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/* rz`"$g+# **SiteFileFetch.java B~@Gfb>`' */ .A_R6~:: package NetFox; @SaxM4 import java.io.*; 4b,+; import java.net.*; oIj-Y`92! =&Tuh} EDh-pK public class SiteFileFetch extends Thread { 9HPwl LCzeE7x {Xr 9]g` SiteInfoBean siteInfoBean = null; //文件信息Bean XIdC1%pr; long[] nStartPos; //开始位置 IDpx_ long[] nEndPos; //结束位置 m6}_kzFz FileSplitterFetch[] fileSplitterFetch; //子线程对象 8A::q ; long nFileLength; //文件长度 jaavh6h) boolean bFirst = true; //是否第一次取文件 \!w | boolean bStop = false; //停止标志 zuFPG{^\# File tmpFile; //文件下载的临时信息 qzO5p=} DataOutputStream output; //输出到文件的输出流 suFk<^3 vCK+v
r! //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) KDV.ZSF7 public SiteFileFetch(SiteInfoBean bean) throws IOException a0 PU&o1EF { GZn=Hgv8 siteInfoBean = bean; jP2#w{xq //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); |b^UPrz)VS tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); $A/?evJi8R if(tmpFile.exists ()) d%nX;w,
{ 4%_xTo bFirst = false; .!i`YT*jF read_nPos(); R(8?9-w } %XZhSmlf else _ yDDPuAi { o-AF_N nStartPos = new long[bean.getNSplitter()]; ]ZW-`U MO nEndPos = new long[bean.getNSplitter()]; |B'4wF> } $"MVr5q6 -XK;B--c (plT/0=^t EAxdF
u } WB<MU:.Vc gf9U<J#&C ty4R2LnC public void run() ro3%VA=V { #N~1Ye //获得文件长度 nG{o$v_| //分割文件 5~im.XfiVx //实例FileSplitterFetch Q00v(6V46 //启动FileSplitterFetch线程 :("@U, //等待子线程返回 oe3=QE try{ 8|L@-F if(bFirst) Zg>]!^X8 { ,w9|?%S nFileLength = getFileSize(); 2dHsM'ze if(nFileLength == -1) x'OP0],# { 3 p?nQ
O)L System.err.println("File Length is not known!"); C+%eT&OO } [?qzMFb else if(nFileLength == -2) }QQ 7jE { `R7dn/ System.err.println("File is not access!"); X?&{<
vz } h;y}g/HZ else Qe4 % A { X%N!gy for(int i=0;i<nStartPos.length;i++) v"mZy,u { &5z9C=]e nStartPos = (long)(i*(nFileLength/nStartPos.length)); s16, *;Z } H8HVmfM for(int i=0;i<nEndPos.length-1;i++) ?UOaqcL { /` nkz nEndPos = nStartPos[i+1]; ]sE)-8 } piuM#+Y\'S nEndPos[nEndPos.length-1] = nFileLength; H!OX1F } &
BY\h: } %4V$')rek kt\,$.v8 26 1? 8&c //启动子线程 Oo FMOlb.Z fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; q4G$I?4 for(int i=0;i<nStartPos.length;i++) X Z3fWcw[ { W,H=K##6< fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 'Nuy/\[{\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), P{:Z xli0 nStartPos,nEndPos,i); 2mMi=pv9 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ,=c(P9}^ fileSplitterFetch.start(); Q>9bKP } ]\oT({$6B // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 1;i|GXY:h siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 4GG>n // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ^;9l3P{ nEndPos = " + nFileLength); =n_z `I // fileSplitterFetch[nPos.length-1].start(); mW+5I-~ XzqB=iX YktZXc?iI< //等待子线程结束 j72mm! //int count = 0; ^6F, lS _t //是否结束while循环 z 0zB&} boolean breakWhile = false; )PYh./_2 %|^,Q -i, 9ZatlI, while(!bStop) v6[VdWOx5 { fo`R=|L[ write_nPos(); , /jHhKW Utility.sleep(500); ?D_iib7 breakWhile = true; o:"(\$ }bdoJ5 9V&+xbR& for(int i=0;i<nStartPos.length;i++) m,62'
{ 6A|XB3 if(!fileSplitterFetch.bDownOver) yGrnzB6| { quC$<Y breakWhile = false; 1@|%{c&+9 break; m']$)Iqw } }u$c*} } dTu*%S1Z if(breakWhile) GM1.pVb break; n9k Nh/i'q/ *qAG0EM| //count++; vWrTB //if(count>4) ?EPHq,
