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/* 6o!"$IH4 **SiteFileFetch.java f4q-wX_1 */ n):VuOjm package NetFox; eX\t]{\oC import java.io.*; g(1'i 1 import java.net.*; FE`J.aw^X Ae1},2py N}\i!YUD public class SiteFileFetch extends Thread { b~r ?#2K Ks4TBi&J ?S"xR0 * SiteInfoBean siteInfoBean = null; //文件信息Bean ws=y*7$y long[] nStartPos; //开始位置 k:fRk<C long[] nEndPos; //结束位置 SLW1]ZaG FileSplitterFetch[] fileSplitterFetch; //子线程对象 --FvE|I long nFileLength; //文件长度 g&
{YHq^+ boolean bFirst = true; //是否第一次取文件 :M Md@ boolean bStop = false; //停止标志 V5=Injs* File tmpFile; //文件下载的临时信息 2l9_$evK~ DataOutputStream output; //输出到文件的输出流 k,2%%m c8(.bmvF //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) grZN.zTO public SiteFileFetch(SiteInfoBean bean) throws IOException /SyiJCx0 { Mf?4 `LM siteInfoBean = bean; _b+3;Dy //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); uy$o%NL-7 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); dG1qrh9_- if(tmpFile.exists ()) fSj^/> { N7|ctO bFirst = false; B|!Re4`0 read_nPos(); , =#'?>Kq } }RXm=ArN else @rE>D { ,$*$w< nStartPos = new long[bean.getNSplitter()]; 'INdZ8j_ nEndPos = new long[bean.getNSplitter()]; G*ecM`Bl } VP[ J#TPU }O-|b#Q 5$/ED3mcK b|P[\9 } vdV@G`)HPr %N04k8z Y:XE4v/)@L public void run() h${+{1](6 { ,E<(K8 //获得文件长度 N[:;f^bH49 //分割文件 nDhr;/"i //实例FileSplitterFetch "8>T //启动FileSplitterFetch线程 +iY .Y V //等待子线程返回 !RN(/ &%y try{ 9ePG-=5I if(bFirst) Y j;KKgk { 9Ra*bP ]1 nFileLength = getFileSize(); OrNi<TY> if(nFileLength == -1) *]:gEO { ]3nka$wA* System.err.println("File Length is not known!"); G(" S6u } mII7p LbQ else if(nFileLength == -2) %ukFn
&-2@ { rl"$6{Z} System.err.println("File is not access!"); L|A}A[ P } 2iO AUo+ else a\;Vly; { >]s\%GO for(int i=0;i<nStartPos.length;i++) kK\G+{z? { 2:3-mWE nStartPos = (long)(i*(nFileLength/nStartPos.length)); Z]OXitt7 } 1j"_@?H[ for(int i=0;i<nEndPos.length-1;i++) I6@98w}" { Xfo3fW)s nEndPos = nStartPos[i+1]; lV924mh } u_ou,RF nEndPos[nEndPos.length-1] = nFileLength; }ya@*jH } #e)A } P&I%!'<
"x~VXU%xU ])Rs.Y{Q5 //启动子线程 #y;TSHx/ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; YD>5zV%!D for(int i=0;i<nStartPos.length;i++) jT/}5\ { :buH\LB*P fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $$'a siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), cC@.& nStartPos,nEndPos,i); {P/ sxh:e Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _7e ^
t N fileSplitterFetch.start(); &ed&2t`Y } kHMD5Q // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), CVxqNR*DN siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); uT1xvXfqP // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ,zXP,(x nEndPos = " + nFileLength); 3X|7 R // fileSplitterFetch[nPos.length-1].start(); (S<Z@y+d F/8="dM itotn!Wb` //等待子线程结束 {9mXJu$cc //int count = 0; "&9L //是否结束while循环 ={'*C7K)oK boolean breakWhile = false; (_2Iu%F R k'5L Q5K<ECoPk while(!bStop) ui>0?O*G { Xgb ~ED] write_nPos(); C6<*'5T Utility.sleep(500); XHN*'@
77; breakWhile = true; b\
P6,s'( mHj3ItXUu {:@MBA34 for(int i=0;i<nStartPos.length;i++) S{uKm1a { nO;*Peob if(!fileSplitterFetch.bDownOver) 85{2TXQ^%= { lhk=yVG3 breakWhile = false; KzgW+6*G break; :NCY6?
