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/* #,OiZQJC **SiteFileFetch.java }{.V^; */ 5Z13s package NetFox; r(g2&}o\ import java.io.*; GQ*or>R1 import java.net.*; bs)Ro/7} ^%qQ)>I=j O)`ye5>v public class SiteFileFetch extends Thread { \4uj!LgTb P,k=u$ ngzQVaB9 SiteInfoBean siteInfoBean = null; //文件信息Bean dDl_Pyg4K long[] nStartPos; //开始位置 @`HW0Y_: long[] nEndPos; //结束位置 aQV? } FileSplitterFetch[] fileSplitterFetch; //子线程对象 KD'}9{F, long nFileLength; //文件长度 j{HIdP boolean bFirst = true; //是否第一次取文件 ;kD
Rm'( boolean bStop = false; //停止标志 0I*{CVTQj File tmpFile; //文件下载的临时信息 Nb\B*=4AR DataOutputStream output; //输出到文件的输出流 2 y&k f5'vjWJ30 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) :* J! public SiteFileFetch(SiteInfoBean bean) throws IOException K\5/ ||gi { ge%tj O siteInfoBean = bean; m21H68y //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 4cDe'9
LA tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); b>nwX9Y/U if(tmpFile.exists ()) T|uG1 { _"82W^W i bFirst = false; Nk?/vMaw read_nPos(); ]F"@+_E } K%;=i2: else AdRK )L { ephvvj~zW4 nStartPos = new long[bean.getNSplitter()]; &Vg)/t; nEndPos = new long[bean.getNSplitter()]; [2z
>8SL } 8aW<lu D*ZswHT{y 3u9}z+q y.::d9v } `=2p6<#z _:!7M^IU ;;Jx1Q public void run() Pe`jNiI { {G{>Qa| //获得文件长度 |zOwC9-6 //分割文件 v+'*.Iv: //实例FileSplitterFetch {%6g6?=j //启动FileSplitterFetch线程 _Pn
1n //等待子线程返回 (Z Q?1Qxo try{ RHmT$^= if(bFirst) c=p!2jJ1K~ { Kae-Y nFileLength = getFileSize(); \
F)}brPc if(nFileLength == -1) c+:^0&l { LmP pt3[ System.err.println("File Length is not known!"); <BK?@Xy }
g hW else if(nFileLength == -2) p-,Bq!aG$ { *Z3b6X'e System.err.println("File is not access!"); /$|-!e<5b\ } LB^xdMXi else MZ>Q Rf { jH37{S- for(int i=0;i<nStartPos.length;i++) Y9B"yV { 5)ooE nStartPos = (long)(i*(nFileLength/nStartPos.length)); a&B@F]+ } +(h{3Y| for(int i=0;i<nEndPos.length-1;i++) $rPQ%2eF4 { . $
HE nEndPos = nStartPos[i+1]; wM!dz& } 2j$~lI nEndPos[nEndPos.length-1] = nFileLength; Kr+#)S } .L.9e#?3 } ?B<.d8i Myh?=:1~(c Raf-I+ //启动子线程 -f"{%<Q fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; X5+$:jq& for(int i=0;i<nStartPos.length;i++) ix5<h } { Twk<< fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Ka$lNL3<j siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), s$ ?;C nStartPos,nEndPos,i); [ZS.6{vr Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); mcxD#+H 3 fileSplitterFetch.start(); )QI#szv6 } 7nZ3u_~ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), imyfki $B siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); _Zxo<}w}y // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", >".@; nEndPos = " + nFileLength); .>Fpk7 // fileSplitterFetch[nPos.length-1].start(); 877Kv); 'Qg.D88 &5QvUn //等待子线程结束 dEam| //int count = 0; %I@vM s^ //是否结束while循环 P|TM4i] boolean breakWhile = false; nY,LQ0r |Gr@Mi5 aTs9lr: while(!bStop) )*aAkM { BqtN= write_nPos(); p:3w8#)MZ Utility.sleep(500); $ SZIJe"K breakWhile = true; <Ik5S1<h$H #It!D5A lLI%J>b@ for(int i=0;i<nStartPos.length;i++) 6sT(t8[ { Y[W]YPs if(!fileSplitterFetch.bDownOver) JX`>N(K4\ { BJ{?S{"6%G breakWhile = false; oslj< break; QRwO v } im
