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/* d7qHUx'=z **SiteFileFetch.java -!k"*P */ vn9_tL& package NetFox; _T7tq import java.io.*; wZ5+ H%x import java.net.*; |#Z:v1]" '/J}T -,Z a$l public class SiteFileFetch extends Thread { 1nye.i~ 6$lj$8\ 4&2aJ_ 2y SiteInfoBean siteInfoBean = null; //文件信息Bean &+u)
+<&;( long[] nStartPos; //开始位置 *am.NH\ long[] nEndPos; //结束位置 F$N"&<[c FileSplitterFetch[] fileSplitterFetch; //子线程对象 Wf +j/RxTi long nFileLength; //文件长度 bO^#RVH boolean bFirst = true; //是否第一次取文件 5V Dqx@( boolean bStop = false; //停止标志 pc
J5UJY File tmpFile; //文件下载的临时信息 !
jm> DataOutputStream output; //输出到文件的输出流 oDXUa5x gT22!
//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) a=+qR:wT public SiteFileFetch(SiteInfoBean bean) throws IOException ri<E[8\ { 1D sgU6" siteInfoBean = bean; 7loIX Qw //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); !'Q/9%g tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); w(zlHj if(tmpFile.exists ()) <b~KR8 { %qfql bFirst = false; mx y> read_nPos(); zB kS1qMn } Q-k{Lqa- else mFC0f?nr { mzLDZ#=b nStartPos = new long[bean.getNSplitter()]; I9-vV>:z nEndPos = new long[bean.getNSplitter()]; 5zWxI]4d\ } }SR}ET&z `L/kw Vl o}C| N)' D G}} S5 } v}q3_m] Iww.Nd2 gNY}`'~hr public void run() jO)UK.H# { l*T>9yC //获得文件长度 .H
{ //分割文件 dh#4/Wa, //实例FileSplitterFetch l8/ tR //启动FileSplitterFetch线程 F:"<4hiA" //等待子线程返回 eLXG _Qb" try{ :Y`cgi0vkd if(bFirst) g}
7FR({b { 8.3888 nFileLength = getFileSize(); -'*\KA@u if(nFileLength == -1) #05#@v8.f { O:cta/M System.err.println("File Length is not known!"); UE^_SZ } @.T(\Dq^ else if(nFileLength == -2) 5RCZv\Wd& { &(UVS0=Dp, System.err.println("File is not access!"); AQ:cim` } u4*7n-( else ;$gZ?& { ;gfY_MXnF for(int i=0;i<nStartPos.length;i++) `@eo <6 { o_>id^$>B nStartPos = (long)(i*(nFileLength/nStartPos.length)); WDc2Qt } O)NEt for(int i=0;i<nEndPos.length-1;i++) \' (_r { H. U wM nEndPos = nStartPos[i+1]; y1z<{'2x } 3#o!K nEndPos[nEndPos.length-1] = nFileLength; `oQ)qa_ } 8q*MhH>6I } '#K:e jkw:h0hX #
~SuL3 //启动子线程 2gLa4B- fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; J`}5bnFP
for(int i=0;i<nStartPos.length;i++)
d1$3~Xl] { fZ!fwg$ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), VU6nu4 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ^c",!Lp}{ nStartPos,nEndPos,i); Mr'P0^^ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /Ud<4j- fileSplitterFetch.start(); LnZzY0 } qd\5S*Z1 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Cj^:8 ?% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Gu}
`X23 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", `|@# ~ nEndPos = " + nFileLength); A;VjMfoB // fileSplitterFetch[nPos.length-1].start(); <8#Q5 IH|PdVNtg )QS4Z{)U //等待子线程结束 uJ;7] //int count = 0; 1d)wE4c=Z //是否结束while循环 wO:!B\e boolean breakWhile = false; f@U\2r 5A(zQ'6 CMI'y(GN while(!bStop) -=_bXco} { P{2V@ <} write_nPos(); o|#Mq"od Utility.sleep(500); PR rf$& u breakWhile = true; 2D|2/ >[ Omy4Rkj8bh b=[gK|fu for(int i=0;i<nStartPos.length;i++) `;Qw/xl_N { Bc%A aZ0x if(!fileSplitterFetch.bDownOver) e45gjjts { -WiOs;2~/ breakWhile = false; "[(&$I break; py#` } nd)Z0%xo } P&PPX#% if(breakWhile) {;.q?mj break; ).aQ}Gwx^
