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/* tl;b~k **SiteFileFetch.java jyB
Ys& v */ DTlId~Dyq package NetFox; ( 8X^pL import java.io.*; uUb`Fy9 import java.net.*; x\oSD1t, O(6j:XD Y/sZPG}4 public class SiteFileFetch extends Thread { 03c8VKp'p
~owodc ?,i}Qr [Q SiteInfoBean siteInfoBean = null; //文件信息Bean >Ptu-* long[] nStartPos; //开始位置 ]iMqIh" long[] nEndPos; //结束位置 Z~].v._YV) FileSplitterFetch[] fileSplitterFetch; //子线程对象 Zo,066'+[. long nFileLength; //文件长度 YmCu\+u boolean bFirst = true; //是否第一次取文件 GT<!e]=6 boolean bStop = false; //停止标志 /;kSa}"Q File tmpFile; //文件下载的临时信息 )<lQJ#L86a DataOutputStream output; //输出到文件的输出流 bct8~dY ,m8mh)K?0> //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) (vp#?-i public SiteFileFetch(SiteInfoBean bean) throws IOException /+1(,S { p| ?FA@ 3 siteInfoBean = bean; 0Py*%}r1 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); a`R_}nus* tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); ]tzF
Ob if(tmpFile.exists ()) 7pou(U { IdM~'
Q>\ bFirst = false; >g m read_nPos(); !ewT#afyu( } t3h ){jZ else Sy']fGvx { %DA&txX}w nStartPos = new long[bean.getNSplitter()]; o7s!ti\G nEndPos = new long[bean.getNSplitter()]; <PiO %w{ } +I?k8',pi Qj'Ik`o 9w~SzpJ% F0~<p[9Nx } &B]1 VZUp 9VanR
::XX `ZbFky{ public void run() !*f$*,=^ { [2Zl
'+ //获得文件长度 C T\@>!'f //分割文件 7WwE] ^M //实例FileSplitterFetch b;%t*?t //启动FileSplitterFetch线程 lh[?`+A //等待子线程返回 Z #T try{ Y2;2Exp^ if(bFirst) T];dFv-GT { uuxVVgWp{ nFileLength = getFileSize(); s_a jA if(nFileLength == -1) \EsT1aT { ~>HzAo9e System.err.println("File Length is not known!"); UOk\fyD2[ } $
nHD,h else if(nFileLength == -2) bAbR0) { ,ryL("G System.err.println("File is not access!"); R1D ; } a HVzBcCPh else #y[U2s Se { YM};85 K for(int i=0;i<nStartPos.length;i++) PfZS"yk { b\"w/'XX nStartPos = (long)(i*(nFileLength/nStartPos.length)); D$7#&2y } 78Du for(int i=0;i<nEndPos.length-1;i++) Mc<u?H { &
+*OV:[; nEndPos = nStartPos[i+1]; X^Z!!KTH } ![sXR nEndPos[nEndPos.length-1] = nFileLength; wYg!H>5 } 6JDaZh"=K } n_3R Q6 9}u,`& Xjkg7p,HD@ //启动子线程 DY9]$h*y fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; IvT><8<G for(int i=0;i<nStartPos.length;i++) t&:L?K)j { [:FiA?O] fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), a&V;^ / siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), DU0/if9. nStartPos,nEndPos,i); .] sJl Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ^lAM /
fileSplitterFetch.start(); 8;V9%h`P> } nYFrp)DLK // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), FY ms]bv siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); I# &r5Q // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ZZ7qSyBs? nEndPos = " + nFileLength); M
`^[Y2 c // fileSplitterFetch[nPos.length-1].start(); i'7+
?YL u '7h(1@ IHYLM;@L //等待子线程结束 dH!z<~ //int count = 0; An$2='=/ //是否结束while循环 >WIc"y. boolean breakWhile = false; 'gvR?[!t o87kF!x %VH, (}i while(!bStop) nuXL{tg6 { =o~GLbsER write_nPos(); sVK?sBs] Utility.sleep(500); +a3E=GJ breakWhile = true; >
[J. 8 {V9)U w y|^=#k for(int i=0;i<nStartPos.length;i++) V`1,s~"q { 8HQ.MXKP if(!fileSplitterFetch.bDownOver) TK
fN`6 { EU %,tp breakWhile = false; ^>?=L\[ break; dPwyiV0 } kIVQ2hmv } {d'-1z"q if(breakWhile) pA~}_ break; >%k6k1CZ k~^4 MQQm3VaKS //count++; R7kkth //if(count>4) `oJQA$UD // siteStop(); m{/(
3 } %bAQ>E2;m +cfEyiub eF,F<IJT{ System.err.println("文件下载结束!"); MLu!8dgI } d_,5;M^k catch(Exception e){e.printStackTrace ();} ];OvV ,* } gvA}s/ -2M~KlYl S^eem_C //获得文件长度 x9vSekV public long getFileSize() x,!Dd { (?fU l$q\ int nFileLength = -1; <X:JMj+ try{ }l|S]m!
