-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* 5?SE?VC=t **SiteFileFetch.java syW[uXNLZ */ x5uz$g package NetFox; xOKJOl import java.io.*; Z9$pY=8^? import java.net.*; @2h hB W >IrQhSF
7;q0'_G public class SiteFileFetch extends Thread { aOGoJCt
C >W] Wc4\ F\xIVY SiteInfoBean siteInfoBean = null; //文件信息Bean S1Y,5,} long[] nStartPos; //开始位置 H 4ELIF#@ long[] nEndPos; //结束位置 fYy w2" FileSplitterFetch[] fileSplitterFetch; //子线程对象 'RKpMdoz long nFileLength; //文件长度 ,]wQ]fpt boolean bFirst = true; //是否第一次取文件 lwX9:[Z boolean bStop = false; //停止标志 !9PAfi? File tmpFile; //文件下载的临时信息 / ^d9At614 DataOutputStream output; //输出到文件的输出流 ^6kl4:{idE "zJ xWXI //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) k1xx>=md|C public SiteFileFetch(SiteInfoBean bean) throws IOException 1a(\F7 { j%
7Gje[ siteInfoBean = bean; lqOpADLS3 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath()));
E/oLE^yL tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ME]4tu if(tmpFile.exists ()) onSt%5{P%X { eUQmW^
bFirst = false; ,4xNW:!j read_nPos(); ,Ohhl`q( } ,\"x#Cc f else V[kJ;YLPN { 1/?Wa nStartPos = new long[bean.getNSplitter()]; vc|tp_M67 nEndPos = new long[bean.getNSplitter()]; #oTVfY# } g]L8Jli ,H"}Rw 1q!k#Cliu a%m
)8N;C } 5*Zz_ . ffL]_E )yb~ kbe public void run() 59D'*!l- { !Z2h?..O //获得文件长度 A4@z+ebb l //分割文件 zqdkt ` //实例FileSplitterFetch ty['yV-;a //启动FileSplitterFetch线程 h SS9mQ //等待子线程返回 dNf9,P_} try{ +BtLd+)R if(bFirst) .jqil0#)Y" { jc_k\ nFileLength = getFileSize(); /r'Fq
=z if(nFileLength == -1) Z72%Bv { c!6v-2ykv System.err.println("File Length is not known!"); bS8$[7OhX } 7=fNvES2 else if(nFileLength == -2) xI?'Nh { TDR|*Cs System.err.println("File is not access!"); Q3l>xh } V)~b+D else Z1q<) O1QX { !%t@wQ]\hG for(int i=0;i<nStartPos.length;i++) =p[Sd*d { %IVM1 nStartPos = (long)(i*(nFileLength/nStartPos.length)); paV1o>_Rd } b*h:e.q for(int i=0;i<nEndPos.length-1;i++) GOdWc9Ta! { 2( GYk nEndPos = nStartPos[i+1]; yxu7YGp% } |khFQ( nEndPos[nEndPos.length-1] = nFileLength; +0[H`5-^ } 9'H:pb2 } XkqsL0\ G2wSd'n*y 0N!rIz //启动子线程 t&43)TPb. fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; U`~L}w" for(int i=0;i<nStartPos.length;i++) Pl'lmUR { h~sTi fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), o<48' >[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), J#wf`VR% nStartPos,nEndPos,i); bz nMD Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9s5s;ntz" fileSplitterFetch.start(); ck
`td% } YR\(*LJL // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), sqhIKw@ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 63\
CE_p // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", j-J/yhWO& nEndPos = " + nFileLength); Bj6%mI42hl // fileSplitterFetch[nPos.length-1].start();
z [[qrR aj1g9y <e
9d5-2 //等待子线程结束 [Y`E"1f2 //int count = 0; lQ^"-zO4 //是否结束while循环 *N
~'0"# boolean breakWhile = false; ~u0<c:C^ /<T{g0s VSUWX1k4% while(!bStop) gA EB { w$&;s<0 write_nPos(); Es}`SIe/ Utility.sleep(500); H'$H@Kn]- breakWhile = true; E]vox~xK> S3HyB
b :_HdOm for(int i=0;i<nStartPos.length;i++) "\+\,C { -XnIDXM if(!fileSplitterFetch.bDownOver) &$T7eOiZ { X^&--@l}T! breakWhile = false; f\$_^dV break; cY!Pv } HI:1Voy }
