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/* .^%!X!r **SiteFileFetch.java k5%:L2FO */ M!e$h?vB package NetFox; 2X t$KF,? import java.io.*; ;ESuj'*t import java.net.*; 4x'N#m{p U%~L){<V[ [N-t6Z* public class SiteFileFetch extends Thread { e(NpX_8 )K0BH q7r `f9I#B
SiteInfoBean siteInfoBean = null; //文件信息Bean
FB-_a long[] nStartPos; //开始位置 .Y"H{|]Mnh long[] nEndPos; //结束位置 ,%FBELqOW FileSplitterFetch[] fileSplitterFetch; //子线程对象 P,ox))+6 long nFileLength; //文件长度 C)r!;u)AZH boolean bFirst = true; //是否第一次取文件 D/$$"AT boolean bStop = false; //停止标志 f.4m6"1 File tmpFile; //文件下载的临时信息 HJn DataOutputStream output; //输出到文件的输出流 >%~%O`+ *Hnk,?kPq //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) FYe(SV(9 public SiteFileFetch(SiteInfoBean bean) throws IOException k>8,/ AZd { Q]q`+ Z65 siteInfoBean = bean; +H7lkbW //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); _p~lL<q-K[ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ;&N;6V"} if(tmpFile.exists ()) }BpCa6SAs { lUR7zrwJ]o bFirst = false; qDQ$Zq[ read_nPos(); ?>_[hZ } WzC_M>_ else 0pSqk/ { |G5Me nStartPos = new long[bean.getNSplitter()]; ].j;d2xT\ nEndPos = new long[bean.getNSplitter()]; m&H@f: } #sOkD Kug_0+gI 86s.qPB0 "1P>,\Sjg } )rTV}Hk ?~;8Y=O i9NUv3# public void run() Wq+6`o { /GK1}h //获得文件长度 yJ(p-3O5 //分割文件 MmjeFv //实例FileSplitterFetch RE72%w(oM //启动FileSplitterFetch线程 .."= //等待子线程返回 Wn(pz)+Y try{ 4&Q.6HkL if(bFirst) )>]~ Y { Wb_'X |"u nFileLength = getFileSize(); /5ngPHy& if(nFileLength == -1) 36<PI'l#~ { C>d_a;pX System.err.println("File Length is not known!"); ~v2E<S3 } +w
;2k w else if(nFileLength == -2) A{5^A)$ { *20$u% z2 System.err.println("File is not access!"); `Ns$HV } ZYy,gu< else J!$q"0G'WT { ,~@Nhd~k for(int i=0;i<nStartPos.length;i++) 5$,dpLbL { hcvWf\4'#q nStartPos = (long)(i*(nFileLength/nStartPos.length)); >i> %@ } jXBAo for(int i=0;i<nEndPos.length-1;i++) r>=)Y32Q { \;z*j|;B nEndPos = nStartPos[i+1]; { XN"L3A } >AT{\W!N nEndPos[nEndPos.length-1] = nFileLength; Fxu'(xa } A8?uCkG } &*wN@e(c @O7hY8", H1]An'qz, //启动子线程 q;dg,Om fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Pd99vq/ for(int i=0;i<nStartPos.length;i++) w&eX)! { vjy 59m fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), kxJ! #%w siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), d]JiJgfa% nStartPos,nEndPos,i); %1uY Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); hrpql_9. fileSplitterFetch.start(); #S57SD } 2qY`*Y.2 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,\y)k}0lH siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); qRXb9c // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ]-Z="YPY nEndPos = " + nFileLength); _;]
3w // fileSplitterFetch[nPos.length-1].start(); f?_UT}n [
7W@/qqv gK {-eS //等待子线程结束 " "GeO%J8 //int count = 0; fdIO'L_ //是否结束while循环 > .L\ > boolean breakWhile = false; 1 m)WM,L JG%y_
Qy?K ^-,
aB while(!bStop) UN7>c0B { "r6DZi(^K write_nPos(); }B=`nbgIG7 Utility.sleep(500); orB8q(( breakWhile = true; ;(cqaB #$&!)13 l.ri]e for(int i=0;i<nStartPos.length;i++) |[ymNG { *_
2db if(!fileSplitterFetch.bDownOver) -6(u09mb_ { )z'LXy8 breakWhile = false; YQb43Sh` break; t(-`==.R } _ lrCf } >wiW(Ki} if(breakWhile) A
