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/* 3czeTj **SiteFileFetch.java
3G.5724, */ :tIC~GG]_) package NetFox; IDkWGh import java.io.*; *n]7 import java.net.*; \k;`}3uO ~$'\L Fc~'TBf,,` public class SiteFileFetch extends Thread { 'O5'i\uz
RZM"~ 0 D3|oOOoG SiteInfoBean siteInfoBean = null; //文件信息Bean QM3,'?ekRH long[] nStartPos; //开始位置 Cm$.<CV long[] nEndPos; //结束位置 h\plQ[T FileSplitterFetch[] fileSplitterFetch; //子线程对象 FMkOo2{ long nFileLength; //文件长度 {x'GJtpb boolean bFirst = true; //是否第一次取文件 +k
dT(7 boolean bStop = false; //停止标志 RoCfJ65 File tmpFile; //文件下载的临时信息 obdFS,JxxG DataOutputStream output; //输出到文件的输出流 y=In?QN{6* ??n*2s@t //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) /R>nr" public SiteFileFetch(SiteInfoBean bean) throws IOException USFDy { /C/id)h> siteInfoBean = bean; ;'81jbh //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); t){"Tfc: tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); IbcZ@'RSw if(tmpFile.exists ()) ; 7N
Z<k { dw.F5?j`b bFirst = false; G^q3Z#P read_nPos(); Vi4~`;|&b+ } Vd=yr'? else h" H2z1$ { ##Z_QB(; nStartPos = new long[bean.getNSplitter()]; w8g,a]p nEndPos = new long[bean.getNSplitter()]; AfG/JWSo} } VCtH%v#S;. FQ>`{%> aZEn6*0B [:^-m8QC } b)9'bJRvU ~rjTF! y^]tahbo public void run() 'ejvH;V3i { cUDoN`fSl, //获得文件长度 gKOOHUCb //分割文件 V138d?Mm //实例FileSplitterFetch V7TVt,-3 //启动FileSplitterFetch线程 hDV20&hq //等待子线程返回 z&V+#Ws/ try{ o[H{(f1% if(bFirst) 4(-bx.V { JWA@+u*k nFileLength = getFileSize(); K(XN-D/c if(nFileLength == -1) 9<Kj6t_ { D1nq2GwS System.err.println("File Length is not known!"); d~h:~ } >a3p >2 else if(nFileLength == -2) V5 U?F6 {
vSonkJ_ System.err.println("File is not access!"); :_Eqf8T } Jk0r&t7 else .rPn5D Y { wO2_DyMm@ for(int i=0;i<nStartPos.length;i++) nYbhy}y { $ "Bh]- nStartPos = (long)(i*(nFileLength/nStartPos.length)); pHoEa7: } 4nAa`(62 for(int i=0;i<nEndPos.length-1;i++) R0oKbs{ { :{(w3<i nEndPos = nStartPos[i+1]; $<ld3[l i } ~^+0 nEndPos[nEndPos.length-1] = nFileLength; W
d0NT@ } ]tY
^0a } Dde]I_f} M4xi1M#% N25V] //启动子线程 ;;A2!w{}[i fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 97)/"i e for(int i=0;i<nStartPos.length;i++) m[k_>e\u { 85;b9k&\M fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), GJqE!I,. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 9;xM% nStartPos,nEndPos,i); TNJG#8 n%Y Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); MQKfJru7 fileSplitterFetch.start(); .5!t:FPOv } uytE^ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Et_V,s<| siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 0| ;
.6\ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", K!,<7[MBg nEndPos = " + nFileLength); HK+/:'Pu // fileSplitterFetch[nPos.length-1].start(); jSc#+_y (@WA1oNG 0EJ(.8hwm //等待子线程结束 5JhdVnT_ //int count = 0; :NJ(r(QG> //是否结束while循环 US boolean breakWhile = false; hQNe;R5 .G o{1[ F7")]q3I~ while(!bStop) 5[n(7;+gw { gl&5l1& write_nPos(); r <
cVp^ Utility.sleep(500); 3Tq\BZ breakWhile = true; ^9-&o Y?534l)j Mc!Xf[ for(int i=0;i<nStartPos.length;i++) ,C {*s$ { fh^lO ^ if(!fileSplitterFetch.bDownOver) -7!&@wuQ { #Km:}= breakWhile = false; {647|j;e break; y$<Vha } t tXjn } L,;D@Xi if(breakWhile) N N|u _ break; ];%0qb KsrjdJx, ' 2YuN~- //count++; %&
_V0R\k //if(count>4) c]B$i*t // siteStop(); <5=JE*s$NS } /*Qq[C *-s,.
