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/* *'ffMnSZ **SiteFileFetch.java 1@W*fVn */ :qe.*\
c package NetFox; ?hh#@61
import java.io.*; z<u*I@; import java.net.*; Xdtyer% EwX:^1f bD ADFitSo public class SiteFileFetch extends Thread { :.bBV]6q tR`^c8gD F9PXQD( SiteInfoBean siteInfoBean = null; //文件信息Bean = Y`e?\#` long[] nStartPos; //开始位置 Lsb` ,: long[] nEndPos; //结束位置 FX,kmre3 FileSplitterFetch[] fileSplitterFetch; //子线程对象 h51)kN: long nFileLength; //文件长度 O@-|_N*;K boolean bFirst = true; //是否第一次取文件 Sxzt|{ boolean bStop = false; //停止标志 {
d |lN:B File tmpFile; //文件下载的临时信息 W|-<ekH_u DataOutputStream output; //输出到文件的输出流 p%ZOLoc)Y 5BRZpCb //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ' |Ia-RbX public SiteFileFetch(SiteInfoBean bean) throws IOException e` {F7rd: { }2+*E}g siteInfoBean = bean; T7qE
2 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); O'[r,|Q{ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ;*[oi if(tmpFile.exists ()) 8RaRXnJ { LzGSN bFirst = false; T6M=BkcP read_nPos(); 9L7jYy=A# } l:- <CbG else ~;/}D0k$x { .hVB)@/ nStartPos = new long[bean.getNSplitter()]; "l[ c/q[ nEndPos = new long[bean.getNSplitter()]; +b_o2'' } 4RyQ^vL ,LftQ1*; U]}f]GK >#[,OU} N } o/4U`U)Q0v y1Op Z _?rL7oTv public void run() He)vl. { 9gQ
]!Oq //获得文件长度 A(6n- zL //分割文件 Pe?=M[u2 //实例FileSplitterFetch 7;r Jr&.) //启动FileSplitterFetch线程 &<oJw TC //等待子线程返回 ywY[g{4+ try{ mZ0'-ax
if(bFirst) Q nmv?YXS { `RHhc{ nFileLength = getFileSize(); C7Ny-rj}IA if(nFileLength == -1) Gph:'3
*X { ?M9?GodbP. System.err.println("File Length is not known!"); JrNqS[c/ } pKNrEq else if(nFileLength == -2) *iiyU}x { _>RTefL5 System.err.println("File is not access!"); 6x iCTs0@ } _;'<}a else w{89@ XRC { Z# o;H$ for(int i=0;i<nStartPos.length;i++) Bv{DZ?{s { =.(~`ici~ nStartPos = (long)(i*(nFileLength/nStartPos.length)); ;Q\MH t* } 6Ij'z9nJw for(int i=0;i<nEndPos.length-1;i++) ;Z!x\{-L { 9^g?/8 nEndPos = nStartPos[i+1]; I4(z'C } 2F#DJN# nEndPos[nEndPos.length-1] = nFileLength; +<rWYF(ii/ } pKkBAr, } 1w} DfI T
)!kJ;vc uy rS6e0 //启动子线程 w^E$R fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; HyC826~-rI for(int i=0;i<nStartPos.length;i++) @&9 ,0x { RfQ*`^D fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), TxP8&!d siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), _"h1#E nStartPos,nEndPos,i); ICD;a Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); -jk-ve fileSplitterFetch.start(); =`E{QCW } Ft<B[bQ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), :rSCoi>K siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ~%!"!Z4 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ",
|Sr
nEndPos = " + nFileLength); ('1]f?:M // fileSplitterFetch[nPos.length-1].start(); "'*Qq@!3? W0k7(v) m8<.TCIQ //等待子线程结束 %`\=qSf* //int count = 0; Wa<SYJ //是否结束while循环 Lk2;\ D> boolean breakWhile = false; "U|u-ka8B :wY(</H v{;^>"5o while(!bStop) P2fiK { Kr%w"$< write_nPos(); J936o3F_ Utility.sleep(500); tJII-\3" breakWhile = true; J0FJ@@ L XHDX h@jk3J9^ for(int i=0;i<nStartPos.length;i++) d8J(~$tXQN { guk{3<d:Jy if(!fileSplitterFetch.bDownOver) q);@iiJ- { zbAyYMtEk
