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/* C u?$!|V **SiteFileFetch.java [2FXs52 */ )Tb;N package NetFox; pD>3c9J'^F import java.io.*; J`x9XWYw import java.net.*; %2L9kw' }BfwMq4E)n K^>qn,]H' public class SiteFileFetch extends Thread { ,%jJ
,G, IcIMa 3(}?f SiteInfoBean siteInfoBean = null; //文件信息Bean A5/h*`Q\\ long[] nStartPos; //开始位置 '{+hti,Lh long[] nEndPos; //结束位置 _rR.Y3N FileSplitterFetch[] fileSplitterFetch; //子线程对象 *Z0}0<
D@Z long nFileLength; //文件长度 @+2Zt% boolean bFirst = true; //是否第一次取文件 V2y[IeSQ boolean bStop = false; //停止标志 N&ddO-r[s File tmpFile; //文件下载的临时信息 s e1ipn_A DataOutputStream output; //输出到文件的输出流 _E"[% WkO . //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) I3L1|! public SiteFileFetch(SiteInfoBean bean) throws IOException Q3KBG8 { stDn{x. siteInfoBean = bean; s=d?}.E$ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); j=gbUXv/ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); },"g* if(tmpFile.exists ()) mb/3
#) { xz%ig^L bFirst = false; y>#j4%D~4 read_nPos(); y~d W=zO } r'!l`
gm,S else ECSC,oJ { K:Ap|F nStartPos = new long[bean.getNSplitter()]; S2NsqHJr nEndPos = new long[bean.getNSplitter()]; bHMlh^{`% } 49#-\=<gt iKK=A.g 3a5H<3w_ dqkkA/1 } |/s.PNP2 8jZYy! $wN .~"T public void run() O]Hg4">f { Iq5F^rH`[ //获得文件长度 U-k;kmaj //分割文件 UkYQ<MNO //实例FileSplitterFetch i3~!ofTb //启动FileSplitterFetch线程 F+6ZD5/ //等待子线程返回 p!691LI try{ Ky'^AN] if(bFirst) u)V*o { L"Gi~:z nFileLength = getFileSize(); *[U:'o`67 if(nFileLength == -1) P o_9M4kU { 4H,DG`[Mo System.err.println("File Length is not known!"); f"tO*/|` } PU>;4l else if(nFileLength == -2) T-@pTJ !K9 { ;klDt|%3j System.err.println("File is not access!"); .d fTv/n } 3}+/\:q* else &l.^UQ { @<2pYIi8 for(int i=0;i<nStartPos.length;i++) *p-Fn$7\n { 7q?YdAUz nStartPos = (long)(i*(nFileLength/nStartPos.length)); <
d]|5 } kal8k-$# for(int i=0;i<nEndPos.length-1;i++) !Q#b4 f { l:ED_env: nEndPos = nStartPos[i+1]; CxRp$;rk } WLpn,8qsY nEndPos[nEndPos.length-1] = nFileLength; wiVQMgi` } ?1{`~)" } d.+vjMI Y[H_?f=;% j\vK`.z //启动子线程 kgI Wgk% fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; <,GHy/u\ for(int i=0;i<nStartPos.length;i++) 1t0FJ@)* { EK'&S=] fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `~RV siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), D6vn3*,& nStartPos,nEndPos,i); 7^; OjO@8 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); d#*5U9\z fileSplitterFetch.start(); Z^|C~lp;n } ArEpH"}@ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `8-aHPF- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); !G,$:t1-=V // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ^Pf&C0xXv nEndPos = " + nFileLength); Fv: %"P^ // fileSplitterFetch[nPos.length-1].start(); 4"2/"D0 c,qCZ-.Sg )k1,oUx //等待子线程结束 U&5zs r //int count = 0; SQ!lgm1bA //是否结束while循环 ]UI+6}r boolean breakWhile = false; t[maUy_A CvW((<? +wSm6*j7= while(!bStop) LJ)) { e.+)0)A- write_nPos();
'2tEKVb Utility.sleep(500); cg.e(@( breakWhile = true; vraU&ze\1 q+z\Y? F:g{rm[ for(int i=0;i<nStartPos.length;i++) 3azc `[hl { )eEvyU
