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/* _)3C_G1! **SiteFileFetch.java &fkH\o7) */ j0Os]a package NetFox; 19oyoi" import java.io.*; aSHN*tP%y import java.net.*; [E2".F3
[W<j A4;~+L :M public class SiteFileFetch extends Thread { )2Y]A^ Y @KZW*-" EF=5[$
u SiteInfoBean siteInfoBean = null; //文件信息Bean 07ppq?,y long[] nStartPos; //开始位置 puEu)m^ long[] nEndPos; //结束位置 n}4q2x" FileSplitterFetch[] fileSplitterFetch; //子线程对象 9~K+h/ long nFileLength; //文件长度 6 vJS"+ < boolean bFirst = true; //是否第一次取文件 [+}0K{(O= boolean bStop = false; //停止标志 XJq]l6a: File tmpFile; //文件下载的临时信息 jgkY^l DataOutputStream output; //输出到文件的输出流 SVV-zz]3M mfDt_Iq //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) *Id[6Z public SiteFileFetch(SiteInfoBean bean) throws IOException RgM=g8}M { ~rAcT6# siteInfoBean = bean; V^}$f3\B //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 6bf!v tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ~ySsv if(tmpFile.exists ()) ZR{YpLFQ { j``Ku@/x0 bFirst = false; ~Q]::
read_nPos(); lC
d\nE8G } a^O>i#i else ^b= ; { lx?v
.:zl\ nStartPos = new long[bean.getNSplitter()]; c+whpQ=01 nEndPos = new long[bean.getNSplitter()]; [w+1<ou;j } UCTc$3 wg:\$_Og v9t'CMU sULsU t# } Q(BZg{ YNp-A.o
W@ Ou
f \%E< public void run() eOZ~p { 8N<mV^|} //获得文件长度 $!\L6;: //分割文件 n+vv
% //实例FileSplitterFetch AOTtAV_e //启动FileSplitterFetch线程 ,.<c|5R //等待子线程返回 BcQw-<veu try{ X %7l!
k[ if(bFirst) RYl\Q,# { 4 .(5m\s! nFileLength = getFileSize(); aH,NS
if(nFileLength == -1) %[ o($a$ { @;S)j!m` System.err.println("File Length is not known!"); q+w] Xs; } fM*aZc*Y else if(nFileLength == -2) N7;kWQH { W(.svJUgb. System.err.println("File is not access!"); dLR[<@E } FL0yRF5 else rK'O 85)eU { ("<4Ry.u for(int i=0;i<nStartPos.length;i++) Fa #5a'}I { D>-Pv-f/ nStartPos = (long)(i*(nFileLength/nStartPos.length)); vrvi]
Y8 } a5w E{K for(int i=0;i<nEndPos.length-1;i++) kpQN>XV# { OE}c$!@ nEndPos = nStartPos[i+1]; ,wyEo>>4) } wDBU+Z nEndPos[nEndPos.length-1] = nFileLength; m?;/H } Q7mikg=1- } ZA'0q -KqMSf&9 'loko#6 //启动子线程 /c7jL4oD fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; (^<skx> for(int i=0;i<nStartPos.length;i++) =#&+w[4?&. { N)KN!! fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), kn&BGYt siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), N[yS heT nStartPos,nEndPos,i); Qv8 =CnuOT Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); W{ZJ^QAq/ fileSplitterFetch.start(); )E6E} } ^Q!A4qOQ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &u(pBr8B siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 8Qkwg]X // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", OY!WEP$F-C nEndPos = " + nFileLength); JbXi|OS/ // fileSplitterFetch[nPos.length-1].start(); F C=N}5u 9*r l7 <DEu]-'> //等待子线程结束 u|Ng>lU //int count = 0; fvA167\ //是否结束while循环 \GGyz{i boolean breakWhile = false; W!* P ;9vY5CxzC i3$pqNe while(!bStop) @CC
6`D { Y{X%C\ write_nPos(); _) UnHp_^ Utility.sleep(500); un)PW&~E breakWhile = true; UGoB7TEfn h6;zAM} W"tGCnd for(int i=0;i<nStartPos.length;i++) m;>:mwU { &NI\<C7_Gw if(!fileSplitterFetch.bDownOver) d"lk"R { +zl[C breakWhile = false; g$qM}#s0} break; q3GkfgY } Zk31|dL } ~/2OK!M if(breakWhile) 5wv7]F< break; Y&$puiH-j gMU%.%p2 ZRFHs>0 //count++; 1_M}Dc+J //if(count>4) [4;G^{
