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/* n*i&o;5 **SiteFileFetch.java ,\i,2<hz. */ .tHjGx
package NetFox; _00}O+GLM4 import java.io.*; +Z-{6C import java.net.*; kM@e_YtpY %%I:L~c T!Tp:&O- public class SiteFileFetch extends Thread { >o%X;U
3 0M)\([W9& P: L6Zo-J SiteInfoBean siteInfoBean = null; //文件信息Bean :4x6dYNU long[] nStartPos; //开始位置 xi4b;U j long[] nEndPos; //结束位置 $=#Lf[|f= FileSplitterFetch[] fileSplitterFetch; //子线程对象 u~VXe long nFileLength; //文件长度 +]GP"yv- boolean bFirst = true; //是否第一次取文件 d>T8V(Bb boolean bStop = false; //停止标志 8G2QI4 File tmpFile; //文件下载的临时信息 m:Rm(ga9 DataOutputStream output; //输出到文件的输出流 `c|H^*RC "=KFag //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) uhnnjI public SiteFileFetch(SiteInfoBean bean) throws IOException wDSwcNS { xls
US'Eo siteInfoBean = bean; ?R4u>AHS@ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 0v6Z4Ahpo tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); x^i97dZS^" if(tmpFile.exists ()) |/c-~|% { ~|"uuA1/#O bFirst = false; h,-i\8gq read_nPos(); ;j[gE
}
/J Y6S else aIr"!. 4 { 3u 7A( nStartPos = new long[bean.getNSplitter()]; I>w|80%% nEndPos = new long[bean.getNSplitter()]; q4'`qe } WX`wz>KK^ -UAMHd}4 E7.{SGH} Tc>g+eS } /UY'E<wBx [#SO}'1n &B1!,joH~ public void run() Lpnw(r9Y { M0e&GR8<z> //获得文件长度 N6T //分割文件 a@9W'/?igk //实例FileSplitterFetch uINEq{yo //启动FileSplitterFetch线程 D5xTuv9T //等待子线程返回 |%rRALIY try{ _5p]Arg?}& if(bFirst) cg_tJ^vrY { usu{1&g nFileLength = getFileSize(); 3RD+;^}q3 if(nFileLength == -1) Q84XmXm| { `r}a:w- System.err.println("File Length is not known!"); /?|;f2tbV2 }
=i2]qj\ else if(nFileLength == -2) V' i@N { rJtk4hOF System.err.println("File is not access!"); ycEp,V;[Z } CG J_k?h else B4c;/W- { %x}Unk for(int i=0;i<nStartPos.length;i++) ~H[_= { >m=XqtP nStartPos = (long)(i*(nFileLength/nStartPos.length)); N
;n55N } DGz}d,ie for(int i=0;i<nEndPos.length-1;i++) =BV_? { Y9%zo~]-W' nEndPos = nStartPos[i+1]; X*bOE} } /nt%VLms% nEndPos[nEndPos.length-1] = nFileLength; &4M,)Q ( } p}K+4z } |y?W#xb EU Oa8Z O\@0o|NM //启动子线程 ?8<R)hJa< fileSplitterFetch = new FileSplitterFetch[nStartPos.length];
+4D#Ht7 for(int i=0;i<nStartPos.length;i++) ?fpI,WFu { xG'F fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), =}e{U&CX siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), N]|)O]/[ nStartPos,nEndPos,i); "Gq%^^* Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 8lCo\T5" fileSplitterFetch.start(); :D !/.0 } )M56vyo // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !Pd) siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); >k~3W> D // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", _w%{yF6 nEndPos = " + nFileLength); 3Z%jx# // fileSplitterFetch[nPos.length-1].start(); 99b"WH^3$y /BM{tH /AUX7
m.8 //等待子线程结束 Uo|T6N //int count = 0; DM(c :+K- //是否结束while循环 Cv]$w(k boolean breakWhile = false; I5rAL\ y-G <2^
F'bQV XIp>PcU^ while(!bStop)
'^,|8A2 { -}H