URL url = new URL(siteInfoBean.getSSiteURL()); 6OAs%QZ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); #$I@V4O;# httpConnection.setRequestProperty("User-Agent","NetFox"); WVdV:vJ- .|Huzk+ UqOBr2UmG int responseCode=httpConnection.getResponseCode(); ;!MQ@Fi^ if(responseCode>=400) %.Ma_4o
Z { -B
*W^-;* processErrorCode(responseCode); C9!t&<\} return -2; //-2 represent access is error >
S>*JP } q 84*5- FH+X< 5To@d|{ String sHeader; Y~WdN<g v Y0bK- ~5f&<,p! for(int i=1;;i++) \8 `7E1d { >>y`ap2%V //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); H<(F$7Q!\ //Utility.log(in.readLine()); 68Fl/
sHeader=httpConnection.getHeaderFieldKey(i); j
uA@"SG if(sHeader!=null) \c<
oVF' { fF(2bVKP: if(sHeader.equals("Content-Length")) ;
oyV8P$ { RbAl_xKI nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); eV[{c %wN: break; @C)s4{V } jE\G_> } VJ~D.ec else wJy]Vyd break; C !j3@EZ$ } "do5@$p| } 3iCe5VF catch(IOException e){e.printStackTrace ();} 7q?ZieR catch(Exception e){e.printStackTrace ();} rwRZGd *p U.e!:f4{ --K)7 Utility.log(nFileLength); !l (Vk T$5wH )< L4>14D\ return nFileLength; 9>)b6)J D } ^kKLi 9/k2zXY >)kKP8l7 //保存下载信息(文件指针位置) V<QpC5 private void write_nPos() b^/u9 { )|~&(+Q?] try{ }r:"X<` output = new DataOutputStream(new FileOutputStream(tmpFile)); |_;kQ(, output.writeInt(nStartPos.length); >Xn,jMUW for(int i=0;i<nStartPos.length;i++) (a[BvJf { @t%da^-HS" // output.writeLong(nPos); .U!EA0B output.writeLong(fileSplitterFetch.nStartPos); p<mL%3s0 output.writeLong(fileSplitterFetch.nEndPos); :Y99L)+=/ } &}"kF\ output.close(); $*C
}iJsF } d@Z DIy catch(IOException e){e.printStackTrace ();} h4hAzFQ.s catch(Exception e){e.printStackTrace ();} T3wTMbZ!VK } :zHSy&i` q" VmuQ MhMiSsZ //读取保存的下载信息(文件指针位置) o?baiOkH private void read_nPos() .>"xp6 { '12m4quO try{ Hn/t'D3 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); E`)e
;^ int nCount = input.readInt(); )s!A\a`vEd nStartPos = new long[nCount]; ,U{dqw8E{ nEndPos = new long[nCount]; +^AdD8U for(int i=0;i<nStartPos.length;i++) opfnIkCe { /TMVPnvz. nStartPos = input.readLong(); 'V&g"Pb nEndPos = input.readLong(); q[U pP`Z% } v;(cJ,l input.close(); V IzIl\<aM } C*YQ{Mz(f catch(IOException e){e.printStackTrace ();} T"g_a|7Tj catch(Exception e){e.printStackTrace ();} [<@L`ki } V^s, 3C $_<[kci% .x=abA$!9 private void processErrorCode(int nErrorCode) 1uo-?k { VzT*^PFBg System.err.println("Error Code : " + nErrorCode); (Y~/9a4X } 59.$;Ip;g ]3v)3Wp u>'0Xo9R //停止文件下载 +3))G public void siteStop() ]xS%Er { ie1~QQ bStop = true; WI1YP0V for(int i=0;i<nStartPos.length;i++) WL+EpNKSf fileSplitterFetch.splitterStop(); 4 $k{, Id?-Og2iV /Z2u0jNArP } )
gl{ x
} ug%7}& //负责部分文件的抓取 t]B`>SL3W **FileSplitterFetch.java nAQ[
