-
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
|
/* Ty*+?#` **SiteFileFetch.java OD?y */ ?Iag-g9#=m package NetFox; j#YVv c% import java.io.*; HaR x(p0 import java.net.*; }}Gkipp '"h}l` _<?z-K_;I public class SiteFileFetch extends Thread { 7_eV.'h 6H0aHCM V8Z@y&ny SiteInfoBean siteInfoBean = null; //文件信息Bean ZbH_h]1$D long[] nStartPos; //开始位置 V=Z%y$1Bc long[] nEndPos; //结束位置 iaQFVROu FileSplitterFetch[] fileSplitterFetch; //子线程对象 Z5`V\$ long nFileLength; //文件长度 QJI]@3
Y boolean bFirst = true; //是否第一次取文件 EEvi_Z932 boolean bStop = false; //停止标志 ]
^J File tmpFile; //文件下载的临时信息 !lp7}[k<y DataOutputStream output; //输出到文件的输出流 q35=_'\W g<:TsP'| //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) N1U.1~U public SiteFileFetch(SiteInfoBean bean) throws IOException i6O'UzD@T { rY$wC% siteInfoBean = bean; ppeF,Q //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); OK
z5;#S= tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); WY26Iq@C if(tmpFile.exists ()) SzG?m] { 2\F'So bFirst = false; sBNqg~HwB? read_nPos(); q}(f9 } 8A'SMJi else y4H/CH$% { upq3)t_ nStartPos = new long[bean.getNSplitter()]; 8rNf4]5@X( nEndPos = new long[bean.getNSplitter()]; -.Zy( } y-Lm^GW4 x@|10GC#: _J,*0~O$ {l\Ep=O vx } -:Q"aeC5 Wq<HsJd/ y"H(F,(N public void run() %-|$7?~ { G+m[W //获得文件长度 VY@`) //分割文件 %d
/]8uO //实例FileSplitterFetch .4y44: T //启动FileSplitterFetch线程 JYLAu4s6 //等待子线程返回 Ctk1\quz try{ ,,?XGx if(bFirst) M1*x47bN { &0+Ba[Z ^ nFileLength = getFileSize(); gGs"i]c if(nFileLength == -1) ifmX<'(9A { 9rM#w"E?< System.err.println("File Length is not known!"); _#
&_`bZH } %xC}#RDf else if(nFileLength == -2) 6f+@@=Xc { 8boiJku` System.err.println("File is not access!"); WGUd@lC~ } w ;:{ else *QoQ$alHH { ~Yre(8+M for(int i=0;i<nStartPos.length;i++) \3x+Z! { Seq
^o= nStartPos = (long)(i*(nFileLength/nStartPos.length)); ]DZ~"+LaG } 0 n|>/i for(int i=0;i<nEndPos.length-1;i++) [9yy<Z5 { 1=^| nEndPos = nStartPos[i+1]; #5X+.!L } b>' c
nEndPos[nEndPos.length-1] = nFileLength; hF1Lj=x } ]v_u2f' } `U>]*D68 -8SZ}J >Hd!o"I //启动子线程 hS^8/]E={ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; NQN?CBFQ for(int i=0;i<nStartPos.length;i++) zGP@!R`_ { 9zpOp-K6 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), f2ck=3 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), m-Se-aF nStartPos,nEndPos,i); 6-\M }xq? Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6dRvx;d fileSplitterFetch.start(); OZe`>Q6 } 1.nYT* // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), R!>SN0 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); d\tA1&k71 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", EEHTlqvR nEndPos = " + nFileLength); 3+!G9T! // fileSplitterFetch[nPos.length-1].start(); 0uI=8j W QeQ`pM x.
