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/* hUp3$4w **SiteFileFetch.java 2,B^OZmw */ \8a014 package NetFox; !=;Evf import java.io.*; ?wmu0rR import java.net.*; qkc,93B3 I
Gb'ii=A %jq
R^F:J public class SiteFileFetch extends Thread { [a$1{[|) xOg|<Nnl *kF/yN SiteInfoBean siteInfoBean = null; //文件信息Bean i>G:*?a long[] nStartPos; //开始位置 rk,64( long[] nEndPos; //结束位置 V_v+i c^ FileSplitterFetch[] fileSplitterFetch; //子线程对象 wod{C ! long nFileLength; //文件长度 >.C$2bW<L boolean bFirst = true; //是否第一次取文件 r
z@%rOWV boolean bStop = false; //停止标志 v[x 5@$ File tmpFile; //文件下载的临时信息 #3?"#),q DataOutputStream output; //输出到文件的输出流 Ue,eEer 23p.g5hJi //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) e*(
_Cvxp public SiteFileFetch(SiteInfoBean bean) throws IOException =yqg,w&Q { jamai8 siteInfoBean = bean; rc%*g3ryLG //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); u|EJ)dT? tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); E6G;fPd= E if(tmpFile.exists ()) ]>sMu]biH { Sqmjf@o$> bFirst = false; Y%]g,mG read_nPos(); 6~s{HI! } e*Nm[*@UW else MfLus40;n { l{ fL~O nStartPos = new long[bean.getNSplitter()]; SFsT^f< nEndPos = new long[bean.getNSplitter()]; sZqi)lo-s } G~*R6x2g aOoWB^;6 [czWUD :t+LuH g } 5HvYy
*B/ O,J,Q|`H& T%}x%9VO7 public void run() cx)x="c { l~kxK.Ru //获得文件长度 GBd
mT-7 //分割文件 /~<Przw //实例FileSplitterFetch J(XK%e[8 //启动FileSplitterFetch线程 }zeKf/?' //等待子线程返回 #]} G{
P try{ m Ub2U&6( if(bFirst) V+*1?5w { D{[i_K nFileLength = getFileSize(); SnO,-Rg if(nFileLength == -1) yAel4b/} { iqXsDgkr System.err.println("File Length is not known!"); A#79$[>w } z5[Qh<M else if(nFileLength == -2) *q Ins/@ { gp{P _ System.err.println("File is not access!"); hJ Jo+NNN } *K=me/
3 else rIH+X2x { k1FG$1. for(int i=0;i<nStartPos.length;i++) <*{(> { #xrE^Txh nStartPos = (long)(i*(nFileLength/nStartPos.length)); a4!6K } FC8=
ru for(int i=0;i<nEndPos.length-1;i++) _Q\u-VN*hv { !un_JZD nEndPos = nStartPos[i+1]; umiD2BRZ } P$;_YLr nEndPos[nEndPos.length-1] = nFileLength; 04z2gAo } !r0 z3^*N } F8Z6Ss|v3 TUd=qnu W}oAgUd //启动子线程 VoUAFEcs fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; C?b_E for(int i=0;i<nStartPos.length;i++) g\,HiKBXd { \3z ^/F~ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ( e(<4-& siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), }*0*8~Q'5 nStartPos,nEndPos,i); Yr+ghl/ V Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); +wr
5& fileSplitterFetch.start(); 9D mQ } RFm9dHI27 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), D#&N?<} siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); gLv";"4S // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", .J|"bs9 nEndPos = " + nFileLength); ^`!EpO>k9 // fileSplitterFetch[nPos.length-1].start(); o"A%dC_ YPav5<{a P}Ul e|&LK //等待子线程结束 5 %aT //int count = 0; $;+`sVG //是否结束while循环 o//PlG~ boolean breakWhile = false; T k>N4yq $yg}HS7HC !7[Rhk7bW while(!bStop) dCMWv~> { l.i&.;f write_nPos(); C{):jH,Rf Utility.sleep(500); y#;@~S1W breakWhile = true; V?Zvu9b& 0IjQqI "Mmvf'N for(int i=0;i<nStartPos.length;i++) /!0{9F< { jCbxI^3A if(!fileSplitterFetch.bDownOver) :j,e0#+sA { t%<d}QuHW breakWhile = false; zc-.W2"Hu break; J;BG/VI1 } e c`3Qw } :ITz\m if(breakWhile) <)(STo break; xlaBOK a% wXsA-H/` QFf lx //count++; dPRGL
hWF //if(count>4) e[8p /hId // siteStop(); 7uRXu>h } a|@^N . RNQlh3 'rdg System.err.println("文件下载结束!"); Nl1v*9_x } Jk7[}Jc$ catch(Exception e){e.printStackTrace ();} vg1p{^N! } E8Wgm