EV#ev write_nPos(); #[~f 6s9D Utility.sleep(500); zZPXI&, breakWhile = true; V%FWZn^ v%E! v-B&"XGy: for(int i=0;i<nStartPos.length;i++) fZxEE~Q1 { qtS+01o if(!fileSplitterFetch.bDownOver) 8fb<hq< { 0?'v|5} breakWhile = false; g+KuK`\N% break; .:SY:v r } :g)`V4% } oJ0ZZu?{D if(breakWhile) @t3I}mc break; zj#8@gbh+ wf,w%n _Xfn //count++; 'w`9lIax //if(count>4) KhNOxMZ // siteStop(); j\uPOn8k } oP`Qyk 1&utf0TX6q $1bzsB|^ System.err.println("文件下载结束!"); HP[M"u } Z!oq2,ia catch(Exception e){e.printStackTrace ();} p-2PC{% t| } SG-Xgr@ l1"* I?Q[ZH:M //获得文件长度 M}N[> ,2' public long getFileSize() *#sY-G d { kD_616 int nFileLength = -1; RH0J#6C/ try{ k6^!G " URL url = new URL(siteInfoBean.getSSiteURL()); aQL$?, HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 80Z'1'u0 httpConnection.setRequestProperty("User-Agent","NetFox"); !2]'S=Y n~?n+\.&a WXJ%hA int responseCode=httpConnection.getResponseCode(); vptBDfzz if(responseCode>=400) 0GMov]W?i { OEXa^M4x
processErrorCode(responseCode); `fq# W#Pu return -2; //-2 represent access is error )~ghb"K } ~zL DLr= t4r%EP|Zt 7uxUqM String sHeader; \EQCR[7qu7 =4:]V\o):' m 9.BU2. for(int i=1;;i++) ko`.nSZ-k { ,?`Zrxe[ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); N:&EFfg3 //Utility.log(in.readLine()); cxn*!TwDs sHeader=httpConnection.getHeaderFieldKey(i); %p8#pt\$7 if(sHeader!=null) G"nGaFT~ { V D.T=( if(sHeader.equals("Content-Length")) .[C@p`DZ { T1g3`7C3 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); <@J0
770 break; Q>
J9M`a } 4s7&*dJ } ID8u&: else ((mR'A|` break;
Ula
h!s } bSj-xxB]e } ] Wx?k7T catch(IOException e){e.printStackTrace ();} ]lZg }7h catch(Exception e){e.printStackTrace ();} .1A/hAdU ND\M ANq3r( Utility.log(nFileLength); ['Y"6[1 u{%dm5 )h`8</#m{ return nFileLength; PHxNo) } K2!GpGZu x<\5Jrqt {B7${AE //保存下载信息(文件指针位置) 7,"y!\ private void write_nPos() F-%Hw { X|dlVNL8p try{ i>%A0.9 output = new DataOutputStream(new FileOutputStream(tmpFile)); p&k%d, * output.writeInt(nStartPos.length); A&D<}y/% for(int i=0;i<nStartPos.length;i++) @|EWif| { g<g$c<sm // output.writeLong(nPos); Ox9M![fC output.writeLong(fileSplitterFetch.nStartPos); UM:]QbaIn output.writeLong(fileSplitterFetch.nEndPos); V-kx=M"k } ~'w]%rh! output.close(); vE&K!k` } kc/" catch(IOException e){e.printStackTrace ();} o^v]d7I8b catch(Exception e){e.printStackTrace ();} 9Xh1i`.D } YT}ZLx N^4CA@'{ bi[g4,`Z; //读取保存的下载信息(文件指针位置) rUh2[z8: private void read_nPos() $V,ZH*
g { W#kd[Wi try{ ~-
eB DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); oaG;i51! int nCount = input.readInt();
*JF7 B nStartPos = new long[nCount]; PFjh]/= nEndPos = new long[nCount]; WOi+y for(int i=0;i<nStartPos.length;i++) SvQ!n4 $ { =
( 4l nStartPos = input.readLong(); N"s"^}M\ nEndPos = input.readLong(); l'7'G$v } kK=f@l input.close(); @cc}[Uw4B } lC@wCgc catch(IOException e){e.printStackTrace ();} BAojP1}+, catch(Exception e){e.printStackTrace ();} XbIxGL } QL:Qzr[ -J>f,zA ndu$N$7+ private void processErrorCode(int nErrorCode) %k @4}M> { PLq]\y System.err.println("Error Code : " + nErrorCode); =!u]t&yv } .rQcg.8/B |E&|6h1 VFq7nV/O //停止文件下载 (-xVW#39 public void siteStop() e5(c,,/ { W&HxMi bStop = true; Vi#[kn' for(int i=0;i<nStartPos.length;i++) cZ3A~dTOR fileSplitterFetch.splitterStop(); `+i/rc1. .E;}.X 0E9 lv"3o } #'.
