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/* s,Swlo7D! **SiteFileFetch.java 0YL0Oa+7 */ AqkK`iJ# package NetFox; fW
_. import java.io.*; 0=B5
=qyw import java.net.*; gISs+g ${wE5^ky MeX1y]<It public class SiteFileFetch extends Thread { BpT&vbY BXY'%8q _a \Hd B SiteInfoBean siteInfoBean = null; //文件信息Bean F!{SeH: long[] nStartPos; //开始位置 R.N*G]K5 long[] nEndPos; //结束位置 OxZ:5ps FileSplitterFetch[] fileSplitterFetch; //子线程对象 &UR/Txnu long nFileLength; //文件长度 U:r2hqegd boolean bFirst = true; //是否第一次取文件 OT i3T1& boolean bStop = false; //停止标志 BP$#a
# File tmpFile; //文件下载的临时信息 vvxj{fxb) DataOutputStream output; //输出到文件的输出流 4(82dmKO ny= {V*m //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) R
28* public SiteFileFetch(SiteInfoBean bean) throws IOException Mk[`HEO { YqgW8EM siteInfoBean = bean; k6BgY|0g C //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); R`q!~8u tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Oe`t!&v if(tmpFile.exists ()) <Tf;p8# { z7C1&bGe bFirst = false; =*jcO119L read_nPos(); x3|'jmg } yxbTcZ else ?W_U{=anl { @g~sgE}# nStartPos = new long[bean.getNSplitter()]; aehMLl9cl nEndPos = new long[bean.getNSplitter()]; `'WLGQG } #9OP.4 s jm79/ W+?[SnHL/ 9DX3]Z\7X } ,6"n5Ks} 98^6{p "'Uk0>d=_I public void run() B:cOcd?p { fx:KH:q3 //获得文件长度 6l'y //分割文件 h>0<@UP //实例FileSplitterFetch %<yM=1~> //启动FileSplitterFetch线程 M7,MxwZ0k //等待子线程返回 >N-% try{ mC92J@m/L! if(bFirst) PBtU4) { E e>j7k.G. nFileLength = getFileSize(); uW=NH;u if(nFileLength == -1) "~C#DZwt{ { D|9fHMg% System.err.println("File Length is not known!"); vWs c{9 } (}1f]$V else if(nFileLength == -2) VAGMI+ - { 4tJ4X' U System.err.println("File is not access!"); 0!`7kZrN } ~e9INZe-j else ]bb}[#AY { C}_:K)5q for(int i=0;i<nStartPos.length;i++) Y{RB\}f( { F*VMS nStartPos = (long)(i*(nFileLength/nStartPos.length)); vp-7>Wj } [oLQd-+
for(int i=0;i<nEndPos.length-1;i++) XS8~jBjx { j9'XZq} nEndPos = nStartPos[i+1]; X@U1Ri } :<k|u!b}y nEndPos[nEndPos.length-1] = nFileLength; c0q) } 4!vUksM } O7'3}P; @n*D>g k=2l9C3Z //启动子线程 _PUm
Pom. fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Gj`Y2X2r for(int i=0;i<nStartPos.length;i++) N09+id g { Mk/!,N<h# fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), i03}f%JnuO siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ^jjJM| a nStartPos,nEndPos,i); pm@Z[g Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); x*8f3^ wE fileSplitterFetch.start(); E(kpK5h{ } O>M*mTM // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), #UCQiQfP siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); yVQz<tX| // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", R+VLoz*J6 nEndPos = " + nFileLength); \Rqh|T<D // fileSplitterFetch[nPos.length-1].start(); N 3p 7 0 ."Ix#\|x g*?+~0"`Y //等待子线程结束 =GKYroNM //int count = 0; GtJ*&=( //是否结束while循环 $1zeY6O boolean breakWhile = false; 'O2#1SWe XW_xNkpL5c Tv,. while(!bStop) 9$V_=Bo { VfqY_NmgC write_nPos(); a {$k<@Ww Utility.sleep(500); 0k0c breakWhile = true; i z>y u[| .L5*E(<K0 y<%.wM]-J for(int i=0;i<nStartPos.length;i++) )]?egw5l { .4re0:V if(!fileSplitterFetch.bDownOver)
i~B@(, { = #2qX>? breakWhile = false; ^}/