8 )f0t"lk !Hr
+|HKQ? //获得文件长度 v 1O*
Q public long getFileSize() T=2 91)@ { x3my8'h@ int nFileLength = -1; U;4:F{3m
try{ 8ESBui3; URL url = new URL(siteInfoBean.getSSiteURL()); ,Tyh._sa HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); `7|v httpConnection.setRequestProperty("User-Agent","NetFox"); <H~ (iQ l+Tw#2s$ `r iK[@ int responseCode=httpConnection.getResponseCode(); |L7
`7!Z if(responseCode>=400) TlZ|E '_C { S-:l
60. processErrorCode(responseCode); 3&-BO%i return -2; //-2 represent access is error kf$0}T` } t{K1ht$[: */RtN`dh Jh[fFg] String sHeader; %c(':vI# y_8 8I:O X4Eq/q" for(int i=1;;i++) A=|&N%lP' { Wel-a<
e //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); *A O/$K@Ma //Utility.log(in.readLine()); <$HP"f+<S5 sHeader=httpConnection.getHeaderFieldKey(i); ?E2/
CM if(sHeader!=null) U)+Yh { 5>JrTO5 if(sHeader.equals("Content-Length")) $}7/mS@c { #IyxH$ nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); m4|9p{E break; Jpws1~ } {cKKTDN } KyNv)=x4c else +=^10D break; ]Z@-r } 7\K=8G } >ZuWsA0q catch(IOException e){e.printStackTrace ();} {(AYs*5 catch(Exception e){e.printStackTrace ();} uG2Hzav J(VJMS;_ c:4M|t= Utility.log(nFileLength); *K'(t `$7j:<c= O!kBp(?] return nFileLength; vWcU+GBZI } TB4|dj-% R-"A*/A 2 @%fNB,H` //保存下载信息(文件指针位置) Y dmYE$ private void write_nPos() <MI>>$seiJ { \L(~50{( try{ pog*}@OS output = new DataOutputStream(new FileOutputStream(tmpFile)); KE`}P<K& output.writeInt(nStartPos.length); ]4yWcnf for(int i=0;i<nStartPos.length;i++) B{lBUv(B { V,fSn:8%M // output.writeLong(nPos); egxh output.writeLong(fileSplitterFetch.nStartPos); sME3s- output.writeLong(fileSplitterFetch.nEndPos); U`D/~KJ{Y } q<yp6Q3^ output.close(); $uF}GP_) } >Q#_<IcI catch(IOException e){e.printStackTrace ();} lzN\~5a} catch(Exception e){e.printStackTrace ();} AF>J8 V } fn(KmuNA |[;9$Vn +HQX]t:Y
//读取保存的下载信息(文件指针位置) Ua)ARi % private void read_nPos() B)O{+avu { (hS
j4Cp try{ Tf)qd\ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); K 38e,O int nCount = input.readInt(); )'KkO$^& nStartPos = new long[nCount]; iVLfAN @ nEndPos = new long[nCount]; r'#5ncB for(int i=0;i<nStartPos.length;i++) r1yz ?Y_P { M3c-/7 nStartPos = input.readLong(); h.E8G^}@ nEndPos = input.readLong(); /\V-1 7- } (PE x<r1 input.close(); 8hZ+[E} } @-Tt<pl'L catch(IOException e){e.printStackTrace ();} 8<z+hWX=4 catch(Exception e){e.printStackTrace ();} 1~Zmc1] } 'kf]l=i[n E4GtJ`{X }9<pLk private void processErrorCode(int nErrorCode) N?TXPY { EaaQC]/OX5 System.err.println("Error Code : " + nErrorCode); 85+'9#~! } _SC{nZ[ )HQ':ZE$ >
L_kSC? //停止文件下载 sa$CCQ public void siteStop() lk]q\yO_% { eW,{E)x: bStop = true; HjAhz for(int i=0;i<nStartPos.length;i++) 4t]ccqX*{ fileSplitterFetch.splitterStop(); 'hN_H}U mN?y\GB N"1o>
! } d(9ZopJrQ } y_boJ //负责部分文件的抓取 L_3Ao'SA **FileSplitterFetch.java $L7Z_JD5 */ k ! l\|~ package NetFox; tBC`(7E} v1h\
6r' \H^DiF%f9 import java.io.*; r==d^ import java.net.*; IcRA[
g d$qivct Vea2 oQq public class FileSplitterFetch extends Thread { =jXBF. g<pr(7jO uF,F<%d String sURL; //File URL /9T.]H~ long nStartPos; //File Snippet Start Position _)-t#Ve long nEndPos; //File Snippet End Position 3m%oXT int nThreadID; //Thread's ID C+o1.#]JM boolean bDownOver = false; //Downing is over n-zAkKM boolean bStop = false; //Stop identical T% 74JRQ FileAccessI fileAccessI = null; //File Access interface ~(i#A> >-U'mkIH 3L}eFg,d public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException '.
