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/* Ly@U\%. **SiteFileFetch.java k
i~Raa/e */ uOy\{5s8 package NetFox; :/I={)5 import java.io.*; "a 2H8x import java.net.*; Zb5T90s% p]atH<^;K 1aXIhk4 public class SiteFileFetch extends Thread { DR#3njjEC
M}_M_ 0nF>zOmc SiteInfoBean siteInfoBean = null; //文件信息Bean )AZ`R8-A long[] nStartPos; //开始位置 Ip1QVND long[] nEndPos; //结束位置 2}W6{T' FileSplitterFetch[] fileSplitterFetch; //子线程对象 0O@[on;Bd long nFileLength; //文件长度 CJ37:w{%*Y boolean bFirst = true; //是否第一次取文件 n=<q3}1Jej boolean bStop = false; //停止标志 ,58kjTM File tmpFile; //文件下载的临时信息 'dd<<E DataOutputStream output; //输出到文件的输出流 &k {t0> 5k!(#@a_T //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) /0'fcjOaQ public SiteFileFetch(SiteInfoBean bean) throws IOException U^WQWa { < :S?t2C siteInfoBean = bean; 9
u6
g //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); *;~{_Disz tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); lW@:q04Z$ if(tmpFile.exists ()) oQE_?">w { |G5=>W bFirst = false; Xl gz.j7XR read_nPos(); vM$#m1L? } LQuYCfj| else o>!~*b';g, { 9 ;! uV>-H nStartPos = new long[bean.getNSplitter()]; pD)/-Dgdm nEndPos = new long[bean.getNSplitter()]; W"DxIy } s`dkEaS w^vK7Z
1$ 0o\=0bH&s *8(t y%5F0 } a-o
hS=W P7^TRrMF iz$v8;w public void run() `^@g2c+d { 6 I>xd //获得文件长度 h_}BmJ h_ //分割文件 ?7uStqa //实例FileSplitterFetch YV>VA<c //启动FileSplitterFetch线程 ce-m)o/ //等待子线程返回 !3gpiQH{ try{ iKCTYXN1( if(bFirst) .,(uoK{ { c"_H%x<[ nFileLength = getFileSize(); +RKE|*y if(nFileLength == -1) o
Q!g!xz { 7cQHRM+1 System.err.println("File Length is not known!"); R&d_WB4w } }@t'rK[ else if(nFileLength == -2) N
NXwT0t { pu
m9x)y1 System.err.println("File is not access!"); s`{#[&[ } +BTNm66Z else )l81R { pR^Y|NG! for(int i=0;i<nStartPos.length;i++) Xj&~N;Ysb { ;#Bh_f nStartPos = (long)(i*(nFileLength/nStartPos.length)); 4w/t$lR } ?F_;~ for(int i=0;i<nEndPos.length-1;i++) /R+]}Lt~%* { Aghj) V nEndPos = nStartPos[i+1]; f1,$<Y|qU } _yXeX nEndPos[nEndPos.length-1] = nFileLength; 71,0v`Z< } smQpIB; } jL[Is2<@
;Bc<u[G 9h{:!
//启动子线程 t+Q|l&|0 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; r
z>zdj5} for(int i=0;i<nStartPos.length;i++) Y+5A2Z)f[ { pOe` *2[ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), )}g4Rvr siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), `cTsS nStartPos,nEndPos,i); A0 w `o Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Z[A|SyZp fileSplitterFetch.start(); M#gGD- } F(kRAe; // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 26klW:2* siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); W YqL // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ,,-[P*@ nEndPos = " + nFileLength); 28L'7 // fileSplitterFetch[nPos.length-1].start(); 1Z{p[\k %emPSBf@ 4m~stDlN //等待子线程结束 bT6)(lm //int count = 0; )*AA9 //是否结束while循环 x;b+gIz* boolean breakWhile = false; m">
=QP 7XI4=O};&% X9BBnZ while(!bStop) U=<.P;+f9 { -W"0,.Dvg write_nPos(); "a_D]D(d5 Utility.sleep(500); i1H80m s breakWhile = true; F/,<dNJ N[D\@o :{= 'TMJ7 for(int i=0;i<nStartPos.length;i++) V5^b6$R@ { OU964vv if(!fileSplitterFetch.bDownOver) >"My\o { 2ZIY{lBe breakWhile = false; jm!C^5! break; af5`ktx } /xbF1@XtL } ;.[$ if(breakWhile)
*Zo o break; |~vQ0D
GZ>% &^E ~m=%a //count++; }u*@b10 //if(count>4) >Ti2E+}[M // siteStop(); 0Y`tj } Pj5#G0i% Pw0 KQUs hb\Y )HSp/ System.err.println("文件下载结束!"); g.sV$.T2K } ^XB8A=xi catch(Exception e){e.printStackTrace ();} Zkep7L
