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/* (xfc_h*xA **SiteFileFetch.java iLy^U*yK */ zMSwU]4I! package NetFox; cYSn
import java.io.*; K=gg <E< import java.net.*; q[s,q3n~ .p[uIRd` +( LH!\{^ public class SiteFileFetch extends Thread { 'uu*DgEr ]#o;`5' @Jd&[T27Lr SiteInfoBean siteInfoBean = null; //文件信息Bean 9UM)"I&k long[] nStartPos; //开始位置 '2^}de!E long[] nEndPos; //结束位置 /~,*DH$) FileSplitterFetch[] fileSplitterFetch; //子线程对象 HPtMp#`T long nFileLength; //文件长度 lR?y
tIY boolean bFirst = true; //是否第一次取文件 \K$\-]N+ boolean bStop = false; //停止标志 LUQ.=:mBR File tmpFile; //文件下载的临时信息 g QBS#NY DataOutputStream output; //输出到文件的输出流 xlv(PVdn zyPb\/ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 72l:[5ccR public SiteFileFetch(SiteInfoBean bean) throws IOException b7.7@Ly
y { [UwQi!^-O siteInfoBean = bean; $0V+< //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); d+DO}=] tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); h8/tKyr8( if(tmpFile.exists ()) WJ8i=MO67 { bF _]j/ bFirst = false; "(=g7,I4 read_nPos(); dA<%4_WZty } ?o(284sV3 else S)hDsf.I { 6FDj :~ nStartPos = new long[bean.getNSplitter()]; -mO#HZ Iq nEndPos = new long[bean.getNSplitter()]; k|OM?\ } gP>pbW_ !Q\*a-C zY/Oh9`=v '{WEyhaS } +.Vh<:? EMnz;/dMt )M;~j public void run() JWHsTnB { 82FEl~,^E //获得文件长度 l2;$qNAo //分割文件 QtfL'su: //实例FileSplitterFetch GP+=b:C{E //启动FileSplitterFetch线程 YT-ua{.^ //等待子线程返回 gw)z*3]~s try{ =cRmaD if(bFirst) &en2t=a { T"99m^y nFileLength = getFileSize(); 'jO2pH/% if(nFileLength == -1) <,$*(dX)( { _1)n_P4 System.err.println("File Length is not known!"); >V8!OaY5n } |6^a[x3/U else if(nFileLength == -2) xD*Zcw(vj~ { %3dc_YPS System.err.println("File is not access!"); ~6=6YP } MR|A_e^x else l!}gWd,H { R:n|1]*f3X for(int i=0;i<nStartPos.length;i++) uKzx >\}?1 { `IlhLv nStartPos = (long)(i*(nFileLength/nStartPos.length)); hqeknTGsIn } F3V:B.C for(int i=0;i<nEndPos.length-1;i++) $m
;p@#n { kKRu]0J~[ nEndPos = nStartPos[i+1]; 0#GnmH } KLj/,ehD
! nEndPos[nEndPos.length-1] = nFileLength; q|lP?-j } {)Zz4 } 5M>SrZH PJKxh%J *|+$7j //启动子线程 k9y/.Mu fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; O" [#g for(int i=0;i<nStartPos.length;i++) DM,;W`|6% { je:J`4k$ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /HSg) siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), |f}`uF nStartPos,nEndPos,i); 93.L887
Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 1JGww]JZo fileSplitterFetch.start(); F9IPA% } ;$r!eFY; // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), s BuXwa siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); .?F`H[^)^u // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Yk7^?W nEndPos = " + nFileLength); >u`Ci>tY // fileSplitterFetch[nPos.length-1].start(); m}m|(;T %CrpUx Pi[(xD8 //等待子线程结束 DY87NS*HF //int count = 0; ]V"B`ip[2 //是否结束while循环 0w$1Yx~C boolean breakWhile = false; yAJrdY" )B^T7{ ;4vx+> - while(!bStop) ZN;fDv { y|#Fu write_nPos(); W$R@Klz Utility.sleep(500); P9# }aw+ breakWhile = true; y(r(q |uA /72 l'\m'Ioh for(int i=0;i<nStartPos.length;i++) qS[nf>" { M`G#cEc if(!fileSplitterFetch.bDownOver) e({-.ra { sGJZG breakWhile = false; z0tm3ovp break; 5bprhq-7 } <(o) * Zmo } (M t-2+"+ if(breakWhile) l9$"zEC break; Z
uO
7N safI`bw1 ^{+_PWn //count++; O ;B[ZMV //if(count>4) 5q.)K
f+ // siteStop(); A!`Q[%$ } p w`YMk <a%RKjQvT y gTc
