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/* |bM?Q$>~ **SiteFileFetch.java ^}{`bw {
*/ ]nQC package NetFox; -LnNA`- import java.io.*; -]-?>gkN5 import java.net.*; `at>X&Ce, AnW72|=A( u 6"v}gN public class SiteFileFetch extends Thread { nuucYm%IF- !]l!I9 )zMsKfQ SiteInfoBean siteInfoBean = null; //文件信息Bean |9;MP&68 long[] nStartPos; //开始位置 qN@-H6D1= long[] nEndPos; //结束位置 _yu_Ev}R FileSplitterFetch[] fileSplitterFetch; //子线程对象 }~bx==SF6! long nFileLength; //文件长度 1=^edQ+ boolean bFirst = true; //是否第一次取文件 BIn7<.& boolean bStop = false; //停止标志 ][[\!og File tmpFile; //文件下载的临时信息 -udKGrT+ DataOutputStream output; //输出到文件的输出流 nB.u5 B4/\RC2 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Z]\IQDC public SiteFileFetch(SiteInfoBean bean) throws IOException ?>}&,:U} { MVYf-'\^ siteInfoBean = bean; 5n#@,V.O/ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); a'prlXr\4 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); IS[&V&.n if(tmpFile.exists ()) -+H?0XN { "l7))>lL bFirst = false; dp=#|!jc read_nPos(); G@+AB*Eu } Lk8NjK6 else 8EC$p} S { O@)D%*;v nStartPos = new long[bean.getNSplitter()]; &"/IV$H nEndPos = new long[bean.getNSplitter()]; 0'nY } c%O8h .G/2CVMj ,nnVHBN `ZLA=oD } ;z3w#fNMv tEC`->| Xt%>XP public void run() WVkJ=r0Ny { ;qwNM~ //获得文件长度 >ZjGs8& //分割文件 8^U+P% //实例FileSplitterFetch YgCSzW&( //启动FileSplitterFetch线程 cd-;?/ //等待子线程返回 TD"w@jBA try{ "i1r9TLc if(bFirst) meM61ue_2 { KU5|~1t 4 nFileLength = getFileSize(); )m4O7'2G if(nFileLength == -1) o?]g { 9+"\7MHw System.err.println("File Length is not known!"); mq!_/3 } W%&'EJ)62 else if(nFileLength == -2) zZ})$Ny( { !-<PV System.err.println("File is not access!"); !^*-]p/z } WY`hNT6M else oHvVZ { $9In\x
for(int i=0;i<nStartPos.length;i++) \Bg?QhA_D { `xm4?6 nStartPos = (long)(i*(nFileLength/nStartPos.length)); j ?gscQ3 } Q4!6|%n8v for(int i=0;i<nEndPos.length-1;i++) Smjg[ { 48t_?2> nEndPos = nStartPos[i+1]; =j$!N# L } /GDGE } nEndPos[nEndPos.length-1] = nFileLength; ET:B" } Q?7:XbN } B(l8&
GT(nW|v C?h`i ^ >2 //启动子线程 UW@BAj@^@ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; #nS[]UbwZ for(int i=0;i<nStartPos.length;i++) 0*umf.R { xZpGSlA fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %^VQw! siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 9p '#a: nStartPos,nEndPos,i); szG 0?e Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *LZ^0c: r fileSplitterFetch.start(); vi-mn)L6# } n>[" h2 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =3=
$F% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); @ApX43U( // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", A=a~ [vre nEndPos = " + nFileLength); -|\SNbPTV // fileSplitterFetch[nPos.length-1].start(); r@9qjva InCo[ 8SI \Tii
S //等待子线程结束 4Bc< //int count = 0; %J%ZoptY: //是否结束while循环 8/16<yZ boolean breakWhile = false; &:MfLDJ @*{sj`AS
' F>!gwmn~ while(!bStop) )VoQ/ch< { <6L=% \X{* write_nPos(); ;;cPt44s Utility.sleep(500); qZ79IX'y breakWhile = true; bo%v( oY$L fj,]dQT for(int i=0;i<nStartPos.length;i++) <z+b88D { M(+;AS?; if(!fileSplitterFetch.bDownOver) 0*-nVC1 { RxZ#`$F breakWhile = false; 3$hbb6N%6. break; gY=Ry=w9 } nL[zXl } sHwn,4|iY if(breakWhile) .xIu break; 5PXo1"n8T ./!6M _s> ZY0 //count++; }[%d=NY //if(count>4) ])YGeY(V0+ // siteStop(); m=7Z8@sX}, } vKCgtk J|D$ ^& R
