-
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
|
/* z{8bvuE **SiteFileFetch.java TtK[nP */ ;o
6lf_ package NetFox; #oS<E1 import java.io.*; )\1QJ$-M& import java.net.*; U#0Q) 46}g7skD .ODU public class SiteFileFetch extends Thread { y;4OY 4(#'_jS 1NbG>E#Ol SiteInfoBean siteInfoBean = null; //文件信息Bean R6 y#S&]x long[] nStartPos; //开始位置 ^+*N%yr long[] nEndPos; //结束位置 5 )A1\ FileSplitterFetch[] fileSplitterFetch; //子线程对象 *1ilkmL% long nFileLength; //文件长度 >,v`EIg boolean bFirst = true; //是否第一次取文件 eln)BW# boolean bStop = false; //停止标志 HSw;^E)1 File tmpFile; //文件下载的临时信息 2% MC Yn DataOutputStream output; //输出到文件的输出流 im${3 >26
YC*"Thuu //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) lz/8 public SiteFileFetch(SiteInfoBean bean) throws IOException =h-U
{ t0( A4E siteInfoBean = bean; ZAW^/bo< //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 9#23FK tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Yc`o5Q\> if(tmpFile.exists ()) Fh)IgzFj { 48J@CvU bFirst = false; >>QY'1Eu read_nPos(); T tfo^ksw } t^UxR@l<K| else S%$ }( { ^8]NxV@l nStartPos = new long[bean.getNSplitter()]; )~&CvJ nEndPos = new long[bean.getNSplitter()]; aacpM[{f } n|6Ic,:[ aR[JD2G uY{|szC^2 PoHg,n] } :>rkG?NfL $1SPy|y 0$(WlP| public void run() \/93Dz { 0^v`T%|fTX //获得文件长度 R1s`z|? //分割文件 'Y?"{HZ //实例FileSplitterFetch x/%aM1"X^ //启动FileSplitterFetch线程 1]d!~ //等待子线程返回 ,D5cjaX< try{ d}Xr} if(bFirst) fIM,lt { )n1_(; nFileLength = getFileSize(); /~DI 6g if(nFileLength == -1) fPU`/6 { k}S :RK System.err.println("File Length is not known!"); goLL;AL } 3_C|z,\: else if(nFileLength == -2) pXtl
6K% { ^Xz@`_I System.err.println("File is not access!"); ?#Ge.D~u } x" 7H5< else |a8iZ9/D6 { B=U 3
for(int i=0;i<nStartPos.length;i++) y3vdUauOn { dR
K?~1 nStartPos = (long)(i*(nFileLength/nStartPos.length)); bes<qy } 4M^=nae for(int i=0;i<nEndPos.length-1;i++) oxr#7Ei0d { yyR0]NzYUD nEndPos = nStartPos[i+1]; pk>^?MO } IWk4&yHUAu nEndPos[nEndPos.length-1] = nFileLength; Lk|hQ
} !zBhbmlKt } \h+AXs<j JX<)EZ!F &g#@3e1> //启动子线程 }?lrU.@zg fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; sm9k/(- for(int i=0;i<nStartPos.length;i++) _qU4Fadgm { C=-=_>Q,L< fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 3W V"U siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), zlyS}x@p nStartPos,nEndPos,i);
3Nl <p"= Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); p$O.>
[ fileSplitterFetch.start(); 3N8t`N } zh%#Y_[R // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), PoNi"Pv siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 9q)Kfz // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", CZ8KEBl nEndPos = " + nFileLength); \TIT:1 // fileSplitterFetch[nPos.length-1].start(); ]{!U@b eFipIn)b bT</3>+C //等待子线程结束 /Jta^Bj //int count = 0; Y&`=jDI //是否结束while循环 W'els)WJ|x boolean breakWhile = false; hC:n5]K JR' q~
tz? T_ while(!bStop) 88Ey12$ { 6e (Qwt write_nPos(); xP_cQwm`1 Utility.sleep(500); a@8v^G breakWhile = true; `Nv=B1 w}L]X1#sF Y2|#V# for(int i=0;i<nStartPos.length;i++) 3s5z
UT; { RPwbTAl} if(!fileSplitterFetch.bDownOver) C,wL0Yj[ { 0;hqIJcE:\ breakWhile = false; >f^r^P break; Y1L[;)H n } Uq[>_"} } uyO/55;HO if(breakWhile) f0A{W/0n break; 'SO %)B :8I9\eet3 9FoHD //count++; vGvf<ra;H //if(count>4) ^/)^7\@ // siteStop(); d^@ dzNv } @#<D ^" Wfu(* '>NCMB{* System.err.println("文件下载结束!"); 7jxslI&F } ?:pP8/y catch(Exception e){e.printStackTrace ();} 0\H\lKcK } |<HPn4
