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/* L Z#SX5N **SiteFileFetch.java eB*0}) */ -]~vEfq+T package NetFox; NXDuO_# import java.io.*; +/~;y{G..z import java.net.*; %FO#j 6 9TbRrS09 qUtlh,4) public class SiteFileFetch extends Thread { jAb R[QR1% p!3!&{ <2{-ey] SiteInfoBean siteInfoBean = null; //文件信息Bean %Y// } long[] nStartPos; //开始位置 ,O/ t6' long[] nEndPos; //结束位置 `Kq4z62V FileSplitterFetch[] fileSplitterFetch; //子线程对象 -}9a% long nFileLength; //文件长度 =5m~rJ<{ boolean bFirst = true; //是否第一次取文件 +&h<:/ V boolean bStop = false; //停止标志 6#/v:;bF File tmpFile; //文件下载的临时信息
h"DxgG DataOutputStream output; //输出到文件的输出流 _B5vh(. gG6j>%y //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) a"&Gs/QKSC public SiteFileFetch(SiteInfoBean bean) throws IOException fC$(l@O? {
+Q+>{HK siteInfoBean = bean; [b6P
}DW //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); VwrHD$ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); TY6Q;BTU if(tmpFile.exists ()) Dq G m { ^J-\s_)" bFirst = false; z->[:)c read_nPos(); _)?59 } OkaNVTB else )tW0iFY { qmx4hs8sh nStartPos = new long[bean.getNSplitter()]; gkw/Rd1oG nEndPos = new long[bean.getNSplitter()]; #XPY\n^k } .P^&sl*J oi:!YVc 7I`8r2H KJ;;825? } :7[20n}w $)6%LG_@ 3"HW{= public void run() U+FI^Xrt# { waI:w, //获得文件长度 }5qpiS"V9 //分割文件 nWz7$O //实例FileSplitterFetch @nOj6b //启动FileSplitterFetch线程 z IT)Hs5 //等待子线程返回 M\rZr3 try{ L.tW]43K if(bFirst) X&14;lu%p { 8.m9 =+)8 nFileLength = getFileSize(); Yfd0Np~ if(nFileLength == -1) |%l&H/ { v%$c_'d System.err.println("File Length is not known!"); bc}BQ|Q } yJn<S@)VT: else if(nFileLength == -2) \\UOpl { x>TIQU=\ System.err.println("File is not access!"); D@
4sq^|2 } EYXHxo else 0hr4}FL8 { /fDXO;tN for(int i=0;i<nStartPos.length;i++) SWWeN#Q { xh`4s nStartPos = (long)(i*(nFileLength/nStartPos.length)); Mj5&vs~n; } eOU v#F for(int i=0;i<nEndPos.length-1;i++) )N'rYS'9 { d;FOmo4 nEndPos = nStartPos[i+1]; %("WoBPH` } p%ZOLoc)Y nEndPos[nEndPos.length-1] = nFileLength; iwx*mC{|A } e` {F7rd: } Nm4
h G A+#'R
]b'"l //启动子线程 f)#rBAkt fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; P5Is#7udN8 for(int i=0;i<nStartPos.length;i++) |$+
xVi8 { n>k 1D fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 4RyQ^vL siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), %D6HY^]ayw nStartPos,nEndPos,i); WinwPn+9 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); bBg=X}9 fileSplitterFetch.start();
-?vII~a9y } 1.IEs:(; // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), V<ExR@|}.% siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); _Y _v& // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ~.&PQE$DF nEndPos = " + nFileLength); GMOnp$@H^s // fileSplitterFetch[nPos.length-1].start(); #,B+&SK{ `PS^o# &MJcLM] //等待子线程结束 uRCZGg&V?# //int count = 0; khe.+Qfgj //是否结束while循环 JrNqS[c/ boolean breakWhile = false; 6BH
P#B2j CXd/M~:! p,K!'\ while(!bStop) :F`"CR^, {
`BzjDI:a write_nPos(); :878q TB Utility.sleep(500); K'U8ft*_ breakWhile = true; Ju"K" fVo7wp J. $U_k for(int i=0;i<nStartPos.length;i++) cH6<'W{* { =O??W8u if(!fileSplitterFetch.bDownOver) -=4{X
