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/* D[#6jJAb **SiteFileFetch.java ?y"=jn */ !Z(3dtUy package NetFox; ?Pbh&! import java.io.*; 4@0y$Dv\ import java.net.*; bMU0h,|] : ZehBu *{TB<^ * public class SiteFileFetch extends Thread { 9\f%+?p pT ]: TRPS 'Sk-L
5 SiteInfoBean siteInfoBean = null; //文件信息Bean z"D'rHxy long[] nStartPos; //开始位置 Lgr(j60s long[] nEndPos; //结束位置 ;fiH=_{us FileSplitterFetch[] fileSplitterFetch; //子线程对象 9IfeaoZZ4q long nFileLength; //文件长度 so=Ux2 boolean bFirst = true; //是否第一次取文件 KcPI,.4{ boolean bStop = false; //停止标志 ny++U;qi File tmpFile; //文件下载的临时信息 T'8d|$X DataOutputStream output; //输出到文件的输出流 85gdmla@9 ';,Rq9-' //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ,;%F\<b public SiteFileFetch(SiteInfoBean bean) throws IOException uz
U2)n3y { jc0Trs{Jf siteInfoBean = bean; cI#! Y //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); I)s~kA.e tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); KdN+$fe*g if(tmpFile.exists ()) v2K6y|6, { k
z{_H`5. bFirst = false; 0Tp,b (;n read_nPos(); C]dK/~Z#r } `%@|sK2 else SobOUly5{ { ;;f&aujSHD nStartPos = new long[bean.getNSplitter()]; n.L/Xp@gc nEndPos = new long[bean.getNSplitter()]; @T 5dPmn } HdR%n /U@T#S yUY* l@v] w%' 8bH! } K (px-jY LWX,u 5oOF|IYi public void run() I
l2`c}9 { ~Y)h[ //获得文件长度 RvXK?mL4F //分割文件 :n0czO6E //实例FileSplitterFetch nGoQwKIW //启动FileSplitterFetch线程 K3*8-Be //等待子线程返回 MdKkj[# try{ ~[[(_C3 if(bFirst) mu$0x) { =]F;{x nFileLength = getFileSize(); 1^v?Ly8 if(nFileLength == -1) <<vT"2Q] { K+P:g%M System.err.println("File Length is not known!"); %Eq4>o?D } myq:~^L
; else if(nFileLength == -2) _]aA58,j { AhA4IOG`. System.err.println("File is not access!"); .).}ffhOL } ,'}qLor else [Z-S0 { a@?2T,$ for(int i=0;i<nStartPos.length;i++) +-$Hx5 { q{RH/. l nStartPos = (long)(i*(nFileLength/nStartPos.length)); $C.;GU EQ } @hV F}ybp for(int i=0;i<nEndPos.length-1;i++) GeydVT- { g#}a?kTM@ nEndPos = nStartPos[i+1]; T*3>LY+bb } z
Go*N,' nEndPos[nEndPos.length-1] = nFileLength; =}pPr]Cc } ;)7 GdR^K } ]ucz8(' X}5}M+'~ xtq='s8e //启动子线程 P\k5% fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; P/?'ea for(int i=0;i<nStartPos.length;i++) c|hT\1XR, { rY:A LA fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Et0[HotO siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 7SVqfWp nStartPos,nEndPos,i); q-<t'uhs[ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?7k%4~H t fileSplitterFetch.start(); =jEh# } yRdME>_L // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >Y>>lE!
k siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); =[ZuE0c // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", iVdY\+N!< nEndPos = " + nFileLength); "54t7 // fileSplitterFetch[nPos.length-1].start(); aM6qYO!jA
~9Jlb-*I5 3U\| E //等待子线程结束 }]B H
" //int count = 0; +r<d z //是否结束while循环 I}hY @ boolean breakWhile = false; V;-$k@$b. 2leTEs5aK` kKlcK_b; while(!bStop) *=
;M',nx { 9*b(\Z)N write_nPos(); p*ic@n*G Utility.sleep(500); rAwuWM@BIg breakWhile = true; ==XO:P hT
DFIYV fBw"<J{ for(int i=0;i<nStartPos.length;i++) Tj3xK%K_r3 { <RaUs2Q3. if(!fileSplitterFetch.bDownOver) 6a MG!_jC { {1VMwANj breakWhile = false; :d{-"RAG" break; !M*$pQi} } pf@H;QS` } =bgu2#%Z if(breakWhile) c8<qn+=%? break; =_)yV0 \LbBK ~l-I .KeZZLH //count++; i"Z //if(count>4) z7$,m#tw // siteStop(); PYhRP00}M } 2M`:/ shq \#%1t qy\Z2k System.err.println("文件下载结束!"); W[4 V#&Z } "MX9h }7 catch(Exception e){e.printStackTrace ();} 9Z!|oDP- } [!'fE#"a 58>C,+ [19QpK WM //获得文件长度 P;7
Y9} public long getFileSize() zxhE9 [`*e { 5S/YVRXq int nFileLength = -1; ~A-Y%P try{ yR'%UpaE URL url = new URL(siteInfoBean.getSSiteURL()); s-lNpOi HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Xub<U>e;b httpConnection.setRequestProperty("User-Agent","NetFox"); (_.0g}2 E#A%aLp0E D.:6X'hp int responseCode=httpConnection.getResponseCode(); mYRsM s if(responseCode>=400) vDit&Lh{T { 7AouiL 2-W processErrorCode(responseCode); CA[3R return -2; //-2 represent access is error A.wuB } L,7+26XV"B o>Faq+@ s"-gnW String sHeader; mLb>*xt$b@ MIx,#]C& ziXZJ^(FI for(int i=1;;i++) Y)*:'&~2e { X Z4q{^o //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); -?}Z0e(w //Utility.log(in.readLine()); &cuDGo. sHeader=httpConnection.getHeaderFieldKey(i); @{LD_>R if(sHeader!=null) yq<mE(hS? { J)n^b if(sHeader.equals("Content-Length")) n~Qo@%Jr { UY~N4IR8 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ms/!8X$Mz break; al@Hr*' } 2Sb68hJIE } cD JeYduK else `c.P`@KA break; ;t\oM7J| } F`8B PWUY } ~`Rb"Zn catch(IOException e){e.printStackTrace ();} Bp9_\4 catch(Exception e){e.printStackTrace ();} %k=c9ll@: ,
aJC7'( 9kby-A4 Utility.log(nFileLength); {\p&? ;&OVV+y Dhze2q)o return nFileLength; Q4e+vBECkq } 2Y1y;hCK p{0NKyOvU `JzP V/6 //保存下载信息(文件指针位置) >j6"\1E+Dz private void write_nPos() 0 P2lq { P+<4w try{ pSKwXx output = new DataOutputStream(new FileOutputStream(tmpFile)); ]@wKm1%v output.writeInt(nStartPos.length); c\DMeYrg for(int i=0;i<nStartPos.length;i++) }-N4D"d4o { F|bg2)|du8 // output.writeLong(nPos); .g?Ppma output.writeLong(fileSplitterFetch.nStartPos); ~v|NC([( output.writeLong(fileSplitterFetch.nEndPos); -I'Jm=q3] } )l6(ss!J output.close(); W'!
I+nh } tYUg%2G catch(IOException e){e.printStackTrace ();} Q$58K9 catch(Exception e){e.printStackTrace ();} K*9~g(' } q~6a$8+t }CGA)yK~3 VxW>XxG0 //读取保存的下载信息(文件指针位置) 8{DW$ZtR private void read_nPos() f~P~% { 34c+70x7 try{ .
ytxe!O DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); K)N'~jCG int nCount = input.readInt(); S=_*<[W%4 nStartPos = new long[nCount]; -jWXE nEndPos = new long[nCount]; k, >*.Yoh for(int i=0;i<nStartPos.length;i++) (MzThGJK_ { =k\Qx),Ir nStartPos = input.readLong(); y"Ios:v@- nEndPos = input.readLong(); 5a%i%+;N } ]QSQr* input.close(); ap wA } +N2R'Phv catch(IOException e){e.printStackTrace ();} g+%Pg@[ catch(Exception e){e.printStackTrace ();} ,Fzuo:{uy } L2>
