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/* v$`AN4)} **SiteFileFetch.java *<**rY* */ AjQ^
{P package NetFox; EPz$`#Sh" import java.io.*; /?; 8F import java.net.*; _S(]/d(c ?q%)8 E +c699j;[ public class SiteFileFetch extends Thread { s)e;
c<(/ 3-Q*umh `aS9o]t SiteInfoBean siteInfoBean = null; //文件信息Bean ?6bk&"T? long[] nStartPos; //开始位置 'CH|w~E long[] nEndPos; //结束位置 rX%qWhiEJ FileSplitterFetch[] fileSplitterFetch; //子线程对象 j;O{Hvvz long nFileLength; //文件长度 ='7n boolean bFirst = true; //是否第一次取文件 USnKj_e boolean bStop = false; //停止标志 .bm#|X)RO File tmpFile; //文件下载的临时信息 <9S?wju4W' DataOutputStream output; //输出到文件的输出流 U/B1/96lJ $rySz7NI //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ^;2dZgJ4^ public SiteFileFetch(SiteInfoBean bean) throws IOException G~{xTpL { X^#.4:>. siteInfoBean = bean; $FgpFxz;
//tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); .bOueB- tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Cl;B%5yl if(tmpFile.exists ()) dJ#.
m { !Cj1:P bFirst = false; !P, 9Sg&5) read_nPos(); <:u)C; } EX[X|"r else >a]4} { sBuVm<H nStartPos = new long[bean.getNSplitter()]; g#V3u=I8~ nEndPos = new long[bean.getNSplitter()]; d0b--v/ } xw5E!]~D >?,arER ?wps_XU 4[]R?lL } U4_< *HmL8c O,_2djd public void run() %8kbX { ,>%AEN6N2 //获得文件长度 hGH{Xp[mW //分割文件 <?P UF, //实例FileSplitterFetch xXK7i\ny //启动FileSplitterFetch线程 HnVUG4yZTD //等待子线程返回 5FHpJlFK, try{ $2F*p#l(<Z if(bFirst) :&dY1.<N+ { :y'D] ,_ nFileLength = getFileSize(); _tQ=ASe0 if(nFileLength == -1) {Gs&u>>R"^ { 4yC{BRbi System.err.println("File Length is not known!"); d8g3hyI5\ } Q=yQEh|Y else if(nFileLength == -2) Dd*T5A? { BNg\;2r System.err.println("File is not access!"); }0uSm%," } Y}"|J ~ else `"m"qUd { gv;=Yhw.c for(int i=0;i<nStartPos.length;i++) J%xp1/=2 { .9WUp> nStartPos = (long)(i*(nFileLength/nStartPos.length)); M6!kn~ } ~aH*ZA*f for(int i=0;i<nEndPos.length-1;i++) 5/mW:G,& { qkv.,z" nEndPos = nStartPos[i+1]; J=TbZL4y}4 } )^)V yI`O nEndPos[nEndPos.length-1] = nFileLength; r{kV*^\E } tqrvcnQr^ } 5SX0g(C ,u(g#T u *z $ I //启动子线程 1z~;c| fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; K4xZT+Qb for(int i=0;i<nStartPos.length;i++) %yQ-~T@ { g4d5G=y fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), mCtuyGY siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), w"-bO ~5h nStartPos,nEndPos,i); V/|Ln*rm Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); t9m:E fileSplitterFetch.start(); p7 !q#o } P-No;/!B# // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -z0,IYG } siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [j}%&$ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", P _Zf(`jJ nEndPos = " + nFileLength); &}w,bG$ // fileSplitterFetch[nPos.length-1].start(); "
%|CD"@ {Y'DUt5j I~"- //等待子线程结束 \,JRNL& //int count = 0; >S{1=N@Ev= //是否结束while循环 kOR%<#:J boolean breakWhile = false; ,y2ur 2 xVKx#X9yk I]Wb\&$ while(!bStop) )TyL3Z\>( { D2>EG~xWq write_nPos(); %dL|i2+*8 Utility.sleep(500); 'y}A3RqN breakWhile = true; _J
>K-O2dry* \I,<G7!0 for(int i=0;i<nStartPos.length;i++) Qkqn~> { 6!g3Juh if(!fileSplitterFetch.bDownOver) & 66G { `"(7)T{ breakWhile = false; fXIeCn break; 3Luv$6 } :":W(O } OU9=O> if(breakWhile) 0+r/>-3] break; HK&F'\'} =q[3/'2V$? wC=IN //count++; K
