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/* *WMcE$w/D **SiteFileFetch.java kf "cd1 */ A.WJ#1i}E package NetFox; 1grrb&K import java.io.*; =N7N=xY import java.net.*; puXJ:yo( D\*raQ`n vNE91 public class SiteFileFetch extends Thread { / d6mlQS i7 p#%2 }b\d CGVr SiteInfoBean siteInfoBean = null; //文件信息Bean ;'gzRC long[] nStartPos; //开始位置 q%>L/KJ# long[] nEndPos; //结束位置 9QY)<K~a FileSplitterFetch[] fileSplitterFetch; //子线程对象 k(VA5upCs long nFileLength; //文件长度 aN;L5;m#>{ boolean bFirst = true; //是否第一次取文件 ZV;#ZXch boolean bStop = false; //停止标志 D"A`b{z File tmpFile; //文件下载的临时信息 OkzfQ
hC} DataOutputStream output; //输出到文件的输出流 cE]tvL:g #exE~@fy- //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) {_(;&\5 public SiteFileFetch(SiteInfoBean bean) throws IOException MIt\[EB { HCHC~FNd siteInfoBean = bean; 00b
)B g //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); :O//A6v tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); s/,St!A4! if(tmpFile.exists ()) /}M@
@W { f0wQn09 bFirst = false; v`Sllv5bV read_nPos(); x]a>Q), } \n<N>j@3 else gvy%`SSW { i$og
v2J nStartPos = new long[bean.getNSplitter()]; .4KXe"~E nEndPos = new long[bean.getNSplitter()]; ~=0zZTG } 4|++0=#D$ /5yWvra ;! CQFJ= zyCl`r[} } .4-; ;AG5WPI CH9#<?l public void run() 7qzI] { [IV8 //获得文件长度 Ns1u0$fg //分割文件 \f{C2d/6j //实例FileSplitterFetch W*U\79H //启动FileSplitterFetch线程 AeUwih.
4 //等待子线程返回 FirmzB Il5 try{ A E7>jkHB if(bFirst) 7Bmt^J5i&t { C'5i>; nFileLength = getFileSize(); :Z=A,G if(nFileLength == -1) MWhFNfS8= { IL>Gi`Y& System.err.println("File Length is not known!"); {SROg;vA } vn,L),"= else if(nFileLength == -2) TSuHY0.cp { 0kC!v, System.err.println("File is not access!"); VK?,8Y } ,GR(y^S else C= hE@ { M:C*?;K: for(int i=0;i<nStartPos.length;i++) KZDB \T { TR:D nStartPos = (long)(i*(nFileLength/nStartPos.length)); "&C'K } 4H1s"mP< for(int i=0;i<nEndPos.length-1;i++) b(~NqV!i { 6Ajiz_~U nEndPos = nStartPos[i+1]; OkFq>;{a } pV>/"K nEndPos[nEndPos.length-1] = nFileLength; bLNQ%=FjO } < ^J!*> } q)!{oi{x( Iqo4INGIi <ygkK5#q //启动子线程 k (
R fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; -M[5K/[ for(int i=0;i<nStartPos.length;i++) k`TEA?RfQ { eKLxNw5 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), PU-;Q@< E siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), -JUv'fk nStartPos,nEndPos,i); 0 ]NsT0M Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); UGR5ILf fileSplitterFetch.start(); b/S4b } ]p#Zdm1EL // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), KN+*_L- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); A?6b)B/e? // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", eUBk^C]\ nEndPos = " + nFileLength); R8HA X // fileSplitterFetch[nPos.length-1].start(); *(r85lEou) p]pFZ";70 m0\(a_0V //等待子线程结束 qe\j$Cjy //int count = 0; !})+WSs'"s //是否结束while循环 ]HCt%5 boolean breakWhile = false; }b,a*4pN >xH3*0Lp !^\|r<2M while(!bStop) 0>.'w\,87B { )EcF[aO write_nPos(); $'[(
