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/* O/9%"m:i **SiteFileFetch.java !lQ#sL` */ .k# N7[q= package NetFox; 6}VUD
-}B import java.io.*; 0Jm]f/iZ import java.net.*; CS~=Z>6EjA [c&2i`C {l0,T0 public class SiteFileFetch extends Thread { k~0#'I9 u^`eKak"l 'RDWU7c9] SiteInfoBean siteInfoBean = null; //文件信息Bean *'Z-OY<V long[] nStartPos; //开始位置 lZ}izl long[] nEndPos; //结束位置 (bg}an FileSplitterFetch[] fileSplitterFetch; //子线程对象 w) =eMdj\o long nFileLength; //文件长度 ixOEdQ boolean bFirst = true; //是否第一次取文件 r#LnDseW boolean bStop = false; //停止标志 >$2E1HW. File tmpFile; //文件下载的临时信息 =y?#^ DataOutputStream output; //输出到文件的输出流 'n~fR]h} %lXbCE:[ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 3H1Pp*PH public SiteFileFetch(SiteInfoBean bean) throws IOException qovQ9O { 4Z*|Dsw siteInfoBean = bean; OZG0AX+=# //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); y&7YJx tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); pp(H
PKs=} if(tmpFile.exists ()) FI\IY
R { 2bWUa~%B bFirst = false; hO#HvW read_nPos(); &kb\,mQ } #-,g&)`] else d{W}p~UbH { >W'j9+Va nStartPos = new long[bean.getNSplitter()]; d& hD[v nEndPos = new long[bean.getNSplitter()]; y
$:yz; } ~NxEc8Y x7f:F. :JR<SFjm $)Wb#B } Z)NrhJC \[cH/{nt 3:UA<&=s public void run() |B
eA== { \4aKLr //获得文件长度 r]9 e^ //分割文件 *.8JP //实例FileSplitterFetch eO'xkm //启动FileSplitterFetch线程 d4J<, //等待子线程返回 i (0hvV>' try{ 2\5cjdy if(bFirst) Ss 2$n { r
^MiRa nFileLength = getFileSize(); >&1um5K if(nFileLength == -1) x:qr \Rz { Pw= 3PvkL System.err.println("File Length is not known!"); SBX|Bcyk* } }C_|gd else if(nFileLength == -2) LP ,9<&"< { O] H=s System.err.println("File is not access!"); @HvScg*Y } rCE;'? Y else .liyC~YW { WO@H* for(int i=0;i<nStartPos.length;i++) !y%+GwoW { ;b1wk^,Hw~ nStartPos = (long)(i*(nFileLength/nStartPos.length)); JR)/c6j } 8)Zk24:])_ for(int i=0;i<nEndPos.length-1;i++) XCm\z9F { F@1d%c nEndPos = nStartPos[i+1]; /VO^5Dnb } LEK/mCL nEndPos[nEndPos.length-1] = nFileLength; U@?6*,b(. } qOi5WX6F/ } &n|*uLn
ZBJ3 VK 's.~$ //启动子线程 `L\)ahM fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; _88QgThb for(int i=0;i<nStartPos.length;i++) {5-zyE { 4uUs7T fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -\Z `z}D siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), jTfi@5aPY nStartPos,nEndPos,i); HIGNRm Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 0[)VO[ fileSplitterFetch.start(); x@m<Ym- } E:w:4[neh // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), *,lh:
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); VNj@5s // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", sofu nEndPos = " + nFileLength); Yj|]Uff8O // fileSplitterFetch[nPos.length-1].start(); /C$
xH@bb K%gP5>y*9> Q0~j$Jc //等待子线程结束 V7C1FV2 //int count = 0; %hINpZMr //是否结束while循环 Jq
.L:>x
boolean breakWhile = false; j[XYj6*d AIh*1>2Xn [bjN
f2 while(!bStop) RtC'v";6 { +.@c{5J< write_nPos(); bRPO:lAy Utility.sleep(500); @B`Md3$7 breakWhile = true; tg 85: Oq+E6"<y;? 8Kk\*8 < for(int i=0;i<nStartPos.length;i++) }Hy ~i { jPk
c3dG
+ if(!fileSplitterFetch.bDownOver) DMZ`Sx { mp\%M
1< breakWhile = false; >]&X ^V%Q# break; ll<mE, } Ld(NhB'7 } )a cV-+{ if(breakWhile) jGD%r~lN break; SRL-Z&M V1utUGJV Bo
