-
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
|
/* |@rf#,hTDp **SiteFileFetch.java !*^+7M */ EP4?+"Z package NetFox; WO69Wo\C import java.io.*; Yk{4 3yw import java.net.*; 1=_?Wg: ER`;0#3[9u 9-#=xE9'U public class SiteFileFetch extends Thread { t`6~ud> ]q#"8= f U<<GK70 SiteInfoBean siteInfoBean = null; //文件信息Bean "V:RKH` long[] nStartPos; //开始位置 }uD*\. long[] nEndPos; //结束位置 3DjX0Dx/l FileSplitterFetch[] fileSplitterFetch; //子线程对象 NHdNCHhA>- long nFileLength; //文件长度 KVC18"|f boolean bFirst = true; //是否第一次取文件 G #$r)S boolean bStop = false; //停止标志 7Or?$ File tmpFile; //文件下载的临时信息 )CH\]>-FO DataOutputStream output; //输出到文件的输出流 u~t% GIg j%S}
T)pX //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 7
A{R0@ public SiteFileFetch(SiteInfoBean bean) throws IOException MA=gCG/JD { w V v@
siteInfoBean = bean; F6{Q1DqI //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); uMFV^&ZF tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ~!fOl)F if(tmpFile.exists ()) %B>>J% { 1N.weey}W bFirst = false; K?S5C8 read_nPos(); i1qmFvksl } cW{ Bsr
else =VSUE
Pq { (Kkqyrb nStartPos = new long[bean.getNSplitter()]; |'k7 ;UW nEndPos = new long[bean.getNSplitter()]; UnTvot6~ } jJkc vC8d -C*UB mj& 4FQ#O* DRu#vC } K}dvXO@=|c .P!pC NW*$+u%/R public void run() XJ1<!tl { M;X}v#l|XI //获得文件长度 "V4ru&a //分割文件 h],l`lT1\ //实例FileSplitterFetch .gwT?O, //启动FileSplitterFetch线程 r[&/*~xL //等待子线程返回 V*+Z=Y' try{ 4^w`]m if(bFirst) )K0rPnYV { u3vw[k nFileLength = getFileSize(); =.q8*7UY if(nFileLength == -1) Tml>>O { JW=P}h System.err.println("File Length is not known!"); O&PrO+& } =(as{,j else if(nFileLength == -2) {r[g.@ { `yua?n System.err.println("File is not access!"); }FAO. } 0(az 80
p else II}3w#r4 { vt2A/9_Z% for(int i=0;i<nStartPos.length;i++) IaYy5Rw { `^CIOCK% nStartPos = (long)(i*(nFileLength/nStartPos.length)); sxn^1|O;m } \QMRuR. for(int i=0;i<nEndPos.length-1;i++) :LMLY<8>9 { `BKV/Xl nEndPos = nStartPos[i+1]; +m1y#|08 } p V`) nEndPos[nEndPos.length-1] = nFileLength; N:e5=;6s } L=-v>YL+ } 47^R aiwKkf`\ P4 dhP-t //启动子线程 ]c$)0O\O fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; M@78.lPS for(int i=0;i<nStartPos.length;i++) YhFd0A?] { S,2{^X fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), bZzB\FB~ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ]='zY3 nStartPos,nEndPos,i); 9/I|oh_
G Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); @vkO(o fileSplitterFetch.start(); HD{2nZT } tU>?j1 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), yM*f}S/
( siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); u|D|pRM-LT // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", gKWsmx![" nEndPos = " + nFileLength); EnnE@BJ" // fileSplitterFetch[nPos.length-1].start(); s^Rig[ X) xeq
UU"' //等待子线程结束 jxNnrIA //int count = 0; =^S1+B
MY- //是否结束while循环 FJ(}@U}57 boolean breakWhile = false; gj-MkeI) %[H|3 Yl0_?.1 z while(!bStop) ;7w4BJcq'] { &5o ln@YL write_nPos(); QFX )Nov]; Utility.sleep(500); aX{i breakWhile = true; B~t[Gy Rx%SeM2 2qxede for(int i=0;i<nStartPos.length;i++) [$AOu0J { c&a.<e3mL if(!fileSplitterFetch.bDownOver) '\I!RAZ { :FqHMN breakWhile = false; QC^#ns& break; EX9os } 5x/LHsr=m } yEB1gYJB if(breakWhile) l0-zu6iw break; sxFkpf_h .P5OUK Qy_! +q //count++; 0$A7"^] //if(count>4) ZI/Ia$O // siteStop(); bfl%yGkd/| } S@[B?sNj 5
