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/* bJ6p,]g **SiteFileFetch.java {mf.!Xev */ 7D9]R#-K package NetFox; WL:0R>0 import java.io.*; ^vM_kArA import java.net.*; SiR\a!, C \XDmK ^cn@?k((A public class SiteFileFetch extends Thread { ]!faA\1 d- kZt@DL= yV2e5/i SiteInfoBean siteInfoBean = null; //文件信息Bean | k}e&Q_/G long[] nStartPos; //开始位置 Ld~ q1*7J long[] nEndPos; //结束位置 - wWRm FileSplitterFetch[] fileSplitterFetch; //子线程对象 vpV$$=Qwp long nFileLength; //文件长度 Q.E_:=*H boolean bFirst = true; //是否第一次取文件 P5P<" boolean bStop = false; //停止标志 'kEG.Oq7 File tmpFile; //文件下载的临时信息 bvp)r[8h DataOutputStream output; //输出到文件的输出流 ]5)"gL%H` .<.#aY;N //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) cmIT$?J public SiteFileFetch(SiteInfoBean bean) throws IOException WGMb8 /{$P { s`1^*Dl%+ siteInfoBean = bean; /=/
HB //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ](nH{aY! tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); AAo0M/U' if(tmpFile.exists ()) &?r*p0MQC { p&O8qAaO bFirst = false; A Iv<f9*.: read_nPos(); QoseS/ } e96#2A5f else [zx|eG<&- { GMe0;StT nStartPos = new long[bean.getNSplitter()]; ^Et,TF\ nEndPos = new long[bean.getNSplitter()]; u GAh7Sop } A_i zSzC1 *v&*% B C=yD3mVz tUv3jq)n% } lvPpCAXY o?y"]RCM 9t0Cj/w} public void run() 3C#RjA-2[ { +N8aq<l //获得文件长度 B\/7^{i5 //分割文件 V]m^7^m3 //实例FileSplitterFetch UO1$UF!
QC //启动FileSplitterFetch线程 ]!J<,f7W //等待子线程返回 3>M.]w6{ try{ C#h76fpH if(bFirst) Pa[?L:E { C/ nFileLength = getFileSize(); D$$3fN.iEL if(nFileLength == -1) -[Y:?lA { vbedk+dd?A System.err.println("File Length is not known!"); 8m|x#*5fQl } :l;,m}#@ else if(nFileLength == -2) -F1P28<? { "vsjen.K> System.err.println("File is not access!"); ,6RQvw } /cYk+c
else :v#8O~ { 2]3G1idB for(int i=0;i<nStartPos.length;i++) hwp/jO:7\ { \QiqcD9Y nStartPos = (long)(i*(nFileLength/nStartPos.length)); 3<3t;&e } ^(J-dK for(int i=0;i<nEndPos.length-1;i++) ],Ab cTX { 6# R;HbkO nEndPos = nStartPos[i+1]; K)Ge } oW8;^u nEndPos[nEndPos.length-1] = nFileLength; g&P9UW>qS } GV=V^Fl . } eiOi3q +yvBSpY [XxA.S)x3 //启动子线程 ${e -ffyy fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; oR7 7` for(int i=0;i<nStartPos.length;i++) vRxL&8`& { noFh p fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -^0KE/ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), %$^$'6\77 nStartPos,nEndPos,i); gl Li Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :%pw`b, =V fileSplitterFetch.start(); ga,A'Z } aQC7 V !v // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3EO#EYAHiM siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 5t TLMZ `o // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", []!tT-Gzy nEndPos = " + nFileLength); N%:D8\ qx // fileSplitterFetch[nPos.length-1].start(); (]oFB$ N{|[R
!P+~c0DF //等待子线程结束 #xDDh` //int count = 0; UX03"gX
//是否结束while循环 *'s&/vEy boolean breakWhile = false; Z5 w`-# [sjrb?Xd A7mMgb_ while(!bStop) 3J23q { _ak.G= write_nPos(); /%c+
eL}l Utility.sleep(500); <1v{[F_ breakWhile = true; 'Wd3`4V$ @fUX)zm> vr5<LNCLQ for(int i=0;i<nStartPos.length;i++) @DRfNJ} { 3XM Bu* if(!fileSplitterFetch.bDownOver) f'8B[&@L { i+kFL$N breakWhile = false; "0p +SZ~D break; HE8'N=0 } *)2x&~T*| } "'Q$.sR if(breakWhile) })h'""i&xn break; `<.
