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/* y*X_T,K8 **SiteFileFetch.java n=[/Z! */ Yk=PS[f package NetFox; >,td(= : import java.io.*; hdrm!aBd import java.net.*; z[Xd%mhjO P#AW\d^"B TqnTS0fx public class SiteFileFetch extends Thread { /~3r;M H)n9O/u R=jI?p SiteInfoBean siteInfoBean = null; //文件信息Bean x&0vKo; long[] nStartPos; //开始位置 S\;V4@<Kn long[] nEndPos; //结束位置 qT+%;( FileSplitterFetch[] fileSplitterFetch; //子线程对象 MdW]MW{ long nFileLength; //文件长度 &Y }N|q- boolean bFirst = true; //是否第一次取文件 irfp!(r boolean bStop = false; //停止标志 L*:jXmUM_~ File tmpFile; //文件下载的临时信息 Mxv;k%l|E| DataOutputStream output; //输出到文件的输出流 N0r16# -g kBffF@{
//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) j:VbrR public SiteFileFetch(SiteInfoBean bean) throws IOException d@qsdYu-* { *6VF
$/rP siteInfoBean = bean; fZoHf\B]{ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Oeok; : tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); `^)jLuyu
if(tmpFile.exists ()) /HaHH.e { vd[0X; bFirst = false; 4M2j!Sw read_nPos(); *6>.!& } RNe^;
B else 76`8=!]R { }9FSO9*&} nStartPos = new long[bean.getNSplitter()]; .nVa[B|. nEndPos = new long[bean.getNSplitter()]; BBev< } T
\_]^]> 7Ve1]) u \pVXimam r4SXE\
G } #~
)IJ \RG8{G, bJX)$G public void run() J|qZ+A[z { @"^0%/2- //获得文件长度 hbY5l}\5 //分割文件 N'GeHByIT //实例FileSplitterFetch .?loO3 m //启动FileSplitterFetch线程 :s7m4!EF //等待子线程返回 M
r5v< try{ c_4[e5z if(bFirst) ^y<<>Y'I { xjKR R? nFileLength = getFileSize(); !]=d-RGNe if(nFileLength == -1) sG92XJ { 6;ixa
hZV System.err.println("File Length is not known!"); c"B{/;A } G6$kv2(k`@ else if(nFileLength == -2) UdpF@Q { <4HDZ{"M System.err.println("File is not access!"); gMzcTmbc8 } Y!nJg1 else 3`t%g[D1 { PoxK{Y for(int i=0;i<nStartPos.length;i++) ^rifRY-,yO { !:q/Ye3. nStartPos = (long)(i*(nFileLength/nStartPos.length)); H}hiT/+$ } `)T13Xv for(int i=0;i<nEndPos.length-1;i++) KbA?7^zo` { Utnr5^].2O nEndPos = nStartPos[i+1]; WE: 24b6 } d?A
0MKnl nEndPos[nEndPos.length-1] = nFileLength; YoBDvV":@ } *%%g{
3$ } VHIOwzC w5Y04J 7/I, HxXp! //启动子线程 3h$6t7=C fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; <
HVl(O for(int i=0;i<nStartPos.length;i++) ]~'5\58sP { E87Ww,z8 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), tMf}
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 3=aQG'B nStartPos,nEndPos,i); MygfT[_ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); l1BtI_7p fileSplitterFetch.start(); {>hC~L?6 } W3MJr&p // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), fSK]|"c siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ,(EO'T[ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", `p2+&&]S nEndPos = " + nFileLength); Rh_np // fileSplitterFetch[nPos.length-1].start(); O$_)G\\\m |)(VsVG& E&2OD [iX //等待子线程结束 S4Y& //int count = 0; u)}$~E> //是否结束while循环 UC]\yUK1J boolean breakWhile = false; =8AO: K,+LG7ec ~A'!2 while(!bStop) }`%*W`9b { J&W)(Cf write_nPos(); 3@dL/x4A Utility.sleep(500); c;Pe/ d breakWhile = true; 7z JRJ*NB Yc_8r+;( p<2L.\6" for(int i=0;i<nStartPos.length;i++) 2^h27A { 6dabU* if(!fileSplitterFetch.bDownOver) J8uLJ { v+46QK|I& breakWhile = false; /:~\5}tW break; tn(JC%?^ } ,)Me } s4A43i'g!h if(breakWhile) *>7 >g" break; m% -g ~q j*so9M6|c HN=V"a //count++; Pg,b-W?n* //if(count>4) dJJP3}M/ // siteStop(); G_bG } &"f"; n}F&1Z JTO~9>$ B System.err.println("文件下载结束!"); de.&`lPRf } Dz>^IMsY catch(Exception e){e.printStackTrace ();} %b&".mN } p>RNPrT Ta
