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/* 0+8ThZ?n **SiteFileFetch.java p;j$i6YJ */ 0|{U"\ package NetFox; ]t1)8v2w> import java.io.*; `q e L$` import java.net.*; W.\HfJ74 ywk; Qd!;CoOmZs public class SiteFileFetch extends Thread { ,I=ClmR $X9Ban] B>o\;) l3O SiteInfoBean siteInfoBean = null; //文件信息Bean vD) LRO
Z long[] nStartPos; //开始位置 v%&f00 long[] nEndPos; //结束位置 1q~U3'l:$ FileSplitterFetch[] fileSplitterFetch; //子线程对象 !j4C:L3F long nFileLength; //文件长度 .,,?[TI boolean bFirst = true; //是否第一次取文件 5%?La`C9[ boolean bStop = false; //停止标志 Sct-,K%i File tmpFile; //文件下载的临时信息 Vw9^otJu DataOutputStream output; //输出到文件的输出流 N>Y`>5 Dt1{]~30 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) f\~e&`PV public SiteFileFetch(SiteInfoBean bean) throws IOException v5wI?HE { @D"#B@j siteInfoBean = bean; q) /;|h //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); %8$JL=c tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ^i-%FY_i5} if(tmpFile.exists ()) yL.si)h(p { 'A!Dg bFirst = false; uA!T@>vl read_nPos(); B0 q![ } 8t}=?:B+{ else ^Sy\< { l$,l3 nStartPos = new long[bean.getNSplitter()]; 2t[c^J nEndPos = new long[bean.getNSplitter()]; y%TR2CvT } Jkm\{; <l wI| < q9WdJ!-^X RO wbzA)]r } l,*Q?q >Fx$Rty <
q;] public void run() bq[Q { /gy;~eB01 //获得文件长度 o;];ng //分割文件 r.i.w0B( //实例FileSplitterFetch L{^DZg|E //启动FileSplitterFetch线程 pJa FPO..| //等待子线程返回 &%qD Som3 try{ e,~c~Db*
Q if(bFirst) o,\%c"mC { #yr19i ? nFileLength = getFileSize();
|J(] if(nFileLength == -1) ;S`N q%, { CM5A-R90 System.err.println("File Length is not known!"); A$XjzTR } 2z0HB+Y}x else if(nFileLength == -2) (m04Z2# { &p;};n System.err.println("File is not access!"); jcq(=7j } :jp?FF^j; else 82J0t}:U { '12|:t&7 for(int i=0;i<nStartPos.length;i++) #Z$6>
Xt { & p_;&P_ nStartPos = (long)(i*(nFileLength/nStartPos.length)); ` V^#Sb } i $I|JJJ for(int i=0;i<nEndPos.length-1;i++) :-"J)^V { sWavxh8A nEndPos = nStartPos[i+1]; ziH2<@ } MqoQs{x nEndPos[nEndPos.length-1] = nFileLength; E=QL4*?
} m\Tq0cT$ } $d8A_CUU &g& &-=7) 4`8.\ //启动子线程 ?sS'T7r
v fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; -S,dG| for(int i=0;i<nStartPos.length;i++) ]LSa(7>EU { hq,;H40%/ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), [tD*\\IA siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), iBo-ANnK9 nStartPos,nEndPos,i); 5\4>H6 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); o~4n8 fileSplitterFetch.start(); !zJ.rYZ=g` } ~-:CN(U // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), rM=Hd/ki5 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); {eZj[*P // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", #[KwR\b{:+ nEndPos = " + nFileLength); ok6e=c ' // fileSplitterFetch[nPos.length-1].start(); :T{or- 8dA/dMQ GrQl3 Xi //等待子线程结束 8V|-BP5^ //int count = 0; zfo.S[R@ //是否结束while循环 <M&]*|q>g% boolean breakWhile = false; n/|/Womr epG;=\f}m` R3@iN& while(!bStop) ^U`q1Pg5 { <=7)t. write_nPos(); ~IqT> Utility.sleep(500); s lI)"+6 breakWhile = true; &pba~X.u rSJ}qRXwU =VY4y]V for(int i=0;i<nStartPos.length;i++) {VNeh { Aj`4uFhiL if(!fileSplitterFetch.bDownOver) C|lMXp\* { AQV3ZVP breakWhile = false; ncA2en? break; y]CJOC)/K } M^[jA](a } nb|MHt PX if(breakWhile) `nM4kt7 break; hy]AH)?pR fZ376Z:S$ 0[i]PgIH
