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/* bW]+Og **SiteFileFetch.java *Y ZLQT */ Ah`dt8t package NetFox; QFYy$T+W import java.io.*; 96avgyc import java.net.*; v2'JL(= kR]SxG9 >e ;f{ public class SiteFileFetch extends Thread { Ul
Iw&U |9I;`{@ `N|CL SiteInfoBean siteInfoBean = null; //文件信息Bean (% P=#vZ long[] nStartPos; //开始位置 `,Gk1~Wv long[] nEndPos; //结束位置 I\~V0<"jI FileSplitterFetch[] fileSplitterFetch; //子线程对象 C.-a:oQ[ long nFileLength; //文件长度 @\?f77Of6 boolean bFirst = true; //是否第一次取文件 9_3M}|V$^e boolean bStop = false; //停止标志 (T01hR& File tmpFile; //文件下载的临时信息 ErC[Zh"'' DataOutputStream output; //输出到文件的输出流 $wTX M'iKk[Hjfx //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) \irjIXtV public SiteFileFetch(SiteInfoBean bean) throws IOException dk/*%a
+ { }q W aE siteInfoBean = bean; N sL"p2w~ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Gu).*cU tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); [B`P]}gL: if(tmpFile.exists ()) $4L3y
uH { =1\wZuK# bFirst = false; 5QJL0fc read_nPos(); )g_zPt } m=B0!Z1xx else >>zoG3H! { FOi`TZ8 nStartPos = new long[bean.getNSplitter()]; zP}v2 nEndPos = new long[bean.getNSplitter()]; J
*?_SnZ } t8 "-zd8 j:3Hm0W3 ^ZUgDQduc v!A|n3B]p } d
A{Jk Q0\5j<'e 22~X~= public void run() 79g>7<vp { bU`yymf{L //获得文件长度 8 {%9%{ //分割文件 98'XSL| //实例FileSplitterFetch LW5ggU/ //启动FileSplitterFetch线程 , vyx`wDd //等待子线程返回 zqr%7U try{ ilpZ/Rs if(bFirst) }tO<_f)) { "IJMvTmj nFileLength = getFileSize(); !13
/+ u if(nFileLength == -1) h##?~!xDmq { 4^_Au^8R( System.err.println("File Length is not known!"); Q$/F gS
} ky$:C,1t else if(nFileLength == -2) 9= $,] M { 6F/
OlK< System.err.println("File is not access!"); mIEaWE;E" } bI6wE'h else ULmdt
{ l(\8c><m for(int i=0;i<nStartPos.length;i++) M`pTT5r { .0W4Dp nStartPos = (long)(i*(nFileLength/nStartPos.length)); l!V| T? } +{i"G,3 for(int i=0;i<nEndPos.length-1;i++) P3ev4DL { N%|Vzc nEndPos = nStartPos[i+1]; yPG\ &Bo } ?V:]u3 nEndPos[nEndPos.length-1] = nFileLength; IYg3ve`x } @^6OV) } !_H8Q}a NG!cEo:2aa lWw!+[<:q1 //启动子线程 Yk@s"qm3 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; G^@Jgx3n for(int i=0;i<nStartPos.length;i++) 8421-c6y> { HT=Am fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q[Sd siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 9iddanQA nStartPos,nEndPos,i); .P:f Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); IH5} Az fileSplitterFetch.start(); r2F } UEQ'D9 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), S]%U] siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 1L=Qg4 H // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Vt)\[Tl~ nEndPos = " + nFileLength); Fp6[W5>(- // fileSplitterFetch[nPos.length-1].start(); *5_8\7d -1r &s ""v`0OP&J //等待子线程结束 H0b6ZA%n //int count = 0; kPX2e h //是否结束while循环 LVFsd6:h boolean breakWhile = false; &J/4J )C01fZhD CBnouKc: while(!bStop) r|\'9"@ { +b,31 write_nPos(); &;h~JS= Utility.sleep(500); PVS<QN% breakWhile = true; azDC'.3{p &c<}++'h 9<(K6Q for(int i=0;i<nStartPos.length;i++) <X I35\^ { $,QpSK`9i if(!fileSplitterFetch.bDownOver) ^'u;e(AaE
{ IL>/PuZku breakWhile = false; )Rhf f$ break; 'D0X?2 } X!#i@V } KIAe36.~ if(breakWhile) 97]a-)SA break; PZ!dn%4jy d7_ g
