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/* VJHHC.Kz **SiteFileFetch.java '{6`n5:e */ Q7c_;z_ package NetFox; >fs-_>1d import java.io.*; &\Cvrxa import java.net.*; h/-7;Csv kFD- !j YV,:' public class SiteFileFetch extends Thread { fp12-Hk ~
s.GTY@t w[4SuD SiteInfoBean siteInfoBean = null; //文件信息Bean VFA1p)n long[] nStartPos; //开始位置 D8[&}D4 long[] nEndPos; //结束位置 ?:n{GK FileSplitterFetch[] fileSplitterFetch; //子线程对象 K=`*cSU> long nFileLength; //文件长度 mn0QVkb}lc boolean bFirst = true; //是否第一次取文件 uz'beE boolean bStop = false; //停止标志 #)cRD#0 File tmpFile; //文件下载的临时信息 s#*
mn DataOutputStream output; //输出到文件的输出流 aoF>{Z4&B 0b*a2_|8k //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) r<C^hs&] public SiteFileFetch(SiteInfoBean bean) throws IOException 9R.tkc|K { F<IqKgGzH siteInfoBean = bean; r OB\u|Pg //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); H~Q UN tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); nR"k%$ if(tmpFile.exists ()) z:<(b { c%uhQ62 bFirst = false; G*J(4~Yw} read_nPos(); 7Dm^49H } |G%MiYd else $I1p"6 { Hyee#fB nStartPos = new long[bean.getNSplitter()]; /!AdX0dx nEndPos = new long[bean.getNSplitter()]; ?>lmLz!e } g`J? 2
_] WNL3+ YT&_{nL#\ A 9tQb: } mT-5Ok&TUe pF"z)E|^ DC/CUKE.d public void run() )]qFI"B7 { D0x+b2x^ //获得文件长度 ZU "y< //分割文件 fJ\Ys;l[j //实例FileSplitterFetch !+fHdB //启动FileSplitterFetch线程 e,1Jxz4QH //等待子线程返回 =
b)q.2'# try{ jl:O~UL6i if(bFirst) &BE[=& | { ]$*N5Y nFileLength = getFileSize(); q{ctHs Q(9 if(nFileLength == -1) 4r5,kOFWb { mX |AptND System.err.println("File Length is not known!"); *FG@Dts^& } ""WZpaw else if(nFileLength == -2) *=;=VUu5 { WtlIrdc System.err.println("File is not access!"); d,D)>Y'h } RKBjrSZg8 else c wpDad[Kx { x$s #';* for(int i=0;i<nStartPos.length;i++) }3?M0 : { E176O[(V= nStartPos = (long)(i*(nFileLength/nStartPos.length)); =20Q!wcu } Tmw
:w~ for(int i=0;i<nEndPos.length-1;i++) GXHk{G@TS { u\t ; nEndPos = nStartPos[i+1]; MGmtA( } .3HC*E.e nEndPos[nEndPos.length-1] = nFileLength; 4AF"+L } W}.4$f> } EO|
kiC h+$_:](PC H!45w;,I //启动子线程 h_CeGl!M} fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; _k
j51= for(int i=0;i<nStartPos.length;i++) 0p[$8SCJ { 3'.OghI fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 01w=;Q siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), (U7%Z< nStartPos,nEndPos,i); H=yD}!j Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); WO}JIExy fileSplitterFetch.start(); 8D+OF 6CM } gE$dz#t. // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), T`W FY siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); 0kiW629o // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", f}+G;a9Nj nEndPos = " + nFileLength); [C d2L&9 // fileSplitterFetch[nPos.length-1].start(); ^|sQkufo 2nEj
X\BY ?>AhC{ //等待子线程结束 !'[sV^ds //int count = 0; v4ueFEY //是否结束while循环 FS@SC`~( boolean breakWhile = false; vb70~k \<PX'mnO <`N\FM^vo while(!bStop) M(2[X/t { zJx<]=] write_nPos(); chiQ+ Utility.sleep(500); T+~~w'v0 breakWhile = true; 6%yr>BFtVV L4[bm[x z5i!GJB for(int i=0;i<nStartPos.length;i++) r^\^*FD | { rg P$\xn- if(!fileSplitterFetch.bDownOver) |Y])|`_'G { (JM4W
