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/* 1QF*e' **SiteFileFetch.java s@)"IdSA( */ w]Ko/;;^2 package NetFox; 90h1e7ZcC import java.io.*; :_QAjU import java.net.*; ^Im%D(MY uJ/?+5TU 9<(K6Q public class SiteFileFetch extends Thread { 8K JQ( +65~,e jl e%|8m&@ SiteInfoBean siteInfoBean = null; //文件信息Bean ci_v7Jnwo long[] nStartPos; //开始位置 Bpm5dT; long[] nEndPos; //结束位置 51ajE2+X& FileSplitterFetch[] fileSplitterFetch; //子线程对象 U_}A{bFG long nFileLength; //文件长度 sAD P~xvU
boolean bFirst = true; //是否第一次取文件 Y9@dZw%2 boolean bStop = false; //停止标志 Ij6Wz.* File tmpFile; //文件下载的临时信息 _]D#)-uv}C DataOutputStream output; //输出到文件的输出流 ;4/dk_~p] D"x$^6`c} //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) F@K*T2uh public SiteFileFetch(SiteInfoBean bean) throws IOException q~Q)'*m { d7_ g
u siteInfoBean = bean; 0n<(*bfW //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); iy.%kHC tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); @
Zgl> if(tmpFile.exists ()) 3gI[]4lRH { Z?~d']XD bFirst = false; e:GgA read_nPos(); ^`jZKh8)h } ;&W; else lR@i`)'?U { Hr<C2p^a nStartPos = new long[bean.getNSplitter()]; -wfRR>)d nEndPos = new long[bean.getNSplitter()]; io9xI3{ } # +QWi0B
InPy:} jqX@&}3@ >Z2,^5P{ } Rgfc29(8 =, C9O 3u?`q%Y-e public void run() y3KcM#[ { ra9cD"/J & //获得文件长度 s=nVoc{Yt //分割文件 ,h@R' f! //实例FileSplitterFetch mP)3cc5T //启动FileSplitterFetch线程 {KU. //等待子线程返回 znQ'm^ h try{ `j}_BW_ if(bFirst) _Vo)<--+I { 'Wf?elB+ nFileLength = getFileSize(); @Ge>i5q if(nFileLength == -1) oxMUW<gYd { kh<pLI >$h System.err.println("File Length is not known!"); $/, BJ/9 } Y[iDX# else if(nFileLength == -2) WG8iTVwx { y7M:b Uh System.err.println("File is not access!"); ?y>Y$-v/C } @3-,=x else a)_rka1( { l- 1]w$
y for(int i=0;i<nStartPos.length;i++) SY$J+YBLM { r)6uX nStartPos = (long)(i*(nFileLength/nStartPos.length)); >&<<8Ln } p| \%:# for(int i=0;i<nEndPos.length-1;i++) j!lAxlOX { y^mWG1"O nEndPos = nStartPos[i+1];
b(}Gm@# } N;Z`%& nEndPos[nEndPos.length-1] = nFileLength; *?^Z)C> } Sg. +`xww3 } e$Xq C5PmLiOHY> S]e j=6SP //启动子线程 d)04;[= fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; fjIcB+Z for(int i=0;i<nStartPos.length;i++) _e?q4>B)c { 4?>18%7& fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), I!$jYY2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Ic[}V0dk nStartPos,nEndPos,i); i<4>\nc Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); pKt-R07* fileSplitterFetch.start(); )YzH k ;( } XMN?;Hj> // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6o=qJ`m[? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1);
JJ/1daj // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ,&.W6sW nEndPos = " + nFileLength); Z0[)u_< // fileSplitterFetch[nPos.length-1].start(); )%iRZ\`f F>~ xzc JkSdLj //等待子线程结束 yaH
Trh% //int count = 0; -ajM5S=d* //是否结束while循环 IPl@ DH boolean breakWhile = false; dSOlD/c
6X@mPj[/ 10C 2= while(!bStop) 4meidKw] { u(pdP" write_nPos(); \C]i|]tl Utility.sleep(500); H+4=|mkQ breakWhile = true; {8^Gs^c
c `6a]|7|f U/T4i# for(int i=0;i<nStartPos.length;i++) xT9Yes& { H-eEhI(;O if(!fileSplitterFetch.bDownOver) ?mH@`c,fM { ],;D2]<s breakWhile = false; p+, 1Fi break; `%-4>jI9- } X^zYQ6t } hc-lzYS if(breakWhile) /635B*g break; 33Ssylno `IEq@Wr#$! v"z(JF //count++; IFiTTIlT0 //if(count>4) "'['(e+7 // siteStop(); =2^Vgc } u5Qp/ag?N `S"W8_m # v.L$7O System.err.println("文件下载结束!"); \'n$&PFe } X'cf&>h catch(Exception e){e.printStackTrace ();} u-m %=2 } Q`H#
