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/* nD=N MqQ & **SiteFileFetch.java $bZ5@)E */ fvA167\ package NetFox; w3ZOCWJS import java.io.*; 5<7sVd. import java.net.*; @ xTVX'$ wV4MP1c$ Nfmr5MU_ public class SiteFileFetch extends Thread { h+9~^<oFl }rWg'] j`MK\*qmz SiteInfoBean siteInfoBean = null; //文件信息Bean h6;zAM} long[] nStartPos; //开始位置 "`*
>co6r long[] nEndPos; //结束位置 %e+*&Z', FileSplitterFetch[] fileSplitterFetch; //子线程对象 F$O$Y[ long nFileLength; //文件长度 &NI\<C7_Gw boolean bFirst = true; //是否第一次取文件 }CrWmJu0 boolean bStop = false; //停止标志 i=V2
/W} File tmpFile; //文件下载的临时信息 jk%H+<FU` DataOutputStream output; //输出到文件的输出流 k<rJm
P{ 6O*lZNN //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) >.hDt9@4 public SiteFileFetch(SiteInfoBean bean) throws IOException
M{YN^
Kk { (/!zHq siteInfoBean = bean; Q>L. //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); @q{.shqo tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); nu[["f~ if(tmpFile.exists ()) g5*?2D}dqX { /?}2OCq bFirst = false; /9?yw! read_nPos(); i\o * =+{r } CH5>u else d?/>Qqw:# { SPtx_+ Q)S nStartPos = new long[bean.getNSplitter()]; K4OiKYq nEndPos = new long[bean.getNSplitter()]; TW1#'G_# } X*hPE=2`
p s Dsq:z 7{NH;U t C879eeJ } Z!l]v.S Nema>T] G"Hj$ public void run() :_o^oi7G { oZi{v]4 //获得文件长度 U/h@Q\~U //分割文件 STPRC&7; //实例FileSplitterFetch Lw<.QMN%f //启动FileSplitterFetch线程 Y6(=cm //等待子线程返回 NGW:hgf try{ bE3mOml if(bFirst) 9A9T'g)Du { Qr?1\H:Lq nFileLength = getFileSize(); 8cuI-Swz if(nFileLength == -1) F|8;Sw b5 { 8T"kQB.Zv System.err.println("File Length is not known!"); y-"QY[ } :kd]n$] else if(nFileLength == -2) v8C4BuwA { 7'|aEH System.err.println("File is not access!"); t8*NldC } }?sC1]-j& else EIPX q { y43ha for(int i=0;i<nStartPos.length;i++) v
<OZ
#
L$ { a`LkP% nStartPos = (long)(i*(nFileLength/nStartPos.length)); D?4bp'0 3 } 4EaxU !BT for(int i=0;i<nEndPos.length-1;i++) ieXi6^M$ { 8uA!Vrp3 nEndPos = nStartPos[i+1]; Jw{duM;] } #RHt;SFx nEndPos[nEndPos.length-1] = nFileLength; 6r`Xi& } 4I*'(6
,! } 1had8K- fm
q(! NB-%Tp*d //启动子线程 R{Cbp=3J fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; y>^0q/=]?O for(int i=0;i<nStartPos.length;i++) `Io#440; { h,,B"vPS fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 4b6)+*[O siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ^@Z8_PZo nStartPos,nEndPos,i); ^|2m&2 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); FwD
q@Oj fileSplitterFetch.start(); ^$[iLX } YWL7.Y>%5 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 8i)9ho< siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); z|\n^ZK= // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", 1X9J[5|ll nEndPos = " + nFileLength); ^1_CS* // fileSplitterFetch[nPos.length-1].start(); [\&2& lR]FQnZ @|e
we.r //等待子线程结束 kU.@HJ[@j //int count = 0; =T1Xfib //是否结束while循环 ,T;D33XV boolean breakWhile = false; zMd><UQP{ %Hhk
6tR, Ty7)j]b"zl while(!bStop) ,qNbo
11 { </aQ write_nPos(); DhD##5a Utility.sleep(500); <5}j(jxz} breakWhile = true; : t/0 aX
Ie xC}' "``s for(int i=0;i<nStartPos.length;i++) @#;*e] 1a { \C4wWh-A if(!fileSplitterFetch.bDownOver) <2~DI0pp( { . i^@v<+ breakWhile = false; >7~,w1t break; ngI+afo
} "<^n@=g'q } X-J85b_e if(breakWhile) *kcc]*6@s break; 6~x a^3G: =&(e* u_ 5".bM8o //count++; @.`k2lxGd~ //if(count>4)
