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/* g1(Xg. **SiteFileFetch.java +y[@T6_ */ K*K1(_x= package NetFox; 5_K5?N import java.io.*; F}Mhs17!| import java.net.*; G
DSfT{kK\ ,F+B Wot4 iMF<5fLH& public class SiteFileFetch extends Thread { 'f8(#n=6qP >YW\~T Auy".br' SiteInfoBean siteInfoBean = null; //文件信息Bean '2J0>Bla long[] nStartPos; //开始位置 /4=-b_2Y~ long[] nEndPos; //结束位置 C`oa3B,z FileSplitterFetch[] fileSplitterFetch; //子线程对象 si1*Wt<3Bc long nFileLength; //文件长度 _\5~>g_ boolean bFirst = true; //是否第一次取文件 71FeDpe boolean bStop = false; //停止标志 6XEZ4QP} File tmpFile; //文件下载的临时信息 fi PIAT} DataOutputStream output; //输出到文件的输出流 G"
b60RQ (A k\Lm
//负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ,zcQS-e2 public SiteFileFetch(SiteInfoBean bean) throws IOException lw8"'0 { (J$\-a7<f siteInfoBean = bean; z^*
'@ //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); <dA8
'7^ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); u%|zc= if(tmpFile.exists ()) |YJCWFbs8 { Qx|H1_6 bFirst = false; `znB7VQ0 read_nPos(); q)u2Y] } @b&84Gn2
r else 78#!Q.## { ;'T{li2 nStartPos = new long[bean.getNSplitter()]; # jYpVc{] nEndPos = new long[bean.getNSplitter()]; !Gs} tiMH } 4z7G2 Rz%e>) R U"/2i V|Tud } !KS F3sz hPm>tV2X 4FeEGySow public void run() x
FJg { *xRc *
:0 //获得文件长度 T*2C_oW //分割文件 R5Yl 1 //实例FileSplitterFetch /z."l!u6 //启动FileSplitterFetch线程 7D" %%|:
h //等待子线程返回 D _X8- try{ &!.HuRiuC if(bFirst) iMP { n/e
BE q nFileLength = getFileSize(); ?4t-caK^u if(nFileLength == -1) 1V&PtI3!! { Z%o7f6P0IX System.err.println("File Length is not known!");
GrJ#. } UgHf*m else if(nFileLength == -2) Gu(lI ~ { O0l^*nZ46t System.err.println("File is not access!"); e&Y0}oY } 'E;W else j28 _HhT { N?r>%4 for(int i=0;i<nStartPos.length;i++) my^ak*N { f*((;*n; nStartPos = (long)(i*(nFileLength/nStartPos.length)); q1Qje%9@t } S*W;%J5 for(int i=0;i<nEndPos.length-1;i++) 0O@_cW { y+mElG$F nEndPos = nStartPos[i+1]; To"dG&h } D=?{8 'R' nEndPos[nEndPos.length-1] = nFileLength; R zR?&J } +`en{$%% } wJ"ev.A) }Ag|gF!_ AMlV%U# //启动子线程 1IH[g*f fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; </oY4$ l' for(int i=0;i<nStartPos.length;i++) _uH9XGm { G"s0GpvQ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 7|YrdK< siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), M8W# io nStartPos,nEndPos,i); Y)HbxFF`/ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); B+VuUt{S fileSplitterFetch.start(); -/{af } <HoAj"xf // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), q|#MB7e/ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); mMw;0/n // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ma8wmQ9 JR nEndPos = " + nFileLength); S)\8|ym6! // fileSplitterFetch[nPos.length-1].start(); A=3HO\n5 y0q#R.TOm s3t!<9[m //等待子线程结束 Q}vbm4)[ //int count = 0; 'w<BJTQIL //是否结束while循环 jp<VK<s] boolean breakWhile = false; -e`;bX_N) m@qqVRn#) f@z*3I; while(!bStop) -zfoRU v { D&{
