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/* IAt;?4 **SiteFileFetch.java 8?S32Gdu */ ..qAE.%% package NetFox; } d /5_X import java.io.*; rs01@ import java.net.*; ,63hO.4M t&UPU&tY /#Y)nyE
public class SiteFileFetch extends Thread { M.K-)r, 73/kyu-0% s)$N&0\ SiteInfoBean siteInfoBean = null; //文件信息Bean -Iz&/u*}f long[] nStartPos; //开始位置 EAQg4N:D7L long[] nEndPos; //结束位置 nG;wQvc FileSplitterFetch[] fileSplitterFetch; //子线程对象 LOyL:~$ long nFileLength; //文件长度 xq:.|{HUk boolean bFirst = true; //是否第一次取文件 <dx
xXzLT boolean bStop = false; //停止标志 _//)|.6c3 File tmpFile; //文件下载的临时信息 bWv4'Y!p DataOutputStream output; //输出到文件的输出流 -If-c'"G `fEB,0j^ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) &x{CC@g/ public SiteFileFetch(SiteInfoBean bean) throws IOException nu,#y"WQ { qO=_i d siteInfoBean = bean; #5GIO //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); -bHQy: tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); YmM+x=G: if(tmpFile.exists ()) VOBzB] { u7>b}+ak& bFirst = false; C Ih@H6| read_nPos(); D%v4B`4ua' } !dB {E else :8}QKp { *Dld?Q nStartPos = new long[bean.getNSplitter()]; ` bd nEndPos = new long[bean.getNSplitter()]; <8MKjf } `r+"2.z* 27*u^N*z@ jw$3cwddH 4C^;lK } P"0S94o:5J O=}4?Xv '~i}2e. public void run() wZVY h { P0J3ci}^ //获得文件长度 HlqvXt\ //分割文件 <va3L y)c& //实例FileSplitterFetch 9I8{2] //启动FileSplitterFetch线程 >N>WOLbb7( //等待子线程返回 \P]w^ try{ hoI?,[@F if(bFirst) F)/}Q[o8 { JqTkNKi/s nFileLength = getFileSize(); &P&LjHFK if(nFileLength == -1) V6"<lK8" {
#|fa/kb~ System.err.println("File Length is not known!"); vCT5do"C& } y0qrl4S)v else if(nFileLength == -2) 9Vz1*4Ln { h)BRSs?v_D System.err.println("File is not access!"); Q[^IX } zCKZv|j6 else {J q[N} { T;jp2 # for(int i=0;i<nStartPos.length;i++) kM5N#|! { \o9-[V#Gm nStartPos = (long)(i*(nFileLength/nStartPos.length)); hK"hMyH^ } Ei2Y)_ for(int i=0;i<nEndPos.length-1;i++) 78>)<$+d { an^"_#8DA@ nEndPos = nStartPos[i+1]; `m?%{ \ } U>6MT@\ nEndPos[nEndPos.length-1] = nFileLength; {4Y@DQ- } `O(ec } 8;;!2>N uZ( I|N$ L+Yn}"gIs //启动子线程 ]kq{9b'; fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; a'f"Zdh%w for(int i=0;i<nStartPos.length;i++) . $uvQpyh { o^;$-O!/ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 6H67$?jMyJ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), <jF]SN nStartPos,nEndPos,i); cc7*O Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^D\1F$AjC fileSplitterFetch.start(); xc[@lr } YLVV9( // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9tsI1]1[m siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 4k_&Q?1 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", zQ9"i nEndPos = " + nFileLength); $j:$
` // fileSplitterFetch[nPos.length-1].start(); $u_0"sUV !Uz{dFJf; 3}=r.\]U //等待子线程结束 :S}!i?n //int count = 0; 0F-X.Dq //是否结束while循环 1C\OL!@L boolean breakWhile = false; D_
xPa !TY9\8JzV |t*(]U2O0 while(!bStop) t
