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/* L~Xzo **SiteFileFetch.java "Q[?W(SA */ f!B\X*| package NetFox; 7K24sHw;% import java.io.*; XU`vs`/ import java.net.*; VexQ ] #*"I?B/fd8 6MQyr2c public class SiteFileFetch extends Thread { O7f"8|=HX 2=n,{rkmj% u X(#+ SiteInfoBean siteInfoBean = null; //文件信息Bean KP
gzB^> long[] nStartPos; //开始位置 S6{y%K2y& long[] nEndPos; //结束位置 CmtDfE FileSplitterFetch[] fileSplitterFetch; //子线程对象 ~W_T3@ long nFileLength; //文件长度 k.%FGn'fR boolean bFirst = true; //是否第一次取文件 uAV-wc boolean bStop = false; //停止标志 i >BQRbU File tmpFile; //文件下载的临时信息 4BJ w+EV8 DataOutputStream output; //输出到文件的输出流 q)RTy|NJ^ 41i#w;ojI //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) W'5c%SI public SiteFileFetch(SiteInfoBean bean) throws IOException KtaoU2s { T{*!.+E siteInfoBean = bean; `m-7L //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); T{lK$j tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); q]gF[&QZ if(tmpFile.exists ()) *,e`. { ifadnl26
s bFirst = false; Gp1?drF6 read_nPos(); eMU t%zvb } x#'v}(v else G@,XUP { =u.hHkx nStartPos = new long[bean.getNSplitter()]; Wtp;se@# nEndPos = new long[bean.getNSplitter()]; W<Asr@ } +wm%`N;v< `q7X(x }IV=qW, j$r2=~1 } 8/W2;>?wKc [f`7+RHrd ;_A?Zl} public void run() et@<MU@` { :Mq{ES% //获得文件长度 Uq(fk9`6 //分割文件 TL: 6Pe //实例FileSplitterFetch R(GL{Dh}L //启动FileSplitterFetch线程 N[sJ5oF //等待子线程返回 w!52DBOe+ try{ EskD)Sl if(bFirst) yzyK$WN\[3 { +?GsIp@>jh nFileLength = getFileSize(); 4X$|jGQ\ if(nFileLength == -1) d{(NeT s { 1raq;^e9 System.err.println("File Length is not known!"); fD2)/5j1 } {w<"jw&2 else if(nFileLength == -2) C]ef
`5NR] { A0H6}53, $ System.err.println("File is not access!"); *m[[>wE } {,e-;2q else G@o\D-$ { noO#o+
Jg# for(int i=0;i<nStartPos.length;i++) B;J8^esypD { v`r*Yok;` nStartPos = (long)(i*(nFileLength/nStartPos.length));
T}Ve:S } &Yd6w}8 for(int i=0;i<nEndPos.length-1;i++) vg*~t3{ L { 9rgvwko nEndPos = nStartPos[i+1]; y`J8hawp } 5a2+6N nEndPos[nEndPos.length-1] = nFileLength; E>bpq^;r } h<bCm`qj } .FA99|: F?b"Rv yhd]s0(! //启动子线程 R#HX}[Hb fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; B9S@G{` for(int i=0;i<nStartPos.length;i++) \qtdbi|Y { t/h,-x fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
wnHfjF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ;1q|SmF nStartPos,nEndPos,i); (9v%66y Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); NF'<8{~ fileSplitterFetch.start(); &A~hM[- } Dfy=$:Q // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), RhkTN'vO siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); \W7pSV-U // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", DC2[g9S>8@ nEndPos = " + nFileLength); B{>x // fileSplitterFetch[nPos.length-1].start(); !HKW_m^3J lg*?w/JX+ L)"CE]. //等待子线程结束 a7jE*%f9 //int count = 0; sCE%./h] //是否结束while循环 {TaYkuWS boolean breakWhile = false; nBwDq^ 3zMaHh)mj )C0d*T0i while(!bStop) J>1%*Tz { O"J"H2}S write_nPos(); ^ LVKXr Utility.sleep(500); Bv#?.0Ez; breakWhile = true; huvn_ rTim1<IXR H{1'- wB for(int i=0;i<nStartPos.length;i++) _}tPtHPa/ { n_kE if(!fileSplitterFetch.bDownOver) '1X^@]+6 { ,>Dpt< breakWhile = false; }H|'W[Q. break; |qpFR)l } RV%)~S@!R } vb3hDy if(breakWhile) 8WC_CAP break; 0bteI*L ZtY?X- 4_ ~Gl5O`w( //count++; d
