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/* y'ULhDgq^B **SiteFileFetch.java )N!-g47o%# */ SS;[{u! package NetFox; _]W
{)=ap import java.io.*; S^;D\6(r import java.net.*; 5!Y51R^c P+r-t8 8Qtd, public class SiteFileFetch extends Thread { kWs"v6B m{itMZ@ |` gSkv SiteInfoBean siteInfoBean = null; //文件信息Bean >,22@4 long[] nStartPos; //开始位置 6A$
\I44 long[] nEndPos; //结束位置 bM`7>3
d7E FileSplitterFetch[] fileSplitterFetch; //子线程对象 c%,~1l long nFileLength; //文件长度 ^M60#gJ boolean bFirst = true; //是否第一次取文件 o)<c1\q boolean bStop = false; //停止标志 NYbeIfL File tmpFile; //文件下载的临时信息 %j9'HtjEa DataOutputStream output; //输出到文件的输出流 s UX%{|T_ V 4Y w"J //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) M5DW!^ public SiteFileFetch(SiteInfoBean bean) throws IOException /lBx}o' { Wx&gI4~ siteInfoBean = bean; mup<%@7m //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); NbyVBl0= tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Zr`pOUk!4 if(tmpFile.exists ()) ; n tq% { Z~O1$,Z bFirst = false; P)he3 read_nPos(); z)$X/v } W|S{v7[l else B16,c9[ { k!Y7Rc{" nStartPos = new long[bean.getNSplitter()]; x O`#a= nEndPos = new long[bean.getNSplitter()]; ~5e)h_y } y#-mj,e vMOI&_[\z (gd+-o4 $J8?!Xg } Vo*38c2 XI#1) DpG|Kl|d public void run() FOz7W { ,[6N64fy //获得文件长度 w#EP`aM2$= //分割文件 |> mx*G //实例FileSplitterFetch iXl6XwWT%8 //启动FileSplitterFetch线程
G:TM k4 //等待子线程返回 :_R[@?c try{ tz{W69k+ if(bFirst) ~s_n\r&23 { x^_(gve: nFileLength = getFileSize(); "5 \<. if(nFileLength == -1) ,1-n=eTQ { o /uA_19 System.err.println("File Length is not known!"); E3bS Q } @k_xA-a else if(nFileLength == -2) $GI2rzh { ROZOX$XM System.err.println("File is not access!"); )%e`SGmp } D,FX&{TYU else 6ybpPls { 6|q\ M for(int i=0;i<nStartPos.length;i++) -*;-T9 { [se J'Io nStartPos = (long)(i*(nFileLength/nStartPos.length)); /:-8 ,` } *_Y{wNF* for(int i=0;i<nEndPos.length-1;i++) dW
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o\>= { e
C\;n nEndPos = nStartPos[i+1]; [kfLT::mT } nt$VH nEndPos[nEndPos.length-1] = nFileLength; Jb.
V4 } \^7D%a=;C } $]eU'!2) obYXDj2 3C8cvi[IS //启动子线程 <PCa37 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; N%8O9Dp8; for(int i=0;i<nStartPos.length;i++) 6I,^4U { !JZ)6mtlr fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 4.?tP7UE siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), tPDd~fOk nStartPos,nEndPos,i); ZaxBr Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); \UKr|[P fileSplitterFetch.start(); {(o$? = } QFn .<@ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9 F"2$; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); R*m=V{iu` // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ZHQa}C+ nEndPos = " + nFileLength); ZbS*zKEW // fileSplitterFetch[nPos.length-1].start(); eUa2"=M & ,KxE(C nJEm&"AI //等待子线程结束 zR)9]pJ- //int count = 0; ^zdZ"\x //是否结束while循环 l Je=z boolean breakWhile = false; 7WuhYJbf
nYfZ[Q>v ;xp^FKP while(!bStop) xW`,@a} { B2}|b^'I write_nPos(); MoIq)5/ Utility.sleep(500); 6rBXC <Z breakWhile = true; FQc8j:' F(?A7 q-3,p. for(int i=0;i<nStartPos.length;i++) <F~0D0G { s\7]"3:wD if(!fileSplitterFetch.bDownOver) 2m$\]\kCUv { dd $}FlT breakWhile = false; RtE2%d$JT break; @"B"*z-d } t-, =sV
