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/* L1Fn;nR **SiteFileFetch.java ;MCv */ dj?.Hc7od package NetFox; u-pE
;| import java.io.*; A86#7 import java.net.*; |>A1J: ?;|$R s:R>uGYOd public class SiteFileFetch extends Thread { v.cB3/$z Nb#E+\q c"H4/,F SiteInfoBean siteInfoBean = null; //文件信息Bean GfJm&'U& long[] nStartPos; //开始位置 0X0HDQ long[] nEndPos; //结束位置 &EXql'] FileSplitterFetch[] fileSplitterFetch; //子线程对象 WaN0$66[: long nFileLength; //文件长度 ;#3!ZB:} boolean bFirst = true; //是否第一次取文件 Uv[:Aj boolean bStop = false; //停止标志 6}x^T)R File tmpFile; //文件下载的临时信息 `wB(J%w DataOutputStream output; //输出到文件的输出流 vjZX8KAiZ EiP_V&\ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 5xLuu KG public SiteFileFetch(SiteInfoBean bean) throws IOException _7]5Q { E7^tU416 siteInfoBean = bean; idPkJf/ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); i{ T0[\4 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); /I$g .f/# if(tmpFile.exists ()) F]z xx { 8_Y{7;<ey bFirst = false; {TzKHnP read_nPos(); ]J;^< 4l
} ;{q7rsE else C
n\'sb{ { mV`Z]-$$i nStartPos = new long[bean.getNSplitter()]; # u^F B nEndPos = new long[bean.getNSplitter()]; }.o
rfW } zL3~,z/o 5$GE 3IER8 u+[ZWhKUp bW3e*O$V }
HHWB_QaL ;'}1 n|SsV
public void run() @w,-T@nAW { I@+dE V`Lf //获得文件长度 "]*0)h_ //分割文件 S=krF yFw //实例FileSplitterFetch M `Y~IG} //启动FileSplitterFetch线程 eO(VSjo'` //等待子线程返回
@5acTYQ try{ 9!_`HE+(XJ if(bFirst) Z\(+awv { D
gY2:&0 nFileLength = getFileSize(); ~6kEpa if(nFileLength == -1) R7ZxS { T"in System.err.println("File Length is not known!");
,Ztj } -7'>Rw else if(nFileLength == -2) {{SQL)yJ { '<>pz<c System.err.println("File is not access!"); ,U],Wu) } PM7*@~. else HR\yJt { < I8hy$+6 for(int i=0;i<nStartPos.length;i++) {/XzIOO;b { .FqbX5\p, nStartPos = (long)(i*(nFileLength/nStartPos.length)); !wJ~p:vRdY } 2[r#y1ro for(int i=0;i<nEndPos.length-1;i++) k
U*\Fa*E { 1W$ @ V! nEndPos = nStartPos[i+1]; 8!b#ez } MHI0>QsI nEndPos[nEndPos.length-1] = nFileLength; ~BrERUk } c/x ^I{b* } 6Nj\N oS iKLN !QR UXDd8OJL //启动子线程 (t>BO`, fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; FGzB7w# for(int i=0;i<nStartPos.length;i++) $MfHA~^ { ojT TYR{ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~U~KUL| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), rzLpVpTaz nStartPos,nEndPos,i); Y71io^td~j Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *S:^3{.m= fileSplitterFetch.start(); ;pBSGr9 } &P&M6v+ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Zh{Pzyp siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 80![aj}z4G // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", -%5*c61 nEndPos = " + nFileLength); B r`Xw^S // fileSplitterFetch[nPos.length-1].start(); &h`s:Y [Sg1\UTl &Jk0SUk MP //等待子线程结束 DNLqipUw //int count = 0; s34{\/'D+ //是否结束while循环 pu0IhDMn boolean breakWhile = false; 3-lJ] 7OT }_@*, 9=ns.r while(!bStop) Xb?P'nD { ?`uY*+u write_nPos(); {tOu+zy Utility.sleep(500); R',Q)< breakWhile = true; r[q-O&2& :+bQPzL |XtN\9V. for(int i=0;i<nStartPos.length;i++) !X`
5 { c/^}
=t( if(!fileSplitterFetch.bDownOver) #i%it { Kxn/@@z>u breakWhile = false; |bQKymS break; O B_g:T } q}*(rR9/Br } jdK~]eld= if(breakWhile) )c^Rc9e/ break; K``MS #OqQD6 plh.-" //count++; I
