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/* <%(nF+rQA" **SiteFileFetch.java ~PT(/L */ \pzqUTk package NetFox; Ny;(1N|&3 import java.io.*; i%+p\eeq* import java.net.*;
*Mt's[8
\|Qx`- 0ih=<@1 K public class SiteFileFetch extends Thread { 89>U Koc? S-"OfWg< ,H3~mq] SiteInfoBean siteInfoBean = null; //文件信息Bean zY<=r.m4 long[] nStartPos; //开始位置 VP$ `.y long[] nEndPos; //结束位置 !\a'GO[ FileSplitterFetch[] fileSplitterFetch; //子线程对象 %Ot22a long nFileLength; //文件长度 ZJ} V>Bu- boolean bFirst = true; //是否第一次取文件 -E4e8'P;5 boolean bStop = false; //停止标志 1/Pou)D File tmpFile; //文件下载的临时信息 \c&%F=1+* DataOutputStream output; //输出到文件的输出流 ?hh4M g4WN+y` //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ZB'/DO=i public SiteFileFetch(SiteInfoBean bean) throws IOException .`84Y { Z-RgN siteInfoBean = bean; aClXg- //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ic:_v?k tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); VRYj&s'@ if(tmpFile.exists ()) )5r *2I { @N`) Z3P+ bFirst = false; ocCC63J read_nPos(); V:rq}F} } T`f6`1x else F:.rb
Ei { W6t"n_%?" nStartPos = new long[bean.getNSplitter()]; >!|Hns nEndPos = new long[bean.getNSplitter()]; wRL=9/5(8 } 0/d+26lR 33lD`4i+ <wge_3W# ~3Y)o|D3 } UdmYS3zs YFD'&N,sx 'W5r(M4U public void run() 9x/HQ(1 { ?Gc9^bB I //获得文件长度 LlP_`fA //分割文件 s+>VqyHgf //实例FileSplitterFetch U+t|wK //启动FileSplitterFetch线程 Gxu&o%x[ //等待子线程返回 j?ihUNY!+ try{ -b"7WBl if(bFirst) yjODa90!G { ^w.x~#zI nFileLength = getFileSize(); *ktM<N58 if(nFileLength == -1) |?n=~21"1O { 'v.i' 6 System.err.println("File Length is not known!"); $9dm2#0d } )cnB>Qul else if(nFileLength == -2) wt4uzg8 { TTaSg\K System.err.println("File is not access!"); HDUtLUd } V3fd]rIP else i$HaE)qZ { 6CBk,2DswI for(int i=0;i<nStartPos.length;i++) L;=:OX0 { 1>OfJc(K nStartPos = (long)(i*(nFileLength/nStartPos.length)); [H5TtsQ[ } TN}YRXtW+ for(int i=0;i<nEndPos.length-1;i++) 4]jN@@ { [6Y6{.%~ nEndPos = nStartPos[i+1]; f?T6Ne' } [$_d|Z nEndPos[nEndPos.length-1] = nFileLength; D;.O# bS } mw9;LNi\D } z5PFppSQ J&w%lYiu5 K^bzZa+a //启动子线程 :1"{0gm fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; h%
BA,C for(int i=0;i<nStartPos.length;i++) ;hi+.ng_ { jA R@?X fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hc}dS$=C siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), vh3Xd\N nStartPos,nEndPos,i); 7q*L-Xe]k Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); O;c;>x_dA fileSplitterFetch.start(); /Fej)WQp } dg/OjiD[P // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 'NF_!D siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); {7&(2Z]z // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", =D.M}xqo nEndPos = " + nFileLength); ,@ A1eX} // fileSplitterFetch[nPos.length-1].start(); lj$\2B %m]9"; L@Fw;G|%' //等待子线程结束 ^OKCvdS //int count = 0; xg %EQ //是否结束while循环 [{e[3b*M| boolean breakWhile = false; !0:uM)_k PLR[nB7K J
>Zd0Dn while(!bStop) i8pM,Ppi~ { a9PSg/p write_nPos(); _?&$@c Utility.sleep(500); {s!DRc]ln breakWhile = true; ZKTOif} UA$
XjP n5dFp%k for(int i=0;i<nStartPos.length;i++) O,6Upk { Q':x i;?Kt if(!fileSplitterFetch.bDownOver) 2C^/;z { laN:H mR8 breakWhile = false; 7UvfXzDNC break; %7 h_D } <CIJg* } ko\VDyt, if(breakWhile) F2!C^r,~L break; !K^.r_0H. v
0mc1g+9 h}fz`ti U //count++; d)F~)}TFM //if(count>4) K.c6n,' // siteStop(); 8<ZxE(v } =!m5'$Uz> 57IAH$n8o ^c3~CD5H
3 System.err.println("文件下载结束!"); 3RG*:9 } :5hKE(3Q catch(Exception e){e.printStackTrace ();} ocBfs^ aW } MIvAugUOl ,R/HT@ 4d3]L`
f //获得文件长度 nsFOtOdd public long getFileSize() L
