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/* y{3+Un **SiteFileFetch.java %.`u2'^ */ s|XWw<Sa package NetFox; ZJWpb import java.io.*; &'k(v(>n, import java.net.*; B6&[_cht ~x9J&*zxM 1o\2\B=k{ public class SiteFileFetch extends Thread { Heh&;c Jy}~ZY h9m|f|cH SiteInfoBean siteInfoBean = null; //文件信息Bean c"kB @P
long[] nStartPos; //开始位置 %>+lr%B long[] nEndPos; //结束位置 c.LRS$o/j FileSplitterFetch[] fileSplitterFetch; //子线程对象 tik*[1it long nFileLength; //文件长度 3YLfh`6 boolean bFirst = true; //是否第一次取文件 hY{4_ie=8 boolean bStop = false; //停止标志 -E6av|c,F File tmpFile; //文件下载的临时信息 )! rD&l$tE DataOutputStream output; //输出到文件的输出流 k?Hi_;o LvS5N)[ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Ws3z-U>j public SiteFileFetch(SiteInfoBean bean) throws IOException Ww8U{f { )?radg siteInfoBean = bean; jEQ_#KKYJ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); wxK71OH tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); )vOBF5 if(tmpFile.exists ()) g,WTXRy { T2]8w1l&K bFirst = false; 4.,|vtp read_nPos(); ^kcuRJ0*$ } 3 $%#n* else w)S 4Xi= { ZGH
7_K nStartPos = new long[bean.getNSplitter()]; FLQke"6i0: nEndPos = new long[bean.getNSplitter()]; j}Svb1A } m=E/um[D :kI[Pf!z vgtAJp+p* mz1m^p)~{ } AaB1H7r- $H3C/| dkEbP*yXg public void run() DI;LhS*z { g&p(XuN //获得文件长度 <?KgzIq2 //分割文件 ~DxuLk6
s //实例FileSplitterFetch sdCG}..` //启动FileSplitterFetch线程 V}<<?_ //等待子线程返回 fFbJE]jW try{ c%,ky$'18 if(bFirst) )Rbt0 { J|U~W
kW nFileLength = getFileSize(); oq|o"n)~ if(nFileLength == -1) KQ9w>!N[ { rC|nE=i System.err.println("File Length is not known!"); ]5
]wyDj }
AX+]Z$ else if(nFileLength == -2) \NDW@!X { AX{<d@z`j System.err.println("File is not access!"); |j'@no_rv } DC>?e[oOz else V]Ccj\Oi { *wqR .n? for(int i=0;i<nStartPos.length;i++) _G-6G=q { VWdTnu nStartPos = (long)(i*(nFileLength/nStartPos.length)); Tg@G-6u0c } .Gr"|uII for(int i=0;i<nEndPos.length-1;i++) 3nhQ^zqf { 9({ 9 r[U nEndPos = nStartPos[i+1]; ;6 d-+(@ } )N^fSenFBn nEndPos[nEndPos.length-1] = nFileLength; {c?{M.R } ^|h_[> } 2.);OFk+ 7?k3jDK
MTE1\, //启动子线程 1=+S'_j fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; *dB3Gu{
+ for(int i=0;i<nStartPos.length;i++) 9b-4BON{P { %<Qv?`B fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &=%M("IlD siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ;A"i.:ZT nStartPos,nEndPos,i); tD}{/`{_t Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); !Y UT* fileSplitterFetch.start(); Q rSO%Rm1* } h
Ks
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Wn;%B].I siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); '^7Z]K <v // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", mBrZ{hqS nEndPos = " + nFileLength); h8M}} // fileSplitterFetch[nPos.length-1].start(); 4>Ht_B<< H
9/m6F JT6Be8
//等待子线程结束 `3K."/N6c //int count = 0; IYptNR //是否结束while循环 UZiL NKc boolean breakWhile = false; <uoVGV5N 0.!vp?
