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/* aqk0+ **SiteFileFetch.java <,!e*V*U */ LJAqk2k package NetFox; KK%R3{ import java.io.*; 58@YWvAk import java.net.*; 6RLYpQ$+ fGtUr_D k_hV.CV public class SiteFileFetch extends Thread { BB694
:q0TS>l j r<`@ SiteInfoBean siteInfoBean = null; //文件信息Bean <!s+X_^ long[] nStartPos; //开始位置 :d
ts> long[] nEndPos; //结束位置 8(Ab
NQ FileSplitterFetch[] fileSplitterFetch; //子线程对象 +I {ZW}rA long nFileLength; //文件长度 D 1Q@4
g boolean bFirst = true; //是否第一次取文件 TUQ+?[ boolean bStop = false; //停止标志 #Jo#[-r File tmpFile; //文件下载的临时信息 uoM;p' DataOutputStream output; //输出到文件的输出流 8i=c|k,GL. >vP DF+ u //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) *?a rEYc8 public SiteFileFetch(SiteInfoBean bean) throws IOException b!7*bFTt { 5mxYzu;#] siteInfoBean = bean; u._B7R&> //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); `EUufTYi tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); &]'{N69@d? if(tmpFile.exists ()) oWu2}#~z_ { T5g}z5~" bFirst = false; x9s7:F read_nPos(); =skw@c^ } :QGd/JX$n` else 2|KgRk|! { V kA$T8 nStartPos = new long[bean.getNSplitter()]; [!ghI%VK nEndPos = new long[bean.getNSplitter()]; LK}Ih@f } &G)I|mv ?~vVSY Y%FQ]Q=+ 78}QaE } ZPieL&uV` zF9SZ#{a 4'ym vR public void run() L"|~,SVF { jIMT&5k //获得文件长度 K/,y"DUN& //分割文件 s\k4<d5 //实例FileSplitterFetch H6Mqy}4W //启动FileSplitterFetch线程 E,S[3 + //等待子线程返回 6V"| try{ QgZwU$`p0 if(bFirst) o"te7nBI { "%o,P/<X nFileLength = getFileSize(); =ZE]jmD4P if(nFileLength == -1) Nq`@ >Ml { HH-A\#6J System.err.println("File Length is not known!"); 4&}V3"lg } ~$GRgOn else if(nFileLength == -2) ''{REFjK7 { vr,8i7*0 System.err.println("File is not access!"); [z2XK4\e1T } bjQp6!TsZ else u?(@hUV. { TY(B]Q_o for(int i=0;i<nStartPos.length;i++) raWs6b4Q { Kw`{B3" nStartPos = (long)(i*(nFileLength/nStartPos.length)); 0W92Z@_GY } ,cgFdOM. for(int i=0;i<nEndPos.length-1;i++) e;+6U"Jx* { MX@t[{ Gg9 nEndPos = nStartPos[i+1];
:!SVpCt3 } Wchu-] nEndPos[nEndPos.length-1] = nFileLength; toq/G,N Q } @H{QHi } NUlp4i~Q [Eeanl&x> ewo]-BQS //启动子线程 i++a^f fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; $pV:)N4 for(int i=0;i<nStartPos.length;i++) YP^=b} { JHxy_<p/ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /s@t-gTi siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 4pvT?s>68 nStartPos,nEndPos,i); w\"~*(M Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -C]k YQ
fileSplitterFetch.start(); #41xzN } 9O8na
'w // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /6=IL siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Vs[A // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ',7LVT7 nEndPos = " + nFileLength); eGwO!Lv}B // fileSplitterFetch[nPos.length-1].start(); Mnu8d:$ pyvH [
Z~g6C0 //等待子线程结束 p<eu0B_V //int count = 0; `!`g&:Y //是否结束while循环 }V:B,: boolean breakWhile = false; ''bh{
.x F9ys.Bc Frn<~ while(!bStop) z\d{A7 { 8#m,TOp write_nPos(); InO;DA\ Utility.sleep(500); !"v[\||1 breakWhile = true; Re=()M Wq5}SM k? <.yr1 for(int i=0;i<nStartPos.length;i++) !lVOZ% { 'YKzs ;y$ if(!fileSplitterFetch.bDownOver) )x!b{5'"7 { Xkqq$A4 breakWhile = false; Uuxx^>"h\ break; PBeBI: } Su]@~^w } sf([8YUd if(breakWhile)
#r=Jc8J_ break; 6'{/Ote D*%? 0 Q9yIQ{>H[ //count++; 6`PQP;
//if(count>4) Q #Tg)5.\ // siteStop(); (#&-ld6 } m4 k:uk7N 0N|l1Sn LD=e Mk:
