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/* o{PG&
}K **SiteFileFetch.java d4| )= */ -c_l
n K package NetFox; AY /9Io- import java.io.*; .KrLvic import java.net.*; ?2]fE[SqY @7Ec(]yp 39v Bsc public class SiteFileFetch extends Thread { QP(0 y98FEG#S} `?z('FV SiteInfoBean siteInfoBean = null; //文件信息Bean N3%#JdzZ$ long[] nStartPos; //开始位置 q3x"9i
` long[] nEndPos; //结束位置 \u,CixV= FileSplitterFetch[] fileSplitterFetch; //子线程对象 b j&!$') long nFileLength; //文件长度 2FMmANH0ev boolean bFirst = true; //是否第一次取文件 riIubX# boolean bStop = false; //停止标志 GW AT0 File tmpFile; //文件下载的临时信息 Ui'v'
$ DataOutputStream output; //输出到文件的输出流 t]h_w7!U #Zdh<. //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) o%_-u
+ public SiteFileFetch(SiteInfoBean bean) throws IOException /HdXJL9B { 1dN/H)] siteInfoBean = bean; r8EJ@pOF2w //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); @Tu`0=8 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); " .7@ if(tmpFile.exists ()) cfTT7O#Dc { ?w:\0j5~ bFirst = false; k4']q read_nPos(); i]ZGq7YJ% } U1YqyG8 else vFUp$[ { evyjHc Cx nStartPos = new long[bean.getNSplitter()]; In?rQiD9 nEndPos = new long[bean.getNSplitter()]; ^T&{ORWz } WsHDIp j,OA>{-$ d]E=w6+;Q P.Ntjz/B } 9K$
x2U z qA>eDx sl$6Zv-l%0 public void run() ^(q .f=I!a { R>bg3j //获得文件长度 mnA_$W3~I //分割文件 S)EF&S(TC //实例FileSplitterFetch uuM1_nD[ //启动FileSplitterFetch线程 sVh)Ofn //等待子线程返回 I#OZ:g^ try{ }ILBX4c if(bFirst) 2hHRitt36 {
I bD
u+~) nFileLength = getFileSize(); L(3&,!@ if(nFileLength == -1) "]eB2k_> { T6/P54S System.err.println("File Length is not known!"); U6-47m0% } cxR.:LD} else if(nFileLength == -2) .rBU"Rbo { 0Z2XVq~T$ System.err.println("File is not access!"); ;-3&yQ7N) } X5o*8Bg4M else G8}owszT { - +a,Ej for(int i=0;i<nStartPos.length;i++) Zq4%O7% { AWcbbj6Nd nStartPos = (long)(i*(nFileLength/nStartPos.length)); lf-.c$.> } 6.]~7n for(int i=0;i<nEndPos.length-1;i++) 'd
N1~Pa { #w''WOk@ZG nEndPos = nStartPos[i+1]; H^'%$F?Ss } G ]h nEndPos[nEndPos.length-1] = nFileLength; F:jNv3W1 } X+Sqw5rH } 2D:/.9= 8v _OGv2r qlM<X? //启动子线程 Fx!D:.)/G fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; MsI R ~ for(int i=0;i<nStartPos.length;i++) E{)X ;kN= { k{r<S|PK0 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ;=joQWNDm siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), !Ge;f/@ nStartPos,nEndPos,i); S:{xx`6K Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4V9BmVS|Th fileSplitterFetch.start(); 9 m8KDB[N } Ko&4{}/ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 29=ob(" siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); +o@:8!IM1 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", r0nnmy]{d nEndPos = " + nFileLength); @q!T,({kx // fileSplitterFetch[nPos.length-1].start(); zsuqRM
" |[~S& zHKP$k8 //等待子线程结束 p"P+8"` //int count = 0; ^U?Ac= //是否结束while循环 F;_c x boolean breakWhile = false; m=n79]b:N ;%0kzIvP bj`GGxzOb while(!bStop) KC"S06 { Rk5#5R n write_nPos(); b~UWFX#U Utility.sleep(500); E-1u_7 breakWhile = true; yR~$i3Z* ~0+<-T g}R#0gkdk} for(int i=0;i<nStartPos.length;i++) WZ`i\s1# { }8AH/ if(!fileSplitterFetch.bDownOver) PK|qiu-O&* { 4IW