7? `\4 RFr$ btJ,dpir //count++; ;))[P_$zB //if(count>4) 3uB=L7. // siteStop(); Nn~tb2\vk } My`josJ`Pb zzDNWPzsA {m1t~ S System.err.println("文件下载结束!"); `Pz!SJ| } "H/2r]?GT catch(Exception e){e.printStackTrace ();} !07FsPI#{ } BVwRPt 4DG 9`5. 3(Hj7d7'} //获得文件长度 "RR./e)h public long getFileSize() LrmtPnL { Y,<WX
v int nFileLength = -1; $Sc08ro try{ QBN=l\m+ URL url = new URL(siteInfoBean.getSSiteURL()); 3\+[38 _ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Ynk><0g6 httpConnection.setRequestProperty("User-Agent","NetFox"); dd
@COP? m,kvEQ3 ZIGbwL int responseCode=httpConnection.getResponseCode(); P5ESrZ@f if(responseCode>=400) umHs " d { Y;%R/OyWY processErrorCode(responseCode); Y`[HjS, return -2; //-2 represent access is error ,&O:/|c E } 80R=r !pFKC) Sf.8Ibw String sHeader; A+bubH, t"!8 Xoa<r9 for(int i=1;;i++) s K$Sar { S3JygN* //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); rwV u?W //Utility.log(in.readLine()); :BrnRW64 sHeader=httpConnection.getHeaderFieldKey(i);
aF4V|?+ if(sHeader!=null) .-1{,o/&Q { >x _:=%Wr+ if(sHeader.equals("Content-Length")) #/
gme { *Tlws nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); e4NX\tCpw break; EssUyF-jwU } }1^tK(Am } 2Y g[8Tm# else +XaO?F[c break; "l2N_xX; } lG^mW\O } 3
v,ae7$U& catch(IOException e){e.printStackTrace ();} e[VJ0 A= catch(Exception e){e.printStackTrace ();} ]P ?#lO6 9Av- ;!] N6 }i>";_; Utility.log(nFileLength); `'k's]Y yKk,); JcALFKLB return nFileLength; f+W[]KK*PW } /-<m(72wF vEee/+1? DuC u6j //保存下载信息(文件指针位置) J;]@?( private void write_nPos() 2*",{m { )bN3-_ try{ 0o'ML""j output = new DataOutputStream(new FileOutputStream(tmpFile)); ^} pREe c= output.writeInt(nStartPos.length); I`}vdX) for(int i=0;i<nStartPos.length;i++) /
)u,Oa { X72X:" // output.writeLong(nPos); kviSQM2 output.writeLong(fileSplitterFetch.nStartPos); fyoB]{$p8 output.writeLong(fileSplitterFetch.nEndPos); RlPByG5K } lL+^n~g output.close(); l$~bkVNL } |"E9DD]{ catch(IOException e){e.printStackTrace ();} rls#gw catch(Exception e){e.printStackTrace ();} >mDubP } 5qB=@O]|G; Ol5xyj :H8L (BsI //读取保存的下载信息(文件指针位置) ^E?V+3mV private void read_nPos() U$JIF/MO_ { Oqe.t;E 0} try{ G(3la3\( DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); DczF0Ow int nCount = input.readInt(); \osQwGPV nStartPos = new long[nCount]; h9smviU7u nEndPos = new long[nCount]; 4W-+k for(int i=0;i<nStartPos.length;i++) .`#R%4Xl { *xVAm7_v nStartPos = input.readLong(); 6zZR:ej nEndPos = input.readLong(); +\$|L+@Z } ;+KgujfU input.close(); U jzz`!mz } *pUV-^uo catch(IOException e){e.printStackTrace ();} &_hCs ho$%7mc { [t)i\ }V System.err.println("Error Code : " + nErrorCode); sBI%lrO } ?t P/VL RteTz_z{ w o9f99 //停止文件下载 =_6h{f&Q public void siteStop() 7V``f:#d { / {~h?P} bStop = true; {# _C for(int i=0;i<nStartPos.length;i++) WN1-J(x6 fileSplitterFetch.splitterStop(); -RDs{c`y%N Y &+/[[ X6
