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/* rL.<Z@- **SiteFileFetch.java uT'-B7N */ Zm`'MsgFr package NetFox; :QxL 9&" import java.io.*; +p8qsT#7 import java.net.*; T-hU+(+hg 9*7Hoi4Ji [0d-CEp[ public class SiteFileFetch extends Thread { H-;&xzAI v&k>0lV,^ l7!U),x%/U SiteInfoBean siteInfoBean = null; //文件信息Bean Xs{:[vRW long[] nStartPos; //开始位置 =W;t@"6>2 long[] nEndPos; //结束位置 k,
$I59 FileSplitterFetch[] fileSplitterFetch; //子线程对象 4!NfQk>X long nFileLength; //文件长度 Y]D7i?3N boolean bFirst = true; //是否第一次取文件 3D]2$a_d boolean bStop = false; //停止标志 Mp]yKl File tmpFile; //文件下载的临时信息 4jDs0Hn" DataOutputStream output; //输出到文件的输出流 uWJ#+XK. N8Rm}) //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) L*kh?PS; public SiteFileFetch(SiteInfoBean bean) throws IOException 1}i&HIr!b { ;,Of\Efc| siteInfoBean = bean; 5HWwl.D //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); fF8a 1XV tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ?7fQ1/emhO if(tmpFile.exists ()) <O
<'1uO, { 6ctHL<^ bFirst = false; a7XXhsZ read_nPos(); Xtu: } _)HD4,` else B"pFJ"XR { I}6DoLbV nStartPos = new long[bean.getNSplitter()]; |V5 $'/Y nEndPos = new long[bean.getNSplitter()]; q[PD } 2P;%P]~H GI 0x>Z+ oG4w8+N S3j]{pZ(z } ak~=[7Nv hj[+d%YZY" Oz4,Y+[# public void run() B[)
[fE { VEFwqB1l //获得文件长度 *"|VNnB //分割文件 Q0
uP8I}n //实例FileSplitterFetch 5Z4(J?n //启动FileSplitterFetch线程 icKg7-$N //等待子线程返回 ]7XkijNb try{ lpM>}0v if(bFirst) 2<46jJYL' { >!HfH(is\ nFileLength = getFileSize(); 3s+<
if(nFileLength == -1) ~8KF<2c { i6!T`Kau System.err.println("File Length is not known!"); Sleu#]- } p=mCK@ else if(nFileLength == -2) v!pj v% { l|R<F;| System.err.println("File is not access!"); N$=(1`zM= } ;~'cITL else 7G<KrKal { I]uOMWZs for(int i=0;i<nStartPos.length;i++) (<d&BV- " { 'S%} ?#J nStartPos = (long)(i*(nFileLength/nStartPos.length)); [*Aqy76Qa } Yj^avO=; for(int i=0;i<nEndPos.length-1;i++) 1sIy*z { QK``tWLIg7 nEndPos = nStartPos[i+1]; L5-T6CD } LK
nEndPos[nEndPos.length-1] = nFileLength; ei+9G, } Tc'{i#%9j } #f|NM7 'XZI{q2i y(bt56 |
z //启动子线程 h X>VVeIZ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; ${E[pT for(int i=0;i<nStartPos.length;i++) 6oTbn{=UUq { %h/#^esi fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q+u#?[' siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), k *G!. nStartPos,nEndPos,i); ]2aYi9) Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ZuFVtW@ fileSplitterFetch.start(); g "K#& } #Vn>ue+? // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Kc2OLz# siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); QKUBh-QFK // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 6h0U nEndPos = " + nFileLength); 9rpg1 0/T // fileSplitterFetch[nPos.length-1].start(); He0N T/WmS? 7 BnenHD //等待子线程结束 <y\
Z#z //int count = 0; Y?&DEKFbD //是否结束while循环 &0th1-OP_ boolean breakWhile = false; sw=JUfAhy