i;n:&Y qGrUS_~q* System.err.println("文件下载结束!"); m6
@,J?X } ]p5]n*0X catch(Exception e){e.printStackTrace ();} 1'Y7h;\~\ } ipdGAG k2Y * w9Z,3J6r //获得文件长度 yON";|*\m public long getFileSize() H". [&VP5Z { CE;J`; int nFileLength = -1; |E5\_Z try{ Cr#Z. URL url = new URL(siteInfoBean.getSSiteURL()); Ia!B8$$'RP HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |h(05Kbk httpConnection.setRequestProperty("User-Agent","NetFox"); Vnvfu!>( I5mtr ;r.0=Uo9] int responseCode=httpConnection.getResponseCode(); ?4A$9H if(responseCode>=400) s !XJ { %|\Af>o4d processErrorCode(responseCode); V~!lY\ return -2; //-2 represent access is error $9}jU#Z|hd } 3Eu;_u_ %&Q9WMo Wt
1]9{$ String sHeader; n1J;)VyR SL ) ope wJ Qm7n-+ for(int i=1;;i++) |Ta-D++]' { k=M_2T' //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); S<nf"oy_K //Utility.log(in.readLine()); >pRC$'Usx sHeader=httpConnection.getHeaderFieldKey(i); v_L2>Pa. if(sHeader!=null) {;-wXzv` { wJMk%N~R: if(sHeader.equals("Content-Length")) 3<R8_p { T;`2t; nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 3GVS-? break; V N<omi+4 } ,6AnuA } 0Q4i<4 XW else :pXY/Pa break; W:hg*0z-* } Y6:b } Q@0Zh,l catch(IOException e){e.printStackTrace ();} T:!f_mu| catch(Exception e){e.printStackTrace ();} oGvk,mh"( |9Pi*)E b9RJ>K Utility.log(nFileLength); )1, U~+JFU (\M#Ay t) *F;W 1TF return nFileLength; <19A= } NE5H\ L"Dos + cJLAP%.L //保存下载信息(文件指针位置) !=bGU= ^
private void write_nPos() u?7^+z { h-+vNhH try{ 8.ej65r* output = new DataOutputStream(new FileOutputStream(tmpFile)); E]dc4US output.writeInt(nStartPos.length); k3CHv =U{ for(int i=0;i<nStartPos.length;i++) }Yargj_Gn { S8k<}5 // output.writeLong(nPos); )o`[wq output.writeLong(fileSplitterFetch.nStartPos);
-^ R?O output.writeLong(fileSplitterFetch.nEndPos); T%]@R4z#q } 9}A\BhtiM output.close(); '_B;e=v` } MREB catch(IOException e){e.printStackTrace ();} 4QBPN@~t catch(Exception e){e.printStackTrace ();} a^g}Z7D'T } wJF(&P eZ8DW6 l*
aJLc&o 8Yg //读取保存的下载信息(文件指针位置) I3;03X<2 private void read_nPos() 7* R
%zJ { zK>}x= try{ IC:>60A,] DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ib%'{?Q. int nCount = input.readInt(); GJIZu&C nStartPos = new long[nCount]; Vl/fkd,Z nEndPos = new long[nCount]; C;0VR for(int i=0;i<nStartPos.length;i++) B|ctauJ { \ 0/m$V. nStartPos = input.readLong(); hMyN$7Z nEndPos = input.readLong(); i
hcSS Um } }CM#jN?( input.close(); ,wZq~;2 } :%<'('S| catch(IOException e){e.printStackTrace ();} 1h3`y catch(Exception e){e.printStackTrace ();} <9]J/w+ } R>hL.+l. Ys]cJ] M^{=& private void processErrorCode(int nErrorCode) 2oo\ SmO] { Nz>xilU' System.err.println("Error Code : " + nErrorCode); C9 j{:& } >{[ =g |5VXW5 5a|{ytP //停止文件下载 Uf9L*Z'6il public void siteStop() Kf# iF* { <6&Z5mpm$w bStop = true; nd"$gi for(int i=0;i<nStartPos.length;i++) JC#5CCz fileSplitterFetch.splitterStop(); hcoZ5!LvT M'JCT'(X KGGJ\r6 } p\Fxt1Y@X } S@Aw1i p //负责部分文件的抓取 gOr%N!5 **FileSplitterFetch.java ]IH1_?HgP7 */ p@ U[fv8u package NetFox; j!"5,~ R`M@;9I.@ F{Oaxn import java.io.*; erOj(ce import java.net.*; dEkAUH EY0,Q { h-\Ov{~ public class FileSplitterFetch extends Thread { vj|#M/3> >z73uKA( (9b%'@A@m String sURL; //File URL Js^(mRv= long nStartPos; //File Snippet Start Position +Jm[IN long nEndPos; //File Snippet End Position "q
