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/* d+IPa<N **SiteFileFetch.java OE[/sv */ b#]in0MT?@ package NetFox; JZ c5U}i import java.io.*; Y0b.utR& import java.net.*; *in_Zt3 |MRxm"]A
$@U`zy"Y public class SiteFileFetch extends Thread { .:;i* LD6fi Z@h]dU5%a SiteInfoBean siteInfoBean = null; //文件信息Bean My[L3KTTp long[] nStartPos; //开始位置 3!}#@<j
long[] nEndPos; //结束位置 i$F)h<OU+ FileSplitterFetch[] fileSplitterFetch; //子线程对象 $6J5yE long nFileLength; //文件长度 '2
)d9_ w boolean bFirst = true; //是否第一次取文件 Ft|a/e boolean bStop = false; //停止标志 -p)HH@6a File tmpFile; //文件下载的临时信息 c'(]n]a% DataOutputStream output; //输出到文件的输出流 j[z\p~^ <D 5QlAN //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 0P)c)x5 public SiteFileFetch(SiteInfoBean bean) throws IOException te:VYP { w"sRK siteInfoBean = bean; Y# lE //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); #?-W. tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); #F9$"L1Hg if(tmpFile.exists ()) @-7K~in?^ { 1X{A}9nA bFirst = false; "RG.vo7b read_nPos(); &{
f5F7E@ } FIS-xpv$ else d_yqmx?w { `Yut1N nStartPos = new long[bean.getNSplitter()]; J:Qp(s-N^: nEndPos = new long[bean.getNSplitter()]; '6aH*B:}*; } dxU[>m; l p? h~ I,#U
_ \"lzmxe0p } Zc"]Cv( 7_{x '#7 7.=u:PK7kM public void run() ``NjNd { CHLMY}O0 //获得文件长度 Kc(_?` //分割文件 c"QI`;D_c //实例FileSplitterFetch MBg^U<t8 //启动FileSplitterFetch线程 ^*0;Z<_ //等待子线程返回 =B/^c>w2 try{ ngNg1zV/q if(bFirst) \/,SH?>4x { 9sRP8Nj| nFileLength = getFileSize(); ?,Hk]Rl3 if(nFileLength == -1)
8!T^KMfz { kg-%:;y. System.err.println("File Length is not known!"); zL_X?UmV } mtF&Z\ag else if(nFileLength == -2) z1"UF4x* { 8CYJR/ System.err.println("File is not access!"); 4o|~KX8Qz } $4L=Dg else Q;Oc#
u { jQ[Z*^"} for(int i=0;i<nStartPos.length;i++) 7kb`o
y;(^ { 5Ut0I]h|z nStartPos = (long)(i*(nFileLength/nStartPos.length)); B kC(9[Ei } 5H',Bm4- for(int i=0;i<nEndPos.length-1;i++) n
XQg(! { i? a]v 5 nEndPos = nStartPos[i+1]; ) ejvT- } n_w,Ew,>5 nEndPos[nEndPos.length-1] = nFileLength; W6*(Y } WpvH} l r} } X!"y>J Dg]i}; KYeA= //启动子线程 A7sej fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; EdU3k'z$ for(int i=0;i<nStartPos.length;i++) 6Qo6T][ { iffU}ce fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), E O}(MXS siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ^oP]@r"qy nStartPos,nEndPos,i); @emZwN"m Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); uD5i5,q1Hs fileSplitterFetch.start(); ,<[os } #VrT)po+ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), |, :(3Ml siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Dp'/uCW) // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 1k hwwoo nEndPos = " + nFileLength); _\1(7 ?0D // fileSplitterFetch[nPos.length-1].start(); +6>Pp[% 1E-$f |W::\yu6 //等待子线程结束 2L\h+) //int count = 0; {vU '>pp //是否结束while循环 "5e]-u' boolean breakWhile = false; 1ri#hm0x\ &iSQ2a!l8b Mu:H'$"'H while(!bStop) C=Zuy^ { >LNl8X:Cz* write_nPos(); FKzqJwT Utility.sleep(500); }\irr9, breakWhile = true; 5<S1,u5 U%#=d@? (z.Vwl5 for(int i=0;i<nStartPos.length;i++) G9gvOEI/ { \2LCpN if(!fileSplitterFetch.bDownOver) 1DBzD%@Oz { !K@yB)9 breakWhile = false; ^8\pJg_0 break; G(4k#jB } $M><K } y}3V3uqK if(breakWhile) y_nh~& break; 7X.1QSuE ar{e<&Bny >Te{a*`"m: //count++; 7eO8cPy //if(count>4) I?:V EN: // siteStop(); |;].~7^ } Lf,gS*Tg? 68d @By ^a]i&o[c System.err.println("文件下载结束!"); {wm