~ System.err.println("文件下载结束!"); 5NR@<FE } H[S}&l\D4 catch(Exception e){e.printStackTrace ();} ,QeJ;U } -> ^Ex` _Gu;= H,~& w4nU86oZYl //获得文件长度 w)rd--9f public long getFileSize() (-no`j { 5}3#l/ int nFileLength = -1; P<%}!Y try{ W\c1QY$E URL url = new URL(siteInfoBean.getSSiteURL()); _o52#Q4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %(uYYr
6 httpConnection.setRequestProperty("User-Agent","NetFox"); xekU2u}WE V0l"tr@ -;:.+1 int responseCode=httpConnection.getResponseCode(); ,qT^e8E+ if(responseCode>=400) 5K:'VX { .E:3I!dH7 processErrorCode(responseCode); gW5yLb_Vz$ return -2; //-2 represent access is error u |mTF>L } VLfc6:Yg 2zV{I* =*5< w String sHeader; `SH14A* &o;d ? K ,d for(int i=1;;i++) ;!+-fn4C { %lnVzGP //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); lR>p //Utility.log(in.readLine()); EKD?j sHeader=httpConnection.getHeaderFieldKey(i); Ob&m&2s, if(sHeader!=null) DFXHD,o { ELN1F0TneH if(sHeader.equals("Content-Length")) )n&6= Li { M!/!*,~ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); g5C$#<28 break; mDXG~*1 } \8Hs[H! } `53S[8 else ri`; break; U *:ju+)k } 5SMV3~*P } Z[9t?ePL catch(IOException e){e.printStackTrace ();} 9Tg
k= catch(Exception e){e.printStackTrace ();} w:pPd;nz0Y b8 E{~z 1I awi?73 Utility.log(nFileLength); 9/`3=r@ | .gE9'"bv S,s#D9NU return nFileLength; JvsL]yRT } `6P2+wf1j~ /^L<q Q Hr'r/0 //保存下载信息(文件指针位置) c{IL"B6> private void write_nPos() wmA TV/ { vGnFX0?h try{ sd"eu output = new DataOutputStream(new FileOutputStream(tmpFile)); s f.z(o output.writeInt(nStartPos.length); |[0Ijm2 for(int i=0;i<nStartPos.length;i++) !' 0PM[ { sPMICIv| // output.writeLong(nPos); o`Af6C;Q output.writeLong(fileSplitterFetch.nStartPos); WH"'Ju5} output.writeLong(fileSplitterFetch.nEndPos); 0CvGpM, } $NCR
V:J output.close(); L]%!YP\<T } ts%
n tnvI catch(IOException e){e.printStackTrace ();} J(K/z,4h catch(Exception e){e.printStackTrace ();} Eg&:yF}?( } nLOK1@,4 L/E7xLz gj
iFpW4 //读取保存的下载信息(文件指针位置) _^eiN'B private void read_nPos() &Z3%UOY { ;B;@MD,B try{ xC9{hXg! DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); omGzyuPF int nCount = input.readInt(); 5JEOLPS nStartPos = new long[nCount]; j{'_sI{{ nEndPos = new long[nCount]; ;5.<M<PH for(int i=0;i<nStartPos.length;i++) cIQbu#[@ { o>nw~_ H\ nStartPos = input.readLong(); >tPf.xI|l nEndPos = input.readLong(); XjCx`bX^< } 4x&Dz0[[S input.close(); +$#<gp" } 5|~nX8> catch(IOException e){e.printStackTrace ();} oc]:Ty catch(Exception e){e.printStackTrace ();} 2 S~( P } |5%T) C7G,M S-}c_zbl; private void processErrorCode(int nErrorCode) +ue1+# { |/H?\]7 System.err.println("Error Code : " + nErrorCode); X.S<",a{qz } NtM ?Jh /g.c(-#] l*OR{!3H$ //停止文件下载 VBix8| public void siteStop() u8.Tu7~ { cfilH"EK bStop = true; Hi=</ Wy; for(int i=0;i<nStartPos.length;i++) W6}>iB fileSplitterFetch.splitterStop(); akNqSZwj K:jn^JN$ Pzq^x] } S<NK!89 } qPD(D{,f$ //负责部分文件的抓取 \?R#ZxP@ **FileSplitterFetch.java \/<VJB
uV */ i0$*):b package NetFox; w&p(/y Ky"FL CEI"p2 import java.io.*; ,pI9=e@O/z import java.net.*; RqGX(Iuv 6 5dMv*{ "FA.T7G public class FileSplitterFetch extends Thread { 1s@QsZ3 _qf39fM;\ \Z3K ~ String sURL; //File URL [
5}Q long nStartPos; //File Snippet Start Position `j@1]%&z long nEndPos; //File Snippet End Position pXl[I; int nThreadID; //Thread's ID nOL.% boolean bDownOver = false; //Downing is over 6QY;t:/< boolean bStop = false; //Stop identical y)&K9 I FileAccessI fileAccessI = null; //File Access interface D0xQXC3$` :K]7(y7> z/xPI)R[ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 9/29>K_ { aH{)|? this.sURL = sURL; @9KW ]7 this.nStartPos = nStart; y`buY+5l this.nEndPos = nEnd; |mQ Fi\ nThreadID = id; \ m~?yq8H fileAccessI = new FileAccessI(sName,nStartPos);//定位 i,*m(C@F} } )
