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/* E`uaE=Mdq **SiteFileFetch.java e*2&s5 #RT */ (Ef2
w[' package NetFox; B_"OA3d_ import java.io.*; NnLhJPh import java.net.*; m/hi~.D9 ~26s7S} %rDmW?T public class SiteFileFetch extends Thread { AIl$qPKj& oIvnF:c vbA7I<; SiteInfoBean siteInfoBean = null; //文件信息Bean A2|o=mOH long[] nStartPos; //开始位置 ))IgB).3M long[] nEndPos; //结束位置 AO}i@YJth FileSplitterFetch[] fileSplitterFetch; //子线程对象 _Hd1sx long nFileLength; //文件长度 <a+eF}*2 boolean bFirst = true; //是否第一次取文件
sO6g IPU^ boolean bStop = false; //停止标志 -[=AlqL File tmpFile; //文件下载的临时信息
AZy~Q9Kc DataOutputStream output; //输出到文件的输出流 &AQ;ze 9IvcKzS2 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) %kZ~xbY public SiteFileFetch(SiteInfoBean bean) throws IOException l0caP( { sh
!~T<yy siteInfoBean = bean; u1;e*ty //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); X(!AI|6Bt tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); VX!Y`y^a if(tmpFile.exists ()) 2JA&{ch { %<wQ bFirst = false; 3j+=3n, read_nPos(); y4/>Ol] }
N8kb-2 else i_0,BVC { WAwfL? nStartPos = new long[bean.getNSplitter()]; 9*=@/1 nEndPos = new long[bean.getNSplitter()]; qX
p,d } 1akD]Z F9k
I'<Q Q"OV>kl k tB ,. } g]Xzio&w d4p{5F7]^ ^A11h6I public void run() })zB". { K=m9H=IX~T //获得文件长度 J-, H6u //分割文件 MdVCD^B //实例FileSplitterFetch 84p[N8 //启动FileSplitterFetch线程 !bZhj3. //等待子线程返回 piYws<Q try{ Bbl)3$`, if(bFirst) O^X[9vrW { 'YZI>V* nFileLength = getFileSize(); vZ[$H if(nFileLength == -1) ZVdsxo< { QN5yBa!Wz System.err.println("File Length is not known!"); Q{qj } V@#*``M,3 else if(nFileLength == -2) *R_'$+ { >9o,S3 System.err.println("File is not access!"); z"6ZDC6 } 7>PF ~= else 4f4 i1i: { t+=1 2{9;f for(int i=0;i<nStartPos.length;i++) Ad]<e?oN= { ']d!?>C@o nStartPos = (long)(i*(nFileLength/nStartPos.length)); jiA5oX^g } 4V u'r? for(int i=0;i<nEndPos.length-1;i++) _W@,@hOH { fa!3/X+ nEndPos = nStartPos[i+1]; 85r)>aCMn } f
MY; nEndPos[nEndPos.length-1] = nFileLength; M^j<J0(O } F!OOrW]p0 } h1^9tz{ ,+ns
{ppn ;[{:'^n //启动子线程 z:Xj_ `p fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; N,j>;x3xT for(int i=0;i<nStartPos.length;i++) !lQ#sL` { Z?~gQ
$ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `e'G.@ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), .k# N7[q= nStartPos,nEndPos,i); -yX.Jv Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); CRZi;7`*1 fileSplitterFetch.start(); js:C
mnI } do:QH.q8) // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), GXOFk7> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); l `fW{lh // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8 A2if9E3 nEndPos = " + nFileLength); 5TXg;v#Z // fileSplitterFetch[nPos.length-1].start(); KY4d+~2 -W|*fKN`3 u^`eKak"l //等待子线程结束 Z|2Eb* //int count = 0; &mh Ln4^ //是否结束while循环 d^KBIz8$5l boolean breakWhile = false; ]s*5[=uc2 3C277nx KqN!?anPr while(!bStop) 5a=nF9/ { .cw!ls7d write_nPos(); "DVt3E Utility.sleep(500); 25x cD1* breakWhile = true; N=>- Q) Q,zC_ +?qf`p.{ for(int i=0;i<nStartPos.length;i++)
n=f`AmF; { iKg75%;t if(!fileSplitterFetch.bDownOver) |'ZN!2u { X3P&"}a breakWhile = false; IYuyj(/! break; &g*klt'B } |.1qy,|!X } 98BYtxa if(breakWhile) $GQphXb$ break; .W!tveX8- uVN.= >HE,' //count++; iPMB$SdfO //if(count>4) ,+~2&>wj // siteStop(); Q2*/`L}m\ } N1PECLS? zLh Fbyn( {J{1`@ System.err.println("文件下载结束!"); pp(H