E~Sg7\ break; 3r:)\E+Q_ } *r,&@UB } <&s)k if(breakWhile) w[7.@ %^[ break; J*~2:{=% gq_7_Y/ A='+tJa //count++; dwbY"t[9 //if(count>4) *RbOQ86vP // siteStop(); UoMWn"ZE } W;oU +z^t$ x$?7)F&z LF)a"Sh System.err.println("文件下载结束!"); Y:!/4GF } xCp+<|1 catch(Exception e){e.printStackTrace ();} ?~JxO/K } MRg\FR2>1 |8qK%n f} N'
$DE //获得文件长度 v7<S F public long getFileSize() 5*wApu{2A { h9BD
^j int nFileLength = -1; 'Rkvsch try{ r;on0wm&B URL url = new URL(siteInfoBean.getSSiteURL()); CziaxJ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); x"llX httpConnection.setRequestProperty("User-Agent","NetFox"); JdUz!=I B?lBO
V4v4 g3~~"`2 int responseCode=httpConnection.getResponseCode(); :O'C:n<g if(responseCode>=400) Uq]EJu { 9p\Hx#^ processErrorCode(responseCode); MHnf\|DX return -2; //-2 represent access is error Dj
]Hgg } mj~N]cxB y }&4HrT& <% 7P String sHeader; }y-;>i#m=g |
2.e0Z]k e8ULf~I for(int i=1;;i++) o~o6S=4,} { cbu nq" //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,+\4
'` //Utility.log(in.readLine()); *0&4mi8 sHeader=httpConnection.getHeaderFieldKey(i); by|?g8 if(sHeader!=null) 9 yW~79n { N5f0|U& if(sHeader.equals("Content-Length")) tf7v5iG e { #7~tL23}] nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); I*:qGr+ WJ break; J|"nwY}a9 } s
la*3~?* } ])QO% else jV4hxuc$ break; VM!-I8t } ~N{_N95!2@ } uhTKCR~ catch(IOException e){e.printStackTrace ();} t(j_eq}J catch(Exception e){e.printStackTrace ();} ,a9D~i 9R *dG}R#9Nv FYXw$7'l Utility.log(nFileLength); T\2) $ ;zZ ,3pl-E o%Uu.P return nFileLength; >
h,y\uV1 } N
/sEec 2Ft8dfdm` k(-Z@ //保存下载信息(文件指针位置) CQBT:: private void write_nPos() $^vp'^uW> { J@ktj( try{ Z:UgozdC output = new DataOutputStream(new FileOutputStream(tmpFile)); 'NT#(m% output.writeInt(nStartPos.length); @)OnIQN~ for(int i=0;i<nStartPos.length;i++) ~@-QbkC { Tsm1C#6 Y* // output.writeLong(nPos); JNxW6 cK output.writeLong(fileSplitterFetch.nStartPos); UzU-eyA output.writeLong(fileSplitterFetch.nEndPos); q,;".3VQ } W$ JY M3! output.close(); :cXIO } Avs7(-L+s catch(IOException e){e.printStackTrace ();} 8S.')<-f catch(Exception e){e.printStackTrace ();} W+d9cM= } ~A[YnJYA# 8/Et&TJ` IOsXPf9@ //读取保存的下载信息(文件指针位置) ?JXBWB4 private void read_nPos() 670J{b { pAJ=f}",]E try{ j*;*Ka w DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); %;pD8WgJA int nCount = input.readInt(); C
'B4 mmC nStartPos = new long[nCount]; j<l#qho{h nEndPos = new long[nCount]; k
Zk .]b for(int i=0;i<nStartPos.length;i++) !y>lOw})Q { yfSiByU nStartPos = input.readLong(); DC$7B`#D nEndPos = input.readLong(); 6C:x6'5[ } kf+JM/ input.close(); q3c*<n g# } Yw~;g:= catch(IOException e){e.printStackTrace ();} ",~ b2]ym catch(Exception e){e.printStackTrace ();} ]PR|d\O } K,x$c % tr}KPdE PoYr:=S? private void processErrorCode(int nErrorCode) 2j8Cv:{Nn% { sTKab
: System.err.println("Error Code : " + nErrorCode); 'v'`
F*6 } xNC* ]8d -d|BO[4j 5wzQ?07T_ //停止文件下载 Hi]vHG( public void siteStop() ojN`#%X { a);O3N/*I bStop = true; { A:LAAf[6 for(int i=0;i<nStartPos.length;i++) H/^~<U#p fileSplitterFetch.splitterStop(); _, \y2&KT (g%JK3 ]~?S~l% } 5"1!p3`\D{ } /yx=7< //负责部分文件的抓取 Jq#[uX **FileSplitterFetch.java 8_"3Yb`f */ "NxOOLL package NetFox; J*}VV9H ijvNmn1k r@|R-Binz import java.io.*; m3U+ du import java.net.*; ^D9
