-
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
|
/* 6QG"~>v7'( **SiteFileFetch.java @"O|[%7e */ S)=3%toS> package NetFox; *`~]XM@H import java.io.*; Y [%<s/ import java.net.*;
-wQ@z6R Fu[<zA^ @,pn/[ public class SiteFileFetch extends Thread { !B#tJD @ZcI]G% Z>W&vDeuN SiteInfoBean siteInfoBean = null; //文件信息Bean Ye[Fu/0 long[] nStartPos; //开始位置 l!}7GWj long[] nEndPos; //结束位置 RggZ'.\ FileSplitterFetch[] fileSplitterFetch; //子线程对象 H.[(`wi!I long nFileLength; //文件长度 9;A9Q9Yr boolean bFirst = true; //是否第一次取文件 2o0WS~}5 boolean bStop = false; //停止标志 asbFNJG{ File tmpFile; //文件下载的临时信息 2W)KfS DataOutputStream output; //输出到文件的输出流 O+~@S~ ;^8X(R //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 3X1
U public SiteFileFetch(SiteInfoBean bean) throws IOException h-*h;Uyc { $oi8<8Y siteInfoBean = bean; QEY#U| //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath()));
8oJp_sw tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); (i]0IYMXy* if(tmpFile.exists ()) ,k,+UisG { ,WS{O6O7 bFirst = false; kM(,8j read_nPos(); 2K{)8;^ } 0}$R4<"{Y> else 8oP"?ew# { ~fz9PoC nStartPos = new long[bean.getNSplitter()]; U{3Pk0rZ nEndPos = new long[bean.getNSplitter()]; <!~NG3KW[> } Gg5>~"pb E, |OMK# 12 bztlv i0[mU, } ? UBE0C zUJPINDb y~rtYI
public void run() PE2O$:b\ { NO.5Vy //获得文件长度 Xm^/t# //分割文件 r59BBW)M //实例FileSplitterFetch uBo~PiJ2" //启动FileSplitterFetch线程 }9Awv#+ //等待子线程返回 h%U,g
9_ try{ >F;yfv; if(bFirst) ++d[YhO { Opf^#6'mq nFileLength = getFileSize(); ~G8haN4 if(nFileLength == -1) :n$?wp { !]!J"!xg* System.err.println("File Length is not known!"); lBOxB/` } s^-o_K\*c else if(nFileLength == -2) e1 P(-V { jGOE
CKP System.err.println("File is not access!"); :&$WWv } gqACIXR else w(R+p/RF { L7$1 rO< for(int i=0;i<nStartPos.length;i++) O|0} m { cAzlkh nStartPos = (long)(i*(nFileLength/nStartPos.length)); :X#'ELo| } MK, $# for(int i=0;i<nEndPos.length-1;i++) +ZPn[| { F!ra$5u nEndPos = nStartPos[i+1]; E3h-?ugO' } WlnS.P\+E nEndPos[nEndPos.length-1] = nFileLength; j79$/ Ol
} JS0957K } lxOUV? m^N -^= JKd&p hg}R(.1K= //启动子线程 Z}$1~uyw fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; l =^ ^l` for(int i=0;i<nStartPos.length;i++) N##-
vV { >D*%1LH~V fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), MGSD;Lgn siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), y_f^ dIK*= nStartPos,nEndPos,i); &W-1W99auE Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <=PYu:]h fileSplitterFetch.start(); TDHS/"MbA7 } 4F?O5&329i // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), jMQ7^(9- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); kDK0L3}nr] // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Ky6 d{|H nEndPos = " + nFileLength); 5:X^Q.f; // fileSplitterFetch[nPos.length-1].start(); dZ'H'm;,! BYWs\6vK F}=O Mo:. //等待子线程结束 R'p-
4 //int count = 0; !yf7y/qY //是否结束while循环 }i@%$Ixsn boolean breakWhile = false; Gque@u $h8,QPy lyQNE3 while(!bStop) WO"<s{v { L QA6iZBP write_nPos(); 1|xo4fmV Utility.sleep(500); JD{AwE@Ro breakWhile = true; /7p1y v F`JW&r\ m15> ^i^W for(int i=0;i<nStartPos.length;i++) Dh B*k<S { )>8 k8E if(!fileSplitterFetch.bDownOver) 7xjihl3 { Q(ec>+oi breakWhile = false; `& }C*i" break; d m$iiRY } 3pI) } geEETb}+y if(breakWhile) "c0Nv8_G break; yc3i> w` I vD M2q8f ]:F?k#c //count++; f^9ntos| //if(count>4) pQ9~^ // siteStop(); `ls^fnJTpf } 0%>_fMa A 5qQ\ H} A6%~+9 System.err.println("文件下载结束!"); C#D8
