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/* ja>T nfu **SiteFileFetch.java L"b5P2{c */ ?4~lA
L1 package NetFox; QnGJ4F import java.io.*; } M~AkJL import java.net.*; ]jYl:41yI dvj`%?= ,,iQG' * public class SiteFileFetch extends Thread { "M*\,IH '/p5tw8 I%s/h4x^B[ SiteInfoBean siteInfoBean = null; //文件信息Bean E|fPI u long[] nStartPos; //开始位置 G37_
`C long[] nEndPos; //结束位置 . }1!MK5 FileSplitterFetch[] fileSplitterFetch; //子线程对象 BW*zj=N% long nFileLength; //文件长度 3~S~)quwP boolean bFirst = true; //是否第一次取文件 O0I/^ boolean bStop = false; //停止标志 "{:*fI;! File tmpFile; //文件下载的临时信息 _6[NYv$" DataOutputStream output; //输出到文件的输出流 ~gAx }z*p2)v` //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) R`<E3J\* public SiteFileFetch(SiteInfoBean bean) throws IOException @F1pu3E { z DK+8 siteInfoBean = bean; bIhL!Ty T. //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 3whyIXs tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); FPMW"~v if(tmpFile.exists ()) Ar$LA"vu4 { P"#^i<ut@T bFirst = false; I'j?T. read_nPos(); }l2JXf55 } ':[y]ep(~| else _8`|KY { 8_LDS nStartPos = new long[bean.getNSplitter()]; r#j*vO ' nEndPos = new long[bean.getNSplitter()]; := 8vy } RU'J!-w{ 1hN!
2Y: _1Eyqh`oh lV1|\~?4 } s0h)~z 0'<S7?~| *5NffiA}- public void run() _96&P7 { JSL 3.J //获得文件长度 dvf*w:5K! //分割文件 8,=$>@u //实例FileSplitterFetch BOG )JaDW //启动FileSplitterFetch线程 kDKpuA! //等待子线程返回 *SW,pHYnLb try{ @PI\.y_w if(bFirst) F,bl>;{[{ { t>[r88v nFileLength = getFileSize(); B+<k,ad if(nFileLength == -1) Q9' p2@Z { AjS5 System.err.println("File Length is not known!"); pqe
tYu } 4M]8po/; else if(nFileLength == -2) )<|T Ep4r- { N4:'X6u; System.err.println("File is not access!"); : ?V; } ?-f>zx8O else o6r4tpiR5 { `#]\Wnp~y for(int i=0;i<nStartPos.length;i++) Dn[1BWM/7 { `4=b|N+b" nStartPos = (long)(i*(nFileLength/nStartPos.length)); JjmL6(*ui } ymzm x$o= for(int i=0;i<nEndPos.length-1;i++) S;NXOsSu { HT&0i,` nEndPos = nStartPos[i+1]; zxh"@j$? } =
` ^jz} nEndPos[nEndPos.length-1] = nFileLength; gr;M
} NR*SEbUU* } >g[W@FhT'k g U?) *t_&im%E //启动子线程 0D'Wr(U( fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; TU/J]'))C for(int i=0;i<nStartPos.length;i++) aPC!M4# { Vo%d;>!G\; fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), H@zk8]_P siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), c;^ J!e nStartPos,nEndPos,i); pR"qPSv' Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -db+Y:xUZ fileSplitterFetch.start(); z)%1 i } C gx?K]>y // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), - -G1H siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); <} %ir,8 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", B /W$RcV nEndPos = " + nFileLength); E(@;p%: // fileSplitterFetch[nPos.length-1].start(); Q-F9oZ*0 "7HB3?2>W G
DV-wPX //等待子线程结束 L9T u>4 //int count = 0; {9Y'v //是否结束while循环 `9ox?|iJ boolean breakWhile = false; $<v_Vm?6d K288&D|1WU yShHFlO= while(!bStop) 0REWbcxd" { sYXS#;|M write_nPos(); e@OA> Utility.sleep(500); GHy#D]Z breakWhile = true; 'T[zh#v>S f[IchCwX i.sq^]j for(int i=0;i<nStartPos.length;i++) guv@t&;t0 { {<kG{i/ if(!fileSplitterFetch.bDownOver) z (3"\ ^T { akQH+j breakWhile = false; vrzX%' break; U3}R^W~eb } _
^{Ep/ME= } |Z ,G
