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/* TLL.Ch|#Y **SiteFileFetch.java a91Q*X% */ '7F`qL\/#( package NetFox; +M\*C# import java.io.*; k*4?fr import java.net.*; tc{23Rf% Hc@Z7eQ3^ P-~Avb public class SiteFileFetch extends Thread { |yI?}zyR 9tS&$-
ubhem(p# SiteInfoBean siteInfoBean = null; //文件信息Bean
YV 9*B long[] nStartPos; //开始位置 ^3`98y.Q long[] nEndPos; //结束位置 ZUyM:$ FileSplitterFetch[] fileSplitterFetch; //子线程对象 Q9[dUdQm long nFileLength; //文件长度 %a/O7s 6 boolean bFirst = true; //是否第一次取文件 1F5F2OT$8 boolean bStop = false; //停止标志 \Mlj
7.u] File tmpFile; //文件下载的临时信息 t:M({|m Y DataOutputStream output; //输出到文件的输出流 LFSOHJj f|VP_o< //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) d1j v>tu public SiteFileFetch(SiteInfoBean bean) throws IOException PyHE>C% { wH#k~`M siteInfoBean = bean; qRB7I:m-Wi //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); $)@zlnU tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); VH*j3 if(tmpFile.exists ()) Ro:-u7q { kXX RMR bFirst = false; 4r(rWlM read_nPos(); ]Wa,a
T' } wq]nz! else 9Zrn(D { Mdwh-Cis/ nStartPos = new long[bean.getNSplitter()]; udc9$uO nEndPos = new long[bean.getNSplitter()]; GW
$iK@ } &U
'Ds! N7#GK]n%/} db%`-UST 6ldDt?iSg } `ZefSmb b'-gy0 _F3vC# public void run() G#%
=R`k/ { jEO; //获得文件长度 ZRxB" a' //分割文件 \O/=g6w|t} //实例FileSplitterFetch mU&J,C //启动FileSplitterFetch线程 5d4-95['_ //等待子线程返回 n6uobo- try{ $9J"r9@@ if(bFirst) (~#PzE: { rz.`$b nFileLength = getFileSize(); \R#XSW, if(nFileLength == -1) E{Q^ZSV3B { MoFZ System.err.println("File Length is not known!"); lp]O8^][& } ja>T nfu else if(nFileLength == -2) a,tP.Xsl { "iydXV=Q System.err.println("File is not access!"); uuC/F_='B } 3?}SXmA'@ else H5aUZ= { W4| ;JmT.r for(int i=0;i<nStartPos.length;i++) @LmUCP~ { ?D~uR2+Z nStartPos = (long)(i*(nFileLength/nStartPos.length)); #e0+;kBh } 4v?S`w:6 for(int i=0;i<nEndPos.length-1;i++) O0I/^ { `150$*K&B nEndPos = nStartPos[i+1]; }z*p2)v` } \4&g5vE nEndPos[nEndPos.length-1] = nFileLength; 7)]G"m{ }
6$Dbeb } }$UFc1He\J l{3utQH-=z BxG;vS3>*e //启动子线程 /[-hJ=<Yb fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; >ylVES/V for(int i=0;i<nStartPos.length;i++) @GV^B'}* { YJ0[BcZ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ["7}u^z@<+ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), n#R!`*[ nStartPos,nEndPos,i); {F4: Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); =os j}( fileSplitterFetch.start(); 7D^A:f } *Zvw&y* // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), iOyYf!yg siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); yqU++;6 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ?b0\[ nEndPos = " + nFileLength); ;Cy@TzO/| // fileSplitterFetch[nPos.length-1].start(); wVVe L$28 L9.#/%I\ Zry>s0 //等待子线程结束 o?3R HP47 //int count = 0; (!b:
gG //是否结束while循环 s6$3[9Vh&9 boolean breakWhile = false; gM*s/,;O" p%s
D>1k i~;8'>:|,M while(!bStop) S;NXOsSu { |);>wV" write_nPos(); >&VL2xLy Utility.sleep(500); 1gE`_%?K breakWhile = true; VtO+=mZV 1 W0; YcT] ,uv$oP- for(int i=0;i<nStartPos.length;i++) aPC!M4# { =%3nKSg if(!fileSplitterFetch.bDownOver) b>i=",i\ { #^9;<@M breakWhile = false; 8syo_sC | break; coWB KWF } Y[!a82MTzn } ^6+x0[13 if(breakWhile)