H]q System.err.println("文件下载结束!"); "BAH=ul5E } y?1<7>L5~ catch(Exception e){e.printStackTrace ();} QxjX:O } nR()ei^X /e0cx:.w qauZ-Qoc9 //获得文件长度 :1O1I2L0 public long getFileSize() /V%]lmxQ { Z;XiA<| int nFileLength = -1; AvNU\$B4aG try{ <P"4Mk7`s URL url = new URL(siteInfoBean.getSSiteURL()); ;& PK6G HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); yXdJ5Me(T httpConnection.setRequestProperty("User-Agent","NetFox"); G L> u3K 5cza0CriJ RC']"jpW int responseCode=httpConnection.getResponseCode(); xn)eb#r if(responseCode>=400) l`}Ag8Q { $)fybnY processErrorCode(responseCode); EC6Q<&]Iw return -2; //-2 represent access is error 1p[Z`m*9 } dT9ekNQB 5r$X +z2+z String sHeader; .PhH|jrCW^ -#nfO*H}
ERE1XOe=D for(int i=1;;i++) jW G=k#WN { /W,K% s] //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); `S{Blv //Utility.log(in.readLine()); R1%2]? sHeader=httpConnection.getHeaderFieldKey(i); 22<T.c if(sHeader!=null) u?>]C6$ { v\UwL-4[ if(sHeader.equals("Content-Length")) vj23j[!| { Q.8)_w nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); $YM6}D@ break; +C(v4@=nd } 4p%=8G| } bBFdr else !w[io; break; :Gdfpz-{? } us^2Oplq< } N{f4-i~ catch(IOException e){e.printStackTrace ();} u*<G20~A catch(Exception e){e.printStackTrace ();} K^_Mt!% jb~/>I^1 H$/r{gfg^ Utility.log(nFileLength); A?q9(n|A" nv9kl Q@ +cw;a]o^> return nFileLength; sPee"9%, } }5)sS}C SgOn:xg;3L Z!qH L$ //保存下载信息(文件指针位置) i'Oh^Y)E# private void write_nPos() j3W)5ZX { E!eBQ[@ try{ UBUZ}ZIbN output = new DataOutputStream(new FileOutputStream(tmpFile)); pzMli^ output.writeInt(nStartPos.length); y'9
bs for(int i=0;i<nStartPos.length;i++) &m'ttUG? { ?d -$lI // output.writeLong(nPos); dtdz!'q)Y output.writeLong(fileSplitterFetch.nStartPos); ~\9bh6%R output.writeLong(fileSplitterFetch.nEndPos); CS:mO| } "z^&>#F output.close(); !lf:x } zLs[vg.( catch(IOException e){e.printStackTrace ();} }/%(7Ff{ catch(Exception e){e.printStackTrace ();} 2{!^"iW } 4gTD HQP QX*HvT 8G>;X;W //读取保存的下载信息(文件指针位置) l+>&-lX' private void read_nPos() ?T\m
V} { I.<>6ISI@ try{ 0#}@-e DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 6E!C xXUX int nCount = input.readInt(); Q&Rj)1! nStartPos = new long[nCount]; 0nF>E@ j^[ nEndPos = new long[nCount]; mxYsP6& for(int i=0;i<nStartPos.length;i++) 2[\I{<2/9 { 7DU"QeLeb nStartPos = input.readLong(); qq&G~y nEndPos = input.readLong(); rf% E+bh4 } ,Z7tpFC input.close(); ?s<'3I{F` } dnby &-+T catch(IOException e){e.printStackTrace ();} BVx: JiA catch(Exception e){e.printStackTrace ();} %C]K`=vI- } .Qpqbp 8 HqW| kQRkby private void processErrorCode(int nErrorCode) X^PR];V:$ { HS|X//] System.err.println("Error Code : " + nErrorCode); N{]|!# } {e4ILdXM f!`,!dZgkd n')#]g0[ //停止文件下载 EV:y} public void siteStop() ("t;
