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/* <g/(wSl **SiteFileFetch.java \^;|S */ c9ov;Bw6S package NetFox; {g:/BFLr# import java.io.*; C9z~)aL}7 import java.net.*; QU,TAO NZ%~n:/V# p.TiTFu/ public class SiteFileFetch extends Thread { ai;gca_P# tsSS31cv iuU3*yyn SiteInfoBean siteInfoBean = null; //文件信息Bean 23u1nU[0 long[] nStartPos; //开始位置 dx?njR long[] nEndPos; //结束位置 ^b `>/> FileSplitterFetch[] fileSplitterFetch; //子线程对象 G|6 |; long nFileLength; //文件长度 W_f"Gk boolean bFirst = true; //是否第一次取文件 $E9daUt8"J boolean bStop = false; //停止标志 F)<G]i8n~ File tmpFile; //文件下载的临时信息 mb*h73{{ DataOutputStream output; //输出到文件的输出流 !ovZ>,1 OL
]T+6X //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ixJ20A7 public SiteFileFetch(SiteInfoBean bean) throws IOException ubN"(F:!-S { O.up%'%, siteInfoBean = bean; FOUs=
E[ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Y5A~iGp8E tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); G}?P
r4Gj if(tmpFile.exists ()) j2{,1h j { A2O_pbQti bFirst = false; \,cKt_{ u read_nPos(); E_gDwWot } (.XDf3 else neY=:9 { ^p- e nStartPos = new long[bean.getNSplitter()]; E[Ws} n. nEndPos = new long[bean.getNSplitter()]; 18w^7!F?~u } eze(>0\f 2}#wdJ` 6_&6'Vq ?o(X0 } uA/.4 b }vxH)U6$q m[Ac'la public void run() !wb~A0m { xdBZ^Q //获得文件长度 5bznM[%xO //分割文件 d
@kLLDP //实例FileSplitterFetch ?VN]0{JSp //启动FileSplitterFetch线程 (#l_YI
- //等待子线程返回 G$kwc
F'C try{ NUNn[c if(bFirst) UE#Ni 5 { aaD$'Y,<>B nFileLength = getFileSize(); at(p,+ % if(nFileLength == -1) Jx
;"a\KD { ):\{n8~ System.err.println("File Length is not known!"); RW PdS } )w
8lusa else if(nFileLength == -2) ,vdP
#: { s$\8)V52 System.err.println("File is not access!"); B[_b J
* } >0+|0ba else 2=,Sz1`t {
2:5gMt for(int i=0;i<nStartPos.length;i++) v0MOX>`s { oY6|h3T=Q$ nStartPos = (long)(i*(nFileLength/nStartPos.length)); n
ua8y(W } #`L}. for(int i=0;i<nEndPos.length-1;i++) g*c\'~f; { 0V,MDX}#_ nEndPos = nStartPos[i+1]; ~S_IU">E } irw 7 nEndPos[nEndPos.length-1] = nFileLength; Z
*<x } `8.32@rUB. } {2clOUi pfQZ|*>lkb l}-`E@w //启动子线程 /\$|D&e
fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; SF7b1jr for(int i=0;i<nStartPos.length;i++) "XsY~ { A-Pwi.$ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), W#_gvW siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), KdMA58) nStartPos,nEndPos,i); FRQ("6( Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -LK(C`gB fileSplitterFetch.start(); O8N0 ]Mz } h:;eh // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `"": siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); .:!x*v // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", }J'wz;t1 nEndPos = " + nFileLength); G/3lX^Z> // fileSplitterFetch[nPos.length-1].start(); >37}JUG UXB8sS*wQ? fvMhq:Bu //等待子线程结束 ',s7h" //int count = 0; U105u.#7 //是否结束while循环 !,!tNs1 K boolean breakWhile = false; E^W*'D \0T*msYQ %vYlu%c< while(!bStop) 1gej$G@ { (wF$"c3'{ write_nPos(); $v@$oPmMj Utility.sleep(500); =V]i?31[ breakWhile = true; Q09~vFBg 58'y~Ou H>X1(sh#} for(int i=0;i<nStartPos.length;i++) 7tKft { g}r5ohqC# if(!fileSplitterFetch.bDownOver) {&qsh9ob { ?o5#Ve$-X breakWhile = false; G/44gKl break; ^l9