yMrET
m x+Xd7N1 &Q~W{. public void run() k*fU:q1
{ \(P?=] - while(nStartPos < nEndPos && !bStop) 9% T"W { zZCRej \OVtvJV] nPXP9wmh4x try{ 6EyPZ{ URL url = new URL(sURL); >[|N%9\ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); rvd$4l^ httpConnection.setRequestProperty("User-Agent","NetFox"); q%dG>! String sProperty = "bytes="+nStartPos+"-"; +,>%Yb=EA httpConnection.setRequestProperty("RANGE",sProperty); dn-
[Gnde Utility.log(sProperty); xrg?{*\ OY`B{jV- nFEJO&1+ InputStream input = httpConnection.getInputStream(); 0Xh_.PF //logResponseHead(httpConnection); D:/ n2_ Yao}Xo9} l}z<q byte[] b = new byte[1024]; t
Y int nRead; Lkm-< while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) R}=5:)%w { DQXUh#t\(] nStartPos += fileAccessI.write(b,0,nRead); ResU5Ce~ //if(nThreadID == 1) M@A3+v%K // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); pd'0| } yv[j
Pbe %f1%9YH /]TNEU,K Utility.log("Thread " + nThreadID + " is over!"); Iy9hBAg\y bDownOver = true; fkzSX8a9} //nPos = fileAccessI.write (b,0,nRead); ccuGM W G* } (G"'Fb6d catch(Exception e){e.printStackTrace ();} sW]^YT>? } 2nB99L{6 } .*zS2z -&8( MT* iNA3Y //打印回应的头信息 LlQsc{Ddf public void logResponseHead(HttpURLConnection con) S 5S\zTPIf { 4qOzjEQ for(int i=1;;i++) O^@8Drgc { "<ZV'z String header=con.getHeaderFieldKey(i); gpV4qDXV if(header!=null) c|Ivet>3 //responseHeaders.put(header,httpConnection.getHeaderField(header)); r[L%ap\{ Utility.log(header+" : "+con.getHeaderField(header)); FQ<-Wc else 7]h %?W! break; ]ZY2\' } 9jkz83/+< } 7=l~fKu NfgXOLthM i1
E|lp) public void splitterStop() )/;KxaKt { O sgPNy0 bStop = true; o^"+X7) } ;'"'|} xn ]at$ohS hw
DxGiU } cbzA`b'Mg <XdnVe1 U zy@\ /* @?,x3\N- **FileAccess.java
=z.j{% *//文件访问(定位,写) :5t4KcQ package NetFox; !7N:cx'Qy import java.io.*; E'QAsU8pP 5
D|#l*V s6`E.Eevm public class FileAccessI implements Serializable{ .hT>a< O =Z}DGa+ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 .a%6A#<X RandomAccessFile oSavedFile; *[Hp&6f long nPos; dAI^ P/y% (Z),gxt DzZF*ylQ5P public FileAccessI() throws IOException _{*} )&!M { 7>Scf this("",0); Y 6a`{' } wLV,E,gM uzd7v, m eF7[>!U public FileAccessI(String sName,long nPos) throws IOException W5|{A])N { "#d$$ 8 oSavedFile = new RandomAccessFile(sName,"rw"); 9[eiN this.nPos = nPos; V6g*"e/8 oSavedFile.seek(nPos); 2q?/aw ;Z } { 53FR =E-x0sr? 529;_| public synchronized int write(byte[] b,int nStart,int nLen) VUP|j/qD { 1c$pz:$vX int n = -1; o@Ye_aM~?Y try{ 1[egCC\Mo_ oSavedFile.write(b,nStart,nLen); mv9D{_,pD n = nLen; -)A:@+GF } t^#1=nK catch(IOException e) +t7HlAXB# { IFLphm5 e.printStackTrace (); ql?w6qFs] } $(1t~u<17 {v"f){ (j8*F Bq return n; WIWo4[( } m#+0m! 6i/unwe!`) Y>$5j}K } *l7 `C) P]+B})) jFQ y[k-B /* 5gz ^3R|`f **SiteInfoBean.java a~2Jf @I3 */ IOHWb&N6 package NetFox; rJ/HIda o$@/@r `I7s|9-= public class SiteInfoBean { g`y9UYeh <@J$hs9s V9[_aP; private String sSiteURL; //Site's URL jOhAXe;~X{ private String sFilePath; //Saved File's Path `
nX,x-UM private String sFileName; //Saved File's Name =Uk#7U"P private int nSplitter; //Count of Splited Downloading File ra~=i|s 4"?`p;{Z Lg\3DzM public SiteInfoBean() w1<pQ[A {//nSplitter的缺省值为5 '6D"QDZB //default value of nSplitter is 5 c&;" Y{ this("","","",5); dv.
