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/* Tvp ~~Dk **SiteFileFetch.java `Hlv*" w$ */ ZC7ZlL_ package NetFox; 0iS"V^aH import java.io.*; vs=8x\W import java.net.*; a -[:RJW !*I0}I
~ )gNS%tc*K public class SiteFileFetch extends Thread { h"#[{$( dWKjVf wE*o1. SiteInfoBean siteInfoBean = null; //文件信息Bean su2|x long[] nStartPos; //开始位置 E4}MU}C#[ long[] nEndPos; //结束位置 E^ub8 FileSplitterFetch[] fileSplitterFetch; //子线程对象 0c{-$K} long nFileLength; //文件长度 q>X30g boolean bFirst = true; //是否第一次取文件 JWB3;,S boolean bStop = false; //停止标志 AFM Ip^F File tmpFile; //文件下载的临时信息 dd?ZQ:n DataOutputStream output; //输出到文件的输出流 _P].Z8 IA6,P>}N //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) qoZUX3{ public SiteFileFetch(SiteInfoBean bean) throws IOException 6h5DvSO { 5vP=Wf cW siteInfoBean = bean; d ,"L8 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); G~.bi<(v tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); i>elK<R4 if(tmpFile.exists ()) PxAUsY { 6gy;Xg bFirst = false; ta;q{3fe read_nPos(); GkU]>8E'" } :o37 V! else itU
P% { y [jck: nStartPos = new long[bean.getNSplitter()]; !3*:6 nEndPos = new long[bean.getNSplitter()]; }c]u'a!4 } pnTuYT^%) ?z{Z!Bt?=) "aT"o tKP
zM } oS0rP'V^ _6Z}_SiOl P#j>hS
public void run() o],z/MPL { c.?+rcnq //获得文件长度 >Hd Pcsl L //分割文件 sjW;Nsp //实例FileSplitterFetch sUe<21: //启动FileSplitterFetch线程 ]r&dWF //等待子线程返回 paYvYK-K? try{ WHk rd8 if(bFirst) w~a_FGYX { iJaA&z5sr nFileLength = getFileSize(); n/
m7+=]v if(nFileLength == -1) 7eU|iDYo { nqv#?>Z^OT System.err.println("File Length is not known!"); e0e3b] } CqAv^n7 } else if(nFileLength == -2) O!3`^_. { >|W\8dTQ System.err.println("File is not access!"); .ng:Z7 } $`'%1;y@ else Ld4Jp`Zg { b%_[\(( for(int i=0;i<nStartPos.length;i++) +Rq7m] { hsJS(qEh.' nStartPos = (long)(i*(nFileLength/nStartPos.length)); X/AA8QV o } IEj=pI for(int i=0;i<nEndPos.length-1;i++) ,b${3*PPQ { n&fV^ x nEndPos = nStartPos[i+1]; <&m
`)FJ } HUWCCVn& nEndPos[nEndPos.length-1] = nFileLength; +cf. In,{ } <8sy*A?0z } Su>UXuNdE# O_^X:0} "raC?H //启动子线程 z$]HZ#aRE fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; p6*|)}T_% for(int i=0;i<nStartPos.length;i++) dk@j!-q^ { .!2Ac fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), \0bZ1" siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), mA" 82" nStartPos,nEndPos,i); JANP_b:t Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); XJ*W7HD fileSplitterFetch.start(); :ySQ[AJ" } F7N4qq1 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -guVl4 V siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Z5[f // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", %:=Jr#a nEndPos = " + nFileLength); S!{Kn ;@ // fileSplitterFetch[nPos.length-1].start(); tLc~]G*\`s jHx)q|2\ ?S0gazZm //等待子线程结束 y^tp^ //int count = 0; \?K>~{) //是否结束while循环 5Vu@gRk_ boolean breakWhile = false; a"pejW`m ffibS0aM `7o(CcF6H while(!bStop) k_A
9gj1 { kFZjMchm A write_nPos(); .#wU+t> Utility.sleep(500); Ng;Fhv+ breakWhile = true; ufc_m4PN /sa\Ze;E 0Ik}\lcn for(int i=0;i<nStartPos.length;i++) ndxijqw { =k|hH~ if(!fileSplitterFetch.bDownOver) y|O)i
I/g { P;~P:qKd breakWhile = false; Ag@R 60# break; d\{a&\v } *s}j:fJ } r<XlIi if(breakWhile) I]B[H6 break; 0ofl,mXW t^(#~hx 1Yb9ILX[J //count++; |@lVFEl] //if(count>4) $" `9QD~ // siteStop(); h6Q-+_5 } eK_Yt~dj p}{V%!`_ !tr
