-
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
|
/* x bsk **SiteFileFetch.java YaWZOuxm */ 2c
Pd$j package NetFox; @Z fQ)q\ import java.io.*; 7
B< import java.net.*; 7tEkQZMDI ."u-5r<O _3_kvs public class SiteFileFetch extends Thread { Uh9p,AV KO ~_ >3v
j<v}m SiteInfoBean siteInfoBean = null; //文件信息Bean ;nDCyn4i] long[] nStartPos; //开始位置 C}= *%S long[] nEndPos; //结束位置 R;6$lO8C& FileSplitterFetch[] fileSplitterFetch; //子线程对象 S>!
YBzm&X long nFileLength; //文件长度 %O=U|tuc$ boolean bFirst = true; //是否第一次取文件 G(n
e8L8 boolean bStop = false; //停止标志 6w )mo)<X File tmpFile; //文件下载的临时信息 3.c0PRZ DataOutputStream output; //输出到文件的输出流 nNN~Z'bG e)#O-y //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) </.9QV public SiteFileFetch(SiteInfoBean bean) throws IOException h}T+M BA% { ) Ekd siteInfoBean = bean; ^~iFG+g5 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Zs$Qo->F tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); W$I^Ej}>$ if(tmpFile.exists ()) #jc+2F,+{ { !zu YO3: bFirst = false; N FVr$?P read_nPos(); 3y[uH' } efc<lSUR else .IO_&^ { y4V~fg; nStartPos = new long[bean.getNSplitter()]; 8RA]h?$$J nEndPos = new long[bean.getNSplitter()]; n]15 ~GO. } ];3]/b)& <wIz8V t#fbagTON s_/a1o } K4r"Q*h )&nfV5@" /K@_O\+;Q public void run() _SW_I{fjr { 6>fQe8Y //获得文件长度 y7x&/2 //分割文件 $N}nO:`t //实例FileSplitterFetch DX*eN"z[ //启动FileSplitterFetch线程 ! H^,p$`[i //等待子线程返回 <hJ%]] try{ 2 SJN;A~} if(bFirst) &=KNKE` { r Ljb'\<* nFileLength = getFileSize(); k3 YDnMRA9 if(nFileLength == -1) *ommU(r8 { {mkD{2)KQ System.err.println("File Length is not known!"); "-WEUz } %u)niY-g else if(nFileLength == -2) !"G|y4O { cLZaQsS% System.err.println("File is not access!"); l2&s4ERqSm } T>!Y-e.q else daX$=n { bg =<) s for(int i=0;i<nStartPos.length;i++) MnQ4,+ji- { k|r+/gIV nStartPos = (long)(i*(nFileLength/nStartPos.length)); fFSQLtm?E } Z [aKic for(int i=0;i<nEndPos.length-1;i++) pZ IDGy=~ { 3YFbT
Z nEndPos = nStartPos[i+1]; ^z _m<&r } # },4m nEndPos[nEndPos.length-1] = nFileLength; kT=KxS{ } 1luRTI8^ } }Qqi013E L &>YdX$8x ;PA^.RB //启动子线程 [yEH!7 fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; (FY<%.Pa for(int i=0;i<nStartPos.length;i++) R9!GDKts% { @[s+5_9nk fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Yp;6.\Z8[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Z
ZMz0^V nStartPos,nEndPos,i); I?z*.yA* Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); GY3g`M
fileSplitterFetch.start(); ZQVr]/W^r } o)M=; ! // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /`2t$71) siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); |)4aIa // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", pE~>k: nEndPos = " + nFileLength); ,WA[HwY- // fileSplitterFetch[nPos.length-1].start(); hd'JXKMy WlF}R\N! T\
cJn>kCn //等待子线程结束 -!ARVf * //int count = 0; Q&@~<!t //是否结束while循环 PlX6,3F boolean breakWhile = false; Wifr%&t{J 2H]~X9,z2 HTa]T' while(!bStop) `yvH0B - { 3lw8%QD> write_nPos(); Vt[Kr Utility.sleep(500); ,t!K? Y breakWhile = true; :mI[fQ aOOkC&% VOa7qnh4:[ for(int i=0;i<nStartPos.length;i++) (9A`[TRwi { k/`WfSM\. if(!fileSplitterFetch.bDownOver) |#Q4e51H { - /
