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/* q%Fc?d9 **SiteFileFetch.java 14,Pf`5Sz */ EE<^q?[3^ package NetFox; ^Nu0+S import java.io.*; 6-w'? G37 import java.net.*; N1Pm4joH% 0-9.u`)#yu Q:#Kt@W public class SiteFileFetch extends Thread { V&>\U?q: <P"4Mk7`s ;& PK6G SiteInfoBean siteInfoBean = null; //文件信息Bean yXdJ5Me(T long[] nStartPos; //开始位置 G L> u3K long[] nEndPos; //结束位置 5cza0CriJ FileSplitterFetch[] fileSplitterFetch; //子线程对象 RC']"jpW long nFileLength; //文件长度 *xl930y boolean bFirst = true; //是否第一次取文件 l`}Ag8Q boolean bStop = false; //停止标志 <\If: File tmpFile; //文件下载的临时信息 uKBSv*AM DataOutputStream output; //输出到文件的输出流 Wveba)"$ ydyGPZt //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 1>!wm0;x public SiteFileFetch(SiteInfoBean bean) throws IOException v-J9N(y" { ;Q0WCm\5 siteInfoBean = bean; yQXHEB //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); RXj6L~vs5_ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); VZJ[h{ 6 if(tmpFile.exists ()) ^S'#)H-8C3 { Rt{`v< bFirst = false; W?B(Jsv read_nPos(); BIr24N }
/
hl:p else =`l).GnN2` { ~GWn > nStartPos = new long[bean.getNSplitter()]; h6Vm;{~ nEndPos = new long[bean.getNSplitter()]; <%2A,
Vz" } EpO5_T_ _E{hB P=j89-e :gNTQZR } {Va"o~io b(Ev : J} 03 5 public void run() RNJUA^{ { f#W5Nu'*! //获得文件长度 1{.=T&eG# //分割文件 mu1Lg s$; //实例FileSplitterFetch sZ,mRT //启动FileSplitterFetch线程 +foyPj!% //等待子线程返回 P
K]$D[a0 try{ _(q|W3 if(bFirst) N1LZ XXY{ { ':v@Pr| nFileLength = getFileSize(); G\?q{ if(nFileLength == -1) $6c8<!B_ { l]s,CX System.err.println("File Length is not known!"); ^:0epj7 } KvM}g2" else if(nFileLength == -2) INyakAmJ}- { Dw@0P System.err.println("File is not access!"); B>11 } $1CAfSgKw else G(puC4 "& { Ikkv <uY for(int i=0;i<nStartPos.length;i++) Y68T&swD { =DhzV
D nStartPos = (long)(i*(nFileLength/nStartPos.length)); !U@?Va~Zn } E,#J\)'z for(int i=0;i<nEndPos.length-1;i++) `+!GoXI { 0wzq{~\{=_ nEndPos = nStartPos[i+1]; S'I{'jP5 } +;}XWV nEndPos[nEndPos.length-1] = nFileLength; f8Xe%"< } s57-<&@J9 } jZm57{C#*? %mhnd): Y2DR
oQ //启动子线程 NY5?T0/[ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; K,>D%mJ for(int i=0;i<nStartPos.length;i++) ?5%|YsJP_ { {&'u1y R fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), %#.HFK siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 4DL;/Z: nStartPos,nEndPos,i); .Jt&6N Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); =Of!1TR( fileSplitterFetch.start(); *N0R3da } b ;Vy=f // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), $?l? siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Ba$Ibq,r/ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", CL^MIcq? nEndPos = " + nFileLength); FuZ7xM, // fileSplitterFetch[nPos.length-1].start(); ~$0Qvyb> V 4RtH JZ[~3swR //等待子线程结束 QOECpk- //int count = 0; ~ituPrH%< //是否结束while循环 `};8 boolean breakWhile = false; 5N:THvh6o %5=XszS DcN s`2 while(!bStop) p",HF% { t}E1NXW write_nPos(); 2EubMG Utility.sleep(500); 3