PKs=} } 2*+3RrJ catch(Exception e){e.printStackTrace ();} g<fP:/ } Uf# PoQ!y T}UT7W| T'hml //获得文件长度 &kb\,mQ public long getFileSize() Q`N18I3 { v#zPH5xo int nFileLength = -1; d{W}p~UbH try{ rqF"QU= l URL url = new URL(siteInfoBean.getSSiteURL()); G]b8]3^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [1NaH httpConnection.setRequestProperty("User-Agent","NetFox"); i#k-)N _$ H \ 3M *]5z^>
q;7 int responseCode=httpConnection.getResponseCode(); *%3oyWwCd if(responseCode>=400) x7f:F. { !;i*\
a processErrorCode(responseCode); USprsaj return -2; //-2 represent access is error FS8S68 } j5zFDh1( Z)NrhJC T$u~E1 String sHeader; 7k `_# dPHw3^J0j "r@G@pe for(int i=1;;i++) U M@naU { d^tVD`Fm //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); *MI)]S //Utility.log(in.readLine()); vEF=e sHeader=httpConnection.getHeaderFieldKey(i); PQ,+hq if(sHeader!=null) 2sUbiDe- { )i @1XH"D if(sHeader.equals("Content-Length")) &RWM<6JP { KCD5*xH nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Fqo&3+J4 break; d]MGN^%o } 90p3V\LO } u)7*Rj^ else Hr6wgYPi break; H "O$& } B3Mx,uXT\ } 4Hk6b09 catch(IOException e){e.printStackTrace ();} r
^MiRa catch(Exception e){e.printStackTrace ();} mk\i}U>` y<|)'( h`lmC]X_ Utility.log(nFileLength); lcCJ?!lsSW *E}Oh dQai4e>[ return nFileLength; [yC"el6PM } Ae6("Oid FRgLlp8x FOSbe] //保存下载信息(文件指针位置) @HvScg*Y private void write_nPos() QNb>rLj52 { dhW<p5 try{ ge$LIsE8 output = new DataOutputStream(new FileOutputStream(tmpFile)); (`pNXQ0n output.writeInt(nStartPos.length); Q<yAT(w for(int i=0;i<nStartPos.length;i++) *2=W5LaK. { ywEDy|Wn$~ // output.writeLong(nPos); QF.3c6O@ output.writeLong(fileSplitterFetch.nStartPos); _W |R;Cz] output.writeLong(fileSplitterFetch.nEndPos); gH'_ymT=
3 } { V0>iN:~S output.close(); 7
5|pp } %9X{{_ catch(IOException e){e.printStackTrace ();} s@s/'^` catch(Exception e){e.printStackTrace ();} H UkerV } 2 h<U y@`~ 9$ /VO^5Dnb //读取保存的下载信息(文件指针位置) wLUF v(&C private void read_nPos() U{}!y3[wK { tOM(U-7Z& try{ Px#$uU DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); wyzOcx>M int nCount = input.readInt(); |!Fk2Je, nStartPos = new long[nCount]; ]^ #`j nEndPos = new long[nCount]; zP&q7 t;> for(int i=0;i<nStartPos.length;i++) ZBJ3 VK { EE]=f=3 nStartPos = input.readLong(); .'/l'> nEndPos = input.readLong(); .H2qs{N! } FCiq?@ input.close(); w" JGO } zKxvN3! catch(IOException e){e.printStackTrace ();} .LObOR5J7 catch(Exception e){e.printStackTrace ();} h@@d{{IqT } 4uUs7T ~ezCu_ qm'b'!gq~ private void processErrorCode(int nErrorCode) B+Z13;}B { "yW&<7u1 System.err.println("Error Code : " + nErrorCode); 7)J6/(' } {a@>6) q^*6C[G B E/mw* c^ //停止文件下载 i3PKqlp. public void siteStop() 2tf6GX: { E:w:4[neh bStop = true; g~!$i`_b for(int i=0;i<nStartPos.length;i++) vCb]%sd-U fileSplitterFetch.splitterStop(); q}wj}t# {6O0.}q]& )o jDRJ& } [(|v`qMv/g }
rN"Xz //负责部分文件的抓取 }lP 5GT2 **FileSplitterFetch.java /C$