^?TabL //if(count>4) Z[)t34EY" // siteStop(); $k,Z)2 } |j^^*z@ ~-.}]N+([ t:eZ`6o$T\ System.err.println("文件下载结束!"); I+rHb<
P% } _<6
^r catch(Exception e){e.printStackTrace ();} s+#gH@c } IGV @tI Nv,1F [ %cW ?@ //获得文件长度 s{(aW5$!s public long getFileSize() V:fz { =ps3=D int nFileLength = -1; yH|[K=?S[ try{ 9E'fM URL url = new URL(siteInfoBean.getSSiteURL()); e=<knKc
Q HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); GPONCL8(0 httpConnection.setRequestProperty("User-Agent","NetFox"); E2 Q[ {pH{SRM)B /x c<& int responseCode=httpConnection.getResponseCode(); 0M7Or)qN if(responseCode>=400) $5yH(Z[[ { )e d5~ok processErrorCode(responseCode); H!?Av$h` return -2; //-2 represent access is error jVC`38| } 5=WzKM 12`q9Io" 'W(+rTFf! String sHeader; cfBq/2I
AyKvh V7[6jWgH for(int i=1;;i++) E
( { 0x7F~%%2 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); V(I!HT5.W //Utility.log(in.readLine()); [=7=zV;}4 sHeader=httpConnection.getHeaderFieldKey(i); Jr$,w7tQn@ if(sHeader!=null) PIR#M(' { tJ>%Xop if(sHeader.equals("Content-Length")) N:?UA { ]VtVw^ ir nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); mk(O..)2 break; Y~gDS^8 } d[E~}Dq3# } #?\$*@O else N[~{'i break; Xb?:dlu3 } $&&mGD;?K } dn(I$K8 catch(IOException e){e.printStackTrace ();} H=Scrvfx catch(Exception e){e.printStackTrace ();} m?'H7cFR )hs"P%Zg 6_]-&&Nr Utility.log(nFileLength); 4Vl_vTz{i sL" h @ol=gBU return nFileLength; I
L]uw } @32~#0a pRWEBd1U $mdmuUIy-3 //保存下载信息(文件指针位置) *j5>2-C & private void write_nPos() %:2EoXN" { q.0Evr: try{ !~Vo'ykwx' output = new DataOutputStream(new FileOutputStream(tmpFile)); i[_(0P+Da output.writeInt(nStartPos.length); yMaU`z for(int i=0;i<nStartPos.length;i++) f++MH]I; { p)6!GdT // output.writeLong(nPos); 701a%Jq_2 output.writeLong(fileSplitterFetch.nStartPos); 1P4cBw% output.writeLong(fileSplitterFetch.nEndPos); ).U\,@[A{ } ^j]"!:h output.close(); Geyy!sr`` } B7PkCS&X catch(IOException e){e.printStackTrace ();} \|e>(h!l; catch(Exception e){e.printStackTrace ();} 1 aWzd[i } $J6 Pv
PD #9Z=Hj Dl=9<:6FW //读取保存的下载信息(文件指针位置) "NEg]LB5 private void read_nPos() 8T6LD { !dnCrR try{ g)0>J DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); YnM&t
;TX int nCount = input.readInt(); w-iu/|} nStartPos = new long[nCount]; X$*MxMNs nEndPos = new long[nCount]; Pq\
`0/4_ for(int i=0;i<nStartPos.length;i++) L\0;)eJ#M { LLy w9y1 nStartPos = input.readLong(); %+ln_lgD: nEndPos = input.readLong(); aa|u*afWQ } UWU(6J|Fk input.close(); ] V|hDU=t } xgDd5`W catch(IOException e){e.printStackTrace ();} 7~b=G catch(Exception e){e.printStackTrace ();} <PLQY } J)7\k$ D p7{2/mj pK` 1pfih private void processErrorCode(int nErrorCode) WX"iDz. { #(@!:f1 System.err.println("Error Code : " + nErrorCode); Ov$>CA } |Gp!#D0b Fl0(n #L -e_91WI //停止文件下载 *Bfo"["0. public void siteStop() cp1-eR_& { f^JiaU4 [ bStop = true; ),{v for(int i=0;i<nStartPos.length;i++) r ^=rs!f@ fileSplitterFetch.splitterStop(); 7bV(eV k1lo{jw` NS<C"O } :1*q}R } vCvjb\S //负责部分文件的抓取 *y+N-uq **FileSplitterFetch.java ;X_bDiG$ */ yq H package NetFox; m:}PVJ-" 7e NLs
