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/* 9xvE?8;M# **SiteFileFetch.java 7b_Ihv
*/ jF'azlT package NetFox; J jCzCA:K_ import java.io.*; E6-alBi% import java.net.*; 4g#pQ mySm:ToT VvwQz#S public class SiteFileFetch extends Thread { kMS[ 2
AZ[gr@c P^%.7C SiteInfoBean siteInfoBean = null; //文件信息Bean }{^i*T5rl long[] nStartPos; //开始位置 iz`u@QKc% long[] nEndPos; //结束位置 7/;Xt& FileSplitterFetch[] fileSplitterFetch; //子线程对象 =sP6 long nFileLength; //文件长度 K/ q:aMq boolean bFirst = true; //是否第一次取文件 %^=fjJGV{~ boolean bStop = false; //停止标志 *R*Tmo" File tmpFile; //文件下载的临时信息 edPnC
{?s DataOutputStream output; //输出到文件的输出流 'iN8JO> BPnZ"w_ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Pl=X<Bp public SiteFileFetch(SiteInfoBean bean) throws IOException $cev,OW6] { ^P-!pK* siteInfoBean = bean; ;bd\XHwMUP //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); DTdL|x.{ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); K<b -|t9f if(tmpFile.exists ()) z(^p@&r)F { t_YiF%}s bFirst = false; S:] w@$ read_nPos(); E'LkoyI } uU`zbh}]L. else :L9\`&}FS { m p~\ioI*d nStartPos = new long[bean.getNSplitter()]; l[^bo/ nEndPos = new long[bean.getNSplitter()]; d]h[]Su/? } FXFQ@q*}v \z8TYx@ =,I,K=+_x LiJ;A* } 4EuZe:'X B$Jn|J"/6 knypSgk_ public void run() Dw{C_e { R+Ke|C //获得文件长度 tiwhG%?2 //分割文件 &%J{C3Q9 //实例FileSplitterFetch P/t$xqAL //启动FileSplitterFetch线程 -4b9( //等待子线程返回 PG)dIec try{ [HIg\N$I8C if(bFirst) ms3Ec`i9 { CQ sVGn{x nFileLength = getFileSize(); \VPU) if(nFileLength == -1)
4MRHz{`wa { f&^K>Jt1@# System.err.println("File Length is not known!"); O>w$ } Kd;|Z else if(nFileLength == -2) u9m"{KnV { +S|y)W8 System.err.println("File is not access!"); ~&k1P:#R } Z/hSH
0 (~ else \I#2Mq? { WJe for(int i=0;i<nStartPos.length;i++) ;wDcYs { BWL~)Hx nStartPos = (long)(i*(nFileLength/nStartPos.length)); H@__%KBw } 6}Y^X for(int i=0;i<nEndPos.length-1;i++) ,_YCl09p( { E'Egc4Z2=l nEndPos = nStartPos[i+1]; tb&{[|O^ } SLz^Wg._ nEndPos[nEndPos.length-1] = nFileLength; CbS9fc& } 5Z6$90!k } z7{b>oub(' |;{wy lGjmw"/C //启动子线程 ]O7I7K fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; <J {VTk ~ for(int i=0;i<nStartPos.length;i++) ]_|qv1K6 { %S.R@C[3 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), InNuK0@ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), u Dm=W36 nStartPos,nEndPos,i); K-k;`s# Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); +Medu?K
` fileSplitterFetch.start(); W?F+QmD } 3HFsR) // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), gjvKrg siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); FB6`2E%o // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", E;D9S nEndPos = " + nFileLength); f]%$HfF@ // fileSplitterFetch[nPos.length-1].start(); gHvxmIG _hA p@?
M %{&yXi:mS //等待子线程结束 9dJARSUuF //int count = 0; =<iK3bPkU //是否结束while循环 sh:sPzQ%Jv boolean breakWhile = false; Skp&W*Ai yYp!s "ln(EvW while(!bStop) 2m[z4V@` { a0CmCv2# write_nPos(); qL,! Utility.sleep(500); aJOhji<b#L breakWhile = true;
. sgV ZnI_<iFR* -fT]}T6= for(int i=0;i<nStartPos.length;i++) DE^{8YX, { x<~ pqq8] if(!fileSplitterFetch.bDownOver) oh :g { t]2~aK<] breakWhile = false; R4]t D| break; K82pWpR } NK$k9, } #fRhG^QKp if(breakWhile) 2jOh~-LU break; I|n<B"Q6^ GFYAg pI,QkDJ0 //count++; 5|9,S //if(count>4) ] 06LNE // siteStop(); M0S}-eXc5 } # ~}
