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/* T~4N+fK **SiteFileFetch.java yuhnYR\`m */ XYrJ/!*. package NetFox; )"+2Z^1- import java.io.*; $?P22"/p import java.net.*; 6#@ f'~s ])}(k cC'x6\a public class SiteFileFetch extends Thread { yR;{ Y>+y(ck N!2Rl SiteInfoBean siteInfoBean = null; //文件信息Bean nh>K`+>co long[] nStartPos; //开始位置 cV{o?3<:B long[] nEndPos; //结束位置 m3<+yz$!r FileSplitterFetch[] fileSplitterFetch; //子线程对象 oXXC@[??}N long nFileLength; //文件长度 2*iIjw3g boolean bFirst = true; //是否第一次取文件 $*R/tJ. boolean bStop = false; //停止标志 {0"YOS`3AX File tmpFile; //文件下载的临时信息 *%/~mSx DataOutputStream output; //输出到文件的输出流 ^-z=`>SrS" W ~f(:: //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) H<EQu|f&x public SiteFileFetch(SiteInfoBean bean) throws IOException \>QF(J [8 { GL{57 siteInfoBean = bean; /3 B
$( //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); re?s.djT tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ~{,X3-S_H if(tmpFile.exists ()) 6/V3.UP- { y:m_tv0~0 bFirst = false; e]=lKxFh&l read_nPos(); a^d8I } :j }fC8' else zOgTQs"ZH { 03E4cYxt5 nStartPos = new long[bean.getNSplitter()]; 4k-+?L!/G nEndPos = new long[bean.getNSplitter()]; YjOs}TD lx } ' Z0r>. jw<pK4?y 29CINC a]
= } jO*l3:!~ \ UhA"nt0 :+Om]#`Vls public void run() :0& X^]\ { k@ZLg9 //获得文件长度 YQJ==C1 //分割文件 yeDsJ/L //实例FileSplitterFetch ^V$Ajt //启动FileSplitterFetch线程 ivDGZI9 //等待子线程返回 ;{h CF try{ +6wiOHB` if(bFirst) ,C%eBna4Iq { EI!6MC) nFileLength = getFileSize(); < -W*$?^ if(nFileLength == -1) MUfG?r\t { Q'_z<V System.err.println("File Length is not known!");
`\Hf]b } A+hT3;lp else if(nFileLength == -2) $/!{OU.t` { H"ZZ.^"5FV System.err.println("File is not access!"); 5p.rwNE } 7qTE('zt else "BX! { EdZ\1'&/9 for(int i=0;i<nStartPos.length;i++) U- )i+}Ng { J{^RkGF nStartPos = (long)(i*(nFileLength/nStartPos.length)); E4m` } C4TE-OM8 for(int i=0;i<nEndPos.length-1;i++) Y"A/^] { UfS%71l.$ nEndPos = nStartPos[i+1]; p+)Y Tzzc } ~3uP6\F nEndPos[nEndPos.length-1] = nFileLength; V< k8N^ } C8z{XSo } o,|[GhtHqs [1.+HyJ} >4t+:Ut: //启动子线程 UTXSeNP fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; OS8q( 2z?s for(int i=0;i<nStartPos.length;i++) (?nCyHC%g { 0RoU}r@z4 fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ^Q+g({
siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), /0Ax*919j nStartPos,nEndPos,i); Z+@2"%W Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); E Cyyl fileSplitterFetch.start(); U8
nH;}i } +TXX$)3% // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), "etPT@gF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); j~*L~7 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 8#vc(04( nEndPos = " + nFileLength); / X1 x // fileSplitterFetch[nPos.length-1].start(); _a1x\,R|DB N<~ku<nAU O{#=d //等待子线程结束 F_CYYGZ //int count = 0; +SwR+H)? //是否结束while循环 JQ"U4GVp boolean breakWhile = false; ~6p[El#tS JH7< T#>7ub while(!bStop) *QH28%^ { ynbuN x* write_nPos(); t. ;LnrY Utility.sleep(500); ~?(N breakWhile = true; r?/'!!4 -\C!I i-6Z"b{ for(int i=0;i<nStartPos.length;i++) 2k=#om19 { <i,U )Tt^C if(!fileSplitterFetch.bDownOver) A{A\RSZ0 { ?!+MM&c-n breakWhile = false; [UH||qW break; NX}<*b/ } R6(oZph } 9g<7i if(breakWhile) EKO[ !, break; AB4(+S*LA :8OZ#D_Hl M]J^N# //count++; HPZ}*m' //if(count>4) Ftr5k^! // siteStop(); ')$+G152 } 4qk9NK2 U ml+; Rmvb %
