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/* kS@9c _3S **SiteFileFetch.java hEyX~f */ l-DGy# h+z package NetFox; J0IdFFZ|w import java.io.*; m1^dT_7Z
import java.net.*; *%ed;>6:Q :pA=V N+Q(V*:3v public class SiteFileFetch extends Thread { e8~62O^ 9f@#SB_H 30sC4} SiteInfoBean siteInfoBean = null; //文件信息Bean fK)ZJ_?w,@ long[] nStartPos; //开始位置 y8<lp+ long[] nEndPos; //结束位置 c,6<7 FileSplitterFetch[] fileSplitterFetch; //子线程对象 "i!2=A8k long nFileLength; //文件长度 &LCUoTzj boolean bFirst = true; //是否第一次取文件 2 ||KP|5@ boolean bStop = false; //停止标志 %f_)<NP9= File tmpFile; //文件下载的临时信息 !~Hafn-1 DataOutputStream output; //输出到文件的输出流 W+#}~2&Dv 4FfwpO3,Ku //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ?c|`R1D public SiteFileFetch(SiteInfoBean bean) throws IOException U6/m_`nc { :0J-ek.; siteInfoBean = bean; "'Q" (S //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); kr/1Dsr4 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); eEZ|nEU if(tmpFile.exists ()) K B`1% = { qB+:#Yrx/ bFirst = false; ~ERRp3Ee? read_nPos(); jyY ^iQ.2 } cc2d/<: else ?`vM#) { t7U,AQ=;P5 nStartPos = new long[bean.getNSplitter()]; 4=?Ok":8 nEndPos = new long[bean.getNSplitter()]; >K_$[qP3 } /o<}]]YBF Ev$-PX ;[WSf{k |1_$!
p } w*&n(zJF> 'T&=$9g7 ? e9XVQ* public void run() D+*uKldS; { gTmUK{y' //获得文件长度 e 5WdK //分割文件 >6.[i@RmWU //实例FileSplitterFetch o+if%3 //启动FileSplitterFetch线程 4e(9@OLP //等待子线程返回 $>S}acuC try{ C*W.9 if(bFirst) I:uQB! { (/9.+V_ nFileLength = getFileSize(); Ovaj":L if(nFileLength == -1) +eV4g2w) { By51dk7 System.err.println("File Length is not known!"); S5*~r@8h } c{]r{FAx9o else if(nFileLength == -2) &9RW9u " { e-Ybac% System.err.println("File is not access!"); x8SM,2ud } 6KIjq[T^ else 5Gw!9{ke { K-"HcHuF for(int i=0;i<nStartPos.length;i++) 3zA8pI w { a.Rp#}f nStartPos = (long)(i*(nFileLength/nStartPos.length)); 1,%#O;ya } `aO@N( for(int i=0;i<nEndPos.length-1;i++) RF,=bOr19 { t]u(jX) nEndPos = nStartPos[i+1]; 7tf81*e } T;4gcJPn"M nEndPos[nEndPos.length-1] = nFileLength; !7Yt`l$$z } lt2Nwt0bv } ^;Hi/KvM\ 3G%XG{dg !Z+*",]_ //启动子线程 5ykk11!p$ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; U'h[{ek for(int i=0;i<nStartPos.length;i++) )L(d$N=Bd { 'n>3`1E, fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), J1c&"Oh siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), bzj!d|T` nStartPos,nEndPos,i); `:bvuc( Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); #v~S",*.f fileSplitterFetch.start(); Q#J>vwi= } >F\rBc& // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >arO$|W siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 7n\j"0z // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", (4{@oM#H6 nEndPos = " + nFileLength); ?;.1fJU> // fileSplitterFetch[nPos.length-1].start(); sjkKaid '^-4{Y^2E RBK>Lws6 //等待子线程结束 cDQw`ORP*g //int count = 0; G0 nH Z6 //是否结束while循环 yqVaA 'w5 boolean breakWhile = false; *OGXu07 ! @E"+qPp.3 ;@7#w while(!bStop) p^zEfLTU { %<ptkZK# write_nPos(); ^7s6J{< Utility.sleep(500); %)6:eIS breakWhile = true; zfr (dQ 3 R:7bex Qq FfR# for(int i=0;i<nStartPos.length;i++) xV n]m9i { Cs1%g if(!fileSplitterFetch.bDownOver) Nz>E#.++ { a`@<Z sR breakWhile = false; jB/q1vFO break; X_tW#` } o+)LcoPu } kq1M<lk if(breakWhile) |q!2i break; N5w]2xz! )q]j?Z. (g)lv)4P //count++; G|PIH# //if(count>4) R0YC:rAt // siteStop(); Dho^^<`c+ } /4-eoTxy c@o/Cv dV2b)p4J System.err.println("文件下载结束!"); EhP&L?EL } W-]yKSob catch(Exception e){e.printStackTrace ();} |E_+*1l q. } r/q1&*T cV,03]x YZ%f7BUk //获得文件长度 fssL'DD public long getFileSize() 4KSP81}/\ { $OFFH[_z int nFileLength = -1; XUqE5[O% try{ jXDzjt94J URL url = new URL(siteInfoBean.getSSiteURL());
