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/* QWO]`q`| **SiteFileFetch.java grom\ */ :1wrVU-?h package NetFox; WNX5iwm import java.io.*; .qD@
Y3- import java.net.*; p3x?[Ww yi6N-7 `wz[='yM public class SiteFileFetch extends Thread { U]6&b !kuX,*}q /8yn vhF# SiteInfoBean siteInfoBean = null; //文件信息Bean (nSml,gU long[] nStartPos; //开始位置 0JyVNuHn long[] nEndPos; //结束位置 HM[klH]s= FileSplitterFetch[] fileSplitterFetch; //子线程对象 "E*e2W long nFileLength; //文件长度 "9y(
} boolean bFirst = true; //是否第一次取文件 K7TzF& boolean bStop = false; //停止标志 j f~wBmd7 File tmpFile; //文件下载的临时信息 lTRl"`@S DataOutputStream output; //输出到文件的输出流 ,I.WX,OR ?,knit2x //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) e)^j+ l public SiteFileFetch(SiteInfoBean bean) throws IOException 6cS>bl { X*eW#|$\ siteInfoBean = bean; Vzlh+R>c //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); uBnoQ~Qd[z tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); K!z` if(tmpFile.exists ()) p]G3)s@> { w!^~<{Kz bFirst = false; G 7LIdn= read_nPos(); Q\Kx"Y3i } \fWW' else 'cZN{ZMWG { TYns~X_PR nStartPos = new long[bean.getNSplitter()]; "h"NW[R nEndPos = new long[bean.getNSplitter()]; T<b+s#n4 } kyw/LE3$- A#h /B+ |AhF7Mj* T)~9Wac } -~f511<
]B\H~Kn =^DLywAh}u public void run() G'z{b$?/[ { =<z.mzqu5 //获得文件长度 1=}qBR#scY //分割文件 '\q f^?9 //实例FileSplitterFetch ~g;
//启动FileSplitterFetch线程 {MdLX.ycc) //等待子线程返回 k0z&v < try{ ,YYVj{~2 if(bFirst) 2{,n_w?Wy { 9SQ4cv*2 nFileLength = getFileSize(); A=5epsB if(nFileLength == -1) q%YV$$c { R,2P3lv1v@ System.err.println("File Length is not known!"); 0ZpFE& } CO+/.^s7}S else if(nFileLength == -2) (7FW9X; { LtgXShp_! System.err.println("File is not access!"); ,,L2(N } VR{+f7:} else tB7}|jC { d(`AXyw for(int i=0;i<nStartPos.length;i++) vV?rpe|% { c"tJld5F_ nStartPos = (long)(i*(nFileLength/nStartPos.length)); vdDludEv } XM1`x for(int i=0;i<nEndPos.length-1;i++) }R4c { ;lX(}2tXW nEndPos = nStartPos[i+1]; E.bi05l } sW#JjtK nEndPos[nEndPos.length-1] = nFileLength; PCrU<J 7 } }G <T :(a } `lDut1J5n P(k(m<0 z&8un%Jt //启动子线程 `6Qdfmk= fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; |R/.r_x,V? for(int i=0;i<nStartPos.length;i++) d)o!5L { Ck =;1sGh fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), B$Z3+$hfF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), m#/_x nStartPos,nEndPos,i); Z;Rp+X Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); U5HKRO fileSplitterFetch.start(); HmmS(fU } s)
O[t // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #EGA#SKoq siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ,B}I?vN. // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", fU3`v\X nEndPos = " + nFileLength); 7}O.wUKw% // fileSplitterFetch[nPos.length-1].start(); D#A~Nbc &)F*@C- RkeltE~u //等待子线程结束 b^c9po //int count = 0; smY$-v)@ //是否结束while循环 CWo1.pV w boolean breakWhile = false; '|>9C^E9X uQb!= ] tirIgZ while(!bStop) -D^A:}$ { )3<:tV8 write_nPos(); o_M.EZO Utility.sleep(500); _Us*+
2(4L breakWhile = true; A=zPLq{Sb )2q~u%9n gd/H``x|Y for(int i=0;i<nStartPos.length;i++) |%a4`w { %h"z0@+ if(!fileSplitterFetch.bDownOver) d'6|: z9c { w@\vHH.;V breakWhile = false; hG~reVNf break; @Y,7'0U } #3=P4FUz. } ?Ucu#UO if(breakWhile) HBE.F&C88 break; 3ss6_xd+ :1q4"tv| q-ES6R //count++; W,@