` } ZzE&? catch(Exception e){e.printStackTrace ();} oNdO@i%.q4 } H4pjtVBr 9#agI|d~ Hnaq+ _] //获得文件长度 1|%$ie public long getFileSize() 7,jqA"9 { 7Jqp2\ int nFileLength = -1; $~j]/ U try{ [IYs4Y5 URL url = new URL(siteInfoBean.getSSiteURL()); HsXFglQ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); !F%dE! httpConnection.setRequestProperty("User-Agent","NetFox"); gi`ZFq@ +I')>6 U_J|{*4S.! int responseCode=httpConnection.getResponseCode(); OO@$jXZB if(responseCode>=400) VP"L_Um { 7j]@3D9[:p processErrorCode(responseCode); {k)MC)% return -2; //-2 represent access is error cEN^H } Z]6D0b yWs/~5[F }`eeIt I+ String sHeader;
1|`9Hp6 57#:GN$EL X$xqu\t7 for(int i=1;;i++) "47nc1T+n { 8=?I/9Xh //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); -8TLnl~[ //Utility.log(in.readLine()); Di L@NU!$q sHeader=httpConnection.getHeaderFieldKey(i); Z<wg` if(sHeader!=null) n
b{8zo { #(A>yW702 if(sHeader.equals("Content-Length")) 4ASc`w*0 { t EN%mK nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Gh< r_O~L3 break; ;<* VwXJR } aH~il!K } -}>Q0d ) else Z2ZS5a break; O[m+5+ } +Y\#'KrA } e]5QqM7 catch(IOException e){e.printStackTrace ();} e5AiIVlv catch(Exception e){e.printStackTrace ();} I7}[%(~Sf/ ]02V,'x HH]LvK Utility.log(nFileLength); }X`K3sk2/z .$r(":A#) S5XFYQ return nFileLength; *
5j iC } [[)HPHSQ 2qEy"DKu V^Nc0r //保存下载信息(文件指针位置) "B\qp "N private void write_nPos() lKa}Bcd { v<c8qg try{ } o=g) output = new DataOutputStream(new FileOutputStream(tmpFile)); @hCGV'4 output.writeInt(nStartPos.length); M^bujGD for(int i=0;i<nStartPos.length;i++) +XQS
-= { <?I~ + // output.writeLong(nPos); 1M+mH#? output.writeLong(fileSplitterFetch.nStartPos); ^,rbA>/L output.writeLong(fileSplitterFetch.nEndPos); L-Hl.UV } |+[bKqI5 output.close(); h qxe } m=#2u4H4 catch(IOException e){e.printStackTrace ();} )UxF lp;\ catch(Exception e){e.printStackTrace ();} oZIoY*7IrQ } 9SU;c l .qHgQ_% !]"T`^5,Y //读取保存的下载信息(文件指针位置) cLXMq"?C private void read_nPos() eQNYfWR { }6o` in>M try{ Xl}>mbB DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Mbi)mybM int nCount = input.readInt(); lT%o6qgT nStartPos = new long[nCount]; OW6i2 >Or nEndPos = new long[nCount]; bclA+!1 for(int i=0;i<nStartPos.length;i++) $V@IRBm { DQE.;0ld nStartPos = input.readLong(); e}Db-7B_~ nEndPos = input.readLong(); +4@EJRC }
a|OX4 input.close(); P ^D\znvc } No h*1u* catch(IOException e){e.printStackTrace ();} yDHH05Yl catch(Exception e){e.printStackTrace ();} p(
z.[ } yYW>) w
5,- +&; U/TF,JUI private void processErrorCode(int nErrorCode) UGAP$_j
]P { d#A.A<p* System.err.println("Error Code : " + nErrorCode); m. XLpD } O8M;q!)y eE7+fMP{ j]jwQRe //停止文件下载 TT>;!nb public void siteStop() j{nL33T% { eO*FoN bStop = true; cm-!6'` for(int i=0;i<nStartPos.length;i++) "zYlddh fileSplitterFetch.splitterStop(); %SIbpk% WJl&Vyl2FL ZX'/[wAN) } &t`l,]PQ=6 } lh
.p`^v //负责部分文件的抓取 2r\f!m' **FileSplitterFetch.java %kyvtt */ uN'e~X6 package NetFox; Ut0oh V+DN<F- $My%7S/3 import java.io.*; X62GEqff import java.net.*; g