'\^S} //if(count>4) 0 gR_1~3 // siteStop(); S}qGf%
} rA}mp] k+~2
vmS (,b\"Q System.err.println("文件下载结束!"); p!K^Q3kO } B_>r|^Vh catch(Exception e){e.printStackTrace ();} `W.g1"o8W4 } QWE\Ud.q p$cb&NNh*H i!iG7X)qT //获得文件长度 "bz]5c~ public long getFileSize() c-U]3`;Q { e@iz`~[ int nFileLength = -1; V>c !V9w try{ J+}z*/)|# URL url = new URL(siteInfoBean.getSSiteURL()); oWEzzMRz HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); m]c1DvQb httpConnection.setRequestProperty("User-Agent","NetFox"); ()5X<=i H~bbkql .@$A~/ YU int responseCode=httpConnection.getResponseCode(); 6W:FT Pt44 if(responseCode>=400) j1=su~ { m[Mw2 F processErrorCode(responseCode); G!lF5;Ad` return -2; //-2 represent access is error pl/ek0QX } ]}n|5 ZO>)GR2S [}l#cG6 k String sHeader; t*`Sme]"B eKf5orN u#NX`_ for(int i=1;;i++) 4j(`koX_ { WJMmt XO //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); p3e=~{v* //Utility.log(in.readLine()); ^tIYr<I sHeader=httpConnection.getHeaderFieldKey(i); 4/OmgBo' if(sHeader!=null) tlB-s; {
n%Oq"`w4 if(sHeader.equals("Content-Length")) Q{CRy-ha { ppGWh nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); @FF80U4' break; `qRyh}Ax" } _-2ntO<E } 5&xbGEP$ else M{SJ8+G break; ]dgi]R|` } + WT?p] } VCwC$ts catch(IOException e){e.printStackTrace ();} Yv0y8Vz@ catch(Exception e){e.printStackTrace ();} BCtKxtbS f?>
?jf &.qLE Utility.log(nFileLength); P)LOAe1' Ihv@2{*(b mP's4 return nFileLength; BqUwvB4 } ,
K:d/ tH#t8Tq5x HMDuP2Y //保存下载信息(文件指针位置) 6cD3(// private void write_nPos() ^f9@=I { /:"^,i\t try{ ]c
bXI output = new DataOutputStream(new FileOutputStream(tmpFile)); g:@4/+TSt output.writeInt(nStartPos.length); F>GPi!O for(int i=0;i<nStartPos.length;i++) [f}`reRlZ { 5.D0 1?k // output.writeLong(nPos); Pq@-`sw output.writeLong(fileSplitterFetch.nStartPos); sL;;'S& output.writeLong(fileSplitterFetch.nEndPos); <[ u(il } GVfRy@7n output.close(); #Nad1C/] } VTY # { catch(IOException e){e.printStackTrace ();} 1.TIUH1 catch(Exception e){e.printStackTrace ();} &Pc.[k } /1$u|Gs
* 7|jy:F,w% >V4r'9I //读取保存的下载信息(文件指针位置) f1sp6S0V\ private void read_nPos() I
zVc { #2"'tHf4 try{ 9+/D\|"{ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); V]m}xZ'?^ int nCount = input.readInt(); s_^N=3Si
nStartPos = new long[nCount]; %@|)&][hO nEndPos = new long[nCount]; kUfb B#.5L for(int i=0;i<nStartPos.length;i++) @Ae&1O;Zh { YY(_g|;?8 nStartPos = input.readLong(); 9c[bhGD? nEndPos = input.readLong(); 53d`+an2 } Cl3L)
input.close(); Br.UN~q }
V<?0(esgR catch(IOException e){e.printStackTrace ();} |WSpWsr, catch(Exception e){e.printStackTrace ();} RCoDdtMo } Jd',v }EP}D?Mmu ii>^]iT private void processErrorCode(int nErrorCode) /I{K_G@ { 8&3&^!I System.err.println("Error Code : " + nErrorCode); p"- %~%J= } esq~Ehr= BOP7@ D RLzqpE<rJ //停止文件下载
?P4y$P public void siteStop() V?mk*CU { 4mtO"'| bStop = true;
n_k`L(8* for(int i=0;i<nStartPos.length;i++) 3Bvz& `\ fileSplitterFetch.splitterStop(); -$_FKny B-$zioZ wXZ9@(^ } &9z`AY]> } eu~ u-}. //负责部分文件的抓取 ~%eE%5!k **FileSplitterFetch.java O(v>\MV */ B9$pG package NetFox; [_(uz,' :UAcS^n7h" />pAZa import java.io.*; k\9kOZW import java.net.*; QDVSFGwr X.FoX Bj9FSKiH public class FileSplitterFetch extends Thread { _HjB'XNr( SuNc&e#( 33wVP}e5 String sURL; //File URL MPn/"Fij$ long nStartPos; //File Snippet Start Position +$xw0)| long nEndPos; //File Snippet End Position 7i'clB9! int nThreadID; //Thread's ID )s4:&! boolean bDownOver = false; //Downing is over N}<!k#d
