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/* 5a|{ytP **SiteFileFetch.java i,2eoM)FB */ #xw3a<z ?u package NetFox; K=>j+a5$ import java.io.*; kGu{[Rh import java.net.*; C8%MKNPd ,V[|c$ 5DJ!:QY! public class SiteFileFetch extends Thread { hcoZ5!LvT ?Kg_bvoR SN]Na<P SiteInfoBean siteInfoBean = null; //文件信息Bean LtGjHB\+ long[] nStartPos; //开始位置 O-!Q~;3][ long[] nEndPos; //结束位置 W9;9\k FileSplitterFetch[] fileSplitterFetch; //子线程对象 X/h|;C*9 long nFileLength; //文件长度 MS\?+8|SV( boolean bFirst = true; //是否第一次取文件 kAs=5_?I boolean bStop = false; //停止标志 "gt1pf~y File tmpFile; //文件下载的临时信息 _6 @GT DataOutputStream output; //输出到文件的输出流 0nZQ"{x [U:P&) //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) <Qt9MO`a public SiteFileFetch(SiteInfoBean bean) throws IOException \46*4?pP { cNMDI siteInfoBean = bean; HMhdK //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ,z#S=I tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 0,B"p if(tmpFile.exists ()) ]"'1-h91 { Bm 4$ bFirst = false; 3|%058bF read_nPos(); <j1r6.E) } "JE->iD else %~[@5<p { pJIJ"o'>.9 nStartPos = new long[bean.getNSplitter()]; o%*C7bU nEndPos = new long[bean.getNSplitter()]; 7CwWf } S
R s >J#/IjCW P 1 ^91Ae!)d } na@Go@q hFnUw26P )Myx(w"S public void run() yd[4l%G(zS { IY|`$sHb //获得文件长度 `VF_rC[? //分割文件 yb,$UT"] //实例FileSplitterFetch i(kx'ua? //启动FileSplitterFetch线程 <sSH^J4QqX //等待子线程返回
Tj}%G try{ Ii<k<Bt, if(bFirst) ~V0 GRPnI { \jb62Jp nFileLength = getFileSize(); YF>15{H if(nFileLength == -1) #kE8EhQZ { Gd$!xN%O System.err.println("File Length is not known!"); u>=\.d< } F$i 6 else if(nFileLength == -2) ihekON": { +U4';[LG1C System.err.println("File is not access!"); \-sW>LIA } v`S ;.iD else O$N;a9g { IC1nR
u2I for(int i=0;i<nStartPos.length;i++) ]x(6^:D5 { *=tA },`\7 nStartPos = (long)(i*(nFileLength/nStartPos.length)); y6Ez.$M } lMcO2006L for(int i=0;i<nEndPos.length-1;i++) @bChJl4 { v +o6ZNX nEndPos = nStartPos[i+1]; '}:(y$9.` } ].sD#~L_ nEndPos[nEndPos.length-1] = nFileLength; C-g,uARX(r } Z<QNzJ D } pH(X;OC9S sp+'c;a ,3!TyQ\m' //启动子线程 3!%-O:! fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; E)wf'x for(int i=0;i<nStartPos.length;i++) PXML1.r$Q { e,d}4 jy fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @|s$:;(= siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), HU$]o N nStartPos,nEndPos,i); F'CJN$6Mw/ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); uG/'9C6Z fileSplitterFetch.start(); &[SFl{fx>- } brG!TJ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), KT+{-"4- siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 0/1=2E^, // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", %gj7KF nEndPos = " + nFileLength); [WV&Y,E // fileSplitterFetch[nPos.length-1].start(); f>e0l'\ hQ@#h`lS {&L^|X //等待子线程结束 Fnay{F8z //int count = 0; )l/
.<`| //是否结束while循环 5>UQ 3hWo boolean breakWhile = false; ia-ht>F*; k~I]Y, Jfo'iNOu while(!bStop) %dzO*/8cWo { ]{|lGtK % write_nPos(); Q [C26U Utility.sleep(500); # ,97 ] breakWhile = true; |'I>Ojm KW3<5+w]c <L<^uFB for(int i=0;i<nStartPos.length;i++) u /DE { q*tGlM@R? if(!fileSplitterFetch.bDownOver) bZ:xH48MY { F1BXu@~e( breakWhile = false; Ni|MTE]~ break; !%$,S=_F } Xfbr;Jt"< } B/o8r4[80 if(breakWhile) C+"c^9[ break; HF"TS* IP@3R(DS% U$3DIJVI //count++; 8@LUL)" //if(count>4) 8nL9#b // siteStop(); SlHDBr!.z } t0r0{: +@yU ` oI'& &Bt System.err.println("文件下载结束!"); Ab>Kf r# } ]mz '(t catch(Exception e){e.printStackTrace ();} (h@!_qi9: } /y|ZAN 7U?#Xi5 *j,bI Y&se //获得文件长度 :U=3*f.{ public long getFileSize() )WW*X6[k { R
