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/* rel_Z..~ **SiteFileFetch.java Zo`_vx/{j */ ]sLdz^E3D package NetFox; [8jIu&tJf import java.io.*; AdD,94/ import java.net.*; J~}sQ{ 0 "rA-u)Te '9u(9S public class SiteFileFetch extends Thread { !{q_Q ! z_f^L %J0 k~Z;S QyN SiteInfoBean siteInfoBean = null; //文件信息Bean \?tE,\Ln long[] nStartPos; //开始位置 hg7^#f95u long[] nEndPos; //结束位置 Zz/
z7~{ FileSplitterFetch[] fileSplitterFetch; //子线程对象 WYJH+"@%j long nFileLength; //文件长度 xB`j*
% boolean bFirst = true; //是否第一次取文件 }i$ER,hXh boolean bStop = false; //停止标志 iVT)V>U p File tmpFile; //文件下载的临时信息 9$f% DataOutputStream output; //输出到文件的输出流 oZ5 ,y+L4 L9{y1'') //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) L;h|Sk]{ public SiteFileFetch(SiteInfoBean bean) throws IOException e1Q
{ %-fQ[@5 siteInfoBean = bean; swKqsN. //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ^|%u%UR tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); r(j :C%?}C if(tmpFile.exists ()) 'C7$,H' { 70-nAv bFirst = false; twMDEw#VL read_nPos(); u+
b `aB } T].Xx` else YJGP8 { otA'+4\ nStartPos = new long[bean.getNSplitter()]; G4rd<V0[D nEndPos = new long[bean.getNSplitter()]; ^u(-v/D9 } |BBo $+|.
@ss +I3j2u8L i0nu5kD+d } nT
:n>ja K2{6{X= &yRR!1n)H public void run() T*z*x=<5 { ka/>jV" //获得文件长度 )LAG$Cn //分割文件 qh|fq
b //实例FileSplitterFetch 6t=)1T //启动FileSplitterFetch线程 .WLwAL //等待子线程返回 RiG]-K: try{ #+&"m7
s if(bFirst) tH=jaFJ { ZZ>F ^t nFileLength = getFileSize(); %6\L^RP if(nFileLength == -1) v,|jmv+: { [}I|tb>Pg System.err.println("File Length is not known!"); 9zl-C*9vj } MbxJ3"@ else if(nFileLength == -2) $px1D$F ! { _Un*x5u2O System.err.println("File is not access!"); ?f= ~Pn+ } CC)Mws+2 else VpX*l3 { j^.|^q<Y for(int i=0;i<nStartPos.length;i++) ''($E/ { xwub-yz nStartPos = (long)(i*(nFileLength/nStartPos.length)); yMEI^,0" } WCY5F for(int i=0;i<nEndPos.length-1;i++) T9FGuit9 { ,]tEh:QC nEndPos = nStartPos[i+1]; ;o158H$gz; } [>LO'}% nEndPos[nEndPos.length-1] = nFileLength; &r+!rL Kp } *4/KK } cx[[K. i0u`J RdB,;Um9f //启动子线程 5?A<('2 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; `(r0+Qx for(int i=0;i<nStartPos.length;i++) yU>ucuF { +~EnrrT+W fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;6$W-W _ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 9a#Y
D;-p nStartPos,nEndPos,i); XVF!l>nE Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9"?;H%. fileSplitterFetch.start(); ~l('ly } XMzQ8|] // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), P{HR='2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); JkI|Ojmm/ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", @"B{k%+ nEndPos = " + nFileLength); ~x[(1 // fileSplitterFetch[nPos.length-1].start(); f\FqZ?w 0v#p4@Z O>>/2V9 //等待子线程结束 !D!"ftOm //int count = 0; {]%7-4E //是否结束while循环 -Un"z6* boolean breakWhile = false; cSjX/%*!m xt6%[) cd`P'GDF while(!bStop) r`$P60,@C { c_t7< write_nPos(); Wngc(+6O& Utility.sleep(500); _q4Yq'dI breakWhile = true; cfPp>EK k(xB%>ns W6RjQ1 for(int i=0;i<nStartPos.length;i++) {8 &=t8,c { dkW7k^g if(!fileSplitterFetch.bDownOver) pgW^hj\ { (Vn3g ra breakWhile = false; |tC= j. break; nt@uVwfQ } N;DE,[:< } G^Y^)pc] if(breakWhile) )LsUO#%DO break; %!DTq`F .@\(ay JLjb'Bn //count++; WpOH1[8v //if(count>4) g][n1$% // siteStop(); vsPIvW!V } 2*V]jO !?sB=qo Vh^ :.y System.err.println("文件下载结束!"); qoZe<jW ( } ;I6C`N catch(Exception e){e.printStackTrace ();} #%pY,AK:= } y4VO\N!