} :[rKSA]@ #$^i x V# %spW //获得文件长度 6G})h! public long getFileSize() x;]{ 8#-z { 0\<-R int nFileLength = -1; r4>I?lD try{ 93eqFCF. URL url = new URL(siteInfoBean.getSSiteURL()); L/+J|_J) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ]6[d-$#^ko httpConnection.setRequestProperty("User-Agent","NetFox"); s5
'nWMo 5WN Z7cO ^"#rDP"v int responseCode=httpConnection.getResponseCode(); :NyE d<' if(responseCode>=400) YD.^\E4o { :|mkI#P. processErrorCode(responseCode); :pu{3-n. return -2; //-2 represent access is error %hb5C 4q } RL)3k8pk d*(\'6? "8
mulE, String sHeader; @{a-IW3 _Cs}&Bic_ Oydmq,sVe( for(int i=1;;i++) TmZ[?IL, { 6(^9D_"@ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); w1G.^ //Utility.log(in.readLine()); 1@dx(_ sHeader=httpConnection.getHeaderFieldKey(i); \)]2Uh| if(sHeader!=null) io'Ovhf: { Bx!` UdRn if(sHeader.equals("Content-Length")) ABDUp: { [1MEA; nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); YU,:3{9, break; ?7ZlX?D[ } Y-{BY5E. } Czxrn2p/ else cY]Y8T) break; <~*Ol+/ } j7+t@DqQ } vp9<.*h catch(IOException e){e.printStackTrace ();} _7.y4zQJ catch(Exception e){e.printStackTrace ();} 5hK\YTU LkB!:+v |B GK%ovK Utility.log(nFileLength); oA%[x j'x{j %U k|C8sSH return nFileLength; nGd } B9-[wg#0G ][1u:V/
U ]*U') //保存下载信息(文件指针位置) r,KK%B private void write_nPos() -y.AJ~T { ~{Bi{aK2 try{ [![(h % output = new DataOutputStream(new FileOutputStream(tmpFile)); A\.*+k/B output.writeInt(nStartPos.length); !c($ C for(int i=0;i<nStartPos.length;i++) f~9Y1|6 { $ 3B? // output.writeLong(nPos); ;qK6."b`; output.writeLong(fileSplitterFetch.nStartPos); EQ$9IaY. output.writeLong(fileSplitterFetch.nEndPos); <]^D({` } L:Eb(z/D output.close(); PtOnj)Q } KHN
,SB catch(IOException e){e.printStackTrace ();} }O catch(Exception e){e.printStackTrace ();} ;BVhkWA } PlUjjJU @/FX7O{n: 1z:N$O_v //读取保存的下载信息(文件指针位置) 3~la/$?p0 private void read_nPos() Uroj%xN { f|0QN#$ try{ 4pT|r6!< DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ;#j82 int nCount = input.readInt(); ]l%.X7M9 nStartPos = new long[nCount]; j@!}r|-T nEndPos = new long[nCount]; A,)ELVk1F for(int i=0;i<nStartPos.length;i++) EPRs%(w` { w\*/(E<:
nStartPos = input.readLong(); FJ"9Hs2 nEndPos = input.readLong(); hspg-|R } Am
$L input.close(); F
k;su,]_ } CF_!{X_k} catch(IOException e){e.printStackTrace ();} n#cN[C9 catch(Exception e){e.printStackTrace ();} qT @IY)e } f tDV3If k;7.qhe: mO.U)tL[ private void processErrorCode(int nErrorCode) I9>*Yy5RNS {
q+~CA[H5K System.err.println("Error Code : " + nErrorCode); {Z.@-Tl_ }
*xP:7K ^ni_%`Ag n.RhA-O //停止文件下载 hh&y2#Io public void siteStop() 5zOSb$; { B,,d~\ bStop = true; >,Z{wxzJ for(int i=0;i<nStartPos.length;i++) Ao$z)<d' fileSplitterFetch.splitterStop(); DA~ELje^j Q;nr=f7Ys K/cK6Yr } nUHVPuQ/'T } w-Fk&dC69 //负责部分文件的抓取 GR
`ncI$z **FileSplitterFetch.java 2z3A"HrlA */ f*Js= hvO package NetFox; _9r{W65s ^j}sS!p {m:R v&T import java.io.*; W^Y0>W~ import java.net.*; ;bE6Y]"Rz 3~rc=e cU|jT8Q4H public class FileSplitterFetch extends Thread { =U2n"du a*ymBGF x$DJ String sURL; //File URL V"iLeC long nStartPos; //File Snippet Start Position *'-^R9dN.S long nEndPos; //File Snippet End Position +to9].O7y int nThreadID; //Thread's ID 8 GN{*Hg boolean bDownOver = false; //Downing is over F9r*ZyNlx boolean bStop = false; //Stop identical vy2aNUmt FileAccessI fileAccessI = null; //File Access interface ZQA
C&: 5&=n m28w4
public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ?Nql7F4 { mC(t;{ this.sURL = sURL; U:hC!t: this.nStartPos = nStart; " SqKS,J this.nEndPos = nEnd; 7!wnx. nThreadID = id; .
