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/* L*SSv
wSL **SiteFileFetch.java d~P<M3#> */ i_jax)m% package NetFox; #NVF\ import java.io.*; =: v>< import java.net.*; VDb,$i.Z0 8VAYIxRv T9U2j-lA? public class SiteFileFetch extends Thread { E9Qd>o D:RBq\8 /z.7:<gZ( SiteInfoBean siteInfoBean = null; //文件信息Bean {8*d;[X50 long[] nStartPos; //开始位置 [EW$7 se~ long[] nEndPos; //结束位置 Npf7 p FileSplitterFetch[] fileSplitterFetch; //子线程对象 %Mb(
c+7 long nFileLength; //文件长度 .5#tB*H boolean bFirst = true; //是否第一次取文件 e!2%k u boolean bStop = false; //停止标志 $jUS[.S_|I File tmpFile; //文件下载的临时信息 f3%^-Uy*b DataOutputStream output; //输出到文件的输出流 +UpMMh q ` + n //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Zh fD`@>& public SiteFileFetch(SiteInfoBean bean) throws IOException 6Mf3)o2 { fa*H cz siteInfoBean = bean; ,:dEEL+>c //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); a2klOX{ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); qk+{S[2j if(tmpFile.exists ()) ?( dYW7S { F`ZIc7(.{ bFirst = false; ]L%R[Z!3 read_nPos(); '%]@a7w } C&CsI] @g else +{=_|3( { \+evZ{Pu nStartPos = new long[bean.getNSplitter()]; 3A}nNHpN nEndPos = new long[bean.getNSplitter()]; j~,LoGuPh } zb~MF_ &gE Kt!IyIa;Ht 5E oWyy HHu7{, } sP3.s_U^ _WjETyh
[H vxilQp public void run() L->f=
8L { *3etxnQc //获得文件长度 ek;&<Z_ ] //分割文件 BJ.8OU*9]S //实例FileSplitterFetch ,Dii?P //启动FileSplitterFetch线程 :(?hLH.W[ //等待子线程返回 0Z);.l^ try{ h,WY2Hr if(bFirst) +GPT:\*q6 { r~D~7MNl nFileLength = getFileSize(); e
ka@?` if(nFileLength == -1) >$S,>d_k` { yzM+28}L<I System.err.println("File Length is not known!"); eE.5zXU3R } KZ<RDXV T else if(nFileLength == -2) YaJ{"'} { Vw;ldEdx System.err.println("File is not access!"); c]>&6-;rf } &6^W%r else :2UC{_ { `d|bH;w for(int i=0;i<nStartPos.length;i++) &fd4IO/O { kFIB lPV nStartPos = (long)(i*(nFileLength/nStartPos.length)); ng&EGM } ?#EXG for(int i=0;i<nEndPos.length-1;i++) J"2ODB5" { FG5c:Ep nEndPos = nStartPos[i+1]; HT,kx } WO(&<(? nEndPos[nEndPos.length-1] = nFileLength; C"Y]W-Mgg } 3Llj_lf } Zqs-I8y L]}RSE2 2bn@:71` //启动子线程 P7k$^n fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; k@";i4}A for(int i=0;i<nStartPos.length;i++) Rn~Xu)@e { ME10dr fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), _hyxKrm'
6 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), aEqI51I nStartPos,nEndPos,i); n40MP5RxY Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); lKhh=Pc2 fileSplitterFetch.start(); SX=0f^ } <sCq
x/L // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), !E:Vn *k; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); %Rsf6rJ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", =Wy`X0h nEndPos = " + nFileLength); wAOVH]. // fileSplitterFetch[nPos.length-1].start(); nM.?Q}yO~ Nj-rZ%& :k )<1ua //等待子线程结束 eZod}~J8 //int count = 0; ocuVDC //是否结束while循环 UrcN? boolean breakWhile = false; PUZXmnB aCi^^}!
