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/* Y/]J0D **SiteFileFetch.java I/_,24[ */ F0KNkL>&g package NetFox;
(V<pz2\ import java.io.*; @r]1;KG import java.net.*; 1xj w= nJR(lXWO u85?f public class SiteFileFetch extends Thread { f"Kl?IN8 6yK"g7 ~F13}is SiteInfoBean siteInfoBean = null; //文件信息Bean %9b TfX" long[] nStartPos; //开始位置 !~`aEF3 long[] nEndPos; //结束位置 paZcTC FileSplitterFetch[] fileSplitterFetch; //子线程对象 .6A{ long nFileLength; //文件长度 suE#'0K boolean bFirst = true; //是否第一次取文件 g?{7DI` boolean bStop = false; //停止标志 M9Qx F File tmpFile; //文件下载的临时信息 3\j3vcuy DataOutputStream output; //输出到文件的输出流 '@f#GNRT l
9bg //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) PBb'`PV public SiteFileFetch(SiteInfoBean bean) throws IOException \OVw { [E;~Y_l siteInfoBean = bean; ;Swj`'7 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Voo_
? tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); N{?Qkkgx if(tmpFile.exists ()) wpa^]l { VWW(=j bFirst = false;
u"-."_ read_nPos(); ,B$e'KQ } 1i}p?sU else (|sqN8SbA { V"5LNtf nStartPos = new long[bean.getNSplitter()]; &Vbcwv@ nEndPos = new long[bean.getNSplitter()]; &24>9 } ~' q&rvk` <ELqj2`c @T)>akEOt YzYj/,?r } F32U;fp3 0pA>w8 mh }0 =gP?.kE public void run() gsVm)mkd { oB%j3aAH //获得文件长度 M7c53fz //分割文件 `g'z6~c7n //实例FileSplitterFetch
5Eu`1f? //启动FileSplitterFetch线程 EHda //等待子线程返回 seA=7c5E try{ /OeOL3Y if(bFirst) :s#&nY { YQaL)t$0 nFileLength = getFileSize(); %kL]-Z if(nFileLength == -1) \=
Wrh3 { w
C-x' System.err.println("File Length is not known!"); T^H`$;\ } c1h?aP else if(nFileLength == -2) Z(hRwIOF { fX}dQN~z System.err.println("File is not access!"); !==C@cH<N } zqm/<]A*l else ;c|G { .2/W.z2 for(int i=0;i<nStartPos.length;i++) <v$yXA { :2-!bLo}& nStartPos = (long)(i*(nFileLength/nStartPos.length)); M][Zu[\* } GL3olKnL for(int i=0;i<nEndPos.length-1;i++) ..yLtqos { T9]:,
z nEndPos = nStartPos[i+1]; jo ~p#l.' } 7jYW3 nEndPos[nEndPos.length-1] = nFileLength; :+UahwiRD" } Q*]y=Za#: } <%=@Ue zN>tSdNkI- H)NT2@%{P //启动子线程 Rs53R$PIR fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; CxJH)H$ for(int i=0;i<nStartPos.length;i++) v Yw$m#@ { #&& fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Kr74|W= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), rB.LG'GG] nStartPos,nEndPos,i); W(jP??up Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ])mYE
}g fileSplitterFetch.start(); e*pYlm } RhI>Ak;- // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ){"-J&@? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); |"k+j_/+ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8&++S> < nEndPos = " + nFileLength); we2D!Ywr // fileSplitterFetch[nPos.length-1].start(); c8M'/{4rH TbR!u:J
ui1h M //等待子线程结束 R%)7z)~ //int count = 0; R2dCp|6A //是否结束while循环 -+&sPrQ boolean breakWhile = false; |H4f&&Wd );*#s~R P: )YKro] while(!bStop) 3L-}B#tI { P{o //M write_nPos(); 7A4_b8 Utility.sleep(500); K5:> breakWhile = true; .u&GbM%Ga IGcYPL\& Un{ 9reX5 for(int i=0;i<nStartPos.length;i++) LABLT;c { yn KgNi if(!fileSplitterFetch.bDownOver) (-esUOB. { wQ~F%rQ$ breakWhile = false; ec"+Il break; QHbjZJ
