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/* k=r)kkO) **SiteFileFetch.java p@bcf5' */ *w_f-YoXp package NetFox; O a#m}b import java.io.*; Mg}8 3kS import java.net.*; ? bnhx 4.}J'3 . z8\;XR public class SiteFileFetch extends Thread { K_t!P U2)y fhI >Pw
ZHY SiteInfoBean siteInfoBean = null; //文件信息Bean \`$RY')9|! long[] nStartPos; //开始位置 ~lB:xVzn long[] nEndPos; //结束位置 R6/vhze4L2 FileSplitterFetch[] fileSplitterFetch; //子线程对象 'q9='TOk long nFileLength; //文件长度 990sE
t? boolean bFirst = true; //是否第一次取文件 X'KkIo
: boolean bStop = false; //停止标志 9;k!dM File tmpFile; //文件下载的临时信息 XVNJ3/ DataOutputStream output; //输出到文件的输出流 GO=3<Q{; )OgQ&,# //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) D?<R5zp public SiteFileFetch(SiteInfoBean bean) throws IOException c
DO<z { dLIZ)16& siteInfoBean = bean; ] f~mR_E //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); _aLml9f
W tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); =Zc
Vywz;+ if(tmpFile.exists ()) QwL'5ws{q { sU}.2k bFirst = false; FsyM{LT read_nPos(); c<J/I_! } WG?;Z else soi.`xE { tW#=St0<.o nStartPos = new long[bean.getNSplitter()]; j/Rm~!q nEndPos = new long[bean.getNSplitter()]; ZQQ0} } f}U@e0Lsb e-.s63hm "G,$Sqi@ MEZc/Ru-[ } @5y ~A}Vd 7)y9%-} D%=FCmL5@= public void run() g<"k\qs7 { ;zc,vs //获得文件长度 ON~K(O2g( //分割文件 l{b*YUsz> //实例FileSplitterFetch :4,
OA //启动FileSplitterFetch线程 DHnu F@M //等待子线程返回 _[_mmf1;:' try{ 3vK,vu q if(bFirst) c5e
wG { Z 71.* nFileLength = getFileSize(); $7bl,~Z if(nFileLength == -1) :?.RZKXQF { bRzw.(k0`r System.err.println("File Length is not known!"); \L@DDK|"`6 } ]E/~PV else if(nFileLength == -2) 3]u[NR { <h7FS90S System.err.println("File is not access!"); TUaW' } 0~0OQ/>7 else Yo$
xz { fqcFfz6?x for(int i=0;i<nStartPos.length;i++) ]sf1+3 { aHvsgp] nStartPos = (long)(i*(nFileLength/nStartPos.length)); u:FFZ } ~-.^eT kP for(int i=0;i<nEndPos.length-1;i++) +~~&FO2 { D)*OQLHW nEndPos = nStartPos[i+1]; ]J%p&y+6 } @&G< Np` nEndPos[nEndPos.length-1] = nFileLength; 6YCFSvA#/ } k-uwK-B}v+ } rIg5Wcd o :tz_5 Xob,jo}a //启动子线程 KNw{\Pz~w fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; @Ht7^rz+S for(int i=0;i<nStartPos.length;i++) :J{| /"== { H^<LnYZ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 609_ZW;) siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), X>`5YdT~+ nStartPos,nEndPos,i); :jc
?T Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )GpH5N'EI fileSplitterFetch.start(); ^*fZ } xc HG5bg| // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ojA i2uz siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); pDg_^| // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8'Y7lOXS nEndPos = " + nFileLength); 8 FqhSzw // fileSplitterFetch[nPos.length-1].start(); 1sT%g}w@| foOwJ }JU gPu0j4&- //等待子线程结束 JXBTd=r_oM //int count = 0; #cRw0bn: //是否结束while循环 7oK7f=*Q boolean breakWhile = false; lW!}OzE(m )O~V3a \z4I'"MC.9 while(!bStop) !7KSNwGu { GkT:7`|C write_nPos(); ~fDMzOd Utility.sleep(500); }zkMo? breakWhile = true; *yx&4)Or HZHzjrx M^E\L
C for(int i=0;i<nStartPos.length;i++) GT)63| { wLDWD,"K if(!fileSplitterFetch.bDownOver) bJz}\[z { O"<W<l7Q breakWhile = false; -or^mNB_z break; aNLkkkJg<; } >pVrY;