bX // siteStop(); 6DC+8I< } =pnQ?2Og 1buO&q!vn YuoIhT System.err.println("文件下载结束!"); `9acR>00$ } <2OXXQ1 catch(Exception e){e.printStackTrace ();} o
ethO } RE08\gNIt [|(=15; C)%qs] //获得文件长度 s&\krW& public long getFileSize() Qm*X Wo { fC$@m_-KD int nFileLength = -1; ]q&NO(:kbq try{ lLU8eHf\ URL url = new URL(siteInfoBean.getSSiteURL()); 5>~D3?IAd HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ?Q"1zcX httpConnection.setRequestProperty("User-Agent","NetFox"); ?0lz!Nq'S 9H+Q/Q*-a Iq
0ew int responseCode=httpConnection.getResponseCode(); 1*trtb4F if(responseCode>=400) g3(LDqB'. { ^^*Ia'9 processErrorCode(responseCode); ZM[Z9/S8 return -2; //-2 represent access is error ciFqj3JS } r5NH*\Q }$(\,SzW Fj"/jdM String sHeader; pfFHuS~ |ZOdfr4uW ;f)AM}~^Q for(int i=1;;i++) (,cG+3r] { C3(h j //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); :Vw{ lB //Utility.log(in.readLine()); o3h>)4 sHeader=httpConnection.getHeaderFieldKey(i); Q2*
~9QkU if(sHeader!=null) \[ 4y { =uR3|U(.|u if(sHeader.equals("Content-Length")) (]zi; { -oB=7+g nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 4`")aM break; S,vdd7Y } rCb#E} } 4^:$|\?] else (ki= s+W- break; 0!tuUn } YoWXHg!U } /NxuNi;5 catch(IOException e){e.printStackTrace ();} "|V}[ 2 catch(Exception e){e.printStackTrace ();} 8O[l[5u& aS~~*UHW [*@
+ Utility.log(nFileLength); eDvh3Y<D 2HF`}H)H Z_[L5B]Gwd return nFileLength; !-ZY_ } |f(*R_R vb}c)w
dp? dEW= V"W //保存下载信息(文件指针位置) > }kZXeR| private void write_nPos() p8Z;QH* { #L57d try{ &2I8!Ia output = new DataOutputStream(new FileOutputStream(tmpFile)); =r3g:j/>q output.writeInt(nStartPos.length);
=y`-:j\ for(int i=0;i<nStartPos.length;i++) 6;;2e> e { :39arq // output.writeLong(nPos); vJS}_j]_@ output.writeLong(fileSplitterFetch.nStartPos); oe!4ng[ output.writeLong(fileSplitterFetch.nEndPos); A8Km8" } }c>vk output.close(); Hx!eCTO:* } 7U2B=]<e- catch(IOException e){e.printStackTrace ();} |I{3~+E h catch(Exception e){e.printStackTrace ();} {CNJlr@z } '%o^#gJ p 6?[SlPPE1 ,LDL%<7t //读取保存的下载信息(文件指针位置) @Bn4ZFB@ private void read_nPos() m;L3c(r. { 7xYz9r)w` try{ *kcc]*6@s DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 6~x a^3G: int nCount = input.readInt(); tD4-Llj6 nStartPos = new long[nCount]; I&<'A[vHl nEndPos = new long[nCount]; 1aUg({ for(int i=0;i<nStartPos.length;i++) b~@+6? { +@*>N;$ nStartPos = input.readLong(); ]'$:Y nEndPos = input.readLong(); 0G2Y_A&e** } Nbv b_ input.close(); J6"GHbsO } .tQ(q=# catch(IOException e){e.printStackTrace ();} COmu.'%* catch(Exception e){e.printStackTrace ();} ^YB2E* } JAT%s
%UC @AK&R~< @]p{%" $ private void processErrorCode(int nErrorCode) =K}T; c { PZlPC#E- System.err.println("Error Code : " + nErrorCode); bm4Bq>*=U } MU\Pggs #)]/wqPoW mIqm/5 //停止文件下载 '?g&);4)k- public void siteStop() I5`>XfO) { Wh~,?}laj bStop = true; 5)5yH bS for(int i=0;i<nStartPos.length;i++) 8si{|*;hL fileSplitterFetch.splitterStop(); -Q&@P3x S4-jF D)U t)rPXvx}! } 0WYu5| } TQ0ZBhd //负责部分文件的抓取 5HE5$S **FileSplitterFetch.java 69apTx */ rS8\Vf]F package NetFox; fNfa.0s .w'b%M -=5~-72~ import java.io.*; 6NHP/bj<1V import java.net.*; a'.7)f[g} \fuz`fK: 2)T;N`tNw public class FileSplitterFetch extends Thread { b?qV~Dgk` ]@#wR o>bi~(H String sURL; //File URL LsaX
