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/* A7|CG[wZ **SiteFileFetch.java 7q%<JZPY */ L<GF1I) package NetFox; e@Cv')]B import java.io.*; f&z@J,_= import java.net.*; \]@XY_21 'dkKBLsx r)9&'m .: public class SiteFileFetch extends Thread { WcG!6.U> fV 6$YCf eU[f6OGqC SiteInfoBean siteInfoBean = null; //文件信息Bean aJQx"6c? long[] nStartPos; //开始位置 p "J^ long[] nEndPos; //结束位置 \R m2c8Z2 FileSplitterFetch[] fileSplitterFetch; //子线程对象 ?Re6oLm<B long nFileLength; //文件长度 hI&ugdf boolean bFirst = true; //是否第一次取文件 1XwW4cZ>: boolean bStop = false; //停止标志 5BztOYn, File tmpFile; //文件下载的临时信息 $p(,Qz(.8 DataOutputStream output; //输出到文件的输出流 l'pu?TP{a 3!+N}[$iy //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) @[:JQ'R= public SiteFileFetch(SiteInfoBean bean) throws IOException V_>)m3zsL { # 1S*}Q<k siteInfoBean = bean; aMUy^>
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 0:,8Ce tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); I6k S1 if(tmpFile.exists ()) M-K.[}}-d { JTK0#+? bFirst = false; 9PU9BYBG read_nPos(); ]~')OSjw } Mp8FYPjZ else <Z$r\Huf { -w0U}Te^ nStartPos = new long[bean.getNSplitter()]; gypE~@ nEndPos = new long[bean.getNSplitter()]; ;yc|=I^ } oAMB}a; x[ sSM: DgJG: D{ 1 z4s1Y } :;wb{q$O ndsu}:my qkM<t?uS public void run() R)%1GG4 { M"E ]r=1 //获得文件长度 *zf@J' //分割文件 AADvk_R //实例FileSplitterFetch L$ nFRl& //启动FileSplitterFetch线程 SO}$96 //等待子线程返回 97$1na3gq try{ # j=r if(bFirst) L5"|RI} { mXX9Aa> nFileLength = getFileSize(); qep<7 QO if(nFileLength == -1) L4)@lmd3 { OMr &f8 System.err.println("File Length is not known!");
Tl.%7) } OT&mNE4 else if(nFileLength == -2) *@M7J { GM5s~, System.err.println("File is not access!"); `&)khxT/ } x8]9Xe:_>O else /K#t$O4 { _` %z for(int i=0;i<nStartPos.length;i++) {kLL&`ii { l
)hg!( nStartPos = (long)(i*(nFileLength/nStartPos.length)); 8:BPXdiK } :QSCky*i for(int i=0;i<nEndPos.length-1;i++) /r4QDwu { (z[|\6O nEndPos = nStartPos[i+1]; +sTZ)
5vQ } #>SvYP nEndPos[nEndPos.length-1] = nFileLength; :Kc}R)6 } .K`^n\T
t } Vx]{<}(gr qR
WWG& $X.X_ //启动子线程 }y-b<J?H fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 39W"G7n?v for(int i=0;i<nStartPos.length;i++) iU5Aj:U3 { k$V.hG|6M fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), '`$US;5 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), a r0y8>]3 nStartPos,nEndPos,i); #j_<iy Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); y;N[#hY#CD fileSplitterFetch.start(); bDLPA27 } w[>/(R7im // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), E(i<3U"4h[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); >Q0HqOq // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ^]He]FW':G nEndPos = " + nFileLength); l
vuoVINEp // fileSplitterFetch[nPos.length-1].start(); *"N756Cj 1D
/{Y mdu5aL //等待子线程结束 8^3Z]=(Q //int count = 0; MQR@(>TZy //是否结束while循环 DrD68$,QN boolean breakWhile = false; mQQ5>0^m `(|jm$Q @_&@M~ u while(!bStop) )v!>U<eprD { `TBI{q[y write_nPos(); +DwyMzeE Utility.sleep(500); .P[
%t=W breakWhile = true; Xa._ +zpmy3Q W