N0S$nW+ //if(count>4) ;=)CjC8) // siteStop(); xvp{F9~qT } # JuO uVu`TgbZ ]pb;q(?^ System.err.println("文件下载结束!"); [rPW@|^5 } TmX~vZ catch(Exception e){e.printStackTrace ();} K~,,xsy,G& } o?p) V^7 }tv- gMI%z2]'- //获得文件长度 *TE6p public long getFileSize() 7GK| A{r { LUo3y' int nFileLength = -1; .Ji
r<"*< try{ Di-"y, [ URL url = new URL(siteInfoBean.getSSiteURL()); &R*d/~SU HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ]X?+]9Fr httpConnection.setRequestProperty("User-Agent","NetFox"); s o~p+] f^%vIB ~[ {,s:vPoiA int responseCode=httpConnection.getResponseCode(); 'Q(A5zfN]Y if(responseCode>=400) eIof{# { zq4mT;rqz processErrorCode(responseCode); mW8CqW\Q5 return -2; //-2 represent access is error RNX}W lo-s } :?RK>}4|F S~Q7>oNm tinN$o
Xy String sHeader; =/dW5qy;*+ sSD(mO<( {_[l,tdZ for(int i=1;;i++) &,$A7: { Z"!C //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); M"p $9t //Utility.log(in.readLine()); O IewG5O sHeader=httpConnection.getHeaderFieldKey(i); /~
V"v"7E if(sHeader!=null) rKJ%/7m { 1uXtBk6 if(sHeader.equals("Content-Length")) TF=S \
Q { JxD@y}ZYE nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 'Fc&"(!|| break; $AsM 9D<BE } 3\D jV2t } 5>A3;P else 7ky(g' break; ix!u#7 } S~6<'N&[ } HHEFX9u catch(IOException e){e.printStackTrace ();} Iv/yIS catch(Exception e){e.printStackTrace ();} h Qu9ux kN]#;R6 lc5NC;JR Utility.log(nFileLength); aL=VNZ!Pqc a-QHm;_S o@pM??&x return nFileLength; Rut6m5> } u5R^++ j/B zbjq" 2d3wQ)2 //保存下载信息(文件指针位置) SxH}/I|W private void write_nPos() 9m6w.:S { /pb7 try{ 4&|9304<H output = new DataOutputStream(new FileOutputStream(tmpFile)); "lmiGR*u output.writeInt(nStartPos.length); 5utj$ha2 for(int i=0;i<nStartPos.length;i++) gWWy!H { z6{0\#'K // output.writeLong(nPos); Yhlk#>I output.writeLong(fileSplitterFetch.nStartPos); Rf%ver output.writeLong(fileSplitterFetch.nEndPos); >eUAHmXQ| } ~^5uOeTZ~ output.close(); zcZr
)Oh } K8ThZY% catch(IOException e){e.printStackTrace ();} Ak}l6{ .. catch(Exception e){e.printStackTrace ();} /+IR^WG#C} } n$=n:$`q }W|CIgF* gJF;yW4 //读取保存的下载信息(文件指针位置) 1m![;Pg3 private void read_nPos() 'GW@P { }y[o[> try{ {O^1WgGc[ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ?_tOqh@in int nCount = input.readInt(); #bdJ]v.n nStartPos = new long[nCount]; )m)>k` 0 nEndPos = new long[nCount]; ~RMOEH.o for(int i=0;i<nStartPos.length;i++) ;G\rhk { U`8)rtYw nStartPos = input.readLong(); ,5L&$Q6 nEndPos = input.readLong(); oFIs,[Go } G&n_vwZ% input.close(); 2qn~A0r } foJ|Q\Z,T catch(IOException e){e.printStackTrace ();} <B``/EX^ catch(Exception e){e.printStackTrace ();} u?'X%'K* } bpU^|r^W _D+7w'8h +b{h*WWdj private void processErrorCode(int nErrorCode) {u5)zVYC,U { 49kY]z|"w System.err.println("Error Code : " + nErrorCode); $@#nn5^IX } gXfAz, `o*eL Lk A!^,QRkRN //停止文件下载 YInW)My.h public void siteStop() OVivJx { bC@b9opD bStop = true; {9=U6m^R2 for(int i=0;i<nStartPos.length;i++) "3>#[o fileSplitterFetch.splitterStop(); 5VPuHY2 6>vj({,1Y* j<gnh } }3i@5ctQ } ER|5_ //负责部分文件的抓取 *yX_dgC>[ **FileSplitterFetch.java RE7[bM3a */ $L`7 J$'^ package NetFox; @'U4-x TZ*ib~
P.fgt>v] import java.io.*; f~U|flL^ import java.net.*; #Gg^fm 'x18F#g
#IXQ;2%E public class FileSplitterFetch extends Thread { \Lc]6?,R }0!\%7-Q 8t7hN?,t String sURL; //File URL 9GGBJTk- long nStartPos; //File Snippet Start Position
