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/* '>|*j"jv- **SiteFileFetch.java z{3%Hq */ /Tf*d>Yh; package NetFox; ptcLJ]+) import java.io.*; 8*#][wC2 import java.net.*; f76| CotMV^ Z)O>h^0 public class SiteFileFetch extends Thread { A%*DQ1N wt.{Fqm M}oj!xGB SiteInfoBean siteInfoBean = null; //文件信息Bean 4`-?r%$,: long[] nStartPos; //开始位置 xFm{oJ!]& long[] nEndPos; //结束位置 +Q!xEfpO; FileSplitterFetch[] fileSplitterFetch; //子线程对象 SxW}Z_8x long nFileLength; //文件长度 p@8^gc boolean bFirst = true; //是否第一次取文件 KO]?>>5S6 boolean bStop = false; //停止标志 l6B ^sc*@ File tmpFile; //文件下载的临时信息 gqdB!l4 DataOutputStream output; //输出到文件的输出流 KaQq[a :y-0qzD? //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) mERZ_[a2 public SiteFileFetch(SiteInfoBean bean) throws IOException _ K+V?-= { 0HJqsSZ$mW siteInfoBean = bean; Go+xL/f //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); F}B/-".^ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); Ddl% V7 if(tmpFile.exists ()) 7YXXkdgbd { 'oiD#\t4 bFirst = false; ,6orB}w?z read_nPos(); LB*# } ~2A$R'x b else KpbZnW}g { FSwgPIO> nStartPos = new long[bean.getNSplitter()]; h>^jq{yu nEndPos = new long[bean.getNSplitter()]; :
9?Cm` } ,Z*3,/a @2~O^5[> 0o=6A<#x K]pKe"M } P$6f +{ :YJ7J4 R#7+ public void run() &X]=Qpl { ,4>WLJDo //获得文件长度 /Xu;/MMpd3 //分割文件 Z:o
86~su //实例FileSplitterFetch
TCKI //启动FileSplitterFetch线程 2.Eu+*UC //等待子线程返回 kJvy<(iG try{ ngkeJ)M0$ if(bFirst) '^F|k`$r { \;B$hT7z* nFileLength = getFileSize(); Zn<(,e if(nFileLength == -1) Gx h~ { 4j@kMe;RjZ System.err.println("File Length is not known!"); ySuLt@X } V:F+HMBk else if(nFileLength == -2) Ef_F#X0# { L=$?q/=- System.err.println("File is not access!"); -M1~iOb } c6Yf"~TD0 else csFJ5 { WJY4>7}{B@ for(int i=0;i<nStartPos.length;i++) N+C)/EN$ { \o62OfF! nStartPos = (long)(i*(nFileLength/nStartPos.length)); FU(}=5n } zhA',p@K?_ for(int i=0;i<nEndPos.length-1;i++) "doU.U&u { o! 2n}C nEndPos = nStartPos[i+1]; 3!"b
guE } u_p7Mcb nEndPos[nEndPos.length-1] = nFileLength; |`k1zc)9 } RvPniT(<? } PV]k3&y w`.T/ X #p o|,Q //启动子线程 G>[
NZE fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; BS-:dyBw for(int i=0;i<nStartPos.length;i++) ! =\DC,-CB { s#+"5&!s fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hs{&G^!jo siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), <w UD nStartPos,nEndPos,i); (?!(0Ywbg Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qlz9&w fileSplitterFetch.start(); ;e~{TkD } Msv*}^> // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), /jZaU` siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); yUD_w // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", Y0Hq+7x nEndPos = " + nFileLength); C>Omng1>^ // fileSplitterFetch[nPos.length-1].start(); 2xL!PR- :_o] F _uO!N(k. //等待子线程结束 Q{.{#G //int count = 0; -'O Q-5 //是否结束while循环 >/!7i3Ow- boolean breakWhile = false; 55>" R{q +7i7`'9pd I=4Xv<F while(!bStop) 8 l'bRyuS { >bX-!<S write_nPos();
o273|* Utility.sleep(500); e(OwS?K breakWhile = true; D4=..; IdV,%d{ ,YP1$gj for(int i=0;i<nStartPos.length;i++) "<PoJPh { [):{5hMA if(!fileSplitterFetch.bDownOver) 97qtJ(ESI { 5"-una>D breakWhile = false; }
*