r7] # //count++; #?&0D>E?k //if(count>4) #3MKH8k&~ // siteStop(); 'Kz9ygZy } !/hsJ9 q`Q}yE>9 )q3"t2- System.err.println("文件下载结束!"); k^An97J } E5UcZ7 catch(Exception e){e.printStackTrace ();} Gt~JA0+C)7 } s@!$='| R1%y]]*-P *YvRNHP //获得文件长度 ,W*H6fw+ public long getFileSize() ({[,$dEa; { S_Z`so} int nFileLength = -1; {gU&%j try{ ZK!A#Jm{ URL url = new URL(siteInfoBean.getSSiteURL()); 6E^~n HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); MYdx .NZT httpConnection.setRequestProperty("User-Agent","NetFox"); &mkpJF/ (E!!pz h-mTj3p-K int responseCode=httpConnection.getResponseCode(); 97LpY_sU if(responseCode>=400) PW)aLycPK { ngUHkpYS5 processErrorCode(responseCode); *%A}x return -2; //-2 represent access is error |4C^$ } :6Pad J?Iq9f P(ZQDTbM
: String sHeader; PC/!9s0W u$\a3yi s<7XxQ for(int i=1;;i++) &u8z5pls8 { geGeZ5+B //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); /[pqI0sf<A //Utility.log(in.readLine()); U^_D|$6 sHeader=httpConnection.getHeaderFieldKey(i); lLiQ ;@ if(sHeader!=null) eOY^$#Y { wda';@y5( if(sHeader.equals("Content-Length")) LmLGki$w { ];FtS>\x nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); m*n5zi|O break; g9>~HF$U } -%m3-xZA } wNDbHR else Eipp~GD break; nhH;?D3 } qX6D1X1_ } p'Bm8=AwD catch(IOException e){e.printStackTrace ();} k<Sl1vK catch(Exception e){e.printStackTrace ();} (Hp' B))2 yyP-=Lhmo= \b8\Ug~t Utility.log(nFileLength); 1r9 f[j~ ..qd,9H %oof}=MxCL return nFileLength; $G!R,eQ } ]<trA$ 0 s&tE_ :b/J\ //保存下载信息(文件指针位置) aMwB>bt private void write_nPos() Vfs$VY2. { < bUe/m try{ :T@r*7hNT output = new DataOutputStream(new FileOutputStream(tmpFile)); (03pJV&K output.writeInt(nStartPos.length); Mr3-q for(int i=0;i<nStartPos.length;i++) qx)?buAij { %&+59vq // output.writeLong(nPos); b{cU<;G)y. output.writeLong(fileSplitterFetch.nStartPos); E^V| output.writeLong(fileSplitterFetch.nEndPos); k*Nr!Z!} } jAhP>
t: output.close(); Y`ihi,s`H } gK1g]Tc @G catch(IOException e){e.printStackTrace ();} EbK0j? catch(Exception e){e.printStackTrace ();} )u} Q:`9 } x\\7G^$<h F4C!CUI M0'v&g //读取保存的下载信息(文件指针位置) u=NG6G private void read_nPos() T0QvnIaP { F:g= i}7 try{ E3l*8F%<3 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); D d $qQ int nCount = input.readInt(); F jrINxL7^ nStartPos = new long[nCount]; @F5f"8!.\ nEndPos = new long[nCount]; x_<qzlQt for(int i=0;i<nStartPos.length;i++) i'HQQWd { 4{na+M nStartPos = input.readLong(); dF@)M nEndPos = input.readLong(); L36Yx7gT< } -K%5(Eg input.close(); #bnb': f } Ol@_(U catch(IOException e){e.printStackTrace ();} 2W<n5o catch(Exception e){e.printStackTrace ();} blt'={Z?.x } ERMa# L q!lP"J 9<1F[SS<s9 private void processErrorCode(int nErrorCode) 9U_ks[Qa { E1V^}dn System.err.println("Error Code : " + nErrorCode); Qyh/ed/ } d IB }_L ~}9PuYaD@ \Ad7
