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/* P{ HYZg **SiteFileFetch.java #Rx|oSc} */ iwS55o package NetFox; TeXt'G=M import java.io.*; /lqVMlz\77 import java.net.*; n,vs(ZL: zc#$hIi DSX.84 public class SiteFileFetch extends Thread { \I[50eh| .QVZ! N_^s;Qj SiteInfoBean siteInfoBean = null; //文件信息Bean ( {}Z
' long[] nStartPos; //开始位置 xG"*w@fs7 long[] nEndPos; //结束位置 RwyRPc_ FileSplitterFetch[] fileSplitterFetch; //子线程对象 l:$i}.C long nFileLength; //文件长度 f tE2@} boolean bFirst = true; //是否第一次取文件 f&ri=VJY\T boolean bStop = false; //停止标志 ;eQOBGX9 File tmpFile; //文件下载的临时信息 (m%A>e
B DataOutputStream output; //输出到文件的输出流 k 3S I2G:jMPy //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 4t e QG public SiteFileFetch(SiteInfoBean bean) throws IOException bWEti}kW { I`-N]sf^ siteInfoBean = bean; '7;b+Vbl# //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath()));
roNRbA] tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); j,@@[{tu if(tmpFile.exists ()) T2/lvvG { +2?=W1` bFirst = false; waRK$/b
( read_nPos(); Z36C7 kw } S#{gCc else |b^+=
" { CYFi_6MFl nStartPos = new long[bean.getNSplitter()]; 5N.-m;s nEndPos = new long[bean.getNSplitter()]; O4lHR6M2 } vn"+x_ i0/RvrLc Pua|Z
x f:hsE } wR]jJbF !]*Cwbh.
u ?=#vp / public void run() o +KDK{MD { pB0p?D)n //获得文件长度 #|R#/Yc@Bv //分割文件 kACgP!~/1 //实例FileSplitterFetch sjIUW$ //启动FileSplitterFetch线程 YggeKN //等待子线程返回 &'KJh+jJ
try{ 4M,Q{G|e if(bFirst) Z(c3GmY { 'ugc=-0pd nFileLength = getFileSize(); 0tb%h[%,M if(nFileLength == -1) {@YY8SKb9 { |f IIfYE System.err.println("File Length is not known!"); t]14bf$*Q } B3C%**~:e else if(nFileLength == -2) /;{E}` { sDXD>upO System.err.println("File is not access!"); vnr{Ekg } 9Q/t+ else qr<RMs { kVeR{i<*( for(int i=0;i<nStartPos.length;i++) jRGslak; { XV %DhR= nStartPos = (long)(i*(nFileLength/nStartPos.length)); 0s'h2={iI } bpgvLZb>s for(int i=0;i<nEndPos.length-1;i++) "kS!rJ[ { s:ZYiZ- nEndPos = nStartPos[i+1]; k3yA*Ec } `WRM7 nEndPos[nEndPos.length-1] = nFileLength; $s.:H4:I } j0`)m R} } ;vuqI5k ,$A'Y hb="J349 //启动子线程 =`pH2SJT fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; z&KrG for(int i=0;i<nStartPos.length;i++) iKM!>Fi { #AO?<L fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 0(|Yy/Yq siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), rHaj~s 4 nStartPos,nEndPos,i); )sZJH9[K Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?DrA@;IB fileSplitterFetch.start(); =8V
9E } \@!"7._= // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hH(w O\s siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Nbvs_>N // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", HE|XDcYO nEndPos = " + nFileLength); KBOp}MEz // fileSplitterFetch[nPos.length-1].start(); !*G%vOa N(Sc!rX +oev NM //等待子线程结束 slTE. //int count = 0; q/#pol //是否结束while循环 J:Idt}@z boolean breakWhile = false; N}gPf
i SUC'o" fvBL? x while(!bStop) f"RS,] { 4..M *U write_nPos(); [JVEKc ym Utility.sleep(500); ORx6r=zg breakWhile = true; qd<-{ Lvd es.0| cNl NJ for(int i=0;i<nStartPos.length;i++) L+.&e4f'oj { E< Y!BT[X if(!fileSplitterFetch.bDownOver) q>rDxmP< { 6m%#cP
(6K breakWhile = false; YN}vAFR` break; 38#Zlcf } 8_Nyy/K#F } \@B'f if(breakWhile) G_]zymXQ break; o]M1$)>b+ lc[)O3,,B (L<qJd1Q //count++; G