5&Z { +~xY} this.sURL = sURL; s^f7w this.nStartPos = nStart; K#Ia19au5 this.nEndPos = nEnd; yp}J+/PX} nThreadID = id; QS7<7+ fileAccessI = new FileAccessI(sName,nStartPos);//定位 wW &q)WOi } hOFC8 g O0^m_ )Fk*'6 public void run() 9o%k [n { e1cqzhI=nA while(nStartPos < nEndPos && !bStop) HiAj3 { tVfZ~qJ )
uM*`% 6Qtyv try{ jW]Q- URL url = new URL(sURL); BoJpf8e'-e HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Td,2.YMQ httpConnection.setRequestProperty("User-Agent","NetFox"); zF:
:?L~ String sProperty = "bytes="+nStartPos+"-"; M%&1j >d httpConnection.setRequestProperty("RANGE",sProperty); +;r1AR1)x Utility.log(sProperty); U]/iPG&_ "x1?T+j4 mIW8K
): InputStream input = httpConnection.getInputStream(); 75v7w //logResponseHead(httpConnection); N+lhztYQ? eX`wQoV% }2xgm9j< byte[] b = new byte[1024]; e= { ?d6 int nRead; BD.&K_AW while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) arK(dg~S { 3Z0ez?p+5 nStartPos += fileAccessI.write(b,0,nRead);
4,g_$) //if(nThreadID == 1) \
-n&z;` // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); z
}3 `9 } t@X{qm:%Z 8'WoG]E_ r+=%Ag Utility.log("Thread " + nThreadID + " is over!"); oYx4+xH/ bDownOver = true; Ml,~@}
p //nPos = fileAccessI.write (b,0,nRead); --OAsbr } ^8.s"4{ catch(Exception e){e.printStackTrace ();} h`i*~${yg } n4XEyCrD } u@]rR&h` b=@H5XTZyK w{8O$4
w //打印回应的头信息 g)dKXsy(F public void logResponseHead(HttpURLConnection con) Xsk/U++ { `.i #3P for(int i=1;;i++) >o:y.2yCe { / jLb{Ky String header=con.getHeaderFieldKey(i); ]hMs:$} if(header!=null) g3|k- //responseHeaders.put(header,httpConnection.getHeaderField(header)); B_DyH
C\< Utility.log(header+" : "+con.getHeaderField(header)); h
?_@nQ! else xiv8q/ break; Vp$<@Y } @[LM8 @: } nt:ZO,C:R :(A k: HXm&` public void splitterStop() 3>>Ca;>$ { KzZfpdI92 bStop = true; ilRPV'S^ } /'4]"%i%3 -e\OF3Td ]FNe&o1zX } $b U.6
bV$g]->4e xLdkeuL[% /* _TwEym.V **FileAccess.java /Qu<>#[? *//文件访问(定位,写) L,yq'>*5s package NetFox; 5{gv\S1 import java.io.*; -G[TlH06 lT?Vt`==~M wZ5k|5KtW public class FileAccessI implements Serializable{ ! FVD_8 RD6>\9 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 /H?) qk RandomAccessFile oSavedFile; 4`Cgz#v
{ long nPos; zr ~4@JTS '/s/o]'sUd }0Q
T5 public FileAccessI() throws IOException |J"\~%8 { *5u3d`bW this("",0); wwN kJ+ } c!kz wc( %x./>-[t +TW,!.NBG public FileAccessI(String sName,long nPos) throws IOException fh*7VuAc { hzk4SOT( oSavedFile = new RandomAccessFile(sName,"rw"); xyP0haE this.nPos = nPos; },=ORIB B: oSavedFile.seek(nPos); N(e>]ui } a51}~V1 )j QrD` iu9+1+- public synchronized int write(byte[] b,int nStart,int nLen) QYj*|p^x { Y
.E.(\ int n = -1; ]DUmp6 try{ QFB2,k6jN oSavedFile.write(b,nStart,nLen); _VB;fH$ n = nLen; 4j}.=u* X7 } @X2 zIFm catch(IOException e) ?AVnv(_ { A 4*D3\>%u e.printStackTrace (); D;h JK-Y } 6>3zD)tG de9e7.(2 zjTCq; G return n; E9 w"?_A) } IrIW>r} - l*Q OM V`0Y
