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/* \"O5li3n **SiteFileFetch.java d0aXA+S% */ ReaZg ?:h package NetFox; =g#PP@X]D! import java.io.*; hG1$YE import java.net.*; KdEvu? ?qjdmB|w OgF[= public class SiteFileFetch extends Thread { CD`a-]6qA g NI1W@)
t ed:] SiteInfoBean siteInfoBean = null; //文件信息Bean zj`c%9N+ long[] nStartPos; //开始位置 <XeDJ8
' long[] nEndPos; //结束位置 N^;lp<{6? FileSplitterFetch[] fileSplitterFetch; //子线程对象 iXWHI3
long nFileLength; //文件长度 uKJ:)oyaCP boolean bFirst = true; //是否第一次取文件 4$Ai!a boolean bStop = false; //停止标志 j\uZo.Ot+ File tmpFile; //文件下载的临时信息 jX7K-L DataOutputStream output; //输出到文件的输出流 #
&v4c KXPCkNIN! //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) i2qN 0?n public SiteFileFetch(SiteInfoBean bean) throws IOException [c?0Q3F { '}hSh siteInfoBean = bean; \RDN_Z //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); u3h(EAH> tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ('z=/"(l if(tmpFile.exists ()) 7Jb&~{DVk { $[T~<I bFirst = false; uX7L1~s- read_nPos(); FWW4n_74 } 0)dpU1B#M else :|j[{;asY { ,+i^]yF3j nStartPos = new long[bean.getNSplitter()]; nDrRK nEndPos = new long[bean.getNSplitter()]; RZz?_1' } uz3cho' Y9abRrK +R~]5Rxd e@hPb$7 } :DH@zR `gl?y;xC !&U75FpN}: public void run() <$nPGz)} { ]TrJ*~ //获得文件长度 30h[&Oc //分割文件 Jk.x^ //实例FileSplitterFetch 8r(Vz //启动FileSplitterFetch线程 lO@-*m$
//等待子线程返回 Vz mlKVE try{ ]yOM if(bFirst) r`"_D%kc { ev&l=(hY nFileLength = getFileSize(); ]D6<6OB if(nFileLength == -1) kHK<~srB { }wf8y System.err.println("File Length is not known!"); sX?arI=_U } ~D5
-G?%$" else if(nFileLength == -2) '&CZ%&(Gw { 0hS&4nW System.err.println("File is not access!"); N<#J!0w } k7Nx#%xx else 4W>DW`{ { LsR<r1KDJ for(int i=0;i<nStartPos.length;i++) 2[w9#6ly { {A}T^q!m] nStartPos = (long)(i*(nFileLength/nStartPos.length)); <(E)M@2 } uz8eS'8 for(int i=0;i<nEndPos.length-1;i++) P0UR{tK { caEIE0H~ nEndPos = nStartPos[i+1]; 9^Xndo]y } +9HU&gQ3 nEndPos[nEndPos.length-1] = nFileLength; {r&r^!K; } &wNr2PHd# } <@7j37,R7V za6 hyd^ !d##q)D
f? //启动子线程 6UIS4_
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; X[J<OTj`$ for(int i=0;i<nStartPos.length;i++) 8z93ETv7` { -dMH>e0 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $;g*s?F* siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ceg\lE:8 nStartPos,nEndPos,i); lR?1,yLp Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _3
!s{ fileSplitterFetch.start(); Z@q1&}D! } )+FnwW // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3@F U-k,i siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); f?.}S]u5 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 5+GTK)D nEndPos = " + nFileLength); ,5 ,r. // fileSplitterFetch[nPos.length-1].start(); 2-S}#S}2C %YxKWZ/? u9_?c
G- //等待子线程结束 E.#JCO|(1 //int count = 0; 1mV
'
~W //是否结束while循环 X'd\b}Bm boolean breakWhile = false; D*L@I@
[ nR%w5oe tdU'cc?M while(!bStop) ,,FhE { 8Ogg(uS70' write_nPos(); Ez
<YD Utility.sleep(500); a[t"J*0 breakWhile = true; jhT/}"v DI{Qs[ i(rYc for(int i=0;i<nStartPos.length;i++) ?(s9dS,7wZ { |QrVGm@2 if(!fileSplitterFetch.bDownOver) !le#7Kii { Lh+7z>1 breakWhile = false; )~)T[S break; 8hV4l'Pa72 } :|l0x a } /p-k'387 if(breakWhile) @V4nc
'o. break; xfUV'=~( m[ S1 :hHKm|1FE //count++; V\Lh(zPt //if(count>4) *<9M|H~ // siteStop(); MDpx@.A, } ?zo7.R-Vac s$^ 2Cuhv vSQB~Vw8t System.err.println("文件下载结束!"); T+V:vuK } D<Z\6)|%I catch(Exception e){e.printStackTrace ();} Lxa<zy~b } 0l(G7Ju n`Ypv{+ {% ,[n=PJVw/ //获得文件长度 7CT446 public long getFileSize() s_u!
