-
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
|
/* . r`[ **SiteFileFetch.java eP= j.$ */ tcOnM w package NetFox; 4_Y!el H) import java.io.*; &t6Tcy import java.net.*; %6i=lyH- `~nCbUUee =]b9X7} public class SiteFileFetch extends Thread { gZ` DT `bqzg 7$_
:sJ SiteInfoBean siteInfoBean = null; //文件信息Bean 7I3 :u+ long[] nStartPos; //开始位置 Jck"Ks long[] nEndPos; //结束位置 kl<g;3 FileSplitterFetch[] fileSplitterFetch; //子线程对象 )
,Npv3( long nFileLength; //文件长度 ?Aw3lH#: boolean bFirst = true; //是否第一次取文件 Qlh?iA boolean bStop = false; //停止标志 $G3@< BIN File tmpFile; //文件下载的临时信息 f3n~{a,[ DataOutputStream output; //输出到文件的输出流 u[EK#% _FsB6
G]mc //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) EfKntrom[ public SiteFileFetch(SiteInfoBean bean) throws IOException j^I!6j=ZX { +-ewE-:|L siteInfoBean = bean; z!Hx @){| //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 8ds}+TtbY tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); )X%oXc&C| if(tmpFile.exists ()) P`
]ps?l { fIkT"? bFirst = false; 3EOyq^I% read_nPos(); }]GbUC!Zb } J6auUm` ` else 4J}3,+ { L[. <o{ nStartPos = new long[bean.getNSplitter()]; rr )/`Kmv% nEndPos = new long[bean.getNSplitter()]; u){S$</ } ~U%j{8uH OG}KqG!n ?O7iK<5N @_Sp3nWdu } ^ZVOql& ~`[8"YUL vJThU$s- public void run() ?*+1~m> { 7@a\* |K6 //获得文件长度 Wr#~GFg //分割文件 ?(Bl~?zD //实例FileSplitterFetch eJaUmK: //启动FileSplitterFetch线程 !Bj^i
cR //等待子线程返回 y@ . b
4 try{ d?}hCo=/Xq if(bFirst) ]bu9-X&T& { JMePI%#8 nFileLength = getFileSize(); z Lw(@& if(nFileLength == -1) 8!4[#y< { u\3ZIb System.err.println("File Length is not known!"); pN+I]NgQ } _yJ|`g]U3 else if(nFileLength == -2) Ql8^]gbp+ { %omu System.err.println("File is not access!"); |D+p$^L } AysL-sqR else R8ZD#,; { U!NI_uk for(int i=0;i<nStartPos.length;i++) kQ[Jo%YT?E { |Eu*P nStartPos = (long)(i*(nFileLength/nStartPos.length)); &Ea"hd } WL/5 oj for(int i=0;i<nEndPos.length-1;i++) R#LGFXUj { i'iO H|s nEndPos = nStartPos[i+1]; nF|Oy0 } 4+I 3+a" nEndPos[nEndPos.length-1] = nFileLength; C[0MA ,^ } ogp{rY } xD^wTtT pJ6Jx( Rdj8*f //启动子线程 )r#,ML fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; hpas'H>J for(int i=0;i<nStartPos.length;i++) J@gm@ jLc { K4Y'B
o4 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $E @ouX? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), jJ<;2e~OW nStartPos,nEndPos,i); (gDQ\t@3- Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *?p
^6vO
fileSplitterFetch.start(); $r):d } Lz?*B$h // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), bw020@O* siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 7?,7TR2Ny // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Nuo^+z
E nEndPos = " + nFileLength); ~W3:xnBEk // fileSplitterFetch[nPos.length-1].start(); ;/R kMS _hWuAJ9Qy 0W_mCV //等待子线程结束 X*)?LxTj //int count = 0; '9"%@AFxZ //是否结束while循环 {=qEBbM boolean breakWhile = false; [bsXF# wePI*."] fw:7U%MGv while(!bStop) |SxMN%M! { %fBP:5%K write_nPos(); 4?v$<=#21* Utility.sleep(500); r:73uRk breakWhile = true; G LoiH#R {wHvE4F2 2+o! o for(int i=0;i<nStartPos.length;i++) ^glX1 ) { {N"*olx if(!fileSplitterFetch.bDownOver) 7MoR9,( { z>7=k`x`: breakWhile = false; }'v{dK break; %uj[ ` } .(JE-upJ" } hRa\1Jt>a if(breakWhile) *^uGvJXF break; :Jm!