N6BOUU] if(breakWhile) 45-x$o break; W+GBSl =`(W^&| P(b~3NB) //count++; >f&L7@ //if(count>4) ;=P!fvHk // siteStop(); w?"M } (O!CHN!: g*_n|7pB }vP(SF6 System.err.println("文件下载结束!"); >@G"*le*) } y~OP9Tg catch(Exception e){e.printStackTrace ();} t}}Ti$$> } \O~/^ Y3U! 73u97oe>1 mcQ
A' //获得文件长度 }3WP:Et public long getFileSize() Jc]k\U { SCn)j:gH; int nFileLength = -1; Vy/G-IASb try{ $mAyM+ ph[ URL url = new URL(siteInfoBean.getSSiteURL()); dqBN_P% HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /9SoVU8 httpConnection.setRequestProperty("User-Agent","NetFox"); 'bH~KK5 8yOhKEPX TntTR"6aD int responseCode=httpConnection.getResponseCode(); ZjY?T)WE9 if(responseCode>=400) z^9rM" { XLYGhM processErrorCode(responseCode); >ZgV8X: return -2; //-2 represent access is error X<W${L$G } b
~]v'|5[ G[`2Nd< PD^ 6Ywn>s String sHeader; eq"Xwq* vqoK9 Ur1kb{i for(int i=1;;i++) }{PG^ Fc<P { T#Bj5H //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); G"L`9E<0V //Utility.log(in.readLine()); 3,hu3"@k sHeader=httpConnection.getHeaderFieldKey(i); |eye) E: if(sHeader!=null) g^po$%I ' { :YX5%6 if(sHeader.equals("Content-Length")) OM7AK
B=S { fV6ddh nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 7#Fcn break; e=#D1 } 2*gB ~Jn4 } p,(W?.ZDN? else ]i1OssV~> break; yP` K [/ } FH%:NO } M djxTr^ catch(IOException e){e.printStackTrace ();} N<KsQsy= catch(Exception e){e.printStackTrace ();} bQN3\mvY )L":I
noB8*n0 Utility.log(nFileLength); I+3=|Vef fX\y/C e:N;Jx# return nFileLength; |RXXj [z } b>#dMRK ApggTzh@ Y>8JHoV //保存下载信息(文件指针位置) eqOT@~H private void write_nPos() TB<$9FCHK { 9R-2\D] try{ "8a ?KQ output = new DataOutputStream(new FileOutputStream(tmpFile)); <wd;W;B output.writeInt(nStartPos.length); ?} E
M, for(int i=0;i<nStartPos.length;i++) -i91nMi] { #Lk~{ // output.writeLong(nPos); 33~8@]b output.writeLong(fileSplitterFetch.nStartPos); z'O+B} output.writeLong(fileSplitterFetch.nEndPos); at\u7>;.^k } ]j*uD317 output.close(); :7Uv)@iUk } '<e$ c catch(IOException e){e.printStackTrace ();} 4}*.0'Hz catch(Exception e){e.printStackTrace ();} vwa*'C } j`Ek : W|sU[dxZ (?GW/pLK] //读取保存的下载信息(文件指针位置) 1BP/,d |+ private void read_nPos() S$40nM { #_IuB) qy try{ {+Wknm% DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); oxI?7dy5 int nCount = input.readInt(); el2<W=^M nStartPos = new long[nCount]; &U([Wd?E2 nEndPos = new long[nCount]; BbL]0i for(int i=0;i<nStartPos.length;i++) =CdrhP_ { 6p&uifY}tR nStartPos = input.readLong(); >b:5&s\9 nEndPos = input.readLong(); *c$UIg } ,S`FxJcE input.close(); AG;KXL[V } Fs =)*6}& catch(IOException e){e.printStackTrace ();} X68.*VHh0 catch(Exception e){e.printStackTrace ();} 23'{{@30 } FKhgUnw %z.d;[Hs im)r4={
9 private void processErrorCode(int nErrorCode) P{J9#.Zq&s { /3sX>Rj System.err.println("Error Code : " + nErrorCode); '0o^T 7C } t0/Ol'kgs 6iHY{WcDj -Oz! GX //停止文件下载 Cy5iEI# public void siteStop() {utnbtmu { hl)jE
06 bStop = true; uc]5p(9Hb for(int i=0;i<nStartPos.length;i++) _[l&{, fileSplitterFetch.splitterStop(); Z>X]'q03 uz20pun4B z_A\\ } bTAY5\wB } ,C_MB1u //负责部分文件的抓取 ,K30.E **FileSplitterFetch.java w?M"`O( */ &5B/>ag1! package NetFox; Are0Nj&? (wxi! n!Y}D:6c6 import java.io.*; xbHI4A"Z import java.net.*; hKnV=Ha( !tx.2m*5 mjk<FXW public class FileSplitterFetch extends Thread { ![]6| G& bwszfPM 4/ q