eb.x_ int nFileLength = -1; Q1ayd$W@< try{ <mj/P|P@ URL url = new URL(siteInfoBean.getSSiteURL()); l9OpaOVfJ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); Dsn=fht httpConnection.setRequestProperty("User-Agent","NetFox"); m*CW3y{n) ^fH)E"qq5 /8nUecr int responseCode=httpConnection.getResponseCode(); z>iXNwz"? if(responseCode>=400) 1P'A*`!K { 'Bxj(LaV- processErrorCode(responseCode); 0
f$96sl return -2; //-2 represent access is error G
9(*F } JtsXMZz R4P&r=? >)G[ww[ String sHeader; YllZ5<} MkjB4:" "'@D\e} for(int i=1;;i++) 7Z~JuTIZ { *9xxX,QT8Q //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); RgJbM\`}? //Utility.log(in.readLine()); q5JQx**g sHeader=httpConnection.getHeaderFieldKey(i); fA]sPh4Uag if(sHeader!=null) 023uAaI^3r { ~d1=_p:~T if(sHeader.equals("Content-Length")) x X[WX#'f { XjP& nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); /#SfgcDt break; 9_F&G('V{a } ]7>#YKH. } l6 }+,v@# else f~PS'I_r break; 7R
m\# } NZ&ZK@h}. } UKV<Ye| catch(IOException e){e.printStackTrace ();} x?lRObHK catch(Exception e){e.printStackTrace ();} `LLmdm 6i /5z,G r "
DLIx} Utility.log(nFileLength); 5c(g7N "C&>$h_% 54JZOtC3~ return nFileLength; F?"Gln~; } n4M
Xa()P1 _9H]:]1QH d>W#c8X> //保存下载信息(文件指针位置) {.p;V private void write_nPos() ?U[6X|1 { i2rSP$j try{
(n~fe-?}8 output = new DataOutputStream(new FileOutputStream(tmpFile)); Y\WVkd(+G output.writeInt(nStartPos.length); lY(_e# for(int i=0;i<nStartPos.length;i++) >o v#\ { R@s|bs? // output.writeLong(nPos); i+in?!@G: output.writeLong(fileSplitterFetch.nStartPos); !Q_Wbu\U output.writeLong(fileSplitterFetch.nEndPos); G`jvy@ } b_6cK# output.close(); K]Vp! G } )=X g catch(IOException e){e.printStackTrace ();} MffCk!] catch(Exception e){e.printStackTrace ();} QV HI}3~ } ='w 2"4 2Xk;]-T! r|*_KQq //读取保存的下载信息(文件指针位置) B(vCi^ private void read_nPos() Z<^EZX3N { [7~AWZU3 try{ J$5G8<d> DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ?Js4\X!uJ int nCount = input.readInt(); gq 3|vzNZ nStartPos = new long[nCount]; B8"c+<b nEndPos = new long[nCount]; @#hvQ6u for(int i=0;i<nStartPos.length;i++) =M4:nt { iR./9}Ze nStartPos = input.readLong(); =T6 ~89 nEndPos = input.readLong(); ^b`-zFL7 } O9_1a=M input.close(); 8 @(?E[&O> } @_$$'XA7 catch(IOException e){e.printStackTrace ();} IHi[3xf< catch(Exception e){e.printStackTrace ();} @Lf&[_ } >`a^E1) Vp~ cN 6|
o S 5 private void processErrorCode(int nErrorCode) v<g~EjzCf { p=A,yGDV System.err.println("Error Code : " + nErrorCode); w xte } Ab/JCZNn D}X6I#U'/ wd<{%qK`{ //停止文件下载 g[t paQ public void siteStop() R) dP=W* { r)Lm| S
bStop = true; &fWC-| for(int i=0;i<nStartPos.length;i++) i^iu#WC fileSplitterFetch.splitterStop(); 4k3pm& $oM>?h_= 1L'Q;?&2H, } 3RGmmX"?G } `{h)-Y`` //负责部分文件的抓取 dR< d7 **FileSplitterFetch.java ",vK~m2W_ */ EK[J!~ package NetFox; `[#id@Z1 ]1>R8 TIl 'Z7 import java.io.*; 4@Db $PHs import java.net.*; U*\K<fw l4r>#n\yj ];6955I! public class FileSplitterFetch extends Thread { 0asP,)i {D..(f1*u 3(t,x String sURL; //File URL z#PaQp5F long nStartPos; //File Snippet Start Position ru 9@|FgAE long nEndPos; //File Snippet End Position (>ze{T| int nThreadID; //Thread's ID F<6(Hw#> boolean bDownOver = false; //Downing is over }v|_]
