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/* 9>4 #I3 **SiteFileFetch.java i975)_X( */ &j:e<{@ package NetFox; zd5=W"Y;] import java.io.*; i!2k f import java.net.*; +\Vw:~e 1 |{s8[;8 ^gcB+ public class SiteFileFetch extends Thread { b[:,p?:@ 4tm%F\Izy _6fy'%J=U SiteInfoBean siteInfoBean = null; //文件信息Bean _ ]5UuIMl long[] nStartPos; //开始位置 )f$4:Pq long[] nEndPos; //结束位置 /!0&b? FileSplitterFetch[] fileSplitterFetch; //子线程对象 i@+m<YS:2> long nFileLength; //文件长度 @ovaOX boolean bFirst = true; //是否第一次取文件 ,+df=>$W boolean bStop = false; //停止标志 9xbT?$^ File tmpFile; //文件下载的临时信息 n>pJ/l%` DataOutputStream output; //输出到文件的输出流 QD0x^v8 {v0r'+` //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) /%;J1{O public SiteFileFetch(SiteInfoBean bean) throws IOException G%HG6
{ B{=DnB6 siteInfoBean = bean; *jhgCm //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); jfK&CA tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ~E6sY
if(tmpFile.exists ()) rSv,;v { )&T 5/+ bFirst = false; 4AEw[(t read_nPos(); |kh{EUE
; } JYWoQ[ZO#> else T/ ECW { 9]+zZP_# nStartPos = new long[bean.getNSplitter()]; }IWt\a<d nEndPos = new long[bean.getNSplitter()]; BEvt{q4 } Zq&'a_ [_%u5sc-y _'w:Sx?d7 564L.^$@| } Jvc<j:{^w Ud+,/pE>FA +pgHCzwJE public void run() uxn+.fA { 6I RRRt O( //获得文件长度 =c\(]xX //分割文件 A-1KTD //实例FileSplitterFetch MOh&1]2j5 //启动FileSplitterFetch线程 {HY3E}YJL //等待子线程返回 >{{ds-- try{ muXP5MO if(bFirst) 7WH'GoBh { d#+Nef5 nFileLength = getFileSize(); dH5*% if(nFileLength == -1) 5uG^`H@X { _R(ZvsOZ System.err.println("File Length is not known!"); ]#4kqj} } <w}^Z}fpk& else if(nFileLength == -2) kjPf%*3 { ?i_/f} .K System.err.println("File is not access!"); +a*Ic8* } JAKs [@: else d)U(XiK' { HD#>K 7 for(int i=0;i<nStartPos.length;i++) >n/0od9 { jNx{*2._r nStartPos = (long)(i*(nFileLength/nStartPos.length)); @ NDcO,] } qbSI98rw for(int i=0;i<nEndPos.length-1;i++) e8f7*S8 { ;;i419 nEndPos = nStartPos[i+1]; 075IW"p' } &a'mG=(K_c nEndPos[nEndPos.length-1] = nFileLength; lIEZ=CEmY } 8J&9}@y } ~pp<
T du}HTrsC ~M*
UMF^ //启动子线程 h{o,*QL fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; L"vk ^>E6 for(int i=0;i<nStartPos.length;i++) kuBtPZ { !nL94:8U fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), :RIqA/ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), :j3^p8] nStartPos,nEndPos,i); |FT.x9e- Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); cM9>V2:P fileSplitterFetch.start(); ]U~{?K'g@j } VJ'-"8tY& // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6(?@B^S>2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); n%\\1 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", + AjV0 #n nEndPos = " + nFileLength); ik?IC$*n3i // fileSplitterFetch[nPos.length-1].start(); dk1q9Tx ]3|h6KWq [7x;H //等待子线程结束 ?$;&DoE //int count = 0; V6ECL6n //是否结束while循环 &<#1G
u_ boolean breakWhile = false; w=-{njMz6& \Qv:7;? 0)PZS> while(!bStop) $B>L_~cS { G M;uwL# write_nPos(); l0yflFGr Utility.sleep(500); ~ cu+QR) breakWhile = true; bZK`]L[ 4E!Pxjl 3a
`m_fi for(int i=0;i<nStartPos.length;i++) Z$Ps_Ik { n|=yw6aV' if(!fileSplitterFetch.bDownOver) {hO|{vz { ?JRfhJ:j breakWhile = false; 26_PFHQu4 break; {Xpjm6a7 } R. ryy } 2"xhFxoD7 if(breakWhile) Z^A( Q>{e break; |`wJ
