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/*
/Xz4q!Ul **SiteFileFetch.java >u)ZT */ JC"K{V{ package NetFox; T]|O/ import java.io.*; gn"&/M9E import java.net.*; OQ7c|O .e"Qv*[^ <dL04F public class SiteFileFetch extends Thread { X^Y9T`mQ} pCmJY Fw9``{4w SiteInfoBean siteInfoBean = null; //文件信息Bean nEm7&Gb long[] nStartPos; //开始位置 :*@|"4 long[] nEndPos; //结束位置 *$(CiyF! FileSplitterFetch[] fileSplitterFetch; //子线程对象 @(c<av? long nFileLength; //文件长度 @S7=6RKa[ boolean bFirst = true; //是否第一次取文件 H040-Q;S' boolean bStop = false; //停止标志 :
xZC7" File tmpFile; //文件下载的临时信息 aELT"b,x DataOutputStream output; //输出到文件的输出流 h!K2F~i{P ['emP1g~ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) %h"<
IA
S. public SiteFileFetch(SiteInfoBean bean) throws IOException A{2$hKqHi { txo?k/w siteInfoBean = bean; vB5iG|b} //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); +&,\ J9'B tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); PAwg&._K if(tmpFile.exists ()) [T]qm7
? { O{#Cddt:r bFirst = false; X-$td~r read_nPos(); |u"R(7N* } !>y}Xq{bm3 else P$/A! r { oRThJ B nStartPos = new long[bean.getNSplitter()]; R0mT/h2 nEndPos = new long[bean.getNSplitter()]; d:pm|C|F } )ek 5 8.Ef 5-m W4*BR_H&* R%_H\-wo } K4/P(*r` "tB"j9Jb %C6zXiO" public void run() Gd6 ;'ZCmY { c9TAV,/fF* //获得文件长度 WFB|lNf& //分割文件 SE9u2Jk //实例FileSplitterFetch $v<hW
A]> //启动FileSplitterFetch线程 Xb@z7X#O! //等待子线程返回 gQd=0"MV try{ gVA}?t; if(bFirst) tD7C7m { 8^/Ek<Qb| nFileLength = getFileSize(); O;BMwg_7 if(nFileLength == -1) B
Ff.Rd95 { h"1"h. System.err.println("File Length is not known!"); *!]Epb } bC4*w
O else if(nFileLength == -2) Qv0>Pf { - )a_ub System.err.println("File is not access!"); 7cmr
*y } y~c4:*L3 else k3/JQ]'D { zHoO?tGf for(int i=0;i<nStartPos.length;i++) z?uQlm*We { $F@L$&~ nStartPos = (long)(i*(nFileLength/nStartPos.length)); D0y,TF } 76_8e{zbr for(int i=0;i<nEndPos.length-1;i++) v(@+6#& { xK),:+G( nEndPos = nStartPos[i+1]; &>zy_) } b!5tFX;J nEndPos[nEndPos.length-1] = nFileLength; a EFe!_QY } v>y8s&/ } :Bv&)RK ? W2I1HEy 8~s-t //启动子线程 wO_pcNYZ8 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; i5E:FS^!I for(int i=0;i<nStartPos.length;i++) ;sck+FP7w { Sp`fh7d.( fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $-fj rQ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), |Y8Mk2,s nStartPos,nEndPos,i); i_9Cc$Qh< Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Y6f+__O fileSplitterFetch.start(); cGpN4|*rQ } qD$GKN. // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), J]|6l/i siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [!:-m61 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Wp7@ nEndPos = " + nFileLength); }/7.+yD // fileSplitterFetch[nPos.length-1].start(); MgH1d&R ]U#[\ Z RP`GG+K //等待子线程结束 @;m@Luk //int count = 0; m|nL!Wc //是否结束while循环 -n=$[-w boolean breakWhile = false; G%j/eTTf ^:cb
$9F =2;mxJ# o while(!bStop) yd0=h7s { 5I)~4.U|,m write_nPos(); &e HM#as Utility.sleep(500); ?O<`h~'$+ breakWhile = true; cwM#X;FGq
+
4V1>e+ nCffBc for(int i=0;i<nStartPos.length;i++) `Ct'/h{
{ Xc8= 2n if(!fileSplitterFetch.bDownOver) [D<RV3x9 { 0okO+QU,a breakWhile = false; ~{1/* &P break; (<]\,pP0_ } _XY`UZ } HsjELbH if(breakWhile) ]=?X*,' break; ueWR/ xUiWiOihr6 9:9N)cNvfX //count++; JAGi""3HG //if(count>4) ;xW8Z<\- // siteStop(); gZ`32fB% } *}