yw?s0 System.err.println("文件下载结束!"); a24"yT } o7$'cn catch(Exception e){e.printStackTrace ();} !4X
f~P } I"ok&^t^} f.9SB
p9x(D/YP0 //获得文件长度 5rU[Tir public long getFileSize() :>C2gS@ { 0.@&_XTPl int nFileLength = -1; "/wyZ try{ y2^Y/)
URL url = new URL(siteInfoBean.getSSiteURL()); =o$sxb
E( HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); +8Rg F httpConnection.setRequestProperty("User-Agent","NetFox"); VcXq?f>\ ()6wvu} 32`{7a3!= int responseCode=httpConnection.getResponseCode(); V)[@98T_4? if(responseCode>=400) j3{D^|0bP { yjF1}SQ processErrorCode(responseCode); N u<_} return -2; //-2 represent access is error $adbCY\ } 6V7B;tB )!P)U(*v :qd`zG3 String sHeader; T[g[&K1Y 5?]hd*8 ,)vDeU for(int i=1;;i++) _I:/ZF5 { f,kZ\Ia'r //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); ']2E {V //Utility.log(in.readLine()); ;6>2"{NW sHeader=httpConnection.getHeaderFieldKey(i); ]7Tkkw$ if(sHeader!=null) YTUZoW2 { 7+\+DujE$ if(sHeader.equals("Content-Length")) =4FXBPoQK { xHD=\,{ig nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 2#c<\s|C break; OCBgR4I } JzQ )jdvp } uM_wjP else @`q:IIgW break;
EK6:~ } Bu#VMkchJ } 6\g cFfo catch(IOException e){e.printStackTrace ();} 7$CBx/X50) catch(Exception e){e.printStackTrace ();} HTX?,C_ 5kCUaPu v|dBSX9k0 Utility.log(nFileLength); wea-zN b4[bL2J$h1 U:^PC
x` return nFileLength; --$
4Q(# } ;DFSzbF` 21K>`d\ `4=^cyt+ //保存下载信息(文件指针位置) 1_PoqD!q private void write_nPos() ;:\<gVi: {
<G|(|E1 try{ >\KNM@'KI output = new DataOutputStream(new FileOutputStream(tmpFile)); u{['<r;I output.writeInt(nStartPos.length); UQ?XqgUM for(int i=0;i<nStartPos.length;i++) Ya3C#= { F8jd'OR // output.writeLong(nPos); -p]1=@A<} output.writeLong(fileSplitterFetch.nStartPos); I|gB@|_~ output.writeLong(fileSplitterFetch.nEndPos); &$`P,i 1) } F \KjEl0 output.close(); vq(0OPj8r[ } aX)I3^ar catch(IOException e){e.printStackTrace ();} gG<~-8uQ catch(Exception e){e.printStackTrace ();} M2OIBH4! } !dyXJQ <>y;.@}Q mr*JJF0Z //读取保存的下载信息(文件指针位置) ON=@O private void read_nPos() 7%Gwc?[x { J??-j try{ J:CXW%\ <q DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); K1 EynU
I int nCount = input.readInt(); I>]oS(GNT nStartPos = new long[nCount]; [>8}J" nEndPos = new long[nCount]; k/#&qC>] for(int i=0;i<nStartPos.length;i++) #`CA8!j!! { f$e[u
Er nStartPos = input.readLong(); 7puFz4+f nEndPos = input.readLong(); ObVGV } X[]m _@ v input.close(); G_bG } We$:&K0 catch(IOException e){e.printStackTrace ();} n}F&1Z catch(Exception e){e.printStackTrace ();} 3!XjtVhK?I } de.&`lPRf Dz>^IMsY %b&".mN private void processErrorCode(int nErrorCode) l{I6&^!KS { ($au:'kU
System.err.println("Error Code : " + nErrorCode); Cl;oi}L } Rdvk
ml@@ vQosPS_2L I`-8Air5f //停止文件下载 Q sZx)
bO public void siteStop() dP#|$1 { JD)(oK%C bStop = true; <*16(!k0 for(int i=0;i<nStartPos.length;i++) {> eXR?s/ fileSplitterFetch.splitterStop(); mn, =i }zkHJxZgE Jj!vh{ } I4/8 _)b^ } "6MVvpy" //负责部分文件的抓取 QdT}wkX **FileSplitterFetch.java z>58dA@f */ N60rgSzI package NetFox; _4"mAPt }Lc-7[/ R.jIl@p import java.io.*; sF!($k;! import java.net.*; G_;)a]v8) Sj]T