/$ System.err.println("文件下载结束!"); -mPrmapb3 } /`YbHYNF[ catch(Exception e){e.printStackTrace ();} 8C4=f
} O,A}p:Pgs l0g`;BI_ wG2-,\: //获得文件长度 Q{))+'s2h public long getFileSize() 'h~I#S4! { EHC^ [5 int nFileLength = -1; #{L
!o5 try{ `h+1u`FJ URL url = new URL(siteInfoBean.getSSiteURL()); u,Rhm-` HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Vo-]&u&cr
httpConnection.setRequestProperty("User-Agent","NetFox"); 4}t&AW4 v*.#LJEm DfL>fk int responseCode=httpConnection.getResponseCode(); AG==A&d>$ if(responseCode>=400)
W;9Jah. { %G>|u/:U processErrorCode(responseCode); k3FpD=N return -2; //-2 represent access is error x[i Et%_ } gbc])`aJ> 4 fxD$%9 ?=lnYD j String sHeader; ;N/=)m }^/;8cfLY -a(\(^NW for(int i=1;;i++) Z<t(h=? { fqgm`4> //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 6opubI< //Utility.log(in.readLine()); <0hJo=6a8 sHeader=httpConnection.getHeaderFieldKey(i); uY5Gn.Y if(sHeader!=null) S.kFs{;1x { dPfDPb if(sHeader.equals("Content-Length")) _-.~>C { !1M=9 ~$! nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 7L=V{,,v break; e2xqKG } bk#t+tuk } }hjJt,m else :/
yR break; 4{1.[##]o } ;PrL)! } ^"N sb & catch(IOException e){e.printStackTrace ();} 1q[vNP=g& catch(Exception e){e.printStackTrace ();} +^6v%z :i24@V~){ Mi5"XQ>/ Utility.log(nFileLength); !Ci\Zg ZdJer6:Z} ?-e'gC return nFileLength; b@&ydgmaQ } 43?J~}<Vs +J~q:b. XS'0fq a //保存下载信息(文件指针位置) D(]])4 private void write_nPos() oQvG3(. {
xedbr try{ /N>bEr4w output = new DataOutputStream(new FileOutputStream(tmpFile)); 3C8W]yw/s output.writeInt(nStartPos.length); t/baze;V for(int i=0;i<nStartPos.length;i++) m ) 2t< { &Z^,-Y // output.writeLong(nPos); {=NHidi~ output.writeLong(fileSplitterFetch.nStartPos); ,6%{9oW9Z: output.writeLong(fileSplitterFetch.nEndPos); gl4|D } Q3vWwP;t~ output.close(); %joIe w]V3 } 8;YN`S!o catch(IOException e){e.printStackTrace ();} vkXdKL(q catch(Exception e){e.printStackTrace ();} Hkv4t5F } zJfoU*G/B TZ7{cekQ t:
= //读取保存的下载信息(文件指针位置) Q.Kr;64G private void read_nPos() srN>pO8u~ { S>]Jc$ try{ cXJtNW@ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 3psCV=/z int nCount = input.readInt(); &!3=eVg nStartPos = new long[nCount]; F H'jP` nEndPos = new long[nCount]; N>fC" for(int i=0;i<nStartPos.length;i++) Cz\(.MWNZ { $UZ4,S?V nStartPos = input.readLong(); 35;)O - nEndPos = input.readLong(); gJVakR& } T1y,L<7? input.close(); "}bk
*2 } $o"PQ!z catch(IOException e){e.printStackTrace ();} ^;2dZgJ4^ catch(Exception e){e.printStackTrace ();} <N %8"o } \Mv8pU o%Lk6QA$ Z:#-4CiP private void processErrorCode(int nErrorCode) H>-?/H { C/Ig.KmXF{ System.err.println("Error Code : " + nErrorCode); ({cgak } :zC'jceO m<BL/7 _[SP*"
]H //停止文件下载 N.q4Ar[x#p public void siteStop() 1:%m
>4U { <[^nD>t_ bStop = true; d0b--v/ for(int i=0;i<nStartPos.length;i++) 2O|o%`? fileSplitterFetch.splitterStop(); FxKb )>ed6A1 [|2uu."$ } @NXGVmY1} } $J#}3;a //负责部分文件的抓取 \<VwGbzFi **FileSplitterFetch.java ?S8cl7;+ */ Y962rZ package NetFox; DU7kZ RGGP6SDc &50Kn[ import java.io.*; )S$!36Ni[ import java.net.*; E0c5c }TRr*]