[Dz } Ng Jp2ut } J`I^F:y* if(breakWhile) l^~E+F~ break; 4hQ.RO r}>q*yx: '!V5 #J //count++; Q|$?d4La8 //if(count>4) 1J{1>r // siteStop(); 31cC* } NP+*L|-; NT1"?Thx| XT"- System.err.println("文件下载结束!"); bjq+x:> } =cP7"\ catch(Exception e){e.printStackTrace ();} HxE`"/~.7k } arQEi TXH9BlDn 5YG%\ //获得文件长度 G+k~k/D 6 public long getFileSize() s7
K](T4 { s{Wj&.)M int nFileLength = -1; RJ63"F $ try{ 9im<J' URL url = new URL(siteInfoBean.getSSiteURL()); H)@f_pfj( HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); n[f<]4< httpConnection.setRequestProperty("User-Agent","NetFox"); 12olVTuw kv8
/UW Nn:>c<[ int responseCode=httpConnection.getResponseCode(); 2D vKW%; if(responseCode>=400) *z3wm-z1& { VNggDKS~K processErrorCode(responseCode); .I1k+
return -2; //-2 represent access is error 7[/1uI9U8K } ]A.tauSW
:}n\
r/i YT@D*\ String sHeader; cy%S5Rz lDU@Q(V#}< U%qE=u- for(int i=1;;i++) `9>1 w d { ^DaP^<V //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 24; BY' //Utility.log(in.readLine()); @TqqF:c7 sHeader=httpConnection.getHeaderFieldKey(i); {wS)M if(sHeader!=null) MEled:i { w1q` if(sHeader.equals("Content-Length")) xA7Aw0 { #y2IHO- nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); s<hl>vY_' break; ^:Hx . } *$6dN x } &40# _>W7 else rd\:. break; aZBS!X } XqxmvN } NW
AT" catch(IOException e){e.printStackTrace ();} 5p]Cwj<u catch(Exception e){e.printStackTrace ();} M7x*LiKc2 lq[o2\ +jifbf- Utility.log(nFileLength); s/cclFji] (h$[g"8 83[gV@LW0m return nFileLength; O% }EpIP_ } 3Gyw^_{J #eZm)KFQg
,fR /C //保存下载信息(文件指针位置) O_bgrXg6x private void write_nPos() AJWV#J%nB { ]@G$L,3 try{ <Z:Fnp output = new DataOutputStream(new FileOutputStream(tmpFile)); )i$:iI
>k output.writeInt(nStartPos.length); mQiVTIP3[O for(int i=0;i<nStartPos.length;i++) =e j'5m($3 { S`?L\R.: // output.writeLong(nPos); F&[MyX U4 output.writeLong(fileSplitterFetch.nStartPos); A."]6R< output.writeLong(fileSplitterFetch.nEndPos); I4RUXi 5 } K H&o`U(} output.close(); -Rcl(Q}LZ } +`_Km5= catch(IOException e){e.printStackTrace ();} A
KjCm*K(q catch(Exception e){e.printStackTrace ();} T:?01?m } 8-clL\bm |(Q !$ +ia N[F$ //读取保存的下载信息(文件指针位置) TLWU7aj&! private void read_nPos() 1nAAs;`' { ;:l>Kac try{ FKpyD DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 2nsW)bd int nCount = input.readInt();
~d\>f nStartPos = new long[nCount]; 4Y!_tZ> nEndPos = new long[nCount]; ?x-:JME0 for(int i=0;i<nStartPos.length;i++) "(cMCBVYdA {
YgfQ{3^I nStartPos = input.readLong(); )(`HEl>-9c nEndPos = input.readLong(); KsR^:_e } ?loP18S
b input.close(); g]a5%8*{ } W{js9$oJ catch(IOException e){e.printStackTrace ();} 9 U!-Zn! catch(Exception e){e.printStackTrace ();} ?jy6%Y#,i } x}(p\Efx %hO/2u 1,pg7L8H private void processErrorCode(int nErrorCode) WAWy3i { WiBO8N,%` System.err.println("Error Code : " + nErrorCode); 9EI Oa/* } >ngP\&\ R[Y{pT,AY 5L% \rH&N //停止文件下载 ujH ^ ML public void siteStop() q\q8xF~[p { S{. G=O bStop = true; )xPfz for(int i=0;i<nStartPos.length;i++) #G`UR fileSplitterFetch.splitterStop(); gxf{/EjH c(5r [\ALT8vC?m } !GL
kAV } 8IrA{UU //负责部分文件的抓取 s+RSAyU **FileSplitterFetch.java Wd78 bu| */ KMo]J1o package NetFox; .*_uXQ [<H'JsJl 2zQ62t} import java.io.*; y^xEZD1X6- import java.net.*; {=)g?!zC ;{% R[M' CQGq}.Jt! public class FileSplitterFetch extends Thread { Jg:%|g @}[yC[' R3,O;9i String sURL; //File URL AIK99 long nStartPos; //File Snippet Start Position ay-M.J long nEndPos; //File Snippet End Position h:qt?$]J int nThreadID; //Thread's ID )CAEqP
boolean bDownOver = false; //Downing is over dd&n>A3O= boolean bStop = false; //Stop identical G+dQ" cI9 FileAccessI fileAccessI = null; //File Access interface 34e>R?J L2GUrf LLlt9(^d public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException -o`Eka!ELz { FWu[{X; this.sURL = sURL; :#I7);ol this.nStartPos = nStart; k.MAX8 this.nEndPos = nEnd; ,KO_h{mI< nThreadID = id; 9+!1jTGSkf fileAccessI = new FileAccessI(sName,nStartPos);//定位 F4T}HY>nZ } gqCDF H CRKuN R qnT* public void run() WhY8#B'? { ^P|