} e.8(tEqZ1 if(breakWhile) cjTV~(i'4A break; 1 uKWvp0\ 8SJi~gV zOV.cI6fZz //count++; fT:a{ //if(count>4) _]g?3Gw7! // siteStop(); ]!v:xjzT } "JHdF& @wzzI 7}C m[k@\xS4e System.err.println("文件下载结束!"); 5]c'n } TB!z:n catch(Exception e){e.printStackTrace ();} 4 w$f- } L=Pz0 ?b}d"QsmU W7k0!Grrl //获得文件长度 ncF|wz public long getFileSize() SHc<`M'+ { >= G{.H int nFileLength = -1; %xa.{`}`U try{ Oa8lrP`( URL url = new URL(siteInfoBean.getSSiteURL()); 6/A#P$G HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); -#9Hb.Q; httpConnection.setRequestProperty("User-Agent","NetFox"); x4r=ENO)q Py&DnG'H XN*?<s3 int responseCode=httpConnection.getResponseCode(); #u<^ if(responseCode>=400) .Mn+Bd4f { c^4^z"Mo` processErrorCode(responseCode); X =sC8E dx return -2; //-2 represent access is error 1;e"3x" } ??4#)n
k M9_G E3p3DM0F$ String sHeader; /b$0).fj@, ~v
/N G BdK2I!mm for(int i=1;;i++) $r>\y (W { j@j%)CCM //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); *@E Itj ` //Utility.log(in.readLine()); b1("(,r/` sHeader=httpConnection.getHeaderFieldKey(i); y<53xZi if(sHeader!=null) p1-bq: { )]\?Yyg] if(sHeader.equals("Content-Length")) vf|lF9@U { ,b&-o?.{ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); )_MIUQ% break; %lr<; } 9JG9;[ }
R%(ww else `|["{j}^ break; #[4Mw M3 } ]m>N!Iu } ~miRnW*x catch(IOException e){e.printStackTrace ();} (Wj2%*NT catch(Exception e){e.printStackTrace ();} |L@9qwF dzK]F/L] Z5oX "Yx Utility.log(nFileLength); QGWfF,q Eyv|~D Ab"mX0n return nFileLength; bZ/4O*B } $Iu N(# MzF9 &{N }G:5P3f //保存下载信息(文件指针位置) f;Iaf#V_ private void write_nPos() q,<AW> { Ws+Zmpk% try{ *zf@J' output = new DataOutputStream(new FileOutputStream(tmpFile)); AADvk_R output.writeInt(nStartPos.length); L$ nFRl& for(int i=0;i<nStartPos.length;i++) vPVA^UPNV { Gk.;<d // output.writeLong(nPos); cY}Nr#%s@U output.writeLong(fileSplitterFetch.nStartPos); 6Y#V;/gK!5 output.writeLong(fileSplitterFetch.nEndPos); !k=>Wb8n2 } m4U7{sE output.close(); [jOvy>2K] } 8?n6\cF catch(IOException e){e.printStackTrace ();} xk1pZQ8c catch(Exception e){e.printStackTrace ();} W|go*+`W% } t`"]"Re m[@7!.0=
$] js0)> //读取保存的下载信息(文件指针位置) &"90pBGK private void read_nPos() U9om}WKO { B{D!5{t try{ &DqeO8?Q DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); n..9F$a int nCount = input.readInt(); \XG18V& nStartPos = new long[nCount]; nFVQOr; nEndPos = new long[nCount]; wYf9&}k\4 for(int i=0;i<nStartPos.length;i++) =4;GIiF@ { H:~41f[ nStartPos = input.readLong(); K1P3
FfG nEndPos = input.readLong(); )8H5ovj. } n9J.]+@J input.close(); J,8Wo6 } xK`.^W catch(IOException e){e.printStackTrace ();} </K"\EU catch(Exception e){e.printStackTrace ();} |JpLMUG } QfI)+pf G3j&8[ NFc@Kz<H private void processErrorCode(int nErrorCode) Y)x(+# { T~nm Eap System.err.println("Error Code : " + nErrorCode); htn "rY( } xD f<@ IC-k zc<C %t[~y //停止文件下载 WQ\H2go public void siteStop() ZMSP8(V { MP Ma bStop = true; 7Y:~'&U| for(int i=0;i<nStartPos.length;i++) "z
`&xB fileSplitterFetch.splitterStop(); UB3b LL~bq(b 8:j8>K*6 } 4v+4qyMyE } K-$gTV //负责部分文件的抓取 ~-+lZ4} **FileSplitterFetch.java $<)k-Cf */ :)GtPTD package NetFox; 1D
/{Y M(,npW *o8DfZ import java.io.*; P:z 5/??2S import java.net.*; O87Ptr8 0K-jF5i$` <r*A(}Y public class FileSplitterFetch extends Thread { Y4PB&pZ$O2 w5I