fS~ B|cA[ \Ut6; //获得文件长度 wA?@v|,dZ public long getFileSize() nIf N" { 'UY[ap int nFileLength = -1; ]EB6+x!G try{ YecT 96% URL url = new URL(siteInfoBean.getSSiteURL()); ?qk@cKS HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7^ 4jcfJH httpConnection.setRequestProperty("User-Agent","NetFox"); g[/^cJHQ O$a#2p& *"1~bPl int responseCode=httpConnection.getResponseCode(); ; ;<J
x. if(responseCode>=400) l`SK*Bm~< { ./$
<J6-J processErrorCode(responseCode); 5^\m`gS return -2; //-2 represent access is error $fj])>=H } A2Q[%A M]c7D`%s YzVN2f!n String sHeader; "37*A<+f +H7y/#e+3 *5e<\{! for(int i=1;;i++) }04Dg' { S|HY+Z6n' //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Ba<ngG
! //Utility.log(in.readLine()); SU/G)&Mi sHeader=httpConnection.getHeaderFieldKey(i); ;t}'X[U if(sHeader!=null) z1F9$^ { &]w#z=5SXi if(sHeader.equals("Content-Length")) x8Q~VVZr { l$F_"o?&S@ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); l{8CISO* break; VSh !4z1 } bZiyapM } Y+FP else qYx!jA]O break; B$ui:R/ t } pjACFVMFX } zt?h^zf} catch(IOException e){e.printStackTrace ();} 0A.PD rM: catch(Exception e){e.printStackTrace ();} 2xDQ:=ec J==}QEhQ{ ?FN9rhAC Utility.log(nFileLength); ^\MhT)x B22b&0 [ a@B
=E return nFileLength; @:
Z#E[N H } {(;B5rs a2o.a2
cv= \g Z //保存下载信息(文件指针位置) EJ G2^DSS private void write_nPos() /9 pbnzn { X<Z(]`i try{ mmHJh\2v output = new DataOutputStream(new FileOutputStream(tmpFile)); V~85oUc\- output.writeInt(nStartPos.length); GA\2i0ow for(int i=0;i<nStartPos.length;i++) Twx{' S { H<,bq*@ // output.writeLong(nPos); Uj,g]e8e output.writeLong(fileSplitterFetch.nStartPos); *6XRjq^# output.writeLong(fileSplitterFetch.nEndPos); EY~7oNfc`R } !
tGiTzzp output.close(); UxeL
cUP } ABcBEv3 catch(IOException e){e.printStackTrace ();} [m\,+lG?)j catch(Exception e){e.printStackTrace ();} k{a)gFH
O } k d+l k: fWj@e"G e8{^f]5 //读取保存的下载信息(文件指针位置) G]-%AO{K private void read_nPos() 7%4.b7Q { 7,h3V=^)Q try{ Qwv '< DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 9\AS@SH{^T int nCount = input.readInt(); wlr Ign% nStartPos = new long[nCount]; VG)="g[%) nEndPos = new long[nCount]; uJY.5w for(int i=0;i<nStartPos.length;i++) S6GMUaR { #&V5H{ nStartPos = input.readLong(); [t{](- nEndPos = input.readLong(); .a:Z!KF } VD/&%O8n input.close(); 9<l-NU9 _ } 088C| catch(IOException e){e.printStackTrace ();} ^>^\CP] catch(Exception e){e.printStackTrace ();} B7!;]'&d } KzG_ << uf]Y^,2 E5gl ^Q?Z private void processErrorCode(int nErrorCode) 7/?DP wbx { "Hht
g: System.err.println("Error Code : " + nErrorCode); 9 ZGV%Tw } aM$=|%9/ wWTQ6~Y%d '0RRFO //停止文件下载 Ff<)4`J public void siteStop() r1G8]a gO { 4\ FP bStop = true; |'<vrn for(int i=0;i<nStartPos.length;i++) xl8#=qmCD fileSplitterFetch.splitterStop(); 5mavcle{4r sLi*SR 3u_oRs } @Dj:4 } c4 5?St //负责部分文件的抓取 @8zT'/$ **FileSplitterFetch.java dF
e4K" */ (;UP%H> package NetFox; )[jy[[K( g/#~N~& YBvd