HI/?b long nStartPos; //File Snippet Start Position :8==Bu long nEndPos; //File Snippet End Position >yHtGIHe- int nThreadID; //Thread's ID 5SmJ'zFO boolean bDownOver = false; //Downing is over *ZFF$0} boolean bStop = false; //Stop identical J9DI(` FileAccessI fileAccessI = null; //File Access interface {9.UeVz 3IB9-wG S8v?H|rm public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException p
.P#S { &m
GU this.sURL = sURL; x'..j5 this.nStartPos = nStart; x%HxM~& this.nEndPos = nEnd; ]<L~f~vU nThreadID = id; g j]8/~lr fileAccessI = new FileAccessI(sName,nStartPos);//定位 5\w*W6y } 67Qu<9}<- 78~/1- $5&~gHc, public void run() jb{9W7;RL { b{{ H@LTW while(nStartPos < nEndPos && !bStop) 56.JBBZZ { P1B=fgT >VQLC&u( svb7-.! try{ u86PTp+ URL url = new URL(sURL); r>TOJVT&] HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <>Dw8?O
httpConnection.setRequestProperty("User-Agent","NetFox"); Z
P6p>?DQ String sProperty = "bytes="+nStartPos+"-"; x(R;xB httpConnection.setRequestProperty("RANGE",sProperty); f?ibyoXL Utility.log(sProperty); 8oXp8CC qswC>Gi z@pa;_ InputStream input = httpConnection.getInputStream(); ZkQ6~cM //logResponseHead(httpConnection); 1s(]@gt !.q9:|oc R[S1<m; byte[] b = new byte[1024]; yXv@yn int nRead; yNn=r;FZQ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) EltCtfm` { ,d&3IhYhD nStartPos += fileAccessI.write(b,0,nRead); S<*IoZ?T //if(nThreadID == 1) ,Z _@]D@ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3S2Alx!6 } #7}M\\$M ZH8 w^} (_CvN=A Utility.log("Thread " + nThreadID + " is over!"); ^FBu|eAkE bDownOver = true; Kg2Du'WQ^ //nPos = fileAccessI.write (b,0,nRead); c00rq ~<K } vCSC: catch(Exception e){e.printStackTrace ();} 5U4V_*V } 9y;}B
y } NA'45}fQ NH}o`x/ _>kc: //打印回应的头信息 g,M-[o=Fk public void logResponseHead(HttpURLConnection con) d;wq@e { js"5{w& for(int i=1;;i++) )oz2V9X{ { &GJVFr~z String header=con.getHeaderFieldKey(i); F kf4R5Y? if(header!=null) d|7LCW+HW //responseHeaders.put(header,httpConnection.getHeaderField(header)); &FT`z"^ Utility.log(header+" : "+con.getHeaderField(header)); VP^Yf_ else Zf<T`'_d break; = >tkc/aa } b7I0R;Zj } J5HK1 !6RDq` {=mGXd`x?l public void splitterStop() i20y\V
os? { vt* bStop = true; ~ss6yQ$ } ruB D
^- ]&q<O0^' -WF((s;<# } CMOyK^(e CM++:Y vJ lqJ92vi6Q /* yt5<J-m **FileAccess.java eI2HTFyT *//文件访问(定位,写) 9X;*GC;d package NetFox; Ng*-Bw)p] import java.io.*; LD5`9- {"{]S12N \y(3b# public class FileAccessI implements Serializable{ 7(h@5 YW/V}C'> //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 3Wv^{|^ RandomAccessFile oSavedFile; n5.sx|bI? long nPos; xsJXf @ 6vE#$(n#a&
DwGM+)! public FileAccessI() throws IOException ;R#RdUFH { Rk#'^} this("",0); y2s(]#8 } j=M%*`@ BSgT
6K S\:+5} public FileAccessI(String sName,long nPos) throws IOException 1 Ga3[g { R5^6Kwu oSavedFile = new RandomAccessFile(sName,"rw"); E&y)`>Nq{ this.nPos = nPos; Xy=ETV% oSavedFile.seek(nPos); ``:[Jr& } 9wldd*r GPhhg l7^^MnkC public synchronized int write(byte[] b,int nStart,int nLen) B;e<.M)e { Q8m%mJz~] int n = -1; j8[U}~*^ try{ 2-8Dc4H]r oSavedFile.write(b,nStart,nLen); 0NZ'(qf~9 n = nLen; >uq0}HB$a } \OFmd!Cz catch(IOException e) zm5PlG { ,-E'059 e.printStackTrace (); Komdz/g } }s<;YC ?z l<"u -wV2