+5/I +jcg[|-'/ String sURL; //File URL W/O&(t long nStartPos; //File Snippet Start Position W/PZD ( long nEndPos; //File Snippet End Position Nl_Sgyx,\ int nThreadID; //Thread's ID tqY) boolean bDownOver = false; //Downing is over O!!Ne'I boolean bStop = false; //Stop identical z}'*zB> FileAccessI fileAccessI = null; //File Access interface J4
yT| *$nz<? #D"fCVIS public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ;Ry
)^5Q { z5CZ!"&v this.sURL = sURL; q9j9"M' this.nStartPos = nStart; Z:|2PQ4 this.nEndPos = nEnd; hB#z8D nThreadID = id; eATX8`W fileAccessI = new FileAccessI(sName,nStartPos);//定位 pIh%5ZU } [c@14]e K
(yuL[p` ]XEkQ public void run() N
3)OH6w" { *pN,@ZV$ while(nStartPos < nEndPos && !bStop) Ws[[Me,= { <$s G]l!\ 8$!/Zg !m"(SJn" try{ G`NH~C URL url = new URL(sURL);
^a@Vn\V1 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); QKYGeT7&Y' httpConnection.setRequestProperty("User-Agent","NetFox"); iYj+NL String sProperty = "bytes="+nStartPos+"-"; ^'DrU<o httpConnection.setRequestProperty("RANGE",sProperty); {5U;9: sO6 Utility.log(sProperty); 'z\K0 zV {[0s q2}<n'o+ InputStream input = httpConnection.getInputStream(); ~:."BA //logResponseHead(httpConnection); mqGp]'{ |y@TI e.eQZ5n~q` byte[] b = new byte[1024]; )J+vmY~& int nRead; 0(VQwGC[ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) u]P0:)tS. { vkan+~H nStartPos += fileAccessI.write(b,0,nRead); *ms?UFV[r //if(nThreadID == 1) IMzhEm // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 5Bw } o>{+vwK 'sI= *c
xz YvD{> Utility.log("Thread " + nThreadID + " is over!"); +x$;T*0 bDownOver = true; D,+I)-k< //nPos = fileAccessI.write (b,0,nRead); vyT$IdV2 } )K\w0sjR catch(Exception e){e.printStackTrace ();} .H+`]qLkL } NS"hdyA } O&]Y.Z9,A m*h
d%1D XiI@Px?FL //打印回应的头信息
]SpUD public void logResponseHead(HttpURLConnection con) |{HtY { C^RO@kM for(int i=1;;i++) $@q)IK%FDL { ,dKcxp~[ String header=con.getHeaderFieldKey(i); *nD yB.( if(header!=null) [Z0 &`qz //responseHeaders.put(header,httpConnection.getHeaderField(header)); #X7fs5$& Utility.log(header+" : "+con.getHeaderField(header)); /AWV@' else J\XYUs break; 3+"z } ?f[#O&# } eu~WFI YVZm^@ZVV y!fV+S, public void splitterStop() g+p?J.+ { Ph2jj,K bStop = true; #)_4$<P*' } XX~~SvSM 30g-J(Zg CD%wi:C%| } w<N[K> l,HM m|oU Ll lyx20U /* 2J9_(w
**FileAccess.java tlu-zUsi *//文件访问(定位,写) &H;0N"Fn package NetFox; 828E^Q"< import java.io.*; UyBI;k^]
+j&4[;8P: _!H{\kU public class FileAccessI implements Serializable{ [Hy0j* $`x4|a8- //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 wgpu]ooUF& RandomAccessFile oSavedFile; M?x/C2| long nPos; ~\<Fq \.x g5lf-}? mu04TPj public FileAccessI() throws IOException $0V<wsVM { DY'D]*'7$ this("",0); 8-UlbO6 } X0+$pJ60 K/KZ}PI-O d%NO_=I. public FileAccessI(String sName,long nPos) throws IOException 4a00-y=' { 4!,x3H' oSavedFile = new RandomAccessFile(sName,"rw"); _dVzvk`_R this.nPos = nPos; _5EM <Ux oSavedFile.seek(nPos); -("sp } cU?A|' ComVY4, fI;6!M#
public synchronized int write(byte[] b,int nStart,int nLen) Zsc710_ { *=mtt^yZ int n = -1; b=horvs/! try{ m!SxX&m"G oSavedFile.write(b,nStart,nLen); f/&gR5 n = nLen; "C&l7K;bp } ,<0R'R catch(IOException e) wO/}4>\ { w2_$>z e.printStackTrace (); n|sP0,$N1 } ET;YAa* u6Fm
