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/* Hmt^h(*/2 **SiteFileFetch.java .IBp\7W!?E */ "5R~(+~<@ package NetFox; Dl(3wgA import java.io.*; S{pXs&4O import java.net.*; Z;Ez"t&U J]lrS lGwl1,= public class SiteFileFetch extends Thread { Un`^jw#_ ('wY9kvL& x-OA([;/ SiteInfoBean siteInfoBean = null; //文件信息Bean 4#x5MM long[] nStartPos; //开始位置 wO ?+Nh long[] nEndPos; //结束位置 Q_* "SRz FileSplitterFetch[] fileSplitterFetch; //子线程对象 mMsTyM-f long nFileLength; //文件长度 _XJ2fA ) boolean bFirst = true; //是否第一次取文件 JlMT<;7\ boolean bStop = false; //停止标志 O5$/55PI File tmpFile; //文件下载的临时信息 +fvaUV_- DataOutputStream output; //输出到文件的输出流 g?-lk5 bM8If" //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) u6>?AW1~ public SiteFileFetch(SiteInfoBean bean) throws IOException ^O^l(e!3 { C<KrMRWh^ siteInfoBean = bean; 9Gv[8'I //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); pw7[y^[Qg tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); GKN%Tv:D_ if(tmpFile.exists ())
NR;1z { 64hk2a8 bFirst = false; w"R:\@ F read_nPos(); L!=QR8?@E } 4:U?u else zN
[2YJ$ { qUly\b 47 nStartPos = new long[bean.getNSplitter()]; HttiX/2~ nEndPos = new long[bean.getNSplitter()]; )/z@vY } Yo[;W
vu jQ:OKh<Y N^3N[lD{ xQUu|gtL4 } ;[fw]P n BYMi6wts kYjGj,m" public void run() W;,C_ { , T8>}U( //获得文件长度 `nZ )> //分割文件 e8GEoD //实例FileSplitterFetch GhIKvX_N //启动FileSplitterFetch线程 a+%6B_|\ //等待子线程返回 z}MP)|aH: try{ !0vG|C;' if(bFirst) pLLGus+W { ~NpA".PB nFileLength = getFileSize(); s]f6/x/~ if(nFileLength == -1) ~2gG(1%At9 { IVAmV!.z System.err.println("File Length is not known!"); Q+W1lv8R } JYW)uJ else if(nFileLength == -2) 8n*.).33 { Fd[zDz System.err.println("File is not access!"); 7r~~Y%=C| } t+1 %RyKFB else {z")7g ]l { fR*q?, for(int i=0;i<nStartPos.length;i++) [tH-D$V { @_"9D y Y% nStartPos = (long)(i*(nFileLength/nStartPos.length)); \(Pohw WWo } /c$\X<b); for(int i=0;i<nEndPos.length-1;i++) dDD<E?TjD { 'Vr$MaO nEndPos = nStartPos[i+1]; LFZiPu } _6k*'aT~FK nEndPos[nEndPos.length-1] = nFileLength; Maqf[
Vky } e|rg;`AW } 4:sjH.u< $XU5??8 .p ls! //启动子线程 NB7Y{)
w fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 6MG9a>= for(int i=0;i<nStartPos.length;i++) +@Ad1fJi { z*a8sr fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), WA$>pG5s siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), `T2$4 >! nStartPos,nEndPos,i); e2+BWKaU Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); e* fileSplitterFetch.start(); lg}HGG } ;@nFVy>U // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9ktEm|F3 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); v6GsoQmA // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", '&FjW-`"
G nEndPos = " + nFileLength); BYM3jXWi0v // fileSplitterFetch[nPos.length-1].start(); u0RS)&
`Ci4YDaz;k (5<^p& //等待子线程结束 phYDs9-K //int count = 0; &W6^6=E{g //是否结束while循环 8CC/ BOe boolean breakWhile = false; 3p*-tBOO B(DrY1ztj 8seBT;S while(!bStop) #g5^SR|qE { UkfB^hA write_nPos(); 70B)|<$ Utility.sleep(500); {C^@Q"I breakWhile = true; e#/kNHl l+wc'=] 6e25V4e?I for(int i=0;i<nStartPos.length;i++) j}+5vB|0 { -Z^4L if(!fileSplitterFetch.bDownOver) 7@PIM5h { Sg]
J7;] breakWhile = false; Dz_eB"} break; eX2<}'W< } q6wr=OWD } (D{Ys'{q if(breakWhile) @("}]/O