' |z } eoJ*?v //负责部分文件的抓取 ^UBzX;|p **FileSplitterFetch.java Y$_^f*sFn */ k ~4o`eA package NetFox; pm2] JFq<sY! D;z!C
ys import java.io.*; iD/+#UTY import java.net.*; \H
5t-w= Y.kc,~vYL WR_B:%W. public class FileSplitterFetch extends Thread { -`$J& YU <pM6fI6BD &~'i,v|E String sURL; //File URL `Om
W#\ long nStartPos; //File Snippet Start Position #mD_<@@ long nEndPos; //File Snippet End Position 0^)~p{Zh int nThreadID; //Thread's ID OS1f}< boolean bDownOver = false; //Downing is over `|mV~F| boolean bStop = false; //Stop identical ,+X:#$ FileAccessI fileAccessI = null; //File Access interface 8:2Vib$ eN`G2eE PP]7_h^2 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException {asq[;] { v=cX.^L this.sURL = sURL; OTNI@jQ) this.nStartPos = nStart; v^ v \6uEP this.nEndPos = nEnd; eI%kxqc nThreadID = id; dF5y'
R' fileAccessI = new FileAccessI(sName,nStartPos);//定位 w-C%,1F,/ } +G+1B6S d^`;tD UID`3X public void run() y1[@4TY] { "p+JME( while(nStartPos < nEndPos && !bStop) }}bMq.Q' { [.6bxK 4vNH"72P 8L]Cc!~ try{ f8G<5_!K_ URL url = new URL(sURL); ?$y/b}8 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); qn'TIE. httpConnection.setRequestProperty("User-Agent","NetFox"); Mb45UG#2 String sProperty = "bytes="+nStartPos+"-"; b$- g"F httpConnection.setRequestProperty("RANGE",sProperty); F!w|5,) Utility.log(sProperty); s#8T46? DyA1zwp} NiQ Y3Nj InputStream input = httpConnection.getInputStream(); y\[q2M< //logResponseHead(httpConnection); L+eK)Q b *3h}n; j?g#8L;W\w byte[] b = new byte[1024]; +}Mm5^6* int nRead; "-j96
KD while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) BuUM~k&SY { NG23 nStartPos += fileAccessI.write(b,0,nRead); =
uepg@J //if(nThreadID == 1) P*OT&q // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Om_ "X6 } (+<66
TO s6#e?5J THB[(3q Utility.log("Thread " + nThreadID + " is over!"); A
PrrUo bDownOver = true; ~yV?*"Hi //nPos = fileAccessI.write (b,0,nRead); qT&zg@m } E*kZGHA catch(Exception e){e.printStackTrace ();} &> R:oYN } d`%7Pk } 9l:[jsk<d P"Z1K5>2L >%slzr //打印回应的头信息 }mI0D>n public void logResponseHead(HttpURLConnection con) Vup|*d2r0E { zAev@+.ld for(int i=1;;i++) {xTh!ih2- { ~:|V,1 String header=con.getHeaderFieldKey(i); cIK4sOTJ& if(header!=null) FMzG6nrdBN //responseHeaders.put(header,httpConnection.getHeaderField(header)); NzN"_o jM Utility.log(header+" : "+con.getHeaderField(header)); ~-uDN) else fu-,<m{ break; 4vkqe6 } QIJ/'72 } {~G~=sC$ rV?@Kgxi )n[=)"rf public void splitterStop() ^g"p}zf
L" { }wI+eMr bStop = true; <'BsQHI } ,p!IFS` Lf%}\0: -8dz`o} } YN7`18u Prc1U)nfo Md8<IFi9]Q /* {.DY\;Q **FileAccess.java QXO~DR1 *//文件访问(定位,写) %|>D{q6C package NetFox; Y^;izM} import java.io.*; u1d%wOY +Hp`(^( ;vbMC74J# public class FileAccessI implements Serializable{ CC3M7|eO3 e<FMeg7n //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 8!@}\6qM RandomAccessFile oSavedFile; 17 0r 5 long nPos; ;:>q;% !\O!Du 2^w{Hcf public FileAccessI() throws IOException @2-;,VL3 { L]&y[/\E1 this("",0); 8U4In[4 } !4 lN[ #\ysn|!J, " SP6o public FileAccessI(String sName,long nPos) throws IOException |x>5 T} { [F(iV[n% oSavedFile = new RandomAccessFile(sName,"rw"); `U>2H4P this.nPos = nPos; 9\=SG"e( oSavedFile.seek(nPos); Q&"oh } NzeiGj ]&`=p{Z v(Sh+p public synchronized int write(byte[] b,int nStart,int nLen) rw0s$~' { E\cX int n = -1;