874j9ky[ while(!bStop) j";L{ { e5FF'~A%] write_nPos(); s;Z i Utility.sleep(500); 56C'<# breakWhile = true; _8`S&[E? P%w!4v~" M9VAs~&S for(int i=0;i<nStartPos.length;i++) OHngpe4 { g
p|G q if(!fileSplitterFetch.bDownOver) z:O:g?A { =VWH8w.3 breakWhile = false;
0lqh;/ break; l'!_km0{d } %dmQmO, } I L&PN`# if(breakWhile) E'+z.~+
break; xw~oR|`U _iqaKYT$ -yIx:*KI //count++; n]l3
)u //if(count>4) 7we='L&R // siteStop(); / 8dRql-Ne } SZxnYVY HsG3s?* 44^jE{,9 System.err.println("文件下载结束!"); ] : ](xW% } qw|B-lT{: catch(Exception e){e.printStackTrace ();} ~:0U.v_V } *&_(kq z'1 0'5N[Bvp ?v+el, //获得文件长度 s/;S2l$` public long getFileSize() #cJ1Jj $ { $G/p[JG6- int nFileLength = -1; {>ghX_m| try{ >^@~}]L URL url = new URL(siteInfoBean.getSSiteURL()); Zwtz )ZII HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); HR'F httpConnection.setRequestProperty("User-Agent","NetFox"); 6_w~#86= bI;u};v XaU^^K int responseCode=httpConnection.getResponseCode(); oC!z+< if(responseCode>=400) wUS w9xg { ncR]@8 processErrorCode(responseCode); Q`=d5Uvw return -2; //-2 represent access is error \$,;@H5I^ } k_OzkEM9! 1NN#-U &6\E'bBt String sHeader; A(C0/|#V y]k{u\2A ,}^;q58 for(int i=1;;i++) *'@T+$3s { ? a*yK8S //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); N40DL_- //Utility.log(in.readLine()); 9~r8$,e sHeader=httpConnection.getHeaderFieldKey(i); `Z@qWB< if(sHeader!=null) w/ID yQ { Jd|E
4h~( if(sHeader.equals("Content-Length")) <5|:QLqy { '_n$xfH nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 0e'@Xo2e break; k <LFH( } 7X/B9Hee } ;T!ZO@1X else Z7MGBwP( break; 0n?^I>j } +'g~3A-G } |)ALJJ=+ catch(IOException e){e.printStackTrace ();} 3qp\jh=FE catch(Exception e){e.printStackTrace ();} v?q)E%5j p"Di;3!y! f F9=zrW Utility.log(nFileLength); Is (
Ji Ez^wK~ Q"GZh.m return nFileLength; ML1/1GK*i+ } R8,
g^N m8 *)@e N<HJ}geC" //保存下载信息(文件指针位置) n--s[Kdo8 private void write_nPos() U,\t2z { )3!z2f: e try{ k`0m|<$ output = new DataOutputStream(new FileOutputStream(tmpFile)); Q,>]f@m output.writeInt(nStartPos.length); {@X)=.Zf for(int i=0;i<nStartPos.length;i++) _s0;mvz' { S1*xM // output.writeLong(nPos); @$|bMH*1: output.writeLong(fileSplitterFetch.nStartPos); [jKhC<t} output.writeLong(fileSplitterFetch.nEndPos);
t "[2^2G } !ac,qj7spa output.close(); Vfr.Yoy } ]RI+:f catch(IOException e){e.printStackTrace ();} mv`ND& catch(Exception e){e.printStackTrace ();} /Nd`eUn } JHsxaX;c zW ; sr. 2Ni {fC? //读取保存的下载信息(文件指针位置) '!XVz$C private void read_nPos() oMb@)7 { kfs[*ku try{ Uj)`(}r DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 5oY^;)\/ int nCount = input.readInt(); K!|J/W nStartPos = new long[nCount]; =D^R,Q nEndPos = new long[nCount]; J+Zp<Wu- for(int i=0;i<nStartPos.length;i++) !='L `. { AbOF/g)C nStartPos = input.readLong(); -pm%F8{T] nEndPos = input.readLong(); >+ku:<Hw%. } ys}I~MK - input.close(); EpH\;25u } z CFXQi catch(IOException e){e.printStackTrace ();} Jw
-3G3h catch(Exception e){e.printStackTrace ();} sK|+&BC } "l-R|>6~ OP\m~1 mqoB]H, private void processErrorCode(int nErrorCode) nW_cjYS% { \2y[Hy? System.err.println("Error Code : " + nErrorCode); LVBE+{P\5? } )SWLX\b ![aa@nOSa 8/ PS#dM\ //停止文件下载 .]K{8[:hq public void siteStop() :z%q09.) { %1kIaYZ bStop = true; <2fgao&-n for(int i=0;i<nStartPos.length;i++) 7NQEn Al fileSplitterFetch.splitterStop(); a/lTQj]A %bgUU|CdA Kr@6m80E5 } =$F<Ac;& } yey]#M[y //负责部分文件的抓取 t/(rB} **FileSplitterFetch.java R2f^dt^ */ h%>yErs package NetFox; (cm8x 9 wP,Z" I*l y