Uhx2 _ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 7dg
5HH httpConnection.setRequestProperty("User-Agent","NetFox"); n xh/&% C@?e`=9( %`T^qh_dE int responseCode=httpConnection.getResponseCode(); *(SBl}f4l if(responseCode>=400) A$"$`)P! { #u=O 5%. processErrorCode(responseCode); Ff#N|L'9_ return -2; //-2 represent access is error fN*4(yw } ,YMdXYu`s k#=leu"I u,SX`6% String sHeader; yA>p[F knK=ENf;e ;'18 for(int i=1;;i++) _8b>r1$ { vVN[bD< //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); "6NNId|Y //Utility.log(in.readLine()); v!'@NW_ sHeader=httpConnection.getHeaderFieldKey(i); {u=\-|t if(sHeader!=null) n$![b_)* { DwrCysIK if(sHeader.equals("Content-Length")) ?e_}X3{ { R?9Plzt5 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); K{w=qJBM break; k;:u| s8NS } F=T.*-oS3 } eg~^wi else pu)9"Ad[ G break; BK\~I } "$"mWF- } <$3nD b- catch(IOException e){e.printStackTrace ();} .
;@)5" catch(Exception e){e.printStackTrace ();} !RUo:b+ Lp]C![\>U (uK), *6B Utility.log(nFileLength); 1]3bx N 4a \+o] ]jY)M<:J4 return nFileLength; n]{}C.C= } |b;M5w? 6C51:XQO oD}FJvV //保存下载信息(文件指针位置) j83Y'VJJC private void write_nPos() =$zr
t { }]GK@nn7 try{ 5sCky)N output = new DataOutputStream(new FileOutputStream(tmpFile)); "u]Fl+c output.writeInt(nStartPos.length); 8}0y)aJ for(int i=0;i<nStartPos.length;i++) wG[l9)lz { Y(yJ|y& // output.writeLong(nPos); i\z0{;f|GX output.writeLong(fileSplitterFetch.nStartPos); PaeafL65= output.writeLong(fileSplitterFetch.nEndPos); adE0oXQH" } IlL output.close(); v%7JZ<I'A } IguG03:.N catch(IOException e){e.printStackTrace ();} PWD]qtr catch(Exception e){e.printStackTrace ();} :8L61d2( } gV44PI6h R]sjG< GQ)cUrXQz //读取保存的下载信息(文件指针位置) <:7e4# private void read_nPos() ;3}b&Z[N] { d@4=XSj try{ KIY_EE$? DataInputStream input = new DataInputStream(new FileInputStream(tmpFile));
8=Y|B5 int nCount = input.readInt(); 43Uy<%yb>} nStartPos = new long[nCount]; VQ;-
dCV nEndPos = new long[nCount]; r$eL-jQmn for(int i=0;i<nStartPos.length;i++) 3K:Xxkk { XBt0Ez nStartPos = input.readLong(); 5h^qtK nEndPos = input.readLong(); (9_e>2_ }
F%$Ws>l input.close(); 00wH#_fm } uOUw8 catch(IOException e){e.printStackTrace ();} 2}\sj'0& catch(Exception e){e.printStackTrace ();} ZS>/ 5 } n?fC_dy
I%*Zj,> IX3yNTW"L private void processErrorCode(int nErrorCode) um;U;%?Q { 5P2FNUKL System.err.println("Error Code : " + nErrorCode); 4qR Q,g{$T } ;ypO' 54_m{&hb =|zLr" //停止文件下载 o@~gg* public void siteStop() 2qR@:^ { TEyPlSGG bStop = true; #{`NJ2DU] for(int i=0;i<nStartPos.length;i++) {"(|oIo{ fileSplitterFetch.splitterStop(); BU\NBvX$ cJ{P,K -;.fU44O[# } }(O
kl1 } 1L9
<1 //负责部分文件的抓取 m,fr?d/; **FileSplitterFetch.java Qn cS& */ |8+rUFkU8 package NetFox; L| qY X
KeK;+ w8Vzx8 import java.io.*; md_s2d import java.net.*; p)]^>-L
