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/* "IsDL^)A9 **SiteFileFetch.java cM+s)4TPL */ ^sVB:? package NetFox; F;dUqXUu import java.io.*; )x&}{k6 % import java.net.*; e0u*\b $30lNZK1m8 uw&'=G6v public class SiteFileFetch extends Thread { GfT`>M?QGK 8:0.Pi(ln@ 9Lxa?Y1 SiteInfoBean siteInfoBean = null; //文件信息Bean 9k!#5_ M long[] nStartPos; //开始位置 (A8X|Y long[] nEndPos; //结束位置 `_&7-;)i*\ FileSplitterFetch[] fileSplitterFetch; //子线程对象 O!\\m0\e long nFileLength; //文件长度 {-Y% wM8<i boolean bFirst = true; //是否第一次取文件 xyTjK.N boolean bStop = false; //停止标志 ,n?oNU File tmpFile; //文件下载的临时信息 `BHPjp> DataOutputStream output; //输出到文件的输出流 W 7Y5~%@
^'c[HVJ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) E MKv)5MH public SiteFileFetch(SiteInfoBean bean) throws IOException du4Q^-repC { [L@ vC>G siteInfoBean = bean; H23-%+*J //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); -^LEGKN tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); H<YS2Ed if(tmpFile.exists ()) O>`DR0 { 8CKI9 bFirst = false; lGr(GHn read_nPos(); Doy7prKI8 } Obu>xK( else 0dgp< { g"sW_y_O nStartPos = new long[bean.getNSplitter()]; 3 aG?^z nEndPos = new long[bean.getNSplitter()]; g&V1<n\b+ } <}$o=>' 8wqHr@}p sP5\R# QGnBNsA h } q.>{d%? pTlNJ!U> 9n"D/NZB public void run() thjCfP { *L.+w-g&& //获得文件长度 <M|kOi //分割文件 ca1A9fvo //实例FileSplitterFetch AA$-Lx(UJk //启动FileSplitterFetch线程 dRXF5Ox5K} //等待子线程返回 u%vq<|~- try{ LCRZ<?O[| if(bFirst) {?' DZR s { 2!b+}+: nFileLength = getFileSize(); -HU5E>xG if(nFileLength == -1) P p[?E.]P { v(/T<^{cuk System.err.println("File Length is not known!"); Zi fAn } TPrqb else if(nFileLength == -2) @<O
Bt d { u<l[S System.err.println("File is not access!"); Wo@0yF@ } o'Byuct else UmSy p\i {
K$dSg1t
for(int i=0;i<nStartPos.length;i++) |A#pG^ { @e_ bG@ nStartPos = (long)(i*(nFileLength/nStartPos.length)); 2n]Br } _Jc[`2Uv_c for(int i=0;i<nEndPos.length-1;i++) Re{vO&. { +KV`+zic+ nEndPos = nStartPos[i+1]; %(,Kj
~0 } XP"lqyAi nEndPos[nEndPos.length-1] = nFileLength; =r=YV-D. } <T[wZ[l } [kIiKLX ZzNp#FrX" x4PA~R //启动子线程 B`xrdtW fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Fcc\hV; for(int i=0;i<nStartPos.length;i++) A&OU;j] { fWKI~/eUY| fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;x*_h siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ~5[#c27E9 nStartPos,nEndPos,i); 9H9 P'lx9 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); LwV4p6A fileSplitterFetch.start(); tO$/|B74Bz } h|tdK;) // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), F(J6 XnQ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); }]ak6'|[ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", O9#8%p%
) nEndPos = " + nFileLength); _s/5oRHA // fileSplitterFetch[nPos.length-1].start(); v&p|9C@ HrH-e=j 82.::J'e //等待子线程结束 Lj"@JF;c //int count = 0; t%$> //是否结束while循环 X\:;A { boolean breakWhile = false; r5kKNyJ x w8
e owDp?Sy}E while(!bStop) bhqBFiuhH { |kPjjVGF{ write_nPos(); ALVHKL2 Utility.sleep(500); b!C\J breakWhile = true; K!c "g,S SW!lSIk y3^<rff3Gc for(int i=0;i<nStartPos.length;i++) a\60QlAk~ { /a}F;^ if(!fileSplitterFetch.bDownOver) [ZC{eg+D { [&e|:1 breakWhile = false; A}Q6DHh26 break; c]SXcA;Pmv } F7!g+LPc< } AI{Tw>hZ if(breakWhile) d<{>& break; wldv^n hM EDQKb TaPt HjCWsQM //count++; u^HC1r|% //if(count>4) LhN?j5XqM // siteStop(); BG>fLp } wKxw|Fpn ~m:oJ+:O [Dr' System.err.println("文件下载结束!"); 7Gwn ,&) } 05o)Q &` catch(Exception e){e.printStackTrace ();} ,%)O/{p_ } ENZjRf4 Q=YIAGK H(L.k;B //获得文件长度 kYbqb? public long getFileSize() " pg5w { 5&59IA%S int nFileLength = -1; E}?n^Zf try{ R;mA2:W)x URL url = new URL(siteInfoBean.getSSiteURL()); W|X=R?