//count++; ]Aluk|"`U //if(count>4) z::2O/ho // siteStop(); C=b5[, UCB } C {,d4KG (i?^g & (,TO| System.err.println("文件下载结束!"); f7W=x6Z4 } 3PEs$m9e catch(Exception e){e.printStackTrace ();} *AA1e}R{B } #rC/y0niH \bsm#vY, vOj$-A--qU //获得文件长度 d{trO;%#f public long getFileSize() dog,vUu { 7,4x7! int nFileLength = -1; :_H88/?RR try{ *&PgDAQ URL url = new URL(siteInfoBean.getSSiteURL()); UetmO`qju HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); zSH#j RDV httpConnection.setRequestProperty("User-Agent","NetFox"); x!jhWX Lf:Z
(Z> b7,qzh int responseCode=httpConnection.getResponseCode(); a;zcAeX if(responseCode>=400) avz 4& { 8`~]9ej processErrorCode(responseCode); Tc*PDt0C return -2; //-2 represent access is error k^]~NP } ;i:7E#@ '
#mC4\<W8 ,-"]IR!,w String sHeader; }* t~&l0 cs5Xd lm\u(3_$ for(int i=1;;i++) 19vD(KC< { 4<Y?#bm' //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); gf=*m"5 //Utility.log(in.readLine()); Pn#Lymxh_a sHeader=httpConnection.getHeaderFieldKey(i); QezK&iJg if(sHeader!=null) ?l (hS\N, { Q4PXC$u if(sHeader.equals("Content-Length")) Cf N; ` { <>Im$N ai nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); &Xav$6+Z1J break; Ll`apKr } $d=lDN } 5eLPn else 5 9vGLN!L break; # 9t/j`{ } FdqUv%(Em } 8xX{y# catch(IOException e){e.printStackTrace ();} HHYcFoJwYN catch(Exception e){e.printStackTrace ();} Kv7NCpq' O?!"15 pDLo`F}A Utility.log(nFileLength); @RP|?Xc{? smU+:~ z)B=<4r return nFileLength; >gE_?%a[ } 'nno)kQ" x,%&[6( Qi61(lK //保存下载信息(文件指针位置) 3C2> private void write_nPos() [ZbK)L+_ { &)l:m. try{ i&$uG[&P output = new DataOutputStream(new FileOutputStream(tmpFile)); #o RUH8 output.writeInt(nStartPos.length); ;D1IhDC for(int i=0;i<nStartPos.length;i++) +\%zy= { f/x "yUq // output.writeLong(nPos); 1 W u output.writeLong(fileSplitterFetch.nStartPos); SMyg=B\x?7 output.writeLong(fileSplitterFetch.nEndPos); 1dcy+ !> } 2&m7pcls output.close(); L7- nPH } nM`) `!/ catch(IOException e){e.printStackTrace ();} -ZB"Yg$l catch(Exception e){e.printStackTrace ();} Exr7vL } "->:6Oe2 B(falmXJ ||V:',#,W //读取保存的下载信息(文件指针位置) X3[!xMij private void read_nPos() :dzU]pk%0 { +0 MKh try{ Sx2j~(pOr DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); hqPn~Tq int nCount = input.readInt(); q*OKA5 nStartPos = new long[nCount]; g$b*# nEndPos = new long[nCount]; .IXwa, for(int i=0;i<nStartPos.length;i++) pA'A<|)K0 { 4_<Uk nStartPos = input.readLong(); * 5n:+Tw( nEndPos = input.readLong(); qpl5n'qHUc } p2G8Qls input.close(); Ub,unU } "}! rM6 h catch(IOException e){e.printStackTrace ();} {76! catch(Exception e){e.printStackTrace ();} R=PzR;8 } ^ne8~
;Q 7,TWCVap MlFvDy private void processErrorCode(int nErrorCode) jGn^<T\ { Qx;A; n!lw System.err.println("Error Code : " + nErrorCode); 7o. 'F } 3U)8P6Fz }El_.@'T & !U_L7 //停止文件下载 cy 4'q?r public void siteStop() Pc'?p { &pm{7nH bStop = true; ` qTY for(int i=0;i<nStartPos.length;i++) TeJ
