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/* EfTuHg$pe **SiteFileFetch.java =!@5! */ w 0V=49 package NetFox; Sb9O#$89 import java.io.*; }3{ x G+, import java.net.*; .?C-J BQ\o?={ 8OYw72& public class SiteFileFetch extends Thread { o;d>< pA
,xDs@37 K'Gv+UC*6 SiteInfoBean siteInfoBean = null; //文件信息Bean +:JyXFu long[] nStartPos; //开始位置 5Z2tTw'i long[] nEndPos; //结束位置 ?8{x/y: FileSplitterFetch[] fileSplitterFetch; //子线程对象 ^xB=d S~ long nFileLength; //文件长度 "JHdF& boolean bFirst = true; //是否第一次取文件 w_O3]; boolean bStop = false; //停止标志 F_Pv\?35z File tmpFile; //文件下载的临时信息 82mKI+9&" DataOutputStream output; //输出到文件的输出流 x*p>l ! U64WTS@ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) bZf18lvij: public SiteFileFetch(SiteInfoBean bean) throws IOException 3k5C;5 { B~[}E]WEK siteInfoBean = bean; 1Wz -Z //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); zcn> 4E) tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); @k"Q e&BQ if(tmpFile.exists ()) DH3.4EUWS { /FP;Hsw% bFirst = false; DU@ZLk3 read_nPos(); 5)IJ|"]y } ( !K?^si else tH7@oV; { nDt1oM
H nStartPos = new long[bean.getNSplitter()]; Oa8lrP`( nEndPos = new long[bean.getNSplitter()]; HAkEJgV } C(RZ09,.S PNjZbOmzS v2vPfb L<GF1I) } .V4w+:i N-lo[bDJh Jp'XZ]o\ public void run() ;w\7p a { Sr9)i8x{ //获得文件长度 &p."`
C //分割文件 qHAZ)Tz //实例FileSplitterFetch zc}qAy'< //启动FileSplitterFetch线程 F|rJ{=x
//等待子线程返回 __F?iRrCM try{ M9_G if(bFirst) m!Iax]D{ { u]D>O$_ s nFileLength = getFileSize(); \R m2c8Z2 if(nFileLength == -1) 2l7Sbs7 { ,-4SVj8$P System.err.println("File Length is not known!"); ?u*gKI } 1XwW4cZ>: else if(nFileLength == -2) \0{g~cU4 { *@E Itj ` System.err.println("File is not access!"); r87)?-B } AGH7z else d]kP@flOV { M[;N6EJH for(int i=0;i<nStartPos.length;i++) )yHJc$OlMx { YY&3M nStartPos = (long)(i*(nFileLength/nStartPos.length)); R(i2TAaaU } -{ae for(int i=0;i<nEndPos.length-1;i++) +IRr&J*P { =LFrV9 nEndPos = nStartPos[i+1]; +c8cyx:^f } =nq9)4o nEndPos[nEndPos.length-1] = nFileLength; lbRm(W( } Hy?+p{{G } iva?3.t SGZ]_ B/iRR2h //启动子线程 v7V.,^6+ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; UL46%MFQ\ for(int i=0;i<nStartPos.length;i++) P ~pC /z { |L@9qwF fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3Zr'Mn siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), GN7\p) nStartPos,nEndPos,i); {3jV ,S Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); #Cwzk{p( fileSplitterFetch.start(); S$=e %c } I T.'`!T // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), A3\%t@y siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); /c`s$h4- // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", RpAtd^I nEndPos = " + nFileLength); EB/.M+~a // fileSplitterFetch[nPos.length-1].start(); !Q`vOVSUD af:wg]g LC!ZeW35 //等待子线程结束 H-*"%SJ //int count = 0; _$W</8< //是否结束while循环 5i 6*$#OM_ boolean breakWhile = false; c]pO'6] nA!Xb'y& w&M)ws;$ while(!bStop) Uf:G,%OYi { NXwlRMbo write_nPos(); H%K,2/Nj Utility.sleep(500); zF&>1y.$ breakWhile = true; vYYLn9}5 jq4'=L$4 208 dr*6U for(int i=0;i<nStartPos.length;i++) 7\BGeI { Ik9 2='Z if(!fileSplitterFetch.bDownOver) [jOvy>2K] { >%~E < breakWhile = false; UF
g N@ break; N+<`Er } )$#