77q } ?y|&Mz'XJ( SFg4}*"C / p5]W2i., public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) aT^
$'_ G { B7Ket8<J sSiteURL= sURL; sI\NX$M sFilePath = sPath; jTwSyW sFileName = sName; +[}y`
-t this.nSplitter = nSpiltter; PTHxvml aG1Fj[, '@t,G,FJ } t__f=QB/ kR+}7G+ gV)/lDEM5 public String getSSiteURL() .BxI~d^ { #8jiz+1 _ return sSiteURL; WX Fm'5Vr } W~H`{x%Av> 1n8y4k) Q`i@['?p public void setSSiteURL(String value) A^lm 0[3q { 9>{ml&$ sSiteURL = value; @+;.W>^h } #~Xj=M% ]Mq-67 )
`{jPK*` public String getSFilePath() /yU#UZ4; { =U84*HAv return sFilePath; f['I4 /o } nZiwR4kM C32*RNG?U x`?>j$ public void setSFilePath(String value) YUSrZ9Yg { P^o@x,V!& sFilePath = value; ttr` } T=NLBJ *v#V%_ o dLqBu~* public String getSFileName() @oY+b!L { w[a(I}x return sFileName; i^WY/ OhL } ]9_tto!/ x7B;\D#`i/ ebEI%8p g public void setSFileName(String value) !,$K;L { nK< v sFileName = value; xd `MEOY } L'Iw9RAJ !Th5x2 &qY]W=9uK public int getNSplitter() F<h+d917 { fAkfNH6 return nSplitter; U=%(kOx } :~vg'v~C {KDN|o+% ;t>4VA public void setNSplitter(int nCount) =LY`K# {
9PV]bt, nSplitter = nCount; ,XscO7 } N, u]2,E } O\uIIuy NxA4*_|H9 nGX3_-U4 /* ;4dFL\KU **Utility.java h#Rza-?"\ */ Slo^tqbG package NetFox; }>y!I5O @=z.^I30 M_+W5Gz< public class Utility { aZo}Ix:/ {o^tSEN!- WnGi;AGH=1 public Utility() a
Z)1S X`D { Q"NZE PI$i_3N A|K=>7n]U } }; 7I "]2^O //线程睡眠 2 Y9u9;ah public static void sleep(int nSecond) Q)XH5C2X { #?\(l% try{ ->OVNmCB`+ Thread.sleep(nSecond); uDJ;GD[yc } ]5@n`;. catch(Exception e) 2::YR? { H;<>uELie e.printStackTrace (); &2.DZ),L } y4@gw.pt } GzaGTd.b 5~UW=
//日志 w*~s&7c2B public static void log(String sMsg) nVoWER: { `<~=6H System.err.println(sMsg); OqRRf } wjH1Ombt :J@3:+sr :81d~f7 public static void log(int sMsg)
w\D
!e { PRUl-v System.err.println(sMsg); p-\->_9)y` } $nW9VMa } |ssl0/nk Y+),c14# x'\C'zeF /* ?%~^PHgZ| **TestMethod.java dR_6j} */ NZZy^p&O package NetFox; p/nATvh$ |cnps$fk~ WvArppANo public class TestMethod { 5y
g`TW 9,JM$ Y
{ opm_|0 public TestMethod() m44a HBwId { ///xx/weblogic60b2_win.exe Ye$j43b try{ }@t"B9D SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); {K"hlu[ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); OE0G*`m SiteFileFetch fileFetch = new SiteFileFetch(bean); g"|>^90 fileFetch.start(); N>*+Wg$Ne } zdU46|!u catch(Exception e){e.printStackTrace ();} _4)z:?G5 1,)
yEeHjU ^<-r57pz } V7nOT*N:Q (&Lt&i _ ILAn2W public static void main(String[] args) 3TCRCz { %c\kLSe new TestMethod(); *-5N0K<kQ } 9`N5$;NzY } AnX<\7bc} 点击下载更多相关资料
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