*!+C3 BB2_J=wA w|!YoMk+o System.err.println("文件下载结束!"); tsTR2+GZS } Z-^uM`],G catch(Exception e){e.printStackTrace ();} O3^98n2 } '2Q.~6 {\vI9cni|" o9KyAP$2 //获得文件长度 olD@W
UB public long getFileSize() l?[{?Luq { f
pv= P int nFileLength = -1; JYZ2k=zh try{ 7>nhIp)) URL url = new URL(siteInfoBean.getSSiteURL()); +8LM~voB HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,~?A,9?%: httpConnection.setRequestProperty("User-Agent","NetFox"); J-t=1 eVqM=%Q JDC=J(B int responseCode=httpConnection.getResponseCode(); nwa\Lrh if(responseCode>=400) ;yk9(wea}" { @wd!&%yzO processErrorCode(responseCode); E/"YId `A return -2; //-2 represent access is error ~pHJ0g:t } h|J;6Sm@ 2x-'>i_|g a~8:rW^ String sHeader; aqcFY8b
' ??%)|nj. U>/<6Wd for(int i=1;;i++) IY];Ss&i { bin6i2b //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ]*bAF^8i //Utility.log(in.readLine()); XHWh'G9 sHeader=httpConnection.getHeaderFieldKey(i); J|n(dVen/ if(sHeader!=null) 2-B6IPeI { 9uA,
+ if(sHeader.equals("Content-Length")) Y*5Z)h
1 { 7ZS>1 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); UJ7'JBT=k break; >}-~rZ } `)rg|~#k } |?\gEY-Se else qru2h #
break; PYdIP\<V } 5."5IjZu } U8 Z~Y}29 catch(IOException e){e.printStackTrace ();} ' oBo| catch(Exception e){e.printStackTrace ();} l'|E,N>X \BN|?r$a ^H'hD Utility.log(nFileLength); J9g|#1G @''&nRC1 w@87]/ 4Rq return nFileLength; _aVJ$N. } /)sDnJ1r /0Z|+L9Jo zl0;84:H //保存下载信息(文件指针位置) t[%x}0FP-F private void write_nPos() ^Ku\l #B { ~RcNZ\2y try{ VT'0DQ!NIq output = new DataOutputStream(new FileOutputStream(tmpFile)); ^Y$QR] output.writeInt(nStartPos.length); {d| |q<.- for(int i=0;i<nStartPos.length;i++) 7@FDBjq { 0Xp
nbB~~I // output.writeLong(nPos); qpoquWZ output.writeLong(fileSplitterFetch.nStartPos); |a%B|CX output.writeLong(fileSplitterFetch.nEndPos); tJff+n> } iwvt%7 output.close(); Vre=%bGw } dAL0.>|`0 catch(IOException e){e.printStackTrace ();} (RExV?: catch(Exception e){e.printStackTrace ();} Kl2}o|b } #>BX/O*D $+7 ci~gs *U
M!( //读取保存的下载信息(文件指针位置) g8KY`MBnC& private void read_nPos() 3 sl=>;- { K*[9j 0 try{ l(gJLjTH% DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); kzMa+(fu int nCount = input.readInt(); FQ U\0<5 nStartPos = new long[nCount]; pG(Fz0b{ nEndPos = new long[nCount]; AU/#b(mI for(int i=0;i<nStartPos.length;i++) HF]EU!OT { =PV/`I_h nStartPos = input.readLong(); A1Ka(3" nEndPos = input.readLong(); ,`yyR:F } FtN}]@F input.close(); "2%>M } <3lUV7! catch(IOException e){e.printStackTrace ();} FW_G\W. catch(Exception e){e.printStackTrace ();} UkZ\cc}aC/ } h!v/s=8c R0vww_fz l^ARW
E private void processErrorCode(int nErrorCode) 4\\.n { ?d4Boe0-a2 System.err.println("Error Code : " + nErrorCode); MO-!TZ+6 } lu]o34 `YU=~xQ %Z7%jma //停止文件下载 Nl
{7 public void siteStop() $6#
lTYN~ { yQ'eu;+] bStop = true; "?P[9x} for(int i=0;i<nStartPos.length;i++) vnTq6:f#M fileSplitterFetch.splitterStop(); ^Z#@3= .9OFryo 3?@?-q2g } IO"hF } c yP,[?N //负责部分文件的抓取 Sl"BK0:%7 **FileSplitterFetch.java ;T>+, */ 0yz~W(tsm package NetFox; 'PpZ/ry$ +bUW!$G ~p\n&{P0 import java.io.*; >fH*XP>( import java.net.*; )&,K94
.TJ">? Ig9d#c public class FileSplitterFetch extends Thread { NF mc>0- dMV=jJ%Y L,$3Yj String sURL; //File URL q$T8bh,2 long nStartPos; //File Snippet Start Position _f|/*.