A-H { |f1 S&b. int nFileLength = -1; {_QXx try{ Gqq%q!k&1 URL url = new URL(siteInfoBean.getSSiteURL()); <a7y]Py HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); \xG>>A% httpConnection.setRequestProperty("User-Agent","NetFox"); 8 hx4N J'9hzag ]TQ2PVN2 int responseCode=httpConnection.getResponseCode(); v'uWmL7C if(responseCode>=400) Y`jvza% { $j*%}x~[ processErrorCode(responseCode); %Cbqi.iuQ return -2; //-2 represent access is error OW1i{ } I\E`xkbBu ,K=\Y9l3 (hej
3;W String sHeader; .&dW?HS P3X;&iT D@ut -J(. for(int i=1;;i++) b,"gBg { KM$Lu2 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); `>&V_^y+ //Utility.log(in.readLine()); /.r|ron:e sHeader=httpConnection.getHeaderFieldKey(i); p>Dv&fX if(sHeader!=null) v3!oY t:l { :N$^x /{ if(sHeader.equals("Content-Length")) Z18T<e { =.`(KXT nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); .lnyn|MVb break; S]&f+g}&w } SyFw } yJ*`OU# else 7(cRm$)L break; 1!_$HA } [. Vy } {`,dWjy{% catch(IOException e){e.printStackTrace ();} _/Ky;p. catch(Exception e){e.printStackTrace ();} ,:POo^!/fT uFQ;}k;} vYQ0e:P Utility.log(nFileLength); 4FURm@C6 Nn<TPT[, e;L++D return nFileLength; h>\T1PM } J%ng8v5ex JDPn
n{sF'n</ //保存下载信息(文件指针位置) SQ%B"1&$D private void write_nPos() ;NNYJqWd^] { j"6r]nc& try{ o %GVg output = new DataOutputStream(new FileOutputStream(tmpFile)); 8,iBG! RF output.writeInt(nStartPos.length); &Omo\Oq&W> for(int i=0;i<nStartPos.length;i++) lz2B,# { 02B *cz_K // output.writeLong(nPos); D2N| A output.writeLong(fileSplitterFetch.nStartPos); vN#?>aL output.writeLong(fileSplitterFetch.nEndPos); 0#1hkJ" } 'J\nvNm output.close(); Fy:CG6@X } ]@E_Hx{S catch(IOException e){e.printStackTrace ();} mQEE?/xX; catch(Exception e){e.printStackTrace ();} {*utke]}* } n
N.6?a &V/n!|q<H vbEAd)*S //读取保存的下载信息(文件指针位置) >h:rYEsh8V private void read_nPos() LsaE-l { \Ps}1)wT try{ cV]c/*zA DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); kaM=Fk=t int nCount = input.readInt(); zq]I"0Bi. nStartPos = new long[nCount]; 5cj]Y)I-~ nEndPos = new long[nCount]; B(tLV9B3Q for(int i=0;i<nStartPos.length;i++) C\"nlNKw { qw^kA? nStartPos = input.readLong(); We%HdTKT nEndPos = input.readLong(); .*FBr7rE\ } NGQBOV input.close(); A|jmp~@K)+ } XC44]o4jx catch(IOException e){e.printStackTrace ();} '-9B`O,& catch(Exception e){e.printStackTrace ();} #snwRW>=[ } Xwz9E!m F}9!k LR xvo""R/g8 private void processErrorCode(int nErrorCode) pJ8;7u { U\OfB'Dn System.err.println("Error Code : " + nErrorCode); TCShS}q;% } z[Sq7bbYO j v9DQr Dp1FX"a) //停止文件下载 O3ij/8f public void siteStop() ivTx6-] { wJ.?u]f@ bStop = true; K]c|v
i_D for(int i=0;i<nStartPos.length;i++) scr`] tD fileSplitterFetch.splitterStop(); pO]{Y?X: e!V3 /*F #63)I9> } 117`=9F } R=Qa54 //负责部分文件的抓取 nsf.wHGZ"J **FileSplitterFetch.java }ACWSk WK */ (!'=?B " package NetFox; KWuc*! Eo
h4#fZ\N ,_SE!iL import java.io.*; #B_Em$ import java.net.*; 8ckcTNPu _6U=7<f vP k\b 3E public class FileSplitterFetch extends Thread { {T;A50 [\i0@ S"-q*!AhK String sURL; //File URL D1xIRyc/ long nStartPos; //File Snippet Start Position k@}?!V*l long nEndPos; //File Snippet End Position Evjvaa^ int nThreadID; //Thread's ID 0EWov~Y? boolean bDownOver = false; //Downing is over lI,lR boolean bStop = false; //Stop identical p~v
rr 5 FileAccessI fileAccessI = null; //File Access interface sY|by\-c %P3|#0yg0 #:q$sKQ_$ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException YJ6y]r
K2, { RC[mpR;2 this.sURL = sURL; /R/\>'{E&c this.nStartPos = nStart; dWR-}> this.nEndPos = nEnd; _1>Xk_ nThreadID = id; Re[x$rw fileAccessI = new FileAccessI(sName,nStartPos);//定位 !'