fp&Q! breakWhile = false; ?Sh"%x break; HY_>sD } _<]0hC } p8XvfM if(breakWhile) +-b'+mF break; 6|lsG6uf sCJ|U6Q- 9_==C"F //count++; ;HAvor=? //if(count>4) #yIHr&'oX // siteStop(); :@5{*o } 7Cp/{l;d 3~R,)fO; X*MK(aV3 System.err.println("文件下载结束!"); f6J]=9jU } EKO'S+~ catch(Exception e){e.printStackTrace ();} "c} en[ } 0t7)x8c =c 9nC;C 59$PWfi-\ //获得文件长度 x0)=jp '
public long getFileSize() ~-NSIV:f { &x B^ int nFileLength = -1; L8n?F#q try{ Qu Mv1)n URL url = new URL(siteInfoBean.getSSiteURL()); Y,L[0% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~$>JYJj httpConnection.setRequestProperty("User-Agent","NetFox"); @f"[*7Q`/ Z&?4<-@6\p J~J+CGT~2 int responseCode=httpConnection.getResponseCode(); Y=|20Y\K if(responseCode>=400) 1P"{TMd? { W;T0_= processErrorCode(responseCode); wO.d;SK return -2; //-2 represent access is error 7bbFUUUG" } PX?%}~
v 9;I%Dv CAvi P61T String sHeader; E@otV6Wk[@ |AE{rvP{@ @D*PO-s9 for(int i=1;;i++) ud(0}[ { pam9wfP //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); |15!D //Utility.log(in.readLine()); iku*\,6W sHeader=httpConnection.getHeaderFieldKey(i); Gjq7@F' if(sHeader!=null) LCS.C(n, { '_7rooU9 if(sHeader.equals("Content-Length")) 'Q=)- { 8EkzSe nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); P@G U2[1 break; EKcPJ\7 } b{-"GqMO } !oXFDC3k else k4<28 break; Q|+ a } >&e=0@?+G } Nz3+yxv1 catch(IOException e){e.printStackTrace ();} [*It' J^ catch(Exception e){e.printStackTrace ();} 55ec23m N;YFr fsK=]~<g Utility.log(nFileLength); {5
pK8 @",#'eC" fQ1j@{Xa return nFileLength; R=a4zVQ } 6^J[SQ6P ;{H Dz$ 0U/[hG"DKN //保存下载信息(文件指针位置) KyT=:f
V private void write_nPos() Q5dqn"? { a;KdkykG try{ JW><&hY$" output = new DataOutputStream(new FileOutputStream(tmpFile)); oL R/\Y( output.writeInt(nStartPos.length); NTX0vQG for(int i=0;i<nStartPos.length;i++) kl~/tbf { jK/FzD0- // output.writeLong(nPos); "|J6*s output.writeLong(fileSplitterFetch.nStartPos); 4yqYs> output.writeLong(fileSplitterFetch.nEndPos); XP!m]\E&I }
{E(2.'d output.close(); #r"|%nOfY } h4KMhr catch(IOException e){e.printStackTrace ();} 2DsP "q79k catch(Exception e){e.printStackTrace ();} ?5ZvvAi } &0[L2x}7
Opf)TAl{ ~a3u['B //读取保存的下载信息(文件指针位置) ~vpF|4Zn5 private void read_nPos() *2~WP'~PQd { mE{QT ZS try{ H[s+.&^ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); GTfM *b int nCount = input.readInt(); C4PT(cezR nStartPos = new long[nCount]; #6#n4`%ER nEndPos = new long[nCount]; R!/JZ@au< for(int i=0;i<nStartPos.length;i++) 4P)#\$d: {
? .SiT5 nStartPos = input.readLong(); ]D5Maid+ nEndPos = input.readLong(); d>I)_05t } NTZ3Np` input.close(); kq(><T } F~E)w5?\O catch(IOException e){e.printStackTrace ();} 1Zp/EYWa{ catch(Exception e){e.printStackTrace ();} E <j=5|0t } 6J JA"] ` :ln|n6X
Z R=[@Oi private void processErrorCode(int nErrorCode) 2uT6M%OC { UE5,Ml~X System.err.println("Error Code : " + nErrorCode); ";&PtLe } YwY?tOxBe 0e#PN@ Z/: yYSq //停止文件下载 E Lq1 public void siteStop() ;c]O *\/ { k0PwAt)65 bStop = true; " v
wLj: for(int i=0;i<nStartPos.length;i++) $ eL-fg fileSplitterFetch.splitterStop(); 1TA!9cz0Z G8w @C mYJ8O$ } +PsR*T }
7;'UC',' //负责部分文件的抓取 ZGX"Vn|YL **FileSplitterFetch.java ,#;`f=aqTG */ oF+yh!~mM package NetFox; UJp'v_hN 2P'Vp7f6 Y !WGQ34R { import java.io.*; S/pU|zV[ import java.net.*; TBJ?8W( X1}M_h% <W3p! public class FileSplitterFetch extends Thread { 7z, $ OA9P"* 91&=UUkK? String sURL; //File URL M Tl