*h } jV&W[xKa } E?D{/k,zZ if(breakWhile) FGhrf break; 0M2+?aKif Xtnmh)'K~# 'z!#E!i //count++; f|1FqL+T] //if(count>4) <f{`}drp/ // siteStop(); Cy'W!qH } <%uZwk># rWKLxK4oU k\Tm?^L) System.err.println("文件下载结束!"); `9{C/qB } sc>)X{eb catch(Exception e){e.printStackTrace ();} u`,R0=<4 } A_U0HVx_ K
:ptfD Bin&:%|9? //获得文件长度 3"D00~ public long getFileSize() x+`3G. { R:x04!} int nFileLength = -1; c}s3c
>`d try{
|sM#g1D@ URL url = new URL(siteInfoBean.getSSiteURL()); [N+ruc?) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); pvxqeC9` httpConnection.setRequestProperty("User-Agent","NetFox"); g c=|<( tzJtd =DwH*U/YR int responseCode=httpConnection.getResponseCode(); "z4E|s if(responseCode>=400) UpBYL?+L { q`zR 6 processErrorCode(responseCode); aKr4E3` return -2; //-2 represent access is error :8T@96]P } o%Q2. .sMi"gg ?IO/zkeXg String sHeader; <WkLwP3^ :b)@h|4 H}rP{`m for(int i=1;;i++) $R36`wk { * OFT)S //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); #]^`BQ> //Utility.log(in.readLine()); ;yrcH+I$_ sHeader=httpConnection.getHeaderFieldKey(i); ]2
N';(R if(sHeader!=null) oD`BX { |8ZAE%/d if(sHeader.equals("Content-Length")) zaPR>:r0 { THZ3%o=X nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); l]cQ7g5 break; cn{l
%6K } 4}j}8y2)H } oWOZ0]H1 else :g_ +{4 break; Id1[}B-T
} <3OV } oaE3Aa catch(IOException e){e.printStackTrace ();} aS2
Y6 catch(Exception e){e.printStackTrace ();} Gu=bPQOj ZrBxEf$f qxh\umm+2 Utility.log(nFileLength); hw2Hn
vkLG<Y ['j,S<Bu~ return nFileLength; qI:wm= } huE#VY
/t c:5BQr
' CPG %*E* //保存下载信息(文件指针位置) 4mg&H0 ! private void write_nPos() I&0yUhn { z/=v@@tj try{ [g_@<?zg output = new DataOutputStream(new FileOutputStream(tmpFile)); iV=#'yY output.writeInt(nStartPos.length); >LSA?dy!? for(int i=0;i<nStartPos.length;i++) ^,gKA\Wli { suwj1qYJ4 // output.writeLong(nPos); #.RI9B output.writeLong(fileSplitterFetch.nStartPos); TvR2lP output.writeLong(fileSplitterFetch.nEndPos); va.wdk g } 1GxYuTZ{ output.close(); %/y/,yd } Qt$Q/<8U catch(IOException e){e.printStackTrace ();} ADDp m-] catch(Exception e){e.printStackTrace ();} V
RL6F2 >6 } #S5vX<"9 ,MJZ*"V/3 QX4I+x~oo\ //读取保存的下载信息(文件指针位置) CT : ac64 private void read_nPos() Jor?;qo3 { Sn]A0J_ try{ :?TV6M DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); h4CB1K int nCount = input.readInt(); 9}-,dgAB nStartPos = new long[nCount]; i || /=ai nEndPos = new long[nCount]; +^.(3Aw for(int i=0;i<nStartPos.length;i++) k&2I(2S { 6S(3tvUr nStartPos = input.readLong(); ~kL":C>2 nEndPos = input.readLong(); <8Ad\MU } Hd:ZE::Q'# input.close(); 8K qv)FjB
} +W}f0@#)< catch(IOException e){e.printStackTrace ();} 8PQ& 7o catch(Exception e){e.printStackTrace ();} rRMC<.= } D 6(w}W 0y(d|;': g7F>o76M private void processErrorCode(int nErrorCode) {974m` 5 { p|Ln;aYc System.err.println("Error Code : " + nErrorCode); -Fb/GZt| } |Q{ l]D l4; LV7Ji CyE.q^Wm //停止文件下载 5d)G30 public void siteStop() K3jno+U& { Qtk'^Fc bStop = true; #2pgh? for(int i=0;i<nStartPos.length;i++) TGg* (6'z fileSplitterFetch.splitterStop(); Y$N|p{Z
>IRo]-, A2B&X}K|U } Dv$xP)./ } 1vobfZ-w9 //负责部分文件的抓取 1$c*/Tc:E **FileSplitterFetch.java 0j3j/={|.1 */ fUa`YryQ package NetFox; U_w)*)F -wY6da*.W 2WKA] l; import java.io.*; qoEOM%dAqV import java.net.*; FrB19 \PL92HV 1aSuRa public class FileSplitterFetch extends Thread { Jg7IGU(dct ek.L(n,J| -2f0CAh~ String sURL; //File URL pnf3YuB long nStartPos; //File Snippet Start Position }=wSfr9g long nEndPos; //File Snippet End Position iXBc ~S int nThreadID; //Thread's ID O^LzS&I*