E boolean bStop = false; //Stop identical ~4Mz:h^ FileAccessI fileAccessI = null; //File Access interface g0 ;;+z |T/s>OW p$= 3$I public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException S3$C#mHX { Om>?"=yD E this.sURL = sURL; g{uiY| this.nStartPos = nStart; )EQI>1_ this.nEndPos = nEnd; m-+>h:1b|9 nThreadID = id; 5w{U/v$Z fileAccessI = new FileAccessI(sName,nStartPos);//定位 (FZ8T39 } ?<Hgq8J b$_qG6)IJO p@O,-&/D public void run() z@?y(E { }NRt:JC while(nStartPos < nEndPos && !bStop) qs= i+ { mwN"Cu4t m7RyFnR2 .j"heYF) try{ x\yr~$}(J URL url = new URL(sURL); ;]=@;? 9 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); o4@d,uIw^ httpConnection.setRequestProperty("User-Agent","NetFox"); iTs"RW String sProperty = "bytes="+nStartPos+"-"; :#_k`{WG httpConnection.setRequestProperty("RANGE",sProperty); i,%N# Utility.log(sProperty); z4` :n. $sZ4r>- Z#[%JUYp' InputStream input = httpConnection.getInputStream(); +ZGH //logResponseHead(httpConnection); k6GQH@y! `[XH=-p 0;,Y_61
byte[] b = new byte[1024]; ;=E}PbZt2 int nRead; a?4Asn while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 6 b?K-)kL { =CS$c? nStartPos += fileAccessI.write(b,0,nRead); *f{4_ts //if(nThreadID == 1) ,KF>@3f // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6 OvH"/X4 } zlTLp-^Y rg#/kd<?[V b"`fS`@/MW Utility.log("Thread " + nThreadID + " is over!"); H@ty'z? bDownOver = true; M?hPlo"_ //nPos = fileAccessI.write (b,0,nRead); K`ygW|?gt } LWSy"Cs* catch(Exception e){e.printStackTrace ();} 3m2y<l< } dl |$pm@x } h.Sbds s|Vs#o.P) .i*ja* //打印回应的头信息 NS+uiy public void logResponseHead(HttpURLConnection con) -em3 #V { q$IU!I4 for(int i=1;;i++) M195[] { TaKHr$h String header=con.getHeaderFieldKey(i); .L^;aL if(header!=null) ^h#A7 g //responseHeaders.put(header,httpConnection.getHeaderField(header)); +iQ~ Y2Gh Utility.log(header+" : "+con.getHeaderField(header)); K;s` else ^L
Xr4 break; D62'bFB^ } N"Y%*BkH } 6& hiW]Adm 7Wiwnv_" O8rd*+ public void splitterStop() |Xd&aQ { sk0/3X*Q% bStop = true; vp d!|/ } gu'+kw 7)Tix7:9S; #^ .G^d(= } `ZP[-: ` t*6C?zEAU f^5sJ0;% /* Y2N$&]O{ **FileAccess.java 9c1q:>| *//文件访问(定位,写) #-R]HLW* package NetFox; N "eK9> import java.io.*; vt5>>rl
!y!s/i&P% 5"q{b1 public class FileAccessI implements Serializable{ !VrBoU4<d !}1l8Y //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 y] Cx[ RandomAccessFile oSavedFile; ]#q$i[Y long nPos; Aqg$q* Y ?9 `T_, a<+Rw{ public FileAccessI() throws IOException q?L*Luu+ { wJvk this("",0); G`;mSq6i } F%{z EANm U^-J_yq wjOqCF" public FileAccessI(String sName,long nPos) throws IOException ;[Esop { q zo)\, oSavedFile = new RandomAccessFile(sName,"rw"); ?q5HAIZ` this.nPos = nPos; JKCV>k oSavedFile.seek(nPos); HDu|KW$o1 } mcQ\"9 ;pY Th~pju (ueH@A"9; public synchronized int write(byte[] b,int nStart,int nLen) }JT&lyO< b { *t={9h int n = -1; >Wpd q( o try{ R9+f^o`W oSavedFile.write(b,nStart,nLen); Ag1nxV1M$ n = nLen; W^3'9nYU } W$Aypy