P[ } opKk#40 if(breakWhile) (np %urx! break; D]s8w x'.OLXx> z`^DQ8+\j //count++; z DP //if(count>4) .)zX<~, // siteStop(); Wx i|(} } 4K(AXk z/,qQVv=}4 7HpfHqJ7 System.err.println("文件下载结束!"); =ca<..yh[d } WI?iz-,]( catch(Exception e){e.printStackTrace ();} 7I,/uv? } F>0[v|LG
UA{tmIC\ h#o3qY //获得文件长度 ~_z"So'|F_ public long getFileSize() nJvDk h#h1 { &7{/ x~S{ int nFileLength = -1; I.M@we/bR} try{ t~luBUF URL url = new URL(siteInfoBean.getSSiteURL()); %4%$NdU" HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [^cflmV httpConnection.setRequestProperty("User-Agent","NetFox"); 4rmSo^vK Gl1Qbd0 7.r}98V int responseCode=httpConnection.getResponseCode(); Aj9Onz,Lg if(responseCode>=400) : *~}\M* { M%3 \]& processErrorCode(responseCode); x}`]9XQ return -2; //-2 represent access is error qm.30 2 } +EmT+$>J nj (/It ~4YLPMGKl String sHeader; GAZw4dz C^o9::ER ;Jn"^zT for(int i=1;;i++) 7#
/c7 { C/JeD-JG //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); S~8w- lG! //Utility.log(in.readLine()); &?],uHB?d sHeader=httpConnection.getHeaderFieldKey(i); $/*6tsR if(sHeader!=null) Tr^Egw] { rcC}4mNe if(sHeader.equals("Content-Length")) nTJ-1A7EP { 3
e19l!B nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); uG|d7LS,% break; _?vh#6F } sg.8Sd"]7 } QW5S=7 else \k#|[d5W break; an4^(SY } ,~R`@5+ } BVKr 2v catch(IOException e){e.printStackTrace ();} "5KJ /7q! catch(Exception e){e.printStackTrace ();}
g1je': t8"*jt COE,pb17 Utility.log(nFileLength); +s*OZ6i [ %TY;}V59 b fQ\nK H~ return nFileLength; !n=?H1@ } NhI&wl D# $Fj BZ] 6W/0 //保存下载信息(文件指针位置) {*=+g>RgD private void write_nPos() UBmD
3|Zo { re\@v8w~ try{ LqH<HGMFD output = new DataOutputStream(new FileOutputStream(tmpFile)); 2k
}:)]m output.writeInt(nStartPos.length);
c]#+W@$ for(int i=0;i<nStartPos.length;i++) `5[$ 8; { Q^&oXM'x/i // output.writeLong(nPos); B? Vr9H 7n output.writeLong(fileSplitterFetch.nStartPos); S~dD ;R output.writeLong(fileSplitterFetch.nEndPos); KjrUTG0oA } ~wMdk9RQ output.close(); Bs@!S? } *4i)aj catch(IOException e){e.printStackTrace ();} O8;`6r catch(Exception e){e.printStackTrace ();} A`=;yD } F{:ZHCm %idn7STJ} X5@SLkJ-` //读取保存的下载信息(文件指针位置) ^w0V{qF{ private void read_nPos() 61Z#;2] { (M1HNIM;( try{
Wc}opp DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); DFgr,~ int nCount = input.readInt(); uHBEpqC% nStartPos = new long[nCount]; ZP@or2No% nEndPos = new long[nCount]; +d[A'&" for(int i=0;i<nStartPos.length;i++) *]ROUk@K= { bv.DW,l%' nStartPos = input.readLong(); QT1(= wK3 nEndPos = input.readLong(); ugtzF } }Yi)r*LI3 input.close(); dmq<vVxC } t SST.o3 catch(IOException e){e.printStackTrace ();} C~do*rnM^ catch(Exception e){e.printStackTrace ();} p!+7F\ } S?X2MX dQoZhE T;cyU9 private void processErrorCode(int nErrorCode) Wq bfZx { g/)$-Z)Nu System.err.println("Error Code : " + nErrorCode); 59?@55 } -#=y .k{omr&Dy5 |G2hm8
Y //停止文件下载 \JJ>y public void siteStop() 4=j,:q { :ZP4(} bStop = true; [x{S ,?6 for(int i=0;i<nStartPos.length;i++) ] gN]Cw\L fileSplitterFetch.splitterStop(); Z_Gb9 Xx;RH9YYz '%W'HqVcG1 } U6hT*126 } ]dXHjOpA //负责部分文件的抓取 rsbdDTy **FileSplitterFetch.java PGT*4r21 */ @W\y#5"B package NetFox; (nhv#&Fd+ br!:g]Vh OL,3Jh% x import java.io.*; DzZ)aE import java.net.*; G2FP|mf, U Ox$Xwp5& oDyrf"dl public class FileSplitterFetch extends Thread { -IBf;"8f Sm(QgZO[4 9Fe(],AzF String sURL; //File URL M`W%nvEDE long nStartPos; //File Snippet Start Position (S:+#v long nEndPos; //File Snippet End Position traJub int nThreadID; //Thread's ID oo{5: boolean bDownOver = false; //Downing is over ~R`Rj*Q2Y boolean bStop = false; //Stop identical