m?[0@<s { n"8vlNeW write_nPos(); IY6DZP Utility.sleep(500); 24PEt%2 breakWhile = true; ,80qwN, /e :V44 >f #P( for(int i=0;i<nStartPos.length;i++) D].!u{## { T:q_1W?h] if(!fileSplitterFetch.bDownOver) ~4h<nc { 6s\niro2 breakWhile = false; S[!K break; \$YKw0K } :b)IDcW&j: } =gS?atbX if(breakWhile) J#vIzQ break; '_,/N!-V `Bk7W]{L R>SS\YC'X //count++; t!RR5! //if(count>4) >c%OnA,3 // siteStop(); W[BZ/ } )=l~XV "a))TV%N 6nh!g System.err.println("文件下载结束!"); |niYN7 17 } B*7Y5_N catch(Exception e){e.printStackTrace ();} xgHR;USH } "MHm9D?5 Y$hYW &v|Uy}h&%1 //获得文件长度 =!T@'P? public long getFileSize() !E!i`yF { DhY.5 int nFileLength = -1; .?R~!K{` try{ iSu7K&X9q URL url = new URL(siteInfoBean.getSSiteURL()); w>Iw&US
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); W1'F)5(?7 httpConnection.setRequestProperty("User-Agent","NetFox"); uKc x$ [P.M>"c\ VZo[\sWf int responseCode=httpConnection.getResponseCode(); ,Oa-AF/p if(responseCode>=400) stuj,8 { >QO^h<.> processErrorCode(responseCode); )3# gpM return -2; //-2 represent access is error +\g/KbV7 } X{4jyi-< /a.4atb0 ?q a String sHeader; 't:$Lx K
;\~otR^ 2Ya)I k{ for(int i=1;;i++) MuXp*s3[ { O O?e8OU //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); FsQeyh> //Utility.log(in.readLine()); {y)O?9q sHeader=httpConnection.getHeaderFieldKey(i); MCOiB<L6 if(sHeader!=null) Z`x|\jI { Cbu/7z if(sHeader.equals("Content-Length")) !>QS746S@ { fB^h2 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); xIu# break; Py*( % } M)S(:Il6Xx } /(IV+ else X[/>{rK break; ]v^/c~"${ } fy+fJ )4sj } mdjPKrF< catch(IOException e){e.printStackTrace ();} &*2\1;1tB catch(Exception e){e.printStackTrace ();} biAI*t AsFn%8_I _CqVH5U? Utility.log(nFileLength); _8t5rF @>`+eg][?P <vMna< /d return nFileLength; |vW(;j6 } rEz-\jLD~ +8qtFog$\g o6`4y^Q{/ //保存下载信息(文件指针位置) c%1k'Q private void write_nPos() @}[ >*Xy% { Mx9#YJ?t~ try{ DV+M;rs output = new DataOutputStream(new FileOutputStream(tmpFile)); 9R_2>BDn output.writeInt(nStartPos.length); 9/A$3#wF for(int i=0;i<nStartPos.length;i++) 5=/&[= { /`(Kbwh // output.writeLong(nPos); 0XouHU output.writeLong(fileSplitterFetch.nStartPos); UNLmnj;-Q output.writeLong(fileSplitterFetch.nEndPos); X3[gi` } W\]bh'( output.close(); ;R[ xo! } 1 &G0; catch(IOException e){e.printStackTrace ();} vByt_X catch(Exception e){e.printStackTrace ();} =&+]>g{T } 337y,; eC%uu C]S~DK1 //读取保存的下载信息(文件指针位置) B
~u9"SR. private void read_nPos() $t*>A+J { |-Rg]. try{ =$ bJ`GpJ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); fP 1V1ao int nCount = input.readInt(); vTnrSNdSE nStartPos = new long[nCount]; Pdgn9 nEndPos = new long[nCount]; 3a9%djGq for(int i=0;i<nStartPos.length;i++) 5)712b(& { rP4v_?Zg+ nStartPos = input.readLong(); vW6
a=j8 nEndPos = input.readLong(); 5cc;8i }
lMkDLobos input.close(); .CJQ]ECl7p } Xae0xs catch(IOException e){e.printStackTrace ();} d)@Hx8 catch(Exception e){e.printStackTrace ();} 'ec G:B`S } (!b_o A8V UI:YzR w+A:]SU private void processErrorCode(int nErrorCode) Skb,cKU { 5L ]TV\\ System.err.println("Error Code : " + nErrorCode); 8CXZ7 p }
>?Y)evW 05sWN 0 Z_b^K^4 //停止文件下载 1XfH,6\8i public void siteStop() {u !Q=D$3 { Yz<,`w5/6~ bStop = true; V+\L@mz; for(int i=0;i<nStartPos.length;i++) F;
upb5 fileSplitterFetch.splitterStop(); zzlqj){F
jbQ N<`! XKp$v']u } E lf'1 } +IS+!K0?) //负责部分文件的抓取 TtZZjeg+V **FileSplitterFetch.java TcB^Sctf */ P9d%80(b4 package NetFox; mM`zA%= n oWjZ }E