K2at while(nStartPos < nEndPos && !bStop) )08mG_&atL { D;RZE bm Hl\? oI/jGyY; try{ F9Y/Z5 Ea URL url = new URL(sURL); xdqiogu e HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 'c")]{ httpConnection.setRequestProperty("User-Agent","NetFox"); %?`TyVt&0 String sProperty = "bytes="+nStartPos+"-"; vI)-Zz[3 httpConnection.setRequestProperty("RANGE",sProperty); Vu
u2SS Utility.log(sProperty); &-s/F` 4PVkKP'/ l[)ZEEP InputStream input = httpConnection.getInputStream(); l'#P:eW //logResponseHead(httpConnection); -55Pvg0ND '&<T;V% /6$8djw byte[] b = new byte[1024]; 9*"Ae0ok1 int nRead; j!oD9&W4~ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^71!.b% { BRu/pyxG nStartPos += fileAccessI.write(b,0,nRead); 5V{ B,T //if(nThreadID == 1) Z6Owxqfht // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); >>'t7U## } Gl+Ql?| .%iJin"
YjV-70' Utility.log("Thread " + nThreadID + " is over!"); rTR4j>Ua~ bDownOver = true; =h#3D?b0n //nPos = fileAccessI.write (b,0,nRead); AhjUFz } ylEQeN catch(Exception e){e.printStackTrace ();} ;T6x$e } C9`J6Uu } oZY2K3J) 7xmyjy%c 1 >nl ]yO //打印回应的头信息 axRzn:f public void logResponseHead(HttpURLConnection con) L;n2,b { ?&H1C4
for(int i=1;;i++) <NLor55.] { 7d7"^M String header=con.getHeaderFieldKey(i); A=v^`a03I if(header!=null) 5K~kzRL$r //responseHeaders.put(header,httpConnection.getHeaderField(header)); jmcb-=ts Utility.log(header+" : "+con.getHeaderField(header)); ~"Pu6-\VT else
QTN
_Z#' break; ?Q~6\xA } /<HEcB } I1H} 5bf3 A1zqm_X5)P 1-Fz#v7p public void splitterStop() " iCR68e { &*I\~;1 bStop = true; 09f:%!^u } <eObQ[mQ yMQuM:d :y?xS } P(_wT:8C? 8-N8v
*0 blwdcdh /* $II[b-X?S **FileAccess.java =sqhPS<> *//文件访问(定位,写) H$^b.5K package NetFox; )C
@W_cfMN import java.io.*; |P_\l,f8` <&7KcvBn"4 +F &,,s"& public class FileAccessI implements Serializable{ q;T3bxp+ &&0,;r,-) //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 U&fOsx?" RandomAccessFile oSavedFile; Lp; {&=PIo long nPos; sOSol7n f`5e0;zm kIAWI;H{ public FileAccessI() throws IOException }+[H~8)5 { {emO=@CP this("",0); m6aq_u{W } uiO7sf6 U!:Q|':=h EDR;" G(N public FileAccessI(String sName,long nPos) throws IOException ."R,j|o6 { G<kslTPyq oSavedFile = new RandomAccessFile(sName,"rw"); /r#.BXP this.nPos = nPos; i|X ;n oSavedFile.seek(nPos); `~Eo;'( +^ } IqK??KSC Y{X79Rd J4qFU^ public synchronized int write(byte[] b,int nStart,int nLen) tT}*%A { T}(J`{9i int n = -1; ]X,C9 try{ 4h>Dpml oSavedFile.write(b,nStart,nLen); @O}%sjC1 n = nLen; >]q{vKCAP } fX).A` catch(IOException e) 4P@Ak7iL(V { G#ov2 e.printStackTrace (); }
h|1H } :E/]Bjq$; /dpEL9K +K4d(!Sb return n; 'c 0]8Y4
} kP9DCDO`[5 z'K&LH `}gjfu -'\ } 'qS&7
W( B&&:A4 '~RP+ /* YaJ[39V **SiteInfoBean.java q3\
YL? */ * 8n0 package NetFox; xJ>U_Gd {-IH?!&v bCY8CIF public class SiteInfoBean { ^>02,X
mk K'.aQ&2 GU'/-6-T private String sSiteURL; //Site's URL JQQP!]%} private String sFilePath; //Saved File's Path 0R&$P6 private String sFileName; //Saved File's Name o5dPE{f private int nSplitter; //Count of Splited Downloading File d^sS{m\ ZI4[v> )IQa]A public SiteInfoBean() Md_S};!QN6 {//nSplitter的缺省值为5 bhaIi>W~G //default value of nSplitter is 5 e[f}L xln this("","","",5); 4$LVl } @l:\0cO BwwOaO@L 6qQdTp{i public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) [F4]pR( { cl
kL)7RQ sSiteURL= sURL; 7 sv
3=/` sFilePath = sPath; sJ[I< sFileName = sName; +jQHf-l this.nSplitter = nSpiltter; }t }y {\3ZmF $'FPsoH } `R@1Sc<*| F}p)Q$0 `6a public String getSSiteURL() P%MYr"<$E { H&`0I$8m return sSiteURL; W8{g<.