xH@bb */ `?9T~, package NetFox; 8QF2^*RZ7z *QH[,F`I M3(k'q7&: import java.io.*; T4r5s import java.net.*; '9J*6uXf. 6^E`Sa!s M4?8xuC public class FileSplitterFetch extends Thread { gvyT-XI kXwi{P3D$ %LQ/q3?_ String sURL; //File URL .GCR!V long nStartPos; //File Snippet Start Position ?4G(N=/& long nEndPos; //File Snippet End Position JMlV@t7y< int nThreadID; //Thread's ID 1,`H:%z% boolean bDownOver = false; //Downing is over \A<v=VM| boolean bStop = false; //Stop identical k)":v3^ FileAccessI fileAccessI = null; //File Access interface +O+<Go@a V"#Jk!k9k Au5rR>W public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException O
k7zpq { ZJ(rG((! this.sURL = sURL; %>y;zqZIU this.nStartPos = nStart; QaQ'OrP
this.nEndPos = nEnd; p<5!02yQ\ nThreadID = id; } 0M{A+ fileAccessI = new FileAccessI(sName,nStartPos);//定位 8Kk\*8 < } OCnFEX" 0E6lmz`O Rri`dmH public void run() 6Cc7ejt|u { VT=K"`EpQ while(nStartPos < nEndPos && !bStop) m xJXL":| { PAZ$_eSK6 = .`jjDJ Ld(NhB'7 try{ }U[-44r: URL url = new URL(sURL); 9y^/GwUQ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); I:$"E%
>= httpConnection.setRequestProperty("User-Agent","NetFox"); {QQl$ys/ String sProperty = "bytes="+nStartPos+"-"; #$'FSy# httpConnection.setRequestProperty("RANGE",sProperty); fbC~WV# Utility.log(sProperty); ;6m;M63 z .Yx_:h=u y3IWfiz>/d InputStream input = httpConnection.getInputStream(); wsnK3tM7- //logResponseHead(httpConnection); 8h.V4/? ^%#grX# gyu6YD8L byte[] b = new byte[1024]; }c|U X
ZW int nRead; !/hsJ9 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 2P9J'
L { B QjGv?p0s nStartPos += fileAccessI.write(b,0,nRead); n?E}b$6 //if(nThreadID == 1) Fr5 Xp // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3z[$4L'. } 2z\;Q8g){r p=gX!4,9< S "
pI Utility.log("Thread " + nThreadID + " is over!"); kuKa8c bDownOver = true; iiNSDc //nPos = fileAccessI.write (b,0,nRead); `.^ |]|u } u) *Kws catch(Exception e){e.printStackTrace ();} WRpyr } .y): Rh^ } AK2WN#u@Z n29(!10Px j*zD0I] //打印回应的头信息 q;A;H)?g public void logResponseHead(HttpURLConnection con) CMl~=[foW { 'M/([|@ for(int i=1;;i++) Dp!zk}f| { {gU&%j String header=con.getHeaderFieldKey(i); ;dQAV\ if(header!=null) #H5=a6E+q //responseHeaders.put(header,httpConnection.getHeaderField(header)); -]XP2}#d Utility.log(header+" : "+con.getHeaderField(header)); r:9gf?(& else y=H@6$2EQ break; >n$!< } &mkpJF/ } %Kto.Xq W3JF5* .zC*Z&e,.[ public void splitterStop() A';QuWdT { {p/YCch, bStop = true; \:&@;!a } A3+6#?:; $s gH'/> T+CajSV } /Ox)|)l g7V_[R(6 <B[G |FY, /* m,tXE%l **FileAccess.java 'HaD~pa *//文件访问(定位,写) 4JO@BV >t package NetFox; +jV_Wz import java.io.*; $f-hUOuyo li/aN g>0vm2| public class FileAccessI implements Serializable{ c K <)$* P))^vUt~ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 FFzH!=7T? RandomAccessFile oSavedFile; rC }}r!! long nPos; (vyz;Ob `}8&E(< geGeZ5+B public FileAccessI() throws IOException r<yhI>>;< { PRr*]$\&Mj this("",0); fL6e?\Pw } xPC"c* p538r[f< DTY<0Q. public FileAccessI(String sName,long nPos) throws IOException FvXqggfGv { `X8@/wf# oSavedFile = new RandomAccessFile(sName,"rw"); z<n-Gzwk this.nPos = nPos; tXq)nfGe{ oSavedFile.seek(nPos); ! OE*z $\ } IXq(jhm8bL CqoG.1jJS G{lcYP O public synchronized int write(byte[] b,int nStart,int nLen) N|dD! { $p$dKH int n = -1; @ 4UxRp6+ try{ QLr9dnA oSavedFile.write(b,nStart,nLen); I}.i@d'O n = nLen; O\Eqr?%L) } E zT`,#b catch(IOException e) Ly #_?