7z import java.io.*; cPPTGpqw import java.net.*; %HcCe[d5l }<=_&n "<yJ<lS&> public class FileSplitterFetch extends Thread { klx28/] Q-y`IPtA< J*+[?FXRL String sURL; //File URL Zd8`95 long nStartPos; //File Snippet Start Position u\o~'Jz long nEndPos; //File Snippet End Position {Z^q?~zC[ int nThreadID; //Thread's ID D`2w>{Y boolean bDownOver = false; //Downing is over fsUZG6 boolean bStop = false; //Stop identical w'a3=_nW FileAccessI fileAccessI = null; //File Access interface rE9Nt9} S0!w]Ku }5lC8{wZ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException p?'&P! { x5eSPF1 this.sURL = sURL; -$cO0RSY this.nStartPos = nStart; b VcA#7
uA this.nEndPos = nEnd; ~Nn}FNe nThreadID = id; O#x=iZI fileAccessI = new FileAccessI(sName,nStartPos);//定位 OzUo}QN } ;><m[ l6 aQglA P$*9Z@ public void run() WSOz^] { /G= ?E]^ while(nStartPos < nEndPos && !bStop) -qdt$jIM { 28LYGrB
Pd;G c@'~ q:u,)6 try{ tYMPqP,1. URL url = new URL(sURL); 9G^gI}bY HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ZMO ym= httpConnection.setRequestProperty("User-Agent","NetFox"); WGHf?G/s String sProperty = "bytes="+nStartPos+"-"; 40HhMTZ0- httpConnection.setRequestProperty("RANGE",sProperty); #;/ob- Utility.log(sProperty); 1EA#c>I$ d VyT ` 3U%kf<m= InputStream input = httpConnection.getInputStream(); R 0YWe //logResponseHead(httpConnection); y'm5Z-@o6 'C)
v?!19 *g[MGyF" byte[] b = new byte[1024]; Cm;M;
? int nRead; &6nLnMF8x while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) nfksi``Vq { hd@jm^k nStartPos += fileAccessI.write(b,0,nRead); 2&XNT-Qm //if(nThreadID == 1) Tb}op XYK // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *1,4#8tB } IO<Ds#( heQyz|o |G/WS0 Utility.log("Thread " + nThreadID + " is over!"); 2ae"Sd!-2 bDownOver = true; <"{VVyK //nPos = fileAccessI.write (b,0,nRead); z['2 } ~,.'#=V catch(Exception e){e.printStackTrace ();} )
(0=w4 } DqHJ *x4 } UHR%0ae Lr0:yo Y-lTPR<Eq //打印回应的头信息 G%viWWTY public void logResponseHead(HttpURLConnection con) (@V_47o { |!{ Y:f; for(int i=1;;i++) `N8t2yF { *auT_* String header=con.getHeaderFieldKey(i); (#8B if(header!=null) z0@BBXQ` //responseHeaders.put(header,httpConnection.getHeaderField(header)); ox5WboL Utility.log(header+" : "+con.getHeaderField(header)); Z?u}?-b1\H else 3%)@c P:? break; (C0Wty } UjS+Ddp } /[E2+g b>Ea_3T/ OAf}\ public void splitterStop() ~I;|ipK4m { |G_, 1$ bStop = true; l2ie\4dK@ } k~)@D| ? *Sps^Wl h
s_x
@6 } zI4d|P 2S-f5&o #_WkV /* -F_cBu81V **FileAccess.java `\GRY @cg *//文件访问(定位,写) \,'4eV package NetFox; A?ho<@^ import java.io.*; u;+8Jg+xH/ RAWzQE} I51I(QF= public class FileAccessI implements Serializable{ 3)I]bui @saK:z //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 @WNqD*)1 RandomAccessFile oSavedFile;
~t n$AtK long nPos; 2MmHO2 f3S 8~! ubRhJ~XB public FileAccessI() throws IOException (2UA , { }B_?7+ this("",0); 70 Ph^e) } r6GXmr Kg`P@ X,bhX/h public FileAccessI(String sName,long nPos) throws IOException Lp/'-Y_ { !{ fu(E oSavedFile = new RandomAccessFile(sName,"rw"); c\/-*OYr< this.nPos = nPos; q" EW*k+
) oSavedFile.seek(nPos); {Qc,Nl
[? } xojt s;n
F{^\vFp Y`d@4*FN$ public synchronized int write(byte[] b,int nStart,int nLen) '#SZ|Rr6tX { )O5@R int n = -1; :{4C2qK> try{ \;KSx3o oSavedFile.write(b,nStart,nLen);