F+c OiDhJ System.err.println("文件下载结束!"); (Z5##dS3 } @E.k/G!~Nb catch(Exception e){e.printStackTrace ();} ) _ I,KEe } #.[AK_S5& 8.bKb<y JY!l!xH(6 //获得文件长度 7=]i~7uy public long getFileSize() ,
*qCf@$I { +\Q?w?DE| int nFileLength = -1; =uDgzdDyE try{ <}6{{&mT4 URL url = new URL(siteInfoBean.getSSiteURL()); Jgu94.;5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 1c+]gIe httpConnection.setRequestProperty("User-Agent","NetFox"); {YUIMd!Y !EQ@#qW/ 3sCFHn#c int responseCode=httpConnection.getResponseCode(); 5X.e*; if(responseCode>=400) fJZp?e" { 0b91y3R+ processErrorCode(responseCode); (Toq^+`c return -2; //-2 represent access is error d*pF> j } wB>r(xQ' L!_ZY ;v String sHeader; ;V<iL? DP/J(>eG
$hxNhI for(int i=1;;i++) }bU8G ' { ``ekR6[ 8c //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); *Ywpz^2?: //Utility.log(in.readLine()); T!W~n
ZC sHeader=httpConnection.getHeaderFieldKey(i); R_sC! - if(sHeader!=null) 2wqk,c[] { .lhn;*Yi if(sHeader.equals("Content-Length")) ^[Cv26 { ~7!7\i,Y8\ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); v&FF|)$ break; yk2 !8 } 97!>%d[0 } z'p:gv] else l8K5k:XCU3 break; 27ckdyQx } >MJ?g- } KNgH|5Pb catch(IOException e){e.printStackTrace ();} }B7K@Wu# catch(Exception e){e.printStackTrace ();} |_u8mV ^7]"kg DA fQ>4MKLw=d Utility.log(nFileLength);
QH]M hl&-\ dc+ g/=K. return nFileLength; t0:AScZY } 6I_Hd>4 -oz`"&% ^BZkHAp //保存下载信息(文件指针位置) bU 63X={ private void write_nPos() ,D6v4<jh { m\/(w_/? try{ vhr+g 'tf output = new DataOutputStream(new FileOutputStream(tmpFile)); }G$]LWgQx output.writeInt(nStartPos.length); U-wLt(Y< for(int i=0;i<nStartPos.length;i++) t)oa pIeIe { "x'), // output.writeLong(nPos); B@Nt`ky0* output.writeLong(fileSplitterFetch.nStartPos); h?\2_s output.writeLong(fileSplitterFetch.nEndPos); b=a!j=-D } ea=83 Zj output.close(); 'cDx{? } cD1o"bq catch(IOException e){e.printStackTrace ();} !e#xx]v3 catch(Exception e){e.printStackTrace ();} ihT~xt } URcR Uh.Zi3X6}6 }W)=@t //读取保存的下载信息(文件指针位置) 6)]f6p&e private void read_nPos() }wSi~^* { h!&sNzX try{ PU9`<3z5 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); `P+(&taT int nCount = input.readInt(); 0JRD nStartPos = new long[nCount]; 9+Y D!y nEndPos = new long[nCount]; 5H,G- for(int i=0;i<nStartPos.length;i++) #iSFf { r^$~>!kZ| nStartPos = input.readLong(); ]Pn!nSg nEndPos = input.readLong(); 09M;}4ev&7 } :&'{mJW*{t input.close(); |P6EO22p } /7$mxtB5%L catch(IOException e){e.printStackTrace ();} '!vc/Hw catch(Exception e){e.printStackTrace ();} $mco0%$ } MWuXI1 B'>*[!A {gf>* private void processErrorCode(int nErrorCode) 9CUimZ { z)F#u:t System.err.println("Error Code : " + nErrorCode); D_|B2gdZY } zW{ 6Eg w'Z!;4E0 |U[y_Y\a //停止文件下载 1TqF6`;+ public void siteStop() >3;^l/2c { o%(bQV-T bStop = true; <z#BsnjW{ for(int i=0;i<nStartPos.length;i++) hQh9ok8S fileSplitterFetch.splitterStop(); i8V0Ty4~N m^!Sv?hV eVnbRT2y& } 1czG55 | } 9n}A ^ //负责部分文件的抓取 5S/>l_od$2 **FileSplitterFetch.java G_oX5:J* */ :B#EqeI package NetFox; jOv"< `\FI7s3b <GW R7rUH import java.io.*; QJ4AL3