q1 import java.io.*; ~C|,b" import java.net.*; E0YU[([G eu9w|g @6b[GekZ< public class FileSplitterFetch extends Thread { Q>=-ext}q *H"aOT^{ y9!:^kDI String sURL; //File URL ;Iq5|rzDn long nStartPos; //File Snippet Start Position K_#UZA< Y long nEndPos; //File Snippet End Position uNbIX:L, int nThreadID; //Thread's ID {y6C0A* boolean bDownOver = false; //Downing is over 5
`=KyHi:b boolean bStop = false; //Stop identical D0 ruTS FileAccessI fileAccessI = null; //File Access interface TsD;Kl1 v459},!P 3ji:O T public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException +
|C=ZU { ^f|<R8 ` this.sURL = sURL; -~O/NX this.nStartPos = nStart; o/1JO_41 this.nEndPos = nEnd; RZh}: nThreadID = id; X+iK<F$ fileAccessI = new FileAccessI(sName,nStartPos);//定位 &@6 GI< } g$w6kz_[ A(+:S"|@ Hf%_}Du /` public void run() e+@xsn3 { QNArZ6UQ while(nStartPos < nEndPos && !bStop) ,|pp67 { t$ZkdF J3=BE2L J=*K"8Qr try{ )GJP_*Ab URL url = new URL(sURL); Qh-4vy=r HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,I`_F, httpConnection.setRequestProperty("User-Agent","NetFox"); tD-gc''H String sProperty = "bytes="+nStartPos+"-"; _whF^g8 httpConnection.setRequestProperty("RANGE",sProperty); |<(t}}X Utility.log(sProperty); a$m_D!b~_ 9m8ee&, [Oy >R
InputStream input = httpConnection.getInputStream(); FT.@1/ ) //logResponseHead(httpConnection); ~`R1sSr" qq;b~ 3kW zvr\36 byte[] b = new byte[1024]; !ZrB^?sO int nRead; |$e:* while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) /U*yw5 { 4j3oT)+8 nStartPos += fileAccessI.write(b,0,nRead); rk,p!}FqL //if(nThreadID == 1) H]Wp%"L // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _7@z_i_c } ^i`*Wm@! h|p[OecG J]fS({(\I Utility.log("Thread " + nThreadID + " is over!"); |zpx)8Q bDownOver = true; :;4SQN{2
O //nPos = fileAccessI.write (b,0,nRead); yvxl_*Ds8 } A5XR3$5P catch(Exception e){e.printStackTrace ();} r1Z<:}ZwK } r)b<{u=] } {?i)K X^ D{C:d\ e)$ J^ ={} //打印回应的头信息 cy1jZ1) public void logResponseHead(HttpURLConnection con) doD>m?rig3 { TpP8=8_Lh for(int i=1;;i++) <AUWby," { /s[DI;M$o String header=con.getHeaderFieldKey(i); 'ere!:GJD if(header!=null) O&'/J8 //responseHeaders.put(header,httpConnection.getHeaderField(header)); Q4wc-s4RN Utility.log(header+" : "+con.getHeaderField(header)); lLCdmxbT else 254~:eB0 break; 8i:[:Z } a)9rs\Is{ } 16$y`~c-z &p"(- 3hS6jS public void splitterStop() l h/&__ { M<[?g5=# bStop = true; CgnXr/!L } %MJ;Q?KB 8#59iQl d+}k g } (1){A8=?o 3k'.(P|F A1A3~9HuK /* 84M3c **FileAccess.java CLN+I'uX0 *//文件访问(定位,写) %S#WPD'Y package NetFox; >&Fa(o;* import java.io.*; Vk7=7%xW Q6^x8 ;&?pd"^<_Z public class FileAccessI implements Serializable{ A/ 0qk ?63&g{vA //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 \##`pa(8 RandomAccessFile oSavedFile; +v15[^F long nPos; Q2\ ~L4eZ D;js.ZF public FileAccessI() throws IOException Y\?j0X; { arh@`'Q this("",0); @E_zR } ^ vbWRG~ 2F?kjg, n`L,]dco public FileAccessI(String sName,long nPos) throws IOException h0VzIuV { uD)-V;}P@; oSavedFile = new RandomAccessFile(sName,"rw"); a$}mWPp+f this.nPos = nPos;
W9R`A oSavedFile.seek(nPos); o^ h(#%O } _V@P-Ye #WufZ18# '6zd;l9Z public synchronized int write(byte[] b,int nStart,int nLen) 2u:4$x8 { -<W2PY< int n = -1; m0( E kK try{ #Lka+l;L7 oSavedFile.write(b,nStart,nLen); i'tp1CI n = nLen; SRz&Nb } TzM=LvA catch(IOException e) 2QayM?k8 { \G;CQV#{9 e.printStackTrace (); 7g6RiH} } L11L23: -M61Mw1 LprM ;Q_ return n; =!
