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/* iINd*eXb^ **SiteFileFetch.java @?$x */ brA\Fp^ package NetFox; 3iHUG^sLW import java.io.*; hlpi-oW` import java.net.*; iyF~:[8 mTcop yp SO#NWa<0| public class SiteFileFetch extends Thread { i+$G=Z#3E BitP?6KX B&~#.<23: SiteInfoBean siteInfoBean = null; //文件信息Bean R\%&Q| long[] nStartPos; //开始位置 2nW:|*:/p6 long[] nEndPos; //结束位置 3[g%T2&[ FileSplitterFetch[] fileSplitterFetch; //子线程对象 S <C'#vj long nFileLength; //文件长度 )uvs%hK boolean bFirst = true; //是否第一次取文件
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boolean bStop = false; //停止标志 _;G. QwHr File tmpFile; //文件下载的临时信息 ,9I %t%sb DataOutputStream output; //输出到文件的输出流 uXX3IE[ o5 UM)g //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) +*2 ]R~"M public SiteFileFetch(SiteInfoBean bean) throws IOException $niJw@zC { zI5#'<n siteInfoBean = bean; Zl69d4vG //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ?MT
V!i0 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); "K3"s Ec% if(tmpFile.exists ()) @l)HX'z0d { 2D;,' bFirst = false; w-%V9]J1 read_nPos(); b'9\j.By } <9JI@\> else iGxlB { "@1e0`n
Q nStartPos = new long[bean.getNSplitter()]; P|>
f O' nEndPos = new long[bean.getNSplitter()]; B{UL(6\B } sb Wn1 T
U 9`P<|( Gkz\By >h^CC*&'pw } WaY_{)x yrp5\k*{y hk
=nXv2M public void run() D#ZzhHHP { {:U zW\5l) //获得文件长度 O)y|G%O //分割文件 J<g$hk //实例FileSplitterFetch !^{0vFWE //启动FileSplitterFetch线程 #wXq'yi //等待子线程返回 woCmpCN*I try{ >K
}j}M% if(bFirst) 00Tm]mMQX { >WfkWUb nFileLength = getFileSize(); k3F*D if(nFileLength == -1) ~*OQRl6F { \J*~AT~5q System.err.println("File Length is not known!"); (twwDI } [{]/9E/& else if(nFileLength == -2) 5K_KZL- { N/wU P System.err.println("File is not access!"); X$aN:!1 } h<)YZ[;x else PtH>I,/ { f{
;L"*L for(int i=0;i<nStartPos.length;i++) ,$"*X-1 { 7jss3^.wA nStartPos = (long)(i*(nFileLength/nStartPos.length)); xLxXc!{J5 } =L,s6J8_' for(int i=0;i<nEndPos.length-1;i++) i2. +E&3v { %gK@R3p nEndPos = nStartPos[i+1]; !GB\-( } >
-P UY nEndPos[nEndPos.length-1] = nFileLength; asDk@Gcu } ;WydXQ}Q^ } eIZ7uSl yQAW\0` Y nD_:ZK //启动子线程 :c4iXK0_^? fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; IUB#Vdx for(int i=0;i<nStartPos.length;i++) mGss9eZa { ]!@z3Hv3 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
rG#o*oA siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), )uj:k*`) nStartPos,nEndPos,i); C[E[|s*l Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6j*L]Sc fileSplitterFetch.start(); >K|<hzZ } :Ma=P\J
W // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ORVFp]gG siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); c[p>*FnP // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", >XTDN nEndPos = " + nFileLength); ,\YlDcl':0 // fileSplitterFetch[nPos.length-1].start(); <+7]EwVcn^ BHmmvbM#Qm qDG{hvl[1r //等待子线程结束 Pu|PIdu!08 //int count = 0; (R'GrN> //是否结束while循环 g8=j{]~C boolean breakWhile = false; }>q%##<n Uq}F rK} #6fQ$x(F#j while(!bStop) $&fP%p { A_h|f5
write_nPos(); \nfjz\"R?b Utility.sleep(500); ){-Tt`0(u breakWhile = true; Ge'[AhA `S`,H $N