\bn { AsxD}Nw[Z* e.printStackTrace (); nk@atK,38^ } n=!uNu7 /QxlGfNZ r88"#C6E' return n; p'Bm8=AwD } ~W{-Q. Q5n`F5 bToq$%sCg } 3W&S.$l $a#H,Xv# 658^"]Rk'/ /* {eHAg<+ **SiteInfoBean.java @x{`\AM|% */ dULS^i@@ package NetFox; q|dH~BK .<&s%{EW ' Q7Y-V public class SiteInfoBean { 8Y{s;U0n kiUk4&1 pIO4,VL;W private String sSiteURL; //Site's URL T>d.# private String sFilePath; //Saved File's Path 1FERmf? ?d private String sFileName; //Saved File's Name o0I9M?lP private int nSplitter; //Count of Splited Downloading File I:=dG[\h2 ]<trA$ 0 ls|LCQPx public SiteInfoBean() 82:Wvp6 {//nSplitter的缺省值为5 x` /)g( //default value of nSplitter is 5 "/+zMLY this("","","",5); Qn+:/zA; } b2)\
MNH K1q+~4>\| T*>`,}J public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) < bUe/m { ,+1m`9} sSiteURL= sURL; X.#oEmA,P sFilePath = sPath; ;L"!I3dM) sFileName = sName;
}31ZX this.nSplitter = nSpiltter; &m'kI zG9|K ?IhB-fd>@ } @,OT/egF4: $g\&5sstE QMp rv*i public String getSSiteURL() ]r/^9XaqtA { d7Ro}>lp return sSiteURL; wij,N(,H } _D;@v?n6!O mG2'Y) Sz E4oz|2!m public void setSSiteURL(String value) m&Y i!7@( { C/@LZ OEL sSiteURL = value; I.jZ
wW!r } 8l+H"M&| k*Nr!Z!} #I0pYA2m public String getSFilePath() jAhP>
t: { B6M+mx"G return sFilePath; SoQR#(73HK } \k@$~}xD, *75YGD Gt-UJ-RR y public void setSFilePath(String value) B!S 167Op { )u} Q:`9 sFilePath = value; {=Q7m`1 } _GA$6#] ( [E]_Q A o/vp-e public String getSFileName() Z S|WnMH { M"Y0jQ( return sFileName;
"lVqU } l|"6yB | [M+tB"_ ,T5u'"; public void setSFileName(String value) I0Ia6w9 { ?ny= sFileName = value; uh3)0.nR } xBM>u,0.F `'4)q}bB =
[@)R!3H public int getNSplitter() :nJgwp()@ { ?vtX"Fdz return nSplitter; &xd.Qi2 } i!H!;z# Va<eusl /bVZ::A&_ public void setNSplitter(int nCount) YZwaD b { J7$_VP nSplitter = nCount; n! h7 } S-Fo } 4YROB912 a\5FAkI {E_{JB~` /* 2KJ1V+g@a6 **Utility.java p~jlx~1-] */ &X>7n~@0 package NetFox; 5f7zk kuMKX`_ 1Y/$,Oa5 public class Utility { Im72Vt:p- ot%.M*h- _^S]g mE public Utility() C"pB"^0 { 7}o/: HIc a nk OM83S|1s } uGH?N LF<wt2?* //线程睡眠 -_A$DM!^=w public static void sleep(int nSecond) \Ad7
G i~ { t%VDRZo7 try{ ]`o!1( GA Thread.sleep(nSecond); Ud%s^A-qS } =\kMXB catch(Exception e) {3\R|tZh,` { wxQ>ifi9Z e.printStackTrace (); %j,iAUE< } ^rAa"p 9 } +OaUP*\Dd /pH(WHT+/H //日志 U>qHn'M public static void log(String sMsg) ODw`E9 { h1D?=M\9 System.err.println(sMsg); |L3X_Me } |`rJJFA j]4,<ppWSH vDj;>VE2b public static void log(int sMsg) m.Lij!0 { B;#J"6w System.err.println(sMsg); k[|~NLB8 } ixfdO\nU } Y}G_Z#- ! IVvtX} b'p4wE> /* n.6T
OF **TestMethod.java Xz{~3ih */ 7:=k`yS, package NetFox; R[[ ,q:4
m]Y;c_DO: M!m?#xz'c public class TestMethod { t;qP']2
U]6&b &m^@9E)S/ public TestMethod() KM,|} .@: { ///xx/weblogic60b2_win.exe A$/\1282 try{ :%rS
=f SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); XVVD 0^ Q //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ]1`g^Z@ 0 SiteFileFetch fileFetch = new SiteFileFetch(bean);
WY fileFetch.start(); [j,txe?n } #&.]"
d catch(Exception e){e.printStackTrace ();} &p(0K4: wVl+]zB GC@+V|u } =6 r:A<F!n 7N8H)X J1ON,&[J public static void main(String[] args) BzJ;%ywS { A&5:ATQ/| new TestMethod(); L1m{]>{- } cDEJk?3+ } %8.J=B 点击下载更多相关资料
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