=U%'Z 3Fgz)*Gu] ?P%|P //count++; %n4@[fG%K //if(count>4) +;YE)~R? // siteStop(); vUqe.?5 } 4Q@\h=r b'&LBT7 nT#37v System.err.println("文件下载结束!"); &yB%QX{3 } =,O/,2) catch(Exception e){e.printStackTrace ();} )dqR<) } 7:z>+AM[r ' 4,y hN[X 1* //获得文件长度 *B%y`cj| public long getFileSize() zf`5>h| { -Sx0qi'% int nFileLength = -1; aXX,Zu^ try{ 4{Q$!O> URL url = new URL(siteInfoBean.getSSiteURL()); 1k$2LQ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); eU`;L[ httpConnection.setRequestProperty("User-Agent","NetFox"); F|6
nwvgq ";75 6'> 0T(O'v}. int responseCode=httpConnection.getResponseCode(); E1#H{)G if(responseCode>=400) 0h^uOA; c { N`f!D>b:dn processErrorCode(responseCode); Rq"VB.ef&{ return -2; //-2 represent access is error dJloH)uJZ> } 04P.p6
c^rC8E y:~eU String sHeader; ,|6Y\L S> .q5 UVz=QEuYb for(int i=1;;i++) =sxkr ih { J0&zb'1 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Tc9&mKVE%( //Utility.log(in.readLine()); ,?Ok[G!cm sHeader=httpConnection.getHeaderFieldKey(i); TFNUv<>X if(sHeader!=null) j[_t6Z { )uANmThOz if(sHeader.equals("Content-Length")) _MGNKA6JI { ;9}w|!/ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); o1
jk= break; ,<7"K& } <_=JMA5 } G}182"#4 else C\y[&egww break; 2=jd;2~ } ~azF+}x90N } eH ;Wfs2f catch(IOException e){e.printStackTrace ();} o^8*aH)I>Y catch(Exception e){e.printStackTrace ();} 4 U3C~J Tw2Xe S =g/4{IL% Utility.log(nFileLength); :8](&B68gE @m5O{[euj< (}9cD^F0n return nFileLength; $$k7_rs } r5D jCV" <9=zP/Q X'YfjbGo //保存下载信息(文件指针位置) qsD?dHi7 private void write_nPos() !>CE(;E>z { V+Y|4Y& try{ R
4 DM_u output = new DataOutputStream(new FileOutputStream(tmpFile)); XPar_8I output.writeInt(nStartPos.length); d^ 2u}^kG for(int i=0;i<nStartPos.length;i++) sGXp}{E9 { f1)HHUB // output.writeLong(nPos); W/#KX}4 output.writeLong(fileSplitterFetch.nStartPos); Kl4isGcr] output.writeLong(fileSplitterFetch.nEndPos); 7h(HG?2Y } ) ~ l\ output.close(); VI(RT-S6 } i6-wf Gs; catch(IOException e){e.printStackTrace ();} >L#];| catch(Exception e){e.printStackTrace ();} 3 %z } b\kN_ h=uiC&B Is4%}J!8 //读取保存的下载信息(文件指针位置) :Tlf4y:/w private void read_nPos() *>EI2HX { 8dV.nO try{ l\q*%'Pe DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); s@[C&v int nCount = input.readInt(); |Dl*w/n
nStartPos = new long[nCount]; }@3Ud'
Y nEndPos = new long[nCount]; w%>aR_G for(int i=0;i<nStartPos.length;i++) 5x:Ift
* { MDMtOfe| nStartPos = input.readLong(); j)g_*\tQ nEndPos = input.readLong(); i58ZV`Rk` } 5W*7qD[m input.close(); O<}ep)mr } }wvwZ`5t catch(IOException e){e.printStackTrace ();} hu bfK~ catch(Exception e){e.printStackTrace ();} 9V|E1-")E } 1~["{u |
\ s2 &p/S>qKu# private void processErrorCode(int nErrorCode) :iP>z}h { |pfhrwJp System.err.println("Error Code : " + nErrorCode); >t1_5 } QH@Q\
@, fG:PdIJ7_ Xz;et>UD*B //停止文件下载 .OVW4svX public void siteStop() lcu( "^{3 { FQ;4'B^k] bStop = true; <dju6k7uz for(int i=0;i<nStartPos.length;i++) ;cM8EU^. fileSplitterFetch.splitterStop(); !yoSMI- <'PR;g^# v7s] } XNc"kp? z } .8u$z`j //负责部分文件的抓取 d$2@, **FileSplitterFetch.java [VY8?y */ A)b)ff , package NetFox; tIz<+T_ ig2{lEkF dzjB UD import java.io.*;
