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/* hOB\n! **SiteFileFetch.java ,xYsH+ybA */ DMQNr(w{!2 package NetFox; Dk`4bYK import java.io.*; 43>9)t import java.net.*; Pc(n@'m~ |[Ie.&) WY"Y)S public class SiteFileFetch extends Thread { X&(ERY,h @?Gw|bP l+2cj?X SiteInfoBean siteInfoBean = null; //文件信息Bean o8'Mks long[] nStartPos; //开始位置 V5O=iMP long[] nEndPos; //结束位置 ySQ-!fQnP FileSplitterFetch[] fileSplitterFetch; //子线程对象 I/HV;g:# long nFileLength; //文件长度 K3rBl!7v boolean bFirst = true; //是否第一次取文件 ~`2&'8 boolean bStop = false; //停止标志 u`Z0{d File tmpFile; //文件下载的临时信息 zr.+'
DataOutputStream output; //输出到文件的输出流 nuSN)}b<Q Ug7`ez4vw //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) `z}vONXpAX public SiteFileFetch(SiteInfoBean bean) throws IOException *
-KJh_ { j /H>0^ siteInfoBean = bean; c6,s+^^ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); l
Io9,Ke tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); F#1 Kk#t if(tmpFile.exists ()) 1l+kO,X] { 5L-lpT8P bFirst = false; ACigeK^C}E read_nPos(); d&|z=%9xl } 6F*-qb3 else heL$2dZ5H { /5Zp-Pq nStartPos = new long[bean.getNSplitter()]; y9C;T(oi; nEndPos = new long[bean.getNSplitter()]; 1E5a( } @S}/g/+2 )sW6iR&_i f]tv`<Q7 lt{lpH } Z5G]p4 U*3AM_w R:'Ou:Mh public void run() sI&i{D { xF(
bS+(o //获得文件长度 6<x~Mk'u) //分割文件
qH#r- //实例FileSplitterFetch ?a5h iN0 //启动FileSplitterFetch线程 H2qf' //等待子线程返回 ? YF${ try{ 3CR@'
qG- if(bFirst) ;,1=zhKU. { lPM3}52Xu nFileLength = getFileSize(); pOC% oj if(nFileLength == -1) f64(a\Rw!^ { M1oPOC\0. System.err.println("File Length is not known!"); ^WE4*.( } +|y*}bG else if(nFileLength == -2) |KL')&" { GX4QaT% System.err.println("File is not access!"); Z_H?WGO } AV40:y\RW else Q6"uK { gNShOu for(int i=0;i<nStartPos.length;i++) <9P4}`%)3 { M|\^UF2e nStartPos = (long)(i*(nFileLength/nStartPos.length)); o#qH2)tb } Y3-gUX*w0 for(int i=0;i<nEndPos.length-1;i++) 25 CZmsg { 1T ( u nEndPos = nStartPos[i+1]; Kv(z4 z } *~p(GC nEndPos[nEndPos.length-1] = nFileLength; :e*DTVv8 } 8b|OXWl } n( g)UNx T~BA)![ YT>KJ //启动子线程 )4l>XlQ& fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; '|A|vCRCG for(int i=0;i<nStartPos.length;i++) E2@`d6 { %$@1FlqX; fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), .%=V">R siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), qnB<k,8T nStartPos,nEndPos,i); -? s&pKi Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); yuOS&+,P fileSplitterFetch.start(); veeI==] } >F1G!#$0 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ~h-C&G,v siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Nln`fE/Ht // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 9lf*O0Z&n nEndPos = " + nFileLength); 6{q;1-8j+j // fileSplitterFetch[nPos.length-1].start(); vT|`%~Be (n,u|}8Y HPg3`Ul //等待子线程结束 8S\RN&T$ //int count = 0; u*3NS$vH //是否结束while循环 :.kZR; boolean breakWhile = false; 07V8;A<, ,7W:fwdR {(
#zcK while(!bStop)
