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/* fPG3$<Zr **SiteFileFetch.java WpC9(AX5g */ YAd%d|Q package NetFox; {N@Pk[! import java.io.*; G}@a]EGm import java.net.*; )g`~,3G t<e3EW@>> &@'+h*
b public class SiteFileFetch extends Thread { @GF3g= a?*pO`<J{ LXf|n SiteInfoBean siteInfoBean = null; //文件信息Bean 40 zO4 long[] nStartPos; //开始位置 mcxD#+H 3 long[] nEndPos; //结束位置 )QI#szv6 FileSplitterFetch[] fileSplitterFetch; //子线程对象 7nZ3u_~ long nFileLength; //文件长度 Nwk^r75l q boolean bFirst = true; //是否第一次取文件 \Npvm49 boolean bStop = false; //停止标志 ow#8oUf= File tmpFile; //文件下载的临时信息 ]N:Wt2
DataOutputStream output; //输出到文件的输出流 E|W7IgS N\Ab0mDOV. //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) z</^qy public SiteFileFetch(SiteInfoBean bean) throws IOException KIY9?B=+ { o 9d|XY_ siteInfoBean = bean; ul!q)cPb{ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); X#o;`QM tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); _.SpU`>/f if(tmpFile.exists ()) vILgM\or {
=)J<R; bFirst = false; l/A!ofc#) read_nPos(); 6Y9<| . } W?n/>DML else M*aYcIU(( { ^grDP*;W nStartPos = new long[bean.getNSplitter()]; UkC'`NWF* nEndPos = new long[bean.getNSplitter()]; *T:jR } m",G;VN N[N4!k )!$ ."`||@| 7t+H94KG7 } t;_1 /mt nIqF:6/ A:5P public void run() X,D ]S@ { w{GEWD{& //获得文件长度 kB=5=#s //分割文件 %Lq}5zB //实例FileSplitterFetch ypx`!2Q$ //启动FileSplitterFetch线程 A>\3FeU>UC //等待子线程返回 !(y(6u# try{ SBY0L. if(bFirst) \!*F:v0g^ {
&%T*sR nFileLength = getFileSize(); juxAyds if(nFileLength == -1) cG4}daK]d { (Z8wMy&: System.err.println("File Length is not known!"); ed#>q;jX } ?<^^.Si else if(nFileLength == -2) n;y[%H!g { #z}0]GJKj System.err.println("File is not access!"); m/`L3@7Tt } EF;B)y= else .ZM0cwF { &"Fz)} for(int i=0;i<nStartPos.length;i++) &LQfs4}a, { ,2P/[ : nStartPos = (long)(i*(nFileLength/nStartPos.length)); ^Zlbs
goZ } zR?1iV.] for(int i=0;i<nEndPos.length-1;i++) qipS`:TER { 1+Vei<H$ nEndPos = nStartPos[i+1]; MPLeqk$; } tZ:fOM nEndPos[nEndPos.length-1] = nFileLength; ACF_;4%& } .:tR*Kst`7 } "WH
&BhQYD wkT4R\H > [5Zi\'~UH) //启动子线程 nWUau:% fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; epcvwM/A for(int i=0;i<nStartPos.length;i++) P#"_H}qC* { T7N\b]?j@Y fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,QLy}=N siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), tR_DN nStartPos,nEndPos,i); o_ r{cnu Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^$<:~qq! fileSplitterFetch.start(); }{v0}-~@ } 4 &0MB>m // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ,,-j5Y siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); M->#WGl\B // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", f|2QI~R nEndPos = " + nFileLength); ~O
4@b/!4 // fileSplitterFetch[nPos.length-1].start(); i(xL-&{ zoj
w^%W S(: |S( //等待子线程结束 Az/P;C= //int count = 0; k0xm- //是否结束while循环 @"m+9ZY boolean breakWhile = false; 9xL`i-7] 2-^['R w7~&Xxa/
while(!bStop) _HkQv6fXpE { F0'8n6zj write_nPos(); Hq,znRz~` Utility.sleep(500); ;9qwB breakWhile = true; !0cb f&^: xww\L
&y OGW0lnQ/ for(int i=0;i<nStartPos.length;i++) u2*."W\ { $C8s if(!fileSplitterFetch.bDownOver) q2M%AvR { N]G`] breakWhile = false; .G|U#%"6x break; o^u}(wZ{ } 4hUUQ;xj } Nl{on"il if(breakWhile) mHNqzdaa break; ~~#/jULbV SnoEi~Da u#0EZ2># //count++; H)K.2Q //if(count>4) oB+@05m8 // siteStop(); ]Yf8 } mQ\oR| TaZlfe5z r6kQMFA System.err.println("文件下载结束!"); N
