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/* k FD;i **SiteFileFetch.java q`a'gJx#y */ 1#2 I package NetFox; MUc$j& import java.io.*; @ioJ]$o7 import java.net.*; E_wCN&`[ [ /b2=> g2ixx+`?|: public class SiteFileFetch extends Thread { lU\[aNs hH3RP{'= c_pr SiteInfoBean siteInfoBean = null; //文件信息Bean UHkMn long[] nStartPos; //开始位置 N!=v4f long[] nEndPos; //结束位置 gO- _ FileSplitterFetch[] fileSplitterFetch; //子线程对象 pa3{8x{9m long nFileLength; //文件长度 OLGE !&!> boolean bFirst = true; //是否第一次取文件 7U"g3a)= boolean bStop = false; //停止标志 itP,\k7>d File tmpFile; //文件下载的临时信息 =BAr .m+" DataOutputStream output; //输出到文件的输出流 _8J.fT$${ sb*G!8j //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) $GcqBg-Hi public SiteFileFetch(SiteInfoBean bean) throws IOException ]p GL`ge5 { 6l
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siteInfoBean = bean; I6av6t} //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); p)-^;=<B3 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); /Iokf@5 if(tmpFile.exists ()) #q$HQ&k { ()?(I?II bFirst = false; O
_ gGf read_nPos(); lgy<?LI\ } !i}w~U< else tSUEZ62EY { Y\P8v nStartPos = new long[bean.getNSplitter()]; I;(L%TT ` nEndPos = new long[bean.getNSplitter()]; 7Q9 w?y~c } "+nRGEs6 cwlRQzQ( 4e7-0}0 s
5Qcl;} } ksUcx4;a@F -d/
=5yxL Hzz %3}E public void run() T3<4B!UB& { '<)n8{3Q5w //获得文件长度 .2t4tb(SUw //分割文件 AV]2euyn //实例FileSplitterFetch my1@41
H //启动FileSplitterFetch线程 l|[N42+ //等待子线程返回 *:7rdzn try{ v!-pSa)3 if(bFirst) J]'zIOQ { ^uc=f2=>, nFileLength = getFileSize(); {}n^cq if(nFileLength == -1) SKN`2[ahD { u
c)eil System.err.println("File Length is not known!"); Dx?,=~W9 } JXQO~zj else if(nFileLength == -2) fTec { 9W5lSX#^; System.err.println("File is not access!"); *N<]Xy@ } ,ZNq,$j else V f&zL
Sgr { "HIRTE;& for(int i=0;i<nStartPos.length;i++) s ll\g { PFjL1=7I nStartPos = (long)(i*(nFileLength/nStartPos.length)); 9$w.9`Py } qe#tj/aZ for(int i=0;i<nEndPos.length-1;i++) 0[(8 { ? OM!+O nEndPos = nStartPos[i+1]; 1CZgb } T7%S
#0,p nEndPos[nEndPos.length-1] = nFileLength; 6d}lw6L } /{_:{G!Q0 } V}CG:9; cuITY^6 _TZRVa_ //启动子线程 h438` fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; (?c"$|^J for(int i=0;i<nStartPos.length;i++) FVKTbvYn { 7n<{tM fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(),
UI0VtR] siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), +O{*M9B nStartPos,nEndPos,i); Zu[su>\ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); _V6ukd"B~ fileSplitterFetch.start(); b8UO,fY q } #c!lS<z // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Lk8ek}o' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); $6 f3F?y7 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", cm+Es6; nEndPos = " + nFileLength); TD0
B% // fileSplitterFetch[nPos.length-1].start(); Wac&b XpHrt XD va@Lz&sAE% //等待子线程结束 k4J+J.| //int count = 0; r#a=@ //是否结束while循环 oG\Vxg* boolean breakWhile = false; 2[W&s& a;+9mDXx: lL3U8}vn while(!bStop) +r2-S~f3N { Jnov<+ write_nPos(); d$!RZHo10V Utility.sleep(500); V 5mTP' breakWhile = true; g) jYFfGfH V)25$aKW7 }Sv:`9= for(int i=0;i<nStartPos.length;i++) Y$_B1_ { wc4=VC"y if(!fileSplitterFetch.bDownOver) 0GeTSFj { WOap+ breakWhile = false; GD$l||8 break; )y$(AJx$ } 46h<,na?, } qX{+oy5 if(breakWhile) li.;IWb0+) break; m{HS0l' (!WD1w xb8!B //count++; kffcm/ //if(count>4) ~]2K^bh8& // siteStop(); ~9@UjQ^)F } kxv1Hn"`{E .ioEIs g xy;;zOh` System.err.println("文件下载结束!"); R\[e!g*I } sPIn|d catch(Exception e){e.printStackTrace ();} FZnw0tMq } 3!]rmZ-W xA*<0O\V > ~O.@| //获得文件长度 Gd85kY@w7 public long getFileSize() JWxwJex { ?Ir:g=RP* int nFileLength = -1; ym1Y4, try{