E.W } :dj=kuUTbu catch(Exception e){e.printStackTrace ();} /D
~UK"} } _Q6` Wp6m uT2w2A; 5R/k8UZ //获得文件长度 H|/U0;s public long getFileSize() %E`=c]! { Jw)-6WJ!uO int nFileLength = -1; |g8Q.*"l[ try{ vN3uLz'< URL url = new URL(siteInfoBean.getSSiteURL()); TC^fyxq HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^)0b= (. httpConnection.setRequestProperty("User-Agent","NetFox"); YKG}4{T cy!;;bB o`}(1$a> int responseCode=httpConnection.getResponseCode(); g RBbL1 if(responseCode>=400) >\5I B5'j { {BS`v5* processErrorCode(responseCode); +DA,|~k_ return -2; //-2 represent access is error ( t59SY } -Vhxnh S ZIikDih1 ".Sa[A;~ String sHeader; YB3?Ftgw Nvj0MD{ X l fJ
lXD for(int i=1;;i++) U((mOm6 { fMZzR|_18 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); LGPPyKNx //Utility.log(in.readLine()); y?.l9
sHeader=httpConnection.getHeaderFieldKey(i); ^P}c0}^ if(sHeader!=null) ;LE9w^>^V { ~e#QAaXD#5 if(sHeader.equals("Content-Length")) Lm"zW>v { iK3gw<g nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); WDq~mi break; z`KP
}- } G+zIh}9 } w~l%xiC else xI(Y}> break; kH }HFl } 3KN>t)A# } &NB"[Mm:@ catch(IOException e){e.printStackTrace ();} 5;_&C=[ catch(Exception e){e.printStackTrace ();} ^U[yk'!Y D~LU3#n D|R aj\R Utility.log(nFileLength); >{@:p`* a<d$P*I(cH n06Jg+ return nFileLength; 6qH^&O][ } 0$\
j I!;vy/r :]+p#l //保存下载信息(文件指针位置) T f;:C] private void write_nPos() !(>yB;u { cLyed3uU try{ 32Jl|@8,g output = new DataOutputStream(new FileOutputStream(tmpFile)); kQQhZ8Ch output.writeInt(nStartPos.length); 0V5 {:mzA for(int i=0;i<nStartPos.length;i++) WSV[)-=: { Z|IFT1K // output.writeLong(nPos); Sxg&73;ZV output.writeLong(fileSplitterFetch.nStartPos); T,SCK^ output.writeLong(fileSplitterFetch.nEndPos); "pW@[2Dkx/ } ?Y|*EH output.close(); !p$k<?WX c } DX#_0-o catch(IOException e){e.printStackTrace ();} }Asp=<kCc catch(Exception e){e.printStackTrace ();} SlojB ^% } V07? sc< JTI 'W 2z615?2_U //读取保存的下载信息(文件指针位置) <N}*|z7=b private void read_nPos() nk^-+olm { n 9N'}z try{ ZK8I f?SD DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ct-;L' a int nCount = input.readInt(); o; Ns-= nStartPos = new long[nCount]; )'Yoii{dSU nEndPos = new long[nCount]; y_A?}'X for(int i=0;i<nStartPos.length;i++) nH -1,#`g { ]`GDZw` nStartPos = input.readLong(); SdOE^_@: nEndPos = input.readLong(); ?7CHHk } sksop4gu5 input.close(); 2=p"%YSn } g1zX^^nd,V catch(IOException e){e.printStackTrace ();} qs'ggF1 catch(Exception e){e.printStackTrace ();} <;.->73E } 2*1FW v s#2<^6 qc6eqE private void processErrorCode(int nErrorCode) jXALN { P<GHX~nB System.err.println("Error Code : " + nErrorCode); 8
y+N l&"V } cgvD>VUw <<:a>)6\ Gaxa~?ek //停止文件下载 p-1
\4 public void siteStop() Up|>)WFw" { Jb4A!g5C bStop = true; ?=X_a{}/ for(int i=0;i<nStartPos.length;i++) )ls<"WTC. fileSplitterFetch.splitterStop(); d[Lr`=L; G
