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/* n
Kkpp- **SiteFileFetch.java Wt.DL mO */ $|$@?H>K package NetFox; J8'"vc} = import java.io.*; .f~9IAXP` import java.net.*; 4.9qB d4y#n=HnnV Mh%{cLM public class SiteFileFetch extends Thread { mWviWHK *i"9D: xm m,-u SiteInfoBean siteInfoBean = null; //文件信息Bean Tmg C {_ long[] nStartPos; //开始位置 r)<A YX]J long[] nEndPos; //结束位置 OUv )`K FileSplitterFetch[] fileSplitterFetch; //子线程对象 2Kxb(q" long nFileLength; //文件长度 v93b8/1 boolean bFirst = true; //是否第一次取文件 {&1L &f< boolean bStop = false; //停止标志 Ib(C`4% File tmpFile; //文件下载的临时信息 is;g`m DataOutputStream output; //输出到文件的输出流 ?:R ]p2 ID ne#dEUD //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) '|C%X7 public SiteFileFetch(SiteInfoBean bean) throws IOException J(1Tl { (-C)A-Uo& siteInfoBean = bean; jcCAXk055 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); b4L7M1l tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 196aYLE if(tmpFile.exists ()) "P !
.5B { ,%pCcM) bFirst = false; 7D'\z
IW read_nPos(); BMp'.9Qgm } *@rA7zPFf else 1AJ6NBC&c { !vz'zy)7 nStartPos = new long[bean.getNSplitter()]; hFV,FBsAO nEndPos = new long[bean.getNSplitter()]; 6,t6~Uo/ } & SXw=;B rm-d),Zt M=,pn+}y> XYU5. } V.B@@ ; E%w^q9C rWht},-|1 public void run() <H-Nft>O { QE]'Dc% //获得文件长度 4[lFurH //分割文件 l7QxngWw //实例FileSplitterFetch ~,lt^@a //启动FileSplitterFetch线程 ')jItje| //等待子线程返回 y
4i3m(S try{ R ]Ev=V'U if(bFirst) :1 +Aj
( { @.;+WQE nFileLength = getFileSize(); {!Qu(% if(nFileLength == -1) ^4sfVpD2! { mSYjc)z System.err.println("File Length is not known!"); oU=vl!\J } Y"FV#<9@7E else if(nFileLength == -2) /pMOinuO { $N?8[ System.err.println("File is not access!"); /k'7j*t Z } ;yNc7Vl else $PJ==N { cSt)Na~C for(int i=0;i<nStartPos.length;i++) / { <+QdBp'd; nStartPos = (long)(i*(nFileLength/nStartPos.length)); GDLw_usV } xvl$,\iqE for(int i=0;i<nEndPos.length-1;i++) P<pv@l9) { ~b_DFj nEndPos = nStartPos[i+1]; UytMnJ88 } Lu#q o^ nEndPos[nEndPos.length-1] = nFileLength; ,z&S;f.f } |))NjM'ZBl } Lc!2'Do; }nrjA0WN |=;hQ2HyF //启动子线程 PVb[E 03 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; G+dq
*/ for(int i=0;i<nStartPos.length;i++) sq$v6x sl { OnTe_JML fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 5dj" UxH siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ]\*^G@HA2 nStartPos,nEndPos,i); _xKn2 ?d8g Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
7)2K6<q fileSplitterFetch.start(); F`g(vD> } tSHW"R // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =MNp; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); UhH#>2r_ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", HA'~1$#z nEndPos = " + nFileLength); ;UQza ]i // fileSplitterFetch[nPos.length-1].start(); `Gio
2gl9 D4VDWv y_m+&Oe //等待子线程结束 HzTmNm) //int count = 0; ,AnD%#o //是否结束while循环 w/|&N>ZOx boolean breakWhile = false; K6DN>0sY =|oi0 %]+R>+ while(!bStop) BqNsW
(+ { 6ll!7U(9( write_nPos(); !!C/($ Utility.sleep(500); 8}|et~7! breakWhile = true; U3_${ -8l<5g7 &M13F>! for(int i=0;i<nStartPos.length;i++) V\`Z|'WIQD { W,4!"*+ if(!fileSplitterFetch.bDownOver) >9H^r\ { ^_]ZZin breakWhile = false; <Kt_
oxK, break; {SV/AN } Z"8lW+r* }
RHUZ:r if(breakWhile) >~o-6g break; &jJu=6 U