&6VnySE? URL url = new URL(siteInfoBean.getSSiteURL()); P&Vv/D HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7%M_'P4 V httpConnection.setRequestProperty("User-Agent","NetFox"); wibNQ`4k Q$"D]!G FYQS)s int responseCode=httpConnection.getResponseCode(); ;2QP7PrSY if(responseCode>=400) T>W,'H { ]Y&VT7+Z processErrorCode(responseCode); ;$g?T~v7 return -2; //-2 represent access is error @r1_U,0e } 5{,<j\#L 9pfIzs
su3 8quaXVj^a String sHeader; Z%UP6% 8}:nGK|kx h<QY5=SF for(int i=1;;i++) ]`WJOx4 { $6IJP\ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Nh+ H 9 //Utility.log(in.readLine()); 5z)~\;[ - sHeader=httpConnection.getHeaderFieldKey(i); &rR2,3r= if(sHeader!=null) N;%6:I./ { f$QNg0v if(sHeader.equals("Content-Length")) v3>UV8c' { m1A J{cs nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); om>KU$g break; 8&dF } *oix 6 } Aos+dP5h,8 else #/37V2E break; 8u]2xB=K } F!K>K z } lyhiFkO
iH catch(IOException e){e.printStackTrace ();} A=0'Ks catch(Exception e){e.printStackTrace ();} Vxt+]5X BZ^}J!Q'* oXgcc*j Utility.log(nFileLength); veECfR; (/]
J3 tZo} ;|~' return nFileLength; u ^RxD^=L } LDa1X2N #g!.T g' alb.g>LNPP //保存下载信息(文件指针位置) _q^E,P private void write_nPos() `Q,H|hp;k; { <~=Vg try{ a8Wwq?@ output = new DataOutputStream(new FileOutputStream(tmpFile)); xgtR6E^k output.writeInt(nStartPos.length); yB6?`3A: for(int i=0;i<nStartPos.length;i++) -UT}/:a { O#r%>;3* // output.writeLong(nPos); ;dhQN}7 output.writeLong(fileSplitterFetch.nStartPos); sDV Q#}a output.writeLong(fileSplitterFetch.nEndPos); V(*(F7+ } =2x^nW output.close(); 7 X4LJf } 7K:PdF>/ catch(IOException e){e.printStackTrace ();} \73ch catch(Exception e){e.printStackTrace ();} i@J;G` } 9gZ$
P!k{u^$L 5@W j>:w //读取保存的下载信息(文件指针位置) kG*~|ma private void read_nPos() fF kj+ { BDVtSs<7 try{ 8dhUBJ0_ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); =vhm} int nCount = input.readInt(); <a+Z;> nStartPos = new long[nCount]; |Q>IrT nEndPos = new long[nCount]; a'IdYW0 for(int i=0;i<nStartPos.length;i++) >LuYHr { tLmTjX .6 nStartPos = input.readLong(); teVM*- nEndPos = input.readLong(); 4KrL{Z+} } T6k0>[3xf input.close(); 3+bt~J0 } Aiea\jBv catch(IOException e){e.printStackTrace ();} Wm5dk9&x catch(Exception e){e.printStackTrace ();} rVsJ`+L } Af{"pzY KK &?gTa A5w6]: f2 private void processErrorCode(int nErrorCode) gZ1?G-Q { bN@
l?w System.err.println("Error Code : " + nErrorCode); cN9t{.m } u<&m]]* H>@+om .%QXzIa3F //停止文件下载 ~PNub E public void siteStop() W@!S%Y9 { ;9g2?-svw
bStop = true; OZ!^ak for(int i=0;i<nStartPos.length;i++) L8 @1THY fileSplitterFetch.splitterStop(); h)nG)|c "