Y System.err.println("文件下载结束!"); $[*<e~? } oei2$uu catch(Exception e){e.printStackTrace ();} 6t`cY } .|3&lb6 'WJ3q|o/
j |ZhGerp //获得文件长度 #uH%J<U public long getFileSize() 5*Y(%I< { $2pkh% int nFileLength = -1; =E-V-?N\ try{ .0'FW!;FV URL url = new URL(siteInfoBean.getSSiteURL()); 5'[b:YC HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); N> xdX5 httpConnection.setRequestProperty("User-Agent","NetFox"); Yhte&,D" h?'~/@ @L$!hTaP int responseCode=httpConnection.getResponseCode(); Q@KCODi if(responseCode>=400) ( 4(," { /]oQqZHv processErrorCode(responseCode); 1]69S( return -2; //-2 represent access is error VYjt/\Z } {B-*w%}HU lHAWZyO 8W Etm} String sHeader; `I.pwst8i- Vh{(*p <*(^QOM for(int i=1;;i++) $[UUf}7L { O,JS*jXl //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); _\na9T~g //Utility.log(in.readLine()); ;5DDV6 sHeader=httpConnection.getHeaderFieldKey(i); :V1j*) if(sHeader!=null) 1mD)G55Ep { z]7 /Gc,j if(sHeader.equals("Content-Length")) [5!dO\-[ { k%BU&%?1 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); j#0JD!Vr break; @VPmr}p:{ } XO+rg&Pu } >n^780S| else C;j&Vbf break; &r\8VEZq" } M*f]d`B } Evd|_ W- catch(IOException e){e.printStackTrace ();} -n8d#Qm) catch(Exception e){e.printStackTrace ();} A,BYi$ `BVmuUMm ^=5x1<a9$ Utility.log(nFileLength); <z\ `Ma tj$[szo g(Q1d-L4e return nFileLength; _ OC@J*4. } Z"RgqNf U(#JC(E-# 1X&.po //保存下载信息(文件指针位置) >
K?OsvX private void write_nPos() 1[T7;i$ { H>A6VDu try{ 4M|uT
9- output = new DataOutputStream(new FileOutputStream(tmpFile)); P:t .Nr" output.writeInt(nStartPos.length); A&bj l[s for(int i=0;i<nStartPos.length;i++) 9 @xl{S- { ddyX+.LMk // output.writeLong(nPos); e"52'zAV- output.writeLong(fileSplitterFetch.nStartPos); &iVdqr1, output.writeLong(fileSplitterFetch.nEndPos); fjVy;qJ32S } L- !1ybB^ output.close(); 8'HS$J;C } B+snHabS6 catch(IOException e){e.printStackTrace ();} msM1K1er catch(Exception e){e.printStackTrace ();} tw>2<zmSi% } dWPQp*f2 ,_fz)@) hg(<>_~ //读取保存的下载信息(文件指针位置) m^G(qoZ] private void read_nPos() #5Z`Q^ { =y4dR#R(\ try{ !6T"J!F# DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 0n}13u=} int nCount = input.readInt(); r~lZ8$KC nStartPos = new long[nCount]; `(sb nEndPos = new long[nCount]; w_xca( for(int i=0;i<nStartPos.length;i++) 12KC4,C&1i { `;E/\eG" nStartPos = input.readLong(); LmePJ nEndPos = input.readLong(); |zYOCDFf } 6t6Z&0$h~ input.close(); 6(Pan% } _!R$a- catch(IOException e){e.printStackTrace ();} x8PT+KC catch(Exception e){e.printStackTrace ();} 6!ve6ZB[p } yZ|"qP1 ^Tm`motzh 2gPqB*H private void processErrorCode(int nErrorCode) (~=.[Y { (Q^sK\ System.err.println("Error Code : " + nErrorCode); l%0bF9\ } rp||#v0l!w hj [77EEz d,V#5l-6 //停止文件下载 :$MOdL[ir public void siteStop() Y$ys4X { &X$T "Dp bStop = true; ~#A}=,4> for(int i=0;i<nStartPos.length;i++) Z<-_Y]4j fileSplitterFetch.splitterStop(); Nr~$i% [ $J`O-"M
r9i?H } Wwq:\C } `Y#At3{ //负责部分文件的抓取 =
xO03|T;6 **FileSplitterFetch.java <Xf6?nyZ( */ !8{VLg package NetFox; zj