{- ?~}8^~3 -xH3}K% //count++; q_;# EV //if(count>4) z} VCiS0 // siteStop(); bw#\"uJ } 2j>C4Ck uWXxK"J. pek5P4W_ System.err.println("文件下载结束!"); eBECY(QMQ } 1*@Q~f:Uk catch(Exception e){e.printStackTrace ();} b$Bq#vdg: } 5=MM^$QG 6l>016 x #zd}xla0] //获得文件长度 Tkf4`Gxd public long getFileSize() ON_GD" { 7.^1I7O int nFileLength = -1; /8(t: try{ oB}rd9 URL url = new URL(siteInfoBean.getSSiteURL()); LrV4^{9( HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); )i.\q httpConnection.setRequestProperty("User-Agent","NetFox"); ORV'dr N;,N6&veK/ 3o__tU)B
int responseCode=httpConnection.getResponseCode(); 2-wvL&pi) if(responseCode>=400) !. ={p8X-x { na4^RPtN\e processErrorCode(responseCode); %eqL)pC] return -2; //-2 represent access is error OEN'c0;5 } p7)b@, n)teX.ck) &]' <M String sHeader; VrRBwvp-K myY@Wp &4l>_ for(int i=1;;i++) gI~jf- w { +4p gPv //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Os7 3u#!' //Utility.log(in.readLine()); HV6'0_R0 sHeader=httpConnection.getHeaderFieldKey(i); thSo,uGlW if(sHeader!=null) =}AwA5G { ep"54o5=d if(sHeader.equals("Content-Length")) ?_c*(2i&^ { 7^:0?Q nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); PizPsJ|& break; w,FOq?j^k } r5?qz<WW~ } %sLij* else ~\m|pxcj break; FLekyJmw~ } wMB<^zZmv } f)+fdc catch(IOException e){e.printStackTrace ();} =w!14@W catch(Exception e){e.printStackTrace ();} .<`Rq' uB:utg 3E361?ubM Utility.log(nFileLength); "8"7AoE o5FBqt uNYHEs6%T$ return nFileLength; AcYL3 } @GGPw9a r`L$[C5I RSY{IY //保存下载信息(文件指针位置) `_'I 9,.a private void write_nPos() *5#Y[c { q<b;xx try{ 3y?ig2 output = new DataOutputStream(new FileOutputStream(tmpFile)); f&Bu_r output.writeInt(nStartPos.length); F3b[L^Km] for(int i=0;i<nStartPos.length;i++) PU^Z7T); { *r+i=i8{ // output.writeLong(nPos); xXu/CGzG output.writeLong(fileSplitterFetch.nStartPos); '@iS5Fni output.writeLong(fileSplitterFetch.nEndPos); $vdGkz@6 } #IP<4"Hf output.close(); 16YJQ ue } )A['+s catch(IOException e){e.printStackTrace ();} 3D
k W catch(Exception e){e.printStackTrace ();} cV5Lp4wY? } AtA}OY]D/ ?/~7\ '|Z }9Z?UtS //读取保存的下载信息(文件指针位置) 928szUo: private void read_nPos() b#.hw2?a` {
8KW}XG try{ 8lt P)K4 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); kO\(6f2|x int nCount = input.readInt(); y2^r.6"O nStartPos = new long[nCount]; Fp06a!7< nEndPos = new long[nCount]; Ne.W-,X^cL for(int i=0;i<nStartPos.length;i++) #T n~hnW { c% 0h!zF nStartPos = input.readLong(); rBkf @ nEndPos = input.readLong(); WFg'G>* } Hi9 ;i/ input.close(); j+J)S1 } O.1Z3~r-N catch(IOException e){e.printStackTrace ();} X1i6CEa< catch(Exception e){e.printStackTrace ();} v/Z}|dT" } *#frbV?; 2[Q*?N /U6G?3b private void processErrorCode(int nErrorCode) :j
vx-jQ { lbgnO s, System.err.println("Error Code : " + nErrorCode); yGH'|` } l0u6nGkh n\.K:t[: <0 R7uH //停止文件下载 M{:gc7% public void siteStop() OsAXHjX} { EUe2<G bStop = true; !Il>,q&F for(int i=0;i<nStartPos.length;i++) hX 9.%-@sR fileSplitterFetch.splitterStop(); 1p23&\\~ n@5pS3qZ @| %t<{y^I } \%EZg } o]}b#U8S //负责部分文件的抓取 4G@vO{$ **FileSplitterFetch.java %7O`]ik: */ =1^Ru*G package NetFox; -t?S:9[w p2!x8`IB* u-pE
;| import java.io.*; /+sn-$/"i import java.net.*; <jw`"L[D ?9v!UT E`iT>+LG< public class FileSplitterFetch extends Thread { 9