If} //if(count>4) &5{xXWJK // siteStop(); mV^Zy } dBV7Te4L F(#rQ_z] ZPN
roCK` System.err.println("文件下载结束!"); i|)Su4Dw } 6&Juv catch(Exception e){e.printStackTrace ();} 5m:i6,4 } RyB~Lm`ZK% hd V1nS$ H y"x //获得文件长度 ;< )~Y- public long getFileSize() oY~ Dg { ~n')&u{ int nFileLength = -1; Z4$cyL'$P try{ [
=x s4= URL url = new URL(siteInfoBean.getSSiteURL()); 4F>Urh+ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); t&Os;x?To? httpConnection.setRequestProperty("User-Agent","NetFox"); /y7M lU9 E@05e W>(/ bX int responseCode=httpConnection.getResponseCode(); P #F=c34u if(responseCode>=400) vzel# { Y!q!5Crfi processErrorCode(responseCode); r,goRK. return -2; //-2 represent access is error Hd7,ZHj3^ } C9DJO:f.2y H2xeP%;$ ,B&fFis String sHeader; I\?9+3 XnQ . #Z+Z kc'pN&]r: for(int i=1;;i++) :f5s4N { UX<Qcjm$e //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); +bK.NcS //Utility.log(in.readLine()); ^ 5VK> sHeader=httpConnection.getHeaderFieldKey(i); GhY1k"; if(sHeader!=null) 5m=I*.qE { MC((M,3L if(sHeader.equals("Content-Length")) bb42v7? { b?4/#&z] nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); M}_i52 break; Kz<@x`0 } 8By,#T". } ]u-]'P else I]Tsz'T!9 break; ``,k5!a66\ } 3lLMu B+ } E+"dqSI/v catch(IOException e){e.printStackTrace ();} ._wkj catch(Exception e){e.printStackTrace ();} Giq=*D+ 5WqXo{S >StO.Q99 Utility.log(nFileLength); 5G0$ kY,U8a3! 1C Pjil*eb return nFileLength; b5m=7;u*h } MC0TaP #zrTY9m7 m|=Ecu //保存下载信息(文件指针位置) cw&Hgjj2
private void write_nPos() @ DZD { O9'x-A% try{ +5.t. d output = new DataOutputStream(new FileOutputStream(tmpFile)); ri C[lB output.writeInt(nStartPos.length); N4;7gSc" for(int i=0;i<nStartPos.length;i++) ]Mj/&b>"e { Sp}D;7 // output.writeLong(nPos); vhvdKD
output.writeLong(fileSplitterFetch.nStartPos); vQF
vtwd output.writeLong(fileSplitterFetch.nEndPos); cH<q:OYi } gef6pfV output.close(); `G1&Z]z } 2eeQ@]Wj[Z catch(IOException e){e.printStackTrace ();} kVI#(uO catch(Exception e){e.printStackTrace ();} sC00un% } S~qZr d0hhMx6$ Y
$g$x<7 //读取保存的下载信息(文件指针位置) 9p 4"r^ private void read_nPos() Obw?_@X { '^%~JyU try{ )CI1; DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); w|mb4AyL{? int nCount = input.readInt(); KtS)'jf nStartPos = new long[nCount]; d|Gl`BG
nEndPos = new long[nCount]; EA.D}X C for(int i=0;i<nStartPos.length;i++) M,j(=hRJ/E { &)i|$J 2. nStartPos = input.readLong(); E6Rz@"^XV nEndPos = input.readLong(); sfr(/mp( } n/QF2&X7) input.close(); =O _z( } d1!i(MaV! catch(IOException e){e.printStackTrace ();} ~zm7?_"@] catch(Exception e){e.printStackTrace ();} jUj<~:Q}3o } #{r#;+ e@@?AB$n( ,=(Z00#( private void processErrorCode(int nErrorCode) nI*/Mhx { FZd.L6q System.err.println("Error Code : " + nErrorCode); Mcw4!{l` } n[Zz]IO,g -K(fh#<6KO K|C^l;M6 //停止文件下载 $@\mpwANl public void siteStop() Z') pf { rOW-0B+N bStop = true; n}A\2bO for(int i=0;i<nStartPos.length;i++) . .QB~ fileSplitterFetch.splitterStop(); cN! uV-e
s6
( z ?#0snlah| } C\_zdADUb% } N_4eM,7t //负责部分文件的抓取 _a_xzv' **FileSplitterFetch.java *KK+X07 */ rI5Foh6 package NetFox; vgn@d,v
gB\T[RV 2)?(R;$, import java.io.*; rdJm{< import java.net.*; -3Avs9`5 /Y[~-Y+!, PIA)d-Z public class FileSplitterFetch extends Thread { 4vK8kkW1 s/"&9F3 Zn:R