}5lGz4 mhVSZhx| rBT#Cyl public class FileSplitterFetch extends Thread { }+,;wj~ 0>>tdd7 O$KLQ '0"n String sURL; //File URL t}]=5)9< long nStartPos; //File Snippet Start Position '(~+
\ long nEndPos; //File Snippet End Position )88z=5. int nThreadID; //Thread's ID )]?sCNb boolean bDownOver = false; //Downing is over :6%wVy5 boolean bStop = false; //Stop identical 6 fL=2a FileAccessI fileAccessI = null; //File Access interface )%gigQZ+ H71LJfH Koo%mr public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException `cCsJm$V" { N<9CV!_ this.sURL = sURL; R9^Vk*`gFU this.nStartPos = nStart; RYy_Ppn96f this.nEndPos = nEnd; e'p'{]r<w nThreadID = id; l7n c8K fileAccessI = new FileAccessI(sName,nStartPos);//定位 'tklz* } `gx_+m^ F0qGkMs|f r 1n l! public void run() ;3 O0O { 1o
V\QK& while(nStartPos < nEndPos && !bStop) g>cp;co9g { =:uK$>[ %;~Vc{Xxt/ n~@;[=o?5 try{ P|l62!m< URL url = new URL(sURL); I^emH+!MW HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); j!F5gP-l httpConnection.setRequestProperty("User-Agent","NetFox"); [}|x@
v9 String sProperty = "bytes="+nStartPos+"-"; !Qy%sY httpConnection.setRequestProperty("RANGE",sProperty); nd}[X[ay Utility.log(sProperty); w9G (^jS6 =#
<!s! JgEPzHgx InputStream input = httpConnection.getInputStream(); ">@]{e* //logResponseHead(httpConnection); `O5wM\Z 0NL~2Qf_4 C|*U)#3:F byte[] b = new byte[1024]; W9+H/T7! int nRead; I r]#u]Ap while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 'pa[z5{k+ { ;p)RMRMg nStartPos += fileAccessI.write(b,0,nRead); 3rBSwgRl //if(nThreadID == 1) gY|f[M| // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); &@<Z7)) } GHWi,' mr ~=67#&(R *eK\W00 Utility.log("Thread " + nThreadID + " is over!"); "wy|gnQJ bDownOver = true; yS'W ss
//nPos = fileAccessI.write (b,0,nRead); K&3,J7&& } ^ ~'&K e catch(Exception e){e.printStackTrace ();} 8iA[w-Pv } }OL?k/w } f#f<Ii UuPXo66F] L7VD ZCV //打印回应的头信息 $KHw=<:)/ public void logResponseHead(HttpURLConnection con) 7@oM?r7td { >"5f B for(int i=1;;i++) W8,4LxH { Ve)P/Zz}^ String header=con.getHeaderFieldKey(i); GJS3O;2* if(header!=null) D~P3~^ //responseHeaders.put(header,httpConnection.getHeaderField(header)); hg4 d]R, Utility.log(header+" : "+con.getHeaderField(header)); tpPP5C{ else `1
A,sXfa break; >}?jO B } A{NKHn>%` } 4&N#d;ErC 4}.PQ{ /Z^"[Ke public void splitterStop() [J{\Ke0<e1 { Y&wtF8 bStop = true; =>3wI'I } #0kVhx7% Is&0h| 8z1#Q#5 } WVZ](D8Gc] 8L1vtYz Ec'Hlsgh&T /* X(_xOU)V **FileAccess.java O2{~Q{p *//文件访问(定位,写) !B|Aq-
n, package NetFox; v'RpsCov import java.io.*; w2X0.2)P2 /{Mo'.=Z 27J!oin$ public class FileAccessI implements Serializable{ C fs2tN vG'6?%38 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 )+7|_7
!x RandomAccessFile oSavedFile; nwS @r long nPos; u1 Z;n c~``)N f4 k public FileAccessI() throws IOException e'I/}J { (/gv
U80 this("",0); cV$an } a_Sp}s<J FP=up#zl ,ArHS public FileAccessI(String sName,long nPos) throws IOException qPQ6`rD\ { Nwwn #+ oSavedFile = new RandomAccessFile(sName,"rw"); )fy-]Ky
* this.nPos = nPos; r{ >`" oSavedFile.seek(nPos); `uP:UQ9S } 2x5^kN7 (n{x"rLy/ z`}z7e'> public synchronized int write(byte[] b,int nStart,int nLen) 6.Jvqn { &zR\Rmpt int n = -1; 3#A4A0 try{ \+)aYP2Hu oSavedFile.write(b,nStart,nLen); "_^vQ1M]Z n = nLen; Bo,>blspw } whi#\>i catch(IOException e) *O|_)G { %<)!]8}P* e.printStackTrace (); 4bs<j } \E(^<Af Y1Q240 k=W~ot& return n; 8$F"!dc _ } I1pnF61U w!dgIS$ d88Dyzz } +0ALO%G;G" _`I}"`2H v!`:{)2C /* &HQ_e$1 **SiteInfoBean.java ;~-ZN?8