RrC { gd)VL}k int nFileLength = -1; 5"#xbvRS0H try{ &S^a_L: URL url = new URL(siteInfoBean.getSSiteURL()); H8c -/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |$T?P*pI. httpConnection.setRequestProperty("User-Agent","NetFox"); BQMo*I>I q|.0Ja @M*5q# s int responseCode=httpConnection.getResponseCode(); ud(w0eX if(responseCode>=400) en MHKN g { Zf)<)o* processErrorCode(responseCode); <.|]%7 return -2; //-2 represent access is error -P]onD
} NS4W!o;" T.!.3B$@] .v) A|{:2 String sHeader; `?N|{kb P\X$fD _hB7;N3 for(int i=1;;i++) r^d:Po { AQ-R^kT //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); O sIvW'$\ //Utility.log(in.readLine()); &53LJlL
Co sHeader=httpConnection.getHeaderFieldKey(i); )q+;+J`> if(sHeader!=null) E-rGOm" m { =HoA2,R) if(sHeader.equals("Content-Length")) b<g9L4s { h>NuQo* nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); c}7Rt|`c break; ]T<RC\o } :as2fO$? } i/DUB<>p6 else }5gQ dj[Y break; CIt@xi#I } p6{8t} } jivGkIj!8 catch(IOException e){e.printStackTrace ();} xirZ.wj W catch(Exception e){e.printStackTrace ();} M-f; ,> d_Y7/_i 5DeAH; Utility.log(nFileLength); NSh~O!pX tjy@sO/Q &C E){jC return nFileLength; 1`&"U[{ } %xwdH4_ PwxRu BG20R=p //保存下载信息(文件指针位置) JLxAk14lc private void write_nPos() gM#]o QOGE { Xpf:I try{ X04JQLhy" output = new DataOutputStream(new FileOutputStream(tmpFile)); DmpD`^?-L output.writeInt(nStartPos.length); yFqB2(Dv for(int i=0;i<nStartPos.length;i++) GA)t!Xg^ { p?sC</R // output.writeLong(nPos); ]OA8H[U-eA output.writeLong(fileSplitterFetch.nStartPos); [RUYH5>Ik output.writeLong(fileSplitterFetch.nEndPos); %wux#"8
} &p^8zE s output.close(); .\ces2, } @X>Oj . catch(IOException e){e.printStackTrace ();} jUX0sRDk catch(Exception e){e.printStackTrace ();} czp}-{4X } |rk4,NG. [Gb8o' r`CsR0[ //读取保存的下载信息(文件指针位置) OM7EmMa; private void read_nPos() u"1Zv! { )KD*G;<O]L try{ 39,7N2 uY DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); |`6*~ciUV int nCount = input.readInt(); H(j983 nStartPos = new long[nCount]; vqJjAls nEndPos = new long[nCount]; ;l=ZW for(int i=0;i<nStartPos.length;i++) +(|
,Ke { lK3Z}e*eXQ nStartPos = input.readLong(); (E?X@d iu nEndPos = input.readLong(); 3 At%TA: } %FO#j 6 input.close(); gflu!C6 } LYyOcb[x catch(IOException e){e.printStackTrace ();} .~dNzonq catch(Exception e){e.printStackTrace ();} ;JQ;LbEn } qm=N@@R& EAXbbcV 1$ C\` private void processErrorCode(int nErrorCode) \B~}s } { ?T <2Cl'C System.err.println("Error Code : " + nErrorCode); u IGeSd5B } leJ\ =6:>C9 J PK(S~ //停止文件下载 5ki<1{aVtZ public void siteStop() )> |x 2q { +&h<:/ V bStop = true; #)N}F/Od^ for(int i=0;i<nStartPos.length;i++) S4FR=QuVQC fileSplitterFetch.splitterStop(); Gg=Y}S7: &;Jg2f%. <^8&2wAkJ } GY,HEe]2r } U0X? ~ 1 //负责部分文件的抓取 9s'[p'[Z **FileSplitterFetch.java HTU?hbG( */ ijR,% qg package NetFox; 7awh__@ [b6P
}DW )Cfk/OnRd import java.io.*; ||t"}Y import java.net.*; :N
~A7@ L1J~D?q Y<0R5rO public class FileSplitterFetch extends Thread { ny{Yr>:2 XIJW$CY qTUyax String sURL; //File URL 9d_
