-
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
|
/* Aars\
**SiteFileFetch.java v;\cM/&5 */ RFRXOyGz$ package NetFox; ?xqS#^Z import java.io.*; !+eU import java.net.*; !K( Da 7(jA+ $Y7VA public class SiteFileFetch extends Thread { :%h1Q>F Tv"T+!Z UDI\o1Rbp SiteInfoBean siteInfoBean = null; //文件信息Bean .T3N"}7[ long[] nStartPos; //开始位置 )vO"S long[] nEndPos; //结束位置 5@xR`g- FileSplitterFetch[] fileSplitterFetch; //子线程对象 F\r"Y)|b= long nFileLength; //文件长度 "d)YqQ boolean bFirst = true; //是否第一次取文件 K@7%i|H boolean bStop = false; //停止标志 U*~-\jN1pb File tmpFile; //文件下载的临时信息 ,
@jtD*c) DataOutputStream output; //输出到文件的输出流 MAYb.>X#> 8n5~K.;< //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) R:f!ywj% public SiteFileFetch(SiteInfoBean bean) throws IOException <XLaJ;j { :"Xnu%1 siteInfoBean = bean;
[QxP9EC //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); )!-gT tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ]_(hUj._ if(tmpFile.exists ()) Sesdhuy.@ { lW?}Ts~' bFirst = false; q7lC}'2fu read_nPos(); k( Sda>- } e#/&A5#Ya else QwX81*nx { znE1t%V nStartPos = new long[bean.getNSplitter()]; dXxf{|gk> nEndPos = new long[bean.getNSplitter()]; _$R=F/88 } >h8m)Q y!1X3X,V Jpduk&u UK,bfLPt~ } ?L0;,
\-t 9;LjM ~Ct 4wSZ'RTSR public void run() gfK_g)'2U { +\Vw:~e //获得文件长度 [@9S-$Xa //分割文件 _{`Z?lt //实例FileSplitterFetch >s5}pkAv|e //启动FileSplitterFetch线程 32K& IfV //等待子线程返回 FXo.f<U try{ h)Fc<,vwBE if(bFirst) BX$<5S@ { "a2|WKpD nFileLength = getFileSize(); 4vbGXb}! if(nFileLength == -1) lO cFF0' { -]^JaQw System.err.println("File Length is not known!"); ;+\h$ } Y#c439 & else if(nFileLength == -2) MtL<)?HQ { %j^QK>% System.err.println("File is not access!"); 8$~oiK%fw } @ovaOX else we_CF*zj { ]AA|BeL?| for(int i=0;i<nStartPos.length;i++) !AXLoq$SY { >0@w"aKn nStartPos = (long)(i*(nFileLength/nStartPos.length)); R|*0_!O:[ } CtMqE+j^ for(int i=0;i<nEndPos.length-1;i++) :oy2mi; { {xg=Ym) nEndPos = nStartPos[i+1]; We$
n } 9~`#aQG T nEndPos[nEndPos.length-1] = nFileLength; BeFyx"NBg } bhpaC8| } f~W+Rt7o 9_wDh0b~p JL4E` //启动子线程 C:No ^nH> fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; =-Hhm($n for(int i=0;i<nStartPos.length;i++) .I~:j`K6 { ?<jWEz= fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), s3sRMB2 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 2z{B nStartPos,nEndPos,i); N4;g"k b Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ,j XK fileSplitterFetch.start(); O>~@>/# } |aenQA# // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), JYWoQ[ZO#> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); )A*53>JV // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", c<Cf|W nEndPos = " + nFileLength); p^ (Z // fileSplitterFetch[nPos.length-1].start(); P Ptmh. }e |a03SZx 5{(4% //等待子线程结束 &S
xF"pYV //int count = 0; Zq&'a_ //是否结束while循环 fNi&r0/-t boolean breakWhile = false; ,ASNa^7/> v76P?[ gw"SKp!] while(!bStop) d;>G { 47(_5PFb# write_nPos(); odca? Utility.sleep(500); jR}EBaI} breakWhile = true; /1Gmga5 #W8F_/!n| c/88|k for(int i=0;i<nStartPos.length;i++) JYj*.Q0 { WYF8?1dt + if(!fileSplitterFetch.bDownOver) FR6 W-L { ;+C$EJw- breakWhile = false; GXm#\) break; (b~l.@xh } \},H\kK+^ } QlvP[Jtr if(breakWhile) BPv+gx(>k break; Pqx?0f) jY\z+lW6A >{{ds-- //count++; Fc[vs52 //if(count>4) mCt/\ // siteStop(); \mLEwNhRY } `W}pAmhj '^m'r+B" Ps.xY;Y System.err.println("文件下载结束!"); FVkl#Qy~ } 5uG^`H@X catch(Exception e){e.printStackTrace ();} NsYEBT7f } P9m a$?d_BX ]8wm1_qV //获得文件长度 PeIi@0vA public long getFileSize() j]&Qai~}Y { GU`q^q@Ea int nFileLength = -1; 68GH$ji try{ 0xDn! URL url = new URL(siteInfoBean.getSSiteURL()); m{ani/bt HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); l"JM%LV httpConnection.setRequestProperty("User-Agent","NetFox"); Hd;NvNS K:-jn}i?/ ~D5FnN9 int responseCode=httpConnection.getResponseCode(); {hN\=_6*EW if(responseCode>=400) m4h)Wq { M
2|
k. processErrorCode(responseCode); b=S"o
)> return -2; //-2 represent access is error zQ:nL*X'Z" } &a'mG=(K_c p:b{>lM qF^P\cD String sHeader; +JG05h%' k@%5P-e} >{(c\oMD for(int i=1;;i++) k(tB+k!vH\ { o=94H7@ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); (rJ-S"^u //Utility.log(in.readLine()); yuC$S&Y>! sHeader=httpConnection.getHeaderFieldKey(i); 6d8)] if(sHeader!=null) L"vk ^>E6 { N/WtQSl if(sHeader.equals("Content-Length")) }@6yROy.
