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/* -r]W **SiteFileFetch.java J)p
l|I */ q9s=~d7 package NetFox; Jij*x>K>y import java.io.*; ;vjOUn[E import java.net.*; V1B5w_^>h' p9{mS7R9T >(t6.= public class SiteFileFetch extends Thread { 89(Q1R ?: ds[| d5:c^` SiteInfoBean siteInfoBean = null; //文件信息Bean j*r{2f4Rt long[] nStartPos; //开始位置 /hyN;.hpOO long[] nEndPos; //结束位置 *VxgARIL FileSplitterFetch[] fileSplitterFetch; //子线程对象 i?^L/b`H long nFileLength; //文件长度 =U?dbSf1* boolean bFirst = true; //是否第一次取文件 j/?kL{B boolean bStop = false; //停止标志 smo~7; File tmpFile; //文件下载的临时信息 fVpMx4&F
DataOutputStream output; //输出到文件的输出流 u;2[AQ. toC^LZgZ_6 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) L)
T (< public SiteFileFetch(SiteInfoBean bean) throws IOException 9InVQCf2J { 4^|3TntO siteInfoBean = bean; svH !1b //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 'm
kLCS tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); &&>ekG9@ if(tmpFile.exists ()) /h|#J { 1=Z0w +v{ bFirst = false; 5VU2[ \ read_nPos(); Y`a3tO=Pd } {F.[&/A else ye5&)d"fa( { 9~[Y-cpoi nStartPos = new long[bean.getNSplitter()]; <h *4Q nEndPos = new long[bean.getNSplitter()]; k@W1-D? } JDT`C2-Q P@c5pc#| 61'XgkacDS 8FY?!C } 7J<5f) -e:`|(Mo P\k# >}} public void run() &^Q/,H~S { c\AfaK^KF //获得文件长度 ;u)I\3`*! //分割文件 1bX<$>x9u //实例FileSplitterFetch SO0PF|{\r //启动FileSplitterFetch线程 [` 7ThHX //等待子线程返回 20Wg=p9L try{ cyz3,3\e if(bFirst) }-=|^ { Uz]|N6` nFileLength = getFileSize(); YNi.SXH if(nFileLength == -1) vyI!]p { )\$|X}uny& System.err.println("File Length is not known!"); 97!;.f- } +52{-a,> else if(nFileLength == -2) g3y+&Y_ { oNF6<A(@$ System.err.println("File is not access!"); pFjK}JOF } *J`O"a else /9fR'EO{x { O:Tj"@h for(int i=0;i<nStartPos.length;i++) pYf-S?Y/V { Qzw;i8n{ nStartPos = (long)(i*(nFileLength/nStartPos.length)); {R`[kt } P~X2^bw for(int i=0;i<nEndPos.length-1;i++) EXqE~afm2 { }0Ed] nEndPos = nStartPos[i+1]; l+^*LqEW2 } |&i<bqLw: nEndPos[nEndPos.length-1] = nFileLength; d/~9&wLSb } _X
x/(.O } :d'8x wk_@R=*(\ `VguQl_,gA //启动子线程 b4N[)%@ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 7B66]3v for(int i=0;i<nStartPos.length;i++) '}Z<h?9 { ' S/gmn fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), fe_5LC" siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 3%b6{ie/= nStartPos,nEndPos,i); LZxNAua Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4BpZJ~(p fileSplitterFetch.start(); 7HYwLG:\~ } @f3E`8 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), :Zw2'IV siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); AH~E )S // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", R.<g3"Lm> nEndPos = " + nFileLength);
rjnrju+ // fileSplitterFetch[nPos.length-1].start(); e$Pj.>-<= mQ"-,mMI pOoEI+t //等待子线程结束 DZtsy!xA //int count = 0; _6vWF //是否结束while循环 dG ?*y boolean breakWhile = false; ]3Sp W{=^( q'Pf] =[ 7A v> while(!bStop) 8zW2zkv2|# { =41?^1\ write_nPos(); =Nr-iae# Utility.sleep(500); U 8$27jq breakWhile = true; sc#qwQ# 1 [Bk%G@D& 1T