VtMnLFMw $
nMx#~>a //获得文件长度 r?|(t? public long getFileSize() g-H,*^g+ { W)^%/lAh int nFileLength = -1; l3y}nh+ 8 try{ P~V ^Efz{ URL url = new URL(siteInfoBean.getSSiteURL()); [+
: zlA HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >QPCYo<E httpConnection.setRequestProperty("User-Agent","NetFox"); ]bbP_n8 3NdO3-~) $oJjgA xcZ int responseCode=httpConnection.getResponseCode(); #bCUI*N"P if(responseCode>=400) %L$?Mey { 8w#4T:hsuN processErrorCode(responseCode); 7#N
?{3i return -2; //-2 represent access is error "Xl"H/3r } rHqP[[4B' %zR5q Lb [;l;kom String sHeader; 1r5Z$3t\ ^5)=)xVF {E}D6`{ for(int i=1;;i++) xTqP`ljX { O]?\<&y //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); cEn|Q //Utility.log(in.readLine());
#Zi6N sHeader=httpConnection.getHeaderFieldKey(i); VCT1GsnE if(sHeader!=null) +U>Y.YP { 9{rE7OX*A if(sHeader.equals("Content-Length")) Iu(]i?Y { ZXf&pqmG nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); fF2]7: break; mRt/d } :fUNc^\2 } jk Aru_C else 06`caG|]-M break; l\!`ZhM, } !|
q19$ } roBbo catch(IOException e){e.printStackTrace ();} } Fli catch(Exception e){e.printStackTrace ();} s#aane n0t+xvNDF_ YgtW(j[ Utility.log(nFileLength); yr* ~?\ QWWI crx%;R return nFileLength; N/1xc1$SB } jthyZZ ^)'D
eP/ 4F<was/ //保存下载信息(文件指针位置) {DE4PE` private void write_nPos() X_)I"` { "Y"`'U=v try{ 9JeT1\VvHY output = new DataOutputStream(new FileOutputStream(tmpFile)); x7i,jMR output.writeInt(nStartPos.length); :.f(}sCS for(int i=0;i<nStartPos.length;i++) JUJrtKS { di]CYLf // output.writeLong(nPos); bx Wzm| output.writeLong(fileSplitterFetch.nStartPos); +i}uRO output.writeLong(fileSplitterFetch.nEndPos); 2Ky|+s[`[ } bIzBY+P output.close(); ? :A%$T } 1uEM;O catch(IOException e){e.printStackTrace ();} QtcYFf
g catch(Exception e){e.printStackTrace ();} LG{50sP` } $O fZp<M .&Sjazk0XO +(`.pa z@ //读取保存的下载信息(文件指针位置) %WqUZ+yy private void read_nPos() HcV,r,>e { &o&}5Aba9 try{ .3wx}!:*| DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Ci[Ja#p7$h int nCount = input.readInt(); )EcfEym.> nStartPos = new long[nCount]; -I z,vd nEndPos = new long[nCount]; TxKNDu
for(int i=0;i<nStartPos.length;i++) *ozXilO { ;Y`8Ee4vH nStartPos = input.readLong(); !u/c'ZLZ> nEndPos = input.readLong(); '$4&q629d } OLGMy5 input.close(); [(vV45(E } IK8"3+( catch(IOException e){e.printStackTrace ();} YpG6p0
nd catch(Exception e){e.printStackTrace ();} 67||wh.BU } :3b\ pEO9\ ]w]:9w Ax9A-| private void processErrorCode(int nErrorCode) 1M?Sl?+j { 76u\#{5 System.err.println("Error Code : " + nErrorCode); dV^ck+ } j*~z.Q | oHF,k 4F!%mMq //停止文件下载 [vnxp/v/< public void siteStop() |-%dN }O { jS|jPk|I. bStop = true; ,o0[^-b< for(int i=0;i<nStartPos.length;i++) s-F3(mc( fileSplitterFetch.splitterStop(); -AQ
7Bd R-2Abyts2 d7Z$/ $ } }_Y\6fcd } '
R= O eH //负责部分文件的抓取 M{=p0?X **FileSplitterFetch.java _+Uf5,.5yU */ {>Qs+] package NetFox; Bi0&F1ZC! vCtnjWGX}/ mAe)Hy % import java.io.*; 1R]h>' import java.net.*; bE jQMlb bOr6"nn =7S\-{ public class FileSplitterFetch extends Thread { ;9)=~) _z#S8Y mhNgXp)_56 String sURL; //File URL >^v,,R8j long nStartPos; //File Snippet Start Position }To-c' long nEndPos; //File Snippet End Position
