-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* /xzL!~g`6< **SiteFileFetch.java x!+a,+G */ F/Xhm91^ package NetFox; L z import java.io.*; x&d<IU)5 import java.net.*; _G|6xlO Lsdu:+- j>iM(8`t1 public class SiteFileFetch extends Thread { T5h[{J^ =Sq7U^(> y8@!2O4 SiteInfoBean siteInfoBean = null; //文件信息Bean sBwgl9 long[] nStartPos; //开始位置 cg5DyQ( long[] nEndPos; //结束位置 `g~-5Z~J FileSplitterFetch[] fileSplitterFetch; //子线程对象 AXCJFqk; long nFileLength; //文件长度 J,7\/O(`A boolean bFirst = true; //是否第一次取文件 vY6|V$ boolean bStop = false; //停止标志 xjpW<-)MLf File tmpFile; //文件下载的临时信息 53QP~[F8R] DataOutputStream output; //输出到文件的输出流 :`K;0`C+ DH%X+r //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) J98K:SAR public SiteFileFetch(SiteInfoBean bean) throws IOException ?0x;L/d]) { 21qhlkdc siteInfoBean = bean; 92i#It}-/ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ~ocr^V{"<~ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); wHmEt ORo if(tmpFile.exists ()) R)=<q]Ms { 79v&6Io bFirst = false; vuf|2!kh/ read_nPos();
^&}Y>O, } P_gQ-pF. else !ktr|9Bl { ~>n<b1}W nStartPos = new long[bean.getNSplitter()]; =6$( m}(74 nEndPos = new long[bean.getNSplitter()]; 1X5\VY>S`h } ;k0*@c* fOJyY[ dj=n1f+;[ B06/mKZ7 } y}VKFRky iq#Z\Y( &Lw| t_y public void run() [o~w>,a { ,<BTv;4p //获得文件长度 ?6Gq & //分割文件 5>HI/QG //实例FileSplitterFetch PJLA^e C7> //启动FileSplitterFetch线程 "7g: u- //等待子线程返回 qv:WC
TAn try{ Z+?j8(:n if(bFirst) 2+enRR~ { h5JXKR.1]c nFileLength = getFileSize(); ll#PCgIm
if(nFileLength == -1) S(Pal/-" { ;8@A7`^ System.err.println("File Length is not known!"); ,oCr6 ] } i<
ih : else if(nFileLength == -2) _
|; bh { nT>?}/S System.err.println("File is not access!"); ^%L$$V
nG } bke 1 F
' else >g?,BK@ { u1uY*p for(int i=0;i<nStartPos.length;i++) K"pfp !Y { 1#'wR3[+ nStartPos = (long)(i*(nFileLength/nStartPos.length)); Xf0pQ]8\ } 4&\m!s
for(int i=0;i<nEndPos.length-1;i++) @*oi1_q { TzOf&cs/r nEndPos = nStartPos[i+1]; l$FHL2?Cp } it.l;L_nW nEndPos[nEndPos.length-1] = nFileLength; `27? f$, } Kl*##qw! } 9u9#&xx "x{S3v4Rb5 GXAcyOV //启动子线程 Uz0mSfBp fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; G
-;Yua2\ for(int i=0;i<nStartPos.length;i++) ]?kf;A@ { ' :Te#S fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Cc^t&Eg siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), g$<@! nStartPos,nEndPos,i); R}0cO^V Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); S^_na]M"4 fileSplitterFetch.start(); ?0.+DB
$ } th]9@7UE, // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), xkX,
l{6 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); htjJ0>& // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", (]ORB0kl nEndPos = " + nFileLength); zn M"P|A // fileSplitterFetch[nPos.length-1].start(); S\C wtY#8'^$& lU@ni(69d //等待子线程结束 d.{RZq2cp //int count = 0; 1:,aFp>qr //是否结束while循环 wj/r)rv
E boolean breakWhile = false; ua0k)4| Sh"} c2 M?_VYK while(!bStop) NE(6`Wq` { 4'{j'kuv write_nPos(); 9 Hm!B )Y Utility.sleep(500); bC&_OU: breakWhile = true; U $+rlw} l_8t[ s?=J#WV1y for(int i=0;i<nStartPos.length;i++) _h5@3>b3r { H}:apRb if(!fileSplitterFetch.bDownOver) 3&}wfK]X { /_ LUys/0 breakWhile = false; 7c+u+Yet break; %3q@\:s } 5SDHZ?h } j"c"sF\q if(breakWhile) 2qN6{+] break; U'@_fg nGRF<2! 7OT}V}iP //count++; d/;oNC+ //if(count>4) }ulFW]A^7 // siteStop(); 39u!j|VH } u tQ_!3u gP<l t.]oLG22r System.err.println("文件下载结束!"); ?bbguwo~F } u%&zY97/ catch(Exception e){e.printStackTrace ();} JeiW
