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/* qL;OE.?oA **SiteFileFetch.java 4=BIYC"Lu */ 3PmM+}j3 package NetFox; #@rvoi import java.io.*; Q L0 import java.net.*; ZDQc_{e{ |"j{!Ei S.u1[Yz^ public class SiteFileFetch extends Thread { s7"NK" ]Alv5?E60 u,E_Ezq SiteInfoBean siteInfoBean = null; //文件信息Bean 8%eWB$<X long[] nStartPos; //开始位置 UDBMf2F] long[] nEndPos; //结束位置 !
MTmG/^ FileSplitterFetch[] fileSplitterFetch; //子线程对象 O)bc8DyI long nFileLength; //文件长度 T?4pV# boolean bFirst = true; //是否第一次取文件 XLu Y boolean bStop = false; //停止标志 ~Ox !7Lp File tmpFile; //文件下载的临时信息 }Kt`du= DataOutputStream output; //输出到文件的输出流 2=\} 0 Nk#[~$Q-1 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) (hB+DPi public SiteFileFetch(SiteInfoBean bean) throws IOException })?t:zX#* { <D_UF1Pk siteInfoBean = bean; ?pBQaUl& //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); ,QB]y|: tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Fv| )[>z0 if(tmpFile.exists ()) 2LO8SJ# { S2;u!f bFirst = false; \
5&-U@ read_nPos(); r]sNI[ } d[0R#2y= else DlMT<ld { | e?:Uq nStartPos = new long[bean.getNSplitter()]; bS1?I@ nEndPos = new long[bean.getNSplitter()]; )#(6J } ~AvB5 4qsP/`8 C2X$ bX" bfE4.YF } TJ_<21a }0y2k7^] |c<h&p public void run() bR\Oyd~e { [}mx4i //获得文件长度 JZl"k //分割文件 6Z}8"VJr { //实例FileSplitterFetch ,8tk]W[C //启动FileSplitterFetch线程 m }J@w~# //等待子线程返回 w
\ U?64 try{ fk6`DUBV if(bFirst) tgR4C#a { SsY:gp_ nFileLength = getFileSize(); eBZ94rA] if(nFileLength == -1) s"'ns { >bLhCgF:" System.err.println("File Length is not known!"); F|wT']1Y } @mD$Z09~ else if(nFileLength == -2) hI$IBf> { -eQ>3x&3r System.err.println("File is not access!"); f>!H<4
] } D\4pLm"!v else Pg''>6w> { hy]8t1894 for(int i=0;i<nStartPos.length;i++) -4;$NiB? { vWs#4JoG nStartPos = (long)(i*(nFileLength/nStartPos.length)); ` P,-NVB } O>KrTK-AV for(int i=0;i<nEndPos.length-1;i++) x+Ws lN2a { : Yb_ nEndPos = nStartPos[i+1]; 2]UwIxzR } K!<3|d nEndPos[nEndPos.length-1] = nFileLength; 83i;:cn } Jv8JCu"eky } )wM881_! )w_hbU_Pb& aA6m5 //启动子线程 75"&"*R/*G fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; {0o,2]o!: for(int i=0;i<nStartPos.length;i++) YXlaE=9bn { <K:L.c! fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {Qf/.[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 9< |nJt nStartPos,nEndPos,i); H"; !A=0 Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); l:.q1UV fileSplitterFetch.start(); Ai*+LSG } 1C5~GI ` // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), JYK4/gJ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); k^{}p8;3 // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", SR$?pJh D% nEndPos = " + nFileLength); %_L~"E 2e // fileSplitterFetch[nPos.length-1].start(); $ dR@Q?_{ INRP@Cp1 U&'Xsz //等待子线程结束 8+n*S$ //int count = 0; wqasI@vyu //是否结束while循环 &-c{ boolean breakWhile = false; ev[!:*6P mb?r{WCi `gSJEq while(!bStop) X
2Zp@q( { p6&6^v\ write_nPos(); ']:>Ww.S Utility.sleep(500); ?Z2_y- breakWhile = true; ;39~G T +UX~TT: Swxur+hfH for(int i=0;i<nStartPos.length;i++) 9}|t`V" { :m[HUh if(!fileSplitterFetch.bDownOver) 3n)\D<f]# { tE$oV breakWhile = false; ;[q> break; V2B:
DIpr } AT- } U:fGIEz{ZY if(breakWhile) vPSY1NC5 break; WX&0;Kr G
Tz>}@W mcb|N_#n/ //count++; 6[3>[ej:x //if(count>4) eAK=ylF; // siteStop(); Yc-gJI*1 } 6#;u6@+}yy y6P-:f/&* ,KaO8^PB System.err.println("文件下载结束!"); ~(-df> } HXP/2&|JY catch(Exception e){e.printStackTrace ();} u):Nq<X } Z&6*8#wn 8FJPw"9 G\B:iyKl //获得文件长度 1#lH5|XQ public long getFileSize() ~93#L_V_O { I~&*8)xM int nFileLength = -1; ?hOvY) try{ `s\E"QeZN URL url = new URL(siteInfoBean.getSSiteURL()); ^5Ob(FvU HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); /_V4gwb}|- httpConnection.setRequestProperty("User-Agent","NetFox"); Is(ZVI 'R
nvQ"" _}l7f int responseCode=httpConnection.getResponseCode(); X_ (n if(responseCode>=400) jMP;$w { >/9Qgyc0 processErrorCode(responseCode); ~mvD|$1z return -2; //-2 represent access is error Q[&CtM
} i{}Q5iy S.*.nv 4<S=KFT_ String sHeader; .GiQC{@9w 4v#A#5+O E =PmIrvr'[5 for(int i=1;;i++) N 8pzs" { feT.d +Fd //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); vPET'Bf(YV //Utility.log(in.readLine()); \^Z DH sHeader=httpConnection.getHeaderFieldKey(i); '=(@3ggA: if(sHeader!=null) "rcV?5?v~ { !U~S7h} if(sHeader.equals("Content-Length")) MmW]U24s { Eikt, nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); Wo,fHY break; nq*D91Q } gezZYP)d } i,mo0CSa else Df}3^J~JX break; "[2D&\$ } s>a(#6Q } t}2M8ue(& catch(IOException e){e.printStackTrace ();} SV i{B* catch(Exception e){e.printStackTrace ();} 3
Bn9Ce= 8RJa;JsH :pGgxO% q Utility.log(nFileLength); |K'7BK_^J D)J'xG_<O f=Kt[|%'e return nFileLength; 10ZL-7D#m } mO@Sl(9 VR vX^w0 vve[.Lud' //保存下载信息(文件指针位置) F=V_ACU private void write_nPos() B0ZLGB { vf
h*`G$ try{ Wq/0 }W. output = new DataOutputStream(new FileOutputStream(tmpFile)); ($s%B output.writeInt(nStartPos.length); r95$( N for(int i=0;i<nStartPos.length;i++) M6*8}\ { rE4qPzL // output.writeLong(nPos); -3Auo0 output.writeLong(fileSplitterFetch.nStartPos); y9-}LET3j
output.writeLong(fileSplitterFetch.nEndPos); Wf9K+my } kg()C%#u
output.close(); |&\cr\T\r } `l<pH<F catch(IOException e){e.printStackTrace ();} =>Dw,+" catch(Exception e){e.printStackTrace ();} h 7*#;j } ~.TKzh'eB Ku;8Mx{ ~MZ.988:< //读取保存的下载信息(文件指针位置) rtk1 8U- private void read_nPos() j(`V&S { ZN-5W|' O try{ RLUH[[ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); ~n9- int nCount = input.readInt(); 1"
#W1im nStartPos = new long[nCount]; zHt}`>y& nEndPos = new long[nCount]; 1/vcj~|)t for(int i=0;i<nStartPos.length;i++) zK ir {
]tO9< nStartPos = input.readLong(); GFO(O nEndPos = input.readLong(); #)28ESj } : t6.J input.close(); /rmm@ } =f-.aq(G/ catch(IOException e){e.printStackTrace ();} Xd@x(T~'X catch(Exception e){e.printStackTrace ();} gTqtTd~L } N0']t Gh2 m|cT)- = ms
o1 private void processErrorCode(int nErrorCode)
-TKQfd { ~0ZLaiJ System.err.println("Error Code : " + nErrorCode); 6)Dp2 } te8lF{R ]x`I@vSf7R XCku[?Ix //停止文件下载 jBnvu@K " public void siteStop() P1}Fn:Xe%7 { Vv5#{+eT; bStop = true; bhc
.UmH for(int i=0;i<nStartPos.length;i++) 1
Ll<^P fileSplitterFetch.splitterStop(); {;Ispx0m cb9q0sdf Q.`O;D}x } 09C[B+>h } 8A3!XA //负责部分文件的抓取 ]Qb85;0) **FileSplitterFetch.java Q]2v]PJ6" */ bx8|_K*^ package NetFox; Ex3V[v+D( @&E{