R3 { "1z#6vw5a breakWhile = false; lN~u='Kc break; h[>Puoz } s6(bTO. } &`I 7aP| if(breakWhile) wu~ ?P ` break; Btyp=wfN[ -jk-ve d7P'c!@+ //count++; ycj\5+g //if(count>4) \\Te\l|L // siteStop(); WwF2Ry^a } $0&<Jx Nq"J[l*+g iyTKy+3A System.err.println("文件下载结束!"); cceh`s=cU } JmF:8Q3H catch(Exception e){e.printStackTrace ();} C Xh>'K } ~nRbb;M "5@\"L SQ-CdpT< //获得文件长度 X}ft7;Jpy public long getFileSize() 8;$zD]{D1 { l?O%yf`s int nFileLength = -1; MuF{STE>-> try{
;(
[^+_/ URL url = new URL(siteInfoBean.getSSiteURL()); zbAyYMtEk
HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); mGh8/Xt httpConnection.setRequestProperty("User-Agent","NetFox"); !SdP<{[ 1otE:bi ,'%*z int responseCode=httpConnection.getResponseCode(); f0 "_ {\ if(responseCode>=400) #ba7r
]Xu { go?}M]c%7 processErrorCode(responseCode); Vc!'=&* return -2; //-2 represent access is error b8&z~'ieR } >D_!d@Z @*=eqO k-I U}|Xz String sHeader; '}9 %12\^h WZN0`Od 09J,!NN for(int i=1;;i++) p%-;hL! { G]T&{3g-. //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); oT i$@q //Utility.log(in.readLine()); B8>3GZi sHeader=httpConnection.getHeaderFieldKey(i); %mRnJgV5k if(sHeader!=null) 4^7*R { #{5h6IC if(sHeader.equals("Content-Length")) wRu\9H} { #:8V<rc^ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); l4AXjq2 break; AQD`cG } 4F,RlKHBl } bA07zI2 else H8h,JBg5<F break; eA-$TSWh } LfMN 'Cb } j`QXl catch(IOException e){e.printStackTrace ();} { {+:Vy catch(Exception e){e.printStackTrace ();} TNlS2b1 &H/3@A3 wDKA1i%G Utility.log(nFileLength); E&0]s Q&vU|y Z9zsvg return nFileLength; O
+Xu?W] } C,$7fW{? & sgzSX y<m}dW6[\ //保存下载信息(文件指针位置) t:%u4\nZ; private void write_nPos() OQ+kOE& { (t"e#b(: try{ ZmS
]4WM< output = new DataOutputStream(new FileOutputStream(tmpFile)); m0 ]Lc{ output.writeInt(nStartPos.length); 8xx2+ for(int i=0;i<nStartPos.length;i++) $u,
~183 { T1uOp5_]B // output.writeLong(nPos); i([|@Y= output.writeLong(fileSplitterFetch.nStartPos); =~'y' K] output.writeLong(fileSplitterFetch.nEndPos); 95*=&d } ,@aF# output.close(); ><{Lh@{ } oT9qd@uQ0: catch(IOException e){e.printStackTrace ();} P]H4!}M catch(Exception e){e.printStackTrace ();} a.up&g_$
} \iAs |fPR7- 07>Iq8<mu //读取保存的下载信息(文件指针位置) -NUA private void read_nPos() j5m]zh5\J= { e84O
6K6o try{ {
P @mAw DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); W"H(HA int nCount = input.readInt(); 4B@Ir)^(* nStartPos = new long[nCount]; 4]no#lVRJ nEndPos = new long[nCount]; 3u4P
[ for(int i=0;i<nStartPos.length;i++) ~X,ZZ 9H { A5,(P$@k nStartPos = input.readLong(); tw&biLM5T nEndPos = input.readLong(); 3e1^r_YI } K*N8Vpz( input.close(); '19kP. } oI x!?,1 catch(IOException e){e.printStackTrace ();} Xd'B0kQaT catch(Exception e){e.printStackTrace ();} !$#8Z".{v{ } VTn6@z_ x &W
N
R{ YT<(2u#Ng private void processErrorCode(int nErrorCode) @O
HsM?nW { kI,O9z7A7 System.err.println("Error Code : " + nErrorCode); a4eE/1 } Z"E2ZSa0 BHDd^bd <'vtnz //停止文件下载 S=3 H.D!f public void siteStop() <Gz* 2i { }PzHtA,V bStop = true; I GB) for(int i=0;i<nStartPos.length;i++) -{Fy@$! fileSplitterFetch.splitterStop(); (w?W=guHu +kT
o$_Wkz [[KIuW~ot } 2Y%E.){ } .p-T > //负责部分文件的抓取 j\2q2_f **FileSplitterFetch.java ig4mj47wJ */ ^Kn:T`vB package NetFox; ;D}E/'=