zCHr break; B /W$RcV ;i9CQ0e? #-;BU{3* //count++; 1 XG-O //if(count>4) `9ox?|iJ // siteStop(); L,6Y=? } OLrD4 e FT~^$)8= L3AwL)I System.err.println("文件下载结束!"); k3 l } />C~a]} catch(Exception e){e.printStackTrace ();} 9QMn%8=j } X2cR+Ha0 qN@a<row&~ j;)6uia*A //获得文件长度 yr>bL"!CA public long getFileSize() Aq!['G { $1+K}tP int nFileLength = -1; *K|aK p} try{ ?^~"x.<nr URL url = new URL(siteInfoBean.getSSiteURL()); >K
:"[? HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %K"%Qm=Tl httpConnection.setRequestProperty("User-Agent","NetFox"); CeTr%j G+uiZ(p> ImY.HB^& int responseCode=httpConnection.getResponseCode(); h
'[vB^ if(responseCode>=400) P0xLx { (L$~zw5gr processErrorCode(responseCode); Nz*sD^SJa return -2; //-2 represent access is error au|^V^m } (:QQ7xc{} zXZ'nJ5OGG VA'X!(Cv String sHeader; (0W}e(D8
ht)nx,e= %i8>w:@NW for(int i=1;;i++) /w M { 6
]Oxx{|} //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); |xZcT4 //Utility.log(in.readLine()); iIaT1i4t. sHeader=httpConnection.getHeaderFieldKey(i); hw$c@:pW; if(sHeader!=null) *ldMr{s<R { vQ"s if(sHeader.equals("Content-Length")) 5xDN&su { HhmVV"g nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); cmhN(== break; 3]<re{)J9O } 45sxF?GSwL } [Cj}nld else *3O >J" break; S tnv> } 6@q[tN7_^ } &3Z.
#* catch(IOException e){e.printStackTrace ();} +'/}[1q1/T catch(Exception e){e.printStackTrace ();} x
XM!E
8 PCPf*G> ]A72)1 Utility.log(nFileLength); oL Vtu5 @f{_=~+ Y#&0x_Z return nFileLength; c5E#QV0&v~ } 5!F\h'E iv:/g|MBI& s!ZW'`4!z //保存下载信息(文件指针位置) F`0c?) private void write_nPos() <*"pra{3 { #)0Tt>d6 try{ D!}K)T1~R output = new DataOutputStream(new FileOutputStream(tmpFile)); w,Zx5bBg% output.writeInt(nStartPos.length); .S!>9X,
for(int i=0;i<nStartPos.length;i++) XDkS
^9 { "f|(@a // output.writeLong(nPos); Z-SwJtWk output.writeLong(fileSplitterFetch.nStartPos); AB"1(PbG output.writeLong(fileSplitterFetch.nEndPos); AL]h|)6QpC } oY%"2PW1B output.close(); a,~D+s;^ } R+E_#lP_$ catch(IOException e){e.printStackTrace ();} +Cf0Y2*@hM catch(Exception e){e.printStackTrace ();} iog #
, } H5Ux.]y 1a&/Zlr Wk`bb!P_ //读取保存的下载信息(文件指针位置) IAP/G5'Q private void read_nPos() cXS;z.M\_ { g={]Mzh try{ =!(*5\IM DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); mN\%fJ7 int nCount = input.readInt(); #9D/jYK1X nStartPos = new long[nCount]; SbS$(Gt#Bv nEndPos = new long[nCount]; =Y&9
qt for(int i=0;i<nStartPos.length;i++) 7-".!M { *%X6F~h(u nStartPos = input.readLong(); <E>7>ZL nEndPos = input.readLong(); "H>r-cyh } X-kXg)!Bg input.close(); -(\1r2
Y } x0\e<x9s catch(IOException e){e.printStackTrace ();} g.I(WJX0 catch(Exception e){e.printStackTrace ();} @s%X } ]<27Sw&yaG }_{y|NW =oE_.ux\ private void processErrorCode(int nErrorCode) %cH8;5U40 { >vWEUE[ System.err.println("Error Code : " + nErrorCode); {I0w`xe } R=-+YBw7/ 6exI_3A4jh {TyCj?3 B //停止文件下载 vv+TKO public void siteStop() =X%!YZk p { CifA,[l34 bStop = true; \U/v;Ijf for(int i=0;i<nStartPos.length;i++) _*s~`jn{H fileSplitterFetch.splitterStop(); 1ZT^)/ G C,o: ]SFWt/< } ,{k<JA{ } w#*/ y?"D //负责部分文件的抓取 m_a^RB( **FileSplitterFetch.java \UQ9MX _ */ bqSMDK package NetFox; jm+ V$YBP pe|X@o d9O:,DKf import java.io.*; ^6Yd} import java.net.*; wHx}U M" /K7Bae5h .>}BNy public class FileSplitterFetch extends Thread { *oCxof9JA Zr=ib BU`ckK\( String sURL; //File URL 5J