26 O3j:Y|N@F Jj8z ~3XnJ System.err.println("文件下载结束!"); .MXznz } vjhd| catch(Exception e){e.printStackTrace ();} m`}!
dBi } 7(QRG\G# 9H_2Y%_ C;1A$]bk //获得文件长度 z+@aQ@75 public long getFileSize() G{pfyfF { 8T):b2h int nFileLength = -1; Yo/U /dB try{ "
2Dz5L1v URL url = new URL(siteInfoBean.getSSiteURL()); 68[3
/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); M$B9?N6 httpConnection.setRequestProperty("User-Agent","NetFox"); 1y2D]h /' ^&03D5@LoY C\ZL*,%} int responseCode=httpConnection.getResponseCode(); GLp2
?fon if(responseCode>=400) d(3F:dbk { {KxeH7S processErrorCode(responseCode); .0:BgM return -2; //-2 represent access is error h3Nwxj~E } *`mPPts} :2pd2 S &=Gz[1
L String sHeader; IEfzu L<v CC0@RU 5Q#;4 for(int i=1;;i++) x%pC.0% { y>Zvos e //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); I= G%r/3 //Utility.log(in.readLine()); vIF=kKl9, sHeader=httpConnection.getHeaderFieldKey(i); 4v_?i@,L if(sHeader!=null) D>+&= 5{ { p(QB 5at if(sHeader.equals("Content-Length")) >6*"g{/ { L$=@j_V2 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); q#:,6HDd break; 8c(}*,O/ } LZch7Xe3 } M$DJ$G|Z else Gtd!Y
x break; u/Fa+S } `zGK$,[% } Z4A
a catch(IOException e){e.printStackTrace ();} r(h&=&T6 catch(Exception e){e.printStackTrace ();} kMWu%,s4
O<Qa1Ow7f T)&J}^j Utility.log(nFileLength); (JH LWAH
F' s($n ]wh8m1 return nFileLength; )8kcOBG^L } U_v{Vs @=,2{JF*6 jCDZ$W89 //保存下载信息(文件指针位置) [t*m$0[: private void write_nPos() F`SOF O { fzO4S^mTo8 try{ VgtWT`F.I output = new DataOutputStream(new FileOutputStream(tmpFile)); YLmzMD> output.writeInt(nStartPos.length); DeE-M" for(int i=0;i<nStartPos.length;i++) -ZFeE[Z { xB_F?d40T5 // output.writeLong(nPos); F@Y)yi?z output.writeLong(fileSplitterFetch.nStartPos); AWHB^}!} output.writeLong(fileSplitterFetch.nEndPos); xx0s`5 } Xt~`EN output.close(); x|i"x+o } Xoyk 'T]- catch(IOException e){e.printStackTrace ();} #mlTN3 catch(Exception e){e.printStackTrace ();}
=]&?(Gq } [/hS5TG|7 sUN>uroi ! 6kuN) //读取保存的下载信息(文件指针位置) b/Y9fQn private void read_nPos() o"~ODN"L { z"*X/T try{ 9PjL
4A DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); }c1Vu int nCount = input.readInt(); ,oX48Wg_+ nStartPos = new long[nCount]; [Av#Z)R nEndPos = new long[nCount]; ?Y+xuY/t for(int i=0;i<nStartPos.length;i++) _/ bF t6 { s|rlpd4y nStartPos = input.readLong(); rGuhYYvK nEndPos = input.readLong(); ((^jyQ } @'L/] input.close(); 9 +"D8J7 } Os^ sOOSY catch(IOException e){e.printStackTrace ();} # eqt{ catch(Exception e){e.printStackTrace ();} LO]D
XW 9 } eT1b88_ UMwB. * | qtdmm private void processErrorCode(int nErrorCode) 0#4_vg . { l%\3'N] System.err.println("Error Code : " + nErrorCode); ]'V8{l } B3K!>lz qKt8sxg I Gv_s+O-* //停止文件下载 C\Q3vG public void siteStop() F{)YdqQ { Mf7Q+_! bStop = true; Af1izS3 for(int i=0;i<nStartPos.length;i++) {PgB~|W fileSplitterFetch.splitterStop(); 3Yf%M66t r|4jR6%<'m ,{:c<W:A] } _ _cJ+%e } 5,`U3na, //负责部分文件的抓取 :J]S+tQ) **FileSplitterFetch.java J9S9rir& */ # m?GBr%k package NetFox; jm&?;~>O :0IxnK(r& q"ba~@<BEl import java.io.*; q9o =,[ import java.net.*; Onb*nm u\=gps/Z / U1VE|T public class FileSplitterFetch extends Thread { B%gk[!d}8 "
]
0ER [0.>:wT String sURL; //File URL 75i
