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/* pim!.=vN/U **SiteFileFetch.java R.yC(r */ \Rp-;.I@6 package NetFox; * cgI.+ import java.io.*; ?W)A import java.net.*; vMm1Z5S/ 6E^.7%3 |fHV2Y`:g public class SiteFileFetch extends Thread { v+X)Qmzf~ 6#HK'7ClL u4/kR SiteInfoBean siteInfoBean = null; //文件信息Bean {o>j6RS\ long[] nStartPos; //开始位置 nYX@J6! long[] nEndPos; //结束位置 -&-Ma,M? FileSplitterFetch[] fileSplitterFetch; //子线程对象 N9v1[~ bv_ long nFileLength; //文件长度 SF>c\eTtx boolean bFirst = true; //是否第一次取文件 c5u@pvSP boolean bStop = false; //停止标志 i ~{Ufi File tmpFile; //文件下载的临时信息 ekWePL;rR2 DataOutputStream output; //输出到文件的输出流 f>N!wgo[ CL+}|7O( //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) #N`~xZ|$ public SiteFileFetch(SiteInfoBean bean) throws IOException *exS6@N] { e8GEoD siteInfoBean = bean; <kx&w(= //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); * iF]n2g: tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); !y@6Mm if(tmpFile.exists ()) CW,Wx: Y { l\@)y4
+ bFirst = false; ::}{_ Z read_nPos(); ;JayoJ } FgB&b else [m|YWT= { ~4 `5tb nStartPos = new long[bean.getNSplitter()]; Np"exFqN k nEndPos = new long[bean.getNSplitter()]; j'HZ\_ } 70eb]\% R~S;sJ& c Z\k&gio5C^ \Hn>oonph } lx[oaCr ,"HL~2:~ Kq;8=xP[ public void run() _Nqt21sL { /,g ,Ch<d //获得文件长度 r(RKwr:m //分割文件 pLLGus+W //实例FileSplitterFetch Bi
@2 //启动FileSplitterFetch线程 %>g3~yl //等待子线程返回
$7rq3y try{ f PM8f if(bFirst) *U
P@9D { -i%e!DgH nFileLength = getFileSize(); _N{RVeO if(nFileLength == -1) :{q<{^c { u[DfzH System.err.println("File Length is not known!"); N-e @j4WU } [<
&oF else if(nFileLength == -2) \uaJ@{Vug { yrC7F`. System.err.println("File is not access!"); IrqZi1 } ):b$xNn else TX&Jt% { x7eQ2h6O for(int i=0;i<nStartPos.length;i++) c'S,hCe* { Q|D @Yd\ nStartPos = (long)(i*(nFileLength/nStartPos.length)); IVAmV!.z } .O0+H+ for(int i=0;i<nEndPos.length-1;i++) pQtJc*[! { wfq7ob4^ nEndPos = nStartPos[i+1]; G}ob<`o|" } H\0~#(z?. nEndPos[nEndPos.length-1] = nFileLength; f7X6fr< } E: $P=%b } ,#L=v] 6er-{.L= [YUv7|\ //启动子线程 J
/f
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 0a-0Y&lQm for(int i=0;i<nStartPos.length;i++) y"H*%] { \uza=e fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), t3&LO~Ye siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), *fn*h[pV& nStartPos,nEndPos,i); Ljx(\Cm Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); d ysC4DS fileSplitterFetch.start(); 'U\<IL#U } [Z}9>~m // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $D|e>U siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); T<55a6NoK // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 4DL) rkO nEndPos = " + nFileLength); Cc%LztP> // fileSplitterFetch[nPos.length-1].start(); woD>!r>) j ~1B|,H *rIk:FehLB //等待子线程结束 ;3B1_vo9 //int count = 0; Cif>7]M //是否结束while循环 Ns7(j- boolean breakWhile = false; o'f?YZ$. {:]9Q Tq e= .njMqW5 while(!bStop) LRb{hUt= { /qy-qUh3h write_nPos(); @EnuJe Utility.sleep(500); n=c
2Kc breakWhile = true; P#XID 2; 5`gQ~ e0T34x' for(int i=0;i<nStartPos.length;i++) 1>E<8&2[L { ZRg;/sX] if(!fileSplitterFetch.bDownOver) RkBb$q9F] { V9dF1Hj breakWhile = false; R)RG[F# break; PEuIWXr } 7,lq}a8z } ^ml'? if(breakWhile) #7q7PYG4 break; 2gq9k}38 j+["JXy @++.FEf //count++; }A7j/uy}s //if(count>4) iTAx=SG // siteStop(); Htgx`N|
} 2VE9}%i /5:bvg+ 7[5.> h System.err.println("文件下载结束!"); }7
c[Q($K } \V*xWS catch(Exception e){e.printStackTrace ();} b+&%1C } |qmu_x\ A#95&kJpy i* NH'o/
//获得文件长度 X .5aMm public long getFileSize() fvF?{k> ~} { w6W}"Uw int nFileLength = -1; Gq }U|Z try{ =aoMii URL url = new URL(siteInfoBean.getSSiteURL()); viMzR(JU HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); HFaj-~b httpConnection.setRequestProperty("User-Agent","NetFox"); "huFA|` K3x.RQQ- 5&q8g;XiEM int responseCode=httpConnection.getResponseCode(); vDxe/x% if(responseCode>=400) B9H@e#[ { 8'4S8DM processErrorCode(responseCode); "t_-f7fS7 return -2; //-2 represent access is error R]btAu;Z } U2wbv Xr5- L"j