if(!fileSplitterFetch.bDownOver) ob7_dWAG { 'k67$H breakWhile = false; s,v#lJ]d0W break; EVL;" } /$z@_U[L } v (h Xk]S if(breakWhile) OgS8.wX break; of`]LU: *\WI!% `Y;gMrp //count++; }^ <zVdwp //if(count>4) FNM"!z // siteStop(); :U q]~e } _e_%U<\4 t4*A+"~j %MJ7u} System.err.println("文件下载结束!"); 0q>lW &J } ;5k|gW catch(Exception e){e.printStackTrace ();} C6M/$_l&a } `.W;ptZ6 [8P2V xW9
s[X //获得文件长度 Z
~9N public long getFileSize() PoJyWC { weV#%6=5\ int nFileLength = -1; pCUOeQL(
try{ 2S6EDXc URL url = new URL(siteInfoBean.getSSiteURL()); \,!q[nC HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); fti|3c httpConnection.setRequestProperty("User-Agent","NetFox"); 1^#Q/J, Bqi2n'^O2 *`-29eR"8 int responseCode=httpConnection.getResponseCode(); .^S78hr]n if(responseCode>=400) {Yk20Zn { mv?H]i`N processErrorCode(responseCode); ~k0)+D} return -2; //-2 represent access is error *F*fH>?C# } S1`0d9ds# E`n`#=xKR PJ@ ,01 String sHeader; *UoHzaIqz "T%'Rp`j| xg^^ @o for(int i=1;;i++) @%nUfG7TQ { X9A[
//DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); |a$w;s>\ //Utility.log(in.readLine()); ]~Vu-@
/} sHeader=httpConnection.getHeaderFieldKey(i); #ljg2:I+ if(sHeader!=null) pf@}4PN} { *.c9$`s if(sHeader.equals("Content-Length")) )x x/di { 50aWFJYw nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Ti|++oC/& break; T\!SA } T;r];Y(b* } (OcNC/9 else )v{41sM+ break; -xu.=n@, } by]|O } <1+6O[>{ catch(IOException e){e.printStackTrace ();} ~:<@ ` catch(Exception e){e.printStackTrace ();} !b->u_ 7 eQoc2X2 j4xr1y3^ Utility.log(nFileLength); ^s~n[ 6q[!X0u ,."(Gp return nFileLength; h_chZB' } E
D^rWE_ 62l0
Z- |id79qY7g //保存下载信息(文件指针位置) XQJ^)d00h private void write_nPos() s!/holu { XH:gQ 9FD try{ fk7Cf"[w output = new DataOutputStream(new FileOutputStream(tmpFile)); NZC='3Uz output.writeInt(nStartPos.length); B/D\gjb for(int i=0;i<nStartPos.length;i++) ,V]A63J { n~ >h4=h // output.writeLong(nPos); +F~0\#d output.writeLong(fileSplitterFetch.nStartPos); iQzX-a|4] output.writeLong(fileSplitterFetch.nEndPos); T[XP\!z]B! } :n4:@L<%H output.close(); +>:}req } 27],O@2?L catch(IOException e){e.printStackTrace ();} /1W7<']>xV catch(Exception e){e.printStackTrace ();} n*i'v tQ8 } ow+Dd[i EdAR<VfleA A]iv)C;] //读取保存的下载信息(文件指针位置) k g,ys4 private void read_nPos() hHc^ZA { RQpIBsj try{ 2WPF{y%/ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); i$JG^6,O int nCount = input.readInt(); ]fADaw-R nStartPos = new long[nCount]; .5!sOOs$P nEndPos = new long[nCount]; %- ZR~* for(int i=0;i<nStartPos.length;i++) mbX)'. +L { E/7vIg
F nStartPos = input.readLong(); s1Tl.p5 nEndPos = input.readLong(); , |.*, } ~njbLUB input.close(); qHR^0& } Cl9SPz catch(IOException e){e.printStackTrace ();} F!)M<8jL&9 catch(Exception e){e.printStackTrace ();} 14rVb2^ } .:Bwa zyZok*s "37@Zt private void processErrorCode(int nErrorCode) nGv23R(?G { 2z.8rNwT System.err.println("Error Code : " + nErrorCode); " _:iK] } +%
XhQ Sj0 ucnuHi XewXTd#x //停止文件下载 s("Cn/ZkS public void siteStop() ;5D@kS^ { i.&Kpw9;m bStop = true; XSp x''l for(int i=0;i<nStartPos.length;i++) jom}_ fileSplitterFetch.splitterStop(); GSGyF I mPu} UAx.Qq } %oh`EGmVP } UH 47e //负责部分文件的抓取 /o|PA:6J **FileSplitterFetch.java \ W