B [xqV`(vM C:B 7%< //count++; KlT:&1SB9 //if(count>4) Sf?;j{?G // siteStop(); Vuz.b.,i` } =F+v+zP7P ~nA k-toJ O},}-%G System.err.println("文件下载结束!"); ed6@o4D/kf } i(4<MB1a catch(Exception e){e.printStackTrace ();} @j\:K<sk } :+\0.\K0! .OdtM
Xy Z|t=t"6" //获得文件长度 s+:|b~ public long getFileSize() n\+c3 { afrF%! int nFileLength = -1; $7q3[skH try{ CXq[VYM&X URL url = new URL(siteInfoBean.getSSiteURL()); 3-/|G-4k7 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Go%Z^pF3CO httpConnection.setRequestProperty("User-Agent","NetFox"); _/1/{ G'JHimP2j {w2]
Is2F int responseCode=httpConnection.getResponseCode(); HPphTu}` if(responseCode>=400) |^Iox0A { O=jLZ2os processErrorCode(responseCode); Jxvh; return -2; //-2 represent access is error PK+sGV } ${T/b(NM Ja6 KO2}p H~FI@Cf$L String sHeader; 3X gJZ
Ksx-Y" S>oEk3zlw for(int i=1;;i++) xSudDhRP { Xl4}S"a //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); LhL |ETrJ //Utility.log(in.readLine()); owIpn=8|Q sHeader=httpConnection.getHeaderFieldKey(i); _V"0g=&Hc if(sHeader!=null) <&\ng^Z$ { 0q5J)l: if(sHeader.equals("Content-Length")) :qE.(k1@5 { 1ui)Hv=h* nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); UBwl2Di break; f./K/ } ':n`0+Eh } e0(/(E: else ov+{<0Q
break; Wep^He\: } j:%,lcF } $M}"u[Qq catch(IOException e){e.printStackTrace ();} }2]|*?1, catch(Exception e){e.printStackTrace ();} =F@
+~)_ *H/>96 xeF>"6\ Utility.log(nFileLength); Zv@qdY<: TnQ>v{Rx P&Keslk return nFileLength; Ll|-CY $ } :'T+`( 2^B_iyF; Bc8&-eZ, //保存下载信息(文件指针位置) J.UNw8z private void write_nPos() c4AJ`f.5 { naR< try{ d`/8Q9tQ output = new DataOutputStream(new FileOutputStream(tmpFile)); IP`lx output.writeInt(nStartPos.length); OH/9<T? for(int i=0;i<nStartPos.length;i++) hNXZL>6 { *J4!+GD // output.writeLong(nPos); KtaoOe output.writeLong(fileSplitterFetch.nStartPos); {dF@Vg_n output.writeLong(fileSplitterFetch.nEndPos); L -Q8iFW' } #zP-,2!r output.close(); @V
' HX } $+80V{J# catch(IOException e){e.printStackTrace ();} DzR,ou catch(Exception e){e.printStackTrace ();} !
yJ0Am> } 0BXr[%{` eay|>xa2 Sn[xI9}O //读取保存的下载信息(文件指针位置) DQ8/]Z{H private void read_nPos() neU=1socJ { p<r^{y try{ ;y(;7n_ a DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); $2W#'_K+ int nCount = input.readInt(); syr0|K[ nStartPos = new long[nCount]; k'8q/] nEndPos = new long[nCount]; SA'g` for(int i=0;i<nStartPos.length;i++) ug,AvHEnB { f(y+1 nStartPos = input.readLong(); [0Xuo nEndPos = input.readLong(); gs1yWnSv5 } >T;!Z 5L1 input.close(); $TK*w8@: } z6w'XA1_+t catch(IOException e){e.printStackTrace ();} bhD-;Y!6; catch(Exception e){e.printStackTrace ();} !Q"L)%)'A } -Y524
}aOqoi7w 8Ay7I private void processErrorCode(int nErrorCode) 8(Az/@=n { ~g!!#ad System.err.println("Error Code : " + nErrorCode); :WRD<D_4 } uzxwJs'fz 1{M?_~g4 y CHOg //停止文件下载 waMV6w)< public void siteStop() i1x4$} { pT=^o bStop = true; [.>=>KJ_ for(int i=0;i<nStartPos.length;i++) !BVCuuM>w fileSplitterFetch.splitterStop(); 'TYO-'aC -n7@r lq.:/_m0 } fDDpR= } d3z nb@7 //负责部分文件的抓取 ovN3.0tAI **FileSplitterFetch.java HsYzIQLL */ Y[e.1\d' package NetFox; 1)c{;x&W #r9\.NA! "iEnsP@'Wg import java.io.*; Aq(cgTNW import java.net.*; I'IFBVhaYn 07SW$INb ga|<S@u?} public class FileSplitterFetch extends Thread { %( OP