} } Fa"/p_1 j<* c@|!0
U%j public void run() k4HE'WY { S*aMUV& while(nStartPos < nEndPos && !bStop) ,Wbr;
zb { 9`a1xnL UrC>n N}|<P[LW try{ g$^:2MT"aQ URL url = new URL(sURL); NA :_yA" HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /m"#uC!\ httpConnection.setRequestProperty("User-Agent","NetFox"); pxGDzU String sProperty = "bytes="+nStartPos+"-"; _ ^2\/@ httpConnection.setRequestProperty("RANGE",sProperty); #
dA-dN Utility.log(sProperty); o$4i{BL {4C/ZA{|l crwui 8 InputStream input = httpConnection.getInputStream(); B,xohT //logResponseHead(httpConnection); a+-X\qN c}-ADr9 5%6{ ePh{ byte[] b = new byte[1024]; |>'.( int nRead; 13JZ\`ceb while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) *ku}.n { _L^(CFE nStartPos += fileAccessI.write(b,0,nRead); _ArN[]Z //if(nThreadID == 1) x$SxGc~4gb // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); <<SUIY@X } $>M-oNeC w7#9t ,P>xpfdK Utility.log("Thread " + nThreadID + " is over!"); On`T
pz/ bDownOver = true; 1(YEOZ
//nPos = fileAccessI.write (b,0,nRead); hvFXYq_[O } qN=l$_UD catch(Exception e){e.printStackTrace ();} Nn/f*GDvK } HxAN&g*: } 39yp1 #/,Wgs AC !T|q/ri //打印回应的头信息 X]1Q# $b public void logResponseHead(HttpURLConnection con) }Sx+: N* { uHQf <R$: for(int i=1;;i++) u3k{s { xHpB/P ~ String header=con.getHeaderFieldKey(i); c/'Cju W if(header!=null) `w(~[`F t //responseHeaders.put(header,httpConnection.getHeaderField(header)); Sb|9U8h Utility.log(header+" : "+con.getHeaderField(header)); >WZ_) `R else 6OPYq*| break; ,_iR } 2uEvu } O{{\jn|lR uD0<|At/ \UEO$~Km public void splitterStop() n5U-D0/Q { V4CL%i bStop = true; JVe!(L4H } q(XO_1W0V oro^'#ki DkA@KS1Dq } ,7/F?!G!J n#
4e1n+I `Ei:Z%@7C /* - %'ys **FileAccess.java F8pP(Wl *//文件访问(定位,写) .l:x! package NetFox; =U`9_]~1c@ import java.io.*; 4Q?3gA1 *RllKP Y) N3m~nEj public class FileAccessI implements Serializable{ "Nh}_jO j&|>Aa${ //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Z1Pdnc7S[ RandomAccessFile oSavedFile; K9=f`JI9 long nPos; zqlgJn zf.&E3Sn +d289" public FileAccessI() throws IOException ,&ld:v?~ { rk)h_zN this("",0); -VafN } Y7GHIzX @\?QZX(H "~,3gNTzV public FileAccessI(String sName,long nPos) throws IOException %SC%#_7 { 1$RUhxT oSavedFile = new RandomAccessFile(sName,"rw"); ;8iK] ;^ this.nPos = nPos; f2]O5rXp oSavedFile.seek(nPos); V+>.Gf } pRc<U^Z.h =%ry-n G P+gYLX8 public synchronized int write(byte[] b,int nStart,int nLen) N6<G`k, { \ sc's7 int n = -1; >mCS`D8 try{ egn9O oSavedFile.write(b,nStart,nLen); iZ;y( n = nLen; m[$pj~<\ } %<yH6h*u catch(IOException e) }HLV'^"k { )Q5ja}-{V e.printStackTrace (); |HfN<4NL } eZvG uD8,E!\ oeA}b-Ct0 return n; Jf3xK"in } <c_'(
SUaXm#9 c0.? d] } !McRtxq?~ `Qxdb1>mjY .?dYY;P /* vcz?;lg **SiteInfoBean.java 0UN65JBuD */ )ad6>Y package NetFox; T(q/$p&q w#w?Y!JXo ){FXonVP public class SiteInfoBean { u0i;vO)MNt w<$0n#5 4&_|myO& private String sSiteURL; //Site's URL *<#$B}!{ private String sFilePath; //Saved File's Path IRY/0v private String sFileName; //Saved File's Name