P<% W|T"'M_ public class FileSplitterFetch extends Thread { .ukP)rGe H{x}gBQ 0>-l {4srs String sURL; //File URL l%"eQ long nStartPos; //File Snippet Start Position `}F=Zjy long nEndPos; //File Snippet End Position twx8TQ9 int nThreadID; //Thread's ID ij6M E6 boolean bDownOver = false; //Downing is over Y. yM 1 z boolean bStop = false; //Stop identical (J):
>\a] FileAccessI fileAccessI = null; //File Access interface BNg\;2r !&C8y oJ`ih&Q8 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `"m"qUd { gv;=Yhw.c this.sURL = sURL; ?x@B Ze this.nStartPos = nStart; ~?aq=T this.nEndPos = nEnd; M~7?m/Wj nThreadID = id; 3Fh<%<= fileAccessI = new FileAccessI(sName,nStartPos);//定位 :*1Gs, } `4Z#/g DRi!WWivn muo7KUT public void run() 1uv"5`%s { hE!3kaS while(nStartPos < nEndPos && !bStop) doXd6q4H { E8>npDFv. 3l>P>[<o IqEY.2KN try{ Tm_vo- URL url = new URL(sURL); f9D7T|J?10 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); \+v_6F httpConnection.setRequestProperty("User-Agent","NetFox"); b0E(tPw5c String sProperty = "bytes="+nStartPos+"-"; "twV3R httpConnection.setRequestProperty("RANGE",sProperty); @?K(+BGi Utility.log(sProperty); >}<:5gZtA 7%8,*T -z0,IYG } InputStream input = httpConnection.getInputStream(); [j}%&$ //logResponseHead(httpConnection); P _Zf(`jJ vsoj] R$C gSu+]N byte[] b = new byte[1024]; .gT@_.ZD9 int nRead; 8&ZUkDGkJ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) pZGso { 5cyl:1Ln nStartPos += fileAccessI.write(b,0,nRead); .4F(Y_c //if(nThreadID == 1) t2+m7*76 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); nI.#A } rN{&$+"2 #>~$`Sg h&yaug,. Utility.log("Thread " + nThreadID + " is over!"); Y*f7& '[ bDownOver = true; >K-O2dry* //nPos = fileAccessI.write (b,0,nRead); % 9BC%w]y } C-_u; NEu catch(Exception e){e.printStackTrace ();} #B'WT{B$/~ } 6!g3Juh } & 66G V85a{OBm,8 KfWVz*DC! //打印回应的头信息 |fTQ\q]W public void logResponseHead(HttpURLConnection con) r9s1\7]x { V}9wx%v for(int i=1;;i++) 4_t
aCK { Z/;rM8[{& String header=con.getHeaderFieldKey(i); wC=IN if(header!=null) -mX
_I{BJ //responseHeaders.put(header,httpConnection.getHeaderField(header)); i>,5b1x~ Utility.log(header+" : "+con.getHeaderField(header)); ]pb;q(?^ else kf-ZE$S4 break; ,[Cl 'B } D9H|]W ~ } )zUV6U7v `?=AgGg +-ieaF public void splitterStop() {Fb)Z"8] { 348Bu7': bStop = true; ,Z>Rv Ll } $!obpZ~ } T
X6Ydd W11_MTIU } >454Yir0Mk RNX}W lo-s %Si3t2W/ /* \3)%p(' **FileAccess.java gdCU1D\ *//文件访问(定位,写) VIi|:k package NetFox; Z"!C import java.io.*; k92X)/ll' SC|cCK hqi Uut,cQ". d public class FileAccessI implements Serializable{ 0^["&K/ RE"}+D //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 -'q=oTZ RandomAccessFile oSavedFile; $yCj80m\ long nPos; S~6<'N&[ UBC[5E$ ^@[[,1"K public FileAccessI() throws IOException lc5NC;JR { e2B~j3-?z this("",0); z>y,}#D?C } u5R^++ (V=lK6WQm *VRFs= public FileAccessI(String sName,long nPos) throws IOException orHVL 2
KK { Vn8Qsf1f oSavedFile = new RandomAccessFile(sName,"rw"); z6{0\#'K this.nPos = nPos; >T!n* -Zn oSavedFile.seek(nPos); {L4^IKI } P_ZguNH 'Ob5l: k8*=1kl" public synchronized int write(byte[] b,int nStart,int nLen) C)ChF`Ru': { w[|!$J? int n = -1; 1m![;Pg3 try{ 'GW@P oSavedFile.write(b,nStart,nLen); #x%O0 n = nLen; {UPIdQ'g } HQUL?URt catch(IOException e) KR522YW { Wq>j;\3b3 e.printStackTrace (); qmL!"ZRLF } uox;PDK f O(.I foJ|Q\Z,T return n; K1+,y1c } #Ta@A~.L 75v*&- `\.n_nM } P)}:lTe