BD String sURL; //File URL +Oo-8f* long nStartPos; //File Snippet Start Position ;'[?H0Jw' long nEndPos; //File Snippet End Position y~M6 int nThreadID; //Thread's ID %t74*cX boolean bDownOver = false; //Downing is over M[-/ &;`f@ boolean bStop = false; //Stop identical fwUF5Y FileAccessI fileAccessI = null; //File Access interface $DnR[V}rR! `/i/AZ{ ^AXH}g public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 1L?W+zMO { 8A-*MU`+ this.sURL = sURL; vv5rA 6+ this.nStartPos = nStart; J^PFhu this.nEndPos = nEnd; R;&k/v nThreadID = id; _oefp*iWS fileAccessI = new FileAccessI(sName,nStartPos);//定位 7 ,uD7R_ } *UG?I|l|I $kkL)O*"] lKqFuLHwF public void run() 4&:|h 1 { =n@\m< while(nStartPos < nEndPos && !bStop) *7L1SjZw { G"Ey%Q2K ]xJ.OUJy /,$V/q+ try{ +<B"g{dLuX URL url = new URL(sURL); 4((p?jbC HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); :gRVa=}= httpConnection.setRequestProperty("User-Agent","NetFox"); N\?__WlBK7 String sProperty = "bytes="+nStartPos+"-"; 0Xn,q]@Z httpConnection.setRequestProperty("RANGE",sProperty); {CTJX2& Utility.log(sProperty); ^bdXzjf i`iR7UmHeR j*GS')Cm InputStream input = httpConnection.getInputStream(); |}X[Yg=FG //logResponseHead(httpConnection); ;.R)
uCd{= WK#%G 9gIim byte[] b = new byte[1024]; /{I-gjovy int nRead; E4_,EeC# while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) cw0uLMqr` { K]dR%j nStartPos += fileAccessI.write(b,0,nRead); :TV`uUE //if(nThreadID == 1) z|(<Co8#. // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :vaVghN\ } yi(IIW EEx:Xk%5hX ztp2j%' Utility.log("Thread " + nThreadID + " is over!"); 5HY0 *\ bDownOver = true; g-m,n=qu //nPos = fileAccessI.write (b,0,nRead); 0]nveC$ } ? 5OK4cR catch(Exception e){e.printStackTrace ();} yGX5\PSo } VT#`l0I} } >S{8sN NJQy*~P 2zX9c<S=5 //打印回应的头信息 5EECr
\* public void logResponseHead(HttpURLConnection con) P{StF`>Y { w:R#F(
'B for(int i=1;;i++) FNo.#Z5+b { n(SeJk%>9 String header=con.getHeaderFieldKey(i); m6gMVon if(header!=null) zzd PR}VG //responseHeaders.put(header,httpConnection.getHeaderField(header)); gp'k(rGH Utility.log(header+" : "+con.getHeaderField(header)); )6o%6$c else wuSotbc/ break; 6/"#pe^ } `/B+ } z+zEH9.' J*Cf1 D5! H"?Ndl: public void splitterStop() VG50n<m9 { ~K(mt0T) bStop = true; 2j]uB0 } $Ny: At WfTl\Dxw dqFp"Xe"% } .CW,Td3f! *|;`Gp 0c,!<\B /* @V^5_K **FileAccess.java 2a 7"~z~ *//文件访问(定位,写) /^X)>1)j package NetFox; -%V~1 import java.io.*; <B @z>V PO:sF]5 N]\)Ok public class FileAccessI implements Serializable{ r!|h3*YA Ip *8R]W //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Ev3,p`zS._ RandomAccessFile oSavedFile; 7m:TY>{ long nPos; {7_C|z:'p& &78lep -uhVw_qq# public FileAccessI() throws IOException .VohW=D3 { |M18/{ this("",0); =hI;5KF } TS=U%)Ik ;sx4w!Y, 7E5=Qx public FileAccessI(String sName,long nPos) throws IOException \i<7Lk { v(,
tu/ oSavedFile = new RandomAccessFile(sName,"rw"); R+.kwq3CED this.nPos = nPos; pA_e{P/ oSavedFile.seek(nPos); 2|NQ5OA0 } 6(ER$ k(@W
z>aCv OgHqF,0MN public synchronized int write(byte[] b,int nStart,int nLen) ]M~7L[ { u0qTP] int n = -1; ] 8<`&~a try{ -av=5hm oSavedFile.write(b,nStart,nLen); ^}J,;Zhu5 n = nLen; .;(a;f+{; } 19%zcYTe catch(IOException e) C3