PMk* String sURL; //File URL y`e4;*1 long nStartPos; //File Snippet Start Position Xqp|VbDca long nEndPos; //File Snippet End Position JXiZB
8} int nThreadID; //Thread's ID 8T;IZ(s boolean bDownOver = false; //Downing is over n<Svwa} boolean bStop = false; //Stop identical wI M{pK FileAccessI fileAccessI = null; //File Access interface {vaaFs B}OY/J/*8 Gx?+9CV public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException DPe]daF { +c:3o* this.sURL = sURL; 4A{|[}! this.nStartPos = nStart; nU+tM~C%a this.nEndPos = nEnd; ?:^mBb)T nThreadID = id; n?#!VN3 fileAccessI = new FileAccessI(sName,nStartPos);//定位 Z>F^C}8f } Nd:R"
p*8 \u`)kJ5o1 |1Dc!V'?" public void run() +i `*lBup$ { (VvKGh while(nStartPos < nEndPos && !bStop) LiDvaF:@L! { dGZntT2D W[[oSqp gOT+%Ab{_ try{ J?)RfK|! URL url = new URL(sURL); LCXO>MXN HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ZZ/cq:3$ P httpConnection.setRequestProperty("User-Agent","NetFox"); @e~]t}fH String sProperty = "bytes="+nStartPos+"-"; OwzJO httpConnection.setRequestProperty("RANGE",sProperty); di9!lS$ Utility.log(sProperty); ,O=a*%0rt \8uo{#cL8 2.}R InputStream input = httpConnection.getInputStream(); !=Y;h[J.p //logResponseHead(httpConnection); CR4rDh8z a ?tf&pgo VvByHcLv byte[] b = new byte[1024]; ;y?);!g int nRead; _\5~>g_ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 71FeDpe { 6XEZ4QP} nStartPos += fileAccessI.write(b,0,nRead); `U!y&Q$, //if(nThreadID == 1) GYRYbiwqdi // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); '/0#lF } W:&R~R k!jNOqbb ~CRSL1? Utility.log("Thread " + nThreadID + " is over!"); K5 3MMH[q# bDownOver = true; VCNT4m //nPos = fileAccessI.write (b,0,nRead); Mro4`GL } gLD`wfZR catch(Exception e){e.printStackTrace ();} {!ZyCi19 } ^jdL@#k00 } |wxGpBau ~KjJ\b)R ;:&?=d //打印回应的头信息 ,reJ(s public void logResponseHead(HttpURLConnection con) ~ <0Z>qr { :L?_Y/K for(int i=1;;i++) FD7H@L5 { hVoNw6fE String header=con.getHeaderFieldKey(i);
R)Q4 if(header!=null) 9V1cdb~?"T //responseHeaders.put(header,httpConnection.getHeaderField(header)); P=AS>N^yaL Utility.log(header+" : "+con.getHeaderField(header)); O[~x_xeW else S{F-ttS" break; 4Tzd; P6_ } 3{raKM6F } !&kL9A). +,'T=Ic{ zbw7U'jk public void splitterStop() ! U0z" { \L!uHAE2a bStop = true; `&7RMa4= } A Ayv )9"oL!2h :LJ7ru2 } :bM+&EP `linG1mF u.|~
/* C.a5RF0 **FileAccess.java TT!ET<ciN *//文件访问(定位,写) Hy;Hs# package NetFox; 7l8[xV
import java.io.*; j28 _HhT l4'~}nn(Y 9
wa,k public class FileAccessI implements Serializable{ I d8wS!W`7 (ClhbfzD //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 V*n==Nb5L RandomAccessFile oSavedFile; 5vp|?-\h> long nPos; A;K(J4y* IFNWS,: %Tcf6cK" public FileAccessI() throws IOException -<f/\U { 0Vv9BL{ this("",0); *DeTqO65 } HB&
& <)m%*9{ Iq'O public FileAccessI(String sName,long nPos) throws IOException ,4F,:w { 9V!-ZG oSavedFile = new RandomAccessFile(sName,"rw"); `_AM` >_ this.nPos = nPos; 0LVE@qEL oSavedFile.seek(nPos); #Fd W/y5 } DQ!J!ltQ 3><u*0qe%I 9w~cvlv[ public synchronized int write(byte[] b,int nStart,int nLen) 8:;#,Urr { D!>
d0k,Y int n = -1; e$l6gY try{ LVtu*k oSavedFile.write(b,nStart,nLen); 9Ld9N;rWm# n = nLen; <bmLy_": } hq_~^/v\ catch(IOException e) )@7DsV/M { ija:H'j e.printStackTrace (); s${_K* g6 } =G>(~+EA &~~s6
