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/* 3u7^*$S **SiteFileFetch.java iWu$$IV?- */ 7p&%0'BO1z package NetFox; u>j:8lhtV import java.io.*; sm-RpZ&| import java.net.*; *5iNw_& `Td 0R! 95;q] =U public class SiteFileFetch extends Thread { ajuwP1I n83,MV?- N^A&DrMF SiteInfoBean siteInfoBean = null; //文件信息Bean -A>1L@N long[] nStartPos; //开始位置 eN@V?G26K long[] nEndPos; //结束位置 +Sk ; FileSplitterFetch[] fileSplitterFetch; //子线程对象 89:Y s= long nFileLength; //文件长度 DG&14c>g boolean bFirst = true; //是否第一次取文件 "gXz{$q boolean bStop = false; //停止标志 XCO{}wU)> File tmpFile; //文件下载的临时信息 lL~T@+J~ DataOutputStream output; //输出到文件的输出流 F.mS,W] bNR}Mk]? //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 2~+_T public SiteFileFetch(SiteInfoBean bean) throws IOException $[iSZ ; { U@dztX@u siteInfoBean = bean; }!b9L] //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); -crKBy tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Ob2H7! if(tmpFile.exists ()) Pp1HOJYJp0 { T<06y3sN bFirst = false; F MB\$(g read_nPos(); TOV531
} g5/%}8[-
2 else `6`NuZ*6g { vRYQ4B4o nStartPos = new long[bean.getNSplitter()]; DYJ@>8 nEndPos = new long[bean.getNSplitter()]; Y[9x\6
_E } 7Xm7{`jH W'6~`t Fku9hB 0f/=C9L } @yPa9Ug(V _, /m Z3Os9X9p public void run() JX(J Z/8B^ { .|$6Pi%! //获得文件长度 o0^'xVv //分割文件 AxLnF(eG //实例FileSplitterFetch ]kx)/n-K //启动FileSplitterFetch线程 EAp6IhW{ //等待子线程返回 *;. l/ try{ Gd1%6}<~ if(bFirst) g
nJe!E { !1K<iz_8 nFileLength = getFileSize(); VYI%U'9Q if(nFileLength == -1) h"cLZM:6 { X*VHi System.err.println("File Length is not known!"); {X<mr~ } pUki!TA else if(nFileLength == -2) ww82)m8 { )vO;=%GQ System.err.println("File is not access!"); #z 3tSnmp } y^_'g2H else I^sWf3'db { j7=I!<w V for(int i=0;i<nStartPos.length;i++) 2
|w;4 { +,<\LIP nStartPos = (long)(i*(nFileLength/nStartPos.length)); AYHB?xOpR } $Z(fPKRN/ for(int i=0;i<nEndPos.length-1;i++) 6rP[*0[ { SHS:>V nEndPos = nStartPos[i+1]; =(b;Cow } ^l;nBD#nJ nEndPos[nEndPos.length-1] = nFileLength; w-\U;&8 } YJ_`[LnL } t_ 5b =A&x
d" FLdO //启动子线程 68?oV)fE fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; h"/FqO for(int i=0;i<nStartPos.length;i++) 0o2o]{rM{2 { i|+ EC_^< fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), g=.~_&O siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), (lF;c<69 nStartPos,nEndPos,i); x;"! Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *F/ uAI^) fileSplitterFetch.start(); -]c5**O} } Z#YkAQHv5 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), `"QUA G siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); QxCZ<| // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", /l_$1<c nEndPos = " + nFileLength); ""l_&3oz // fileSplitterFetch[nPos.length-1].start(); d
(]t} i>6SY83B} ?P4@U9i //等待子线程结束 <SI&e/ //int count = 0; 6#VG,'e3 //是否结束while循环 x'*,~u boolean breakWhile = false; <cG .V|B 9frP`4<) 33x3zEUt6 while(!bStop) %
INRds { K1#Y{k5D} write_nPos(); yZ3/Ia>, Utility.sleep(500); =$601r breakWhile = true; iK{q_f\" Ry*NRP; CBdSgHA3> for(int i=0;i<nStartPos.length;i++) ^c{}G<U^ {
3U=q3{%1 if(!fileSplitterFetch.bDownOver) ,?i^i#Wqzg { dgPJte%i breakWhile = false; e'aKI]>a break; "6rZn_H/| } 8[5%l7's } ,}F2l|x_ if(breakWhile) *FDz20S break; !J!zi i.2O~30ST h-h U=I8 //count++; hKjvD.6]% //if(count>4) pHFlO!#]| // siteStop(); ,