s>*Q c5wkzY h while(!bStop) "&~?Hzm { 5Sm 5jRr write_nPos(); T je o*n^ Utility.sleep(500); B:6sVJ breakWhile = true; IQk# @sgT[P*ut *1o+o$hY2 for(int i=0;i<nStartPos.length;i++) 4B3irHs\Q { >^a"Z[s[ if(!fileSplitterFetch.bDownOver) bD-/ZZz { TsFdy{/o* breakWhile = false; ['}^;Y?*o break; qUoMg%Z%l } V&4:nIS>z } Kl46CZs#8 if(breakWhile) HM$`z"p5jg break; MWn L#! mSk :7ozZ }{kTh%^ //count++; aG8D%i0 //if(count>4) q563,s // siteStop(); &JXHDpd$a^ } U>plv Z$#ZYD g+KzlS[6 System.err.println("文件下载结束!"); m`yn9(1Y[ } 5|~r{w)9 catch(Exception e){e.printStackTrace ();} CyK$XDHa } @7HOL-i +/b4@B7 A9qO2kq7_ //获得文件长度 \9|] public long getFileSize() {Hp}F!X$ { $*v 20 int nFileLength = -1; !6tC[W` try{ ?CT^Zegmr URL url = new URL(siteInfoBean.getSSiteURL()); PkCeV]`w HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Zs5I?R1e8 httpConnection.setRequestProperty("User-Agent","NetFox"); CI~;B SJ~I
r# =@Nv:1:r int responseCode=httpConnection.getResponseCode(); ^;k _ if(responseCode>=400) l5y#i7 q { _#YHc[Wz processErrorCode(responseCode); {DXZ}7w:v return -2; //-2 represent access is error
yu?s5 } >NOYa3 'd.@4 9
(E1>} String sHeader; Q@ ) rw0$ -g[*wN8 )[M<72 for(int i=1;;i++) *liPJ29C[ { 0h@%q;g //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); 0)`lx9&h //Utility.log(in.readLine()); #HnyE+tD sHeader=httpConnection.getHeaderFieldKey(i); zIQc#F6\5 if(sHeader!=null) im?XXsH' { Bc|x:#`C\{ if(sHeader.equals("Content-Length")) :56lzsWUE< { 6pn@`UK nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); N;ecT@Ug break; <<2b2?aS` } {!g.255+ } V\M!]Nnxr else 'y M:WcN break; ^Lfn3.M } U_{JM`JY } CU>K catch(IOException e){e.printStackTrace ();} U)w|GrxX catch(Exception e){e.printStackTrace ();} 5G] #yb74 RBD7mpd >3
.ep}, Utility.log(nFileLength); K!:
,l zHs ][5p.owJse return nFileLength; 8rG&CxI } ?jn6Op g1*H|nh2 W &wDH //保存下载信息(文件指针位置) 7}1Kafs private void write_nPos() +heS\I_Mp { ])wMUJWg2 try{ /qq&'}TZP output = new DataOutputStream(new FileOutputStream(tmpFile)); j5Wx*~@( output.writeInt(nStartPos.length); YlcF-a for(int i=0;i<nStartPos.length;i++) v3JIUdU=P { ^57fHlw // output.writeLong(nPos); cKYvRe output.writeLong(fileSplitterFetch.nStartPos); L{0OMyUA output.writeLong(fileSplitterFetch.nEndPos); S5
nw } A-wxf91+: output.close(); OI}HvgV^! } MW[ 4^ catch(IOException e){e.printStackTrace ();} yoY)6cn@ catch(Exception e){e.printStackTrace ();} DF[b? } W>|b98NPu 3Q~&xNf P_lcX;O //读取保存的下载信息(文件指针位置) >T*g'954xF private void read_nPos() x[>_I1TJ { k`~br249 try{ b oOw
K? DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); Q
fyERa\rb int nCount = input.readInt(); c3!|h1h/v nStartPos = new long[nCount]; ^$,kTU'= nEndPos = new long[nCount]; pH:|G for(int i=0;i<nStartPos.length;i++) &?`&X=Q { qf=[*ZY nStartPos = input.readLong(); pVa|o&, nEndPos = input.readLong(); 8Bt- } fh)`kZDk input.close(); x-#9i } Mh.eAM8 _ catch(IOException e){e.printStackTrace ();} #DRtMrfat catch(Exception e){e.printStackTrace ();} -*q2Y^A^l } K ':pU1 xAz4ZXj=q J o(}#_y? private void processErrorCode(int nErrorCode) wXZY5-h4 { KC-aLq/ System.err.println("Error Code : " + nErrorCode); _vLT!y } WI!z92qq[ [k=9 +0p }Z?[Ut //停止文件下载 Tc(v\|F, public void siteStop() r=||sZs { BBJ]>lQ bStop = true; :::f,aCAu for(int i=0;i<nStartPos.length;i++) +\oHQ=s>}\ fileSplitterFetch.splitterStop(); molowPI hJ*E"{xs ~S>ba'] } ![!b^:f } *g41"Cl //负责部分文件的抓取 L0VR( **FileSplitterFetch.java ?HyioLO */ 2^ZPO4| package NetFox; 'htA! KHF X/7_mU>aKT 3M*[a~ import java.io.*; *K.7Zf0 import java.net.*; [f(^vlK ~wg^>!E BF[?