V: break; \m@Y WO?L q9dLHi<1 hxC!+ArVe //count++; \h3e-) //if(count>4) ACV ek // siteStop(); mEQ!-p } mYNEz
@ d
`j?7Z ., :uZyG System.err.println("文件下载结束!"); @ERu>nSP } 3D)b*fPc catch(Exception e){e.printStackTrace ();} `ycU-m== } 1.R
kIB mjEs5XCC" bj"z8 kP //获得文件长度 G5{Ot>;*% public long getFileSize() PaVO"y]C { 4VIg>EL* int nFileLength = -1; B50 [O! try{ Yb=6C3l@ URL url = new URL(siteInfoBean.getSSiteURL()); %{STz HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,w&:_n httpConnection.setRequestProperty("User-Agent","NetFox"); z };ZxN ?En7_X{C? >IR$e=5$ int responseCode=httpConnection.getResponseCode(); .^XHuN& if(responseCode>=400) $o^e:Y,
a { 0RyFv+ processErrorCode(responseCode); M^ 5e~y return -2; //-2 represent access is error r] t )x* } M}!A]@ 5
R*lVUix <*YO~S(R String sHeader; {Bvm'lq` e d;"bb :l~E E! for(int i=1;;i++) y`b\;kd { ]
C,1%( //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); a9[< ^ //Utility.log(in.readLine()); 6+8mV8{-8 sHeader=httpConnection.getHeaderFieldKey(i); y[:q"BB3 if(sHeader!=null) hNO)~rt { Qcgu`]7} if(sHeader.equals("Content-Length")) aFG3tuaKrQ { Q>IH``1*e nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); G{A)H_o* break; B+Q+0tw*i } PEy/k. } ja75c~RUw else k ZK//YN# break; m %Y(O } a)S(p1BGg } Vr\Q`H. catch(IOException e){e.printStackTrace ();} .M+v?Ad catch(Exception e){e.printStackTrace ();} `r]TA]DR fqX~xp &gWiu9WbS Utility.log(nFileLength); fkBLrw ,|iy1yg( 7(@(Hm return nFileLength; hpjUkGm5 } `x4E;Wjv ;ct)H*
y #Jv43L H //保存下载信息(文件指针位置) 4
iKR{P6 private void write_nPos() (h|ch# { wlL8X7+: try{ bHJoEYY^ output = new DataOutputStream(new FileOutputStream(tmpFile)); vQy$[D* output.writeInt(nStartPos.length); \KNdZC?V2 for(int i=0;i<nStartPos.length;i++) 9H[/T j-; { ~BtKd* ~* // output.writeLong(nPos); &
L3UlL output.writeLong(fileSplitterFetch.nStartPos); :Dt\:`(r' output.writeLong(fileSplitterFetch.nEndPos); &8wa ih(| } [='p!7z output.close(); 33,;iE } /4^G34 catch(IOException e){e.printStackTrace ();} ) (+)Q'* catch(Exception e){e.printStackTrace ();} joY1(Y } +!Q!m 3/I :;q>31:h s><IykIi //读取保存的下载信息(文件指针位置) PK_Fx';ke^ private void read_nPos() ^J0zXe -d { 90?,-6 try{ m,=)qex DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 9ptZVv=O int nCount = input.readInt(); ~~U< nStartPos = new long[nCount]; C(xqvK~p nEndPos = new long[nCount]; 1Jl{1;c for(int i=0;i<nStartPos.length;i++) g%X &f_@ { yB=C5-\F nStartPos = input.readLong();
!8we8)7 nEndPos = input.readLong(); 32s5-.{c/f } IvFR <n input.close(); c%jsu" } W0C{~|e catch(IOException e){e.printStackTrace ();} ]c5DOv& catch(Exception e){e.printStackTrace ();} V;H
d)v(j } W^003*m~~K p
"/(>8 wH+FFXGJs private void processErrorCode(int nErrorCode) 7[4_+Q:} { /tG 5!l System.err.println("Error Code : " + nErrorCode); j p! } 4[2=L9MIo~ 7U&5^s