:~Rjim* } =nZd"t'p| } 8{t&8Ql n //负责部分文件的抓取 =6YO!B>7 **FileSplitterFetch.java N)Kr4GC */ a[ l5k package NetFox; H;&t"Ql. %n,bPa>T @1Lc`;Wd import java.io.*; ^uzVz1%mM import java.net.*; ;mlIWn [nD4\x+ }dl(9H=4 public class FileSplitterFetch extends Thread { j-|0&X1C 5Vqvb| 0VPa;{i/ String sURL; //File URL Ka{Zoi] long nStartPos; //File Snippet Start Position *?&O8SSBH long nEndPos; //File Snippet End Position czRh.kz, int nThreadID; //Thread's ID (B#|3o boolean bDownOver = false; //Downing is over ~T9[\nU\ boolean bStop = false; //Stop identical _"V0vV FileAccessI fileAccessI = null; //File Access interface TD7ONa-, YfKty0 `<d>C}9 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Pme?`YO$x { VRt*!v<") this.sURL = sURL; rgY~8PY" this.nStartPos = nStart; q4=RE this.nEndPos = nEnd; M czWg nThreadID = id; A[bxxQSP\H fileAccessI = new FileAccessI(sName,nStartPos);//定位 OpQa! } P0=F9`3wb YSif`W! y"ck;OQD public void run() uX[
"w| { {9MYEN}FO while(nStartPos < nEndPos && !bStop) Le!I-i(aD { T\>=o] lOui{QU }d(6N&;"zN try{ _JH6bvbQ URL url = new URL(sURL); E.9F~&DPJ< HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); sh1()vT httpConnection.setRequestProperty("User-Agent","NetFox"); 7@?b _ String sProperty = "bytes="+nStartPos+"-"; -E7\.K3 httpConnection.setRequestProperty("RANGE",sProperty); |sh U Utility.log(sProperty); uM8gfY)OI "6i9 f$N vkK+
C~" InputStream input = httpConnection.getInputStream(); _c2# //logResponseHead(httpConnection); \2jY)UrQs *)<tyIHd zBbTj IFQ byte[] b = new byte[1024]; FQyiIT6 int nRead; @j6D#./7j while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) BlUY9`VWh@ { ]Gr'Bt / nStartPos += fileAccessI.write(b,0,nRead); r!S iR( //if(nThreadID == 1) *u}):8=&R // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); mI# BQE`p6 } Li2)~4p>< N+\*:$>zt6 ( nh!tC Utility.log("Thread " + nThreadID + " is over!"); ;IT^SHym bDownOver = true; 3jNcL{ //nPos = fileAccessI.write (b,0,nRead);
-AX3Rnv^! } e([&Nr8h catch(Exception e){e.printStackTrace ();} bA)Xjq)Rr } luMNi^FQ } C\{4<:<_& 1f=L8Dr fAs:[ //打印回应的头信息 Cv| :.y
public void logResponseHead(HttpURLConnection con) vzw\f { A-W7!0
for(int i=1;;i++) 0e7!_/9 { EVf'1^f String header=con.getHeaderFieldKey(i); J.<m@\U if(header!=null) n'ro5D //responseHeaders.put(header,httpConnection.getHeaderField(header)); $?\],T Utility.log(header+" : "+con.getHeaderField(header)); P}5aN_v\ else ,w6?}
N break; gDsZbmR } #xc[)Y,W } =4zsAa !rWib`% ?o4&cCFOE public void splitterStop() UW+I 8\^ { <fw[7=_)^ bStop = true;
<ygO?m{ } J=$v+8&. te|VKYN%}[ bfJDF(=h } x!< C0N>?z lY 1m% 1)r1/0 /* Pwq}
;+ **FileAccess.java GB+G1w *//文件访问(定位,写) j.z#fU package NetFox; Xm*Dh#H import java.io.*; ;'h7
j*6 |!}$V \z_@.Jw{ public class FileAccessI implements Serializable{ 65AOFH PQfx0n, //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 0QGl'u{F RandomAccessFile oSavedFile; }LM_VZj long nPos; hE=cgO`QU GL /\uq +|}~6` public FileAccessI() throws IOException ';1
c { 9Dpmp| this("",0); cZwQ{9> } RH`m=?~J, U'\\(m| 8^^al!0K~ public FileAccessI(String sName,long nPos) throws IOException nK:39D$( { %(NRH? oSavedFile = new RandomAccessFile(sName,"rw"); nBNZ@nD this.nPos = nPos; {_
# oSavedFile.seek(nPos); eZUK<&0x5 } iBZ+gsSP _-D(N/ Oe5aNo public synchronized int write(byte[] b,int nStart,int nLen) LJBoS]~ { i P/I% D int n = -1; a#kZY7s try{ `dj/Uk oSavedFile.write(b,nStart,nLen); ^lQej% n = nLen; _]<]:b } onjTuZ^h catch(IOException e) 's
e9|: { -5Ccuk>6 e.printStackTrace (); 5B(|!Xq;I } >8RIMW2 ln3.TR* :?60pu= return n; ok7DI } (OJ}|*\ e z\;kjI YN\