G P"(+5 FileAccessI fileAccessI = null; //File Access interface 7g-#v'.N btq`[gAF\ fIrl?X'] public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException aBPaC=g{HO { yOn +Y this.sURL = sURL; `O-LM e this.nStartPos = nStart; T [w]w
this.nEndPos = nEnd; }$K2h* nThreadID = id; %-~W|Y fileAccessI = new FileAccessI(sName,nStartPos);//定位 \]y4e^FZZ } uV]4C^k;`[ ,hj5.;M zVLv-U/=d public void run() ?[4!2T,Ca { Ua.7_Em while(nStartPos < nEndPos && !bStop) ?Rc+H;x=f { ,2F4S5F~rC 8^fkY'x JPS7L} Kv try{ M Cam c URL url = new URL(sURL); .xtjB8gc HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); B/IPG~aMEZ httpConnection.setRequestProperty("User-Agent","NetFox"); F+;{s(wx String sProperty = "bytes="+nStartPos+"-"; o C]tEXJ httpConnection.setRequestProperty("RANGE",sProperty); c65_E<5Z Utility.log(sProperty); GW]E,a :kycIM]s =e7,d$i InputStream input = httpConnection.getInputStream(); <B]\& //logResponseHead(httpConnection); &Mset^o N0be=IO5# zcrLd={ byte[] b = new byte[1024]; {;(X#vK}9 int nRead; LGN,8v<W( while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) /Kmzi9j+ { (wmMHo| nStartPos += fileAccessI.write(b,0,nRead); X\SZ Q[gN //if(nThreadID == 1) !GkwbHr+p // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); xCH,d:n= } L[zg2y eSZS`(#!( B;'Dh<J1 Utility.log("Thread " + nThreadID + " is over!"); cH>rS\|Y bDownOver = true; sQ65QJtt0A //nPos = fileAccessI.write (b,0,nRead); ; 6Wlu3I } _m!TUT8o catch(Exception e){e.printStackTrace ();} |irqv< r } dw)SF, } %?^T^P 7@g8nv(p V/Hjd`n)`i //打印回应的头信息 |]a=He; public void logResponseHead(HttpURLConnection con) @Taj++ua { &z;;Bx0s for(int i=1;;i++) [@ ]f@Wd { _A*5BAB:h( String header=con.getHeaderFieldKey(i); jB]tq2i if(header!=null) %H:uE*WZ //responseHeaders.put(header,httpConnection.getHeaderField(header)); qvz2u]IOw Utility.log(header+" : "+con.getHeaderField(header)); Wjt1NfS& else `nccRy<l break; a^qLyF&F } \Q"o\:IoIT } [>"bL$tlo* 6JWCB9$4
^o+}3= public void splitterStop() @R=gJ:&a { ^5TSo&qZ bStop = true; v\*43RL } hR3lo;' l-"c-2-! "J]_B } nAn/V u @Md%gEh;& H{'<v|I /* :.['e` **FileAccess.java ^Yei9bXl *//文件访问(定位,写) "}UJ~ j). package NetFox; #Ag-?k import java.io.*; ko2Kz
k *>!O2c H4LZNko public class FileAccessI implements Serializable{ W=M`Bkw{ <}b`2/wP //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 &eV& +j RandomAccessFile oSavedFile; W)jO 4,eO long nPos; SU OuayE 9I8{2] >N>WOLbb7( public FileAccessI() throws IOException 9l2,:EQ* { &^e%gU8!\ this("",0); #%k!`?^fbK } *6~ODiB F)/}Q[o8 JqTkNKi/s public FileAccessI(String sName,long nPos) throws IOException &P&LjHFK { V6"<lK8" oSavedFile = new RandomAccessFile(sName,"rw");