RfU1R } -H~g+i*J ~J!a?] H4 Y7p System.err.println("文件下载结束!"); g6EdCG.V } 0$l=ME( catch(Exception e){e.printStackTrace ();} Malt7M } nMc3.fM 9oS \{[x. bT-(lIU //获得文件长度 f|Kd{ $VO public long getFileSize() R[
S*ON { (FZL> int nFileLength = -1; ,$5; try{ #G{}Rd|! URL url = new URL(siteInfoBean.getSSiteURL()); =]oBBokV HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); uoFH{.) httpConnection.setRequestProperty("User-Agent","NetFox"); l)D18 FOpOS?Cr' h*)spwF- int responseCode=httpConnection.getResponseCode(); T3Kq1
Rh if(responseCode>=400) ,HS\(Z { Q6Q>b4 .3 processErrorCode(responseCode); "[@-p return -2; //-2 represent access is error Cca(
oV } $=iz&{9 <oV
_EZ m}6GVQ'Q String sHeader; ~ $#DB@b :BCjt@K} N-jFA8n for(int i=1;;i++) !Qrlb>1z- { }txHuq1Q. //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); .r SeJZzuj //Utility.log(in.readLine()); ;3Fgy8T sHeader=httpConnection.getHeaderFieldKey(i); h+zJ"\ if(sHeader!=null) J5k\R+\H { 5ejdf if(sHeader.equals("Content-Length")) *gHOH!K,S { )=9\6zXS nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); X55Eemg/ break; 2|tZ xlt- } /4RKA!W } =Xm
[ else LYGFEjS[ break; TuwH?{
FzK } w |>:mQnU } 1 dz&J\|E# catch(IOException e){e.printStackTrace ();} t ?28s/? catch(Exception e){e.printStackTrace ();}
}CaL:kY8 O-wR48Q )<DL' Utility.log(nFileLength); =Z2U 6 )0$UW #g4X`AHB return nFileLength; xex/L%!Rj } 6;dB J\_tigd "FcA:7 + //保存下载信息(文件指针位置) #1z}~1- private void write_nPos() "6
dC { |=l;UqB try{ A[XEbfDO output = new DataOutputStream(new FileOutputStream(tmpFile)); Il'+^u_ < output.writeInt(nStartPos.length); |g> K$m^ for(int i=0;i<nStartPos.length;i++) `iv,aQ ' { ],>Z'W // output.writeLong(nPos); )eY3[>` output.writeLong(fileSplitterFetch.nStartPos); Eo)Q> AM output.writeLong(fileSplitterFetch.nEndPos); J.?6a:#bU/ } b,D+1' output.close(); SR%h=`t } /V46:`V catch(IOException e){e.printStackTrace ();} s4;SA catch(Exception e){e.printStackTrace ();} rxIfatp^ } H~J#!3 h<6@&yzp oVb6,Pn //读取保存的下载信息(文件指针位置) ]^VC@$\)+ private void read_nPos() Jmf&&)p { 6~&4>2b0f try{ +aEE(u6%E@ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); pUYa1 = int nCount = input.readInt(); q,^^c1f nStartPos = new long[nCount]; &0K
H00l nEndPos = new long[nCount]; o9<jj> R; for(int i=0;i<nStartPos.length;i++) H;G*tje/M { j*q]-$ 2E nStartPos = input.readLong(); ;?yd;GOt) nEndPos = input.readLong(); OY51~#BF } lk%rE
input.close(); qdL;Ii<Y0 } . AWRe1? catch(IOException e){e.printStackTrace ();} B<H5WI catch(Exception e){e.printStackTrace ();} U" aFi } x>!#8?-h (JL{X`gs# xx#;)]WT private void processErrorCode(int nErrorCode) +g/y)] AP { PE]jYyyHtU System.err.println("Error Code : " + nErrorCode); Jf|J":S } 0{@E=}}h ^$6EO)< <lB^>Hfu //停止文件下载 H--(zxK public void siteStop() c9= ;:E { ]p `#KVW bStop = true; W.HM!HQp for(int i=0;i<nStartPos.length;i++) U9y[b82 fileSplitterFetch.splitterStop(); mPi4.p) >(|T]u](q J3oH^ } aHXd1\6m } p4fU/ //负责部分文件的抓取 (VI4kRj **FileSplitterFetch.java {3i.U028] */ 0AZ Vc package NetFox; Pn[-{nz @v2_gjRe y['$^T?oP import java.io.*; {uM*.] import java.net.*; <KoiZ{V -L NJ*?b Ev,>_1#Xm public class FileSplitterFetch extends Thread { ^r?ZrbSbz lSPQXu*[ 2>Xgo% String sURL; //File URL ]t=m long nStartPos; //File Snippet Start Position