-NbW, */ c44s@E package NetFox; #66i!} Ku'a,\7z (cVIjo+:: import java.io.*; }0&Fu?sP import java.net.*; gbdzS6XW~ |E6Thvl$ KcT(/! public class FileSplitterFetch extends Thread { -o/Vp>_UOE LuRCkKJ X!hzpg(`hR String sURL; //File URL =sWK;` long nStartPos; //File Snippet Start Position 'l<#;{ long nEndPos; //File Snippet End Position myo4`oH int nThreadID; //Thread's ID nzbVI boolean bDownOver = false; //Downing is over BD"Dzq boolean bStop = false; //Stop identical +`flIG3RV FileAccessI fileAccessI = null; //File Access interface remc_}`w i6bUJtL e\}@w1 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Csu9u'.V { U/Cc!WXV] this.sURL = sURL; dsX"S;`v this.nStartPos = nStart; Lum=5zDo this.nEndPos = nEnd; B/16EuH# nThreadID = id; EwBrOq`C fileAccessI = new FileAccessI(sName,nStartPos);//定位 F*G]Na@6D } c6b51)sQ" X[/7vSqZ@w hGKQK
^bn public void run() b\\lEM>o1 { n%WjU)< while(nStartPos < nEndPos && !bStop) I?1BGaAA { blomB2vQ ce$[H}rDB *lDVV,T'}w try{ eJf]"- URL url = new URL(sURL); 8A0a/
7Lj HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }#<Rs httpConnection.setRequestProperty("User-Agent","NetFox"); }se3y String sProperty = "bytes="+nStartPos+"-"; |zRrGQYm httpConnection.setRequestProperty("RANGE",sProperty); BuvnY Utility.log(sProperty); ~"*W;|) ~APS_iG[ ,OrrGwp& InputStream input = httpConnection.getInputStream(); TQ![ //logResponseHead(httpConnection); Lt~&K$t7~ Eg&5tAyM (0@b4}Z byte[] b = new byte[1024]; I>8_gp\1 int nRead; D<70rBf2 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) n"?*"Ya { ~|<'@B!6 nStartPos += fileAccessI.write(b,0,nRead); a?ete9Q+ //if(nThreadID == 1) T:
My3&6 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); y ~-v0/ }
"O#
V/( i\uj>;B IT#Li Utility.log("Thread " + nThreadID + " is over!"); bR}fj.gP bDownOver = true; `s69p'<;p //nPos = fileAccessI.write (b,0,nRead); k v_t6 (qd } {^Q,G x( catch(Exception e){e.printStackTrace ();} ;mI^J=V3 } ,+d8
} O,7S1 ml2/}} AP`1hz4].- //打印回应的头信息 ~[F7M{LS public void logResponseHead(HttpURLConnection con) K20Hh7cVJ { u-jV@Tz for(int i=1;;i++) -F(luRBS(W {
K#6@sas String header=con.getHeaderFieldKey(i); "([gN: if(header!=null) HP7~Zn)c //responseHeaders.put(header,httpConnection.getHeaderField(header)); 0`V=x+*, Utility.log(header+" : "+con.getHeaderField(header)); 0i5S=L`j else $U/lm;{% break; *"OlO}o } *N: $,xf } :^paI qHheF%[\5 'cu14m_ public void splitterStop() oP
T)vN? { ?x 0gI
bStop = true; $v_&jE } n2_;:= #%%!r$UL |bQF.n_ } t>a D;|Y Q(Yn8t cDYOJu. /* ]Ar,HaX- **FileAccess.java RnC+]J+?4 *//文件访问(定位,写) GJ`._ju package NetFox; -Ju;i< import java.io.*; ukVBC"Ny ue?3;BF 5 pyX:$j2R+% public class FileAccessI implements Serializable{ B[h^] k unqUs08 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 -ON-0L RandomAccessFile oSavedFile; i`<L#6RBT long nPos; 4*o?2P$Q IMM+g]#e @d^DU5ats> public FileAccessI() throws IOException RO3q!+a$/ { |Vlx: this("",0); G{,DoCM5WL } pd`m//G CAx
eJ`Q r9!s@n public FileAccessI(String sName,long nPos) throws IOException 9Nna-}e?W { =z"8#_3A oSavedFile = new RandomAccessFile(sName,"rw"); t_16icF9U this.nPos = nPos; PJ&L7 oSavedFile.seek(nPos); $0OOH4 } &PApO{#Q ai?N!RX%H O#):*II`9 public synchronized int write(byte[] b,int nStart,int nLen) yJ]Va $M { .v}|Tp&k int n = -1; {jwLVKT$ try{ x)N QRd oSavedFile.write(b,nStart,nLen); VR1[-OE
n = nLen; z6;hFcO } oC}