breakWhile = false; Mz: "p. break; S!8q>d,%L } !SdP<{[ } 8A: =#P^O\ if(breakWhile) :&J1#% t break; ,'%*z pM}n)Q!{3" '.*`PN5mDq //count++; #ba7r
]Xu //if(count>4) ?wpl
88z // siteStop(); ImsyyeY] } ypWhH -\~HAnh ~;vt{pk System.err.println("文件下载结束!"); >D_!d@Z } Q(jIqY1Hf catch(Exception e){e.printStackTrace ();} A`nzqe#(1 } =3|5=ZU034 h3j`X' Oid;s!-S 6 //获得文件长度 O
#5`mo public long getFileSize() r#NR3_@9 { sI`oz|$ int nFileLength = -1;
j>A=Wa7 try{ |Ge!;v URL url = new URL(siteInfoBean.getSSiteURL()); ?*:BgaR_ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 1pM>-"a8j httpConnection.setRequestProperty("User-Agent","NetFox"); BHpj_LB-P r#B{j$Rw
juEH$7N! int responseCode=httpConnection.getResponseCode(); $GQ{Ai:VwF if(responseCode>=400) />O.U? { FL[w\&fp processErrorCode(responseCode); Zb:S
IJ return -2; //-2 represent access is error ]%Lk#BA@A } KqvM5$3 ld7B{ ?] kiu#THF String sHeader; ^zKP5nzL H=6-@+ !o jH[{V[<#X for(int i=1;;i++) 7~H"m/;U& { Q1RUmIe_& //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ,'byJlw_pv //Utility.log(in.readLine()); zcOG[- sHeader=httpConnection.getHeaderFieldKey(i); q OV$4[r if(sHeader!=null) VLC=>w\, { <x1,4a~ if(sHeader.equals("Content-Length")) #YK=e&da { tS[%C) nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); E&0]s break; naM=oSB( } Qn \=P*j } Z9zsvg else ~Gh9m]b break; ,e{1l } WD|pG;Gq } X4/3vY catch(IOException e){e.printStackTrace ();} Kza5_7p`L catch(Exception e){e.printStackTrace ();} _uZVlu@ +<'>~lDg hy"=)n( Utility.log(nFileLength); YbJB.;qK r
TK)jxklX Vkl]&mYRz return nFileLength; rQ)I } /gP"X1. m0 ]Lc{ 1 Ay.^f //保存下载信息(文件指针位置) KNSMx<GP private void write_nPos() $u,
~183 { p*|Ct try{ 8r.3t\o)X output = new DataOutputStream(new FileOutputStream(tmpFile)); Yq%r\[%* output.writeInt(nStartPos.length); Ur(< ] for(int i=0;i<nStartPos.length;i++) RpzW- { 6A-nhvDP // output.writeLong(nPos); QxiAC>%K output.writeLong(fileSplitterFetch.nStartPos); i}~U/.P
output.writeLong(fileSplitterFetch.nEndPos); \N.Bx
} 'h>CgR^NM1 output.close(); gP?.io9Oi } wj\kx\+ catch(IOException e){e.printStackTrace ();} \;0UP+ catch(Exception e){e.printStackTrace ();} }T"&4Rvs2R } v\-7sgZR KA
elq* VujIKc#4 //读取保存的下载信息(文件指针位置)
m">2XGCn private void read_nPos() i)@H { `Gh#2U try{ ,p6o "- DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); gt!tDu int nCount = input.readInt(); 7w?N-Q$y nStartPos = new long[nCount]; G],W{<Pe nEndPos = new long[nCount]; |t_SN,)dd for(int i=0;i<nStartPos.length;i++) Q\aC:68 { ),I g u nStartPos = input.readLong(); q}hHoSG]= nEndPos = input.readLong(); ADB,gap } v|:TYpku3 input.close(); nw=:+? } ZX0!BS catch(IOException e){e.printStackTrace ();} T_oL/x_; catch(Exception e){e.printStackTrace ();} M!
