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/* )^ZC'[93 **SiteFileFetch.java {<@ud0A:\ */ @s
cn ?t package NetFox; " "m-5PGYo import java.io.*; 9
@ < import java.net.*; d^nO&it t0e5L{ QJ d/j?.\ public class SiteFileFetch extends Thread { >'W,8F p+|8(w9A${ z9 Ch %A{ SiteInfoBean siteInfoBean = null; //文件信息Bean 3^%2, long[] nStartPos; //开始位置 ,7bhUE/VB long[] nEndPos; //结束位置 M1Ff ,]w FileSplitterFetch[] fileSplitterFetch; //子线程对象 /CO=!*7fz
long nFileLength; //文件长度 L&)e}" boolean bFirst = true; //是否第一次取文件 aVK,(j9u boolean bStop = false; //停止标志 K$,<<hl File tmpFile; //文件下载的临时信息 mz%l4w?' DataOutputStream output; //输出到文件的输出流 }q]*aADe 9xz@2b@ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) *cCx]C.~ public SiteFileFetch(SiteInfoBean bean) throws IOException j3;W-c`5 { i0/QfB%O siteInfoBean = bean; b way+lh //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); @@U tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); f~\H|E8( if(tmpFile.exists ()) w^
z ftm { :%J;[bS+ bFirst = false; r>ed/<_>m; read_nPos(); 9v`sSTlSd } $;G<!]& s else He'VqUw_ { Jh=.}FXnjL nStartPos = new long[bean.getNSplitter()];
l$\B>u,> nEndPos = new long[bean.getNSplitter()]; N,rd= m+ } 3{|~'5* 1!G}*38; ,(Zxd4?y ; 8DtnnE } 2"Wq=qy\J q MrM^ ~ Z;a)P.l.> public void run() F7O*%y.'; { C.:S@{sK //获得文件长度 M^Z=~512g //分割文件 Qx,#Hj //实例FileSplitterFetch G4:\6fu //启动FileSplitterFetch线程 Vf~-v$YI //等待子线程返回 '}(>s%~ try{ ;@ixrj0u if(bFirst) rZpsC}C' { ],0I`!\ nFileLength = getFileSize(); dR.?Kv(,E if(nFileLength == -1) R/"-r^j { ;f[##=tm System.err.println("File Length is not known!"); n.8870.BW } ejyx[CF else if(nFileLength == -2) y[.lfW?) { EG qu-WBS System.err.println("File is not access!"); z-kv{y*Hu
} C=r`\W else X41Qkf{ { Y%
\3 N for(int i=0;i<nStartPos.length;i++) beikzuC { |wv+g0]Pg^ nStartPos = (long)(i*(nFileLength/nStartPos.length)); ,~38IIS>_ } +`gU{e,p for(int i=0;i<nEndPos.length-1;i++) B *O/>=_ { ~<<32t'S: nEndPos = nStartPos[i+1]; ysG1{NOl } CKZEX*mPC nEndPos[nEndPos.length-1] = nFileLength; 0Yq_B+IC } oY0b8=[ } _F[a2PE2+ \8<[P(!3 2HBey //启动子线程 N".BC|r fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; UW8yu.`? for(int i=0;i<nStartPos.length;i++) u;H^4}
OQ { P.q7rk< fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), dtY8>klI siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),
`ql8y ' nStartPos,nEndPos,i); E_A5KLP Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); AEnkx!o fileSplitterFetch.start(); dl8f]y#Q } wT- -i@@ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 0_ST2I"Ln siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); k6z
]-XG // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", qS! Lt3+ nEndPos = " + nFileLength); |-{e!& // fileSplitterFetch[nPos.length-1].start(); bws}'#-* t^K Qv~ iR9duP+ //等待子线程结束 12'MzIsU's //int count = 0; ,N,@9p //是否结束while循环 24 [cU boolean breakWhile = false; u? >x cSB_b.@"1 8(Ptse
, while(!bStop) n_]B5U { !:5'MI@ write_nPos(); w@R" g%k- Utility.sleep(500); zfI{cMn'J breakWhile = true; YI*H]V%w G$'UK 9]ZfSn) for(int i=0;i<nStartPos.length;i++) (-0d@eqw { :}fA98S if(!fileSplitterFetch.bDownOver) (D?4*9= { }z/%b<o_ breakWhile = false; hNYO+LrI) break; zQ,M795@EA } I>l^lv&[+ } Lz_.m if(breakWhile) q%q+2P> break; g}Lm;gs!> r