Zdc long nStartPos; //File Snippet Start Position f,}9~r# long nEndPos; //File Snippet End Position rsgTd\b int nThreadID; //Thread's ID 8\/$cP"<^ boolean bDownOver = false; //Downing is over %DR8M\d1~H boolean bStop = false; //Stop identical aBonq]W FileAccessI fileAccessI = null; //File Access interface R+y 9JE )D"E] yO`HL'SMo public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException B
LI
9(@ { C=>IJ'G this.sURL = sURL; [uD G;We= this.nStartPos = nStart; 5b5Hc Inu this.nEndPos = nEnd; R
*uwp'@ nThreadID = id; TKBW2 fileAccessI = new FileAccessI(sName,nStartPos);//定位 VHihC]ks, } TtKV5 3"HW{= $\A=J public void run() H%z9VJ*!0 { waI:w, while(nStartPos < nEndPos && !bStop) 'Wz`P#/ { +<1MY'>y zt|DHVy g ONybz6] try{ ;S.o`z1GI URL url = new URL(sURL); Ufr,6IX HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /\0g)B;] httpConnection.setRequestProperty("User-Agent","NetFox"); }lP'bu String sProperty = "bytes="+nStartPos+"-"; (764-iv( httpConnection.setRequestProperty("RANGE",sProperty); 82*nC!P3E Utility.log(sProperty); o3OtG#g2 6(0ME$ j| Hyv{sM InputStream input = httpConnection.getInputStream(); $4ZjN N@ //logResponseHead(httpConnection); e"O c Z]\VOA> 6k- byte[] b = new byte[1024]; l1I\khS int nRead; aoP=7d|K/ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) QxI^Bx { <tx`#, nStartPos += fileAccessI.write(b,0,nRead); r(6$.zx //if(nThreadID == 1) a
0+W-#G // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); D@
4sq^|2 } B9h'}460H 2{;~Bgd r&_bk
Y% Utility.log("Thread " + nThreadID + " is over!"); VkJBqRzBOa bDownOver = true; ;5PBZ<w //nPos = fileAccessI.write (b,0,nRead); sf5 F$ } ~,O&A B catch(Exception e){e.printStackTrace ();} cy
@",z } %-J}m } ;:A/WU.^ 3s
B9t X .TpM3b#r //打印回应的头信息 /=IBK` public void logResponseHead(HttpURLConnection con) &~{0@/ { I:Q3r"1 for(int i=1;;i++) cfhiZ~."T { _k O<|ev String header=con.getHeaderFieldKey(i); \;bDDTM if(header!=null) 8qF OO3c\V //responseHeaders.put(header,httpConnection.getHeaderField(header)); @h)Z8so Utility.log(header+" : "+con.getHeaderField(header)); Nm4
h else '?)<e^ break; :F`-<x/ } c>.=;'2 } `m+o^!SGe P?/Mrz ~A$y-Dt'
public void splitterStop() .6HHUy { $3)Z>p bStop = true; e.VR9O]G } q:ah%x[ s)9d\{ O~DdMW } 6O\a\z h"ZR`?h -a\[`JHi /* !}I+)@~\w **FileAccess.java ={[9kR i *//文件访问(定位,写) Ce`#J6lT package NetFox; #Pr
w2u import java.io.*; )y"8Bx=x4 T7#}&> ,%<ICusZ public class FileAccessI implements Serializable{ ZZ2vdy38 JS2h/Y$ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 y*H rv RandomAccessFile oSavedFile; HVH <S long nPos; 7v]9) W=y 8d1r#sILI ,
G9{: public FileAccessI() throws IOException >eM>Y@8= { A3eus this("",0); b`&
:` } RcpKv;= iB ,,+iPGa< Wi<g public FileAccessI(String sName,long nPos) throws IOException Yc p<N>) { P TMJ.; oSavedFile = new RandomAccessFile(sName,"rw"); s~>0<3{5 this.nPos = nPos; W'" p:Uhq oSavedFile.seek(nPos); B0$ge"FK9 } UiQF4Uc" \$W\[s4I qW
2'?B3< public synchronized int write(byte[] b,int nStart,int nLen) Mem1X rBH { e]zd6{g[m int n = -1; ~ya@ YP]'; try{ EK2mJCC| oSavedFile.write(b,nStart,nLen); Aq;WQyZ2 n = nLen; 'y%*W:O } jeWI<ms catch(IOException e) 5fY7[{2 { Ng|c13A= e.printStackTrace (); fjh,e } 4 zhg# <*[D30< mRT$@xa]J return n; ^{g('BQx } "Ta"5XW iCIU'yI Ye]-RN/W }
[yx8?5 %_.