/WP~I //等待子线程结束 G6X5`eLQ //int count = 0; BD M"";u //是否结束while循环 F*y7 4j, boolean breakWhile = false; ~Vc`AcWP Z_Y gV:jc +Ecn while(!bStop) qh6Q#s>tH { |gfG\fL3V write_nPos(); | 8akp Utility.sleep(500); | breakWhile = true; \CYKj_c :7s2M B06W(y,3Q> for(int i=0;i<nStartPos.length;i++) cfHtUv { VzWH9%w if(!fileSplitterFetch.bDownOver) '.7ER { 2UTmQOm breakWhile = false; -LlS9[r0 break; k
jx<;##R8 } :79u2wSh } ]'0}fuV if(breakWhile) ?p>m;Aq break; "l B%"} z#d*Odc -s7a\H{~ //count++; zTw<9 Nf //if(count>4) .Z@ i z5 // siteStop(); Q|7m9~ } )p{,5"0u &HqBlRo |zy` ]p9 System.err.println("文件下载结束!"); z :A_ } caL\ d catch(Exception e){e.printStackTrace ();} $]J<^{v }
wKbU}29c 8,)<,g-/= 0*KL*Gn //获得文件长度 )vGxF}I3 public long getFileSize() O*>`md?MH { +[[^W;<.l int nFileLength = -1; R'^J#"[ try{ eo&G@zwN URL url = new URL(siteInfoBean.getSSiteURL()); zuJ@@\75 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); m=60a@o] httpConnection.setRequestProperty("User-Agent","NetFox"); H2yPVJ\Y)" 4UMOC_ r(g#3i4Q int responseCode=httpConnection.getResponseCode(); N^'(`"J s if(responseCode>=400) jN/snU2\0 { jT4
m(j processErrorCode(responseCode); pwA~?$B1 return -2; //-2 represent access is error =TA8]7S~U } 7LiyA< bj@f<f` /wi/i*;A String sHeader; )eH?3"" #`%V/ #YK FW3uq^ for(int i=1;;i++) D=M'g}l { mJsU7bD` //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 12l1u[TlS //Utility.log(in.readLine()); |)[&V3+| sHeader=httpConnection.getHeaderFieldKey(i); R?#.z# if(sHeader!=null) UTO$L|K { KBgFS%-W if(sHeader.equals("Content-Length")) 2|${2u`$&y { -+:t%A? nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); VwT&A9&{8 break; .RWq!Z=)3 } _D8:p>= } _TbvQY else RG_6&
A break; }5}#QHF } WdbHT|.Aj } [f]:hJi catch(IOException e){e.printStackTrace ();} !j9(%,PR catch(Exception e){e.printStackTrace ();} J$S*QCo Qa"4^s /mK]O7O7 Utility.log(nFileLength); A$l }&^1")2t pbGv\SF return nFileLength; tQ)l4Y 8 } ;7(vqm<V2~ A"IaFXB vg5fMH9ZZ //保存下载信息(文件指针位置) e4;h*IQK private void write_nPos() ;ao <{i? { 03!#99 try{ -9R.mG output = new DataOutputStream(new FileOutputStream(tmpFile)); m(CsO|pz output.writeInt(nStartPos.length); (w
Q,($@ for(int i=0;i<nStartPos.length;i++) ^j2z\yo { H:mcex // output.writeLong(nPos); u|(Iu}sE= output.writeLong(fileSplitterFetch.nStartPos); b\H,+|iK output.writeLong(fileSplitterFetch.nEndPos); 9jllW[`2F } \\Nt^j3qR output.close(); 0RN 7hpf&` } J5}?<Dd: catch(IOException e){e.printStackTrace ();} Z*.rv t catch(Exception e){e.printStackTrace ();} Q>TNzh } jV#1d8qm WP PDvB G9CL}=lJ, //读取保存的下载信息(文件指针位置) J!yK/*sO, private void read_nPos() M[L@ej { 8]WcW/1r ! try{ s 4n<k]d DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); i1!Y{ int nCount = input.readInt();
&0OH:P% nStartPos = new long[nCount]; B.#-@ nEndPos = new long[nCount]; |oR#j
` for(int i=0;i<nStartPos.length;i++) vhN6_XD { .GvZv> nStartPos = input.readLong(); {T3wOi nEndPos = input.readLong(); X @X`,/{X } iN2591S input.close(); ucUuhS5 } LftzW{>gI" catch(IOException e){e.printStackTrace ();} jK2gc^"t catch(Exception e){e.printStackTrace ();} y 48zsm{ } /Ur]U
w Rj-4K@a8#N #/)U0IR) private void processErrorCode(int nErrorCode) r<'B\.#tp> { %< Jj[F System.err.println("Error Code : " + nErrorCode); %/R[cj8 } /.(F\2+A FmQiy+.| 7+rroCr" //停止文件下载 $^W|@et{