M_e\ long nStartPos; //File Snippet Start Position LqIMU4Ex long nEndPos; //File Snippet End Position ANtp7ad int nThreadID; //Thread's ID *}R5=r0 boolean bDownOver = false; //Downing is over !e@G[%k boolean bStop = false; //Stop identical pcXY6[#N FileAccessI fileAccessI = null; //File Access interface u^a\02aV[ 1Lz`.%k`: q88p~Ccoa public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ;5^grr@,4 { MK9?81xd this.sURL = sURL; IIeEe7%# this.nStartPos = nStart; vLR)B@O,2 this.nEndPos = nEnd; 9\3% 5B7 nThreadID = id; @z"Zj 3ti fileAccessI = new FileAccessI(sName,nStartPos);//定位 8yz A
W&q } &b,.W;+ .vNfbYH( udtsq"U_% public void run() }<7Dyn, { VOwt2&mZ while(nStartPos < nEndPos && !bStop) s([9/ED { mXlXB#N ]W<E#^ ]*j>yj.Y'~ try{ G?\o_)IJ URL url = new URL(sURL); 6yk HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); L`FsK64@ httpConnection.setRequestProperty("User-Agent","NetFox"); T'i9_V{ String sProperty = "bytes="+nStartPos+"-"; ,]Yjo>`tW httpConnection.setRequestProperty("RANGE",sProperty); v}A] R9TY Utility.log(sProperty); B)
&BqZ& JfKhYRl asP>(Li InputStream input = httpConnection.getInputStream(); a8M.EFa: //logResponseHead(httpConnection); mkYM/*qyM& O/_}O_rR KQi9qj byte[] b = new byte[1024]; [UNfft=K3P int nRead; mmY~V:,Kd while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ({D.oS { -qfd)A6] nStartPos += fileAccessI.write(b,0,nRead); i051qpj //if(nThreadID == 1) %_M B- // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qA9*t } L6BHh_*E kr8NKZ/ N\H{p%8 Utility.log("Thread " + nThreadID + " is over!"); /7@@CG6b bDownOver = true; ;G!X?(%+ //nPos = fileAccessI.write (b,0,nRead); 25ul,t_Du } d|on
y catch(Exception e){e.printStackTrace ();} 6`NsX } d(,-13 } Q9K
Gf; E1 *\)q |F<U;xV$p //打印回应的头信息 OI %v>ns public void logResponseHead(HttpURLConnection con) 0VoC|,$U { A42At] for(int i=1;;i++)
)%;#~\A { '7>Vmr6 String header=con.getHeaderFieldKey(i); DBCL+QHA if(header!=null) dcU|y%k% //responseHeaders.put(header,httpConnection.getHeaderField(header)); >~BU<# Utility.log(header+" : "+con.getHeaderField(header)); -2> L*"^ else ?jw)%{iKYV break; G2a fHL< } <n }=zu } :KX/` `<HY$PAe m>:%[vm public void splitterStop() }E>2U/wpXY { 5F^,7A4I0 bStop = true; q>Px } 6J%SkuxR b@1QE t T-]Vj. } MLBZmM ' <@*mFq0 , ]qV J> /* MM'<uy **FileAccess.java 9%zR?u *//文件访问(定位,写) 7Fy^K;V" package NetFox; &~E=T3 import java.io.*; F,:F9r?l,H ^D.B^BR MIR17%G public class FileAccessI implements Serializable{ 9s*Lzi[} oAvJ"JH@i //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 >wMsZ+@m RandomAccessFile oSavedFile; }FM<uBKW long nPos; `M7){ HNh=igu cz T@ txF public FileAccessI() throws IOException -w@fd]g { Zfb:>J@h6 this("",0); '
>\* } ,E>VYkoA V 9<[v?.\ ~{5%~8h.0r public FileAccessI(String sName,long nPos) throws IOException t?0=;.D { vG\Wr.h0!= oSavedFile = new RandomAccessFile(sName,"rw"); zkd#vAY(A this.nPos = nPos;
RMi
2Ip oSavedFile.seek(nPos); /(}V!0\? } 1:>RQPXcWv yTDoS|B+) |f>y"T+1 public synchronized int write(byte[] b,int nStart,int nLen) n[iil$VKh { {M%"z,GL7J int n = -1; rg'? ?rq try{ T8Khm O oSavedFile.write(b,nStart,nLen); *|=&MU*+ n = nLen; G2jEwi } N{q'wep catch(IOException e) uj:w^t ][ { ,LMme}FFeb e.printStackTrace (); u!@P,,NY } tNUcmiY /60[T@Mz #Se return n; *e8V4P } 9
