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/* L|]w3}ZT@ **SiteFileFetch.java >gX0Ij#G */ LyJTK1]# package NetFox; M`9orq< import java.io.*; %!ER @&1f& import java.net.*; Q.pEUDq/
wzHjEW zCBtD_@ public class SiteFileFetch extends Thread { t_dw}I W%cj39$ #q~3c;ec SiteInfoBean siteInfoBean = null; //文件信息Bean 1c<CEq:?e% long[] nStartPos; //开始位置 p0[,$$pM long[] nEndPos; //结束位置 6mI_Q2 FileSplitterFetch[] fileSplitterFetch; //子线程对象 .WL\:{G8; long nFileLength; //文件长度 e_>rJWI} boolean bFirst = true; //是否第一次取文件 .q_uJ_qu- boolean bStop = false; //停止标志 S1H47<)UF File tmpFile; //文件下载的临时信息 s{"`=dKT DataOutputStream output; //输出到文件的输出流 h0QYoDvbC L6[rvM|9_ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) D_yY0rRM public SiteFileFetch(SiteInfoBean bean) throws IOException e~t}z_>F { &m%Pr siteInfoBean = bean; 7/^TwNsv //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); @Q$/eL tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 7'{Yz if(tmpFile.exists ()) Ew?/@KAV\ { =XacG}_ bFirst = false; P[#WHbn read_nPos(); Zeme`/aBb } skR,M=F~ else Lilk8|?#W { &-8-xw#. nStartPos = new long[bean.getNSplitter()]; uwH)/BW)[ nEndPos = new long[bean.getNSplitter()]; r_g\_y7ua } 7uv/@(J"$ SVg@xu+ TN |{P ziLr }/tg } Hz3 S^o7 vYMbson} t5X^(@q4N public void run() G"U>fwFuK { U3_yEvZ //获得文件长度 a_pCjG89 //分割文件 +4:+qGAJ{ //实例FileSplitterFetch Z|Lh^G //启动FileSplitterFetch线程 hBfzU\*0H //等待子线程返回 H%NLL4&wu try{ G7_"^r%c9; if(bFirst) :`>+f.) { MR)KLM0 nFileLength = getFileSize(); )Py+jc. if(nFileLength == -1) }*}`)rj, { :WfB!4%! System.err.println("File Length is not known!"); u'~b<@wHB } l6`d48U else if(nFileLength == -2) y`B!6p
5j { YAC zznN System.err.println("File is not access!"); >nIcFm } !{]v='
else h[`Op#^x3 { yz2oS|0 ' for(int i=0;i<nStartPos.length;i++) 7].IT( { H`6Jq?\ nStartPos = (long)(i*(nFileLength/nStartPos.length)); AXU!-er$ } Zs$RKJ7 for(int i=0;i<nEndPos.length-1;i++) j=jrzG+` { GaK_9Eg-2 nEndPos = nStartPos[i+1]; #`#aSqGmc } }PIGj} F/ nEndPos[nEndPos.length-1] = nFileLength; qiKtR } )V$! } #PLB$$ ,md7.z]U~ kJ<Xq
//启动子线程 .vOpU4 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; HH~
du for(int i=0;i<nStartPos.length;i++) Uo[5V|>X6 { L^al1T fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @8M2'R\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), UVBw;V nStartPos,nEndPos,i); p|9ECdU>; Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *6x^w%=A fileSplitterFetch.start(); b5 C}K } >yT@?!/Q>' // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), yE|}
r siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); <,cIc]eX // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", m2<
* nEndPos = " + nFileLength); WWs[]zr // fileSplitterFetch[nPos.length-1].start(); h, 6S$,UI !e\R;bYM ZR q}g: //等待子线程结束 /
-qt} //int count = 0; UE`4$^qs //是否结束while循环 #z^1)7 boolean breakWhile = false; b;;Kxi:7$} ;YXr G -MW(={# while(!bStop) =jv$ 1 { yb.|7U?/x write_nPos(); iN/!k.ybW} Utility.sleep(500); *Qwhi&k breakWhile = true; `"=L :2Rci`lp NG W{Z~l for(int i=0;i<nStartPos.length;i++) V45Udwp^ { E?h2e~ ,] if(!fileSplitterFetch.bDownOver) Cv(N5mA2 { TNT"2FoBd breakWhile = false; H6\ x.J^, break; -5_xI)i } {2*l :' } 1;~ 1U9V if(breakWhile) 6V6g{6W,/ break; k|c0tvp Q;,3W+( yr
