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/* nr2 Q[9~ **SiteFileFetch.java T/a=z */ o^XDG^35` package NetFox; SQ_Je+X import java.io.*; KL9k9|!p import java.net.*; fIl;qGz85 ? D
_kQl wA\5-C7j public class SiteFileFetch extends Thread { z/u^ {`QA.he. W1 k]P. SiteInfoBean siteInfoBean = null; //文件信息Bean 6<EGH*GQ$ long[] nStartPos; //开始位置 q`,%L1c4 long[] nEndPos; //结束位置 [Ur\^wS FileSplitterFetch[] fileSplitterFetch; //子线程对象 nl
qn:[BU long nFileLength; //文件长度 x-"8V( boolean bFirst = true; //是否第一次取文件 g5
T boolean bStop = false; //停止标志 0z'GN#mT5 File tmpFile; //文件下载的临时信息 S=(<m%f DataOutputStream output; //输出到文件的输出流 Y=p!xr> m8ts!6C //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) DmpT<SI+! public SiteFileFetch(SiteInfoBean bean) throws IOException H1I^Vij { -8xf}v~u siteInfoBean = bean; Wl |5EY //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); y{S8?$dU$: tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); d2V X\ if(tmpFile.exists ()) p}^5ru { RFMPh<Ac bFirst = false; =e4 r=I read_nPos(); |~r-VV(= } T5
(|{- else tLBtE!J$[ { =A.$~9P nStartPos = new long[bean.getNSplitter()]; z%OKv[/N nEndPos = new long[bean.getNSplitter()]; @^xtxtjzux } 4);_f %8,$ILN g:>'+(H ; T9C_=0(hn } `PC9t)%.pV CmZayV L.Qz29\ public void run() +{1.kb
Zq { I |U'@E //获得文件长度 .E<nQWz8 //分割文件 gxN>q4z //实例FileSplitterFetch L-T,[;bl //启动FileSplitterFetch线程 DcW?L^Mst //等待子线程返回 <.Ws; HN} try{ >>
zd if(bFirst) Y3Fj3NwS { }5-w,m{8/ nFileLength = getFileSize(); >#w;67he2 if(nFileLength == -1) ZEAUoC1E1 { SVZocTt System.err.println("File Length is not known!"); v1TFzcHl< } Ho>Np& else if(nFileLength == -2) xWxc1tT` { 9 3>4n\ System.err.println("File is not access!"); Qc; kj } D5TDg\E else gcU*rml { r3W3;L for(int i=0;i<nStartPos.length;i++) 4f([EV[6dK { $"r9U|6kk nStartPos = (long)(i*(nFileLength/nStartPos.length)); c-sjYJXKM* } Q?#I{l)V( for(int i=0;i<nEndPos.length-1;i++) 2;8m0+tl { `gX@b^ nEndPos = nStartPos[i+1]; 1^!SuAA@ } >Icr4?zq nEndPos[nEndPos.length-1] = nFileLength; ;V
xRaj? } BmG(+;;& } QO2cTk
m vrkY7L3\ /ad9Q~nJ //启动子线程 U ? +_\ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; x4oWZEd for(int i=0;i<nStartPos.length;i++) 4J2^zx,H { cCe~OlXQ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {KG 6#/%; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),
<kak9
6A nStartPos,nEndPos,i); c.ow4~> Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); i[o 2(d, fileSplitterFetch.start(); s6!6Oqh } !+eH8
// fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), vADiW~^Q^ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); Oynb"T&8 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", `*C=R
_ nEndPos = " + nFileLength); ^[M{s(b // fileSplitterFetch[nPos.length-1].start(); gc9R;B1 *doNPp)m bMyld&ga //等待子线程结束 e$# *t //int count = 0; FSIiw#xzH //是否结束while循环 5(3O/C{?~ boolean breakWhile = false; +0'F@l fw%`[(hK CSO'``16 while(!bStop) E
TT46%Y { (W
~K1] write_nPos(); UB/> Ro Utility.sleep(500); ZJYn[\] breakWhile = true; Qp>leEs]+6 Wg']a/m J ^'El^F for(int i=0;i<nStartPos.length;i++) Zxa.x?:?n { Zh"m;l/] if(!fileSplitterFetch.bDownOver) [#PE'i4 {
