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/* VW%eB **SiteFileFetch.java /z(;1$Ld6{ */ j3kcNb package NetFox; 4w)aAXK import java.io.*; wgV?1S>Z import java.net.*; h p<NVST y wf@G;
fK ~V:@4P public class SiteFileFetch extends Thread { Xv2u7T\ Lfj]Y~*z Ic,V,#my SiteInfoBean siteInfoBean = null; //文件信息Bean O>~ozW& long[] nStartPos; //开始位置 V+y yy-/ long[] nEndPos; //结束位置 \y\@=j FileSplitterFetch[] fileSplitterFetch; //子线程对象 6.>l long nFileLength; //文件长度 F%s'R 0l boolean bFirst = true; //是否第一次取文件 q<2b,w== boolean bStop = false; //停止标志 YH
.+(tNv File tmpFile; //文件下载的临时信息 YYzl"<)c DataOutputStream output; //输出到文件的输出流 zo{WmV7[| 9yA? 82)E //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) }o{6 public SiteFileFetch(SiteInfoBean bean) throws IOException .on}F>3k$ { ]u(EEsG/ siteInfoBean = bean; >i:hdcxe //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); G|,'6|$jE tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); CdFr
YL+F if(tmpFile.exists ()) g~Hmka_fD1 { sfuA
{c'v bFirst = false; ]>%M%B read_nPos(); XSDudL } x8v2mnk else
I"Gr <?r { m@2;9 nStartPos = new long[bean.getNSplitter()]; bFt$u]Yvo nEndPos = new long[bean.getNSplitter()]; '
6#en9{L } Kz`g Q |S { :~D #383W)n
IBY(wx[5S } }.$5'VGO s<;kTReA MNzWTn@ public void run() <dA D-2O+ { q/N1q& //获得文件长度 9}_ccq //分割文件 Bf-KCqC". //实例FileSplitterFetch CPj8`kl //启动FileSplitterFetch线程 0Ia8x?80V //等待子线程返回 X$4MpXx try{ PRyZ; @ if(bFirst) &!=[.1H< { ='"hB~[ nFileLength = getFileSize(); hDsSOpj if(nFileLength == -1) qx+ .v2G { ,^#{k!uaC{ System.err.println("File Length is not known!"); 74u_YA<" } x6BO%1 else if(nFileLength == -2) o[ua$+67E { Tz"Xm/Gy System.err.println("File is not access!"); x_K8Gr#Z 0 } '9R.$,N else +uD4$Wt_F { p+pBk$4 for(int i=0;i<nStartPos.length;i++) BIM!4MHLA { zQNkjQ{mx nStartPos = (long)(i*(nFileLength/nStartPos.length)); q(C <w } ]g0h7q)79 for(int i=0;i<nEndPos.length-1;i++) c@xQ2&i { g
AZe&"K nEndPos = nStartPos[i+1]; j4fv-{=$ } Dno'-{- nEndPos[nEndPos.length-1] = nFileLength; Z<2j#rd } 3{j&J- } )^^Eh=Kbj $afE=
qC* &0='z //启动子线程 &LD=Zp% fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 9BA*e-[ for(int i=0;i<nStartPos.length;i++) [IgB78_$ { ^ rB7&96C, fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 2[;4D/`* siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), GqT0SP nStartPos,nEndPos,i); jLy3c@Dp Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Y>l92=G fileSplitterFetch.start(); z|5Sy.H> } s?g`ufF.t // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {@7{!I|eD siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); M~uX!bDH // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ?;dfA/ nEndPos = " + nFileLength); AzmISm // fileSplitterFetch[nPos.length-1].start(); 9:\YEs" PU\?eA :qQpBr$ //等待子线程结束 G+$A|'<`z //int count = 0; 13X\PO'9 //是否结束while循环 l^$8;$Rq
boolean breakWhile = false; PI5a'k0F Y4 < XC
D &Im while(!bStop) -hpJL\ng { P`$"B0B) write_nPos(); yL#bZ9W
} Utility.sleep(500); JTw3uM, e breakWhile = true; ~$PQ8[= s:fy
*6=[Z MBO3y&\S4 for(int i=0;i<nStartPos.length;i++) '0juZ~>} { TO|&}sDh if(!fileSplitterFetch.bDownOver) LG/6_t} { e_6-+l!f breakWhile = false; e9 `n@ break; Uo7V)I;o } h ?Ni5 } IQ`#M~: if(breakWhile) ^-24S#KE break; QS*!3?% O6[, K1, xMb)4 cw} //count++; 64hl0'67y //if(count>4) DAPbFY9 // siteStop(); %e71BZo~^s } YjT7_|`(] j?YZOO>X k$u/6lw]IB System.err.println("文件下载结束!"); sUki|lP } "/O`#Do/ catch(Exception e){e.printStackTrace ();} \"X<\3z2 } Tr}
