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/* _D,f4.R **SiteFileFetch.java }Rxg E~F */ Zbh]SF{3F package NetFox; #_\MD,( import java.io.*; *u;">H*BW import java.net.*; :_,]?n 6cT~irP i)PV{3v$J public class SiteFileFetch extends Thread { EZumJ." %g@3S!lK b_gN?F7_ SiteInfoBean siteInfoBean = null; //文件信息Bean m?% H<4X long[] nStartPos; //开始位置 >VUQTg long[] nEndPos; //结束位置 nk|N.%E FileSplitterFetch[] fileSplitterFetch; //子线程对象 &zX 3 long nFileLength; //文件长度 jl-Aos"/ boolean bFirst = true; //是否第一次取文件 JBEgiQ/ boolean bStop = false; //停止标志
W%9K5(e File tmpFile; //文件下载的临时信息 Y\Qxdq DataOutputStream output; //输出到文件的输出流 ])j|<W/ bZay/ Zkj //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Hu(flc+z" public SiteFileFetch(SiteInfoBean bean) throws IOException A~GtK\=; { VFmg"^k5 siteInfoBean = bean; 2*q:
^ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); &Pg-|Ql tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); K&IrTA
j} if(tmpFile.exists ()) kbp(
a+5 { ml33qXW: bFirst = false; ^&';\O@) read_nPos(); ;.Oh88|k } Xtu`5p_Qv else tGO[A#9a { :{i$2\DH6 nStartPos = new long[bean.getNSplitter()]; bqQO E4; nEndPos = new long[bean.getNSplitter()]; { .3 } @Gn?8Ur% VXc+Wm*W j*La,iF k4F"UG-` } [X">vaa 1u"*09yZd 2~&hstd% public void run() /q"d`!h)w { sE%<"h\_0 //获得文件长度 }L$Xb2^l //分割文件 0fPHh>u //实例FileSplitterFetch `f6)Q`n //启动FileSplitterFetch线程 $v'Y: //等待子线程返回 Ueg N-n try{ JXLWRe if(bFirst) kBiBXRt { l'7Mw%6{ nFileLength = getFileSize(); 5h|m4)$ if(nFileLength == -1) U.hERe~X { P7wqZ? System.err.println("File Length is not known!");
>)n4sMq } MB8SB else if(nFileLength == -2) #NN"(I { G V:$; System.err.println("File is not access!"); EAD0<I<>
} u3*NO
)O else $vTAF-~Ql { $\,BpZ
}3 for(int i=0;i<nStartPos.length;i++) W`Q$t56 { b$goF
}b'g nStartPos = (long)(i*(nFileLength/nStartPos.length)); ,u&tB|,W, } QlRoe|{ for(int i=0;i<nEndPos.length-1;i++) X<Th{kM2 { 2B9i R nEndPos = nStartPos[i+1]; ovDJ{3L6O } t8DL9RW' nEndPos[nEndPos.length-1] = nFileLength; &>W (l. } LmXF`Y$ } xMNNXPz( vcw>v={x +dCDM1{_a //启动子线程 xBL$]> fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; b'7z DZI] for(int i=0;i<nStartPos.length;i++) |k`f/* { *,W!FxJ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), c/<Sa|' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), $"sq4@N nStartPos,nEndPos,i); g=FDm* Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 5?5-;H fileSplitterFetch.start(); wc7mJxJxA } #*Yi4Cn< // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Y^f94s:2S siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); $!|8g`Tm // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", jD ' nEndPos = " + nFileLength); JO2ZS6k[ // fileSplitterFetch[nPos.length-1].start(); 7b&JX'`Mb #+K
Kvk )D["M$ZA^ //等待子线程结束 af<NMgT2s~ //int count = 0; IpWy)B>Fl3 //是否结束while循环 $hjP}- oUX boolean breakWhile = false; M&qh]v gC 'dIX=/RZ v[{8G^Z}54 while(!bStop) Fl_dzh,E { sK`~Csb
iB write_nPos(); n#+%!HTh Utility.sleep(500); %RQ C9! breakWhile = true; x">W u2 m]FaEQVoE .KLm39j( for(int i=0;i<nStartPos.length;i++) .M9d*qp`S { }+91s'/c if(!fileSplitterFetch.bDownOver) >=-GD2WK { h4CTTe) breakWhile = false; =tr1*s{ break; RzA2*]%a } E`Jp(gK9F }
&W=V%t>Z if(breakWhile) <w0NPrS] break; -{X<*P4p ixIV=#
