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/* ~-<MoCm! **SiteFileFetch.java h@E7wp1'~ */ ]1FLG*sB package NetFox; lJ]]FuA-Q import java.io.*; zYrJHn#vB import java.net.*; nY7gST &wAVO_s m]vS"AdX public class SiteFileFetch extends Thread { X% )~i[_DV 8>@JW] jST4O"DjM SiteInfoBean siteInfoBean = null; //文件信息Bean 35Fxzj $ long[] nStartPos; //开始位置 O6/:J#X% long[] nEndPos; //结束位置 HKr}"`I. FileSplitterFetch[] fileSplitterFetch; //子线程对象 iciKjXJ: long nFileLength; //文件长度 #i.,+Q boolean bFirst = true; //是否第一次取文件 ZNne 8 boolean bStop = false; //停止标志 #}Yrxf File tmpFile; //文件下载的临时信息 DuNindo8 DataOutputStream output; //输出到文件的输出流 c<, LE@V NT0n[o^ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) 8\"Gs z public SiteFileFetch(SiteInfoBean bean) throws IOException }zks@7kf { t7l{^d_L siteInfoBean = bean; 5F+G8 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); T60pw tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); n\)1Bz if(tmpFile.exists ()) 7nNNc[d*= { CIz0Gjtx6m bFirst = false; pU9.#O read_nPos(); 5RvE ), } 1
_Oc1RM else JOpH
Z? { T>]T= nStartPos = new long[bean.getNSplitter()]; &e6UEG nEndPos = new long[bean.getNSplitter()]; r<vy6 } 3<Zp+rD xu_,0ZT]{ 'B{FRK 3:MJKS02OD } 5VP0Xa ~ WPkKbF 2cUT bRm public void run() /q+;!EM { F@k}p-e~ //获得文件长度 9Q^cE\j //分割文件 qC{JsX`~ //实例FileSplitterFetch |ZE^'e*k //启动FileSplitterFetch线程 t"Ci1"U //等待子线程返回 En1LGi4# try{ u -P !2vT if(bFirst) RYA@{.O { !b7"K| nFileLength = getFileSize(); }dop]{RG if(nFileLength == -1) EwX&Cj". { I-Z|FKh_C System.err.println("File Length is not known!"); vue^bn } *
eC[74Kng else if(nFileLength == -2) );':aXj { +^lB"OcOX@ System.err.println("File is not access!"); ?WHf%Ie2( } # H
w(w else iX6>u4~( { Vn4wk>b}$2 for(int i=0;i<nStartPos.length;i++) :u./"[G { GE(~d ' nStartPos = (long)(i*(nFileLength/nStartPos.length)); 3PGAUQR#"q } _<LL@IX for(int i=0;i<nEndPos.length-1;i++) @U18Dj[ { MNWI%*0LO nEndPos = nStartPos[i+1]; Fu_I0z } VK]U* V1 nEndPos[nEndPos.length-1] = nFileLength; UL-_z++G } sa4w.9O1GS } J6n>{iE T"[]'|' $GFR7YC 7 //启动子线程 Mn(iAsg fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; Z.Yq)\it for(int i=0;i<nStartPos.length;i++) z,G_&5|f% { hp)^s7H fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Cl`i|cF\ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), _yv#v_Z nStartPos,nEndPos,i); c%C6d97q Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); >i,_qe?V:w fileSplitterFetch.start(); 1*9.K' } &K\80wGK // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), :${tts2g siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); #G77q$ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", UMR ?q0J nEndPos = " + nFileLength); vUJ;D // fileSplitterFetch[nPos.length-1].start(); 8Rwk
o6x u*G<? a&x:_vv //等待子线程结束 )^ Y+Vn //int count = 0; X n$ZA- //是否结束while循环 R,G*]/r` boolean breakWhile = false; :R,M Y"( Ha `N nf/?7~3?[ while(!bStop) b/'c
h { Mg.%&vH\ write_nPos(); X+aQ 7^"s Utility.sleep(500); = 'NV3by breakWhile = true; hr}f5Z)^v &7f8\TG| _ \6v@ for(int i=0;i<nStartPos.length;i++) &
"&s, { G n]qh(N> if(!fileSplitterFetch.bDownOver) &bW,N { <ToBVGX breakWhile = false; Lj3o-@\*j break; h6
{vbYj } Nv7-6C6< } }+9?)f{?@ if(breakWhile) KOS0Du break; H\Ra*EO~j 8u+kA