!\nBh public class FileSplitterFetch extends Thread { 2D75:@JL}| xHL( !PF 7!@-*/|!S9 String sURL; //File URL EYtL_hNp}I long nStartPos; //File Snippet Start Position 4 !i$4 long nEndPos; //File Snippet End Position wQqb`l7+ int nThreadID; //Thread's ID .{ocV#{s boolean bDownOver = false; //Downing is over jF ^~p9z boolean bStop = false; //Stop identical msP{l^%0 FileAccessI fileAccessI = null; //File Access interface UtPLI al !}YAdZJ {P*pkc public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException [B+yyBtx { JJP08oP this.sURL = sURL; S>h;K` this.nStartPos = nStart; ]$ L| this.nEndPos = nEnd; 'n{Nvt.c nThreadID = id; 7&t-pv92* fileAccessI = new FileAccessI(sName,nStartPos);//定位 <'qeXgi } {@eJtF+2 1C<uz29 >p)MawT] public void run() l1T m`7} { 7E!IF>` while(nStartPos < nEndPos && !bStop) ^8 z R { rf
$ QxJ (U&tt]| Li!Vx1p;u. try{ 4" Cb/y3 URL url = new URL(sURL); "S8uoSF`> HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "fG8?)d; httpConnection.setRequestProperty("User-Agent","NetFox"); n!YKz"$ String sProperty = "bytes="+nStartPos+"-"; !TAlBkj httpConnection.setRequestProperty("RANGE",sProperty); f%SZg!+t Utility.log(sProperty); DK$X2B"c V JLnH&(O RHmgD;7` InputStream input = httpConnection.getInputStream(); >"|B9Woc //logResponseHead(httpConnection); I;e=0!9U \n$u)Xj~6^ ,5i` -OI byte[] b = new byte[1024]; W#^2#sjO int nRead; 0t Fkd while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ^A!Qc=#z} { ;T"zV{;7BR nStartPos += fileAccessI.write(b,0,nRead); _"E%xM*r //if(nThreadID == 1) E)TN,@% // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 6VS4y-N } ~D<IB#C D&od?3}E .n#@$
nGZ Utility.log("Thread " + nThreadID + " is over!"); T ?$:'XJ bDownOver = true; 5]NqRI^0 //nPos = fileAccessI.write (b,0,nRead); {9?Jj A } uD}2<$PP catch(Exception e){e.printStackTrace ();} fmQ_P.c } iL7DRQ1 } R9'b-5q 0+?7EL~ OBMTgZHxv //打印回应的头信息 kO,zZF& public void logResponseHead(HttpURLConnection con) V}J)\VZ2# { <vUbv for(int i=1;;i++) Z3#P,y9@ { U}6B*Xx' String header=con.getHeaderFieldKey(i); 6ys
&zy if(header!=null) 4A8;tU$& //responseHeaders.put(header,httpConnection.getHeaderField(header)); G'oG</A Utility.log(header+" : "+con.getHeaderField(header)); S0B|#O%Z else 4,sJE2"[9 break; ]Y%Vio } 9`1O"R/ } .LZwuJ^; ).Fpgxs 43|XSyS public void splitterStop() 4[.oPK=i { 4[;X{ ! bStop = true; F<L
EQ7T
} ZG>PQA V,mw[Hw }j^i}^Du, } N9jH\0nG kddZZA3` 7Nk!1s: /* }RzWJ@QD< **FileAccess.java xC{qV, *//文件访问(定位,写) xfpa]Z package NetFox; ,5|&A import java.io.*; **$LR<L )we}6sE" v:!Z=I}> public class FileAccessI implements Serializable{ A;*d}Xe&J S#MZV@nGF //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 PMNjn9d RandomAccessFile oSavedFile; M!/Cknm long nPos; ]!I7Y.w6 $*AYcy7 n&"B0y cF public FileAccessI() throws IOException P,xKZ{( { +_; l|uhT; this("",0); -n=^U } Ont%eC\ `}(b2Hc> Jz7!4mu public FileAccessI(String sName,long nPos) throws IOException e8pG"`wM8 { F ~^Jmp7Y oSavedFile = new RandomAccessFile(sName,"rw"); qyF{f8pzq this.nPos = nPos; luo oSavedFile.seek(nPos); '^No)n\` } O_ChxX0KP QWD'!)Zb -*$HddD public synchronized int write(byte[] b,int nStart,int nLen) L\@I*QP { UJM1VAJ0 int n = -1; V8rx#H~ try{ fDT%! oSavedFile.write(b,nStart,nLen); W8ouO+wK n = nLen; `-(|>5wWS } :pGaFWkvO catch(IOException e) Ove<mFI\ { l|/ep:x8 e.printStackTrace (); 7s/u(~d) } .@(6 Y<dN Y"~gw~7OD ^lA=* jY( return n; ~F4fFQ-yy } qAn! Rk A pi