2Mw { c1IK9X* bStop = true; u3 mTsq! for(int i=0;i<nStartPos.length;i++) o9!DK fileSplitterFetch.splitterStop(); UGy~Ecv vG'JMzAm <t{T]i+ } v'C`;I } rNL*(PN}lO //负责部分文件的抓取 U!"+~d) **FileSplitterFetch.java ,6Kx1 c */ 9HOdtpQOV package NetFox; BfLh%XC Y&O<A8=8 I9ga8mG4-' import java.io.*; M]?#]3XBNo import java.net.*; "+js7U- Bv^{|w P`'Nv public class FileSplitterFetch extends Thread { Nb[z+V{= 7Q<xC 3*G7H String sURL; //File URL .1u"16_ long nStartPos; //File Snippet Start Position <;d?E%` long nEndPos; //File Snippet End Position Kq|L:Z int nThreadID; //Thread's ID GM6Y`iU boolean bDownOver = false; //Downing is over y ?FKou' boolean bStop = false; //Stop identical %f.(^<Gu FileAccessI fileAccessI = null; //File Access interface V4GcW|P4y eKlh }v 0k I.dX) public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException bJD2c\qoc { TxYxB1C) this.sURL = sURL; #c V_p this.nStartPos = nStart; }bG|(Wp9 this.nEndPos = nEnd; nT0FonK> nThreadID = id; @0q%&v0 fileAccessI = new FileAccessI(sName,nStartPos);//定位 o$4n D#P3 } L Ty[) bz[+g,e2oA Be{7Rj v public void run() X I\zEXO { {]~b^=qE$ while(nStartPos < nEndPos && !bStop) uE~? 2G { odPq<'V|AY [-cYFdt"V &N!QKrj3 try{ 317Lv
\[ URL url = new URL(sURL); 4/$ $?w4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); v\#69J5.>) httpConnection.setRequestProperty("User-Agent","NetFox"); oB:tio4DE String sProperty = "bytes="+nStartPos+"-"; F/[vg httpConnection.setRequestProperty("RANGE",sProperty); ^'=J'Q Utility.log(sProperty); c+/SvRx^> NZ/>nNs RsS?ibozl InputStream input = httpConnection.getInputStream(); SrfDl* //logResponseHead(httpConnection); D+/27# tY<D\T rrei6$H& byte[] b = new byte[1024]; NAjK0]SRY int nRead; y&NO[ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) =$UDa`}D { Kw}-<y nStartPos += fileAccessI.write(b,0,nRead); 4,kT4_&, //if(nThreadID == 1) Z |uII#lq // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 'G3B02* } :tY;K2wDM LuS]D% IiV:bHUE}0 Utility.log("Thread " + nThreadID + " is over!"); p%_#"dkC7 bDownOver = true; F{\MIuoy //nPos = fileAccessI.write (b,0,nRead); -.:[a3c? } g4<w6eB catch(Exception e){e.printStackTrace ();} dOArXp`s } +1Oi-$
2- } [G^ir $VYMAk&\ `#hdb=3 //打印回应的头信息 NrVrR80Y public void logResponseHead(HttpURLConnection con) WC,&p { *upl*zFf0 for(int i=1;;i++) f{[U->#^ { s4bLL String header=con.getHeaderFieldKey(i); T_O\L[]p* if(header!=null) MV5'&" ,oB //responseHeaders.put(header,httpConnection.getHeaderField(header)); s{#ZRmc2B Utility.log(header+" : "+con.getHeaderField(header)); ++-\^'&1 else 0n+Wv@/ break;
M@S6V7 } CF3Z`xD } }wrZP}zM> ,{A-<=6t ;JMd(\+- public void splitterStop() j"*ZS'0 { mXT{)pU bStop = true; G<,@|6"w } f_X]2in r'M|mQ$s> F MB\$(g } oop''6`C% IC>OxYg* 306C_M\$ /* CXGq>cQ=d **FileAccess.java u1O?` *//文件访问(定位,写) E~]8>U?V package NetFox; ^HumyDD6 import java.io.*; ^EE3E' Y[9x\6
_E RG-pN() public class FileAccessI implements Serializable{ ~sk ;6e)(2 ]Qe;+p9vU //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 B\1F RandomAccessFile oSavedFile; g<O*4
]= long nPos; -Y%#z'^- {XiBRs e ncf=S(G+ public FileAccessI() throws IOException )s(J8J[b*L { ,Khhu%$ this("",0); N7k<q=r- } *xXa4HB y%
=nhV nY"9"R\.= public FileAccessI(String sName,long nPos) throws IOException @47MJzC { ^ Afq)26D oSavedFile = new RandomAccessFile(sName,"rw"); |&WeXVH E this.nPos = nPos; 7. 9n oSavedFile.seek(nPos); ;|e {J$ } qYc]Y9fi 72@raA#y \k_0wt2x1 public synchronized int write(byte[] b,int nStart,int nLen) :<4:h.gO8 { FW(y#Fmqs int n = -1; rVq=,>M9 try{ T1c2J,+}R oSavedFile.write(b,nStart,nLen); mw";l$Aq} n = nLen; C,+6g/{ } nJ |O,*`O catch(IOException e) T;X8T { X64OX9:YF e.printStackTrace (); [TvH7ott'1 } X*VHi R:kNAtK \ Xow#@[ return n; E6|!G } >tXn9'S O79;tA<k F@4XORO; } KB!.N[!v My0h9'K u{xjFx- /* O=