pOI`,i}. while(!bStop) >eTgP._ { $E,DxDT write_nPos(); 2SPFjpG8n Utility.sleep(500); =O'%)Y& breakWhile = true; fYQi#0drn i`nw"8 ryp$|?ckJ for(int i=0;i<nStartPos.length;i++) Ce'2lo { . nF if(!fileSplitterFetch.bDownOver) kq.h\[ { AW&s-b%P breakWhile = false; l
75{JxZX break; O-lh\9{'R } 07"Oj9NlA } W]}V<S$ if(breakWhile) ;ld~21#m break; a={qA4N I;Fy
k70w; "gikX/Co= //count++; I nK)O'; //if(count>4) V\`=" // siteStop(); wYMX1= } *n_4Rr 8Gg/M%wq9U ZUJOBjb`
K System.err.println("文件下载结束!"); c2mt<DtWW } g7LW?Ewr catch(Exception e){e.printStackTrace ();} ,Ve@=< } Cl.T'A$ N5Mz=UgB j4SGA#;v //获得文件长度 Bt7v[Ot
public long getFileSize() 10 H! { k Q(y^t W int nFileLength = -1; )$4DH:WN try{ EEZ2Gu6c URL url = new URL(siteInfoBean.getSSiteURL()); 71&+dC HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); gG;W:vR}l httpConnection.setRequestProperty("User-Agent","NetFox"); to|9)\ RZh)0S>J 4bzn^ int responseCode=httpConnection.getResponseCode(); w]-iM if(responseCode>=400) htrj3$q(4 { 9x{prCr processErrorCode(responseCode); +vSE} return -2; //-2 represent access is error ~%:p_td }
F-,{+B66 @CI6$ GiwA$^Hg\ String sHeader; _1c_TM h}9 V"jnrNs3
5g>kr<K for(int i=1;;i++) >b?)WNk { z ;Nk& <? //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); R./ 6Q1 //Utility.log(in.readLine()); {1DYXKe sHeader=httpConnection.getHeaderFieldKey(i); jF_I4H if(sHeader!=null) ",V5*1w { iQ"F`C if(sHeader.equals("Content-Length")) ~WXxVm*@ { }V;]c~Q/H nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); K.1yncS^ break; slfVQ809 } (b}7Yb]#c } H^:|`T|, else O~'yP@&` break; J\D3fh97- } bu&y w~ } X2?_lZ[\ catch(IOException e){e.printStackTrace ();} a`iAA1HJ catch(Exception e){e.printStackTrace ();} W(4?#lA2W " z'!il# BQ0\+ Utility.log(nFileLength); :Ia&,;Gc =T}uQ$X J4 #]8!A return nFileLength; xumv I{ }
"1Aus 8mLU ~P
| (#M$t!'% //保存下载信息(文件指针位置) G@!9)v]9 private void write_nPos() 1^^D :tt { S
Tk#hhx try{ >D62l*V C) output = new DataOutputStream(new FileOutputStream(tmpFile)); 1tz .e\ output.writeInt(nStartPos.length); 1u+(rVQN for(int i=0;i<nStartPos.length;i++) fGWK&nONyk { T["(YFCByg // output.writeLong(nPos); P[ 8N58# output.writeLong(fileSplitterFetch.nStartPos); nn%xN\~< output.writeLong(fileSplitterFetch.nEndPos); D~&e.y/gHN } &~f_1< output.close(); bR,Iq}p } JhIK$Ti catch(IOException e){e.printStackTrace ();} p;=(-4\V} catch(Exception e){e.printStackTrace ();} (k&aD2PH } 0*@S-Lj^c D +""o"% 5K~6` //读取保存的下载信息(文件指针位置) Ib2pV2`h( private void read_nPos() |R/50axI { AB\4+ CLV try{ n5>N9lc DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ZS_f',kE int nCount = input.readInt(); Z"+!ayA7D nStartPos = new long[nCount]; oF
xVK nEndPos = new long[nCount]; k"{U}Y/} for(int i=0;i<nStartPos.length;i++) V7_??L%Ct` { <5~>.DuE nStartPos = input.readLong(); 4HE4e nEndPos = input.readLong();
+'.Q- } hj,x~^cS input.close();
|?A-?- } 0+pJv0u catch(IOException e){e.printStackTrace ();} I0RWdOK8K catch(Exception e){e.printStackTrace ();} dxWw%_Q } =
g}yA=. =LnAMl#9 ]]3D`
F} private void processErrorCode(int nErrorCode) -1JHhRr] { u`|fmVI System.err.println("Error Code : " + nErrorCode); A,qG*lv } B4aZ3.&W 3/FB>w gt Kjw\SQ)2~ //停止文件下载 hhhO+D1( public void siteStop() e r$ 'c { GK&Dd"v bStop = true; E76:}( for(int i=0;i<nStartPos.length;i++) BUyA] fileSplitterFetch.splitterStop(); --kK<9J7 sKO
