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/* p*<Jg l **SiteFileFetch.java ]!TE */ lat5n&RP Y package NetFox; n.l#(`($4 import java.io.*; o(tJc}Mh+( import java.net.*; - +a,Ej iQO4IT "~VKUvDu public class SiteFileFetch extends Thread { T={!/y+ k~)CJ6} !60U^\ SiteInfoBean siteInfoBean = null; //文件信息Bean ndFVP;q long[] nStartPos; //开始位置 "M:ui0YP long[] nEndPos; //结束位置 \`y:#N<c FileSplitterFetch[] fileSplitterFetch; //子线程对象 2sGKn
a long nFileLength; //文件长度 :
;8L1' boolean bFirst = true; //是否第一次取文件 ^|<>`i6 boolean bStop = false; //停止标志 7)U
ik}0 File tmpFile; //文件下载的临时信息 3FvVM0l" DataOutputStream output; //输出到文件的输出流 Fx!D:.)/G MsI R ~ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 6|=]i-8 public SiteFileFetch(SiteInfoBean bean) throws IOException k{r<S|PK0 { huZ5?'/Fg siteInfoBean = bean; !Ge;f/@ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); q]1p Q)\'p tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); *$O5.`] if(tmpFile.exists ()) Lx_Jw\YO { qb;b.P?~D$ bFirst = false; g{Av
=66Z read_nPos(); ASdW!4.p } =R:O`qdC4e else %f CkR`: { >K'dgJ245 nStartPos = new long[bean.getNSplitter()]; uG -+&MU? nEndPos = new long[bean.getNSplitter()]; '9QEG/v } %e[E@H 7 #|T"6jJaQ jwjLxt ;HCK iHC } -~c-mt Q&0`(okb m$C1Ea-wnT public void run() </kuJh\ { *ELU">!}G //获得文件长度 aEzf*a|fSV //分割文件 or#]
![7N //实例FileSplitterFetch l[~$9C'ji //启动FileSplitterFetch线程 @|cHDltH //等待子线程返回 E-1u_7 try{ Z;N3mD+\ye if(bFirst) .RmFYV0, { sf$hsPC^ nFileLength = getFileSize(); 6*B%3\z) if(nFileLength == -1) GPni%P#a@0 { ts<\n-f System.err.println("File Length is not known!"); rV\G/)xL } U B+~K/ else if(nFileLength == -2) kxJs4BY0 { 0e&&k System.err.println("File is not access!"); 4IW
fp&Q! } --diG$x. else >!qtue7B { k>i`G5Dh for(int i=0;i<nStartPos.length;i++) CF3x\6.q} { R<fF
^^ nStartPos = (long)(i*(nFileLength/nStartPos.length)); p8XvfM } 4RctYMz for(int i=0;i<nEndPos.length-1;i++) -uN{28;@ { 6|lsG6uf nEndPos = nStartPos[i+1]; 8g:VfzaHu } 0Sk~m4fj( nEndPos[nEndPos.length-1] = nFileLength; w;Azxcw } %AJ9fs4/ } V5-!w0{ %h(%M'm? MtwlZg`c3 //启动子线程 :@5{*o fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; =^p}JhQ for(int i=0;i<nStartPos.length;i++) 9BP'[SM%), { gJp6ReZ# fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), O`Qke
Z} siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), T*@o?U nStartPos,nEndPos,i); 02J(*_o Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _R|_1xa= fileSplitterFetch.start(); EKO'S+~ } :LB*l5\ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Ge({sy>X siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); &0f/F:M // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", &u^]YE{ nEndPos = " + nFileLength); x~uDCbL // fileSplitterFetch[nPos.length-1].start(); 3=U#v< >o13?-S%e > dVhIbG //等待子线程结束 ~-NSIV:f //int count = 0; yp4[EqME //是否结束while循环 p&$PsgR boolean breakWhile = false; Ohgu*5!o oMemF3M UhDf6A`] while(!bStop) l?IeZisX { 94O\M