D8m1:kU long nEndPos; //File Snippet End Position 9G[!"eZ} int nThreadID; //Thread's ID $>hPB[ [ boolean bDownOver = false; //Downing is over 7.,C'^ci boolean bStop = false; //Stop identical _s[ohMlh FileAccessI fileAccessI = null; //File Access interface FMc$?mm CCNrjaA 2`9e20 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException bX Q*d_]WT { Q(
U+o- this.sURL = sURL; |C301ENZ this.nStartPos = nStart; bJ4} )P& this.nEndPos = nEnd; _D1Uc| nThreadID = id; ?NOc]'<(G fileAccessI = new FileAccessI(sName,nStartPos);//定位 M4w,J2_8MK } tg_xk+x ?1T)cd* 2F%2K?$`Ej public void run() 0ft 81RK { 84j6.\, while(nStartPos < nEndPos && !bStop) vMu6u .e { O`j1~o<{ Sg -+?ZJ^A try{ uH="l.u URL url = new URL(sURL); L1ro\ H HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); NOM6},rp httpConnection.setRequestProperty("User-Agent","NetFox"); w%~UuJ#i String sProperty = "bytes="+nStartPos+"-"; )l g>'O httpConnection.setRequestProperty("RANGE",sProperty); UCV1 { Utility.log(sProperty); I!1|);li kn<IWW_t
PgIH( InputStream input = httpConnection.getInputStream(); ywQ[>itMa //logResponseHead(httpConnection); o1lhVM`15 W5cBT?V RT`.S
uN byte[] b = new byte[1024]; 1i3;P/ int nRead; VJbsM1y M while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) #djby}hi { qJ(XW N H nStartPos += fileAccessI.write(b,0,nRead); u+EZ"p;o //if(nThreadID == 1) =d`w~iC // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )hG4,0hv& } Hq$&rNnq\ wtM1gYl^ 8]h~jNku Utility.log("Thread " + nThreadID + " is over!"); O]_a$U*6 bDownOver = true; "`Q&s //nPos = fileAccessI.write (b,0,nRead); W_.WMbT } 4j|IG/m catch(Exception e){e.printStackTrace ();} E<RPMd @a } Ua hsX } ;n,xu0/ (vP<} gcF:/@:Rm //打印回应的头信息 z@I'Ryalyc public void logResponseHead(HttpURLConnection con) sGFvSW { Zzn
N"Si, for(int i=1;;i++) :A7\eN5 { =xw+cs1,x String header=con.getHeaderFieldKey(i); y>^FKN/ if(header!=null) w)N~u% //responseHeaders.put(header,httpConnection.getHeaderField(header)); ;
DXsPpZC Utility.log(header+" : "+con.getHeaderField(header)); -wa"&Q else R_W6} break; ~+ kfb^<- } <@Z`<T6 } JR_%v=n~x Upa F>,kM sZx`u+ public void splitterStop() ZyM7)!+kPa { /q,vQ[R/ bStop = true; '8Cg2v5&w } xv"v=' dBw7l} /:tzSKq} } Al1_\vx7 x(n|zp (" w_h{6Kc< /* %oB0@&!mS **FileAccess.java /!?b&N/d) *//文件访问(定位,写) \o*w#e[M package NetFox; +E^2]F7Zk import java.io.*; JC0# pU; R_D&"& )T6:@n^]h public class FileAccessI implements Serializable{ fMIRr5 6f2?)jOW^N //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 15@2h RandomAccessFile oSavedFile; `dw">z, long nPos; |a#=o}R_ {#st>%i mPU}]1*p public FileAccessI() throws IOException AR!v%Z49i { | }L=e. this("",0); uH?dy55Y } No"i6R+ tm/=Oc1p ny{S&f public FileAccessI(String sName,long nPos) throws IOException j,Mbl"P { ^KdT,^6T oSavedFile = new RandomAccessFile(sName,"rw"); F!3p )? this.nPos = nPos; #K0/ >W oSavedFile.seek(nPos); tA^+RO4 } 9Nps<+K ;O1jf4y wK0x\V6dJ public synchronized int write(byte[] b,int nStart,int nLen) Td,d9M { s>:gL,%c int n = -1; *v%gNq try{ -.r"|\1X oSavedFile.write(b,nStart,nLen); X&HYWH'@, n = nLen; T_!F I29 } (u^8=# catch(IOException e) Cu5_OJ { k;jl3GV e.printStackTrace (); *Lxt{z`9 } 2<9K}Of w,X)g{^T XlD=<$Nk7 return n; p6NPWaBR