)3 v8 long nEndPos; //File Snippet End Position c,-< 4e int nThreadID; //Thread's ID nh8h?&q| boolean bDownOver = false; //Downing is over P$oa6`%l boolean bStop = false; //Stop identical >AfJxdd1 FileAccessI fileAccessI = null; //File Access interface +0a',`yc p1D-Q7F Ri3m438 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Z?@07Y[|K { Q^F-8 this.sURL = sURL; UU !I@ this.nStartPos = nStart; !#?tA/t@ this.nEndPos = nEnd; +tA rH
C] nThreadID = id; 9wwvh'T&NK fileAccessI = new FileAccessI(sName,nStartPos);//定位 0FW=8hFp, } JBg>E3*N FUOvH85f N0Y! public void run() [n^___7 { npe*A while(nStartPos < nEndPos && !bStop) cCeD3CuRA% { WFdS#XfV \:#b9t{B- tDwXb> try{ '-~86Q URL url = new URL(sURL);
KA< HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); H_2hr[ httpConnection.setRequestProperty("User-Agent","NetFox"); <zUmcZ String sProperty = "bytes="+nStartPos+"-"; *X>rvAd3 httpConnection.setRequestProperty("RANGE",sProperty); [v&_MQ Utility.log(sProperty); vSyN_ AB?$ $C>EnNx XNl!(2x'pb InputStream input = httpConnection.getInputStream(); W"0 # //logResponseHead(httpConnection); OkQSqL un\^Wmbw :I7MP byte[] b = new byte[1024]; ~Ch`A@=5 int nRead; JxWHrsh[ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Jv?e?U { I2Us!W>6- nStartPos += fileAccessI.write(b,0,nRead); }s|v-gRM{ //if(nThreadID == 1) ;L)}blN. // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); [WK_Vh{ } xv ja w_Ls.K5" i a|F Utility.log("Thread " + nThreadID + " is over!"); urN&."c bDownOver = true; Vy?w,E0^: //nPos = fileAccessI.write (b,0,nRead); BkJcT } ;F:(5GBi catch(Exception e){e.printStackTrace ();} y>o#Hq&qM } *oPSkEA{ } eu4x{NmQ hN} X11 vrbS-Z<S9 //打印回应的头信息 wx1uduT) public void logResponseHead(HttpURLConnection con) v#X? KqD { sM4wh_lO for(int i=1;;i++) 9}\T?6?8pX { 6lhVwgy3A String header=con.getHeaderFieldKey(i); "- Ns1A8 if(header!=null) J>'o,"D //responseHeaders.put(header,httpConnection.getHeaderField(header)); HOw][}M_w Utility.log(header+" : "+con.getHeaderField(header)); [Cs2H8=# else #8RQ7|7b| break; &@Q3CCDS } f+1]#"9i| } Nhf!;> UO&S6M]v7 #"Zr#P{P public void splitterStop() l^vq'<kI { wVPq1? 9 bStop = true; LY|h*a6Ym } J^W.TM&q$, ;aF / <r ,aN/``j= } S*]IR"YL ?e@Ff"Y@e FHD6@{{Gp" /* 'Hg(N?1" **FileAccess.java }l/md/C0 *//文件访问(定位,写) qV}zV\Nz package NetFox; _3E7|drIX import java.io.*; $""[(
d?0 _A,m@BCz vSX
6~m public class FileAccessI implements Serializable{ D"o>\Q ]EK"AuEz` //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 '[HFIJ0K! RandomAccessFile oSavedFile; saV3<zgx long nPos; >WpPYUbH *n*OVI8L wF%XM_M public FileAccessI() throws IOException *yf+5q4t { kY|_wDBSb\ this("",0); +-oXW>`& } Mz06cw& !98s[)B: \\'!<Bn2d public FileAccessI(String sName,long nPos) throws IOException ^GbyA YEp { HU'd/5fun oSavedFile = new RandomAccessFile(sName,"rw"); +<iw|vr this.nPos = nPos; hcBfau; r oSavedFile.seek(nPos); 0VbZBLe } qvt~wJf< #mj+|/0 :4WwCpgz, public synchronized int write(byte[] b,int nStart,int nLen) Y3-P* { x,>=X`T int n = -1; 3!d|K%J try{ uM\~*@ oSavedFile.write(b,nStart,nLen); x=H*"L= n = nLen; c)lK{DC } 1{,WY(,c catch(IOException e) Mpj3<vj { ~@-Az([H e.printStackTrace (); A$
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` } 7' 6m;b~F Yd,*LYd2EL u'N'<(\k return n; 9 ROKueP } L7KHs'c* ,mRN;|N qH-dT,`"{ } ;hg]5r_ bT>^%
H3 CSD8?k]2 /* "ex?