L *Zi:^<hv import java.io.*;
C#x9RW import java.net.*; c=A)_ZFg LG3:V'| %$.]g public class FileSplitterFetch extends Thread { {Tym# p?+*R@O 97n@HL1 String sURL; //File URL ]@UJ 8hDy long nStartPos; //File Snippet Start Position Lv`NS+fX long nEndPos; //File Snippet End Position ,c_NXC^X? int nThreadID; //Thread's ID Uq}-<q boolean bDownOver = false; //Downing is over ;~5w`F) boolean bStop = false; //Stop identical f MDM\&f FileAccessI fileAccessI = null; //File Access interface |UZhMF4/-L C!r9+z)< 6Jf\}^4@k public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException v5!G/TZ1 { KZ}F1Mr this.sURL = sURL; FD*w4U5 this.nStartPos = nStart; ,
,=7deR this.nEndPos = nEnd; ><Z`)}f nThreadID = id; V=|X=:fuih fileAccessI = new FileAccessI(sName,nStartPos);//定位 0/Wo":R: } p4-bD_ 4,pS C =2yg:D public void run() 235wl { X#!oG)or while(nStartPos < nEndPos && !bStop) ~Q)137u]P { 8!uqR!M<C 'WW[' crdp`}} try{ dJ0qg_ U& URL url = new URL(sURL); MVpk/S%W HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); y8.(filNB httpConnection.setRequestProperty("User-Agent","NetFox"); ,awp)@VG7 String sProperty = "bytes="+nStartPos+"-"; 7iJ=~po:o httpConnection.setRequestProperty("RANGE",sProperty); 7f9i5E1 Utility.log(sProperty); (ON_(MN
j.L`@ *l-(tp5 InputStream input = httpConnection.getInputStream(); )FfJ%oT} //logResponseHead(httpConnection); jS,zdJs= #r4S% rZBOWT byte[] b = new byte[1024]; e~,/Z\i int nRead; 6s"Erq5q while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Py)'%e { uBe1{Z nStartPos += fileAccessI.write(b,0,nRead); )~X*&(7RR} //if(nThreadID == 1) O]Mz1 ev| // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); '<YVDB&-d, } _(<D*V[ pWwB<F bl)iji`] Utility.log("Thread " + nThreadID + " is over!"); FGP~^Dr/ bDownOver = true; '"=Mw;p //nPos = fileAccessI.write (b,0,nRead); m%hUvG| i } J0hY~B~X catch(Exception e){e.printStackTrace ();} Q*+_%n1
/ } 8VwByk8
} `Oc`I9 *&vySyt ul',!js? //打印回应的头信息 1JU1XQi public void logResponseHead(HttpURLConnection con) u,6 'yB'u { /{~cUB,Um for(int i=1;;i++) S}rW=hO { -Oro$=% String header=con.getHeaderFieldKey(i); LK^t](F if(header!=null) !%x=o& //responseHeaders.put(header,httpConnection.getHeaderField(header)); Z~-A*{u? Utility.log(header+" : "+con.getHeaderField(header)); &@dWd else @YEdN}es break; J6H3X;vxQw } Ti@X<C } kXq*Jq VvO/
-k19BDJ,W public void splitterStop() +P~E54 { +C{ %pF bStop = true; [akyCb } z5CWgN q?=eD^] #<7ajmr } "/)}Cc,L 'S
f ZR3x;$I~4 /* #0HF7C3 **FileAccess.java xpf\S10e *//文件访问(定位,写) 3eV(2 package NetFox; 43mV ~Oj import java.io.*; 6'M"-9?G `3$S^|v =%:mZ@x' public class FileAccessI implements Serializable{ }@pe`AF^ mySm:ToT //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 1f 0"z1 RandomAccessFile oSavedFile; ms8PFu(f long nPos; r"a4;&mf }31z
35 7^bO` public FileAccessI() throws IOException %NbhR( { 0;-S){ this("",0); {.We%{4V } f.gkGwNk 7/;Xt& =W9;rQm public FileAccessI(String sName,long nPos) throws IOException k!]Tg"]JAh { "jVMk oSavedFile = new RandomAccessFile(sName,"rw"); T
x_n$ & this.nPos = nPos; P]Z}%
8^O oSavedFile.seek(nPos); <dTo-P } Te"<.0~1 )T6+} ,/\%-u?