*AH%Q write_nPos(); b](o]O{v Utility.sleep(500); 0Qd%iP)6 breakWhile = true; ym%slg Df=q-iq<{/ TQ9'76INb for(int i=0;i<nStartPos.length;i++) 1p\Ak { qc8Ta" if(!fileSplitterFetch.bDownOver) 7[o {9Yp& { SE `l(-tL breakWhile = false; (O5)wej break; `.BR=['O } UmP'L! } 2R@%Y/ if(breakWhile) }=GM?,7b break; &TT":FPR V/y=6wUiSl 9{eBgdC //count++; cH"@d^"+q| //if(count>4) gbGTG(:1S // siteStop(); |O (G nsZ } HhSjR%6HY; } p'8w\C$ =7jEz+w# System.err.println("文件下载结束!"); l1-HO } qi=3L catch(Exception e){e.printStackTrace ();} :c4kBl%gJ } kV)'a Fj=NiZ= 0'yyfz //获得文件长度 DX@}!6|T public long getFileSize() FBYODw { km>o7V&4G int nFileLength = -1; Npa-$N&P{S try{ rz6jx URL url = new URL(siteInfoBean.getSSiteURL()); *SZ>upg HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }iNY_I c httpConnection.setRequestProperty("User-Agent","NetFox"); \iZ1W FMS2.E njMLyT($ int responseCode=httpConnection.getResponseCode(); 9*_uCPR if(responseCode>=400) 1%eLs=u? { /yYlu processErrorCode(responseCode); xH$%5@~ return -2; //-2 represent access is error _T~H[&Hl } =lrN'$z?% 8XbR X<xqT String sHeader; 878tI3- h)o]TV u2lmwE for(int i=1;;i++) 37>MJ { H1Xov r //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,OB&nN t> //Utility.log(in.readLine()); Nmf#`+7gCI sHeader=httpConnection.getHeaderFieldKey(i); <nA3Sd"QfV if(sHeader!=null) AQ}l% { 3wNN<R if(sHeader.equals("Content-Length")) \{>eOD_ { f[@#7,2~M nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); :&$Xe1)i] break; "jGe^+9uT } tc/ jY]'32 } dofR)"<p,^ else Mf7E72{D break; >sV Bj(f } :yD@5) } c~oe,9 catch(IOException e){e.printStackTrace ();} I"V3+2e catch(Exception e){e.printStackTrace ();} GTFl}t UCF[oO>v '%Dg{ zL Utility.log(nFileLength); ZOHRUm yS"0/Rm} g
=\13#F return nFileLength; J~2CD*v } m){&:Hs }rxFS
<j M=Is9)y //保存下载信息(文件指针位置) Na;t#, private void write_nPos() N[{]iQ { D[W}[r try{ 2$Y3[$ output = new DataOutputStream(new FileOutputStream(tmpFile)); h>Rpb#] output.writeInt(nStartPos.length); )fR1n}# for(int i=0;i<nStartPos.length;i++) UJs?9]x> { j)@oRWL< // output.writeLong(nPos); nP)-Y#`~7 output.writeLong(fileSplitterFetch.nStartPos); 1
'%-y output.writeLong(fileSplitterFetch.nEndPos); bgXc_>T6_y } 2 ^ kn5 output.close(); |Kn^w4mN } cFxSDTR catch(IOException e){e.printStackTrace ();} [r~~=b7*[ catch(Exception e){e.printStackTrace ();} RA~_]Hk } F~P/*FFK c$.T<r)Z P#9-bYNU //读取保存的下载信息(文件指针位置) JgZdS-~ private void read_nPos() "U{mMd!9L { qZc)Sa.S try{ gU*I;s> DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); > hesxC! int nCount = input.readInt(); CY\mU_.b nStartPos = new long[nCount]; y7
<(,uT nEndPos = new long[nCount]; /^WE@r[: for(int i=0;i<nStartPos.length;i++) '|+=B u { .Px,=56$X nStartPos = input.readLong(); ^f"&}%" M nEndPos = input.readLong(); 6P6Jx; } k dUc& input.close(); /3;=xZq } 'jwTGT5x catch(IOException e){e.printStackTrace ();} XAGiu;<,= catch(Exception e){e.printStackTrace ();} $o::PDQ? } w7[0 c{ZqQtfM :4b- sg# private void processErrorCode(int nErrorCode) m
R"9&wq {
2fbvU System.err.println("Error Code : " + nErrorCode); LDSbd,GF } yl|R:/2V aGe \.A= Pyit87h{ //停止文件下载 r]Z.`}Kkm public void siteStop() T&e%/ { [kQ"6wh8 bStop = true; gB'`I(q5. for(int i=0;i<nStartPos.length;i++) 1W4H-/Re fileSplitterFetch.splitterStop(); %0go%_ P}b Dn; \>_eEZ5 } &s_}u%iC } 96k(XLR //负责部分文件的抓取 ~c'\IM **FileSplitterFetch.java + >Fv*lux */ VdYOm package NetFox; :K5V/-[|V1 f2 VpeJ<p FxMMxY,*% import java.io.*; S:DcfR=a import java.net.*; + 4++Z O{O9}]6 7Co3P@@ public class FileSplitterFetch extends Thread { 6YB-}>? ~6=Wq64 %,h!: Ec^c String sURL; //File URL ~p0e=u long nStartPos; //File Snippet Start Position XP3QBq long nEndPos; //File Snippet End Position "4k"U1 int nThreadID; //Thread's ID oTZo[T@zRx boolean bDownOver = false; //Downing is over hlt9x.e.A boolean bStop = false; //Stop identical lb=2*dFJ1 FileAccessI fileAccessI = null; //File Access interface BD<rQ mfA^ k{!iDZr&f,