boolean bDownOver = false; //Downing is over 'A4Lr
boolean bStop = false; //Stop identical q+SDJ?v FileAccessI fileAccessI = null; //File Access interface ?L|@{RS{| 7^S &g.A H>M0GL public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException y1P ?A]v { ~jJu*s$? this.sURL = sURL; gp;(M~we
this.nStartPos = nStart; wjY3:S~ this.nEndPos = nEnd; <;=X7l+ nThreadID = id; X\M0Q%8 fileAccessI = new FileAccessI(sName,nStartPos);//定位 dlyE2MiL: } eE1w<] Eg D`Fl*Wc4H y9:|}Vh public void run() #*?a" { yBeSvsm while(nStartPos < nEndPos && !bStop) F+9|D { ;IwC`!(# Jzh_`jW0l 6=FF*"-6E try{ ^lbOv}C* URL url = new URL(sURL); DLf6D |" HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ZcIwyh(` httpConnection.setRequestProperty("User-Agent","NetFox"); GQT|T0>Ro String sProperty = "bytes="+nStartPos+"-"; =TU"B-* httpConnection.setRequestProperty("RANGE",sProperty); UtY<R Utility.log(sProperty); p-MQI } 4_)@Nq 5q@o,d InputStream input = httpConnection.getInputStream(); v;irk<5 //logResponseHead(httpConnection); t hTY('m h2K1|PUKl[ q^k6.5*" byte[] b = new byte[1024]; L7C!rS int nRead; J$@3,=L6V while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ga0W;Vq&X { , En
D3
| nStartPos += fileAccessI.write(b,0,nRead); "m(HQ5e)* //if(nThreadID == 1) nQb{/ TqC' // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); e*=N \$ } ,"5Fw4G6* V] <J^m8 8.F]&D0p8 Utility.log("Thread " + nThreadID + " is over!"); `+{|k)2B bDownOver = true; #|xK>; //nPos = fileAccessI.write (b,0,nRead); _L<IxOZh+ } mi6<;N2w| catch(Exception e){e.printStackTrace ();} /a(xUm @. } [$
vAjP } 7P|GKN~ eBlVb*nmq Sc`W'q^X //打印回应的头信息 aU4v-9@U8 public void logResponseHead(HttpURLConnection con) u#ag|b/C: { ;gP@d`s for(int i=1;;i++) $x)C_WZj? { %\Z{~(&-v String header=con.getHeaderFieldKey(i); OxZw;yD if(header!=null) L?23Av0W //responseHeaders.put(header,httpConnection.getHeaderField(header)); ag+$qU Utility.log(header+" : "+con.getHeaderField(header)); Rbm"Qz else 37Q9goMov break; G n>#Mvq } 6p=AzojoB } KD11<&4_x `
zeZ7: }YfM< public void splitterStop() TGl It<& { nB[Aw7^|A bStop = true; 0hp*(, L } j|N;&s` tg_v\n gf$5pp- } KU|dw^Y k sL[&y'+ 1\X1G>60m /* *F42GiBZR **FileAccess.java URz$hcI8 *//文件访问(定位,写) 8vjaQ5
package NetFox; D~P I_*h. import java.io.*; fo;Ftf0 no~hYyW2 HN9!~G public class FileAccessI implements Serializable{ mI_ ?hl?Pv iaPrkMhd //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 wi-O}*O
RandomAccessFile oSavedFile; zUF%`CR long nPos; R2|v[nh N|WZk2 " K; ,2ag public FileAccessI() throws IOException :FcYjw { @8a1a3_F this("",0); |1iCt1~U } z~i=\/~tZ Yx>y(Whu. 16Ym*kWIps public FileAccessI(String sName,long nPos) throws IOException V<A_c^unO { $iu{u|VSu oSavedFile = new RandomAccessFile(sName,"rw"); 4=^_ 4o2 this.nPos = nPos; zGjf7VV2a oSavedFile.seek(nPos); 3\j{*f$J } kGR5!8$z >|1.Z'r/ 0.7*2s- public synchronized int write(byte[] b,int nStart,int nLen) U{6i5;F#H { aZ"9)RJe int n = -1; 1iyd{r7| try{ F0
