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/* +Px<DX+ **SiteFileFetch.java @Wlwt+;fT */ J?UZN^ package NetFox; !IQfeoT import java.io.*; Iltg0`
import java.net.*; 98<bF{#0WM QqT6P`0u N
P0Hgd public class SiteFileFetch extends Thread { ~50y- ]-+.lR%vd9 w7.?zb !N SiteInfoBean siteInfoBean = null; //文件信息Bean
B[2h long[] nStartPos; //开始位置 Oa3=+_C~$1 long[] nEndPos; //结束位置
.jrR4@ FileSplitterFetch[] fileSplitterFetch; //子线程对象 /I`!iK long nFileLength; //文件长度 %<bG%V( boolean bFirst = true; //是否第一次取文件 >V ]*mS%K boolean bStop = false; //停止标志 LmT[N@>" File tmpFile; //文件下载的临时信息 EzeDShN=J DataOutputStream output; //输出到文件的输出流 ~L Bq5a U- U V<} //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) \M1M2(@pDJ public SiteFileFetch(SiteInfoBean bean) throws IOException >(1_Dn\ { F"HI>t)> siteInfoBean = bean; 1zEZ\G //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); IJb1)
ZuR tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 0ga1Yr] if(tmpFile.exists ()) 8=zM~v) { 3T.M?UG> bFirst = false; AcfkY m~ read_nPos(); dp%pbn6w } 4jyr\=42F' else 8bKWIN g_n { H--*[3". nStartPos = new long[bean.getNSplitter()]; 1RUbY>K#U nEndPos = new long[bean.getNSplitter()]; TG%hy"k } ,oi`BOh ?H86Wbz CFS3);'<| |?t8M9[Z } "}~i7NBB tX`[6` 2ZzD^:V[} public void run() '2qxcc o { ^TCJh^4na //获得文件长度 xvz5\s|b //分割文件 ^*UfCoj9Z //实例FileSplitterFetch ;h(;( //启动FileSplitterFetch线程 +]~w ?^h //等待子线程返回 }+RF~~H/ try{ <[B[ if(bFirst) }.|5S+J?[ { 5`{;hFl nFileLength = getFileSize(); He_(JXTP if(nFileLength == -1) !7a^8
{ x_iy;\s1 System.err.println("File Length is not known!"); "i<3}6/* } W<hdb!bE else if(nFileLength == -2) 08n%%
F { U.j\u>a System.err.println("File is not access!"); !DUg"o3G> } 3L%r_N*a else t~W4o8<w { 2WECQl=r for(int i=0;i<nStartPos.length;i++) 'UG}E@G { 7te!>gUW nStartPos = (long)(i*(nFileLength/nStartPos.length)); hz|z&vyP } 96E7hp !: for(int i=0;i<nEndPos.length-1;i++) 88=FPEU { +FKP5L} nEndPos = nStartPos[i+1]; _wJ#jJz2 } =28H^rK{ nEndPos[nEndPos.length-1] = nFileLength; A_*Lo6uII } |b@A:8ss } ]4Yb$e` IV#My9}e OZ0%;Y0 //启动子线程 +PXfr~ 4 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Ty|c@X for(int i=0;i<nStartPos.length;i++) W9m[>-Ew { E=~WQ13Q fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), dv}R]f' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ^F0jI5j ). nStartPos,nEndPos,i); Y'H/
$M N Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Q
pc^qP^- fileSplitterFetch.start();
~zC fan/ } kQ'xs%Fw // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q/`o6xv siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 0bL=l0N$W // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", >#n-4NZ;p9 nEndPos = " + nFileLength); b/}0
&VXo // fileSplitterFetch[nPos.length-1].start();
%!h+ > 5:e1a?9 :+^llz //等待子线程结束 'wq:F?viF //int count = 0; 1L
qJ@v0 //是否结束while循环 dY`J,s boolean breakWhile = false; ]@T `qR l8lR5< /j\TmcnU^ while(!bStop) y'wW2U/1- { /[dAgxL write_nPos(); |i}g7 Utility.sleep(500); <rmV$_ breakWhile = true; rGL{g&_ 0DT2qM[, MdjMTe s for(int i=0;i<nStartPos.length;i++) leJd){ { x)mC^ if(!fileSplitterFetch.bDownOver) :!FwF65 { 6x8|v7cMH breakWhile = false; \1_&?(pU break; yvwcXNXR@ } )`7h,w