r`
% [ ;$(; 20O\@}2q2M //获得文件长度 'rX!E,59 public long getFileSize() ~`<(T)rs { 6;:s N8M+1 int nFileLength = -1; xjplJ'jB try{ **%/Ke[ URL url = new URL(siteInfoBean.getSSiteURL()); k6pXc<]8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); vwlPFrLl httpConnection.setRequestProperty("User-Agent","NetFox"); dCF!. !5/jDvh
}aPx28:/ int responseCode=httpConnection.getResponseCode(); FBR]) h'Z if(responseCode>=400) 7LQLeQvB { Fk(+S:{yQ processErrorCode(responseCode); &6yh4-(7 return -2; //-2 represent access is error ~; emUU } \G!TC{6 "'@iDq%y cr&sI=i String sHeader; SXA`o<Ma AaVj^iy/X $Ka-ZPy<# for(int i=1;;i++) 7AE)P[ { ~ PO)>; //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); <Ag`pZ<s //Utility.log(in.readLine()); c']3N sHeader=httpConnection.getHeaderFieldKey(i); z^KMYvH
g if(sHeader!=null) zB8 @Wl { " ^t3VjN if(sHeader.equals("Content-Length")) aBH!K
{ &at^~o nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); }i"\?M break;
S#kA$yO } '`/Qr~] } :#?Z)oQpT else `<0{U]m break; M[C9P.O%w } E% ?X-$a } .5i\L OTd catch(IOException e){e.printStackTrace ();} J <<Ph catch(Exception e){e.printStackTrace ();} XtJ_po \fHtk _ * mzJ)4A Utility.log(nFileLength); v(=?ge YLo KqM!7 [SFX;v!9 return nFileLength; 9L$bJO-3 } 8 f""@TTp JD Q7 7_HJ|QB //保存下载信息(文件指针位置) Y5 BWg private void write_nPos() gJkk0wokC { W'>"E/Tx#O try{ LSR{N|h+) output = new DataOutputStream(new FileOutputStream(tmpFile)); +/bT4TkML output.writeInt(nStartPos.length); yX%Xjo__*t for(int i=0;i<nStartPos.length;i++) sS 5aJ}Qs { l"I
G;qO. // output.writeLong(nPos); yXuF<+CJ output.writeLong(fileSplitterFetch.nStartPos); zNF.nS}: output.writeLong(fileSplitterFetch.nEndPos); ;^Q- 1 } %Km^_JM output.close(); oVG/[e|c' } O?6ph4' catch(IOException e){e.printStackTrace ();} 8"f Z>XQ catch(Exception e){e.printStackTrace ();} tp6-j`7u } Zj(2$9IU |;G9K`8 rF/k$_bFt //读取保存的下载信息(文件指针位置) M<4tjVQ6 private void read_nPos() $jpAnZR- / { (}]ae* try{ :y>$N(.8f DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); z1-JoZ int nCount = input.readInt(); TqvgCk- nStartPos = new long[nCount]; [>rX/a%c nEndPos = new long[nCount]; x&n gCB@O for(int i=0;i<nStartPos.length;i++) pj~Ao+ { kw%vO6"q( nStartPos = input.readLong(); aBBTcN%' nEndPos = input.readLong(); }mZsK> } F5hOKUjv input.close(); Pjs
L{, } bJ~@
k,' catch(IOException e){e.printStackTrace ();} gc
ce]QS catch(Exception e){e.printStackTrace ();} _iJ8*v8A } lg9`Z>? 9S.J%*F7 5IwQ<V private void processErrorCode(int nErrorCode) WOv m%sX { {^Y0kvnd System.err.println("Error Code : " + nErrorCode); *!~jHy8F } $KmhG1*s #RJFJb/ 4axc05 //停止文件下载 ceW,A`J public void siteStop() U_X / { w7(jSPB bStop = true; 1x"S^j
for(int i=0;i<nStartPos.length;i++) lY.{v]i } fileSplitterFetch.splitterStop(); (jV_L1D "@!B"'xg LW"p/`#< } Id<3'ky<N } )kBN]>&R //负责部分文件的抓取 i^i^g5l! **FileSplitterFetch.java \-Oq/g{j */ /3(|P package NetFox; A6 D@#(D f vAF0
a -0 e&>H% import java.io.*; 3I" <\M4x import java.net.*; l2AAEB_C. Y$@?Y/rhR z_A:MoYfo public class FileSplitterFetch extends Thread { +2ZBj6 e9 7QO QG:- fsA-}Qc String sURL; //File URL f|U