$50rj Uawf,57v< //count++; 3k)W0]:|< //if(count>4) zO#{qF+~; // siteStop(); v^;-w~?3 } Q(@/,%EF -<rQOPH% Nu!(7 System.err.println("文件下载结束!"); !9GJ9ZEXM } c`:hEQs catch(Exception e){e.printStackTrace ();} m# #( uSh } 0ox
8_l p<>xqU ,nn5LQ|l.j //获得文件长度 r(sQI#
P public long getFileSize() "-aak )7w { JNhHQvi\ int nFileLength = -1; HU[a b try{ \~V
ZY URL url = new URL(siteInfoBean.getSSiteURL()); 9=,^^,q HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Wn;B ~ httpConnection.setRequestProperty("User-Agent","NetFox"); q-c9YOz_ Z9cg,#(D [e1kfw int responseCode=httpConnection.getResponseCode(); /Mk85C79 if(responseCode>=400) @**@W[EM { a& >(*PQ processErrorCode(responseCode); ua$H"(#c return -2; //-2 represent access is error >~O36q^w } hw[ jVx +$]eA'Bh@ Nda,G++5( String sHeader; $@m)8T ;8WgbR)ZLU qyXx`'e for(int i=1;;i++) !'uLV#YEZ { >r Nff!Ow //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Y|ONCc //Utility.log(in.readLine()); diXb8L7B; sHeader=httpConnection.getHeaderFieldKey(i); Fv!zS.)` if(sHeader!=null) rBBA`Ut@F { y!6+jrI if(sHeader.equals("Content-Length")) mHTZ:84 { =)Z!qjf1U nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); f1R&Q break; rNzsc|a: } 1rhsmcE } 1d49z9F else j.C)KwelBS break; @V$,H/v: } C+{du^c$ } .ZSG nbJ catch(IOException e){e.printStackTrace ();} GKPC 9;{W catch(Exception e){e.printStackTrace ();} qGndh |12Cg>;j*n g@WGd(o0) Utility.log(nFileLength); a`}b'X: y/'^r? -9BKa~ DVQ return nFileLength; m9*Lo[EXO } \EH:FM}l, u3{gX{so Y-(),k_Q: //保存下载信息(文件指针位置) (s?`*i:2 private void write_nPos() EZvB#cuL- { X]'Hz@$N try{ <pd6,l\ output = new DataOutputStream(new FileOutputStream(tmpFile)); 5j(3pV`_ output.writeInt(nStartPos.length); $V"NB`T for(int i=0;i<nStartPos.length;i++) qX'w}nJ}H} { xl5n(~g)p // output.writeLong(nPos); $YDZtS&h output.writeLong(fileSplitterFetch.nStartPos); 7 mulNq output.writeLong(fileSplitterFetch.nEndPos); S@suPkQ<> } nJ/ wtw output.close(); F?j;3@z[A } 4m++>q catch(IOException e){e.printStackTrace ();} ^+Ez[S{8 catch(Exception e){e.printStackTrace ();} ejj|l
} >:l;W4j "cerg?ix j7;v'eA`;7 //读取保存的下载信息(文件指针位置) Ks&~VU private void read_nPos() f.Y9gkt3d { T-7'#uB.m try{ 3Rid1;L0U DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); OHnHSb'?\ int nCount = input.readInt(); $cO"1mu nStartPos = new long[nCount]; aubmA0w nEndPos = new long[nCount]; <}pwFl8C) for(int i=0;i<nStartPos.length;i++) k*bfq?E a { G~ZDXQ>5CP nStartPos = input.readLong(); 7I;Give{ nEndPos = input.readLong(); 66\0JsT?3 } ld1t1'I' input.close(); {8M=[4_`l } 7e&R6j catch(IOException e){e.printStackTrace ();} Oq{&hH/'} catch(Exception e){e.printStackTrace ();} *[*E|by } dfB#+wh T:0X-U 2G"mm( private void processErrorCode(int nErrorCode) gnbs^K w { .vRLK System.err.println("Error Code : " + nErrorCode); &J|3uY,'j } Kq/W-VyGh mwFI89J' _>HXQ6Hw //停止文件下载 UTQ$sg|7p public void siteStop() ~p~8T { +3e(psdg bStop = true; ]B>Y
+ for(int i=0;i<nStartPos.length;i++) b?-%Uzp< fileSplitterFetch.splitterStop(); 5YIiO7@4 ogv86d J'.:l} g!1 } ]s jFj }