1x public synchronized int write(byte[] b,int nStart,int nLen) |5}{4k~9J { a4
g~'^uC int n = -1; 0;Y_@UVj try{ f 8E
S
GU oSavedFile.write(b,nStart,nLen); u OEFb n = nLen; ;APpgt4 } FU0&EO catch(IOException e) lqOv_q { %}G:R!4 d e.printStackTrace (); DTdL|x.{ } _Y*:
l7 cI3uH1;# )gNHD?4x return n; V#W(c_g } TA=Ij,z~ ,\5]n&T;r Vkex&?>v$ } ^/HE_keY 7581G$@ym RIUJ20PfYQ /* :yvUHx **SiteInfoBean.java S<Q6b_D */ >P5 EW!d package NetFox; Dyp'a -aGv#!aIl -t
%.I=| public class SiteInfoBean { Dj>.)n 0[0</"K%1m ^HKxaW9W private String sSiteURL; //Site's URL `3r *Ae private String sFilePath; //Saved File's Path 8oY0?|_Bx private String sFileName; //Saved File's Name {S\cpCI` private int nSplitter; //Count of Splited Downloading File C+}uH:I'L J3Q.6e=7 8|7fd|6~ public SiteInfoBean() VLtb16| {//nSplitter的缺省值为5 c0Jf //default value of nSplitter is 5 Y(/VW&K&: this("","","",5); (~{7 e/)r } E/_=0t NF0} eom FFtj5e public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) @ky5XV { }mz4 3Sq< sSiteURL= sURL; xYRL4 sFilePath = sPath; LL-MZ~ZB sFileName = sName; \J0gzi. this.nSplitter = nSpiltter; =Ze~6vS, ,Mc}U9)F &nj@t>5Bs$ } VX&KGG.6 +YhTb O" ['.b public String getSSiteURL() &e[/F@\% { $K\\8$Z return sSiteURL; p=9G)VO } 1h]Dc(Oc#= n?aogdK$V \I#2Mq? public void setSSiteURL(String value) LtH;#Q { Yk<?HNf sSiteURL = value; &e_M \D } p%J,af V|xR`Q 0_qqBL.4 public String getSFilePath() *BBP"_$ { a+zE`uY
return sFilePath; K*;=^PY } X"8Jk4y tTF/$`Q#* )1J&tV*U public void setSFilePath(String value) _V6;`{$WK { F:IG3 @ sFilePath = value; HnioB=fc } v"_hWJ) &hd+x5 z7{b>oub(' public String getSFileName() r6 ,5&`& { 8Z/P<u return sFileName; 4<Bj;1*4 } kHX- AsRc 5@Ot@o L4}C%c\p* public void setSFileName(String value) 8*4X%a=Of { vYmRW-1Zxq sFileName = value; FL0(q>$*8 } InNuK0@ uGc}^a2 04:^<n+{ public int getNSplitter() )"A+T& { C#>c(-p>RC return nSplitter; zWB>;Z} } N}VKH5U| 3HFsR) &cayhL/% public void setNSplitter(int nCount) `<y2l94tL { |53Zg"! nSplitter = nCount; TS$ 2K } Q>JJI:uC4 } cl1h;w9s M*8Ef^-U`t /S\P=lcb /* 1/6 G&RB **Utility.java %{&yXi:mS */ Po(9BRd7 package NetFox; gAgzM?A1( noOG$P# @\z2FJ79w public class Utility { bb+-R_3Kd !4]wb!F yYp!s public Utility() =4m?RPb~b { JQi)6A?J ggJn oL O|?>rK } jUI'F4.5x- wb.47S8 //线程睡眠 aJOhji<b#L public static void sleep(int nSecond) MY4cMMjp~ { zg0)9br try{ P8).Qn Thread.sleep(nSecond); Kt;h'? } FJp~8
x= catch(Exception e) d*3k]Ie%5f { (Pbdwzao e.printStackTrace (); w2YfFtgD, } +P6q
wh\v } yWsNG;> @iS(P u //日志 ~*- eL. public static void log(String sMsg) E
Rqr0>x { |.)oV;9 System.err.println(sMsg); vtv|H } 5yuj}/PZ +0;6.PK yO]Vex5) public static void log(int sMsg) GFYAg { }tua0{N:z System.err.println(sMsg); ,L6d~>=41 } g"FG7E& } >ys>Q) w(eAmN:zR iLws;3UX;x /* S c_*L<$ **TestMethod.java @vCPX=c */ 4=%Uv^M package NetFox; #78p#E q+>{@tP9 m5v9:5{ public class TestMethod { XWf8ZZj B<I%:SkF@ m`}!
dBi public TestMethod() -*_D! { ///xx/weblogic60b2_win.exe k>FMy#N|@ try{ ZXY5Xvt:v SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); }f+If{ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); l|/h4BJ' SiteFileFetch fileFetch = new SiteFileFetch(bean); B-@6m fileFetch.start(); Tu?+pz`h } e_kP=|u)g catch(Exception e){e.printStackTrace ();} Nh^T,nv*l {W)Kz_ `M6!V } E*:!G 1j`-lD Q&opnvN public static void main(String[] args) lQ<2Vw#Yl { +\fr3@Yc new TestMethod(); =!*e; L } j#f+0 } C\ZL*,%} 点击下载更多相关资料
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