s!N%%g for(int i=0;i<nStartPos.length;i++) /J8'mCuC. { `[JX}<~i if(!fileSplitterFetch.bDownOver) %DAF26t { u$c)B<.UR breakWhile = false; ?XVJ$nzW break; kve{CO* } 2}P<}-?6 } $x&\9CRM if(breakWhile) wL]7d3t break; A*ImruV eATX8`W pIh%5ZU //count++; Aj06"ep //if(count>4) 4'pg>;*. // siteStop(); %2=nS<kC } L3M]06y pQaP9Y{OK 'J^E|1P System.err.println("文件下载结束!"); Y?Yix } ^Bihm] Aq catch(Exception e){e.printStackTrace ();} `vJ+sRf } %Uk]e5Hu dB7E&"f h 5Y3
v //获得文件长度 8Ua;< h% public long getFileSize() 'z\K0 { zV {[0s int nFileLength = -1; { U a19~'> try{ 9V&%_.Z URL url = new URL(siteInfoBean.getSSiteURL()); \[&~.B HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); .IYE+XzV httpConnection.setRequestProperty("User-Agent","NetFox"); 2 @g'3M vv,OBL~{ zO`54^ int responseCode=httpConnection.getResponseCode(); Fl GKy9k if(responseCode>=400) fG O.wb { \HFh?3-g processErrorCode(responseCode); 28M!G~| return -2; //-2 represent access is error hM2^[8 } 95giqQ(N dX0A(6 >G<AyS&z* String sHeader; xKz^J
SF a3]'%kKp "V:B-q for(int i=1;;i++) +`Bm { [Dp 6q~RM //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); @)iv' //Utility.log(in.readLine()); Ftj3`Mu sHeader=httpConnection.getHeaderFieldKey(i); +ib72j%A if(sHeader!=null) & v=2u,]T { pLL
^R if(sHeader.equals("Content-Length")) kEWC { pdsjX)O+f nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); NMY~f (x break; +\9Y;Ny } 5nzkZw } f+Nq?GvwBQ else yB(^t`)}N break; o9~ Z! &p } sj003jeko } ptGM' catch(IOException e){e.printStackTrace ();} ^r73(8{) catch(Exception e){e.printStackTrace ();} P5Ms
X~mT hRSRz5 J} VN|P(S6 Utility.log(nFileLength); OUn,URI oT$w14b ZVE q{x1Zc return nFileLength; :<Y,^V( } Z<z(;)?c 31k.{dnm Q$G!-y+"i //保存下载信息(文件指针位置) K=VYRY private void write_nPos() 5[[ 4A]#T { mZJ"e,AY try{ Ra[{K@ output = new DataOutputStream(new FileOutputStream(tmpFile)); HS]|s': output.writeInt(nStartPos.length); tlu-zUsi for(int i=0;i<nStartPos.length;i++) )#Ea~>v { FSd842O // output.writeLong(nPos); $/nU0W output.writeLong(fileSplitterFetch.nStartPos); 4&~1|B{Z output.writeLong(fileSplitterFetch.nEndPos); >V@-tT"^: } Uaj8}7v output.close(); >}GtmnF } z'3 catch(IOException e){e.printStackTrace ();} bNp
RGhlV catch(Exception e){e.printStackTrace ();} 6",1JH,;p } 3J~Q pw0< Xa\{WM==; >%x7-->IB //读取保存的下载信息(文件指针位置) f{AbCi private void read_nPos() xRq|W4ay { Y~hBVz2g try{ ?SRG;G1 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); D`,W1Z# int nCount = input.readInt(); ?kX$Y{M} nStartPos = new long[nCount]; |"?0H# nEndPos = new long[nCount]; R8Nr3M9 ) for(int i=0;i<nStartPos.length;i++) L+7L0LbNU { +DaPXZ5. nStartPos = input.readLong(); %fnL nEndPos = input.readLong(); '@i/?rNi%N } 2G<\Wz input.close(); LJ`*&J } 5ycccMx0V catch(IOException e){e.printStackTrace ();} XzgJ@ catch(Exception e){e.printStackTrace ();} 9^QiFgJy } }&Ngh4/ C:xgM'~+ 2Kovvh y# private void processErrorCode(int nErrorCode) BSYJ2 { "VR>nyG% System.err.println("Error Code : " + nErrorCode); kL\
FY } zs:OHEZw vx62u29m .;)7)% //停止文件下载 pSvRyb.K public void siteStop() 0eUK' { S\b[Bq bStop = true; X*hY?'Rp for(int i=0;i<nStartPos.length;i++) '!^5GSP3& fileSplitterFetch.splitterStop(); pyYm<dn / E}L%OvE s9+Rq*Qd } w=H } P|HxD0c^u //负责部分文件的抓取 _ dEc? R} **FileSplitterFetch.java }5