`sJ fileSplitterFetch.splitterStop(); iC]lO w>uZ$/ OX4D' } )*ckJK } B! V{.p //负责部分文件的抓取 Q\L5ZJ%y/ **FileSplitterFetch.java Br5Io=/wg */ ak`)> package NetFox; gf?^yP ;V wVDB?gy%# : qRT9n$ import java.io.*; keskD import java.net.*; NrcCUZ .:N @'@6vC SWpUVZyd public class FileSplitterFetch extends Thread { Tm\[q OU@x1G{Cy dH|^\IQ String sURL; //File URL e-9unnk long nStartPos; //File Snippet Start Position x[UO1% _o- long nEndPos; //File Snippet End Position <q2nZI^ int nThreadID; //Thread's ID <R>z;2c boolean bDownOver = false; //Downing is over 070IBAk}_ boolean bStop = false; //Stop identical *K'ej4"u FileAccessI fileAccessI = null; //File Access interface P*`xiTA /Ph&:n\4 "Q{~Bj~ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 4/?}xD|? { 1 ],,
Ar5 this.sURL = sURL; 4Z9wzQ> this.nStartPos = nStart; ~+C?][T this.nEndPos = nEnd; 8"mW!M nThreadID = id; f<Tz#w&6W fileAccessI = new FileAccessI(sName,nStartPos);//定位 a
+yI2s4Z } !m(L0YH ;bZ*6-\!- 1Uk~m public void run() vN:[ { )C]&ui~1 while(nStartPos < nEndPos && !bStop) *Ne&SXg { ROS"VV< g ypq`F [P=[hj; try{ o!`O
i5 URL url = new URL(sURL); ^85n9a?8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8zDH<Gb httpConnection.setRequestProperty("User-Agent","NetFox"); {$YD-bqY String sProperty = "bytes="+nStartPos+"-"; x ;,xd httpConnection.setRequestProperty("RANGE",sProperty); FLI8r: Utility.log(sProperty); v9m;vWp +\GZ(!~ WwtE=od InputStream input = httpConnection.getInputStream(); yr2L //logResponseHead(httpConnection); 2BX GVo f&|A[i>g QhQ"OVFr# byte[] b = new byte[1024]; !]+Z%ed`% int nRead; 5!jNL~M while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 6F.7Ws< { 6h6?BQSE nStartPos += fileAccessI.write(b,0,nRead); wZ8 MhE //if(nThreadID == 1) .*-w UBr // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); B36puz 0{ } OP`Jc$|6 'z}M[h
K] e ]o'i;I Utility.log("Thread " + nThreadID + " is over!"); =yX&p:-& bDownOver = true; igBrmaY' //nPos = fileAccessI.write (b,0,nRead); o 7W Kh= } 4:&qTY)H catch(Exception e){e.printStackTrace ();} #z!Hb&Qi\ } RB7AI!'a? } yISQYvSN )|y2Q L'XdX\5 //打印回应的头信息 |F@xwfgb public void logResponseHead(HttpURLConnection con) xX/s1(P { IAF;mv}' for(int i=1;;i++) Secq^#]8 { M'zS7=F!: String header=con.getHeaderFieldKey(i); 5 k%9>U%$ if(header!=null) S=H_9io //responseHeaders.put(header,httpConnection.getHeaderField(header)); =lC;^&D-0/ Utility.log(header+" : "+con.getHeaderField(header)); hMeqs+ else w zqd
g break; 1i /::4= } nt0\q'& } )R8%'X;U #3K,V8(
$.Q>M]xH public void splitterStop() R G0S { Afy .3T @) bStop = true; VkDS&g~Ws } (y~laW! MATgJ`lsy !3I(4?G, } daB l%a= mPfUJ#rS 1%spzkE 3P /* 6UW:l|}4#2 **FileAccess.java 9Ue7
~"= *//文件访问(定位,写) S2&9#6 package NetFox; %8bzs?QI import java.io.*; +an^e' ^{*f3m/ )nNCB=YF! public class FileAccessI implements Serializable{ z_Wm
HB Yn4)Zhkk //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ,<$YVXe/ RandomAccessFile oSavedFile; n{^<&GWox long nPos; (7;J"2M q11QAx4p uKbHFF public FileAccessI() throws IOException @q+cmJKv { j&dx[4|m:h this("",0); *
{gxI< } J0Hm)* )
\-96 xd cophAP public FileAccessI(String sName,long nPos) throws IOException G(As%r] { GG_^K#* oSavedFile = new RandomAccessFile(sName,"rw");
,v*p this.nPos = nPos; *Mwfod oSavedFile.seek(nPos); #dZ/UM(u } M'umoZmW0 QJ#u[hsMFp &nqdl+|G* public synchronized int write(byte[] b,int nStart,int nLen) uNe}"hs { qDRNtFa int n = -1; \D,M2vC~G try{ )X~Pr?52? oSavedFile.write(b,nStart,nLen); =a)iVXSB] n = nLen; Gefnk!;; } _Z+jQFKJ\8 catch(IOException e) \Pl,'