mM9a T0_w import java.io.*; \;XDPC j import java.net.*; ./]xn .7K)' j_I[k8z public class FileSplitterFetch extends Thread { In[rxT~K}Q WCNycH+1 -L-#-dK' String sURL; //File URL Ky0}phGRu long nStartPos; //File Snippet Start Position 2xLEB& long nEndPos; //File Snippet End Position ^VC/tJ int nThreadID; //Thread's ID 45.<eWH$*( boolean bDownOver = false; //Downing is over !S.O~Kq boolean bStop = false; //Stop identical
]z5k YU& FileAccessI fileAccessI = null; //File Access interface 8H'ybfed 3_ bE12 O]4v\~@-j public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException SND@#?hiO { sLKk1A this.sURL = sURL; 2jf73$F this.nStartPos = nStart; L<XAvg this.nEndPos = nEnd; p<
Y-b,& nThreadID = id; W
[*Go fileAccessI = new FileAccessI(sName,nStartPos);//定位 4,,DA2^! } QdIx@[+WOq i)iK0g"2 vAh'6Ob7r public void run() mjQZ"h0 { 6i+<0b}!/ while(nStartPos < nEndPos && !bStop) a}e GB + { Z~0TO-Q lRk_<A mEm=SpO[$o try{ XE>w& URL url = new URL(sURL); ~'V&[]nh8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0
k.\o"y httpConnection.setRequestProperty("User-Agent","NetFox"); A"e4w? String sProperty = "bytes="+nStartPos+"-"; +>&i]x(b httpConnection.setRequestProperty("RANGE",sProperty); YdZ9##IU3 Utility.log(sProperty); y
Nc@K| jn
5v eJ*u]GH U InputStream input = httpConnection.getInputStream(); t$Bu<frQ //logResponseHead(httpConnection); `q9n`h1 eMV{rFmT |oWl9j]Z byte[] b = new byte[1024]; >'lv Zt int nRead; xfF;u9$; while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) wBWqibY| { 7|HIl= nStartPos += fileAccessI.write(b,0,nRead); vbD"" //if(nThreadID == 1) _Sg "|g // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); gSa !zQN6 } {#.<hPXn Gx7bV}&PN eB&.keO
Utility.log("Thread " + nThreadID + " is over!"); qfkdQ/fP bDownOver = true; y7t'I.E[+ //nPos = fileAccessI.write (b,0,nRead); \0W0 o5c$ } GlHP`&;UH catch(Exception e){e.printStackTrace ();} +/[L-&, } x?UAj8z6 } *rgF[
: y6dQ4Whv& -Qn l)JB //打印回应的头信息 )Q 5 x% public void logResponseHead(HttpURLConnection con) dWx@<(`OC { VA>0Y for(int i=1;;i++) HUAbq } { t~H0Qeb[v= String header=con.getHeaderFieldKey(i); '3w%K+eJY if(header!=null) YV8PybThc //responseHeaders.put(header,httpConnection.getHeaderField(header)); #bJp)&LO Utility.log(header+" : "+con.getHeaderField(header)); \@Gcx}Y8h else MK- +[K break; !|W.YbS } nC%<BatQ } hx*4xF p"FWAC! EKD#s,(V*X public void splitterStop() xk { 3RX9LJGX bStop = true; TCFr-*x } K5rra%a-7 P5H_iH `g_r<EY8/ } m^\&v0 A/"<o5(T(P Y_}_)nE@m /* J)^F **FileAccess.java 9[`c"Pd *//文件访问(定位,写)
0~z`>#W, package NetFox; ]WzeJ"r {3 import java.io.*; ^9`|QF o[1#)& Q 5hOVD% public class FileAccessI implements Serializable{ jJaMkF;f Dpwqg3,
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 #K`0b$ RandomAccessFile oSavedFile; V%{WH} long nPos; ek. @ 0c {+ Ibi{ 0~EGrEt public FileAccessI() throws IOException E]v]fy" { /N({"G' this("",0); !g`I*ZE+e } w=CzPNRHH! q'/o=De o%f:BJS public FileAccessI(String sName,long nPos) throws IOException v`c;1 ?=,q { h-//v~V) oSavedFile = new RandomAccessFile(sName,"rw"); uts>4r>+ this.nPos = nPos; +0 }_X oSavedFile.seek(nPos); @( \R@`# } f ~*7hv\ `dD_"Hdt '=O1n H< public synchronized int write(byte[] b,int nStart,int nLen) 8{]nS8i { +~BP~ int n = -1; 7x=4P|(\} try{ 0l4f%'f oSavedFile.write(b,nStart,nLen); CPL,QVO9 n = nLen; &S`g& } dF09_nw catch(IOException e) i6A9|G$H { a'`?kBK7`U e.printStackTrace (); Ch3MwM5] } 9=j)g ByuBZ!m &XdTY + return n; *7-rm } '