"7' breakWhile = false; M!I:$DZt break; wLgRI$_Dm } h]D=v B } q,*IR*B:a if(breakWhile) T}\U:@b break; iYnw?4Y I&cb5j]C nrf%/L //count++; MT V'!Zxs //if(count>4) pw$I~3OFd // siteStop(); $OUa3!U_! }
&bL1G(} nTHP~] fqr}tvMr=T System.err.println("文件下载结束!"); 9:kb0oBa?l } N..u<06j/ catch(Exception e){e.printStackTrace ();} da-3hM!u+ } Q \{\uJ x prm <<A@69"4n //获得文件长度 leD?yyjw7 public long getFileSize() 9j,zaGD0 { *3k~%RM%? int nFileLength = -1; @TH \hr] try{ |Jq/kmn URL url = new URL(siteInfoBean.getSSiteURL()); J*;t{M5 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); pH*L8tT
httpConnection.setRequestProperty("User-Agent","NetFox"); fe Q%L d)0%|yX6 6=kd4'yV int responseCode=httpConnection.getResponseCode(); kB8l`|
I if(responseCode>=400) |_ @iaLE { tl4;2m3w processErrorCode(responseCode); ML'R[~| return -2; //-2 represent access is error x x
'XR'zK } O-G@To3\ F0|T%!FB>%
AI)9E=D% String sHeader; 'Gc6ZSLM "90}H0(+ <D 5QlAN for(int i=1;;i++) $DQ
-.WI { Y#Z&$&n //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); bWyXDsr+ //Utility.log(in.readLine()); ,wFLOfV@ sHeader=httpConnection.getHeaderFieldKey(i); 7<KRB\)b& if(sHeader!=null) FIS-xpv$ { `"bm Hs7 if(sHeader.equals("Content-Length")) rLVAI#ci= { I m
Tq` nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); MKH7d/x break; p\,lbrv } TJVNR_x } Zc"]Cv( else [OT@gp: break; 6^wiEnA } ~{N|("nB } z1L. catch(IOException e){e.printStackTrace ();} x:@e ID catch(Exception e){e.printStackTrace ();} O a7W&wi 6znm?s@~ sX=!o})0 Utility.log(nFileLength); |M0TG ~svu0[Vx 2f-Z\3)9 J return nFileLength; $4L=Dg } E+Gea[c ))MP]j9
T U}
g%`< //保存下载信息(文件指针位置) B(>_.x#kv private void write_nPos() ~L1N1Z)Kk { n_w,Ew,>5 try{ 36j.is output = new DataOutputStream(new FileOutputStream(tmpFile)); 1%+0OmV& output.writeInt(nStartPos.length); ;J`X0Vl$ for(int i=0;i<nStartPos.length;i++) ]f-e/8$`@ { ,%:`Ll
t]$ // output.writeLong(nPos); p3Gj=G output.writeLong(fileSplitterFetch.nStartPos); F4PD3E_# output.writeLong(fileSplitterFetch.nEndPos); @hv9=v+ } 5G2u(hx output.close(); Tq?W @DM* } X)|%[aX}q catch(IOException e){e.printStackTrace ();} `SU;TN0 catch(Exception e){e.printStackTrace ();} xr=f9?%R } pu^1s#g8w f8n'9HOw> ]-q:Z4rb //读取保存的下载信息(文件指针位置) tF;aB* private void read_nPos() kP| !!N { ^@ux try{ ZuE0'9 DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); PJ_|=bn int nCount = input.readInt(); 1DBzD%@Oz nStartPos = new long[nCount]; 6suc0 nEndPos = new long[nCount]; G(4k#jB for(int i=0;i<nStartPos.length;i++) 00Rk %QV { y_nh~& nStartPos = input.readLong(); .5T7O_%FP nEndPos = input.readLong(); {!="PnB } 6z(_^CY input.close(); 1"k
+K~: } j9,X.?Xvx catch(IOException e){e.printStackTrace ();} {wm
` catch(Exception e){e.printStackTrace ();} *R:nB)(6< } 'R$~U?i8 J)(pGS@ EuAa private void processErrorCode(int nErrorCode) :')<|(Zy { 65}:2l2< System.err.println("Error Code : " + nErrorCode); o 1b#q/ } 0 Hq$h A76=^iw c=K M[s. //停止文件下载 7j]@3D9[:p public void siteStop() 6D+9f{~r { d
EXw=u bStop = true; (2{1m#o for(int i=0;i<nStartPos.length;i++) J|>P,x#G fileSplitterFetch.splitterStop(); \ pq]q FYi<+]HZ #a0 (Wh7 } g"!B
| } i^W\YLE //负责部分文件的抓取 H<>x_}& **FileSplitterFetch.java 5n"'M&Ce */ )PwDP package NetFox; ;^xku%u Z2ZS5a c2y5[L7? import java.io.*; KSexG:Xb import java.net.*; AvwX 2?tc ._nhW*
