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/* K)NB{8 _ **SiteFileFetch.java P#e1? */ {NmpTb package NetFox; <cC 0l-= import java.io.*; Djv0]Sm^! import java.net.*; iWCR5c= BS-nn y w[`2t{^j public class SiteFileFetch extends Thread { Po+I!TL' #<_gY sK1YmB :~a SiteInfoBean siteInfoBean = null; //文件信息Bean oWCy%76@ long[] nStartPos; //开始位置 4sU*UePr long[] nEndPos; //结束位置 j?!BHNs FileSplitterFetch[] fileSplitterFetch; //子线程对象 ~Sq!P long nFileLength; //文件长度 :{#%_^}k boolean bFirst = true; //是否第一次取文件 \}CQo0v boolean bStop = false; //停止标志 cJb.@8^J File tmpFile; //文件下载的临时信息 <P)U Ggd DataOutputStream output; //输出到文件的输出流 8GRp1'\Hi jC<1bf$K //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) syuW>Z8s public SiteFileFetch(SiteInfoBean bean) throws IOException 2'R;z<_ { ?-'m#5i" siteInfoBean = bean; /-Saz29f^Q //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); FE}!I
tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); >j5,Z] if(tmpFile.exists ()) jg2UX { 93Z/|7 bFirst = false; m
2tw[6M read_nPos(); PKDzIA~T } d4y?2p ?3 else 5U%J,W { b=V"$(Q nStartPos = new long[bean.getNSplitter()]; , 7` /D nEndPos = new long[bean.getNSplitter()]; !Q-h#']~L } j=raS fW/G_ ixK&E#
XUI9)Ne } $-HP5Kj(k- y r4j jO` b&]0 public void run() ;3 N0) { r>!$eqX_ //获得文件长度 _G$SA-W( //分割文件 pN\YAc*@: //实例FileSplitterFetch hLs<g!*O //启动FileSplitterFetch线程 x2q6y //等待子线程返回 $0uh8RB try{ "c0I2wq if(bFirst) Uavr>- { Z*AT &7 nFileLength = getFileSize(); GM1z@i\5 if(nFileLength == -1) }}R?pU_ { )@vhqVv? System.err.println("File Length is not known!"); &sFEe< } li!3bv else if(nFileLength == -2) iD;pXE{2s% { [C8lMEV~ System.err.println("File is not access!"); %kS4v,I } =r w60B else =H<I` J' { *=sMJY9#jE for(int i=0;i<nStartPos.length;i++) x,U'!F { 0_!')+ nStartPos = (long)(i*(nFileLength/nStartPos.length)); 4trP*u,4 } tHhau.! for(int i=0;i<nEndPos.length-1;i++) s}
I8:ufT { W0zRV9"P nEndPos = nStartPos[i+1]; ]xx}\k } F&tU^(7< nEndPos[nEndPos.length-1] = nFileLength; iy<|<*s2D } (-<s[VnXP }
U(d K .Yw L|?$F*bs //启动子线程 "aU)
[ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; :.k1="H~@ for(int i=0;i<nStartPos.length;i++) `u<\
4&W { 1*x;jO>Hk fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ?S*Cvr+=4 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), bvay7 nStartPos,nEndPos,i); Nld y76|g Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ;S&PLgZ fileSplitterFetch.start(); s6U$]9 ` } '-,$@l# // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /?ZO-]q siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Qkvg85 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", YaBZ#$r nEndPos = " + nFileLength); Gu#Vc.e // fileSplitterFetch[nPos.length-1].start(); 3R}O3#lj, y[D8r Fw Q[vQT?J7 //等待子线程结束 Y94^mt- //int count = 0; X7bS{GT //是否结束while循环 ?Z0NHy;5 boolean breakWhile = false; \80W?9qj r_x|2 AoO ~E8L,h~ while(!bStop) #JAy { eP?=tUB!S write_nPos(); ir{li?kV Utility.sleep(500); ?W3l breakWhile = true; mTj?W$+r H@'f=Y*D &Hi;> for(int i=0;i<nStartPos.length;i++) %W(/W9B$/F { -MK9IO]i if(!fileSplitterFetch.bDownOver) f?qp* { {^T_m)|n breakWhile = false; j; MQ_?"iN break; L0Ycf|[s, } +W%3VV$ } %tE#%;Z if(breakWhile) 4:I'zR5 break; ^pysoaZCT_ svaclkT= nI
es}n: //count++;