s$e K66H public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException D]3bwoFo&u { NO%|c|B| this.sURL = sURL; nau~i1 this.nStartPos = nStart; zV9
= this.nEndPos = nEnd; Ji)%Y5F nThreadID = id; P DNt4=C fileAccessI = new FileAccessI(sName,nStartPos);//定位 vWZ>Hf]`L } m3 x!*9h @|JPE%T )[F46?$vrk public void run() jLpgWt`8)E { 1ZGQhjcx while(nStartPos < nEndPos && !bStop) mJU>f-l { k|)^!BdO [j]}$fFe ZC>`ca try{ N GX-'w URL url = new URL(sURL); b*9m2=6 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); :C}KI) httpConnection.setRequestProperty("User-Agent","NetFox"); $L $j
KNwf String sProperty = "bytes="+nStartPos+"-"; S+4I[|T]Y httpConnection.setRequestProperty("RANGE",sProperty); YLr%vnO*NS Utility.log(sProperty); _%C_uBLi 0$Qn#K xV
}:M InputStream input = httpConnection.getInputStream(); Wl@0TUK //logResponseHead(httpConnection); S S7D1 x|P<F 2L |sDG>Zq? byte[] b = new byte[1024]; T=iZ9w int nRead; w%!k?t,*] while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) .je~qo) { 5+#?7J1 nStartPos += fileAccessI.write(b,0,nRead); 10a=YG //if(nThreadID == 1) =2GP^vh // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); D~t"9Z\ } E#WjoIk }-k_?2"A 98<bF{#0WM Utility.log("Thread " + nThreadID + " is over!"); h[M6. bDownOver = true; AOq9v~)z- //nPos = fileAccessI.write (b,0,nRead); 3:z4M9f } U[H+87zg catch(Exception e){e.printStackTrace ();} N69eIdl } BdRE*9.0 } _AsHw D:S6Mu DT1i2! //打印回应的头信息 >8.v.;` public void logResponseHead(HttpURLConnection con) ;8
/+wBnm { +)''l for(int i=1;;i++) `i_L?C7 { h<!khWFS String header=con.getHeaderFieldKey(i); e2_r0I^C if(header!=null) %$!R] B) //responseHeaders.put(header,httpConnection.getHeaderField(header)); 9 Le/'o vq Utility.log(header+" : "+con.getHeaderField(header)); v\r7.l:hf else 8kn]_6:3i break; HCn]# } `eA&C4oFOO } u:qD*zOq ~L Bq5a VAG+y/q public void splitterStop() zN8&M<mTl { LgD{! bStop = true; ?Pok-90 } c=U$$|qHV 6#lC(ko' _g/TH-;^ } /^es0$Co. ,EGD8$RA] d
>wmg*J /* xSMp[j **FileAccess.java SBYMDKZ *//文件访问(定位,写) WEY97_@ package NetFox; p7ns(g@9 import java.io.*; W@uH!n>k 3Wtv+L7Br ^QL/m\zq@% public class FileAccessI implements Serializable{ s5Bmv\e.i5 4jyr\=42F' //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 wshp{ y RandomAccessFile oSavedFile; qyG636i long nPos; e8ig[:B>+ u^4 "96aXJ spoWdRM2 public FileAccessI() throws IOException (w@MlMk { eL$U M this("",0); Kr}M>hF+| } c#4L*$ViF B$[%pm`'2 $y]||tX public FileAccessI(String sName,long nPos) throws IOException ?}lp o; $ { |?t8M9[Z oSavedFile = new RandomAccessFile(sName,"rw"); >cr_^(UW& this.nPos = nPos; >[P7Zlwv4 oSavedFile.seek(nPos); ws=9u- } GVHfN5bTqn +68K[s,FD ~)_ ?:.Da public synchronized int write(byte[] b,int nStart,int nLen) :pF]TY"K. { O]r3?= int n = -1; S&))
0d try{ re 1k] oSavedFile.write(b,nStart,nLen); W$VCST n = nLen; meVVRFQ2+ } QmkC~kK1. catch(IOException e) 8UY=}R2C { pQ-^T.' e.printStackTrace (); TWR#MVMI } zl0:U2x7 }.|5S+J?[ cPBy(5^ return n; r(2'0JQ } :R*^Izs= UE$[;Zg !7a^8