Ku2X } pB3dx#l if(breakWhile) vd4}b> break; GM5s~, " <GDOL )u. ut8![T //count++; 0@ -3U{Q //if(count>4) \X'{ e e // siteStop(); 9Q!X~L|\S } lL*k!lNs rKP;T"?; ~[J&n-bJU System.err.println("文件下载结束!"); IT`r&;5 } )/'y'd<r catch(Exception e){e.printStackTrace ();} /r4QDwu } .js@F/Hp bS0z\!1 -PHVM=: //获得文件长度 7VP[U, public long getFileSize() -?8;-h, h { x?ajTzMv int nFileLength = -1; V9v80e {n4 try{ Eua\N<!aai URL url = new URL(siteInfoBean.getSSiteURL()); c`'2 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); J,8Wo6 httpConnection.setRequestProperty("User-Agent","NetFox"); HWr")%EhD ~%6GF57gC _&/FO{ F@m int responseCode=httpConnection.getResponseCode(); Ib)>M`J if(responseCode>=400) HiBw==vlV { \#bk$R@ processErrorCode(responseCode); (_}w4N# return -2; //-2 represent access is error x)X=sX. } :v_H;UU 0]v:Ix EM_`` 0^ String sHeader; /Z:\=0` cuJ%;q=; |eEcEu?/b for(int i=1;;i++) t~xp&LQiY { -{
Ng6ntS //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); WQ\H2go //Utility.log(in.readLine()); YN\!I sHeader=httpConnection.getHeaderFieldKey(i); `-l,`7e' if(sHeader!=null) /4\!zPPj. { RH,1U3? if(sHeader.equals("Content-Length")) (6C%w)8' { 9zj^\-FA_l nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); *siN#,5 break; |[k/% } u vo2W! } E(i<3U"4h[ else =O
qw`jw break; )~q@2^ } ~-+lZ4} } V 0<>Xo% catch(IOException e){e.printStackTrace ();} c}nXMA^^ catch(Exception e){e.printStackTrace ();} #,dE) Pg3O )D9 :y)'_p *l/ Utility.log(nFileLength); #ii,GN~N C0\A MQR@(>TZy return nFileLength; I("J$ } b|i94y( kaxAIk8l GS^U6Xef //保存下载信息(文件指针位置) Bc{#ia private void write_nPos() =sG9]a<I { D0?l$]aE try{ ~!c~jcq]lZ output = new DataOutputStream(new FileOutputStream(tmpFile)); _v2K1 1 output.writeInt(nStartPos.length); *i[^- for(int i=0;i<nStartPos.length;i++) .P[
%t=W { Z3K~C_0Cnu // output.writeLong(nPos); K0xZZ` output.writeLong(fileSplitterFetch.nStartPos); &H!#jh\w output.writeLong(fileSplitterFetch.nEndPos); sjLI^#a } %J06]FG7 output.close(); h"S+8Y:1{k } lY5a=mwHU catch(IOException e){e.printStackTrace ();} rC>')`uk catch(Exception e){e.printStackTrace ();} VWoxi$3v } ]KMOLe6( y0Pr[XZ ;Ry
)^5Q //读取保存的下载信息(文件指针位置) Ly?yWS-x private void read_nPos() 8=^o2& { (,<ti): try{ gt3;Xi DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); hB#z8D int nCount = input.readInt(); .7-Yu1{2 nStartPos = new long[nCount]; i"uAT$x e nEndPos = new long[nCount]; g)+45w*+5 for(int i=0;i<nStartPos.length;i++) Aj06"ep { *N"bn'>3 nStartPos = input.readLong(); >r7{e:~q nEndPos = input.readLong(); ZbJUOa?WF } L3M]06y input.close(); zT|]!', } ms'!E) catch(IOException e){e.printStackTrace ();} ]9?_m@Ihx catch(Exception e){e.printStackTrace ();} jV^Dj } ".z~c%' `F:PWG` CtwMMZXX3 private void processErrorCode(int nErrorCode) hS4Ljyeg { rIz"_r System.err.println("Error Code : " + nErrorCode); 3Q^@!hu } }}v04~ Xidt\08s C[:Q?LE
//停止文件下载 6KmF 9 public void siteStop() KOWx P47b { #2c-@), bStop = true; 372ewh3' for(int i=0;i<nStartPos.length;i++) !7SZZz fileSplitterFetch.splitterStop(); xq',pzN /U[Y w) \M/XM6:UG4 } ]@bo; . } Sk@~} //负责部分文件的抓取 DoA4#+RU **FileSplitterFetch.java @RKw1$BA */ E)%]?/w package NetFox; o>{+vwK -\@&^e T"-HBwl import java.io.*; HUurDgRi] import java.net.*; { hUbK+dKZ 9I/o;Js KLlo^1.< public class FileSplitterFetch extends Thread { 6Gjr8 0V*L",9M w5|az6wZB! String sURL; //File URL bh:;ovH long nStartPos; //File Snippet Start Position Nzz" w_# long nEndPos; //File Snippet End Position (