Q}5' } +sXnC\ catch(Exception e){e.printStackTrace ();} 07Oagq( } ]jV1/vJ-! u<HJFGLzI [LS s|f //获得文件长度 qtp-w\#S$ public long getFileSize() C(}Kfi@6N { dkZ[~hEQG- int nFileLength = -1; Rtai? try{ }$:ha> URL url = new URL(siteInfoBean.getSSiteURL()); EtDzmpJR> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); O! w&3 p httpConnection.setRequestProperty("User-Agent","NetFox"); ?$b*)< 7[8d-Sf24{ g]._J int responseCode=httpConnection.getResponseCode(); 5~"m$/yE if(responseCode>=400) P2 +^7x? { xic&m5j
m processErrorCode(responseCode); #}8gHI-9% return -2; //-2 represent access is error L(BL_ } AUR{O 5ma~Pjt8} hy@e(k|S]U String sHeader; >
Cx;h= _Tf0L<A'R q_:B=w+bC for(int i=1;;i++) -J++b2R\% { 'zQp64]F //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Y>K3.*. //Utility.log(in.readLine()); ;*e$k7}F sHeader=httpConnection.getHeaderFieldKey(i); I0sw/,J/Z if(sHeader!=null) 8FBXdk?A { wQX%*GbL2 if(sHeader.equals("Content-Length")) 0f,Ii_k bT { <:~'s]`zf nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); d'p@[1/ break; nAyyjd3!S } lUHpGr|U% } E\~!E20^ else tEllkHyef break; Q_A?p$%;L } It8@Cp.dU } <Kq!)) J' catch(IOException e){e.printStackTrace ();} -)E6{ catch(Exception e){e.printStackTrace ();} +Z/aG k; $9<P3J 1 y?V#LW[^E Utility.log(nFileLength); {c=H#- A &fwb?Vn4 u]t#Vf-$u return nFileLength; o&rNM5: } )n$RHt+:> T28Q(\C:} WO{9S%ck //保存下载信息(文件指针位置) E XQ3(:& private void write_nPos() $-_@MT~ { Ga$EM try{ $:*/^)L output = new DataOutputStream(new FileOutputStream(tmpFile)); *iujJi output.writeInt(nStartPos.length); ]q@W(\I for(int i=0;i<nStartPos.length;i++) MJ`BlE,Fmb { zY\MzhkX, // output.writeLong(nPos); | PzXN+DW output.writeLong(fileSplitterFetch.nStartPos); 6s&%~6J, output.writeLong(fileSplitterFetch.nEndPos); {i:Ayhq~& } EN~ha:9 output.close(); |dk9/xdX } = k>ygD_ catch(IOException e){e.printStackTrace ();} 2(NN QU@Uz catch(Exception e){e.printStackTrace ();} O`='8'6zW\ }
c|~f[ 8Sg:HU\ WJw
%[_W //读取保存的下载信息(文件指针位置) *Duxabo? private void read_nPos() -wn(J5NnR { Xq.GvZS` try{ A*+KlhT
DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 8J+:5b_? int nCount = input.readInt(); F$>^pw nStartPos = new long[nCount]; RyN?Sn5) nEndPos = new long[nCount]; ;NrU|g/ksX for(int i=0;i<nStartPos.length;i++) l|~SVk| { -hpMd/F nStartPos = input.readLong(); 1$rrfg nEndPos = input.readLong(); 7D wf0Re` } oA$]% input.close(); I=wA)Bli1p } DX@*lM catch(IOException e){e.printStackTrace ();} K7gqF~5x~ catch(Exception e){e.printStackTrace ();} vhu5w#]u* } :X~{,J )x&OdFX &oqzQ+H private void processErrorCode(int nErrorCode) UNd+MHE74I { &io*pmUm6 System.err.println("Error Code : " + nErrorCode); %%Z|6V74 } >PK\bLEo D*o[a#2_ 8i?h{G IMV //停止文件下载 h**mAa0fo public void siteStop() FQ6{NMz,h { gjhWoZV bStop = true; dFVm18 for(int i=0;i<nStartPos.length;i++) Z\P&i# fileSplitterFetch.splitterStop(); 9x[|75}l rD SUhO{V PEHaH"|([= } s9}V nNr } Fwv(J_'q //负责部分文件的抓取 Xw[|$#QKM **FileSplitterFetch.java +b6kU{ */ '9#h^. package NetFox; 5$p7y: NHq*&xy 5qx$=6PT import java.io.*; [}!obbM import java.net.