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/* X; I:i%- **SiteFileFetch.java mk(O..)2 */ DDxbIkt package NetFox; `%IzW2v6 import java.io.*; BgRfy2: import java.net.*; f4UnLig _0N=~`' _1Iy /T@1 public class SiteFileFetch extends Thread { a\;1%2a }(k#,&Fv` v%v(-, _q SiteInfoBean siteInfoBean = null; //文件信息Bean O#LG$Y
n* long[] nStartPos; //开始位置 Oxo?\
:T long[] nEndPos; //结束位置 Y )#x(s?t FileSplitterFetch[] fileSplitterFetch; //子线程对象 O<7Q>m long nFileLength; //文件长度 cq lA"Eof boolean bFirst = true; //是否第一次取文件 4wYD-MB boolean bStop = false; //停止标志 -FQ! File tmpFile; //文件下载的临时信息 R=
,jqW< DataOutputStream output; //输出到文件的输出流 %LyZaU_sB h1}U#XV //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) qTSyy= public SiteFileFetch(SiteInfoBean bean) throws IOException Hdvtgss! { p]h;M siteInfoBean = bean; W>f q 9 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); f@S n1c,Mk tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 4'3do>! if(tmpFile.exists ()) W*J_PL9j { dbn9t7'{ bFirst = false; gJa48 pi read_nPos(); U*sjv6*T } mJ+M|#Ox else eTg8I/)%B { 7~b=G nStartPos = new long[bean.getNSplitter()]; }9:(l nEndPos = new long[bean.getNSplitter()]; p7{2/mj } (=A61]yB &T.d"i *JnY0xP hcn$uyP } /x%h@Cn! -e_91WI L
hp public void run() `iHyGfm { q+iG:B /Z //获得文件长度 NS<C"O //分割文件 bG0
|+k3O //实例FileSplitterFetch TxJoN]Z. //启动FileSplitterFetch线程 m:}PVJ-" //等待子线程返回 yMG(FAyu try{ * 'eE[/K if(bFirst) Q};n%&n& { 5)5$h]Nz> nFileLength = getFileSize(); mpr_AL!ZO~ if(nFileLength == -1) *wk?{ U { 1Kjqs)p^ System.err.println("File Length is not known!"); # &,W x } ^C=dq(i=[ else if(nFileLength == -2) jJY{np { ZLjEH7 System.err.println("File is not access!"); ?"F9~vx&G } ag V z
else p<
Y-b,& { reQr=OAez for(int i=0;i<nStartPos.length;i++) ,.kJF4s& { qX[{_$^Q nStartPos = (long)(i*(nFileLength/nStartPos.length)); a8WWFAC[ } ~dO+kD for(int i=0;i<nEndPos.length-1;i++) d*YVk{s7V { (ZPl~ZO nEndPos = nStartPos[i+1]; Ypx5:gm|J } lw]uH<v nEndPos[nEndPos.length-1] = nFileLength; 1[yy/v'q } +\doF } z''ejq xTU;rJV HNRAtRvnY //启动子线程 |oWl9j]Z fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; MY60% for(int i=0;i<nStartPos.length;i++) +v2)'?BS { T@Bu Fr`]< fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), E<ILZpP siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), $>8O2p7W nStartPos,nEndPos,i); w%?Zb[!& Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (@ 1>G
^% fileSplitterFetch.start(); 2 \<u;9 } %[4u #G` // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), s{Og3qUy siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); y6dQ4Whv& // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", {Rdh4ZKh nEndPos = " + nFileLength); g~ii^[W // fileSplitterFetch[nPos.length-1].start(); !kG |BJ$j ih|;H:"^
Y( //等待子线程结束 uHsLlfTn //int count = 0; o}&{Y2!x //是否结束while循环 nC%<BatQ boolean breakWhile = false; Pl. y9g~ 4ClSl#X#i EKD#s,(V*X while(!bStop) MgP&9 { S
n<X write_nPos(); y"Pd>61h Utility.sleep(500); Rt5,/Q0 breakWhile = true; 1:iB1TclP NBXhcfF =:Yrb2gP_\ for(int i=0;i<nStartPos.length;i++) 1 0zw}1x { mrq,kwM if(!fileSplitterFetch.bDownOver) [7Q%c!e$ * { gKY6S? breakWhile = false; Uqz.Q\A break; @tJ4^<`P{ } JljCI@ } 0~EGrEt if(breakWhile) t 9t