^*D8 2^`k6V! //count++; _ ~yd //if(count>4) EX!`Zejf // siteStop(); xbw;s}B } q>K3a1x K@2"n|
S; Z-4/xi7 System.err.println("文件下载结束!"); Q6URaw#Yt` } N.Q}.(N0 catch(Exception e){e.printStackTrace ();} seAPVzWUU } #+_=(J iuXXFuh T zS?WYF //获得文件长度 ,d lq2 public long getFileSize() i9qIaG/ { sl@>GbnS int nFileLength = -1; 4HZXv\$ try{ XABP}|aWK URL url = new URL(siteInfoBean.getSSiteURL()); VuTTWBx HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); wBw(T1VN httpConnection.setRequestProperty("User-Agent","NetFox"); Iy;"ht6 PU%f`) jHE^d<=O^ int responseCode=httpConnection.getResponseCode(); z#`Qfvu6Hi if(responseCode>=400) B>cT<B { l+&DBw[ processErrorCode(responseCode); Zw{?^6;cS return -2; //-2 represent access is error icIWv
} C .B=E"e x)eF{%QB =a+
} 6 String sHeader; 2/A*\ H{i|?a) =~W=} for(int i=1;;i++) ci2Z_JA+ { tcl9:2/^] //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); SvkCx>6/G //Utility.log(in.readLine()); nIL67& sHeader=httpConnection.getHeaderFieldKey(i); 3Ur_?PM+C if(sHeader!=null) j@+$lU*r { "Vl4=W)u if(sHeader.equals("Content-Length")) :Sd`4"AA { =E!Y f#p+q nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); cl4_M{~ break; (`#z@,1 } :t "_I } 9(!AKKrr; else hP.Km%C)0n break; s3@mk\?qMe } ]n"RPktx } "Lk BN0D catch(IOException e){e.printStackTrace ();} b+arnKo1fk catch(Exception e){e.printStackTrace ();} .I#_~C'\ iWA?FBv B1U!*yzG6 Utility.log(nFileLength); GNrRc3dr$ l.
cp[ cvT@`1 return nFileLength; rx9y^E5T`; } ?>V>6cDQ YjL'GmL< c1a$J` //保存下载信息(文件指针位置) a-FI`Dv private void write_nPos() -nHkO&&R { [YODyf}M>\ try{ :O&jm.2m output = new DataOutputStream(new FileOutputStream(tmpFile)); T2rBH]5 output.writeInt(nStartPos.length); iV#A-9 for(int i=0;i<nStartPos.length;i++) #+U1QOsz { 1$C?+H // output.writeLong(nPos); [ "3s output.writeLong(fileSplitterFetch.nStartPos); L{r 4hL [
output.writeLong(fileSplitterFetch.nEndPos); ]i0=3H2 } 6=,zkU*i^ output.close(); zd!%7
UP } xb0,dZb catch(IOException e){e.printStackTrace ();} K*,,j\Q. catch(Exception e){e.printStackTrace ();} ),Yk53G6c } P?|\Ig1Gk ?mK&Slh. 3pW4Ul@e //读取保存的下载信息(文件指针位置) Qmo}esb'( private void read_nPos() {n|Uf 5 { rMjb,2*rC7 try{ kF,ME5% DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); /)K;XtcN int nCount = input.readInt(); I
2OQ nStartPos = new long[nCount]; 5cU:wc nEndPos = new long[nCount]; =6=:OId for(int i=0;i<nStartPos.length;i++) 's5rl { 0QfDg DX nStartPos = input.readLong(); -Hw3rv3o nEndPos = input.readLong(); +%K~ } vV9vB3K5? input.close(); _&s pMf } 8qw{e`c catch(IOException e){e.printStackTrace ();} =23@"ji@D catch(Exception e){e.printStackTrace ();} olxxs( } xHaz*w1| /2/aMF(J M&faa7 private void processErrorCode(int nErrorCode) QT%vrXzz { ao .vB']T System.err.println("Error Code : " + nErrorCode); a.?U$F } ~Sm6{L >35w"a7S _$D!"z7i //停止文件下载 O_.!qk1R public void siteStop() qAbmQ{|w { eu_ZsseZ bStop = true; (/]#G8 for(int i=0;i<nStartPos.length;i++) 5}]+|d; fileSplitterFetch.splitterStop(); [ @"6:tTU .%.7~Nu, hp9LV2_5 } `]6<j<'
, } e`7>QS;. //负责部分文件的抓取 VX8CEO **FileSplitterFetch.java U{pg
y#/ */ xJ. kd