79^b return n; ov,s]g83 } h`N2M, xi "3NF%= z|%Pi J, } X5[t6q! {x,)OgK!{ 3Q=\W<Wu /* .9B@w+=6 **SiteInfoBean.java 0,DrVGa */ ^IuhHP package NetFox; a?r$E.W'& r2.w4RMFua klFS3G public class SiteInfoBean { sV{\IgH/x "D_:`@V( 59l9_yFJ private String sSiteURL; //Site's URL v:/!OvLe private String sFilePath; //Saved File's Path X coPkW private String sFileName; //Saved File's Name 2!B|w8ar private int nSplitter; //Count of Splited Downloading File Q}lCQK/g P<vU!`x%q @- |G_BZ public SiteInfoBean() t7x<=rW7u {//nSplitter的缺省值为5
a}FyJp //default value of nSplitter is 5 6#CswSpS this("","","",5); #vyf*jPr } cw
2!V@ 54>0Dv??H
O]=jI public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 1aRTvaGo { W&
0R/y7 sSiteURL= sURL; +O 7(
>a sFilePath = sPath; ;#v3C; sFileName = sName; +39uKOrZ this.nSplitter = nSpiltter; zM&ro,W :AztHf?X rY^uOrR>j* } w$f_z*/ HSG Ln906 H6 x public String getSSiteURL() T&pCLvkz { oydP}X return sSiteURL; =&UE67eK, } JnK<:]LcK ^" ?a)KC
{q8|/{; public void setSSiteURL(String value) :+jg311} { `&q+ f+z sSiteURL = value; {u1|`=; } Lr*PbjQDIY :K2
X~Ty $#D#ezvxe public String getSFilePath() ~"`e9Im { hjg1By( return sFilePath; .p e3L7g } Q34u>VkdQI gF)-Ci `f~bnL public void setSFilePath(String value) j`.&4.7+ { #
f-hI sFilePath = value; G2I%^.s } 3R%JmLM+R9 w(ZZTVW- R)Mkt8v public String getSFileName()
O[MFp { RNB&!NC
return sFileName; X(BxC<!D. } 61kSCu BI)C\D3[ C;JW\J~W public void setSFileName(String value) #bt f|\D { T>nH= sFileName = value; _dk[k@5W{' } gw,K*ph}q >^g2Tg: QEt"T7a[/ public int getNSplitter() (jU_lsG { UwS7B~ return nSplitter; Iga+8k } Y2l;NSWU 8o|C43Q_ ;AOLbmb)H4 public void setNSplitter(int nCount) =bD.5,F) { ya~;Of5 nSplitter = nCount; nsi?.c&0! } OjlX<y. } E%v0@ [nV BnB sv%E5@ /* 5<PNl~0 **Utility.java Sq,>^|v4&e */ #b428- package NetFox; 1ds4C:M+< 4pT^* MFa/%O_* public class Utility { zC)JOykI% oc,I,v l([aKm# public Utility() D
)`(b { &\6},JN aeN #<M&$< 9Xg7=(# } FvVC 2Z F5x*#/af //线程睡眠 4bL *7bA public static void sleep(int nSecond) *\'t$se+ { T$u'+*
Xx try{ xf;>o$oN0P Thread.sleep(nSecond); UJqh~s } IowXVdm@6 catch(Exception e) +=9iq3<yfS { <\$"U5"` e.printStackTrace (); 1K/ : } 1HNP@9ga } F!hjtIkPj #3_g8ni5X //日志 9VTAs:0D= public static void log(String sMsg) EQ^]W-gN { s/hWhaS< System.err.println(sMsg); l+2NA4s } P]^OSPRg !Q~>)$Cf^ b6k_u9m^E public static void log(int sMsg) @R`6jS_gK { D
ON.)F System.err.println(sMsg); E@k'uyIu } XTX/vbge3m } y{3+Un R3og]=uFzm AC
<2.i_ /* U{ 0~& **TestMethod.java a"YVr'| */ 9jf9u0 package NetFox; V]J"v#!{ D<FQVdP WynTU? public class TestMethod { .^=I&X/P u(1m#xr8$ dDl+ public TestMethod() 0|-}>>qb\ { ///xx/weblogic60b2_win.exe n[!QrEeR}, try{ 4t =Kt SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); {G vGV //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); lq53
xT SiteFileFetch fileFetch = new SiteFileFetch(bean); &D[M<7T fileFetch.start(); hY{4_ie=8 } Dx /w&v catch(Exception e){e.printStackTrace ();} ws`r\k]3J NvIg,@} yc]_ ?S>9 } p2l@6\m\ )vOBF5 +-;v+{ public static void main(String[] args) 5|eX@?QF58 { w)S 4Xi= new TestMethod(); dL4VcUS. } 0B9FPpx? : } 3O*iv{-& 点击下载更多相关资料
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