/U<-N'| //负责部分文件的抓取 uF>I0J#z? **FileSplitterFetch.java <\x/Y$jm0n */ R!xs;|] package NetFox; dQ^>,( HZ=Dd4! q`09 import java.io.*; zMX7 #, import java.net.*; ~\hA-l36 JnCY O^Qj E66e4?" public class FileSplitterFetch extends Thread { iR4CY- zdn e2 3y> .1 String sURL; //File URL s)yEVh long nStartPos; //File Snippet Start Position V_U$JKJ1= long nEndPos; //File Snippet End Position Rs)tf|`/ int nThreadID; //Thread's ID D@qq=M boolean bDownOver = false; //Downing is over v:CYf_ boolean bStop = false; //Stop identical fl~k')s FileAccessI fileAccessI = null; //File Access interface C 0*k@kGy %Ua*}C J),7ukLu^ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException g=pz&cz;>\ { N;D(_:^ this.sURL = sURL; mT@UQCG this.nStartPos = nStart; <(d^2-0 this.nEndPos = nEnd; :RHNV nThreadID = id; }*$-rieg fileAccessI = new FileAccessI(sName,nStartPos);//定位 [?W3XUJ,Y } .x6*9z#q *P:`{ZV7=W 1SkGG0
W public void run() DcoTa-~ { 9`.b while(nStartPos < nEndPos && !bStop) s;}';# { {exF"ap mMrvr9% :<ujk try{ jb)z[!FbM URL url = new URL(sURL); wx(|$2{h HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 9|jIrS%/~ httpConnection.setRequestProperty("User-Agent","NetFox"); UOF5&>MLb String sProperty = "bytes="+nStartPos+"-"; Sijwh1j*V httpConnection.setRequestProperty("RANGE",sProperty); (5-"5<-@R Utility.log(sProperty); ,k{{ZP
P {FQ
dDIj# H|F>BjXn5 InputStream input = httpConnection.getInputStream(); B_`A[0H //logResponseHead(httpConnection); k4pvp5}% +?MjY[8j ]lQhIf6)k byte[] b = new byte[1024]; 3KB)\nF#% int nRead; }'kk}2ej` while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) L4.yrA-]C% { jc;&g)Rv nStartPos += fileAccessI.write(b,0,nRead); j@UW[,UI //if(nThreadID == 1) `U p<; // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9jaYmY]~ } `{F8# z(1h ^.
CNbrXN Utility.log("Thread " + nThreadID + " is over!"); J;m[1Mae& bDownOver = true; 6xnJyEQUM //nPos = fileAccessI.write (b,0,nRead); M P0ww$( } K+T`'J4 catch(Exception e){e.printStackTrace ();} O|7q,bEm^ } Vize0fsD } uT]_pKm 5?9}^s4 Vl^jTX5N //打印回应的头信息 5I T'u3V public void logResponseHead(HttpURLConnection con) BHZGQm { s}|IRDpp for(int i=1;;i++) *i5&x/ds { P|HY=RMa String header=con.getHeaderFieldKey(i); h]@Xucc if(header!=null) @!%<JZEz3 //responseHeaders.put(header,httpConnection.getHeaderField(header)); e
yTYg Utility.log(header+" : "+con.getHeaderField(header)); Gjy'30IF else Duptles break; vU{ZB^+&6o } 2Y 6/,W } ,vg8iRa Ku,Efr wZfR>|f public void splitterStop() &lI.N~Ao { n)`*{uv$ bStop = true; ~Gwn||g78 } gvA&F|4 Htsa<tF (CZRX9TT1 } lzS"NHs<g( kf "cd1 Vx* = /* cO(|>&tJ **FileAccess.java J=4S\0Z* *//文件访问(定位,写) f+<-Jc package NetFox; 1RRvNZW import java.io.*; [>"qOFCr#: #B+2qD>E OY"{XnPZ public class FileAccessI implements Serializable{ X*S|aNaLWW C8&)-v| //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 @ULr)&9 RandomAccessFile oSavedFile; |":^3 long nPos; b.Y[:R_9& =9pFb!KX ;PS[VdV public FileAccessI() throws IOException *vBcT.|, { |_O; U=2 this("",0); i"w$D{N } ? `FI!3j NRoi`
IIj {'d?vm!r public FileAccessI(String sName,long nPos) throws IOException deeOtco$LT { EO'3;mo, oSavedFile = new RandomAccessFile(sName,"rw"); xZ,g6s2o this.nPos = nPos; A|y&\~<A oSavedFile.seek(nPos); TC R( } H.i_,ZF Nu9mK {L q
uOC1 public synchronized int write(byte[] b,int nStart,int nLen) bd)A6a\h { sBRw#xyS int n = -1; ,HMB`vF try{ 4qyL' \d[ oSavedFile.write(b,nStart,nLen); @9vz%1B<l n = nLen; ej!C^ } 1Ete;r%5= catch(IOException e) Pi+,y { U4LOe}Ny e.printStackTrace (); aNXu"US+Sp } %X[|7D- _Dk;U*2 zD) 2af return n; b,318R8+G } 6"A|)fz ?"sk"{ dnNc,l&g } E}1[& 5jYRIvM[Q~ Ah)7A|0rT /* WfO6Fvx% **SiteInfoBean.java ~@sx}u */ +Do7rl package NetFox;