[ /\Nc6Z/ L FV9{u[3m String sURL; //File URL P]m{\K long nStartPos; //File Snippet Start Position D 6'd&U{_ long nEndPos; //File Snippet End Position @N '_qu int nThreadID; //Thread's ID Z4G%Ve[ boolean bDownOver = false; //Downing is over 1^^{;R7N boolean bStop = false; //Stop identical ZNH-0mk FileAccessI fileAccessI = null; //File Access interface h<LS`$PK;E ~Q=;L>Qd 97 SS0J public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException oC"
[rn { {$EX :ID this.sURL = sURL; a)W|gx6Y this.nStartPos = nStart; Y
22Ai this.nEndPos = nEnd; pF6u3] nThreadID = id; *
4J!@w fileAccessI = new FileAccessI(sName,nStartPos);//定位 "tl{HM5u } PI L)(%X vFHeGq70j TAh'u|{u2 public void run() H,c1&hb/w { )-X8RRw' while(nStartPos < nEndPos && !bStop) _886>^b@ { 1VYH:uGuAU [<i3l'V/[ 5 `TMqrk try{ M>=@Z*u/+ URL url = new URL(sURL); ZzK^bNx)0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); RUr ~u httpConnection.setRequestProperty("User-Agent","NetFox"); zU[o_[+7^ String sProperty = "bytes="+nStartPos+"-"; dlyGgaV*X httpConnection.setRequestProperty("RANGE",sProperty); kT
Utility.log(sProperty); *b~8`Opa` Uy=yA >7@,,~3 InputStream input = httpConnection.getInputStream(); #SHJ0+)o //logResponseHead(httpConnection); /*gs] {QG6ldI CV
HKP[- byte[] b = new byte[1024]; %wl:>9] int nRead; v9J1Hha# while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) w!*ZS~v/r { gHh(QRA nStartPos += fileAccessI.write(b,0,nRead); "E7<S5cr //if(nThreadID == 1) >lmqPuf // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); aVHID{Gf Z } +uF}mZS^ \a0{9Xx F ir}*E=* Utility.log("Thread " + nThreadID + " is over!"); u0)O Fz bDownOver = true; Vxrj(knck, //nPos = fileAccessI.write (b,0,nRead); tHaHBx1P } 6|Dtx5
"r catch(Exception e){e.printStackTrace ();} [ {"x{; } R%LFFMVn } &b~X&{3, cb'Ya_ s8:epcL`A //打印回应的头信息 Msvs98LvW public void logResponseHead(HttpURLConnection con) vC&0UNe$ { 1LFad>` for(int i=1;;i++) GYy8kp84 { 3,Z;J5VL4! String header=con.getHeaderFieldKey(i); )y:M8((% if(header!=null) x_8sV?F //responseHeaders.put(header,httpConnection.getHeaderField(header)); \aof Utility.log(header+" : "+con.getHeaderField(header)); 6qQ_I0f else \+Qd=,!i( break; V!*1F1 } [<
9%IGH } fb0)("_V %qJgtu"8 Q u/f>tJN; public void splitterStop() _&G_SNa { +5-|6 bStop = true; 6f0o' } >8{{H"$;( bCTN^ 3P75:v } O|Vc D\ZH1C!d Tw%1m /* Z;u3G4XlF **FileAccess.java w?3ww7yf` *//文件访问(定位,写) _"H\,7E package NetFox; &RuTq6)r import java.io.*; $uwz`N: b'FTyi cJ?,\@uuP public class FileAccessI implements Serializable{ F W2x (!m6>m2 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 < j RandomAccessFile oSavedFile; 4uE)*1 long nPos; :Eh}]_ GXLh(d!C uZf
6W<a public FileAccessI() throws IOException ~tL:r=
{ B<myt79F_[ this("",0); JSq3)o9?/ } LO%e1y FwKY;^`!d 9A{D<h}yk public FileAccessI(String sName,long nPos) throws IOException n}9<7e~/ { 9I5AYa? oSavedFile = new RandomAccessFile(sName,"rw"); | Wj=%Ol%o this.nPos = nPos; '8R5Tl oSavedFile.seek(nPos); $AZ=;iP- } g;q.vHvsc" @b2?BSdUp 1Xh@x public synchronized int write(byte[] b,int nStart,int nLen) fwx^?/5j { t0xE int n = -1; W}7Uh
b try{ 6o]{< T/' oSavedFile.write(b,nStart,nLen); ',|OoxhbK n = nLen; Ma{@b$> } ETH