?_5 x$5) ^ud? //获得文件长度 UO0{):w> public long getFileSize() iU$] {c2;A { \?[v{WP) int nFileLength = -1; LClNxm2X try{ cv998*|X: URL url = new URL(siteInfoBean.getSSiteURL()); Ktb\ b w HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); xST8|H httpConnection.setRequestProperty("User-Agent","NetFox"); 5D\f8L JjPKR?[> PF)jdcX int responseCode=httpConnection.getResponseCode(); K1mPr^3rC if(responseCode>=400) `^u>9v-+' { *6sl processErrorCode(responseCode); K2M~-S3 return -2; //-2 represent access is error Cn'(<bl } *SU\ABcov G18F&c~ sqEI4~514 String sHeader; $?Yry.2 ^U
`[(kz= Ixb=L(V for(int i=1;;i++) 2|3)S`WZl { :o0JY= 5 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ;&<{ey //Utility.log(in.readLine()); "?]{%-u sHeader=httpConnection.getHeaderFieldKey(i); LJd5;so- if(sHeader!=null) diJLZikk { c`J.Tm[_u if(sHeader.equals("Content-Length")) QLXN*c { 4 !i$4 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); wQqb`l7+ break; .{ocV#{s } jF ^~p9z } kpJ@M%46
else UtPLI al break; F_w
Z"e6 } x2OaPlG,&V } {P*pkc catch(IOException e){e.printStackTrace ();} \|H!~) h$1 catch(Exception e){e.printStackTrace ();} %eX{WgH E@@5BEB ~ 'Y*E<6: Utility.log(nFileLength); ',Y.v"']4 '8Q]C*Z xbdN0MAU return nFileLength; rM`X?>iT+ } ![`Ay4AZ@a vI:;A/& jr)1(** //保存下载信息(文件指针位置) 'FqQzx"r private void write_nPos() Huy5-[)15 { .<jr0,i try{ YPU*@l> output = new DataOutputStream(new FileOutputStream(tmpFile)); 5:pM4J output.writeInt(nStartPos.length); QKyo`g7 for(int i=0;i<nStartPos.length;i++) p`b"-[93 { 61SlVec*o8 // output.writeLong(nPos); o|>'h$ output.writeLong(fileSplitterFetch.nStartPos); -e_hrCW&9 output.writeLong(fileSplitterFetch.nEndPos); 3kw,(-'1 } f[@77m* output.close(); s3~lT. } &M46&^Jho catch(IOException e){e.printStackTrace ();} pOGeruu? catch(Exception e){e.printStackTrace ();} v=0(~<7B } GR&z, 6g|*`x{ d ^^bke$~ //读取保存的下载信息(文件指针位置) C`$n[kCJ private void read_nPos() l n{e1':$" { 8K.R= try{ Id_2PkIN$~ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); r"C int nCount = input.readInt(); SQ44 nStartPos = new long[nCount]; YM1'L\^ nEndPos = new long[nCount]; TT2d81I3m for(int i=0;i<nStartPos.length;i++) "3Uv]F { !Fca~31R' nStartPos = input.readLong(); M$y+q
^ nEndPos = input.readLong(); A#Iyb){Y } [BWNRC1 input.close(); -wp|RD,}( } Cbg!:Cws catch(IOException e){e.printStackTrace ();} FKIw!m ~ catch(Exception e){e.printStackTrace ();} ZIf } 5*j?E /I1h2E 3 jGWkby0 private void processErrorCode(int nErrorCode) Y'1S`. { gbI^2=YT' System.err.println("Error Code : " + nErrorCode); mkYqpD7 } Sm)Ha:[4 hWM<
0= ]"t@-PFX< //停止文件下载 x}_]A$nV public void siteStop() Zo|.1pN { z>XrU>} bStop = true; =T-&j60 for(int i=0;i<nStartPos.length;i++) |uX,5Q#6 fileSplitterFetch.splitterStop(); lt
^GvWg FoNSM$x [h^2Y&Au5 } M^O2\G#B } 8VeQ-#7M/ //负责部分文件的抓取 isQ[ Gc!8 **FileSplitterFetch.java v/](yT */ [Yo,*,y31 package NetFox; brW :C?} d@ i}-; ?\vh9 import java.io.*; N9jH\0nG import java.net.*; Hw7;;HK