4 rB8Nm1 return n; ]
pPz@@xx } /)#8)"`nT ziL^M"~2 _vYzF+ } ?X_V#8JK U{1z;lJ \ElX~$fS /* O]=C#E{ **SiteInfoBean.java ?C;JJ#Ho */ D[Iqn package NetFox; w+UV"\!G)Q h8}8Lp(/' g'lT public class SiteInfoBean { 8OAg~mQ15( (!zM\sF Z!\@%`0$ private String sSiteURL; //Site's URL xfHyC'? private String sFilePath; //Saved File's Path !Tfij(91 private String sFileName; //Saved File's Name F>Jg~ FD* private int nSplitter; //Count of Splited Downloading File iBbbr, i ^|@"+ 4,}GyVJFb` public SiteInfoBean() MV936 {//nSplitter的缺省值为5 I-:`cON=G //default value of nSplitter is 5 Vewzo1G2 this("","","",5); d'zT:g } H?:Jq\Ba0 -J$g(sikt 7kz-V. public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) kL7^$ { ?SX_gYe9 sSiteURL= sURL; 1r4,XSk sFilePath = sPath; 981!2* sFileName = sName; ~mH+DV3
this.nSplitter = nSpiltter; Jp]T9W\ 1D1b"o N/{?7sG& } ^
}#f() j[DIz@^ a-PGW2G public String getSSiteURL() h([0,:\ { 6E+=Xi return sSiteURL; &BgU:R, } ,P@QxnQ R;THA! JSjYC0e public void setSSiteURL(String value) q|{tQJfYg { k>{-[X,/OV sSiteURL = value; Z=9dMND } G[6=u|(M tA qs2 < l[`"0 public String getSFilePath() M {x ie { .BL:h&h|y return sFilePath; Nmf#`+7gCI } <nA3Sd"QfV AQ}l% T 46{*( public void setSFilePath(String value) V_]-`?S { :&$Xe1)i] sFilePath = value; "jGe^+9uT } tc/ jY]'32 dofR)"<p,^ Mf7E72{D public String getSFileName() ^
wQcB { Q-Y@)Mf~?0 return sFileName; \UQ],+H } @Z2/9K%1' /nM*ljfB\ 4~WlP,,M public void setSFileName(String value) Kq6qXc\x { WguV{#=H sFileName = value; 6DZ2pT: } a}D&$yz2 X,53c$ t^$Div_%G public int getNSplitter() g.&\6^)8p { SA3Y:( return nSplitter; j&}B<f _6J } ^V,@=QL3U q_58Lw 3mA/Nu_ public void setNSplitter(int nCount) MZi8Fo' { bVOO) nSplitter = nCount; *<3iEeO/R } EEg O } -AeHY'T tQnJS2V"{u F\P!NSFZV /* ke</x+\F **Utility.java |vN$"mp^a */ "j;!_v>=f` package NetFox; 73#9NZR {lKEZirO Oi#k:vq4 public class Utility { sp,(&Y]US | &\^n2`> {8i}Ow public Utility() ~pwY6Q { pb=HVjW< 6KBHRt .=aMjrME } @%7/2k X)FQ%(H< //线程睡眠 g&8 .A( public static void sleep(int nSecond) W.sD2f { ,|>nF;.Y try{ otZ JY) Thread.sleep(nSecond); m&{rBz0 } $q=hcu catch(Exception e) ^:$j:w?j { PE +qYCpP9 e.printStackTrace (); )%1&/uN) } M{y|7e%K } c'[( d5^| CTh1;U20 //日志 fY2l.H\f public static void log(String sMsg) ;W =by2x* { wf^cyCR0 System.err.println(sMsg); _4De!q0( } lHRK'?Q 0$(jBnE 4>d[qr*< public static void log(int sMsg) A'w2GC{. { 4O9tx_<JG System.err.println(sMsg); *,_2hvlz } y& Gw.N}<r } A`
oa|k!U sV;qpDXX 7YSuB9{M /* ]lC4+{V **TestMethod.java <4S F~i */ ~n)]dFy package NetFox; gS0,')w NdaM9a#TZ ">0 /8] l public class TestMethod { jR}*bIzv _qdWQFuM )Ep@$Gv|S public TestMethod() -1dIZy { ///xx/weblogic60b2_win.exe UeC 81*XZ try{ 3<yCe%I: SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); J#_\+G i //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); &7JEb]1C SiteFileFetch fileFetch = new SiteFileFetch(bean); ~p0e=u fileFetch.start(); E%KC'TN^D } 1"N/ZKF-x catch(Exception e){e.printStackTrace ();} 30:HRF(: 6!i(
\Q* h/w] } 4ZSfz#<[z K4BTk! iFXUKGiV public static void main(String[] args) 4d,qXSKty { HE4`9$kVLr new TestMethod(); qLU15cOM } Ul7,k\q@ } ||bA 点击下载更多相关资料
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