G i~ //停止文件下载 RYR-K^;R public void siteStop() V2 d,ksKwn { Fwg^(;bL bStop = true; 'S4)?Z for(int i=0;i<nStartPos.length;i++) :QQlI fileSplitterFetch.splitterStop(); '?5j[:QY@ c-1q2y L=!of{4Z(} } *|:Q%xr- } 7{kP}? //负责部分文件的抓取 uXZg1F) **FileSplitterFetch.java !kuX,*}q */ q3e8#R)l package NetFox; :*i f )q~DTR^z- Yg|lq9gD import java.io.*; ,I.WX,OR import java.net.*; a>mMvc" @J'YV{] %ati7{2! public class FileSplitterFetch extends Thread { .)XP\m\ ?}p:J{ Q\Kx"Y3i String sURL; //File URL u eb-2[= long nStartPos; //File Snippet Start Position vXj < long nEndPos; //File Snippet End Position <X7\z int nThreadID; //Thread's ID s Kicn5 boolean bDownOver = false; //Downing is over dR^"X3$ boolean bStop = false; //Stop identical %D}H|*IPu FileAccessI fileAccessI = null; //File Access interface E; Y;r" b-5y9 K bJ /5|E? public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException K{ fsn4rk { !BIOY!M this.sURL = sURL; Qeq5 gN] this.nStartPos = nStart; ShOX<Fb& this.nEndPos = nEnd; eet Q}] nThreadID = id; C#pZw[ fileAccessI = new FileAccessI(sName,nStartPos);//定位 RIn9(r } VR{+f7:} 7 Cqcb>\X ecJ6 public void run() F/c$v { Mj=$y?d ] while(nStartPos < nEndPos && !bStop) `Nh" { eJCjJ) E.bi05l sM[I4.A3 try{ 13'vH]S$M URL url = new URL(sURL); u6u=2 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q^Ql\ httpConnection.setRequestProperty("User-Agent","NetFox"); V%0I%\0Y String sProperty = "bytes="+nStartPos+"-"; ykg# {9+ httpConnection.setRequestProperty("RANGE",sProperty); /t<@"BoV Utility.log(sProperty); RkEN
,xWE 2S3lsp5! g9fq5E<G InputStream input = httpConnection.getInputStream(); 5+Mdh` //logResponseHead(httpConnection); 3-n19[zk L)QE`24 ikB Yd
}5 byte[] b = new byte[1024]; lfsqC};#\ int nRead; <|Yj%f while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 0H_!Kg { c?2MBtnu nStartPos += fileAccessI.write(b,0,nRead); Q:C$&-$ //if(nThreadID == 1) :p&!RI(l // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qB]i6* } |WryBzZ>on nP~({:l8X ;^Sr"v6r>u Utility.log("Thread " + nThreadID + " is over!"); !}+tdT(y bDownOver = true; -m=
8&B //nPos = fileAccessI.write (b,0,nRead); )py{\r9X } ^I6^g catch(Exception e){e.printStackTrace ();} c)md }
>YtdA } dBV7Te4L 6pOx'u>h+ g$:Xuw1 //打印回应的头信息 @XD+' {] public void logResponseHead(HttpURLConnection con) ^[-el=oKn0 { 5Ky#GuC for(int i=1;;i++) s#Jh -+lM { ,vqr<H9e String header=con.getHeaderFieldKey(i); D'l5Zd if(header!=null) /y7M lU9 //responseHeaders.put(header,httpConnection.getHeaderField(header)); Xb
!MaNm) Utility.log(header+" : "+con.getHeaderField(header)); {K{EOB_u else )? M9|u break; Ch()P.n? } b*fgv9Kh' } O|A_PyW aq+Y7IR_ ']-@?sD$ public void splitterStop() '$As<LOEd/ { e7fiGl bStop = true; }ZSQ>8a } { wF&+kH3 #eU.p&Zc Kz<@x`0 } Ko&hj XHx 22<0DhJ ]W0EVf=,k /* *?+V65~dW **FileAccess.java =&0wr6 *//文件访问(定位,写) B{oU,3U> package NetFox; YI-O{U import java.io.*; 2>-S-;i f"7M^1)h2% cw&Hgjj2
public class FileAccessI implements Serializable{ V>64/ :{'k@J"|a //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 q1y/x@ RandomAccessFile oSavedFile; bi ozZ long nPos; cH<q:OYi Ov-b:lH j7FN\
cz public FileAccessI() throws IOException E$a ?LFa6 { B,z<%DAE this("",0); }7{t^>;D } k{tMzx]F__ NVIK>cT6 a</D_66 public FileAccessI(String sName,long nPos) throws IOException VN4yn| f/ { zPEg oSavedFile = new RandomAccessFile(sName,"rw"); H9 C9P17 this.nPos = nPos; 7z\m;
1 oSavedFile.seek(nPos); jNwjK0? } 41#w|L
\ #X:
'aj98 ULc`~] public synchronized int write(byte[] b,int nStart,int nLen) b1pQ`qt { 9/ SXs0 int n = -1; Lf:uNl*D try{ *O:r7_ Y0 oSavedFile.write(b,nStart,nLen); rOW-0B+N n = nLen; $d+DDm1o } It_M@ catch(IOException e) : FAH\ { /wQL e.printStackTrace (); 2c<&eX8" } rA0,`}8\ ggtDN{t ~/_9P Fk return n; e73^#O&Xt } v]2S`ffP @RD+xYm Zn:R