u ZP63Alt //count++; *e-ptgO //if(count>4) EB29vHAt~ // siteStop(); Y7:Y{7E7 } Id.Z[owC`Y 8pq-nuf|K Hr<C2p^a System.err.println("文件下载结束!"); J%\~<_2ny } 16[-3cJ T catch(Exception e){e.printStackTrace ();} -#S)}NEn } zOiY0`= yK&*,J
| N,/BudFo //获得文件长度 2%{YYT
public long getFileSize() .W@(nQ-< { =,AC%S_D~ int nFileLength = -1; &G
pA1 try{ znQ'm^ h URL url = new URL(siteInfoBean.getSSiteURL()); 1~R$$P11[9 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); vhYMWfbY httpConnection.setRequestProperty("User-Agent","NetFox"); ?}=-eJ(7e Tbi]oB# $/, BJ/9 int responseCode=httpConnection.getResponseCode(); 0j{F^rph if(responseCode>=400) WG8iTVwx { OB I+<2`Oc processErrorCode(responseCode); `\/toddUh[ return -2; //-2 represent access is error 43J\8WBn@ } zmB31' _ && DD BLL]^qN;Y String sHeader; $>'" )7z +
%MO7vL ^nHB1"OCV for(int i=1;;i++) c?!YFm { e$Xq //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); "w*+v //Utility.log(in.readLine()); " K 8&{= sHeader=httpConnection.getHeaderFieldKey(i); *%T)\\H2 if(sHeader!=null) cS D._"P { XOysgX0g if(sHeader.equals("Content-Length")) YH)Opk { jFuC=6aF nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 2SDh0F break; OuOk= } ET,Q3X\Oe } Z0[)u_< else %s$rP break; gEr4zae } JcTp(fnW.~ } x],8yR)R catch(IOException e){e.printStackTrace ();} ?w+ QbT catch(Exception e){e.printStackTrace ();} lQV|U;~D .O5LI35, 7$!`p,@we/ Utility.log(nFileLength); NXzU0 I?_E,.)[ I `6a]|7|f return nFileLength; UGhW0X3k } xT9Yes& LXHwX*`Y .A3DFm3 t //保存下载信息(文件指针位置) _ Ry_K3K private void write_nPos() n?'d|h { rr |"r try{ <Ctyht0c. output = new DataOutputStream(new FileOutputStream(tmpFile)); \\=.6cg<K output.writeInt(nStartPos.length); UdT&cG for(int i=0;i<nStartPos.length;i++) I"Q#IvNw { +"]oc{W! // output.writeLong(nPos); X'cf&>h output.writeLong(fileSplitterFetch.nStartPos); +$>N]1 output.writeLong(fileSplitterFetch.nEndPos); '5'3_vM } w[
Axs8N' output.close(); nIf N" } TE3*ktB{N catch(IOException e){e.printStackTrace ();} YecT 96% catch(Exception e){e.printStackTrace ();} C&=x3Cz } /&CUspb N<9w{zIK( D9ANm"# //读取保存的下载信息(文件指针位置) Tdg6kkJ private void read_nPos() (~S<EUc$ { A2Q[%A try{ 2=>*O DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); H{ZLk, int nCount = input.readInt(); Osnyd+dJY nStartPos = new long[nCount]; :Df)"~/mO+ nEndPos = new long[nCount]; "X`RQ6~]> for(int i=0;i<nStartPos.length;i++) )AOPiC$jL { 7'Lp8 nStartPos = input.readLong(); &]w#z=5SXi nEndPos = input.readLong(); y =R
aJm } l{8CISO* input.close(); P*0f~eu } Y+FP catch(IOException e){e.printStackTrace ();} lqF>=15 catch(Exception e){e.printStackTrace ();} 8$ic~eJ } 5? Wg%@ hGvq T, ' rsWQHHkO private void processErrorCode(int nErrorCode) Rfht\{N 7 { f3!n$lj System.err.println("Error Code : " + nErrorCode); V"O9n[ | } Vn'?3Eb< ~x'zX-@rC zhX;6= X2 //停止文件下载 wS V@=)H\: public void siteStop() mmHJh\2v { Q\|18wkW bStop = true; Twx{' S for(int i=0;i<nStartPos.length;i++) HcA[QBh fileSplitterFetch.splitterStop(); )S2iIi;Bq pajy#0 U I] jX7.fx } #7o0dE;Kg9 } /l^y}o %? //负责部分文件的抓取 ilv _D~|