^2g!M */ _b|mSo,{Y package NetFox; 4v9jGwnz t WyciIO1 k%Dpy2uH import java.io.*; no_;^Ou? import java.net.*; p)v|t/7 {2 l35K= /}A"F[5 public class FileSplitterFetch extends Thread { (37dD! z#9Tg"8] "g27|e?y String sURL; //File URL C'$w*^me long nStartPos; //File Snippet Start Position M|8vP53=q long nEndPos; //File Snippet End Position !*Ex}K99 int nThreadID; //Thread's ID VF[$hs boolean bDownOver = false; //Downing is over m#6RJbEz boolean bStop = false; //Stop identical %d?.v_Hu0 FileAccessI fileAccessI = null; //File Access interface 8'XAZSd( 8LuM eGs
`|kW%L4 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException h [*/Tnr { W
D 8 this.sURL = sURL; A1>fNilC9 this.nStartPos = nStart; p GZiADT this.nEndPos = nEnd; (~S=DFsP nThreadID = id; eka<mq|W fileAccessI = new FileAccessI(sName,nStartPos);//定位 {BV0Y.O } }fC= PU8>.9x |m{u]9 public void run() {:=sCY! { P=3mLz- while(nStartPos < nEndPos && !bStop) V[DiN~H { 7:/gO~gI lV%oIf[OB Xz,fjKUnN try{ KXrZ:4bg URL url = new URL(sURL); U80h0t% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;f?suawMv httpConnection.setRequestProperty("User-Agent","NetFox"); KBC?SxJSJc String sProperty = "bytes="+nStartPos+"-"; r=}v`
R& httpConnection.setRequestProperty("RANGE",sProperty); q4MR9ig1E_ Utility.log(sProperty); ohU}ST:9 G0%},Q/ hs^K9Jt InputStream input = httpConnection.getInputStream(); i0}f@pCB?X //logResponseHead(httpConnection); l+nT$IPF 8sus$:Ry X 0vcBHh byte[] b = new byte[1024]; `!( IQ& int nRead; gpw,bV while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) )JrG`CvdU { LWdA3% nStartPos += fileAccessI.write(b,0,nRead); /hN;\Z[@ //if(nThreadID == 1) )FpizoV q0 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); xovsh\s } O!G!Gq& FUVp}>#U X$2f)3 Utility.log("Thread " + nThreadID + " is over!"); OwCbv j0# bDownOver = true; 9Iu"DOxX% //nPos = fileAccessI.write (b,0,nRead); +)hxYLk&I } R53^3"q~ catch(Exception e){e.printStackTrace ();} F| jl=i } ,njlKkFw^Z } )+Y"4?z~ a]/KJn/B( P$x9Z3d_ //打印回应的头信息 Vk> & public void logResponseHead(HttpURLConnection con) PI.Zd1r { L}
"bp for(int i=1;;i++) n)0M1o# { |}? H$d String header=con.getHeaderFieldKey(i); D 0Mxl?S? if(header!=null) }Y^o("c(
//responseHeaders.put(header,httpConnection.getHeaderField(header)); Aydpr_lp Utility.log(header+" : "+con.getHeaderField(header)); WG&! VK else to'CuPkT break; W#+f2 RR } k;B[wEW@ } n2can A`#?Bj OxPl0-]t public void splitterStop() NB4Q,iq$ { * RyU*au bStop = true; L+S)hgUH } t`="2$NO l$Vy\CfK3n :c|Om{; } ^J&D)&"j Wco2i m @ta:9wZ /* h\p!J-V **FileAccess.java c`/VYgcTqB *//文件访问(定位,写) ttdY]+Fj package NetFox; 2i0;b|-= import java.io.*; HUMy\u84H R[14scV Yj'9|4%+| public class FileAccessI implements Serializable{ c~4Cpy^ w\MWr+4 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 B~E">}=! RandomAccessFile oSavedFile; .^M#BAt2 long nPos; ,p3]`MG >DUTmJxv Pro?xY$E) public FileAccessI() throws IOException bf@g*~h@ { =%<,
^2o this("",0); 2F>Y{3& } (c)=Do= Pjk2tf0j` _7\`xU public FileAccessI(String sName,long nPos) throws IOException cE:s\hG { z bYv}q oSavedFile = new RandomAccessFile(sName,"rw"); >I0;MNX this.nPos = nPos; ZM})l9_o" oSavedFile.seek(nPos); ^utOVi } -yB}(69 z]r'8Jc -N% V5 TN public synchronized int write(byte[] b,int nStart,int nLen) faDS!E' + { ,{!,%]bC int n = -1; (_|*&au J try{ Cyd/HTNh< oSavedFile.write(b,nStart,nLen); QK?V^E n = nLen; :Rb\Ca } |,p"<a!+{w catch(IOException e) u {_, S3Aa { ?tY+P`S e.printStackTrace (); 7tXy3-~biz } {QM rgyQE uDie205 ed`"xm return n; I)V=$r{ } !Pw*p*z pdRM%ug Nna.N U1 } JyZuj>`