* b public class FileSplitterFetch extends Thread { S|4/C ~%K(ou=2 wXGFq3` String sURL; //File URL |M>k &p,B- long nStartPos; //File Snippet Start Position 4H?Ma|, long nEndPos; //File Snippet End Position W}_}<rlF int nThreadID; //Thread's ID HU+H0S~g boolean bDownOver = false; //Downing is over _rJSkZO boolean bStop = false; //Stop identical )tch>.EQ_ FileAccessI fileAccessI = null; //File Access interface 0i`Zy! +5mkMZ SW'KYzn public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException BmF>IQ`M? { 1O7ss_E this.sURL = sURL; 2^M+s\p this.nStartPos = nStart; ^ED>{UiNI this.nEndPos = nEnd; jtr=8OiL nThreadID = id; h1o+7 fileAccessI = new FileAccessI(sName,nStartPos);//定位 h#ot)m|I }
Ph{+uI $rYu4^ 2`U&,,-Mf public void run() V\hct$ 7Vm { 13kb~'+&r while(nStartPos < nEndPos && !bStop) z))[Lg { 7uNI +`3ZH9 -y*+G& try{ @}!$NI8 URL url = new URL(sURL); w>Sz^_ h HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); (
+hI httpConnection.setRequestProperty("User-Agent","NetFox"); :8wF0n-' String sProperty = "bytes="+nStartPos+"-"; !`=?<Fl httpConnection.setRequestProperty("RANGE",sProperty); 6e|5qKr Utility.log(sProperty); Z[bC@y[Wb }0>/G?2Yp
PW4Wn`u InputStream input = httpConnection.getInputStream(); X}Z%@ tL //logResponseHead(httpConnection); .Q)"F / K+OU~SED%F mXaUWgO byte[] b = new byte[1024];
@+#p:sE int nRead; .WE0T|qDX while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ;_&L^)~P$ { bQjHQ"G nStartPos += fileAccessI.write(b,0,nRead); 3*JybMo" //if(nThreadID == 1) >G~;2K[ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 1&"1pH } 0^Cx`xdX: 4344PBj @cGql=t Utility.log("Thread " + nThreadID + " is over!"); Sxu
v}y\ bDownOver = true; S]g)^f'a65 //nPos = fileAccessI.write (b,0,nRead); liP{Mu/LO } e,UgTxZ catch(Exception e){e.printStackTrace ();} q~_jF$9SX } i=QhXCM } iUB ni&B U .(_n CI'5JOqP //打印回应的头信息 9ksrr{tW public void logResponseHead(HttpURLConnection con) lM,:c.R { x&Rp
m<4 for(int i=1;;i++)
N&.p\T&t { TaT&x_v^~a String header=con.getHeaderFieldKey(i); %TgM-F,8 if(header!=null) 9Bw"VN]W //responseHeaders.put(header,httpConnection.getHeaderField(header)); _Z2)e*( Utility.log(header+" : "+con.getHeaderField(header)); ?3N86Qj else Sn&%epi break; Y|nTc.A } eqCB2u"Jq } R"([Y#>m ?0Zw ^a _0E,@[ public void splitterStop() Bx>@HU { Z Uv_u6aD bStop = true; So`"z[5 } R&xd
ic! gXMkI$ab [?*^&[ } L 3@wdC~0 c= uORt> )wd~639U /* 4*X$Jle| **FileAccess.java 92Iv'(1ba *//文件访问(定位,写) `,[c??h package NetFox; 5GkM7Zu!{j import java.io.*; kGP?Jx\PkH 6suc:rp"; DYK|"@ public class FileAccessI implements Serializable{ W0kq>s4 ?]N&H90^5 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Q-5wI$= RandomAccessFile oSavedFile; bmpB$@ long nPos; e:
tp7w 4 Q2JjBV< a mgex$ public FileAccessI() throws IOException N0C5FSH { rC16?RovQ@ this("",0); -X