F,8 ' } 6rlvSdB if(breakWhile) ]hZk#rp} break; bb$1zSA E CPSE{ ,Qj\_vr@ //count++; 8#HQ05q> //if(count>4) 0f9U:)1z // siteStop(); <}F(G-kV6 } )M8@|~~ zo@,>'m gBZNO! a,d System.err.println("文件下载结束!"); ;Hb"SB } f4vdJ5pV catch(Exception e){e.printStackTrace ();} \\35}
9 } XnRm9% ^MVOaV65 o5G]|JM_ //获得文件长度 *p|->p6,u public long getFileSize() SKGnx { !e('T@^u6u int nFileLength = -1; ,I:[-|Q try{ boZ/*+t URL url = new URL(siteInfoBean.getSSiteURL()); ;HiaX<O! HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); -?Cu-' httpConnection.setRequestProperty("User-Agent","NetFox"); P@Vs\wAT C#RueDa. Pd~z%VoO int responseCode=httpConnection.getResponseCode(); IG~Zxn1o if(responseCode>=400) ]PbwG { v+CW([zAx# processErrorCode(responseCode);
PmT<S,}L return -2; //-2 represent access is error o%K1!' } pE$*[IvQ' y8]vl;88yY CS0q#? String sHeader; 5'_:>0} ML%JTx0+Z 0UQ
DB5u for(int i=1;;i++) m`jGBSlw_ { ,QLy}=N //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); tR_DN //Utility.log(in.readLine()); o_ r{cnu sHeader=httpConnection.getHeaderFieldKey(i); !ED,'d%J if(sHeader!=null) 5xa!L@)`wF { Uh^j;s\y if(sHeader.equals("Content-Length")) WL3J>S_ { Y>K8^GS nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); B0^:nYko break; w<Iq:3
} y tTppmJF } ~xc0Ky?8 else ~!_UDD break; 'Y/8gD~. } .[Ny(X/]/} } Gz7,g
Y catch(IOException e){e.printStackTrace ();} &+/$~@OK catch(Exception e){e.printStackTrace ();} {<i(aq? ""jl RI BB* Utility.log(nFileLength); !X=93% t`1~5#?Du( " pL5j return nFileLength; u3HaWf3 } Apkb!"}> 0- u,AD pWKI^S //保存下载信息(文件指针位置) #?~G\Ux0/ private void write_nPos() ,Uy~O(Ft { sO)!}#,
try{ zhU^~4F output = new DataOutputStream(new FileOutputStream(tmpFile)); g5
y*-t output.writeInt(nStartPos.length); o^u}(wZ{ for(int i=0;i<nStartPos.length;i++) =E&1e;_xlE { e(9K.3@{ // output.writeLong(nPos); mHNqzdaa output.writeLong(fileSplitterFetch.nStartPos); ~~#/jULbV output.writeLong(fileSplitterFetch.nEndPos); C 6d#+ } ZV[-$ output.close(); &CfzhIi*! } XL(2Qk catch(IOException e){e.printStackTrace ();} &cf_?4 catch(Exception e){e.printStackTrace ();} F^Mt}`O } h\8bo= <p[RhP M*F`s&vM //读取保存的下载信息(文件指针位置) ' &Nv|v\V private void read_nPos() N
Q}5' { +sXnC\ try{ 07Oagq( DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 5gwEr170 int nCount = input.readInt(); ) 3I|6iS nStartPos = new long[nCount]; %i&\X[ nEndPos = new long[nCount]; P}-S[[b73s for(int i=0;i<nStartPos.length;i++) :Y)G- :S+ { T"E%;'(cp) nStartPos = input.readLong(); 3.%jet1 nEndPos = input.readLong(); PH!rWR } C0L(ti; input.close(); yI's=Iu` } &9xcP.3 catch(IOException e){e.printStackTrace ();} [8[`V)b catch(Exception e){e.printStackTrace ();} fjS# } ))J#t{X/8v a1ai?}, [V;Q#r&+ private void processErrorCode(int nErrorCode) "-G&]YMl { , D`\
RV System.err.println("Error Code : " + nErrorCode); r7v1q } Ft8ii|- b>|d Q dj3E20Ws //停止文件下载 a<Ps6' public void siteStop() B|rf[EI> { 9RY}m7 bStop = true; `_M&zN for(int i=0;i<nStartPos.length;i++) kk
aS&r> fileSplitterFetch.splitterStop(); l I+KT_|L Y IVN;:B. _u;34H&/ } !r+SE } <:~'s]`zf //负责部分文件的抓取 qox@_ **FileSplitterFetch.java C6:;
T% */ #:nds, package NetFox; w5mSoKb ( z.\,M R<ZyP~ import java.io.*; HuajdC~ import java.net.*; 1!2,K ot mQ:5(]v T?8N$J public class FileSplitterFetch extends Thread { pg4jPuCM wU5= ' QBTjiaYGa' String sURL; //File URL Fpntd IU long nStartPos; //File Snippet Start Position X6o