uE#| } lGX8kAv? K*N8Vpz( [q~3$mjQ private void processErrorCode(int nErrorCode) _aw49ag; { oI x!?,1 System.err.println("Error Code : " + nErrorCode); ]>,Lw=_[_ } ,Ofou8C6 GhW{6.^
d8VFa'| //停止文件下载 b\C1qM4 public void siteStop() 4GexYDk'# { `Lr|KuFN bStop = true; @O
HsM?nW for(int i=0;i<nStartPos.length;i++) Gy!bPVe fileSplitterFetch.splitterStop(); h/7_I uD a4eE/1 )
-@Dh6F } #g]eDU-[ } hv )d //负责部分文件的抓取 mf\@vI **FileSplitterFetch.java BHDd^bd */ x%55:8{ package NetFox; tF!-}{c"k S=3 H.D!f ,m;G:3}48 import java.io.*; E*83N@i import java.net.*; m>+e;5 /}=cv>S5V EkEQFd 5g public class FileSplitterFetch extends Thread { >7 qZ\# p&ZLd`[ S=X_7V
String sURL; //File URL yOyuMZo6 long nStartPos; //File Snippet Start Position Y|aaZ|+ long nEndPos; //File Snippet End Position |],ocAN{ int nThreadID; //Thread's ID jiP^Hz"e
boolean bDownOver = false; //Downing is over %R?#Y1Tq; boolean bStop = false; //Stop identical HQ^:5XH FileAccessI fileAccessI = null; //File Access interface o_PQ]1 D>K=D" K<fB]44Y public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 'V}4_3#q { 9 tIE+RD this.sURL = sURL; WP4"$W this.nStartPos = nStart; ,pa=OF this.nEndPos = nEnd; #A^(1 nThreadID = id; J;Eg"8x] fileAccessI = new FileAccessI(sName,nStartPos);//定位 g>-u9%aa } Yn8aTg[J $i$Z+-W4' U9h@1: public void run() >{#QS"J# { nw while(nStartPos < nEndPos && !bStop) -\M;bQV[C { xd^9R< R9InUX"k UKf0cU try{ I->4Q&3 URL url = new URL(sURL); ]SNcL[U HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); w'<"5F` httpConnection.setRequestProperty("User-Agent","NetFox"); S3?U-R^` String sProperty = "bytes="+nStartPos+"-"; 9/6=[) httpConnection.setRequestProperty("RANGE",sProperty); I|)U>bV Utility.log(sProperty); AHn
Yfxv_
z:JJ>mxV SHN'$f0Mb InputStream input = httpConnection.getInputStream(); }&LLo //logResponseHead(httpConnection); ^4{"h myDcr|j-a 8J8@0 byte[] b = new byte[1024]; N@\`DO int nRead; io*iA<@Gx while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Dh .<&ri
{ m]'P3^<{P nStartPos += fileAccessI.write(b,0,nRead); n!%'%%o2v //if(nThreadID == 1) X!f` !tZ:{ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 9oxn-)6JC } qp2&Z8S\D <>fT_ O
718s\# Utility.log("Thread " + nThreadID + " is over!"); w>6cc#>q bDownOver = true; q 1+{MPJ //nPos = fileAccessI.write (b,0,nRead); 4_h?E:sBb } KNqs=:i catch(Exception e){e.printStackTrace ();} X>ck.}F } '%[r 9w } iU?xw@WR v)rQ4
wD: 7oZtbBs]M //打印回应的头信息 p/'09FY+ U public void logResponseHead(HttpURLConnection con) Ll0"<G2t { !Bn,f2 for(int i=1;;i++) }Z8DVTpX} { L] !M1\ String header=con.getHeaderFieldKey(i); $;B0x if(header!=null) 9M1 UkS$`@ //responseHeaders.put(header,httpConnection.getHeaderField(header)); |M(0CYO Utility.log(header+" : "+con.getHeaderField(header)); Ae>:i7.V else utBKl'` break; @Jr@
fF} } )jed@? } XJZS}Z7h & _mp!&5XV YQ7tZl;:t public void splitterStop() E{}Vi>@V? { QZamf
lk bStop = true; e\'=#Hw } >2dF^cDE-3 MUvgmJsN =;y(b~ } R6-Z]Hu 3Tz~DdB [.c'22R6 /* >IE`, fe **FileAccess.java ($[)Tcq*~ *//文件访问(定位,写) F]6$4o[ package NetFox; W,ik ;P\ import java.io.*; %S]g8O[}nl w~}.c:B oO][X public class FileAccessI implements Serializable{ >PoVK{&y (K3eb //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 5nv1%48Ri RandomAccessFile oSavedFile; A,]%*kg2 long nPos; c,_??8 )@a_|q@V <K
GYwLk public FileAccessI() throws IOException Vc$y^|= { {q|Om?@ this("",0); EN{o3@ O' } ":V,&o9n @szr '&\%A .ly K