4%g6_KB //count++; P%zH>K //if(count>4) _0'm4?" // siteStop(); b8J@K" } Y{B9`Z RAIVdQ}.Z 1. #
|QX System.err.println("文件下载结束!"); 7 I_1 #O } dB@Wn!Y catch(Exception e){e.printStackTrace ();} m#oh?@0} } )W&o?VRfO GWF/[% EY+/.=$x //获得文件长度 XR*Q|4 public long getFileSize() QS3U)ZO$@ { ]43al f F# int nFileLength = -1; uYFMv=>j try{ %1Bn_ URL url = new URL(siteInfoBean.getSSiteURL()); [Q4_WKI0T HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Q)09]hP[Xj httpConnection.setRequestProperty("User-Agent","NetFox"); j*uXB^4 )^4ko 3gb|x? int responseCode=httpConnection.getResponseCode(); J+Q+&-a if(responseCode>=400) P!kw;x { \Sg<='/{L; processErrorCode(responseCode); kTnOmAw return -2; //-2 represent access is error >qR7'Q wP } s K+
(v *_`76`cz%X &^V~cJ String sHeader; _i5mC,OffN U?gl"6x tbtI1"$ for(int i=1;;i++) C>.e+V+': { 9|'
|BC //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); >;
aCf#q //Utility.log(in.readLine()); |#{- .r6Y] sHeader=httpConnection.getHeaderFieldKey(i); EQ4#fAM) if(sHeader!=null) 'eDJ@4Xm { 9]"S:{KSCn if(sHeader.equals("Content-Length")) ac9qj { v @:~mwy nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); kr%2 w break; XC=%H'p } Y[2Wt%2\6 } m23+kj)+VY else g3Z:{@m break; l
:/&E 6 9 } ,Du@2w3Cq } N;uUx#z catch(IOException e){e.printStackTrace ();} ?a
S% catch(Exception e){e.printStackTrace ();} 4t04}vp `>s7M.|X CdY8#+"
Utility.log(nFileLength); ]<1HM"D F8H'^3`b`U WvujcmOf return nFileLength; U#bl=%bF } #O" ["}A
S: P''X_1oMC //保存下载信息(文件指针位置) +noZ<KFW
" private void write_nPos() S='
wJ@?; { Ht#@'x try{ zF8'i=b& output = new DataOutputStream(new FileOutputStream(tmpFile)); PocYFhWQ` output.writeInt(nStartPos.length); qD#VbvRc9+ for(int i=0;i<nStartPos.length;i++) bp#:UUO%S { 2R]&v;A // output.writeLong(nPos); J{`eLmTu output.writeLong(fileSplitterFetch.nStartPos); !22yvT.;[ output.writeLong(fileSplitterFetch.nEndPos); SyO79e*t } h{k_6ym output.close(); h4/X
0@l` } tAjx\7IX catch(IOException e){e.printStackTrace ();} b.b@bq$1 catch(Exception e){e.printStackTrace ();} 2jl)mL }
bLqy!QE
B$^7h! R[LsE^ //读取保存的下载信息(文件指针位置) i(*I@ku private void read_nPos() *5e+@rD` { Bd@'e7{ try{ 3J{vt"dS DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ZQ3_y $ int nCount = input.readInt(); %r;w;`/hA nStartPos = new long[nCount]; ?vgH"W~3> nEndPos = new long[nCount]; NBjeHtT for(int i=0;i<nStartPos.length;i++) m#f{]+6U
{ z%1{ nStartPos = input.readLong(); 9I`Y-D nEndPos = input.readLong(); *:_P8G; } Q/ZkW input.close(); +R6a}d/K } n-o3 catch(IOException e){e.printStackTrace ();} eWvo,4 catch(Exception e){e.printStackTrace ();} \hlR]m!C } /-4$7qd oE?QnH3R 3xNMPm private void processErrorCode(int nErrorCode) Q$ri=uB;+ { >`'O7.R System.err.println("Error Code : " + nErrorCode); e}0:"R%E } >xu[q\:" O oSb>Y/4 A5fwAB //停止文件下载 Ue*C>F
public void siteStop() #eK= { ow6*Xr8eQ bStop = true; ]JE TeZ^/ for(int i=0;i<nStartPos.length;i++) Z{R[Wx fileSplitterFetch.splitterStop(); kS :\Oz\