#|fa/kb~ this.nPos = nPos; vCT5do"C& oSavedFile.seek(nPos); 4g]Er<-P } ?Y2ZqI ~vnG^y>% e2Sm.H ' public synchronized int write(byte[] b,int nStart,int nLen) LtKiJ.j?A { t3K7W2bz int n = -1; D.o|pTZ try{ }f np}L oSavedFile.write(b,nStart,nLen); kf+]bV n = nLen; MZf$8R } 6Y6DkFdvrZ catch(IOException e) {g}!M^| { 6V\YYrUz e.printStackTrace (); S (](C } $5y%\A GHeJpS jr{C/B} return n; $$~x: iN } !7!xJ&/V 8;;!2>N uZ( I|N$ } L+Yn}"gIs ]kq{9b'; Qj~m;F! /* mdvooJ **SiteInfoBean.java LziEF-_ */ ;T~]|#T\6 package NetFox; #}L75 K^`3Bg j?%^N\9 public class SiteInfoBean { '/U[ ui0{ V{;! vt~ C{!L +]/ private String sSiteURL; //Site's URL /%|JP{ private String sFilePath; //Saved File's Path XVAyuuTg\ private String sFileName; //Saved File's Name
02:] private int nSplitter; //Count of Splited Downloading File A,i.1U"w8 G$pTTT6# $,q~ q^0 public SiteInfoBean() Htn=h~U`z {//nSplitter的缺省值为5 ,~8:^*0s //default value of nSplitter is 5 !/+ZKx("9 this("","","",5); i`/_^Fndyu } q\ FF)H ES!$JWK| /PG+ s6 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) =3OK3| { km2('t7? sSiteURL= sURL; r#iZ FL3q sFilePath = sPath; Jm$.$B&I sFileName = sName; }]_/:KUt this.nSplitter = nSpiltter; aAZS^S4v r=P)iE: l
T~RH0L } r2}u\U4> =; Gw=m( Gm;)Om_ public String getSSiteURL() o&P}GcEIw { $&/JY return sSiteURL; n/#zx:d? } 3ny>5A!;2 }S51yDV G_ tFt56/4 public void setSSiteURL(String value) zY~ { 5vs~8|aRo sSiteURL = value; nf&PDv1 } ;q]Jm C,7d Z"PPXv-<jY public String getSFilePath() _@9[c9bO { Hs/
aU_ return sFilePath; lo*OmAF } AE`X4 q i2KN^"v?N '?dO[iQ$: public void setSFilePath(String value) D+ mZ7&L { 2g~qVT, sFilePath = value; RUqN,C,m5I } aTS\NpK& XWN
ra <WFA3 public String getSFileName() G n"]<8yl~ { |N_tVE return sFileName; m3W:\LTTp } ST$~l7p )3# gpM Fw5|_@&k public void setSFileName(String value) _+PiaJ&' { T<(1)N1H` sFileName = value; #\s*>Z } .[&0FHnJ5 ap=m5h27 2Ya)I k{ public int getNSplitter() MuXp*s3[ { O O?e8OU return nSplitter; FsQeyh> } ,5oe8\uz
"1O!Ck_n {$D[l
hj public void setNSplitter(int nCount) O
]o7 { MB.\G.bV nSplitter = nCount; &_Kb;UVRj } j6v|D>I } -!MrG68
[U9b_` xi['knUi2- /* J1OZG6|e **Utility.java G8=2=/ ! */ e??tp]PLn package NetFox; ~C[p}MED m>yb}+ HVO
mM17 public class Utility { n%'M?o]DF TNe,'S,% Z9X<W` public Utility() MzjV>. { $ N`V%<W 9U[Gh97Sf ldp
x, } ql"&E{u? gc(Gc vdB\ //线程睡眠 AGaM
&x= public static void sleep(int nSecond) ^b|Z<oF { 3m3ljy try{ mGx!{v~i& Thread.sleep(nSecond); \7b-w81M- } +B(x:hzY9 catch(Exception e) {UqS q { wM.z/r\p e.printStackTrace (); g4b-~1[S } tUX4#{)q(j } ycYT1Sg8 2iOn\
^]x //日志 CTawXHM public static void log(String sMsg) l
e+6;'Q { :"m~tU3& System.err.println(sMsg); (w4w } y8} fj= WgHl.
:R m$N`Xj public static void log(int sMsg) m(0sG(A~ { 4I7B
#{ System.err.println(sMsg); \s_lB~"P!3 } rJLn=|uR } 3V=(P.A Tm J|*Z*m -s~6FrKy /* y?=W **TestMethod.java $ti*I;)h4 */ U'(Exr[ package NetFox; E/bIq}R6 K:!){a[ Xge]3Ub public class TestMethod { =BD} +(3 0$=Uhi
?O(@BT public TestMethod() BR&T,x/d { ///xx/weblogic60b2_win.exe ]5(T{ try{ 'I$-h<W SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); w+A:]SU //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); LDg"s0n# SiteFileFetch fileFetch = new SiteFileFetch(bean);
.'`7JU#{ fileFetch.start(); R Lnsy, } <//82j+px catch(Exception e){e.printStackTrace ();} eKRslMa mL5 Nu+# j
/d?c5 } (PVK|Q55y _N`'R.va WP(+jL^- public static void main(String[] args) 'Cki"4%< { 'u9,L FO new TestMethod(); 8H2zMIB } 3k YVk } N$'/J-^ 点击下载更多相关资料
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