*ZK HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); J,iS<lV_ httpConnection.setRequestProperty("User-Agent","NetFox"); 6,wi81F,} ?3[Gh9g` p**Sd[| int responseCode=httpConnection.getResponseCode(); {KQ-QKxxS if(responseCode>=400) >:o$h2 { {}.M(nPtv; processErrorCode(responseCode); 7+!FZo{? return -2; //-2 represent access is error dC'8orFG+ } P 2-^j) Dq07Z^#' F,dPmR String sHeader; h^QLvOuR 6zyxGJ( ]A?(OA for(int i=1;;i++) ]|m?pt { +56N}MAs //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); -!@]z2uU //Utility.log(in.readLine()); p!oO}gE sHeader=httpConnection.getHeaderFieldKey(i); 0P_=Oy"l- if(sHeader!=null) /penB[1i { 7)RDu,fx if(sHeader.equals("Content-Length")) \wZ
4enm { ~,^pya nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); #%9t- break; Rb/|ae } ^X]rFY1 } u0Q6+U else b=L4A,w~a break; Z= +Tw!wR> } @23?II$=@ } "?*B2*|}` catch(IOException e){e.printStackTrace ();} ,=a+;D]' catch(Exception e){e.printStackTrace ();} ]F{F+r #]rfKHW9 G;ihm$Cad Utility.log(nFileLength); $~3?nib"j
O*SJx. FOyANN' return nFileLength; R$Rub/b6 } ;NoiH& 7|@FN7]5NF K' ?`'7 //保存下载信息(文件指针位置) _^Z
v[P private void write_nPos() W{$J)iQ { iFOa9!_0n try{ awU!3)B output = new DataOutputStream(new FileOutputStream(tmpFile)); (^HU| output.writeInt(nStartPos.length); ~XeWN^l(Ov for(int i=0;i<nStartPos.length;i++) <)$e*HrI { XQ'$J_hC // output.writeLong(nPos); ,Gi%D3lA output.writeLong(fileSplitterFetch.nStartPos); \? n<UsI output.writeLong(fileSplitterFetch.nEndPos); u5.zckV } Leu6kPk output.close(); Hg~8Td** } Dz3~cuVb catch(IOException e){e.printStackTrace ();} ~hxW3e catch(Exception e){e.printStackTrace ();} G_QV'zQ } $jg~a 5_\1f|, 3,"G!0 y. //读取保存的下载信息(文件指针位置) F! [Gj%~I
private void read_nPos() h1~/zM/` { LVaJyI@/> try{ {zI>"%$u DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); tXCgRU int nCount = input.readInt(); 2Rqpok4 nStartPos = new long[nCount]; yJ:rry nEndPos = new long[nCount]; !lL~#l:F for(int i=0;i<nStartPos.length;i++) }U^iVq* { 6{w'q&LYcE nStartPos = input.readLong(); I.gF38Mx nEndPos = input.readLong(); i'B$Xr } sB*!Nf^y input.close(); C';Dc4j } ~bqw !rz catch(IOException e){e.printStackTrace ();} ,`8:@<e catch(Exception e){e.printStackTrace ();} *EPJeblAV } G|I}x/X"Q7 <M,<|Y*) %KPQ|^WE private void processErrorCode(int nErrorCode) x9o(q`N { @dn&M9Z System.err.println("Error Code : " + nErrorCode); $Ji;zR4, } u}?|d8$h\ B2:GGZ|jS OD~yIV //停止文件下载 ` Nv1sA#C public void siteStop() !TN)6e7`
{ +Mb}70^ bStop = true; mYqLqezAA for(int i=0;i<nStartPos.length;i++) 5S ) N&% fileSplitterFetch.splitterStop(); T3Sz<K$E ~ %Ij5PD QJ%N80 } ba)hWtenH } n0)y|B# //负责部分文件的抓取 s)+] pxV0- **FileSplitterFetch.java (_Th4'(@Y */ RJ-J/NhWyI package NetFox; sT,*<^ ^[6#Kw&E (/S6b import java.io.*; 5^{ I}Q import java.net.*; h(i_'P? #@F x=N0H public class FileSplitterFetch extends Thread { KvjH\;78 Q6p75$SVq 9R:?vk4 String sURL; //File URL As??_=>4 long nStartPos; //File Snippet Start Position p::`1 long nEndPos; //File Snippet End Position [;#^h/5E int nThreadID; //Thread's ID bV:MOj^ boolean bDownOver = false; //Downing is over L?(m5u~b boolean bStop = false; //Stop identical v?o("I[ C FileAccessI fileAccessI = null; //File Access interface N.vkM`Z !N/?b^y aW#^@||B public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException
UoJMOw[ { o}Zl/&( this.sURL = sURL; \,G19o}`Es this.nStartPos = nStart; &D` $YUl@ this.nEndPos = nEnd; s5ILl wr nThreadID = id; 1#x@ fileAccessI = new FileAccessI(sName,nStartPos);//定位 lgC^32y } n*hRlL MNX-D0`g _:Ov-HIR public void run() 0Hr)h{!F" { 9abn6S(XpJ while(nStartPos < nEndPos && !bStop) LufZ, { OQ _wsAA 3ZqtIQY` <7oZV^nd * try{ 8u Z4[ URL url = new URL(sURL); C7!=LiK} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;_1> nXh httpConnection.setRequestProperty("User-Agent","NetFox"); o2^?D`Jr String sProperty = "bytes="+nStartPos+"-"; tp b(.`G httpConnection.setRequestProperty("RANGE",sProperty); c#pVN](? Utility.log(sProperty); gWy2E;"a aIE\B4w eD N%p InputStream input = httpConnection.getInputStream(); GEAVc9V //logResponseHead(httpConnection); NTSKmCvQG HgRfMiC ]2xoeNF/W{ byte[] b = new byte[1024]; {N0ky=ud int nRead; cWa>rUsF while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) DO?
bJ01 { =e]Wt/AQ nStartPos += fileAccessI.write(b,0,nRead); ]K%D$x{+\ //if(nThreadID == 1) Ay\!ohIS3 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); nHB`<B } 4\Cb4jq%/ RH<C:!F^ [oS.B\Vc Utility.log("Thread " + nThreadID + " is over!"); dUpOg{I.x bDownOver = true; Alb5#tm:m //nPos = fileAccessI.write (b,0,nRead); #e;\Eap } Uf-`g> catch(Exception e){e.printStackTrace ();} (9D,Ukw } cWL7gv\| } jz$83TB- W$Zc;KRz$0 "zN]gz=OV> //打印回应的头信息 [es-&X07< public void logResponseHead(HttpURLConnection con) s)|l-I { agW#"9]WM for(int i=1;;i++) ;hp?wb { rDWqJ<8 String header=con.getHeaderFieldKey(i); `'<&<P if(header!=null) [+v}V ,jb //responseHeaders.put(header,httpConnection.getHeaderField(header)); a0x/ ?)DO Utility.log(header+" : "+con.getHeaderField(header)); ~0@+8%^>; else %O3 r>o= break; @Y2&v956 } IK^jzx } O}_Z"y ZN?UkFnE tvG/oe .1' public void splitterStop() e#$ZOK)` { ocT.2/~d bStop = true; (eAh8^) } D2}nJFR
] ,*@6NK,. ,, G6L{&Z } +Ss|4O}' `Z0#IeX= fX2PteA0qX /* i;$'haK< **FileAccess.java X pd^^ *//文件访问(定位,写) ii@O&g package NetFox; DOm5 azO!> import java.io.*; TBYRY)~f ]OOL4=b [UHDN:y public class FileAccessI implements Serializable{ xFY;aK v+|N7 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 nUvxO `2 RandomAccessFile oSavedFile; b%<i&YY# long nPos; (U |[C* UC34AKm Py8<db% public FileAccessI() throws IOException |0mVK` { X|7Y|0o this("",0); 5E/z.5 q } ivbuS-f=r Whq@>pX8 ymBevL public FileAccessI(String sName,long nPos) throws IOException ` `A=p<W { rsR0V+(W oSavedFile = new RandomAccessFile(sName,"rw"); ?Q]{d'g(sx this.nPos = nPos; [S/]Vk|4 oSavedFile.seek(nPos); ]64mSB } 1v4( e/m,PE DT@6Q. public synchronized int write(byte[] b,int nStart,int nLen) \@4_l?M { 5"5D( int n = -1; ( {H5k'' try{ \gL
H_$} oSavedFile.write(b,nStart,nLen); zZ|Si n = nLen; qlSc[nEk } @l^=&53T catch(IOException e) RTNUHz;{L { MX?K3=j @> e.printStackTrace (); xaWm wsym } {@9y%lmrh $@t-Oor; lu(<(t,Lbs return n; +xwz.::: } OCF\*Sx 9
I> 3p4] PqIGc } Gv}*Tw$ R R><so% Te~"\`omJ3 /* dx@#6Fhy **SiteInfoBean.java !Ljs9 =UF */ su(y*187A package NetFox; I -i)D EW1L!3K -3X#$k8 public class SiteInfoBean { 7Rj!vj/ @<\f[Znto ~ @Ib:M private String sSiteURL; //Site's URL jcN84AaRFI private String sFilePath; //Saved File's Path f
5_n2 private String sFileName; //Saved File's Name J
/'woc private int nSplitter; //Count of Splited Downloading File <FMW%4 %$I\\qq>{ y%=\E public SiteInfoBean() Fm{Ri=X<: {//nSplitter的缺省值为5 ~o%|#-S //default value of nSplitter is 5 6!/e_a this("","","",5); h/`OG>./ } Oe^3YOR#j{ Vy{=Y(cpF2 `ItMn&P public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) J& +s { kYz)h sSiteURL= sURL; X\hD4r"
sFilePath = sPath; '+Dn~8Y+9 sFileName = sName; FJv=5L this.nSplitter = nSpiltter; &7T0nB/) 0kpRvdEr- 42:\1B#[ } ?