)HG ]=G dAW r,Tq";N' private void processErrorCode(int nErrorCode) MHQM' { ZfVw33z System.err.println("Error Code : " + nErrorCode); OfPv'rW{x } e !N% Y,M2D UFGUP]J> //停止文件下载 bPA1>p7 public void siteStop() BT|n+Y[ { fRK=y+gl@ bStop = true; ~u-_DOA for(int i=0;i<nStartPos.length;i++) 7;@o]9 W fileSplitterFetch.splitterStop(); <tgfbY^nL *hlinQKs [13NhF3.P } Q`!<2i; } M,sZ8eeq //负责部分文件的抓取 \2[sUY<W **FileSplitterFetch.java CF]#0*MI */ PwC^
]e package NetFox; cpu|tK.t q854k+C 3(3-#MD0 import java.io.*; jhB+ ] import java.net.*; |\T!,~ S.|%dz }WnoI2 public class FileSplitterFetch extends Thread { H,Yrk(O- WQBpU?O tvOyT6 ] String sURL; //File URL %`0*KMO3
long nStartPos; //File Snippet Start Position
U92?e}=] long nEndPos; //File Snippet End Position sNs Hl int nThreadID; //Thread's ID $D;-;5[-/r boolean bDownOver = false; //Downing is over :wz]d ~) boolean bStop = false; //Stop identical QRHM#v S FileAccessI fileAccessI = null; //File Access interface c F}9ldc T)mh * TByAa{ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException kb[+II {
,+!|~1 this.sURL = sURL; 5"z~BE7 this.nStartPos = nStart; j$Vtd& this.nEndPos = nEnd; >K*TgG6!X nThreadID = id; GB{Q)L fileAccessI = new FileAccessI(sName,nStartPos);//定位 ,
%A2wV } G5*_ S4D~`"4$/ 8X)1bNGqhe public void run() ,U=7#Cf! {
u"-."_ while(nStartPos < nEndPos && !bStop) ,B$e'KQ { 7'RU\0QG (|sqN8SbA /vAA]n8 try{ &Vbcwv@ URL url = new URL(sURL); \
m g HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~' q&rvk` httpConnection.setRequestProperty("User-Agent","NetFox"); kY#sQz}8 String sProperty = "bytes="+nStartPos+"-"; <ELqj2`c httpConnection.setRequestProperty("RANGE",sProperty); O6]X\Cwj% Utility.log(sProperty); lB(P+yY,/' ~`<_xIvrq 23'Ac,{ InputStream input = httpConnection.getInputStream(); }u.1$Y //logResponseHead(httpConnection); A?H.EZ aj}#~v1
hD,@>ky byte[] b = new byte[1024]; [-2Tj)P
C int nRead; $o^N_`l while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) k@Bn}r { #R#|hw nStartPos += fileAccessI.write(b,0,nRead); ]]/p.#oD, //if(nThreadID == 1) N[wyi&m4 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); oD_#oX5\ } M[6WcH0/T ]?V2L`/ 9`G}GU]@} Utility.log("Thread " + nThreadID + " is over!"); !uN_<! bDownOver = true; FmhN*ZXr# //nPos = fileAccessI.write (b,0,nRead); *wV`7\@ } L87=*_!B; catch(Exception e){e.printStackTrace ();} %i@Jw } ~i=5NUE } CM
8Ub% rQ&F Gb )P9&I.a8 //打印回应的头信息 ~}ba2dU8 public void logResponseHead(HttpURLConnection con) p"QV| ` { '/@i}
digf for(int i=1;;i++) `W{y { M~-jPY,+ String header=con.getHeaderFieldKey(i); 54%h)dLDy if(header!=null) /igbn //responseHeaders.put(header,httpConnection.getHeaderField(header)); A#CG D0T Utility.log(header+" : "+con.getHeaderField(header)); xcC^9BAj else ju(QSZ|; break; `:5W1D( } y])z,#%ED } U_AmRiy :{x
o&kgRv[ public void splitterStop() z5 :53,`D' { xB,(!0{` bStop = true; $<d3g: } WGI4DzKa CxJH)H$ mH7Mch|
m } h;t5v6[" b0[H{q-z{X yA^+<uz} /* |=#uzp7* **FileAccess.java 2IFEl-IB[ *//文件访问(定位,写) =R0#WMf$@ package NetFox; b_-?ZmV^r import java.io.*; p"o_0{8 #i|AE` Yjix]lUXVf public class FileAccessI implements Serializable{ AHdh]pfH U[c^xz& //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 RyZy2^0< RandomAccessFile oSavedFile; EALgBv>#ZL long nPos; P~u~`eH* CO"Nv kqp*o+Oz', public FileAccessI() throws IOException ~k/GmH { 6F08$,%Y this("",0);
bj U]] } j(];b+> mW_ N-z ;09U*S$eK public FileAccessI(String sName,long nPos) throws IOException