/ -,R0IGS nHI(V-E2:H public class FileSplitterFetch extends Thread { >:.w7LQy/ xh{mca>?G 5>'?:jY String sURL; //File URL
fkW3~b long nStartPos; //File Snippet Start Position ,"@w>WL<9 long nEndPos; //File Snippet End Position (3AYy0J% int nThreadID; //Thread's ID rQ=xcn[A boolean bDownOver = false; //Downing is over MPjr_yc] boolean bStop = false; //Stop identical hA@zoIoe FileAccessI fileAccessI = null; //File Access interface nped lN);~|IOv7 ?$<SCN= public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException d-hbvLn { XXXljh6 this.sURL = sURL;
s0gJ f[ this.nStartPos = nStart; n)tU9@4Np this.nEndPos = nEnd; B:e.gtM5 nThreadID = id; vAi"$e fileAccessI = new FileAccessI(sName,nStartPos);//定位 vz6SCGg, } &K06}[J kXigX- b+W)2rFO public void run() XlRw Z/Wc { W7%p^;ZQ$ while(nStartPos < nEndPos && !bStop) HpW"lYW4 { T48BRVX-F F\;2i:( ]AFj&CteZ/ try{ !K!)S^^Po? URL url = new URL(sURL); -_s%8l^ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); DD2adu^ httpConnection.setRequestProperty("User-Agent","NetFox"); o(:{InpV%A String sProperty = "bytes="+nStartPos+"-"; !{$qMhT httpConnection.setRequestProperty("RANGE",sProperty); mRwXN*Izw Utility.log(sProperty); :}^Rs9 ' GNs#oM dI!8S InputStream input = httpConnection.getInputStream(); w"q-#,37j //logResponseHead(httpConnection); +IvNyj| 6@&fvf n.@#rBKZ byte[] b = new byte[1024]; aZP2R" int nRead; kl| g while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 3*G5F}7%= { jz|VF,l nStartPos += fileAccessI.write(b,0,nRead); Cm^Ylp //if(nThreadID == 1) HB%K|&!+ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 7@JjjV } 6j_ 678 miwf&b aXC!t Utility.log("Thread " + nThreadID + " is over!"); yGRR8F5>( bDownOver = true; M/*Bh,M` //nPos = fileAccessI.write (b,0,nRead); (m6EQoW^s+ } 8IeI0f"l) catch(Exception e){e.printStackTrace ();} '[%jjUU } [@ILc*2O } 3] N q@t wXz\NGW >A<Df //打印回应的头信息 *E.LP1xP public void logResponseHead(HttpURLConnection con) +.=1^+a { U4=]#=R~o for(int i=1;;i++) NJk)z&M { AHq M7+r9 String header=con.getHeaderFieldKey(i); Is
ot4HLM if(header!=null) iZC>)&ax //responseHeaders.put(header,httpConnection.getHeaderField(header)); KVg[#~3 Utility.log(header+" : "+con.getHeaderField(header)); ?gU }[] else _wmI(+_ break; xg?auje } }*h47t} } DjY8nePyE
P`tyBe#= \Fq1^ 8qa public void splitterStop() hv3;irK]& { <Kg2$lu(_` bStop = true; >}CEN } @`6}`k .wP/ai>} e#1.T } alVdQfu 3EI]bmi~ S.1(3j* /* 7H4L-J3 **FileAccess.java Y|_O8[ *//文件访问(定位,写) ]Y{,N x package NetFox; =x1Wii$` import java.io.*; #,TELzUVE -;vT<G3 0 k9<& public class FileAccessI implements Serializable{ se#@)LtZ &~'S)Nun //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 [z2eCH RandomAccessFile oSavedFile; S!`:E long nPos; VNO'="U \X5 3|Y;= ';Nu&D#Ph public FileAccessI() throws IOException _W}(!TKO { ^zgacn this("",0); ?,>5[Ha^? } 8TW5(fl C s#w72N JYQ.EAsr! public FileAccessI(String sName,long nPos) throws IOException )nOE8y/ { ctHEEFWm oSavedFile = new RandomAccessFile(sName,"rw"); F{\=PCZ>7 this.nPos = nPos; @y5= J`@= oSavedFile.seek(nPos); =DC3a3&% } ~;8I5Sge x}|+sS,g FfG%C>E6~ public synchronized int write(byte[] b,int nStart,int nLen) V9Hl1\j^ { .;g}%C int n = -1; IT18v[-G try{ rI>LjHP oSavedFile.write(b,nStart,nLen); y6FKg) n = nLen; )b9_C