.H7xG'$ private int nSplitter; //Count of Splited Downloading File p`T,VU&. P+(q38f[ jImw_Q public SiteInfoBean() N}X7g0>hV {//nSplitter的缺省值为5 %WO4uOi:@ //default value of nSplitter is 5 #4wia%}u this("","","",5); r NT>{
} a8v9j3. f6U
i~ K;P<c,9X/ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) N*6lyFcg { Y:KIaYkk sSiteURL= sURL; %C=?Xhnv sFilePath = sPath; /PTk296@ sFileName = sName; r~Vb*~U" this.nSplitter = nSpiltter; [l:}#5\]4 7Ug^aA vfpK|=[7o }
y8/+kn + g>;u} +lO Nny#}k
Bt public String getSSiteURL() =DLVWz/< {
cFV3 return sSiteURL; ' "I-! + } 7CV}QV}G S0jYk ( qN@0k>11? public void setSSiteURL(String value) RDsBO4RG { HWOOw&^< sSiteURL = value; 1azj%WY } Gcp!"y=i "D[/o8Hk /A"UV\H`f public String getSFilePath() bd[%=5 { DQyy">]Mh return sFilePath; Lf0Wc'9{ } 1#
;`1i ^7,`6g {qbxiL- public void setSFilePath(String value) SioP`*,} { "e@?^J) sFilePath = value; VB&`g< } >8=rD 6o=Q;Mezl _n=,H public String getSFileName() -E,p[Sp { rls\3R(jt return sFileName; l#^weXSlk } "c*&~GSE4 r"_SL!,^ (^mpb public void setSFileName(String value) _}3NLAqg { 3JXKpk? sFileName = value; Kp?j\67S } tL}_kK_! .V.ga2+ *e%(J$t public int getNSplitter() Gf\u%S!% { 8}>s{u;W return nSplitter; 94b*
!Z } {~{</ g/ C)R#Om P?$Iht.^ public void setNSplitter(int nCount) d[$YTw { O#3PUuE%d nSplitter = nCount; f0]`TjY } r0j+P% } ' T%70)CM~ Ot([5/K $ i;_yTht /* x
A"V!8C **Utility.java ^gdv:[m */ 7?a!x$-U( package NetFox; E)]RQ~jY? >@uF ye$ B0$.oavC public class Utility { k.Q4oyei 6y
,;~@t:!c public Utility() E%vT(Kz { IW5N^J d6+{^v$# 5~\GAjf } |jJ9dTD8/ W $E Ao+V //线程睡眠 yR4++yk public static void sleep(int nSecond) _a-At { n2;Vrs,<1& try{ B(qwTz 51 Thread.sleep(nSecond); yYn7y1B } %w#8t#[,6 catch(Exception e) c'&\[b(m { #B&%Y6E5 e.printStackTrace (); 8rpr10;U } TT3\c,cs } 3&"+)*/ m r(DW,xoK0 //日志 `PI?RU[g* public static void log(String sMsg) f}uW(:f { ]Yx& System.err.println(sMsg); BfdS3VrZ/ } Xn*>qm 8Y&_X0T| 4M*!'sG\ public static void log(int sMsg) zsmlXyP'e! { Yrmd
hSY System.err.println(sMsg); PIZK*Lop } KAR **M p+ } #s3R4@{ JYO("f :BpXi|n; /* }E&48$0h **TestMethod.java MVOWJaT(Aq */ -i*]Sgese package NetFox; /j;HM[ erdA? #v}pn2g%> public class TestMethod { +5qY*$dn ,B,:$G< L#Rj~&U public TestMethod() 84f^==Y { ///xx/weblogic60b2_win.exe E4qQ try{ S- JD}+9 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); '-M9v3itC //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); VkZ3 Q7d
SiteFileFetch fileFetch = new SiteFileFetch(bean); re@;6o fileFetch.start(); EN;4EC7tE } :XCRKRDLE catch(Exception e){e.printStackTrace ();} eh}I?:(a? cs7K^D;.V G}#p4\/ } :[!b";pR ]Ia}H+ & NXSjN~aG2 public static void main(String[] args)
( =t41-l { |0xP'( new TestMethod(); OXD*ZKi8 } BT*{&'\/ } %hN7K 点击下载更多相关资料
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