_-JR //if(count>4) hN^,'O // siteStop(); .]w=+~h } K1$
F}~qTF;H vzFo" System.err.println("文件下载结束!"); 0,whTnH| } dym K @ catch(Exception e){e.printStackTrace ();} }0V aZ<j } 4w5);x. #w@V!o Qo~|[]GE //获得文件长度 J'C9}7G public long getFileSize() =}g-N)^ { mg]t)+ PQ int nFileLength = -1; !nU|3S[b
try{ 4;*jE ( URL url = new URL(siteInfoBean.getSSiteURL()); HtV8=.^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); N 9W,p2 httpConnection.setRequestProperty("User-Agent","NetFox"); rS8}(lf ykYef m+Kl
int responseCode=httpConnection.getResponseCode(); YeS5%?Fk if(responseCode>=400) s}F.D^^G { 1ixBwnp? processErrorCode(responseCode); wxo*\WLe return -2; //-2 represent access is error MY}/h@ } A{p_I< Du #>y! Cto>~pV String sHeader; c] - +ib&6IU (q@%eor&} for(int i=1;;i++) hg2Ywzfm- { 2]]}Xvx4# //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); h~lps?.#b //Utility.log(in.readLine()); ot0g@q[3 sHeader=httpConnection.getHeaderFieldKey(i); GkpYf~\Q if(sHeader!=null) n^|SN9_r { K0~=9/ if(sHeader.equals("Content-Length")) ^8KxU { SQ&}18Z~ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); iURSYR break; [y~kF?a } d uP0US } NvC @ else "U!Vdt2vp break; =~ k}XB } #(QS5J&Qq } 0t[ 1#!=k catch(IOException e){e.printStackTrace ();} pgQ^w0BQV catch(Exception e){e.printStackTrace ();} ^5Zka!'X2Z @/,0()* dL 7g$*K0m` Utility.log(nFileLength); Y-lwS-Ii x_ t$* ^WF_IH& return nFileLength; W_6gV } %l,CJd5 7K ~)7U Hy5 6@jW+E //保存下载信息(文件指针位置) 6L rI,d private void write_nPos() _Wq;bKG { 31\mF\{V try{ Zv2]X- output = new DataOutputStream(new FileOutputStream(tmpFile)); G5%k.IRz output.writeInt(nStartPos.length); _0BQnzC= for(int i=0;i<nStartPos.length;i++) jn`5{ ]D { #"8'y // output.writeLong(nPos); z%BX^b$Hj output.writeLong(fileSplitterFetch.nStartPos); E@EP9X
> output.writeLong(fileSplitterFetch.nEndPos); &c} 2[= } M3Qi]jO98 output.close(); I@5$ <SN } YC$>D?FW catch(IOException e){e.printStackTrace ();} K4-_a{)/ catch(Exception e){e.printStackTrace ();} 0"Euf41 } cc3/XBo w/:ibG@ e,Z[Nox //读取保存的下载信息(文件指针位置) zJ$U5r/u private void read_nPos() <,Pl31g^ { l[i1,4 try{ [+8*}03 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); K:A:3~I!NW int nCount = input.readInt(); 9kwiG7V1 nStartPos = new long[nCount]; Nv|0Z'M nEndPos = new long[nCount]; f|ERZN`uB for(int i=0;i<nStartPos.length;i++) \GV'{W+o2 { %mIdQQ, nStartPos = input.readLong(); u@P1`E1Q nEndPos = input.readLong(); OsW*@v( } 8
&v)Vi- input.close(); &O#1*y
Z } RP^vx`9h catch(IOException e){e.printStackTrace ();} QyY<Zi;6 catch(Exception e){e.printStackTrace ();} sgnc$x" } @^J>. g sy-#Eo#3 )c?nh3D private void processErrorCode(int nErrorCode) 4;@L#Pzt { Z
+O<IF% System.err.println("Error Code : " + nErrorCode); <EdNF&S- } w+Gav4 2R
^6L@fw _0ZU I^# //停止文件下载 k)[c!\a[i public void siteStop() R<vbhB/lU { GHo
mk##0E bStop = true; u/NcX for(int i=0;i<nStartPos.length;i++) B~M6l7^? fileSplitterFetch.splitterStop(); =p7id5" XL9-N?(@ fQwLx
} \/C5L:|p_ } wCV~9JTJ! //负责部分文件的抓取 u?rX:KkS **FileSplitterFetch.java fdHFSnQ g */ ~]`U)Aw package NetFox; d(:I~m kZ]pV=\Y* ;@:-T/= import java.io.*; jP0TyhM import java.net.*; eKLE^`2*@ l_8ibLyo Ck>]+rl public class FileSplitterFetch extends Thread { #3{{[i(;i 4#.Q|vyl]" mg>wv[ 7 String sURL; //File URL P!IXcPKW53 long nStartPos; //File Snippet Start Position 2aX{r/Lc long nEndPos; //File Snippet End Position )=bW\=[8 int nThreadID; //Thread's ID