3IM7 int nThreadID; //Thread's ID s]0x^"#B boolean bDownOver = false; //Downing is over LjjE(Yrv{ boolean bStop = false; //Stop identical R%XbO~{u FileAccessI fileAccessI = null; //File Access interface FLY# waXA%u50 N. 3
x[%: public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException nm66U4.@ { lKEdpF< this.sURL = sURL; v#:#w.]-Y this.nStartPos = nStart; swuW6p this.nEndPos = nEnd; GWRKiTu9 nThreadID = id; NMmk, fileAccessI = new FileAccessI(sName,nStartPos);//定位 RUm1;MWs } xlkEW&N& Q$G!-y+"i d@pD5n=m; public void run() =dUeQ?>t= { Ra[{K@ while(nStartPos < nEndPos && !bStop) $Ne$s { tlu-zUsi >F6'^9| D#508{) try{ =:mD)oX* URL url = new URL(sURL); =yOIP@ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [F%INl-sy httpConnection.setRequestProperty("User-Agent","NetFox"); " GkBX String sProperty = "bytes="+nStartPos+"-"; wz31e!/ httpConnection.setRequestProperty("RANGE",sProperty); <i`Ipj Utility.log(sProperty); ([iMOE[D3 I0sd%'Ht? { :'#Ts< InputStream input = httpConnection.getInputStream(); #g\O*oYaw //logResponseHead(httpConnection); su>GeJiPW o X )r4H? QNJ )HNLp byte[] b = new byte[1024]; +'Pf|S int nRead; 5;oWFl while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) J,%v`A ~N { j8WnXp_ nStartPos += fileAccessI.write(b,0,nRead); '@i/?rNi%N //if(nThreadID == 1) &z8@ rk| // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); nAG2!2_8 } R}>xpU1 PsMoH/+" d4t%/ Uh Utility.log("Thread " + nThreadID + " is over!"); @v\Osp t= bDownOver = true; gUwg\>UC //nPos = fileAccessI.write (b,0,nRead); Vb az#I } .z4
fJx catch(Exception e){e.printStackTrace ();} ;D&FZ|`(u } *,q ?mO } u6Fm
qK]Dj pSvRyb.K 3Cmbt_WV //打印回应的头信息 fmrd 7*MW public void logResponseHead(HttpURLConnection con) 9`]Gosz { WcqQR))n for(int i=1;;i++) dc.9:u*w { 3cfW|J String header=con.getHeaderFieldKey(i); T'B4 3Q if(header!=null) ?XN=Er^ //responseHeaders.put(header,httpConnection.getHeaderField(header)); `ECT8 Utility.log(header+" : "+con.getHeaderField(header)); z)p(
l! else |fqYMhA U break; FFX-kS } nb
dm@ } uNSaw['0j CAg~K[ qM78s>\-h public void splitterStop() |`vwykhezO { z#9Tg"8] bStop = true; 3kfrOf.4h } Wd"<u2 -E{D'X " E+V>V+ } 5"5!\Zo BV)oF2b: m#6RJbEz /* z7TMg^9# **FileAccess.java mbT4K8<^ *//文件访问(定位,写) N~NUBEKcp package NetFox; 'kU5 import java.io.*; :jL>sGvBv 1OI/!!t1$ R
6JHRd public class FileAccessI implements Serializable{ -wr#.8rzTT 0C!f/EZK //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 DR]=\HQ RandomAccessFile oSavedFile; ZtHTl\z long nPos; -YvnX0j+ zI-]K,! ((0nJJjz public FileAccessI() throws IOException PY81MTv0; { w{F{7X$^ this("",0); <c'0-= } |m{u]9 7slpj8 U]Y</>xGI
public FileAccessI(String sName,long nPos) throws IOException o6bT.{8\ { aF8'^xF oSavedFile = new RandomAccessFile(sName,"rw"); ZZ'5BfI"I% this.nPos = nPos; <|-da&7 oSavedFile.seek(nPos); |WP}y-Au } Q Ev7k _(7f0p w?#s)z4}g public synchronized int write(byte[] b,int nStart,int nLen) SG$V%z"e { vJ,r}$H3 int n = -1; KBC?SxJSJc try{ Gxh r0' oSavedFile.write(b,nStart,nLen); i,V,0{$ n = nLen; XXDLbT'J } x-nO; L-2p catch(IOException e) &&PXWR!%] { >U\1*F,Om, e.printStackTrace (); 'G>$W+lT^ } IL>VH`D xeNj@\jdC5 = Ed0vw return n; ;_X2E~i[ } { )g