if(breakWhile) Q7|13^|C break; kre&J $1+K}tP Q$1K{14I //count++; Nd!VR+IZ //if(count>4) 0Mg8{ // siteStop(); F:S,{&jB } >K
:"[? "NU".q 8(>.^667 System.err.println("文件下载结束!"); c~xo@[NaS } yf) `jPM1< catch(Exception e){e.printStackTrace ();} -`OR6jd } ` a>vPW v=tj.Vg &._!)al //获得文件长度 +ZKhmb! public long getFileSize() {yR)}r { A+I&.\QAR int nFileLength = -1; J\3} il
N try{ K//T}-Uub URL url = new URL(siteInfoBean.getSSiteURL()); VA'X!(Cv HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,:4DN&< httpConnection.setRequestProperty("User-Agent","NetFox"); t1jlxK xXZKj pFTlhj)1 int responseCode=httpConnection.getResponseCode(); |*KS<iHr% if(responseCode>=400) "<x~{BN? { ,g_onfY processErrorCode(responseCode); u!o]Co> return -2; //-2 represent access is error 0j(jJAE. } B#"|5 SDHc[66' nKB&|! String sHeader; 87KrSZ {~fCqP.2 Cc)P5\jh for(int i=1;;i++) c1kxKxE { ]<gCq/V # //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); KC:4 //Utility.log(in.readLine());
YX`=M sHeader=httpConnection.getHeaderFieldKey(i); *Ca)RgM if(sHeader!=null) JA(fam~{ { lt6;*z[ if(sHeader.equals("Content-Length")) UZP6x2:= { _i[)$EgFm nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); -'[(Uzj break; Wi[m`# } :z.Y$]F@ } drKjLo[y else 9xn23*Fo break; ceZ8}Sh } UVc<C
1q } ^}Qj} catch(IOException e){e.printStackTrace ();} N4mJU'_{ catch(Exception e){e.printStackTrace ();} s;2/Nc +'/}[1q1/T (\t_Hs::a Utility.log(nFileLength); ZuvPDW% V.ji
_vX ] 5v4^mk return nFileLength; `n`"g<K)Q } 'd#\7J>d 7TkxvSL X ^mueFw}\ //保存下载信息(文件指针位置) ;Q=GJ5`B private void write_nPos() PKR $I { }l(m5 try{ $i:||L^8p output = new DataOutputStream(new FileOutputStream(tmpFile)); u'i%~(:$\) output.writeInt(nStartPos.length); ;,=h59` for(int i=0;i<nStartPos.length;i++) F|?'9s*;6G { EeJqszmH // output.writeLong(nPos); j;20JA/b output.writeLong(fileSplitterFetch.nStartPos); "6N~2q,SW output.writeLong(fileSplitterFetch.nEndPos); ,.jHV } K-
I\P6R` output.close(); #[a"%byTR } ) wY!/& catch(IOException e){e.printStackTrace ();} -~\.n catch(Exception e){e.printStackTrace ();} 6f?BltFaN } 5m^Hi}S_ 4b2mtLn_ "f|(@a //读取保存的下载信息(文件指针位置) pAil]f6 private void read_nPos() 58&{5YpS { E8-fW\!F try{ ?#m<\]S< DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); AL]h|)6QpC int nCount = input.readInt(); pSQCT nStartPos = new long[nCount]; zD2.Q%`IM nEndPos = new long[nCount]; n<?SZ^X{,/ for(int i=0;i<nStartPos.length;i++) T+WZE { m0j|58~ nStartPos = input.readLong(); =1*%>K nEndPos = input.readLong(); hA*Z'.[ } cRh\USS input.close(); C~{NKMeC/m } H5Ux.]y catch(IOException e){e.printStackTrace ();} .vN%UNu catch(Exception e){e.printStackTrace ();} SgpZ;\_ } >AQ)x /z1p/RiX IAP/G5'Q private void processErrorCode(int nErrorCode) C[xJU6z { &^&$!Xmu9 System.err.println("Error Code : " + nErrorCode); [O7w = } {b'}:aMc ]D LZ&5pv v._Egk0 //停止文件下载 %9T~8L
@. public void siteStop() SbS$(Gt#Bv { j9URl$T: bStop = true; -J"qrpZ^ for(int i=0;i<nStartPos.length;i++) QSHJmk 6L fileSplitterFetch.splitterStop(); N^h|h '7Mep
] t/KcXM } <E>7>ZL } 5=Kq@[(4 //负责部分文件的抓取 F1gt3 ae **FileSplitterFetch.java eC6>yD6D */ =6cyE package NetFox; -(\1r2
Y HKTeqH_: [x!i*