'9 break; c|d,:u# Qcks:|5 <@# g2b //count++; h-//v~V) //if(count>4) HYmUD74FR // siteStop(); z`YC3_d } tUuARo7# L
}3eZ- +~BP~ System.err.println("文件下载结束!"); 6uv~.-T<l } ,a?oGi catch(Exception e){e.printStackTrace ();} Q)y5'u qZ } -Bl^TT sYo&@~T AN6Q~%, //获得文件长度 MRw4?HqB public long getFileSize() _Rb2jq(&0 { q2r$j\L% int nFileLength = -1; RJUIB try{ $}r.fji,c URL url = new URL(siteInfoBean.getSSiteURL()); j>e RV ol HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); BVj(Q}f8 httpConnection.setRequestProperty("User-Agent","NetFox"); o<iU;15 O_ZYm{T[7 $=Ns7Sbup int responseCode=httpConnection.getResponseCode(); 6bc\
)n` if(responseCode>=400) .j &# { u#rbc" processErrorCode(responseCode); _G-y{D_S& return -2; //-2 represent access is error
BdiV } AC'_#nPL# *Ti"8^`6 -Ci&h String sHeader; 83I 5n&) cC>Svf[CzK oPF]]Imu for(int i=1;;i++) }IZw6KiN { P$0c{B4I //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); hd i0YL //Utility.log(in.readLine()); i7 21(1 sHeader=httpConnection.getHeaderFieldKey(i); 0MroHFh9` if(sHeader!=null) ~@Q]@8Tv\ { Vs{\ YfF if(sHeader.equals("Content-Length")) 8Z_ 4%vUBg { :b(W&iBWhI nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); |6b~c{bt break; oQ,<Yx%E3 } )qw;KG0F } <qpzs@ else DpvHIE:W break; 3 (\D.Z } 9]w?mHslE } '7PaJj=Nx catch(IOException e){e.printStackTrace ();} {+7FBdxVB
catch(Exception e){e.printStackTrace ();} !&hqj$>-} c`p'5qz :>;F4gGVG Utility.log(nFileLength); E/a2b(,Tg +)WU:aKI A] 'jsv!+ return nFileLength; w(aHB8T } ;m#4Q6k)V? ;aWk- Vc;[ 0iB //保存下载信息(文件指针位置) =t)qy5 private void write_nPos() ,0,FzxX0! { aK
-x{ try{ rvy%8%e? output = new DataOutputStream(new FileOutputStream(tmpFile)); RU4X#gP4Vh output.writeInt(nStartPos.length); Jj+Q2D: for(int i=0;i<nStartPos.length;i++) ?YS>_MN { rG6G~|mS // output.writeLong(nPos); 6Q [ output.writeLong(fileSplitterFetch.nStartPos); nL/]Q'(5 output.writeLong(fileSplitterFetch.nEndPos); zA>X+JH>iw } =hFY-~U output.close(); \q1tT!] } w/ rQOHV{ catch(IOException e){e.printStackTrace ();} HrvyI)4{ catch(Exception e){e.printStackTrace ();} ~[t#$2d} } cI\[)5& A|
A#|D X:g5;NT //读取保存的下载信息(文件指针位置) aMhVO(+FW private void read_nPos() Dk^AnMx%_ { Wy7w zt try{ `HQ)][ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); XyE$0i~t int nCount = input.readInt(); zU~ Ff"< nStartPos = new long[nCount]; [QgP6f]= nEndPos = new long[nCount]; 6d6cZGS[: for(int i=0;i<nStartPos.length;i++) VnsV&cx { b-VygLN nStartPos = input.readLong(); d7vPZ_j^z nEndPos = input.readLong(); [5?Dov^j3 } e7@ m i input.close(); %5gdLm!p } oc( '!c catch(IOException e){e.printStackTrace ();} ^%9oeT{ catch(Exception e){e.printStackTrace ();} n>q!m@ }< } fF0i^E< Q*>)W{H&) "Bf8mEmp private void processErrorCode(int nErrorCode) b+|Jw\k { r9_ ON| System.err.println("Error Code : " + nErrorCode); C(G.yd } >[;@
[4} 1 6zxPSTr} `-pwP //停止文件下载 /"g Ryv public void siteStop() =Z:]% { ?/3wO/7[ bStop = true; $3HqVqF^R for(int i=0;i<nStartPos.length;i++) B&a{,.m&q6 fileSplitterFetch.splitterStop(); 0AQ4:KV(Y 5 qfvHQ ~M 'OtTq8G } 3s!6rT_=)d } 9BtGzI\ //负责部分文件的抓取 Hloe7+5UD **FileSplitterFetch.java N ^rpPq */ !+PrgIp> package NetFox; rc8HZ ~{Iw[,MJ .A< HM} import java.io.*; kuH%aM<R import java.net.*; <J;O$S jV sH ]XEyG7D public class FileSplitterFetch extends Thread { HqWWWCWal F6q=W#~ I_ZJnu< String sURL; //File URL &}p\&4 long nStartPos; //File Snippet Start Position ]%6%rq%9C long nEndPos; //File Snippet End Position f 3H uT=n int nThreadID; //Thread's ID caQ1SV^{9 boolean bDownOver = false; //Downing is over #H~55 ))F boolean bStop = false; //Stop identical \|Af26 FileAccessI fileAccessI = null; //File Access interface ;O hQBAC #7 O7O~
