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/* WI{ ;#A **SiteFileFetch.java =-5[Hn% */ >9MS"t package NetFox; I3PQdAs~&h import java.io.*; *x!LKIpv import java.net.*; ?^. Pt 8 ip^] "O``7HA} public class SiteFileFetch extends Thread { DL1
+c`d 6uqUiRs() ']h
IfOD"r SiteInfoBean siteInfoBean = null; //文件信息Bean sjn:O' long[] nStartPos; //开始位置 ?aFZOc4
long[] nEndPos; //结束位置 5aG5BA[N FileSplitterFetch[] fileSplitterFetch; //子线程对象 (2tH"I long nFileLength; //文件长度 },s_nJR:8 boolean bFirst = true; //是否第一次取文件 xj7vI&u. boolean bStop = false; //停止标志 n$xszuNJ` File tmpFile; //文件下载的临时信息 MOeoU1Hn DataOutputStream output; //输出到文件的输出流 ZJvo9!DL|
h1*FPsc //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 5VZjDg? public SiteFileFetch(SiteInfoBean bean) throws IOException =|"=l1 { w&5/Zh[~~L siteInfoBean = bean; ntZ~m //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); "[.ne)/MC tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); +KP_yUq[ if(tmpFile.exists ()) fK"iF@=Z` { {[tZ.1.w bFirst = false;
#Z0-8<\ read_nPos(); (kY@7)d'e } 9DPb|+O- else %N1"*</q { djGs~H>;U_ nStartPos = new long[bean.getNSplitter()]; cWM: nEndPos = new long[bean.getNSplitter()]; 5NFRPGYX } a%*_2# 0MrN:M2B ^vM_kArA 1]Lh'.1^ } P7UJ-2%Y+ x0ne8NDP Why"G1` public void run() f"P$f8$ { _A3X6 //获得文件长度 U=DEV7 E //分割文件 Zw24f1iY //实例FileSplitterFetch 8i[LR#D) //启动FileSplitterFetch线程 N|<bVq% //等待子线程返回 [<S^c[47U try{ | k}e&Q_/G if(bFirst) t}~UYG(h~ { #Cx%OIi[f nFileLength = getFileSize(); Ld~ q1*7J if(nFileLength == -1) ?BsH{QRYQ { Wc\+x1 :8 System.err.println("File Length is not known!"); ZB0+GG\ } S<pkc8 else if(nFileLength == -2) 2vvh|?M { z7k$0& System.err.println("File is not access!"); P5P<" } tR;{. else q5?{1 { O5OXw] for(int i=0;i<nStartPos.length;i++) }hq^+fC? { Y/D-V nStartPos = (long)(i*(nFileLength/nStartPos.length)); HU9p!I. } `x2,;h!:)N for(int i=0;i<nEndPos.length-1;i++) ~1ps7[ { >f%, `r nEndPos = nStartPos[i+1]; JhH`uA& } 3.FR C nEndPos[nEndPos.length-1] = nFileLength; u#3)p } 1daL y } -=sf}4A Q1]Wo9j H `5Ct //启动子线程 O]bKNA.5 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; f:XfAH3R{ for(int i=0;i<nStartPos.length;i++) X|Dpt2A= { 0e\y~#- fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), j/'
g$ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ;h9W\Se nStartPos,nEndPos,i); z{/LX
\ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); tvT4S fileSplitterFetch.start(); B%mtp;) P } `0z/BCNB // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), B.RRdK+: siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); y;r"+bS8 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Ko+al {2 nEndPos = " + nFileLength); ` yYvYc // fileSplitterFetch[nPos.length-1].start(); K( z[} y+RRg[6| 69iM0X!'u //等待子线程结束 xl9(ze //int count = 0; :G0+;[?N //是否结束while循环 fyrd`R boolean breakWhile = false; >j:|3atb cd+^=esSO DyIV/ while(!bStop) -!~vA+jw1 { OW#_ty_ul write_nPos(); %",ULtZ+ Utility.sleep(500); ]zcV]Qj$~ breakWhile = true; bM5CDzH(#X lz}llLb1 *l{4lu for(int i=0;i<nStartPos.length;i++) !-ZP*V3}h { C/ if(!fileSplitterFetch.bDownOver) *_#&"(P { zWtj|%ts breakWhile = false; 9cz )f\ break; .aJ%am/:% } 7jT#BWt } =E1tgrW if(breakWhile) {KsVK4\r break; T\fudmj& Az9J\V~" b*`fLrqV. //count++; CC>($k" //if(count>4) 0Gx*'B= // siteStop(); CWBbSGk } ,#