;p )zo ;r!eP } '%N)(S`O7P } KL4/"$l] //负责部分文件的抓取 Q@n k T1o **FileSplitterFetch.java "g-NUl`' */ !&[4T#c package NetFox; N<99K! Z]BRMx gBu4`M import java.io.*; lV'83 import java.net.*; =w-H ) EA.U>5Fq &=bI3- public class FileSplitterFetch extends Thread { 2-84 mX^RSg9 E} zn|}YovY+ String sURL; //File URL 5Y^YKV{ long nStartPos; //File Snippet Start Position )3sb2
# long nEndPos; //File Snippet End Position mN02T@R- int nThreadID; //Thread's ID za7wNe(s boolean bDownOver = false; //Downing is over _wCSL. boolean bStop = false; //Stop identical W6Pg:Il7 FileAccessI fileAccessI = null; //File Access interface C.<4D1}P X)m2{@v D \ua.%| public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException g\'sGt3 O { 2|BE{91 this.sURL = sURL; -;}Wm[
this.nStartPos = nStart; 6EY4@0%A this.nEndPos = nEnd; c&&UT-Z nThreadID = id; #Gx@\BE{ fileAccessI = new FileAccessI(sName,nStartPos);//定位 X;h~s:LM
}
y1X.Mvc ~_%[j8o&l pG&.Ye]j public void run() M .,|cx { 2uIAnbW]M while(nStartPos < nEndPos && !bStop) FhGbQJ?[3 { Q*:
Ow] *F0N'* iQF93:# try{ 9[Mu URL url = new URL(sURL); jLTs1`I/F HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); D$HxPfDZ httpConnection.setRequestProperty("User-Agent","NetFox"); zeX?]@]Y String sProperty = "bytes="+nStartPos+"-"; GCHssw~P'v httpConnection.setRequestProperty("RANGE",sProperty); .+yJ'*i$d Utility.log(sProperty); <FEO6YP 71_N9ub@z q9Q4F InputStream input = httpConnection.getInputStream(); Q"O _h //logResponseHead(httpConnection); A\`Uu& G1rgp>m dkjL;1 byte[] b = new byte[1024]; Jp- hFD int nRead; }R^{<{KVJ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) {`VQL 6(i
{ h.nz kp5 nStartPos += fileAccessI.write(b,0,nRead); !?{5ET,gtN //if(nThreadID == 1) N*fN&0r // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?=/l@ d }
VMp6s%m +Ji dP *L=CJg Utility.log("Thread " + nThreadID + " is over!"); v&Kw
3!X#E bDownOver = true; eC?N>wHH //nPos = fileAccessI.write (b,0,nRead); /1*\*<cs } _N6GV$Q catch(Exception e){e.printStackTrace ();} ~&kV } TUG3#PSnm* } Mtu8zm x)*[>d2yd rlD@O~P4 //打印回应的头信息 Ch3##- public void logResponseHead(HttpURLConnection con) 8QU`SoS9 { EOL03N for(int i=1;;i++) Jy9&=Qh { 3I]5DW %- String header=con.getHeaderFieldKey(i); ]#`bYh^y if(header!=null) j.o)!SA //responseHeaders.put(header,httpConnection.getHeaderField(header)); y^ohns5{ Utility.log(header+" : "+con.getHeaderField(header)); 7L)edR[ else BWRAz*V break; iZm#
"}VG } 4LO4SYW7 } YW9r'{(D(I B8_)I. WZ,}]D public void splitterStop() Vz_ac
vfk^ { dp;;20z bStop = true; IsP-[0it } J8IdQ:4^l P5-1z&9O 0se0AcrW } x\0(l5> j=c=Pe"?u jT/}5\ /* ;J[ed>v;3 **FileAccess.java /q[5-96c *//文件访问(定位,写) <j\osw1R package NetFox; max 5s$@ import java.io.*; {P/ sxh:e
/,Unp1D *WTmS2?'h public class FileAccessI implements Serializable{ *XN|ZGl/ [=/Yo1:v //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 9NzK1V0X RandomAccessFile oSavedFile; ;6+e !h'1 long nPos; =T7lv%u pAK7V;sJ PH!^ww6
public FileAccessI() throws IOException zt,Tda4Y { j`H5S this("",0); e
*9c33 } -!_\4 .0ov>4,R -O&u;kh4g public FileAccessI(String sName,long nPos) throws IOException U-h'a:
K { ^v2-"mX< oSavedFile = new RandomAccessFile(sName,"rw"); Dqxtc|vo this.nPos = nPos; A8|DB@Bi oSavedFile.seek(nPos); nrFuhW\r } J]h$4" {Tr5M o ko7*9` public synchronized int write(byte[] b,int nStart,int nLen) [l`_2{: { >{/As][ int n = -1; lRO7 Ae try{ %KjvV<f-a oSavedFile.write(b,nStart,nLen); :6h$1
+6 n = nLen;
WRdBL5 } $~^Y4 }
m catch(IOException e) <t~RGn3 { k 'CM^,F& e.printStackTrace (); P
}BU7`8 } fC4#b?Q Nd;)V lhk=yVG3 return n; 8?yRa{'" } WSi`KNX :NCY6?