E // siteStop(); WS(m#WFQr } f8=qnY2j d#$Pf=} v.vkQQ0[9 System.err.println("文件下载结束!"); 7+@-mJMP$D } &2[Xu4* catch(Exception e){e.printStackTrace ();} L:mE)Xq2 } L;L_$hu) }R5EuR m\
`d4xX@
//获得文件长度 x
_d public long getFileSize() gd#?rc*f<3 { M8 \/[R\ int nFileLength = -1; v@8SMOe% try{ P?c V d2Y URL url = new URL(siteInfoBean.getSSiteURL()); <1m` HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); o"L8n(\ httpConnection.setRequestProperty("User-Agent","NetFox"); *n#
=3D @JLN3 Qb%;
|li int responseCode=httpConnection.getResponseCode(); hNkv lk'Ui if(responseCode>=400) PVdN)tG5 { ~)>.%`v& processErrorCode(responseCode); ZGI<L return -2; //-2 represent access is error ?p 4iXHE } V>E7!LIn. c93 Ok | &`vThs[x String sHeader; kTT%<
e #.fJ
M:"tG _s5FYb# for(int i=1;;i++) D)l\zs%ie { vlZmmQeJm //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); #Dz"g_d //Utility.log(in.readLine()); p1i}fGS sHeader=httpConnection.getHeaderFieldKey(i);
cC| if(sHeader!=null) V*(x@pF { X%JyC_~< if(sHeader.equals("Content-Length")) ].aFdy { 0kls/^ 0, nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); $)PS#ND& break; n_ ?+QF } ,O-_Pv } .m>Qlh
else 6GVAR break; @2d9
7.X } M.Tp)ig\# } ?[>Y@we catch(IOException e){e.printStackTrace ();} -'d`(G" catch(Exception e){e.printStackTrace ();} +%KkzdS' #Z
`Tk)u/ 5WxNH}{ Utility.log(nFileLength); (a-Lx2 T 99By.+~pX O0`ofFN return nFileLength; AFvv+
ss } 5rCJIl. f?GoBh< TvT>UBqj= //保存下载信息(文件指针位置) 3B,dL|q(@J private void write_nPos() ~]?EV?T { KydAFxUb try{ 6@FhDj2X output = new DataOutputStream(new FileOutputStream(tmpFile)); On!+7is' output.writeInt(nStartPos.length); 5`Uzx u for(int i=0;i<nStartPos.length;i++) DKem;_6OQ { jTV4iX // output.writeLong(nPos); J.U%W}Hx output.writeLong(fileSplitterFetch.nStartPos); @icw:68 output.writeLong(fileSplitterFetch.nEndPos); cq
gCcO, } AGS(ud{ output.close(); (e!Yu#- } SAf)#HXa catch(IOException e){e.printStackTrace ();} \dE{[^.5 catch(Exception e){e.printStackTrace ();} OK`^DIr5l } PvjZoF[" `U\l: ~]e F6Q%<p a //读取保存的下载信息(文件指针位置) 8'TIDu private void read_nPos() 7P*\|Sxk% { fi ~@J` try{ dV'^K%# DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); eX}aa0 int nCount = input.readInt(); /?XI,#j3kM nStartPos = new long[nCount]; \Zx&J.D nEndPos = new long[nCount]; EL z5P}L6 for(int i=0;i<nStartPos.length;i++) Ars*H,9>e { }0@@_Y]CC nStartPos = input.readLong(); s?->2gxhx nEndPos = input.readLong(); Y+vIU*O } S# baOO input.close(); P0hr=/h4 } *kTp(*K/7` catch(IOException e){e.printStackTrace ();} ~7g$TAe{ catch(Exception e){e.printStackTrace ();} 8Exky^OT| } Q!=`|X|: EK0~3HSZ 60A!Gob private void processErrorCode(int nErrorCode) y x#ub-A8 { ev+H{5W8 System.err.println("Error Code : " + nErrorCode); _zzNF93Bn } !?+0O]`} #=ij</ 8No'8(dPX //停止文件下载 <6,,:=# public void siteStop() h>cjRH?e { cT/mi":8{ bStop = true; ;YMg4Cs for(int i=0;i<nStartPos.length;i++) R ;A8y fileSplitterFetch.splitterStop(); ?P>4H0@I+ u#^l9/tl k2,`W2]^E } ,mi7WW9 } K4]ZVMm/* //负责部分文件的抓取 5|Z8UzL **FileSplitterFetch.java UhkL=+PD */ O#O"]A package NetFox; `T7TWv"M `l.bU3C I2SH
j6- import java.io.*; o&z [d import java.net.*; hDZyFRg v.>K
)%`# l;R8"L:,p\ public class FileSplitterFetch extends Thread { ;