{ Q)4[zStR# nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); GQ?FUFuIoW break; !wE% <Fh } >pZ_ } %"c;kvw else <(TAA15Xol break; Ep;?%o ,G } jTqJ(M}L } indbg
d catch(IOException e){e.printStackTrace ();} c{to9Lk.# catch(Exception e){e.printStackTrace ();} Cp!9 "J: ~)$R'= VJ'-"8tY& Utility.log(nFileLength); jqvw<+# ~}p k^FA p`&{NR3+ return nFileLength; s\3]0n9 } c8]%,26. h*KDZ+{) ik?IC$*n3i //保存下载信息(文件指针位置) ^y ', l private void write_nPos() B!`.,3 { BQUYT/$( try{ >Giw\|:f( output = new DataOutputStream(new FileOutputStream(tmpFile)); jxW/"Q output.writeInt(nStartPos.length); xS/=9l/G for(int i=0;i<nStartPos.length;i++) X`&Us { n::i$ZUdK // output.writeLong(nPos); =;n>#< output.writeLong(fileSplitterFetch.nStartPos); `_/1zL[ output.writeLong(fileSplitterFetch.nEndPos); _"D J|j } }Gb^%1%M output.close(); 1$# r)S[* } <oP`\m catch(IOException e){e.printStackTrace ();} 0)PZS> catch(Exception e){e.printStackTrace ();} ZR3sz/ulLd } gjK: a@{
tculG|/ uCW}q.@4 //读取保存的下载信息(文件指针位置) Q$'\_zV private void read_nPos() ;>>:7rdYt { H.n|zGQTB try{ GRL42xp'*D DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 6,CK1j+tZ int nCount = input.readInt(); Yx. t+a- nStartPos = new long[nCount]; #0*I|gfV nEndPos = new long[nCount]; n|=yw6aV' for(int i=0;i<nStartPos.length;i++) b!SIs* { V^.Z&7+E`_ nStartPos = input.readLong(); 2&s(:= nEndPos = input.readLong(); T|oDJ]\J } /Yww G;1 input.close(); Z^mIGy} } %^I 7= catch(IOException e){e.printStackTrace ();} ,-$%>Uv catch(Exception e){e.printStackTrace ();} NJ}xqg } <;b 7~MWp4. U!"RfRD.< private void processErrorCode(int nErrorCode) S)2 U oj { hZe9 Y?) System.err.println("Error Code : " + nErrorCode); 3PzF^ 8KJ } )086u8w )y bX`]<$dr3 xU.Ymq& 5 //停止文件下载 aeLIs SEx public void siteStop() S +73 /Vs { bw#\"uJ bStop = true; s5d[sx for(int i=0;i<nStartPos.length;i++) tUfze9m fileSplitterFetch.splitterStop(); odcrP\S jP3 ~O blbzh';0} } 'i/"D8 } nM$-L.dG //负责部分文件的抓取 @M }`nKXM **FileSplitterFetch.java +x:VIi */ y(K:,CI package NetFox; gd31d s!G a 6fH *2E N~yGtnW import java.io.*; -cXVkH{ import java.net.*; E&W4`{6K4 Zr\G=0` c$hoqi |tD public class FileSplitterFetch extends Thread { y3V47J2o t&bE/i_T .|kp`-F51 String sURL; //File URL Ce3
long nStartPos; //File Snippet Start Position uUG &At long nEndPos; //File Snippet End Position V SH64 int nThreadID; //Thread's ID CBx5:}t boolean bDownOver = false; //Downing is over |-AR)Smt boolean bStop = false; //Stop identical c*>SZ'T\ FileAccessI fileAccessI = null; //File Access interface yF&?gPh& [;INVUwG^ MES| iB public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException I1Gk^wO { ;{>-K8=>$ this.sURL = sURL; b WZX this.nStartPos = nStart; vC5 ( this.nEndPos = nEnd; z1~U# nThreadID = id; Q#$dp fileAccessI = new FileAccessI(sName,nStartPos);//定位 ;%i.@@:IQ } xF9PjnWF= $0E_4#kwB ;V~~lcD&Y` public void run() }JWk? { &]' <M while(nStartPos < nEndPos && !bStop) I03