B"t4{1/ int nThreadID; //Thread's ID z:08;}t boolean bDownOver = false; //Downing is over !1<>][F boolean bStop = false; //Stop identical JycC\s+%E FileAccessI fileAccessI = null; //File Access interface 3)l<'~"z< .G/RQn]x} |KSoS#Y public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException HzZX=c { WVx^}_FD0 this.sURL = sURL; SPINV. this.nStartPos = nStart; ~-A"M_n ? this.nEndPos = nEnd; =05jjR1 nThreadID = id; Qqp= fileAccessI = new FileAccessI(sName,nStartPos);//定位 :x!'Eer
n } )r
XUJ29. %'9&JsO tU-jtJ public void run() yq` ,) { `CG% Y>+ while(nStartPos < nEndPos && !bStop) prGp/"E { q=k[]vD :eSwXDy& TezwcFqH try{ Xs)?PE[ URL url = new URL(sURL); 9hhYyqGsO HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); py\/m] httpConnection.setRequestProperty("User-Agent","NetFox"); I$f'BAw String sProperty = "bytes="+nStartPos+"-"; qITd.<
k httpConnection.setRequestProperty("RANGE",sProperty); "gXvnl Utility.log(sProperty); #aadnbf bFfDaO<k Rts}y:44 InputStream input = httpConnection.getInputStream(); D ~NWP%H //logResponseHead(httpConnection); %vU*4mH x'
3kHw %;O# y3, byte[] b = new byte[1024]; okBaQH2lUl int nRead; B,A\/%< while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) '~pZj"uy { ^!K 8nW{* nStartPos += fileAccessI.write(b,0,nRead); (U*Zz+ R //if(nThreadID == 1) J*qo3aJjE // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); / KKA/ } A$]#f Hnbd<?y
T{Yk/Z/}? Utility.log("Thread " + nThreadID + " is over!"); *35o$P46 bDownOver = true; wtfM}MW\ //nPos = fileAccessI.write (b,0,nRead); D!bi>]Yd } <-!'V,c catch(Exception e){e.printStackTrace ();} )umW-A } h6e,w$IL }
:a M@"#F nY?X@avo> n:%A4* //打印回应的头信息 !jN$U%/,%. public void logResponseHead(HttpURLConnection con) X+//$J { ^ANz=`N5, for(int i=1;;i++) mz^[C7(q'( { Q0TKM> String header=con.getHeaderFieldKey(i); 6`)Ss5jzk if(header!=null) u6P U(f //responseHeaders.put(header,httpConnection.getHeaderField(header)); #s-li b Utility.log(header+" : "+con.getHeaderField(header)); ''CowI else QtfLJ5vi break; PML84*K - } ;}AcyVV } 2spK#0n.HV CfHPJ:Qo[ 'h{DjNSM
public void splitterStop() _B\X&!G. { #M8>)o c bStop = true; Jl89}Sf } &3Mps[u:h &sS]h|2Z5 Y\{lQMCy } 76S>xnN Jry643K>:; GC~N$!* /* +Z%8X!Q **FileAccess.java tOw[ *//文件访问(定位,写) b/eo]Id ] package NetFox; f8L3+u import java.io.*; zuBfkW95+ Q37zBC0 zKaEh
public class FileAccessI implements Serializable{ Redxg. P +F6R@@rWr //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 A*3R@G*h RandomAccessFile oSavedFile; 8hvh
xp long nPos; X[o"9O|< ps=QVX)YP g?!;04 public FileAccessI() throws IOException 7>|p_o`e { bl;v^HR0) this("",0); ZQrgYeQl" } O}"fhMk 4(\7Or('' *wJ'Z4_5F public FileAccessI(String sName,long nPos) throws IOException wGA%h.[M| { n 0ls a@l oSavedFile = new RandomAccessFile(sName,"rw"); Jf8AKj3 this.nPos = nPos; .(zZTyZr oSavedFile.seek(nPos); $6\W8v } 7j%sM& 9i#K{CkC| ?8)$N public synchronized int write(byte[] b,int nStart,int nLen) G3t
4$3| { z50f$!? int n = -1; K?aUIkVs try{ -q/FxESp oSavedFile.write(b,nStart,nLen); 5V/CYcO n = nLen; u+uu?.bM } `o!a
RX catch(IOException e) RlTVx: { G6x 2!Ny e.printStackTrace (); MBH/,Yd } 4WV)&50 L\asrdL?= <0I=XsE1iX return n; )d-{# } E.~~.2