bu>qsU3 { $B;_Jo\| write_nPos(); WJ|:kuF Utility.sleep(500); f`jc#f5+' breakWhile = true; nVE9^')8V MtS3p>4 v2Bzx/F: for(int i=0;i<nStartPos.length;i++) dBSbu=^$ ) { (hIF]>,kl if(!fileSplitterFetch.bDownOver) Lxv6!?v| { pY@Y?Jj breakWhile = false; *z'8j break; "w Af.=F } oH^(qZ8W } %Y]=1BRk} if(breakWhile) w~z[wm Okp break; #2RiLht /kgeV4]zR hfqqQ!,l! //count++; ~*M$O & //if(count>4) r> k-KdS // siteStop(); "g>.{E5 } )"Q*G/+2Ie KzjC/1sd c~0{s> System.err.println("文件下载结束!"); oc7$H>ET1 } CS 8jA\ catch(Exception e){e.printStackTrace ();} TX}T|ri } .f:n\eT): w]u@G-e OtJ\T/q, //获得文件长度 %<"}y$J public long getFileSize() G,f-. { >G~mp<L int nFileLength = -1; 4[yIOs try{ xe4Oxo URL url = new URL(siteInfoBean.getSSiteURL()); DZ$`
4;C[ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); W#'c5:m
4 httpConnection.setRequestProperty("User-Agent","NetFox"); VA] e 1TS0X:TCn jCioE int responseCode=httpConnection.getResponseCode(); -`b8T0?oK if(responseCode>=400) (Glr\q]jF\ { =w$tvo/ processErrorCode(responseCode); /J3ZL[o?Q return -2; //-2 represent access is error r X'*|] } JTU#vq:TY vAb^]d FOwnxYGVf String sHeader; {sVY`}p| 6Wj^*L! &Lm-()wb for(int i=1;;i++) 7y^%7U \ { #m<tJnEO //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); M;w?[yEZ //Utility.log(in.readLine()); :~F :/5 sHeader=httpConnection.getHeaderFieldKey(i); 59r_#(uo if(sHeader!=null)
K+Y^>N 4m { -d+aV1n if(sHeader.equals("Content-Length")) `F t]MR { ~]HN9R^& nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); P>i%7:OMZA break; P 1XK*GZ } m<rhIq } NGC,lv else '3 33Ctxy break; 1x)ZB~L } ;G |i^ } ^n1%OzGK# catch(IOException e){e.printStackTrace ();} A#8q2n270* catch(Exception e){e.printStackTrace ();} KLoE&ds JyL a#\ R O.G'?m<:# Utility.log(nFileLength);
O.`Jl% #[{3} %b N_eX/ux return nFileLength; VU`OO$,W } m: n`g1 fq )vK ;-P)m //保存下载信息(文件指针位置) A4C+5R private void write_nPos() dU) ]:>Uz { \Ig68dFf% try{ K5Q43e1 output = new DataOutputStream(new FileOutputStream(tmpFile)); 3`E=#ff% output.writeInt(nStartPos.length); pM;vH]| for(int i=0;i<nStartPos.length;i++) ~{hxR)x9 { gTl<wo + // output.writeLong(nPos); gr-9l0u output.writeLong(fileSplitterFetch.nStartPos); FBx_c;)9Z output.writeLong(fileSplitterFetch.nEndPos); /1N6X.Zb } uvDzKMw~R output.close(); &QRE"_g } Q;11N7+ catch(IOException e){e.printStackTrace ();} c'uhK8| catch(Exception e){e.printStackTrace ();} Hy.AyU|L } ~Q{QM: k !oPq?lW9 N`iwC! //读取保存的下载信息(文件指针位置) PZxAH9 S? private void read_nPos() <+MyZM(z> { ]i(-I <` try{ %^sTU4D5 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 1"Z@Q`} int nCount = input.readInt(); [(Xy.L7x nStartPos = new long[nCount]; 'c2W}$q nEndPos = new long[nCount]; De7Ts for(int i=0;i<nStartPos.length;i++) -9N@$+T { S/|,u`g- nStartPos = input.readLong(); :B3[:MpL} nEndPos = input.readLong(); j',W 64 } k@zy input.close(); *eI)Z=8 } [Wd-Zn% catch(IOException e){e.printStackTrace ();} ]Chj T} catch(Exception e){e.printStackTrace ();} `&\Q +W } X%z }VA +$4(zPs@ dS^T$sz.co private void processErrorCode(int nErrorCode) Vk<
LJ
S { |*Z$E$k: System.err.println("Error Code : " + nErrorCode); rpeJkG@+ } 7Q\|=$2 mc=LP>uoS DPi_O{W> //停止文件下载 5T sU Qc public void siteStop() J+rCxn?;g { V5+SWXZ bStop = true; "$s~SIUB for(int i=0;i<nStartPos.length;i++) J>fQNW!{ fileSplitterFetch.splitterStop(); mF` B# UOQEk22
+)JpUqHa } h(WrL } dJ$"l|$$ //负责部分文件的抓取 fXrXV~'8 **FileSplitterFetch.java d%l{V6 */ ^u3V