*; h>A}vI*: c<j+" .jjvS public class FileSplitterFetch extends Thread { !aub@wH3 qT+:oMrTSm \Z%V)ZRi= String sURL; //File URL %["V "{ z long nStartPos; //File Snippet Start Position "<I*ViZ long nEndPos; //File Snippet End Position ISl-W1u} int nThreadID; //Thread's ID 7BDoF!kCx boolean bDownOver = false; //Downing is over */yR_f boolean bStop = false; //Stop identical {QRrAi FileAccessI fileAccessI = null; //File Access interface 8]-c4zK a)GT\1q p[M*<==4 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException A('_.J= { O*zF` 9 this.sURL = sURL; fA>FU/r this.nStartPos = nStart; #'jd.'> this.nEndPos = nEnd; R-2V C nThreadID = id; >
:
;*3 fileAccessI = new FileAccessI(sName,nStartPos);//定位 SH${ \BKup } SvD^'(
x T1Y_Jf*KJ l&1R`g cW public void run() nofK(0TF { juc;]CHt' while(nStartPos < nEndPos && !bStop) geB]~/-p { Ue22,Pp6 8f0Ytfhw 4?)-;Hx_X try{ t&99ZdE URL url = new URL(sURL); &;O)Dw HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); IrZ!.5%tV httpConnection.setRequestProperty("User-Agent","NetFox"); P<WCW3!JZ String sProperty = "bytes="+nStartPos+"-"; *n h.&Mv| httpConnection.setRequestProperty("RANGE",sProperty); 2gnmk
TyF Utility.log(sProperty); ZhpbbS Z#P:C":e R8<'m
InputStream input = httpConnection.getInputStream(); l
/\n7: //logResponseHead(httpConnection); M;Dk$B{;R EsR$H2" '6&a8&: byte[] b = new byte[1024]; 9s}y*Vp int nRead; B Ctm05 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 8S_v} NUm { L&2 Zn{#` nStartPos += fileAccessI.write(b,0,nRead); z1u1%FwOfM //if(nThreadID == 1) n!K<g.tjW // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {v>orP? } D7"RZF\) YzD6S*wb {KO+t7'Q Utility.log("Thread " + nThreadID + " is over!"); PLmf.hD \ bDownOver = true; v!EE[[ //nPos = fileAccessI.write (b,0,nRead); Q7b$j\;I } &7CAxU;i3 catch(Exception e){e.printStackTrace ();} wUbs9y< } JM-rz#;1 } (?7=$z!h gZD,#D.hR dUg| {l //打印回应的头信息 zz1e)W/ public void logResponseHead(HttpURLConnection con) ]VU a$$ { g,N"o72) for(int i=1;;i++) IfdgMELk { MSw:Ay[9 String header=con.getHeaderFieldKey(i); *j0kb"# if(header!=null) LYv$U;*+ //responseHeaders.put(header,httpConnection.getHeaderField(header)); hD5G\TR. Utility.log(header+" : "+con.getHeaderField(header)); mSu1/?PS else jK{)gO break; \:/:S"- } 3Y}X7-|)Z } aMaFxEW *75?%l (t\
F>A public void splitterStop() '[nH]N { 3:;2Av2(X. bStop = true; j\Z/R1RcW } X-&U-S; |rDv!m 0Q1sJDa. } </OZ,3J= dfmxz7V -8]M
,,? /* 85Hb~|0 **FileAccess.java lQolE P.pc *//文件访问(定位,写) x*" 0dYH package NetFox; LS=HX~5C import java.io.*; 'L"dM9#> )fo9Qwe Y^Olcz public class FileAccessI implements Serializable{ D/$$"AT -m.SN>V //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 f;k'dqlv RandomAccessFile oSavedFile; >%~%O`+ long nPos; *Hnk,?kPq FYe(SV(9 k>8,/ AZd public FileAccessI() throws IOException `n#
{} % { zMUifMiAj this("",0); _p~lL<q-K[ } ;&N;6V"} _;Q1PgT 3\xvy{r public FileAccessI(String sName,long nPos) throws IOException PV*U4aP { nzdJ*C oSavedFile = new RandomAccessFile(sName,"rw"); St6U this.nPos = nPos; YuZxKuGy oSavedFile.seek(nPos); -}B&>w,5 } k8}*b&+{vz g)<t=+a Lwg@*:`d public synchronized int write(byte[] b,int nStart,int nLen) 0koC;(<n { uH}cvshv int n = -1; :CQ-?mT^LA try{ _dT,%q oSavedFile.write(b,nStart,nLen); /idQfff n = nLen; m{/?6h 1 } b|cUKsL5 catch(IOException e) ng-g\&- { z]NzLz9VfL e.printStackTrace (); `|1#Vuk } |g3a1El F0O/SI(cA a|*{BlY return n; ov{ } uIG,2u, ZE ())W" wgK:^DP } 6w
