-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* >4&s7][Q| **SiteFileFetch.java HyKv5S$ */ 6< O|,7=_ package NetFox; 0JS#{EDh+ import java.io.*; y|(C L^( import java.net.*; eB,eu4+- ?vr9l7VOi D +Ui1h- public class SiteFileFetch extends Thread { w:+wx/\ I' TprT T(2*P5%& SiteInfoBean siteInfoBean = null; //文件信息Bean W_%@nm\y long[] nStartPos; //开始位置 3;Ztm$8 long[] nEndPos; //结束位置 &x>8
%Q s FileSplitterFetch[] fileSplitterFetch; //子线程对象 &2\^S+4 long nFileLength; //文件长度 NUp,In_ boolean bFirst = true; //是否第一次取文件 Cr#Z. boolean bStop = false; //停止标志 i^2-PKPg{ File tmpFile; //文件下载的临时信息 \PJpy^i DataOutputStream output; //输出到文件的输出流 `#x}-A$ czu?]9;^
Z //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) W34_@,GD public SiteFileFetch(SiteInfoBean bean) throws IOException @=G6fW: { qnCJrY6] siteInfoBean = bean; 5nSi29C //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); #$;i 4a tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ll8Zo+-[ if(tmpFile.exists ())
L$Yg*]\ { CS|al(?~ bFirst = false; nXFPoR)T read_nPos(); (`me}8 } xq-TT2}<L else \~~y1.,U. { sm9/sX! nStartPos = new long[bean.getNSplitter()]; u-%|ZSg nEndPos = new long[bean.getNSplitter()]; Wi%e9r{hU } rS&"UH?c7 `m7w%J.> n |(77ao3 Iq["(!7E5 } Ka+N5 T.f [B+]F~}@ Q$lgC
v^M public void run() ]**h`9MF
{ yh:Wg$qx //获得文件长度 q\]"}M8 //分割文件 vn(ji= //实例FileSplitterFetch }Md5a%s< //启动FileSplitterFetch线程 A8oTcX_ //等待子线程返回 o<Y[GW1pg try{ :HW\awv if(bFirst) {;-wXzv` { >^N{ nFileLength = getFileSize(); &8xwR if(nFileLength == -1) 3<R8_p { TkyP_* System.err.println("File Length is not known!"); XS oHh- } 4Mck/i2 else if(nFileLength == -2) Iy8fN"I9D { N.D7 System.err.println("File is not access!"); QpI\\Zt6 } lV
M)'m else ONU,R\jMb- { 7Adg; for(int i=0;i<nStartPos.length;i++) U6x$R O! { hy|Yy&- nStartPos = (long)(i*(nFileLength/nStartPos.length)); Lh;U2pA } )~2~q7 for(int i=0;i<nEndPos.length-1;i++) 7GG:1:2+> { EV.F/Wh nEndPos = nStartPos[i+1]; zz**HwRt } T:!f_mu| nEndPos[nEndPos.length-1] = nFileLength; Sk7sxy<F' } /C\tJs } |9Pi*)E -50Qy[0. " sEzl4I //启动子线程 k;V (rf` fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; )1, U~+JFU for(int i=0;i<nStartPos.length;i++) `)WC|= w2 { M7gb3gw6 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), *F;W 1TF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), [M/0 Qx[, nStartPos,nEndPos,i); f(UB$^4 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^{{0ajI9C fileSplitterFetch.start(); U
ljWBd } =lZtI6tZ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), x +]ek
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); =Vat2'>+ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", |A, <m#C nEndPos = " + nFileLength); %n@ ^$&,&; // fileSplitterFetch[nPos.length-1].start(); Y?#aUQc x^~@`]TV^ 8.ej65r* //等待子线程结束 ?A]/
M~3B //int count = 0; $w+()iI //是否结束while循环 k3CHv =U{ boolean breakWhile = false; M.3ULt8 JA2oy09G O<()T6 while(!bStop) \&\U&^? { f)1*%zg% write_nPos(); 4Is Wp!`W Utility.sleep(500); 6lob&+ breakWhile = true; tUT:vK` /{>_'0 nq
qqP for(int i=0;i<nStartPos.length;i++) jp880} { sv)4e)1 if(!fileSplitterFetch.bDownOver) vlC$0P { I3;03X<2 breakWhile = false; LbUH`0:%t break; p`)Mk<`dYD } M3!4,_!~ } 'l $ViNq; if(breakWhile) pmc)$3u break; ib%'{?Q. K1CgM1 v w0P Atu //count++; 3R<VpN){ //if(count>4) PwnfXsR // siteStop(); 4w#:?Y