] public void siteStop() >skl-f { t!0 IQ9\[* bStop = true; cd4HbSp for(int i=0;i<nStartPos.length;i++) )~#3A@ fileSplitterFetch.splitterStop(); 6`5DR~ $"3cN& xC2y/? } _w7yfZLv+ } h-\+# .YP //负责部分文件的抓取 *?o 'sTH **FileSplitterFetch.java ?*cCn-| */ `r0MQkk package NetFox; T!>sL=uf r`PD}6\ +SkfT4*U import java.io.*; ePTxuCf> import java.net.*; >vNE3S_ $Eo-58<q s2 $w>L public class FileSplitterFetch extends Thread { 2=X.$&a t5EYu* J n'SGR String sURL; //File URL u`u{\
xN9 long nStartPos; //File Snippet Start Position ^h"@OEga? long nEndPos; //File Snippet End Position c`7 dNx int nThreadID; //Thread's ID PsN_c[+ boolean bDownOver = false; //Downing is over VRUA<x boolean bStop = false; //Stop identical 3u9}z+q FileAccessI fileAccessI = null; //File Access interface l)Mi?B~N Oo9' C%"aj^u public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Om2w+yU { 66scBi_d this.sURL = sURL; ~FnY'F<35 this.nStartPos = nStart; ;V84Dy#b this.nEndPos = nEnd; e,l-}=5*P nThreadID = id; i_p-|I:hQ fileAccessI = new FileAccessI(sName,nStartPos);//定位 a!,X@5 } n{"a0O :71St' [f=Y*=u9, public void run() 1/c+ug!y { %ejq|i7 while(nStartPos < nEndPos && !bStop) K/8TwB?I { 4 Z&KR<2Z seZb;0 ^_uCSA'X try{ eqqnR.0 URL url = new URL(sURL); ME*A6/h HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); S4
s#EDs httpConnection.setRequestProperty("User-Agent","NetFox"); </_.+c [ String sProperty = "bytes="+nStartPos+"-"; 0Q[;{}W} httpConnection.setRequestProperty("RANGE",sProperty); }`]Et99Q5 Utility.log(sProperty); lDZ~ l_zTpyOZ BVS
SO's InputStream input = httpConnection.getInputStream(); >txeo17Ba\ //logResponseHead(httpConnection); 5e&;f %.;;itB ^t,haO4 byte[] b = new byte[1024]; V2$M`|E int nRead; '|G8yojz while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) [x
-<O:r=P { {N@Pk[! nStartPos += fileAccessI.write(b,0,nRead); G}@a]EGm //if(nThreadID == 1) Xi!e=5&Pa // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ~Sx\>wBlc } 6ck%M#v 6u{%jSA>D\ ]6,D9^{; Utility.log("Thread " + nThreadID + " is over!"); 3]kN9n{ bDownOver = true; >C`#4e?} //nPos = fileAccessI.write (b,0,nRead); bl#6B.*= } %Hu.FS5' catch(Exception e){e.printStackTrace ();} #j"GS/y" } 5i%\m } .d+zF,02Z xxOhGA) V9wL3* //打印回应的头信息 ,Uy;jk public void logResponseHead(HttpURLConnection con) 'Qg.D88 { &5QvUn for(int i=1;;i++) x|g2H.n { 8[:G/8VI String header=con.getHeaderFieldKey(i); Nop61zj if(header!=null) "_:6v64Gx //responseHeaders.put(header,httpConnection.getHeaderField(header)); yh.WTgcW Utility.log(header+" : "+con.getHeaderField(header)); 'a>D+A: else -0<ZN(?| break; )*aAkM } BqtN= } p:3w8#)MZ wcGv#J], n/YnISt public void splitterStop() ulfs Z: { lLI%J>b@ bStop = true; *pyC<4W } ?5wsgP^ JX`>N(K4\ BJ{?S{"6%G } oslj< QRwO v im
F,8 ' /* 6rlvSdB **FileAccess.java ]hZk#rp} *//文件访问(定位,写) GK#D R/OM package NetFox; D[{"]=- import java.io.*; VREDVLQT olK*uD'` <eZrb6a' public class FileAccessI implements Serializable{ Z
4c^6v upFe{M@ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 \jAI~|3 RandomAccessFile oSavedFile; ,C|aiSh0- long nPos; )))AxgM ?',Wn3A \\35}
9 public FileAccessI() throws IOException XnRm9% { ^MVOaV65 this("",0); o5G]|JM_ } P=X)Ktmv OXZx!h ScRK1 public FileAccessI(String sName,long nPos) throws IOException OK2\2&G { hPUZ{#;n oSavedFile = new RandomAccessFile(sName,"rw"); ?"@SxM~\ this.nPos = nPos; {ea*dX872: oSavedFile.seek(nPos); R S] N%`] } kD6Iz$tr 4v2JrC; 5Hs!s+ public synchronized int write(byte[] b,int nStart,int nLen) 1;v wreJ { }xY|z"& int n = -1; rw75(Lp{ try{ |C>\ku* oSavedFile.write(b,nStart,nLen); -o57"r^x n = nLen; 1U