%++q+pa public class FileSplitterFetch extends Thread { p'R}z|d) ?iq:Gf i\3`?d String sURL; //File URL l^SKd long nStartPos; //File Snippet Start Position
AKHi$Bk long nEndPos; //File Snippet End Position M^bujGD int nThreadID; //Thread's ID <?I~ + boolean bDownOver = false; //Downing is over v3[
2!UXq boolean bStop = false; //Stop identical U"ZDt FileAccessI fileAccessI = null; //File Access interface =A,i9Z& [3\}Ca1 ge E7<"m% public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException +`9T?:fu { VJPt/Dy{ this.sURL = sURL; 8L<Ol this.nStartPos = nStart; 8J@REP4 this.nEndPos = nEnd; OW6i2 >Or nThreadID = id; Z*oGVr
g fileAccessI = new FileAccessI(sName,nStartPos);//定位 Gz
kf } f-3lJ?6 1|Fukx<@J< p{88v3b6 public void run() BK-{z).) { >`t
|a while(nStartPos < nEndPos && !bStop) M,7v}[Tbl { T]0qd^\4w 9]|cs uv Z!3 UH. try{ g4U%(3,>D URL url = new URL(sURL); k/*r2 C HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %SIbpk% httpConnection.setRequestProperty("User-Agent","NetFox"); 0Pbv7)=XL String sProperty = "bytes="+nStartPos+"-"; SkS
vu} httpConnection.setRequestProperty("RANGE",sProperty); Qxt,@<IK Utility.log(sProperty); Es)Kw3^a B1\}'g8%f $2\OBc= InputStream input = httpConnection.getInputStream(); \QQw1c+ //logResponseHead(httpConnection); 2 y,f `2}Mz9mk RtN5\ byte[] b = new byte[1024]; Z+E@B>D7A^ int nRead; >12phLu while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) va| 1N/& { 6>zO"9 nStartPos += fileAccessI.write(b,0,nRead); xa ??OT`( //if(nThreadID == 1) yX/ 9jk // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {Q I"WFdGx } >q"mI6F TU^UR}=lP [Jwo,?w Utility.log("Thread " + nThreadID + " is over!"); 3N[t2Y1r bDownOver = true; Qv|A^%Ub! //nPos = fileAccessI.write (b,0,nRead); 8-+Ce;h } j0>Q:hn catch(Exception e){e.printStackTrace ();} B&VruOP0 } 1 VcZg%I } 4Un (}P' ( hp 52Vse ^cn%]X#. //打印回应的头信息 -X3yCK?re public void logResponseHead(HttpURLConnection con) JUHmIFjZ { i]Njn k for(int i=1;;i++) VG_ PBG( { iz.J._& String header=con.getHeaderFieldKey(i); (_ HwU/ if(header!=null) {Cd Q)| //responseHeaders.put(header,httpConnection.getHeaderField(header)); Cjc>0)f&. Utility.log(header+" : "+con.getHeaderField(header)); $SQUN*/> else #rD0`[pz break; yS'W ss
} @y]ek/ } P{-j^'y f#f<Ii <Nwqt[. public void splitterStop() H65><38X/ { z@Pv~" bStop = true; + Nn
$ } MVP|l_2! lY
-2e> uGt}H n } fqpbsM;M] <;kcy :s ",O |uL /* wIQ~a **FileAccess.java CiF(
*//文件访问(定位,写) 6Ft?9
B(F: package NetFox; .Q!_.LX import java.io.*; GBeWF-`B 3EkCM_] L)(JaZyV5 public class FileAccessI implements Serializable{ .bYZkO:oy LY:%k|L9 //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 5-*hAOThg RandomAccessFile oSavedFile; )+7|_7
!x long nPos; Eqizx~e qq |#(KP "%peYNZ&% public FileAccessI() throws IOException $|"Y|3&X { (/gv
U80 this("",0); .q90+9Ek= } d6^:lbj *jR4OY|DXH #B2a? public FileAccessI(String sName,long nPos) throws IOException ~ECIL7, { t|PQ4g< oSavedFile = new RandomAccessFile(sName,"rw"); _"%hcCMw this.nPos = nPos; ^/~ZP?%] oSavedFile.seek(nPos); 2t7P| b~V1 } dl]pdg< 9\'JtZO r1axC% public synchronized int write(byte[] b,int nStart,int nLen) *"nN To { "hmLe(jo} int n = -1; HKL/D try{ 5^ck$af oSavedFile.write(b,nStart,nLen); `5Bv2wlIV n = nLen; WKAG)4 } G{.[o6> catch(IOException e) 5rb<u>e{ { ,<=gPs;x e.printStackTrace (); jn4|gQ } J`]9n>G AQ&vq$ pwH*&YU return n; 0u;a*#V @ } S{m:Iij[; Kf-XL),3l 2qdc$I&$ } &S=Qu?H cQkj{u