_\[ } 1Vx>\A !CUM*<iV
xV"~?vD System.err.println("文件下载结束!"); 8lFYk`|g } s1bb2R catch(Exception e){e.printStackTrace ();} uaqV)H } i
hcSS Um nm,(Wdr 2$b JMx> //获得文件长度 wGgeK,*_ public long getFileSize() @k9n 0Qe|F { z:oi@q int nFileLength = -1; n{(,r' try{ ^G14Z5. URL url = new URL(siteInfoBean.getSSiteURL()); <9]J/w+ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); [&pMU) httpConnection.setRequestProperty("User-Agent","NetFox"); 1EWskmp #xh
M&X cb }OjM F int responseCode=httpConnection.getResponseCode(); A [_T~+-G if(responseCode>=400) xg;vQKS6 { Ui'*$W]v processErrorCode(responseCode); ?OFfU 4 return -2; //-2 represent access is error vLpIVNA]]Y } |]eWO#vs U>0bgL y*!8[wASHq String sHeader; e)$a ;6 _wUg+Xs] 4+:'$Nw for(int i=1;;i++) e"|ZTg+U { i,2eoM)FB //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 3LZvlcLb //Utility.log(in.readLine()); {g 4`>^; sHeader=httpConnection.getHeaderFieldKey(i); <6&Z5mpm$w if(sHeader!=null) q;.LK8M { y
~Fi if(sHeader.equals("Content-Length")) JC#5CCz { =w7+Yt nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); lE$(*1H break;
[IgqK5@ } N!./u(b } :}CcWfbT else T%aM~dp break; z.;!Pj } r<B
pX[" } 8WpZ" catch(IOException e){e.printStackTrace ();} @w(X}q1 catch(Exception e){e.printStackTrace ();} Z+ _xX Y+eDE:4 0nZQ"{x Utility.log(nFileLength); 0xH&^Ia1B Y8c,+D,Ww q4g)/x%nc return nFileLength; K%UjPzPWw } W4(GI]`_+
EUW>8kw0 ~-UO^$M- //保存下载信息(文件指针位置) wli H3vA_ private void write_nPos() /4;Sxx- { ji<(}d~L* try{ 4m6/ba output = new DataOutputStream(new FileOutputStream(tmpFile)); =s9*=5r 8 output.writeInt(nStartPos.length); UkcH+0o for(int i=0;i<nStartPos.length;i++) \f7R^;`_<R { K{:[0oIHc // output.writeLong(nPos); x,HD,VQR/ output.writeLong(fileSplitterFetch.nStartPos); [x'D+! output.writeLong(fileSplitterFetch.nEndPos); .\:MB7p } P 1 output.close(); ^91Ae!)d } na@Go@q catch(IOException e){e.printStackTrace ();} BS%pS( catch(Exception e){e.printStackTrace ();}
e ^ZY } u/V&1In yd[4l%G(zS |uI~}pSG //读取保存的下载信息(文件指针位置) |Xt6`~iC private void read_nPos() _na/&J6 { <sSH^J4QqX try{ "\u<\CL DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); &?5me:aU int nCount = input.readInt(); Mkr
&30il[ nStartPos = new long[nCount]; aq\Fh7 nEndPos = new long[nCount]; ibLx'< for(int i=0;i<nStartPos.length;i++) o#>Mf464I
{ l| y.6v nStartPos = input.readLong();
WJ,? 5# nEndPos = input.readLong(); = ?BhtW } 6 X'#F,M input.close(); ^Jw=5ImG } t{,e{oZx catch(IOException e){e.printStackTrace ();} o#WECs> catch(Exception e){e.printStackTrace ();} M(I%QD } )G-u;1rd ;@
G ^eQ
yYrFk^ private void processErrorCode(int nErrorCode) Y#+Ws0wN { S(/^_Y System.err.println("Error Code : " + nErrorCode); y}?PyPz } [("2=Uz; a^_W}gzzd '6\ZgOO9 //停止文件下载 p+0gE5 public void siteStop() vy`
lfbX@ { Jp|eKZ bStop = true; %Y,Ru)5} for(int i=0;i<nStartPos.length;i++) E)wf'x fileSplitterFetch.splitterStop(); PXML1.r$Q e,d}4 jy
+hX= } :yTr:FoF } ;-_ZWk] //负责部分文件的抓取 %gWQ}QF **FileSplitterFetch.java YW"uC\kg| */ <~aKwSF[wW package NetFox; P4.)kK.3q| \UX9[5| +3sbpl2} import java.io.*; Uy*d@vU9c import java.net.*; A8-a}0Gh N1$PW~)Y p'6XF{ public class FileSplitterFetch extends Thread { Zrj#4E1 *!E~4z= %m
[l/,2x String sURL; //File URL d[ _@l long nStartPos; //File Snippet Start Position 0g HV(L?