2V$`k \*b
.f OU#p^5K String sURL; //File URL 94t`&jZ&|u long nStartPos; //File Snippet Start Position r#&JfAo long nEndPos; //File Snippet End Position &V+KM"Ow int nThreadID; //Thread's ID X%(NI(+x, boolean bDownOver = false; //Downing is over Ej6ho 0_ boolean bStop = false; //Stop identical qP##C&+#q FileAccessI fileAccessI = null; //File Access interface J65:MaS Yl"CIgt "zQ<)Q]U public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException S-~)|7d. { z\8s |! this.sURL = sURL; o:3(J} this.nStartPos = nStart; >BK/HuS this.nEndPos = nEnd; kw gLK@@%1 nThreadID = id; BYhiP/^ fileAccessI = new FileAccessI(sName,nStartPos);//定位 x^pt^KR; } N'aq4okoL ]vs}-go k\j_hu public void run() "%a<+D { %,
iAngF' while(nStartPos < nEndPos && !bStop) 5/h-Hr { T{`VUS/ r%ebC OW@)6 try{ ^EkxZ4*g URL url = new URL(sURL); 7l=Tl[n HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ~OvbMWu httpConnection.setRequestProperty("User-Agent","NetFox"); H<<t^,E^.t String sProperty = "bytes="+nStartPos+"-"; mTUoFXX[ httpConnection.setRequestProperty("RANGE",sProperty); =2QP7W3mg< Utility.log(sProperty); :&'jh/vRN 9y5JV3 r7R.dD/. InputStream input = httpConnection.getInputStream(); =_m3~=Z //logResponseHead(httpConnection); }BL7P-km mv~?1aIKD yqL" YD byte[] b = new byte[1024]; kTI5CoXzq int nRead; +r;t] while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) tCGx]\ { &k)v/ nStartPos += fileAccessI.write(b,0,nRead); FPF$~ sX //if(nThreadID == 1) M<NY`7$^ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6<QC|>p } t6mv p[].4_B; }mIN)o Utility.log("Thread " + nThreadID + " is over!"); &IzNoB bDownOver = true; Is<XMR|{ //nPos = fileAccessI.write (b,0,nRead); j%w^8}U>G } hAc|a9 o catch(Exception e){e.printStackTrace ();} *V\.6,^v } EU|IzUjFj| } (S+/e5c) JR15y3F -@`Ah|m@} //打印回应的头信息 1ywdcg public void logResponseHead(HttpURLConnection con) 19y,O0# _ { 3#dz6+ for(int i=1;;i++) C#yRop_d]o { @H4]Gp ] String header=con.getHeaderFieldKey(i); fsw[R0B if(header!=null) \f(zMP //responseHeaders.put(header,httpConnection.getHeaderField(header)); E"S#d&9 Utility.log(header+" : "+con.getHeaderField(header)); |o9`h 9i else C,$o+q*)W9 break; w%iwxo } `sso Wn4 } W}3%BWn } eHxw+. S$$SLy:P public void splitterStop() #Ktk[ "6 { L97 ~ma bStop = true; T`Up%5Dk } BN%cX2j %*npLDi Z}\,rex } 6S_mfWsi 3c,4 wyn <; ?1#ok /* 39
zfbxX **FileAccess.java U!uJ )mm *//文件访问(定位,写) E0fMFG^P package NetFox; ~|O; Sdo= import java.io.*; )`'a1y| S5ai@Ksf Ay 4P_>^ public class FileAccessI implements Serializable{ {J,"iJKop ^0}wmxDq //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 s5mJ
- RandomAccessFile oSavedFile;
3F!)7 long nPos; *c/V('D/ m;{HlDez !9KDdU public FileAccessI() throws IOException g}R Cjl4 { T8|?mVv s this("",0); #5{xWMp/0 } KU
oAxA >bQOpGy}l X`WS&!C< public FileAccessI(String sName,long nPos) throws IOException Jj=N+,km { W'"?5} ( oSavedFile = new RandomAccessFile(sName,"rw"); )uo".n|n~B this.nPos = nPos; 3%GsTq2o oSavedFile.seek(nPos); $|J+ } AA=rjB9 4[]*=
glU9A39qx? public synchronized int write(byte[] b,int nStart,int nLen) ^AJ
2Y_}v { V?"U)Y@Y int n = -1; f"*4R