} &)f++(i /KvPiQ% m+8b2H:V /* xS\QKnG. **SiteInfoBean.java W<hdb!bE */ |I^Jn@Mq: package NetFox; 9xS`@ "` ;>8TNB e! +(P43XO08 public class SiteInfoBean { !DUg"o3G> <{xAvN(: byj mH private String sSiteURL; //Site's URL G mUs U{ private String sFilePath; //Saved File's Path 41Q private String sFileName; //Saved File's Name huD\dmQ:] private int nSplitter; //Count of Splited Downloading File Rc.<0# }GNH)-AG)$ n; '~"AG) public SiteInfoBean() 'GdlqbX(% {//nSplitter的缺省值为5 J]^gF| //default value of nSplitter is 5 A%8`zR this("","","",5); l|tp0[ } 3%4Mq6Q` D.CsnfJ
Dmv public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) $cpQ7 { kkBV;v%a sSiteURL= sURL; =28H^rK{ sFilePath = sPath; 1eyyu! sFileName = sName; D}/.;]w<[& this.nSplitter = nSpiltter; gx9sBkoq5D KA{DN! T2PFE4+Dp } V5@[7ncVf ue:P#] tx vKOn7 public String getSSiteURL() 6{r[ Dq { /ZN5WK return sSiteURL; AdS_-Cm } sU_4+Mk ]fS~N9B &OR*r7*Z public void setSSiteURL(String value) w[vIPlSdS { WHavz0knf[ sSiteURL = value; 5%aKlx9^# } jqsktJw#i @.@#WHde i-vJ&}} public String getSFilePath() tsC|R~wW { eKti+n. return sFilePath; 2DqHqq9m } SK}g(X7IWH kQ'xs%Fw ? /X6x1PN public void setSFilePath(String value) MC)W? { J0mCWtx& sFilePath = value; dQ~"b= } ]Tw6Fg1o> QN a3S* g
UAPjR public String getSFileName() qa`(,iN { A-!qO|E[- return sFileName; R$m?&1K } /,%o<Ql9 ~e~Mx=FT0 z:jF)N public void setSFileName(String value) WY~[tBi\ { 1L
qJ@v0 sFileName = value; rL/7wa } He;%6OG{ ]H'82a *G|]5 public int getNSplitter() l8lR5< { .Tqvy)' return nSplitter; wTbIS~!gF } VOOThdR *!s?hHv /[dAgxL public void setNSplitter(int nCount) ?+tZP3' { TmAb!
Y|F nSplitter = nCount; TBfl9Q } ?\VN`8Yb }
!@1!ld 5)i0g emIbGkH /* Pg C]@Q% **Utility.java G"sc;nT */ m 4LM10 package NetFox; RA67w& X1D:{S[ X_8NW, public class Utility { 6x8|v7cMH wIHz TL %d\+(:uu/ public Utility() A8Y~^wn { T`[ZNq+${ )`7h,w
J[1 Ap9wH[H } hrt-<7U u#|Jl|aT //线程睡眠 _Hj,;Z public static void sleep(int nSecond) Oip..f0 { %=eD)p7l- try{ 3iL&;D Thread.sleep(nSecond); iiB$<b.((I } rWmi 'niu catch(Exception e) M_I\:Q { .1lc'gu5y e.printStackTrace (); l6Bd<tSH } Bn:sN_N } pz =Wq4l xWV7#Z7 //日志 G<1mj!{Vp public static void log(String sMsg) >(a_9l;q { Xq^{P2\w1 System.err.println(sMsg); "
N4]e/.V } niBpbsO L]")TQ 4`]1W,t public static void log(int sMsg) 1_]l|`Po { e|y~q0Q$ System.err.println(sMsg); w Vmy`OV/ } nzDY!Y } mn` Ae= HEN9D/O= U%l{>*q /* .C?g nOq **TestMethod.java nJC}wh2d# */ b7mP~]V package NetFox; &T}e93] }$U6lh/Ep ]h@:Y] public class TestMethod { OSU=O
Q)&Ztw< mj~CCokF{? public TestMethod() _;W|iUreb { ///xx/weblogic60b2_win.exe }qPo%T try{ 8^T$6A[b SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); {eV_+@dT //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); _Z&R'`kg SiteFileFetch fileFetch = new SiteFileFetch(bean); ;_*F [
}w fileFetch.start(); Pp!W$C: } `BY`ltW catch(Exception e){e.printStackTrace ();}
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L~<~gA eyV904<F .jw)e!<\N public static void main(String[] args) =Y0m;-1M { MvFXVCT# new TestMethod(); RR|Eqm3) } .EQFHStr } RJM(+5xQ| 点击下载更多相关资料
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