RQ* write_nPos(); Z,AY<[/C Utility.sleep(500); lO|LvJyx breakWhile = true; y+Nw>\|S Q}^Ip7T 1p5'.~J+Q for(int i=0;i<nStartPos.length;i++) \:F$7 *Ne { fe<7D\Sp@ if(!fileSplitterFetch.bDownOver) Y=|20Y\K { 2%fzRXhu% breakWhile = false; ~tTn7[! break; [z\baL| } &,8Qe; } WI| -pzg if(breakWhile) ,_H H8[& break; ah<p_qe9| %m/lPL OcWKK!A //count++; \:s%;s51 //if(count>4) \z6UWZ // siteStop(); d 4tL } !0? B=yA x6JV@wA& 2gklGDJD System.err.println("文件下载结束!"); z&n2JpLY7 } ;X]B0KFe7 catch(Exception e){e.printStackTrace ();} I)#8}[vK } rSt5@f? vO$cF* m;4ti9 //获得文件长度 ceJ#>Rj public long getFileSize() "9^b1UH< { \tvL<U"' int nFileLength = -1; bh5P98s try{ Wtw,YFT URL url = new URL(siteInfoBean.getSSiteURL()); 6wu`;> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); >`&2]Wc) httpConnection.setRequestProperty("User-Agent","NetFox"); )N~ p4kp r?Mf3U^G PfU\.[l$ int responseCode=httpConnection.getResponseCode(); #>KiX84 if(responseCode>=400) NwOV2E6@OW { 6q'Q?Uw^ processErrorCode(responseCode); ,6MJW#~] return -2; //-2 represent access is error Hmm0H6&u } `peR ,E
0+qC_ISns o:cTc:l) String sHeader; @,= pG ,J+L_S+B~ 9XQE5^ for(int i=1;;i++) W+u,[_ { -0q|AB< //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); wXp:XZ:]T //Utility.log(in.readLine()); QsxvA;7% sHeader=httpConnection.getHeaderFieldKey(i); wmVb0~[ if(sHeader!=null) Q[#8ErUY { 3f^jy( if(sHeader.equals("Content-Length")) c\>I0HH;! { Z2g<"M nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); { Mb<onW break; ng|^Zm% } @8`I!fZ } ORP<?SG55u else G na%|tUz| break; W;R6+@I[ } XNx$^I= } WvF{`N catch(IOException e){e.printStackTrace ();} Q\IViM catch(Exception e){e.printStackTrace ();} ;*zLf 9i 5*A5Y E- ^1c7\"{ Utility.log(nFileLength); RFS}!_t+| aqk$4IG 6~ y' return nFileLength; KC; o } [ /*;}NUv ;Qq_ 6RxI9{ry //保存下载信息(文件指针位置) f^QC4hf0 private void write_nPos() Go:(R {P { !nJl.Y$ try{ am3JzH output = new DataOutputStream(new FileOutputStream(tmpFile)); 2/t; }pw8 output.writeInt(nStartPos.length); =AzkE] for(int i=0;i<nStartPos.length;i++) 05HCr"k { GK,{$SC+= // output.writeLong(nPos); t 3N}): output.writeLong(fileSplitterFetch.nStartPos); t@#5
G*
_Q output.writeLong(fileSplitterFetch.nEndPos); (i(E~^O } n7~3~i`D; output.close(); t>%b[(a } 5CcX'*P catch(IOException e){e.printStackTrace ();} _hl| 3
eW5 catch(Exception e){e.printStackTrace ();}
r90tXx } `EMGrw_ \fC;b"j =,ax"C?pR //读取保存的下载信息(文件指针位置) u=s,bt,"5 private void read_nPos() a""9%./B { t1
9f%d try{ e~)4v DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); >{~xO 6H int nCount = input.readInt(); WdS1v% nStartPos = new long[nCount]; wTR?8$ nEndPos = new long[nCount]; I*o6Bn
|D for(int i=0;i<nStartPos.length;i++) H'k~; { Jpp-3i.F# nStartPos = input.readLong(); '>1M~B nEndPos = input.readLong(); Z)~?foe' } MD1X1,fk input.close(); K\ B!tk } :O@n6%pSL catch(IOException e){e.printStackTrace ();} (JdheCq!x catch(Exception e){e.printStackTrace ();} y_W?7S } (DvGA I NRG~ya > ?xMTO private void processErrorCode(int nErrorCode) !.V_?aYi8 { O"TVxP: System.err.println("Error Code : " + nErrorCode); 2<n18-|OQ } OPq|4xu ,-EN{ed Z|UVH //停止文件下载 *wmkcifF; public void siteStop() nIB eZof { qA!4\v={ bStop = true; /o6ido for(int i=0;i<nStartPos.length;i++)