($$M catch(IOException e) y_Gs_xg { 2S:B%cj9m e.printStackTrace (); m'G=WO*% } ]4')H;'y RV]QVA*i U![$7k>,pr return n; Dbx zqd } n0K+/}m J_XkQR[Y B1I{@\z0G } @yQ1F>
t xU{0rM" dB&<P[$+8 /* FKe/xz **SiteInfoBean.java ,T^A?t */ DqI "B package NetFox; Cnc=GTRi Uw5&.aqn.b 7bGOE_r public class SiteInfoBean { >pol'= cN2Pl%7 n Jz* }= private String sSiteURL; //Site's URL uHZjpMoM private String sFilePath; //Saved File's Path q)@;8Z=_c private String sFileName; //Saved File's Name /r&4< @ private int nSplitter; //Count of Splited Downloading File -J'ked pp#!sRUKPV %k"hzjXAw public SiteInfoBean() TgLr4Ex {//nSplitter的缺省值为5 "WPWMQ+ //default value of nSplitter is 5 q+;lxR5D this("","","",5); RZ9_*Lq7+ } YXF^4||j.c jCx*{TO \O~WMN public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ?}uvpB1} { "}[ ]R sSiteURL= sURL; OB+ cE4$ sFilePath = sPath; kA2)T,s74 sFileName = sName; HFYe@ 2r this.nSplitter = nSpiltter; RN&8dsreZp `USze0"t0: Q2m 5&yy@s } .G<Or`K^i iHdX <P*7u\9& public String getSSiteURL() tqt~F2u { Xp6Z<Z&N return sSiteURL; wk=s3^ } x6\^dVR} )1YGWr;ykS p lzwk>b_ public void setSSiteURL(String value) 4VA]S { ?H{?jJj$H sSiteURL = value; O!F"w!5@ } jC-`u-_'j i4SWFa`` a6d|Ps.\! public String getSFilePath() f?@M"p@T { ?f5||^7 return sFilePath; .Rb4zLYL*w } '&]6(+I> d%!yFix;< L<Z2 public void setSFilePath(String value) ?Qpi(Czbpq { e&mTaCLG sFilePath = value; @ L/i } -H5-6w$ #TgP:t]p *JWPt(bnI public String getSFileName() cvpZF5mL]U { Sx_j`Cgy return sFileName; n@oSLo`k,` } |>Pv2 %P*b&H^0
sBE@{w% public void setSFileName(String value) E
/ycPqD { On+0@hh sFileName = value; j{m{hVa } PhmtCp0-7- /sSif0I24 C+C1(b;1 public int getNSplitter() e.|t12)L " { :yOJL [x return nSplitter; pQm-Hr78j } v1NFz>Hx ,` $2 (<|1/^~= public void setNSplitter(int nCount) q}&+{dN\1 { You~
6d6Om nSplitter = nCount; $K1)2WG } L$ju~0jl)% } DVBsRV)/ NVDvd6 (Q|Y*yI /* z2dW)_fU$ **Utility.java NE@P8pQ> */ %1i *Y*wg package NetFox; .n}k,da@( I=8MLv l-'\E6grdH public class Utility { ?&b"/sRS z)*\njYe 1| xKb(_l public Utility() OJLyqncw { YgkQF0+ ksqb& ux6 fp"GdkO#}i } R1:7]z0B `u8=~]rblj //线程睡眠 y$?O0S%F public static void sleep(int nSecond) Z
Mf,3 { O$Dj_R# try{ T%2%*oa Thread.sleep(nSecond); VmTgD96 }
&y7~
catch(Exception e) dQ Ao~]B { 2-wgbC5 e.printStackTrace (); 6c[ L*1 } Sr6?^>A@t } wq#'o9s, =ZARJ40L //日志 `6G:<wX public static void log(String sMsg) u$1^= { .wuRT>4G)G System.err.println(sMsg); 7"k\i= } yL3F oeG?2!Zh CSE!Abg public static void log(int sMsg) w"h'rw { zvbz3 a System.err.println(sMsg); EJTa~ } K`cy97 } h56s ~(?O zXeBUbVi MAG/7T5 /* C2K<CDVw **TestMethod.java 3;EBKGg| */ elb}]
+ package NetFox; qo}u(pOj| bg,VK1 $/P\@|MqYQ public class TestMethod { 8EZ,hY^ D+Z,;XZ vP/sG5$x public TestMethod() ; DI"9 { ///xx/weblogic60b2_win.exe ]iiB|xT try{ wafws*b% SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); `>{S?t< //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); yTU'voE.| SiteFileFetch fileFetch = new SiteFileFetch(bean); wW'.bqA fileFetch.start(); -.7UpDg~ } <D(|}5qR catch(Exception e){e.printStackTrace ();} ~fly6j|u L(kW] cN#f$ } ;UWp0d%
x/#.%Ga#T ?}U l( public static void main(String[] args) eLop}*k { o%73M!- new TestMethod(); hKFB=U } m\J"P'= } 7e@Bkq0) 点击下载更多相关资料
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