)J u82h6s<'W //停止文件下载 txj wZ_p public void siteStop() Po'-z<}wS { oSN8Xn*qr bStop = true; Q^*G`&w, for(int i=0;i<nStartPos.length;i++) TNyK@~#m fileSplitterFetch.splitterStop(); D8)O4bh UCe,2v% K5 5} Wi } r hiS } Y0 @'za^y //负责部分文件的抓取 m5X3{[a: **FileSplitterFetch.java `l+ >iM */ \d `dV0X package NetFox; JX2mTQ AF6d#Klog $?[1#% import java.io.*; BO?mQu~ import java.net.*; N|UBaPS|o nw~/~eM5= [SCw<<l< public class FileSplitterFetch extends Thread { CWE Ejl 8]sTX9 LN@lrC7X String sURL; //File URL di8W2cwz long nStartPos; //File Snippet Start Position -@YVe:$%b long nEndPos; //File Snippet End Position ^^n+ int nThreadID; //Thread's ID Zx}NFcn boolean bDownOver = false; //Downing is over M,.b`1-w boolean bStop = false; //Stop identical rFKo E% FileAccessI fileAccessI = null; //File Access interface ?l6>6a7 `V]egdO @/CRIei public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException g2+l@$W { 2>!_B\%) H this.sURL = sURL; e*Uz#w: this.nStartPos = nStart; ~bQFk?ZN+ this.nEndPos = nEnd; y3&Tv nThreadID = id; :'5G_4y)h fileAccessI = new FileAccessI(sName,nStartPos);//定位 &/B2)l6a } hg[l{)Q Fv?R\`52u DePV,. public void run() LL|_c4$Ky { AzHIp^ while(nStartPos < nEndPos && !bStop) %00k1*$ { >$7wA9YhL 844tXMtPB\ iYO
wB'z try{ }4bB7,j URL url = new URL(sURL); ^ 4u3Q HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); .jU|gf:x httpConnection.setRequestProperty("User-Agent","NetFox"); '+o:,6 String sProperty = "bytes="+nStartPos+"-"; , aRJ!AZ httpConnection.setRequestProperty("RANGE",sProperty); AIvL#12 Utility.log(sProperty); GNhtnB JLy)}8I w\"n!^ms InputStream input = httpConnection.getInputStream(); TEaD-mY3 //logResponseHead(httpConnection); GibggOj2Q, `-72>F ;T &rl]$Mtt byte[] b = new byte[1024]; $I}Hk^X int nRead; )8 "EI-/. while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) W2r6jm! { :$SRG^7md nStartPos += fileAccessI.write(b,0,nRead); ch5`fm //if(nThreadID == 1) ?)Czl4J // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %=NM_5a}] } egxJ3. }5o~R~H %!ER @&1f& Utility.log("Thread " + nThreadID + " is over!"); Q.pEUDq/ bDownOver = true;
wzHjEW //nPos = fileAccessI.write (b,0,nRead); zCBtD_@ } 5 `{|[J_[ catch(Exception e){e.printStackTrace ();} 1K?
&
J2 } 5C Y@R } }%o+1 <= j,|1y5f 1^x2WlUm4 //打印回应的头信息 4i[v
ew public void logResponseHead(HttpURLConnection con) NgE&KPj\ { !OuTXa,IH for(int i=1;;i++) \pewbu5^ { u/!mN2{Rd String header=con.getHeaderFieldKey(i); ;G%wc! if(header!=null) .UT,lqEkv //responseHeaders.put(header,httpConnection.getHeaderField(header)); we:5gK& Utility.log(header+" : "+con.getHeaderField(header)); u'$yYzBE else \4\\575zp' break; K+h9bI/Sf } ~q8V<@? } r3c\;Ra7 "x:)$@ |L.~Amd public void splitterStop() !ulLGmUn { 0'V- bStop = true; SQ^^1.V&/Y } G>q{~HE1 ^O$[Y9~*
S0Bl?XsD_ } d5sGkR`( 4ye`;hXy CQ8o9A/ /* (1elF) **FileAccess.java @KW+?maW *//文件访问(定位,写) Ghq'k:K, package NetFox; S\v&{ import java.io.*; :d%
-,v y1\^v_.^ F'5d\ v public class FileAccessI implements Serializable{ ]:E! i^C`Z UwL"%0u //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 @8<uAu% RandomAccessFile oSavedFile; y`B!6p
5j long nPos; YAC zznN Z;~E+dXC 0m+5Zn public FileAccessI() throws IOException L$TKO,T { 0ZID
@^ this("",0); C(t6;&H } R 6yvpH $NGtxZp *Xtc`XH public FileAccessI(String sName,long nPos) throws IOException S~a:1
_Wl { _[OEE<( oSavedFile = new RandomAccessFile(sName,"rw"); B> "r -O this.nPos = nPos; #`#aSqGmc oSavedFile.seek(nPos); $L#Z?76v } 9CU6o:'fW ETWmeMN ,?~UpsUx public synchronized int write(byte[] b,int nStart,int nLen) }b]y
0" { sO4}kxZ int n = -1; jVFRq T% try{ Hj4w
i| oSavedFile.write(b,nStart,nLen); 1-]x n = nLen; Q0"F> %Cn } 8.Own=G? catch(IOException e) I`$I0 { *~<]|H5~ e.printStackTrace (); |3T|F3uEX