ySFG3 long nStartPos; //File Snippet Start Position _=pWG^a long nEndPos; //File Snippet End Position
Nj+a2[ int nThreadID; //Thread's ID `|nH1sHFq boolean bDownOver = false; //Downing is over TN5>" ??" boolean bStop = false; //Stop identical z<!O!wX_aI FileAccessI fileAccessI = null; //File Access interface Tr~sieL $!f!,fw+ 80C(H!^ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException cS4DN { u^t$cLIZ this.sURL = sURL; 7'z(~3D this.nStartPos = nStart; p!_[qs this.nEndPos = nEnd; Nb0Ik/:< nThreadID = id; q]CeD fileAccessI = new FileAccessI(sName,nStartPos);//定位 Zae.MO^C! } C0QM#"[ zVw:7- O5zE {# public void run() RND9D\7 { e?b)p5g while(nStartPos < nEndPos && !bStop) e4DMO*6 { t8P PE j
C)-`_ )n>+m|IqY( try{ /&r|ec5 URL url = new URL(sURL); 4ZwKpQ6 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); nBkh:5E5% httpConnection.setRequestProperty("User-Agent","NetFox"); Zyu/|Og String sProperty = "bytes="+nStartPos+"-"; -\4zwIH httpConnection.setRequestProperty("RANGE",sProperty); iPvuz7j=h Utility.log(sProperty); 3@_Elu E$A3|rjnoN ygzxCn|# InputStream input = httpConnection.getInputStream(); gv|"OlB //logResponseHead(httpConnection); <F(><Xw,-4 )"|||\Iv Wpr
,jN8b byte[] b = new byte[1024]; tlQC6Fb# int nRead; -R
b{^/ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) wP<07t[-g { WF[bO7: nStartPos += fileAccessI.write(b,0,nRead); ^nNitF
//if(nThreadID == 1) * ?]~
# // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); XogVpkA } d|lpec Hr^3`@}#1 yCP4r6X0 Utility.log("Thread " + nThreadID + " is over!"); F9a^ED0l\ bDownOver = true; u5+|Su //nPos = fileAccessI.write (b,0,nRead); 69OF_/23 } p*20-!{A catch(Exception e){e.printStackTrace ();} 9t$]X>} } -1u9t4+` } Gh\q^?} }ptq
)p iM]o"qOQm //打印回应的头信息 _>yoX public void logResponseHead(HttpURLConnection con) 2VGg 6% { NxA)@9Q for(int i=1;;i++) ]uQqn]+I! { yN6>VD{F String header=con.getHeaderFieldKey(i); yZkyC'/ if(header!=null) B*3Y!! //responseHeaders.put(header,httpConnection.getHeaderField(header)); /.z;\=;[n! Utility.log(header+" : "+con.getHeaderField(header));
rsXq- Pq* else ~1L:_Sg* break; )B$;Vs]@i } ,|kDsR! } 4\M.6])_ .2)
=vf'd Sa1l=^ public void splitterStop() jMNU ?m: { \S~Vx!9w bStop = true; kwpK1R4zs } YXo|~p;=Y Qnd5X`jF# *%/~mSx } umi5Wb< QPtGdd kOo~%kcQ' /* Z|"p*5O, **FileAccess.java 7R!5,Js+ *//文件访问(定位,写) L|@y&di package NetFox; \*f;X aa import java.io.*; Vv1|51B R:Q0=PzDi# Z_1U9+, public class FileAccessI implements Serializable{ 91>fqe _BdE<
!r //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 VA*y|Q6 RandomAccessFile oSavedFile; `K~AhlJUQ long nPos; YQJ==C1 )WT>@ JM1R ;i6 public FileAccessI() throws IOException X3'H
`/ { r}[7x]sP this("",0); <S?ddp2 } J]f3CU,<N tyaA\F57 iY"l}.7) public FileAccessI(String sName,long nPos) throws IOException ?v>ET2wD { m3Il3ZY. oSavedFile = new RandomAccessFile(sName,"rw"); ?T+q/lt4 this.nPos = nPos; 4jD2FFG-
G oSavedFile.seek(nPos); -'~LjA( } C4TE-OM8 (Jz;W<E #9K-7je;j public synchronized int write(byte[] b,int nStart,int nLen) NaX { 23~Sjr