0d)n}fm uV\#J{'* public class FileSplitterFetch extends Thread { 3VgH*vAU} ?Ir6*ZyY \s rOU| String sURL; //File URL $jL.TraV7 long nStartPos; //File Snippet Start Position uty]-k long nEndPos; //File Snippet End Position L)"w-,zy int nThreadID; //Thread's ID [vJosbU; boolean bDownOver = false; //Downing is over _\]UA?0 boolean bStop = false; //Stop identical cl8Mv FileAccessI fileAccessI = null; //File Access interface w8zQDPVB% :{i mRa- EE{%hGb public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException sAj$U^Gp { 1x8]& this.sURL = sURL; (VRnv this.nStartPos = nStart; a[#BlH this.nEndPos = nEnd; Ho9*y3] nThreadID = id; ~_6rD`2cJ fileAccessI = new FileAccessI(sName,nStartPos);//定位 1O{67Pf } RT9|E80 @72G*u\Wz 'a9.JS[pj public void run() u(qpdG||7 { Y*Rqgpu
$
while(nStartPos < nEndPos && !bStop) eVJL|uI| { P=g+6-1 KJ
|1zCM oOvbel`; try{ \8H"lcj: URL url = new URL(sURL); oOw"k*,h:S HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Cq'r
'cBZ httpConnection.setRequestProperty("User-Agent","NetFox"); lTNkm Q String sProperty = "bytes="+nStartPos+"-"; -UE-v httpConnection.setRequestProperty("RANGE",sProperty); |MGw$ Utility.log(sProperty); aUQq<H 'R z(` kWF1< OTm"Iwzu@ InputStream input = httpConnection.getInputStream(); Ds$;{wl#x //logResponseHead(httpConnection); *9 xD]ZZF |9@;Muq; 83|/sWrvh byte[] b = new byte[1024]; @ZWKs
int nRead; /$Jh5Bv while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) !o7.L%S { Iu]P^8 nStartPos += fileAccessI.write(b,0,nRead); l$NEx0Dffz //if(nThreadID == 1) e;v2`2z2 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3J{'|3x } z5zm,Jw P#]jPW 8;@eY`0( Utility.log("Thread " + nThreadID + " is over!"); 4+Kc bDownOver = true; {M5IJt"{4b //nPos = fileAccessI.write (b,0,nRead); dzap]RpB } ^8*.r+7p catch(Exception e){e.printStackTrace ();} P=GM7 } g [K8G } EJsb{$u ""=Vt] NiF*h~q //打印回应的头信息 n~)%ou public void logResponseHead(HttpURLConnection con) (TsgVq]L {
C .Yz<?;S for(int i=1;;i++) 0
$r{h}[^c { 5VS<I\o} String header=con.getHeaderFieldKey(i); R8]bi|e) if(header!=null) t `oP; //responseHeaders.put(header,httpConnection.getHeaderField(header)); aeIR}'H| Utility.log(header+" : "+con.getHeaderField(header)); x3
<Lx^; else G#>nOB break; s4\2lBU? } -u(#V#}OV? } KA7nncg;, yCVBG : nn'> public void splitterStop() xMu6PM<l { )XWL'':bF bStop = true; N[%IrN3 } Ex{]<6UAu `K.yE0^i o>h>#!e } G5Nub9_*X y+_U6rv[ 4ai3@f5 /* W3#L!&z_wK **FileAccess.java 5Dd;?T> *//文件访问(定位,写) Z(cgI5Pu
package NetFox; VEk|lX;2 import java.io.*; .)Q'j94Q >jIc/yEYKI NUseYU`` public class FileAccessI implements Serializable{ d#su 6/) A6Tt //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 Cq=c'(cX RandomAccessFile oSavedFile; Yi3DoaS;" long nPos; kBkhuKd)V +=QboUN u&:jQ:[ public FileAccessI() throws IOException YZd4% zF { x1Uj4*Au this("",0); Zv_<*uzKZ } x$t=6@<] 8w4.|h5FP 9(Z)c public FileAccessI(String sName,long nPos) throws IOException wS*UXF&f { bk|>a=o3 oSavedFile = new RandomAccessFile(sName,"rw"); I[/u5V_b' this.nPos = nPos; H
Zc;.jJ oSavedFile.seek(nPos); iD9GAe}x } "Y6f.rB !Wk "a7 ]#;JPO#* public synchronized int write(byte[] b,int nStart,int nLen) zB4gnVhus| { juM?y'A int n = -1; &j$k58mX try{ !^%b|=[ oSavedFile.write(b,nStart,nLen); %%#zO