45Hc { [Hp"a^~r| }"chm=b )N&v.w try{ ]
i\a[3 URL url = new URL(sURL); ;6zp,t0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection ();
?#;zB httpConnection.setRequestProperty("User-Agent","NetFox"); [+$o`0q;N? String sProperty = "bytes="+nStartPos+"-"; ~{O@tt)F httpConnection.setRequestProperty("RANGE",sProperty); <wt9K2, Utility.log(sProperty); W>7 o
ec .hXdXY d5B96;3 InputStream input = httpConnection.getInputStream(); ze%)fZI0f //logResponseHead(httpConnection); HV6'0_R0 ]O;Rzq{D( W%7m3/d byte[] b = new byte[1024]; uO`YA] int nRead; 80ms7 B while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) d~J4&w { wms8z nStartPos += fileAccessI.write(b,0,nRead); u>-!5=D8 //if(nThreadID == 1) 'xp&)gL // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Q|}Pc>ae } Aa/lKiiz lN^} qg>< !=c&U.B Utility.log("Thread " + nThreadID + " is over!"); {utIaMb]&v bDownOver = true; BK:S: //nPos = fileAccessI.write (b,0,nRead); _-I 0f##. } 3F0:v,+; catch(Exception e){e.printStackTrace ();} \TBY)_[ { } "&/&v } I806I@ix 0SziTM G" Fd]' //打印回应的头信息 pYs"Y;% public void logResponseHead(HttpURLConnection con) L$+ap~ld { SW%d'1ya for(int i=1;;i++) 9WuKW*** { vb.`rj6 String header=con.getHeaderFieldKey(i); _,4f z( if(header!=null) =2eG j'} //responseHeaders.put(header,httpConnection.getHeaderField(header)); `cr.C|RT: Utility.log(header+" : "+con.getHeaderField(header)); S)*eAON9 else ^CwzAB break; o5FBqt } obE_`u l# } 93d ht B6b {hsO xe6 2gaT public void splitterStop() n300kpv { nNFZ77lg bStop = true; tXTa>Q } )LwB ~l@SGHx AjZ@hid } JtU/%s ^kMgjS}R F+S;u=CKx /* bg)yliX **FileAccess.java 9c1n *//文件访问(定位,写) DP NUm<> package NetFox; XoaB X2 import java.io.*; f&Bu_r !f\y3p*j 'qhA4W9 public class FileAccessI implements Serializable{ {=><@]N NTVdSK7z~H //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 *r+i=i8{ RandomAccessFile oSavedFile; zKWcDbj long nPos; |T9p#) ec2 }IGr%C(3% kN>AY'1 public FileAccessI() throws IOException x=bAR%i~ { dO e|uQXyD this("",0); tsZrn } $IQ !g A|YqBl qf9.S)H1Z public FileAccessI(String sName,long nPos) throws IOException #]|9aVrr { ge[+/$(1 oSavedFile = new RandomAccessFile(sName,"rw"); S3Tww]q this.nPos = nPos; AtA}OY]D/ oSavedFile.seek(nPos); CBTa9|57 } q7wd9 6G: d]k>7. |YQ:4'^" public synchronized int write(byte[] b,int nStart,int nLen) VWG#v#o { %9=^#e+pE int n = -1; Au"[2cG try{ ;#!`cgAh oSavedFile.write(b,nStart,nLen); lFD$Mc n = nLen; ~'HwNzDQc } Ajhrsa\~a catch(IOException e) g Bq, So { 8lt P)K4 e.printStackTrace (); gRKmfJ*u } +MeEy{; pscCXk(|A` 0%+T U4Xx return n; G;MgrA#\ } <vA^%D<\~ hsljJvs }$;T.[ ~ } l9q
ygh >=i47-H v.,C"^W /* {JzX`Z30l **SiteInfoBean.java 8Hs>+Udl */ yU*j{>%RsK package NetFox; lyx