z1t } 6N]v9uXZ ^oA^z1>3
pO"V9[p] //获得文件长度 wKwireOs public long getFileSize() |,qz7dpe { C7PHZ`< int nFileLength = -1; 1(C%/g#" try{ 8TuOf(qE URL url = new URL(siteInfoBean.getSSiteURL()); Z,ag5 w`]L HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Lx2.E1?@ httpConnection.setRequestProperty("User-Agent","NetFox"); Y(<>[8S m u+S*D\p<` a?@j`@]ZR~ int responseCode=httpConnection.getResponseCode(); kRG-~'f%` if(responseCode>=400) iX~V(~v { YT#"HYO processErrorCode(responseCode); [_${N,1 return -2; //-2 represent access is error #SQFI;zj } T#T!a0 w(s"r p} eRD s?n3F String sHeader; mw.9cDf JgEpqA12 aWW|.#L for(int i=1;;i++) r lW { 1J^{h5?lU //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); -p9|l%W //Utility.log(in.readLine()); RzNv| sHeader=httpConnection.getHeaderFieldKey(i); {V8v
if(sHeader!=null) AOeptv^k3} { 9QZ;F4 r if(sHeader.equals("Content-Length")) Xa+ u>1"2" { Ao 1*a%-. nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); O7:JG[tR* break; i9W@$I,f } a&|aK+^8; } entO"~*EX else C2FewsRz break; s4t>/.;x } :rwF5 } "5]GEzM3O catch(IOException e){e.printStackTrace ();} ^O4.$4t| catch(Exception e){e.printStackTrace ();} WM:we*k8h r=<,`_@Y 7+=fD|Cl Utility.log(nFileLength); ]0g<][m lY0^Z &R>x;&Gj return nFileLength; T[L } HBeOK 9aYCU/3 ,M5J~Ga //保存下载信息(文件指针位置) T+RfMEdr private void write_nPos() KZJ;O7'` { Kp8!^os try{ W|;
.G9 output = new DataOutputStream(new FileOutputStream(tmpFile)); vY:A7yGW output.writeInt(nStartPos.length); !3}vl
Y1 for(int i=0;i<nStartPos.length;i++) O0c#-K.f { 3\G&fb|?}R // output.writeLong(nPos); V#=o< output.writeLong(fileSplitterFetch.nStartPos); &.;t dT7 output.writeLong(fileSplitterFetch.nEndPos); A)&OR]0[ } 5q}680s9+ output.close(); g.zJ[- } I[G<aI! catch(IOException e){e.printStackTrace ();} QVm3(;&' catch(Exception e){e.printStackTrace ();} {088j?[hzk } vEOoG>'Zq 0k0y'1SL D?;$:D" //读取保存的下载信息(文件指针位置) Jah~h44& private void read_nPos() +hqsIx { -BgzAxa try{ RL
SP?o2J DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); +m]$P,yMt int nCount = input.readInt(); bncIxxe nStartPos = new long[nCount]; .{*V^[. nEndPos = new long[nCount]; ;}ileLTl for(int i=0;i<nStartPos.length;i++) mn)kd { &U*=D8!0 nStartPos = input.readLong(); SZea[~& nEndPos = input.readLong(); 1|Us"GQ(n } ZV$qv=X input.close(); Z>{3t/` } nPD5/xW catch(IOException e){e.printStackTrace ();} -tlRe12 catch(Exception e){e.printStackTrace ();} oyiEOC } ng;,;o. %c*azo. Wf +j/RxTi private void processErrorCode(int nErrorCode) mvyqCOp 0 { )#N)w5DU System.err.println("Error Code : " + nErrorCode); CfNHv-jDL } KW]/u a=+qR:wT !U/iY%NE //停止文件下载 7loIX Qw public void siteStop() qCi6kEr { 3.Oc8(N^} bStop = true; lED-Jo2 for(int i=0;i<nStartPos.length;i++) `BG{\3> fileSplitterFetch.splitterStop(); zB kS1qMn Po#;SG#Ee : " 9F.U } I9-vV>:z } Y9F!HM-` //负责部分文件的抓取 |W];8 **FileSplitterFetch.java n[H3b} */ :UGc6 package NetFox; . T6fPEb Pwn"!pk 5*l~7R import java.io.*; 0'{0kE[wn import java.net.*; /f@VRME wws)**]J8 l*T>9yC public class FileSplitterFetch extends Thread { </3Shq BFmd`#{l ? >SC:{( String sURL; //File URL &=oW=g 2 long nStartPos; //File Snippet Start Position D<B/oSy long nEndPos; //File Snippet End Position /B73|KB+ int nThreadID; //Thread's ID 03Pa; n boolean bDownOver = false; //Downing is over g}