='" } EW/N H&{ catch(IOException e) 'lmjZ{k { \!k\%j9 e.printStackTrace (); A@reIt } ?28)l
4 Ml In*0. {fMo#`9= return n; Z1wfy\9c8 } :)Da^V Me^L%%:@ =q[ynZ8O\w } 1"T&B0G3l B0^:nYko rK4
pYo
/* ?S.LGc **SiteInfoBean.java ~xc0Ky?8 */ S}K-\[i? package NetFox; 'Y/8gD~. .[Ny(X/]/} >Fc=F#tA9 public class SiteInfoBean { &+/$~@OK Zm#,Ike?# '@"A{mrE private String sSiteURL; //Site's URL <XzRRCYQ private String sFilePath; //Saved File's Path ='(;!3ZH private String sFileName; //Saved File's Name EpENhC0 private int nSplitter; //Count of Splited Downloading File vb`: Qd}h:U^ '(8}
<(% public SiteInfoBean() ryTtGx%a {//nSplitter的缺省值为5 l{V(Y$xp3 //default value of nSplitter is 5 V_KHVul this("","","",5); X$ A ]7t } =HMuAUa. YW"nPZNPy~ nDNK}O~' public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) 'f6!a5qC { O\ w-hk sSiteURL= sURL; bLUyZ3m! sFilePath = sPath; <O{G& sFileName = sName; 6lwWFR+k this.nSplitter = nSpiltter; VGOdJ|2]Wr UO-,A j*wW %gTY7LIe1z } I!.-}]k 7QaZ|\c A$TFa:O| public String getSSiteURL() Q|Nw @7$` { p(A[ah_ return sSiteURL; 8vUq8[[ } "p&4Sn3T2? Dj
w#{WR W;8}`k public void setSSiteURL(String value) 2F:X:f { z{qn|#} sSiteURL = value; Bc}e ??F } M2nZ,I=l 'A/f>W x^
sTGd public String getSFilePath() lsVg'k/Z! { ~%sNPKjA return sFilePath; ] .c$(. } qwo{34 W}k)5<C4v 1["IT.,f. public void setSFilePath(String value) 'he&h4fm { >P2QL>P sFilePath = value; &tw{d DD6 } dVBr-+ dV"Kx "-G&]YMl public String getSFileName() Tg v]30F) { wA6<BujD return sFileName; weIlWxy } )lVplAhZD smX&B,&@ 7] 17?s]t, public void setSFileName(String value) WQHlf0] { m_UzmWF sFileName = value; &-|(q!jm } a6g+"EcH#' (M%ZSF V +VHoYEW public int getNSplitter() `~LaiN. { }k6gO0z return nSplitter; 1VG7[#Zy } 3L;&MG= _\AT_Zmy </qli-fXB} public void setNSplitter(int nCount) J8hH#7WMS { -[7S. nSplitter = nCount; {^Q1b.= } >8DZj&j } AHTQF#U^ 0EUC8Ni '>UQsAvm /* 9K#U<Q0b' **Utility.java )7iYx {n */ @.KFWAm
package NetFox; fMZc_dsW9 g=kuM }_cX" s public class Utility { .T7S1C $HP wTVd){q`. -[>G@m:?e public Utility() {IQCA-AI { WSV% Oy3V ~`VD}{[,B v ce1'aW } 3HB(rTw
Ndqhc //线程睡眠 %;YERO! public static void sleep(int nSecond) :JG2xtn { |dk9/xdX try{ mV'^4by Thread.sleep(nSecond); RhumNP<M } {b26DKkQS catch(Exception e) tfq; KR { )R"deb=s e.printStackTrace (); OEj%cB! } *qL"&h5W } u[1'Ap T~-PT39E //日志 OwG:+T_ public static void log(String sMsg) |%7OI#t^ { G:?l;+P1 System.err.println(sMsg); "(SZ;y } -$5nqaK? 3']=w@~ O[ Lw #vHNf6 public static void log(int sMsg) aG/L'weR { aT%6d@g System.err.println(sMsg); bY7~b/ } ^1w*$5YI } @P}!mdH1 s4Y7x.- '5m`[S-IU /* 'Lv>!s 7 **TestMethod.java "r.eN_d */ ao.v]6a package NetFox; p+d?k"WN? k6W
[// ys$X!Ep public class TestMethod { <bxp/#6D +UC- *[[TDduh& public TestMethod() <)$b=z { ///xx/weblogic60b2_win.exe 7"Iagrgw try{ U4$CkTe2Y SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); t(?tPt4zp //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); 9<S};I; SiteFileFetch fileFetch = new SiteFileFetch(bean); ,mW-O!$3W fileFetch.start(); Zp*0%x!e } F
B7.b catch(Exception e){e.printStackTrace ();} 7Yd]#K{$ {pW(@4U M4(`o^n } # ~T
KC|G k->cqtG 4mJ[Wr\y public static void main(String[] args) p(]o#$ 6[ { aw8q}: new TestMethod(); ia}V8i } |qTS{qQh{L } 8q#Be1u<s2 点击下载更多相关资料
|