'i0+ */ CGd[3}" package NetFox; GJC!0{8; *(d6Z# s%N` import java.io.*; Mhv1K|4s import java.net.*; }fJ:wku rnn2u+OG {d 1N& public class FileSplitterFetch extends Thread { QiTR-M2C! abROFI5.L $u; >hk String sURL; //File URL R3B5-^s long nStartPos; //File Snippet Start Position `26V`%bPkr long nEndPos; //File Snippet End Position 0'yG1qG int nThreadID; //Thread's ID smfG,TI boolean bDownOver = false; //Downing is over ?w]"~ boolean bStop = false; //Stop identical c~gNH%1XN FileAccessI fileAccessI = null; //File Access interface 'v\1:zi 5JBB+g >JKnGeF public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ]aC':55( { %[]"QbF? this.sURL = sURL; L$Hx?^3 this.nStartPos = nStart; z(g%ue\ this.nEndPos = nEnd; a=J@yK nThreadID = id; iK5]y+@8 fileAccessI = new FileAccessI(sName,nStartPos);//定位 +{,N X } Vs_\ykO r6d0x MzEm*`< public void run() H GO#e { I~\O while(nStartPos < nEndPos && !bStop) /d0Q>v.g { T}n N=Q4 ^>N8*=y Q`.'-iq try{ jo9J%vo URL url = new URL(sURL); `z9)YH HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 2d-TU_JqX httpConnection.setRequestProperty("User-Agent","NetFox"); VHXI@UT* String sProperty = "bytes="+nStartPos+"-"; "gXxRHTX httpConnection.setRequestProperty("RANGE",sProperty); /=8O&1=D Utility.log(sProperty); >I$B= dT5J-70Fl &`9j)3^J. InputStream input = httpConnection.getInputStream(); e>L5.~i //logResponseHead(httpConnection); A",eS6 ]b4pI*:$I
xS=_yO9- byte[] b = new byte[1024]; <8u>_o6 int nRead; 0JmFQ^g( while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) R%>jJ[4\[ { ,>D ja59 nStartPos += fileAccessI.write(b,0,nRead); 8[8|*8xqs //if(nThreadID == 1) @%6)^]m}r // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); cC^W2\ } 9@:BK;Fi v6wRME;JA JB&G~7Q85 Utility.log("Thread " + nThreadID + " is over!"); y,MPGW_ bDownOver = true; Z5((1J9 //nPos = fileAccessI.write (b,0,nRead); jCU=+b= } \Dn&"YG7 catch(Exception e){e.printStackTrace ();} z%OuI 8"' } R=!kbBK>\ } &MCy.(jN L +L9Y} ;tJWOm //打印回应的头信息 T"n{WmVQ public void logResponseHead(HttpURLConnection con) -glugVq { JZ `>|<W for(int i=1;;i++) 8O,?|c=> { "hL9f=w String header=con.getHeaderFieldKey(i); {DU"]c/S if(header!=null) ^#]c0 //responseHeaders.put(header,httpConnection.getHeaderField(header)); ?nQ_w0j Utility.log(header+" : "+con.getHeaderField(header)); _b>F#nD,'% else *i@sUM?K
break; ,Z^Ca15z } 2zz,(RA }
j:7*3@f :.Y|I[\E% dVa!.q_3 public void splitterStop() DhZ:#mM{ { \Ke8W,)ew bStop = true; ?N:B } rvW!7-R +}P%HH]E/p <"<Mbbp } 85'nXYN{d Y=r!2u6r~ djWcbC=g_ /* )D;*DUtMVm **FileAccess.java ~e{H#*f&1/ *//文件访问(定位,写) =/[ltUKs:a package NetFox; JjQ8|En import java.io.*; T'E]
i!$ n|WfaJQZ UEzsDJu public class FileAccessI implements Serializable{ C;9t">prk ny)]GvxI //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 WE0}$P: RandomAccessFile oSavedFile; t#Th9G]1 long nPos; 98GlhogWt %;7.9% k}GjD2m public FileAccessI() throws IOException Y,C=@t@_ { Q
$]YD
pCM this("",0); /#f^n]v } {3LA%xO _pW_G1U %`e`g ^ public FileAccessI(String sName,long nPos) throws IOException Mi]I:ka { (?vK_{ oSavedFile = new RandomAccessFile(sName,"rw"); 8!&nKy<Y this.nPos = nPos; $xT1 1 ^ oSavedFile.seek(nPos); D|l,08n"? } [& ^RP,N~ /be=u@KV n#4Gv|{XMD public synchronized int write(byte[] b,int nStart,int nLen) I.1D*!tz { w]nX?S8 int n = -1; Z&Ue|Z4Qt try{ +c--&tBo oSavedFile.write(b,nStart,nLen); iwU[6A n = nLen; =Q-k'= 6\ } );Z]SGd catch(IOException e) 2:Q(Gl`<l { ;\qXbL7 e.printStackTrace (); P>(P2~$Y" } *:g_'K"+ VevNG* Fi4UaJ3K return n; rFey4zzz } A?8\Y{FQ *t(4 $ wO7t!35 } 4 /'N|c. :'}@Al9=> 'Dath>Y= /* }$&xTW_ **SiteInfoBean.java 6V1:qp/6 */ G(/DtY] package NetFox; %?9Ok z\T Lsx ^z~~VBv public class SiteInfoBean { +6l]] *H H=p`T+ /1d<P! H private String sSiteURL; //Site's URL "UG