;F=EMz{ breakWhile = true; {YCquoF hi>sDU<x <}c`jN!z. for(int i=0;i<nStartPos.length;i++) <y(uu(c { F<y5zqGy@ if(!fileSplitterFetch.bDownOver) ELp @/c=Wr { ^/Id!Y7 breakWhile = false; ]_S&8F}| break; =o5ZcC } +"!,rZ7,A } _5^p+ if(breakWhile) V`KXfY break; '[]V%^F 4#?OxvH !b"#`O%` //count++; E%M~:JuKd? //if(count>4) cH()Ze-B // siteStop(); ;r[@;2p*( } dkuB{C, ; 4E0%@R q%=`PCty System.err.println("文件下载结束!"); S6 F28 d[j } nn@"68]g catch(Exception e){e.printStackTrace ();} mbBd3y } 5$Yt@8; Aw)='&;^z 6]dK, //获得文件长度 8X`Gm!) public long getFileSize() L;=<d { Gw6*0&3') int nFileLength = -1; JVA JLq try{ (]Z%&>* URL url = new URL(siteInfoBean.getSSiteURL()); iHo2=Cz HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); &|7pu= httpConnection.setRequestProperty("User-Agent","NetFox"); )1a3W7 X I\zEXO {]~b^=qE$ int responseCode=httpConnection.getResponseCode(); uE~? 2G if(responseCode>=400) odPq<'V|AY { [-cYFdt"V processErrorCode(responseCode); +*3\C! return -2; //-2 represent access is error 317Lv
\[ } vcsi@! M0<gea\ = iWu$$IV?- String sHeader; 2G8f4vsC[ o$>A;< J7BfH,o for(int i=1;;i++) Ij
hC@5qk { ~A+DH //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Ti
}Ljp^O //Utility.log(in.readLine()); bWK}oYB* sHeader=httpConnection.getHeaderFieldKey(i); F>,kKR- if(sHeader!=null) Z
4uft { _dY6Ip% if(sHeader.equals("Content-Length")) 4r!8_$fN?G { y&NO[ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); <qs>c<Vj break; =$UDa`}D } ajuwP1I } Mg]q^T.a else S(jbPQT break; }E+}\& } Bry\"V"'g } %N@454enH catch(IOException e){e.printStackTrace ();} 8V%(SV catch(Exception e){e.printStackTrace ();} c *(]pM N=&~3k RS G\3( Utility.log(nFileLength); 89:Y s= f5+a6s9 NaC^q*>9 return nFileLength; Wa%Zt*7 } m]JZ@ oJy ]n9 4f<%<Z //保存下载信息(文件指针位置) 'u$e2^ private void write_nPos() 5An|#^] { MzRURH, try{ MNNPBE output = new DataOutputStream(new FileOutputStream(tmpFile)); Sc;WraEn2 output.writeInt(nStartPos.length); FA?xp1E for(int i=0;i<nStartPos.length;i++) U@dztX@u { CF3Z`xD // output.writeLong(nPos); JK.lL]<p i output.writeLong(fileSplitterFetch.nStartPos); Q*mzfsgr output.writeLong(fileSplitterFetch.nEndPos); q
bb:)> } w
`6qT3v output.close(); ZKyK#\v< } #L.fGTb catch(IOException e){e.printStackTrace ();} `<2y
[<y catch(Exception e){e.printStackTrace ();} Tm@d;O'E1 } VL"!.^'c #r;
'AG SLO;c{EFH //读取保存的下载信息(文件指针位置) /u{ 9UR[g private void read_nPos() ymSGB`CP { A.m#wY8 try{ VZ{aET! DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); j8?z@iG int nCount = input.readInt(); 4lH$BIAW nStartPos = new long[nCount]; "BZ6G` nEndPos = new long[nCount]; RG-pN() for(int i=0;i<nStartPos.length;i++) $QmP'
< { S P)$K= nStartPos = input.readLong(); =1fO"|L nEndPos = input.readLong(); S/& _ } 0f/=C9L input.close(); ma>{((N } "0Uh(9Fv catch(IOException e){e.printStackTrace ();} ?as)vYP catch(Exception e){e.printStackTrace ();} KHKf+^u u } x(h(a#,r HJ]\VP9Zb i /R8Gb private void processErrorCode(int nErrorCode) O`U&0lKi' { f m.-*`ax System.err.println("Error Code : " + nErrorCode); M0DdrL/
L } utKtxLX" 'x
BBQP ZurQr} //停止文件下载 4]RGLN public void siteStop() }Og zSnR { IF%^HK@ bStop = true; 7(lR$,bE;= for(int i=0;i<nStartPos.length;i++) *;. l/ fileSplitterFetch.splitterStop(); \2)a.2mAz Gd1%6}<~ s2L|J[Y"s } ;AK;% } g2.%x \d //负责部分文件的抓取 " &'Jw **FileSplitterFetch.java 'F^nW_ryW */ :ak D package NetFox; NJSzOL_ sF^3KJ| /~V.qisZ import java.io.*; %m1k^ import java.net.*; y-O#