eO& Lrlk* s.KOBNCFa System.err.println("文件下载结束!"); /k)
NP } jceHKl catch(Exception e){e.printStackTrace ();} pagC(F } 8:<1|]] jzQ I>u W#VfX!~ //获得文件长度 [NjajA~z>F public long getFileSize() 8;0^'Qr8 { ~T7\8K+ $ int nFileLength = -1; H(?e&Qkg try{ O'fc/cvh=' URL url = new URL(siteInfoBean.getSSiteURL()); M&OsRrq HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); pLPd[a httpConnection.setRequestProperty("User-Agent","NetFox"); Yx!n*+ :J s<,"Hsh^CR jOtzx"/)rE int responseCode=httpConnection.getResponseCode(); N" ; ^S if(responseCode>=400) 0S_Ra+e { K)Ge processErrorCode(responseCode); -CwWs~! return -2; //-2 represent access is error $6Z[|9W^A } ah>Dqb* t9]r
sZT VM9<) String sHeader; cmae&Atotw *%nX#mwz ONNW.xHp for(int i=1;;i++) 'h k @>" { so'eZ"A: //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); aC4m{F[ //Utility.log(in.readLine()); pIL`WE1' sHeader=httpConnection.getHeaderFieldKey(i); ijg,'a~3E if(sHeader!=null) w2'
3S#nZ { |NXFla if(sHeader.equals("Content-Length")) L^&do98 { 4">84,-N nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); eZ[#+0J break; iKY-;YK } I ;l`VtD } >" i~ x else N4tc V\O break; IK85D>00T } \/pVcR } N0=b[%g;n catch(IOException e){e.printStackTrace ();} E|\3f(aF catch(Exception e){e.printStackTrace ();} V`U/'N-ay b\H/-7< /oB K&r[( Utility.log(nFileLength); Gtf1}UJC 2 e) - f+CyhR"* return nFileLength; k#BU7Exij } uLF\K+cz 3$;J0{&[i ud5x$` //保存下载信息(文件指针位置) r*xq(\v private void write_nPos() S|tA[klh { l8eT{!4 try{ UX03"gX
output = new DataOutputStream(new FileOutputStream(tmpFile)); *pmoLiuB> output.writeInt(nStartPos.length); nsy!p5o for(int i=0;i<nStartPos.length;i++) zR_9D} { ^o,y5, // output.writeLong(nPos); ;H`=):U output.writeLong(fileSplitterFetch.nStartPos); Ti /;|lP@ output.writeLong(fileSplitterFetch.nEndPos); ,80jMs } f45x%tha % output.close(); tPQ2kEW } }6F_2S3c catch(IOException e){e.printStackTrace ();} NWaI[P catch(Exception e){e.printStackTrace ();} `>$gy/N } xtG)^x! $eTv6B?m }Z<D^Z~w //读取保存的下载信息(文件指针位置) r@\,VD6J private void read_nPos() 3ZLr"O1l ) { DX7Ou%P,mg try{ PpI+@:p[ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); K#%O3RRs int nCount = input.readInt(); Ov F8&*A nStartPos = new long[nCount]; EG8%~k+R nEndPos = new long[nCount]; Fa Qu$q for(int i=0;i<nStartPos.length;i++) HE8'N=0 { *)2x&~T*| nStartPos = input.readLong(); qQ3]E][/ nEndPos = input.readLong(); g9RzzE! } Djg1Qh input.close(); ,K"r:)\ } 6yV5Yjs catch(IOException e){e.printStackTrace ();} =P@M&Yy' catch(Exception e){e.printStackTrace ();} ";%e~
= } :T8u?@. qen44;\L WMt&8W5 private void processErrorCode(int nErrorCode) vY8WqG] { ^'
edE5 System.err.println("Error Code : " + nErrorCode); cN0~;!{i } XY&]T'A h Kp,4D>2_ ^^20vwq //停止文件下载 )m$1al public void siteStop() /1s 9;'I { AIIBd bStop = true; eUGmns for(int i=0;i<nStartPos.length;i++) !07FsPI#{ fileSplitterFetch.splitterStop(); A=\'r<: *+4>iL*: f=-!2#% } zM3H@;}m } ;@h'Mb //负责部分文件的抓取 ][T9IAn **FileSplitterFetch.java fJ|Bu("N */ 3"2<T^H] package NetFox; n]kQtjJ fS8XuT _ d(Ks9 import java.io.*; 9OO0Ht4j import java.net.*; i75?*ld `"^@[1 =PeW$q+ public class FileSplitterFetch extends Thread { x0TnS# *IjdN,wox ^Y*`D_-G String sURL; //File URL f6(9wz$Trt long nStartPos; //File Snippet Start Position jSOa long nEndPos; //File Snippet End Position q_%w