N } AOR(1Qyo } p$zj2W+sN if(breakWhile) p^9u8T4l1 break; o 9{~F`{p -%>.Z1uj ql%]t~HR0 //count++; 'A#F< x //if(count>4) _U`1BmTC2 // siteStop(); UeN+}`!l } <#No t1R pXq5|,aC ,|Lf6k System.err.println("文件下载结束!"); 7Un5Y[FZo } ;8>
TD&]{ catch(Exception e){e.printStackTrace ();} "CF{Mu|Q= } S_Ug=8r4 :WnF>zN ff.;6R\ //获得文件长度 F}{uY(hv"[ public long getFileSize() 8@d,TjJDo { /Q2{w>^DK int nFileLength = -1; H<bB@(i try{ f)%8*B URL url = new URL(siteInfoBean.getSSiteURL()); _Sn7z? HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); br_D
Orq| httpConnection.setRequestProperty("User-Agent","NetFox"); G5'HrV D+69U[P_A 8^av&u$ int responseCode=httpConnection.getResponseCode(); 5_= HtM[v] if(responseCode>=400) E>3(ff& { A]q"+Z] processErrorCode(responseCode); 2]/[ return -2; //-2 represent access is error !i*bb~ } P xiJ R[a "[p-Iy1 \1cJ?/$_Of String sHeader; ?(P3ZTk?. :igURr V
j"B/@ for(int i=1;;i++) j SX VLyz { y%=t((.Z //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Cz]NSG 5 //Utility.log(in.readLine()); )%=oJ!) sHeader=httpConnection.getHeaderFieldKey(i); >r~!'Pd! if(sHeader!=null) gQ~X;' { :;u?TFCRx if(sHeader.equals("Content-Length")) 89X`U)Ws { "L~qsFL nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); sQ>L3F;A` break; '}.Z' %; } .iXIoka } *mTx0sQz(J else [
#1<W`95 break; Jx_BjkF } N)b.$aC } 2#?qey catch(IOException e){e.printStackTrace ();} |ZuS"'3_w catch(Exception e){e.printStackTrace ();} ^i!6q9<{e "~^#{q -=CZhp Utility.log(nFileLength); tsvh/)V Uel^rfE` T\Ld)'fNv return nFileLength; K,Z_lP_~Vw } N56/\1R \c.MIDp" |H7f@b]Sk //保存下载信息(文件指针位置) uDXRw*rTv private void write_nPos() y o
|"- { ^CWxYDG* try{ XlGDv*d:#d output = new DataOutputStream(new FileOutputStream(tmpFile)); K:\db'`` output.writeInt(nStartPos.length); (np60mX< for(int i=0;i<nStartPos.length;i++) cczV}m2) { z c7P 2@ // output.writeLong(nPos); !HPye@Ua output.writeLong(fileSplitterFetch.nStartPos); ,/bv3pE output.writeLong(fileSplitterFetch.nEndPos); F2#s^4Ii } >;}q output.close(); _BP!{~&; } #)hJ.0~3 catch(IOException e){e.printStackTrace ();} Bp>Z?"hTe catch(Exception e){e.printStackTrace ();} (viGL|Ogn } bw& U[|A0% @K:TGo,%I Q5~Y;0' //读取保存的下载信息(文件指针位置) D?:AHj%gW private void read_nPos() lZ![?t}2` { c. ;}e:)s try{ wz{]CQ 7" DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); fce~a\y0 int nCount = input.readInt(); r[}5<S Q nStartPos = new long[nCount]; ,8^QV3 nEndPos = new long[nCount]; ym~ for(int i=0;i<nStartPos.length;i++) o+j~~P { <+\
w .! nStartPos = input.readLong(); M!j: 2dT" nEndPos = input.readLong(); B(TE?[ # } #2qDn^s input.close(); ,q|;`?R; } CV
)v6f catch(IOException e){e.printStackTrace ();} SZ'2/#R> catch(Exception e){e.printStackTrace ();} [@LA<Z_ } U3UDA \2Atm,#4 xYUC|c1Q9 private void processErrorCode(int nErrorCode) 8M&q { OPtFz6 System.err.println("Error Code : " + nErrorCode); gcKXda( } >.X& v ?\7$63gBH !:<(p //停止文件下载 $63_*9 public void siteStop() aUTXg60l* { ta'{S=^j bStop = true; 'W2B**} for(int i=0;i<nStartPos.length;i++) ?7]UbtW[ fileSplitterFetch.splitterStop(); =Mby;wQ?| ;Or]x?- q{:]D(