n} for(int i=0;i<nStartPos.length;i++) ?(_08O { 'PW5ux@`< if(!fileSplitterFetch.bDownOver) ")p\q:z6 { Z6MO^_m2 breakWhile = false; !0<,@v" break; 44j*KsBf } yyTnL 2Y9 } ]u/sphPe if(breakWhile) G7/ +ogV break; 1<aP92/N& {Ou1KDy#) }3WxZv]I} //count++; 5L}/&^E#p //if(count>4) W=+ Y|R! // siteStop(); m+z&Q } =~LJ3sIX &m;*<}X Bdpy:'fJn System.err.println("文件下载结束!"); l,aay-E } V0 a3<6@4 catch(Exception e){e.printStackTrace ();} aw&,S"A@ } <qt|d& +R75v ) &_8947 //获得文件长度 T6$+hUM$1 public long getFileSize() Pr
C{'XDlU { a(ZcmYzXU int nFileLength = -1; {Qj~M<@3 try{ @BMx!r5kn URL url = new URL(siteInfoBean.getSSiteURL()); b"
[|:F>P HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); DzRFMYBR httpConnection.setRequestProperty("User-Agent","NetFox"); {?7Uj w_V P
J NDokSw- int responseCode=httpConnection.getResponseCode(); 9%obq/Lb if(responseCode>=400) \o3gKoL% { M X]n& processErrorCode(responseCode); KwVbbC3 return -2; //-2 represent access is error ?:9"X$XR } 8zq=N#x [{/jI\?v #,'kXj String sHeader; 4s
oJ.j8 *lJxH8 \ J]r^W)O for(int i=1;;i++) ?+8\.a! { uCB=u[]y4 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ;722\y(Y //Utility.log(in.readLine()); ;-Aa|aT! sHeader=httpConnection.getHeaderFieldKey(i); +1!ia] if(sHeader!=null) >+T)#.wo& { f*
wx< if(sHeader.equals("Content-Length")) fI|$K)K { p5*jzQ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); b|(:[nB break; |JsZJ9W+J } Y}KNKO; } `kSZX:=}; else &uVnZ@o42 break; RT8 ?7xFc } 5#z1bu } ZYNsHcTY catch(IOException e){e.printStackTrace ();} M
D#jj3y catch(Exception e){e.printStackTrace ();} AQ^u a$fnh3j[ #T"4RrR Utility.log(nFileLength); :Llb< MY2 3PF_H$`oJ V|R,!UND return nFileLength; \z ) %$#I } B`sAk
% %@Jsal' MnHNjsO# //保存下载信息(文件指针位置) ue>D7\8 private void write_nPos() /g.U&oI]D { .fs3>@T"# try{ cidP|ie^ output = new DataOutputStream(new FileOutputStream(tmpFile)); f%8C!W]Dm output.writeInt(nStartPos.length); y|jq?M<A for(int i=0;i<nStartPos.length;i++) 8RHUeRX { "9807OME // output.writeLong(nPos); bW:!5"_{H output.writeLong(fileSplitterFetch.nStartPos); IAyp 2 output.writeLong(fileSplitterFetch.nEndPos); MWh6]gGs } W}ofAkF output.close(); -tU'yKhn } ?&uu[y catch(IOException e){e.printStackTrace ();} Rk8P
ax/JK catch(Exception e){e.printStackTrace ();} NX&_p!_V } dQG=G%W \
6MCxh6 bhs
_9ivw //读取保存的下载信息(文件指针位置) @E8+C8' private void read_nPos() >.D4co> { [_:nHZb try{ )YI(/*+] DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); A?0Nm{O;3v int nCount = input.readInt(); O33`+UV"W nStartPos = new long[nCount]; &9>vl* nEndPos = new long[nCount]; 0IWf!Sk
] for(int i=0;i<nStartPos.length;i++) BL4-7 { _WbxH nStartPos = input.readLong(); |V7*l1 nEndPos = input.readLong(); fTX;.M/%
} :fJN->wY^s input.close(); /Gfw8g\} } q0\6F^;M catch(IOException e){e.printStackTrace ();} Zgb!E]V[ catch(Exception e){e.printStackTrace ();} P+HXn8@ } M'l ;: OB}Ib] yF/j Fn private void processErrorCode(int nErrorCode) aQI(Y^&%3 { BLJj(- System.err.println("Error Code : " + nErrorCode); wS3'?PRX } a09<!0Rp H%lVl8oQ W(/h Vt //停止文件下载 HLi%%"' public void siteStop() 7o}J%z { CTA3*Gn bStop = true; (uidNq for(int i=0;i<nStartPos.length;i++) )=-szJjXZ fileSplitterFetch.splitterStop(); q" 5(H5 S`]k>'
l a-J.B.A$Z/ } ,v}k{( 16{ } [1H^3g
' //负责部分文件的抓取 -|9=P\U8S **FileSplitterFetch.java \lNN Msd& */ M"To&?OI package NetFox; -35;j'a SZCze"`[ II=79$n`G import java.io.*; PTV:IzoW import java.net.*; eJ81-!) f`66h M[ 9(<@O%YU public class FileSplitterFetch extends Thread { z([</D? mXs; b
