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/* HP|,AmVLl **SiteFileFetch.java p9R`hgx */ ]n?a h package NetFox; wJ! import java.io.*; S$W
*i@x? import java.net.*; RL~|Kr<7J #W
1`vke3 OH5
kT$ public class SiteFileFetch extends Thread {
j^KM deaxb8'7 ~B>I?j SiteInfoBean siteInfoBean = null; //文件信息Bean .6!]RA5!= long[] nStartPos; //开始位置 J&^r}6D long[] nEndPos; //结束位置 :eS7"EG{3 FileSplitterFetch[] fileSplitterFetch; //子线程对象 FePJ8 long nFileLength; //文件长度 O8SX#,3^} boolean bFirst = true; //是否第一次取文件 8>j+xbw boolean bStop = false; //停止标志 ]w%7/N0R File tmpFile; //文件下载的临时信息 c}Jy'F7&f DataOutputStream output; //输出到文件的输出流 Gcg`Knr N\H{p%8 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) \ ^EjE public SiteFileFetch(SiteInfoBean bean) throws IOException 0LoA-c<Ay { M7yJ2u <Ty siteInfoBean = bean; meR%);\ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); v|_?qBs" tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); l,h#RTfry if(tmpFile.exists ()) 2t1 WbP1 { v0X5`VV bFirst = false; IaE};8a8 read_nPos(); OW)8Z60 } +<:p`% else gb@Rx { \yb^%$hZ0
nStartPos = new long[bean.getNSplitter()]; +x
G] (? nEndPos = new long[bean.getNSplitter()]; GY,@jp|R } 0VoC|,$U F"hi2@/TI [KWF7GQi
)%;#~\A } `]5XY8^kI {xEX_$nv wX#\\Jgi public void run() 9foQ0#R { g%j z,| //获得文件长度 4}580mBc //分割文件 f:7Y //实例FileSplitterFetch ;}f%b E //启动FileSplitterFetch线程 -2> L*"^ //等待子线程返回 cWFvYF try{ (4ow0}1 if(bFirst) %Tsefs?_ { FD|R4 V*3 nFileLength = getFileSize(); 'P@a_*I if(nFileLength == -1) n$`Nx\ v { 'ZT!a]4 System.err.println("File Length is not known!"); d q:M!F } .%-> else if(nFileLength == -2) NXeo&+F { V$q%=Sip System.err.println("File is not access!"); U{>!`RN } >ID 3oi else 5`x9+XvoN { A
,LAA$ for(int i=0;i<nStartPos.length;i++) C+5^[V { 2"<}9A<Xs nStartPos = (long)(i*(nFileLength/nStartPos.length)); uO[4 WZ } W\} VZY for(int i=0;i<nEndPos.length-1;i++) xR#hU;E} { aE,x>I 7 D nEndPos = nStartPos[i+1]; /f%u_ 8pV% } P]y2W#Rs nEndPos[nEndPos.length-1] = nFileLength; 9D<^)ShY } s\7|b:y& } F,:F9r?l,H v{% /aw '2# 0UdG //启动子线程 a$aI% fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; SI;G|uO;/ for(int i=0;i<nStartPos.length;i++) ~PlwPvWo { 5I&^n0h|& fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Iu1P}R>C siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 9s*Lzi[} nStartPos,nEndPos,i); E\V>3rse Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ni%^w(J3Q fileSplitterFetch.start(); X/7: * } cK-!Evv // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 1>1|>% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); {'!D2y.7g // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Do_L nEndPos = " + nFileLength); ^f`#8G7 ( // fileSplitterFetch[nPos.length-1].start(); VwC,+B jC\R8_ x,7axx6 //等待子线程结束 i"e)LJz //int count = 0; =<e# 2 //是否结束while循环 ZgXh[UHQy boolean breakWhile = false; H}U&=w' %mcuYR'D} G^2"\4R]p while(!bStop) xE6y9"}!h { s?`)[K'- write_nPos(); /`s^.Xh Utility.sleep(500); P$pl breakWhile = true; P?0b-Qr$a Ak_;GvC! U;jk+i for(int i=0;i<nStartPos.length;i++) Sl$dXB@ { pp{); if(!fileSplitterFetch.bDownOver) U-lN_? { "lz!'~im breakWhile = false; yTDoS|B+) break; "(C}Dn# } e<C5}#wt } n[iil$VKh if(breakWhile) 5 ;|9bWH break; oOUVU}H rg'? ?rq 5#d(_ //count++; Me`"@{r|# //if(count>4) *|=&MU*+ // siteStop(); r?