qK]Dj ozwPtF5 return n; CtJ*:wF } rrbD0UzFA P~`gWGC} {z>fe
} } ?XN=Er^ `ECT8 _b|mSo,{Y /* 4v9jGwnz t **SiteInfoBean.java kKL'rT6z */ X)^eaw]Q0 package NetFox; o~<Xc Q46^i7= pW$ZcnU public class SiteInfoBean { 9oBK(Sf@^ UgI0
*PE2 `Cq&;-u private String sSiteURL; //Site's URL +9Q,[)e r private String sFilePath; //Saved File's Path V&)Jvx}^ private String sFileName; //Saved File's Name :0N}K} private int nSplitter; //Count of Splited Downloading File " E+V>V+ Sv3O${B| @9#l3 public SiteInfoBean() z7TMg^9# {//nSplitter的缺省值为5 kq|(t{@Rp //default value of nSplitter is 5 DS;,@$N_N this("","","",5); JC6?*R } Nl/^ga wT\JA4 x6yYx_ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) En!X}Owh { E$O-\)wY0 sSiteURL= sURL; #<h//< sFilePath = sPath; >u?m
Bx sFileName = sName; 5<64 C}fE3 this.nSplitter = nSpiltter; xf2|9Tqt NJ]AxFG vq?Le j } ri.}G -sjyv/%_ ZZ'5BfI"I% public String getSSiteURL() |k.%e4 { kg&R return sSiteURL; T'6MAxEZUq } 6LRvl6ik p~Wy`g- 8MQb5( ! public void setSSiteURL(String value) ~fnu;'fN { (>.lkR sSiteURL = value; <n1panS } &&PXWR!%] X!xmto 33},lNS| public String getSFilePath() 8
$qj&2 N { ldFR%v>9 return sFilePath; !jWE^@P/B } AZ.$g?3w 'fjouO xm Ns% public void setSFilePath(String value) q0C%">>1# { zq(4@S-TU sFilePath = value; FUVp}>#U } X$2f)3 :%-w/QwTR H)k V8wU public String getSFileName() .H@b zm { (kTu6t* return sFileName; 5) q_Aro } $\+x7"pI ,njlKkFw^Z NkV81? public void setSFileName(String value) W3zYE3DZf { ZEK,Z[' sFileName = value; UgLFU# } I&U.5wf 1xEFMHjy lc8g$Xw3 public int getNSplitter() '%X29B5 { +
\]-" return nSplitter; uBK0+FLL@ } 7gcR/HNeF +MZI \> uPq@6,+ public void setNSplitter(int nCount) Lf)JO|o { jddhX]>I nSplitter = nCount; w4fQ~rcUIc } DRpFEWsm } *c\XQy dF[|9%) %JHv2[r^P /* '?jsH+j+ **Utility.java Z3yy(D>* */ t`="2$NO package NetFox; l$Vy\CfK3n &09&;KJ !Rc
% public class Utility { 5E]iv^q% b}DC|?~M }hsNsQ public Utility() E~#G_opQA { soLW'8 Y0Tad?iC lu00@~rx/ } +HPcvu?1 q 'd] //线程睡眠 }K={HW1> public static void sleep(int nSecond) oNIYO*[ { PZQAlO, try{ z{|0W!nHJ Thread.sleep(nSecond); UWnF2,<s; } \gA<yz-;N catch(Exception e) D+v?zQw { m 94PFD@N e.printStackTrace (); f=k#o2 } IA<>+NS } yuy\T(7BN %L^( eTi[ //日志 <$yA* public static void log(String sMsg) >SLQW { 5q*s_acQ System.err.println(sMsg); :A
zll s }
+WAkBE/ D{s87h rH!sImz, public static void log(int sMsg) >t.Lc. { z
&Xl System.err.println(sMsg); G"`
}"T0} } (BPO*' } CV\^gTPmx "o+?vx- 41Z@_J|& /* C{}PO u **TestMethod.java <#ON */ ^7wqb'xg package NetFox; !p/SX>NJ )M.s<Y {Y@shf; public class TestMethod { Et!J*{s l>K+4 &muBSQ- public TestMethod() /M%>M] { ///xx/weblogic60b2_win.exe \894Jqh try{ h\UKm|BZ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); F$)l8} //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ,eBC]4)B6 SiteFileFetch fileFetch = new SiteFileFetch(bean); CdF;0A9.3 fileFetch.start(); O\.^H/ } l<w7
\a6 catch(Exception e){e.printStackTrace ();} udqrHR5 Q3tyK{JE D#L(ZlD4 } /Ne#{*z)hO {/]2~!
I8? public static void main(String[] args) ySr,HXz { B^/MwD>% new TestMethod(); wHbkF#[:i } 4`Ud\Jm[s } 3A!a7]fW 点击下载更多相关资料
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