o-T#~i '7wI 2D Uv[:Aj String sURL; //File URL E`XUK,b long nStartPos; //File Snippet Start Position A]BG* long nEndPos; //File Snippet End Position vV#Jl)
A int nThreadID; //Thread's ID idPkJf/ boolean bDownOver = false; //Downing is over =35EG{W( boolean bStop = false; //Stop identical QCa$<~c FileAccessI fileAccessI = null; //File Access interface N^h,[ )`-9WCd& KTBsH; 6 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException *ta|, { (LTm!"Q this.sURL = sURL; 6rt.ec( this.nStartPos = nStart; bW3e*O$V this.nEndPos = nEnd;
HHWB_QaL nThreadID = id; x~j% fileAccessI = new FileAccessI(sName,nStartPos);//定位 wR nt$1 } 8Th|' L;fhJ~r _
97F public void run() Z\(+awv { Q++lgVh)E while(nStartPos < nEndPos && !bStop) jp=^$rS6[ { h+,zfVJu rbO9NRg> ]#j]yGV try{ tE3!; URL url = new URL(sURL); s7(mNpo HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); NLoJmOi;L7 httpConnection.setRequestProperty("User-Agent","NetFox"); ="d}:Jl String sProperty = "bytes="+nStartPos+"-"; _;v4]MU httpConnection.setRequestProperty("RANGE",sProperty); L:XnW1(Or Utility.log(sProperty); ,D+pGxbr
|M)'@s: (t>BO`, InputStream input = httpConnection.getInputStream(); +QtK
"5M //logResponseHead(httpConnection); \uQ(-ji 9{'GrL ,Tvk&<!0 byte[] b = new byte[1024]; vtCt6M int nRead; TW{.qed8^ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) f lVQG@ { ]6GdB3?UVM nStartPos += fileAccessI.write(b,0,nRead); (05/}PhB` //if(nThreadID == 1) 8}XtVF; // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); QyJ}zwD } ^UEI`_HO0 ^0pd- n@pn -3_-n*k! Utility.log("Thread " + nThreadID + " is over!"); QPg
QM6 bDownOver = true; ,gUSW //nPos = fileAccessI.write (b,0,nRead); 4~P{H/] } [_G_Wl'#8 catch(Exception e){e.printStackTrace ();} brl(7_2 } Xg^`fRg =T } ]p\7s QpBgG~h" 3yszfWr //打印回应的头信息 *l)_&p public void logResponseHead(HttpURLConnection con) WJ<nc+/v: { _<6
^r for(int i=1;;i++) |cEJRs@B { n!2"pRIi String header=con.getHeaderFieldKey(i); s{(aW5$!s if(header!=null) V:fz //responseHeaders.put(header,httpConnection.getHeaderField(header)); Aq yR+ Utility.log(header+" : "+con.getHeaderField(header)); A5S9F8Q/] else $]2srRA^A break; :1^
R$0d } LBq~?Q.e } 4w\
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`@ v8Vw.Ce`f !_ZknZTT public void splitterStop() cfBq/2I { |`+kZ-M* bStop = true; m2F2
} {;4Y5kj [fx1H~T< w#vSZbh } 4wjy)VD_ 5\gL+qM0 R4"*<%1 /* Xb?:dlu3 **FileAccess.java {; #u~e(W *//文件访问(定位,写) $\M<gW6 package NetFox; qB6@OS import java.io.*; }(k#,&Fv` Yv<'QC 3*)<Y}Tc public class FileAccessI implements Serializable{ *j5>2-C & ,5!&} //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 p4mi\~Q RandomAccessFile oSavedFile; uu ahR long nPos; Ne<={u% kt`_n+G mApn[)?tv public FileAccessI() throws IOException p7et>;WRx { G"k.sRKu this("",0); 8Na.H::cZ } V`P8oIOh] ^*sDJ # YnM&t