1% { hdd>&?p3 e.printStackTrace (); }XCR+uAz } S5~`T7Ra ,!6M*| R:w%2Y return n; ImWXzg3@{ } EO#gUv Fn86E dFM d7"U WY^ } Ecxj9h,S {sC@N![ T-9k<,>? /* |N:MZ#}; **SiteInfoBean.java dD/t_ {h */ {*QvC
g? package NetFox; T?X^0UdJj $%g\YdC %Kh2E2Pe public class SiteInfoBean { pi`;I*f/ ~`t%M?l qyg*n>nt private String sSiteURL; //Site's URL atY*8I| private String sFilePath; //Saved File's Path K??1,I private String sFileName; //Saved File's Name ~ HK1X private int nSplitter; //Count of Splited Downloading File ]alh_U [_WI8~gY g4N%PV8 public SiteInfoBean() jHAWK9fa {//nSplitter的缺省值为5 s$DGd
T) //default value of nSplitter is 5 i2$*}Cu this("","","",5); NW{y%Z } 6Z~Ya\~.g. .zvlRt.zl f.||PH public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) LthGZ|> { Dd| "iA sSiteURL= sURL; +0]'| t F> sFilePath = sPath; g<fDY6jt sFileName = sName; WP5VcBC this.nSplitter = nSpiltter; `Kh]x9Z tM&n3MWQ \n#]%X5c } Hqvc7 -c6 QU:EY'2 pT4qPta,2 public String getSSiteURL() Ptx,2e&Hq { [%)@|^hw91 return sSiteURL; * [tc } 6|,e% i90}Xyt @l'G[jN5 public void setSSiteURL(String value) bE?'C h { UqN{JG:#. sSiteURL = value; 0$tjNye } qAqoZMpI|; R'zu"I \e<mSR public String getSFilePath() T^~)jpkw { <eY%sFq, return sFilePath; 75ZH } B&?fM~J H+a~o=/cR k({2yc#RD& public void setSFilePath(String value) q( IZJGb { m}98bw sFilePath = value;
rFo\+// } }sv!=^}BY3 h40'@u^W a mqOxb public String getSFileName() CWs: l3_yn { ;)?( 2
wP return sFileName; BDy5J2<<7l } tQrS3Hz'nA .`,F Uo2+:p public void setSFileName(String value) Vvyj { MM#i t=u sFileName = value; mzGjRl=O } 1?(cmXj *(G&B\ ahA{B1M)n public int getNSplitter() 7{pIPmJ { 7rcA[)<' return nSplitter; ^ Hg/P8q } eIg+PuQD] f])M04< NPm; public void setNSplitter(int nCount) f ba&` { T"?Y5t`( nSplitter = nCount; jv =EheD } !EOQhh } .s2$al G}VDEC o@9+mM"B) /* g:_hj_1Y M **Utility.java ;1 |x */ ~^&R#4J package NetFox; II;Te7~ ~.Cv
DJy f2yq8/J8. public class Utility { 9_ZBV{
yHNuU)Ft ,}0$Tv\1 public Utility() ]]TqP{H { xvmt.> f R,Fgl2 %X>FVlPm } gO='A(Y WULAty //线程睡眠 =A@>I0(7 public static void sleep(int nSecond) qZ*f%L( { ~U$":~H[ try{ )JhT1j Qc Thread.sleep(nSecond); -#.< 12M } d
yh<pX/$ catch(Exception e) :g2
}C { (wuaxo: e.printStackTrace (); 7?J3ci\ } byGn,m } qsI^oBD" QXVC\@ //日志 nBz`q+V public static void log(String sMsg) +j{Y,t{4 { eY,O@'"8` System.err.println(sMsg); BLn_u,3 } $.rzc]s R,t$"bOd M0L&~p_F public static void log(int sMsg) %2"J:0j { |sIr?RL{C System.err.println(sMsg); c~imE% } PLA#!$c7q } _c2WqQ-05 `G!M>h@ j*400 /* *fnvZw? **TestMethod.java $dQIs: */ mR%FqaN_ package NetFox; }D*yr3b T\9~<"P^ :,S98z# public class TestMethod { z.oU4c .[:VSM7T 8{0k0 &x public TestMethod() W:`#% :C { ///xx/weblogic60b2_win.exe @gY\;[#. try{ tY+$$GSQj SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); hmC*^"C>U= //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); lnh+a7a) SiteFileFetch fileFetch = new SiteFileFetch(bean); 'yY>as fileFetch.start(); '<dgT&8C } R)5n 8 catch(Exception e){e.printStackTrace ();} .Z\Q4x#!Z YoKs:e2/: $q_R?Eay } %m&@o~+ "OmD@
EMT MHi8E9_O public static void main(String[] args) )Si2u5 { Ps4 ZFX new TestMethod(); wN=;i# } S($Su7g%_ } 0 1V^L} 点击下载更多相关资料
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