'(g;nU< // siteStop(); m_,Jbf } Gl[1K/,* XL'\$f yB 'C9wEH System.err.println("文件下载结束!"); +wQ}ZP& } 2b-g`60< catch(Exception e){e.printStackTrace ();} u6| IKZ } 4;eD}g ,s2C)bb- Kf_xKW)^ //获得文件长度 7PBE(d%m public long getFileSize() ~$hR:I1 { .?LRt int nFileLength = -1; k!'+7K. try{ MU\Pggs URL url = new URL(siteInfoBean.getSSiteURL()); #)]/wqPoW HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); mIqm/5 httpConnection.setRequestProperty("User-Agent","NetFox"); '?g&);4)k- 0Ng?U+6 Wh~,?}laj int responseCode=httpConnection.getResponseCode(); 5)5yH bS if(responseCode>=400) 8si{|*;hL { VT=gb/W6)a processErrorCode(responseCode); PsD)]V9%: return -2; //-2 represent access is error 0rm(i*Q } o[i*i<jv- dDD5OnWmJ O f-xGoYZ String sHeader; S.q0L yK$aVK" b#R$P]dr= for(int i=1;;i++) pS}IU{#; { ~tZB1+%) //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); dnQ6Ras //Utility.log(in.readLine()); sg49a9`8 sHeader=httpConnection.getHeaderFieldKey(i); leI ]zDk= if(sHeader!=null) %~8f0B|im { S?J(VJqE if(sHeader.equals("Content-Length")) `"<hO
'WU { lP*=4Jh nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); `AvK=] break; G6G-qqXy6 }
]qu6/Z } 65*Hf3~~ else c\&;Xr break; \sfc!5G } '> n&3`r5 } hw*u. 46 catch(IOException e){e.printStackTrace ();} [Q J catch(Exception e){e.printStackTrace ();} zufsmY4P h.KgHMV` y,6kL2DM Utility.log(nFileLength); *[*q#b$j }xi?vAaTl V{w &RJ return nFileLength; )Q>Ao. } iA[o;D# @+Sr~:K UUb0[oy //保存下载信息(文件指针位置) |5X59!
JL private void write_nPos() xXa4t4gR { T?6<1nU) try{ $ #2<f 6 output = new DataOutputStream(new FileOutputStream(tmpFile)); FQ`1c[M@
output.writeInt(nStartPos.length); !H{>c@i for(int i=0;i<nStartPos.length;i++) mH4u@aQ} { HavlN}h // output.writeLong(nPos); q-uzu ! output.writeLong(fileSplitterFetch.nStartPos); PAtv#)h output.writeLong(fileSplitterFetch.nEndPos); 9F?-zn;2s } CQ^(/B^c output.close(); 'mTY56Yq } pV_zePyOn catch(IOException e){e.printStackTrace ();} ^;.u}W catch(Exception e){e.printStackTrace ();} :N"&o(^ } qu dY9_ [@8 po-()L kWy@wPqms //读取保存的下载信息(文件指针位置) b-#lKWso private void read_nPos() D6+3f#k6 { "5O>egt try{ a?8)47) DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); v+`'%E int nCount = input.readInt(); R5(([C1 nStartPos = new long[nCount]; }4H}*P> + nEndPos = new long[nCount]; WBkx!{\z for(int i=0;i<nStartPos.length;i++) jm@M"b'{ { D!/ 4u0m nStartPos = input.readLong(); /h.{g0Xc nEndPos = input.readLong(); xpo^\E?2 } #62ThH~ input.close(); hsS&|7Pt } b6sf1E catch(IOException e){e.printStackTrace ();} tcsb]/my catch(Exception e){e.printStackTrace ();} gsM^Pu09ud } |G$-5
7fk sPeTW*HeR Ip=QtNW3\ private void processErrorCode(int nErrorCode) rqdN%=C { vNuws_ System.err.println("Error Code : " + nErrorCode); ITTEUw~+o } EG$-D@o\I W6i9mER- W*CRxGyZCl //停止文件下载 Kg"eS`- public void siteStop() c$L1aZo { gO"G/ bStop = true; ^_DwuY for(int i=0;i<nStartPos.length;i++) Zv=pS