9)ga% //count++; Wu;|(2I //if(count>4) QZa#iL // siteStop(); ~+iJpW } QOy&!6 'CAukk| Rf0\CEc System.err.println("文件下载结束!"); DCzPm/#b } '2J6%Gg catch(Exception e){e.printStackTrace ();} +rpd0s49 } _@;3$eB 8=o5;]Cg ?CZD^>6 //获得文件长度 BW-P%:B1!R public long getFileSize() H;Qn?^ { WHLKf int nFileLength = -1; vA-p}]% try{ p#BvlS=D URL url = new URL(siteInfoBean.getSSiteURL()); s /q5o@b{ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); +9F#~{v`4a httpConnection.setRequestProperty("User-Agent","NetFox"); 0HuRFl Vg~
kpgB 3U.qN0] int responseCode=httpConnection.getResponseCode(); s1$#G!' if(responseCode>=400) =i>F^7)U1 { 2(J tD processErrorCode(responseCode); F1*rUsRKN return -2; //-2 represent access is error {u6fa>R&$ } ,(W98}nB I>o;
%} NWN )b&} String sHeader; XJ/kB8 _ rVX_
-mw\?\2{ for(int i=1;;i++) w}q@VVB% { oYErG], //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); }lpm Hvs //Utility.log(in.readLine()); Rj;e82%%N sHeader=httpConnection.getHeaderFieldKey(i); I/V#[K C if(sHeader!=null) TaJn2cC^ { cP=mJ1 if(sHeader.equals("Content-Length")) $uB(@Ft. { /G+gk0FW nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 4EbiCSo break; JP*mQzZL } c7!`d.{90 } dk`!UtNNRa else 8\
;G+ break; pv SFp-:_ } o xu9v/ } JlGD.!` catch(IOException e){e.printStackTrace ();} 3Dv koV catch(Exception e){e.printStackTrace ();} !sQ8,l0h bXL a~r4\ B F|FW Utility.log(nFileLength); &YKzK)@ ;FflEL<7Y iquGLwJ return nFileLength; yS3s5C{C } 7Q}@L1A9F, M=_CqK* "0)G|pZI //保存下载信息(文件指针位置) G_4P)G3H private void write_nPos() Nj8)HR { |T"q,i9% try{ ^BTNx2VHf output = new DataOutputStream(new FileOutputStream(tmpFile)); S`@*zQ output.writeInt(nStartPos.length); @Qozud\? for(int i=0;i<nStartPos.length;i++) a Z,Wa-k { #eyx // output.writeLong(nPos); Z@A 1+kUS output.writeLong(fileSplitterFetch.nStartPos); M'7x:Uw; output.writeLong(fileSplitterFetch.nEndPos); H9!*DA<W } jzMGRN/67 output.close(); kO4~N-& } k]5L\]>y catch(IOException e){e.printStackTrace ();} @$G
K<jl catch(Exception e){e.printStackTrace ();} H`@7o8oj1 } )\G#[Pc7 KrH;o)| 3$;v# P$%N //读取保存的下载信息(文件指针位置) vdzC2T private void read_nPos() f`J"A: { kICYPy try{ 8;3FTF DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); I =pd jD int nCount = input.readInt(); 1sA-BQL nStartPos = new long[nCount]; uGWk(qn nEndPos = new long[nCount];
ond/e&1 for(int i=0;i<nStartPos.length;i++) -E"o)1Pj6C { 5]+eLKXB nStartPos = input.readLong(); ?GZs5CnS nEndPos = input.readLong(); v}@6"\ } W>Kn*Dy8~ input.close(); o\[nGf C& } "H@AT$Ny( catch(IOException e){e.printStackTrace ();} n1h+`nsf catch(Exception e){e.printStackTrace ();} ly+7klQ;. } C?k4<B7V 6m&I_icM Gr?gHAT private void processErrorCode(int nErrorCode) 8nM]G4H.f { m`aUz}Y>c System.err.println("Error Code : " + nErrorCode); q 9^r2OO } F{Hy@7 %# #
bg< 2e&Zs%u //停止文件下载 d"a`?+(Q public void siteStop() V,}cDT> { $2 0*&4y^ bStop = true; a*`J]{3G for(int i=0;i<nStartPos.length;i++) :T2K\@ fileSplitterFetch.splitterStop(); FMiYZ1^r _35?z"0 '|.u*M,b } ~ nIZg5 } j43HSY7@ //负责部分文件的抓取 Gf>T{Q`,is **FileSplitterFetch.java =n!8>8d */ )`a R?_ package NetFox; HU'}c*d] Z1zC@z4sUj h fNBWN import java.io.*; BDA\9m^3 import java.net.*; F6Ixu_s va)\uXW.N Z|.. hZG public class FileSplitterFetch extends Thread { SU^/qF%8 4CqZvdC aOOY_S