(^B=> boolean bDownOver = false; //Downing is over ?>I boolean bStop = false; //Stop identical V6h8+|hK FileAccessI fileAccessI = null; //File Access interface ks
%arm& r:Q=6j, 3.g 4X?=zd public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException $dWYu"2CD { ~;YkR'q0_ this.sURL = sURL; kBnb9'.A1 this.nStartPos = nStart; Rlm28 this.nEndPos = nEnd; 8H T3C\$s nThreadID = id; +F%tBUY{< fileAccessI = new FileAccessI(sName,nStartPos);//定位 Ct zWdo. } .JJ50p "zz b`T[8 ~=t9-AF- public void run() hs:iyr]@9 { ie>mOsz while(nStartPos < nEndPos && !bStop) 8J- ?bo { Z6Z/Y()4Tl xP;>p|
M FFe{=H,= try{ @?;)x&<8?3 URL url = new URL(sURL); JoZzX{eu" HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); :Bu)cy#/[ httpConnection.setRequestProperty("User-Agent","NetFox"); _meW9)B String sProperty = "bytes="+nStartPos+"-"; :7 JP(j2 httpConnection.setRequestProperty("RANGE",sProperty); rx@i.+ Utility.log(sProperty); !,rF(pz D~|q^Ms,% 5*Qzw[[= InputStream input = httpConnection.getInputStream(); Y7 K2@257 //logResponseHead(httpConnection); k7L4~W rz2,42H] jGo\_O<of byte[] b = new byte[1024]; qn,fx6v4 int nRead; +x/vZXtOK while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) :#{0yno)H { Iz;^D! nStartPos += fileAccessI.write(b,0,nRead); Q`Q"p //if(nThreadID == 1) `*`ZgTV // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); #l.s>B4 } OECVExb@eH =vriraV" A:(qF.Tm Utility.log("Thread " + nThreadID + " is over!"); QFoCi& bDownOver = true; X?JtEQ~> //nPos = fileAccessI.write (b,0,nRead); p,uM)LD
} Q`4Ia<5B catch(Exception e){e.printStackTrace ();} T&bB8tQk } a<>cbP } l<ZHS'-;8 2R^Eea s8qpK; O //打印回应的头信息 Fpwhyls public void logResponseHead(HttpURLConnection con) rY1jC\ { @xso{$ z?j for(int i=1;;i++) eb6y-TwY { {ot6ssT=D String header=con.getHeaderFieldKey(i); ~?)y'? if(header!=null) AMO{ee7Po //responseHeaders.put(header,httpConnection.getHeaderField(header)); L|1~'Fz#w Utility.log(header+" : "+con.getHeaderField(header)); tL1\q Qg else [Ls%nz| break; /TIt-c } ,_D@ggL- } )7Qp9Fxo /11CC \ q|IU+r:! 3 public void splitterStop() (?lT @RY/ { yJlRW!@&: bStop = true; +^J;ic } '"ze Im~ 5B8fz;l= B jqTK7b } ">S1,rhgS w\V<6_[vv. aSJD'u4w.a /* kho0@o+'^ **FileAccess.java "gDk?w *//文件访问(定位,写) JE*?O*&|Q package NetFox; :<0lC j import java.io.*; wyAh%'V p6)6Gcx oYJ<.Yxeb public class FileAccessI implements Serializable{ cf*~Gx_l JS<w43/j //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Ad>@8^ RandomAccessFile oSavedFile; $?VYHkX long nPos; qLKL*m QA)"3g
nrXKS&6 public FileAccessI() throws IOException "GJ.`Hj { YB^m!A),I[ this("",0); ~XvMiWuo } "-AFWWKtx 1|>bG#| f9IqcCSW public FileAccessI(String sName,long nPos) throws IOException V>UlL&V { MU:v& sk oSavedFile = new RandomAccessFile(sName,"rw"); ;vWJOvM2 this.nPos = nPos; { ~(XO@;b oSavedFile.seek(nPos); -rHqU| } fZJM'+J@A 77 Z:!J| #T`1Z"h< public synchronized int write(byte[] b,int nStart,int nLen) I?%#`Rvu { iU=:YPE+. int n = -1; u09D`QPP] try{ +>c%I&h}` oSavedFile.write(b,nStart,nLen); +#A~O4%t n = nLen; Q7UQwAN' } beV+3HqB8 catch(IOException e) DiZv sc { #!