7 7Nk!1s: }RzWJ@QD< public class FileSplitterFetch extends Thread { '_GrD>P)- xfpa]Z ,5|&A String sURL; //File URL j<Bkj/ long nStartPos; //File Snippet Start Position )we}6sE" long nEndPos; //File Snippet End Position .} q&5v int nThreadID; //Thread's ID o<[#0T^K boolean bDownOver = false; //Downing is over |_] Q$q[[% boolean bStop = false; //Stop identical X#*JWQO= FileAccessI fileAccessI = null; //File Access interface U>cV| \!k1a^ZP H7d/X public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException zbk q { J&M
o%"[) this.sURL = sURL; t/cY=Wp this.nStartPos = nStart; j7jCm: this.nEndPos = nEnd; ;%<,IdhN nThreadID = id; 6kNrYom fileAccessI = new FileAccessI(sName,nStartPos);//定位 !9[>L@#G } )+[ gd/<C. P0W*C6&71| iH/6M public void run() d{SG
Cr 9d { Jth[DUH8H while(nStartPos < nEndPos && !bStop) n@C[@?D { W+PJZn x c/}#>ED E7.2T^o;M try{ Hkwl>R$ URL url = new URL(sURL); ^Pbk#|$rU HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q4+gAS9 httpConnection.setRequestProperty("User-Agent","NetFox"); LcUh;=r}& String sProperty = "bytes="+nStartPos+"-"; |y0(Q V httpConnection.setRequestProperty("RANGE",sProperty); ~$)2s7
O Utility.log(sProperty); L1cI`9 \P.I)n`8 y q(`/Vo4g( InputStream input = httpConnection.getInputStream(); Xc?&_\. + //logResponseHead(httpConnection); .?R!DYC` T)H{ H5Z$*4%G byte[] b = new byte[1024]; $,,op( int nRead; P*FMwrJj>r while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) IF44F3(V4 { "uaMk}[ <! nStartPos += fileAccessI.write(b,0,nRead); lfqiyYFm //if(nThreadID == 1) 9y<*8bI // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9~p[ } L<ue$' Dp)=0<$y sg$rzT-S4 Utility.log("Thread " + nThreadID + " is over!"); gj*+\3KO@a bDownOver = true; 1JztFix //nPos = fileAccessI.write (b,0,nRead); aX5
z&r:{ } .(^ ,z& catch(Exception e){e.printStackTrace ();} f33 l$pOp } ] lrWgm } n[G &ksQI "Y~:|?(@- >'&p>Ad) //打印回应的头信息 cc~O&?)i public void logResponseHead(HttpURLConnection con) n=y[CKS { 4\Tl\SZ? for(int i=1;;i++) P} 0%-JC { v":x4!kdX String header=con.getHeaderFieldKey(i); mt,OniU= Q if(header!=null) 0=AVW`J //responseHeaders.put(header,httpConnection.getHeaderField(header)); B56L1^7 Utility.log(header+" : "+con.getHeaderField(header)); !,6c ~ w else FB{KH . break; -OapVa c } ;<j0f~G` } yCVI\y\B @~YYD#'vNY \$*7 >`k public void splitterStop() ]x(e&fyHB { 5N/%v&1 bStop = true; 3|'>`!hb } #~C]ZrK xI($Uu}S /5Oa,NS7 } 1*9U1\z 8,?h~prc {q`jDDM /* +yk24
`> **FileAccess.java g*03{l#P *//文件访问(定位,写) 6L"%e!be6 package NetFox; Z0Vl+ import java.io.*; ,
udTvI }bdmomV +
HK8jCa public class FileAccessI implements Serializable{ #xX5,r0 B0dQ@Hq* //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 a&c6.#E{y RandomAccessFile oSavedFile; 925|bX6I long nPos; }BZ"S-hZ KK iE@_z 18+)`M-5o public FileAccessI() throws IOException l49*<nkmq { NQ(1 this("",0); WtG~('g>& } @+Si?8\ BJM.iXU)[ `*_mP<Ag public FileAccessI(String sName,long nPos) throws IOException [lWQ'DZ { lDYyqG4 oSavedFile = new RandomAccessFile(sName,"rw"); i rU 6D this.nPos = nPos; Y
}$/e oSavedFile.seek(nPos); ow_W%I=6 } {2=jAz'? A OISs4 9x>d[-#y:J public synchronized int write(byte[] b,int nStart,int nLen) -likj#Z { y\Ic@-aWI int n = -1; m1B+31'>^ try{ :N4t49i oSavedFile.write(b,nStart,nLen); Z4S!NDMm~ n = nLen; ~<_2WQ/$ } *h!28Ya(~ catch(IOException e) r+":' /[x { rH_\d?b e.printStackTrace (); }1Gv)l7 } Cd,jDPrw FbS|~Rp~ gW>uR3Ca4 return n; gQ'zW } oU056 g!lWu[d :S<f?*