+{7 1[o] u:m9U n}PK0 public class FileSplitterFetch extends Thread { {C Qo}@.7 +ia F$ !fr /WxJ String sURL; //File URL .g_BKeU long nStartPos; //File Snippet Start Position Lc(D2=% long nEndPos; //File Snippet End Position dHc38zp int nThreadID; //Thread's ID S3]Cz$ boolean bDownOver = false; //Downing is over s`M[/i3Nm boolean bStop = false; //Stop identical Au &NQ+ FileAccessI fileAccessI = null; //File Access interface Ffk$8" 2
|w;4 GJW+'-f public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException tmiRv.Mhn< { "I?sz)pxG this.sURL = sURL; 1XQJ#J1/ this.nStartPos = nStart; ]8KAat~J this.nEndPos = nEnd; Gjq:-kX\ nThreadID = id; @gc lks/M fileAccessI = new FileAccessI(sName,nStartPos);//定位 oomB/"Z } #$7 z X9C)FS (qT_4b~ public void run() pe=Ou0 { Yf
>SV # while(nStartPos < nEndPos && !bStop) Bt4
X { ~(kIr?^ [vb>5EhL! /*s:ehj try{ L8n1p5gx3 URL url = new URL(sURL); FDM&rQ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7q?u`3l httpConnection.setRequestProperty("User-Agent","NetFox"); 4mSL*1j String sProperty = "bytes="+nStartPos+"-"; vUl5%r2O4 httpConnection.setRequestProperty("RANGE",sProperty); HubSmbS1 Utility.log(sProperty); C-4NiXa pisjfNT`o [?$ZB),L8 InputStream input = httpConnection.getInputStream(); 0 ;kcSz //logResponseHead(httpConnection); iaBy/!i 2MwRjh_ aZ^P*|_K3 byte[] b = new byte[1024]; |E$Jt-' int nRead; 5&q@;vR while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) {bnNY { o.U$\9MNP nStartPos += fileAccessI.write(b,0,nRead); 5\1Z"? //if(nThreadID == 1) CZyOAoc< // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^G%Bj`% } $by-?z(( CL%?K<um /'?Fz*b Utility.log("Thread " + nThreadID + " is over!"); J&UFP{) bDownOver = true; |1J=wp)# //nPos = fileAccessI.write (b,0,nRead); +RS>#zd/= } > ^fY`x, catch(Exception e){e.printStackTrace ();} R<
@o]p } e:}8|e~T } Q#P=t83 qR0V\OtgY~ $~c?qU //打印回应的头信息 3?I^D /K^ public void logResponseHead(HttpURLConnection con) x'*,~u { +F q`I2l| for(int i=1;;i++) \ &1)k/ { SvC|"-[mJ String header=con.getHeaderFieldKey(i); F_;oZ if(header!=null) "8|y //responseHeaders.put(header,httpConnection.getHeaderField(header)); oZ95 )'L, Utility.log(header+" : "+con.getHeaderField(header)); 7><n e|% else CK[2duf^~ break; B;tU+36nM } Cd)e_& } Et~b^8$> FrD.{(/~ f'aQ T public void splitterStop() ']^e,9=Q { u%?u`n2' bStop = true; e"(l } 5zG6V2 i$[wgvJIV
W Da;wt } I7b(fc-r ]$(::'pmK ,t5X'sY L /* *9)7.}uY **FileAccess.java >kOc a *//文件访问(定位,写) k7P~*ll$ package NetFox; aVvi_cau import java.io.*; p'1n'|$e p#~'xq m&o}qzC'y public class FileAccessI implements Serializable{ mLX1w)=r VpSk.WY/ e //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ie+&@u RandomAccessFile oSavedFile; *>%34m93 long nPos; ):?ype> p.i$[6M T.="a2iS2 public FileAccessI() throws IOException hkSpG{;7 { K[)N/Q this("",0); nW+rJ } m! &bK5+* Kv"e\
E b1{~j]"$L public FileAccessI(String sName,long nPos) throws IOException Zy@35;r { %Q"zU9 oSavedFile = new RandomAccessFile(sName,"rw"); 0?l|A1I% this.nPos = nPos; _i~n!v oSavedFile.seek(nPos); ]YkF^Pf!v } [9UKVnX.V g6EdCG.V xG0IA 7 public synchronized int write(byte[] b,int nStart,int nLen) 8,2l >S { Z:aDKAboU int n = -1; EAo7(d@ try{ 9oS \{[x. oSavedFile.write(b,nStart,nLen); b6_*ljM n = nLen; ncJ}h\:Sk } AC3K*)`E catch(IOException e) (u85$_C { K1uN(T.Ju e.printStackTrace (); A@*P4E`xp } w_G/[R3 ,$5; nS[0g^} return n; ZmO/6_nU? } ?6Cbx6 uoFH{.) #/sKb2eQ } ba|x?kz )/2* <jr jo=XxA /* y=YD4m2 W **SiteInfoBean.java &Th/Qv}[ */ td4*+)'FY package NetFox; !JUXq $/,qw