#qD& **SiteInfoBean.java w,l1&=d */ "'PDreS package NetFox; xLGAP-mx] nyMA%9,B >#kzPYsp public class SiteInfoBean { eAl&[_o|S #fFEo)YG LAr6J private String sSiteURL; //Site's URL YY.;J3C private String sFilePath; //Saved File's Path 2=#O4k.@ private String sFileName; //Saved File's Name `R; ct4- private int nSplitter; //Count of Splited Downloading File {g);HnmPN VRxBi!d j$Kubg(I5 public SiteInfoBean() ~gV|_G {//nSplitter的缺省值为5 2{ptV\f]D //default value of nSplitter is 5 Xu'u"amt this("","","",5); PM_q"}- } ypml22)kz v&?Bqj plp).Gq public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) N),Zb^~nw { Z|j8:Ohz sSiteURL= sURL; \V&ly/\
) sFilePath = sPath; L$jRg sFileName = sName; +ivz this.nSplitter = nSpiltter; pY:xxnE bG5c~ .t["kaA } Gd'^vqo< E2\)>YF{P '[A>eC++ public String getSSiteURL() mB!81%f%| { yP"_j&ef7 return sSiteURL; XL"e<P;t } }we"IqLb Jw86P= 2x`#
f0[ public void setSSiteURL(String value) m=n
V$H { l,d8%\ sSiteURL = value; ZkK +?:9 } Ru
sa
&#[ ZLO_5#< W58\V public String getSFilePath() Xe%n.DW m { 8HWY]:|oh return sFilePath; Ds-%\@p } 9J1&g(?>- U2K>\/ -~ I=b#tUBh8 public void setSFilePath(String value) myXp]=Sb? { )\s:.<?EQ sFilePath = value; 9t)t-t#P; } @4&sL] (q .Oim7JQ8 {UwJg public String getSFileName() s~TYzfA { KR z\ct| return sFileName; i1sc oxX3\ } O,DA{> *m M ,<%j *FqNzly public void setSFileName(String value) yJgnw6>r2 { ^91k@MC sFileName = value; L6',s4 } z? cRsqf }]f)Fz .&L#%C public int getNSplitter() 0tl { *ZY{^f return nSplitter; 3<Cd>o. } M.t5,NJ T%ha2X= O[-wm;_(=* public void setNSplitter(int nCount) ZL@7Mr!e { )ll}hGS nSplitter = nCount; R(hqBa/V } M>'-P } } #$Y^ +UN (D))?jnC ^%C.S : /* []u!piW **Utility.java ,. E:mm */ 3J@#V ' package NetFox; IoA"e@~t ) I@gy AU)Qk$c public class Utility { &;,w}) O/Da8#S< <iL+/^# public Utility() m-;u]X=a { fOrqY,P' n /rQ*hr mWO=(}Fb\ } w8>p[F5`O -BB 5bsjA //线程睡眠 JSO>rpO public static void sleep(int nSecond) dmf~w_(7 { N=|w]t0*yc try{ whvM^ Thread.sleep(nSecond); agt7b@-5= } 8;+t.{ catch(Exception e) -B@jQg@
> { ]1gt|M^ e.printStackTrace (); :vc[ iZ } <m9IZIY< } PN<Y&/fB
DGp'Xx_8 //日志 7 +? public static void log(String sMsg) A*@!tz< { lK}F>6^\ System.err.println(sMsg); eZf-i1lJ } z07!i@ue~ RN!oflb .w&{2,a3 public static void log(int sMsg) /eZAAH { N7Dm,Q ] System.err.println(sMsg); '9i:b]Hru } C[&Lh_F\ } I:='LH, m3.d!~U\ &oNy~l
o /* P3(u+UI3 **TestMethod.java +dR$;!WB3 */ '0w'||#1 package NetFox; $] w&`F- 6nxf<1 Rqu;;VI[ public class TestMethod { =@B9I<GKf ()XL}~I{!A b8T'DY;~ public TestMethod() #&&^5r-b- { ///xx/weblogic60b2_win.exe r?V\X7` + try{ U9kt7#@FDK SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); fz,8 < //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); H@OYtPHGR SiteFileFetch fileFetch = new SiteFileFetch(bean); ~I2IgEj>] fileFetch.start(); l6a,:*_ } QNn$`Qz. catch(Exception e){e.printStackTrace ();} S1zV.] !%]]lxi MNkysB( } <gJ|Wee m<r.sq&; oDA1#- public static void main(String[] args) RM QlciG { [ bE9Y; new TestMethod(); zn@tLLX } F5&4x"c } Ma wio5 点击下载更多相关资料
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