2Dngw 8Q+36! } -Y;3I00( } *uvQ\. //负责部分文件的抓取 \nqS+on] **FileSplitterFetch.java 0qT%!ku& */ Wo,?+I package NetFox; c[Zje7 @ Z EO WO Om {'1 import java.io.*; dC4'{n|7 import java.net.*; 7"xd1l?zz =mmWl9'mJ 00U> F public class FileSplitterFetch extends Thread { ws^ np xn|(9#1o PnG-h~Y3N String sURL; //File URL N)>ID(}F1 long nStartPos; //File Snippet Start Position 5NLDYi@3 long nEndPos; //File Snippet End Position yR.Ong int nThreadID; //Thread's ID 76` .Y boolean bDownOver = false; //Downing is over ,,|^%Ct'] boolean bStop = false; //Stop identical ei5~& FileAccessI fileAccessI = null; //File Access interface n?K z&^&K} k-""_WJ~^ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException c6/=Gq{. { sUm' this.sURL = sURL; W+1^4::+ this.nStartPos = nStart; uUw5l})%Fi this.nEndPos = nEnd; &
"B=/-( nThreadID = id; Jpo(Wl fileAccessI = new FileAccessI(sName,nStartPos);//定位 D7qOZlX16 } kz7(Z'pw 4I5Y,g{6+ /JU.?M35 public void run() IdxzE_@ { vSLtFMq^( while(nStartPos < nEndPos && !bStop) G<;*SYAb { sFTy(A/ ji,kkipY?w RY*U"G0#w try{ $,fX:x URL url = new URL(sURL); EDs\,f} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _t}WsEQ+P httpConnection.setRequestProperty("User-Agent","NetFox"); 5 + MS^H String sProperty = "bytes="+nStartPos+"-"; $
o#V# httpConnection.setRequestProperty("RANGE",sProperty); b\+`e b8_ Utility.log(sProperty); fLAw12;^ ;P&OX5~V N$:8,9.z InputStream input = httpConnection.getInputStream(); w"&n?L //logResponseHead(httpConnection); eGbGw FN) $0 $]2vvr byte[] b = new byte[1024]; !_Z&a int nRead; "G9xMffW while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ?#Q #u|~ { MR.'t9m2L nStartPos += fileAccessI.write(b,0,nRead); 2T[9f;jM' //if(nThreadID == 1) ps DetP
// Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Xm2z}X(% } S?BG_J6A7 26x[X.C: 1 I",L&S1 Utility.log("Thread " + nThreadID + " is over!"); Ef13Q]9| bDownOver = true; 0Z]!/AsC //nPos = fileAccessI.write (b,0,nRead); Yk Qd
} eO[b1]WLP catch(Exception e){e.printStackTrace ();} g95`.V} } @2v_pJy^ } z,%$+)K 2SR: FUV/ t#eTV@- //打印回应的头信息 !m?-!: public void logResponseHead(HttpURLConnection con) d9|<@A { 3|Xyl`i4o for(int i=1;;i++) "`1bA"E { }?v )N).kW String header=con.getHeaderFieldKey(i); Z>#i** if(header!=null) 2Q:+_v //responseHeaders.put(header,httpConnection.getHeaderField(header)); ^&Y#)II Utility.log(header+" : "+con.getHeaderField(header)); ~2khgZ else 0% I=d break; @>H75 } ,UdVNA } 4x[S\,20 07=mj%yV t}/( b/VD public void splitterStop() x`)&J
B { G[q$QB+ bStop = true; `%WU8Yv } Uq`'}Vo 2WYPO"q
ls)%c } {h`uV/5@` >`ZyG5 Jo23P.#< /* 1|-Dj| **FileAccess.java 8E]F$.6U *//文件访问(定位,写) RhLVg~x package NetFox; 3I-MdApT import java.io.*; o J;$sj rguC p}r y9}>: pj4 public class FileAccessI implements Serializable{ e'b(gD} 8 uwq-/$ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 n^6j9FQ7 RandomAccessFile oSavedFile; N^:9Fz long nPos; -4_$lnw$ x5 *!Wx
(qulwOt~w public FileAccessI() throws IOException sYf~c0${ { G{%L B}2 this("",0); fNZ__gO!% } t |A-9^t'! (0y~%J V[vl!XM public FileAccessI(String sName,long nPos) throws IOException s#=7IH30 { m5Di=8 oSavedFile = new RandomAccessFile(sName,"rw"); N7R!C)!IL this.nPos = nPos; '}bgLv oSavedFile.seek(nPos); ;cN{a& } >[=^_8M 9j:"J` ' E\pL!c public synchronized int write(byte[] b,int nStart,int nLen) \&gB)czEO { HEc+;O1< int n = -1; X1vd'> try{ M{hg0/}sUW oSavedFile.write(b,nStart,nLen); qR+!l( n = nLen; !^Y(^RS@ } 6MdiY1Lr!K catch(IOException e) agW@{c { UH/\ e.printStackTrace (); ,f;}|d:r } 2Dj%,gaR :@A9](gI