TwI'}J|w //if(count>4) F"ua`ercI // siteStop(); n^t!+ } D}MCVNd^ lEYAq'= S;8gX1Uf System.err.println("文件下载结束!"); W]CsKN,K } ~Z>!SMXp< catch(Exception e){e.printStackTrace ();} 6Mj(B*c } Z1y=L$t8 .N>Th/K8 vTl7x //获得文件长度 W\pO`FL public long getFileSize() m<e_Z~ ^G { ~PtIq.BY int nFileLength = -1; @2;/-,4O try{ fP KFU URL url = new URL(siteInfoBean.getSSiteURL()); bzWWW^kNL HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); k9_c<TSzu httpConnection.setRequestProperty("User-Agent","NetFox"); Ncr*F^J4 YAsE,M+ =j~vL`d2] int responseCode=httpConnection.getResponseCode(); a/{M2 if(responseCode>=400) VR XK/dZ { |[W7&@hF processErrorCode(responseCode); ccY! OSae return -2; //-2 represent access is error :Ldx^UO } 0@tN3u?dx P#l"`C
/ MJ M< String sHeader; *~\R0ddz [e`e bn[C u Wxl\+_i for(int i=1;;i++) M~ku4ZP { NiSH$MJ_ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); [vTk*#Cl4 //Utility.log(in.readLine()); ~wFiq)v( sHeader=httpConnection.getHeaderFieldKey(i); iF*L- if(sHeader!=null) J|aU}Z8m { *hIjVKTu79 if(sHeader.equals("Content-Length")) V%Ww;Ca]I { :[J'B4>9 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); mv{bX|. break; sKwUY{u\M } [:(hqi! } T&nIH[}v else E0)43 break; D$U`u[qjtS } Pk{%2\%&2 } d#CAP9n;' catch(IOException e){e.printStackTrace ();} ^N&@7s catch(Exception e){e.printStackTrace ();} X]4j&QB ]S 3l' " \ RS
,Y Utility.log(nFileLength); t`")Re_j eXAJ%^iD Q#5~"C return nFileLength; 0^83:C
^{ } \h@3dJ4
rK[;wD< tUk)S //保存下载信息(文件指针位置) Bp-e< : private void write_nPos() dT7!+)s5- {
hEq-)-^G try{ -oT3`d3 output = new DataOutputStream(new FileOutputStream(tmpFile)); ~0Z.,p_ output.writeInt(nStartPos.length); KA? J: for(int i=0;i<nStartPos.length;i++) lw43|_'G-t { %j/}e>$"Nk // output.writeLong(nPos); dwqR,| output.writeLong(fileSplitterFetch.nStartPos); \IP
9EF A output.writeLong(fileSplitterFetch.nEndPos); uH |:gF^ } P?hB`5X output.close(); %W^Zob } ?k^~qlye catch(IOException e){e.printStackTrace ();} ?UV|m catch(Exception e){e.printStackTrace ();} b ;>?m } ML.|\:r* Nj{; 0{(5J,/BF //读取保存的下载信息(文件指针位置) oTg
'N private void read_nPos() dC>(UDC { ,Bs/.htQj try{ tz9"#=}0 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); tu' s]3RE int nCount = input.readInt(); 4hx4/5[^ nStartPos = new long[nCount]; 6w4HJZF~ nEndPos = new long[nCount]; 'Pe;Tp>` for(int i=0;i<nStartPos.length;i++)
no(or5UJ { ldnKV&N nStartPos = input.readLong(); :3[;9xCHj nEndPos = input.readLong(); }=d}q * } k\X yR4r input.close(); 8RT<?I^5 } Gdz* catch(IOException e){e.printStackTrace ();} [P`<y#J3F catch(Exception e){e.printStackTrace ();} zvn3i5z } >U)>~SQf P~;1adi3 ~3)d?{5 private void processErrorCode(int nErrorCode) ~;}uYJ { "fC>]iA8I System.err.println("Error Code : " + nErrorCode); I2WWhsNC } 1<Vke$ $IqubC>O :{9HsF"h0 //停止文件下载 ]P e8G(E! public void siteStop() )jjL' { *|ef #-|D bStop = true; 1&RB=7.h for(int i=0;i<nStartPos.length;i++) io UO0 fileSplitterFetch.splitterStop(); P4:Zy;$v! FXul
u6"SX Fl!D2jnN } &88c@Ksn } 2U3e!V //负责部分文件的抓取 C]&/k_k **FileSplitterFetch.java ?)H:.]7-x */ Sd/7# package NetFox; 85USMPF *D67&/g. .hJcK/m import java.io.*; ]&s@5<S[ import java.net.*; (Q=:ln;kM <cO
`jK M)~sL1) public class FileSplitterFetch extends Thread { -O\fy! BO2s(8 R$`%<Y3) String sURL; //File URL xDNXI01o long nStartPos; //File Snippet Start Position R'pfA