\vB } 7F\g3^z9` oR)7 \;g xd<68%Cn public FileAccessI(String sName,long nPos) throws IOException zu%pr95U { ta(x4fP_ oSavedFile = new RandomAccessFile(sName,"rw"); p4 PFoFo2 this.nPos = nPos; dD%m=x oSavedFile.seek(nPos); 6}$cDk`dz } >2/zL.O mgWtjV 8 PV2904 public synchronized int write(byte[] b,int nStart,int nLen) *TkABUL { NQ!F` int n = -1; u 36;;z try{ S\m]z e oSavedFile.write(b,nStart,nLen); D=Y HJ>-wB n = nLen; =@>&kU%$& } w?q"%F;/ catch(IOException e) PYe>`X? { v*LL7b0A e.printStackTrace (); J:a^'' } QR)eJ5< 1rC'sfz 76/%Py| return n; , +^db) } x!+a,+G d?n~9_9e L z } jg(A_V ->(B:Cz _G|6xlO /* XQA2uR4h **SiteInfoBean.java S EmD's */ y(A"g3^= package NetFox; bOdD:=f %O${EN mVLGQlvVK public class SiteInfoBean { mfvQ]tz_+ mN`a]L' J,7\/O(`A private String sSiteURL; //Site's URL eu=2a> private String sFilePath; //Saved File's Path 'e@}N)IX private String sFileName; //Saved File's Name 'Vd>"ti private int nSplitter; //Count of Splited Downloading File ?)&TewP vKeK] ?kSs7e> public SiteInfoBean() 21qhlkdc {//nSplitter的缺省值为5 92i#It}-/ //default value of nSplitter is 5 {`LV{! this("","","",5); ]+8,@%=" } @h]H_ +j,;g#d Syk^7l public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) nL?B { q3:tZoeXV sSiteURL= sURL; !`gg$9 sFilePath = sPath; `
T!O
)5 sFileName = sName; ^RyrUb this.nSplitter = nSpiltter; ,x/j&S9! "'Q:%_; 62"ND+D4 } @."R9s /%)J+K) ~VKw%WK public String getSSiteURL() xM:dFS { .1@5*xQ5O return sSiteURL; Z&%61jGK } 3-05y!vbcE -[ =`bHo X:A\{^~ public void setSSiteURL(String value) >nxtQ { 8Y9mB#X sSiteURL = value; 7"NUof?i } 7j
Q`i;L}Y e|I5Nx2) ,RZktWW_ public String getSFilePath() }Y[.h=X { 6= return sFilePath; Q|>y2g! } D"MNlm VioVtP0
KH;e)91 public void setSFilePath(String value) eR/7*G5 { ^%L$$V
nG sFilePath = value; 3eB2=_V` } (8I0%n}.Zo <1y%ch; UX?_IgJh<" public String getSFileName() 0V^?~ex { #E#70vWp\O return sFileName; B 5?(gb" } ]OVjq? by
{~gu \rpu=*gt public void setSFileName(String value) $j:0*Z=> { 4l|Am3vzX sFileName = value; mp#5Vc } . &e,8 Y/ `fPgE gnv4.f: public int getNSplitter() [L 8gG.wy { 3laSPih[. return nSplitter; PtHT> } 7(jt:V6V 8S0)_L#S w4OVfTlN public void setNSplitter(int nCount) K46\Rm_:B; { g$<@! nSplitter = nCount; R}0cO^V } %spR7J\"/ } /XXW4_> th]9@7UE, xkX,
l{6 /* htjJ0>& **Utility.java |h#mv~cF */ zn M"P|A package NetFox; S\C A%9"7]:
6)TFb, public class Utility { B *:6U+I ^xq%P2s0 03,+uf public Utility() Q>.-u6(& { Y4 i-Pp? DzYno-]A] 9gFC]UVWh } #i~.wQ$1 )wKuumet //线程睡眠 TPkm~>zD. public static void sleep(int nSecond) xT@\FwPr { nI6`/ try{ ^,?]]=mE Thread.sleep(nSecond); [P[syi#]t } +%FGti$[ catch(Exception e) lVqvS/_k$ { sl)_HA7G e.printStackTrace (); MOj 0"x) } Gm*i='f!? } sI~{it# HMBxj($eR //日志 r+) A)a, public static void log(String sMsg) 6OVAsmE { $
@^n3ZQ4 System.err.println(sMsg); %DiZ&}^Ck } %N!Y}$y iJq}tIk#2' #fa~^]EM] public static void log(int sMsg) vHao
y { 50CU| System.err.println(sMsg); N?~K9jGx( } ?4xTA
} NxNz(R
$~ -tDmzuD6 ~_R=2t{u_ /*
|,.glL **TestMethod.java {4#'`Eejj */ cP(/+
/9 package NetFox; "5vFa7y #w#B' ,cpPXcz ?, public class TestMethod { |,qz7dpe C7PHZ`< Ua(!:5q? public TestMethod() Z,ag5 w`]L { ///xx/weblogic60b2_win.exe C,K P!B{ try{ Zr`:A$ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); +f|u5c //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); +`\C_i- SiteFileFetch fileFetch = new SiteFileFetch(bean); 8on2BC2 fileFetch.start(); Vk[m$ } 3EAu#c@q" catch(Exception e){e.printStackTrace ();} `57ffQR9 Dtelr=/s Nk]r2^.z[ } [t,7H (/c9v8Pr(7 3q<\
\8Y* public static void main(String[] args) aWW|.#L { r lW new TestMethod(); )V+;7j<"D } ]_j{b)t } j5tA!o 点击下载更多相关资料
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