mI N s +g9+<A //count++; g0tnt)] //if(count>4) ?`piie9V // siteStop(); YpDJ(61+ } z6iKIw
$ 25)9R^ TC?B_;a System.err.println("文件下载结束!"); $V(]z`b& } I "AjYv4R catch(Exception e){e.printStackTrace ();} ^m w]u"5\ } x,,y}_YX Io]FDPN V.P<>~W //获得文件长度 ma~#E$i& public long getFileSize() iYStl { F3}MM
dX int nFileLength = -1; {h?pvH_> try{ &J6`Q<U! URL url = new URL(siteInfoBean.getSSiteURL()); N&NBn( HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); }`B
.(3n httpConnection.setRequestProperty("User-Agent","NetFox"); _]`7et\= ,Z@#( =f _J
l(:r\% int responseCode=httpConnection.getResponseCode(); ]nhh|q9r{ if(responseCode>=400) #{8IFA { @f-X/q]P processErrorCode(responseCode); ST*h{:u&A return -2; //-2 represent access is error N-M.O:p } hpAdoy[ a;HAuy`M x t )zd'[ String sHeader; xol%\$| %e E^Y<@g 9(N for(int i=1;;i++) 1Z# $X` { vA/SrX. //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); >!=@TK(~ //Utility.log(in.readLine()); d05xn7%!{ sHeader=httpConnection.getHeaderFieldKey(i); .11l(M if(sHeader!=null) 1>J.kQR^ { M~taZt4 if(sHeader.equals("Content-Length")) N(&{~*YE { 4XN
\p nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); !=dz^f.{ break; uY&1[(Pb } l_^OdQ9D } ,X?/FAcb else *-T.xo break; (;l@d|g } RQ,#TbAe } l 00i2w catch(IOException e){e.printStackTrace ();} cc[(w
#K catch(Exception e){e.printStackTrace ();} #fuUAbU0X 3B1\-ry1M / FcRp ," Utility.log(nFileLength); 3V k8' VE )D4RL Q|(}rIWOQA return nFileLength; P@7>R7gS } QQl.5'PP LZykc
c9g hFIh<m=C?Y //保存下载信息(文件指针位置) v)5;~.+% private void write_nPos() 6 4_}"fU { Fw<"]*iu try{ #1<m\z 7l output = new DataOutputStream(new FileOutputStream(tmpFile)); C]L)nCOBX output.writeInt(nStartPos.length); 51k}LH for(int i=0;i<nStartPos.length;i++) W:r[o%B { <o(;~ // output.writeLong(nPos); C>Ik ; output.writeLong(fileSplitterFetch.nStartPos); (!}N&!t output.writeLong(fileSplitterFetch.nEndPos); 6Og@tho } 8+'}` output.close(); T)! }Wvv } <XeDJ8
' catch(IOException e){e.printStackTrace ();} k1B
](@xt catch(Exception e){e.printStackTrace ();} ~fXNj-'RW } uKJ:)oyaCP ,P~e)<. Cd%5XD^ //读取保存的下载信息(文件指针位置) F-;J N private void read_nPos() ?@"@9na { i2qN 0?n try{ V;SfW2`) DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); +Br<;sW int nCount = input.readInt(); C
@Ts\);^ nStartPos = new long[nCount]; %KyZ15_(-L nEndPos = new long[nCount];
M^kaik for(int i=0;i<nStartPos.length;i++) db )2> { ZX_QnSNZ? nStartPos = input.readLong(); :|j[{;asY nEndPos = input.readLong(); 3!P^?[p3 } kepuh%KY[
input.close(); +Y?Tr i } 4!!|P catch(IOException e){e.printStackTrace ();} uz3cho' catch(Exception e){e.printStackTrace ();} 0AnL]`"t.3 } Z!v,;MW #]Vw$X_S ^A ]4 private void processErrorCode(int nErrorCode) ~A0AB
`7 { Q
8]X System.err.println("Error Code : " + nErrorCode); Zr}>>aIJ]k } tY_=[6?Zu TXB!Y!RG# oIrc))j,$ //停止文件下载 L91(|gQP public void siteStop() W8<QgpV* { }cz58% bStop = true; 0hS&4nW for(int i=0;i<nStartPos.length;i++) ZRhk2DA#FF fileSplitterFetch.splitterStop(); 4W>DW`{ >Iij,J5i orJ|Q3c)d } Kj0)/Fjl+ } }%KQrlbHJl //负责部分文件的抓取 &tOo[U? **FileSplitterFetch.java GVT 6cR */ X}[1Y3~y package NetFox; " lD -*e4 n l5+#e*\ B+FTkJ0t+G import java.io.*; %Vo'\| import java.net.*; eGMw:H {Lju7'5L yc0