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%ok } %.D!J",\/K liG|#ny{ sa&`CEa /* xkw=os **SiteInfoBean.java dA (n,@{ */ z;dRzwL package NetFox; -%]1q#C>@ rQ_]%ies8 PqL.^ public class SiteInfoBean { Qclq^|O0 Y8^WuN$ _G-y{D_S& private String sSiteURL; //Site's URL RjH68=n private String sFilePath; //Saved File's Path t1 U+7nM private String sFileName; //Saved File's Name K9.Gjw private int nSplitter; //Count of Splited Downloading File \K~wsu/?` MoQ\~/Z| <YtjE!2 public SiteInfoBean() F~qZIggD {//nSplitter的缺省值为5 J^ewG //default value of nSplitter is 5 %k32:qe this("","","",5); AD^I1]2f } oPF]]Imu 5y 5Dn!` utBrH public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Ef?hkq7X< { 7)Vbp--b# sSiteURL= sURL; a;^lOU|L{ sFilePath = sPath; g`Cv[Pq?at sFileName = sName; 0MroHFh9` this.nSplitter = nSpiltter; uoOUgNwGg ;@Fb>lBhX 4p-"1 c$ } `Fo/RZOW AoOA.t6RVo d@1^U9sf public String getSSiteURL() 0IdA!.| { H8[A*uYL
return sSiteURL; oSmETk\ } jwAYlnQ^EM ,OubKcNg <qpzs@ public void setSSiteURL(String value) r8eJ&-Yi{Z { X[r0$yuE sSiteURL = value; ZAU#^bEQB } kE.4 # TwI s_r: #=S^i[K/ public String getSFilePath() T]Ai{@i { 'sH_^{V2 return sFilePath; S4 Uu/EX6S } c`p'5qz <$zhNu~ 7L6L{~8
W public void setSFilePath(String value) A"&<$5Q { (DY[OIHI sFilePath = value; Xpn\TD<_I } ;5.&TQT xlJWCA*> bKGX>
%- public String getSFileName() H!Q72tyo { ZK'46lh return sFileName; CX{6 } o h\$u5 Tn1V+) bTrusSAl public void setSFileName(String value) <7F-WR/2n { dH;2OWM sFileName = value; AQ@)' } $.,B2} ' hEu_mw# qf\W,SM public int getNSplitter() [bP^RY: { eBnx$ return nSplitter; tx>7?e8E } 6(d6Uwc` <A8>To< 6V]m0{:E public void setNSplitter(int nCount) :,aY|2si { zA>X+JH>iw nSplitter = nCount; !|xB>d
q? } t~j6w sx; } `3i>e<m~ <MkvlLu((o ~Ay)kv; /* HrvyI)4{ **Utility.java }URdoTOvb */ EG3,TuDH8 package NetFox; <6Gs0\JB >h;]rMD!| :tU^ public class Utility { 4k@n5JNa >d
p/ reh{jMC public Utility() Dk^AnMx%_ { dGBjV #bNT e~zgH\` `HQ)][ } mLZ1u\7W G@`F{l //线程睡眠 X\P%C public static void sleep(int nSecond) -i2rcH { b|Emu!9U
try{ |_TI/i>?' Thread.sleep(nSecond); px K&aY8 } "nu]3zcd catch(Exception e) sb{K%xi% { zG6l8%q'UE e.printStackTrace (); !9_(y~g{N } "4\ } 7[;!e nO {sC Ni //日志 mW%8`$rVEO public static void log(String sMsg) F6[F~^9D { uW!XzX[' System.err.println(sMsg); MmjZq } e6j1Fa9 #Z2'Y[@. ?QT6q]|d0+ public static void log(int sMsg) J@I>m N1\ { N, Ma\D+^t System.err.println(sMsg); ErK1j } f_S$CFa@ } 6Bjo9,L }OAU5P!rp CZ3oX#b /* >z\IO **TestMethod.java C(G.yd */ p!YK~cH[ package NetFox; zx}+Q B0 5U475& k9rws public class TestMethod { HD=F2p baII!ks hYkkr& public TestMethod() =Z:]% { ///xx/weblogic60b2_win.exe w g?}c ;
try{ (46'#E z[F SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); $3HqVqF^R //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ,]2?S5R SiteFileFetch fileFetch = new SiteFileFetch(bean); = ){G fileFetch.start(); uxU-N } cWkg.ri-x catch(Exception e){e.printStackTrace ();} 1WMZ$vsQUb 'OtTq8G fAULuF } -`k>(\Q<d 9BtGzI\ b}R_@_<u public static void main(String[] args) 8{G!OBxc\. { X#&5?oq` new TestMethod(); 5eori8gr7 } rV%68x9 } Vpnk>GWD 点击下载更多相关资料
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