@#M long nStartPos; //File Snippet Start Position ^)Y3V-@t long nEndPos; //File Snippet End Position &Q"vXs6Gt int nThreadID; //Thread's ID v+sF0
j\P boolean bDownOver = false; //Downing is over n{<@-6 boolean bStop = false; //Stop identical AIQ
{^: FileAccessI fileAccessI = null; //File Access interface {U3jJ#K \pK&gdw ?Q=(?yR0] public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException am.d^' { ;}S_ PnwC@ this.sURL = sURL; k
75 p this.nStartPos = nStart; 6 mLC{X[ this.nEndPos = nEnd; {P?DkUO} nThreadID = id; O{byMV{Ou fileAccessI = new FileAccessI(sName,nStartPos);//定位 u w8g% } q0>9T `l?MmIJ
e'G3\h}# public void run() I;_T_m4.q { \j)c?1*$ while(nStartPos < nEndPos && !bStop) $$4flfx { BIx*( 8,+T[S |mWSS'7fI try{ j+AZ!$E URL url = new URL(sURL); k)F!gV# HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); twldwuN httpConnection.setRequestProperty("User-Agent","NetFox"); "
@"" String sProperty = "bytes="+nStartPos+"-"; ^qC.bv]& httpConnection.setRequestProperty("RANGE",sProperty); 75R4[C6T Utility.log(sProperty); og+Vrd h \`( oui0:Vy< InputStream input = httpConnection.getInputStream(); UBQtD|m\ //logResponseHead(httpConnection); MMaS .':17 $c`H c"`HKfL byte[] b = new byte[1024]; uW[AnQ1w int nRead; Z9% u,Cb while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Pk5\v0vkg { :Zq?V`+M nStartPos += fileAccessI.write(b,0,nRead); }/NjZ*u //if(nThreadID == 1) u\xrC\Ka // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); e>!]_B1ad } Wx;%W"a g0/R\ ZZ!6O /M Utility.log("Thread " + nThreadID + " is over!"); # vy[v22 bDownOver = true; KU+u.J //nPos = fileAccessI.write (b,0,nRead); l&] %APL } MB>4Y]rtU catch(Exception e){e.printStackTrace ();} +ZE"pA^C } y\iECdPU } zKYN5|17 5>1c4u`x F)'_,.?0 //打印回应的头信息 i+I.>L/S public void logResponseHead(HttpURLConnection con) }L{GwiDMDl { =.m/X> for(int i=1;;i++) srImk6YD { #z_.!E String header=con.getHeaderFieldKey(i); bccf4EyQ
Y if(header!=null) UiK)m:NU //responseHeaders.put(header,httpConnection.getHeaderField(header)); 8r,0Qic2K Utility.log(header+" : "+con.getHeaderField(header)); OaN"6Ge# else ^eRbp?H*T break; [["eK9}0 } ] 4*E: } e*D,2>o |N^8zo : ;uZq_^?:9& public void splitterStop() %_5?/H@%3z { V%M@zd?u. bStop = true; Iz#jR2:yn } -=1>t3~\
G}WY0FC6 \Y:zg3q* } ] TZ/=Id (h@~0S *a(GG /* [Q8vS ;. **FileAccess.java G&6`?1k *//文件访问(定位,写) /W}"/W9 package NetFox; K7q R import java.io.*; PEKXPFN {ueDwnZ 6TQ[2%X' public class FileAccessI implements Serializable{ vsq
|m5 +f^|Yi //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 gd]k3XN$f RandomAccessFile oSavedFile; -gb@BIV# long nPos; ^v3J
ld !.|A}8nK te>Op 1R public FileAccessI() throws IOException x+Ly,9nc$ { RtaMrG=D this("",0); \:Hh'-77q } 3Z}m5f`t mI;\ UOh' q{q;X{ public FileAccessI(String sName,long nPos) throws IOException H,!yG5yF { K1-3!G oSavedFile = new RandomAccessFile(sName,"rw"); sa"!ckh this.nPos = nPos; ~Bt>Y oSavedFile.seek(nPos); )o::~ eu } ~!Rf5QA85 b|.<rV'BTt B-$ps=G+z public synchronized int write(byte[] b,int nStart,int nLen) }qhND-9#@ { OR10IS int n = -1; |Yi_|']# try{ &c=
3BEh oSavedFile.write(b,nStart,nLen); 4%jQHOZ n = nLen; cm>+f ^4?n } ~^g*cA