rW3 import java.io.*; ^^7L"je]g import java.net.*; euV $2Fg qr)v'aC3 <.,RBo public class FileSplitterFetch extends Thread { 1l/AKI(! 4>4V-m\ q.=^iz&m String sURL; //File URL =oE_.ux\ long nStartPos; //File Snippet Start Position #puQi long nEndPos; //File Snippet End Position ih>a~U< int nThreadID; //Thread's ID @[MO,J&h boolean bDownOver = false; //Downing is over kS B boolean bStop = false; //Stop identical +
a-wv FileAccessI fileAccessI = null; //File Access interface #K=b%;> N;-/w ip 59{;VY81 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException >u=%Lz"J { -7>^
rR V this.sURL = sURL; `"a? a5]k this.nStartPos = nStart; 1.'(nKoq this.nEndPos = nEnd; |DN^NhtE nThreadID = id; AL>c:K)qO fileAccessI = new FileAccessI(sName,nStartPos);//定位 R'6@n#: } j4;Du>obQ i@P 9EU 4|[<e-W public void run() U/ ?F:QD4 { EjWgaV while(nStartPos < nEndPos && !bStop) tT;8r8@ { Wrmgu}q 3A-*vaySV >M?H79fF2s try{ Hm>-LOCcl URL url = new URL(sURL); 7\mDBG HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); JOBz{;:R{ httpConnection.setRequestProperty("User-Agent","NetFox"); r5o@+"! String sProperty = "bytes="+nStartPos+"-"; Iq{o-nq httpConnection.setRequestProperty("RANGE",sProperty); -=>sTMWpr Utility.log(sProperty); Hx$.9'Oq\Q L-#e?Y}$J (O$}(Tn InputStream input = httpConnection.getInputStream(); j!YNg*H //logResponseHead(httpConnection); O!;H}{[dg \B_i$<Sz zhNQuK,L byte[] b = new byte[1024]; 0|g[o:;fl_ int nRead; WtIMvk while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) }N?g| { ?TDvCL nStartPos += fileAccessI.write(b,0,nRead); mge#YV:: //if(nThreadID == 1) n_v02vFAHT // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); hM?`x(P } i8K_vo2Z) *oCxof9JA _B)s=Snx Utility.log("Thread " + nThreadID + " is over!"); >K\3*]>J3 bDownOver = true; o&~dGG4J //nPos = fileAccessI.write (b,0,nRead); @B?FE\ } z.
'Fv7 catch(Exception e){e.printStackTrace ();} $; ?c?n+ } w4UD/zO } >w9sE8i Q| ?'(J+ W!t{rI7 2 //打印回应的头信息 iQqqs`K public void logResponseHead(HttpURLConnection con) tww=~! { $]C=qM28- for(int i=1;;i++) wh%xkXa[ur { :vpl+)n String header=con.getHeaderFieldKey(i); tZbFvk2 if(header!=null) 6,X+1EXY //responseHeaders.put(header,httpConnection.getHeaderField(header)); C,fY.CeI Utility.log(header+" : "+con.getHeaderField(header)); Pb#P`L7OB else vm8$:W2 } break; !v0"$V5+i } /hL\,x2 } g0PT8]8 E, GN| l Qlw>+y-i public void splitterStop() 9TC)
w| { 58: :h.: bStop = true; ~(P&g7u } 09'oz*v{# 30s; } H9U.lb } {Ur7#h5 gljo;f: w8p8 ;@ /* m^<p8KZ **FileAccess.java :5J_5,?;` *//文件访问(定位,写) p}uncIod package NetFox; pr_>b`p6 import java.io.*; 28a$NP\KW sf$o(^P9\A t8P PE public class FileAccessI implements Serializable{ _g~2R#2Q :|rPT)yT] //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 )n>+m|IqY( RandomAccessFile oSavedFile; YlTaN,?j long nPos; c;9.KCpwx ,[* ;UR *$S#o#5 public FileAccessI() throws IOException ^ *0'\/N& { <`)iA-Df;9 this("",0); L_Q S0_1 } {L].T# BgM%+b8u -}P7$|O& public FileAccessI(String sName,long nPos) throws IOException ]W/>Ldv { 3@_Elu oSavedFile = new RandomAccessFile(sName,"rw"); zyFUl% this.nPos = nPos; L0L2Ns oSavedFile.seek(nPos); M/pMs 6 } 0mTr-`s eklgLU-+fW ]n;1x1' public synchronized int write(byte[] b,int nStart,int nLen) &l m# { )"|||\Iv int n = -1; |0g{"}% try{ 2}vNSQvG oSavedFile.write(b,nStart,nLen); d$G}iJ8$mp n = nLen; 1y(UgEg } 8PBvV[ catch(IOException e) Z+4D.bA { T7[NcZ:I e.printStackTrace (); yz8jU*H } $,ikv?"L 4t*so~ 6@V~0DG return n; v7,$7@$:\ } XogVpkA MjD75hIZ l$XPIC~H } 3TS_-l XKS8K4" 2'] KTHm /* /TV=$gB` **SiteInfoBean.java Dvc&RG */ e2cP