!l-lu= for(int i=0;i<nStartPos.length;i++) @u@N&{b5" { \`ya08DP( if(!fileSplitterFetch.bDownOver) l(irNKutgo { o|Q:am'H breakWhile = false; T^z break; B^7B-RBi0 } I_?+;<n } 1/JtL>SKE if(breakWhile) 9i6z p' break; )JNUfauyT bcM65pt_C ,.<[iHC}9 //count++; B=?m_4\$m //if(count>4) Zqo // siteStop(); o\TXWqt } /$EX-!ie $,b1`* -0I]Sm;$ System.err.println("文件下载结束!");
Rcn6puZt } `, lnBP3D" catch(Exception e){e.printStackTrace ();} wBuos}/ } 3]46qk' ^ gy"$F3{` be<7Vy]j //获得文件长度 hFW{qWP public long getFileSize() n]3Lqe; { g-C)y
06 int nFileLength = -1; f9%M:cl try{ !t;B.[U * URL url = new URL(siteInfoBean.getSSiteURL()); !7rk>YrY HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ES4[@RX httpConnection.setRequestProperty("User-Agent","NetFox"); *#n#J[ Z2t'?N|_ 5WlBec@ int responseCode=httpConnection.getResponseCode(); %%-?~rjI if(responseCode>=400) qsA`\%]H { u5'jIqlU processErrorCode(responseCode); @K=:f return -2; //-2 represent access is error dmB
_`R } KUV(vAY, pW7#&@AR TPBL|^3K String sHeader; Zra P\ ? pu"m(9 U} K]W>Z for(int i=1;;i++) .!`y(N0hc { \kR:GZ`{UV //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); .or1*-B K //Utility.log(in.readLine()); c,yjsxETW sHeader=httpConnection.getHeaderFieldKey(i); J4) ?hS if(sHeader!=null) v1R t$[ { <rKfL`8p if(sHeader.equals("Content-Length")) FjU
-t/ { (drDC1\ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); &6@#W]_ break; zObrp } TOH+JL8L } -d*zgP else nb30<h break; 0en
Bq>vr } Pb]EpyAW } WSsX*L catch(IOException e){e.printStackTrace ();} F97HFt6{ catch(Exception e){e.printStackTrace ();} _SQQS67fu" g7l?/p[n w(N$$ Utility.log(nFileLength); #xoFcjRE 1sIPhOIys }m -A #4. return nFileLength; ?*/1J~<(@ } 9F"^MzZ my}l?S[2d@ ,]L sX"u //保存下载信息(文件指针位置) ;CtTdr private void write_nPos() KW@][*\uC { s?yl4\]Muf try{ bSkr:|A7 output = new DataOutputStream(new FileOutputStream(tmpFile)); !+)5?o output.writeInt(nStartPos.length); v.!e1ke8D* for(int i=0;i<nStartPos.length;i++) -)%gMD~z1 { Gl6M(<f\5 // output.writeLong(nPos); VBN=xg} output.writeLong(fileSplitterFetch.nStartPos); 8-s7s!j output.writeLong(fileSplitterFetch.nEndPos); =M ."^X } 3%(BZ23 output.close(); /=@V5) } |44 E:pA catch(IOException e){e.printStackTrace ();} A|`mIma# catch(Exception e){e.printStackTrace ();} 6
=H]p1p~O } hRI?>an =,J-D6J? >9+h2B
//读取保存的下载信息(文件指针位置) vo"?a~kY7 private void read_nPos() O!k C { kKs}E| T try{ 2u%YRrp DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); v/GZByco> int nCount = input.readInt(); 1EHL8@.M nStartPos = new long[nCount]; 7?p>v34A nEndPos = new long[nCount]; Vv_lBYV for(int i=0;i<nStartPos.length;i++) =`OnFdI { Ca}V5O nStartPos = input.readLong(); l_i&8*=Px nEndPos = input.readLong(); ^US ol/ } s(8e)0Tl input.close(); [;pL15-}4 } W690N&Wz catch(IOException e){e.printStackTrace ();} K#kMz#B+i catch(Exception e){e.printStackTrace ();} _-:CU
} jAxrU *[+{KJ XR+ private void processErrorCode(int nErrorCode) zrL +:/t { q^eLbivVE System.err.println("Error Code : " + nErrorCode); U.pGp]\Q)G } V|vXxWm/ :I(d-,C k9!euj& //停止文件下载 t8f:?