E>*b,^J7g fileSplitterFetch.splitterStop(); n2AoEbd KgD$P(J:[ H*0g*( } +RpCh!KP } zCA8}](C^ //负责部分文件的抓取 txnH~;( **FileSplitterFetch.java 1#"wfiW */ &u[F)| package NetFox; !E00I0W-h />9`Mbg[G |8k^jq import java.io.*; F:<+}{Av import java.net.*; >#mKM%T2MJ :$yOic}y MU] F'6V public class FileSplitterFetch extends Thread { /i@.Xg@: .L#4#IO W"#<r String sURL; //File URL RB""(< long nStartPos; //File Snippet Start Position <T.R%Jys long nEndPos; //File Snippet End Position <)O#Y76s int nThreadID; //Thread's ID q\!"FDOl4 boolean bDownOver = false; //Downing is over vFLE%z{\o boolean bStop = false; //Stop identical #LR6wEk FileAccessI fileAccessI = null; //File Access interface .*YOyK3H h \`(
O\yYCi( public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 6z~ [Ay { 3ZSU^v this.sURL = sURL; }*-fh$QJ this.nStartPos = nStart; p*cyW l this.nEndPos = nEnd; Mx93D
nThreadID = id; r?0w5I fileAccessI = new FileAccessI(sName,nStartPos);//定位 5B8/"G } *qL2=2 }/NjZ*u y<`:I|y public void run() $ <[r3 { ;*Y+. ?>a while(nStartPos < nEndPos && !bStop) t*BCpC} { 30Q77,Nsny 5$Kv%U .|L9}< try{ 60>g{1] URL url = new URL(sURL); # vy[v22 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;Cx`RF
w httpConnection.setRequestProperty("User-Agent","NetFox"); '5T:*Yh String sProperty = "bytes="+nStartPos+"-"; 'X&"(M httpConnection.setRequestProperty("RANGE",sProperty); yl' IL#n]r Utility.log(sProperty); 5c%Fb:BW= h=YTgJ <R2SV=]Sq# InputStream input = httpConnection.getInputStream(); i+I.>L/S //logResponseHead(httpConnection); }L{GwiDMDl l_
x jsu 1dp8'f5^ byte[] b = new byte[1024]; Z$Qwn int nRead; (l2n%LL]* while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) \:n<&<aVSr { ZS_
z nStartPos += fileAccessI.write(b,0,nRead); T|YMU?4 //if(nThreadID == 1) Z>1yLt@ls // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [["eK9}0 } ] 4*E: ph2
_P[S' Vn/FW?d7 Utility.log("Thread " + nThreadID + " is over!"); 4uE/!dT bDownOver = true; >K%+h)%kI //nPos = fileAccessI.write (b,0,nRead); 4 l+z } V%M@zd?u. catch(Exception e){e.printStackTrace ();} Iz#jR2:yn } ]wbV1Y" } !,7)ZW?*8 r:U<cLT[9 mv*M2NuhT //打印回应的头信息 KUq(&H7 public void logResponseHead(HttpURLConnection con) ^\VVx:] { ]nxSVKE4p for(int i=1;;i++) +y-3tcI) { E`wq`g`H< String header=con.getHeaderFieldKey(i); li')U if(header!=null) {t'SA]|g //responseHeaders.put(header,httpConnection.getHeaderField(header)); \4OU+$m Utility.log(header+" : "+con.getHeaderField(header)); 1F2(MKOo! else gI Gi7x break; KAr5>^<zw } 4>HQ2S{t } !Xq5r8] AQ"rk9Z R\6dvd public void splitterStop() -gb@BIV# { _w5c-\-PUM bStop = true; ;t.)A3 PL } XzBl }4s 56Lt "Z F a63Ud<_a7 } $ O;a~/T j3
@Q 3?&P^{ /* %~Wr/TOt+ **FileAccess.java !i{5mc\ *//文件访问(定位,写) @GQtyl;q package NetFox; ICWHEot import java.io.*; V-dub{K cS#| _ >(W t public class FileAccessI implements Serializable{ fzjtaH? 7zNfq.Ni~ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 r8_MIGM' RandomAccessFile oSavedFile; l>7?B2^<E long nPos; P$/Y9o
\&v)#w "t>H
B6^ public FileAccessI() throws IOException cm>+f ^4?n { ~^g*cA
t} this("",0); %W2
o`W$ } S)^eHuXPI jyRz53 'z};tIOKJk public FileAccessI(String sName,long nPos) throws IOException c8o2* C$ { 8(-N;<Ef2 oSavedFile = new RandomAccessFile(sName,"rw"); # *7ImEN this.nPos = nPos; y(**F8>?xE oSavedFile.seek(nPos); xUB{{8B:L } gp^xl>E )Y=ti~?M( }A<fCm7 public synchronized int write(byte[] b,int nStart,int nLen) 7"])Y {
G/_8xmsU int n = -1; ]rO/IuB try{ VQ2B|v oSavedFile.write(b,nStart,nLen); &:=[\Ws R n = nLen; //}KWz } 3pkx3tp{ catch(IOException e) 2