@Z jT_ breakWhile = false; b/wpk~qi break; |9CikLX)7 } I//=C6 } 6':iW~iI if(breakWhile) WYP ;s7_ break; B5b:znW2@ %6UF%dbYH` h>-P / //count++; h051Ol\v* //if(count>4) I;(3)^QH# // siteStop(); |#oS7oV( } /*K2i5&X !+l'<*8V =Zd(<&B K System.err.println("文件下载结束!");
is'V%q } _BczR:D* catch(Exception e){e.printStackTrace ();} al2t\Iq90 } MdHm%Vx 8-q^.<9 Harg<l //获得文件长度 }E'0vf/ public long getFileSize() t]/eCsR { Nk|cU;?+ int nFileLength = -1; j(;^XO Y# try{ O$Rz/& URL url = new URL(siteInfoBean.getSSiteURL()); p"g|]@m HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ,eXtY}E httpConnection.setRequestProperty("User-Agent","NetFox"); h>N}M}8 7=!9kk 0 wPA^nZ^}9c int responseCode=httpConnection.getResponseCode(); $l7^-SK`E if(responseCode>=400) 64s;EC { $[gN#QW% processErrorCode(responseCode); 8bIP"!=*W return -2; //-2 represent access is error ]lB zp D } 5xQ-f >=~\b $ghZ<Y2}9 String sHeader; }3pM,. @<.@X*#I NYm"I`5w for(int i=1;;i++) vQAFg G { 5KCB^`|b>t //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); nxLuzf4U5 //Utility.log(in.readLine()); !X>u.}?g sHeader=httpConnection.getHeaderFieldKey(i); e+
xQ\LH if(sHeader!=null) Sj9fq* { YOCEEh? if(sHeader.equals("Content-Length")) $.G 7Vt { 9U8M|W|d nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); S,Y|;p<+^ break; c}(WniR-" } %)ho<z:7U } K,b
M9>} else 0-.
d{P break; r*X,]\V0x } `Q]N]mK } &Y@i:O catch(IOException e){e.printStackTrace ();} |3H+b,M5 catch(Exception e){e.printStackTrace ();} )2}R1K> \2SbW7"/;P N8<J'7% Utility.log(nFileLength); )^2eC<t qd`e:s*% >oh H4: return nFileLength; &w@]\7L,: } DaQ"Df_X n 8cA8< v2T2/y% //保存下载信息(文件指针位置) 0I}e>]:I private void write_nPos() 'B@`gA { 0[;2dc try{ X>q`F;W output = new DataOutputStream(new FileOutputStream(tmpFile)); lu8G$EQI output.writeInt(nStartPos.length); ]hl*6 for(int i=0;i<nStartPos.length;i++) 12$0-@U { 7[m?\/K~ // output.writeLong(nPos); . "Ms7= output.writeLong(fileSplitterFetch.nStartPos); 1{}p_"s> output.writeLong(fileSplitterFetch.nEndPos); JA^o/%a^ } ^X#y'odtbS output.close(); RObnu* } +v~xgUs catch(IOException e){e.printStackTrace ();} i"{O~[ catch(Exception e){e.printStackTrace ();} T$Z9F^w } TpjiKM y^.66BH *}[\%u$ T //读取保存的下载信息(文件指针位置) ;>6< u.N private void read_nPos() RLF&-[mr3 { GES}o9?# try{ qJey&_ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); }@DCc f$< int nCount = input.readInt(); )SV.| nStartPos = new long[nCount]; MKK ^-T nEndPos = new long[nCount]; g \mE for(int i=0;i<nStartPos.length;i++) N0`9/lr| { !_W:%t)g nStartPos = input.readLong(); blO4)7m nEndPos = input.readLong(); 2q
f|+[X } #-{<d%qk input.close(); U,P_bz*) } k.J%rRneN catch(IOException e){e.printStackTrace ();} ofvR0yV catch(Exception e){e.printStackTrace ();} UwN Vvo } `L1,JE`
q C]^Ep i'~-\F! private void processErrorCode(int nErrorCode) k"wQ9=HP7 { :]3X Ez System.err.println("Error Code : " + nErrorCode); Vl^(K_`( } !_I1=yi sp K8^sh I-#H+\S //停止文件下载 F(")ga$r public void siteStop() &@=Jm
/5 { }=R]<`Sj.j bStop = true; QM$UxWo- for(int i=0;i<nStartPos.length;i++) ZOK!SBn^? fileSplitterFetch.splitterStop(); 5_yQI D%Sq 6[bopin D9rQ%|}S } *TOd Iq&z } .i0K-B //负责部分文件的抓取 8%rD/b6` **FileSplitterFetch.java &L|oqXE0L */ q'3{M]Tk package NetFox; mz?<t/$U So%X(,