public void siteStop() sP@7%p>wt { 6FFM-9*|[ bStop = true; f taa~h* for(int i=0;i<nStartPos.length;i++) fn,
YH fileSplitterFetch.splitterStop(); 71c(Nw~iQ 6){nu rDBG Vs9]Gm } :NynNu' } B4eV $~< //负责部分文件的抓取 M-/2{F[ **FileSplitterFetch.java #]*]qdQWV^ */ sf Zb$T
J package NetFox; XaH; 9dwLkr T-y5U}, import java.io.*; srryVqgS import java.net.*; :U,-v 30bdcDm, l9z{pZ\KM public class FileSplitterFetch extends Thread { [8'^" NL-V",gI-~ z,g\7F[ String sURL; //File URL >rY^Un{Z long nStartPos; //File Snippet Start Position 3
p!t_y|SX long nEndPos; //File Snippet End Position jJV1 /]TJ int nThreadID; //Thread's ID D77s3AyHK boolean bDownOver = false; //Downing is over "eIE5h boolean bStop = false; //Stop identical SedVp cb+ FileAccessI fileAccessI = null; //File Access interface +R',$YzD Rnw v/) %+oV-o\ #A public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException =}%Q}aPp { kZ'wXtBYe this.sURL = sURL; S\sy] 1*?$ this.nStartPos = nStart; $msf~M* this.nEndPos = nEnd; br')%f}m nThreadID = id; -Yg?@yt fileAccessI = new FileAccessI(sName,nStartPos);//定位 =kb/4eRg } BFQ`Ab+ =%d.wH?dZ/ +wcif- public void run() FKy2C:R(] { (!% w while(nStartPos < nEndPos && !bStop) ]RxWypA` { T/?C_i #c(BBTuX B:6VD /qC try{ "DSRy D0M URL url = new URL(sURL); Yb?(Q% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); bd&Nf2 httpConnection.setRequestProperty("User-Agent","NetFox"); NdB:2P String sProperty = "bytes="+nStartPos+"-"; ,S?M;n?z_ httpConnection.setRequestProperty("RANGE",sProperty); 87rHW@\]( Utility.log(sProperty); |XJ|vQGU EMf"rGXu( A5~OHmeK InputStream input = httpConnection.getInputStream(); nTHCb>,vM //logResponseHead(httpConnection); ZOy^TR G|j8iV O Go
!{T byte[] b = new byte[1024]; `!C5"i8+i2 int nRead; [0H]L{yV while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) .[o`TlG% { BOme`0A nStartPos += fileAccessI.write(b,0,nRead); ?>q5Abp[ //if(nThreadID == 1) SHQgI<D7 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); z
q@"qnr } *l)}o4-$ GriFb]ml" c3N,P<# Utility.log("Thread " + nThreadID + " is over!"); ~8Ez K_c bDownOver = true; o)M<^b3KO //nPos = fileAccessI.write (b,0,nRead); ;O {"\H6 } Nuaq{cl catch(Exception e){e.printStackTrace ();} V82hk0*j } (/C
8\}Ox } s'$3bLcb k< '
BY|7j~ //打印回应的头信息 Tua#~.3}J public void logResponseHead(HttpURLConnection con) }Io5&ww:U { Is>~ P*2Y= for(int i=1;;i++) U,V+qnS { *rmM2{6 String header=con.getHeaderFieldKey(i); $spk.j if(header!=null)
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//responseHeaders.put(header,httpConnection.getHeaderField(header)); uE'Kk8 Utility.log(header+" : "+con.getHeaderField(header)); RP%FMb}nt else *#j_nNM4 break; -EG=}uT['b } k;
ned } }r|$\ms `vD.5 Wo~;h(6 public void splitterStop() g1&q6wCg| { %(>,eee_ bStop = true; [#;CBs5o } u_6x{",5I ;Mz7emt \`-a'u=S } _z53r+A
ITfz/d8 ?cB26Zrcb /* {=9"WN **FileAccess.java (1Klj+"p% *//文件访问(定位,写) dg4q+ package NetFox; r?HbApV P import java.io.*; GxA[N QFIYnxY9 Uwg*kJ3H public class FileAccessI implements Serializable{ &[kFl\ %wN*Hu~E //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 9S8V`aC RandomAccessFile oSavedFile; T}K@ykT long nPos; WntolYd VTK +aI /#!1 public FileAccessI() throws IOException -GYJ)f { #1Iev7w this("",0); c N~F32< } FLLfTkXdI 15M!erT b ; U public FileAccessI(String sName,long nPos) throws IOException +Os9}uKf { t<MO~_`! oSavedFile = new RandomAccessFile(sName,"rw"); bCV_jR+ this.nPos = nPos; bOD]`*q oSavedFile.seek(nPos); W('V2Z-q } #^xj"}o@ ~$m:j]; l{hO"fzy public synchronized int write(byte[] b,int nStart,int nLen) ^IO\J{U{"x { EC7)M}H int n = -1; kn}bb*eZ try{ f s2}a oSavedFile.write(b,nStart,nLen); VUzRA"DP| n = nLen; \2 M{R } N$M:&m3^ catch(IOException e) nT=XWM { rtz ]PH e.printStackTrace (); 8@7leAq! } 83_vo0@<6 ,y gDNF a2B9