%+-C3\' {f/ ]5x(_ } w~Ff%p@9 } 5Y\!pf7SQ| //负责部分文件的抓取 f[sF:f(zI **FileSplitterFetch.java >^$2f&z */ LO:fJ{ - package NetFox; \*0yaSQF 'Z&;uv,l e-5?p~> import java.io.*; _q?<at}y import java.net.*; 3= -pG C+{l7QT$t (\a6H2z8l public class FileSplitterFetch extends Thread { uj|BQ`k w$|l{VI FP^{=0 String sURL; //File URL B*1W`f long nStartPos; //File Snippet Start Position 6rN(_Oi- long nEndPos; //File Snippet End Position [xb]Wf int nThreadID; //Thread's ID tMp=-" boolean bDownOver = false; //Downing is over %7hB&[ 5 boolean bStop = false; //Stop identical J*fBZ.NO FileAccessI fileAccessI = null; //File Access interface ILwn&[A0 otJ!UfpR8 ($nrqAv4 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ~8T(>!hE1h { ,8MLoZ_ this.sURL = sURL; BZv+H=b this.nStartPos = nStart; v"^~&q0x this.nEndPos = nEnd; oU6y4yO nThreadID = id; gEQNs\Jn
L fileAccessI = new FileAccessI(sName,nStartPos);//定位 ]bi)$j.9s } 1w(JEqY3h: xI*#(!x"G DI|:p!Nx public void run() L,,*gK { ]aryV?!6 while(nStartPos < nEndPos && !bStop) JUAS$Y { ~z5R{;Nbz| 8>WVodv fV:4#j try{ D4JLtB'= URL url = new URL(sURL); TXXy\$ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 4Kwh?8. httpConnection.setRequestProperty("User-Agent","NetFox"); WQNE2Q String sProperty = "bytes="+nStartPos+"-"; f:B>zp;N httpConnection.setRequestProperty("RANGE",sProperty); ;Lm=dd@S: Utility.log(sProperty); 5kNzv~4B,; SLfFqc+n0 'CZa3ux InputStream input = httpConnection.getInputStream(); X|D!VX>#! //logResponseHead(httpConnection); YW\0k5[ R%D'`*+ U$dh1; byte[] b = new byte[1024]; h].~# * int nRead; COzyG.R. while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) `(6r3f~XJ { G rmzkNlN nStartPos += fileAccessI.write(b,0,nRead); kql0J|P? //if(nThreadID == 1) YXurYwV // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); E m
6Qe } bI)u/ Wo~vhv$E ig LMv+{ Utility.log("Thread " + nThreadID + " is over!"); }N0Qm[R bDownOver = true; PQKaqv}N //nPos = fileAccessI.write (b,0,nRead); .`<@m]m- } SUKxkc( catch(Exception e){e.printStackTrace ();} qn1255fB } Vm}%ttTC } bwM@/g%DL !o=U19) }]n$ %g( //打印回应的头信息 +Q=1AXe public void logResponseHead(HttpURLConnection con) `LAR@a5i { l
{jmlT for(int i=1;;i++) ?{w3|Ef& { jcNT<}k
C String header=con.getHeaderFieldKey(i); Uy
? if(header!=null) ;w|b0V6 //responseHeaders.put(header,httpConnection.getHeaderField(header)); ]lw|pvtd Utility.log(header+" : "+con.getHeaderField(header)); n+lOb else yme^b
;a break; {!|}=45Z } DrnJ;Hi" } m-^8W[r+_ Y)N-V
]5L o&AM2U/? public void splitterStop() ac kqH+' { P`s bStop = true; -/{4Jf Wf } x3qW0K8 pj4!:{.; >9RD_QG7 } {u1V|q aLJ(?8M@ )ZrS{vY /* :=%0Mb: **FileAccess.java o?1;<gs *//文件访问(定位,写) Xc"&0v%;# package NetFox; `(A5f71MfM import java.io.*; PP:(EN1 pfu1O6R 1]IQg;q public class FileAccessI implements Serializable{ x+f2GA$ 5JEbe //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 DvvT?K RandomAccessFile oSavedFile; `n$5+a+ long nPos; V $z}
K =@k%&* Y? upj]6f"( public FileAccessI() throws IOException .h0b~nI>> { &>e-(4Xu this("",0); N2.AKH } :Mm3
gW) zIP6\u
,g%&|FAP public FileAccessI(String sName,long nPos) throws IOException 5~mh'<: { meN2ZB?Y oSavedFile = new RandomAccessFile(sName,"rw"); Z|%_oR~b| this.nPos = nPos; ;<G=M2 oSavedFile.seek(nPos); T3`ludm^u } tmqY2. Y0D}g3` ynA|}X public synchronized int write(byte[] b,int nStart,int nLen) h3dsd { &WNf
M+ int n = -1; JaB<EL-9r2 try{ Gmf B oSavedFile.write(b,nStart,nLen); lA>DS#_ n = nLen; f!O{%ev } )(y)A[ catch(IOException e) pb#?l6x$+ { r5!/[_l e.printStackTrace (); CHV*vU<N } Q#nOJ(KV ,V*%V; R+&jD;U{ return n; !Hys3AP } x\Z'2?u} 5)