1\o public class FileSplitterFetch extends Thread { #mH28UT TrDTay )+FnwW String sURL; //File URL y1`%3\ long nStartPos; //File Snippet Start Position 6~ET@"0uK long nEndPos; //File Snippet End Position 0Cc3NNdz int nThreadID; //Thread's ID [?z;'O}y boolean bDownOver = false; //Downing is over Va[&~lA) boolean bStop = false; //Stop identical #W:.Fsq FileAccessI fileAccessI = null; //File Access interface qRT5|\l s\.r3U&6 ,>6mc=p public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 65B&>`H~ { hQ3@Cf W this.sURL = sURL; 4gZ R!J this.nStartPos = nStart; b?k,_;\ this.nEndPos = nEnd; ruhC:rg:/ nThreadID = id; :Nz
TEK fileAccessI = new FileAccessI(sName,nStartPos);//定位 aeMj4|{\ } FkMM>X j+.E#:tu" FkaQVT public void run() p7},ymQ|YQ { 9'X "a while(nStartPos < nEndPos && !bStop) "dG*HKrr { ml~)7J $1X!Ecq_ N]BH6 7< try{ `34+~;;Jh URL url = new URL(sURL); UeUOGf , HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); j;Z
hI y httpConnection.setRequestProperty("User-Agent","NetFox"); "97sH_
, String sProperty = "bytes="+nStartPos+"-"; MO]zf3f! httpConnection.setRequestProperty("RANGE",sProperty); 9aID&b+ Utility.log(sProperty); !ggHLZRlz T+V:vuK $SLyI$<gP InputStream input = httpConnection.getInputStream(); 0l(G7Ju //logResponseHead(httpConnection); *{fZA;<R Ornm3%p+e IFSIQ
q byte[] b = new byte[1024]; V2Z^W^ int nRead; 'mU\X!-
4< while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) CJ;D&qo { ZU:c[` nStartPos += fileAccessI.write(b,0,nRead); q|.0Ja //if(nThreadID == 1) Dhft[mvo // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); B)DtJf } 17rg!'+ ipiS= 5N>L|J2 Utility.log("Thread " + nThreadID + " is over!"); .v) A|{:2 bDownOver = true; $a')i<m^g //nPos = fileAccessI.write (b,0,nRead); mqQ//$Y
} B3u:D"t catch(Exception e){e.printStackTrace ();} BBoVn^Z*R } Xt*h2& } :JxuaM8 ?cr^.LV|h^ (
Qk*B //打印回应的头信息 -A8CW9|mk public void logResponseHead(HttpURLConnection con) }8'bXG+ { jW|M)[KJN for(int i=1;;i++) BfvvJh_ { orF8% String header=con.getHeaderFieldKey(i); xirZ.wj W if(header!=null) v3/G.B@= //responseHeaders.put(header,httpConnection.getHeaderField(header)); H+5N+AKb@ Utility.log(header+" : "+con.getHeaderField(header)); l;J B;0<s" else "CQ:<$|$ break; [{-;cpM\ } K30{Fcb< h } r/ LgmVRn cr{f*U6` 7OZjLD{ID public void splitterStop() \H?r[]*c% { "Kn%|\YL@4 bStop = true; [1`&\C_E } 4q^'MZm1 lGN{1djT [)p>pA2GZj } I_h&35^t 7gbu7"Qc Pu|3_3^ /* 7NfA)$ **FileAccess.java *p%=u>?& *//文件访问(定位,写) [lAZ)6E~= package NetFox; 4}HY= 0Um import java.io.*; >uDE<MUC Bt-2S,c,o |rk4,NG. public class FileAccessI implements Serializable{ -6>T0- 7%^/Jm //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ^5*9BwH` RandomAccessFile oSavedFile; h.h\)>DM@ long nPos; ^b`aO$ w
]$Hr h>'Mh;+ public FileAccessI() throws IOException Ut^ {4_EC { V> @+&q this("",0); HO
=\ } 0=KyupwXC ;bt%TxuKb 0)-yLfTn public FileAccessI(String sName,long nPos) throws IOException r5\|%5=J { 5"9!kZ(< oSavedFile = new RandomAccessFile(sName,"rw"); [E|% this.nPos = nPos; iwnFCZVS oSavedFile.seek(nPos); rXu^]CK
*G } &,~Oi(SX5 aRF}FE,u G$$y\e$ public synchronized int write(byte[] b,int nStart,int nLen) 4brKAqg. { dJD8c2G int n = -1; ?Q%X,!~\: try{ 0T7""^'& oSavedFile.write(b,nStart,nLen); gCY%@?YyN n = nLen; Z |CL:)h } -mK;f$X catch(IOException e) EG[Rda { |.Y}2>{ e.printStackTrace (); "_