6I:Qr _y@28t v88vr import java.io.*; ]a $6QS import java.net.*; vygzL U^ 2qMiX|Y asWk]jjMG public class FileSplitterFetch extends Thread { DUp`zW;B [FFr}\}bY L2}\Ah"[ String sURL; //File URL 'Wlbh:=$ long nStartPos; //File Snippet Start Position i8iT}^ long nEndPos; //File Snippet End Position A*JOp8\) int nThreadID; //Thread's ID f|[7LIdh- boolean bDownOver = false; //Downing is over l;?:}\sI= boolean bStop = false; //Stop identical qu=~\t1[6 FileAccessI fileAccessI = null; //File Access interface TdhfX {nk f:o.[4p2 |9*Rnm_ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException -y`Pm8 { jqUVERbc this.sURL = sURL; Z@~gN5@,M this.nStartPos = nStart; r,5e/X this.nEndPos = nEnd; &l(T},-X nThreadID = id; ak(s@@k fileAccessI = new FileAccessI(sName,nStartPos);//定位 <=(K'eqC^ } 7e_4sxg'(3 #S>N}<> |J$A%27 public void run() u[a-9^&g { {^]qaQ[5N while(nStartPos < nEndPos && !bStop) D
T5d]MU { \!ZA#7 "~r<ZG 1+%UZK= K try{ z#{Y>.b URL url = new URL(sURL); X5WA-s(?0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Hav &vV httpConnection.setRequestProperty("User-Agent","NetFox"); j{C~wy!J String sProperty = "bytes="+nStartPos+"-"; $tlBI:ay1 httpConnection.setRequestProperty("RANGE",sProperty); l)r\SE1 Utility.log(sProperty); h#1:ypA6l }Qo]~/ 0\mf1{$"!7 InputStream input = httpConnection.getInputStream(); ys=2!P-[# //logResponseHead(httpConnection); Q%CrB>|@ HT7,B(.} 'o='Q)Dk byte[] b = new byte[1024]; a1,)1y~ int nRead; Tzd#!Lvm:, while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) :tWkK$ { \Z.r Pq nStartPos += fileAccessI.write(b,0,nRead); 2Z; !N37U //if(nThreadID == 1) >s<Bu' r // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Wvb ~j } ,e'r 0 uc9h}QJ* D;sG9Hky Utility.log("Thread " + nThreadID + " is over!"); &Wy>t8DIK bDownOver = true; lhM5a
\ //nPos = fileAccessI.write (b,0,nRead); +S+!:IB } $YJ 1P catch(Exception e){e.printStackTrace ();} 8P]nO+ } Sr+hB>{ } p,=IL_ G
1{m" 1M hUpour
|b //打印回应的头信息 q:_:E*o public void logResponseHead(HttpURLConnection con) e;v7!X { u.E>d9 for(int i=1;;i++) ?C CQm { drpx"d[c String header=con.getHeaderFieldKey(i); 5$
How! if(header!=null) ts=D //responseHeaders.put(header,httpConnection.getHeaderField(header)); V 2Xv) Utility.log(header+" : "+con.getHeaderField(header)); Zzlt^#KLx else ,b^Y8_ltoT break; mN-O{k0\ } lP=,|xFra } uj;iE
9 6Takx%U aP (~l_ public void splitterStop() }<kl3{) { Wrbv<8}%c bStop = true; pPxgjX } $Ptl&0MN% DK2Wjr; q'fOlq } C!_=L?QT^ ipG 0ie+ ZYB5s~;eB" /* J_a2DM6d **FileAccess.java ZYY`f/qi *//文件访问(定位,写) .WeSU0XG package NetFox;
6x5Q*^w import java.io.*; 3]iw3M {%6
'|<`[ C-_u`|jQ public class FileAccessI implements Serializable{ ,nog6\ Rhlm //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 1A93ol=
RandomAccessFile oSavedFile; 2./z6jXW_ long nPos; DZ`,QWuA dM,{:eID '?90e4x3/ public FileAccessI() throws IOException ^-Ks_4 { 8xj_)=(sV! this("",0); &]f8Xd } zWN]#W` P;7[5HFF * W"Pv,: public FileAccessI(String sName,long nPos) throws IOException g}?39?o4 { sj+ ) oSavedFile = new RandomAccessFile(sName,"rw"); F)l1%FCm this.nPos = nPos; <,*w$ oSavedFile.seek(nPos); ?!tO'}? } %YuFw|wO EnMc9FN(y G=Xas"| public synchronized int write(byte[] b,int nStart,int nLen) t|&hXh{ { D1]?f` int n = -1; I_c?Ky8J_| try{ aTaL|&( oSavedFile.write(b,nStart,nLen); QVb{+`.7 n = nLen; x {Rj2~KC } bHDZ=Ik catch(IOException e) ASS<XNP { + >tSO!}[ e.printStackTrace (); YEiw! } .L)j
ql% vA?3kfL|# q)"yP\ return n; Fe2iG-ec } `j6O
tB0f+ wC o3'Za'N. } ypvz&SzIh |i(@1 l Z%{`j!!p /* `:gXQmt **SiteInfoBean.java fo;^Jg. */ /7R0w package NetFox; OV^?cA (]"`>,ray -+Ox/>k public class SiteInfoBean { 7MX5hZF" xy^z_` ]%(X}]} private String sSiteURL; //Site's URL opReAU'I private String sFilePath; //Saved File's Path `!