yhA6i return n; M%;hB*9 } L.0mk_&
3]3| v9O~@v{= } Q%mB|i|
':m,)G5& m<"WDU?y; /* HYSIN^<oy **SiteInfoBean.java tr}Loq\y */ *CTlOy package NetFox; `t'W2X {
W{]L: 0$fpIz public class SiteInfoBean { N `F~n%N 7 X'u6$i XaPV94 private String sSiteURL; //Site's URL k%QpegN private String sFilePath; //Saved File's Path l u%}h7ng private String sFileName; //Saved File's Name 9kS^Abtk private int nSplitter; //Count of Splited Downloading File &t:Gx<] FNY8tv*/x b9<#K+L- public SiteInfoBean() $F+ L Ds {//nSplitter的缺省值为5 |f_[\&<* //default value of nSplitter is 5 A*P|e-&Q8 this("","","",5); t+T4-1 3a } 74k dsgQf p\aaJ o;<Xo& public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) mg.kr: { 3/W'V,5G6 sSiteURL= sURL; 3c6b6 sFilePath = sPath; oij}'|/Jc sFileName = sName; .qZ~_xk d this.nSplitter = nSpiltter; z]`k#O%%) 9b"=9y, 9=h'9Wo } <oA7'|Bu< 2OR{[L*
b:]V`uF? public String getSSiteURL() A='N=^Pm { y^v6AM return sSiteURL; 0rG^,(3m } ?8Z0Gqt74 .-oxb,/ ?FF4zI~ public void setSSiteURL(String value) q]e`9/U { O%KsD[W; sSiteURL = value; =Bhe'.]QSx } qPy1;maXP kN4{13Qs* 64G[|" j D public String getSFilePath() k" PayyAC { 5T2CISmu return sFilePath; ``\i58K{e } EL 8<U l@+7:n4K0 JJ2_hVU public void setSFilePath(String value) :hFIl0$,"3 { 4V i`* ! sFilePath = value; 1A G<$d5U| } $ig0j` D" rK( J1sv[$9 public String getSFileName() hp7|m0.JW { ?6un4EVL{ return sFileName; UK O[r; } ^!ZC?h!rG YS@ypzc/ J1I ;Jgql( public void setSFileName(String value) ERE)A-8 { ^N;.cY sFileName = value; TNY&asQo } GyIT{M}KV *|C^=*j9 xLWwYK public int getNSplitter() $oU*9}}Rn { b TM{l.Aq3 return nSplitter; %GA"GYL9' } evAMJ= -Rd/Gx #_J@-f7^ public void setNSplitter(int nCount) pg.ri64H< { UT=tT)4b nSplitter = nCount; F{Jw^\ } NOiN^::m } ,p2s:&" KgiJUO`PR Yu[ t\/ /* f~y%%+{p
**Utility.java >x+6{^}Q > */ o` ZQ d,3 package NetFox; Avd
^ )d1_Wm#B ,PuL{%PXu public class Utility { r1.nTO% zHL@i0>^ ICs\
z public Utility() %g$V\zmU { /VS[pXXT| ,dov<U[ia (-xS?8x$ } Gh}LlX!w Y*>#T //线程睡眠 7;sj%U^'l public static void sleep(int nSecond) bRJMYs {
1 +qw$T try{ t2"O Thread.sleep(nSecond); qnJt5 } ?NR A:t(} catch(Exception e) wF,UE_ { iH@yCNE" e.printStackTrace (); VsgE!/>1 } qY<'<T4\ } ujaGNg?, !2A:"2Kys: //日志 +!z{5: public static void log(String sMsg) RIXMJ7e7 { RHq/JD- System.err.println(sMsg); Z!@~>i } *-q"3D` Nq` C.& P 8>d6;o($ public static void log(int sMsg) xA1hfe.9 { WZ7BoDa7O System.err.println(sMsg); KgOqbSJ } Mjfx~I27 } ~Ro9up s3O} 6 Q`D~5ci /* YW`,v6 **TestMethod.java (TwnkXrR, */ "@d[h ,TM package NetFox; 3k#/{Z }YMy6eW4 t!x5 fNo) public class TestMethod { y[\VUzD*' m&\h4$[kql l>{R`BZ/ public TestMethod() +~roU{& o { ///xx/weblogic60b2_win.exe ?~;:jz|9<' try{ ]dk8lZ;bo SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); YZ7|K< //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 8`
@G; o SiteFileFetch fileFetch = new SiteFileFetch(bean); M^iU;vo fileFetch.start(); RIE5KCrGB } h0-hT catch(Exception e){e.printStackTrace ();} Zh*u(rO Z@&Dki Ucm :S- }
Nwt" \3 Bj}^\Pc;} {>,V\J0p public static void main(String[] args) +
33@?fl. { %Gj8F4{ new TestMethod(); '|*?*6q } Yd= a}T } 9^Whg~{ 点击下载更多相关资料
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