E String sURL; //File URL ^H>vJT long nStartPos; //File Snippet Start Position . 2WZb_B long nEndPos; //File Snippet End Position /D~:Ufw int nThreadID; //Thread's ID RV~w+%f boolean bDownOver = false; //Downing is over U i;o/Z3 boolean bStop = false; //Stop identical %u#pl=k} FileAccessI fileAccessI = null; //File Access interface }
? 2w%1\TcB$ na~ r}77o public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException nt7ui*k { ^#%[ this.sURL = sURL; 8d]=
+n! this.nStartPos = nStart; X~x]VKr/ this.nEndPos = nEnd; J{91 t | nThreadID = id; phTZUmi fileAccessI = new FileAccessI(sName,nStartPos);//定位 +`ZcYLg)# } nBQG.3 5D'8 l@7 s)> ]'ii public void run() ?/O+5rjA { 1}N5WBp while(nStartPos < nEndPos && !bStop) ?x:\RNB/ { xv
/w % 0tA+11Iu dJ$}] try{ #fwG~Q( URL url = new URL(sURL); &iuc4"' HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _3`{wzMA httpConnection.setRequestProperty("User-Agent","NetFox"); U7Ps2~x3 String sProperty = "bytes="+nStartPos+"-"; ]+oPwp;il httpConnection.setRequestProperty("RANGE",sProperty); +* &!u=%G Utility.log(sProperty); 9nB:=`T9 z\v\T|C %H:!/'45 InputStream input = httpConnection.getInputStream(); QjPcfR\ //logResponseHead(httpConnection); P
/Js!e<\ @o8\`G H4)){\ byte[] b = new byte[1024]; K'y;j~`- int nRead; pbu 8Ib8z while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Iu%S><'+ { Rj-<tR{ nStartPos += fileAccessI.write(b,0,nRead); Zl]\sJ1" //if(nThreadID == 1) IF uz' // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ms<?BgCSz } D=e&"V a 5pz%DhjLo NoV2<m$ Utility.log("Thread " + nThreadID + " is over!"); \4mw>8wA bDownOver = true; 0,,x|g$TpT //nPos = fileAccessI.write (b,0,nRead); C^.:{ } UnGG% catch(Exception e){e.printStackTrace ();} $/6.4"j } Ig]Gg/1G } ,xNuc$8Jd J-hP4t&x HA>b'lqBM //打印回应的头信息 {3'z}q public void logResponseHead(HttpURLConnection con) *l^h;RSx { Lylw('zZ for(int i=1;;i++) uEH&]M>d_ { JZ'`.yK: String header=con.getHeaderFieldKey(i); Td}#o!4! if(header!=null) In5'(UHW: //responseHeaders.put(header,httpConnection.getHeaderField(header)); /wVrr%SN Utility.log(header+" : "+con.getHeaderField(header)); J)6f"{} & else "^yTH/m break; IA!( 'Ks } k~h'`( }
r1)Og nxw]B"Eg 3w#kvtDVm public void splitterStop() Jn-iIl { D^$Nn*i;U bStop = true; Y&'Bl$` } Ns?y)
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}hv>LL } PSNfh7g ?>LsIPa g`k_o<'JC /* +eg$Z]Lht **FileAccess.java _0<qS{RW *//文件访问(定位,写) FE,&_J" package NetFox; I6ffp!^}Y import java.io.*; TU&gj1 Ol"*(ea-TX bzz=8n public class FileAccessI implements Serializable{ t
5g@t0$ -L}crQl.'c //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 l1fP@| RandomAccessFile oSavedFile; :''^a long nPos; Zu951+&` RBd{1on sluR@[l public FileAccessI() throws IOException ,Y6Me+5B { .gh3" this("",0); TL lR"L5 } D7T(B=S6 (sSMH6iCif sS7r)HV&GI public FileAccessI(String sName,long nPos) throws IOException Q&S\?cKe { x>TH yY[sq oSavedFile = new RandomAccessFile(sName,"rw"); `VM@-;@w this.nPos = nPos; BuII|j oSavedFile.seek(nPos); Z<T%:F } ;& ny< gQ @=B'<&g$Xv H48`z'o public synchronized int write(byte[] b,int nStart,int nLen) P]hS0,sE<( { Q{F*%X int n = -1;