J%}$v; long nStartPos; //File Snippet Start Position @CxXkR long nEndPos; //File Snippet End Position e5"?ol0 int nThreadID; //Thread's ID ^Hdru]A$2 boolean bDownOver = false; //Downing is over &fIx2ZM[ boolean bStop = false; //Stop identical Ah_Ttj FileAccessI fileAccessI = null; //File Access interface -C>q,mDJZ )\!-n]+A na%DF@Rt# public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException y[pU8QSt { 8,5H^Bi this.sURL = sURL; ~ sC< V this.nStartPos = nStart; qv+8wJ(( this.nEndPos = nEnd; Q#,j,h nThreadID = id; "#3p=}] fileAccessI = new FileAccessI(sName,nStartPos);//定位 Tej&1'G } 4!I;U>b b F+lsza k~YZT 8 public void run() k=7+JI"J { ZeL v! while(nStartPos < nEndPos && !bStop) h=1cD\^|qw { NIzxSGk| o:.6{+|N 7[b]%i try{ -UhSy>m URL url = new URL(sURL); AXQG HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %+1;iuDL httpConnection.setRequestProperty("User-Agent","NetFox"); _w'N String sProperty = "bytes="+nStartPos+"-"; b6LwKUl httpConnection.setRequestProperty("RANGE",sProperty); jOE~?{8m Utility.log(sProperty); `X =2Ff 5@:c6(5$ {eQ')f InputStream input = httpConnection.getInputStream(); pYtvenBy //logResponseHead(httpConnection); AzfYw'^&9 /IkSgKJiz\
JyfWy byte[] b = new byte[1024]; d{gj8 int nRead; ~<)CI0= while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) >_<J=8|E { iJr 1w&GL$ nStartPos += fileAccessI.write(b,0,nRead); GOzV# //if(nThreadID == 1) \0^ZNa? // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); f:).wi
Ld } v4YY6?4 <21@jdu3n, y{`aM(& Utility.log("Thread " + nThreadID + " is over!"); W l4T}j bDownOver = true; IhRYV`: //nPos = fileAccessI.write (b,0,nRead); -%h0`hOG{ } [xrM){ItW catch(Exception e){e.printStackTrace ();} 1\~-No } E2
5:eEXa } gLH#UwfJ M<sY_<z .2si[:_(p //打印回应的头信息 =Y0>b4 public void logResponseHead(HttpURLConnection con) .ZB/!WiF { (t{m(;/ for(int i=1;;i++) )Q!3p={S* { */kX|Sur String header=con.getHeaderFieldKey(i); 7Lv5@ if(header!=null) Wb|xEwq d` //responseHeaders.put(header,httpConnection.getHeaderField(header)); p{sbf;-x} Utility.log(header+" : "+con.getHeaderField(header)); W$l%= / else x;G~c5 break; gA&+<SK( } xD(RjL+ } Qxvj`Ge ] VN4;R LvtZZX6! public void splitterStop() nmc5c/C|-I { pO;BX5(x bStop = true; L&i _ } t]j4PNzn XHN`f#(w w(y#{!%+ } Ke_&dgsq |<YoH$. X~H~k1 /* 77:s=) **FileAccess.java TC2gl[ *//文件访问(定位,写) $oJ)W@> package NetFox; [CfA\-gx<f import java.io.*; R
m{\ R ,sM>{NK9R iTt#%Fs)4M public class FileAccessI implements Serializable{ e^Ds|}{V rRfPq //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 !*U#,qY RandomAccessFile oSavedFile; >-~2:d\M3 long nPos; 0B4&!J `$X|VAS2 8@S5P$b}; public FileAccessI() throws IOException xSQ0] vE { ddR_+B*H this("",0); w84
]s%y } Mohy;#8Wk Cw=wU/) dXe.
5XC public FileAccessI(String sName,long nPos) throws IOException ,r,~1oV<" { 7jb{E+DrG oSavedFile = new RandomAccessFile(sName,"rw"); &I[ITp6y0 this.nPos = nPos; I3 %P_oW' oSavedFile.seek(nPos); owA0I'|V-A } 8Jz/' a-`OE" .45XS>=z# public synchronized int write(byte[] b,int nStart,int nLen) %PsDS { QSn%~o05 int n = -1;
O$> <E8q try{ NjTVinz oSavedFile.write(b,nStart,nLen); sH^?v0^a n = nLen; h-XMr_F } wGqQR)a catch(IOException e) A0NNB%4|/ { 4LCgQS6 e.printStackTrace (); 4b" %171 } [N|/d# I82?sQ7 "4{_amgm&< return n; A~vZ}?*M } LE15y> xLE+"6;W U`j[Ni}" } CIM9~:\ 8e'0AI_> !lSxBr[dQ /* XsldbN^6 **SiteInfoBean.java ~IHjj1s */ ^J8sR4p# package NetFox; nP9@yI*7 ~YIGOL"? >`jsUeS public class SiteInfoBean { 3^LSK7.: I5"ew=x# |~!