mJG } ,Y!zORv<7 @ajM^L!O 9]$`)wZ } :vQM>9l7 0Nr\2| kuS/S\Z5K /* 3Gd0E;3sk~ **SiteInfoBean.java I@./${o */ }uQ${]&D package NetFox; Do;#NLrWb =nhzMU9c\y JO1
,TtA public class SiteInfoBean { Ew4g'A:H x9V {R9_gf 5py R~+ private String sSiteURL; //Site's URL |.w;r
private String sFilePath; //Saved File's Path arj$dAW private String sFileName; //Saved File's Name Q}P-$X+/ n private int nSplitter; //Count of Splited Downloading File j Z'&0x"U - L~Uu^o Tf-CEHWD public SiteInfoBean() uec|S\~M {//nSplitter的缺省值为5 }lfn0 %(@ //default value of nSplitter is 5 %v4
[{ =fE this("","","",5); \ 4gXY$`@ } MUcNC\`z 7rIlTrG nW5K[/1D public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ]Oso#GYD { >saI+u'o sSiteURL= sURL; h4 vm{ho sFilePath = sPath; ~:2K#q5C sFileName = sName; 8:{q8xZ=k this.nSplitter = nSpiltter; tWk{1IL zM59UQU; A&N*F "q } Sdc*rpH"( }O*WV 1 V/bH^@,sA public String getSSiteURL() ~`Sle
xK|} { C1QWU5c v return sSiteURL; j>!sN`dBj } Kbas-</Si \"d?=uFe ?}sOG?{ public void setSSiteURL(String value) o#e7,O { j'Wp sSiteURL = value; SE!L : } e1P7
.n} 7a<_BJXx xNgt[fLpS public String getSFilePath() n`<U"$* { (,LL[&;: return sFilePath; M 9"-WIG@h } 2Xgx*'t\ NG9vml d@g2k> > public void setSFilePath(String value) #F4X} { |s|/]aD}o sFilePath = value; YMu) } a8JN19}D }W}G X(?P Y/P]5: =h public String getSFileName() ,qy&|4Jz { WQt5#m; W return sFileName; %fpsc_ } =pp:j`B9( Z#7U
"G-A F^rl$#pCS public void setSFileName(String value) AgsR-"uh { Zh,]J ` sFileName = value; p&5S|![\ } 1+^n!$ $L&BT 0 AbZ:(+@cP public int getNSplitter() XV5`QmB9 { U;gp)=JNT return nSplitter; 4$Pr|gx } /*P7<5n0 -f.R#J$2 .Cr1,Po public void setNSplitter(int nCount) &<h?''nCy { o+^Eu}[. nSplitter = nCount; vYzVY\ } %#9P?COs&W } ~4 ^p}{ @1.9PR$x ]fC7%"nB /* ][t6VA **Utility.java owMmCR */ & rQD `E/ package NetFox; |EeBSRAfe o7arxo\ D3.VXuKn6 public class Utility { V}:'Xgp*N ;+/NjC1 1;`Fe":;vC public Utility() CJA+v- { KZ3B~#oQ w \DspF \G3!TwC% } [B,p,Q" 2 `&<bt[g //线程睡眠 dXO=ZU/N public static void sleep(int nSecond) CWvlr nv { n?Z f/T try{ Y)OBTX Thread.sleep(nSecond); M5u_2;3 } o=mo/N4 catch(Exception e) wA",SBGX { B^m!t7/, e.printStackTrace (); M[z3 f } xgs@gw7!n0 } yjd(UWE Y Z\@)D; //日志 GBr,LN public static void log(String sMsg) nNs .,J) { [`9^QEj System.err.println(sMsg); *;X-\6 } `sxN!Jj? Nm"<!a<F C9pnU,[ public static void log(int sMsg) N(BiOLZL6 { j%5a+(H,z; System.err.println(sMsg); en%B>]QI } J7m`]!*t } ?\M)WDO mR,O0O}& ]|y}\7Aa /* a7=YG6[ **TestMethod.java {\Ys@FF */ @E(P9zQ/zy package NetFox; V" }*"P-% 6lZGcRO WP!il(Gr public class TestMethod { F-tFet
Se/ss!If 9.]kOs_ public TestMethod() ,\}k~ U99 { ///xx/weblogic60b2_win.exe ()B7(Y try{ 9R>~~~{-Go SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); r},lu=em //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); + "zYn!0 SiteFileFetch fileFetch = new SiteFileFetch(bean); S[sr'ZW fileFetch.start(); }{t3SGs J } <K,[sy&Qy catch(Exception e){e.printStackTrace ();} B6uRJcD4 !^-OfqIHfV ]f5c\\) } &~}@u[=ux S[^nSF zQt1;bo public static void main(String[] args) u`+'lBE, { v!KJ|c@m new TestMethod(); }Q;BQ2[ } G}q<{<+$ } q55M8B 4w 点击下载更多相关资料
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