,p public FileAccessI(String sName,long nPos) throws IOException pW1(1M)[%Z { 8N9X1Mb| oSavedFile = new RandomAccessFile(sName,"rw"); ^2-t|E= this.nPos = nPos; *g!7PzJ' oSavedFile.seek(nPos); #D|n6[Y'.t } g~]?6;uu \TnRn(Kw %#iu public synchronized int write(byte[] b,int nStart,int nLen) pT'jX^BU { O7lFg;9c` int n = -1; -8m3L try{ yNOoAnGT W oSavedFile.write(b,nStart,nLen); 2C"[0*.[N n = nLen; s0*@zn>h } 67T=ku catch(IOException e) oxXCf%! { l" +q&3Zx e.printStackTrace (); @~8* } _BHEK tzrvIVD V?&P).5) return n; ]3]=RuQK2 } =SVb
k )%vnl~i! ch]{=61 } 'T(@5%Db 9A ?)n<3d 5]~451 /* ?tx."MZ **SiteInfoBean.java P$5K[Y4f */ QJ2D C package NetFox; /_</m?&.U&
()e|BFL . Fx )BMP public class SiteInfoBean { /X%+z5 ip!-~HNwJ }56WAP}Z 4 private String sSiteURL; //Site's URL Fs&r^ [/b private String sFilePath; //Saved File's Path b)@rp private String sFileName; //Saved File's Name q![`3m-d. private int nSplitter; //Count of Splited Downloading File B}0!b7! }/2M?W0 i>e?$H,/ public SiteInfoBean() z]R%'LGu {//nSplitter的缺省值为5 Q)=LbR{# //default value of nSplitter is 5 }CL7h;5N 3 this("","","",5); tE,&
G-jU } GA;h7 `T{'ufI4B LkXho>y public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Lg{M<Q)4 { qHnX) sSiteURL= sURL; 1Eb2X}XC sFilePath = sPath; nF$HWp> sFileName = sName; q _Z+H4 this.nSplitter = nSpiltter;
9}5o> iR V!/9GeIF rn/~W[ } HoK+g_9~ p<3<Zk 7~0 +lxjuEiae public String getSSiteURL() SDB \6[D { M.+h3<%^ return sSiteURL; <w`EU[y_ } $ ^@fV=e E^A S65%bL Ec@cW6g(% public void setSSiteURL(String value) FzNj':D { W^)mz,%x sSiteURL = value;
HQ]mDo } |Z)}-'QUJ ]|tR8`DGZ% d::9,~ public String getSFilePath() H]7bqr { "=1gA~T return sFilePath; @yo6w}3+- } wl&T9O;? 3dlY_z=0 v>j,8E public void setSFilePath(String value) b$yIM { %}e['d h sFilePath = value; uVKe ?~RC } S~)`{
\ <bb!BS&w ?|98Y"w public String getSFileName() 3n)$\aBE { FvY=!U06 return sFileName; *5.wwV } 1DcX$b mt$rjk= :9av]Yv& public void setSFileName(String value) ar#73f { 3E^qh03( sFileName = value; : NA(nA
3 } ZE-vroh yo/;@}g}
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$o@ public int getNSplitter() 1Y*k"[?dW { Kei0>hBi return nSplitter; |9=A"092{ } fLqjBG]< 3]GMQA{L) LWm1j:0 public void setNSplitter(int nCount) ]J'TebP=L5 { 5!fOc]]Ow nSplitter = nCount; Sc/l.]k+ } ah hl } LXh}U>a9 ge1. HG Jw8?o/1D@ /* ]95VMyN **Utility.java NIVR;gm */ NS2vA>n8R package NetFox; nAWb9Yk 38D5vT)n L7;~4_M9.V public class Utility { [U/h'A.j :>JfBJ]| ^;<d<V}* public Utility() hdCd:6 { d}zh.O5P!
&`@YdZtd" $QwpoVp`~ } Q&xH ~Ym_ { //线程睡眠 CTW\Dt5 public static void sleep(int nSecond) cJaA*sg { ;7qIm83 try{ TT/H"Ri}Jp Thread.sleep(nSecond); =Q40]>bpx } q+\<%$:u catch(Exception e) P?/JyiO} { 9>w~B|/ e.printStackTrace (); FHQ`T\fC$@ } TPJF?.le
' } `!Z?F]):G '~&W'='b; //日志 ?-<lIFFh public static void log(String sMsg) }6%XiP| { (T#$0RFq System.err.println(sMsg); I?}jf?!oM } KhfADqji| h'-4nu;* 'G l~P><e public static void log(int sMsg) MSQ^ovph { o'$"MC+ System.err.println(sMsg); *^|\#UIk
} g77M5(ME } ~dr,;NhOLJ U_"!\lI_yg dYrgL3' /* VQHB}Y@^ **TestMethod.java F)hj\aHm k */ /ovVS6Ai package NetFox; S{;Pga*Px b!@PS$BTxq ~r.R|f]IQ public class TestMethod { >n09K8
A TM(y%!\ Njg$~30 public TestMethod() P 0.cF]<m { ///xx/weblogic60b2_win.exe "TJu<O"2 try{ rpRyB9 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); =:s`C,l.4 //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); m>vwpRBOA SiteFileFetch fileFetch = new SiteFileFetch(bean); "V>}-G& fileFetch.start(); t<##0#xS. } Qjfgxy] catch(Exception e){e.printStackTrace ();} 8D )nM| w1)TnGT Z&n[6aV'F } T o["o!(;z TF/NA\0c$ ]#]Z]9w public static void main(String[] args) eK:?~BI! { {1Ra|,; new TestMethod(); h~ k<" } Gw<D'b)! } f#!+l1GV 点击下载更多相关资料
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