_ViG )2^ e.printStackTrace (); ="Azg8W } <A`SC;k\u r?pFc3~N Z-" NLwt[ return n; iuM ,aF } 2n#H%&^?a }/IP\1bG (hRg0Z= } 1 .o0" sqRvnCD! ,ZO?D|M1 /* XB:E<I'q!3 **SiteInfoBean.java hQvI} */ V{\1qg{ package NetFox; T$;BZ=_ ygK,t*T20 W&3,XFnI_ public class SiteInfoBean { 1:u~T@;" ` XXD4T9Wy J'L6^-gV private String sSiteURL; //Site's URL SaRn>n\ private String sFilePath; //Saved File's Path +HD2]~{EkL private String sFileName; //Saved File's Name U><$p{) private int nSplitter; //Count of Splited Downloading File gzlRK^5 "-G7eGQ $H/: -v public SiteInfoBean() Tl?jq] {//nSplitter的缺省值为5 ,.;{J|4P //default value of nSplitter is 5 O
>@Q>Z8W? this("","","",5); :SZi4:4-J8 } i.FdZN{ xsvJjs;= V,?])=Ax public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) DV*e.Y> { GK3cQw sSiteURL= sURL; :01B)~^ sFilePath = sPath; @Yw42`>!s sFileName = sName; e{^lD.E this.nSplitter = nSpiltter; _5OxESE bJeF1LjS Sg\+al7 } SxkY ;^-U &7{yk$]* zIr-Rx'dL^ public String getSSiteURL() &F'n
>QT9q { M`)3(|4 return sSiteURL; EQ"+G[j~x } Z8f?uF zP|^@Homk r*FAUb`bG public void setSSiteURL(String value) \(zUI { X'xnJtk sSiteURL = value; Q Vl"l'e8 } _! ?a9 iWkC:fQz (SA^>r public String getSFilePath() ],'"iVh { dMI G2log return sFilePath; ~Ds3-#mMy } {qs>yQ6a:- 3aJYl3:0B }5Km \OI public void setSFilePath(String value) @jZ1WHS_a { f'Oj01[ sFilePath = value; \GK]6VW } ZJ/K MW Nkn2\w #TB
3|= public String getSFileName() /#?!9c { pTH5-l_f] return sFileName; :g+wv}z } MaF4lFmS CWb*bw0 /HdjPxH public void setSFileName(String value) ^#4<~zU { on1B~?*D sFileName = value; 3A.lS+P1 } :+8qtIytKX {?r5~T`2 Sj viH public int getNSplitter() uu/2C \n} { Ve xxdg return nSplitter; j&q%@%Gm } | _nBiHjNn TrQUhmS/! ~CHVU3 public void setNSplitter(int nCount) *De'4r 2 { BP1<:T'.q` nSplitter = nCount; &@w0c>Y } t"vkd } w=5<mw mgb+HNH%q\ h:KEhj\d? /* !bCaDTz **Utility.java h&rZR`g */ Q9&H/]"v package NetFox; fGWXUJ ~{pds "kjSg7m*: public class Utility { s|k&@jH) TK0W=&6#A OMBH[_ public Utility() x
}]"jj2x { D J7U6{KLq wVc^l bKEiS8x } 9|m:2["|? jVqpokWH //线程睡眠 K{ntl-D&y public static void sleep(int nSecond) wEQZ9?\ { msQ?V&+< try{ LG??Q+`l Thread.sleep(nSecond); bL5u;iy) } ?.Ip(g catch(Exception e) %l!-rXp { ZVrZkd` e.printStackTrace (); >Sb3]$$ } s@6Jz\<E } "/%o'Fq 2WE01D9O //日志 1*.*\4xo public static void log(String sMsg) o/&
IT(v { Lb{.} System.err.println(sMsg); m ^w{:\p } w:mm@8N ZKM@U?PK #$}A$ sm public static void log(int sMsg) 5=8t<v1Bn { yR"mRy1 System.err.println(sMsg); lNTbd"}$: } 5qFHy[IA } ZH~Wn#Wp DcE4r>8B |7${E^u /* #aiI]' **TestMethod.java X8wtdd]64 */ KN>h*eze package NetFox; D
,[yx=' /QQjb4S} RiFUa
$ public class TestMethod { T`9nY! 6h0}ZM %pqB/ public TestMethod() Zay%QNsb { ///xx/weblogic60b2_win.exe $EzWUt try{ {d.K)8\ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ls~9qkAyLx //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); #)3 B SiteFileFetch fileFetch = new SiteFileFetch(bean); (6b0rqPF fileFetch.start(); /U`p|M; } }daU/ catch(Exception e){e.printStackTrace ();} Wfy+9"-;s l=x(
/!qP=ngw9 } }(,{^".[} P'DcNMdw mu5r4W47 public static void main(String[] args) lS#^v#uS { =^ \?{oV new TestMethod(); /_YTOSZjm } y|zIuI-p } >]o>iOz;] 点击下载更多相关资料
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