Tr package NetFox; z;<~j=lP &Q}%b7 U{[YCs fk import java.io.*; vZ srlHb import java.net.*; {}Is&^3Z aD'Ax\- i(cKg&+ktd public class FileSplitterFetch extends Thread { c@}t@k Tt{z_gU6 </xf4.C String sURL; //File URL R@tEC)Zn long nStartPos; //File Snippet Start Position "gm5DE long nEndPos; //File Snippet End Position m9:ah< int nThreadID; //Thread's ID ;i?2^xe^~c boolean bDownOver = false; //Downing is over /JC1o&z_T boolean bStop = false; //Stop identical ?vAhDD5 FileAccessI fileAccessI = null; //File Access interface vF'>?O? ;sAGTq oxL<\4)WJ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException dc1Zh
W4 { g<0K
i^# this.sURL = sURL; T=M##`jP% this.nStartPos = nStart; CZeZk this.nEndPos = nEnd; AgSAjBP nThreadID = id; 62 _k`)k fileAccessI = new FileAccessI(sName,nStartPos);//定位 ~;Y Tz } X_@|+d "qR, V9\ Kn@#5MC
rU public void run() 2=8PA/ { H2#o
X while(nStartPos < nEndPos && !bStop) 9Scg:}Nj { dz+Dk6"R ,~ZD"'*n6g ,3f>-mP
try{ GCO: !,1 URL url = new URL(sURL); `<>QKpAn HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); kI@<H< httpConnection.setRequestProperty("User-Agent","NetFox"); ?0*[
L String sProperty = "bytes="+nStartPos+"-"; rEj[XK httpConnection.setRequestProperty("RANGE",sProperty); c};%VB Utility.log(sProperty); Z/?{{}H+ FE,mUpHIR ?jlz:Z4 InputStream input = httpConnection.getInputStream(); E JuTv%Y8 //logResponseHead(httpConnection); <y^_&9 @/^mFqr2 Mkk.8AjC| byte[] b = new byte[1024]; _[Imwu} int nRead; m=^]93+ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) $,, PF/N8c { F5/,S nStartPos += fileAccessI.write(b,0,nRead); Bh cp=# //if(nThreadID == 1) ZnI15bsDx // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); m<>BxX } P,'%$DLDg _\tv ${ I%a-5f$0 Utility.log("Thread " + nThreadID + " is over!"); AzXLlQ bDownOver = true; ]2)A/fOW //nPos = fileAccessI.write (b,0,nRead); j"h/v7~ } zEW+1-=)+7 catch(Exception e){e.printStackTrace ();} JOt(r}gU } Y01!D"{\ } e]88 4FP ug2W{D ycc G>%>r //打印回应的头信息 LAxN?ok9gD public void logResponseHead(HttpURLConnection con) H2Wlgt { 8^j~uH for(int i=1;;i++) j+ -r(lZ { 0: hv6Ge^ String header=con.getHeaderFieldKey(i); YuknZ&Q if(header!=null) /R=MX>JA; //responseHeaders.put(header,httpConnection.getHeaderField(header)); r W[;3yMf
Utility.log(header+" : "+con.getHeaderField(header)); `DgK$ QM else mi Q*enZi break; =NC??e { } *4`5&) ` } ={oNY.(Q J$1H3#VVG \b(&-=( public void splitterStop() ~KMah { N2A6C$s bStop = true; '0q$qN } ;; +AdN5 Nv36#^Z
iD_y@+iz } KU` *LB: T&]-p:mg^ |JYb4J4Ni /* QWfSm^
t **FileAccess.java {P~rf&Ee *//文件访问(定位,写) d8jH?P-" package NetFox; naf ~#==vc import java.io.*; ySO\9#Ho 9c)#j&2?H #vV]nI<MF. public class FileAccessI implements Serializable{ _(h=@cv A[;deHg= //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 MYy58N RandomAccessFile oSavedFile; 4mo/MK&M: long nPos; 0 N>K4ho6{ LPt9+sauf1 oHx:["F public FileAccessI() throws IOException bGeIb-|( { ; o_0~l=-/ this("",0); Hm'"I!jyO } %w65)BFQ 0 x-g0] !mUJ["# public FileAccessI(String sName,long nPos) throws IOException ^)>( <6 { PtW2S 1?j oSavedFile = new RandomAccessFile(sName,"rw"); m#RJRuZ|2V this.nPos = nPos; gUx}vE- oSavedFile.seek(nPos); g-d{"ZXd J } 63u%=-T%a