,X wYdb*"R QFE:tBHe //获得文件长度 6O|@xvg public long getFileSize() oOnop-z7 { .RE:;<|w int nFileLength = -1; 2^Eg9y' try{ fA&k`L(y URL url = new URL(siteInfoBean.getSSiteURL()); k@\ iGqo HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); VX].3=T8 httpConnection.setRequestProperty("User-Agent","NetFox"); >i_2OV j@=%_^:i R}'bP int responseCode=httpConnection.getResponseCode(); R(!s if(responseCode>=400) UXeN 8 { ;"KJ7p processErrorCode(responseCode); mkMq return -2; //-2 represent access is error yu;+o3WlK } t!* ?dr kv]~'Srk Z"Zmo>cV4 String sHeader; 3Ko/{f hM@
H A |pm7 _[ for(int i=1;;i++) pyH:#5 { O&vVv _zh //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ?*2CpM&l
//Utility.log(in.readLine()); &?W0mW( sHeader=httpConnection.getHeaderFieldKey(i); 2I%MAb&1@ if(sHeader!=null) %;cddLQ\xY { %.vQU @2A if(sHeader.equals("Content-Length")) .nB0 h { 83E7k]7] nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); uya.sF0]9B break; ;l4[%xld } #G.ulX } 3%l*N&gsg: else ]@dZ{H| break; ?b*s.
^ } }]e-{C} } ?Fi=P# catch(IOException e){e.printStackTrace ();} ]|!OP catch(Exception e){e.printStackTrace ();} F{Z~ R
}e!x5g N+++4; Utility.log(nFileLength); ! _f9NK YT8vP~ 5}:-h> return nFileLength; ?u-|>N> } :S.9eFfa OJ,` j`oy`78O //保存下载信息(文件指针位置) YHkn2]^#A private void write_nPos() K:!"+q { W6f/T3 try{ !5.8]v output = new DataOutputStream(new FileOutputStream(tmpFile)); ,X#2\r<| output.writeInt(nStartPos.length); V}bjK8$$ for(int i=0;i<nStartPos.length;i++) ?/BqD;{?I { #EO9UW5 // output.writeLong(nPos); _
<WJ7 output.writeLong(fileSplitterFetch.nStartPos); 0F]>Jby output.writeLong(fileSplitterFetch.nEndPos); 'L
8n-TyL } @GkILFN output.close(); _hN\10ydY } c0PIc^R(@ catch(IOException e){e.printStackTrace ();} 1|RANy catch(Exception e){e.printStackTrace ();} os,* 3WO } ~kShq% cU;iUf |y&*MTfV4L //读取保存的下载信息(文件指针位置) J]v%q," private void read_nPos() [p{#XwN { &Nj3h(Ll try{ (}a8"]Z DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); { D^{[I int nCount = input.readInt(); xGu r nStartPos = new long[nCount]; H(bs$C4F nEndPos = new long[nCount]; V@Rrn <l for(int i=0;i<nStartPos.length;i++) b6}H$Sx~ { |rJ=Ksc nStartPos = input.readLong(); _(Sa4Vb=Q6 nEndPos = input.readLong(); .l>77zM6 } @{YS}&Q/ input.close(); ?!9)q.bW } iTFdN}U catch(IOException e){e.printStackTrace ();} "{tg8-a4) catch(Exception e){e.printStackTrace ();} TatpXN\ } (&}i`}v_ s~>d:'k7| 2Or'c`| private void processErrorCode(int nErrorCode) bu
|a0h7e { vI2^tX9 System.err.println("Error Code : " + nErrorCode); x$IX5:E#e } '$|[R98 V^JV4 `o Z3{>yYR+ //停止文件下载 ~Q?a|mV, public void siteStop() g6Q !8 { lL{5SH<Q bStop = true; >H'4{| for(int i=0;i<nStartPos.length;i++) {U!8|( fileSplitterFetch.splitterStop(); o=21|z fJ/e(t ])L
A42| } ?0)&U } Tsgk/e9K2? //负责部分文件的抓取
l7W 6qNB **FileSplitterFetch.java G]fRk^~ */ >;L6xt3 package NetFox; '@p['#\uI Fb^:V4<T WpF2)R}G= import java.io.*; x*?x=^I{ import java.net.*; #gp,V#T MKy[hT: zY,r9<I8_x public class FileSplitterFetch extends Thread { %1O;fQL p$h4u_ _h X]% String sURL; //File URL ;cPy1 long nStartPos; //File Snippet Start Position >)spqu] long nEndPos; //File Snippet End Position AI,(z;{P int nThreadID; //Thread's ID Sg6"WV{< boolean bDownOver = false; //Downing is over V#cqRE3XNi boolean bStop = false; //Stop identical x/;bu W- FileAccessI fileAccessI = null; //File Access interface UG)8D5 y>72{ W0epAGrB public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 2'_:S@ { Fb7#<h this.sURL = sURL; TQx.KM>y this.nStartPos = nStart; IG|X!l this.nEndPos = nEnd; o3I Tr'; nThreadID = id; fRtUvC-#H fileAccessI = new FileAccessI(sName,nStartPos);//定位 O)ME"@r@: } `t_W2y ,!dh2xNH^ j:E<p_T public void run() +RnkJ* l { J(c{y]` J while(nStartPos < nEndPos && !bStop) YN`H