boolean bStop = false; //Stop identical F:P2:s<d- FileAccessI fileAccessI = null; //File Access interface rb4; @& `o }+2Cb PMbZv%.,- public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException oOvQAW8` { un~`| this.sURL = sURL; l5VRdZ4Uf this.nStartPos = nStart; & C)1( this.nEndPos = nEnd; ,lvG5B\0 nThreadID = id; :2==7u7v? fileAccessI = new FileAccessI(sName,nStartPos);//定位 ^t7u4w! } ]>Z9K@ ||wi4TP BLaNS4e public void run() DW9MX`!Xc { o_mjI: while(nStartPos < nEndPos && !bStop) <dD!_S6@, { ~@l4T_,k bfoTGi
uHZ4
@w: try{ 6.KEe^[- URL url = new URL(sURL); ]
L#c
<0 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); j[A(@w" httpConnection.setRequestProperty("User-Agent","NetFox"); 'SlZ-SdR String sProperty = "bytes="+nStartPos+"-"; =<Sn&uL httpConnection.setRequestProperty("RANGE",sProperty); 3~3tjhw;]9 Utility.log(sProperty); NNqvjM- k,=<G, ]N'%l]_$ InputStream input = httpConnection.getInputStream(); m3pDFI //logResponseHead(httpConnection); W3>9GY90R V-go?b` F09%f"9 byte[] b = new byte[1024]; "h[)5V{ int nRead; 1`L.$T,1! while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) $"|r7n5[ { 5m0lk|` nStartPos += fileAccessI.write(b,0,nRead); 1~~GF_l? //if(nThreadID == 1) a$Ud" // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ?K:\WW } 0ElEaH1z -`\^_nVC {'M/wT)FeC Utility.log("Thread " + nThreadID + " is over!"); #'>)?]tn bDownOver = true; Bx5xtJ|! //nPos = fileAccessI.write (b,0,nRead); |J:r]);@K } #CI0G catch(Exception e){e.printStackTrace ();} \rxjvV4fcZ } z{w %pUn} } G]k[A=dg LkzA_|8:D e>e${\=, //打印回应的头信息 Bi
\fB-| public void logResponseHead(HttpURLConnection con) v .C { "PRHQW for(int i=1;;i++) 8M,o)oH { =Jw*T[ E String header=con.getHeaderFieldKey(i);
A~nqSe if(header!=null) M_%KhK //responseHeaders.put(header,httpConnection.getHeaderField(header)); hLZfArq} Utility.log(header+" : "+con.getHeaderField(header)); A_U=`M=- else XtZd%
#2}, break; ibQ
xL3 } j[dZ*Jr_ } zo"L9&Hzo gvWgw7z /LWk>[Z; public void splitterStop() ;-py h( {
hO.b?>3NL bStop = true; Fy E#@ R } xsRkO9x `!I/6d?A )=K8mt0qob } YV|_y:- A+dx7anUz N.z2eo /* l"dXL"h **FileAccess.java c\rP
-"C *//文件访问(定位,写) }UGSE2^1 package NetFox; e4Ibj/ import java.io.*; OZf@cOTWK T}Wbt=\M u
e public class FileAccessI implements Serializable{ P#!gP3 NV/paoyx:* //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 iOv>g-t: RandomAccessFile oSavedFile; =e# h;x2 long nPos; n]4Elrxx U.~G{H`G,u s
Y1@~ v public FileAccessI() throws IOException s=jH1^ { ]C"?xy this("",0); 9"S iHp\) } e&i`/m5 %$ o[,13=
J?Y,3cc. public FileAccessI(String sName,long nPos) throws IOException /2=9i84 { w<!,mL5 N oSavedFile = new RandomAccessFile(sName,"rw"); 3p HI+a this.nPos = nPos; q+8de_"] oSavedFile.seek(nPos); c9jS
!uDMK } #0h}{y
E
7n84`|= (c}!gjm public synchronized int write(byte[] b,int nStart,int nLen) "eTALRL'o { (m!kg int n = -1; ~V ?z!3r-) try{ a;;
Es oSavedFile.write(b,nStart,nLen);
H6nH n = nLen; Q
-$)
H;, } D[]0/+, catch(IOException e) Io
IhQ { K>~YO~~ e.printStackTrace (); !+Y+P? } K0v S Z VdQ$ (