int n = -1; @v}/zS try{ )iFJz/n> oSavedFile.write(b,nStart,nLen); r@ZJ{4\Q n = nLen; `ZC<W]WYX/ } yX~v-N!X catch(IOException e) x?&$ ci { \7CGUB>L e.printStackTrace (); bw\@W{a%q } c y8;@[#9 ;G%R<Z Ja9e^`i; return n; 6?w0 } `r?7oxN BCA&mi3q IIbYfPiO } e=.]F*:J =Q\r?(Iy 8YbE`32 /* cFJY^A **SiteInfoBean.java MdW]MW{ */ b9!FC$^J package NetFox; P'_H/r/# N0r16# -g @Z12CrJ public class SiteInfoBean { !jTcsN% fZoHf\B]{ >Z5gSs0 private String sSiteURL; //Site's URL %\:[ o private String sFilePath; //Saved File's Path _ jsK}- \ private String sFileName; //Saved File's Name >G%o,9i private int nSplitter; //Count of Splited Downloading File K57&yVX `G}TG( -X"p:=;j public SiteInfoBean() Hg=";,J {//nSplitter的缺省值为5 va0{>Dc+ //default value of nSplitter is 5 r8xv#r 1 this("","","",5); 5;YMqUkw } ax<?GjpM R21b!Pd\ C)`Fv=]R public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) c_4[e5z { N u<_} sSiteURL= sURL; `)_dS&_\ sFilePath = sPath;
@fl-3q sFileName = sName; #
mV{#B= this.nSplitter = nSpiltter; .N
,3od@ 1ng!G 7g N/MUwx;P } Hl{S]]z ;wz^gdh;
zem8G2#c public String getSSiteURL() ~f$|HP} { |#]@Z)xa return sSiteURL; I|^;B8[ } 7$CBx/X50) .y!<t} [OC5l> public void setSSiteURL(String value) n>BkTaI { {xXsBh
Y sSiteURL = value; PHZ0P7 } _V7s#_p pKpUXfQu ,$s8GAmq public String getSFilePath() VY
| _dk { `d5%.N return sFilePath; bk;?9%TW } "_-Po^u=r ywGd> @ \LR~r%(rM public void setSFilePath(String value) Oo5w?+t { Yc_8r+;( sFilePath = value; <
$J>9k } 6dabU* [q?<Qe kMi/>gpQ public String getSFileName() 1OCeN%4]Qk { IzikDc10 return sFileName; k/#&qC>] } gQWa24 6#7Lm) g8 X[]m _@ v public void setSFileName(String value) xS4w5i2 { EofymAi% sFileName = value; ORe(]I`Z } Ugu[|, {o_X`rgrL $WyD^|~SF public int getNSplitter() iU$] {c2;A { b6nsg| return nSplitter; ]
o*#t } >`Y.+4mE ~$Tkn_w# ehzM)uK public void setNSplitter(int nCount) *"?l ]d { Tl(^ nSplitter = nCount; Xe6w| } sqEI4~514 } ciBP7>':: sGyeb5c k;K)xb[w | /* ^o^H3m **Utility.java 6G1@smP */ H$=e
-L`@ package NetFox; 7C,&*Ax,9 .{ocV#{s aoMqSwF= public class Utility { tNO-e|~' K-bD<X ah+~y,Gl public Utility() 5b*M*e&=C { 15%w 8u mw_~*Nc'9 YLqGRE`W } {IxA)v-` l1T m`7} //线程睡眠 ozmrw\_}[ public static void sleep(int nSecond) ?u{~> { QKyo`g7 try{ R n}l6kbM Thread.sleep(nSecond); (}{G`N>.{ } cc,^6[OH@ catch(Exception e) KC/=TSSXd. { {K+icTL3 e.printStackTrace (); :}5j##N } .:@Ykdm4I } JSkLEa~< dCE0$3'5 //日志 DnC{YK public static void log(String sMsg)
#bUXgn> { 2;zb\d System.err.println(sMsg); .n#@$
nGZ } &|Bc7+/P tX5"UQA fmQ_P.c public static void log(int sMsg) /M|262% { tXoWwQD;Y System.err.println(sMsg); /j4P9y^]= } u$>4F|=T } q"%_tS qs1 ?IYD (pY 7J /* N/Z2hn/m **TestMethod.java !ipR$ dM */ ]Y%Vio package NetFox; W?qmp|YD 2/?`J 43|XSyS public class TestMethod { +aJ>rR ,VCyG:dw v9:9E|,U+ public TestMethod() ur3(HL { ///xx/weblogic60b2_win.exe kddZZA3` try{ x,rlrxI SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); eIz<)-7: //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ,5|&A SiteFileFetch fileFetch = new SiteFileFetch(bean); G`n_YH084 fileFetch.start(); Q?nN!eT } ]Bcp;D catch(Exception e){e.printStackTrace ();} {l>yi v*;-yG& H7d/X } +_; l|uhT; Ont%eC\ nSW=LjrO~< public static void main(String[] args) 7[> 6i { y`F3Hr c new TestMethod(); m;'6MHx; } ]~aF2LJ_q } )+[ gd/<C. 点击下载更多相关资料
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