}: } gl\\+VyU /?@3.3sl_ pGJ>O/% /* %?}33yV
**SiteInfoBean.java i~I%D%; */ 2NC.Z; package NetFox; bCo7*<I4 fZ0M%f =G7m)! public class SiteInfoBean { cq}EZ@ . }uJu>'1[G *5%d XixN private String sSiteURL; //Site's URL =Je[c,&j$? private String sFilePath; //Saved File's Path tnH2sHby private String sFileName; //Saved File's Name $*e2YQdLo private int nSplitter; //Count of Splited Downloading File `UD/}j@ /|tJ6T1LrB AK'[c+2[ public SiteInfoBean() Fq|Ni$ {//nSplitter的缺省值为5 z\K"Rg~J //default value of nSplitter is 5 41`n1:-] this("","","",5); R=gb' } ,\_1w ,K9*%rW) WI-&x
' public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) % tS,}ze { /t+f{VX$ sSiteURL= sURL; O(fM?4w sFilePath = sPath; 7gf05Z'= sFileName = sName; hQYL`Dni this.nSplitter = nSpiltter; D{GfLib"U F*IzQ(#HW >AVVEv18 } vdAr|4^qB ,:%CB"J "W6uV! public String getSSiteURL() ',9V|jvK { 't:;irLW. return sSiteURL; OI|[roMK } ojaws+(& y >_[9t t^+ik1. public void setSSiteURL(String value) );#JL0I { mk.9OhYY sSiteURL = value; uatm/o^~, } l4F%VR4KT 2BQ
j Cn,d?H public String getSFilePath() g;pcZ9o { s'!Cp=xQF" return sFilePath; d' !]ZWe } RIlwdt
]~9tYn /rK}?U public void setSFilePath(String value) (?n=33}Ci { uGwm
r sFilePath = value; 6n,i0W } |:nn>E}ZA/ cz
>V8 5eLtCsHz public String getSFileName() q
?|,O;? { |cK*~ return sFileName; vx>b^tJKC } `7c~mypx 00(on28b cr%"$1sY; public void setSFileName(String value) gwLf ' { YmL06<Mh sFileName = value; NP0\i1P>.? } T$>WE= Y i6^twK)j }JF13beU public int getNSplitter() 3
}duG/ {
[$mHv,~ return nSplitter; /KFfU1 }
SWH2 j_K4;k#r @Xt*Snd public void setNSplitter(int nCount) PC~Y8,A|.t { bGN:=Y' nSplitter = nCount; 6Y^23W F } &*##bA"!B } <fZyAa3} ?^7t'`zk aRj9E} /* $Ipg&`S" **Utility.java I@T8Iv= */ Z_$%. package NetFox; C^O
VB- =O&%c%~q (7vF/7BZ|_ public class Utility { HHA<IZ#;, 52%2R]G! vmU@^2JSJ public Utility() Z?6%;n^ 54 { 5&QJ7B,! MX$0Op caU0\VS } '9laa=H%8 fa-IhB1!K //线程睡眠 qB~rQPa public static void sleep(int nSecond) \z>fb%YW { `nUXDmdwzO try{ ),0g~'I~D
Thread.sleep(nSecond); d?ex,f. } gR&Q3jlIV catch(Exception e) SzAJ2:qhl { ! +a. Ei e.printStackTrace (); y=fx%~<>
8 } G/k2Pe{SL } vleS2-]| XeW<B0~ //日志 6g2a[6G5 public static void log(String sMsg) S'k_olx7 { I&2c&yO System.err.println(sMsg); IshKH- } 'KP@W9j n&L+wqJ 4;w;'3zq public static void log(int sMsg) sQ=]NF)\ { hB"fhX System.err.println(sMsg); {Bk[rCl } u__9Z:+ } s(5Y ]GMe\n jfP*"uUK /* rxe>}ZO **TestMethod.java ,-$LmECg */ 9eGyyZg package NetFox; 4qO+_!x{) 6w*dKInG[- x/NfZ5e0X public class TestMethod { QCD.YFM EOIN^4V" cbNTj$'b2u public TestMethod() F5LuSy+v { ///xx/weblogic60b2_win.exe l>2E (Y| try{ $~~Jw] SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); p2Z?T}fa}& //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); "An,Q82oHf SiteFileFetch fileFetch = new SiteFileFetch(bean); z#zI1Am(O fileFetch.start(); NvD7Krqwa } Qk0R a_ catch(Exception e){e.printStackTrace ();} D|lzGt Y#]+Tm(+ -j+UMlkB } 4~ q5,^kgB [^R^8k b[sx_b public static void main(String[] args) XtXEB<4Z { 8Ry3`ct new TestMethod(); &x=.$76 } F<ZYh } 7yG#Z)VE 点击下载更多相关资料
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