d0" h|_E>6d) Sc!{
o!9\ /* qjsS2,wM **SiteInfoBean.java [dK5kO */ j0p'_|)( package NetFox; ] Fx9!S 1]L 0r C0xjM0 public class SiteInfoBean { X
8V^ t,*hxzD" jXBAo private String sSiteURL; //Site's URL r>=)Y32Q private String sFilePath; //Saved File's Path \;z*j|;B private String sFileName; //Saved File's Name { XN"L3A private int nSplitter; //Count of Splited Downloading File [>IAS> m'))prl IpX>G]"-C public SiteInfoBean() ^6*2a(S& {//nSplitter的缺省值为5 d66
GO];" //default value of nSplitter is 5 73kF=*m this("","","",5); <p<J;@ } $"d< F3k 2L#$WuM~^ LRqBP|bjCD public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) U2=PmS P { t;7 tuq
sSiteURL= sURL; v-;j44sB sFilePath = sPath; p#VA-RSUQ| sFileName = sName; N|n"JKw) this.nSplitter = nSpiltter; ,4bqjkX5q "T`Q, xwZcO } H'fmQf a9CY,+z5B iRo/ ~( public String getSSiteURL() qSRE)C=) { wHSa s[4k return sSiteURL; l-Hp^|3Wq } ggr\nY PVGvj c pDGX$1O" public void setSSiteURL(String value) X>Cl{. { B|Y6;4? sSiteURL = value; (mHCK5 } 481SDG[b dqU
bJc] ?mdgY1 public String getSFilePath() a#iJXI { qNI2+<u)j return sFilePath; ('q u#.' } (Kl96G<Wej <r_L- F;5S2:a@Z public void setSFilePath(String value) g$c\(isY; { YQb43Sh` sFilePath = value; ;naD`([ } _ lrCf >wiW(Ki} A
%iZ_h^ public String getSFileName() 9%>GOY { xEt".K return sFileName; ={[s)G } VKcO]_W1 Mqu>#lL q*,g public void setSFileName(String value) (E v/R%Z { wAC*D=Qj sFileName = value; bLrC_ } 2f'3Vjp~G | |=q"h3( &tT*GjPwg; public int getNSplitter() W'l
&rm@ { `Pa)H return nSplitter; cNi)[2o7 } M_wqb'= {H
FF|Dx O?<R.W<QI public void setNSplitter(int nCount) oxN~(H)/ # { ['p%$4i$ nSplitter = nCount; "PM!03rb } !;";L5() } ;9>(yJI+ biTET|U`$ BU-m\Kf) /* ^oNk}:> **Utility.java 0/7y&-/( */ zJE$sB.f package NetFox; Bvke@|]kW F!FXZht$P ykY#Y}?^ public class Utility { 0'Kbh$LU 8!a6)Zeux Q;m:o8Q5 public Utility() #/u% sX`#y { &/K:zWk3mx 7X\azL !&f(Xs } vYT%e:8)q Nqih LUv //线程睡眠 E'|@hL-jn public static void sleep(int nSecond) CAGaZ rx { .G"UM>.}d try{ GtQ$`~r Thread.sleep(nSecond); pkd#SY } JI{|8)S catch(Exception e) ~*WSH&ip { [ugBVnma e.printStackTrace (); fmuAX w> } QLx]%E\ } s bf\;_! *h=|KOS //日志 >Qk4AMIO public static void log(String sMsg) K8,fw-S% { eK%~`Y System.err.println(sMsg); }]0f -} } 9mdp\A h?f)Bt}ry 3B }Oy$p public static void log(int sMsg) ,uEi*s> { +9S_H( System.err.println(sMsg); ! }u'% } bERYC| } ET ;=o+\d gwvy$H Q+d9D1b /* pNY+ E5 **TestMethod.java yqdhLX|Mk */ wYTF:Ou^5~ package NetFox; 7O3 \ a78&< [I*BEJ;W' public class TestMethod { .Rq|F /ESmQc:DWB yFp8 > public TestMethod() }@-4*5P3 { ///xx/weblogic60b2_win.exe B(<;] try{ ekB!d
SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); >P7|-bV //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); *,w9#?2x SiteFileFetch fileFetch = new SiteFileFetch(bean); [[{y?-U fileFetch.start(); tx=~bm"*? } wO6`Ap
t1: catch(Exception e){e.printStackTrace ();} Etk`>,]Y>y &%QtUPvr9 B dHLow } _<?lP$Xr 92}UP=RW! VH&6Tm1 public static void main(String[] args) V,=V { F<wwuCbF new TestMethod(); &lg+uK } !C&!Wj } A;~u"g 'z& 点击下载更多相关资料
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