@Q long nEndPos; //File Snippet End Position 3fp> 4;ym' int nThreadID; //Thread's ID +ubnx{VC boolean bDownOver = false; //Downing is over '_0 boolean bStop = false; //Stop identical 3;l "=#5 FileAccessI fileAccessI = null; //File Access interface 5kn+
>{jh` ,Kw5Ro`I: :6D0j public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException TBnvV 5_ { aMJ;bQD
this.sURL = sURL; kiX%3( this.nStartPos = nStart; .$0Pr%0pWI this.nEndPos = nEnd; $;`I,k$0>~ nThreadID = id; 62\&RRB
i fileAccessI = new FileAccessI(sName,nStartPos);//定位 E FY@Y[ } ST;t,
D: A5nO= H l<$a"K7\ public void run() [BDGR
B7d" { v}[dnG while(nStartPos < nEndPos && !bStop) "b,%8 { z$[C#5+2 Jpj!rXTX* !')y&7a~ try{ ;t(f1rPyE URL url = new URL(sURL); Zyye%Ly HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); e@n!x}t8 httpConnection.setRequestProperty("User-Agent","NetFox"); MGt]' } String sProperty = "bytes="+nStartPos+"-"; J|~26lG httpConnection.setRequestProperty("RANGE",sProperty); gEJi[E@ Utility.log(sProperty); BfmsMW uk7'K 0j tIuoD+AW InputStream input = httpConnection.getInputStream(); EKZVF`L //logResponseHead(httpConnection); la^
DjHA$ PQ U]l"A %2l7Hmp4H byte[] b = new byte[1024]; *xs!5|n+ int nRead; HY}j!X while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Fn|gVR { Lm%GR[tyQ nStartPos += fileAccessI.write(b,0,nRead); Y+-xvx
: //if(nThreadID == 1) "!UVs+)] // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); P?ep] } y,Q5;$w8 P0GeZ02] <7sIm^N Utility.log("Thread " + nThreadID + " is over!"); uCP>y6I bDownOver = true; 7Z,/g|s}z //nPos = fileAccessI.write (b,0,nRead); 7^:4A' } }1H=wg>\ catch(Exception e){e.printStackTrace ();} Oejq@iM"( } Z)"61)
) } EeQ5vqU h{iEZ# w
YNloU //打印回应的头信息 w!3>N"em public void logResponseHead(HttpURLConnection con) 4sFv?W { Qvoqx>2p5 for(int i=1;;i++) 5z/Er".P { oduDA: String header=con.getHeaderFieldKey(i); DPDe>3Mi[ if(header!=null) &eZfQ27$ //responseHeaders.put(header,httpConnection.getHeaderField(header)); L2z2}U=< Utility.log(header+" : "+con.getHeaderField(header)); /!xF?OmVd else v> z@ break; ,TC;{ $O5 } v:_B kHN' } `k{& /] 6tjcAsV |QZ58)> public void splitterStop() j) vlM+ { yubSj* bStop = true; h5zVGr } %"$@%"8;3 F@<0s&)1 T=Z.U$ } >`T5]_a U yqXMbw@ deX5yrvOie /* A7XnHPIw **FileAccess.java <eN R8(P *//文件访问(定位,写) JqU ADm package NetFox; !^fa.I'mM import java.io.*; $ItF])Bj5N vP-M,4c t2{~bzq1X public class FileAccessI implements Serializable{ Z'v-F^ ]rBM5~ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 v6a]1B RandomAccessFile oSavedFile; ^(x^6d long nPos; Bstk{&ew x2VBm$> WgR4Ix^L# public FileAccessI() throws IOException }odV_WT { ,t$,idcT+ this("",0); kUHE\L.Y] } Zf*r2t1&P ZFh+x@ %i{;r35M;9 public FileAccessI(String sName,long nPos) throws IOException *e"a0 { cd@.zg'sYn oSavedFile = new RandomAccessFile(sName,"rw"); 8%{q%+ this.nPos = nPos; !UBO_X%dz oSavedFile.seek(nPos); B)SLG]72f } vFmJ;J vxlOh.a|/L wzcai
0y* public synchronized int write(byte[] b,int nStart,int nLen) USML~]G