7?2<W-n PRN%4G import java.io.*; K(Ak+&[ import java.net.*; TTz_w-68 KHoDD=O $%"~.L4 public class FileSplitterFetch extends Thread { =5#sB* MzIn~[\ 7z3YzQ=Kg String sURL; //File URL 'Jl73#3 long nStartPos; //File Snippet Start Position +EM^ long nEndPos; //File Snippet End Position B{ cb'\C int nThreadID; //Thread's ID xU'% 6/G boolean bDownOver = false; //Downing is over W4:#=.m boolean bStop = false; //Stop identical ^qV6khg FileAccessI fileAccessI = null; //File Access interface ^zR*s |1Q I|)U>bV B q7Qbj public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException SHN'$f0Mb { W.TdhJW9 this.sURL = sURL; I5w>*F this.nStartPos = nStart; Cm#[$T@C this.nEndPos = nEnd; w~WW2w nThreadID = id; LRv[,]b fileAccessI = new FileAccessI(sName,nStartPos);//定位 rY]QTS">o } <xr\1VjA ,\D*=5 xRm~a-rp public void run() $
1v'CT { xoN?[ while(nStartPos < nEndPos && !bStop) 9v(k<('_ { 6>F]Z)]} I=K|1 Yk
yB try{ SJ8|~,vL URL url = new URL(sURL); N6%M+R/Q HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); YF<U'EVU- httpConnection.setRequestProperty("User-Agent","NetFox"); >d$Sh`a6 String sProperty = "bytes="+nStartPos+"-"; |Q*{yvfEo httpConnection.setRequestProperty("RANGE",sProperty); L'<.#(| Utility.log(sProperty); T&s}~S=m 9M1 UkS$`@ Q ;$NDYV1 InputStream input = httpConnection.getInputStream(); zfm#yDf //logResponseHead(httpConnection); aui3Mq#f #iP5@:!Wm~ 9Vtn62+ byte[] b = new byte[1024]; c_FnJ_+ +f int nRead; kr>F=|R] while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Hjc *WTu { Qk`LBvg1 nStartPos += fileAccessI.write(b,0,nRead); "UTAh6[3oD //if(nThreadID == 1) nsy eid* // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ,nz3S5~ } ,_RPy2N tqicyNL P2sM3C Utility.log("Thread " + nThreadID + " is over!"); FmC
[u bDownOver = true; 4?.L+wL //nPos = fileAccessI.write (b,0,nRead); _A,mY6* } y~;w`5;| catch(Exception e){e.printStackTrace ();} Gc{s?rB_ } SX@zDuM } @V qI+5TA @&GfCg5Cb ]6z ;
M;F` //打印回应的头信息 Vl%jpjqP public void logResponseHead(HttpURLConnection con) p
_q]Rt { _e94 for(int i=1;;i++) C!6d`| { = `oGH String header=con.getHeaderFieldKey(i); zM!2JC if(header!=null) H:_R[u4r //responseHeaders.put(header,httpConnection.getHeaderField(header)); N_| '`]D Utility.log(header+" : "+con.getHeaderField(header)); DE" Y(;S else >!%F$$ break; 9y( 491"o } !TeI Jm/l } dI)
9@UL 4$_:a?9 ^Bu55q public void splitterStop() ~dlpoT { %rq/jC bStop = true; L}\~) } 8N9X1Mb| g<PglRr" `F4gal^ ^ } vmIt!x E>Lgf&R#W H?tX^HO:q /* ^~K[ bFbW **FileAccess.java go
B'C *//文件访问(定位,写) SCo; Ek package NetFox; O7lFg;9c` import java.io.*; L{Kl! ?yy,3: p^*A&7d:P public class FileAccessI implements Serializable{ V3c7F4\ ^b^}6L'Z //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 vfloha p RandomAccessFile oSavedFile; p d(W(-`8! long nPos; Q Zv}\C-c y87oW_"h 5Sx.'o$ public FileAccessI() throws IOException P9jPdls { +~f=L- > this("",0); 2VaKt4+` } (Fs{~4T dq^vK )>I-j$%=2 public FileAccessI(String sName,long nPos) throws IOException
e"&QQ-q { {.o@XP,. oSavedFile = new RandomAccessFile(sName,"rw"); 5[Uv%A?H#_ this.nPos = nPos; v:?l C<, oSavedFile.seek(nPos); ]8CgHT[^7 } d;.H9Ne '^%k TNn ]-cSTtO public synchronized int write(byte[] b,int nStart,int nLen) JsHD3 { DT vCx6:! int n = -1; p> g[: ~ try{ fi [4F oSavedFile.write(b,nStart,nLen); %uDH_J|^ n = nLen; v"-K-AQjB } 7>
8L%(7 catch(IOException e) Z7p!YTA { a!B"WNb+ e.printStackTrace (); _