Z n = nLen; 5E]I } %NuS!v> catch(IOException e) Sn0 Gw { A-kI_&g\Og e.printStackTrace (); +Z+]Tqo } 2X:n75() pq4frq j`bOJTBE return n; QAr1U7{(. } SExd-=G F C"dQ Y0DBkg } &( Z8G~h4 |o`TRqs P+JYs /* ;G?_^ 0 **SiteInfoBean.java Z^b1i`v */ R lv|DED$ package NetFox; S;=
D/)[mr D`+'#%%x 8"? t6Z;5 public class SiteInfoBean { AO/R2a(: +%0+ 8ARpjYZP private String sSiteURL; //Site's URL Q~`n%uYg\{ private String sFilePath; //Saved File's Path 9d
v+u6) private String sFileName; //Saved File's Name "&An9H' private int nSplitter; //Count of Splited Downloading File
*v6'I-# z}Q54,9m H}d&>!\}F public SiteInfoBean() nI-\HAX {//nSplitter的缺省值为5 Gk<h_1WWK //default value of nSplitter is 5 >zhbOkR9c this("","","",5); tH$Z_(5
} 6HyQm?c>a <)&;9C 3K{'~?mM public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) Bb
m 1&d# { >n#Pq{7aF sSiteURL= sURL; .Sm7na
K sFilePath = sPath; 1 #_R`(C{ sFileName = sName; /.vB /{2 this.nSplitter = nSpiltter; N[Fz6,ZG _ 3ILEc:<0J cu|{cy- } jGId)f!) 6B&':N98 GSsot%B u" public String getSSiteURL() ~"8b\oLW { ~%'M[3Rb return sSiteURL; + ~HL"Vv } dQt]r 8uNq353 !pgkUzMW public void setSSiteURL(String value) |iU#!+zY { `Q,03W#GJ% sSiteURL = value; a
*>$6H; } Xfe,ZC) hH>t wTG6>l ]H public String getSFilePath() x5s Yo\ { P)4SrqW_ return sFilePath; >%t"VpvR } R'He(x GC.
2!}5shB public void setSFilePath(String value) sdrALl;w| { &W*9'vSm. sFilePath = value; 7aS`SF } yqZKn=1: RCKb5p9 TX$j-TM' public String getSFileName() #Fq6-]y1") { {eL XVNR7R return sFileName; Y}QtgZEt } YjAwt;%-D re:=fC:t5A y]+q mNw"+ public void setSFileName(String value) xwq {0jY { /g@!#Dt sFileName = value; i.Yz)Bw } _3.=| @L \G:\36l |4UW.dGHPo public int getNSplitter() mGb,oj7l { @uApm~} return nSplitter; 63 F@Ft } Eu2@%2}P ;.+sz(:hm I'm.+(1m, public void setNSplitter(int nCount) WZ>
} { Dm2&}{&K nSplitter = nCount; 1$H*E~ } Z$"E|nRN } qX>mOW^gT8 ')zdI]@M d?)k<!fJk /* _XvSe]`f` **Utility.java 5=(fuY3 */ Y
{a#2(xn package NetFox; u[k0z!p_ c DAa??/,x7 *Yj!f6 8 public class Utility { 9l<f?OzAO ~qekM>z P
:zZ public Utility() { j#6@cO'` 2[zFKK 5FKb7 } Z#+lwZD ^VabXGzo# //线程睡眠 h)7hk*I public static void sleep(int nSecond) =MMU(0 E { /{il;/Vj try{ O7vJ`K(! Thread.sleep(nSecond); h'%iY6!fA } _[M*o0[@W catch(Exception e) Qu]F<H*Y| { ;&=c@>!xP# e.printStackTrace (); vuN!7*d+ } B*B}eXUph } 4E:kDl* @ NpqK+GO //日志 $^~dqmE2, public static void log(String sMsg) _!_%Afz { apmZ&Ab System.err.println(sMsg); +9yV'd>U } v@n0ma= {5`=){ DNwqi" public static void log(int sMsg) ?Pbh&! { o>~xrV`E System.err.println(sMsg); PLoD^3uG) } ]fiAV|'^ } U}hQVpP# )a99@`L\P T3H\KRe6 /* {_[\k^98> **TestMethod.java t:$^iUrx */ Ct@O S227x package NetFox; % XvJJ 7UnB]- :. 9IfeaoZZ4q public class TestMethod { so=Ux2 KcPI,.4{ ny++U;qi public TestMethod() T'8d|$X { ///xx/weblogic60b2_win.exe 85gdmla@9 try{ ';,Rq9-' SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); ,;%F\<b //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); uz
U2)n3y SiteFileFetch fileFetch = new SiteFileFetch(bean); jc0Trs{Jf fileFetch.start(); cI#! Y } %0&c0vT catch(Exception e){e.printStackTrace ();} KdN+$fe*g v2K6y|6, k
z{_H`5. } 0Tp,b (;n 3+~m 9:9 L>@:Xo@ public static void main(String[] args) Fx!NRY_ { g._`"c new TestMethod(); &[#iM0;)W0 } lD+f{GR } &GKtD) 点击下载更多相关资料
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