uu582%tiG B 9AE* } Sf0[^"7 :7Q,
`W9 {01wW1 /* Nm/Fc **SiteInfoBean.java ?YbZVoD)J */ *npe]cC package NetFox; A?829< %;9+`U Jv=G3=. public class SiteInfoBean { XS/5y(W wY j~ (P" 7oI^sh k private String sSiteURL; //Site's URL OT5'c l private String sFilePath; //Saved File's Path BV
HO_ private String sFileName; //Saved File's Name 2nPU $\du private int nSplitter; //Count of Splited Downloading File h/%Hk;|9 \4`2k $R<eXDW6: public SiteInfoBean() DweWFipyPi {//nSplitter的缺省值为5 (&u)FB* //default value of nSplitter is 5 m=<;) this("","","",5); XL7jUi_4:L } n`hes_{,g s~6irf/ 5K*-)F
] public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) wfrWpz=FO { ?RD)a`y51 sSiteURL= sURL; )(pJ~"'L sFilePath = sPath; h&6x.ps@ sFileName = sName; lEC58`Ws this.nSplitter = nSpiltter; P&Q 5ZQb 3It'!R8 $ 4n@,
p0 } gZs8BKO (7rG~d1iS lFY;O !Y5\ public String getSSiteURL() f V.(v& { wFaWLC|& return sSiteURL; N7xkkAS{ } JZQ$*K ^OQ#N z Do|`wpR public void setSSiteURL(String value) 8Q1){M9' { :8aIj_qds sSiteURL = value; K9*#H( } .W&rcqy <ZNa` EF{_-FXY public String getSFilePath() -3r&O: { !lF|90= return sFilePath; 6X:-Z3 } 5aTyM_x ~I>B5^3 3;`93TO{ public void setSFilePath(String value) U<NpDjc" { g5to0 sFilePath = value; \?fl%r2 } m-a_<xo ?^&!/, ls6ywLP{ public String getSFileName() s^9N7' { "FaG5X( return sFileName; RS/%uxS? } Nu{RF |[|X ?xX`_l public void setSFileName(String value) ^dYLB.'= { MnsnW{VGX sFileName = value; fK^FD&sF } ki^[~JS>' *.EtdcRo[ i\rI j0+ public int getNSplitter() @Cm"lv.hz { h{ce+~X return nSplitter; H$ xSl1>E } tO?*x/XC{ cVn7jxf wR/i+,K public void setNSplitter(int nCount) )11/BB\v { BoIe<{X(9 nSplitter = nCount; NnSI=M } uW[s? } {M E|7TS= miHW1h[= VkhK2 /* Z/uRz]Hi **Utility.java S,S_BB<Y[b */ 7!JoP?! package NetFox; 6aQ{EO-]'= jO:<"l^+u }+ #ag:M public class Utility { qm]ljut JEBo!9 "Jnq~7] public Utility() B?Y%y@. { p|Rxy"} hY'"^?OP dt3Vy*zL } ~`_nw5y .#WF' //线程睡眠 '}4[m>/ public static void sleep(int nSecond) ^Z:x poz, { NnHM$hEI"U try{ F<-Pbtw Thread.sleep(nSecond); ~P6K)V|@< } L1C'V/g catch(Exception e) [TO:-8$. { 3y 3
U`Mo e.printStackTrace (); 3+ i(fg_ } nNilTJ
} (%+DE4? ^QW%<X //日志 R!pV`N public static void log(String sMsg) &<^@/osi { !>S'eXt System.err.println(sMsg); `&9#!T. } <"[}8 Dh +^;dQ6 PL+fLCk,I public static void log(int sMsg) ={L:q8v) { [>_(q|A6+ System.err.println(sMsg); B~PF <8h5 } "F[VqqD } =C3l:pGMB; x-Mp6 6o1.?t? /* [[s k **TestMethod.java Y?%6af+ */ @MB;Ez
v package NetFox; >9u6@ !^"hYp` Ugdm" public class TestMethod { ~C!vfPC MzG(+B :Dr&
{3> public TestMethod() HZK0Ldf { ///xx/weblogic60b2_win.exe ]-PF? 8 try{ ?4lAL SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); caj) //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); s`
9zW, SiteFileFetch fileFetch = new SiteFileFetch(bean); x(=kh%\; fileFetch.start(); o$-8V:)6d } v\MH;DW^Z catch(Exception e){e.printStackTrace ();} )E[5lD61 n3|~X/I ZXUe4@qfl } dl":?D4H 'g=yJ RD_;us@&&* public static void main(String[] args) vy"Lsr3 { ;!~;05^iD new TestMethod(); dIpt&nH&$ } 'Vrev8D } rf`Br\g8 点击下载更多相关资料
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