PMk* } qZ@0]"h w)E@*h<Z A6<C-1
N}j /* 6nDV1O5 **SiteInfoBean.java c_{z(W" */ AJt!!crs package NetFox; D/(L f#%JSV"7 C7T(+Wd!, public class SiteInfoBean { (-7ZI"Ku ^Yr0@pE 50jOA#l[ private String sSiteURL; //Site's URL #Z=tJ private String sFilePath; //Saved File's Path 5_K5?N private String sFileName; //Saved File's Name hovGQHg private int nSplitter; //Count of Splited Downloading File lJykyyCY+ MgnM,95 c- $Gpa}M public SiteInfoBean() /4=-b_2Y~ {//nSplitter的缺省值为5 9D@$i<D: //default value of nSplitter is 5 %kf>&b,Mi this("","","",5); \a"Ct' } W!$zXwY}( vY6W|<s ir>]r<Zl public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) kg5ev8 { J}spiVM sSiteURL= sURL; 1F[L"W;r sFilePath = sPath; OL59e%X sFileName = sName; +H'\3^C- this.nSplitter = nSpiltter; hq_~^/v\ O&?.&h XF,<i1ZlM } m@qqVRn#) /)#8)"`nT :X>DkRP public String getSSiteURL() D!FaE N { us{nyil1 return sSiteURL; =&U`9qN } u}jrfKdE +$pJ5+v *Z kss public void setSSiteURL(String value) \KM|f9-b { :EHQ .^ sSiteURL = value; _vrWj<wyf } mvTb~) uEd,rEB> R{3CW^1 public String getSFilePath() d'zT:g { aWvd`qA9r return sFilePath; &hN,xpC } Fj=NiZ= :,F=w0O 0=[0|`x public void setSFilePath(String value) $L{7%]7QC { ,IjdO(?TC sFilePath = value; vjTwv+B" } :C%47qv \Hum }0[ Zoow*`b|$U public String getSFileName() S}gD,7@ { ,L%p return sFileName; QkX@QQT? } {wu!6\:<?? 1g i}H) r<(kLpOH% public void setSFileName(String value) oQvFrSz { I7Zq}Pxa sFileName = value; *|'}v[{v^9 } cEi<}9r 9p<:LZd~ Oxn'bh6R0 public int getNSplitter() VRhRwdC { LW?2}`+ return nSplitter; -s~p}CQ. } ~~dfpW _" w:R]!e_6\9 X,53c$ public void setNSplitter(int nCount) `q1}6U/k { ddMM74 nSplitter = nCount; 4H9xO[iM } gT7I9 (x!W } D4\(:kF\Hg EEg O d.1Q~&` /* Y;PDZbK3 **Utility.java XAlD
ww */ %>]#vQ| package NetFox; Faw. GU | &\^n2`> $YR{f[+L
w public class Utility { pb=HVjW< dK7 ^ vev8l\ public Utility() "p2u+ 8? { _4S7wOq5 vKV{
$| QD6Z=>?S } F6h/0i \ !6t //线程睡眠 yO%VzjJhg public static void sleep(int nSecond) _4A&%> { uof0Oc. try{ OQ
0b$qw Thread.sleep(nSecond); <C2c"=b } uFa-QG^Y{ catch(Exception e) $jDD0<F.# { /Ir 7
DZK e.printStackTrace (); \>_eEZ5 } 7jD@Gp`" 3 } !WDn7j'A 8~rT //日志 _qdWQFuM public static void log(String sMsg) S:DcfR=a { | H5Ync[s System.err.println(sMsg); uV#-8a5! } 6NP`P j R an #jZ[ 1"N/ZKF-x public static void log(int sMsg) vQE` c@^{ { 4h[2C6
\+` System.err.println(sMsg); UEk|8yq } 1/F<T } )I^)*(} 8Fyc#Xo8 1j_aH#Fz: /* 8kKRx **TestMethod.java |Sy}d[VKsZ */ xUV_2n+ package NetFox; jTGS6{E gt(X!iN] .oW~:mY public class TestMethod { #h}IUR S+4I[|T]Y j=zU7wz)D public TestMethod() 6tCV{pgm { ///xx/weblogic60b2_win.exe qhv4R| ) try{ #w[q.+A SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); !c3Qcva //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); VhJyWH%( SiteFileFetch fileFetch = new SiteFileFetch(bean); 5+#?7J1 fileFetch.start(); Z)b)v } "oKj~:$ catch(Exception e){e.printStackTrace ();} !]UU;8h~ S:"z<O ^loF#d=s } #Q!c42}M Z:r$;`K/ kfG 65aa>_ public static void main(String[] args) !nqm ;96 { Eusf gU: new TestMethod(); 96([V|5K } E:LQ! } %<bG%V( 点击下载更多相关资料
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