ze#LX4b I <[a9"G7 &p4q# p7, public class SiteInfoBean { z),l&7 !vett4C* K -{L[Wt{1 private String sSiteURL; //Site's URL GD*6tk;5/ private String sFilePath; //Saved File's Path "&C'K private String sFileName; //Saved File's Name 4H1s"mP< private int nSplitter; //Count of Splited Downloading File b(~NqV!i u4.-AY { %C)U
F public SiteInfoBean() KgKV(q= {//nSplitter的缺省值为5 o'D6lkf0 //default value of nSplitter is 5 0V`/oaW; this("","","",5); TH6g:YP`7 } KUuwScb\ NrL%]dl3/ a(BC(^1! public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) S)Ld^0w { \h
#vL sSiteURL= sURL; KWN&nP
+ sFilePath = sPath; l"ih+%S sFileName = sName; tnKzg21% this.nSplitter = nSpiltter; OwDjUKeN !_V*VD +o_`k! } !-\*rdE{9 [0IeEjL i-&kUG_X
public String getSSiteURL() Ye(0'*-jyc { %A64 Y<K return sSiteURL; e#W@ep|n } ikm4Y`c ]`:Fj|> @rVmr{UE public void setSSiteURL(String value) $wX5`d1 { ^s24f?3 sSiteURL = value; l}<s~ip } 9prG@ F /t;y\) o*dhks[ public String getSFilePath() fT'A{&h|U { #UGbSOoCtn return sFilePath; oA42?I ^ } 8SKDL[rN w@oq.K VDQ&BmJE public void setSFilePath(String value) LU%g>?m.] { `D GO~RMp9 sFilePath = value; %*r Pd>* } Vuz!~kLYIn 8K1+ttjm ZY][LU~l8 public String getSFileName() Vxk0oIk` { My5X%)T>P return sFileName; B;rq{ac!P] } (1TYJ. Z ^&Qaf:M {O!fV<Vx 9 public void setSFileName(String value) Cf%)W:Q9 { L(X:=)
!K0 sFileName = value; s!UC{)g, } dn5T7a~
9Uk9TG 5 V#sANi?mpo public int getNSplitter() +/UInAM { Ya,>E@oc return nSplitter; \W$>EH } qP]Gl--q{ ozGK
-$ VT0I1KQx. public void setNSplitter(int nCount) xi|iV1A { E%$FX'8& nSplitter = nCount; LTJ|EXYA } l?#([(WM } i2swots h3JIiwv0! eJ?SLMLY /* 9]kWM]B)o **Utility.java )DoY*'Cl */ /j.V0% package NetFox; ?{^T&<18t ."=Bx2 BfhOe~+i public class Utility { m4kmJaM _u.l|yR cL`l1:j\} public Utility() ;,9|;)U?u { 0WYVt"|;}c _YbHnb hQX|wWh } /~AajLxu3W @3b0hi4 //线程睡眠 m~X:KwK4 public static void sleep(int nSecond) WXGLo;+>I { eaCEZHr$ try{ hp[8.Z$7 Thread.sleep(nSecond); Aja'`Mu } k.0$~juu catch(Exception e) |n* I}w^ { o>j3<#? e.printStackTrace (); I,q3J1K } -+c_TJ.dC } -vhgBru >5XE*9 //日志 Xf$,ra" public static void log(String sMsg) kbOo;<X9A { VE{t]>*-u System.err.println(sMsg); \t )Zk2 } ;l~gA |A w'cZ\<N[ |%TH|?kB public static void log(int sMsg) H%sbf&
gi { &o)j@5Y? System.err.println(sMsg); {AQ3y,sh } _L&C4 <e' } :@kSDy+*Q XB^z' P{-Y -S9$C*t /* xNl_Q8Z?R^ **TestMethod.java UJlKw `4 */ %hOe `2#$ package NetFox; 6kYn5:BhIi Vx?a&{3]- `ZNzDr public class TestMethod { M-0BQs`N v')T^b
F@ }JvyjE public TestMethod() ?2DYz"/') { ///xx/weblogic60b2_win.exe }0qgvw try{ b+3{ bE SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); T2^@x9 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); lZE x0 SiteFileFetch fileFetch = new SiteFileFetch(bean); 6Pd;I,k fileFetch.start(); Fe`$mtPu . } Ns&SZO catch(Exception e){e.printStackTrace ();} "4i(5|whp? S,qsCnz C\
9eR } uiO8F*,!&r qfG`H#cA< XCQ=`3f public static void main(String[] args) LLV:E{`p { <C]s\"o-` new TestMethod(); :8\z 0 } i!sKL%z} } 7e>n{rl 点击下载更多相关资料
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