/ } 7M;7jI/C KITC,@xE_O Q!7il<S public void setSSiteURL(String value) /
i[F { jd]Om
r! sSiteURL = value; 7]se!k, } s`Z|
A m,YBk<Bx 0;9X`z
J public String getSFilePath() @I_!q* { jpijnz{M return sFilePath; LsB|}_j7 } ]\DZW4?' e$'|EE.=q+ !R@v\Eu public void setSFilePath(String value) 4yy9m8/ { 6! `^}4 sFilePath = value; EjxzX1: } .d
mUh- aY:u-1 @`" UD public String getSFileName() haNi[| { O^/z7, return sFileName; h"O4r8G} } G,o5JL"t nh"8on]M~ 4WspPHj public void setSFileName(String value) z{;~$." { Z'hHXSXM sFileName = value; l-/fFy)T } lqaOLZH s>pM+PoGYd &Ul8h,qw public int getNSplitter() /i:c!l9 { faTp|T`nY return nSplitter; Lp1\vfU<+ } dMw7UJ *I)F5M `2
6t+Tb public void setNSplitter(int nCount) 4eD>DW { 85e!)I_ nSplitter = nCount; UO~Xzx!e } {wK|C<K } ,M?K3lG\g[ |[+/ ]Y X}fu $2 /* J?y0RX **Utility.java "A9qC*6[ */ *@+E82D package NetFox; >U7{EfUJdx Mp-hNO}.Z (JX 9c public class Utility { wk9qyv< ;N(9nX}%) _48@o^{ public Utility() r)]8zK4;= { %mF Z!( ;0"p)O@s04 Bx" eX>A8 } l$:?82{ Rlwewxmr //线程睡眠 gcI?)F public static void sleep(int nSecond) n=iL6Yu( { v\ <4y P try{ \c(Z?`p]R1 Thread.sleep(nSecond); p|0ZP6!| } wSPwa,)7s catch(Exception e) !kQJ6U { . UaLP e.printStackTrace (); a<CJ#B2K } T*1 `MIkv } L "[>tY ,t|qhJF //日志 jccSjGX@w public static void log(String sMsg) {8e4TD9E0 { P. Gmj; System.err.println(sMsg); q/eod } phP% c`s ]ciC w|[{xn^R public static void log(int sMsg) N_o|2 { =u<jxV9 System.err.println(sMsg); Vg^,Ky, } ZxoAf;U~ } c 4
bo 3R?6{. *wl&Zzx /* kJNu2S **TestMethod.java j<PpCL_8% */ YF$nL( package NetFox; DTN)#GCtF s<'WTgy1i E5Zxp3 N public class TestMethod { <d~IdK'\x VpyqVbx1 /;;$9O9 public TestMethod() LA4,o@V` { ///xx/weblogic60b2_win.exe PM8*/4Cu.5 try{ `%$l
b:e SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 3FsX3K,_X //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); lnWscb3t SiteFileFetch fileFetch = new SiteFileFetch(bean); Gq =i-I fileFetch.start(); =v6qr~ } 60X))MyN catch(Exception e){e.printStackTrace ();} ]EfM;'j[ W0\
n?$ZC~ }~!KjFbs } RCY}JH>} b0aV?A}th @WnW
@'*F public static void main(String[] args) Tu7}*vsR
{ H|s,;1# new TestMethod(); fYiof]v@_m } 7CSd}@71\ } KOit7+Q 点击下载更多相关资料
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