t} catch(IOException e) %W2
o`W$ { S)^eHuXPI e.printStackTrace (); Gx%f&H~Z^ } ch/DBu O3p<7`K<4 -}>H3hr return n; > mP([] } AD'c#CT hi ),PfAV ]vCs9* |B } GkdxwuRw X&%;(` gYw=Z_z /* $j0<ef! **SiteInfoBean.java 6s: */ q:,ck@-4 package NetFox; P`n"E8"ab< 55Ye7P-d -wnBdL public class SiteInfoBean { PW*[(VX 2$joM`j$ ZP4y35&%y private String sSiteURL; //Site's URL rWuqlx# private String sFilePath; //Saved File's Path 1z8fhE iiE private String sFileName; //Saved File's Name l27J private int nSplitter; //Count of Splited Downloading File Lyjp -
SCFWc Ec!R3+ public SiteInfoBean() *,XT;h$'> {//nSplitter的缺省值为5 [ldx_+xa:E //default value of nSplitter is 5 Ehtb`Ms this("","","",5); |OBZSk1jp } <d3a "A}2iI
;.d{$SO public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 0(|36;x { )KN]"<jB
sSiteURL= sURL; h]^=
y.Q sFilePath = sPath; =#?=Lh sFileName = sName; E@)9'?q this.nSplitter = nSpiltter; r
4+%9) -lI6!a^ $w! v } t&(\A,ch% N6/;p]| 0F[+rh"x public String getSSiteURL() SMHQh.O?5 { {mB &xz:b return sSiteURL; ;#dzw!+Y } #D8u#8Dz ' n "n; \.MPjD public void setSSiteURL(String value) >m`<AynJ { !4fT<V( sSiteURL = value; Y^}c+)t } WeS$$:ro P<R'S @@+BPLl public String getSFilePath() )9V8&, { 8FT@TUFb return sFilePath; ZTi KU) } '<hgc
fzjZiBK@ [hKt4]R public void setSFilePath(String value) Znh)m { 0"xD>ue& sFilePath = value; _!E/em } d/` d:g T2MXwd&l wO*x0$ public String getSFileName() w?A6S-z { p!p:LSk"/b return sFileName; ,Zs*07!$f } 4k=LVu]Kcr 43o!Vr/S 6vebGf public void setSFileName(String value) tp3
!6I6 { Z oQPvs7_ sFileName = value; G:!'hadw } |Ht~o(]&&/ fTV}IP ?8@EBPpC public int getNSplitter() kk7M$)>d { E'F87P ^> return nSplitter; 4j-%I7 } s7na!A[ oD7^9=# _[ufH* public void setNSplitter(int nCount) >$N ?\\# { 2vX!j!_ nSplitter = nCount; 5$"IUq* } T Ue=Yj } `>skcvkm rsC^Re:*jr f-a+&DB9 /* {t QZqqdn@ **Utility.java 5jK9cF$> */ f!+G1z}iA package NetFox; ]sV) '- M07==R7 ev%}\^Vl[ public class Utility { 8/+x1, S% #)EVi7UP j\@osjUu public Utility() 'mU7N<Q$qQ { ,L9ioYbp C:<TJ }|(v0] } X,i^OM_ s
N|7 //线程睡眠 ~<Sb:Izld public static void sleep(int nSecond) tk,Vp3p { \TTt!"aK try{ x"n)y1y Thread.sleep(nSecond); &{H LYxh } <&p0:S7 catch(Exception e) _q 1E4z { "o>gX'm* e.printStackTrace (); 56^#x } !Di*y$`}b } wA7^ %LeZd}v //日志 ])uhm)U@ public static void log(String sMsg) ;`-@L { k<!xOg System.err.println(sMsg); xE%sPWbj } )NL_))\ 29AWg(9?aS LKe~ public static void log(int sMsg) t{RdqAF { S|v")6 System.err.println(sMsg); k1Thjt } g|PRk9 } S
0L"5B@ 0dKi25J xRPUGGv /* ]J>{ZL **TestMethod.java `u7"s' */
iP^o]4[c package NetFox; \rY<DxtOq K"U[OZC` @Zov&01 public class TestMethod { -iJ @K ,CA3Q.y>| ]\Q9j7}37+ public TestMethod() <\C/; { ///xx/weblogic60b2_win.exe }qn@8} try{ i*-L_!cc: SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); |>L|7>J{<d //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); QvjOOc@k~n SiteFileFetch fileFetch = new SiteFileFetch(bean); y(uE fileFetch.start(); ej&ZE
n } La#otuw+? catch(Exception e){e.printStackTrace ();} STY\c5 :r,o-D ^t#W?rxp& } ?R VY%s;g 6Om)e=gU/ t;e+WZkV public static void main(String[] args) T.kQ] h2ZG { 6e.?L new TestMethod(); VLO!hA# } +9d]([Lx } Y] "_} 点击下载更多相关资料
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