BoH& { d vo|9 > e.printStackTrace (); lB!M;2^)X } gQ<{NQMzvd bh3yH>Zns wT-Kg=-q return n; 0}'/3Q } K%u>'W v`p@djM +Z]}ce
u" } DUg[L w>'3}o(nY `91Z]zGpU /* 7Rc>LI*
' **SiteInfoBean.java 6:Y2z!MLO */ D'^UZZlI^I package NetFox; #Kx @:I GXRW"4eF5 |C0!mU public class SiteInfoBean { bik lja aadw#90 V0%a/Hi v
private String sSiteURL; //Site's URL J5z\e@?.0\ private String sFilePath; //Saved File's Path >X=V Ph8 private String sFileName; //Saved File's Name vZ^U]h V private int nSplitter; //Count of Splited Downloading File 7 ;2>kgf~ $6 4{Ff 0w vAtK|Q public SiteInfoBean() *&V"x=ba, {//nSplitter的缺省值为5 cyh;1Q //default value of nSplitter is 5 ,-DU)&dF this("","","",5); !\'HKk~V } xl,6O!aR j zwHb'4B3 lAGntYv public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) +x~p&,w? { 0oqOX sSiteURL= sURL; vJsg6oH sFilePath = sPath; 9hJ
a K sFileName = sName; ZkNet>9 this.nSplitter = nSpiltter; =-qYp0sVP $if(n|| k?1e+ \ } y'z9Ya _94R8?\_V7 w$""])o, public String getSSiteURL() o"kL,& { _lC0XDZ return sSiteURL; "{c@}~ } CioS}K -"XHN=H ]LMtZUz public void setSSiteURL(String value) `BaJ >%| { BJ5^-| sSiteURL = value; czB),vooz } b'vIX<
g _ D"S Vl'rO_?t public String getSFilePath() IYr}%:P) { ;1>V7+/ return sFilePath; ZmJ<FF4 } OM`Ws5W}f
~D` U99Uny9 public void setSFilePath(String value) =Wz)(N { A7T(p7pP sFilePath = value; uC[F'\Y } 0C6T>E7 7y$U$6 ME.!l6lm\ public String getSFileName() Qtt3;5m { |D[LU[<C return sFileName; Or55_E } zy|h1.gd qa4j>; hZ')<@hNP public void setSFileName(String value) =4OV
}z=I { }C$D-fH8sW sFileName = value; nj-LG!"a } ]?NiY:v tg9{(_t/W Zq:c2/\c} public int getNSplitter() lg{M\
+ { !LsIHDs4 return nSplitter; R~;8v1>K } 7&(h_}Z tq L2' (= ,pUB[w\ public void setNSplitter(int nCount) }*vE/W { +,)Iv_Xl$ nSplitter = nCount; JZJb&q){ } R?Ch8mW.! } };f^*KZ=0 14(ct V|/N-3M /* ?.c:k;j **Utility.java 6w_TL<S */ w BoP&l package NetFox; ~b%dBn]n> Oe;1f#`5 Fz5eCe\B public class Utility { Ci2*5n< lbh7`xCR fVi[mH0=+ public Utility() MOm+t]vq1 { z9v70
q vOl3utu7 2Tv
W 6 } //bQD>NBO Fw^^sB //线程睡眠 b27t-p8 public static void sleep(int nSecond) Rhw+~gd*F { 74hRG~ try{ 6t'.4SR Thread.sleep(nSecond);
6B}V{2 } G}aM~, v catch(Exception e) X<f4X"y { n>)h9q S e.printStackTrace (); v7f[$s$m } hb>uHUb& } m]}EVa_I`/ pezfB{x? //日志 PK&X |
h public static void log(String sMsg) ]1I-e2Q-J { OUN"'p%% System.err.println(sMsg); yvnvI y } !P6?nS ;Q[E>j?w= (v$
i public static void log(int sMsg) Qz$Wp* { TZdJq System.err.println(sMsg); \7e4t } KYq<n& s } 0;%\L :,O ; NO#/ H)rJ>L /* :]LW,Eql **TestMethod.java HaF&ooI5+ */ v7D0E[)~ package NetFox; $-\%%n0>6
vF'IK, ~N)(|N public class TestMethod { $-(lp0\*
_6L'}X$)N 7}(YCZny5 public TestMethod() =r&i`L{] { ///xx/weblogic60b2_win.exe X3y28 %R try{ !"ydl2 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); CM t$) //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); _6]tbni?v SiteFileFetch fileFetch = new SiteFileFetch(bean); Mv:\T%] fileFetch.start(); `*i:z' } 8rNf4]5@X( catch(Exception e){e.printStackTrace ();} -.Zy( y-Lm^GW4 J?jxD/9Yb } Iomx"y]9 oMNBK/X_ {<cgeH public static void main(String[] args) GZmfE` { +hs:W'`% new TestMethod(); +KIBbXF7 } _9S"rH[ } -@~4: o 点击下载更多相关资料
|