iOs long nEndPos; //File Snippet End Position :4S~}}N int nThreadID; //Thread's ID 5~xv"S(E} boolean bDownOver = false; //Downing is over 4+au6ABy boolean bStop = false; //Stop identical /Y*6mQ: FileAccessI fileAccessI = null; //File Access interface U\;mM\2rE }I#,o!)Vd M"z3F!-j public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException NSQf@o { Su[f"2oR this.sURL = sURL; Y_M3-H=0 this.nStartPos = nStart; qF4pTQf this.nEndPos = nEnd; 4:qM'z nThreadID = id; zvh&o*\2<d fileAccessI = new FileAccessI(sName,nStartPos);//定位 $lAhKpdlW } (\$=+' hy F0+@FS0 bOdyrynh public void run() ,F0bkNBG { /PtmJ2[ while(nStartPos < nEndPos && !bStop) <,(Ww { yyuf 8,&QY%8pX #W=H)6 try{ qvN 5[rb URL url = new URL(sURL); F$H^W@<w HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); OEj%cB! httpConnection.setRequestProperty("User-Agent","NetFox"); 7a'@NgiGg String sProperty = "bytes="+nStartPos+"-"; m*H6\on: httpConnection.setRequestProperty("RANGE",sProperty); aZYs?b>Gm Utility.log(sProperty); mX
QVL.P\ 5\P3JoH:Yg ~er4w+" InputStream input = httpConnection.getInputStream(); OwG:+T_ //logResponseHead(httpConnection); (Qz|
N 8nHFNOv6 .5?Md byte[] b = new byte[1024]; >tVD[wVF0 int nRead; -nC!kpo while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) -$5nqaK? { 3']=w@~ O[ nStartPos += fileAccessI.write(b,0,nRead); Lw #vHNf6 //if(nThreadID == 1) aG/L'weR // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); aT%6d@g } 4Nz]LK%@ \J3n[6; K@+(6\6I Utility.log("Thread " + nThreadID + " is over!"); rJ_fg$.< bDownOver = true; '5m`[S-IU //nPos = fileAccessI.write (b,0,nRead); 'Lv>!s 7 } "r.eN_d catch(Exception e){e.printStackTrace ();} ao.v]6a } nXcOFU } d"JI4)%
P*sb@y>}O )K^5+oC17 //打印回应的头信息 \l9S5%L9 public void logResponseHead(HttpURLConnection con) CGN:=D< { b0"R |d[i for(int i=1;;i++) +b6kU{ { '9#h^. String header=con.getHeaderFieldKey(i); 5$p7y: if(header!=null) ]NgEN //responseHeaders.put(header,httpConnection.getHeaderField(header)); Hze~oAP+ Utility.log(header+" : "+con.getHeaderField(header)); ]R s else Ww $?X LF break; f8?c[%br } \3v}:E+3 } 2zN%Z!a#J ?.b.mkJ l:rT{l=8* public void splitterStop() a#:K"Mf. { ^zVBS7`J bStop = true; .|9o`mF7 } !]z6?kUK S`?cs^? gw);b)&mx } _f5n
t:- 8]-c4zK -?&s6XA%# /* 5 NdIbC **FileAccess.java iH""dtO *//文件访问(定位,写) BSib/)p package NetFox; 0"to]= import java.io.*; nI6[y)j *ioVLt,:R qCaM]Y public class FileAccessI implements Serializable{ D,Jyb0BW -YHyJs-bU //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 lGAKHCs RandomAccessFile oSavedFile; />\6_kT long nPos; K<Qy1y~[ X0QLT:J b %;{Ro)03 public FileAccessI() throws IOException A#P]|i { 17{$D,P this("",0); 4(FEfde= } G`"
9/FI7 96$qH{]Ap #+,O public FileAccessI(String sName,long nPos) throws IOException 4BgrG[l) { /}=Bi- oSavedFile = new RandomAccessFile(sName,"rw"); 0ynvn9@t this.nPos = nPos; ,S7g=(27( oSavedFile.seek(nPos); KDzTe9 } p:n.:GZ=y EsR$H2" '6&a8&: public synchronized int write(byte[] b,int nStart,int nLen) 9s}y*Vp { B Ctm05 int n = -1; 8S_v} NUm try{ L&2 Zn{#` oSavedFile.write(b,nStart,nLen); z1u1%FwOfM n = nLen; {a `#O9 }