| jNZ.Fb import java.io.*; )u?f| D import java.net.*; 4pmeu:26 =lacfPS U,GSWMI/K public class FileSplitterFetch extends Thread { zzmC[,u} _,3ljf?WQM bG;fwgAr String sURL; //File URL Vax g long nStartPos; //File Snippet Start Position !-I,Dh-A long nEndPos; //File Snippet End Position 4.A^5J'W int nThreadID; //Thread's ID q^X7x_ boolean bDownOver = false; //Downing is over w,|@e_|J boolean bStop = false; //Stop identical unDW2#GX FileAccessI fileAccessI = null; //File Access interface 3:nhZN/95T 0KA*6]h t mF~T?L" public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException %h.zkocM { U~G7~L &m this.sURL = sURL; *,u3Wm|7 this.nStartPos = nStart; 2=cx`"a$ this.nEndPos = nEnd; +LHU}'| nThreadID = id; *CN *G" fileAccessI = new FileAccessI(sName,nStartPos);//定位 LKN7Lkl } @2(u=E: ^ )"x6V""Rb "M%R{pGA7 public void run() 8 t+eu O { ]4~Yi1] while(nStartPos < nEndPos && !bStop) +IZ=E
>a { VZ]iep UB~K/r`.| e02Hf{eOfw try{ .ARYCTyG URL url = new URL(sURL); F`=p/IAJK HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 0d2P httpConnection.setRequestProperty("User-Agent","NetFox"); S!K<kn`E3 String sProperty = "bytes="+nStartPos+"-"; U1\EwBK8*T httpConnection.setRequestProperty("RANGE",sProperty); 3Tr,waV Utility.log(sProperty); dJuy Jl$* fe .=Z& c!w[)>v InputStream input = httpConnection.getInputStream(); }G4I9Py //logResponseHead(httpConnection); "&L8d(ZuA ,%!m%+K9a VH7t^fb byte[] b = new byte[1024]; N2:Hdu: int nRead; XJul~"
while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) T!/o^0w { xd?=#d nStartPos += fileAccessI.write(b,0,nRead); NKY|Z\ //if(nThreadID == 1) i0M6;W1T // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); B>{%$@4 } (l5p_x ^^q&VL %:26v Utility.log("Thread " + nThreadID + " is over!"); d+n2
c`i bDownOver = true; {lK2yi //nPos = fileAccessI.write (b,0,nRead); <ZT
C^=3 } eP~bl
catch(Exception e){e.printStackTrace ();} wd:Yy }
9qX$ } Y S3~sA 2EgvS!" @@R Mm$ //打印回应的头信息 ]*dYX=6 public void logResponseHead(HttpURLConnection con) s|IBX0^@ { OvH:3"Sdy for(int i=1;;i++) sRB=<E*_ { |v+z*}fKw String header=con.getHeaderFieldKey(i); 9J:|"@)N if(header!=null) l|q-kRRjn //responseHeaders.put(header,httpConnection.getHeaderField(header)); 9nY`rF8@ Utility.log(header+" : "+con.getHeaderField(header)); \?
/' else Whd > break; @9^OHRZX } w4fKh } j"Jf|Hq $ |E~c#lV bQD8#Ml1 public void splitterStop() =r]l"T { Xg~9<BGsi bStop = true; ?HG[N7=j } Wvl~|Sx] Q{~g<G y&(#C:N } y;o - @] <F^9ML+'
$9%F1:u /* Y:CX RU6eD **FileAccess.java i]n2\v AG *//文件访问(定位,写) /? %V%
n package NetFox; I`{3I-E import java.io.*; xLed];2G %P}H3;2 =
#-zK:4 public class FileAccessI implements Serializable{ ;*?>w|t}w SM~ ~: //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 gk%01&_>4 RandomAccessFile oSavedFile; ,h=a+ja8 long nPos; ,^bgk
-x- :2lpl%/ <M9NyD` public FileAccessI() throws IOException ?22U0UF { s AFn.W this("",0); &~2m@X(o } 3JC uM_y 1 b7jNkQ b |:Y3_> public FileAccessI(String sName,long nPos) throws IOException "{8j!+]4i { JuZkE9C,${ oSavedFile = new RandomAccessFile(sName,"rw"); 7V%P this.nPos = nPos; -sJ1q^;f@ oSavedFile.seek(nPos); 1v&!%9 } 9(t(sP_ ;6 @sC[ HGAi2+& public synchronized int write(byte[] b,int nStart,int nLen) s(py7{ ^K { gaN/
kp int n = -1; uD/@d'd_4L try{ z5gVP8*z5 oSavedFile.write(b,nStart,nLen); UvGxA[~2+ n = nLen; 9mxg$P4 } ]Y?Y$> catch(IOException e) Z*M{ { Jqb~RP~ e.printStackTrace (); , >aa2 } D?#l8 A6[FH\f 3IRur,|' return n; OxDqLX } e6MBy\*n =?$~=1SL+ N!ihj:, } LEM%B??&5z a4UwhbH ='jT