[mn^Bo 5 } tICxAp: 6u.b?_u d3{Zhn@ System.err.println("文件下载结束!"); R]V`t^1 } jr9ZRHCU catch(Exception e){e.printStackTrace ();} 72{kig9c } NK4ven7/ M"_XaVl 2i>xJMW //获得文件长度 aIfog+Lp public long getFileSize() 3oKqj> { lo(Ht=d int nFileLength = -1; Fza)dJ7 try{ ,\qo URL url = new URL(siteInfoBean.getSSiteURL()); Maxnk3n HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); l+N?:E$5=% httpConnection.setRequestProperty("User-Agent","NetFox"); =}q4ked/ f0[xMn0Tu h:GOcLYM@X int responseCode=httpConnection.getResponseCode(); 3]
@<. if(responseCode>=400)
RB\WttI { 7}lZa~/ processErrorCode(responseCode); NMj`wQ`M+ return -2; //-2 represent access is error HOUyB's' } q?MYX=Y6 4kz8U Y^!40XjrD String sHeader; 9iOlR=-* \u /5&[; 5Px.G* for(int i=1;;i++) MkYem6 { z44uhR h //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 21WqLgT3 4 //Utility.log(in.readLine());
(dT!u8O e sHeader=httpConnection.getHeaderFieldKey(i); nAX|=qp# if(sHeader!=null)
pIrAGA; { Zk/NO^1b if(sHeader.equals("Content-Length")) &6:,2W&s { H\b5]q% nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); }3*h`(Bv7 break; .*f;v4! } >3kR~:; } J`8>QMK^5 else s<dD>SU break; @t2 Q5c } P0Jd6"sS" } $x)'_o}e catch(IOException e){e.printStackTrace ();} $e;!nI;z catch(Exception e){e.printStackTrace ();} *.+>ur?t QP;b\11m mvL'l) Utility.log(nFileLength); feopO
j6~+ Ab"uN 8qc%{8 return nFileLength; (o:CxhV } ^GAdl} oy`m:Xp -'N#@Wdr //保存下载信息(文件指针位置) Nb8<8O
^ private void write_nPos() E*I]v { dSL %% try{ S]o output = new DataOutputStream(new FileOutputStream(tmpFile)); #wd \& output.writeInt(nStartPos.length); .;F+ QP0 for(int i=0;i<nStartPos.length;i++) N4v)0 { 2(rZ@Wl // output.writeLong(nPos); ]q3Kd{B output.writeLong(fileSplitterFetch.nStartPos); 7E5Dz7 output.writeLong(fileSplitterFetch.nEndPos); T7T!v } [!q&r(-K output.close(); qB39\j } `%XgGHiE catch(IOException e){e.printStackTrace ();} ^kD?0Fm catch(Exception e){e.printStackTrace ();} ^VIUXa } VoyH: M"vcF5q pkU e|V //读取保存的下载信息(文件指针位置) u7C{> private void read_nPos() 2%qn!+. { Wu4Nq+ try{ rO`g~>- DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); .apX72's, int nCount = input.readInt(); )f!dG(\ nStartPos = new long[nCount]; '=~y'nPG7 nEndPos = new long[nCount]; Z+dR(9otH3 for(int i=0;i<nStartPos.length;i++) KVcZ@0[S { CU;nrd " nStartPos = input.readLong(); PJYA5"}W nEndPos = input.readLong(); OT&E)eR } M$W#Q\<*#r input.close(); w.Vynb } t(Zs*c( catch(IOException e){e.printStackTrace ();} Wi5|9 catch(Exception e){e.printStackTrace ();} JAb?u.,Ns_ } PM.SEzhm )c '>E4> {e%abr_B private void processErrorCode(int nErrorCode) Riw7<j { Q kZM(pG System.err.println("Error Code : " + nErrorCode); eE{L>u } 7
h1"8#X NslA/"* m3(T0.j0P //停止文件下载 :ky<`Jfr` public void siteStop() 9$,gTU_a { Tb={g;0@ bStop = true; M96( Rg for(int i=0;i<nStartPos.length;i++) 9i<-\w^$ fileSplitterFetch.splitterStop(); _o?(t\B9{ h*KHEg"+ a-E-hX2 } z;C=d(|nN } .lBY"W&{ //负责部分文件的抓取 |3,V%>z **FileSplitterFetch.java |3s&Y`x-D */ iW}l[g8sw! package NetFox; J=X%
xb xNm32~ _0*>I1F~ import java.io.*; hcgc
=$^ import java.net.*; p},Fwbl yOK])&c SO<m(o)G2 public class FileSplitterFetch extends Thread { e^NEj1 unnx#e] V*zz-