*/ TMsc5E package NetFox; Ct][B{ jj&mRF0gCb 2U|"]tpM& public class SiteInfoBean { 3qW]( Z=9<esx tzShds private String sSiteURL; //Site's URL :5sjF:@ private String sFilePath; //Saved File's Path g#k@R'7E private String sFileName; //Saved File's Name \ 5.nr*5 private int nSplitter; //Count of Splited Downloading File x2,;ar\D h2-v.Tjf }_Ci3|G>%D public SiteInfoBean() 7qSnP30} {//nSplitter的缺省值为5 Sse%~:FL //default value of nSplitter is 5 7@&mGUALO this("","","",5); 9^u}~e
#( }
J8-K 7W'&v+\ Ze!/b|`xI public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) O _C<h { ,\?s=D{ sSiteURL= sURL; 6gabnW3 sFilePath = sPath; v2IcDz`}7 sFileName = sName; CcTdLq this.nSplitter = nSpiltter; :7M%/#Fy +zwS[P@ :_,a%hb+8 } 9Af nMD ~47 0LgpO1 **$kWbS public String getSSiteURL() @d5$OpL$% { J&Db- return sSiteURL; RBz"1hRo` } / Xq|SO IgjPy5k 1M.#7;#B3 public void setSSiteURL(String value) 25f[s.pv8 { L@'2}7N1% sSiteURL = value; MDQ:6Ri } #zv&h`gY h3bQ<?m 7H*,HZc@= public String getSFilePath() Q;N)$Xx { :t9sAD return sFilePath; ?V}ub>J/= } -X_\3J G1-r$7\ IL:[0q public void setSFilePath(String value) Oq$-*N { RH{+8?0 sFilePath = value; }3,
4B-8! } S\]9mHJI .820~b0 tU$n3Bg public String getSFileName() *<:6A&'D9 { /0cm7[a ? return sFileName; <)pPq+ } cNT !}8h^ |)v}\-\# mU(v9Jpf7 public void setSFileName(String value) rizjH+ { MQDLC7Y.p5 sFileName = value; 7O8 @T-f+2 } $}IG+,L $vK,Gugcx
_ X public int getNSplitter() .Tm.M7 { rg;4INs# return nSplitter; 8bQXC+bK } [m4M#Lg\0 w2!:>8o: e$teh`
p3 public void setNSplitter(int nCount) DE7y\oO] { AOkG.u-k nSplitter = nCount; U'msHF } T{2)d]Y } !Pz#czo FGPqF; p s?su` /* $IS!GS&: **Utility.java C~ A`h=A< */ ?hAO-*); package NetFox; YcV^Fqi! qO38vY){ BQ<\[H; public class Utility { |'&$VzA 5Ok3y|cEx x4PzP public Utility() ]%I\FefT { #?+[|RS| FZ}^)u}o K2e68GU } 4DDBf j E|>-7k") //线程睡眠 NV-l9 public static void sleep(int nSecond) WO{7/h</ { mR|5$1[b try{ t9MCT$U Thread.sleep(nSecond); wfe4b } w N`Njm9! catch(Exception e) FfxD=\ { &SPY'GQ! e.printStackTrace (); pH.&C 5kA } C-)d@LWI } PH&Qw2(Sx JWaWOk(t=? //日志 '^C
*%"I] public static void log(String sMsg)
Qe7=6< { mR1b.$ System.err.println(sMsg); )A%* l9\nG } IiRQ-,t1 y$bY
8L $T#fCx/ public static void log(int sMsg) 5-ED\- { {tl{j1d| System.err.println(sMsg); _yJz:pa } ?<BI)[B } %'i_iF8. _&\'Va$ QcX\z\'vg /* s3m\ **TestMethod.java |c8\alw */ +c!HXX package NetFox; rM,f7hm[S* ^&C/,,U p-_9I7? public class TestMethod { E3Y0@r Tn/Z s| Cse`MP public TestMethod() ?>{u@tYL { ///xx/weblogic60b2_win.exe ]LZ#[xnM7 try{ R) :Xs . SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); *k; bkd4x //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); /*>}y$ SiteFileFetch fileFetch = new SiteFileFetch(bean); YmFg#eS fileFetch.start(); t:V._@ } j0X^,ot@m catch(Exception e){e.printStackTrace ();} jIr\.i kr~n5WiAZ N?-ZvE\C } 1kpw*$P0 y\uBVa<B K> 4w public static void main(String[] args) +ctU7
rVy { &L5
)v\z new TestMethod(); XEbVsw } 0,)2\`99#k } VD@$y^!H 点击下载更多相关资料
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