*xq = fileAccessI = new FileAccessI(sName,nStartPos);//定位 0u2uYiE-l } yVzg<%CR^ :G/]rDtd 7g+ ] public void run() #SNI
dc>9\ { vyGLn while(nStartPos < nEndPos && !bStop) *PU,Rc()6 { uiA:(2AQ 5T#D5Z<m
RQNi&zX/ try{ 4LJ}>e URL url = new URL(sURL); X{9o8
*V HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /j@ `aG(a httpConnection.setRequestProperty("User-Agent","NetFox"); !5t 3Y String sProperty = "bytes="+nStartPos+"-"; 4{t$M} ?N httpConnection.setRequestProperty("RANGE",sProperty); 2tm-:CPG Utility.log(sProperty); tuV?:g? #!# X3j Gi4dgMVei InputStream input = httpConnection.getInputStream(); Wb4{*~ //logResponseHead(httpConnection); 5>Yd\(`K gi@ji-10 o;_bs~}y byte[] b = new byte[1024]; N~_jiVD> int nRead; Cbs4`D, while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ?^4sE-C6 { IkNt!
2s_ nStartPos += fileAccessI.write(b,0,nRead); uA`PZ| //if(nThreadID == 1) ER1mA:8>E // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Q.dy
$`\ } N==_'`O1Q0 ^ZWFj?`\UV V_622~Tc/[ Utility.log("Thread " + nThreadID + " is over!"); dU3>h[q bDownOver = true; 8;&S9'ci //nPos = fileAccessI.write (b,0,nRead); _rd j,F8 } 0(9@GIT catch(Exception e){e.printStackTrace ();} Am0C|(#Xm } q*TKs#3 } Ab<Ok\e5 [j U lILtxVBO2o //打印回应的头信息 F>(#Af9 public void logResponseHead(HttpURLConnection con) BG0Mj2 { v/.h%6n? for(int i=1;;i++) &})d%*n { U*"cf>dB( String header=con.getHeaderFieldKey(i);
vD9D:vK if(header!=null) 05I39/T% //responseHeaders.put(header,httpConnection.getHeaderField(header)); A=]F_ Utility.log(header+" : "+con.getHeaderField(header)); 810<1NP
else 3N0X?* (x| break; E?4@C"Na } Mr,y| } <;E[)tv m{dyVE -
zw{<+; public void splitterStop() Cf=q_\0|W { TM}'XZ& bStop = true; ?iEXFYJG } dN/ "1%9) l~!fQ$~ C!k9 JAa$Z } yZ)aKwj%U b\j&!_
L(2P|{C /* VN-#R=D **FileAccess.java aevG<|qP *//文件访问(定位,写) 3]OP9!\6 package NetFox; bNpIC/#0K import java.io.*; 'L|GClc6) 'S4EKV] p6y0W`U public class FileAccessI implements Serializable{ ])j|<W/ \M"^Oe{Dy? //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 X>Xp&o RandomAccessFile oSavedFile;
QXxLe* long nPos; jvc?hUcLKT '}pgUh_ '
ra B public FileAccessI() throws IOException ; (0(8G { ^HlLj# this("",0); %*6oUb } 6SBvn% p@7i=hyt`p Xtu`5p_Qv public FileAccessI(String sName,long nPos) throws IOException ^A"lkV7 { KWhM oSavedFile = new RandomAccessFile(sName,"rw"); u ?G\b{$m this.nPos = nPos; 'W?v.W & oSavedFile.seek(nPos); JQ/t, v$G } [[0bhmG) Q^MXiEO+ "^
6lvZP( public synchronized int write(byte[] b,int nStart,int nLen) Ce5w0&VlS { hi3sOK*r;< int n = -1; O? Gl4_y try{ <[y$D=n oSavedFile.write(b,nStart,nLen); $]H= n = nLen; hLytKPgt } :ONuWNY
N catch(IOException e) bxhg*A { 2^ ,H_PS e.printStackTrace (); <{NYD. } h-b5 h/X5w4 )}Rfa}MD return n; ,P@/=I5 } $D/bU lFx TI[UX16Tz1 7moElh v } .qIy7_^ 6_%]\37_Z 2l)9Lz=;L /*