B|! long nEndPos; //File Snippet End Position M+I9k;N6& int nThreadID; //Thread's ID ,/&|:PkS boolean bDownOver = false; //Downing is over JNo[<SZb boolean bStop = false; //Stop identical sR^b_/ElxT FileAccessI fileAccessI = null; //File Access interface t'Zv)Wu1E ]Upr<! Bus]OF>hu public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 4dy!2KZN { P`avn
this.sURL = sURL; -qBdcbi|x) this.nStartPos = nStart; aQ-SrxmO8 this.nEndPos = nEnd; > Edsanx nThreadID = id; 86>@.:d fileAccessI = new FileAccessI(sName,nStartPos);//定位 sN K^.0 } r4d#;S9{o {|'NpV M9G?^mW1sT public void run() %K,cGgp^) { 4I9Yr while(nStartPos < nEndPos && !bStop) 2Bi?^kQ# { @?RaU4e u@tH6k*cBz -hq^';, try{ ?dXAHY URL url = new URL(sURL); .[+}nA,g%~ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); `KZu/r-M9 httpConnection.setRequestProperty("User-Agent","NetFox"); K'B*D*w String sProperty = "bytes="+nStartPos+"-"; _GM?` httpConnection.setRequestProperty("RANGE",sProperty); >
H&v Utility.log(sProperty); P 5.@LN MS:,I? Dp4x\97O InputStream input = httpConnection.getInputStream(); Bw~jqDZ}| //logResponseHead(httpConnection); L9oLdWa(C 6&QOC9JW+7 x4h.WDT$ byte[] b = new byte[1024]; Gqj(2.AY int nRead; 4 Dy1M}7 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) @R<z=n" { /ZM
xVh0 nStartPos += fileAccessI.write(b,0,nRead); 9m)gp19YA //if(nThreadID == 1) LG:d
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6"NtVfui } X(BX+)YR eeBW~_W gW<4E=fl Utility.log("Thread " + nThreadID + " is over!"); 5$Kd<ky bDownOver = true; OT(0~,.GJ //nPos = fileAccessI.write (b,0,nRead); y}is=h3 } u8t|!pMF8 catch(Exception e){e.printStackTrace ();} Mp=T;Nz } p+5J } p]<)6sZ T]/5aA4 VLVDi>0i //打印回应的头信息 5<e{)$C public void logResponseHead(HttpURLConnection con) U ^nv) { /r2S1"(q for(int i=1;;i++) !D ?(}nag { YQtq?&0Ct String header=con.getHeaderFieldKey(i); ]')y(_{ if(header!=null) %YbL%i|U //responseHeaders.put(header,httpConnection.getHeaderField(header)); mnBTZ/ZjS Utility.log(header+" : "+con.getHeaderField(header)); }%AfZ2g;h else A6J:!sY4A break; -ssmj8:Q\| } >&ZlCE } `7'^y 2h#.:!/SMw T1R~^x1 public void splitterStop() ~]].i~EV( { OnhR` bStop = true; ]*g f$D } q/Vl>t ^)GaVL^"5 fUfd5W1" } aOd|;Z KJv%t_4'F `(gQw~|z /* cK2;)&U7 **FileAccess.java Ux{0)"fj *//文件访问(定位,写) 3)L#V
. package NetFox; =CD.pw)B1 import java.io.*; !
2knSS M,X)rM}Q p Q!lY public class FileAccessI implements Serializable{ ~:PM_o*6 oO`a {n- //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 4)>UTMF RandomAccessFile oSavedFile; %Ofw"W long nPos; .t8hTlV?<B /I1n${{5 w<zzS:PF* public FileAccessI() throws IOException ,qo^G0XO { mXS"nd30bD this("",0); R'6(eA[K } mlLqQ< 'n1$Y%t .{ZJywE< public FileAccessI(String sName,long nPos) throws IOException J7C?Z { HG< z,gE
2 oSavedFile = new RandomAccessFile(sName,"rw"); -T i<H9OV this.nPos = nPos; C9!FnvH oSavedFile.seek(nPos); `p1B58deC } k Jw
Pd;% Q+wO\TtE J]w3iYK public synchronized int write(byte[] b,int nStart,int nLen) )siWc_Z4 { lkly2|wA int n = -1; BlZB8KI~ try{ ~c]
q:pU2 oSavedFile.write(b,nStart,nLen); jIwN,H1$- n = nLen; ){z#Y#]dP } tw=A]
a* catch(IOException e) k.2GIc:5 { 9;uH}j8sE e.printStackTrace (); ),y`Iw } 8~yP?#p UjLq[,_! BOR$R}q return n; g kV`ZT9 } K"|~D0Qgo #_`p
0wY ^$C&{% } :VWN/m MK @rx6<9 jJNl{nyq /* 3TLym& **SiteInfoBean.java J]zhwM */ @o*~\E<T package NetFox; M(:bM1AD`u :SW
vH- ] CB,2BTtRE public class SiteInfoBean { TQ:e!