$ 0u) m9eg 5Z@0XI } rdH3! ]9$iUA%Ef U9"(jl/o /* ]?G|:Kx$y% **SiteInfoBean.java Ce/l[v */ XCyU)[wY package NetFox; {8* d{0l ;rRV=$y 4`e[gvh public class SiteInfoBean { i 558&: I>EEUQR/$H j:2TicHDC private String sSiteURL; //Site's URL g@2KnzD private String sFilePath; //Saved File's Path .H@b zm private String sFileName; //Saved File's Name 9-+N;g!q private int nSplitter; //Count of Splited Downloading File Kn=0AdM $35C1" PrHoN2y5E public SiteInfoBean() s*Nb=v.e9 {//nSplitter的缺省值为5 9OYyR //default value of nSplitter is 5 \RqH"HqD this("","","",5); 9.%t9RM^ } B:Y F|k}T OO2uE ;( 3 h% eGtd$n public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ,!40\"A { M5a&eO sSiteURL= sURL; GT7&>}FJ) sFilePath = sPath; _\8jnpT: sFileName = sName; ff;~k?L this.nSplitter = nSpiltter; !bCSt?}@u JZdRAL2#v }Y^o("c(
} I_m3|VCa|t +MZI \> %VGW]!QR public String getSSiteURL() YkFAu8b> { RFLfvD< return sSiteURL; u`ryCZo#g } aGd
wuD b"aF-,M> qSGM6kb public void setSSiteURL(String value) y/E:6w { OxPl0-]t sSiteURL = value; 2!6E~<~HC } k`;d_eW K {kd:pr ^TD%l8o6 public String getSFilePath() UEx13!iFo { Y7zs)W8xTT return sFilePath; #mU<]O } =w* 8 ufe|I ohbU~R3{U public void setSFilePath(String value) Q}G2f4 { qyxd9Lk1 sFilePath = value; E~#G_opQA } 6J\ 2=c` <(@Z#%O9) {i+
o'Lw public String getSFileName() _9]vlxgtG( { 8k3y"239t return sFileName; R[14scV } +;\w'dBi, wAw1K 2d x|yJCs> public void setSFileName(String value) $E&T6=Wn { zrqI^i"c sFileName = value; X0iy } 4/%fpU2 /@|iI<| }S8aR:' public int getNSplitter() +SF+$^T { 8h0C G] return nSplitter; eAo+w*D( } Pro?xY$E) mI5J]hk \i/HHP[% public void setNSplitter(int nCount) f=k#o2 { PJ;WNo8 nSplitter = nCount; <T?-A}0uO } "0uM%*2 } Pjk2tf0j` V'e%%&g~N nShXY6bA /* cE:s\hG **Utility.java :{N*Z }] */ &ocuZ-5` package NetFox; 6`7tTn?n " >.tPn D{s87h public class Utility { Zj!,3{jX^ V]; i$ 1Xo0(*O public Utility() y%ij)vQY { *~g*J^R} hcj]T? }3A~ek#*~ } YTFU#F AwXzI;F^ //线程睡眠 cz,QP'g public static void sleep(int nSecond) 'KIT^k0"Ih { o S= !6h try{ %SOXw8- Thread.sleep(nSecond); ;YR/7 } iAZ8Y/ catch(Exception e) _\KFMe=PV { `@
YV e.printStackTrace (); Ij7P-5=< } Fy"M 4;7 } }< H> 9iJ: SFRP
?s //日志 u+Ix''Fn#% public static void log(String sMsg) )I[f(f%W7 { ttUK~%wSx System.err.println(sMsg); IK\~0L;ozE } Sc]K-]1(H 'o6}g p) 6w7; public static void log(int sMsg) /^AH/,p { g}v](Q System.err.println(sMsg); o[cOL^Xd1 } T8a' 6otc } +Q u.86dH GZ~Tl0U ##6\~!P /* {ogBoDS **TestMethod.java #zTy7ZS,0 */ WVRIq' package NetFox; -n.m "O3 gLX<>|)* (DO'iCxlNh public class TestMethod { Jz`jN~ ksC_F8Q+ 3<&:av3 public TestMethod() -`I|=lBz{H { ///xx/weblogic60b2_win.exe &^"Ru?MK try{ = g{I`u SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); bI &<L O //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); bFX{|&tHU SiteFileFetch fileFetch = new SiteFileFetch(bean); SvM\9 fileFetch.start(); vHf)gi}O| } GK}52,NM catch(Exception e){e.printStackTrace ();} gS~H1Ro :|s8v2am rJ Jx8)M } ^[7Mp Qp:I[:Lr; oIE
1j? public static void main(String[] args) L*Z.T^h { Ei_~K'; new TestMethod(); pq{`WgA^ } G$>?UQ[ } .2fvRN92 点击下载更多相关资料
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