7edPH3 **SiteInfoBean.java G_^iR- */ ^YG7dd_ package NetFox; 5&?KW)6 Rz (3N"oE.b] .A*VLF*m public class SiteInfoBean { ia^%Wg7 5qd_>UHp XYb^Cs; private String sSiteURL; //Site's URL KZrMf77= private String sFilePath; //Saved File's Path iF [?uF private String sFileName; //Saved File's Name 4z9#M;qT private int nSplitter; //Count of Splited Downloading File c:llOHA =CjNtD2] z;y^t4
^9 public SiteInfoBean() YXX36 {//nSplitter的缺省值为5 J+71FP`ZH //default value of nSplitter is 5 &SjHrOG? this("","","",5); .|-l+ } S$jV|xKB <}EV*`w4 B?;' lDz* public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) -Wlp=#9 { ]> )u+| sSiteURL= sURL; C(V[wvL sFilePath = sPath; qY$*#*Q sFileName = sName; z/Ns5 this.nSplitter = nSpiltter; M[YTk=IM# QE45!Zg *2,e=tY> } ^"O{o8l>2 (# 6<k =% q?Cr public String getSSiteURL() 11)/] ?/j { %NT`C9][ return sSiteURL; 4d^
\l! } K\IYx|Hm a VqK%^ 8_a$kJJ2 public void setSSiteURL(String value) AV:Xg4UJv { %@}o'=[ sSiteURL = value; GOy=p3mQ } *xE"8pN/ c=A(o 9Fy\t{ks public String getSFilePath()
""1#bs{n { -?< Ww{ return sFilePath; hWD ! } 1R=)17'O TL},Unq PIZ
C;K4| public void setSFilePath(String value) &1z)fD2 { oA4D\rn8" sFilePath = value; $!YKZ0)B'0 } 0'?V|V=v vKNt$]pm= q2x|%HRF public String getSFileName()
4%g6_KB { P%zH>K return sFileName; {&2$[g=[ ^ } =X-^YG3x vk
@%R 1. #
|QX public void setSFileName(String value) 8tb6 gZz { yicO!:bM sFileName = value; )Y3EQxXa } ([:]T$0 # t"<s} ~ I
jZ]_*^! public int getNSplitter() $_Y/'IN`k { -1qZqU$h return nSplitter; qqnclqkw& } hi!L\yi m7$8k@r A2m_q>>
! public void setNSplitter(int nCount) ^"3\iA: { .z=U= _e nSplitter = nCount; weNzYMf% } "pt+Fe|@c; } Dt.0YKF 16"#i 6!P`XTTE /* yiiyqL*E **Utility.java Ne3R.g9;Z */ Lltc4Mzw package NetFox; A0G)imsW:_ t?gJNOV a%Uw;6|{ public class Utility { 41u*w2j 1hl]W+9 B\\6# public Utility() !Citzor { Ls&+XlrX8 JkZ50L 25UYOK}! } _eGT2,D5r R)ERxz# //线程睡眠 w{pUUo:< public static void sleep(int nSecond) <lUOJV{&\ { _`H.h6h try{ >DHp*$y Thread.sleep(nSecond); dXmV@ Noo } ))!Bg?t- catch(Exception e) #Mh{<gk%ax { Rj^7#,993 e.printStackTrace (); t)` p@]j } m9Ax\lf } 7_-w_"X 0axxQ!Ivx //日志 q# MM public static void log(String sMsg) !lAD
q|$ { gw"~RV0 System.err.println(sMsg); dm6~ } |'tW= "NDxgJ%J35 X 7=fX~s public static void log(int sMsg) cB#nsu> { 'Y.Vn P&H System.err.println(sMsg); []|;qHhC~( } syv$XeG=} } x[QZ@rGIW 9M_(He
- Z`Pd2VRp /* SyO79e*t **TestMethod.java h{k_6ym */ h4/X
0@l` package NetFox; tAjx\7IX b.b@bq$1 2jl)mL public class TestMethod { CswE in<}fAro6 yPV'pT) public TestMethod() P-CB;\ { ///xx/weblogic60b2_win.exe '_dzcN,z try{ K$H
<}e3 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); piOXo=9H. //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); m
41t(i SiteFileFetch fileFetch = new SiteFileFetch(bean); p~2UUmV fileFetch.start(); ;#TaZN } l?/Y catch(Exception e){e.printStackTrace ();} 6 "U8V?E -I":Z2.fR C9qJP^F } 3NIUW!gr +R6a}d/K Tr& }$kird public static void main(String[] args) ,LZX@'5 { =p@8z
/u new TestMethod(); ;Wc4qJ.@ } (vc|7DX M } iEIg: 点击下载更多相关资料
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