l5\F int nThreadID; //Thread's ID Y'+F0IZ+ boolean bDownOver = false; //Downing is over 8xeun~e"vS boolean bStop = false; //Stop identical *R9mgv[ FileAccessI fileAccessI = null; //File Access interface oK(W)[u VygXhh^7\ c DEe?WS public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ~I8"l@H> { q^T&A[hMPx this.sURL = sURL; P"h,[{Y*> this.nStartPos = nStart; 8O;rp(N.n this.nEndPos = nEnd; }SJLBy0 nThreadID = id; sbq44L) fileAccessI = new FileAccessI(sName,nStartPos);//定位 wKeSPs{x } S|=rF<]my f(9$"Vi gzJ{Gau{) public void run() 0N}
wD- { hoSU`X while(nStartPos < nEndPos && !bStop) }y-AoG { 4,R\3`b ?L~=Z\H D;
35@gtj try{ \e5,` URL url = new URL(sURL); JVIcNK) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "8C(_z+]K` httpConnection.setRequestProperty("User-Agent","NetFox"); OA8b_k~ String sProperty = "bytes="+nStartPos+"-"; F~uA-g httpConnection.setRequestProperty("RANGE",sProperty); %l]rQjV- Utility.log(sProperty); `)gkkZ$)j
!]jNVg * zJiii InputStream input = httpConnection.getInputStream(); M%Kx{*aw& //logResponseHead(httpConnection); 'piF_5(@ Hhce:E@K b$$L]$q2 byte[] b = new byte[1024]; 6r-<XNv)0 int nRead; zxynEdO while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) xVwi
}jtG| { cvLcre% >A nStartPos += fileAccessI.write(b,0,nRead); 4)>\rqF+v //if(nThreadID == 1) hnfrnYH // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); QeOt;{_| } S92!jp/ MM58w3Mz #dn%KMo2r Utility.log("Thread " + nThreadID + " is over!"); $BO}D bDownOver = true; EF7|%N //nPos = fileAccessI.write (b,0,nRead); fAA@ziKg } ss M9t catch(Exception e){e.printStackTrace ();} d9e H}#OY } JwG5#CFu^ } e^l+#^fR N4GIb 6 uzn))/" //打印回应的头信息 /EAQ.vxI public void logResponseHead(HttpURLConnection con) l8n[8AT1 { ]qP}\+: for(int i=1;;i++) ?RjKP3P { #.t$A9' String header=con.getHeaderFieldKey(i); u3?Pp[tM< if(header!=null) MdTd$ 4J3 //responseHeaders.put(header,httpConnection.getHeaderField(header)); )*QTxN Utility.log(header+" : "+con.getHeaderField(header));
"lnk else +
1%^c(3 break; =jd=Qs IL } pa> 2JF* } 1_E3DXe :92a34 ~4
x Ba:*z public void splitterStop() (k HQKQmq { YI(OrR;V bStop = true; H f mMf^c } BrH`:Dw }Us$y0W\ @snLE?g j } $!3t$-TSD 4sD:J-c +M%2m3.Jo /* !v;_@iW3e **FileAccess.java +H^V},dBp! *//文件访问(定位,写) qFsg&< package NetFox; o4
OEA)k)= import java.io.*; Y
Z2VP j!8+|eAkk a0W\? public class FileAccessI implements Serializable{ L"^366M! 0 Ln5e.& //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 1R~WY'Ed RandomAccessFile oSavedFile; |"E9DD]{ long nPos; YGO 7lar r#w_=h) )aA9z(x public FileAccessI() throws IOException s/&]gj" { `j"G=%e3. this("",0); G78j$
^/0 } %_=R&m'n` fvfVBk# o 0
#]EMr public FileAccessI(String sName,long nPos) throws IOException U$JIF/MO_ { WsDe0F oSavedFile = new RandomAccessFile(sName,"rw"); >\x
39B this.nPos = nPos; X|B;>q oSavedFile.seek(nPos); I\6<)2j/L } DT]p14@t9 :mHtK)z~ pPoC61F public synchronized int write(byte[] b,int nStart,int nLen) ]M"'qC3g { Lj1 @yokB int n = -1; J0W).mD_H try{ TK?+O}v-]! oSavedFile.write(b,nStart,nLen); !OVEA^6 n = nLen; kxf=%<l } s^@Cq= catch(IOException e) ?Pw\&q { _5`S)G{ e.printStackTrace (); X',0MBQ0 } q _|5,_a ?v~3zHK 0!\q return n; 7Cp_41._ } 0BD((oNg (SVr>|Db 9+Hb` } To?