.;F return n; $.3J1DU } x57O.WdN S+GW}?! rAA?{(!9x } X-`PF +7r?vo1 1Sd<cOEd /* pI(
H7 ( **SiteInfoBean.java - @t L]] */ ;OSEMgB1 package NetFox; TbgIr J9lG0 VMw[M^ public class SiteInfoBean { fwv.^kx *|6*jU x$.0:jP/s private String sSiteURL; //Site's URL UVgDm&FF private String sFilePath; //Saved File's Path S0?e/VWy private String sFileName; //Saved File's Name \ \g Aa-}: private int nSplitter; //Count of Splited Downloading File -d^c!Iu| o&Y
R\BI/ |N:kf&]b public SiteInfoBean() '}F..w/ {//nSplitter的缺省值为5 A\|:hzu+ //default value of nSplitter is 5 ?~/_&=NSx this("","","",5); {0L)B{| } N'YQ6U L
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#"Yn _C@<*L=Q public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 90gKGyxF { X 1}U sSiteURL= sURL; aEdc8i? sFilePath = sPath; LknV47vd sFileName = sName; eOJ_L]y- this.nSplitter = nSpiltter; `bW0Va
N )|KZGr <"nF`'olV } (>`S{L
C>s ]s`cn}d lhB;jE public String getSSiteURL() + De-U. { 1aoKf F( return sSiteURL; x/IAc6H~_8 } QT\"r T9# @^nE^; ]Ryg}DOQ public void setSSiteURL(String value) n1rJ^q-G { U[6
~ad
a sSiteURL = value; Su*Pd; } G4G<Ow)` L6J.^tpO 0xUn#&A~ public String getSFilePath() I?CfdI { J/\^3rCB return sFilePath; ,AG k4] } T 2Gscey [>|6qY$D Zz! yv(e)H public void setSFilePath(String value) spTIhZ { Y.E]U!i* sFilePath = value; 4q\gFFV4 } 7A{,)Y/w ^ p)s*Cw \{ff7_mLo public String getSFileName() CykvTV Q { T*](oA@ return sFileName; _7,4C? } ,{BF`5bn| S(G&{KG -"}nm!j /5 public void setSFileName(String value) 2cko
GafG{ { x{1S!A^ sFileName = value; |] ]Rp } 6{H@VF<QY!
MsP`w3b S&MF; E6 public int getNSplitter() bH.f4-.u>) { fn Pej?f: return nSplitter; M^0^l9w } i?6#>;f #fq&yjl#A m*` W&k[ public void setNSplitter(int nCount) 'v%v*Ujf[ { ]~\%ANoi nSplitter = nCount; ef:YYt{|q } ;:8SN&). } HA~BXxa/ tfPe-U 4AYW'j C /* sNsWz.DLT# **Utility.java :Kk+wp}f# */ $pj;CoPm package NetFox; eV( Wn5xX5H C s \q
m public class Utility { q!<n\X3]u j Kp79]. :nxBM#:xu public Utility() fPab%>/T{ { yXCJ? hh<ryuZ $8fJ DN } ~-#8j3 J; BZk0B? //线程睡眠 5KL??ao- public static void sleep(int nSecond) 7rIEpN>* { #F ;@Qi3z try{ C@rIyBj1g Thread.sleep(nSecond); ;bkvdn} } 0"koZd,c catch(Exception e) InB'Ag" { k<k@Tlo e.printStackTrace (); =S|dzgS/ } l*+9R } } /aqh ;W Kk 6i //日志 uex([;y public static void log(String sMsg) 7t|011< { sEcg;LFp System.err.println(sMsg); pZ&?uo67_ } !^qpV7./l lnt}l #BhcW"@ public static void log(int sMsg) U]
av{}U { T;{"lp. System.err.println(sMsg); G>S3? jGk } nOq`Cwh9 } 5k`Df/ [*d<LAnuWP P5oYv /* #NQx(C **TestMethod.java -~&T0dt~ */ KdLj1T package NetFox; UI74RP aa/_:V@$~ ]I(<hDuRp public class TestMethod { aU%QJ#j $DhW=(YM_a {@
Z%6%'9 public TestMethod() *&$2us0%% { ///xx/weblogic60b2_win.exe k;!}nQ& try{ Lo5CVlK SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); k:*vD" //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); gi<%: [jT SiteFileFetch fileFetch = new SiteFileFetch(bean); <Eh_ fileFetch.start(); ;!pJ%p0Sc } ~o8x3`CoF catch(Exception e){e.printStackTrace ();} 3(=QY) jDCf]NvOPM e6_` } ]s}9-!{O
K'S\$ r<EwtO+x public static void main(String[] args) UiH5iZ<r; { VVHL@ new TestMethod(); s+6tdBvzs } 4x?4[J~u[ } 0 1:(QJ 点击下载更多相关资料
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