BFH { ~v]!+`_J cfcim.jB _Y8hb!#( try{ po$ /7 URL url = new URL(sURL); O
[i#9) HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); JMH8MH* httpConnection.setRequestProperty("User-Agent","NetFox"); TiYnc3Bz}J String sProperty = "bytes="+nStartPos+"-"; >TQH|}|6(y httpConnection.setRequestProperty("RANGE",sProperty); +m8!U=Zi Utility.log(sProperty); &_~+( PI`jExL q{t*34R InputStream input = httpConnection.getInputStream(); NX|v= //logResponseHead(httpConnection); [k6nW:C [ {
bV4 mnmP<<8C, byte[] b = new byte[1024]; =$nB/K,8AX int nRead; .G+Pe'4a while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) M@?xa/E64 { p;W.lcO`0 nStartPos += fileAccessI.write(b,0,nRead); DdVF, //if(nThreadID == 1) :,J}z~I,lB // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); agjv{ } [1F*bI 'ow.=1N- Yc,7tUz# Utility.log("Thread " + nThreadID + " is over!"); Y7vA`kjD-C bDownOver = true; Sh?4ri@: //nPos = fileAccessI.write (b,0,nRead); _cc#Qlw 7 } sVJ!FC catch(Exception e){e.printStackTrace ();} ~-PjW#J% } :cGt#d6 } {K9/HqH _>9.v%5cs( Eh|]i;G% //打印回应的头信息 ,(;lIP public void logResponseHead(HttpURLConnection con) 3:8{"md@2 { P&b19 K' for(int i=1;;i++) nS&3?lx9_ { j{NNSi3 String header=con.getHeaderFieldKey(i); /Wy.>YC| if(header!=null) 'Er:a?88l //responseHeaders.put(header,httpConnection.getHeaderField(header)); z}{afEb Utility.log(header+" : "+con.getHeaderField(header)); #{=;NuP else x-?{E break; :PtF+{N> } 7{I h_.# } 1[jb)j1 (y M^ BM(]QUxRd public void splitterStop() '3<fsK= { +reor@h bStop = true;
~i21%$ } v@wb"jdFi$ [+OnV& D<V~f B } =e8bNg
2'5 ]~ vq!_^F< /* 7f~Sf **FileAccess.java _L@2_#h! *//文件访问(定位,写) ,2j.<g&
package NetFox; 5vw{b? import java.io.*; ^|TG$`M(w xCYE
B}o9r i:Zm*+Gi public class FileAccessI implements Serializable{ $2u 'N:o WdnIp! //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 JqMDqPIQ RandomAccessFile oSavedFile; %zSuK8kxV long nPos; fwBRWr9 OX"j# Dgx8\~(E' public FileAccessI() throws IOException J]q%gcM { %~jkB.\* ) this("",0); n_B"-n } P9S2?Q |QMhMGjV V=lfl1Ev0J public FileAccessI(String sName,long nPos) throws IOException *bxzCI7b { > ]8a3x oSavedFile = new RandomAccessFile(sName,"rw"); "3<da* D1 this.nPos = nPos; Zr-U&9.` oSavedFile.seek(nPos); JR@.R
,rII } j~FD{%4N STglw-TC\ 3LfC{ER public synchronized int write(byte[] b,int nStart,int nLen) in(U:04 { uio@r^Xz int n = -1; KL ?@@7 try{ :Dd$i_3= oSavedFile.write(b,nStart,nLen); +n7?S~R$ n = nLen; l27\diKPJ } TuW/N
L| catch(IOException e) 6:]*c[7 { 06Gt&_Q e.printStackTrace (); ;A'":vXmc } }=v)Js f}L*uw 0v]?6wX return n; 4&HXkRs: } b9"jtRTdz >/#KI~}'N _ib"b# } #BQ.R, $z$u{ 4]/7 )x?R /* p2N:;lXM **SiteInfoBean.java I(S)n+E */ 0x9x@gF package NetFox; iA,kX\nK >OP+^^oZ< f"(X(1F public class SiteInfoBean { c5Q<$86 &|aqP
\Q5 i[ $0a4 private String sSiteURL; //Site's URL >5wx+n)/) private String sFilePath; //Saved File's Path fi+R2p~vs private String sFileName; //Saved File's Name ~h"/Tce private int nSplitter; //Count of Splited Downloading File 5"/J^"!h .7
asW( *c)uGz'cD
public SiteInfoBean() /1 RAAa {//nSplitter的缺省值为5 \V>?Do7 //default value of nSplitter is 5 +`sv91c this("","","",5); gt\MS;jMa } :d8W+|1u cv(PP-'\ Q.Aw2 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) <jS~ WI@ { 5~.ZlGd sSiteURL= sURL; unJ R=~E sFilePath = sPath; 0A:n0[V:] sFileName = sName; fGv#s
X this.nSplitter = nSpiltter; zFQ&5@43 Q`#4W3-, !;Jmg } cD4
kC>P* TM8=U-A huudBc
A[ public String getSSiteURL() 5`]UE7gT { nr)c!8 return sSiteURL; 63!rUB!