catch(IOException e) qrt2uE{K { bs?4|#[K e.printStackTrace (); *S Z]xrs } C{ Z*5) (hv}K*c{ R/^;,. return n; o9v9
bL+X } ~i}/ =)]RD%Oq 91#n Aj% } #e9XU:9@g T(~^X-k BTE&7/i21 /* a<V
Mh79* **SiteInfoBean.java HI)U6.' */ i l%9j package NetFox; _b=})** x6=tS
/J,&G:
Er public class SiteInfoBean { z]O>`50Q 2Ju,P_<dt CR|>?9V private String sSiteURL; //Site's URL `R$bx 64 private String sFilePath; //Saved File's Path {Z[kvXf"mZ private String sFileName; //Saved File's Name ):Ekf2 private int nSplitter; //Count of Splited Downloading File s: MJ{r(s $5>x)jr:w+ ,z0E2 public SiteInfoBean() +6Vu]96=KC {//nSplitter的缺省值为5 F0Z cV>j} //default value of nSplitter is 5 mOYXd,xd this("","","",5); 9x9E+DG#( } +Pn`AV1 k_%maJkXp 6AmFl< public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) HMR!XF&JjC { 8ZO~=e sSiteURL= sURL; Gv\fF;,R sFilePath = sPath; nON"+c* sFileName = sName; v/wR)9 this.nSplitter = nSpiltter; 061 f Ob-k`@_| )v.\4Q4 } ]JI
A\|b6 0j{KZy a3(f\MMxE public String getSSiteURL() y? 65*lUl { /p@0Q[E return sSiteURL; zPb"6%1B } #kQLHi3## c-a;nAR :#W>lq@H public void setSSiteURL(String value) w;^7FuBaC { Aj=c,]2 sSiteURL = value; R~BW=Dz,e } W{;LI
WsZ d _koF-7 f P1fm public String getSFilePath() mDU-;3OqF { qk(u5Z return sFilePath; * (<3 oIRS } 9}Zi_xK&|e E}=F
~3m}
EL public void setSFilePath(String value) 'MIM_m)H { <4Cy U
j sFilePath = value; {pB9T3ry] } v#+tu,)V; 2VS#=i(B^ /ec~^S8X public String getSFileName() N&lKo}hk { \[x4 return sFileName; 9L9mi<, } <i1P ~ q0
8 [x|{VJ(h public void setSFileName(String value) &,`P%a&k { Aaix?
|XN sFileName = value; GpM_Qp } J)Td'iT( )F35WP~ BLhuYuON public int getNSplitter() KHXnB { pG:)u
cj return nSplitter; u@zBE?
g } -^7n+
QX uc;QSVWGy8 9Uh nr]J. public void setNSplitter(int nCount) Y~M H { ]7{-HuQ8>} nSplitter = nCount; n7Ia8?8-l } RpY#_\^hI } _u`W$EG
L tMy@'nj $eBE pN /* 7gQ~"Q **Utility.java I^6zUVH */ Q}jl1dIq package NetFox; ?2b9N ~ [VP~~*b 3^zOG2 public class Utility { %@FTg$ ysiBru[u
D}Lx9cL public Utility() RA+k/2]y! { "$BWP z<mU$< [(N<E/m %B } %fz!'C_4 P1ab2D //线程睡眠 ]Z\.Vx public static void sleep(int nSecond) R#Bdfmldq { ;=6~,k) try{ 3J}bI{3 Thread.sleep(nSecond); up7]Yy;o= } L1k_AC1.M catch(Exception e) <[7.+{qfW { f"5vpU^5* e.printStackTrace (); [nlW}1)46 } QY<2i-A } X^H)2G>e Dl%NVi+n //日志 Pw'3ya8 public static void log(String sMsg) m.p{+_@M& { 8+1tys System.err.println(sMsg); 7>J8\= } #\$R^u]! 5!G}*u. I%whM~M1+ public static void log(int sMsg) 3say&|kJ { JQ8wL _C> System.err.println(sMsg); X}xy
v } d1#;>MiU } ~8Z0{^ :_Y@,CpIEg GKwm %A /* PDo%ob\Ym **TestMethod.java eVDI7W:(Sn */ *eytr#0B- package NetFox; [x5T7= >LwZ"IEV T)]5k3{ public class TestMethod { Pz1pEyuL 2, ` =i [L,Tf_t^Y public TestMethod() ,r{\aW@ { ///xx/weblogic60b2_win.exe /AP@Bhm try{ F"3PP ~ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); oToUpkAI //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); R1FBH:Iu SiteFileFetch fileFetch = new SiteFileFetch(bean); _{6QvD3kg. fileFetch.start(); X/TuiKe } [(Pm\o catch(Exception e){e.printStackTrace ();} @twClk.s (yCFpb #|34(ML } ;z>)&F hX]vZR&R `bffw:;% public static void main(String[] args) =LS?:Mhm { jyf[O - new TestMethod(); Qd 1Q~PBla } ]dc^@}1bN } A\_cGM2 点击下载更多相关资料
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