J[1 } M<pgaB0 if(breakWhile) FEswNB(]* break; Oip..f0 t4f\0`jN ..mz!:Zs0 //count++; tJ=zk3BN~ //if(count>4) SVz.d/3Y // siteStop(); 7Wn]l! } $ayD55W4 a8c]B/ d_B5@9e# System.err.println("文件下载结束!"); t4uxon } `d#_66TLr catch(Exception e){e.printStackTrace ();} 1_]l|`Po } ?&_\$L[ [} 3Y1t{G ^[akB|#\9 //获得文件长度 ![jP)WgF public long getFileSize() I]1fH { /Vc!N)
int nFileLength = -1; &t4(86Bmq try{ +R$KEGu~0Y URL url = new URL(siteInfoBean.getSSiteURL()); YdaJ& HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ;Yj&7k1 httpConnection.setRequestProperty("User-Agent","NetFox"); OD|&qsbL aH~"hB^e _Z&R'`kg int responseCode=httpConnection.getResponseCode(); +__Rk1CVh if(responseCode>=400) $<PVzW,$o { dI|/Xm> processErrorCode(responseCode); wS4wED&a return -2; //-2 represent access is error x]T;W&s } LJx
g \
3N#% Fsh-a7Qp String sHeader; o}z}79Z ]W,g>91m _i#Z'4?2E for(int i=1;;i++) V>Cf
8>m { \Qn8"I83AV //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); i`;I"oY4 //Utility.log(in.readLine()); Z(P#]jI] sHeader=httpConnection.getHeaderFieldKey(i); EzaOg| if(sHeader!=null) RZjR d { N8TO"`wdbs if(sHeader.equals("Content-Length")) @@ QU"8q { IcZ 'KV nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); zD'gGxM1 break; &~8}y+z } _1~Sj* } "7DPsPs else frt?*|: break; ]F~5l?4u# } M<729M } [*(MI 9WM catch(IOException e){e.printStackTrace ();} +Muyp]_ catch(Exception e){e.printStackTrace ();} ?l/rg6mbI' @tA.^k0` =
N#WwNC Utility.log(nFileLength); ntT|G0E t65!2G"< a5iMCmL+ return nFileLength; `#V"@Go } vR,'': =% p"oj]: _:z~P<%s //保存下载信息(文件指针位置) DEBgb private void write_nPos() tv0xfAV { 1\2 m'o try{ d3\8BKp output = new DataOutputStream(new FileOutputStream(tmpFile)); #%5>}$ output.writeInt(nStartPos.length); L%DL
n for(int i=0;i<nStartPos.length;i++) =P!Vi6[gF~ { iw{n|&Y#` // output.writeLong(nPos); VYwaU^ output.writeLong(fileSplitterFetch.nStartPos); 5^xt/vYa) output.writeLong(fileSplitterFetch.nEndPos); P/_XDP./U } 3B0%:Jj output.close(); Fri5_rxLl } \S9z.!7v$ catch(IOException e){e.printStackTrace ();} GHkSU;}) catch(Exception e){e.printStackTrace ();} %/s1ma6q } }XUHP% (Cq-8**dY L=$P //读取保存的下载信息(文件指针位置) WM#!X!Vo private void read_nPos() L*_xu _F { g/E;OcFaO try{ myo/}58Nv DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); s[g1ei9 int nCount = input.readInt(); ldxUq,p nStartPos = new long[nCount];
4@5<B nEndPos = new long[nCount]; qHj4`& for(int i=0;i<nStartPos.length;i++) $qvNv[ { vD(;VeW[ nStartPos = input.readLong(); o]nQo?! nEndPos = input.readLong(); 1{wy%|H\ } #: F)A_Y input.close(); 8_uDxd } ,"/_G catch(IOException e){e.printStackTrace ();} R'F|z{8 catch(Exception e){e.printStackTrace ();} C$5v:Fk } AkF1Hj V6!oe^a7' 5!Guf?i private void processErrorCode(int nErrorCode) ^,X+
n5q;m { Y5;:jYk#<_ System.err.println("Error Code : " + nErrorCode); D Lu]d$G } v|hi;l@7E qjWgyhL ;9^B# aTM //停止文件下载 koUH>J: public void siteStop() j_{gk"2:d` { n_!&Wr^CX bStop = true; !=-l760 for(int i=0;i<nStartPos.length;i++) R38
w!6{ fileSplitterFetch.splitterStop(); 5E%W;$3Pb d<whb2l l0