tzt breakWhile = false; PIthv[F break; ]rY3bG'& } SBbPO5^]( } 4_i6qu(4 if(breakWhile) O\5q_>] break; pn._u`xMV (UGmbRf& p&O-]o8 //count++; Y;B#_}yF //if(count>4) :VvJx] // siteStop(); hj*Fn } N =0R6{' ss4<s
5:y .o"FT~}z System.err.println("文件下载结束!"); wvuh } )h&*b9[B= catch(Exception e){e.printStackTrace ();} mz<wYV* } ZBf9Upg J nzI-
y f|cF[&wo //获得文件长度 sO;]l"{< public long getFileSize() 5"cYZvGkJ { OBBEsD/bc int nFileLength = -1; C\d5t4s try{ ~p'DPg4 URL url = new URL(siteInfoBean.getSSiteURL()); J]=2] oI2 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); w*-1*XNA httpConnection.setRequestProperty("User-Agent","NetFox"); puPYM" %J
'RO ="Edt+a)t int responseCode=httpConnection.getResponseCode(); DdG*eKC if(responseCode>=400) ROfr { w*3DIVlxL processErrorCode(responseCode); cz6\qSh\, return -2; //-2 represent access is error I$#)k^Q } /[|ODfY 4[$D3,A @U;U0
String sHeader; ~?x
`f+ RE?j)$y?` 4t<l9Ilp for(int i=1;;i++) AWqc?K@ { *\5o0~~8J //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); U}]uPvu //Utility.log(in.readLine()); q&y9(ZvI sHeader=httpConnection.getHeaderFieldKey(i); 0u7\*Iy if(sHeader!=null) :: 2pDtMS { )b_
GKA
` if(sHeader.equals("Content-Length")) ::Nhs/B/ { 7Hm/g nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); `Y5{opG7- break; a|s64+ } HN j6Iw } 3|FZ!8D else z$q:Yg break; $kM8E@x2 } uSRvc0R\ } 'J=knjAT catch(IOException e){e.printStackTrace ();} CaV>\E) catch(Exception e){e.printStackTrace ();} .!&S{;Vv?W F~Z~OqCS
?V>\9?zb Utility.log(nFileLength); Wz^M*=, DwLl}{r' sJHN4 return nFileLength; e[8AdE } w'-J24>= EEJsNF J% t[{ //保存下载信息(文件指针位置)
, 7kS#`P private void write_nPos() \;%DDw { UFED*al# try{ !UV/p"CfX output = new DataOutputStream(new FileOutputStream(tmpFile)); )&$Zt( output.writeInt(nStartPos.length); "
~X;u8m for(int i=0;i<nStartPos.length;i++) vMQvq9T} { > 10pk // output.writeLong(nPos); .vbUv3NI output.writeLong(fileSplitterFetch.nStartPos); p7YfOUo
k output.writeLong(fileSplitterFetch.nEndPos); 51\N+ } ]("5O V5 output.close(); Q6r!=yOEY } OGjeE4 catch(IOException e){e.printStackTrace ();} )ZI9n7 catch(Exception e){e.printStackTrace ();} r,` 5 9 } @Q=P6Rz
{S L< gp "e iQI$Y]Y7 //读取保存的下载信息(文件指针位置) q|[P[7z private void read_nPos() %](H?'H {
_%`<V!RT\ try{ o=,q4;R' DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 5>e3srKu int nCount = input.readInt(); Dn#GoDMJ[ nStartPos = new long[nCount]; Fk 5; nEndPos = new long[nCount]; U/|H%b for(int i=0;i<nStartPos.length;i++) u7Xr!d+wR { #78P_{#! nStartPos = input.readLong(); s|1BqoE nEndPos = input.readLong(); k$hNibpkt } Nd"Rt input.close(); gmY*}d`
'f } p=U/l#xO catch(IOException e){e.printStackTrace ();} VS:UVe catch(Exception e){e.printStackTrace ();} cVR3_e{&H } =>0+BD #]@<YKoV{ <Rl:=(]i~ private void processErrorCode(int nErrorCode) V`n;W6Q17 { -UPlQL System.err.println("Error Code : " + nErrorCode); 3]X9 z } Jhyb{i8RR l{{wrU`
,a$?KX
//停止文件下载 kUdl2["MZ public void siteStop() A!K/92[#@ { 5G\CT&cQR bStop = true; (j%d{y4 for(int i=0;i<nStartPos.length;i++) wlh V!a0> fileSplitterFetch.splitterStop(); Tu'/XUs;k XQ{G) UI*^$7z1 + }