long nEndPos; //File Snippet End Position 'z{|#zd9 int nThreadID; //Thread's ID w#ZzmO boolean bDownOver = false; //Downing is over r4<As` & boolean bStop = false; //Stop identical !b&+2y2i[W FileAccessI fileAccessI = null; //File Access interface ,*YmXR-" H@9QEj!Y u,{R,hTDS public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 4S4gK { u /DE this.sURL = sURL; q*tGlM@R? this.nStartPos = nStart; bZ:xH48MY this.nEndPos = nEnd; F1BXu@~e( nThreadID = id; Ni|MTE]~ fileAccessI = new FileAccessI(sName,nStartPos);//定位 y4$$*oai& } Xfbr;Jt"< B/o8r4[80 C+"c^9[ public void run() HF"TS* { IP@3R(DS% while(nStartPos < nEndPos && !bStop) U$3DIJVI { 8@LUL)" 6RguUDRQ >P:U9
b try{ q+2A>:| URL url = new URL(sURL); fE_%,DJE( HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); `&'{R<cL httpConnection.setRequestProperty("User-Agent","NetFox"); sI h5cT String sProperty = "bytes="+nStartPos+"-"; r=SCbv httpConnection.setRequestProperty("RANGE",sProperty); Gt
_tL% Utility.log(sProperty); q'4P/2)va fD3'Ye<R !Q5,Zhgr InputStream input = httpConnection.getInputStream(); hc3tzB //logResponseHead(httpConnection); <&2<>*/.y ob'"
^LO\ #XB3Wden2 byte[] b = new byte[1024]; *|y$z+g/ int nRead; WRwx[[e6z while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) LI&E.(: { 3 S*KjY'@ nStartPos += fileAccessI.write(b,0,nRead); pKGhNIj$ //if(nThreadID == 1) O[{/P:a // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); x*RSD,3 } nC!]@lA i$`o,m# 12?!Z Utility.log("Thread " + nThreadID + " is over!"); r :$*pC&{ bDownOver = true; m#i4_F=^b //nPos = fileAccessI.write (b,0,nRead); xx|D#Z}G } |yz
o|%]3 catch(Exception e){e.printStackTrace ();} ;\6@s3 } 60cQ3.e } mEu2@3^E } N~fE&@- ULBEe@s //打印回应的头信息 =wW M\f`= public void logResponseHead(HttpURLConnection con) |=0w_)Fa] { </@5>hx/ for(int i=1;;i++) x
DNu' { @YQ*a4` String header=con.getHeaderFieldKey(i); XjP& if(header!=null) /#SfgcDt //responseHeaders.put(header,httpConnection.getHeaderField(header)); mpCu,l+lo Utility.log(header+" : "+con.getHeaderField(header)); ]7>#YKH. else []aw;\7}Y break; %<+uJ'pj } BfCnyL% } _ `O",Ff Q4L=]qc T QBH|pr
public void splitterStop() -mGG:#yP { 0l& '` bStop = true; 9<toDg_ } @$ Nti> <8Tp]1z (aC=,5N } 8_G6X\q}; 5uahfJk X}i2 qv /* US3)+6 **FileAccess.java 9I2&Vx=DSt *//文件访问(定位,写) .-![ ra package NetFox; ],[<^=| import java.io.*; SZLugyZ2Y ?e4H{Y/M ~piE$"]& public class FileAccessI implements Serializable{ =nc;~u|] M!mw6';k //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 K(lSR RandomAccessFile oSavedFile; OcPgw/
I long nPos; H!hd0. lMh>eX wIR"!C>LE public FileAccessI() throws IOException reArXmU<u { Y?7GFkIP$ this("",0); ~av#r=x } LAnC8O !OQ5AF$
@t1pB]O: public FileAccessI(String sName,long nPos) throws IOException q5hE S { J$5G8<d> oSavedFile = new RandomAccessFile(sName,"rw"); ?Js4\X!uJ this.nPos = nPos; MBw;+'93qf oSavedFile.seek(nPos); vu.?@k@ } V*fv>f:Yv VF";p^ L(cKyg[R public synchronized int write(byte[] b,int nStart,int nLen) 8#tuB8> { oF]]Pl{W int n = -1; _yR_u+5 try{ ;|oft-y oSavedFile.write(b,nStart,nLen); oqysfLJ n = nLen; r-xP6 } )*XWe|H_ catch(IOException e) 94dd )/a { ,%N[FZ`| e.printStackTrace (); H25Qx;(dTk } CueC![pj gp{C89gP SiaW; ks return n; <-b9
)> } .K(9=yh &0y`Gt yEbo`/ ]b } "u^vBd[} .U@u | *c=vEQn- /* 3@ Fa **SiteInfoBean.java <]KQ$8dtD */ trrK6(p package NetFox; z_lKq}^~6 t2OBVzK na8`V`77 public class SiteInfoBean { B0)|sH EirZ}fDJzB #}@8(>T private String sSiteURL; //Site's URL 8q{|nH private String sFilePath; //Saved File's Path L[D+= private String sFileName; //Saved File's Name {~FPvmj& private int nSplitter; //Count of Splited Downloading File k+?gWZ\ GiM-8y~ 7%? bl public SiteInfoBean() 5Rs#{9YE {//nSplitter的缺省值为5 N[\J#x!U //default value of nSplitter is 5 $57Q
g1v this("","","",5); -ZSN0Xk } /FC
HF#yK S2Ez}*plp :;+_<pk public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) .81Y/Gad_ { F<6(Hw#> sSiteURL= sURL; }v|_]
sFilePath = sPath; \<`oW> sFileName = sName; XR7v\rd this.nSplitter = nSpiltter; 0&I*)Zt9x Ly^bP>2i /@1YlxKF } 52Lp_M {5X,xdzR _4L6 public String getSSiteURL() W!O/t^H> { bQq/~ return sSiteURL; +"BJjxG } N *$GP3] !