[Dz s8O.yL } (Ci{fY6` !<EQVqj6 pwIu;:O!? /* At t~NTL **SiteInfoBean.java A vh"(j */ &7 0o4~Fr package NetFox; ~k(4eRq 3AQu\4+A a ](Jc) public class SiteInfoBean { 2bnF#-( DTx!# [ (9!/bX< private String sSiteURL; //Site's URL Q`0 k=< private String sFilePath; //Saved File's Path dRhsnT+KX private String sFileName; //Saved File's Name s3Wjg private int nSplitter; //Count of Splited Downloading File 0`H)c)
pP eV"Za.a. U??T> public SiteInfoBean() =!R+0 {//nSplitter的缺省值为5 arQEi //default value of nSplitter is 5 vG2&qjY1 this("","","",5); :c?}~a~JO( } U%PII>s'# Y%GIKtP fR^aFT public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) :nLhg$wMs { Yw!(]8PYdU sSiteURL= sURL; >}I BPC sFilePath = sPath; Ho^rYz sFileName = sName; 2a,l;o$2& this.nSplitter = nSpiltter; n){F
FM )@hG #KMK ^Gt9. } n !oxwA! _=g;K+%fb GEd JB= public String getSSiteURL() 2D vKW%; { HLruZyN4 return sSiteURL; J]"IT*-Ht } C)H1<Br7 &pk&8_=f 4Yx\U public void setSSiteURL(String value) 13f@Ox$ { z>&|:VGG sSiteURL = value; CHGV1X, } 9{(A- qiyX{J7Z wMx#dP4W8 public String getSFilePath() wU $j/~L { rL9u7)x return sFilePath; I<}<!.Bc! } 24; BY' 4xl}kmvv
up^D9(y\ public void setSFilePath(String value) [(d))(M$| { w1q` sFilePath = value; 8~6H\.0Q } AzlZe\V?)~ &?wNL@n *$6dN x public String getSFileName() 2*5]6B-( { +T,Yf/^Fn return sFileName; 8
mFy9{M } [>#@?@x`P +C8yzMN\ y<0RgG1qp public void setSFileName(String value) fvH4<c5x { /ZpwJc`e sFileName = value; m&&Y=2 } 4eh~/o&h 83[gV@LW0m 9=FqI50{ public int getNSplitter() >dU.ic?19 { .9'bi#:Cw return nSplitter; Zp'q;h_ } t7; ^rk* c1>:|D7w WNo",Vc public void setNSplitter(int nCount) ~REP@!\r^ { D$&LCW#x nSplitter = nCount; ~bsL
W:.' } CA8N } 8-.jf X) O9PQ : l&g5 /* A."]6R< **Utility.java YZllfw$9 */ 9~Ve}NB#z& package NetFox; Ee0}Xv `=FDNOwp y'#i'0eeL public class Utility { PrwMR_- -s5>GwZt 2"IsNbWV public Utility() hF4gz*Q { E2%{?o 27CVAX ghV 898=9`7e } \'[C_+;X 5<=ktA48[ //线程睡眠 W%,h{ public static void sleep(int nSecond) FsTl@zN {
J~=tR1k try{ 23_\UTM}1 Thread.sleep(nSecond); Dc;zgLLL } 78n`VmH~L catch(Exception e) ^PrG5|,s { x |0@T ? e.printStackTrace (); YI!@,t } p+7ZGB } KvtX>3#qM PD$@.pib //日志 iLR^ V! public static void log(String sMsg) PEIf)**0N { KsR^:_e System.err.println(sMsg); lQ!)0F } hO H
DXc" v[t*CpGd Q/u1$&1 public static void log(int sMsg) Bq
9Eu1 { m:4Ec>?e System.err.println(sMsg); c*:H6(u } ?jy6%Y#,i }
ek9Y9eJ" uL1$yf' ![}q9aeT /* ,LpG E>s **TestMethod.java P S [ifC */ s?-J`k~q package NetFox; 25m6/Y Sru}0M#M W2-1oS~ma public class TestMethod { BH+@!H3hf d4[mR~XXT ^Ox|q_E
w} public TestMethod() LkA_M'G { ///xx/weblogic60b2_win.exe U)B^R try{ a-(OAzQ_ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); hnD=DLW $ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); S{. G=O SiteFileFetch fileFetch = new SiteFileFetch(bean); uU;]/ fileFetch.start(); N sNk
} 8 "5^mj catch(Exception e){e.printStackTrace ();} ;wF 0s t.YY?5l `:y { } DuV@^qSbG. AQR/nWwx "oc&uj public static void main(String[] args) QO|roE { lf?dTPrD new TestMethod(); OqNtTk+ } J=@D]I*3 } ']cRSj. 点击下载更多相关资料
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