BjH|E@z public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException |M7C=z=' { }h;Z_XF& this.sURL = sURL; 8UjIC4' this.nStartPos = nStart; %Y ZCdS this.nEndPos = nEnd; K:U=Y$ x nThreadID = id; NRx 7S9W fileAccessI = new FileAccessI(sName,nStartPos);//定位 ;I*t5{ } \7LL neq MM32\}Y6 ~%*l>GkP* public void run() #-B<u- { PL=v,NB while(nStartPos < nEndPos && !bStop) RkG?R3e { )W\)kDh! E^rBs2;9 6n2RT H try{ I'P|:XKI URL url = new URL(sURL); Hi[lN7ma8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); oi0O4J%H httpConnection.setRequestProperty("User-Agent","NetFox"); e W8cI)wU String sProperty = "bytes="+nStartPos+"-"; {Ycgq%1>] httpConnection.setRequestProperty("RANGE",sProperty); Lmjd,t Utility.log(sProperty); MlWKfe< jF;<9-m& k H65k ( InputStream input = httpConnection.getInputStream(); 6E) T;R(@ //logResponseHead(httpConnection); %@:>hQ2; 0t!ZMH &;ddnxFI
byte[] b = new byte[1024]; bq7+l4CGTv int nRead; A/=cGE while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) jW#dUKS( { w-WAgAch nStartPos += fileAccessI.write(b,0,nRead); "-S!^h/v //if(nThreadID == 1) 3)VO{Cj! // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); x}a?B } {@KLN< waC i9 &H# l* Utility.log("Thread " + nThreadID + " is over!"); ]Qe~|9I bDownOver = true; TQeIAy //nPos = fileAccessI.write (b,0,nRead); 6'*6tS } E*)A!2rlK catch(Exception e){e.printStackTrace ();} O8hx}dOjA } aEdMZ+P. } .nIGs'P ,Z|O y|+' ,eebO~7vB //打印回应的头信息 qX5]\nX&G public void logResponseHead(HttpURLConnection con) _RcEfT
{ rMG[,:V for(int i=1;;i++) <*iFVjSI( {
}kAE String header=con.getHeaderFieldKey(i); 0e>?!Z
E if(header!=null) A["6dbvv //responseHeaders.put(header,httpConnection.getHeaderField(header)); &z3_N Utility.log(header+" : "+con.getHeaderField(header)); FBP #_"z else r8R7@S2V' break; :Dr4?6hdr } >*/
|tL } )+G0m,n >.39OQ# uR")@Tc public void splitterStop() 7g8\q@', { vIi&D; bStop = true; i]zh8|"> } U#Kw+slM +:#g6(P] 4myikeUR_ } 9[{q5 #/(L.5d[ p^{yA"MQ /* S%
ptG$Z **FileAccess.java T8LvdzS *//文件访问(定位,写) /;TD n>lq package NetFox; ZnbpIJ8cV import java.io.*; L(y~
,Kc KPK`C0mg@k |[V6R\l39 public class FileAccessI implements Serializable{ UQ e1rf K=sk1<>)m //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 M;-FW5O't RandomAccessFile oSavedFile; ,=ju^_^sA long nPos; ;h~k B u 8~5e y(Pv1=e public FileAccessI() throws IOException ^SUo-N'' { &@&^k$du8q this("",0); 0,LUi*10 } IxlPpS9Wx $iy(+} Y^?PHz'Go public FileAccessI(String sName,long nPos) throws IOException /{ 8 .Jcx$ { fb]=MoiJ oSavedFile = new RandomAccessFile(sName,"rw"); z_&T>ME this.nPos = nPos; ^^Q>AfTR. oSavedFile.seek(nPos); 1kc{`oL } .fzns20u WdrMp z\IZ5' public synchronized int write(byte[] b,int nStart,int nLen)
2IDn4<` { #