F0:Fv; public class SiteInfoBean { '[JrP<~^o "[@-p 7;KmJ}$ private String sSiteURL; //Site's URL |Z6rP- private String sFilePath; //Saved File's Path isHa4 D0 private String sFileName; //Saved File's Name oju/%ieh private int nSplitter; //Count of Splited Downloading File VY<v?Of
i- : QSlctW CZE5RzG public SiteInfoBean() `d6
{Tli {//nSplitter的缺省值为5 ~ $#DB@b //default value of nSplitter is 5 f[ GH this("","","",5); MUz.-YRt } ]tH/87qJ btw_k+Fh +^<CJNDL9 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Z<En3^j` { Jjik~[<q: sSiteURL= sURL; 2j-|.l c sFilePath = sPath; ] =b?^' sFileName = sName; :Y
y+% this.nSplitter = nSpiltter; al=Dy60|z bj(U?$ eJE?H] } O(,Ezyx ru3nnF_I s['F?GWg public String getSSiteURL() ?nrd$, { ^C>i(j& return sSiteURL; Lcplc"C } ?v#t{e0eQ MR%M[SK1 Rb<aCX public void setSSiteURL(String value) 3s\2 9gq { hnL"f[p@gC sSiteURL = value; LYGFEjS[ }
V!c{%zd {"y{V j9%u& public String getSFilePath() G9 z Q{E { \% &QIe;:k return sFilePath; B9iH+
]W } :g'"*VXYB z1f~:AdL L|S#(0 public void setSFilePath(String value) ]N-K`c] { |k)h' ? sFilePath = value; F0bmGDp@- } (Z) B^U5=L[:p Ha$|9li` public String getSFileName() ?ZdHuuDN~ { f!P.=Qo[= return sFileName; +%eMm.( } ,V)yOLApVj vkE6e6,Qc nE]R0|4h public void setSFileName(String value) $k@reN9 { 9XF+?
x sFileName = value; P~;NwHZ?k } mn*.z!N= q ]rsp0P2 +F&w~UT public int getNSplitter() |GL#E"[&' { 3RscuD& return nSplitter; /QHvwaW[ } p}R)qz-=5U mY(~94{d @s2z/h0H public void setNSplitter(int nCount) y M , hF { |w6:mtaS nSplitter = nCount; azPFKg+ } @]WN|K } M <"&$qZ$R D?qA
aq&4 )Y
Qtrc\91 /* qQ/j+ **Utility.java $>OWGueq64 */ :uZcN package NetFox; HkJ$r<J2 SR%h=`t O9p8x2 public class Utility { s~]Ri:7~ wjoxfPnf (J\"\#/d public Utility() vhTte
|( { 6T"[M cQu1WgQ
G a[xEN7L~4D } YX18!OhQ v)d\
5#7 //线程睡眠 ,S:g5n >M public static void sleep(int nSecond) Jmf&&)p { TaG'? try{ [#)-F_S Thread.sleep(nSecond); |6"zIHvtc } 6jRF[N8 catch(Exception e) xO'1|b^& { /=lrdp!a e.printStackTrace (); ;,JCA#
N } puL1A?Y8UM } |0B h bf'@sh%W //日志 /AjGj*O public static void log(String sMsg) Q6RBZucv { /tJJ2 =%l System.err.println(sMsg); Ca*^U- } #J, `a. QlSZr[^v 9W5vp:G public static void log(int sMsg) E{_p&FF { jv5p_v4%O System.err.println(sMsg); u(\b1h n } #8%Lc3n } '?v.O} ^B1Q";#
B^ +*DXzVC /* .B"h6WMz **TestMethod.java W _yVVr */ (VWTYG7 package NetFox; U:#9!J?41 4 rw<C07Z ^WVH z;
public class TestMethod { (4>k+ H j Bl I^ zK}$W73W^ public TestMethod() !HY+6!hk { ///xx/weblogic60b2_win.exe 1$q SbQ try{ x
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2]~- SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); `V$i*{c:# //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); FlrLXTx0 SiteFileFetch fileFetch = new SiteFileFetch(bean); X@\rg}kP fileFetch.start(); x!tCK47Yq } zo7Hm]W` catch(Exception e){e.printStackTrace ();} rts@1JY[ s0E:hn: &xj?MgdNL } R% l=NHB} = =cAL"Z 8qrE<RHU@ public static void main(String[] args) i?A4uyYwS { ]}w~fjq new TestMethod(); {Tm31f(oD } ](aXZ<, } DdN{=}A 点击下载更多相关资料
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