R5|Q private String sSiteURL; //Site's URL CS 7"mE`{ private String sFilePath; //Saved File's Path u}QB-oU private String sFileName; //Saved File's Name Dm@wTt8N( private int nSplitter; //Count of Splited Downloading File XUD/\MoV ub"(,k P s$Il; public SiteInfoBean() {__Z\D2I {//nSplitter的缺省值为5 1}E`K# //default value of nSplitter is 5 JJnZbJti this("","","",5); SL;\S74 } Z=O 2tR 7Q<uk[d0 +uF!.!} public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ~Od4(
}/G { *yuw8 sSiteURL= sURL; K_V44f1f sFilePath = sPath; @jW_
rj:< sFileName = sName; e75k- this.nSplitter = nSpiltter; (89NK]2x {IeW~S'& .+G),P) } U*ZP>Vv Ae,-.xJ &bx;GG\<4 public String getSSiteURL() 8wz4KG3SK { %h**L'~`` return sSiteURL; n:?fv=9n } ^4LkKYMS F|*{Ma R
v9?<] public void setSSiteURL(String value) a;Ic!:L { H/_R!G8\ sSiteURL = value; d 7A08l{ } uQN8/Gy*J -ob_]CKtJ~ ZdEeY|j public String getSFilePath() a1p:~;f}[ { DBl.bgf return sFilePath; 0fvQPs!O } ,P^pDrc @18"o"c7j #&.&Uu$ public void setSFilePath(String value) d:0RDK-}s { AElx #`T sFilePath = value; [L1pDICoy } >n@?F[ Y oK h#th pN<wO1\9 public String getSFileName() lgZ3=h { )5lo^Qb return sFileName; Lj"~6l`) } xm>RLx}9 uROt h_/ rE"`q1b# public void setSFileName(String value) ZVpMR0! { [ADr
_ sFileName = value; ;YxQo
o> } v*5n$UFV W|@EK E.k /%Bc*k=ox public int getNSplitter() sk!v!^\_r { Wy%q9x]} return nSplitter; 9+.0ZP? } B^Q\l!r zIWw055W krZ J"` public void setNSplitter(int nCount) v'B++-% { o)KF+[^ nSplitter = nCount; QBa1c-Y } CzxU
@ } .-+_>br~ v?rjQ'OP gZgb-$b /* *L8Pj`zR **Utility.java Q44Pg$jp */ ks7g*; 3{@ package NetFox; PYqx&om 4VPL
-":6 < vU<:S public class Utility { o|8
5<~` s)"C~w^ D%umL/[] public Utility() D;)Tm|XizW { ^~(vP: K1Nhz'^=D &R/)#NAp } w4pU^&O I!.o&dk //线程睡眠 &|u public static void sleep(int nSecond) 7]YLe+Ds { <3z]d?u try{ y]9
3z!#Z Thread.sleep(nSecond); m/n_e g } dg 0`0k catch(Exception e) z
%` \p { T%K(opISc( e.printStackTrace (); b9[;qqq@' } qSj2=dlW } _*6nTSL r_T\% //日志 ZA zn-n public static void log(String sMsg) T F&xiL^ { Z}.N4 / System.err.println(sMsg);
wly#| } |$#u~<r_
w Ix g.^>62 KDgJ~T public static void log(int sMsg) F{ J>=TC { Ae:(_UJz System.err.println(sMsg); -Ep cX!i } npg.*I/> } g5R2a7 "JAYTatO7H /HgdTyR) /* /ZZo`
**TestMethod.java >|!F.W */ E#r6e+e1Q% package NetFox; %TdZ_ 314PcSc rH8^Fl&jT public class TestMethod { G>&=rmK" ZO{uG(u zx'G0Z9] public TestMethod() -EFtk\/ { ///xx/weblogic60b2_win.exe 64>E|w try{ jDIO,XuF SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); |Y"q. n77 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 5b3Wt7 SiteFileFetch fileFetch = new SiteFileFetch(bean); <~t38|Ff@
fileFetch.start(); H1rge< } Jf@M>BT^A catch(Exception e){e.printStackTrace ();} Z+)R%Z'aL <",4O 4m$n Vv } [ jve
|-v= w-};\]I s/UIo^m public static void main(String[] args) +I#4+0f { :
m$cnq~h new TestMethod(); X|t?{.p } sXOGIv } 7g_:Gv~v 点击下载更多相关资料
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