z { #TJk-1XM*q int n = -1; m@xi0t try{ oUDVy_k oSavedFile.write(b,nStart,nLen); |VH!)vD n = nLen; !|wzf+V } eOlKbJU catch(IOException e) |?m` xO { tV;%J4E' e.printStackTrace (); HaNboYW_K } wNCCH55Pt /ci]}`'ws ,%"xH4d return n; h+UnZfm } ,8Iv9M}2 m 40m<@ JHV)ZOO } &M&{yc*% A]`:VC=IU <_S@6? /* QOFvsJ<s **SiteInfoBean.java H:&?ha,9 */ >O`l8tM package NetFox; eBW=^B"y+ Jcf"#u-Q/ P8yIegPY public class SiteInfoBean { 8}p8r|d!ls <EX7WA |(IO=V4P private String sSiteURL; //Site's URL 0OZ Mlt%z private String sFilePath; //Saved File's Path LC69td& private String sFileName; //Saved File's Name w:=V@-S8 private int nSplitter; //Count of Splited Downloading File (-yl|NFBw T`YwJ6N |WQ9a' ' public SiteInfoBean() gvavs+H% {//nSplitter的缺省值为5 cA`4:gp //default value of nSplitter is 5 ~4 #B'Gy[ this("","","",5); Wsz0yHD[` } &k>aP0k" `$;+g , @uleyB public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 3 x*z\VJ { 0~A#>R' sSiteURL= sURL; eb:A1f4L sFilePath = sPath; u</8w&! sFileName = sName; I+?hG6NM this.nSplitter = nSpiltter; rs8\)\z B&KL2&Z~Pq {ShgJ;! Q } mB 55PYA 3Kq`<B~% \ {|ImCH public String getSSiteURL() x-m/SI]_N { 9M$/=>^
Z return sSiteURL; ?Hz2-Cn } c$M%G)P /Bv#) -5 y.a]r7 public void setSSiteURL(String value) 5N/Lk>p1u { I*)VZW sSiteURL = value; >9K//co"of } n]? WCG}cd 0&w0aP`Y }p3b#fAr public String getSFilePath() j
BS4vvX? { .(Y6$[#@ return sFilePath; XX; 6 P } Opg#*w%- [=M% |7F*MP public void setSFilePath(String value) K'b*A$5o { L4'[XcY sFilePath = value; wz(K*FP } 440FhDMj pWaPC/,g /p`&;/V| public String getSFileName() 5D`26dB2 { f05d ; return sFileName; zmFws-+A } ~9M!)\~ ;IP~Tb]& D!3{gV# public void setSFileName(String value) v548ysE) { 5G*II_j sFileName = value; R 1zC.m } p8>%Mflf &r_uQbx TUTe9;) public int getNSplitter() |r=DBd3 { )2j:z#'> return nSplitter; bKz{wm% } 3VO:+mT \HSicV#i ?Myh7 public void setNSplitter(int nCount) O.\h'3C { 7sV/_3H+ nSplitter = nCount; uH{'gd,q8 } 5w3Fqu>39? } 78Y@OL_$ h8v>zNf' rG6\ynBX% /* X0i3 _RVa **Utility.java h}Ygb-uZ */ mnQ'X-q3iO package NetFox; 4F#%f#" `iYc<N` :t$A8+A+0 public class Utility { {8CWWfHCD &=w|vB)(p UzQ$B> f public Utility() avNLV { aqL<v94wX $Z6D:"K f%Ke8'& } UxqWnHH.` Q1V2pP+=@ //线程睡眠 /~hbOs/
L public static void sleep(int nSecond) 2VYvO=KA { UKs$W` try{ g [L Thread.sleep(nSecond); htHv& }
azGnP3_ catch(Exception e) @PXXt# { y^s1t2]%
e.printStackTrace (); n2'|.y}Um: } P;GprJ`l } qx%jAs+~ n7iE8SK|k //日志 $
I<|-]u public static void log(String sMsg) l>Av5g)
{ h$&rE@N| System.err.println(sMsg); Czu1 )y } DTy/jaK ,cQA*;6 n-OWwev) public static void log(int sMsg) e^frVEV { 6\`DlUn'* System.err.println(sMsg); r$DZkMue } 9[{sEg=C$e } yWuIu>VJ U.Hdbmix B\zoJg&7( /* 04\Ta **TestMethod.java 2IzfP;V? */ ]Zv, package NetFox; 'A1E^rl]= GZ,j?@ m9I(TOw public class TestMethod { )BpIxWd? e
sGlMq 2D_6 public TestMethod() ULck { ///xx/weblogic60b2_win.exe QU%N*bFW%P try{ ]3 j[3' SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); #4lHaFq //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 8nf4Jk8r SiteFileFetch fileFetch = new SiteFileFetch(bean); kp.|gzA6 fileFetch.start(); Es:5yX! } ec#_olG% catch(Exception e){e.printStackTrace ();} e00RT1L uiuTv)pwF VAt>ji7c } QdirE4W ~{9x6<g! R rxRa[{Z public static void main(String[] args) zQ=aey% { 2-P I JO new TestMethod(); Od*v5qT;$ } 83B\+]{hD } A?\h|u< 点击下载更多相关资料
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