2_i String sURL; //File URL klJ[ {p long nStartPos; //File Snippet Start Position F!&pENQ long nEndPos; //File Snippet End Position ~{vdP=/WP int nThreadID; //Thread's ID MgQU6O< boolean bDownOver = false; //Downing is over "-n%874IT boolean bStop = false; //Stop identical ~J-|,ZMd FileAccessI fileAccessI = null; //File Access interface 5;
PXF b_jZL'en eqZ+no public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException &U~r}= { !Gp3/<"Wy$ this.sURL = sURL; _`_IUuj$E this.nStartPos = nStart; jN%p5nZ^EK this.nEndPos = nEnd; 7vaN&%;E% nThreadID = id; NceB'YG| fileAccessI = new FileAccessI(sName,nStartPos);//定位 p$nK@t} } fHd!/%iG s!'A\nVV1$ [u9JL3 public void run() %Sn 6*\z { :pDY while(nStartPos < nEndPos && !bStop) =/g$bZ { Ydh<T F4! 9V;$v cvUut^CdK try{ A3$aMCwKd URL url = new URL(sURL); %Lp7@ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); _ML~c&9jv httpConnection.setRequestProperty("User-Agent","NetFox"); V<vPFxC String sProperty = "bytes="+nStartPos+"-"; >yBxa) httpConnection.setRequestProperty("RANGE",sProperty); +&7Kk9^ Utility.log(sProperty); ,=Nw(GI F[CT l3X o? i.v0@!K InputStream input = httpConnection.getInputStream(); v]T(zL| //logResponseHead(httpConnection); nF<y7XkO lW$&fuDHF Z|(c(H2 byte[] b = new byte[1024]; )J+{oB[>b int nRead; %A62xnX while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 5eOj,[? { BY*2yp}7 nStartPos += fileAccessI.write(b,0,nRead); tP`G]BCbt //if(nThreadID == 1) QM ZUt // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); V[Rrst0yo } +lW}ixt u\XkXS` 8pPC 9ew\= Utility.log("Thread " + nThreadID + " is over!"); Hs%QEvZl bDownOver = true; < m enABN4 //nPos = fileAccessI.write (b,0,nRead); x_<bK$OU } n#>.\F catch(Exception e){e.printStackTrace ();} vK6ibl0 } qB F!b0lr } >7nV$.5S 5e)6ua , 2{e dW+ //打印回应的头信息 7-d}pgVK public void logResponseHead(HttpURLConnection con) {OO*iZ.O { ov`^o25f for(int i=1;;i++) ?+n&hHRg { qByNHo7Tb String header=con.getHeaderFieldKey(i); 5@czK*5 if(header!=null) )@]6=*% //responseHeaders.put(header,httpConnection.getHeaderField(header)); ])V2}gH Utility.log(header+" : "+con.getHeaderField(header)); $_RWd#Q( else GsIwY {d break; DB`$Ru@ } tL~,ZCQz } E- )VPZ1D ]3t1=+ ]$~Fzs public void splitterStop() _ktK+8*6` { zb;(?!Bd# bStop = true; Q(|PZng } o)%-l4S 2W3NL|P ~=:2~$gsn } Qj(vBo?D K`QOU-M@} RpO@pd m /* DS:>/m>) **FileAccess.java uu}`warW *//文件访问(定位,写) JF~1'"_f: package NetFox; &yxNvyA[u import java.io.*; AH2_#\ 'tb(J3ZP o84UFhm public class FileAccessI implements Serializable{ %G;0T;0L _wf5%(~b //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 j G- RandomAccessFile oSavedFile; BBHK long nPos; sm 's-gD G2.|fp_}pG pheE^jUr public FileAccessI() throws IOException GE1i+.+-. { /g_9m this("",0); %#~((m1 } n*4lz^LR oZTgN .q &v^!y=Bt public FileAccessI(String sName,long nPos) throws IOException bIgh@= 2 { P$Z} oSavedFile = new RandomAccessFile(sName,"rw"); z]kwRWe`j this.nPos = nPos; Y3-gUX*w0 oSavedFile.seek(nPos); lVPOYl% } iI5+P`sE&J s\[LpLt KZ=u54 public synchronized int write(byte[] b,int nStart,int nLen) &V'519vmoZ { t3PtKgP-6 int n = -1; 7vn%kW=$ try{ ~C&*.ZR oSavedFile.write(b,nStart,nLen); 9O;cJ)tXY n = nLen; qG<7hr@x] } t\h$&[[l'z catch(IOException e) pSHSgd~& {