i: } .a`(?pPr, aqzIMOAf aaM76; return n; f&
>[$zh } 8!(09gW'> VsM~$
) "xKykSk } ?B~S4:9 gG6j>%y o\;cXuh /* =;?afUj **SiteInfoBean.java fC$(l@O? */ ijR,% qg package NetFox; 7awh__@ [b6P
}DW WvJidz?5 public class SiteInfoBean { ;HbAk`\1A ^6(Nu|6\@ @is !VzE
private String sSiteURL; //Site's URL TO~Z6NA0 private String sFilePath; //Saved File's Path >")<pUQ private String sFileName; //Saved File's Name Tweku}D7 private int nSplitter; //Count of Splited Downloading File w5uOkz # RO+N>Wkt HJeZm public SiteInfoBean() eQqx0+-0c {//nSplitter的缺省值为5 TcM;6h` //default value of nSplitter is 5 $(8CU$gi= this("","","",5); I=G-(L/& } (!B1}5" nkn4VA?" ^>ICycJ public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) yTb#V"eR { JcDcYB sSiteURL= sURL; c Y(2}Ay sFilePath = sPath; 5b5Hc Inu sFileName = sName; R
*uwp'@ this.nSplitter = nSpiltter; 7)#8p@Q i~0x/wSl_ 3"HW{= } $\A=J LaCVI 2j
<Y>Y public String getSSiteURL() n3Q Rn^ { }5qpiS"V9 return sSiteURL; $zUHka } Yg kd 1uI. l" P3lKS E6Uiw]3 public void setSSiteURL(String value) O4.`N?Xq {
vle`#c. sSiteURL = value; r#X6jU } MGU%"7i'} .L#U^H| rZSD)I public String getSFilePath() 0c6Ea>S[ { 8.m9 =+)8 return sFilePath; ]w;!x7bU( } e"O c Z]\VOA> !xxdC
public void setSFilePath(String value) ]oIP;J:& { 1HS43! sFilePath = value; @&xWd{8' } [ qx[ 0 '`nf7b( VY|'7in"M public String getSFileName() :'0. { DP5}q"l return sFileName; la}Xo0nq0+ } Yw_^]:~ mo()l8 /fDXO;tN public void setSFileName(String value) f~?4 { !}pvrBS sFileName = value; ews{0 } A$o7<Hx Lsb` ,: FX,kmre3 public int getNSplitter() KqhE=2, { i_<GSUTTr/ return nSplitter; /=IBK` } &~{0@/ >o,l/#z 1 ` ={** public void setNSplitter(int nCount) VteMsL/H { YM.Q?p4g nSplitter = nCount; DICS6VG} } 5|_El/G } 3K{G =WE$ 6s(.ul %&}gt+L(M /* fZka$
4 **Utility.java vMv?
fE" */ f)#rBAkt package NetFox; w)7 s]Ld |B~^7RHXo .hVB)@/ public class Utility { "l[ c/q[ +b_o2'' g?OC-zw public Utility() wT@{=s, { }>$3B5} sX[k}=HCK -a\[`JHi } !}I+)@~\w ={[9kR i //线程睡眠 bSgdVP- public static void sleep(int nSecond) $*q^7ME { S\<nCkE^ try{ !>,XK!) Thread.sleep(nSecond); N4rDe]JnPR } 7;r Jr&.) catch(Exception e) X]+z:! { "rU
2g e.printStackTrace (); #,B+&SK{ } k.<OO } 8d1r#sILI ,
G9{: //日志 >eM>Y@8= public static void log(String sMsg) N.F//n { B
x-"<^< System.err.println(sMsg); W!B\VB } w
21g& CX3yIe~u %Fp1c K public static void log(int sMsg) vugGMP;D( { 4RL0@)0F System.err.println(sMsg); |] cFsB#G } D*}_L
} iTcq= [Ufx=BPx3 }UX0 eI4 /* |f{(MMlj **TestMethod.java ,%d?gi"& */ 2#)z%K6T package NetFox; lcfX(~/m^ sg%Ptp N:~CN1 public class TestMethod { Ng|c13A= 'LMMo4o3 nh*hw[Ord public TestMethod() )SzgMbF6 { ///xx/weblogic60b2_win.exe a?1Ml>R6P try{ 'bn$"A"{o SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); m<I>NYfE //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); <_3OiU=w SiteFileFetch fileFetch = new SiteFileFetch(bean); lQKq{WLFx. fileFetch.start(); WY$c^av< } vocWV/ catch(Exception e){e.printStackTrace ();} i{biQ|,.sL ?5j}&Y3 QE4TvnhK } )QAS 7w#k FwwOp"[~t |m F=X* public static void main(String[] args) -jk-ve { =`E{QCW new TestMethod(); Ft<B[bQ } :rSCoi>K } ~%!"!Z4 点击下载更多相关资料
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