} K9N0kBJ0< 4FHX#` *sIG& return n; cA*X$j6 } ,Qi|g'a qT>&
v_< .'2gJ"?, } dt0E0i /2\=sTd QGz3id6 /* -^xKG'uth **SiteInfoBean.java NF)\">Ye */ 19-yM`O package NetFox; Ty4%du6?d ;7`um f!8m public class SiteInfoBean { f}ij=Y9 [#rdfN'?U
~Ow23N private String sSiteURL; //Site's URL "`gZy)E private String sFilePath; //Saved File's Path "JLhOTPaHf private String sFileName; //Saved File's Name |e;z"-3 private int nSplitter; //Count of Splited Downloading File M^Ay,jK! jc~*#\N 2c`=S5 public SiteInfoBean() VJtTbt;> {//nSplitter的缺省值为5 )I-?zyL //default value of nSplitter is 5 I;.E}k this("","","",5); I4X+'fW, } rbZ6V : -L50kk>h .,K?\WZ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) `k%#0E*H { s!fY^3 sSiteURL= sURL; l=?y=2+ sFilePath = sPath; o^"3C1j sFileName = sName; ggsi`Z{j? this.nSplitter = nSpiltter; QT l._j@ (?3\.tQ}} D!$ =oK } `ur9KP4Dq [qMO7enu# $AhX@|?z public String getSSiteURL()
:ItW| { D!T4k]^ return sSiteURL; Qbpl$L } x[~OVG0M* y-q?pqt Qr-J-2s ?B public void setSSiteURL(String value) *vE C,) { K2K6 sSiteURL = value; A.x}%v,E } [ .uaO ,fJ(.KI0 yB{o_1tc public String getSFilePath() 'wnY>hN { @,`=~_J return sFilePath; Z?aR9OTP
} LA %al @ n(xlad ZboJszNb; public void setSFilePath(String value) u0hbM9U> { GZVl384@ sFilePath = value; Xq!tXJ) } Wc>)/y5$ "UnSZ[;t }V,M0b> public String getSFileName() na:^7:I { wSF#;lqd return sFileName; CyDf[C)= } #R4KBXN m1i$>9, Z M, ^R?e public void setSFileName(String value) )K3
vzX { TN aff sFileName = value; |L{dQ)-'l } k0Yixa 6YGr"Kj & 0-f- public int getNSplitter() %GiO1:t { K -1~K return nSplitter; :.df( 1(RL } +%9Y7qol t3JPxg]0k' ^V]DY!@k3_ public void setNSplitter(int nCount) *sVxjZvV { M=_CqK* nSplitter = nCount; j&GKp t } rqJj!{<B } wGX"R 5 c&(, Utp\}0GZY /* *3Z#r **Utility.java y36aoKH */ J"|$V# package NetFox; @sO.g_yM lf#six E|3aiC,5 public class Utility { kcUt!PL zZiVBUmE< ^
?9
~R" public Utility() sH: &OaA { `" Pd$jW SX;IUvVE5 KrH;o)| } 3$;v# P$%N vdzC2T //线程睡眠 Q NEaj\ public static void sleep(int nSecond) O v6=|]cW { 3i~{x[Jc try{ q[K)bg{HB Thread.sleep(nSecond); Fj4:_(%nG } J1t?Qj;f3 catch(Exception e) i+3b)xtW7 { }clNXtN e.printStackTrace (); WLH2B1_): } Ta$<#wb } 6}2Lt[>O i%w'Cs0y //日志 9x<
8(]\ public static void log(String sMsg) tWIhbt { 5GP'cE System.err.println(sMsg); ccAEN } k2;yl_7 J(60eTwQ *L_wRhhk public static void log(int sMsg) u5[Wr : { F!8425oAw System.err.println(sMsg); (aLnbJeJ } _qfdk@@g } ~8K~@e $./ j!pxG5% 1'U-n{fD /*
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**TestMethod.java r@aFB@ */ e2v,#3Q\ package NetFox; .H"gH-I Lm/^ 8V+ DlP=R public class TestMethod { :tMWy
m ~mU#u\r(* e^fjla5 public TestMethod() m6}"g[nN { ///xx/weblogic60b2_win.exe E#OKeMK try{ %* 8QLI SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ):\L#>:w //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); $: -Ptm@ SiteFileFetch fileFetch = new SiteFileFetch(bean); fO+;%B fileFetch.start(); &q+ %OPV } l6RJour catch(Exception e){e.printStackTrace ();} v,s]:9f`\> 4YJs4CB ;a|A1DmZ } #~Q0s)Ze Ty5\zxC| w t}a`hxu public static void main(String[] args) %u#pl=k} { }
? new TestMethod(); !&X}?NK } /3fo=7G6 } $W)FpN;CW/ 点击下载更多相关资料
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