^6 import java.net.*; 6zYaA {*=E?oF@ ]UUI~sFE public class FileSplitterFetch extends Thread { GfsBQY/ ~"mj;5Id vnsSy 33K String sURL; //File URL BF|*"#s long nStartPos; //File Snippet Start Position Z*bC#s? long nEndPos; //File Snippet End Position )bW5yG! int nThreadID; //Thread's ID 7Jx%JgF boolean bDownOver = false; //Downing is over .w'vD/q; boolean bStop = false; //Stop identical g3rRhS FileAccessI fileAccessI = null; //File Access interface w??c1) oeNzHp_ :o\5K2]: public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `C<F+/q { T'R,vxP)\ this.sURL = sURL; :ej_D} this.nStartPos = nStart; =h\E<dw this.nEndPos = nEnd; ~L){O*Z nThreadID = id; + zDc fileAccessI = new FileAccessI(sName,nStartPos);//定位 .YiaXP } "A7<XN< G7Ny"{Z cj^bh public void run() /| f[us-w { ;Vo mFp L while(nStartPos < nEndPos && !bStop) 66dTs,C { \1{_lynD P CsK() CgoXZX try{ L<E/,IdE URL url = new URL(sURL); poY8
)2 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); qL>v&Rd< httpConnection.setRequestProperty("User-Agent","NetFox"); 'fl(N2t String sProperty = "bytes="+nStartPos+"-"; RO$*G
jQd httpConnection.setRequestProperty("RANGE",sProperty); ]+lF=kkc% Utility.log(sProperty); \4@a 'RQiLUF Loc8eToZ InputStream input = httpConnection.getInputStream(); +I.v!P!^ //logResponseHead(httpConnection); @SQceQfB '8={ sMy Fva]*5 byte[] b = new byte[1024]; S| "TP\o int nRead; PHl4 vh#E! while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) uH]
m]t { XC}1_VWs nStartPos += fileAccessI.write(b,0,nRead); :3gFHBFDj //if(nThreadID == 1) (k#t}B[ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); * 2%oZXF } [U']kt UhBz<>i;! #8E?^d Utility.log("Thread " + nThreadID + " is over!"); Hi7G/2t@` bDownOver = true; d1lH[r!Z //nPos = fileAccessI.write (b,0,nRead); "Y(%oJS]D } ]]3Q*bq4 catch(Exception e){e.printStackTrace ();} q!@c_o } DzE E:&*= } U-ULQ| 6U |QMT
A5 Y}ky/?q //打印回应的头信息 @QX4 \ public void logResponseHead(HttpURLConnection con) ME,duY/>Q { 8ur_/h7 for(int i=1;;i++) r.Lx%LZ\^ { sHF%=Vu String header=con.getHeaderFieldKey(i); '1lx{UzD if(header!=null) G-sa
L* //responseHeaders.put(header,httpConnection.getHeaderField(header)); cY^Y!., Utility.log(header+" : "+con.getHeaderField(header)); g.=!3e&z% else 6iyt2qkh break;
Jb6& } qWkx:-g] } W -3w7^ o=@ UXi Hj1k-Bs&'w public void splitterStop() W >Kp\tD { ;wpW2%& bStop = true; 0x6@{0 } }:"R-s ELD
+:b P0Aas)! } 83X/"2-K 75PS^5T, oX2r?.j#M /* )y5iH){! **FileAccess.java FmR\`yY_, *//文件访问(定位,写) lej^gxj/2 package NetFox; ]KzJ u`O%G import java.io.*; B piEAwh }&=uZ: 40rZ~!} public class FileAccessI implements Serializable{ "_Zh5
g mJ/^BT] //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 QK,=5~I J RandomAccessFile oSavedFile; C?bXrG\ long nPos; i^~sn `o v)TUg0U=,
$.=5e3 public FileAccessI() throws IOException &C\=!r0j^ { ;%M2x5 this("",0); [+yGDMLs } ,CN#co ?#x'_2 7Z9.z4\ public FileAccessI(String sName,long nPos) throws IOException "hJ7 Vv_ { {P,>Q4N oSavedFile = new RandomAccessFile(sName,"rw"); aS2a_!f this.nPos = nPos; 8U8P