6 UP^8Yhdo j{OA%G(I /* TG}owG]] **SiteInfoBean.java !nSa4U,$w< */ c 9f"5~ package NetFox; ^T!Zz"/: >lV,K1Z T4]2R public class SiteInfoBean { gMI%!Y #vBrRHuA#" a~7D4G private String sSiteURL; //Site's URL H[u9C:}9b private String sFilePath; //Saved File's Path yuZLsH private String sFileName; //Saved File's Name )]j3-# private int nSplitter; //Count of Splited Downloading File VkFh(Br<{ 9$\s
v5 6?F88;L public SiteInfoBean() DLrV{8%W {//nSplitter的缺省值为5 QcL@3QC //default value of nSplitter is 5 o6MFMA+vi this("","","",5); rP4T;Clout } ;|WUbc6&g qUd7O](b=? Ax&!Nz+? public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) d <}'eBT' { rJ Jx8)M sSiteURL= sURL; oRCc8& sFilePath = sPath; xn3 _ED sFileName = sName; @e)}#kN. this.nSplitter = nSpiltter; $(9QnH1KY ?gMx Vx $;wU Y } XL n9NBT4K R'v~:wNTNs J#..xJ?XRD public String getSSiteURL() @GN2v,WA? { I1fpX | return sSiteURL; 1Z}5ykM3 } "Au4&Fu j9NF| !kE5]<H\ public void setSSiteURL(String value) eB5>uKa { 6j(/uF4!# sSiteURL = value; '3b\d:hN } g,+e3f 2$Mnwxfk j?2~6W/[ public String getSFilePath() N[/<xW~x?4 { Ks%0!X?3q return sFilePath; 1tNL)x"w } jo:Z %4*c/ c6 U>PZ3 public void setSFilePath(String value) LlX)xJ { RM|J |R sFilePath = value; [e+Y7M7 } LL( xi ) -%`~3*L D;Qx9^. public String getSFileName() |owr?tC { _@ao$)q{J return sFileName; 6iU&9Z<% } c| ?(> y*iZ;Bv j =
7y-o public void setSFileName(String value) ~~/,2^ { @Go_5X( sFileName = value; WN'AQ~qA } xOTvrX M|DMoi8x H~j@n!) public int getNSplitter() :'p)xw4K| { 7%^G]AFi return nSplitter; w5m/[Z } =<n ]T; kk=n&M v}$Q public void setNSplitter(int nCount) roS" q~GS, { GY$Rkg6d nSplitter = nCount; IBT>&(cnV } J>_mDcPo } W22S/s 1bV
G%N #kW=|8X /* `jE[Xt"@ **Utility.java ~wa4kS<> */ UdO8KD#r3 package NetFox; y<Koc>8 -N' (2' }WsPu o public class Utility { 07.p
{X R |xB`cSu( ?IGp?R^j" public Utility() 6Ryc&z5 { 84(Jo_9 oKn$g[,SJh s$#64"F } 9~UR(Ts}l f+:iz'b#U //线程睡眠 L~&S<5? public static void sleep(int nSecond) v^&HZk=( { q'jOI_b try{ n5QO'Jr%[ Thread.sleep(nSecond); \m7\}Nbz0/ } uc,>VzdB catch(Exception e) .B`$hxl*0c { ^2'Y=g> e.printStackTrace (); /O[6PG } \92M\S } gclj:7U qJ;~ANwt //日志 T, #-: } public static void log(String sMsg) 12^uu)6Xm, { I{$suPk System.err.println(sMsg); ?62zv[# } ^JY {< RC7F/|w.z |lLe^FM public static void log(int sMsg) EP38Ho=[ { @*hv|zjs System.err.println(sMsg); va@;V+cD } g+o$&'\ } P"7` :a UA.Tp [u #.Dl1L/ /* V_
6K ?~j **TestMethod.java 4<s;xSCL */ <);j5)/ package NetFox; <~|n}& wQ(DX! ~T}D#} public class TestMethod { G:e=9qTf E:rJi] _CNXyFw.7 public TestMethod() "pt[Nm76)8 { ///xx/weblogic60b2_win.exe b#7nt ?`7p try{ MO~T_6 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 5JOfJ$(n //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); .x$V~t SiteFileFetch fileFetch = new SiteFileFetch(bean); y6am(ugE fileFetch.start(); ydD:6bBX } fPJc catch(Exception e){e.printStackTrace ();} -AnJLFY g,E)F90 e[k\VYj[ } @{V`g8P> ~H''RzN =0e>'Iw2 public static void main(String[] args) #p"F$@N { W[QgddR new TestMethod(); ^/2O_C } ++2a xRl } xD7Y"%Pbx 点击下载更多相关资料
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