(9 fileSplitterFetch.splitterStop(); $x]/|u/9 lNyyLLt CI-za !T } L?N-uocT } NCG;`B`i //负责部分文件的抓取 92A9gY **FileSplitterFetch.java #OM)71kB8 */ <OKc?[ package NetFox; ag47 $9( alHA&YC{K QT^b-~^ import java.io.*; svl!"tMXl import java.net.*; 6o\uv K<`Z@f3'w l"nS+z public class FileSplitterFetch extends Thread { 3o?eUwI} 'VCuMCV .r6x9t String sURL; //File URL 1Q? RD%lkf long nStartPos; //File Snippet Start Position PlLt^q.z[ long nEndPos; //File Snippet End Position X#JUorGp int nThreadID; //Thread's ID oQu>Qr{Zp boolean bDownOver = false; //Downing is over |Rkw/5 boolean bStop = false; //Stop identical K/f-9hE F FileAccessI fileAccessI = null; //File Access interface 5|K[WvG@Co YW/V}C'> U4K ZPk public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Cb+$|Kg/"b { .udLMS/_ this.sURL = sURL; >c<xy>N this.nStartPos = nStart; UdM2!f this.nEndPos = nEnd; Bl8|`R^g nThreadID = id; Uuu2wz3O0 fileAccessI = new FileAccessI(sName,nStartPos);//定位 w)@Wug } JJ_Z{ ZCc23UwI ]YFjz/f public void run() j7gTVfO { >A-{/"p# while(nStartPos < nEndPos && !bStop) un-%p# { H{=G\N{ d<Q%h?E :adz~L$ try{ OQKg/1 URL url = new URL(sURL); 5>0\= HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); KRT&]2 httpConnection.setRequestProperty("User-Agent","NetFox"); fd>{UyU String sProperty = "bytes="+nStartPos+"-"; -k8sR1( httpConnection.setRequestProperty("RANGE",sProperty); =d^hiR!GN Utility.log(sProperty); W&|?8%"l] 4aBVO%t ppvlU H5; InputStream input = httpConnection.getInputStream(); !8[A;+o3P //logResponseHead(httpConnection); ``VE<:2+ i.)n#@M2 !<=zFy[J.9 byte[] b = new byte[1024]; n(eo_.W2| int nRead; 5!qf{4j while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) *p\Zc*N;% { Kd+E]$F_OH nStartPos += fileAccessI.write(b,0,nRead); m+s*Io{Ip //if(nThreadID == 1) 63Gq5dF // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); +ynhN\S$/ } wyB]!4yy, eQ#i.% %~Rg`+ Utility.log("Thread " + nThreadID + " is over!"); FP=-
jf/ bDownOver = true; Er
j{_i?R? //nPos = fileAccessI.write (b,0,nRead); _&V,yp!|
} FVrB#Hw~ catch(Exception e){e.printStackTrace ();} nf"#F@dk } +<[ q"3 } tR'RB@kJ M`'DD-Q 8Z9>h:c1 //打印回应的头信息 'ZMh<M[ public void logResponseHead(HttpURLConnection con) f7Nmvla[q { Ul]7IUzsu for(int i=1;;i++) JXe~
9/! { ly*v|(S& String header=con.getHeaderFieldKey(i); H(76sE if(header!=null) ]zJO)(d$> //responseHeaders.put(header,httpConnection.getHeaderField(header)); 7UW\|r Utility.log(header+" : "+con.getHeaderField(header)); U.t][#<3 else ]3Ia>i break; !Ea! "} } -;_"Y]# } ,v8e7T |w*s:p Fd<Ouyxqe public void splitterStop() mL`8COA { ,IboPh&Q78 bStop = true; |LQ%sV } ]j/=
x2p *,lDo9 ?|W3RK; } Bt@?l]Y zc)nDyn _p0Yhju? /* Evm3Sm!S **FileAccess.java [=jZP,b&), *//文件访问(定位,写) q%kCTw package NetFox; eu$VKLY* import java.io.*; 9 CZ@IFS _^GBfM. 2ak]&ll+h public class FileAccessI implements Serializable{ k
$^/$N ~"`e9Im //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 hjg1By( RandomAccessFile oSavedFile; .p e3L7g long nPos; Q34u>VkdQI gF)-Ci `f~bnL public FileAccessI() throws IOException ,ESli/6 { f]%SFQ+ this("",0); h?n?3x!( } _%2ukuJ ` `0]N#G
T GZrN,M public FileAccessI(String sName,long nPos) throws IOException hfY/)-60o { EEZ~Bs}d oSavedFile = new RandomAccessFile(sName,"rw"); lF/
Xs this.nPos = nPos; "]]LQb$ oSavedFile.seek(nPos); )yig=nn } ?B ,<gen #!O)-dyF Jaw1bUP!oK public synchronized int write(byte[] b,int nStart,int nLen) !|4]V}JQ { 06AgY0\ int n = -1; 1DcBF@3sWG try{ Q}B]b-c+E oSavedFile.write(b,nStart,nLen); \a;xJzc9 n = nLen; -avxH?;?7 } >e6 OlIW catch(IOException e) hIqU idJod { N80ogio_Tk e.printStackTrace (); AA,/AKikd } nD