p: lvb0dOmY VD.p"F(] public class SiteInfoBean { !w98[BE7 +tOBt("5/ s%J|r{F6 private String sSiteURL; //Site's URL r 06}@ 7 private String sFilePath; //Saved File's Path X1i6CEa< private String sFileName; //Saved File's Name :*6tbUp private int nSplitter; //Count of Splited Downloading File NwuME/C7# ~c`@uGw 6,0pkx&Nv public SiteInfoBean() ."PR Z, {//nSplitter的缺省值为5 ;vF8V`f //default value of nSplitter is 5 ~|pVz/s|G this("","","",5); }O@S;[v
S } wr8n*Du %dS7u$Rnh (ZjIwA9> public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) JQE^ bcr { .7Ys@;>B sSiteURL= sURL; @=b0>^\m sFilePath = sPath; As1Er[> sFileName = sName; #*
S0d1 this.nSplitter = nSpiltter; )AqM?FE4R OtF{=7 3.Qf^p } <h
U ZD; HPCgv?E3 7J,W#Ql)5 public String getSSiteURL() }!& w<wR { /^#k/z return sSiteURL; E[t\LTt*n } CjOaw$s B8|=P&L7N o]}b#U8S public void setSSiteURL(String value) M`KrB5a+6 { ()(@Qcc sSiteURL = value; C1|e1 } _1dG!!L_ fmA&1u/xMs ,^,Vq]$3 public String getSFilePath() ^;NM'Z { 1B6Go return sFilePath; ;MCv } dj?.Hc7od u-pE
;| _w^p~To^ public void setSFilePath(String value) C\.? 3 { ?;|$R sFilePath = value; s:R>uGYOd } :I F&W=?9 Nb#E+\q t\{q,4 public String getSFileName() A!<R? { *AGC[w}/ return sFileName; /zuU } '7wI 2D L,waQk / @ ^gH.5L0]gH public void setSFileName(String value) 7u!R 'D { (bH "x sFileName = value; 2j4VW0: } X||oiqbY {;Mcor3 .+ai
dWd public int getNSplitter() 88pz<$ { /Rx%}~x/m return nSplitter; cpFw]w%] } kdQ=% E^1uZI\z RX=C)q2c public void setNSplitter(int nCount) {^"c>'R { }N2T/U nSplitter = nCount; nrwb6wj } X LA } *u
3K8"XZ 6peO9]Zy Nh]eZ3O /* a%;$l_wVT: **Utility.java u~1[nH: */ g}$]K!F package NetFox; WsJ3zZc #R305 q'3= public class Utility { *FK!^Y Z?XE~6aP> vj[
.`fY public Utility() $62ospR^Y { V`S6cmwdc\ GZXUB0W\@) l
K}('7\ } L;fhJ~r O#Xq0o //线程睡眠 S<88>|&n] public static void sleep(int nSecond) /ta-jOcRH& { F FR_1Vf try{ K$#(\-M
Thread.sleep(nSecond); 1xL2f&bG } RQ9fA1YP catch(Exception e) JT[|l-\zo { '<>pz<c e.printStackTrace (); ,U],Wu) } PM7*@~. } HR\yJt < I8hy$+6 //日志 {/XzIOO;b public static void log(String sMsg) p!|Wp { >Ah [uM System.err.println(sMsg); Eae]s8ek9 } ysGK5kFz asj^K|.z -?2ThvT public static void log(int sMsg) ~-A5h( { #&1mc_`/ System.err.println(sMsg); ,D+pGxbr
} g>/,},jv[x } /XS}<!)% P3on4c jNaK] /* rVt6tx
**TestMethod.java db@i*Bf */ h.sH:]Z package NetFox; Pqo"~&Y|~ c:>&Bg&,6T lDCoYX_ public class TestMethod { _j}|R(s*+V vtCt6M vbmi_[,U public TestMethod() 9p+DAs{i { ///xx/weblogic60b2_win.exe CbS- Rz: try{ D;.-e SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); n0>#?ek12 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 9y>dDNM\< SiteFileFetch fileFetch = new SiteFileFetch(bean); GBHv| GO fileFetch.start(); b5No>U) / } ;} Ty b catch(Exception e){e.printStackTrace ();} Z8z.Xn Wf-i)oc4I P`@d8%*; } ;&s`g
?E^~z- pzg|?U public static void main(String[] args) "n}J6 { )ra_`Qdcf new TestMethod(); QO[! } rt_%_f>qd } 4~P{H/] 点击下载更多相关资料
|