = nEnd; .Eao|; nThreadID = id; \CbJU fileAccessI = new FileAccessI(sName,nStartPos);//定位 UtZ,q!sg } C-'hXh;hQ {1W:@6tl ccD+AGM.
public void run() W yL+HB} { Fnw:alWr while(nStartPos < nEndPos && !bStop) dAo;y.3 { Rj8%% G-pt P]_d;\
!"v 2eT?qCxqc try{ K1B9t{T URL url = new URL(sURL); MmuT~d/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); kB\{1; httpConnection.setRequestProperty("User-Agent","NetFox"); E~'mxx~i String sProperty = "bytes="+nStartPos+"-"; x(_[D08/TT httpConnection.setRequestProperty("RANGE",sProperty); UO/sv2CN Utility.log(sProperty); :+rGBkw1m 7s9h:/Lu wj|Zn+{"nF InputStream input = httpConnection.getInputStream(); ,"(L2+Yp //logResponseHead(httpConnection); ]Bw0Qq F# sDY~jP[Oa :6^7l/p byte[] b = new byte[1024]; ?$ r`T]>`2 int nRead; J=4>zQLW while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) PNU(;&2< { E-e(K8R nStartPos += fileAccessI.write(b,0,nRead); $6hPTc<C //if(nThreadID == 1) =YO ]m< // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 5j%G7.S\ } jmok]-pC f8
d
3ZK AOf4y&B>q Utility.log("Thread " + nThreadID + " is over!"); jG5HW*>k0 bDownOver = true; nB[-KS //nPos = fileAccessI.write (b,0,nRead); ~(5r+Z}*` } *{o7G a catch(Exception e){e.printStackTrace ();} 0D X_*f } .6B\fr.za } <g4}7l8 .R9Z$Kbq e|~MJu+1 //打印回应的头信息 XR5KJl public void logResponseHead(HttpURLConnection con) Xlo7enzY { 5E:$\z; for(int i=1;;i++) 5of3& { zM0NRERi String header=con.getHeaderFieldKey(i); =W(*0"RM if(header!=null) B5e9'X^
[ //responseHeaders.put(header,httpConnection.getHeaderField(header)); p6VD*PT$& Utility.log(header+" : "+con.getHeaderField(header)); Z 6jEj9?O else *6uccx7{ break; ?GhyVXS y. } p 7? } Fe+
@; s?SspuV x 3@-E public void splitterStop() oFY!NMq}: { ~MpikBf bStop = true; ;"3B,Yj } jYsAL=oh,* c/{FDN >.h:Y5 } Fsx?(?tCMo 4
1_gak; *O?c~UJhhV /* _n&Nw7d2
M **FileAccess.java rS8a/d~;0 *//文件访问(定位,写)
&)eg3P)7 package NetFox; (FuIOR import java.io.*; 4<s.|W` bOY;IB
_ c:R?da public class FileAccessI implements Serializable{ J~YT~D2L WJ7|0qb //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 '<Z[e`/ RandomAccessFile oSavedFile; ^0VL](bD> long nPos; h}bfZL E?m~DYnU q76POytV| public FileAccessI() throws IOException 'CLZ7pV { i`,FXF) this("",0); ;C]Ufk } h}b:-a 8hRcB[F~S 1MelHW public FileAccessI(String sName,long nPos) throws IOException v=`yfCX-qX { x2"iZzQlD oSavedFile = new RandomAccessFile(sName,"rw"); LQ0/oYmNc this.nPos = nPos; yNu_>!Cp5 oSavedFile.seek(nPos); ?^|`A}q# } 18g_v"6o :_{8amO Cu"Cpt[ public synchronized int write(byte[] b,int nStart,int nLen) .UyE|t4
{ HL)!p8UHJ int n = -1; J3$>~?^1 try{ ~lj~]j oSavedFile.write(b,nStart,nLen); 0D-`>_ n = nLen; ]`^! ]Ql } M .#} catch(IOException e) $JE,u'JQ { !(sn9z# e.printStackTrace (); e3~MU6 } >mGH4{H 0^;2 K g@'mG return n; f%Q)_F[0D4 } +`y(S}Z =KRM`_QShg TS<d?: } /-=fWtA lFBdiIw <}a?<):S /* +X?ErQm **SiteInfoBean.java ~ELY$G.xl */ =w2 4(S package NetFox; PK*Wu<< K+g[E<x\= X-pbSq~5 public class SiteInfoBean { [g}Cve#i _0H oJ 0zt]DCdY private String sSiteURL; //Site's URL dj gk7 private String sFilePath; //Saved File's Path }nx)|J*p private String sFileName; //Saved File's Name U>5^:%3 private int nSplitter; //Count of Splited Downloading File 16NHzAQ =C\Tl-$\f 4vhf!!1 public SiteInfoBean() MlO OB {//nSplitter的缺省值为5 -Cf)`/ //default value of nSplitter is 5 }$6L]