} nhZ^`mP } ,6iXl ch //负责部分文件的抓取 Je1'0h9d **FileSplitterFetch.java f%2>pQTq@) */ C@#KZ`c) package NetFox; N!#0O.6 aI'MVKwMk TyG;BF|rwk import java.io.*; Y_SB3 $]) import java.net.*; }Jr!aM' v:7_ZD6kR
aViZKps`m public class FileSplitterFetch extends Thread { (SnrYO`# ]8;2Oh
J+o6*t2| String sURL; //File URL
x $@Gp long nStartPos; //File Snippet Start Position ys~oJb~ long nEndPos; //File Snippet End Position ZFH; int nThreadID; //Thread's ID :*6#(MX boolean bDownOver = false; //Downing is over ,u&K(Z% boolean bStop = false; //Stop identical |Y")$pjz FileAccessI fileAccessI = null; //File Access interface "gCqb;^ CL)*cu6zG N" =$S|Gs public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 9-(
\\$% { BdQ/kXZu+ this.sURL = sURL; }F<= this.nStartPos = nStart; ]aN]H a this.nEndPos = nEnd; ~(~
y=M nThreadID = id; WPpS? fileAccessI = new FileAccessI(sName,nStartPos);//定位 Fk*C8 } cq#=Vb &]_2tN=S$ lv=rL public void run() I #8TY/XP { ?[z@R4at while(nStartPos < nEndPos && !bStop) %m5&Y01
{ r 1x2) $FM:8^ E-?@9!2
& try{ ~qu}<u)P URL url = new URL(sURL); /ho7O/aAa HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;T,`m^@zf httpConnection.setRequestProperty("User-Agent","NetFox"); A/A;'9 String sProperty = "bytes="+nStartPos+"-"; +{dJGPoY]p httpConnection.setRequestProperty("RANGE",sProperty); T_NN.Ol Utility.log(sProperty); qvN`46c aWTvowA Hph$Z1{ InputStream input = httpConnection.getInputStream(); 7LrWS83 //logResponseHead(httpConnection); )r|Pm-:A{ cf{rK`Ff^ IQNvhl.{ byte[] b = new byte[1024]; cI/Puh^3 int nRead; r'E|6_0 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) mi&mQQ { dZIruZ)x nStartPos += fileAccessI.write(b,0,nRead); X*QQVj //if(nThreadID == 1) 2Cgq&\wS // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); NS3qNj
} 1k dQh&~G 1h,m t*dd/a Utility.log("Thread " + nThreadID + " is over!"); d:{#Dk# bDownOver = true; [+.P'6/[$R //nPos = fileAccessI.write (b,0,nRead); }h=}!R'm } >Nr~7s catch(Exception e){e.printStackTrace ();} 1P6!E*z\ } vL
]z3 } e4<[|B!O o)r%4YOL x4^*YZc$, //打印回应的头信息 2}xvM"k=k public void logResponseHead(HttpURLConnection con) Wa!}$q+ { \yKYBfp-p for(int i=1;;i++) ?j|i|WUD { + )lkHv$R String header=con.getHeaderFieldKey(i); DNmP> ~ if(header!=null) (*Fb/ //responseHeaders.put(header,httpConnection.getHeaderField(header)); 2'T uS? Utility.log(header+" : "+con.getHeaderField(header)); MNWuw;:v else 4khc*fh break; C
$*#<<G } Ds@nuQ } C]GW u~QF -![>aqWmj1 </-aG[Fi public void splitterStop() YX{c06BHs { E*G{V j bStop = true; ]3&BLq } /P
koqA, fj:q_P67o ,cCBAOueO } )FSa]1t;x DC+l3N LnlDCbF;! /* i/{`rv*K[ **FileAccess.java w6<zPrA *//文件访问(定位,写) F$nc9x[S package NetFox; @0&KM|+ import java.io.*; Ro:)N:C vH)V\V \I+#M-V public class FileAccessI implements Serializable{ ;JV(!8[ /?_5!3K J //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 <&MY/vV RandomAccessFile oSavedFile; F*J@OY8i long nPos; ,]H2F']4Z :V
ZXI#([ Z,JoxK2"
public FileAccessI() throws IOException G-Dc(QhU& { b 67l\L this("",0); cu )w6!f } wq
=Ef e763yd #CTeZ/g public FileAccessI(String sName,long nPos) throws IOException 9?.