} ?+c`]gO7N ~O 3D[PNW~ UA~RK2k? public void setSSiteURL(String value) {"vkji> { W-
$a
Y2 sSiteURL = value; 5/QRL\ } cE iu)2*e SI_iI 71 v_S4hz6w\ public String getSFilePath() zKFp5H1!%+ { fZKt%m return sFilePath; kGkA:g: } Y:ldR `imWc"'Ej 0GDvwy D1 public void setSFilePath(String value) m uW!xY { T<-=nX sFilePath = value; XCsiEKZ_i } PS
S?|Vk 'O6]0l Gq#~vr public String getSFileName() !TAp+b { as+GbstN return sFileName; $3X-rjQtW } O|cu.u| %~NH0oFO ZAuWx@} public void setSFileName(String value) l$*=<tV { Q{QYBh& sFileName = value; INSkgOo } }%TSGC4{ OndhLLz `N/RHb% public int getNSplitter() 6+K_ Z\ { ]=73-ywn] return nSplitter; d {2 } ~e@>zoM'^ @OV-KT[> k;dXOn public void setNSplitter(int nCount) z5Qs@dG { XA_FOw!cX nSplitter = nCount; +~nzii3 } _U|7'^ | } Xj+q~4{|vt wyxGe<1 :`vP}I ^ /* 6qo^2 **Utility.java >cL{Ya}Rz */ DZ
^1s~ package NetFox; s]27l3)B HjWq[[Nz =wi*Nd7L public class Utility { *oI*-C bVr*h2p Z<b"`ty. public Utility() Q}A=jew { qu6DQ@
~YC $trAC@3O@ r!N]$lB } w-N1.^ @LD6:gy //线程睡眠 [LM^),J? public static void sleep(int nSecond) Fs/? { IxDWJ#k try{ zGcqzYbuA Thread.sleep(nSecond); (3,.3)%` } 24\gbv< catch(Exception e) [IM%b~j(^ { &217l2X
/ e.printStackTrace (); u3tZ[Y2 c } (9fdljl],: } a?cn9i)# 5iFV;W //日志 VFD%h
} public static void log(String sMsg) MN;/*t { cJ}QXuuUv System.err.println(sMsg); oholt/gb+0 } 1@sM1WMX J_#R 87 0_<Nc/(P public static void log(int sMsg) @u4=e4eF` { ? S=W& System.err.println(sMsg); S9Y[4*// } nX%AeDBAT } =)<3pG O #'o7x'n^ msTB'0 /* ]Nk!4" **TestMethod.java s'a= _cN */ ;\)=f6N package NetFox; 3-wD^4)O, hY\{| p_terD: public class TestMethod { dXu {p CVKnTEs u"VS* hSH public TestMethod() K!8zwb=fq { ///xx/weblogic60b2_win.exe Aa(<L$e!` try{ CUmH,`hu SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); +QqH}=
M //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Zy]s`aa SiteFileFetch fileFetch = new SiteFileFetch(bean); z)L}ECZh9 fileFetch.start(); {/M\Q@j } ~5#)N{GbY catch(Exception e){e.printStackTrace ();} ?s{C// p%RUHN3G[ oFg'wAO. } }N3`gCy9eN XdIah<F2 JAb$M{t public static void main(String[] args) >2-F2E, { Z^6#4Q]YC new TestMethod(); CUhV$A#oo } *=nO } 2*[Un( 点击下载更多相关资料
|