p } iA|n\a~ny, hh$i1n 4}Y? :R /* L'$({ **SiteInfoBean.java = Qn8Y`U */ r3Kx package NetFox; /g1;`F(MS/ ~<}?pDA}~ o{' JO3 public class SiteInfoBean { ?k=)T]-} YkQ=rurE 9 ge'Mo private String sSiteURL; //Site's URL lmIphOUoIw private String sFilePath; //Saved File's Path u`XZtF<vf private String sFileName; //Saved File's Name #'m#Q6` private int nSplitter; //Count of Splited Downloading File Pz|}[Cx- 3*F|`js" &?I3xzvK public SiteInfoBean() BwYR" {//nSplitter的缺省值为5 *c(J4 //default value of nSplitter is 5 s]HJcgI this("","","",5); Gx|/
Jq } S] 4RGWn r!^VCA ?'>[nm public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) <J]N E|: { a~k*Gd( sSiteURL= sURL; l xP!WP sFilePath = sPath; {M23a
_t\ sFileName = sName; 'N&s$XB, this.nSplitter = nSpiltter; X;{U? `b- ;T<'GP'/r mp0s>R }
=T$2Qo8 BOl*. t P#/s5D8
public String getSSiteURL() Q@TeU#2Y { &!*p>Ns)e return sSiteURL; >p3S,2SM } }]pO R&o 0a+U >S# C?rb}(m public void setSSiteURL(String value) ']sIU;h3 { "77l~3 sSiteURL = value; 2bf#L?5g/ } Ut(BQM>U+$ "-Uqv@ @ 3b- public String getSFilePath() cMfnc.P\K { bR=TGL& return sFilePath; Z"G?+gM@ } j[w5#]&% nB |fw" n* z;%'0 public void setSFilePath(String value) xQ=L2pX { ,f
.#- sFilePath = value; kCKCJ}N } v8THJf UmCIjwk ([ hd public String getSFileName() |H8UT SX+ { qjR p5 return sFileName; Z-i$KF } a]x\e{ Csm23QLsg) FFc?Av?_ public void setSFileName(String value) z\<gm$1CB { 8=3$U+ sFileName = value; -<5H8P- } d`KW]HJw ={nuz-3 -:V2Dsr6; public int getNSplitter() f q*V76F { 68!=`49r> return nSplitter; Z15b'^)?9 } 4hV~
ir ulXe;2 KkZ o|\V public void setNSplitter(int nCount) D]Gt=2\NG9 { `"|u
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nSplitter = nCount; ="[6Z$R } m6
a@Y< } Va\?"dH>M B=2f-o +'D
#VG /* "\kr;X' **Utility.java D?cE$P */ n4EZy<~m package NetFox; J]Qbg7| [M:BJ%* D^2yP~( public class Utility { 7A>glZ/x _+nlm5 o
n?8l?iQ public Utility() b.v^:M { 9,Ug (2%z9W @RS|}M^4 } CA ,0Fe3 J_ `\}55n //线程睡眠 B ? D|B public static void sleep(int nSecond) nL*
SNQ_ { ,m.IhnCV\ try{ !CuLXuM Thread.sleep(nSecond); i9y&<^<W } Y&`nB,' catch(Exception e) btU:=6 { @c{b\is2 e.printStackTrace (); o*|j}hnbv } 2;=xHt } <7sGA{ 4O3-PU>N //日志 g R)
)K) public static void log(String sMsg) l050n9#9p { $Z^HI System.err.println(sMsg); . vQCX1V( } T=->~@5 C9FQo7 8Dy;'BtT public static void log(int sMsg) k-\RdX)E { }KwL_\>&f System.err.println(sMsg); mw&)j R$& } /CN`U7:E } [P746b_\e )k|_ CW~ ]Syr{| /* AIFI@#3 **TestMethod.java 6'qC *r */ m%km@G$ package NetFox; TwXqk>J uVw|fT -?68%[4lm_ public class TestMethod { -.X-02 <Xr{1M D P ||:?3IH public TestMethod() 'rQ>Z A_8 { ///xx/weblogic60b2_win.exe :;]iUjiC8 try{ &?#G)suP SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); \4OX]{ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ?ydqmj2[F SiteFileFetch fileFetch = new SiteFileFetch(bean); 6S#e?>"+ fileFetch.start(); `aW>h8$I) } u4a(AB>S catch(Exception e){e.printStackTrace ();} 8/dx)*JCq u:f.g?!`" 5L4{8X0X8 } 3KW4 ]qo~ gK8{ =A0c zn'F9rWx> public static void main(String[] args) F"<TV&xf { &{c.JDO new TestMethod(); hf~'EdU } OWRT6R4v } G&HCOR!h 点击下载更多相关资料
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