1Ugyjjlz } 4RH'GnLa //负责部分文件的抓取 eDm~B(G$ **FileSplitterFetch.java Z(8'ki */ =!G3YZ package NetFox; >tq,F"2amC @R|Gz/ CTbz?Kn import java.io.*; %("Bq"Q8 import java.net.*; NjCdkT&g Y]5\%JR zKi5e+\ public class FileSplitterFetch extends Thread { ;9{x"" Kzs]+Cl x=>+.'K String sURL; //File URL ">n38:?R long nStartPos; //File Snippet Start Position [U]ouh) long nEndPos; //File Snippet End Position nC3U%*l int nThreadID; //Thread's ID uh~/ybR boolean bDownOver = false; //Downing is over P~)ndaQ boolean bStop = false; //Stop identical <&?gpRK FileAccessI fileAccessI = null; //File Access interface Y}bJN%M `>1"v9eF idC4yH42 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 2 NgEzY5 { LWB"}#vt this.sURL = sURL; M1MpR+7S this.nStartPos = nStart; 5pBQ~m3 this.nEndPos = nEnd; <(]e/} nThreadID = id; w>IYrSaa> fileAccessI = new FileAccessI(sName,nStartPos);//定位 FT1h\K|a } b[^=GF>e 8QeM6;^/5 gz K"'4` public void run() *nB fF{y { m[7i<'+S while(nStartPos < nEndPos && !bStop) IeqJ>t: { qNhQ2x\ -$(,&qyk )
#/@Jo2F try{ |k wkikGQS URL url = new URL(sURL); qzVmsxBNP HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); y&0&K4aa httpConnection.setRequestProperty("User-Agent","NetFox"); uA?_\z? String sProperty = "bytes="+nStartPos+"-"; #rZk&q httpConnection.setRequestProperty("RANGE",sProperty); Tr1#=&N0 Utility.log(sProperty); yqF$J"=| OXC7
m JTw'ecFev InputStream input = httpConnection.getInputStream(); zX-6]j; //logResponseHead(httpConnection); S8O^^jJq; .wrNRU7s =a`l1zn8= byte[] b = new byte[1024]; g8yWFqE!T int nRead; `A.!<bO)] while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) <}RU37,W { 5#zwdoQ nStartPos += fileAccessI.write(b,0,nRead); g1Q^x/ //if(nThreadID == 1) J?XEF@?'G // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Ve,_;<F]S } 1NO<K` ExDH@Lb Jy'ge4]3 Utility.log("Thread " + nThreadID + " is over!"); H!Y`?Rc bDownOver = true; *'+OA6 //nPos = fileAccessI.write (b,0,nRead); Gd)@PWK } BJ3st catch(Exception e){e.printStackTrace ();} 29K09 0f } D?rQQxb } R>"E Xq "
}@QL` z.g'8#@ //打印回应的头信息 :\Z;FA@g(g public void logResponseHead(HttpURLConnection con) .`!|^h%0 { C#X0Cn0ln for(int i=1;;i++) A2z%zMlZc { B.&ly/d String header=con.getHeaderFieldKey(i); W:uIG-y~ if(header!=null) v7O&9a; //responseHeaders.put(header,httpConnection.getHeaderField(header)); $;%-<*Co Utility.log(header+" : "+con.getHeaderField(header)); Ga-AhP else "Hmo`E B0 break; NDhHU#Q9 } WigC' } >JFAE5tj&2 ^f{+p*i}: J@(=#z8xS public void splitterStop() nX<!n\J T { dx}()i\@ bStop = true; 2pH2s\r<UJ } 3Z NYR' ):jKsP
, GIsXv 2 } e`'O! }8GCOY j"HB[N /* VR2BdfKU, **FileAccess.java ,\4@Ao *//文件访问(定位,写) \TkBV?W package NetFox; m!a<\0^ import java.io.*; W @Y$!V< >k<.bEx(A b7E= u0 public class FileAccessI implements Serializable{ ;+>-uPT/1 bLUn>ch //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 y&-wb'==p RandomAccessFile oSavedFile; 3Ew-Ia%A long nPos; _}:9ic]e ;hA>?o_i( X3tpW`alo public FileAccessI() throws IOException E)H:
L- { (Gf1#,/3~ this("",0); vg &Dr } 5rRYv~+ K{B[(]( k {_X%H/ public FileAccessI(String sName,long nPos) throws IOException #WwQ^6ESc { }o0R`15dA oSavedFile = new RandomAccessFile(sName,"rw"); j#$ R. this.nPos = nPos; tH,}_Bp oSavedFile.seek(nPos); zGHP{a1O7 } KFCrJ) U=\ZeYK. dqwAQ-x public synchronized int write(byte[] b,int nStart,int nLen) c}kZx1 { SL zL/5s int n = -1; r0379 _ try{ xgn@1.}G oSavedFile.write(b,nStart,nLen); 6Db1mvSe n = nLen; $YSAD\a< } (zIP@ H catch(IOException e) [wWip1OR { `of 5h*k e.printStackTrace (); =hxj B*") } ~McmlJzJG dnTB$8& xQ\/6| return n; TCYjj:/ } 3%{A"^S=} 6+u}'mSj8 N3