DwLS Utility.sleep(500); ][_:{ N/ breakWhile = true; 9$d (`-&9p L!e@T' 78NAcP~6c for(int i=0;i<nStartPos.length;i++) "w_(p|c m= { TJO|{Lxm if(!fileSplitterFetch.bDownOver) Gzm[4|nO^ { v_G4:tY breakWhile = false; gw5CU)r4$ break; I#9K/[ } =#>P! } qLPI^g, if(breakWhile) } 10Dvt>+ break; wePMBL1P* w|$;$a7) + ^~n09 //count++; iAXx`>}m //if(count>4) DpTQP u9 // siteStop(); @zPWu}&m } n287@Y4Ru &f!!UZMt) ~[,E
i k System.err.println("文件下载结束!"); Ie+z"&0 } {~d4;ht1Y catch(Exception e){e.printStackTrace ();} bg 7b!t1F } g[Yok`e[ zM)o^Fn2 vguqk!eo4 //获得文件长度 |r3eq4$Am public long getFileSize() ,@>B#%Nz { !X#=Pt[, int nFileLength = -1; U>:p`@ try{ A}oR,$D- URL url = new URL(siteInfoBean.getSSiteURL()); cvc.-7IO HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 'MC)%N, httpConnection.setRequestProperty("User-Agent","NetFox"); j[=f;&1 q 2=^l oR3$A :!P= int responseCode=httpConnection.getResponseCode(); ]aaHb if(responseCode>=400) Lqz}h-Ei { >Axe7<l processErrorCode(responseCode); i>0bI^H return -2; //-2 represent access is error XSZW9/I-(| } vbA9V<c& Be}Cj(C HK
;C*;vC% String sHeader; f)gA.Rz sy]1Ba% KXR for(int i=1;;i++) hS<x+|'l { 9-L.?LG //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); h{>8W0W* //Utility.log(in.readLine()); !m^WtF sHeader=httpConnection.getHeaderFieldKey(i); 6Lz&"C,` if(sHeader!=null) Le_?x { Bv/v4(G5g if(sHeader.equals("Content-Length")) znu?x|mV { mEE/Olh W nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); y+X%qTB break; AMtFOXx%I } 33
N5> } } {L.0jAwB else HW{+THNj break; BeP0lZ } !f"@pR6 } o<%Sr* catch(IOException e){e.printStackTrace ();} R#Ss_y catch(Exception e){e.printStackTrace ();} F5EKWP 9#pl BtQ** 6IeHZ)jGj Utility.log(nFileLength); ~Uga=& vbh\uv& /A{znE return nFileLength; !o>/gI` } u QCQ$ ;:'A{&0N PBkKn3P3 //保存下载信息(文件指针位置) 'p{>zQ\5 private void write_nPos() Jd)|==yD { Z=wLNm H try{ "rkP@ja9n output = new DataOutputStream(new FileOutputStream(tmpFile)); [t ?ftS output.writeInt(nStartPos.length); !9V_U for(int i=0;i<nStartPos.length;i++) uv._N6mj { /S P^fB*y // output.writeLong(nPos); B;_M52-B output.writeLong(fileSplitterFetch.nStartPos); .K:>`~<) output.writeLong(fileSplitterFetch.nEndPos); G$`/86A ) } 4.R
>mN[ output.close(); &~uzu{ } LVO`+: catch(IOException e){e.printStackTrace ();} -w^E~J0*L catch(Exception e){e.printStackTrace ();} wYNh0QlBH } ].`i`.T N"FQMxqm &K|CH?
D //读取保存的下载信息(文件指针位置) Qs</.PO private void read_nPos() opdi5e)jK { V"\t try{ IDwneFO DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); QiB:K Pz[ int nCount = input.readInt(); Z\`uI+` nStartPos = new long[nCount]; 6(X(f;MEl nEndPos = new long[nCount]; %'@&j2j> for(int i=0;i<nStartPos.length;i++) e|xRK?aVBu { r@k&1*& nStartPos = input.readLong(); hb[K.`g nEndPos = input.readLong(); !=eui$] }
;-U:t4 input.close(); c1!h;(& } F&I^bkvh catch(IOException e){e.printStackTrace ();} # l}Y1^PDd catch(Exception e){e.printStackTrace ();} Y+j|T`d } Smg,1,= q=g;TAXZl /R@eOl}D private void processErrorCode(int nErrorCode) &o:wSe { sIg{a(1/ System.err.println("Error Code : " + nErrorCode); q[7C,o>/ } JZ80 |-c *G2p;n=2 &5c)qap;n //停止文件下载 WVp14Z?k public void siteStop() qKZ~)B j { Bo)w#X bStop = true; O`Nzn~),x for(int i=0;i<nStartPos.length;i++) } n_9d. fileSplitterFetch.splitterStop(); qp'HRh@P2: EXoT$Wt{$ 53@*GXzE } |*jnJWH4: } ~b\bpu //负责部分文件的抓取 ,Q2` N{f **FileSplitterFetch.java .k Gg} */ <.+hV4,3 package NetFox; lc#su$xR> pz#oRuujY CGny#Vh import java.io.*; 'I\bz;VT import java.net.*; jQ(qaX&