-~mWy pp7$J2s+j } 5]M>8ll C@jJ.^
<< $.9{if#o& /* XJLQ{ **SiteInfoBean.java gY@N~'f;" */ J>u
7, package NetFox; {uGP&cS~( 6xD#? hEh}PX: public class SiteInfoBean { w`q%#qRk ew"v{=X e9Nk3Sj] private String sSiteURL; //Site's URL ID#I`}h.k private String sFilePath; //Saved File's Path meOMq1 private String sFileName; //Saved File's Name k?2k'2dy private int nSplitter; //Count of Splited Downloading File 61xs%kxb.. rk)##) Q>n|^y6 public SiteInfoBean() MNSbtT*^ {//nSplitter的缺省值为5 |=&cQRY!p //default value of nSplitter is 5 %;.;>Y(- this("","","",5); @:KJYm[ } 26xXl|I /="~gq@ {dmj/6Lc public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 6ND`l5
{ 2 !'A:; sSiteURL= sURL; n> ^[T[.S sFilePath = sPath; <Qxh)@
N sFileName = sName; gks{\ H] this.nSplitter = nSpiltter; CZ nOui $z+8<?YD cK 06]-Y } =b/L?dR.- =2@B& A'2w>8 public String getSSiteURL() a{[x4d,z { 6P';DB return sSiteURL; U^Xm)lL } )HX|S-qRU= +zy=50, D}vmwg@3 public void setSSiteURL(String value) gB<3-J1R { 9Lr'YRl[W sSiteURL = value; `3:.??7N } T8^5=/ < P`u} 4Z/f@ZD public String getSFilePath() YX`7Hm, { P{u0ftyX} return sFilePath; '3?\K3S4i } 5< ja3 zL\OB?)5J *6} N =Z public void setSFilePath(String value) hcyM6:} { /c,(8{(O sFilePath = value; lg(bDKm } *k19LI.5 hXA6D) Aj0Tfdxy public String getSFileName() 2 aL) { mQY_`&Jq return sFileName; e#E2>Bj; } lEV]4
t_H 9-rNw?7 0=K9`=5d0 public void setSFileName(String value) rta:f800z { -N"&/) sFileName = value; 1|ra&(=) } #
0Lf<NZ ;s52{>&F] 9k 6r_G" public int getNSplitter() ^.>jGI%rB { (7 r<'' return nSplitter; }X=[WCKU } ?yj6CL(, Pcw6!xH LGl2$#x public void setNSplitter(int nCount) (<)]sp2 { AhNq/?Q Q~ nSplitter = nCount; xe*aC } AW,53\ 0 } 5:kH;/U #b~JDO( m'f,_ \' /* CjiVnWSz< **Utility.java d$
^ ,bL2p */ gmm|A9+tv package NetFox; >Bgw}PI X@f "-\ VP6ZiQ| public class Utility { yUp,NfS]o nH<eR)0 'z[Sp~I\ public Utility() SGe^ogO"v { a|?4) >hr{JJe WH= EPOR, } u&n'
ITH uh?>-
]r` //线程睡眠 BN4_: public static void sleep(int nSecond) l'3pQ; { Q*b]_0Rb try{ *q1% IJ Thread.sleep(nSecond); ;dzL}@we } /jRRf"B catch(Exception e) kbMYMx.[ { Oj^,m.R e.printStackTrace (); Q_Gi]M9 } /IM#.v } ,j$Vvz L\#<JxY$p //日志 3l#IPRn9AO public static void log(String sMsg) di>cMS 4 c { L*~J%7 System.err.println(sMsg); 19j+lCSvH } 8f3vjK' YWxc-fPZ UNkCL4N public static void log(int sMsg) l'TWkQ- { \xS&v7b System.err.println(sMsg); ]~E0gsq } ivW(*c } tz&y*e& aG92ay afb+GA! /* <Ce2r"U1e **TestMethod.java $]A/
o( */ uECsh2Uin package NetFox; Gqy,u3lE F
3'9u# H
`(exa:w public class TestMethod { $O dCL gR}35:$Z- 1)[]x9]^q' public TestMethod() G3{=@Z1 { ///xx/weblogic60b2_win.exe ~R@Nd~L try{ )}_a
0bt SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); XQ~Ke-QW) //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); H[='~%D SiteFileFetch fileFetch = new SiteFileFetch(bean); 4`8< fileFetch.start(); r!{LLc}> } hc'-Dh catch(Exception e){e.printStackTrace ();} %Pqf{*d8 6O}`i>/6M J|w)&bV } m:/wG&
! MC{
2X 44F`$.v96 public static void main(String[] args) Rh>}rGvCUN { F<(i.o( new TestMethod(); Z%x\~)~ } ]hbyELs } ._+J_ts 点击下载更多相关资料
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