this("","","",5); sqkWQ`Ur } ~uQ*u.wi )'shpRB;1 Spm 0` public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 6F\ 6,E { V&mkS sSiteURL= sURL; I16FVdUun4 sFilePath = sPath; ;Iu _*U9) sFileName = sName; Met?G0[ this.nSplitter = nSpiltter; {gMe<y <'Q6\R}:vC rxCzPF } $H:!3-/ ?d')#WnC + NlnK6T/ public String getSSiteURL() F>;Wbk&[| { U)}]Z@I- return sSiteURL; d)%WaM%V } SX4*804a_ A#U! KX Koa9W>! public void setSSiteURL(String value) xd Z$|{, { ^F^g(|(K sSiteURL = value; Q_mphW:[ } -jH|L{Iyq} @@d_F<Ym[ #UGSn:D<i public String getSFilePath() T"wg/mT { *d._H1zT return sFilePath; '%$Vmf)= } >?g@Nt8 j^G=9r[, >%/x~UFc5 public void setSFilePath(String value) :!gNOR6Lh { CmEqo;Is sFilePath = value; 'g#%> } )~2\4t4|g 2mLZ4r>WE @K;b7@4y public String getSFileName() `}X3f#eO& { 5F kdGF return sFileName; F5)`FM^R } IjI'Hx !do`OEQKR K EAXDF public void setSFileName(String value) dx%z9[8~{. { 3%v)!dTa<^ sFileName = value; *l5?_tF } #W\}v(Ke 8Vu@awz{L Okq,p=D6 public int getNSplitter() DrRK Sc(u9 { +n^M+ea; return nSplitter; OGZD$j } +!lDAkW0 qS?o22 ~aC ?M& public void setNSplitter(int nCount) PD#,KqL: { <4r8H-(% nSplitter = nCount; reu[rZ& } %;`Kd}CO } (j}7|*. <J509j j>8DaEfwx /* ;|Cdq **Utility.java b.*LmSX# */ c^}G=Z1@ package NetFox; .*zN@y3 ^O|fw?, tYA@J[" ^ public class Utility { /x3*oO1 pBtO1x6x/ `[H^` public Utility() !Asncc G { #GM^ :rF D
e&,^"% 5lsslE+:J } ^'QO!{7f U]hqRL //线程睡眠 [@@{z9c public static void sleep(int nSecond) fPeS; { *p/,Z2f try{ ^h?fr` Thread.sleep(nSecond); @O"7@%nu } ^\}MG!l catch(Exception e) |E+.y&0; { ZRMim6a4X e.printStackTrace (); vQ rxx } i6Z7O)V } B=A!hXNa cSL6V2F //日志 *\ii+f- public static void log(String sMsg) I`_2Q:r { Snr(<u System.err.println(sMsg); l";Yw]:^ }
f' A$':Y rLTBBvV SZGR9/*^ public static void log(int sMsg) Yxq!7J { ]zx%"SUM System.err.println(sMsg); h@RpS8!Bi } YsmRY=3 } fcq8aW/z_ bPVk5G*ruP 461g7R%r /* 8063LWV **TestMethod.java SkuR~! */ JrcbJt package NetFox; b1Vr>:sK47 4,y7a=qf3 f*%kHfaXgN public class TestMethod { !Yof%%m$; X>I3N?5 U["0B8 public TestMethod() h$5[04.Q { ///xx/weblogic60b2_win.exe U7WYS8 try{ y[N0P0r l: SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); )rEl{a //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); [!uzXVS3 SiteFileFetch fileFetch = new SiteFileFetch(bean); @i#JlZM_ fileFetch.start(); B:h<iU:'D } |_?e.}K catch(Exception e){e.printStackTrace ();} >XtfT' 5 `1 gnJ8tuS } a0NiVF-m% jG>W+lq 9#9 UzKX# public static void main(String[] args) @gN"Q\;F { O2fq9%lk new TestMethod(); Avw=*ZW } ///Lg{ie } 96w2qgc2 点击下载更多相关资料
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