*(5y;1KU try{ 8DHohhN oSavedFile.write(b,nStart,nLen); `&xo;Vnc n = nLen; OLp;eb1g } 2YI#J.6]H catch(IOException e) 0 UdAF { \}[{q e.printStackTrace (); 7) aitDD } /<,LM8n x@/ N9* Vf<VKP[9K return n; ,5J-C!C } y8=p;7DY Wm! lWQu7 szW_cjS } /cM< wn2+4> |~p Ct2m l /* F/GfEMSE **SiteInfoBean.java #'m&<g, */ X-,scm package NetFox; aD)XxXwozm
L7oLV?k 1|/P[!u public class SiteInfoBean { U,Py+c6 "BSSA%u?c w;@DcX$] private String sSiteURL; //Site's URL ZuF"GNUC private String sFilePath; //Saved File's Path ]XX9.Xh=- private String sFileName; //Saved File's Name !}%,rtI private int nSplitter; //Count of Splited Downloading File v[4A_WjT *j9{+yO{ZE 6b&<5,=d: public SiteInfoBean() /HCd52 {//nSplitter的缺省值为5 a|aRUxa0" //default value of nSplitter is 5 ?S&pq? this("","","",5); f44b=,Lry5 } 5m2`$y-nb {c5%.<O $v|/*1S public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) I{>U 7i
5 { zdY+?s)p sSiteURL= sURL; 9e^HTUFbG sFilePath = sPath; `U:W (\L sFileName = sName; ch2Q k8 this.nSplitter = nSpiltter; 9nW/pv S<),
,( GMc{g } 7kDX_,i +%yVW f m|mY_t public String getSSiteURL() H"v3?g`S% { /JaCbT?*T return sSiteURL; )C>4?) } }~gBnq_DDU wk
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c,y public void setSSiteURL(String value) a`SQcNBf* { V?KACYd@O sSiteURL = value; h4@v.GI } N^,@s"g pUs:r0B {P'TtlEp public String getSFilePath() H8^U!"~E { v9Kx`{1L return sFilePath; CH
|A^!Zm } ?~G D^F i={ :6K?^ bj6-0` public void setSFilePath(String value) ce/Z[B+d { 8<cD+Jtj sFilePath = value; I%dFVt@ } FmU>q) e;LJdd }1EfyR public String getSFileName() P( z#Wk { Z#8O)GK return sFileName; gO
C5 } [8Zq
1tU;G +APf[ZpU ppv/A4Kv public void setSFileName(String value) 7"L`|O?8) { NzRpI5\. sFileName = value; F"7dN *7 } XS!mtd<q jI`1>>N&1 -#yLH public int getNSplitter() W'2a1E { etY/K0 return nSplitter; \k6Ho?PL } 4AI\'M"d =F>@z4[P- 7C7eXJ9q public void setNSplitter(int nCount) ?sb
Ob { fX)C8J^=G nSplitter = nCount; b>R/=tx } }Qjp,(ye } FB<#N+L\ b_Us%{ oH/6 /* a<CN2e_Z **Utility.java mp2J|!Lx */ ]ZkhQ% package NetFox; UL0%oJ# INQ0h `T R(dVE\u public class Utility { 11Kbj`sRZ !f~ =p \k?uh+xl public Utility()
y(M- { $Iuf(J-5[ & i,on6 PZn[Yb: } (<?6X9F:N QN=a{ //线程睡眠 `I$'Lp#5 public static void sleep(int nSecond) }kg?A oo { cP[3p: try{ z@E-pYV Thread.sleep(nSecond); !;'.mMO&% } ,fS}cpV catch(Exception e) }]w/`TF { [zp v3Uw e.printStackTrace (); 7.4Q } !,}W|(P) } -uZ bVd l?CUd7P(a //日志 Tjo
K]] public static void log(String sMsg) G#.(%, { =j[zMO System.err.println(sMsg); C2GF
N1i } rM6^pzxe b-e3i;T!}~ 0RY{y n3 public static void log(int sMsg) Skgvnmk[U { 9g3J{pKcZ System.err.println(sMsg); 2.)@u~^Q
} ^p#f B4z } 'LZF^m _<< uSSnr#i^j aVv$k /* d#:&Uw **TestMethod.java 6x KbK1W */ 0raVC=[ package NetFox; SX)giQLU l,Un7]* XWvT(+J public class TestMethod { KE\p|X i MCHRNhb9 2 g"_*[ public TestMethod() 4HlOv%8 { ///xx/weblogic60b2_win.exe P<b.;Oz__- try{ Dt,b\6 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 1Sox@Ko //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); BcaMeb-Z SiteFileFetch fileFetch = new SiteFileFetch(bean); t1p} fileFetch.start(); )&di
c6r } Xv3u}nPMq catch(Exception e){e.printStackTrace ();} !xoN%5! .$b]rx7$~ $Z)Dvy| } dsP|j(y _+0l+a*D REnd#
V2x public static void main(String[] args) Z;shFMu { iorKS+w" new TestMethod(); f!;i$Oif } >E^?<}E~. } 0S@O]k) 点击下载更多相关资料
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