*J package NetFox; 6;iJ*2f5V ;wHCj$q BUsV|e\ public class SiteInfoBean { xr%#dVk nB5zNyY4 LT VF8-v private String sSiteURL; //Site's URL b~w=v_[(I private String sFilePath; //Saved File's Path t e,[f private String sFileName; //Saved File's Name Y`BRh9Sa private int nSplitter; //Count of Splited Downloading File }t%W1UJ z~{&}Em ~ ypdT&5Mqb! public SiteInfoBean() m@Rtlb {//nSplitter的缺省值为5 y7)(LQRE
{ //default value of nSplitter is 5 yN6>VD{F this("","","",5); &JP-O60 } 5Qh?>n>* }`\/f eOI (6U! public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) CAD@XZSh { 6"f}O<M5H sSiteURL= sURL; OI}cs2m sFilePath = sPath; &(N+.T5cp sFileName = sName; .@ F]Pht this.nSplitter = nSpiltter; <RNJ>>0 T~:|!` 4\M.6])_ } EYX$pz(x; $O)3q
$| ?OlV"zK public String getSSiteURL() 7 msAhz { $F'>yop2b return sSiteURL; DA&?e~L&H } Np+&t} RQB
4s^t 36.N>G, public void setSSiteURL(String value) JW.=T) { 9f+>ix,ek* sSiteURL = value; C3NdE_E } \ZU1Jb1c umi5Wb< s?R2B)a public String getSFilePath() u8GMUN { kOo~%kcQ' return sFilePath; %zk$}}ti. } Y!J>U 7R!5,Js+ ??60,m:] public void setSFilePath(String value) ={>Lrig:l { $37
g]ZD sFilePath = value; %ru;;h } 6GPp>X
Q6'x\ rgmF: C public String getSFileName() c(;a=n(E# { DwHF[]v' return sFileName; ,Uhb } >9e(.6&2XZ G6@M&u5RT =L;] ;i public void setSFileName(String value) I`KQ|h0% { w }^ I sFileName = value; ?`zXLY9q7 } } :=Tm]S `K~AhlJUQ 2_vbT!_ public int getNSplitter() B33$pUk { ABE@n%|` return nSplitter; :G\<y } I$N8tn+E t58e(dgi )9l^O
public void setNSplitter(int nCount) !l]dR@e { Wjhvxk nSplitter = nCount; &nBa=Enf } J]f3CU,<N } e@:sR _4^R9Bt l2N]a9bq@ /* iY"l}.7) **Utility.java \%^%wXfp */ ]BR,M4 package NetFox; U!U$x74D5 sBrI}[oyx {ZY+L;eg1 public class Utility { P) 3mX.(} .`>y@p! J{^RkGF public Utility() E4m` { M%jPH Y"A/^] UfS%71l.$ } p+)Y Tzzc #9K-7je;j //线程睡眠 ME'|saP public static void sleep(int nSecond) _6ay-u { RV@*c4KvO+ try{ lz1wO5%h Thread.sleep(nSecond); "*G.EiLq } mZd ,
9 catch(Exception e) 4:g R r
{ }.s~T#v e.printStackTrace (); M|:UwqV> } gz3pX#S } {nLjY|* Qxj JN^Q //日志 M(/r%-D public static void log(String sMsg) [jmd { !.d@L6 System.err.println(sMsg); w*R$o } 8By|@LO Ol!ntNhXm VkZ7# public static void log(int sMsg) nqLA}u4IM { }iuWAFZbGS System.err.println(sMsg); j_Yp>=+[ } BCA&mi3q } fkac_X$7 o}ZdTf= `]%|f /* i>(e}<i **TestMethod.java wiiCd */ ti#7(^j package NetFox; 8YbE`32 AvW:<}a, Cg(Y&Gxf. public class TestMethod { X7rMeu uCcYPvm U*)8G public TestMethod() -,U3fts { ///xx/weblogic60b2_win.exe aTt12Sc try{ '*3h!lW1. SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); kBffF@{
//SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); j:VbrR SiteFileFetch fileFetch = new SiteFileFetch(bean); b9l;a+]d fileFetch.start(); *6VF
$/rP } fZoHf\B]{ catch(Exception e){e.printStackTrace ();} jbAx;Xt'=M OynXkH]0T+ 'ET~ } : 2EDjW 2 O%`G+\) ;5)P6S.D public static void main(String[] args) ]?(-[ { dUhY\v oQ new TestMethod(); ajEjZ6 } @<elq'2 } Fx2bwut.K 点击下载更多相关资料
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