%iZ_h^ break; $F|3VQ~ [whX),3> N? r{Y$x //count++; c2aX_ " //if(count>4) ZXP9{Hh // siteStop(); KTV~g@Jf } 39jnoT R;2tb7 o }%K)R5C System.err.println("文件下载结束!"); =-XI)JV# } 0{0|M8 catch(Exception e){e.printStackTrace ();}
jpcbW } YK[PC]w Q/oe l'O*x 7B@[`>5?%L //获得文件长度 h
rL_. 4 public long getFileSize() 0_d,sC?V { )/BI:) int nFileLength = -1; {\!_S+}{ try{ 3urL*Fw, URL url = new URL(siteInfoBean.getSSiteURL()); biTET|U`$ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); BU-m\Kf) httpConnection.setRequestProperty("User-Agent","NetFox"); ^oNk}:> 0/7y&-/( zJE$sB.f int responseCode=httpConnection.getResponseCode(); OR4ZjogzY if(responseCode>=400) Q{ hXP*5 { 1bW[RK;GE processErrorCode(responseCode); \`:X37n)0q return -2; //-2 represent access is error 2&st/y(hs } %#!pAUP\& %d..L-`]ET >'>onAIL String sHeader; [D[&aA Z^AOV:|m q.s 2x0 for(int i=1;;i++) }!tJ3G { CRK%%;=> //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); A#:5b5R //Utility.log(in.readLine()); |P{K\;- sHeader=httpConnection.getHeaderFieldKey(i); A^/$ |@ if(sHeader!=null) 86[/NTD<- { ,2H@xji
[ if(sHeader.equals("Content-Length")) :JBvCyj4PE { Qqt< nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); %nU8 Ca break; 9.F+)y@ } F$l]#G.@A } K!|%mI8gk else wB(A['k break; $O}:*.{(W } cR0+`& } K OZHz`1! catch(IOException e){e.printStackTrace ();} {fi:]|<1h catch(Exception e){e.printStackTrace ();} W'f{u&< Ey5E1$w%& Z:Hk'|q}I Utility.log(nFileLength); A"wor\( YQU#aOl ET ;=o+\d return nFileLength; }Wxu =b } dA;f`Bi;Q c< ke)@ `4Jlf! //保存下载信息(文件指针位置) *],]E; private void write_nPos() RS'%;B-) { &|t*9D try{ Ol8ma`}Nq3 output = new DataOutputStream(new FileOutputStream(tmpFile)); j5lSu~
output.writeInt(nStartPos.length); m791w8Vr for(int i=0;i<nStartPos.length;i++) 9UD~$_<\ { SKx&t- // output.writeLong(nPos); _7?LINF9 output.writeLong(fileSplitterFetch.nStartPos); /UGH7srx output.writeLong(fileSplitterFetch.nEndPos); Pb05>J3N } &"v h=Z- output.close(); "Dbjp5_ } [C@0&[[ catch(IOException e){e.printStackTrace ();} Mz}yf5{f catch(Exception e){e.printStackTrace ();} -5 -X[`cF } joa|5v' Z-(V fp4 7r=BGoA2E //读取保存的下载信息(文件指针位置) %T3L-{s5 private void read_nPos() AplXl= { vh8{*9+ try{ :G#>): DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); mz\d>0F U. int nCount = input.readInt(); _KSYt32N nStartPos = new long[nCount]; N :E7rtT,M nEndPos = new long[nCount]; &r\pQ}; for(int i=0;i<nStartPos.length;i++) VH3j { `@MY}/
o. nStartPos = input.readLong(); n
GE3O#fv nEndPos = input.readLong(); ht8%A 1| } 8 Zy`Z input.close(); b<UZDy N~ } K*Tj; catch(IOException e){e.printStackTrace ();} `>^2MHF3LT catch(Exception e){e.printStackTrace ();} X9^a:7( } W (N@`^ t\2Lo7[Pu qV57P6< private void processErrorCode(int nErrorCode)
x%kS:! { SWujj,-[ System.err.println("Error Code : " + nErrorCode); q.L0rY! } #S+GI! Z_&6<1,H /p|]*={ //停止文件下载 0m?v@K' l public void siteStop() SOo/~giz| { C!N&uNp@s bStop = true; f]F]wg\_f for(int i=0;i<nStartPos.length;i++) m
S[Vl6 fileSplitterFetch.splitterStop(); _aOisN{ `.PZx%= ax7]>Z=%d" } 7T
\}nX1 } CrHH Ob //负责部分文件的抓取 a%Ky;ys **FileSplitterFetch.java =