,m-/R catch(IOException e) 8QYM/yAM { wpLC, e.printStackTrace (); )m7 Y o } U1wsCH3+n *3>$f.QU Z-D4~?Tv return n; _;1H2o2f } C_JDQByfL JM-rz#;1 (?7=$z!h } gZD,#D.hR dUg| {l GcL:plz /* xJ(4RaP **SiteInfoBean.java ;^K4kK&f */
Mmu>&C\ package NetFox; 7u9!:}Tu Y79{v nlGk f4TNy^- public class SiteInfoBean { b\l +S2 `Ko6;s# rcWr0q private String sSiteURL; //Site's URL Jm l4EW7 private String sFilePath; //Saved File's Path (\=iKE4# private String sFileName; //Saved File's Name OYsG# private int nSplitter; //Count of Splited Downloading File v)a$;P% },G>+ s8h qd7 86~ public SiteInfoBean() $Jt+>.44 {//nSplitter的缺省值为5 [N-t6Z* //default value of nSplitter is 5 X-&U-S; this("","","",5); *mgK^9< } |rDv!m 0Q1sJDa. </OZ,3J= public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) i!!1^DMrw { N d"4*l; sSiteURL= sURL; cF7efs8u sFilePath = sPath; ;P{HePs=) sFileName = sName; _26~<gU8 this.nSplitter = nSpiltter; ,%FBELqOW ?u`TX_OsB I C6}s } ;
iK9'u &!lGx7zf D6KYkN(,v public String getSSiteURL() Gg3cY{7 { ~HH#aXh* return sSiteURL; n2JwZ? } uD2v6x236 Ris5)*7 g`}+K U public void setSSiteURL(String value) $1h , <$5H { Y!8Ik(/~i sSiteURL = value; -2dk8]KB] } <3;Sq~^ ) DzbJ} ,c%>M^d public String getSFilePath() 7n1@m_7O { )K4A-9pC return sFilePath; j(`L)/|O } h7( R/R f p)$DpNL% p #sOkD public void setSFilePath(String value) ItZqLUJm { Fnnk}I} sFilePath = value; 1%?J l~M } pD+_ K a/Cd;T2 .7ZV:m public String getSFileName() k|^e=I
{ m{/?6h 1 return sFileName; b|cUKsL5 } ng-g\&- z]NzLz9VfL `|1#Vuk public void setSFileName(String value) J~6-}z { >&|C
E2' sFileName = value; _7AR2 } BnLM ;5
> ?(&)p~o /5ngPHy& public int getNSplitter() 36<PI'l#~ { C>d_a;pX return nSplitter; z8SrZ#mg } /mb?C/ CI ;$Eg4uX @w)Vt$+b] public void setNSplitter(int nCount) 1CkBfK { 0i[,`>-Av nSplitter = nCount; /e^q>>z } XNwZSW } .kl _F7 ]*8K4n G .Y8z3O /* cax]lO **Utility.java Ylc[ghx */ )F\tU package NetFox; bp06xHMu ohFUy}y TNA?fm public class Utility { ~bp^Q|
wM jpl"KN?X H1]An'qz, public Utility() q;dg,Om { wt;7+ *CHLs^)
nQ*9|v4 } E,]G Ek 9'tElpDJ6# //线程睡眠 o1j_5c
PS public static void sleep(int nSecond) CzF#feTA { Tl.dr try{ _H:mBk,, Thread.sleep(nSecond); zj ;'0Zu } Y <'T;@ catch(Exception e) 6!|-,t>< { 2]Nc@wX`p e.printStackTrace (); SjT8eH # } :27GqY,3sK } 5",@!1ju 8Bvc#+B //日志 iWbrX1
I+ public static void log(String sMsg) [NE:$@ { _S4 3_hW System.err.println(sMsg); _b+=q:$/ } j Y>BU& sx ;7 WD=#. $z$ public static void log(int sMsg) aKkG[qN { >4gGb) System.err.println(sMsg); Y)kO" } :G/T{87H } ,&Iw5E[ l.ri]e |[ymNG /* *_
2db **TestMethod.java D<=:9 */ S&y (A0M package NetFox;
iw!kV ~_SoP H"_ZqEg public class TestMethod { :zXkQQD8` v(+9& 1l$c*STK public TestMethod() g5gq{KlU { ///xx/weblogic60b2_win.exe iXp*G52 try{ yQA6w% SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); |/u&%w?W
//SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5);
czM Thm SiteFileFetch fileFetch = new SiteFileFetch(bean); ou;E@`h;x fileFetch.start(); n>d@}hyv } 1wX0x.4d catch(Exception e){e.printStackTrace ();} "*E#4e[ o`hVI*D iElE-g@Ws } #7!P3j ?lg
w)A@ public static void main(String[] args) fiuF!<#;6 { $q_e~+SXT new TestMethod(); /%w9F } '+6H= Qn } oxN~(H)/ # 点击下载更多相关资料
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