gIcm`5+T { gBJM|"_A? oSavedFile = new RandomAccessFile(sName,"rw"); K)TMr"j\ this.nPos = nPos; NEcE-7aT oSavedFile.seek(nPos); j4!oBSp } k{.`=j >kG: MJj v>p}f"$` public synchronized int write(byte[] b,int nStart,int nLen) Ap9 %5:] { mE3M$2} int n = -1; m>LC2S;
f try{ t^(wbC oSavedFile.write(b,nStart,nLen); ^.(i!BG' n = nLen; ^y3snuLtE } +4m~D`fqt[ catch(IOException e) uz[5h0c { mNnt9F3Eq e.printStackTrace (); h . R bdG } =aJb}X -aF\
u[b B&4NdL/ return n; 9xIz[`)i. } ("ulL5 ff.;6R\ I9E]zoj8
} SZm&2~|J 8@d,TjJDo 0Nq6>^
% /* EHcgWlTu **SiteInfoBean.java 6YpP/
K */ 7W `gN[* package NetFox; EmubpUS; H\@@iK= iBy
^ public class SiteInfoBean { yfCdK-9+B <jHo2U8/"s ~91) DNaE private String sSiteURL; //Site's URL XonI private String sFilePath; //Saved File's Path V~_aM@q1 private String sFileName; //Saved File's Name Tq`rc"&7u private int nSplitter; //Count of Splited Downloading File !%Qm{R &kNJs{ 7S)u7 public SiteInfoBean() e BxOa {//nSplitter的缺省值为5 18kzR6(W //default value of nSplitter is 5 o2r)K AA this("","","",5); 8@-
UvT&o } 'n0u6hCSb y%=t((.Z B kWoK/f4 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 2'5%EQW;0y { 8sGaq [ sSiteURL= sURL; *:hHlH* t1 sFilePath = sPath; 5p`.RWls sFileName = sName; k\`~v$R3 this.nSplitter = nSpiltter; zTQTmO TE t+At`] %W:]OPURK } 8^ezqd` \oc* l8Ks{(wh public String getSSiteURL() QeZK&^W { v35=4>Y return sSiteURL; Ht!]% } S1oP_A[| Qfd4")zhG 13KfI public void setSSiteURL(String value) uf<nVdC. { N)b.$aC sSiteURL = value; 2#?qey } /1R` E9 t>izcO 1#-=|:U public String getSFilePath() TSHQ>kP { m C&*K return sFilePath; \C.s%m } )mF;^3 vS_Ji<W~E v"N%w1`.e public void setSFilePath(String value) qL?`l;+ { \OX;ZVb?5 sFilePath = value; fNTe_akp } eJ
O+MurO TDo!yQ oUG!=.1}K5 public String getSFileName() K:\db'`` { k1)=xv#S return sFileName; cczV}m2) } z c7P 2@ iR(jCD?) Y ,/bv3pE public void setSFileName(String value) F2#s^4Ii { 01/yog sFileName = value; _BP!{~&; } m"y_@Jk 1 /dy@' Y ~%9TC public int getNSplitter() oe*Y(T\G { 27q=~R} return nSplitter; "Gh5
^$w?j } aS,M=uqqK >GV= % yE4X6 public void setNSplitter(int nCount) m/(f?M l { >wOqV!0< nSplitter = nCount; e qzmEg } OX!<{9o } \Q m1+tg />,KWHR|: 12JmSvD /* x%d\}%] **Utility.java oP CtLz}z */ :497]c3#5C package NetFox; a(BEm_l3 y>YQx\mK |MQ_VZ{6 public class Utility { 8M&q OPtFz6 YLVZ]fN=> public Utility() wq@{85 { _)U[c;^6 U&}v1wdZ3 ^;@Q3~DpP% } f;7I{Z\< NplWF\5y //线程睡眠 .lt|$[" public static void sleep(int nSecond) -mur`tC {
^D.u try{ ft"t Thread.sleep(nSecond); Z\9DtvV } gfY1:0 catch(Exception e)
BhcTPQsW { MJDW-KL- e.printStackTrace (); 44p?x8(z* } 8,^2'dK34 } MaS"V`NI $pLJtQ //日志 z:7
i@m public static void log(String sMsg) e!hy,O{Pw { o$%I{}9x System.err.println(sMsg); P/e6b
.M } gXP)YN aR0'$*3E M8p6f)l3 public static void log(int sMsg) Y;dQLZCC { eF%>5 System.err.println(sMsg); cFF'ygJ/ } BV@xE } ={]tklND []I_r= {^jk_G\ys /* lI*uF~ 'D **TestMethod.java W8>< */ CL)*cu6zG package NetFox; N" =$S|Gs 9-(
\\$% BdQ/kXZu+ public class TestMethod { }F<= ]aN]H a ~(~
y=M public TestMethod() WPpS? { ///xx/weblogic60b2_win.exe _ \LPP_ try{ t 8,VR FV SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 4/J"}S //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 5dXDL~/2p SiteFileFetch fileFetch = new SiteFileFetch(bean); j
:$Ruy fileFetch.start(); 4!k0 } li7"{+ct catch(Exception e){e.printStackTrace ();} L7rH=gZ&!] l =Is-N` ZtofDp5B } D%%@+3a HV}*}Ty OB5t+_s public static void main(String[] args) 4;D>s8dgG { fUV;3du new TestMethod(); :% m56 } }xG~a=, } p1`")$ 点击下载更多相关资料
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