2r^ Mrb) String sURL; //File URL W=4FFl[ long nStartPos; //File Snippet Start Position m~ee/&T long nEndPos; //File Snippet End Position 1yY0dOoLG) int nThreadID; //Thread's ID S`Rs82> boolean bDownOver = false; //Downing is over [=`q>|;pOv boolean bStop = false; //Stop identical hK|Ul]qI FileAccessI fileAccessI = null; //File Access interface 8Xs8A. I1&aM}y{G MnW+25=N public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException k$}fWR { q-d:TMkc this.sURL = sURL; Y`wSv NU this.nStartPos = nStart; 7E!5G2XX~~ this.nEndPos = nEnd; cQ_Hp
<D nThreadID = id; "5$B>S(Q fileAccessI = new FileAccessI(sName,nStartPos);//定位 UJ6v(:z< } eb$#A _m Nmh*EAJSy B4 }bVjs public void run() hehFEyx { ^T-V^^#( while(nStartPos < nEndPos && !bStop) R0-j5&^jju { lU8Hd|@- K!l5coM a7%]Y}$ try{ |]*/R^1>2 URL url = new URL(sURL); ;i+#fQO7Q HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8DaL,bi*. httpConnection.setRequestProperty("User-Agent","NetFox"); uWE^hz" String sProperty = "bytes="+nStartPos+"-"; lks!w/yCF httpConnection.setRequestProperty("RANGE",sProperty); SMK_6?MZ Utility.log(sProperty); e\75:oQ
X)3!_ RViuJ; InputStream input = httpConnection.getInputStream(); }*"p?L^p{ //logResponseHead(httpConnection); ;gr9/Vl X!g#T9kG Uf+%W;} byte[] b = new byte[1024]; Q&bM\;Ml int nRead; y"wShAR while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Pk)1WK7E { )w%!{hn nStartPos += fileAccessI.write(b,0,nRead); R*r#E{!V; //if(nThreadID == 1) S|+o-[e8O // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); r]36zX v } k"w"hg&e JqiP>4Uwm^ jo@J}`\Zt Utility.log("Thread " + nThreadID + " is over!"); }RqK84K bDownOver = true; >[*qf9$ //nPos = fileAccessI.write (b,0,nRead); bA->{OPkT } GR32S=\ catch(Exception e){e.printStackTrace ();} [!OxZ! } |ZBI * } #Mw8^FST #>+ HlT Y:a]00&)#Y //打印回应的头信息 H7:] ]j1 public void logResponseHead(HttpURLConnection con) ]OzUGXxo~ { I,8Er2;) for(int i=1;;i++) C;urBsC { uGlUc<B\* String header=con.getHeaderFieldKey(i); q'82qY if(header!=null) HHsmLo c4 //responseHeaders.put(header,httpConnection.getHeaderField(header)); P";'jVcR Utility.log(header+" : "+con.getHeaderField(header)); 0lR5<^B else s->^=dy break; MFk5K } ^gnZ+`3 } L;I]OC^J IO-Ow! [ibu/W$ public void splitterStop() ~$?ZK]YOrx { M/gGoE{ bStop = true; d>C$+v> } w`zTR0` E^eVvP4uC@ ixD)VcD-f } CzEd8jeh7 sLAQE64\" oILZgNe' /* E~oOKQ5W **FileAccess.java Y0-n\| *//文件访问(定位,写) @I!0-OjL package NetFox; )Z9>$V$j import java.io.*; d-dEQKI?; N<injx >\3V a public class FileAccessI implements Serializable{ Q$Q([Au ,DkNLE //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 6 ~w@PRy RandomAccessFile oSavedFile; N//KPh long nPos; <GaS36ZW y_lU=(%Jd r<^HmpUJ public FileAccessI() throws IOException B_m8{44zM { >I&5j/&}+ this("",0); 81Z) eO# } ^$hH1H+V pcWPH. v^ VitLC public FileAccessI(String sName,long nPos) throws IOException :G%61x&=Zc { $ gS>FJ oSavedFile = new RandomAccessFile(sName,"rw"); }Kbb4]t|" this.nPos = nPos; B,epzI oSavedFile.seek(nPos); v