E'\ */ SJhcmx+ package NetFox; FilHpnQCt lUXxpv1m U[9`:aV; import java.io.*; aagN-/mgm import java.net.*; Cs$wgm* =VkbymIZ4y OZdiM&Zss public class FileSplitterFetch extends Thread { gf6<`+/ D 6!`p6r+ HpI[Af}l String sURL; //File URL mq@2zE`.( long nStartPos; //File Snippet Start Position @D%H-X long nEndPos; //File Snippet End Position <\]o#w*: int nThreadID; //Thread's ID xcO Si> boolean bDownOver = false; //Downing is over (JS1}T boolean bStop = false; //Stop identical X)iQ){21V FileAccessI fileAccessI = null; //File Access interface *7<5 G{ b;#Z/phix mjUln8Jc public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `"J=\3-> { DZGM4|@<7Y this.sURL = sURL; -E1b5i;f this.nStartPos = nStart; O)|{B>2r this.nEndPos = nEnd; O:'UsI1Y nThreadID = id; j`1%a]Bwc fileAccessI = new FileAccessI(sName,nStartPos);//定位 kmjSSh/t } &i*/}OZz @K`2y'#b GD?4/HkF public void run() 9(k5Irv"'h { ]8*#%^ while(nStartPos < nEndPos && !bStop) XiE { d0YN:lJc ~0 <?^ `(A>7;]: try{ }
y@pAeS, URL url = new URL(sURL); 8"R;axeD HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); \nM$qr'`B httpConnection.setRequestProperty("User-Agent","NetFox"); 6jFc' String sProperty = "bytes="+nStartPos+"-"; C*kGB(H7 httpConnection.setRequestProperty("RANGE",sProperty); o9+"6V|. Utility.log(sProperty); 4bD^Kc4\ 1wpT"5B 26|2r InputStream input = httpConnection.getInputStream(); ?qwTOi //logResponseHead(httpConnection); cA_77#<8 mZsftby} /Y("Q#Ueq byte[] b = new byte[1024]; )`?Es8uW int nRead; +$M%"=tk while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) qQC<oR
{ E,,)?^ g nStartPos += fileAccessI.write(b,0,nRead); tW;?4}JR
//if(nThreadID == 1) kxU<?0 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 86!"b } ;pu68N(B rnWU[U8% "HTp1 Utility.log("Thread " + nThreadID + " is over!"); -.=q6N4 bDownOver = true; "2HSb5b"` //nPos = fileAccessI.write (b,0,nRead); jO\29(_ }
?CKINN catch(Exception e){e.printStackTrace ();} *'=JT# } a=bP } ~`M>&E@Y_/ (h> Jz 37'@,*m` //打印回应的头信息 6#P\DT public void logResponseHead(HttpURLConnection con) jH26-b< { $ )ps~ for(int i=1;;i++) sU"D%G { %''z~LzJ8 String header=con.getHeaderFieldKey(i); rug^_d =B if(header!=null) K8CjZpzq //responseHeaders.put(header,httpConnection.getHeaderField(header)); `WvNN>R Utility.log(header+" : "+con.getHeaderField(header)); K2PV^Y else Q7oJ4rIP break; <I
.p{Z } rJi;"xF8 } 2*:lFvwP 1jU<]09. $!P(Q public void splitterStop() (as'(+B { ;4<CnC** bStop = true; nHxos`Qx } $c4Q6w O<nJbsl_w N\XZ=t^h( } 5qo^SiB. [wB-e~ ')_Gm{A#p /* $#ks`$vM **FileAccess.java +tFm DDx= *//文件访问(定位,写) 1.WdxMpW9 package NetFox; c$aTl9e import java.io.*; (3YqM7cqt F#S^Q` ?d`?Ss;v public class FileAccessI implements Serializable{ 1;E[Ml MK"PCE5^i6 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 zh7#[#>t RandomAccessFile oSavedFile; f&=y\uP] long nPos; Pk444_"= n\k6UD AD$k`Cj public FileAccessI() throws IOException o"D`_ER { Rz%
Px: M this("",0); }m NP[L } e;8>/G ;EstUs3 ;}),6R public FileAccessI(String sName,long nPos) throws IOException ZM"J5}h { z#*M}RR oSavedFile = new RandomAccessFile(sName,"rw"); >xu}eWSz this.nPos = nPos; QW :-q(s oSavedFile.seek(nPos); ^L}fj$
} "(j.:jayd <]I[|4J 7 -Si'[5@ public synchronized int write(byte[] b,int nStart,int nLen) U1(<1eTyu { \.p{~Hv int n = -1; | ZBv;BW try{ T)Z2=5V oSavedFile.write(b,nStart,nLen); 9u<4Q_I` n = nLen; |aef$f5 } XE);oL2xP catch(IOException e) ^yDCX {