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5OE cki81bOT } >4#)r8;dx Y0x%sz5 y9x w
9l' /* `8AR_7i **SiteInfoBean.java hp#W9@NR */ %k;|\%B` package NetFox; (Tn- >).AO 0w)^) l:j4Ft 8 public class SiteInfoBean { N'^&\@)xiU In18_bc U.DDaT1 private String sSiteURL; //Site's URL M%ICdIc' private String sFilePath; //Saved File's Path 6^eV"&+@ private String sFileName; //Saved File's Name I aGq]z private int nSplitter; //Count of Splited Downloading File LIcM3_. lu<xv 0`X]o'RxS public SiteInfoBean() q35f&O; {//nSplitter的缺省值为5 7]blrN] //default value of nSplitter is 5 4)A#2 this("","","",5); ,Wk?I%> } ]j`c]2EuP ~:Ll&29i SKkUU^\#R` public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) j`~Ms> { kQEy#JQmB sSiteURL= sURL; tasUZ#\6 sFilePath = sPath; BW 4%l sFileName = sName; 9{
>Ui this.nSplitter = nSpiltter; .P[ _<8 Cj{1H([- }+C2I } KY51rw. :I+Gu*0WD xa <UM5eI public String getSSiteURL() n)^i/ nXb' { uI1q>[ return sSiteURL; XCU7xi$d } "|q qUKJZ orWbU
UC ;[M}MFc/` public void setSSiteURL(String value) 7Rd'm'l) { {bJ`~b9e sSiteURL = value; 4nh>'v%pD } >`A9[`$n n:yTeZ=-s4 ;c4gv,q@ public String getSFilePath() &Low/Y'.jJ { KG|n return sFilePath; }a/x._[s } J&.{7YF PIdikA xI($Uu}S public void setSFilePath(String value) /5Oa,NS7 { 1*9U1\z sFilePath = value; ki?S~'a } d$ x"/A]< gm igsXQ gG*X^Uo public String getSFileName() ZWc]$H? { ykV
5 return sFileName; 05b_)&4R } 57umx`m jRJn+ 0n;<
ge&~R public void setSFileName(String value) CG Y]r.O* { -f% ' sFileName = value; q*_/to } %oZ6l* Mxyb5h glM$R &/ public int getNSplitter() 7UVzp v { s$Z
_48 return nSplitter; l49*<nkmq } .Le?T&_ WtG~('g>& @+Si?8\ public void setNSplitter(int nCount) BJM.iXU)[ { `*_mP<Ag nSplitter = nCount; [lWQ'DZ } lDYyqG4 } VF?<{F [RLN;(0n =5/9%P8j9 /* 8<8:+M} **Utility.java pTPi@SBaP{ */ lI *o@wQg package NetFox; = \'}g? n
`&/D :N4t49i public class Utility { Z4S!NDMm~ ~<_2WQ/$ *h!28Ya(~ public Utility() W6?pswQ { v"b+$* }1Gv)l7 1*'HL# } *>|gxM8 @D{KdyW //线程睡眠 oU056 public static void sleep(int nSecond) g!lWu[d { $Tu61zq try{ iV'k}rXC Thread.sleep(nSecond); N/%WsQp } /178A;Jy catch(Exception e) H*ow\
Ct { 'p>Ra/4 e.printStackTrace (); mZSD( } _jLL_GD } o]yl;I QZ6D7tUc8 //日志 pR(jglm7- public static void log(String sMsg) NidIVbT.A { v|uAzM{73 System.err.println(sMsg); tnH2sHby } "e.jZcN* 7
n8"/0kc: fI&t] public static void log(int sMsg) U>]$a71 { _I@9HC 4 System.err.println(sMsg); Fv~20G(O } <0b)YJb4M } c~z82iXNO l`oZ)?ur )bS yB29S /* ~Sj9GxTe **TestMethod.java sDPs
G5q< */ |TS>hwkI package NetFox; '[AlhBX w>pq+og& \-h%O
jf4 public class TestMethod { `uOT+B%R \MyLc/Gh5 11o.c; public TestMethod() vdAr|4^qB { ///xx/weblogic60b2_win.exe #|L8tuWW try{ +R3k-' > SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 39:bzUIF //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); >V-A;S: SiteFileFetch fileFetch = new SiteFileFetch(bean); [@VP?74 fileFetch.start(); */sS`/Lx } ojcA<60
' catch(Exception e){e.printStackTrace ();} 8aK)#tNWN eD,.~Y#?= _zY#U9 } &dqLP95 C _'%NlJ' .+PI}[g public static void main(String[] args) &S~zNl^m { z* ^_)Z new TestMethod(); tr<Nm6! } Hx"ob_^'7 } nV"~-On 点击下载更多相关资料
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