E package NetFox; /mo(_ s4&^D< h -iJlm import java.io.*; rG,5[/l import java.net.*; LYlDc;<A UK9@oCIB \fr-<5w7 9 public class FileSplitterFetch extends Thread { ^C2\`jLMY U,nEbKJgk KWLbD# String sURL; //File URL f~ }H long nStartPos; //File Snippet Start Position ySI~{YVM long nEndPos; //File Snippet End Position VfT*7_ int nThreadID; //Thread's ID ~-wPP{! boolean bDownOver = false; //Downing is over j xYc2 boolean bStop = false; //Stop identical (O0Urm FileAccessI fileAccessI = null; //File Access interface R|i/lEq H'Yh2a`!o i2~ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException V5}B:SUB { s-dLZ.9F this.sURL = sURL; B"%{i-v>** this.nStartPos = nStart; @?h/B=56 this.nEndPos = nEnd; 6 uKTGc4 nThreadID = id; Jx'i2&hGN fileAccessI = new FileAccessI(sName,nStartPos);//定位 M'_9A } Tw + q^6 +!&" B]tIi^ public void run() T#bu
V { ZvcJK4hi while(nStartPos < nEndPos && !bStop) g-Pwp[!qkf { b!M"VDjQ Nj("|`9" >E*$
E try{ ,o]4?- URL url = new URL(sURL); ?yh}/T\qp HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); *L!!]Q2c httpConnection.setRequestProperty("User-Agent","NetFox"); M DF%\Sx String sProperty = "bytes="+nStartPos+"-"; g2unV[()_ httpConnection.setRequestProperty("RANGE",sProperty); =J1rlnaaEL Utility.log(sProperty); #-h\. #s c'*a{CV4P T?4G'84nN InputStream input = httpConnection.getInputStream(); 8i?l02 //logResponseHead(httpConnection);
&y<ZE jsNF#yE> Wh&8pH: byte[] b = new byte[1024]; L/"0ws_ int nRead; LzYO$Ir:g while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop)
>0l"P"] { !t i6 nStartPos += fileAccessI.write(b,0,nRead); (%`QhH //if(nThreadID == 1) k__$Q9qj( // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); /T.KbLx~q } NV#FvM/#" r-h#{==*c >MPr=W%E Utility.log("Thread " + nThreadID + " is over!"); g[w,!F bDownOver = true; Z}-Vf$O~ //nPos = fileAccessI.write (b,0,nRead); JMTvSXr } n8.kE)? catch(Exception e){e.printStackTrace ();} ['ksP-= } KoS*0U<g6 } [d* ~@P _v*
nlc %TsPyiYl //打印回应的头信息 _D|^.)=U| public void logResponseHead(HttpURLConnection con) `c'W-O/ { hTwA% for(int i=1;;i++) 'g9"Qv?0{` { [V}S<Xp String header=con.getHeaderFieldKey(i); ]D,MiDph if(header!=null) 5aa<qtUjH //responseHeaders.put(header,httpConnection.getHeaderField(header)); j^`hzh3S Utility.log(header+" : "+con.getHeaderField(header)); (!:cen~|[ else )Z %T27r,^ break; J/3_C6UZ } 'TAUE{{ } S/ibb& Rar"B*b;$ 7==f\%, public void splitterStop() N~F
RM& x { Zk[&IBE_ bStop = true; JH8zF{? } pFJB'=c ]%!u7z|\6 kCXdGhb } Y F*OU"2U I<A6Z&*un tlA"B{7 /* gR@C0 **FileAccess.java 'ky b\q *//文件访问(定位,写) QFIL)'K package NetFox; h;j IYxj import java.io.*; (#;`"Yu %E_b'[8 3
zn W= public class FileAccessI implements Serializable{ E#F/88( )Jv[xY~ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 kkK
kf' RandomAccessFile oSavedFile; t>H`X~SR? long nPos; -@ZiS^l m RZ:ie ]f1{n public FileAccessI() throws IOException V=1Bo~ { hxS 6:5Uc this("",0); R-P-i0~ } K+6e?5t qL94SW; kQ public FileAccessI(String sName,long nPos) throws IOException Ldn8 { CXCpqcC oSavedFile = new RandomAccessFile(sName,"rw"); 5MSB dO this.nPos = nPos; ce6__f5? oSavedFile.seek(nPos); C R|lt } ,$eK-w <`0h|m'U mZUfn%QXb( public synchronized int write(byte[] b,int nStart,int nLen) 3 LdQ]S { X*L;.@xA int n = -1; &
=/ try{ C