o\=>l7 import java.io.*; |E{tS,{OhJ import java.net.*; ]JGh[B1gh D.7,xgH K)-Gv|*t public class FileSplitterFetch extends Thread { kXjrc ,E7+Z' ; VSm[80iR0 String sURL; //File URL 01N]|F: long nStartPos; //File Snippet Start Position $? 'JePC long nEndPos; //File Snippet End Position v %?y5w int nThreadID; //Thread's ID ,/m@<NyK boolean bDownOver = false; //Downing is over "h@|XI boolean bStop = false; //Stop identical g>k"R4 FileAccessI fileAccessI = null; //File Access interface `2WtA_ VV_Zrje ?(C(9vO public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException U,G!u =+ { Drn{ucIs this.sURL = sURL; Kmk}Yz this.nStartPos = nStart; kzky{0yKk= this.nEndPos = nEnd; Fe: M'. nThreadID = id; 2X];zY fileAccessI = new FileAccessI(sName,nStartPos);//定位 2/*F}w/ } |6qxRWT" I
JPpF` o0yyP,?yh public void run() sObH#/l` { 7z.(pg= while(nStartPos < nEndPos && !bStop) KOQiX?' { Z.Otci> J R1!F mZW8 C]X:@^Hy try{ ^A&i$RRO URL url = new URL(sURL); jwP}{mi* HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;q=0NtCS=4 httpConnection.setRequestProperty("User-Agent","NetFox"); q+j.)e String sProperty = "bytes="+nStartPos+"-"; g]fds Zv httpConnection.setRequestProperty("RANGE",sProperty); "ITC P<+ Utility.log(sProperty); AD$$S.zoD< `5HFRgL`. 0n FEPMO InputStream input = httpConnection.getInputStream(); ^Vbx9UN/ //logResponseHead(httpConnection); !b !C+ \v qcNu9Ih xgdS]Sz byte[] b = new byte[1024]; i146@<\G{P int nRead; PpxLMe] while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) qVHXZdGL { )+Nm@+B nStartPos += fileAccessI.write(b,0,nRead); }Q }&3m~g //if(nThreadID == 1) 0XkLWl|k // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); S]Y3nI } asT/hsSNS {2A| F{7> zRO-oOJ Utility.log("Thread " + nThreadID + " is over!"); \(4"kY_= bDownOver = true; Dw%V.J/&o //nPos = fileAccessI.write (b,0,nRead); ] "ZL<?3g } .o27uB. catch(Exception e){e.printStackTrace ();} '}nH\?( } |"K< } *Ce8(
"v, gY\g+df- yN'<iTh //打印回应的头信息 `[OJ)tHE public void logResponseHead(HttpURLConnection con) ZWtlO P#] { /w!!jj^ for(int i=1;;i++) 8fG$><@ { bqo+b{i\ String header=con.getHeaderFieldKey(i); %=ZN2)7{ if(header!=null) b]-~{' + //responseHeaders.put(header,httpConnection.getHeaderField(header)); F!>92H~3G Utility.log(header+" : "+con.getHeaderField(header)); gI~4A, else AQUl:0! break; \n&l } wgN)*dpuI } P#8+GN+bF BzVF!<! 4R c_C0O public void splitterStop() 3?}\Hw { ;^[VqFpeS bStop = true; UQ7E7yY# } FnZMW, P %OV)O - &Zzd6[G+ } +vDEDOS1 +#B4Z'nT 1X ?9Ji)h /* Qb N7sg~~ **FileAccess.java slQxz;t *//文件访问(定位,写) cC4 2b2+
package NetFox; GlVb |O" import java.io.*; \!*3bR n?UFFi+a mY)Y47iL public class FileAccessI implements Serializable{ bu2@~ Q5ZZ4`K! //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 I[x+7Y0k9 RandomAccessFile oSavedFile; %2S+G?$M? long nPos; }L!%^siG_ Y%OJ3B(n| k@[P\(a3b public FileAccessI() throws IOException %(P\"hE' { +zl2|' this("",0); MrW*6jY@ } <FkoWN @nh*H{ O BCH%\;g public FileAccessI(String sName,long nPos) throws IOException <P%<EgOE { FX->_}kL= oSavedFile = new RandomAccessFile(sName,"rw"); 2!w5eWl, this.nPos = nPos; i"B q*b@ oSavedFile.seek(nPos); 9s.x%m, } Mnv2tnU] w !5@PJ)~U |}?o=bO public synchronized int write(byte[] b,int nStart,int nLen) CnXl 7" { ,/bSa/x` int n = -1; bG|aQ2HW try{ odPdWV,&* oSavedFile.write(b,nStart,nLen); &'mq).I2 n = nLen; eG@0: } Ala~4_" WL catch(IOException e) +,g"8&> { K1_]ne)