{ =niT]xf oSavedFile = new RandomAccessFile(sName,"rw"); mT&?DZ9< this.nPos = nPos; +XoY@|Djd oSavedFile.seek(nPos); =kDh: &u% } +Vw]DLWR Y |'}VU M=#'+CF}W public synchronized int write(byte[] b,int nStart,int nLen) vV*i)`IXe { :O/QgGZN$ int n = -1; R}T\<6Y try{ X6G2$| oSavedFile.write(b,nStart,nLen); }[b3$WZ n = nLen; 'v 0(ki# } 7(plHW| catch(IOException e) i(an]%'v { QUKv :; e.printStackTrace (); }2.0e5[ } 9six]T J|.n bSE qj1Fj return n; 1dl(`=^X } aU?HIIA &\L\n}i- Bh5z4 } 0+ 3{fD/ HJ0Rcw% u}eLf'^ZCe /* #j4jZBOTM **SiteInfoBean.java G^2%F5@ */ ^
RIWW0 package NetFox; S:{`eDk\A_ kj/v$m >bbvQb+j public class SiteInfoBean { P&5kO;ia Yx':~ V|j{#; private String sSiteURL; //Site's URL xFp?+a private String sFilePath; //Saved File's Path l9vJ] private String sFileName; //Saved File's Name @BoZZ private int nSplitter; //Count of Splited Downloading File y7U?nP ')+ tf4clzSTa dLtmG:II public SiteInfoBean()
ES ?6 {//nSplitter的缺省值为5 :@#6]W //default value of nSplitter is 5 80"oT'ZFh this("","","",5); Z}yd`7 } Q=h37]U+ ]6@6g>f? $ 9
k5a public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ]/{iIS_ { 1{.5X8y1x sSiteURL= sURL; ;YYnIb( sFilePath = sPath; v{pW/Fu~ sFileName = sName; 04#<qd&ob@ this.nSplitter = nSpiltter; 0S&C[I
o6 x<1t/o ~ugH2jiB } oq[r+E-]$@ L7nW_ rAh|r}R public String getSSiteURL() cQrXrij;! { 9yWSlbPr] return sSiteURL; Dn:1Mtj- } ccwz:7r Q& S 7_ TFDzTD public void setSSiteURL(String value) ?\_vqW { GC7W7B sSiteURL = value; =kjD ]+l } K&BaGrR N9 TM :;K Q]< public String getSFilePath() =55V<VI { X/FR e[R return sFilePath; q@i.4>x } /$^SiE+N 5MK.>3fE IwR=@Ne8 public void setSFilePath(String value) 3:bP>l! { SK5__Ix sFilePath = value; s){R/2O3F } BiA^]h/| VVqpzDoXG #>2cfZ`6'J public String getSFileName() ,15$$3z /E { jvhD_L/ return sFileName; ^ #3,*(S } ,{d=<j_ G%U!$\j:qd 0%qM`KZC public void setSFileName(String value) e}ivvs2 { $]MOAj"LH sFileName = value; U04)XfO;] } !,{-q)'D -BH T'zq1S \~.elKw<U public int getNSplitter() n<Ki.;-ZE { O@>{%u return nSplitter; at(gem } (I;lE*> A_+*b
[P R)Dh; XA public void setNSplitter(int nCount) o<rbC <
U { !L)yI#i4C nSplitter = nCount; `+(4t4@ew } 7e
/Kh)5G } VM+l9z> }]. |7h A:*$r Hbzl /* k[\JT[Mp **Utility.java ~>$z1o&}. */ 5Zl7crA [ package NetFox; 1~vv<`- ZVz*1]}
*}Rd%' public class Utility { n"<'F4r X
[;n149o h([qq<Lzs public Utility() \3whM6tK { 0gr#<( c[EG
cY={ h8P_/.+g|V } 4g?qKoc
i 8xHjdQr //线程睡眠 }R`}Ey|{ public static void sleep(int nSecond) '8b=4mrbH { _#w5hXcu try{ a]4|XJ_ Thread.sleep(nSecond); j2 jUrl } Nrc-@ ] catch(Exception e) >Vb V<ak { ;(IAhWE?7 e.printStackTrace (); =h}PL22 } '>>@I~<\ } n;k
B_i*l <9`/Y"\ p //日志 RMa#z [{0 public static void log(String sMsg) vr$z6m ^ { $'b b)@_ System.err.println(sMsg); M B,Z4 ^ } dfs1BV' Dm`gzGl i>;6Z s>S public static void log(int sMsg) C12y_E8Un { Hzc^fC System.err.println(sMsg); jxnb<!|?H@ } tfjb G;R } uQkQ#'e| ,J'@e+jV qb5IpI{U /* #e6x_o| **TestMethod.java nG"Ae8r */ }:+P{ package NetFox; VqeW;8&*iv Xa[lX8$zL HA.
O"A8` public class TestMethod { bc\?y2
3 ~q{QquYV l%7^'nDn public TestMethod() w4Ku1G#jC { ///xx/weblogic60b2_win.exe _2WIi/6K try{ M:w]g` LKl SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ~T&X#i //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); dZ\T@9+j+ SiteFileFetch fileFetch = new SiteFileFetch(bean); LY!.u?D`P fileFetch.start(); zxvowM } (rSBzM]H catch(Exception e){e.printStackTrace ();} 6d YUMqQ @m"P_1`* >{juw&Uu } 8C2!Wwz`J8 VB{G%!} R= *vPS public static void main(String[] args) m`/!7wQs { [
]=}0l<J new TestMethod(); U&y?3 } sB`zk[R; } fhe%5#3 点击下载更多相关资料
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