XHy.&Vt oSavedFile.write(b,nStart,nLen); 8?FbtBAn n = nLen; HQ{JwW!m } ^S6u<, catch(IOException e) PpsIhMq@ { @ps1Dr4s e.printStackTrace (); 1 tR_8lC } UswZG^Wh Zec <m8~ 6b!F 1 return n; OnWx#84 } ~g7l8H67 >*wtbkU (@#M!' } LjU'z# Oq3A#6~ 0dh=fcb /* 8 B**8yg. **SiteInfoBean.java ?i`l[+G */ L_w+y package NetFox; 7+hK~ c=AOkX3UD LbtX0^ public class SiteInfoBean { HD N9.5S !@'%G6:. -)~SM& private String sSiteURL; //Site's URL -[qq(E private String sFilePath; //Saved File's Path K6olYG> private String sFileName; //Saved File's Name wd/<
8>2X private int nSplitter; //Count of Splited Downloading File f>ZyI{ SIKOFs {3!E4"p public SiteInfoBean() "YB**Y {//nSplitter的缺省值为5 ?3O9eZY@ //default value of nSplitter is 5 eznypY= this("","","",5); 2<hpK!R } h!m_PgRSs X=C1/4wU &[&r2>a public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) SwU\
q]^|Z { uf&N[M sSiteURL= sURL; ^_ojR4 sFilePath = sPath; HV/c c" sFileName = sName; dik9 >*"|o this.nSplitter = nSpiltter; `
\A(9u* TO-$B8*nq srV.)Ur } .IJ_jt-^d <x\7L2#p ^'jEnN( public String getSSiteURL() eh[_~>w { we#wH- return sSiteURL; a" H WGY } Skz|*n|eY 76vy5R(. ~y$ !48o public void setSSiteURL(String value) !`mZ0c+ { F]mgmYD% sSiteURL = value; #oJ5k8Wy } ;}z\i r&Ca"dI ]qB:PtX public String getSFilePath() *GUAO){' { Yhp]x return sFilePath; bZx!0>h } H_?o-L?+ CU7F5@+ ^2wLxXO6 public void setSFilePath(String value) VxzkQ}o { YJ:3!B>Zo sFilePath = value; +ki{H}G21 } ,&4qgp{) i55x`>]&sb [&*6_q"V public String getSFileName() 2m>-dqg { '$ef+@y return sFileName; qOaQxRYm%Y } @/&b;s73 ESoAzo,u %{;Qls%[t public void setSFileName(String value) 7E!7"2e
a { kbPE "urR sFileName = value; 3DaQo0N } =_]2&(? ,^8 MB. NU(AEfF public int getNSplitter() BGr.yEy { "g+z !4b# return nSplitter; @u._"/K } *1@:'rJ >5G>D~b C!C|\$)- public void setNSplitter(int nCount) ",>H(wJ8 {
Yav2q3 nSplitter = nCount; dO7;}>F$n } ?r_l8 } K)Zlc0e #'4OYY. =:+0)t=ao /* 9%sM*[A **Utility.java DF {OnF */ 0Aa`p3.) package NetFox; Npn=cLC& H.G!A6bd KLC{7"6e) public class Utility { TzBzEiANn @d"wAZzD? AOrHU M[I public Utility() 7<9L?F2 { I?Q+9Rmm`J
fa.0I~ F>gmj'-^ } V^Rkt%JY tZ2e!<C //线程睡眠 D@X+{ public static void sleep(int nSecond) F~U!1) { hnWo|! ,O$ try{ KjB/.4lLq Thread.sleep(nSecond); uIMe } _{~]/k catch(Exception e) G%u9+XV1# { nT#JOmv e.printStackTrace (); x|eeRf| } s~26 } +CM7C%U
Lv1{k\aw //日志 d77r9 public static void log(String sMsg) -v?hqWMp# { 7t-Lz|
$" System.err.println(sMsg); }%{MPqg } NN
0Q`r,8} .I$}KE) ^;F{)bmu+) public static void log(int sMsg) ;HOPABWz) { G[idN3+# System.err.println(sMsg); .]Mn^2#j } 7.bN99{xPM } OY"6J@[z ZkB3[$4C=5 /,|CrNwY* /* (sw-~U% **TestMethod.java 8n4V
cu */ cjULX+h package NetFox; L(&}Wv *Zd84wRSj #l1Q e` public class TestMethod { (foBp u@%|kc` e,A)U5X public TestMethod() U l Mi.;/^ { ///xx/weblogic60b2_win.exe /48 =UK try{ +?`b=6e(` SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); bdh(WJh% //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 6-,m}Ce\ SiteFileFetch fileFetch = new SiteFileFetch(bean); PI5j"u UO fileFetch.start(); @{Py % } TF+
l5fv catch(Exception e){e.printStackTrace ();} |kiJ}oy '4;6u]d)2 -pTI? } )"O{D`uX 6&2LWaWMo$ ;)!"Ty| public static void main(String[] args) G5]1s { C>|@& o1 new TestMethod(); {,O`rW_eS } aw}+'(?8] } \Rk$t7ZH 点击下载更多相关资料
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