/zz@ 2
G"p:iPp kfVG@ o?o } 1L9^N 22*t%{( =~arj /* \E#r[9F{ **SiteInfoBean.java >WD^)W fa */ vc!S{4bN package NetFox; L;`4" &x3"Rq_ z44uhR h public class SiteInfoBean { txgGL' BT#>b@Xub E8j9@BHU[r private String sSiteURL; //Site's URL KC]Jbm{y private String sFilePath; //Saved File's Path yf8UfB#a private String sFileName; //Saved File's Name \W\6m0-x private int nSplitter; //Count of Splited Downloading File SP*5 W)6 2h:f6=)r/u HaC3y[ LJ0 public SiteInfoBean() RXof$2CZS {//nSplitter的缺省值为5 RSi0IfG5 //default value of nSplitter is 5 d,[KcX this("","","",5); .ClCP?HG } 5\'%zZ, l mvL'l) \=_8G:1 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) yd%\3}- { 1Efl|lV sSiteURL= sURL; $%E9^F sFilePath = sPath; "''<:K| sFileName = sName; s7
KKH
w this.nSplitter = nSpiltter; sogbD9Jc ?dmMGm0T9 nn
} 2(rZ@Wl `MwQ6%lf T7T!v public String getSSiteURL() KALg6DZe: { 2at?9{b return sSiteURL; LAKZAi%O0 } iR_Syk`G*A VoyH: [s34N+vU public void setSSiteURL(String value) w@ 5/mf? { /SKr.S61e sSiteURL = value; ~76.S } 0C p} oe*&w9Y}& ZYt
__N public String getSFilePath() )e2IT*7 { z-gwNE{ return sFilePath; u`'z~N4} } RsD`9>6) } >w I:_*8el&d public void setSFilePath(String value) D+)=bPMe { |Hm'.- sFilePath = value; UjDF } u#M)i30j s4gNS
eA r^E]GDz public String getSFileName() &o/4hnHYt { #VV.[N return sFileName; uT/B}`md } Y+
Z9IiS7 z;C=d(|nN M&ij[%i public void setSFileName(String value) Vrj1$NL% { 3NN'E$"3 sFileName = value; <VU4rk^= } &&}5>kg>d o1WidJ" E)JyKm. public int getNSplitter() 7Hl_[n| { e^NEj1 return nSplitter; K~8tN,~& } uvDoo6' ]kkBgjQbS 2]3HX3 public void setNSplitter(int nCount) yJ8}*Gj& { 3> #mO}\ nSplitter = nCount; P"x-7>c>Y
} |NU0tct^ } Dum`o^l# 5g1M_8e'+ Ke?gz:9j /* p$nK@t} **Utility.java <i'u96 */ [u9JL3 package NetFox; f4k5R =/g$bZ T_x+sv=|X! public class Utility { K@P`_yxN 'K3s4x($ I\upnEKKzZ public Utility() +F o$o { zZ9<4"CIk hO/5>Zv? *?bk?*?s } 6"i{P Q*:h/Lhb& //线程睡眠 FGwnESCC public static void sleep(int nSecond) ,xYsH+ybA { R6Zj=l[ try{ %XI"<Y\yL Thread.sleep(nSecond); &'(a$S>v } adI!W-/R: catch(Exception e) )@,90Vhh { < m enABN4 e.printStackTrace (); H=&/ Q } 2]D$|M?$~ } xegQRc Y=a v8Y|` //日志 sm;E2BR$
` public static void log(String sMsg) 6~ 7 ;o_> { S,9NUt System.err.println(sMsg); eA?uny
f2r } 5@czK*5 q9^Y?` LZr0]g{Pu/ public static void log(int sMsg) A<SOT >m] { KQ4kZN System.err.println(sMsg); ACigeK^C}E } v7;J%9=0D` } 2.LJp}> y9C;T(oi; *N-;V|{ /* @S}/g/+2 **TestMethod.java U g}8y8
*/ NoCDY2 $ package NetFox; 9-
xlvU,o JF~1'"_f: <0u\dU public class TestMethod { /m`}f]u qoC]#M$oo# gA~20LSt public TestMethod() ?a5h iN0 { ///xx/weblogic60b2_win.exe C.J`8@a]? try{ ~;M)qR?]W SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); E X%6''ys //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); d/D,P=j" SiteFileFetch fileFetch = new SiteFileFetch(bean); _wf5%(~b fileFetch.start(); "]VDY) } h+,'B&=|_ catch(Exception e){e.printStackTrace ();} 3k#[(phk /g_9m i2){xg~c } #`W=mN(+k 10wvfRhng )~ 0}Et l public static void main(String[] args) >i
"qMZ { nX0HT
)} new TestMethod(); x_*%*H } Qg(Z{V } :e*DTVv8 点击下载更多相关资料
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