:BewH?Ku import java.net.*; 2ApDpH`fiJ 8m#}S\m 3v8V*48B$ public class FileSplitterFetch extends Thread { }-REBrb- Cfv L)f .){e7U6b{ String sURL; //File URL Uq<a22t@ long nStartPos; //File Snippet Start Position 9@KUqoX long nEndPos; //File Snippet End Position {:};(oz)f int nThreadID; //Thread's ID k| _$R? boolean bDownOver = false; //Downing is over '1>g=Ic0 boolean bStop = false; //Stop identical =oL8d6nI FileAccessI fileAccessI = null; //File Access interface YtwmlIar` \Dvl%:8 /0B07B public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException no~O R Q { `^ieT#(O this.sURL = sURL; yj}bY?4I this.nStartPos = nStart; Ns+)Y^(5 this.nEndPos = nEnd; =yk Rki nThreadID = id; R-r+=x& fileAccessI = new FileAccessI(sName,nStartPos);//定位 4*p_s8> > } 9%p7B ~}E O:oU`vE .u&&H_ UmE public void run() KKeb ioW { SY!`a:It while(nStartPos < nEndPos && !bStop) 4_6W s$x { RZ#alFL, JfZL?D{NM C ?GvTc try{ ^%K1R; URL url = new URL(sURL); ;,F-6RNj HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 8]cv &d1f httpConnection.setRequestProperty("User-Agent","NetFox"); tJ?qcT? String sProperty = "bytes="+nStartPos+"-"; `l[6rf_. httpConnection.setRequestProperty("RANGE",sProperty); 1S*8v 7 Utility.log(sProperty); w>NZRP_3 ?/`C~e<J R`Ys;g/! InputStream input = httpConnection.getInputStream(); <;$Sa's,LE //logResponseHead(httpConnection); .c=$ bQ>^ u%+6Mp[E jQ.>2-;H9 byte[] b = new byte[1024]; !uj! int nRead; Lu8%qcC while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) nhVK? { TnvHO_P, nStartPos += fileAccessI.write(b,0,nRead); kbIY%\QSO //if(nThreadID == 1) JEK%yMj // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); F"B<R~ } Sah<sb= }$&T
O$LX mr{k>Un\ Utility.log("Thread " + nThreadID + " is over!"); %:'1_@Ot2 bDownOver = true; @!L@UP0 //nPos = fileAccessI.write (b,0,nRead); t7C!}'g&' } |:7EJkKZ catch(Exception e){e.printStackTrace ();} FT*yso:X/ } 6SW|H"!! } ND9n1WZ&x u):%5F/ WryW3];0OR //打印回应的头信息 )*^OPVt public void logResponseHead(HttpURLConnection con) >j(I[_g { Q>SPV8s for(int i=1;;i++) O" X!S_R { c"f-$^< String header=con.getHeaderFieldKey(i); 7(A
G] if(header!=null) I&'S2=s //responseHeaders.put(header,httpConnection.getHeaderField(header)); M\Uc;:) H Utility.log(header+" : "+con.getHeaderField(header)); 2HvTM8 else +H)!uLvaB break; V',m $ } ^td!g1"< } jt'Y(u]2 8^P2GG'+- &;NNUT>Q public void splitterStop() Q^1#xBd { eu}:Wg2 bStop = true; vjs|!O=oH } gNEzlx8A H649J)v+m yO$r'9?,* } VuO) &|'Kut?8 .swgXiRvs /* J#Ne:Aj_ **FileAccess.java C$2o
o@
*//文件访问(定位,写) }OX>( package NetFox; _Ssv:xc, import java.io.*; %b-;Rn tvj'{W >PTu*6Z public class FileAccessI implements Serializable{
eo<~1w WoClTb>F //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 -Iruua7b RandomAccessFile oSavedFile; 8CnvvMf long nPos; 5JU(@}Db X*>o9J45V \DcC1W public FileAccessI() throws IOException ys.!S.k+ { :nbW.B3GV this("",0); $E4O^0%/p } X('Q;^` `3>)BV<P L!+[]tB public FileAccessI(String sName,long nPos) throws IOException )K\k6HC. { 6&OonYsP oSavedFile = new RandomAccessFile(sName,"rw"); uc"[ qT(X this.nPos = nPos; My6]k?;}( oSavedFile.seek(nPos); J<5vs3[9 } vUIK4uR. tI!R5q;k bb
O;AiHD public synchronized int write(byte[] b,int nStart,int nLen) soQv?4 { !Lg}q!*%>V int n = -1; w=P<4bdT try{ {6=H/g=:i oSavedFile.write(b,nStart,nLen); MeK\eZ\ n = nLen; y?R <g^A } fbx;-He! catch(IOException e) -fSKJo#}| { i/O,`2 e.printStackTrace ();