1Lg6+S } tpVtbh1)u } `R^)<v* //负责部分文件的抓取 MF1u8Yl:0 **FileSplitterFetch.java 4Qw!YI#40$ */ \&cVcAg package NetFox; A[b'MNsv iX,Qh2(ig E/am^ TO` import java.io.*; <sPB|5Ak import java.net.*; 2Zl65 :s4CWEd _[<I&^% public class FileSplitterFetch extends Thread { :O{ :;X) B}3s=+L@8 WgY3g1C String sURL; //File URL _Q7)FK long nStartPos; //File Snippet Start Position u-? &~WA long nEndPos; //File Snippet End Position ^{bP#f int nThreadID; //Thread's ID ($3QjH_@ boolean bDownOver = false; //Downing is over #3qkG) boolean bStop = false; //Stop identical UgUW4x'+ FileAccessI fileAccessI = null; //File Access interface m1frN#3 ;eWVc;H Qdtfi1_Y1 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException yyXJ_B { F:\y#U6"J this.sURL = sURL; DF-og*V this.nStartPos = nStart; JY /Cd6\ this.nEndPos = nEnd; c~>M7e( nThreadID = id; b)df V= fileAccessI = new FileAccessI(sName,nStartPos);//定位 ){6;o&CC: } F<I-^BY) J${wU@_% f+)F-3 public void run() l5aQDkp} { a
ZfX | while(nStartPos < nEndPos && !bStop) pa.W-qyu { v!W,h2:J Z'u`)jR ]o_ Ps| try{ 4YdmG.CU URL url = new URL(sURL); Lrz>00(*4 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Zaq:l[% httpConnection.setRequestProperty("User-Agent","NetFox"); `B^?Za,xN String sProperty = "bytes="+nStartPos+"-"; 1W;+hXx httpConnection.setRequestProperty("RANGE",sProperty); ^*Ca+22xO Utility.log(sProperty); "--rz;+K &oAuh?kTq
~DCw
[y InputStream input = httpConnection.getInputStream(); Q~`]0R159e //logResponseHead(httpConnection); ^D\#*pIO u<):gI =m:0#&t,* byte[] b = new byte[1024]; 5<&<61[A int nRead; iS02uVmBZ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) lPx4I { B:Msn)C~ nStartPos += fileAccessI.write(b,0,nRead); R_(A&, //if(nThreadID == 1) =7Nm=5@ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); YsDn?p D@ } .\i9}ye *-gS u 1!,lI?j, Utility.log("Thread " + nThreadID + " is over!"); YMJ?t" bDownOver = true; ='YR; //nPos = fileAccessI.write (b,0,nRead); 5.idC-\ } N=-hXgX^ catch(Exception e){e.printStackTrace ();} rW!P~yk } `y
m^0x8 } /J1O{L Av7bp[OD :Bda]]Y= //打印回应的头信息 2v yB[( public void logResponseHead(HttpURLConnection con) HlLF<k~} { )7:2v1Xr] for(int i=1;;i++) +d]} {
S+_}=25 String header=con.getHeaderFieldKey(i); 6?z&G6 if(header!=null) ss
|<\DE+ //responseHeaders.put(header,httpConnection.getHeaderField(header)); fq_ 6xs Utility.log(header+" : "+con.getHeaderField(header)); &QLCij5: else %0. o(U break; c.,eIiL } NhXTt!S6C } `dMl5b }8 fG+H. ,~%Qu~\ public void splitterStop() @UE0.R< { 0}-&v+ bStop = true; 3]M
YHb } E.t9F3 >O |hN ` 3Ud&B } uXyNj2(d. i8+kc_8#d -9\O$ I-3 /* fw'$HV76 **FileAccess.java 78Nli/U *//文件访问(定位,写) ,b KA]#(2 package NetFox; dGrOw) import java.io.*; 0A/GWSmF JPS L-j WQ|d;[E public class FileAccessI implements Serializable{ g=:%j5?.e 0+m"eGwTm //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 84cmPnaT RandomAccessFile oSavedFile; `9kjYSd#E long nPos; LdDkd(k w[n|Sauy, ?,;|*A public FileAccessI() throws IOException rX{QgyY&
{ mv)M9c,` this("",0); PQlG! } A|c :&i kS[k*bN0 <~u.:x@ R public FileAccessI(String sName,long nPos) throws IOException jgVra* { Xa Yx avq oSavedFile = new RandomAccessFile(sName,"rw"); \V +$2
:A this.nPos = nPos; (IAl$IP63s oSavedFile.seek(nPos); t9zPJQlT} } t&ztY]
qh ^{zwIH2I] Fx/9T2%= public synchronized int write(byte[] b,int nStart,int nLen) Q{0-pHr} { fc+P`r int n = -1; BB1'B-O try{
ACU0 oSavedFile.write(b,nStart,nLen); 49@
pA- n = nLen; t'Nu^_# }