WL5p. int n = -1; 7sJGB^vM try{ kb*b|pWlO oSavedFile.write(b,nStart,nLen); 3V/|" R2s n = nLen; 0c#|LF_ } DVbY catch(IOException e) wB*}XJah { 0vz!) e.printStackTrace (); ;xE1#ZT } }Tk*?tYt B{_-k Q mz3GH@wg return n; s[/)v: } Bk4|ik} yH@2nAn ViG-tb } O%s?64^U cp 7;~i3 YcuHYf5 /* cA
B^]j **SiteInfoBean.java ~M J3-<I */ hrnY0 package NetFox; N%8aLD \E:l
E/y v%2Jm!i+ public class SiteInfoBean { 8J#TP7; ;hU~nj+{ FkIT/H private String sSiteURL; //Site's URL /T/7O private String sFilePath; //Saved File's Path h`p9H2}0 private String sFileName; //Saved File's Name c:z<8#A} private int nSplitter; //Count of Splited Downloading File Xc@%_6 p[gq^5WuC Uv/?/;si public SiteInfoBean() u'EzYJ7 {//nSplitter的缺省值为5 s av //default value of nSplitter is 5 \rf2Os this("","","",5); 8Ow0A } qw%wyj7 H;eOrX{GT 5U&?P public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) W_N!f=HW { ^c]lEo sSiteURL= sURL; p=U5qM.O sFilePath = sPath; rY&Y58./ sFileName = sName; vErlh:~e this.nSplitter = nSpiltter; (|<.7K N T8rf+B/.L qy|si4IU8, } -( ,iwFb KFMEY\ 6\h Syj7K*,%bZ public String getSSiteURL() Z}'"c9oB { +'!vm6 return sSiteURL; j8Csnm0 } i.`RQZ$,/ (Q09$ HJu;4O($ public void setSSiteURL(String value) v(tr:[V { U$(AZ|0
sSiteURL = value; Z,osdF } hd}"%9p [8QE}TFic %v(\;&@ public String getSFilePath() _:tisr{ { aBLE:v return sFilePath; "ujt:4p@ } l1qWl `cgSyRD] IuQY~! public void setSFilePath(String value) n3kYVAgF { c|'hs sFilePath = value; tCdgtZm } Dab1^H!KT "K8<X EI29; public String getSFileName() wb
}W;C@ { 3Yd)Fm return sFileName; i+V4_` } Rz!E=1Y$ e>kw>%3bl9 t3 q0|S public void setSFileName(String value) =y/VrF.bV { r$*p sFileName = value; <,Zk9 t& } ;Vad| - "yI)F~A 46dh@&U public int getNSplitter() `q
4% { @,-xaZ[ return nSplitter; Iky'x[p,D } uSs~P%@6| ^6~CA [Uezi1I public void setNSplitter(int nCount) Ve&(izIh { tF)aNtX4^ nSplitter = nCount; J0}OmNTzD } :G|Jcl=r } mB$r>G/' l|fOi A*K '(kySf[ /* EY(@R2~#J **Utility.java Nvs8t% */ C,w$)x5kls package NetFox; tLpDIA_8 bgd1j,PWbW )#r]x1[Kn public class Utility { G1Cn[F;e v!ULErs "6n~,$ public Utility() 3_IuK6K2 { ;""V s6 :JqH.Sqk g[j"]~ } +"a .,-f! !h2ZrT9
_ //线程睡眠 @R?S-*o public static void sleep(int nSecond) s} ,p>8 { fw_V'l#\ try{ gQ*0Mk Thread.sleep(nSecond); (?&X<=|" } \{n]&IjA catch(Exception e) Y*0%lq({H { oa+Rr&t' e.printStackTrace (); :t]YPt } =_8 } 5 %q26& ?T70C9 //日志 }(dhXOf\q public static void log(String sMsg) Q5iuK#/ { W z3y+I/& System.err.println(sMsg); jGd{*4{3+ } G6Z2[Ej1 7[:9vY 'rU
[V+ public static void log(int sMsg) $r9Sn { j"/i+r{"E System.err.println(sMsg); o8RagSIo8 } 4W~pAruwr } J
\1&3r|R 6Ez}A|i _;{n+i[ /* {Os$Uui37\ **TestMethod.java VLc=!W} */ O(h4;'/E package NetFox; DTt/nmKAqJ >"B95$x5 t*82^KDU public class TestMethod { Txfu%'2)e d5%A64? +o!".Hp public TestMethod() 0eQyzn*98 { ///xx/weblogic60b2_win.exe 6YQ&+4 try{ 1Qtojph SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); fEWS3`Yy //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); r@H<@Vuc SiteFileFetch fileFetch = new SiteFileFetch(bean); EMmNlj6 fileFetch.start(); MSoLx' < } M$
`b$il catch(Exception e){e.printStackTrace ();} $VhUZGuG> "CB* j\("d4n%C } h2zuPgz, YL=?N k/ Ti!j public static void main(String[] args) OOGqtA; { kz(%8qi8& new TestMethod(); Ajr]&H4 } M ZB0vdx } +g<2t, 点击下载更多相关资料
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