bp4 a-2
{x2O zW`koRH@ /* U+M?<4J)" **SiteInfoBean.java ]+7c1MB(5 */ O +}EE^*a package NetFox; Rw8m5U Q31c@t oT{yttSNo public class SiteInfoBean { 9yAu<a 1Sk6[h'CL
r@UY$z private String sSiteURL; //Site's URL M.^A` private String sFilePath; //Saved File's Path `bF;Ew; private String sFileName; //Saved File's Name =_6h{f&Q private int nSplitter; //Count of Splited Downloading File ?O
Nw*"9 y.<Y]m 3m7V6##+ public SiteInfoBean() 5FKd{V' {//nSplitter的缺省值为5 {# _C //default value of nSplitter is 5 f+~!s 2uw this("","","",5); ; O0rt1 } -RDs{c`y%N @&yj7-] ebK
wCZwK* public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) agD.J)v\ { MCG~{#` sSiteURL= sURL; Q
kpmPQK sFilePath = sPath; HN@)/5BY sFileName = sName; a/#,Y<kJ this.nSplitter = nSpiltter; UH|.@7w BQg]$Tr? gP%! } @!O{>` :[03upyS |:[vpJFK public String getSSiteURL() uelTsn { +N_%|!F-c return sSiteURL; 'A2"&6m)28 } _8`;Xgp VbR.tz 0+i,,^x. public void setSSiteURL(String value) +[`%b3N k { 5~0;R`D sSiteURL = value; 1`\kXaG } Mp=+*I[ RtL'fd _3[BS9 public String getSFilePath() 6s2g +[ { Ma#-'J return sFilePath; m/Z_ HER^ } hh}EDnx NZP,hAUK, B[V=l<J public void setSFilePath(String value) _,~zy9{, { f'U]Ik;Jy sFilePath = value; e[!>ezaIY } eO G%6C%a )>p6h]]a >FNt*tX<0 public String getSFileName() "FS.&&1( { L9)&9
/f return sFileName; |pY0IqO } RoRVu,1 iKY&gnu" _AHVMsz@ public void setSFileName(String value) YfKty0 { V|7CYkB8 sFileName = value; 4/|=0TC; } UMaKvr-C& KW<CU' Um<vsR public int getNSplitter() -Ma"V { tEs$+b return nSplitter; ZeZwzH)BD } =T]OYk ")OLmkC $ 1ZY
Vw public void setNSplitter(int nCount) ]"6<"1) { L+L9)8FJ nSplitter = nCount; 06$9Uz9 } P0=F9`3wb } h@d
m:=ul =
xk@ Q7$ 5WYU&8+]{: /* DM9 5Il[/ **Utility.java uX[
"w| */ Ex3woT- package NetFox; +n dyR r
N7"%dx HV(Kz public class Utility { Jt8 v=<@ !Ao?bs' y]_DW6W public Utility() p'*UM%@SIY { 9iE66N>z _JH6bvbQ cw\a,>]H } x7?{*w&r rGWTpN //线程睡眠 Xk$lQMwZ public static void sleep(int nSecond) .w~USJ=X { tDo0Q/` try{ ;+U9; Thread.sleep(nSecond); T_WQzEL^ } n C^'2z catch(Exception e) uM8gfY)OI { 9D,&)6 e.printStackTrace (); Up&q#vqIj } E_oe1C: } U?QO'H5 rL=$WxdPU //日志 j*{bM{~T< public static void log(String sMsg) cx|j
_5%i { $/H'Dt6x System.err.println(sMsg); G.}yNjL8 } @w0[5ZAj (EX w3@te\ public static void log(int sMsg) x-<dJ}` { qJ@?[|2R System.err.println(sMsg); $H^6I8> } he Wb(E& } ,l6W|p?ZO^ KB5{l%> |zMQe}R@% /* 8~i@7~
J **TestMethod.java VA0TY/{
] */ !Xm: $KH package NetFox; 7}Sw(g)o7 Q$%@.@ |1D`v9 public class TestMethod { nCrNZ&P Mw~?@Sq AZa3!e/1 public TestMethod() kBzzi^cl { ///xx/weblogic60b2_win.exe gT.-Cf{ try{ o;.-I[9h] SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5);
r2G<::<zL //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ezn>3?S SiteFileFetch fileFetch = new SiteFileFetch(bean); Ut+m m\7 fileFetch.start(); bA)Xjq)Rr } ^?2txLv,6 catch(Exception e){e.printStackTrace ();} [3.rG!Na HIF]c 1f=L8Dr } Vr*t~M> 1}6pq2 -cKR15 public static void main(String[] args) F,sT[C { sR6(8 new TestMethod(); aqB^ %e } 0e7!_/9 } YblRwic 点击下载更多相关资料
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