PFr" **SiteInfoBean.java 0{g @j{Lbz */ I^sWf3'db package NetFox; TDXLxoC? "&%:
9O 5*~Mv<# public class SiteInfoBean { $8h^R# }C.M4{a\ W@v@|D@ private String sSiteURL; //Site's URL 4thLK8/c5g private String sFilePath; //Saved File's Path q3Re
F_ private String sFileName; //Saved File's Name p*)RP2 private int nSplitter; //Count of Splited Downloading File uhvmh N r5
aU6] jC>l<d_ public SiteInfoBean() rXXIpQRi$S {//nSplitter的缺省值为5 [,)yc/{* //default value of nSplitter is 5 De,4r(5 this("","","",5); @=q,,t$r } Vd^_4uqnV 5f2ah4 g t_ 5b public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) cy8+@77 { .f
4a+w sSiteURL= sURL; }q9;..oL sFilePath = sPath; "ut:\%39. sFileName = sName; 68?oV)fE this.nSplitter = nSpiltter; 4a]m=]Hm 4&;.>{:; B8-v!4b0` } zlzr;7m N8|=K_;& hM\<1D
CKG public String getSSiteURL() CLU !/J$! { {^gbS return sSiteURL; AEaT } &WAO.*:y x"h0Fe?J :" Q!Q@> public void setSSiteURL(String value) j|gv0SI_
w { iaO;i1K5U sSiteURL = value; ,
"w`,c>! } V0+D{|thh6 f)hs>F flp<QT public String getSFilePath() D7cOEL< { z!27#gbL return sFilePath; aCzdYv\} & } ""l_&3oz <y1V2Np LcCb[r public void setSFilePath(String value) +cv7] { ;Vc@]6Ck sFilePath = value; 6dQa|ACX_ } Icf 4OAx #+Z3!VS 2xRb$QF public String getSFileName() uV.3g 1m
{ ?PORPv# return sFileName; eA9U|&o } <Ur(< WTV E< nXkqD v<iMlOEt public void setSFileName(String value) >ijFQ667>j { yO.3~H)c sFileName = value; +;SQ}[ } o<P@:}K a*JM2^,HO |,M&ks public int getNSplitter() r*]0PQ{? { lQQXV5NV return nSplitter; x bF*4;^SI } ;;'b;,/ Ry*NRP; -}|GkTM public void setNSplitter(int nCount) OD<0,r0f, { tdg.vYMDPC nSplitter = nCount; W Da;wt } I7b(fc-r } ZxkX\gl91 ,t5X'sY L *9)7.}uY /* 'Y3>+7bI **Utility.java _.0c~\VA */ aVvi_cau package NetFox; p'1n'|$e E 5}T_~-{ Im%|9g;P public class Utility { UI|L;5 ie+&@u <b"ynoM.A public Utility() P;0tI; { c.jq?Q k 8}h ^Frh h-h U=I8 } hKjvD.6]% 6'ye-}vD- //线程睡眠 ;`g\T u public static void sleep(int nSecond) Pi::cf>3 { Yu=4j9e_mG try{ -H~g+i*J Thread.sleep(nSecond); >R3~P~@30 } _H^Ij catch(Exception e) x-+[gNc
6 { vFY/o,b \ e.printStackTrace (); pW O-YZ#+ } D4'"GaCv } mtuq g(<02t!OT= //日志 m3XL;1y:a public static void log(String sMsg) B#o(21s { Dr6"~5~9w System.err.println(sMsg); V[,/Hw~d% } WpC@nz? 3P Twpq1 "lLt=s2>L public static void log(int sMsg) zNRoFz. { (u85$_C System.err.println(sMsg); K1uN(T.Ju } 6,M>' s,N } w_G/[R3 ,$5; @va{&i`%A7 /* ZmO/6_nU? **TestMethod.java ?6Cbx6 */ Gdnk1_D> package NetFox; wE3^6 ba|x?kz )/2* <jr public class TestMethod { R0+v5E AC ,$(E 4?M=?K0 public TestMethod() Mo
&Ia6^ { ///xx/weblogic60b2_win.exe #O]F5JB try{ &w:"e'FG` SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 0:Js{$ZL4 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); "-XL Y_ SiteFileFetch fileFetch = new SiteFileFetch(bean); aAO[Y"-:,Y fileFetch.start(); qhVDC } KL*ZPKG catch(Exception e){e.printStackTrace ();} N^q*lV#kob +xRja(d6 3O%[k<S\VO } liFNJd`|o+ G,>tC`! /a17B public static void main(String[] args) =sedkrM { 8<3J!X+ new TestMethod(); _Pa(5-S'KR } D9e"E1f+" } }r`!p5\$K0 点击下载更多相关资料
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