kG try{ =P9rOK= oSavedFile.write(b,nStart,nLen); k\T]*A n = nLen; KA{QGaZ/ } $b{8$<;9 catch(IOException e) JU5,\3Lz# { <X4f2z{T{@ e.printStackTrace (); H!X*29nX } XXA'B{@Y) aZ\Z7( ^w``(-[* return n; >#;;g2UV } 4~$U#$u_ sH2xkUp XP% _|Q2X } 7_qsVhh]$E |ZifrkD= VWK/(>TP /* CL7/J[TS **SiteInfoBean.java ;y@zvec4 */ kJO Z;X=9/ package NetFox; : fYfXm }wvR s5;o Gsy>"T{CY public class SiteInfoBean { |IzL4>m:; L/WRVc6 iM:-750n/ private String sSiteURL; //Site's URL z(^dwMw} private String sFilePath; //Saved File's Path .6
0yQ[aE private String sFileName; //Saved File's Name NopfL private int nSplitter; //Count of Splited Downloading File {cLWum[SY Viw,YkC Je9Z:s[ public SiteInfoBean()
2~g-k3 {//nSplitter的缺省值为5 F-ofR]|)> //default value of nSplitter is 5 4f8XO"k7t= this("","","",5); fSVM[ } # .(f7~ u^E0u^ ELMz~vp public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) E)jd>" { Bd=K40Z: sSiteURL= sURL; (,+#H]L sFilePath = sPath; md18q:AG) sFileName = sName; B= E/|J</ this.nSplitter = nSpiltter; *)^ZUk d$+0;D4E S["r
@< }
ip{b*@K XfMUodV-OZ AU%Yr6 public String getSSiteURL() p=x&X~
{ 6}c!>n[' return sSiteURL; o(l%k},a } )AdwA+-x
:KG=3un] tCR~z1 public void setSSiteURL(String value) m3P7*S5NJ7 { ^*$!9~ sSiteURL = value; IV':sNV } ~.U\Y hH;i_("i(h f]?&R c2C public String getSFilePath() 06.8m;{N { w^nA/=;r return sFilePath; `VGw5o } z%+rI [U^Cz{G g;AW public void setSFilePath(String value) d*k5h<jM { Rb:?%\= sFilePath = value; knV*,
} c>/7E-T '3Fb[md54 N:+EGmp public String getSFileName() ax;<idC} { T5T[$%]6 return sFileName; \j wxW6> } p*YV*Arv DyZ6&*s$ 0
.T5%
_/ public void setSFileName(String value) :cXN
Fu\C { MuzQz.C sFileName = value; 7AGUi+!ICl } wEI?
9 bvhV ~Cyn w( public int getNSplitter() e F}KOOfC {
;Q/1l=Bn return nSplitter; OR+py.vK } kqo4
v;r :2vuc!Pu j8^#698X public void setNSplitter(int nCount) t*Z5{ { b~)2`l nSplitter = nCount; E|_8#xvb } c`lL&*] } /FPO'} 6i !a!4^zqp upeioC q /* xy&*s\=: **Utility.java 3tUn?;9B */ ]{+Y!tD package NetFox; L %ifl:K ^4\0,> e(b$LUV public class Utility { r6aIW8 Z:x`][vg b~YIaD[Z public Utility() U-,s/VQ? { Z }>;@c 5^ubXA 3tkCmB } ^x^(Rk}| l)jP!k //线程睡眠 f$dIPt( public static void sleep(int nSecond) fWs*u[S { Q4]Od{[ try{ 4N7|LxNNl_ Thread.sleep(nSecond); t pxk8Ys } ]EQ*! catch(Exception e) o:4#AkS { '`W6U]7> e.printStackTrace (); dShGIH? } D,=#SBJ :Z } UFj!7gX ] DeT$4c*:[ //日志 ,TB$D]u8 public static void log(String sMsg) Vr%ef:uVV { 1B~Z1w System.err.println(sMsg); 4mX?PKvbn } I};*O6D` QJjk#*?,| TK~KM public static void log(int sMsg) Co=Bq{GY { u'DpZ System.err.println(sMsg); 8=0I4\ } :LdPqFXj } EUV8H}d5 &=:3/;c ZYt <O /* gMPp'^g]_ **TestMethod.java YZtd IG */ M&Ln'BC package NetFox; n:1Ijh
1 H ="I=} in K;n public class TestMethod { tAY{+N]f .EH1;/ I6@"y0I public TestMethod() C'Y2kb { ///xx/weblogic60b2_win.exe <Kl$ek8 try{ zE/\2F$ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 8`]yp7ueS //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); kh#fUAt SiteFileFetch fileFetch = new SiteFileFetch(bean); fl2XI=[v4 fileFetch.start(); Y
ZuA"l Y } \W=
qqE] catch(Exception e){e.printStackTrace ();}
fWi/mK3c V s=o@ ?Drq!?3PDc } Ve)BF1YG M,bs`amz vEGI public static void main(String[] args) 9zIqSjos" { *BF[thB:a new TestMethod(); L*vKIP<EMM } gA@Zx%0j } ]T2Nr[vu 点击下载更多相关资料
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