**FileSplitterFetch.java IP04l;p/ */ '*4iqPR; package NetFox; %*jGim~s JA<~xo[Q9 S;8. yj- import java.io.*; 7H%_sw5S. import java.net.*; zka?cOmYF[ #&V5H{ t@)my[ ! public class FileSplitterFetch extends Thread { d@ZoV 12lEs3 |<rfvsQ. String sURL; //File URL Aq"PG}Ic long nStartPos; //File Snippet Start Position g5}lLKT long nEndPos; //File Snippet End Position MKC$;>i int nThreadID; //Thread's ID &:No}6 boolean bDownOver = false; //Downing is over +*C^:^jA boolean bStop = false; //Stop identical yp p 4L|R FileAccessI fileAccessI = null; //File Access interface K6hfauWd[ ;g9% & @h#Xix7 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException c|lU(Tf { hM>*a!)U this.sURL = sURL; 4UD' %}>y this.nStartPos = nStart; kwlC[G$j7 this.nEndPos = nEnd; GJ `UO nThreadID = id; DWrbp fileAccessI = new FileAccessI(sName,nStartPos);//定位 e!Br>^8l } ~KRnr0 &Mj1CvCv eu9w|g public void run() 6e#wR/ { cy3M^_5B< while(nStartPos < nEndPos && !bStop) mgVML&^ { 6m+W#]^ ln#\sA?iG B+46.bIH try{ JYV\oV{ URL url = new URL(sURL); fhRjYYGI HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); @.ZL7$|d httpConnection.setRequestProperty("User-Agent","NetFox"); ~<,Sh~Ana. String sProperty = "bytes="+nStartPos+"-"; -k{Jp/-D httpConnection.setRequestProperty("RANGE",sProperty); yp+F<5o Utility.log(sProperty); +"uwV1)b" =dGKF`tR A(+:S"|@ InputStream input = httpConnection.getInputStream(); PN
&|8_ //logResponseHead(httpConnection); QNArZ6UQ iBoEZEHjw M&yqfb[ byte[] b = new byte[1024]; k[9A,N^lZB int nRead; W:O0} while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) z0Xa_w= { "8HE^Po/pn nStartPos += fileAccessI.write(b,0,nRead); _~A~+S} //if(nThreadID == 1) B 8{
uR // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %F J#uQXZ } `6F+Rrn d>!p=O`>{q yX!#a>d"H Utility.log("Thread " + nThreadID + " is over!"); S}7>RHe bDownOver = true; 4j3oT)+8 //nPos = fileAccessI.write (b,0,nRead); /9_#U#vhY } T~J?AKx catch(Exception e){e.printStackTrace ();} uD(t`W" } }bMWTT } 1;Xgc@ V@Wcb$mgk dJl^ADX[@ //打印回应的头信息 _M5Xk? e= public void logResponseHead(HttpURLConnection con) 3eKQ<$w {
%+wF" for(int i=1;;i++) f1Zt?= { @^?XaU String header=con.getHeaderFieldKey(i); wL2XNdo}< if(header!=null) p)/
p!d[T/ //responseHeaders.put(header,httpConnection.getHeaderField(header)); ^,V[nfQR Utility.log(header+" : "+con.getHeaderField(header)); o.^y1mH' else ,%hj cGX11 break; 8i:[:Z } GBbh ar},g } &p"(- JD~a UB% c3k|G<C2 public void splitterStop() R0<< f] { sKfXg`0 bStop = true; VPd,]]S5( } 70Ka! M !{'ED >&Fa(o;* } l2&hBacT 6c<ezEJ "l,UOv c /* >n!ni( **FileAccess.java j|K.i/ *//文件访问(定位,写) 7& 6Y package NetFox; @J vZ[T/ import java.io.*; DU{bonR` D;js.ZF f\K#>u*
Q public class FileAccessI implements Serializable{ o4)hxs aqr!oxn?t //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ^M|K;jt> RandomAccessFile oSavedFile;
W9R`A long nPos; &
_K*kI: .nZ3kT` nyhMnp#< public FileAccessI() throws IOException X\sm[_I { T[.[
g/` this("",0); 1^{`lK~2 } x /
XkD]Hq nNn56&N] 'b[0ci: public FileAccessI(String sName,long nPos) throws IOException MF.[8Zb { (5`T+pAsV oSavedFile = new RandomAccessFile(sName,"rw"); 8tQ|-l* this.nPos = nPos; /f3m)pT oSavedFile.seek(nPos); s AE9<(g&@ } 3jPB#%F (pYYkR" t26ij`V public synchronized int write(byte[] b,int nStart,int nLen) F?4Sz# { ybvI?# int n = -1; e4.&aIC[ try{ cY{Nos oSavedFile.write(b,nStart,nLen); =nhzMU9c\y n = nLen; NWKi