j?8E >tM ]
2b@mX /* C]):+F<7 **SiteInfoBean.java Icr'l$PE */ -u9{R \S package NetFox; h|-r t15 ev@1+7( )8N/t6Q public class SiteInfoBean { @ ?%"nK 5GRN1Aov< nC*/?y*9 private String sSiteURL; //Site's URL z1:au odI@ private String sFilePath; //Saved File's Path O'mX7rY<<( private String sFileName; //Saved File's Name IM@Qe|5 private int nSplitter; //Count of Splited Downloading File LvA IAknc x)GoxH~# I7Eg$J& public SiteInfoBean() ahf$#UQLb {//nSplitter的缺省值为5 9GGBJTk- //default value of nSplitter is 5 5_i&}c23Vn this("","","",5); r%a$u%)oD } xGH%4J\ 3NJH"amk 5&xvY.!27V public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 7u}r^+6_o { XH*^#c sSiteURL= sURL; 0GG;o[< sFilePath = sPath; x
Dr^&rC sFileName = sName; EgO4:8$h this.nSplitter = nSpiltter; o^NQ]BdH8
rms&U)? [AGm%o=) } REsThB " DFg" R.fRQ>rI public String getSSiteURL() &=UzF { lWdE^- return sSiteURL; yZ P+ } :L?zk"0C 4 IHl'*D[# vSyN_ AB?$ public void setSSiteURL(String value) ae<KUThm. { &0lNj@/ sSiteURL = value; q\/|nZO4 } /bb4nM_E/ Jv?e?U B\mdOTLQ public String getSFilePath() o60wB-y { mB,7YZv return sFilePath; nxJhK
T } Vy?w,E0^: ,yT4(cMBk? WGO=@jkf public void setSFilePath(String value) WV6vM()#!C { C$hsR& sFilePath = value; <FJ#Hy+ } qzLRA.#f^ X}Csl~W8in (0][hdI~B public String getSFileName() oT_,k}L IX { OW.ckYt% return sFileName; l nZ=< T } HOw][}M_w [Cs2H8=# }FK6o
6 public void setSFileName(String value) 'D-imLV<< { UO&S6M]v7 sFileName = value; Ff,M~zn } b)V[d8IA x}roPhZ <E^:{J95 public int getNSplitter() Gg&jb= { dfrq8n] return nSplitter; x88$#N>Q5 } fT@#S}t %d>Ktf 87HVD Di public void setNSplitter(int nCount) !At _^hSqz {
s9Xeh" nSplitter = nCount; wF%XM_M } Wb|IWnH$ } vxwctJ& 7e40 }n Rub"" Ga /* /M#A[tZ3 **Utility.java [$V_qFv{ */ "16==tLFE package NetFox; F;z FKvn u'N'<(\k D8h~?phK public class Utility { "_(o% \"7 n,0}K+} l"MEX/ public Utility() Z^h4%o-l{ { 9M7{.XR, nyMA%9,B 2L,e\]2Z } @z2RMEC~ 0nl)0|?Az //线程睡眠 l&C%oW public static void sleep(int nSecond) [pOU!9v4 { Z|~<B4#c try{ p%G\5.GcJL Thread.sleep(nSecond); SKYS6b } G?[#<W@+ catch(Exception e) plp).Gq { oACE:h9U e.printStackTrace (); ?5->F/f& } S>'wb{jj! } i%z}8GIt' <(
MBs$b //日志 ly{~X public static void log(String sMsg) .AV--oA~ { hZ%Ie%~n System.err.println(sMsg); f[%iRfUFw } v=/V<3 aEgzQono HL_MuyE public static void log(int sMsg) %fxGdzu7. { @c&)K^v8 System.err.println(sMsg); TM"i9a? ; } jOe %_R } 1~_]"Y' ]{;K|rCR- Y[pGaiN: /* lk+)-J-lj' **TestMethod.java 2
OGg`1XX */ LxG :?=O. package NetFox; O[8Lp? Pl 5+Oo Bg34YmZ public class TestMethod { A]>0lB j7i[z>:Y TeG'cKz public TestMethod() mDo]5 i< { ///xx/weblogic60b2_win.exe jIEK[vJ` try{ ()P?f ed SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); VGe/;&1h //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); &yYK%~}t[ SiteFileFetch fileFetch = new SiteFileFetch(bean); 'av
OQj]`K fileFetch.start(); HeR-;L } o{:D catch(Exception e){e.printStackTrace ();} 6KV&E8Gn 9WHkw@<R+ X3q'x}{ } }G-qOt psYfz)1; rYc?y public static void main(String[] args) /LJ?JwAvg5 { bk"` hq new TestMethod(); -BB 5bsjA } :JPI#zZun } rs!J<CRq 点击下载更多相关资料
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