tf78 nY`RRC String sHeader; s8#X3Rp ktdW`R\+ @p NNq for(int i=1;;i++) X7i/fm{l' { kT!9`S\ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); pFHz"] //Utility.log(in.readLine()); 9uBM< sHeader=httpConnection.getHeaderFieldKey(i); ~(IB0=A{v if(sHeader!=null) t{WzKy { O2BDL1o if(sHeader.equals("Content-Length")) iIq)~e/ Z { vc+A RgvH+ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 8qEVOZjV& break; Ts ^"xlK } P}TI
q# } \u>"s else :E@3Vl#U break; cvfr)K[0 } %ve:hym* } :9_L6 catch(IOException e){e.printStackTrace ();} |Clut~G catch(Exception e){e.printStackTrace ();} 'Ub
g0"F( HsHB!mQV \&i P`v`K Utility.log(nFileLength); D0#x
Lh B&.FOO u(wGl_ return nFileLength; 846$x$G4 } y?a
Acn$ z3K6%rb- *i- _6s //保存下载信息(文件指针位置) r;Gi+Ca5 private void write_nPos() 7qg{v9|, { ]jaQ[g$F try{ P3nb2. output = new DataOutputStream(new FileOutputStream(tmpFile)); N.]qU d output.writeInt(nStartPos.length); 8qu2iPOcZ for(int i=0;i<nStartPos.length;i++) }=6'MjF] { IS#FiH // output.writeLong(nPos); zOqn<Y@ output.writeLong(fileSplitterFetch.nStartPos); !>e5z|1 output.writeLong(fileSplitterFetch.nEndPos); }c`fW& } _;~,Cgfi output.close(); I]Dl / } F;l$.9? .s catch(IOException e){e.printStackTrace ();} ,XIz?R>;c catch(Exception e){e.printStackTrace ();} xgNJ eQ } K,boVFs |&[L? 8&3V#sn' //读取保存的下载信息(文件指针位置) '&gF> private void read_nPos() #z2rzM@/: { 4)"n
RjGg try{
}f8Uc+ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); u#V5?i int nCount = input.readInt(); K!'AkTW+- nStartPos = new long[nCount]; C0
/g1;p( nEndPos = new long[nCount]; Z6_N$Z.A for(int i=0;i<nStartPos.length;i++) 3&[>u;Bp { DiEluA&w9 nStartPos = input.readLong(); M5*{ nEndPos = input.readLong(); I{lT> go } 7A\~)U@ input.close(); #L{OV)a< } 3'c0#h@VD catch(IOException e){e.printStackTrace ();} GA?87N catch(Exception e){e.printStackTrace ();} H*Kj3NgY } D!.+Y-+Xzu P~G 1EK|4 Fx
$Q;H!. private void processErrorCode(int nErrorCode) @:U+9[ { YE= q:Bv System.err.println("Error Code : " + nErrorCode); @W^| ? } P '>SmQ }p!HT6 tZ /u0'
6V //停止文件下载 FFH_d <q public void siteStop() NDs!a { mXUGe:e8 bStop = true; q@@T]V6 for(int i=0;i<nStartPos.length;i++) &/uu)v fileSplitterFetch.splitterStop(); &%s8L\? i2sN3it -Y*bSP)\ } \L(*]:EP } n< ud> JIb //负责部分文件的抓取 <HJl2p N **FileSplitterFetch.java @*qz(h]\ */ C":o/;,1 package NetFox; n[]tXrhU ) :\xHR4 (d<4"! import java.io.*; )@L'wW import java.net.*; Wt=| 98WZ){+,m ;Y;qg
public class FileSplitterFetch extends Thread { @~#Ym1{W ooV3gj4 5Pd"h S String sURL; //File URL .9"Y_/0 long nStartPos; //File Snippet Start Position Ty<L8+B| long nEndPos; //File Snippet End Position AN24Sf'` int nThreadID; //Thread's ID K)-m*#H&uw boolean bDownOver = false; //Downing is over @EDs~ lPv boolean bStop = false; //Stop identical Nof3F/2 N& FileAccessI fileAccessI = null; //File Access interface KGWyJ 9(L)&S{4K `8I&7c public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException g=]u^& {
k0 this.sURL = sURL; .>mr%#p this.nStartPos = nStart; sp
]zbX? this.nEndPos = nEnd; .{=$!8|&I9 nThreadID = id; [<{Kw=X__2 fileAccessI = new FileAccessI(sName,nStartPos);//定位 x)JOClLr } \N4
y< gF0q@M y~ i-'9AYyw public void run() GN0`rEh { gCN$} while(nStartPos < nEndPos && !bStop) Ai/b\:V9S { wo3wtx pFm=y#!t $ KRI'4 try{ y8 KX<2s1 URL url = new URL(sURL); r} P<iX HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); c1_5, 1U' httpConnection.setRequestProperty("User-Agent","NetFox"); ;]w<&C!= String sProperty = "bytes="+nStartPos+"-"; ]a!xUg!S httpConnection.setRequestProperty("RANGE",sProperty); 1|?05<8 Utility.log(sProperty); !