o)DO[ try{ gr{*wYL oSavedFile.write(b,nStart,nLen);
W/~q%\M { n = nLen; ya,-Lt } In+2~Jw/2! catch(IOException e) i&DUlmt)f { ?32i1F! e.printStackTrace (); 8F's9c, } U\-.u3/ '
~fP#y XdOntP *a return n; CVEo<Tz } #uCfXJ- >g@@ yR, "ctZ"* } cR*~JwC: aVr =7PeF DnW/q /* 9RkNRB)8 **SiteInfoBean.java Ae"|a_>fMI */ tYSfeU package NetFox; 036QV M$ &fU48n1Uh )p:+!sX( public class SiteInfoBean { )V*`(dn'zm /g!Xe]Ss CJs
~!ww private String sSiteURL; //Site's URL h]&~yuI> private String sFilePath; //Saved File's Path (XFF}~>B. private String sFileName; //Saved File's Name yMD0Tj5ZQ private int nSplitter; //Count of Splited Downloading File >Ad`_g6Wew 'Z#>K* [~`p~@\+ public SiteInfoBean() P.1Z@HC {//nSplitter的缺省值为5 }Gx@1)?? //default value of nSplitter is 5 D>Rlm,U this("","","",5); Q:b0! } 7m?fvKy VRSBf;? &yOl}?u public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) S?OCy4dk: { Q|2*V1"r<2 sSiteURL= sURL; ~lqNWL^l sFilePath = sPath; Z,M2vRj"qT sFileName = sName; >!tfvM2X{ this.nSplitter = nSpiltter; 6Lg#co}9 4p6T0II_$ C^,J6;' } `G:hC5B B+pLW/4l X gtn}7N. public String getSSiteURL() Y@T$O<* { lZ <D,& return sSiteURL; aOsc_5XDR; } Rz6kwh=q N$.ls48a4- ilZ5a&X; public void setSSiteURL(String value) w]V684[> { I'N!j>5oX sSiteURL = value; ,_=LV } \nL@P6X 'GO*6$/ .SOCWznb public String getSFilePath() X?/32~\ { mGoC8t}iP return sFilePath; K
6,c||#< } !FB2\hiM d(|4 +^> oU*e=uehj public void setSFilePath(String value) PQz[IZ { C]ax}P>BQ sFilePath = value; k
,r*xt } s5MG#M 9 Q
trU_c2k LJt5?zQKrW public String getSFileName() <7/7+_y { T?`Ha\go return sFileName; BAT.> } .cmhi3o4 `/WOP`'zM H$
:BJ$x@ public void setSFileName(String value) -Q ];o~ { [DTe sFileName = value; <Oy2JjY } &[yYgfsp zhyf}Ta' Q2Uk0:M public int getNSplitter() m+ #G* { )]m4FC: return nSplitter; i"E_nN"V } 87KSV"IU8 KQ(S\ Kf$6D 79# public void setNSplitter(int nCount) ^lK!tOeO { zNEN[ nSplitter = nCount; Us> } u(ETc*D] } zXwdU58 Oj2=& uz &@PAv5iNf /* l[nf"' **Utility.java =H}}dC<) */ Ie8K[ > package NetFox; 'w|N}
4 vQDR;T"] 90H/Txq public class Utility { )>;387'Y |I.5]r-EK |(Xxi public Utility() 'sk M$jr { i}))6 V:AA{< &kH7_Lz } :/}=s5aQl/ S7R*R} //线程睡眠 HDs8 M public static void sleep(int nSecond) z qd1G(tO { KXu1%`x=%Z try{ Nk9w;
z& Thread.sleep(nSecond); =]<X6!0mR } mDWRYIuN catch(Exception e) Maiy d { #"o`'5 e.printStackTrace (); AJP-7PPD } _Vr}ipx-k } +^4HCyW eHyIFoaC/ //日志 1L3 $h0i public static void log(String sMsg) 7TZ,bD_ { /T 4GPi\lg System.err.println(sMsg); ORfMp'uP= } h>/L4j*Z pJQ_G`E R~#&xfMd. public static void log(int sMsg) 3C#Sr6 { 36 ]?4, . System.err.println(sMsg); (%{!TJg ZR } &tlU.Whk+ } \YH*x` !\q'{x5C
_+&/P& /* 4uv*F:eo **TestMethod.java DM{Z#b] */ XeAH.i< package NetFox; }wGy#!CSza e~$aJO@B.R kg$w<C@#" public class TestMethod { YA8ZB&]En/ -.UUa j|y"Lcq public TestMethod() FF30VlJ { ///xx/weblogic60b2_win.exe ^=w){]G try{ <\?dPRw2> SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); &3YXDNm //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); .[vYT.LE SiteFileFetch fileFetch = new SiteFileFetch(bean); R^6^{q fileFetch.start(); M` |E)Y } q>VvXUyK, catch(Exception e){e.printStackTrace ();} -$(2Z[ <+ckE2j Jrx]/CM } L!:;H, Bvz&
p)( p+:MZP -%( public static void main(String[] args) ?"T *{8 { ]hY4
MS new TestMethod(); uBo~PiJ2" } ?qczMck_ } _z&H O 点击下载更多相关资料
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