8S0 B>t$Z5Q^X O:RPH{D public String getSSiteURL() G[r_|-^S { OAR1u} return sSiteURL; _+%-WFS| } xg'z_W D<#+ R" `.Y["f
1B public void setSSiteURL(String value) Mvrc[s+o { F^IYx~: sSiteURL = value; C!B2.:ja } -Uq I=# +e%9P%[+ u1ggLH!U public String getSFilePath() e1S |&W8 { vX)JJ|g return sFilePath; 4/S4bk*8 } 7h<Q{X<A
6~0S%Hz Y1H8+a5@ public void setSFilePath(String value) 5l2Ph4( { D.j'n-yw sFilePath = value; - P1OD)B } 8Cs)_bj#! q0.+ F4 ^P~%^?( public String getSFileName() U'UV=:/- { }/[tB return sFileName; ={W;8BUV%^ } "dXRUg" 4!d&Zc>C4 Q{UR3U'Q public void setSFileName(String value) Zb8Ty~.\P { F5wCl2I sFileName = value; _$NFeqLww } =ILs[p V?
w;YTg 8uM >Up X public int getNSplitter() :f ybH)* { ,<zGvksk return nSplitter; )~T)$TS } _jR%o1Y} dfiA- h A$WE:<^ public void setNSplitter(int nCount) J i :2P* {
VD;Ot<% nSplitter = nCount; V2,54YE } U voX\ } GX&BUP\ =_\5h=`Yx x:88E78 /* ixw3Z D(>+ **Utility.java &xgMqv2/ */ s-}|_g.Pt package NetFox; s&iM.[k ~jH@3\
?- D*o_IrG_( public class Utility { Q`4= ,icgne1j '+?AaR&p? public Utility() ?!U=S=8 { }BKEz[G( 2S&e!d- m beM/ } 4{(uw X,IjM&o"Y //线程睡眠 sHyhR: public static void sleep(int nSecond) ^rfY9qMJr8 { [!]a'
T#x try{ L$cNxz0$ Thread.sleep(nSecond); #M$[C d
I$ } Jor>YB`X catch(Exception e) -ZlBg~E { zIi|z}WJ e.printStackTrace (); TUIj-HSe } *&q\)\(3w } WM.JoQ jA$g0> //日志 s:7^R-"
public static void log(String sMsg) QzPq^ { U[*VNJSp System.err.println(sMsg); F^7qLvh } K~H)XJFF K:Wxx" i6?,2\K public static void log(int sMsg) %%`Nq&' { jGl8y!aM System.err.println(sMsg); swYlp } kQ7$,K# } WjW+EF8( 0^az<!!O# E0'+]"B /* = I,O+^ **TestMethod.java VLC<ju! */ B]L5K~d package NetFox; U&yXs'3a& .+MJ' bW <+o-{{E[ public class TestMethod { jl;_lcO
rL3<r F B9PIsFS public TestMethod() /vll*}} { ///xx/weblogic60b2_win.exe 1
0lvhzU try{ L6./b; SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 'MRvH
lCM //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); I|9(*tq) SiteFileFetch fileFetch = new SiteFileFetch(bean); HS XS%v/Y fileFetch.start(); f]`#BE)V } n0F.Um catch(Exception e){e.printStackTrace ();} FRd!UqMXY (+68s9XS7 <cNXe4( } WSi`)@.XO J(JsfU4 G3'>KMa. public static void main(String[] args) ?YWfoH4mS { ,(dg]7 new TestMethod(); bO 2>ced } ) DXN|<A } g@wF2= 点击下载更多相关资料
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