7FR({b boolean bStop = false; //Stop identical sDL@e33Yb FileAccessI fileAccessI = null; //File Access interface RsIR}.* B#9rqC Z[[o u?c public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException -]\cUQ0 { (\}>+qS[ this.sURL = sURL; x2(!r3a this.nStartPos = nStart; .>NhC" this.nEndPos = nEnd; >DeG//rv nThreadID = id; P$?3\`U; fileAccessI = new FileAccessI(sName,nStartPos);//定位 @AYO )Y8 } ?&W1lYY FTZ][ fm C)]O%q public void run() }YH@T]O} { !$P+hX` while(nStartPos < nEndPos && !bStop) P#H|at { Nn5z q] eSDRW /R7qR# try{ GP6-5Y"8 URL url = new URL(sURL); }JyWy_Y HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); m&(yx|a4+ httpConnection.setRequestProperty("User-Agent","NetFox"); |d\rCq > String sProperty = "bytes="+nStartPos+"-"; l ps
6lnh httpConnection.setRequestProperty("RANGE",sProperty); VDq4n;p1 Utility.log(sProperty); k$1ya7-@ d5mhk[p7\J *F|j%]k~ InputStream input = httpConnection.getInputStream(); 3)ac
//logResponseHead(httpConnection); Z".mEF-b *vqlY[2Ax m2{3j[ byte[] b = new byte[1024]; ij&_> int nRead; d:jD while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) yG -1g0 { eq+t% nStartPos += fileAccessI.write(b,0,nRead); 1~/?W^ir //if(nThreadID == 1) vcTWe$;Q // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); q y"VrR } Sp8Xka~5*# rV.04m, iy_'D Utility.log("Thread " + nThreadID + " is over!"); 0?59o!@h bDownOver = true; A??(}F L //nPos = fileAccessI.write (b,0,nRead); [!9dA.tF } +NL^/y<; catch(Exception e){e.printStackTrace ();} {Wp+Y9c[ } HPJ\]HV( } )vVt{g Ln/6]CMl >Hb>wlYR //打印回应的头信息 <8#Q5 public void logResponseHead(HttpURLConnection con) IH|PdVNtg { )QS4Z{)U for(int i=1;;i++) rrBu6\D { 1d)wE4c=Z String header=con.getHeaderFieldKey(i); wO:!B\e if(header!=null) f@U\2r //responseHeaders.put(header,httpConnection.getHeaderField(header)); 5A(zQ'6 Utility.log(header+" : "+con.getHeaderField(header)); .XD7};g else d3Dw[4 break; gx+bKGB` } F)P"UQ!\ } _cra_(b cm^:3(yYX |^&n\vXv public void splitterStop() QH%Zbt2qS { F&?55@b bStop = true; {B^V_TX2 } u%n6!Zx 9+<%74|, $B6CLWB } @pq#? *xm(K+j *=UxX ]0y /* Pp-\#WJ **FileAccess.java ie4keVlXc *//文件访问(定位,写) 9$[I~I#z package NetFox; qFEGV+ import java.io.*; ~P&Brn"=Rs .KiJq:$H a#H2H`% public class FileAccessI implements Serializable{ z"/Mva3| 4u}"ng
//RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 |GPR3%9 RandomAccessFile oSavedFile; 27mGX\T long nPos; !O=?n<Ex" =@%;6`AVcp B&^WRM;7t public FileAccessI() throws IOException ke.{wh\0 { VrL==aTYXs this("",0); .XPcH(q } jwsl"zL w`Q"m x* 0Y rdu,c public FileAccessI(String sName,long nPos) throws IOException RiHOX&-7 { Wn;B ~ oSavedFile = new RandomAccessFile(sName,"rw"); q-c9YOz_ this.nPos = nPos; Z9cg,#(D oSavedFile.seek(nPos); [e1kfw } Hg)5c!F7 l#7].-/ GdZ_ public synchronized int write(byte[] b,int nStart,int nLen) z{h#l!Edh { QmQsNcF~z int n = -1; Q`$Q(/ try{ gucd]VH oSavedFile.write(b,nStart,nLen); 9o-fI@9 n = nLen; G9?6qb: } en\shc{R]` catch(IOException e) Fv!zS.)` { rBBA`Ut@F e.printStackTrace (); y!6+jrI } mHTZ:84 4%l