q*94vo- n = nLen; /:ZwGyT; } vG7Mk8mIr catch(IOException e) r+h%a~A#> { Xu
E' %;: e.printStackTrace (); g9CedD%40 } C#e :_e] QUaV;6
4 +~
Hb}0ry return n; V^4v`}Wgx }
;u[:J &n6L;y- dm]g:KWg } RN|Bk u})*6 l. mln4Vl(l2M /* WrcmC$ff **SiteInfoBean.java #d*0
)w */ RyU8{-q package NetFox; 5*+DN
U@ 'J3yJ{ 7VG*Wu public class SiteInfoBean { -agB ]j _>n)HG yf!7
Q>_G^ private String sSiteURL; //Site's URL A FBH(ms't private String sFilePath; //Saved File's Path P3-O)m]jv private String sFileName; //Saved File's Name o.w/? private int nSplitter; //Count of Splited Downloading File _|W&tB* ?i V}U m mZP; public SiteInfoBean() 'wtb"0 } {//nSplitter的缺省值为5 {&XTa`C //default value of nSplitter is 5 tzfyS#E this("","","",5); B9[vv;lzu } ~cyKPg6 60]VOQku |&xaV-b9W public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) wN10Drc
{ 4`mf^Kf sSiteURL= sURL; Ph%ylS/T{ sFilePath = sPath; {[`(o
0@( sFileName = sName; I'^XEl? this.nSplitter = nSpiltter; !.^x^OK%y \y%"tJ~N{ 9C2pGfEbn} } EpKZ.lCU #d3_7rI0V V= p"1!( public String getSSiteURL() e$P^},0/ { TB?'<hD: return sSiteURL; 0Ze&GK'Hf } .>}I/+n R9^vAS4t[O H\n6t-l public void setSSiteURL(String value) DTuco9yr[ { EC0B6!C&7 sSiteURL = value; ;dMr2y`6 } H! 5Ka#B 8+dsTX`|S JP0aNu public String getSFilePath() -^yc<%U { fZr{x$]N0 return sFilePath; a%BC{XX } 3UW`Jyd`k uL-kihV:- &=*1[ j\ public void setSFilePath(String value) =,q/FY: { lhJY]tQt/ sFilePath = value; t#_6GL } _Dqi#0#40p Lg(G&ljE@k V`LE 'E public String getSFileName() j^8HTa0Cy| { sC[#R.eq return sFileName; sk<S`J,M/_ } 88X]Uw(+ =WI3#<vDG D</?|;J#/ public void setSFileName(String value) R!7--]Wcg { .sQV0jF { sFileName = value; !`7evV: } T+~&jC:{ H1%o)'Kut4 l{.PyU5) public int getNSplitter() Lg,ObVt! { 0PFC%x return nSplitter; +PLJ } #K@!jh)y^ LgX2KU" 8YE4ln public void setNSplitter(int nCount) 04=RoYMM { ^`dMjeF nSplitter = nCount; *oIIcE4g7 } 0S; Ipg } t4d/%b~{:U YGM7? o 0vDvp`ie#4 /* roAHkI **Utility.java 2B6u)
95 */ Gs|a$^V|o package NetFox; %
q!i ]e5aHpgR= @oj_E0i3 public class Utility { F?MVQ!K* %La/E# <3tf(?*,k] public Utility() SJO*g&duQ { z=>P jIW >k@{NP2b r/0#D+A } 7^Us q[vO
mes //线程睡眠 S/y(1.wh public static void sleep(int nSecond) FMn|cO.vEP { d^$cx(2$D try{ GmJ
\3]{PZ Thread.sleep(nSecond); rVsCJuxI } i@WO>+iB catch(Exception e) tRc3<> { J32{#\By e.printStackTrace (); `WC4:8
} bT9:9LP } S\sy^Kt~4: y|*4XF<b //日志 ho~WD'i public static void log(String sMsg) L{&1w { gMq; System.err.println(sMsg); =? q&/
cru } I|Hcs.uW d/*EuJYin< \!uf*=d public static void log(int sMsg) )PU\|I0|)e { s/E9$*0 System.err.println(sMsg); 6rG7/ } U:MZN[Cc[ } Ue,eEer 23p.g5hJi 5HL>2
e[ /* a04S&ezj **TestMethod.java jamai8 */ }l]r- package NetFox; HP 3%CB E6G;fPd= E T?u*ey~Tv public class TestMethod { Y%]g,mG 6~s{HI! c(?O E'
"Z public TestMethod() ?&1%&?cg9 { ///xx/weblogic60b2_win.exe rSW{1o' try{
ji ,`? SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); >2mY% //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); aOoWB^;6 SiteFileFetch fileFetch = new SiteFileFetch(bean); [czWUD fileFetch.start(); :t+LuH g } 5HvYy
*B/ catch(Exception e){e.printStackTrace ();} O,J,Q|`H& ov!L8
9`[u lu1T+@t } 5=8_Le hiR+cPSF l>HB 0o public static void main(String[] args) =5%}CbUU)4 { ={ 190=\9 new TestMethod(); ;lTgihW- } <_bGV } b%X}{/ n 点击下载更多相关资料
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