z '&%( } 0.k7oB;f(@ 7%eK37@u SKsKPqz public synchronized int write(byte[] b,int nStart,int nLen) wD'SPk5S? { Z}Ft:7 int n = -1; W v+?TEP try{ A{D];pE` oSavedFile.write(b,nStart,nLen); Fy-t T]Q9 n = nLen; HRfYl,S, } 2a Q[zK catch(IOException e) 8c^TT& { rCdu0 gYT e.printStackTrace (); b2&0Hx } vnZC,J ` RdRp.pb8 [:SWi1cK2 return n; <l E<f+ } ]|PiF+ _^%,x n]o<S+z } vT,AMja 3m!X/u \n|EM@=eE /* nk's_a*Z **SiteInfoBean.java sN01rtB(UT */ 6zuTQ^pz package NetFox; ou{2@" %^1V4 <1${1A <Wa public class SiteInfoBean { [j/9neaye N~zdWnSZ@G 0{}8( private String sSiteURL; //Site's URL aE$[52 private String sFilePath; //Saved File's Path aQ\$A`? private String sFileName; //Saved File's Name
57 private int nSplitter; //Count of Splited Downloading File [~c|mOk a'yK~;+_9 SbrecZ public SiteInfoBean() )W
_v:?A9 {//nSplitter的缺省值为5 x\G'kEd //default value of nSplitter is 5 o9yJf#-En this("","","",5); dn$!& } w-L=LWL\ PmEsN&YP] 3kp+<$ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) }Sh?S]]` { mLLDE;7|} sSiteURL= sURL; V#gK$uv sFilePath = sPath; gu.}M:u sFileName = sName; v\%HPMlh this.nSplitter = nSpiltter; B!L{ rlSeu5X6 <
!C)x } ['tY4$L( SP_75BJ ywmo#qYe public String getSSiteURL() 6HWE~`ok6 { `%"\@< return sSiteURL; #r~# I}U } `%9 uE( ShP^A"Do u.m[u)HQ public void setSSiteURL(String value) Zaf:fsj> { Gk&)08 sSiteURL = value; 6wjw ^m0 } 1FL~ndJs 2E)-M9ds ,Np0wg0 public String getSFilePath() k|PN0&J { fW1CFRHH return sFilePath; :vQrOn18p } :zke %Yx 5 ,B_u%bb i^Y+?Sx public void setSFilePath(String value) CXx*_@}MU { A>;bHf@ sFilePath = value; '"/=f\)u } !6O(-S2A .glA
gt ;)z:fToh public String getSFileName() bSi%2Onj { VSI9U3t3w return sFileName; Q%f^)HZGR } nuMD!qu!nZ g63(E,;;J XZ]uUP public void setSFileName(String value) vDhh>x( { +RM SA^ sFileName = value; i0kak`x0 } }t=!(GOb} A,Vu\3HS ub#a` public int getNSplitter() CMG&7(MR {
}Gm>`cw- return nSplitter; S8wLmd> } DIfaVo/" ^]0Pfna+N :tB1D@Cb6 public void setNSplitter(int nCount) iDz++VNV { Sc1 8dC0 nSplitter = nCount; gpvYb7Of0 } kY|utoAP } H.|#c^I (Ag16 FF(#]vz ' /* %G/hD **Utility.java /hH */ lH x^D;m6 package NetFox;
Rn(ec s_OF( o ~IfJwBn-i public class Utility { n&;85IF1 Ms5ap<q# HIR~"It$
public Utility() bz2ztH9 n { i$:*Pb3mV v6M6>&RR| Vl/+;6_ } d *|Y
o L~rBAIdD //线程睡眠 vrhT<+q public static void sleep(int nSecond) +_?hK{Ib" { 8:c-k|CX try{ ]}-7_n#cC Thread.sleep(nSecond); ?FeYN+qR } 7uS~MW catch(Exception e) 0w\zLU { U9:zVy e.printStackTrace (); ^& tZ } 9N%We|L,c } n.`($yR_ h-#6av: //日志 p$NQyS5C"S public static void log(String sMsg) hOu3 bA { :0j?oY~e System.err.println(sMsg); ,.83m%i } LqoB 10Kc\ "3)C'WlEy/ hl7bzKO*w public static void log(int sMsg) @uqd.Q { ?wiCQ6*$ System.err.println(sMsg); |+FubYf?$ } ~q@|l3?$ } 1MP~dRZ$ MSQEO4ge VgG0VM
/* /og=IF2: **TestMethod.java W#4 7h7M */ @; zl package NetFox; \=?a/ fNli \}u
Y'F public class TestMethod { 7 S#J>* UqFO|r"M ^pAAzr"hv public TestMethod() <ktrPlNuM { ///xx/weblogic60b2_win.exe 53;}Nt#R try{ xjuN- SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); d6?j`~[7#- //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ]_mb7X> SiteFileFetch fileFetch = new SiteFileFetch(bean); lk^Ol&6 fileFetch.start(); ~:rl=o } } k$z_:X catch(Exception e){e.printStackTrace ();} -[4T G\/zkrxmv Yh@JXJ> }
_JzEGpeG n71r_S* V%7WUq public static void main(String[] args) knu,"< { ?yrX)3hyH new TestMethod(); w=0(<s2 } =1FRFZI!j } 1y4|{7bb 点击下载更多相关资料
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