QwV } QJ$]~)w?H {xOu*8J 7}nOF{RH] /* cW MZw|t **SiteInfoBean.java oiklRf */ b?r0n] package NetFox; (=p}b:Z t[#`%$%' F9d][ P@@ public class SiteInfoBean { ; I=z !'+t)h9^ FL` . (, private String sSiteURL; //Site's URL 0wOgQ n private String sFilePath; //Saved File's Path Qi[T!1 private String sFileName; //Saved File's Name U:`rNHl private int nSplitter; //Count of Splited Downloading File "+|>nA=7 d/7c#er P~?u2,.E[ public SiteInfoBean() :pNZQX {//nSplitter的缺省值为5 fF>H7 //default value of nSplitter is 5 _msDf2e9 this("","","",5); Va9vDb6 } #{N#yReh 4}8Xoywi1 :s8,i$Ex public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) h7o{l7`) { OY?uqP}c sSiteURL= sURL; mv+.5X sFilePath = sPath; !CEF@J sFileName = sName; 4,)=r3;&! this.nSplitter = nSpiltter; sX@e1*YE_ D@\97t+ }De)_E\~ } \2~.r/`1 fV[xv4D. &\1Dy}: public String getSSiteURL() Rov0 { x!G\-2# return sSiteURL; uE/qraA } b>fDb J0 4
9#I !n
!~Bw public void setSSiteURL(String value) ,m0=zH4+: { =#1/<q)L sSiteURL = value; -[+FVvS } Av/|={i 5*ABw6'6 =. OWsFv public String getSFilePath()
E?%k { M"~B_t,Nw return sFilePath; t-/%|@?D } "zm.jNn <$ '#@jW ]\Ez{MdAT public void setSFilePath(String value) ]%NCKOM { q E(`@G sFilePath = value; z#O{rwnl } Qa"R?dfr <;W4Th<4 rs\*$20 public String getSFileName() f61~%@fE { 40+E#z) return sFileName; !74*APPHR } a!wPBJJ Be?mIwc_g qOkw6jfluh public void setSFileName(String value) a'Aru^el { 8CMI\yk sFileName = value; P`RM"'Om } <o
p !dS l$PO!JRD |n Mbf public int getNSplitter() Br-bUoua {
{T.$xiR return nSplitter; [NC^v.[1[ }
c9DX At.WBa3j%{ ,ad~6.Z_) public void setNSplitter(int nCount) iSHNt0Nl { EYMwg_ nSplitter = nCount; )]rGGNF* } Jd/5Kx } )V~<8/) FL0[V, @4hxGk= /* ^8E/I]- **Utility.java awo=%vJ& */ mrk Q20D package NetFox; 6lsU/`. 9?l(
}S` #_4L/LV public class Utility {
2VMau.eQ 'U5
E{ @v@'8E Q public Utility() &<k)W { S ^2'O7uj Hq6VwQu? Hm%[d;Z7 } C[ <&%=
,_P(!7Z8 //线程睡眠 A~O
'l&KB public static void sleep(int nSecond) $kkdB,y { Pbd#Fu; try{ i8u9~F Thread.sleep(nSecond); 2 R 1S>X } R0-ARq#0< catch(Exception e) +1F@vag7 { eAm7*2 e.printStackTrace (); Sg')w1 } oKzV!~{0M; } st/Tb/ /8J2,8vZ //日志 z[IG+2 public static void log(String sMsg) K#+TCZ, {
9CUMqaY2 System.err.println(sMsg); Y13IrCA2 } G@ed2T YWd:Ok0 \1ys2BX public static void log(int sMsg) KDg!Y(m{ { oPm1`x System.err.println(sMsg); ^
chlAQz( } 9Ni$nZN } DCP" '00DUUa LTBqXh /* :,]%W $f= **TestMethod.java BYNOgB1 */ q\d'}:kfu package NetFox; }5zH3MPQH !i#;P9K O_(J',++ public class TestMethod { /HI#8 Lr40rLx;u ;y4
"wBX public TestMethod() VUagZ7p { ///xx/weblogic60b2_win.exe 'X@j try{ mZMLDs: SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 9.SPxd~
//SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); )5'S=av9 SiteFileFetch fileFetch = new SiteFileFetch(bean); &eK8v]|"W fileFetch.start(); ?6tuo:gP } ,f}s!>j catch(Exception e){e.printStackTrace ();} "1h|1'S50?
yZdM4` /$+ifiFT } 8~}Ti*Urc
7&l 19;\:tN public static void main(String[] args) qo$<&'r { `Z/"Dd;F^3 new TestMethod(); vIz~B2%x } HQv#\Xi1 } L!-T`R8'c 点击下载更多相关资料
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