6zu*H) return n; JBc*m } B<.\^fuS Zz:%KUl3 & uwOyb } 5"b1:
w@ c}S<<LR }JQy&V% /* {*8G<& **SiteInfoBean.java {=d}04i)E" */ j$6Q]5KdoS package NetFox; &CXk=Wj hop|
xtai; Au)~"N~p? public class SiteInfoBean { *6u2c%^ byt$Wqdl LTA0WgzR) private String sSiteURL; //Site's URL F}[!OYyg private String sFilePath; //Saved File's Path .C+(E@ey A private String sFileName; //Saved File's Name #Q=c.AL{ private int nSplitter; //Count of Splited Downloading File BaP'y8dVN SQ+r'g jvR(e" public SiteInfoBean() 0cfGI% {//nSplitter的缺省值为5 `?l
/HUw //default value of nSplitter is 5 rk;]7Wu this("","","",5); T]/> c } EAWBgOO8iC yeIS} O eAP
8! public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) qvWi; { e9Gu`$K sSiteURL= sURL; ndN*X' sFilePath = sPath; x2HISxg sFileName = sName; %Q}(.h%M this.nSplitter = nSpiltter; 2g_mQT (5+g:mSfr 726UO#* } R@ Gll60 >PQ?|Uk v}AjW%rB
public String getSSiteURL() '+iLW~ { ]b1>bv% return sSiteURL; 69:-c@L0 } !z2xm3s{]p -j rAk j5/|1N public void setSSiteURL(String value) {<}Hut:a {
H4YA sSiteURL = value; O<@L~S] } GA[bo)" Ijz*wq\s; g6.I~oQj public String getSFilePath() Z1$U[Tsd { 8D? $@!- return sFilePath; ~FXq%-J } 7\nXJ381 S&[9Vb EASmB
public void setSFilePath(String value) ; 5[W*,7s { z`Nss
o= sFilePath = value; $txF|Fj]^A } uz$p'Q ^k^?>h ~h=iZ/g_^_ public String getSFileName() %WmTG }L) { <*u^8lCA return sFileName; @;hdZLG]`& } `*kl> }$ AkO);4A;Jd HKO]_; :( public void setSFileName(String value) y
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I9"R { X+,0;% p sFileName = value; =_@) KWeX$ } ug;\`.nT^ ){eQ.yW jr#*;go public int getNSplitter() E&@#*~ { <_=O0 t|6 return nSplitter; c1y+kvv } x7i<dg& QSM3qke R(P(G;#j public void setNSplitter(int nCount) 0sme0"Sl { #QSSpsF@ nSplitter = nCount; Sx0{]1J } @k'V`ZQF } ^f"|<r TVSCjI Ux= B*m1@{ /* 0mmHN`< **Utility.java gnxD'1_ */ r[GH#vF;7 package NetFox; XsFzSm WT1y7+_g(d yxf#@Je" public class Utility { $bZ-b1{c C vo&h6'i>7 cg9}T[A public Utility() z>
DQ { iAXGf V lHTr7uF( oZl%0Uy?9I } 15aPoxo> 7kT X //线程睡眠 tuuwoiQ*` public static void sleep(int nSecond) Gui[/iY,F { uf (_<~ try{ hJk:&!M=T Thread.sleep(nSecond); %4YSuZg } Vw`Q:qo0:b catch(Exception e) Pv\8 \,B9 { \l
8_aj e.printStackTrace (); `Gl[e4U } ?gvu
E1 } E_Y!in
70 eU e, P //日志 lq,]E/<& public static void log(String sMsg) kDM?`(r { U&a(WQV9& System.err.println(sMsg); 87!m l } l7 @cov 8]1,E E< IJDbm}:/e public static void log(int sMsg) +KNd%AJ { EdSUBoWF} System.err.println(sMsg); zM<L_l& } +qT+iHa|n } 8$ #z> m!P<#
|V @'?gan#( /* a69e^;,>q **TestMethod.java $MfRw */ ?<8c package NetFox; \ n^[!e"` /<(-lbq, KHJ wCv public class TestMethod { C=cn.CX ]?oJxW. [fo#){3K public TestMethod() A^LS^!Jz { ///xx/weblogic60b2_win.exe 5IFzbL#q#f try{ AP1ZIc6 SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); Z'}%Mkm`i} //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); }4h0{H SiteFileFetch fileFetch = new SiteFileFetch(bean); :2C
<;o fileFetch.start(); >Q[ Z{ } +*Uv+oC| catch(Exception e){e.printStackTrace ();} KU+\fwYpnk 7-~)/7L ~%f$}{ } k#8`996P bw7g L\* u7Ix7`V public static void main(String[] args) LEOa=(mN\ { )EKWsGNe/ new TestMethod(); .jtv Hr}U } ]+B.=mO_ } &?Q^i">cZ 点击下载更多相关资料
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