2["bS++? y kwS-e public class FileSplitterFetch extends Thread { 1Ep!U#Del U''/y\Z mGwBbY+5n String sURL; //File URL 7WKb|
/#; long nStartPos; //File Snippet Start Position dI{)^ long nEndPos; //File Snippet End Position K'Bq@6@C g int nThreadID; //Thread's ID h@@2vs2 boolean bDownOver = false; //Downing is over D3|y|Dr boolean bStop = false; //Stop identical @e3O=_m- FileAccessI fileAccessI = null; //File Access interface 8v5cQ5Lc ##EMJi [f&ja[m q public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ~UEft { ^4h/6^b0c this.sURL = sURL; <jY"+@rF this.nStartPos = nStart; 0a ZplE, this.nEndPos = nEnd; ggXg4~WL nThreadID = id; z3[
J> fileAccessI = new FileAccessI(sName,nStartPos);//定位 |ILj}4ZA7 } \Om.pOz yiWBIJ2Wu9 r`HtN{6r public void run() ezgP\ct { {D 9m//x while(nStartPos < nEndPos && !bStop) G;>b}\Ng { 9jCn|+ d [6[3B w0q.cj@nd try{ _>S."cm}!k URL url = new URL(sURL); pmv;M`_|R HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); iQ~;to;Y httpConnection.setRequestProperty("User-Agent","NetFox"); D/5 ah_; String sProperty = "bytes="+nStartPos+"-"; sy0|=E*;8" httpConnection.setRequestProperty("RANGE",sProperty); 3#!}W#xv Utility.log(sProperty); Akb#1Ww4 #kR8v[Z T;-&3 InputStream input = httpConnection.getInputStream(); eR$qw#%c* //logResponseHead(httpConnection); 2I3MV:5 ]O,;t> ^M0e 0 byte[] b = new byte[1024]; EuOrwmdj int nRead; &-dyg+b3 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) DZ<q)EpC { & w&JE]$ 5 nStartPos += fileAccessI.write(b,0,nRead); lc?9B //if(nThreadID == 1) ?suxoP% // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /5b,& } 5
<X.1T1 k2(B{x}L ;G|5kvE> Utility.log("Thread " + nThreadID + " is over!"); ,qz$6oxh\ bDownOver = true; S%uwQ!=O8 //nPos = fileAccessI.write (b,0,nRead); *9Ej fs7L } ]+@ @{?0 catch(Exception e){e.printStackTrace ();} VJ8cls< } lyc
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9 } [K1RP. =]X_wA;% ]|KOc& y:I //打印回应的头信息 zy^t95/m public void logResponseHead(HttpURLConnection con) ecfw[4B` { G~b/!clN for(int i=1;;i++) i|?EgGFG { ,UNCBnv1 String header=con.getHeaderFieldKey(i); FZf{kWH if(header!=null) dT?/9JIv //responseHeaders.put(header,httpConnection.getHeaderField(header)); efW< Utility.log(header+" : "+con.getHeaderField(header)); O10,h(O else #fk#RNt break; j?<>y/IR } OE[|1?3 } 5 YjqN %#kml{I *DfwTbg| public void splitterStop() E}LYO: { 4HG;v|Cp bStop = true; XRARgWj } -9W)|toWb" O~D>F*_^j YGFE(t;lPU } 2NMS'"8 g-)izPX @#m@ . /* )nE=H,U?y **FileAccess.java \JjZ _R *//文件访问(定位,写) G(joamfM package NetFox; ' b1k0 9' import java.io.*;
StZ GKY[Q mu`:@7+Yp }^3CG9% public class FileAccessI implements Serializable{ X0G6Wp >8%<ML //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 CCx_|> RandomAccessFile oSavedFile; XLQt>y) long nPos; ul@G{N{L lqdil l\ gkkT<hEV= public FileAccessI() throws IOException -|_#6-9 { X$mCn#8m this("",0); %?