o.j({S } 8p_6RvG }/2M?W0 CD[}|N return n; e%C_> } Y`rli ||4T*B06 i!EAs`$o` } qKTzigjj -tfUkGdx;l -ARks_\ /* \3`r/,wY **SiteInfoBean.java zPN:) */ wKKQAM6P1 package NetFox; us+z8Mz |Wr$5r k$ b) public class SiteInfoBean { q _Z+H4
hLj7i? " =6kH, private String sSiteURL; //Site's URL */2nh%>$ private String sFilePath; //Saved File's Path a|#TnSk private String sFileName; //Saved File's Name 8N \<o7t% private int nSplitter; //Count of Splited Downloading File N(V_P[]"*, F^81?Fi. pQ>|dH+. public SiteInfoBean()
N'i)s{' {//nSplitter的缺省值为5 2T(7V[C%9 //default value of nSplitter is 5 dz!m8D0 this("","","",5); G.`},c;A- } sNM ]bei PQp/&D4K w!'y,yb% public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) t<o7 S:a" { .f"1(J8 sSiteURL= sURL; uehu\umt= sFilePath = sPath; huW,kk<]y sFileName = sName; 7hTpjox2 this.nSplitter = nSpiltter; ~6IY4']m* OTl9MwW *jvP4Nz)k } "blq)qo) p]ujip ;dPaWS1D
public String getSSiteURL() lX.-qCV"B { h8X[*Wme return sSiteURL; at4JLbk } >]8(3&zd ~(8f Uob ` Nf public void setSSiteURL(String value) ="v`W'Pd { 8|^&~Rl4 sSiteURL = value; {Wi*B( } ]YtN6Rq/ 4wkv#vi7!- x;<0Gg~jB public String getSFilePath() `hdff0 { OTE,OCB[ return sFilePath; ZuybjV1/f6 } ;i\N!T{> )z\# 3E^qh03( public void setSFilePath(String value) Ar[|M2| { Qrt\bz h/} sFilePath = value; qZ'2M.; } }dpTR9j= Hy1$Kvub ('7$K public String getSFileName() >$TvCw { :L@n(buRN return sFileName; <D3mt Q } q&J5(9]O|L >~nr,V.q ^8_yJ=~V public void setSFileName(String value) Ln2FG4{ { |Y05 *!\P* sFileName = value; |Q%P4S"B? } } 6!/Nb qFwt^w p]EugLEmG public int getNSplitter() >h)kbsSU0z { !p).3Kx0 return nSplitter; Rx&O}>"E>l } >5#}/G& r'j88)^ IH dA2d?.] public void setNSplitter(int nCount) ^!\AT!OT { N|$9v{ j_ nSplitter = nCount; L7;~4_M9.V } Bh'fkW3 } Q5T3 !#_2 ![ l[c '%M |N /* 't}\U&L.{ **Utility.java p|.5;)%| */ y;Cs#eo package NetFox; V%s7*`U :\P@c(c{^C ioD8- public class Utility { <+g77NL X':FFD4h pT->qQ3; public Utility() 4h@,hY1# { pQBn8H|Y (O4oIU &{.IUg } K~vJ/9"|R cVW7I //线程睡眠 qsp.`9! public static void sleep(int nSecond) wDh]vH[ { ;&O?4?@4 try{ ah:["< z< Thread.sleep(nSecond); u_$4xNmQ } yy8-t2V catch(Exception e) hg" i;I { f(w>(1&/B e.printStackTrace (); O*l,&5 } ^#<L!yo^ } GNMOHqg4 qx5`lm~L //日志 5<dg@,\ public static void log(String sMsg) 8F8?1 { /RJ System.err.println(sMsg); _x<NGIz } BA:x*(%~ hz4?ku 6]b"n'G public static void log(int sMsg) Pl/ dUt_ { VQHB}Y@^ System.err.println(sMsg); _GG\SWm } s)]j X } xKSQz J;>epM;* }4Yz P 4 /* 7yfh4-1M **TestMethod.java ?"9h-g3`x} */ !.,wg'\P package NetFox; D8wf`RUt Dm}eX:'{ XG.[C> public class TestMethod { T"z<D+pN pr#%VM[':R gPKf8{#%e public TestMethod() o4kLgY !Q { ///xx/weblogic60b2_win.exe RhE~Rwbx try{ t<##0#xS. SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Qjfgxy] //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); le'RU1k SiteFileFetch fileFetch = new SiteFileFetch(bean); }N[X<9^Z fileFetch.start(); _cs(f<>oCO } \ZLi Y catch(Exception e){e.printStackTrace ();} O% T?+1E VC88re` ^y/Es2A#t } q~R8<G%YK $IE}fgA@5 0P5VbDv$r7 public static void main(String[] args) =PRQ3/?5 { =
J;I5:J new TestMethod(); c#N4XsG, } 4{uQ}ea } N5 5F5 点击下载更多相关资料
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