.!E| } OJPxV~y Q*&>Ui[& ~B;kFdcVXn /* )XV|D **SiteInfoBean.java |Wd]:ijJ */ izy7.(.a package NetFox; h[b5"Uqj bO]^TRaiJ u&yAMWl public class SiteInfoBean { qgg/_H:;w nd*9vxM 23?\jw3w private String sSiteURL; //Site's URL T4dLuJl private String sFilePath; //Saved File's Path k FE2Vv4. private String sFileName; //Saved File's Name uCO-f<b private int nSplitter; //Count of Splited Downloading File <aR9,: u>o<ua
p s\y+ xa: public SiteInfoBean() Z
6KM%R {//nSplitter的缺省值为5 GjN/8>/ //default value of nSplitter is 5 R_ymTB}<t( this("","","",5); ^
cpQ*Fz } s kC* #Jp_y| !2R~/Rg public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Zz}Wg@&
{ *@/1]W sSiteURL= sURL; <wWZ]P2] sFilePath = sPath; nt.A X sFileName = sName; &?UIe] this.nSplitter = nSpiltter; -x)Oo` Xu\FcQ{ 12qX[39/ } lx_jy>$}r vVB8zS~l
, {:BAh5e| public String getSSiteURL() Y'7f"W { lVF}G[B return sSiteURL; "#1KO1@G } V'?bZcRr~ *`$Y!uzG:\ ]S;^QZ public void setSSiteURL(String value) dS]TTU1 { ,l/~epx4v) sSiteURL = value; hG51jVYtw } Lc 4\i YHBH9E/B j_H"m R public String getSFilePath() g(Q)fw { q2 K@i*s return sFilePath; dd1CuOd6(1 } KG9h
rT Y~z3fd Ua0fs|t1v public void setSFilePath(String value) '-C%?*ku { vF
yl,S5A sFilePath = value; c1 aCN } "Kky|(EQ$$ Nfe v"wxHro public String getSFileName() &j=FxF9o { n7-|\p!xP6 return sFileName; z
H$^.1 } )H=}bqn 8T"C] yF2|w=! public void setSFileName(String value) tg =ClZ- { Y' K+O sFileName = value; t8SvU } ]^aOYtKX /zxLnT;
5 }nh!dVA8lh public int getNSplitter() UQ]WBS\ { 6zv-nMZc return nSplitter; 6&,n\EXF } me-Tv7WL .Uk ejx A"|y< public void setNSplitter(int nCount) l
Ozi| { zgre&BV0q nSplitter = nCount; obA}SF } Cka&b } bu[PQsT 0zJT_H+ 0X \OQ; /* +c4-7/kE **Utility.java q8&2M */ j"G1D-S: package NetFox; 2cv!85 g-G;8x'n R(YhVW_l public class Utility { ":=\ci]e% RNa59b (41BUX public Utility() bEO\oS { B$ty`/{w,B i/Zv@GF vbFi#|EU } yC%zX}5 w=e_@^Fkx //线程睡眠 w5/`_m! public static void sleep(int nSecond) t<8vgdD { Oz8"s4Y7 try{ Z8vMVo Thread.sleep(nSecond); Ug :3)q[O } _FpZc?= catch(Exception e) 8+}yf.` { RbOEXH*] e.printStackTrace (); cV;<!f+ } VTS7K2lBvX } y$i^C: N 0)<\jo1 F //日志 `O5 Hzb(} public static void log(String sMsg) p2m@0ou { ?E>(zV1D/ System.err.println(sMsg); C8^h`B9z&I } FYwMmb
~3 kmNa),`{s ^Om0~)"q public static void log(int sMsg) \xCI8 *W { ?=u/&3Cw System.err.println(sMsg); JAt$WW{ } Rs$fNW@P } e6G=Bq$ 1gK<dg c>SFttbU /* 5Z8Zb. **TestMethod.java +qPpPjG; */ ,\){-H/n package NetFox; J#1-Le8@ C0f<xhp?j Bqcih$`BVU public class TestMethod { cd&^ vQL8 ON,sN z (1zth public TestMethod() #'5C*RO { ///xx/weblogic60b2_win.exe 9+i rf^D`O try{ OBnf5*eJ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); !xE/ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); X
jPPgI SiteFileFetch fileFetch = new SiteFileFetch(bean); J\@ r~x5G fileFetch.start(); \*a7o GyH> } E=*82Y=B catch(Exception e){e.printStackTrace ();} xX !`0T7Y z_i(o kv!QO^;^Y } w"PnN f6of8BOg b(E}W2-t public static void main(String[] args) ^uWPbW&/q { Os90fR new TestMethod(); kA .U2 } (&Kv]-- } hSN{jl{L` 点击下载更多相关资料
|