&' Nk2{ } $CQwBsYb= EbwZZSds1 (PT?h>|St return n; g6a3MJV` } c J"]yG)= d,Dg"Z Z#cU#)`y1 } um0}`Xq ^ q2j}64o_S B'BbTI, /* }&C!^v
o **SiteInfoBean.java HU'`kimWb */ [%)B%h`XGf package NetFox; KbuGf$Bv gx>mKSzy 7q{v9xKy public class SiteInfoBean { BI]ut|Qw ~cg+BAfu W*/s4 N private String sSiteURL; //Site's URL n`I
jG private String sFilePath; //Saved File's Path nO.+&kA private String sFileName; //Saved File's Name ;~1/eF private int nSplitter; //Count of Splited Downloading File @Ozf}}# M:Y!k<p YT 03>!B public SiteInfoBean() '`goy%Wd {//nSplitter的缺省值为5 CK`3 //default value of nSplitter is 5 }yC,uEV this("","","",5); ,w58n%)H } kV(DnZ#jq kq.R(z+ . =foXN public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 9q,JqB { |Nd.'|g, sSiteURL= sURL; JU%yqXO sFilePath = sPath; W-ND<=:Up sFileName = sName; MPEBinE? this.nSplitter = nSpiltter; Nxs%~wZ ThQEQ6y Ynh4oWUp } {^19.F @XG`D>%k +sbacMfq public String getSSiteURL() [;LPeO { >dC(~j{ return sSiteURL; b%~3+c } R\Ynn^w
?yM/j7Xn 2'^OtM, public void setSSiteURL(String value) H2_>Av{m { Zz*mf+ sSiteURL = value; [6gHi.`p' } %Ja{IWz9L ]A<u eM AQNx% public String getSFilePath() fD}]Mi:V { <.%8j\j( return sFilePath; z^HlDwsbm } 8RT0&[ 0}C}\1 ps;o[gB@5 public void setSFilePath(String value) Eq.zCD8A { wm`"yNbD sFilePath = value; %>:)4A } :<7>-+pa V^5k>`A A)a+LW'=u public String getSFileName() 4Jy,IKPp { j<-o{6r return sFileName; "N:]d*A\ } "=TTsxyM6P $mg h.3z0 m3!MHe~t public void setSFileName(String value) 8uD%]k=#! { <^c0bY1 sFileName = value; nk,Mo5iqV } T`<k4ur `e;Sjf< ZTz(NS
EK public int getNSplitter() x3F L/^S { #K*q(ei,7h return nSplitter; ]x{ H } _^sSI<&m ^
J@i7FOb !Kqj&y5 public void setNSplitter(int nCount) E1Aa2 { NP`ll0s nSplitter = nCount; ?B:wV?-` } eOO*gM= } MP&4}De X_S]8Aa F7u%oLjr /* (=B7_jrl **Utility.java ^
/eSby */ |2` $g package NetFox; sWzXl~JbF ;8Q?`=a
SL5DWZ public class Utility { }nERQq&A XzFqQ-H @?AE75E{ public Utility() *jSc&{s~ { T $]L 5 >a~FSZf \V\ET } TbM*?\7 `.Q3s?1F //线程睡眠 0# GwhB public static void sleep(int nSecond) 3/<^R}w\
{ J-?(sjIX try{ j'b4Sbs-f Thread.sleep(nSecond); 4KB?g7_* } *njB
fH' catch(Exception e) bv" ({:x { Bm>(m{sX> e.printStackTrace (); iEO2Bil] } EB<tX`Wp } #yxYL0CcA: hpKc_|un //日志 :WTvP$R public static void log(String sMsg) S$:S*6M@" { iJ#oI@s System.err.println(sMsg); QZP;k!"w } 9:5NX3"p td$Jx}'A Z4sjH1W public static void log(int sMsg) TyXOd,%zl { IUG.q8 System.err.println(sMsg); Efd[ZJxS6 } `G{t<7[[; } HYa!$P3}[ AU\!5+RDB ZWW}r~d{ /* v)pWx0l= **TestMethod.java W]]2Uo. */ t$%}*@x7 package NetFox; GUZi }a|= ?E+XD'~ ;!Bkk9r"H public class TestMethod { 5mBk[{ CBHWMetJ* cne[-E public TestMethod() sTY l' Ieg { ///xx/weblogic60b2_win.exe 1 SZa\ ][@ try{ 5n#&Hjb*F0 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); D4T+Gk"n //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); |,f6c
Omf SiteFileFetch fileFetch = new SiteFileFetch(bean); B}T72!a fileFetch.start(); l/M+JT~R } g}h0J%s catch(Exception e){e.printStackTrace ();} I[ C.iILL J(L$pIM p 1fnuN |, } 3P>@ : Dn!V)T Fm{y.URo
public static void main(String[] args) |mX8fRh { C*<LVW{P new TestMethod(); |a3b2x, } --D`YmB } _"TG:RP 点击下载更多相关资料
|