M CV@5$ ;ZAwf0~ public void setSSiteURL(String value) Il*!iX|23< { 'm6bfS^T sSiteURL = value; Lp(`m=;O } C,eP!_O Nr$78] o9 !DSm[Z1 public String getSFilePath() S#8)N` { D QxuV1 return sFilePath; - QY<o| }
%!nN<% d|Wqx7t]P ]*mUc` public void setSFilePath(String value) p o)lN[v { ElB[k< sFilePath = value; c"lwFr9x7 } m3pDFI W3>9GY90R ]jVE public String getSFileName() xl,%
Z~[ { 2P8wvNDG return sFileName; w5PscEc } oNPvks dC; >FOCdlJ# Ot\[Ya'' public void setSFileName(String value) i?(cp["7 { Q"{Dijc% sFileName = value; .(cpYKFX } .$}z</#! 7* Y*_cH5 5rck]L' public int getNSplitter() #'>)?]tn { Bx5xtJ|! return nSplitter; #9[> } +3-5\t` /"k [T \ZV>5N3hS public void setNSplitter(int nCount) ^(C4Q?[2m { VPT?z nSplitter = nCount; j?|Vx' } `3VI9GmQ } >}~[ew 1irSI,j%z ]nRf%Vi8g /* 57;0,k5Gy **Utility.java M_%KhK */ _wb]tE ~g package NetFox; l#^?sbG 'R-\6;3E>9 `~=z0I public class Utility { WUz69o be NnHaHX }1k?t h public Utility() *Us}E7/"' { 3$YbEl@# 0<@['W}G \rUKP""m } I|&DXF `!I/6d?A //线程睡眠 )=K8mt0qob public static void sleep(int nSecond) YV|_y:- { ~%h
)G#N try{ |?^qsnB Thread.sleep(nSecond); A. tGr(r } <v'[Wl@hq catch(Exception e) q#c+%,Z=C { Nk\ni>Du3 e.printStackTrace (); ,ps?@lD } /"A=Yf } ai?J 2Ul8<${c{ //日志 oVHe<zE. public static void log(String sMsg) `G:1 { P#!gP3 System.err.println(sMsg);
m5N,[^- } VV$#<D<) j?o6>j W>+`e]z public static void log(int sMsg) RiR],Sj { "DvZCf[} System.err.println(sMsg); K7JZUS`C! } v07A3oj } %2I>-0]B G?,3Zn0 %Ul,9qG+ /* .J @mpJdY **TestMethod.java ~ PyS;L} */ #U%HGTE0 package NetFox; .kuNn-$ ALF21e*n k.54lNl public class TestMethod { nPI$<yW7F N3#^Ifn[ 3D@3jyo: public TestMethod() 5p~5-_JX { ///xx/weblogic60b2_win.exe G/3T0d+- try{ /]J\/Z> SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 9@"pR;X@ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ;Q vQ fV4 SiteFileFetch fileFetch = new SiteFileFetch(bean); q#8\BOTP | fileFetch.start(); L |#0CRiN } zq$L[X catch(Exception e){e.printStackTrace ();} +\ "NPK@3 .7Yox1, (r?hD*2r } @IbZci)1
H6nH Y$,~"$su| public static void main(String[] args) W-r^ME { ^4]=D nd% new TestMethod(); V+lS\E. } Z5U\>7@&8 } G^h:#T 点击下载更多相关资料
|