/NG.Wf J%jB?2
1:o ~j#]tElb InputStream input = httpConnection.getInputStream(); :T._ba3| //logResponseHead(httpConnection); v\,N 5 ,i0b)=!o {XWZ<OjG byte[] b = new byte[1024]; k~/>b~.c int nRead; RiTa \ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) }->.k/vc { A)~X, nStartPos += fileAccessI.write(b,0,nRead); #_|sgS?1 //if(nThreadID == 1) K3' niGT // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); p?2Y }9 } 2<][%> ' F! X}(N?t `iJhG^w9M Utility.log("Thread " + nThreadID + " is over!"); fsEzpUY:{W bDownOver = true; =;3fq- //nPos = fileAccessI.write (b,0,nRead); HoLv`JA } Sje wuIi1 catch(Exception e){e.printStackTrace ();} 3 AHY| } |hO~X~P } c(/VYMJZ& shH~4<15 Khe!g1=&X //打印回应的头信息 &tZG
@ public void logResponseHead(HttpURLConnection con) [Cb`{ { NziZTU} for(int i=1;;i++) .iQT5c { -\y-qHgb/ String header=con.getHeaderFieldKey(i); 'Vr$MaO if(header!=null) o d7]tOK9 //responseHeaders.put(header,httpConnection.getHeaderField(header)); xESjM1A) Utility.log(header+" : "+con.getHeaderField(header)); _6k*'aT~FK else $%%os6y2v break; +e-,ST&w( } e|rg;`AW } g!`3{
/4 AWjm~D-? oM)h#8bq public void splitterStop() bO;(bE m@ { yg2uC(2 bStop = true; "GQl~ } WnHUE Y];Ycj; qTB$`f'|$ } `s]4AKBO =rd|0K"(r 4#(ZNP /* 9~0^PzTA **FileAccess.java teW6;O_ *//文件访问(定位,写) )%X;^(zKM package NetFox; #$1og= import java.io.*; kip`Myw+ {i*2R^5 kJAn4I.l public class FileAccessI implements Serializable{ 7JDN{!jT ]O`
{dnP //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ;oNhEB:F RandomAccessFile oSavedFile; gUR]{dq^' long nPos; 3^StIw{X S\wW)Pv8 PU {uE[ public FileAccessI() throws IOException 1
Vy,&[c~" { &5%dhc4&!& this("",0); c DrebU } 2T)sXB u /_\#zC[ #n public FileAccessI(String sName,long nPos) throws IOException L!'k !k { A;J MV+2N oSavedFile = new RandomAccessFile(sName,"rw"); &W6^6=E{g this.nPos = nPos; k{AyD`'Q oSavedFile.seek(nPos); mF09U(ci } a{!r`>I\f O%f8I'u$ hKlZi!4J public synchronized int write(byte[] b,int nStart,int nLen) ` r']^
, { oA
tsUF+a int n = -1; b}G24{ try{ 3I|3wQ ( oSavedFile.write(b,nStart,nLen); }sxn72, n = nLen; )ZejQ}$ } ;U`X 6d catch(IOException e) >~\w+^2f8 { _}mK!_` e.printStackTrace (); jAND7&W } t=R6mjb 6S.~s6o, =3 +l return n; p\bFdxv# } tVqmn X8<2L2: #)`A7 $/, } 6<5Jq\-h &,i~ cG? oh#>
5cA8 /* 3,);0@I **SiteInfoBean.java 7W9~1
.SC */ IC{F.2D package NetFox; Gy@7Xf m=b~i^@ gor<g))\ public class SiteInfoBean { }'=h4yI z{BA4sn m_!U}! private String sSiteURL; //Site's URL NNa1EXZ[ private String sFilePath; //Saved File's Path 2N~ E' 25 private String sFileName; //Saved File's Name z}.D"
P+ private int nSplitter; //Count of Splited Downloading File cX