g2 oSavedFile.seek(nPos); JB641nv } L)@`58Eil g6HphRJ5s T,A!5V>cX public synchronized int write(byte[] b,int nStart,int nLen) ~>lOl/n 5 { nqBG]y aI int n = -1; :LU"5g try{ !>?4[|?n< oSavedFile.write(b,nStart,nLen); JvT%R`i n = nLen; N;e}dwh& } /vMQF+ catch(IOException e) I=Gr^\x= { "tEj`eR e.printStackTrace (); \z&03@Sw } J{aQ1) tvGg@Xs\ hqdC9?\ return n; `8.1&fBr } 0-6:AHix SjFF=ib qQwJJjf } y^5T/M Zb12:? Cmp{F N"o /* R?1idl) **SiteInfoBean.java "6 uTo0 */ ee4KMS package NetFox; nNkyOaK*4 : Bdi pc @&/s~3 public class SiteInfoBean { 3U :YA&K( cg>!<T* k8!hvJ)? private String sSiteURL; //Site's URL UUt~W private String sFilePath; //Saved File's Path @2-Hj~ private String sFileName; //Saved File's Name s|fCR private int nSplitter; //Count of Splited Downloading File jAD+:@ m9\@kA z36brv<_'p public SiteInfoBean() -6.i\
B {//nSplitter的缺省值为5 {o Q(<&Aw //default value of nSplitter is 5 Yg\{S<wr this("","","",5); 5]A$P\7~1 } P]~N-xdV m^W*[^p ~N)( ^ 4 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) (MF+/fi { ^TuP=q5? sSiteURL= sURL; 44<9zHK sFilePath = sPath; bW,BhUb,| sFileName = sName; E#IiyZ this.nSplitter = nSpiltter; N>W;0u! 7C,<iY r{;VTQ } ~*,Ddwr0a uD0(aqAZ )&b}^1 public String getSSiteURL() LS R_x$G+t { ej)BR'* return sSiteURL; FF~on06! } OX#eLco o(v"?Y 6 &etL&s v public void setSSiteURL(String value) 0xvMR&.H {
ox i
a} sSiteURL = value; gNMKGf\Y } ^?sSsHz VuJfo9 `E e>ZbZy? public String getSFilePath() 0{^l2?mgSb { L@d]R MNv return sFilePath; :V5!C$QV } wI1M0@}PV Fyi?,, y{&{=1# public void setSFilePath(String value) |,M#8NOp: { T6/$pJl sFilePath = value; S\yu%=h } \S|VkPv i4{ / H`+]dXLB public String getSFileName() r-1yJ { B^_$
hJncc return sFileName; mlsvP%[f. } gavQb3EP p3,(*eZ ZYl-p]\*y public void setSFileName(String value) 6I5[^fv45G { )Ta]6 sFileName = value; YKs^%GO+ } \pBYWf @@&@}IQcR1 j:de}!wc public int getNSplitter() &\WkJ}&PnA { n{qa ]3 return nSplitter; "R\\\I7u } ^Yf)lV&[ dctA`W@:- (|ct`KU0# public void setNSplitter(int nCount) lyOrM7Gs { y<'2BTf nSplitter = nCount;
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} $Nt]${0 } #C=L^cSx( 2S7H_qo$ m\}\RnZu /* =oKPMmpCZ **Utility.java <Vr]2mw */ )P(d66yq'u package NetFox; ]VHdE_7) e5"-4udCn iBPdCp%]` public class Utility { tswG"1R iC5JU&l x9{Sl[2& public Utility() /FNj|7s { C7fi1~ !kHyLEV ,pGCgOG#}c } u1pYlu9IW VW<"c 5| //线程睡眠 NZw[.s>n
public static void sleep(int nSecond) J~yd]L> { *fuGVA try{ zM9) .D
H Thread.sleep(nSecond); 644hQW&W } AIRVvW~($ catch(Exception e) zvQ^f@lq2 { Sj]T{3mi e.printStackTrace (); MIua\:xT } m?kIa!GM= } 7Hr4yh[j& At^DY!3vx //日志 NGb!7Mu9 public static void log(String sMsg) S#%JSQo: { pFv[z':&Q System.err.println(sMsg); >/OXC+=^4 } Ph7(JV{
U%B]N@ C}DG'z9 public static void log(int sMsg) v,x%^gv 0 { ~M9n<kmE System.err.println(sMsg); \SH D } KSpC%_LC } :0TSOT9. xx`8>2T#e J!^~KN6[ /* OD@@O9 **TestMethod.java {/|8g( */ nD?M;XN package NetFox; $0`$)(Y k~s>8N:&G <K.C?M(9 public class TestMethod { $xn%i\ (=&bo p J/P@m_Yx public TestMethod() +EB,7<5< { ///xx/weblogic60b2_win.exe 1-Wnc'(OK try{ ?PxYS%D_L SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); J'Mgj$T $ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); IkXKt8`YVA SiteFileFetch fileFetch = new SiteFileFetch(bean); |EEz>ci fileFetch.start(); S
bqM=I+ } '>WuukC catch(Exception e){e.printStackTrace ();} YvP"W/5 o!_; H}pq Q j~W-^/ - } (9[C0e S [{!j9E?( $E@.G1T [ public static void main(String[] args) -9<yB { 4;~lpty new TestMethod(); 2.L6]^N p( } dgqJ=+z 0y } ^9V8 M9 点击下载更多相关资料
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