eVY K uNuFD|aQ. nsi?.c&0! return n; OjlX<y. } E%v0@ *> nOL bskoi;)u } p#P<V% QjSWl,{
$D P<&bAsje /* FNLS=4 **SiteInfoBean.java 3h.,7,T */ eJ45:]_%I@ package NetFox; N(4y}-w$ }gXhN" JGvhw,g public class SiteInfoBean { 3;Yd" qdpi-*2 -(
p%+` private String sSiteURL; //Site's URL gkxHfm private String sFilePath; //Saved File's Path *l
=f= private String sFileName; //Saved File's Name \f4rA?+f private int nSplitter; //Count of Splited Downloading File e'$[PF qQ)1+^ -|}?+W public SiteInfoBean() 9rz$c, Y( {//nSplitter的缺省值为5 'q:7PkN!p //default value of nSplitter is 5 LRu*%3xx this("","","",5); yKj}l,i~8 } +zch e %eofG]VM< /Lr`Aka5 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) *)w+xWmM3w { /Q7q2Ne^* sSiteURL= sURL; aG;F=e sFilePath = sPath; H:hM(m0?q sFileName = sName; Dmi.@. this.nSplitter = nSpiltter; 9b=0
4aWHm Z|*#)<|~ l9|K,YVW } zT)cg$8%fY .>TG{>sH Ua|iAD1 public String getSSiteURL() :X}SuM?c { S{l)hwlE return sSiteURL; Q .Nw#r+m } Fl($0}ER o[KZm17 :t`W&z41 public void setSSiteURL(String value) oZ/"^5 { GO2q"a sSiteURL = value; Pi5MFw'v } !\{2s!l~ r3' DXP ?F]P=S:x public String getSFilePath() Xux[ { |(Wwh$ return sFilePath; *V:U\G } ;0m J4G NX%1L!
# 6|q"lS*$S public void setSFilePath(String value) 6p)&}m9! { J/Y9 X, sFilePath = value; 55.2UN } PCaFG;} L`<#vi WG A&Lr public String getSFileName() 46)[F0,$r { C TG^lms return sFileName; V2?{ebx` } yc]_ ?S>9 "4WnDd5" +pT;;
9 public void setSFileName(String value) Jxe 5y3*
( { g,WTXRy sFileName = value; T2]8w1l&K } .?g=mh79( ku*k+4rz qk'&:A public int getNSplitter() Y1r'\@L w { vA:ZR=)F return nSplitter; p#4*:rpq4 } Xlug{ Uh \6a' p
Q, rU9")4sQ public void setNSplitter(int nCount) PO'K?hVS^w { lGp:rw` nSplitter = nCount; {~51h}>b# } L''VBY"? } p@Os ^pe/~ :a 8d'/w}GV /* ) C~#W **Utility.java \ CcVk"/ */ LEnv/t6U package NetFox; y'2w*? "'``O~08/ 1r.2bL*~jw public class Utility { @qcUxu 4 9(HGe+R4o @+M1M2@Xz public Utility() \NDW@!X { AX{<d@z`j rT;l#<#VE Z-CA9&4Uh } -6_<] n)a/pO_ //线程睡眠 lgVT~v{U`n public static void sleep(int nSecond) }Tm+gJA { +K'YVB
U} try{ (L4C1h_]9 Thread.sleep(nSecond); 34)l3UI~ } })@xWU6! catch(Exception e) C<:wSS^@1 { 0# 1~'e e.printStackTrace (); P;y!Y/$ C } ^=-25%&^ } lws.;abm%n !}P^O(oY //日志 [m< jM[w{ public static void log(String sMsg) :+9. v { k
"7,-0gz System.err.println(sMsg); d/oD]aAEr } h8.(Q`tli 0nI*9 `3[W~Cq public static void log(int sMsg) tD}{/`{_t { !Y UT* System.err.println(sMsg); Q rSO%Rm1* } h
Ks
} Wn;%B].I fOSJdX0e|Q mBrZ{hqS /* h8M}} **TestMethod.java /;q3Q# */ ;H%'K package NetFox; ,{iMF
(Nj po]<sB FR50y+h^$ public class TestMethod { 9P
<1/W! Wkb>JnPo ~9!@BL\ public TestMethod() 9@M;\ @&g { ///xx/weblogic60b2_win.exe eUa:@cA try{ ri3*~?k00 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); pkG8g5(w //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); VWXyN SiteFileFetch fileFetch = new SiteFileFetch(bean); gQhYM7NP{5 fileFetch.start(); c2GTN " } k?3mFWc catch(Exception e){e.printStackTrace ();} qixnaiZ _ !"[Zr buKkm$@w } A;/,</ 3,#qt}8` S>HfyZ&Pc public static void main(String[] args) }{J>kgr6 { ed/
"OgA new TestMethod(); ?gK|R } :[_k .1-+ } f0g_Gn $ 点击下载更多相关资料
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