K8x private String sFilePath; //Saved File's Path &J$##B private String sFileName; //Saved File's Name (u&`Ij9 private int nSplitter; //Count of Splited Downloading File e4\dpvL W\8Ln> Z(e^ iH public SiteInfoBean() +BL{@,zr {//nSplitter的缺省值为5 $ J1f.YE //default value of nSplitter is 5 -:<lkq&/ this("","","",5); [|RjHGf } )K;]y-Us[ kccWoU, #H~_K}Ks public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) l+'F_a { xq[Yg15d% sSiteURL= sURL; fPqr6OYz sFilePath = sPath; wvN `R sFileName = sName; <{Q'&T this.nSplitter = nSpiltter; W2]TRO @0NJ{
|yKud } &;c>O 1/;o vWjnI*6T# public String getSSiteURL() X%}nFgqQ { QR0(,e$Dl return sSiteURL; h/)_)
r.x } |^a;77nE_^ _mJG5(| o6a0'vU>< public void setSSiteURL(String value) W\cjdd { }^%xvmQ\] sSiteURL = value; taWqSq! } I:l01W; 5l{Ts04k% Kct@87z public String getSFilePath() !wE}(0BTx { KpHw-6" return sFilePath; BPv>$
m+. } cn`iX(ZgR !%)]56( `@Oa lg public void setSFilePath(String value) HrM$NRhu { Vzg=@A# sFilePath = value; N|usFqCNk^ } N( Oyi #7G*GbKY J G$Z.s public String getSFileName() =9wy/c$ { r^fe4b return sFileName; %, P>%'0 } *ZrSiIPP !t#F/C xHA0gZf public void setSFileName(String value) Fc 6iQ { 'b&yrBFD sFileName = value; zM#sOg } H t(n%;< j5$GFi\kB o\VUD public int getNSplitter() (s<s@` { ;C.S3} return nSplitter; i^msjA } ac{?+]8} ?)D^~/
A b KtD"JG\ public void setNSplitter(int nCount) S\i@s_ { TrS8h^C nSplitter = nCount; LeOP;#
} zp}eLm:=d } }H> ^o9 >l']H*&B< 4T6 {Y /* IxZb$h[ **Utility.java V)ig)(CT */ Yf@e=: package NetFox; L{-LX=G^ u\yVR$pQ 2,q}Nq public class Utility { \3f&7wU ]`g@UtD9` &ANP`= public Utility() )kXhtjOl| { dt@P>rel 2Os1C}m q? qC } H,unpZ( I#F!N6; //线程睡眠 w8S!%abl1 public static void sleep(int nSecond) k <iTjI*N { n{*D_kM(H try{ "*1f;+\ Thread.sleep(nSecond); {^a36i } D,v U catch(Exception e) "\C$ { Yb3mP!3q8Z e.printStackTrace (); GzXUU@p } ^!<dgBNj } H,3\0BKk OJ|r6 //日志 :}8Z@H!KkY public static void log(String sMsg) {%lXY Myu { W]M)Q}:Y System.err.println(sMsg); Mips.Bx } D"(L5jR8m@ g[RI.&? S{pXs&4O public static void log(int sMsg) ~c^>54 { e}/Lk5q! System.err.println(sMsg); Z>c3 } lGwl1,= } RqEH|EUZ ,mhQ"\ +C R'EUV0KX>Y /* 7w,FX.=;cv **TestMethod.java VVH.2&`I */ Unj.f>U package NetFox; voP7"Dl[ wN1niR' |8>3`w! public class TestMethod { dI&!e#Y j`^$# IG)s^bP public TestMethod() ;c~cet4 { ///xx/weblogic60b2_win.exe zJP6F.Ov! try{ @k[R/,#'[t SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); F<>!kK/c //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); dm0QcW4 SiteFileFetch fileFetch = new SiteFileFetch(bean); D]w!2k%V fileFetch.start(); xh7c VE[UM }
]#7zk9 catch(Exception e){e.printStackTrace ();} }bY;q- kB?al#` 7K)6^r^ } I2nF-JzD2a g?-lk5 |f~@8|MQP+ public static void main(String[] args) .CL^BiD.D { ee%fqVQ8P new TestMethod(); I}Nd$P)> } _ZY)M } ?\C"YG69T 点击下载更多相关资料
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