()nA% } {ZqQ!!b catch(IOException e) pm]fQuq { ?`P2'i<b e.printStackTrace (); y/R+$h(% } 6?SFNDQ"C 0HbJKix! 'ZnIRE,N return n; "!q?P"
@C } frH)_ YJ% !_^g8^>2( r95zP]T } qrDcL>Hrn }gCHQ;U7` 4e9E'
"8% /* fIyPFqf7w) **SiteInfoBean.java :s*>W$Wp4 */ [ud|dwP" package NetFox; ;.s:X ']?=[`#NL `P.CNYR<J public class SiteInfoBean { C EqZ:c oVkr3KZ }1m_o@{3P private String sSiteURL; //Site's URL OCW+?B; private String sFilePath; //Saved File's Path n`<U"$* private String sFileName; //Saved File's Name &=zU611, private int nSplitter; //Count of Splited Downloading File :_H>SR: >&hX&,hG ;$;rD0i| public SiteInfoBean() c]v
+ {//nSplitter的缺省值为5 @^CG[:| //default value of nSplitter is 5 M=%!IT this("","","",5); !}q."%%J_% } FpzP#; F^rl$#pCS ^<;w+%[MT public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) kfCKhx { k7Oy5$## sSiteURL= sURL; l* Y[^' sFilePath = sPath; :t>Q:mX(N sFileName = sName; 7@P656{ this.nSplitter = nSpiltter; #!d]PH746 e\.HWV ]I *<kD"m } K:w]>a t/ eo] h,]+ >`b public String getSSiteURL() IJIQ"
s { ':sTd^V return sSiteURL; \`gEu{ } Tc_do"uU 8.2`~'V A^g>fv
public void setSSiteURL(String value) CJA+v- { ohplj`X[21 sSiteURL = value; `[@VxGy_ } 0||F`24 o^PuhVu k<Oy%+C public String getSFilePath() p1^0{ILx { M5u_2;3 return sFilePath; \n(ROf^' } 8KKz5\kn7 GLcd9|H `Sx.|`x8 public void setSFilePath(String value) b[0S=e
G { yM|g|;U sFilePath = value; pz @km } J{!'f|
J [Q:f-<nH DO%Pwfkd public String getSFileName()
ol#yjrv { 4y>(RrVG return sFileName; raF]
k0{ } 6Ty3e|do +9_ ,w bF XLocg public void setSFileName(String value) 6lZGcRO { m2ox8(sd sFileName = value; Se/ss!If } $^IjFdD %GVN4y& 3 69Zu4|u public int getNSplitter() _j>L4bT { )r pD2H return nSplitter; ]Y =S } 5f{wJb2 {RJ52Gx( 2$Wo&Q^_ public void setNSplitter(int nCount) `OBl:e { <d S5||| nSplitter = nCount; F#KF6)P } _1\poAy } q55M8B 4w c l9$g7 I<KCt2:X /* ;xI0\a7 **Utility.java
Y=|CPE%V */ #XfT1 package NetFox; ILNXaJ'0a s4N,^_j '?b\F~$8 public class Utility { E;$$+rA oo\IS\ r;$r=Uf r public Utility() wZ
O@J| { )u-ns5 X= SG Zq^^|[)bA } nqrDT1b** yj'Cy8 //线程睡眠 AT-0}9z{ public static void sleep(int nSecond) `{Hb2
}L5 { qA04Vc[2 try{ <34 7 C{q Thread.sleep(nSecond); *0lt$F$~b } t={po QC~ catch(Exception e) g4i #1V= { 2nJYS2mT7 e.printStackTrace (); ["<5?!bU } A_aO}oBX } $@68= y>4p~ //日志 t Z+0}d public static void log(String sMsg) 75<el.'H { {({
R: !c System.err.println(sMsg); Nz}|%.GP" } }!Xf&c{7{ tD865gi Cy]" public static void log(int sMsg) 3Nc'3NPQ' { 2lF WW(
System.err.println(sMsg); gNG.l } ,#=eu85' } g~eJ
YS, e<kpcF5{\ t`h_+p%> /* ?U=mcdqd **TestMethod.java .v N)A
* */ ]Qh[%GD package NetFox; D\@e{.$MZ| 9fCiLlI xP XoJN public class TestMethod { ?56~yQF/2 k>7gy?Y!K< 0kkRK*fp}x public TestMethod() "4KkKi { ///xx/weblogic60b2_win.exe ,"x23=] try{ )j]gm i" SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 2*N&q|ED //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Z3OZPxm SiteFileFetch fileFetch = new SiteFileFetch(bean); ?a*fy}A| fileFetch.start(); 7YoofI } d&O'r[S catch(Exception e){e.printStackTrace ();} tq2-.]Y@U M-{b ,w,ENU0~f } :y4)qF K-N]h ZD$-V3e` public static void main(String[] args) "bv,I-\ {
v(i1Z}*b new TestMethod(); SH .9!lQv } }qG?Vmq*R[ } 7f.4/x^ 点击下载更多相关资料
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