O} } r8,om^N6 catch(IOException e) @D]lgq[ { yPN+W8}f e.printStackTrace (); W~yLl% } s&VOwU `BjR.xMv Zw#<E
=\ return n; |mOMRP#' } :v)6gz(p L#2ZMy
Bzw19S6y } {[P!$
/ M*(H)i;s:w \7 Gz\=\LR /* tF%QH[ **SiteInfoBean.java uXpv*i{R */ '%&z.{ package NetFox; @vt$MiOi N571s ,56;4)cv public class SiteInfoBean { WqQU@sA $UC {"0 /NU103F yt private String sSiteURL; //Site's URL ke]Yfwk private String sFilePath; //Saved File's Path G?ig1PB"# private String sFileName; //Saved File's Name {m[Wyb( private int nSplitter; //Count of Splited Downloading File n}q$f|4! 0X>T+A[E uY]0dyI public SiteInfoBean() |'$ l7 {//nSplitter的缺省值为5 ?oKL&I@ //default value of nSplitter is 5 I .P6l*$ this("","","",5); NbkK&bz } 'Wp@b678 dp<$Zw8BE vBoO'l9'M public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 9yL6W'B! { \=fh-c(J, sSiteURL= sURL; q:]Q% IC^ sFilePath = sPath; m#n]Wgp' sFileName = sName; 8wmQ4){ this.nSplitter = nSpiltter; x<>YUw8` P)hi||[ ;_N5>3C: } aq$q
~,E p[qg&VKB yWY|]Pp public String getSSiteURL() J>h;_jA { EEwWucQ return sSiteURL; c1#+Vse } 7n&yv9" p+ Lv=e)0u 2*'ciH37 public void setSSiteURL(String value) ]0-<> { sLhDO'kM sSiteURL = value; zJCEA }
KGT3|)QN `eD1|Go9 MI*Sq\-i public String getSFilePath() &F6C { :0I
l|aB return sFilePath; Q0>q:aj\ } 'RLOV CXAVGO'xw |}Ph"g2D, public void setSFilePath(String value) &,MFB { m\-PU z&C sFilePath = value; s)w9% } X<euD9? mb{q(WEPP YgimJsm public String getSFileName() ~ffwLgu!
{ Mudrg[@` return sFileName; JA6";fl; } :<utq|#s doLNz4W wW5Yw
i public void setSFileName(String value) i/$SN-5}1 { ,YB1 y)x sFileName = value; |^Kjz{ } .8H}Lf\ 8xTix1u0 vYnftJK& public int getNSplitter() >>7aw" 0 { BY(
eV! return nSplitter; uJ8{HB } |GuEGmR (/?R9T[V&^ S#2[%o public void setNSplitter(int nCount) 2w4MJ,Uw { Dbz]{_Y; nSplitter = nCount; 0roCP=; } QO,+ps< } Ac\W\=QvB <|H?gfM WQKj]:qk0 /* /gw Cwyo **Utility.java %rcFT_ */ T4GW1NP package NetFox; N`1r;%5 VMHC/jlX@r Zi4d] public class Utility { =DMbz`t 28oJFi] UvBnf+, public Utility() ug&92Hdvy3 { ny1 \4C tlGWl0V?7Q it,w^VU_] } 7zGMkl &yLc1#H //线程睡眠 O?E6xc<8 public static void sleep(int nSecond) TSQhX~RN { Tl3"PIb try{ 6K 4+0xXv Thread.sleep(nSecond); YoAg } f:vD`Fz1 catch(Exception e) RIjM(P { D]u=PqHk2 e.printStackTrace (); *P xf#X }
#T"64%dX } QJSr:dP4dG ;BVDt //日志 } yq public static void log(String sMsg) euZI`*0 { -3vh!JMN System.err.println(sMsg); 968^ "T# } ,sI35I J $?f]ZyZr. =P]GPEz_ public static void log(int sMsg) !nzGH*td { PEzia}m System.err.println(sMsg); @?a4i } W~NYU } }n[Bq# 7I3 :u+ Jck"Ks /* kl<g;3 **TestMethod.java )
,Npv3( */ 2.qpt'p[ package NetFox; 0N5bPb !Uy>eji} )!,@m>0v{ public class TestMethod { j38 6gL +c?ie4 7K :FeW'N public TestMethod() all*P #[X { ///xx/weblogic60b2_win.exe CQ1 8%w6 try{ iZC`z
} SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); X6kaL3L} //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); |Puj7Ru SiteFileFetch fileFetch = new SiteFileFetch(bean); 0jTMZ<&zZ fileFetch.start(); j_c+.iET } OjATSmZ@@ catch(Exception e){e.printStackTrace ();} FmI;lVF0j <kbnu7?a* q+%!<]7X } UkfA}b^@v b1)\Zi v,0<9!'v public static void main(String[] args) })7K S? { /7vE>mSY new TestMethod(); 0WXVc } **HrWM%?8o } !NA`g7' 点击下载更多相关资料
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