oJ\6&" SX I3y } YDMimis\H5 } <dA1n:3o //负责部分文件的抓取 ;4 rTm@6 **FileSplitterFetch.java OK"B`* */ r=3knCEWK package NetFox; .0zNt :x<'>)6 {Z=m5Dy} import java.io.*; %95'oW)lo import java.net.*; ]{<`W5b/ /kY|PY F]SA1ry public class FileSplitterFetch extends Thread { SdTJ?P+m 7>`VZ? +#c3Y;JP String sURL; //File URL ~yvOR`2Gg long nStartPos; //File Snippet Start Position !7O!)WJ long nEndPos; //File Snippet End Position tsA+B&R_] int nThreadID; //Thread's ID "7k
82dw boolean bDownOver = false; //Downing is over UHEn+Tc> boolean bStop = false; //Stop identical M9/c8zZ FileAccessI fileAccessI = null; //File Access interface a|x1aN0 d:"]*EZ [ ByK!r~>Z1Q public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException ]$>O-- { PmGW\E[ni this.sURL = sURL; H-sJt: this.nStartPos = nStart; Q6 G-`&5 this.nEndPos = nEnd; wf<=rW' nThreadID = id; '$3]U5KOwK fileAccessI = new FileAccessI(sName,nStartPos);//定位 R{5xb } bJo)rM:m b$f@.L |@x^5Ab$T public void run() ]S6`",+)<f { {1Z`'.FU while(nStartPos < nEndPos && !bStop) LH4!QDK- { +%'S>g0W= q}PeXXH G 1rsd try{ c7[<X<yk URL url = new URL(sURL); U9[
&ci HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Gyak?.@R httpConnection.setRequestProperty("User-Agent","NetFox"); 4E`y*Hmzy+ String sProperty = "bytes="+nStartPos+"-"; s0 ZF+6f httpConnection.setRequestProperty("RANGE",sProperty); xm}9(EJ Utility.log(sProperty); >[=fbL@N<@ Ny@CP} RnN]m!"5 InputStream input = httpConnection.getInputStream(); [4NJ]r M% //logResponseHead(httpConnection); pcd*K) F_9e ju^| 2g elmQnc byte[] b = new byte[1024]; (5s$vcK int nRead; 4L RrrW while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) v)*/E'Cr* { prvvr;Ib nStartPos += fileAccessI.write(b,0,nRead); .{` : //if(nThreadID == 1) "lcNjyU\O // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); }Km+5'G'U } B>&Q]J+R |gvx^)ro @ 5!Mr5; Utility.log("Thread " + nThreadID + " is over!"); #V[j Q Vl bDownOver = true; g\CRx^s //nPos = fileAccessI.write (b,0,nRead); mXd,{b' } $4^cbk catch(Exception e){e.printStackTrace ();} eSNwAExm } 4l/hh|3@ } B{UL(6\B OOzk@j^ {sn RS)- //打印回应的头信息 WaY_{)x public void logResponseHead(HttpURLConnection con) !_Z\K$Ns { dzIcX*" for(int i=1;;i++) i6L>,^Dg { J*Dt\[X String header=con.getHeaderFieldKey(i); /5qeNjI+2 if(header!=null) J#h2~Hz! //responseHeaders.put(header,httpConnection.getHeaderField(header)); YP*EDb?f Utility.log(header+" : "+con.getHeaderField(header)); @>Y.s6a else d5zv8?|X+ break; |'$E-[ } :fo.9J } T5*
t~`bfU Wpgp YcPS ET t7?,x@ public void splitterStop() !t. { 5Lmhip bStop = true; #2`ST=# } 4R 9lA n}KF)W= =<,>dBs}\ } ,"MRA Z~&$s F#0y0| /* I4[sf **FileAccess.java /y8=r"'G *//文件访问(定位,写) C[E[|s*l package NetFox; $ z4JUr!m import java.io.*; s|p,UK Ll"
Kxg VFmG\ public class FileAccessI implements Serializable{ <1t.f}}uX vy:-a G //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 }XOTK^YA RandomAccessFile oSavedFile; pr\wI?:k long nPos; A_h|f5
gu~JB OTgctw1s public FileAccessI() throws IOException j ^Tb= { kn$2_I9 this("",0); _wp>AJ r } 3shRrCL0mf A_8UPGh8 U?@ s`. public FileAccessI(String sName,long nPos) throws IOException r6JQRSakR { ;u:A:Y4V oSavedFile = new RandomAccessFile(sName,"rw"); %S`ygc}| this.nPos = nPos; DGc5Lol~ oSavedFile.seek(nPos); nj90`O.K } ";kwh8wB =d+~l "YC5viX public synchronized int write(byte[] b,int nStart,int nLen) be<7Vy]j { QPD[uJ(I int n = -1; !iNN6-v% try{ =&_Y=>rA]0 oSavedFile.write(b,nStart,nLen); #F|q->2`o n = nLen; 0Z.X;1= } )ajF ca@v catch(IOException e) =<BPoGs5 { {)CN.z:O e.printStackTrace (); :@~Nszlb } pW7#&@AR >~F_/Z'5 De<kkR{4 return n; G?,b51" } p2=+cS"HC vkj Hh. y/.I<5+Bu } C j4ED 'NAC4to;; }J ^+66{ /* ^~7/hm: **SiteInfoBean.java JS!`eO/8 */ V*I2