x5(lpQ oSavedFile.write(b,nStart,nLen); ?nN3K n = nLen; $Hh3*reSg- } zX*+J"x catch(IOException e) MLf,5f;e { !|}(tqt e.printStackTrace (); A14} } Hyx%FN= &.~Xl:lq s4h3mypw return n; ME4Ir } t_%6,?S6 MDI[TNYG rWzw7T~ } 1<g,1TR aMI\gCB/ g|L" |Q /* J}a 8N.S **SiteInfoBean.java 46^LPC"x */ "_dh6naZX package NetFox; 2O}UVp> fS2 ^$"B| H=Sy. public class SiteInfoBean { yv2BbrYyy }H2<w-,+ 5[NF private String sSiteURL; //Site's URL nW?DlECo? private String sFilePath; //Saved File's Path z@5t7e)!R private String sFileName; //Saved File's Name (9R;a np private int nSplitter; //Count of Splited Downloading File ~{MmUp rS u7R:7$H pI*/-!I public SiteInfoBean() c}(fmJB&( {//nSplitter的缺省值为5 ,2hZtJ<A //default value of nSplitter is 5 ;`ZGiax this("","","",5); Id-?her>B } V0y Q t<'-?B2g ^@V$'Bk public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ^}nz^+R { `72 uf<YQ sSiteURL= sURL; v}w=I}<x sFilePath = sPath; J<8~w; i sFileName = sName; +o&&5&HR this.nSplitter = nSpiltter; %*d(1?\o DxX333vC =+@Ip Xj } 5\1C@d B1\@ n$ @#sBom+K` public String getSSiteURL() |4RuT
.-o { 7kbeAJ+{ return sSiteURL; ZLK@x.= } )'\pa2 %*4Gx +b w783e public void setSSiteURL(String value) n- cEa/g { 49Sq)jd< sSiteURL = value; uYk4qorA } doJ\7c5uU MN|8(f5Gs -26GOS_8z public String getSFilePath() T/8*c0mU { 9n][#I)a3 return sFilePath; zD8q(]: A } OW$?
6 "f'pa&oHi bvM\Qzc!<3 public void setSFilePath(String value) |UbwPL_L { xxnMvL; sFilePath = value; $O|J8; "v } Rxe
sK 6.fahg?E +{* @36A5A public String getSFileName() Q=hf,/N { xv!
QO return sFileName; 3W*O%9t7 } M[9]t(" C+/D!ZH%P O{"
A3f public void setSFileName(String value) ((BuBu> { nx<q]Juv\ sFileName = value; gB\
a } 0>jo+b\D$ vF45tw 71GLqn? public int getNSplitter() Oh9jr"Gm= { 4%5H<:V7 return nSplitter; n
ETm" } XO |U4#ya r{~K8!=oU] "WKE%f public void setNSplitter(int nCount) J?Kgev% { !?Tu pi nSplitter = nCount; n1Ag o3NM } 7QdU|1] } E%L]ifA9! ,nMc.
G3 $~,]F
/* qwka77nNT **Utility.java 8.vPh */ GvQ|+vC package NetFox; 'WH@Zk/l M5OH-' w+vYD2a public class Utility { d7o~$4h| kTQ`$V(>& 'ad|@Bh public Utility() m9^?p { #+Lo&%p#3 h#bpog 1a{~B# } [MM11K h~$Q\WCm# //线程睡眠 @vf{_g< public static void sleep(int nSecond) 7Kx3G{5ja { yc,Qz.+g try{ Z@j$i\,` Thread.sleep(nSecond); E&k{ubcT } 6ju+#]T catch(Exception e) r\+AeCyb"p { "HR
&Rf k e.printStackTrace (); ;FYiXK% } luZqW`?Bt } Yyl2J#$! k|l"Rh<\~ //日志 p\e*eV1dxx public static void log(String sMsg) ;8sEE?C$g { o?P(Fuf System.err.println(sMsg); }#@P+T:b } ]3#_BL)M8p ;2RCgX!'% BzH7E[R49 public static void log(int sMsg) (mHFyEG { yS/ovd System.err.println(sMsg); <PkDfMx2 } _-g:T } #'z\[^vp 57+^T}/> ,<zZKR_ /* lqPRUkin **TestMethod.java iXC/?
EK4 */ =1n>vUW+J package NetFox; b]6;:Q!d "/hs@4{u9 ,%dn)gt7 public class TestMethod { $y=sT({VVe -GP+e`d s@o"V >t public TestMethod() )@Xdr0 { ///xx/weblogic60b2_win.exe Y_PCL9G{p try{ 5n.4>yOY SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ^f!d8
V //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); !0`ZK-nA6 SiteFileFetch fileFetch = new SiteFileFetch(bean); : M0LAN fileFetch.start(); C bG"8F|4 } @]*z!>1 catch(Exception e){e.printStackTrace ();} a|?CC/Ra hUGIy( 7"4|`y^# } x)#k$QU 1aYO:ZPy 9>@_};l public static void main(String[] args) >!? f6
{\| { 40%p
lNPj new TestMethod(); !^q<)!9<EO } @u6#Tvxy[ } ZWf{!L,@Z 点击下载更多相关资料
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