@ emZ^d/A return n; uP,{yna( } s|3@\9\ ]8,:E ]`O B35zmFX|}N } 9G8n'jWyY cY/!z jO'+r'2B9 /* 3/sKRU **SiteInfoBean.java )h(Dt(2Wm */ &cj/8A5- package NetFox; _n9+(X3 $`q8-+{ \Y'#}J"dh public class SiteInfoBean { KM$5ZbCF: z-(#Mlq:! .H1kl)~V private String sSiteURL; //Site's URL nnBgTtsC] private String sFilePath; //Saved File's Path V\axOz! private String sFileName; //Saved File's Name .E!p private int nSplitter; //Count of Splited Downloading File }5n((7@X r,p6J7/lfS nquKeH public SiteInfoBean() *SkUkqP9z {//nSplitter的缺省值为5 )tQG5.to //default value of nSplitter is 5 e'<pw^I\ this("","","",5); 6T%5vg_};' } Y.$InQ gL J"w!Q\_ ]h (TZu public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) u7|{~D&f { e2#"o{+@ sSiteURL= sURL; wv,,#P sFilePath = sPath; (]'Q!MjGa sFileName = sName; ]+\@_1<ZI this.nSplitter = nSpiltter; />fP )56* 'BT}'qN T-7'#uB.m } 3Rid1;L0U OHnHSb'?\ $cO"1mu public String getSSiteURL() aubmA0w { <}pwFl8C) return sSiteURL; %
'>S9Ja3 } !O$ */7 yjvH)t/!. Hfer\+RX public void setSSiteURL(String value) ^G63GYh]y { .%+`e sSiteURL = value; xG<H${
k; } :" ZH u>;#.N/ S=O/W(ZB public String getSFilePath() -&Fxg>FrYb { %UJ!(_ return sFilePath; m{={a5GD } ^RkHdA 1E Lzzn RMB?H)p+ public void setSFilePath(String value) bwM>#@H { HtOo*\Ne sFilePath = value; jY-i`rJN } %8H*}@n w<_.T# fys@%PZq public String getSFileName() qs6yEuh# { k/nOz* return sFileName; {! RW*B } s-r$%9o5 Ah)OyO6 ssW+'GD public void setSFileName(String value) 6w K= { -tT{h4 sFileName = value; ,=lMtW } ^DHFP-G?e L>{E8qv>w p}.P^`~j public int getNSplitter() IS7g{:}=p { DLE|ctzj[7 return nSplitter; )rD] y2^< } !@-j!Ub oaI7j=Gp 7\^b+* public void setNSplitter(int nCount) Ns9cx { !U#kUj:4I nSplitter = nCount; `"[VkQFB/ } } oJ+2OepN } wP1dPl_j:0 ~fsAPIQ 0TSj]{[ /* r&"}zyL **Utility.java .hgc1 */ v%> ?~`Y package NetFox; ?[Q;275 EF0{o_ n6WSTh public class Utility { g'Ft5fQ"o/ %Zx/XMs}e IDzP<u8v public Utility() O:q}<ljp { GZQ)TzR J),7ukLu^ c[< lr } [w~teX0! N;D(_:^ //线程睡眠 OM]p"Jd public static void sleep(int nSecond) {AIP\ { RrLQM!~ try{ 5<4njo?k Thread.sleep(nSecond); {#q<0l } `a:@[0r0U catch(Exception e) 2U>1-p&dn { iUA2/ A e.printStackTrace (); 5gI@~h S } xpFu$2T6P. } e }/c`7M UuT>qWxQ8 //日志
.EH^1.|v public static void log(String sMsg) {^9,Dy_D { PK3)M'[ System.err.println(sMsg); ci5ERv` } 2DTH|Yv yt C{,g> \ ;Hj,z\ public static void log(int sMsg) /j
-LW1:N { i1vBg}WHN System.err.println(sMsg); n5UcivyX
} (W3R3>; } abD55YJY ;eG%#=> bm%2K@ /U /* 8[f]9P/i **TestMethod.java xQ1&j,R] */ ;^}cZ package NetFox; lZ^XZjwoM 2K,
1wqf' [$.oyjd public class TestMethod { H|F>BjXn5 \R&`bAd k K]@6&H-b| public TestMethod() 2|EHNy! { ///xx/weblogic60b2_win.exe BAmH2" try{ 6$SsdT|8B SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); '4HwS$mW3 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); U@D=.6\B SiteFileFetch fileFetch = new SiteFileFetch(bean); }'kk}2ej` fileFetch.start(); ]|Vm!Q } L4.yrA-]C% catch(Exception e){e.printStackTrace ();} XFYCPET :BMU c-[ wi*Ke2YKP } t]eB3)FX 1ErH \! bL
*; N3#E public static void main(String[] args) E'[pNU*"x- { X@x:
F|/P new TestMethod(); ^ 9;s
nr } "793R^Tz } }}t"^m s 点击下载更多相关资料
|