} !@])Ut@tN yZ 7)|j 2*^=)5Gj-h } qE3Ud:j @54$IhhT~ >]anTF`d /* }cI-]|)|2 **SiteInfoBean.java X3 1%T" */ EcX7wrl9x package NetFox; jygUf| %TR J Q|P
M6ta public class SiteInfoBean { W!T[
^+ b:'8_jL lz6CK
private String sSiteURL; //Site's URL (SQGl!Lai0 private String sFilePath; //Saved File's Path IJKdVb~ private String sFileName; //Saved File's Name eaNfCXHDN private int nSplitter; //Count of Splited Downloading File @{{L1[~:0 $[b}r#P Yr~wsE/ public SiteInfoBean() ?$ov9U_ {//nSplitter的缺省值为5 8RuW[T? //default value of nSplitter is 5 Tc!n@!RA| this("","","",5); 6W } 88<d<)7t ?/1LueC: ]mi\Y"RO public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 7Y-Q, ?1 { w0@XJH:P sSiteURL= sURL; w2V:x[ sFilePath = sPath; cUP1Uolvn sFileName = sName; \!jz1`]&{ this.nSplitter = nSpiltter; -hfkF+=U' nh0gT>a>@ ^i8biOSZu } *2N0r2t& BMQ4i&kF| Nxl#] public String getSSiteURL() @:B}QxC { qhG2j; return sSiteURL; ooB9iNo^ } _g9j_
x:= ]8OmYU%6V <KtL,a=2+ public void setSSiteURL(String value) Het>G{ { E_$nsM8? sSiteURL = value; c;]^aaQ+> } b;*'j9ly zsd<0^
p\{
/*e<r6 public String getSFilePath() -R1;(n) { *kZH~] return sFilePath; /E{tNd^S } 4Ozcs'} %jf|efxo ^*UtF9~%n public void setSFilePath(String value) [~cz|C# { Z
eY*5m sFilePath = value; }#M>CNi'PU } ;.xKVH/@ vA ZkT" !a\HdQ public String getSFileName() UUbO\_&y { ps8tr:T^= return sFileName; y=+OC1k\8 } ^.g-}r8, Unq~lt%2 I`jG public void setSFileName(String value) iqB%sIP { -vc$I=b; sFileName = value; k EAF1RP: } wL]#]DiE ob9od5Rf @x
A^F%( public int getNSplitter() MT)q?NcG { ./.aLTh return nSplitter; 5! +{JTXa } .!lLj1?p kD1Nq~h2 c3c3T`B public void setNSplitter(int nCount) ^5?|Dj { -`z%<)!Y nSplitter = nCount; agruS'c g } r4X\/ } gcO$ T` aMkuyqPf{ ?|}qT05 /* kSCpr0c **Utility.java vpdPW %B */ :f_oN3F p package NetFox; luac 2~ETu&R: 9jx>&MnWs public class Utility { 3fZoF`<a pEN`6* BXxJra/V public Utility() q@VIFmqY! { +!nf?5; !Z{7X ^ Buq(L6P9r } -'WR9M?fq OR'e!{ //线程睡眠 usoyH0t!? public static void sleep(int nSecond) "A~D(1K { $3ZQ|X[|+ try{ 1~2+w]-kU Thread.sleep(nSecond); 2S[:mnK } t@+e#3P! catch(Exception e) .A6pPRy e { H0t#J e.printStackTrace (); 6L
Fhhl^ } `jhbKgR[ } u$ o19n 9o P //日志 FLkZZ\ public static void log(String sMsg) cf"!U+x { 4W E)2vkS System.err.println(sMsg); G@T_o4t } m@L>6;* *g:Dg I 2 b{x/V 9&| public static void log(int sMsg) .>_%12> { L7xiq{t`Y System.err.println(sMsg); K9nW"0> } ^)| tf\4 } Su
+<mW mT|r:Yr: el<[Ng[ /* Klu0m~X@ **TestMethod.java j9/iBK\Y */ q8GCO\( package NetFox; ggfCfn 7[R`52pP fti0Tz' public class TestMethod { {`>pigo >,)U46 (58r9WhS public TestMethod() 889^P`Q5 { ///xx/weblogic60b2_win.exe jsKKg^g try{ K,P`V
&m? SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); AnZy
oa //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); u,`V%J?vW SiteFileFetch fileFetch = new SiteFileFetch(bean); 4Y
G\<Zf fileFetch.start(); QMDkkNK } U`)d
`4" catch(Exception e){e.printStackTrace ();} =dWqB& Gsm.a 9"M-nH*< } /7.//klN 2@N-#x' Q
} 0_}W public static void main(String[] args) R"z}q(O: { :#N]s new TestMethod(); 1@~ 1vsJ } jPc,+? } }`76yH^c 点击下载更多相关资料
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