#j;Tb2&w e.printStackTrace (); |%
z^N* } X1+wX`f J/2j;,8D :Sr?6FPc return n; ~+yZfOcw } _V@WNo%B (Uk>?XAr xc9YM0B& } @@I7$* s~*}0-lS 9 Ycn0 /* xJ{_qP **SiteInfoBean.java vY6oVjM */ v??TJ^1 package NetFox; ,LDm8 # 05jC6 lVz9k public class SiteInfoBean { vw2`:]Q+ qve
./ H`~;|6}]n private String sSiteURL; //Site's URL x2co>.i private String sFilePath; //Saved File's Path 7BR8/4gcPu private String sFileName; //Saved File's Name cHx%Nd\ private int nSplitter; //Count of Splited Downloading File JK]R*!{n h.)h@$d &(EHq public SiteInfoBean() j[I`\" {//nSplitter的缺省值为5 b_TS<, //default value of nSplitter is 5 98RKCc9h this("","","",5); ~@T<gA9V } IOL L1ar Q_]d5pl 7p.>\YtoR} public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ]1D%zKY%$Z { }pVTTs` sSiteURL= sURL; F/p,j0S sFilePath = sPath; y%S1ZTScO sFileName = sName; .%}?b~
this.nSplitter = nSpiltter; s,6`RI% y}FZD?" )KE[!ofD } |?d#eQ9a #sTEQjJ,J ]PWDE" public String getSSiteURL() {ox2Tg? { M*sR3SZ
return sSiteURL; mMSh2B } \ \06T` :w`3cwQ l.`u5D public void setSSiteURL(String value) .~>?*} { 7ER|'j sSiteURL = value; K<4Kk3 } ~
Vw9 +-<}+8G; >5hhd38 public String getSFilePath() (@r
`$5D.b { iCj2"T4TN return sFilePath; MP^ d}FL } AH#4wPxF :XG;ru%i 3*ixlO:qGk public void setSFilePath(String value) [kV;[c} { fpWg R4__ sFilePath = value; oR .cSGh } b| M3` J-xS:Ha'l yF13Of^l./ public String getSFileName() :O-iykXyI { WOLuw% return sFileName; :i~W
}r } eS+g| $cW &<y2q/U} fX~'Zk\u public void setSFileName(String value) aAE>)#f( { :#5xA?=*
S sFileName = value; oVvc?P } 2S"Nf8>zp D&G"BZx| 2)X4y"l public int getNSplitter() vI1i,x#i { Ea6
&~" return nSplitter; tZyo`[La } 0'5/K , %" D%: gF?[rqz{ public void setNSplitter(int nCount) N8toxRu { KLoE&ds nSplitter = nCount; JyL a#\ R } O.G'?m<:# }
O.`Jl% #[{3} %b =U8Ek;Drp /* );V2?G`/ **Utility.java S! Rc|6y% */ uhyj5u) package NetFox; VhL{'w7f A4C+5R ({r*=wAP public class Utility { #LlUxHv # 3_Cp%~Gi-_ !Ucjax~ public Utility() fhPkEvJ { mw$r$C{ Wj|alH9< r3E!dTDWq } FBx_c;)9Z /1N6X.Zb //线程睡眠 uvDzKMw~R public static void sleep(int nSecond) &QRE"_g { Q;11N7+ try{ +gd4\ZG Thread.sleep(nSecond); r={c,i } ho8`sh>N catch(Exception e) l^GP3S { k.<]4iS e.printStackTrace ();
$`ZzvZ'r } 32DbNEk } zgx&Pte L`f^y;Y. //日志 K<?nq0- public static void log(String sMsg) o#) {1<0vg { }En System.err.println(sMsg); !+>v[(OzM } T|J9cgtS L86n}+
P\ E )Gw0]G public static void log(int sMsg) O[tvR:Nh { Q!-
0xlx System.err.println(sMsg); P-F)%T[ } W} WI; cI } A.<H>=Z#O H]Hv;fcC We0.3aG /* r/pH_@ **TestMethod.java Grs]d-xI */ mxor1P#| package NetFox; x{D yTtX< QaUm1i# ?
WJ> p public class TestMethod { ^`un'5Vk 8!.ojdyn 5T sU Qc public TestMethod() V5+SWXZ { ///xx/weblogic60b2_win.exe HhO".GA try{ oFOnjK"|F SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 5F`;yh+e //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); KiG p[eb SiteFileFetch fileFetch = new SiteFileFetch(bean); c/c$D;T fileFetch.start(); }Zl&]e } 21k5I #U catch(Exception e){e.printStackTrace ();} r0p w_j YK|bXSA[ *JggU } 8DP+W$ %$%&m1Y zD?oXs public static void main(String[] args) +`3!I { V_plq6z new TestMethod(); P[s8JDqu } +P.+_7+: } ^C2\`jLMY 点击下载更多相关资料
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