3A)^j { S<++eu e.printStackTrace (); sFRQFX0XoY } RWGAxq`9f 2&<&q J 6?l|MU"Q. return n; ~:UAL}b{\~ } ~=Fp0l)# Rdy-6 "Qe2U(Un } #\O?|bN'q JZ"XrS0? 4m_CPe /* DV~g **SiteInfoBean.java idZ]d6 */ %wmbFj} package NetFox; o5w = \r\wqz7 ZX40-6#O public class SiteInfoBean { aw1f;&K4 kNUNh[ CN#2-[T private String sSiteURL; //Site's URL T'%Rkag> private String sFilePath; //Saved File's Path k=.pcDX private String sFileName; //Saved File's Name 6p~8(-nG private int nSplitter; //Count of Splited Downloading File .!g TI637yqCU V_H0z public SiteInfoBean() frbeCBP&) {//nSplitter的缺省值为5 k{+Gv}Y //default value of nSplitter is 5 m^1'aO_;q this("","","",5); 9Ui|8e~= } .:TSdusr~ BHIC6i% m/1;os5+8 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) R-BN}ZS { m)xz_Plc sSiteURL= sURL; !;&{Q^} sFilePath = sPath; MZ<BCRB sFileName = sName; (L7%V ! this.nSplitter = nSpiltter; M}!E :bv' *> 7Zc sKL"JA
T } 8FT@TUFb ZTi KU) '<hgc
public String getSSiteURL() fzjZiBK@ { [hKt4]R return sSiteURL; Znh)m } W0N*c*k 2[Bw+<YA` |&0Cuwt public void setSSiteURL(String value) oJor
]QY K { JA6#qlylL sSiteURL = value; t;)`+K#1: } ,gn**E ~5wT|d @DCw(.k* public String getSFilePath() d?1[xv; { 9
IY1"j0O return sFilePath; v\Xyz
) } @"BkLF OC_i, r>7Dg~)V public void setSFilePath(String value) "P8cgj C { ]dQ sFilePath = value; C_V5.6T! } 5,K*IH Q`(.Blgm; V=5v7Y3(j public String getSFileName() Qon>[<]B { HT=-mwa_] return sFileName; 2)+ddel<Z } bRK[u\, 0z=^_Fb '645Fr[lg public void setSFileName(String value) LP5@ID2G { Xe:e./@ sFileName = value; hGlRf_{ } ~mu)Cw 7&
G#&d g,""j` public int getNSplitter() =&v&qne9 { ]sV) '- return nSplitter; e:zuP.R } Q%^!j_# .V\:)\<| Tq!.M1{& public void setNSplitter(int nCount) s_Gf7uC { b0lZb' nSplitter = nCount; Bq#B+JwX } >r5s>A[YC } B/ACU E3,Nc`'m9 f|-%., /* uUI@!)@2 **Utility.java PvqG5-L~W */ " )/febBS package NetFox; Y8%*S%yO vHxLn/ bf-V Q7 public class Utility { i[a1ij= CxJkT2 =@0/.oSD public Utility() qr_:zXsob_ { Jx4"~ 4 %tJ@) !O*uQB } xE%sPWbj )NL_))\ //线程睡眠 29AWg(9?aS public static void sleep(int nSecond) LKe~ { t{RdqAF try{ =6LF_=} Thread.sleep(nSecond); $g!~T!p= } oBZzMTPe catch(Exception e) )-_To&S* { -|nHwSrCZ/ e.printStackTrace (); [nG@
3n } oV Hh } \?rBtD( &WAJ;7f //日志 %P tdFz$ public static void log(String sMsg) i2(lqhaP { l!YjDm{E System.err.println(sMsg); T9=55tpG9 } m*Q*{M_e :Vl2\H=P ;Alw`' public static void log(int sMsg) EwH_k { <\C/; System.err.println(sMsg); }qn@8} } i*-L_!cc: } H_<hZUB >lIQM3 /$,~|X;& /* EoD[,:* **TestMethod.java Ec;{N */ STY\c5 package NetFox; :r,o-D `'
"125T l&LrcM public class TestMethod { UpIt"+d2& yCLDJ%8 |#_`aT" public TestMethod() Eggdj+ { ///xx/weblogic60b2_win.exe wEJ) h1=)^ try{ :Mq-4U.e SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); q=(.N>% //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Y] "_} SiteFileFetch fileFetch = new SiteFileFetch(bean); ZAcH`r* fileFetch.start(); #Kd^t=k } &]mZp& catch(Exception e){e.printStackTrace ();}
re;^, HHU0Nku@ho Q1?09 } sGdlS&08( X=U >r g<&n V>wF public static void main(String[] args) -p\uW0XA { N!
N>/9 new TestMethod(); G(6MLh1 } v;m}<3@' } tjIT4 点击下载更多相关资料
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