VmPh''Z%- #4$YQ public synchronized int write(byte[] b,int nStart,int nLen) raPOF6-_rH { a&8K5Z%0 int n = -1; >tcEx( try{ ;Y*K!iFWH oSavedFile.write(b,nStart,nLen); iXnXZ|M n = nLen; ftPps- } (y>N\xS9 catch(IOException e) d[3me{Rs { G:$kGzhJ e.printStackTrace (); 15j5F5P } c 1F^Gj!8 C+s/KA% X#$ oV# return n; Nz`8)Le } "crR{OjE" T/P\j0hR q\o#<'F1J } AEyD?^? x7zc3%T's ]z^jz#>um& /* cl^UFlf[ **SiteInfoBean.java V[/9?5pM */ 06.%9R{ package NetFox; N+c|0 q%;cu1^"M qK%N{ro[{? public class SiteInfoBean { xQvI$vP [l5jPL}6 [#gm[@d, private String sSiteURL; //Site's URL 9/0H,qZc private String sFilePath; //Saved File's Path *>=tmW;% private String sFileName; //Saved File's Name }}TPu8Rl private int nSplitter; //Count of Splited Downloading File /8qR7Z^HZ 9abUh3 a[~[lk=7 public SiteInfoBean() GCN-T1HvA2 {//nSplitter的缺省值为5 L.@$rFhA //default value of nSplitter is 5 |9S8sfw this("","","",5); <h/q^| tZ{ } $EFS_*<X i;%G Z8 !I?C8) public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 2: gh q { -"nkC sSiteURL= sURL; IwnDG;+Ap sFilePath = sPath; c.]QIIdK sFileName = sName; 0<`qz |_h this.nSplitter = nSpiltter; }kmAUaa,Z a8T9=KY^ cOP'ql{" } e#HPU 5CK\Z'c~! A_@..hX( public String getSSiteURL() ?Sh]kJO { /W,hOv return sSiteURL; 0 j!<eN= } _WWC8?6U 3:jxr r[Pp[g-J public void setSSiteURL(String value) 3\m! { Lld45Bayb
sSiteURL = value; ++,I`x+p } A` _dj}UF ;?HP/dZLz 4Y59^ public String getSFilePath() N/0aO^"V { :} =lE"2 return sFilePath; [ x{$f7CEh } SV t~pE+Y 1<m`38' L-?ty@-i public void setSFilePath(String value) x*z[(0g! { Jt]RU+TB sFilePath = value; QYo04`Rl } :&
Dv!z kfas4mkc N@PwC( public String getSFileName() p}pRf@(`\ { #>aq'47j return sFileName; +g?uvXC& } > .NLmzUX "G>d8GbIh n! 5(Z5= public void setSFileName(String value) r*b+kSh { 9RlJf=Z#H sFileName = value; afX|R } O
MQ?*^eA ~`BkCTT Ich^*z(F$ public int getNSplitter() @*vVc`; { M2cGr return nSplitter; i=<;$+tW } cu>(;= }6a}8EyFP )@DDs(q=i public void setNSplitter(int nCount) =!SV;^-q { 1]''@oh{6U nSplitter = nCount; NL:-3W7vf } {?lndBP< } m BvO<?ec /Yi4j,8!| nyPeN?- /* rVP\F{Q4Tr **Utility.java 0e0)1;t\ */ H'#06zP>5 package NetFox; AcuZ?LYzK ,(q]
$eOZ grE(8M public class Utility { 0#TL$?=| ?u:`?(\ L~/,;PHN public Utility() f$:Y'$Z1 { lv/im/]v l9uocP:D 3 orZBT } I]d-WTd !{+CzUo@ //线程睡眠 'MW%\W; public static void sleep(int nSecond) M *w{PjU { ( gg )? try{ AJB
NM Thread.sleep(nSecond); sm'_0EUg } E`_T_O=P catch(Exception e) B /uaRi% { %C`P7&8m=O e.printStackTrace (); P`@Rt } ] :LlOv$ } U%bm{oVn z<9C- //日志 *;}xg{@ public static void log(String sMsg) D*2*FDGI { s i2@k System.err.println(sMsg); 3);P!W4> } "|I.j) $=diG hO[_ _j8 public static void log(int sMsg) |oU I2<" { kiJ=C2'& System.err.println(sMsg); Hre&a!U } <o|fH~?X } c6 &k?Puy rzHBop-8 rK'Lvt@w /* b||usv[or **TestMethod.java J:W+'x`@ */ #pPOQv:~ package NetFox; .*YF{!R`h )B
$Q QWa@?BO2p public class TestMethod { W8bp3JX" DgcS@N %J2Ad public TestMethod() b?OA |JqX { ///xx/weblogic60b2_win.exe (${:5W try{ ,Tar?&C: SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); \&+Y;:6 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); }*rS g . SiteFileFetch fileFetch = new SiteFileFetch(bean); ]wDqdD y7S fileFetch.start(); qdZ ^D } eY#^vB catch(Exception e){e.printStackTrace ();} Vx.c`/ X<IW5* oS$7k3s
fj } D$4GNeB+# 8/j|=Q,5 r
ezp7 public static void main(String[] args) 4+>yL+sC%v { bP-(N14x+ new TestMethod(); b-8@_@f|g } {+#{Cha } i|z=WnF$& 点击下载更多相关资料
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