A t:m 1Qh`6Ya f Z0fJ9HW public SiteInfoBean() L|^o71t| {//nSplitter的缺省值为5 P` '$ //default value of nSplitter is 5 OK`Z@X_,bW this("","","",5); D22Lu;E } fw{,bJ(U .h;Se >&H~nGP. public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) t#<KxwhcN { hN(L@0) sSiteURL= sURL; Z,WW]Y,$ sFilePath = sPath; 3D)b*fPc sFileName = sName; .dI)R40L/\ this.nSplitter = nSpiltter; g-yi xU }.:d#]g8 }#= Od e } [.q(h/b r(}nhU Q%E K@@9:T$ public String getSSiteURL() >Wh3MG6 { y67uH4&Vm return sSiteURL; PaVO"y]C } b4 hIeBI\ 9.0WKcwg =J@`0H" public void setSSiteURL(String value) 4R +P { @+^c"=d1S sSiteURL = value; Lm.`+W5 } x.EgTvA&d h)E|?b_ eO{@@?/y public String getSFilePath() 67J*&5? | { W3LP
~ return sFilePath; D{AFL.r{ } 4YJ=q% G jNy?[
) /#yA%0=w public void setSFilePath(String value) Q[s2}Z!N; { +$(0w35V5 sFilePath = value; h39e)%x1 } =w<VT% ">6&+^BN' *?8RXer public String getSFileName() )&.!3y 660 { j
0
Y return sFileName; +AK:(r } /R%^rz'w fr#Qz{ yL"i
public void setSFileName(String value) #'>?:k { +8UdvMN sFileName = value; pN$;! } \$;~74} e~Hr(O+;e6 <F=Dj*] public int getNSplitter() ek[kq[U9 { +5*vABvCu return nSplitter; 9bEM#Hj } VD#!ztcY' bag&BHw pGGV\zD^ public void setNSplitter(int nCount) O3ZM:,. { Za!w#j%h nSplitter = nCount; CT}' ")Bm } l^,qO3ES } aRKv+{K Qcgu`]7} Wy(pLBmb /* 6_U|(f **Utility.java n{=7 yK */ 2 `5=0E1k package NetFox; G{A)H_o* gUGOHd(A S'?fJ. public class Utility { NQ!<f\m4n J" bD\% E{gv,cUM public Utility() ou;qO
5CT { 6z1\a DVzssPg `Z8^+AMc } 0IFlEe[># sJ7sjrEp1 //线程睡眠 BVAr&cu public static void sleep(int nSecond) RH=$h! 5 { O3+)qb!X try{ Bj&_IDs4 Thread.sleep(nSecond); ru(J5+H } (H[ catch(Exception e) Q)+Y} { \[k%)_ e.printStackTrace (); l% |cB93 } (+x]##Q } \=8=wQv #gI&lO*\gr //日志 <Cr8V'c public static void log(String sMsg) 3q CHh { wDZ System.err.println(sMsg); ~B*~'I9b* } *N'hA5.z RnSm]}?
'g]=.K+@} public static void log(int sMsg) Q,n4i@E { :K;T Q System.err.println(sMsg); zS?n>ElI } @% H8"A } 5&G
5eA TC@bL<1 0T1ko,C!,e /* *) }
:l **TestMethod.java '&)D>@g */ QnP{$rT package NetFox; I)rGOda{ yP%o0n/"x 55,=[ public class TestMethod { 2x6<8J8v*
Lxz mw Z'=H public TestMethod() 7y;u} 1 { ///xx/weblogic60b2_win.exe yIa[yJq try{ nIR*_<ow SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); +h|K[=l\ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); +
lP5XY{ SiteFileFetch fileFetch = new SiteFileFetch(bean); *0-v!\{ fileFetch.start(); [5!'ykZ } Kny%QBoiw catch(Exception e){e.printStackTrace ();} T|!D>l' Y!;gQeC 4XD)E& } .`mtA`N LjC6?a_?l Gj5>Y!9 public static void main(String[] args) >j)
w\i { ;{]8>`im&4 new TestMethod(); joY1(Y } %P(;8sS } Kc-Y 点击下载更多相关资料
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