package NetFox; G m~2s;/ V[#$Sz[G IaHu$` v public class SiteInfoBean { Z,"f2UJ :z^,>So : I1)t1%6"vJ private String sSiteURL; //Site's URL xf7_|l private String sFilePath; //Saved File's Path }2]m]D@%7 private String sFileName; //Saved File's Name )*`cJ_t private int nSplitter; //Count of Splited Downloading File %7v!aJ40 C}=9m
A ">M:6\B public SiteInfoBean() X(npgkVP\ {//nSplitter的缺省值为5 t%fcp //default value of nSplitter is 5 th^&wp this("","","",5); =M ."^X } #zed8I:w dr gCr:Gf B1k;!@@14 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) e6i m_ Tk { PLueH/gC . sSiteURL= sURL; MC~<jJ, sFilePath = sPath; v\G+t2{ sFileName = sName; 0..]c-V(G this.nSplitter = nSpiltter; ,382O$C w{"ro~9o "KKw\i } =`OnFdI 8zrLl:{ *cy!PF& public String getSSiteURL() r
E&}B5PN= { v
8B4%1NE return sSiteURL; ZkqZO#nq
C } X<<FS%:+ *q*$%H y1bo28 public void setSSiteURL(String value) PlRcrT"#w { 6=p!`DOd sSiteURL = value; Lk]W? } .c]@xoC jL0=a.; "Ky&x$dje public String getSFilePath() 5I&Dk4v { +QA|]Y~! return sFilePath; V$g!#V } w/@ tH gq050Bl) K$5mDScoJ public void setSFilePath(String value) Z=s.`?Z { r\$`e7d}! sFilePath = value; HrHtA] } +Os9}uKf \12y,fOJ 64t: public String getSFileName() ?P(U/DS8 { 8j}o\!H return sFileName; U;LX"'} } K1zH\wH D(#6H~QN% HEF\TH9 public void setSFileName(String value) QUWx\hqE { ? s[!JeUA sFileName = value; -AwkP } 'k/:3?R ];\XA;aOl} GB}!7W" public int getNSplitter() -V=,x3Zew { 6yd?xeD return nSplitter; afd.v$63 } Qb' Q4@. v;d3uunqv 7AQv4 public void setNSplitter(int nCount) 0](V@F"~ { *|6*jU nSplitter = nCount; Q$A;Fk}- } qE M,~:lTn } &<t`EI];)4 =h[;'v{ fHXz{,?/w /* M2LW[z **Utility.java LrdX^_,nt */ JsDT
package NetFox; T*92 o:^ lKV7IoJ&; Cw h[R public class Utility { s"x(i o^Qy71Uj R*VEeLx public Utility() Xw&vi\*m { =H?^G[ y 1aoKf F( F **/T } }[]1`2qD %9_jF" //线程睡眠 L\\'n ) public static void sleep(int nSecond) `Wp y6o { 5E}!TL$ try{ U|v@v@IBA Thread.sleep(nSecond); fDwqu.K } @m9dB P catch(Exception e) a@m
64l) { _vUId?9@+e e.printStackTrace (); U[NQ" } >z k6{kC } RU\MT'E>( 9a]h;r8,9z //日志 mg<S7+ public static void log(String sMsg) LcGG~P|ML { G1ED=N_# System.err.println(sMsg); +d=8 /3O% } a~F\2`Q nS]Ih 0(K O@-(fyG public static void log(int sMsg) OD).kP}s^ { i?6#>;f System.err.println(sMsg); 4']eJ==OH } 'y|p)r" } _p0G8 /,JL \b :@^T^ /* HlXEU$e
**TestMethod.java $pj;CoPm */ h:4F?'W package NetFox; .`/6[Zp }nMp.7b -x+K#T0Z public class TestMethod { @MfZP~T+ W4]jx] ~-#8j3 J; public TestMethod() 0>U7]wZKc { ///xx/weblogic60b2_win.exe +}Qq#^:_\ try{ [wM]w SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 7?qRz //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); <O4W!UVg SiteFileFetch fileFetch = new SiteFileFetch(bean); a+P^?N fileFetch.start(); !z"nJC } 3EA`]&d> catch(Exception e){e.printStackTrace ();} @^,9O92l |I s"ov !^qpV7./l } @@#(<[S\B *iXaQu T ;f9a0V s public static void main(String[] args) f|&,SI ? { D9higsN new TestMethod(); 2t:CK } HD;l1W) } H1hADn 点击下载更多相关资料
|