Y\Z6u) /* ppo.# p0w **SiteInfoBean.java s3Wjhw/ */ 9Af nMD package NetFox; fH@cC` 4.Q[Tu ?)ct@,Ek$ public class SiteInfoBean { Jkv!]C 25f[s.pv8 $Zr \$z2 private String sSiteURL; //Site's URL x<`^4|< private String sFilePath; //Saved File's Path Ee_?aG
e& private String sFileName; //Saved File's Name Wks zNh private int nSplitter; //Count of Splited Downloading File ce;$)Ff\ lN&+<>a 8[.&ca/[ public SiteInfoBean() 2ql)]Skg6 {//nSplitter的缺省值为5 k.7!)jL7 //default value of nSplitter is 5 q44vI this("","","",5); A;5_/ 2 } T+x
/J]A }.(DQwC}1k MQDLC7Y.p5 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) bo/<3gR { ePZAi"k sSiteURL= sURL; Y4w]jIv sFilePath = sPath; giH#t< )W sFileName = sName; =E$bZe8 this.nSplitter = nSpiltter; [NJ2rQ/w7 ]8R@2L3s 1ni72iz\ } n&o"RE 0~0 KgbBa2@+ vz#-uw,O: public String getSSiteURL() pacD7'1{
{ ,}khu return sSiteURL; p^}`^>OL } %sPze] gG@4MXq. yY!)2{F+ public void setSSiteURL(String value) {qlcTc { q.<)0nk sSiteURL = value; l.]wBH#RS } w N`Njm9! r~JGs?GH vE8BB$D public String getSFilePath() oH&@F@r:+ { @;KYvDY return sFilePath; YjnQ@IfIH } IiRQ-,t1 (J.Z+s$:2 TBrwir public void setSFilePath(String value) X `EVjK { wkPjMmW+! sFilePath = value; ^|zag } IY8<^Q'] rM,f7hm[S* t2vm&jk public String getSFileName() ZA. SX|m { k!z<=WA return sFileName; -BI!ZsC' } @k)J
i!7 YmFg#eS g 8uq6U public void setSFileName(String value) F .Zk};lb { kr~n5WiAZ sFileName = value; wu
eDedz\ } L fcy#3! %*!6R:gAp 0{%@"Fb0O public int getNSplitter() ME0u|_dPjz { nyqX\m- return nSplitter; vV$t`PEY } uq-`1m} vdvnwzp!l l1lYb;C public void setNSplitter(int nCount) 4H,c;g=! { P (7Q8i' nSplitter = nCount; %i/|}K } w'
J`$= } Q|{b8K [jlum>K "P@ SR`v# /* ~+0IFJ `} **Utility.java `:~Wu/Ogr */ ,{S $&g* package NetFox; %Rf9KQ #oa>Z.?_V /;Hqv`X7 public class Utility { BF2U$-k4 Ri`6X_xU !*~QB4\2b public Utility() i.W*Go+ { bri8o" &}Wi@;G]2 7- LjBlH } C{^I}p LXxQI(RO //线程睡眠 _+aR|AEC public static void sleep(int nSecond) /D;ugc*3 { U7jDm>I try{ k*6"!J%A Thread.sleep(nSecond); b:~#;$g } {*hvzS{1d catch(Exception e) n!~ $Z/ { u&S0 e.printStackTrace (); fgj$
u } U _A'/p^D } >0ZG&W9 GXD<X_[ //日志 9)S3{i6w public static void log(String sMsg) <+q`Dk { :NWIUN System.err.println(sMsg); Z&iW1 }
<a=OiY ]R}(CaT1 yFmy public static void log(int sMsg) M6Xzyt| { hO3
q|SL System.err.println(sMsg); >m;nt}f'+ } sm{0o$\Z } nu1XT 1q1
*BM#fe 2!W[ff@~7 /* /8l@ndZf **TestMethod.java :
KFK2yD */ pi#a!Quf\ package NetFox; `'XN2-M8 F|m &n& 73'A Q")UJ public class TestMethod { M1NdlAAf !Z\Gv1 z>,tP public TestMethod() _fY9u2Y { ///xx/weblogic60b2_win.exe i
g7|kl try{ 0$-|Th:o SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); D8~\*0-> //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); k%Tp9x$ SiteFileFetch fileFetch = new SiteFileFetch(bean); ?#&[1.= u fileFetch.start(); >m!Z$m([J } TTa3DbFp% catch(Exception e){e.printStackTrace ();} ,38M6yD acUyz2x hPG@iX|V } w<h8`K`3 L.-qTh^P |k]]dP|:' public static void main(String[] args) jxm#4 { <<gW`KF
new TestMethod(); z ULHgG } ?-3G5yy } *Od?>z 点击下载更多相关资料
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