87#| } V&e9?5@ &}}UdJ` fib#)KE public FileAccessI(String sName,long nPos) throws IOException d!>.$|b { vNo(`~]c oSavedFile = new RandomAccessFile(sName,"rw"); T'C^,,if this.nPos = nPos; 'Z;8-1M?O oSavedFile.seek(nPos); :]]#X
~J } X0\O3l*j f)'mpp^ %BBM%Lj public synchronized int write(byte[] b,int nStart,int nLen) ':fq/k3;& { VDy2!0 int n = -1; Kd,8PV*_ try{ K9G1>* oSavedFile.write(b,nStart,nLen); ZH<:g6 n = nLen; oyfY>^bs } 9Kl:3C catch(IOException e) '\g-z { m+m2<|%x e.printStackTrace (); t_ju[xL5B } kn5X:@{ gdr"34%vbM ^\"@r%| return n; ,/%@:Fh4 } SHcFnxEAIH 9Su4nt`i ;zF3e&e( } VAD9mS^~ |!Ryl}Oi Hs6?4cgj /* E@}
NV|90 **SiteInfoBean.java YmwUl> @{ */
}.DE521u package NetFox; PPpq"c IJ[r!&PY |^:qJ;dOP public class SiteInfoBean { qnc?&f Sj(5xa[ ]0dj##5tJ private String sSiteURL; //Site's URL uE'O}Y95 private String sFilePath; //Saved File's Path b@s6jNhVO^ private String sFileName; //Saved File's Name ./l^Iz&0 private int nSplitter; //Count of Splited Downloading File v^0*{7N' =%=lq0GF0 &hnI0m=X public SiteInfoBean() @y ImR+^.7 {//nSplitter的缺省值为5 iY[+BI: //default value of nSplitter is 5 3bU(ea^e$ this("","","",5); Bz+zEXBC } R"2wop %$Smei 5|<j Pc public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ](@HPAG] { kN~:Bh$ sSiteURL= sURL; d}:eLC sFilePath = sPath; <6rc8jYz sFileName = sName; [aS<u`/g| this.nSplitter = nSpiltter; R]LuZN fFe{oR
rGDx9KR4K! } T%Nm '-KYeT\; 14DHU public String getSSiteURL() 5Q$.q&, { iZ( U] return sSiteURL; wJAJ / } *DUP$@}k =:"wU gVscdg5 public void setSSiteURL(String value) je#OV,uHM { !E@4^A80\W sSiteURL = value; UURYK~$K: } `qs[a}%'>" oE.59dx a #`Y(R' public String getSFilePath() G2y`yg { ?h|&kRq return sFilePath; 6k9cvMs%H } S*3*Q l* &l8eljg }nx5 public void setSFilePath(String value) 1Qk]?R/DN { ,L&d\M"f sFilePath = value; $o%:ST4 } %
|^V) pf8M0,AY (ebC80M public String getSFileName() `EdZ { q).["fSV return sFileName; FGey%:p9$ } <y2HzBC GoUsB|-\ [X"pOz public void setSFileName(String value) YwizA}a# {
o|V`/sW{ sFileName = value; % B^BN|r } P _x(`H `i5 \(cdl MLT^7'y public int getNSplitter() UP .4# 1I { r
"uQ| return nSplitter; IY"+hHt } |>zYUT[V 80GBkFjV M*
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public void setNSplitter(int nCount) HT%'dZ1 { w.o>G2u nSplitter = nCount; K6EG"Vv! } 'ju'O#A9 } }bZb8hiG Ly P Cc| ?#~km0~F) /* K41Gn **Utility.java aoHAB<.C */ y!M# #K* package NetFox; OPuty/^!Gw SpC6dkxD\ [/Sk+ID public class Utility { I} .9 s H(io ]|_UpP8EP public Utility() &dky_H { 6o)RsxN eu )#l&BV5 -P:o ^_)g } eA_]%7+` br,xw c //线程睡眠 mFrDV,V public static void sleep(int nSecond) `$t|O&z { D k<NlH zp try{ c5(4rT{(m Thread.sleep(nSecond); rrP_7D } -q30tO. catch(Exception e) 3}2;*:p4Y { lBzfBmEB e.printStackTrace (); ><xJQeW } eb>jT: } lOy1vw' <nU8.?\?~ //日志 {,B.OM)J public static void log(String sMsg) Wud-(19 { q8!X^1F7 System.err.println(sMsg); F4]=(T } `-w, 6 WX*
uhR 8o i{%C&- public static void log(int sMsg) VDFs.;:s { 1*f*}M System.err.println(sMsg); 8?hZ5QvA(j } &~:+2 } d7G
DIYH< Q9Vj8JO"{ 4Opf[3] /* 4I8QM&7 **TestMethod.java wvmcD% */ $It3}?>C' package NetFox; BA8g[TA7K 3b?8<* ye-[l7 public class TestMethod { zF@[S qVW3oj<2 WK5B8u*< public TestMethod() lhX4MB" { ///xx/weblogic60b2_win.exe >dJ[1s] try{ 1i&|}" SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); u7SC_3R //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); VCzb[. SiteFileFetch fileFetch = new SiteFileFetch(bean); G
2`hEX% fileFetch.start(); ++ZP
X'| } a@^)?cH!z catch(Exception e){e.printStackTrace ();} biG :Xn @<3kj
R?j twhT6wz" } >d(:XP6J uO>pl37@ cB)tfS4) public static void main(String[] args) pJJOy { lNz1|nS(Kd new TestMethod(); Y;"jsK{$ } E|A~T7G= } z.|[g$F 点击下载更多相关资料
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