;TX public FileAccessI(String sName,long nPos) throws IOException X$*MxMNs { {1?94rz oSavedFile = new RandomAccessFile(sName,"rw"); UWU(6J|Fk this.nPos = nPos; d*qb^C{'" oSavedFile.seek(nPos); R[_Q}W'HG } C,;T/9 k;5$]^x ga?:k,xv public synchronized int write(byte[] b,int nStart,int nLen) $Lj~ge3# { 6HroKu int n = -1; rA+UftC:p6 try{ 1Vf?Rw oSavedFile.write(b,nStart,nLen); V52>K$j n = nLen; q+iG:B /Z } JJ:p A_uX catch(IOException e) -VZn`6%s { Zv]'9,cbk e.printStackTrace (); 1`hmD1d } J`6IH#54 * 'eE[/K 6ZO6O=KD return n; 6a*?m{ } rn$G.SMgz G2$<Q+UYs? _0cCTQE } #B!|sXC l4s*+H$vd? SFu]*II;{ /* Vu`5/QDq **SiteInfoBean.java ?^whK<"] */ (]E0fjk package NetFox; H(hE;|q/ -Oi8]Xw^@y ~dO+kD public class SiteInfoBean { `uKsFXM XE>w& 0OXl`V`w private String sSiteURL; //Site's URL 57fl<IM private String sFilePath; //Saved File's Path p4F%FS:` private String sFileName; //Saved File's Name tk)JE^' private int nSplitter; //Count of Splited Downloading File l
k
sNy }qw->+nD E^iShe public SiteInfoBean() 2tb+3K1 {//nSplitter的缺省值为5 o)bKs>`
U //default value of nSplitter is 5 yV~TfTJ this("","","",5); cP",szcY } upLjkQ)_ BTzBT%mP *@ { public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) NXk~o!D { {Rdh4ZKh sSiteURL= sURL; fN1b+d~*6 sFilePath = sPath; 1COSbi] sFileName = sName; y|0!sNg this.nSplitter = nSpiltter; =H`yzGt abAw#XQ8 eslvg#Q } r$1b=m,0d S"VO@)d A0>r]<y public String getSSiteURL() [_KV;qS%/ { S0Ur{!9\#^ return sSiteURL; +1a3^A\ } `g_r<EY8/ *8J0yv (j~T7og public void setSSiteURL(String value) FWB
*=.A9 { k*u6'IKi.4 sSiteURL = value; [7Q%c!e$ * } jJaMkF;f #K`0b$ _R(9O?;q public String getSFilePath() kS35X)- { t 9t
'9 return sFilePath; bEB2q\|Je } J0
dY%pH# }VRl L>HAC |VzXcV-"8) public void setSFilePath(String value) z`YC3_d { Yo1]HG(kXB sFilePath = value; A|,qjiEJCc } Fg 8lX9L )Fp$
*]| Q)y5'u qZ public String getSFileName() /\_n5XI1 { BG8/ return sFileName; :\I*_00! } eX>*}pI zRa2iCi .P`QCH;Ih public void setSFileName(String value) >_xuXEslUz { 8MI8~ sFileName = value;
)#8g<]q } P;@j ?;_>BX|Zjl $qr6LIKGw public int getNSplitter() Ssuz%* { j#2EQ return nSplitter; t1 U+7nM } _~MX~M3MB 83I 5n&) dCS f$5 public void setNSplitter(int nCount) ez ! W0 { VH~YwO!x nSplitter = nCount; tk*-Cx?_ } {l5fKVb\C } r#2Fk&Z9 xpO;V}M| 0}qlZFB /* In?#?:Q@& **Utility.java b=1E87i@W */ ^9Cu?!xu0 package NetFox; ,c^nW wBwTJCX r8eJ&-Yi{Z public class Utility { &Jb\}c} qbeUc5`1 K)wWqC. public Utility() 8{/.1: { ~gW^9nWYU t"YsIOT:O" A]5];c } MjQju@ xlJWCA*> //线程睡眠 ;s{'cN[. public static void sleep(int nSecond) prN+{N8YC { )MK$E,W try{ DE/SIy? Thread.sleep(nSecond); z8awND } [SC6{| catch(Exception e) ^7gKs2M { ?.%dQ0 e.printStackTrace (); eBnx$ } &=jPt%7#M } ^ex\S8j 1J/'R37lP //日志 Z;81" public static void log(String sMsg) ?@,EGY< { Vez8~r3 System.err.println(sMsg); WIf.;B)L } -wiQd@X "%Y=+ o4WQA"VxM public static void log(int sMsg) jL^@;"/XhC { 5kTs7zJ^ System.err.println(sMsg); ;Go^)bN
; } G@`F{l } HS{Vohy > Mc asnjC rN}8~j /* 2 wY|E<E **TestMethod.java MVzuE} */ 196a~xNV package NetFox; MmjZq dz([GP'-* H)D|lt5xy public class TestMethod { "UMaZgI :IS?si5| f_S$CFa@ public TestMethod() 6[A\cs { ///xx/weblogic60b2_win.exe b`#YJpA try{ W34xrm SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); .<`)`:n+B //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); B-C$>H^ SiteFileFetch fileFetch = new SiteFileFetch(bean); K/
On|C fileFetch.start(); KM?4J6jH } ?/3wO/7[ catch(Exception e){e.printStackTrace ();} CXuD%H]tx bzNnEH`^] "?3=FBp& } Z?'CS|ud CwX?%$S
v zg^tJ public static void main(String[] args) 0#J~@1Gf { kzRvLs4xM new TestMethod(); _Rii19k } PF`uwx@zH } c6xr[tc% 点击下载更多相关资料
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