5Mg /* j^=Eu r/ **SiteInfoBean.java NWh1u` */ frUs'j/bZ package NetFox;
c\n_[r LxIGPC~ 3w)r"" C& public class SiteInfoBean { _<RTes PR5N:Bw
| Uics:cQC private String sSiteURL; //Site's URL {C&Uq#V private String sFilePath; //Saved File's Path 1UK= t private String sFileName; //Saved File's Name "dP-e private int nSplitter; //Count of Splited Downloading File ,c:NdY(,) EMP|I^ )Xqjl public SiteInfoBean()
g*a+$' {//nSplitter的缺省值为5 6yy%_+k* //default value of nSplitter is 5 .v(GVkE} this("","","",5); wH8J?j"5> } ,=\.L_' MrzD
ah9UG T^Ia^B-%}g public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) )Zr\W3yWX { .8W-,R4 sSiteURL= sURL; m"rht:v5 sFilePath = sPath; N
;=zo-8 sFileName = sName; Y_Fn)( this.nSplitter = nSpiltter; 6 eryf? PwW$=M{\. "LTw;& y } A:ts_* =s!0EwDH3 Mv%Qze,\V^ public String getSSiteURL() zc8^#D2y& { vYm-$KQ"o return sSiteURL;
~qQZh u" } L9O;K$[s @Dfg6<0 )YgntI@ public void setSSiteURL(String value) F oC
$X { |;NfH|43; sSiteURL = value; WYb}SI(E } }Q4Vy ?|kbIZP( @*|VWHR public String getSFilePath() g;=VuQuP| { xI{fd1 return sFilePath; t3<8n;'y: } 27N;> )qb'tZz/g_ OW#0$%f public void setSFilePath(String value) 6&0@k^7~ { %d];h sFilePath = value; <[\I`kzq } +# 'w}
P d)1gpRp AE>W$x8P public String getSFileName() VIdKe&, { msgR"T3' return sFileName; o3hgkoF } ;Tr,BfV|Bf F}{%*EJ QP.Lq}
public void setSFileName(String value) -9FGFBm4] { ld]*J}cw sFileName = value; 1s(T#jh } g
ptf*^s xjr4')h :+DrV\) public int getNSplitter() SI~jM:S} { jbipNgxkr return nSplitter; vN^.MR+< } V3ht:>c9qs ~D3S01ecM s>o#Ob@4' public void setNSplitter(int nCount) *gH]R*Q[Rt { b]b>i]n nSplitter = nCount; BL 1KM2] } '>t&fzD0 } iH4LZ uCr& ` BJwuN /* _M/N_Fm **Utility.java #?w07/~L */ .2c/V package NetFox; I+H~ 5zq. %4m Nk}tyH g8uqW1E^ public class Utility { dvjj"F'Bf UgAp9$=z '27$x&6>S public Utility() xx!8cvD4? { OU UV8K "jyo'r D<69xT, } 6}-No W"Y)a|rG% //线程睡眠 Ur#jJR@%3 public static void sleep(int nSecond) +Mq\3 { QO}~"lMj try{ SM8N*WdiU Thread.sleep(nSecond); ':pDlUA } ns>$ catch(Exception e) E#+2)Q { RJ@79L*# e.printStackTrace (); Xd%qebK } :W0p36" } *|Vf1R] :ZY%-]u7 //日志 3eE=>E4, public static void log(String sMsg) DWOf\[
{ 3S3(Gl System.err.println(sMsg); +"-l~`+<es } u!|_bI3 ,Suk_aX> Axsezr/ public static void log(int sMsg) jKmjZz8L]% { D/Ki^E System.err.println(sMsg); /al56n } FTCIfW } <VhmtT%7 THhxj) _y[C52, /* fE~KWLm **TestMethod.java se %#U40* */ e-y$&[
package NetFox; `.J)Z=o B1_9l3RM gZtQtFi public class TestMethod { Ob]\t/:%P b5)^g+8)w "b`#RohCi public TestMethod() dh`s^D6Q> { ///xx/weblogic60b2_win.exe [T_[QU:A try{ e#Ao]gc SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 6d]4
%Q T //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); a%Q`R;W SiteFileFetch fileFetch = new SiteFileFetch(bean); c
qCNk fileFetch.start(); ):PN0.H8 } xF!IT"5D catch(Exception e){e.printStackTrace ();} 6"G(Iq'2t3 "L]v:lg3 ]Ik~TW& } }&=l)\e OU%"dmSDk P_3IFHe public static void main(String[] args) VYb,Hmm>kC { Ld*Ds!*'/ new TestMethod(); #a=]h}&1? } 4j3_OUwWZx } ivgX o'= 点击下载更多相关资料
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