fEFy07 \'.|7{Xu /* s6(bTO. **SiteInfoBean.java `G "&IQ8. */ l|sC\;S package NetFox; cm17hPe`}n K+3+?oYKH }e]tn) public class SiteInfoBean { |32uC3?o 2g
HRfTF EYSBC", private String sSiteURL; //Site's URL :CGh$d] + private String sFilePath; //Saved File's Path Ci$?Hm9 n private String sFileName; //Saved File's Name bsv!z\} private int nSplitter; //Count of Splited Downloading File ]S7>=S NudY9~ yn|U<Hxl~H public SiteInfoBean() @M!nAQ8hY {//nSplitter的缺省值为5 @&f~#Xe //default value of nSplitter is 5 E-v^eMWX this("","","",5); IN?6~O
p } ~nRbb;M RC~ C} E~
+g6YlT public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ub9,Wd"^ { T;sF@? sSiteURL= sURL;
&Y jUoe sFilePath = sPath; a St:G*a" sFileName = sName; MeDlsO this.nSplitter = nSpiltter; CPci
'SO g_;4@jwTP" :vJ1Fo! } FJ] ?45 p-kug]qX B3Da w/G public String getSSiteURL() (y5]]l { @cB6,iUr return sSiteURL; S7(tGD } s|D[_N!| &Ivf!Bgm{Z -+fW/Uo public void setSSiteURL(String value) k{J\)z { cv"Bhql sSiteURL = value; JQDS3v=1$ } z-JYzxL9 'J8Ga<s7C n8Rsle`a public String getSFilePath() `%_(_%K { ?/}-&A" return sFilePath; _rz7)%Y'#$ } Odr<fvV,> 8+Abw)]s gB])@O%/ public void setSFilePath(String value) qo7jrY5G { 6r)B|~,OA sFilePath = value; yX%NFXD } < Y)A ez l0lvca=; /)<Xoa public String getSFileName() ~(}nd { uJU;C.LX return sFileName; +Uxtxl' } IHwoG(A~< q0KGI/5s4+ bKQ_{cR public void setSFileName(String value) BHpj_LB-P { 7_`_iymR sFileName = value; >6gduD!6I } lyw)4;wt\ gg@Ew4L& I[KAW" public int getNSplitter() r#(*x 2~, { 4[rX\?^e return nSplitter; Lklb } ,U.|+i{ <~
?LU^ 4F,RlKHBl public void setNSplitter(int nCount) ^%NjdZu DO { [<.dOe7| nSplitter = nCount; 8gJg7RxL } LCMn9I } p4@0Dz`Q ;CDa*(e y4,t=Gq7^ /* KouIzWf. **Utility.java H](TSt<Q" */ s]Z++Lh<{ package NetFox; V(M7d>N5G &IP`j~b 3bagL)'iz public class Utility { l} W">
yQ0 naM=oSB( -#
/'^O+% public Utility() =xr2-K)e { m6o o-muAr C,$7fW{? xG|lmYt76 } gW^0A)5 OySn[4`(i //线程睡眠 e?<$H\ public static void sleep(int nSecond) &XB1=b5 { {CQI*\O try{ lh-zE5; Thread.sleep(nSecond); nQ;M@k&9eV } ZmS
]4WM< catch(Exception e) bq z*90 { K
Vnz{cx` e.printStackTrace (); -;o0)DwZ } -932[+ } (S8hr,%n mV|Z5 =f //日志 CJt(c,!z public static void log(String sMsg) 6JD~G\$ { ^]9.$$GU\A System.err.println(sMsg); 95*=&d } t]+h. vlPViHF. g3c,x kaO public static void log(int sMsg) }VqCyJu&{ { `86})xz{ System.err.println(sMsg); wj\kx\+ } @VnK/5opS } rhC
x&L z`!f'I--! 0>yuB gh /* w%~Mg3| **TestMethod.java -NUA */ in2m/q? package NetFox; D YTC2 <1E5[9
q _@O.EksY3r public class TestMethod { 8i^d*:R .s>.O6(^% 4d%QJ7y public TestMethod() @|fT%Rwho< { ///xx/weblogic60b2_win.exe c
Sktm&SP try{ 5
&s<&h SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); *_eY +\j //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); X yD*V;.E SiteFileFetch fileFetch = new SiteFileFetch(bean); (4IH%Ez){ fileFetch.start(); `FmRoMW9+ } du&9mOrr catch(Exception e){e.printStackTrace ();} 6,(S}x
YDZ R!2E`^{Wl K*N8Vpz( } #4F0o@Z ]EEac $`_xP1bUT public static void main(String[] args) #{zF~/Qq { T26'b . new TestMethod(); v8\pOI}c } uOb}R } *u!l"0'\ 点击下载更多相关资料
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