>QRpRHtb e.printStackTrace (); 5_";EED } TA;
8mTjf Br 3XY;g{`=q return n; n,sl|hv2U } UP=0>jjbn: @2Xw17[f35 W j2]1A } Z\8TpwD2 -E~pCN(E ~6!{\un
/* F-Mf~+=Dn **SiteInfoBean.java m}w~ d / */ )f]E<*k'E package NetFox; i/QE)"B"q c/.U< N}x\Ll public class SiteInfoBean { }8cL+JJU m@o/ W TNBFb_F private String sSiteURL; //Site's URL xvP<~N- private String sFilePath; //Saved File's Path yiyyw,iy private String sFileName; //Saved File's Name WP&P#ju& private int nSplitter; //Count of Splited Downloading File \y?Vou/ /NFv?~</k W 0^.Dx public SiteInfoBean() A `\2]t$z {//nSplitter的缺省值为5 nokk!v / //default value of nSplitter is 5 v>zeK this("","","",5); $h1`-=\7 } LY}%|w vgRjd1k.\y &L}e&5 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) }.O,P'k { [eL?O;@BD sSiteURL= sURL; 0eq="|n^| sFilePath = sPath; O~yPe. sFileName = sName; +=#sam*i this.nSplitter = nSpiltter; KJc
fbZ~ 9?<WRM3a> HFYN(nz}[ } qPsf`nI7 YCod\} 3 >0kn&pe7#T public String getSSiteURL() hX4&B { `Q?rQ3A} return sSiteURL; 2Jo'!|] } M@@l>"g@ X%Jq9_
:-HVK^$% public void setSSiteURL(String value) i-Ck:-J { 4Z>KrFO sSiteURL = value; --E_s/ } 1~\YJEsb}d Up?w>ly q9rY++Tv public String getSFilePath() 3]DUUXg$ { Wr"-~PP return sFilePath; fsqK(io28 } b||
c^f
bmN'{09@ En$-,8\% public void setSFilePath(String value) l;^Id#N { :'RmT3 sFilePath = value; EGWm0 F_ } nDx}6}5) <PL94 Sw HrHj public String getSFileName() V'(yrz! { d*80eB9P return sFileName; \zioIfHm } >Qg`Us#y 4'JuK{/ A7 _bB:1l?V public void setSFileName(String value) [5>f{L!<T< { `tKrTq> sFileName = value; @R%n & } vd`;(4i#X GUyMo@g Rn6;@Cw public int getNSplitter() Gkci_A* { sd|5oz) return nSplitter; kj_o I5<' } =`fJ Dizc#!IGU >t_5(K4 public void setNSplitter(int nCount) 5etbJk { #(6^1S%
nSplitter = nCount; e=$p( } x=(y } ]hY'A>4Uq ?;NC(Z, apsR26\^ /* G3O`r8oZcJ **Utility.java Gs^hqT;h */ Wj0=cIb package NetFox; %Wy$m?gD Cx(|ZD^ "%$jl0i_c public class Utility { B3 f Kb#T Q;A1&UA2 =+24jHs public Utility() D"kss5>w { v eP)ElX akg$vHhK4 4cC } KLVkPix;$ R5PXX&Q //线程睡眠 NN(ZH73 public static void sleep(int nSecond) t5
:4'%| { n.+%eYM< try{ z8v] Kt & Thread.sleep(nSecond); GZY8%.1{"a } 9z>I&vcX catch(Exception e) :&*Y
Io { *d%"/l^0 e.printStackTrace (); @'UbTB! } wuRB[KLe } -E,
d)O`;$ M\4pTcz{ //日志 SMX70T!'9 public static void log(String sMsg) 3$x[{\ {
{ N|t!G^rP System.err.println(sMsg); G i1Jl" } dw'&Av'
|E 2d1Z;@x 5]_m\ zn= public static void log(int sMsg) xz!b@5DR'% {
S0-f_,( System.err.println(sMsg); >uHU3<2& } RsTz3]`yv } 9g%1^$R ]Rah,4?9f Udj!y$? /* fC6zDTis8A **TestMethod.java z?T;2/_7 */ 6T*MKu package NetFox; ^y"
#2Ov &Pk #v |qUi9#NUo public class TestMethod { 25e*W>SLw OH.lAF4E( 'OrGt_U public TestMethod() 7 'T3Wc { ///xx/weblogic60b2_win.exe )Z4ilpU, try{ c*>8VW> SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); \gz(C`4{j //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ..FEyf SiteFileFetch fileFetch = new SiteFileFetch(bean); 5UWj#|t fileFetch.start(); W4MU^``
} rV6&: \ catch(Exception e){e.printStackTrace ();} :#_Ne?\a@ H?]%b!gQG c5 ^CWk K } ,|5|aVfh Ez()W,6]g ]iI2 public static void main(String[] args) f\p#3IwwH { }%^N9AA8 new TestMethod(); dWc'R wL } oRDqN] } CjFnE 点击下载更多相关资料
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