e.printStackTrace (); mDCz=pk) } YKWiZ +A!E 6+' c; MF return n; Li? _P5+a } &*e( ycPGv.6 [9lfR5=Xw[ } TwaK>t96[ ZaZm$.s n `Z'h[-2` /* }|Ao@UvH **SiteInfoBean.java 4t]YHLBS */ _Yms]QEZ package NetFox; }+m")=1{ Sc?UjEs O:I"<w 9_1 public class SiteInfoBean { 3jh:
K ;1^([>| +HpPVuV private String sSiteURL; //Site's URL S>6f0\F/Y% private String sFilePath; //Saved File's Path rsGQ
:c private String sFileName; //Saved File's Name c1wP/?|.> private int nSplitter; //Count of Splited Downloading File FG6bKvEQm^ wuV*!oef o MB"TwtW public SiteInfoBean() y$Y*%D^w {//nSplitter的缺省值为5 ov9+6'zya //default value of nSplitter is 5 VJf|r#2 this("","","",5); 'f
"KV| } !EuqJjh 8NUVHcB6 d41DcgG'j( public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) f~rq)2V: {
W>HGB sSiteURL= sURL; 2C&G'@> sFilePath = sPath; AWG;G+ sFileName = sName; O'i!}$=g this.nSplitter = nSpiltter; O^L#(8bC w y\0o J?1U'/Wx2 } "J_#6q* [#3*R_#8R Rt6(y #dF public String getSSiteURL() \I[f@D-J { Osk'zFiL< return sSiteURL; WxrGoo^ } `Vf k.OP gx55.} xl]1{$1M public void setSSiteURL(String value)
!VzbNJ&' { +{5y,0R sSiteURL = value; Pc:5*H } 26D,(Y$* z5_#]:o& )[]*Y]vSx public String getSFilePath() -"9&YkN { :MF F*1 return sFilePath; vTk\6o q } 2x<A7l)6 937 z*mh Ht,dMt>: public void setSFilePath(String value) 7%0V ?+]P { |l#<vw
wE sFilePath = value; \$B%TY } yd>b2 M f7y3BWOi] "rJJ~[Y public String getSFileName() x&4gy%b { O'L9 s>B return sFileName; $[*QsU%% } hUo}n>Aa >69- [#P! 6 *GR_sMm public void setSFileName(String value) Ks>l=5~v| { }NgevsV>; sFileName = value; kHhxR;ymA7 } {)5tov1 n]Z() "D |vUjoa'.7E public int getNSplitter() v&]k8Hc- { ~5@bWJ return nSplitter; wa f)S= } ":meys6t# mFa%d8Y \kS:u}Ip! public void setNSplitter(int nCount) oz[Mt
i* { H-g
CY|W nSplitter = nCount; +WTO_J7 } qH9bo-6 } M. o}? qZwqnH t"Tv(W?_ /* t8:QK9|1 **Utility.java m~;}8ObQE */ '&+5L. package NetFox; "WfVZBWG$ 5%#V>|@e# nPRv.h public class Utility { f[s|<U^ gbvMS*KQz rFLm!J] public Utility() wnr<# =,I' { DN 0`vl{* \|f3\4;! ,l )7]p*X } CEXD0+\q [zsUboCkc //线程睡眠 =g3o@WD/G public static void sleep(int nSecond) Z.$)# vM5 { BufXnMh. try{ kwAL]kI Thread.sleep(nSecond); QMQ\y8E } r
Y#^C catch(Exception e) 0n)99Osq(u { vjz 'y[D e.printStackTrace (); - xE%`X } 7mBH#Q) } g=)OcTd# ZT
d)4f //日志 b uOpHQn public static void log(String sMsg) bZ-_Q { gCjW !t System.err.println(sMsg); /<e<-C*d&< } (Z |Nz *< : pkOZ+t
z?M_Cz;:J public static void log(int sMsg) sogdM{tz\ { *P;
cSx?2 System.err.println(sMsg); Vm]xV_FOd } R|g50Q } |EZ\+!8N:{ J-U5_>S (ptk!u6 /* &peUC n **TestMethod.java !3;KC"o */ jM5w<T-2/ package NetFox;
<
pWk
+zL|j/q ? duq(K9S public class TestMethod { s%/x3anz= L}Rsg'U H-C$Jy)f" public TestMethod() x"83[0ib { ///xx/weblogic60b2_win.exe
HE{JiAf try{ A3s-C+@X SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); h#~\-j9> //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Qk[YF SiteFileFetch fileFetch = new SiteFileFetch(bean); 5i1E
5@~ fileFetch.start(); Hpj7EaMZ_ } A?+cdbxJw catch(Exception e){e.printStackTrace ();} w^Atd|~gi ESyb34T` bB+ 4 } TJ_pMU FnWN]9 wi-F@})f# public static void main(String[] args) E5QQI9ea { ZGsI\3S new TestMethod(); y"T(Unvc } KJYcP72P } HaA2y 点击下载更多相关资料
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