u> %r( catch(IOException e) EJNj.c-# { _(0!bUs> e.printStackTrace (); fFqK.^Tn } 4O[5, FwBktuS 3Nsb@0 return n; a`~$6
"v } !Z<GUblt Vj:)w<], s<sqO,! } VCX})sp _ _-rP 23U9+ /* c_kxjzA# **SiteInfoBean.java mucY+k1>g */ MztT/31S package NetFox; b!PN6<SI yV$p(+KkS u8~.6]Ae public class SiteInfoBean { dGQy=T: {>5z~OV w44{~[0d4 private String sSiteURL; //Site's URL r&o%n5B private String sFilePath; //Saved File's Path 5u~Ik c~ private String sFileName; //Saved File's Name DJr 8<u private int nSplitter; //Count of Splited Downloading File WN?!(r<qA_ oQjh?vm '"GdO;}& public SiteInfoBean() C3G?dZKv2 {//nSplitter的缺省值为5 rfXM*h //default value of nSplitter is 5 :*/<eT_ this("","","",5); 8W[QV } R)nhgp(~ P2 !~}{- ]^8:"Ky' public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) WxWgY}` { L((z;y>q| sSiteURL= sURL; BXZ( %tnY sFilePath = sPath; P]yER9' sFileName = sName; TN7kt]a2 this.nSplitter = nSpiltter; qWw@6VvoQ eq(|%]a= dK|MQ < } NO`LSF 7M3q|7? qAivsYN* public String getSSiteURL() `vL R;D { ?rk3oa- return sSiteURL; gS4K](KH | } UF D_ yc_(L-'n N]KqSpPh public void setSSiteURL(String value) X
H{5E4P { p KKn sSiteURL = value; S8.nM}x } xotq$r K 2LLuS! o'>jO.| public String getSFilePath() &y3_>!L { XL EA|# return sFilePath; qe`W~a9x } d Aym) V
[[B~Rs {D1=TTr^ public void setSFilePath(String value) r/:9j(yxr { q^(A6W sFilePath = value; I/XVo2Ee } &b"PjtU.X 9 I]*T 6CY_8/:zL public String getSFileName() zT!JHG { c6BaC@2 return sFileName; hh:0m\@< } 3zs~Y3M?i J[VQ6fD% Z|' tw^0e5 public void setSFileName(String value) wQPjo!FEX { *!C^L"i sFileName = value; EBK\.[ } /vsQ <t;~ He">kJx ]7h&ZF public int getNSplitter() TQID-I { i`Lt=)@& return nSplitter; lYQcQ*- } z Lf^O%zN 4V43(G 2MtaOG2l&q public void setNSplitter(int nCount) Nl;rg*@o { ,^AkfOY7" nSplitter = nCount; K'1rS[^>R } O?8G } iCc@N|~ ]C5JP~#z )7c^@I;7 /* ``>WFLWTn **Utility.java "z@qG]#5 */ olK%TM[Y package NetFox; mgH4)!Z*56 U{i9h6b"18 Hr96sN.R
public class Utility { J~n{gT<L 33"{"2==` If]g6
B.= public Utility() 0o`0Td { sx*(JM}Be }tc,3>/ ]J_Dn\ } ~w4aA<2Uq
gt}/C4| //线程睡眠 $n(@hT>? public static void sleep(int nSecond) {[)J~kC+ { j_p.KF'[? try{ <<4G GO Thread.sleep(nSecond); N \A)P } -pa.-@ catch(Exception e) "o=h /q5& { G8akMd]2 e.printStackTrace (); :q^g+Bu= } a/`fJY6rR } Z*s/%4On k{"~G#GwP //日志 ad
i5h public static void log(String sMsg) cs~
}k7>< { %)\Cwl System.err.println(sMsg); y(6&90cr } ~g>15b3 *~2jP;$ p*NC nD* public static void log(int sMsg) p~Dm3^Y { %aL>n=$ System.err.println(sMsg); MeP U`M-- } Ldt7?Y(V( } "Z}0 A/y 6~$< wyAqrf /*
CcAsJX~_ **TestMethod.java _Y\@{T;^Zb */ ]DC]=F. package NetFox; >Z<ym|(T* ?R"5 .3 '>'h7F=tY public class TestMethod { YVu8/D@ o t6-c{ZX>A %z8@; public TestMethod() [>Q{70 c[ { ///xx/weblogic60b2_win.exe CdTmL{Y1 try{ Ra~n:$tg2 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Z4hP //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); b39;Sv|# SiteFileFetch fileFetch = new SiteFileFetch(bean); hTVN`9h7 fileFetch.start(); uVOpg]8d } HzbO#)Id-I catch(Exception e){e.printStackTrace ();} 0SvPyf%AC \ov>?5 b'vJPv~hI } \Xxx5:qM 5:n&G[Md *p.ELI1IC public static void main(String[] args) jGt'S{ { o~es>; new TestMethod(); Av+
w>~/3 } :p8JO:g9 } )#*c|. 点击下载更多相关资料
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