32 KaS*LDzw PC+Soh* private String sSiteURL; //Site's URL ?Q+*[YEJ5 private String sFilePath; //Saved File's Path KKb7dZbt< private String sFileName; //Saved File's Name
zY@0R`{@p private int nSplitter; //Count of Splited Downloading File NS""][# .Ln98#ZR 64'QTF{D public SiteInfoBean() =qoOr~ {//nSplitter的缺省值为5 ;($xAAR //default value of nSplitter is 5 9z{g3m70@ this("","","",5); tS5J{j>T } #G?#ot2o f*88k='\W (UhJ Pco" public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) }EHL
}Q { BzH0"xq^ sSiteURL= sURL; _TmKn!Jw sFilePath = sPath; 0_-o]BY sFileName = sName; iR PE0 this.nSplitter = nSpiltter; @%*@Rar n%RaEL >?)_, KL } YU`k^a7%
"VHT5k ~`^kP.() public String getSSiteURL() BB9eQ:
xO { $cuBd return sSiteURL; Vr"'O6 } ^+-]V9?+ [{#TN _
W#Km public void setSSiteURL(String value) &iq'V*+-\ { WA1yA*S sSiteURL = value; \ZhkOl } 0S4Y3bac& n[qnrk*3
% 5D?{dA:Rq public String getSFilePath() $I/ !vV { c+7I return sFilePath; d8R|0RZ } #*lDKn[vO q[W@.[2y) d2US~.;>l public void setSFilePath(String value) 7QZyd- { xXI WEZA sFilePath = value; 5 8L@:>" } |; mET
&e3}Vop yw%ES public String getSFileName() L0H^S)g { '/Vm[L$d return sFileName; ;"e55|d9I } b "}ya/ IG;=
| Oml3=TV public void setSFileName(String value) [T)>RF { >Wx9a"H^( sFileName = value; Q>;Aq!mr= } W> Pcj EI 4T"L#o1 V4CA*FEA public int getNSplitter() D'{o3Q,%K { nygeR|:\ return nSplitter; vl}}h%BC } Xkx&'/QG,U pNuU{:9 B0 nehk8+eV_ public void setNSplitter(int nCount) 2$b1q!g< { n!~QC nSplitter = nCount; 0R+p\Nc&1 } wt'"<UN } ){u#
(sW [I'q"yRu]i 1|G5 W: /* p14$XV **Utility.java k%-UW% */ H15!QxD# package NetFox; &`>dY
/Y p<Tg}fg GMLx$?=j public class Utility { \>w 2D <; Td8O89_ ?;(!(<{ public Utility() JJM!pD\ h { $Op:-aW& 8Jp?@qt=$ $(OL#>9Ly } G%i&C)jZ ~"wnlG-: //线程睡眠 @^-f+o public static void sleep(int nSecond) }095U(@ { ov\%*z2= try{ 673G6Nk Thread.sleep(nSecond); :'fK`G
6 } ,y/m5-D! catch(Exception e) &@2`_%QtA { :,/
\E e.printStackTrace (); sv "GX<+ } g&ba]?[A } ^Ga_wJP8S RJN
LcIm //日志 o@} qPvt0 public static void log(String sMsg) HC>k/Gk" { 4`r-*Lx System.err.println(sMsg); ashVV~\8A } 91T[@p eD^(*a>( F:0 E-
z' public static void log(int sMsg) (~b0-3s { jt9@aN.mJN System.err.println(sMsg); OQyZ' } 3A\Hiy!{F } %6@m~;c0 pf=CP%L {gDoktC@M /* ^*~4[?]S **TestMethod.java ?DNeL;6 */ &,]yqG 2 package NetFox; Aj> )hK;27m4 UC00zW<Z@" public class TestMethod { 3+M+5 f-}_ >Y:veEa6v6 public TestMethod() 9!D
c= { ///xx/weblogic60b2_win.exe :{Iv
]d try{ gaL.5_1 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); h#|A c>fz //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); &23t/` SiteFileFetch fileFetch = new SiteFileFetch(bean); =VZ0+Yl fileFetch.start(); M3)Id?|]6 } Vt4,?" catch(Exception e){e.printStackTrace ();} y#lg)nB w/CD- 9v}vCg } fEyc3K'5V h&bs` ^"$~&\+x5 public static void main(String[] args) ;,u7) { x&FBh!5H new TestMethod(); <L3ig%#B } 1|3vwgRhs } F;Ubdxwwl 点击下载更多相关资料
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