u catch(IOException e) q7_Ttjn-DV { A)j!Wgs^z e.printStackTrace (); =vQ J2Rg } lIx./Nf KXl!VD,#`= TF!v ,cX return n; p_]b=3wt~ } -F*vN' ~:0w% oP4+:r)LKD } <s\ZqL$f h 6IXD N _Yp~Oj /* ^A=tk!C **SiteInfoBean.java ^Z\"d#A */ .p o,.} package NetFox; &Ruq8n< mvTp,^1 Jd v;+HN[ public class SiteInfoBean { '3sySsD&O $%'3w~h` vGPsjxk& private String sSiteURL; //Site's URL #639N9a~ private String sFilePath; //Saved File's Path ZQ*Us*9I private String sFileName; //Saved File's Name ;PMh>ZE` private int nSplitter; //Count of Splited Downloading File D *PEIsV m__pQu: l1O"hd'~s public SiteInfoBean() uM,Ps} {//nSplitter的缺省值为5 E,K>V:P* //default value of nSplitter is 5 gX-hYQrC this("","","",5); P,3w
b } b5
NlL`g HOCj* O4 L@zhbWY public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) E]m?R 4 { aHYISjZ]> sSiteURL= sURL; T*=*$% sFilePath = sPath; U1lqg?KO sFileName = sName; h9}*_qc&kV this.nSplitter = nSpiltter; mW{> W\w#}kY 4*E5@{D } fn5-Tnsq* nP*% N|0 N#-pl:J( public String getSSiteURL() 1 JIU5u) { ?YS 3) return sSiteURL; SA=>9L,2 } M3|G^q:l dkCUU 5E~^-wX public void setSSiteURL(String value) Xxd]j] { @@{5]Y sSiteURL = value; o59$vX, } XGC\6?L~ vDi Opd <Up?w/9 public String getSFilePath() $7g+/3Fu^ { f38e(Q];m return sFilePath; 6'@ {
*
u } x{<l8vL=-c E!mv} 'x"(OdM:[ public void setSFilePath(String value) 2=0HQXXrq { 8=joVbs sFilePath = value; udLI AV* } 6j6;lNUc fxr#T'i {N/%%O.b public String getSFileName() \#B<'J9.` { iQ2j ejd3( return sFileName; qz (x } 9`Fw}yAt P#XV_2 *x;4::'Jn public void setSFileName(String value) g; ]' { Ur>1eN%9' sFileName = value; {)!>e } 7X/t2Vih@ [?KGLUmTAI 5~ :/%+F0= public int getNSplitter() B,w
ZI4oi* { O x-eB return nSplitter; emnT;kJ> }
Pn[oo_)s -,p=;t#( =D Q:0w public void setNSplitter(int nCount) \y=oZk4 { q^EY?;Y nSplitter = nCount; DmLx"%H3 } |llJ%JhF } _(kaa WJ 0.n[_?<( flFdoEV.U) /* d,JDfG) **Utility.java @&WHX# */ Jut&J]{h package NetFox; NzP71t+ tS] y5m2u8+
public class Utility { l&qCgw _"yA1D0d_ e}d(.H%l0 public Utility() uij^tN% { f6`GU$H kv3Dn&<rJ V<H9KA } Op?"G ^sLx3a //线程睡眠 "W(Ae="60 public static void sleep(int nSecond) +W*~=*h| { y@!o&,,mq try{ g)#{<#*2 Thread.sleep(nSecond); G,|!&=Pe|E } o1$u;}^ | catch(Exception e) 4<F
z![> { &EQhk9j e.printStackTrace (); LtMM89u } }\7UU?@ n } ~!r;?38V` NSB6 2 //日志 Kh(`6 f public static void log(String sMsg) `/P/2{,~ { Wa<<"x$ System.err.println(sMsg); &R_7]f+%) } Q]xkDr?
\BXzmok +C{-s public static void log(int sMsg) Ytlzn% { )P:^A9&_n= System.err.println(sMsg); ?";SUku } ,=m.WmXE } Jd>~gA}l s51$x M J @"# /* +hmFFQQ} **TestMethod.java @9gZH_ur>E */ g8%O^)d=> package NetFox; &P|[YP37_ x [FLV8`b| <s'de$[ public class TestMethod { !-f Bw p?rlx#M YS9RfK/ public TestMethod() YzI;) { ///xx/weblogic60b2_win.exe :;7I_tb try{ r<e%;S SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); b]+F/@h~] //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); Y$r78h=4 SiteFileFetch fileFetch = new SiteFileFetch(bean); A]/o-S_ fileFetch.start(); { :tO
RF } J/?Nf2L4 catch(Exception e){e.printStackTrace ();} a[O6xA% 1q;v|F Nujnm$!,Q } =#b@7Yw: c~Ka) dF| 7w/IHM L public static void main(String[] args) #dA$k+3 { \WCQ>c?~ new TestMethod(); v~P,OP("c } o|(5Sr&H } Dsg>~J' 点击下载更多相关资料
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