)^g/>0i private String sFileName; //Saved File's Name .|LY /q\A private int nSplitter; //Count of Splited Downloading File ;C5
J^xHI a;G>56iw Zx|VOl,; public SiteInfoBean() Ye\&_w"
{//nSplitter的缺省值为5 _W BWFGj //default value of nSplitter is 5 U;]h/3P this("","","",5); %hA0 } <xD6}h/ E(an5x/r $*+`;PG- public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) sWMY
Lo { j'LO'&sQ( sSiteURL= sURL; NvJ}|w,Z sFilePath = sPath; 'Fa~l'G7X sFileName = sName; bx3kd+J7 this.nSplitter = nSpiltter; bSk)GZyH\d l\&Tw[O Vdb X4^V } ;TCT%j`^o CQET cG4$)q;q public String getSSiteURL() 6z1>(Za7> { 9:CM#N~?o return sSiteURL; l\t<_p/I)^ } PLQLGb4f_; DZU} p -h#9sl-> public void setSSiteURL(String value) V?-OI> { F)uS2 sSiteURL = value; ),U>AiF] } kSU]~x "S0WFP\P+ ? VHOh9|AT public String getSFilePath() 52z{ { q,2 +\i return sFilePath; yxL(mt8 } +{H0$4y "']|o ~B 7G
&I]> public void setSFilePath(String value) 629#t`W\ { 0I"r*;9?K sFilePath = value; pcO0xrI } L
[=JHW <P1x3 "DU1k6XC public String getSFileName() &bT \4 { 3YJa3fflK return sFileName;
@1O.; } "/qm,$ GilmJ2< Ig"QwvR public void setSFileName(String value) p2uZ*sY(D { [W*Q~Wvp sFileName = value; KBy*QA } zpBkP-%}E $ {5|{` OCN@P+L3q public int getNSplitter() 'MY0v_ { [7@9wa1v! return nSplitter; GR>kxYM%q } We?cRb t p<wMrq< \O(~:KN public void setNSplitter(int nCount) iFkXt<_A { s\3OqJo%) nSplitter = nCount; ]@9ZUtU,;N } ]c~W$h+F } [ T!0ka I*hzlE ~3,k8C"pRq /* (~OP)F). **Utility.java II)
K0< */ 8m"jd+ package NetFox; caXSt2|' X&s"}Hf Ic')L*i7O public class Utility { \_8.\o"@*# ^&Wa?
m. O"V;otlC public Utility() 1Zt>andBF { s5
($b ^g
N/ 5 ViYfK7Z } Ze"m;T 4I!g?Moh //线程睡眠 w:c9Z=KX public static void sleep(int nSecond) (L'|n*Cr { nR`)kORc try{ br%l>Y\" Thread.sleep(nSecond); t+Au6/Dx? } Q.} guI\ catch(Exception e) ><i: P*ht { P^[y~I#{ e.printStackTrace (); J^y?nE(j } /X;/}fk } -OXC;y =:BTv[lv //日志 %WlTx&jSgE public static void log(String sMsg) YDYN#Ob(; { DPr~DO`b System.err.println(sMsg); $Ts;o } bCqTubbx!t t W}"PKv z)Lw\H^/ public static void log(int sMsg) 2{<o1x,Ym { .t7ME{ System.err.println(sMsg);
3 #"!Hg } -G(#,rXk } V{UY_
e8W :!ablO~ '<{Jlz(u9 /* xVk5% **TestMethod.java 72 ZoN<c */ Q^bYx (r5w package NetFox; |k^C- CaC \\5wl {2 k]$| public class TestMethod { ^.9DfA0 % {-r'Yi% +;-ZU public TestMethod() vXm'ARj
{ ///xx/weblogic60b2_win.exe u\;d^A try{ q%LjOPE
V SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); C1>zwU_zo //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); @C%6Wo4l3 SiteFileFetch fileFetch = new SiteFileFetch(bean); fN/;BT fileFetch.start(); g(9kc<`3'D } `hdN 6PgK catch(Exception e){e.printStackTrace ();} />N# PF ..zX z'*"iaX<c } D5!#c-Y- 'E&tEbY xS>vmnW public static void main(String[] args) IEfYg(c0U { N\];{pe> new TestMethod(); Zl>dBc% } /EG'I{oC } "7'P Lo3O 点击下载更多相关资料
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