KVGd int nThreadID; //Thread's ID 5> !N)pA boolean bDownOver = false; //Downing is over v6ei47- boolean bStop = false; //Stop identical `3*QKi$ FileAccessI fileAccessI = null; //File Access interface F`1J&S;C lYmxd8 @|{8/sOq public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException (gIFuOGi> { Jp=
)L this.sURL = sURL; FiSx"o this.nStartPos = nStart; mY]o_\` this.nEndPos = nEnd; 7~);,#[ky nThreadID = id; 5}a.< fileAccessI = new FileAccessI(sName,nStartPos);//定位 K"ly\$F }
WJ,? 5# 7a=ul: s>%.bAxc public void run() t{,e{oZx { (}s& 84! while(nStartPos < nEndPos && !bStop) 0sH~H[ap { {$>.I 6n~)R 5F!i%{XQvm try{ 4*inN~cU URL url = new URL(sURL); {R"mvB` HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^=8/I w httpConnection.setRequestProperty("User-Agent","NetFox"); -2'+GO7G String sProperty = "bytes="+nStartPos+"-"; %Y,Ru)5} httpConnection.setRequestProperty("RANGE",sProperty); PXML1.r$Q Utility.log(sProperty);
+hX= |kD69
}sG nM *}VI InputStream input = httpConnection.getInputStream(); AMASh* //logResponseHead(httpConnection); iP@FXJJ [WV&Y,E mg" _3].j byte[] b = new byte[1024]; `jyyRwSoe int nRead; 0|C !n+OK while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) g<7Aln}Nl\ { R0mkEM nStartPos += fileAccessI.write(b,0,nRead); ";7/8(LBZ //if(nThreadID == 1) X|D-[|P // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6uKP
BL@, } h<bhH=6~ u~>G8y)k9O G/#m.=t Utility.log("Thread " + nThreadID + " is over!"); q8n@fi6 bDownOver = true; n5;@}Rai //nPos = fileAccessI.write (b,0,nRead); U| ?68B3 } y%x:~. catch(Exception e){e.printStackTrace ();} W*DKpJy } s
{^wr6B } 2-jXj9kp` KN"u PW &5XEjY>@ //打印回应的头信息 4jGN:*kZ public void logResponseHead(HttpURLConnection con) 587;2 { 5#s],h for(int i=1;;i++) s:_a.4&Y { U_;="y String header=con.getHeaderFieldKey(i); vVIND if(header!=null) 0pG +yec //responseHeaders.put(header,httpConnection.getHeaderField(header)); )=`DEbT Utility.log(header+" : "+con.getHeaderField(header));
U@CAQ? else ofw&?Sk0 break; H_Va$}8z } kjB'WzZ8 } 9Kgyt KUK.;gG*Z &/-MUKN public void splitterStop() ,zr,>^v { jSH.e? bStop = true; H9i7y,[* } !]Qk?T~9- ;\6@s3 J/:U,01 } S=.%aB V6'u\Ch| S'W,AkT /* cruBJZr* **FileAccess.java aXG|IN5 *m *//文件访问(定位,写) HFTeG4R package NetFox; qY'+@^<U; import java.io.*; !8T04988j ,4`Vl<6 _ `O",Ff public class FileAccessI implements Serializable{ 6R^32VeK($ `LLmdm 6i //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 a5saN5)H RandomAccessFile oSavedFile; 5c(g7N long nPos; (aC=,5N F?"Gln~; %'_:#!9 public FileAccessI() throws IOException KK1?!7 { =+Odu this("",0); AXte&l=M } )=X g *PV7s Y?7GFkIP$ public FileAccessI(String sName,long nPos) throws IOException 'J-a2oiM( { MzgP@tB oSavedFile = new RandomAccessFile(sName,"rw"); q5hE S this.nPos = nPos; tKcC{ oSavedFile.seek(nPos); MUv#8{+F'/ } ]+m2pEO Vy[xu$y 8#tuB8> public synchronized int write(byte[] b,int nStart,int nLen) 8Dtpb7\o { ,Eh]Zv1AE int n = -1; SCe$v76p# try{ @Lf&[_ oSavedFile.write(b,nStart,nLen); vqQ)Pu?T n = nLen; ,%N[FZ`| } \}W3\To_ catch(IOException e) 7RBEEE`) { j$XaO%y) e.printStackTrace (); D}X6I#U'/ } &0y`Gt =Hn--DEMg cuumQQ return n; %Cqp88] } eD2eDxN2 BY[7`@ @R%qP>_ } IzUpkwN -P|claO0 4lc|~Fj++ /* ^xNzppz`]C **SiteInfoBean.java !03JA 9lo */ Dt(D5A package NetFox; ];6955I! [)jNy_4 /FC
HF#yK public class SiteInfoBean { hLuv ;n*|AL7( |94o P>d private String sSiteURL; //Site's URL Nb
!i_@m%s private String sFilePath; //Saved File's Path 0&I*)Zt9x private String sFileName; //Saved File's Name X"q[rsB private int nSplitter; //Count of Splited Downloading File 52Lp_M >lQa"F= 6s~B2t:Y public SiteInfoBean() : -#w {//nSplitter的缺省值为5 l-v m`-_# //default value of nSplitter is 5 uI?Z_ this("","","",5); zng.(]U/?H } 9DM,,h<` >2pxl(i 6.KEe^[- public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) #|Lsi`]+ { M@h"FuX: sSiteURL= sURL; T!y 9v5 sFilePath = sPath; Lhux~,EH sFileName = sName; _L~ 3h this.nSplitter = nSpiltter; bsU$$; KU(BY}/ ^ E%D .a=UX, } inO;Uwlv `4xQ#K.- p~8 O6h@J public String getSSiteURL() ^Ld5< { @M<qz\
[ return sSiteURL; X,3\c: } !\1)?&y9j [[<TW} 8+gp"!E public void setSSiteURL(String value) D>W&#A8&y { `3VI9GmQ sSiteURL = value; >I~Q[ } #\Y`? P,)D0i d@{12hq public String getSFilePath() l]wLQqoO { ,qp8Rg|3j return sFilePath; D-C]0Jf3 } ;4b=/1M' \ Xh
C 0<@['W}G public void setSFilePath(String value) \7qj hA@ { vI(LIfe; sFilePath = value; 1I69O6" } g7hI9(8+ A. tGr(r %SIll public String getSFileName() UTu~"uCR { 5ta;C G return sFileName; T>(X`( } oVHe<zE. j96}E/gF M"s:*c_6 public void setSFileName(String value)
C&qo$C { :PN%'~}n sFileName = value; rWNe&gFM } DN=W2MEfc af@a / ! })Y9oZc8 public int getNSplitter() ESoC7d&.K{ { 9fbbJ"I+ return nSplitter; sDg1nKw( } ZEDvY=@a 5p~5-_JX }[!=O+gO public void setNSplitter(int nCount) Yh!k uS#< { ;Q vQ fV4 nSplitter = nCount; J^#g?RHN>m } \/ri|fm6l# } @ls/3`E/5E X8*~Cf73u T<Y*();Zo /* L{IMZ+IB2| **Utility.java MRo_An+ */ #=)>,6Zw package NetFox; 5$:9nPAH g&w~eWpk f0^s<:* public class Utility { KfVsnL_ =c,7uB 32aI0CT public Utility() SnUR?k1 { -:r<sv$ y?r`[{L(lA w1zMY:9 } Ug0c0z!b &|'yqzS3 //线程睡眠 WB'1_a public static void sleep(int nSecond) ydY(*] { HWFTI /] try{ 6/g
82kqpk Thread.sleep(nSecond); 54WX#/<Yik } 2)$-L'YS catch(Exception e) FaWc:GsfB { byt$Wqdl e.printStackTrace (); 4IY|< } ->IZZ5G< } lJfk4 -;M NB^Al/V@ //日志 /|&4&$ public static void log(String sMsg) bxO/FrwTj{ { BL>~~ System.err.println(sMsg); iC! 6g|]X } @U?&1.\ WO!OaC?+B, &'Nzw2 public static void log(int sMsg) {gu3KV { E^{!B]/oP System.err.println(sMsg); |9FrVO$M } f9y+-GhaD } !L9]nO 'BL e9Gu`$K Us#/#-hJ /* ]D,_<Kk **TestMethod.java "+&pd!\ */ tfm3IX package NetFox; ?5};ONjN Tu}EAr NZ8X@|N public class TestMethod { hG<[F@d K(lVAKiP] Q*'OY~ public TestMethod() w<]-~`K { ///xx/weblogic60b2_win.exe <ycR/X try{ b9T6JS j SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); d9jD?HgM( //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); GCw4sb4~w SiteFileFetch fileFetch = new SiteFileFetch(bean); !OPHS^L fileFetch.start(); OfA+|xT& } &~B8~U4% catch(Exception e){e.printStackTrace ();} \3K7)o^ \4<|QE &0G9v } 2w+4B4 ~FXq%-J R/E6n &R public static void main(String[] args) '?_~{\9< { xA2I+r*o new TestMethod(); DaGny0|BB } =^{MyR7 } {=gJGP/}_ 点击下载更多相关资料
|