?n?' break; h*;g0QBkl } b(PHZCy# } Sk6b`W7$ if(breakWhile) ;mf4U85 break; =_$XP dN$ 1$B^k a"0B?3*r46 //count++; kfMhw M8kP //if(count>4) QHHW(InG< // siteStop(); ZdE>C } a)3O? Y Vl5SL{+D _o@(wGeu# System.err.println("文件下载结束!"); G$?|S@I, } 4zo4H~@gk catch(Exception e){e.printStackTrace ();} ~q0I7M } [,OJX
N-4s W]@gQ(Ef 'GEBxNH: //获得文件长度 _u:>1] public long getFileSize() Qqd6.F { pP|,7c5 int nFileLength = -1; UJee&4C-y try{ /6+1{p URL url = new URL(siteInfoBean.getSSiteURL()); !cq=)xR HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); "C_T]%'Wm httpConnection.setRequestProperty("User-Agent","NetFox"); !GlnQ`T 5x*5|8 f,Sth7y int responseCode=httpConnection.getResponseCode(); ksB if(responseCode>=400) ES^>[2Y { ;j>*;Q` processErrorCode(responseCode); 0lX)Cl return -2; //-2 represent access is error mgi,b2 } [<]Y+33
Uby,Tu <U@P=G<t String sHeader; $7Jfb<y nkCecwzr- Sg-g^dIN1 for(int i=1;;i++) ,\BVV, { cU7rq j_ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Yta1` //Utility.log(in.readLine()); -Qg
2qN2{ sHeader=httpConnection.getHeaderFieldKey(i); |0tg:\. if(sHeader!=null) ./5jx2V { :z
B}z^8- if(sHeader.equals("Content-Length")) Ihdu1]~R{ { Gs+\D0o! nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ANckv|&'v break; 4rI:1yGt@ } T#\p%w9d } M,crz else q^Z~IZ8IT break; 'Pf_5q } LYp'vZ! } Nc{]zWL9 catch(IOException e){e.printStackTrace ();} Uh>.v |P6 catch(Exception e){e.printStackTrace ();} |r5e{ sC% b~ -@rxiC:Q Utility.log(nFileLength); ?Q@L-H` HV ;; D,MyI# return nFileLength; Ej'
7h~ =v } *Wzwbwg
h2"9"*S1 -g:lOht //保存下载信息(文件指针位置) DKh}Y
!Q=: private void write_nPos() L'>s(CR { 1<`9HCm try{ w|=gSC-o output = new DataOutputStream(new FileOutputStream(tmpFile)); N6h1|_o output.writeInt(nStartPos.length); 6MuWlCKF8 for(int i=0;i<nStartPos.length;i++) (YIhTSL"] { Z)/6??/R // output.writeLong(nPos); Am=wEu[b output.writeLong(fileSplitterFetch.nStartPos); \@i=)dA output.writeLong(fileSplitterFetch.nEndPos); =K:(&6f<t } \ZS\i4 output.close(); , 7Xqte } *9J1$Wa catch(IOException e){e.printStackTrace ();} hL0]R,t;' catch(Exception e){e.printStackTrace ();} (zY * 0lN } ,~- ?l7 v51EXf U|8[#@r //读取保存的下载信息(文件指针位置) So#dJ> private void read_nPos() _().t5< { r:-WzH(Ms try{ NH'iR!iGo DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); tev QW int nCount = input.readInt(); GJX4KA8J nStartPos = new long[nCount]; \k;U}Te< nEndPos = new long[nCount]; k5a\Sq} for(int i=0;i<nStartPos.length;i++) e$/&M*0\f { h2% J/69 nStartPos = input.readLong(); ;+
G9- nEndPos = input.readLong(); ^|aNG`|O } @44P4?; input.close(); J/t!-! } }w@gj"\H catch(IOException e){e.printStackTrace ();} aM$\#Cx catch(Exception e){e.printStackTrace ();} eaQ90B4 } f/ajejYo?, 6yI}1g k,rWa private void processErrorCode(int nErrorCode) _9NVE|c; { ET)>#zp+s System.err.println("Error Code : " + nErrorCode); a+41Ojv ( } J='W+=N 0N{+y}/G i&A%"lOI9 //停止文件下载 Ib1e#M3 public void siteStop() O6iCZ { W
(`c bStop = true; azo0{`S? for(int i=0;i<nStartPos.length;i++) < A?<N?%o fileSplitterFetch.splitterStop(); snYr9O[E6 Q2eXK[?* |) Pi6Y } t8&q9$ } Jf)3< ~G //负责部分文件的抓取 [?KJ9~+0 **FileSplitterFetch.java b{RqwV5P */ fYBH)E package NetFox; YUscz!rM Gy!P,a)z
55-D\n< import java.io.*; 9cQ_mgch import java.net.*; S5_t1wqBJ wVqd$nsY" [9V]On public class FileSplitterFetch extends Thread { F}U5d^!2 Fc8E Y* `5'2Hg+ String sURL; //File URL t\r:E2
O long nStartPos; //File Snippet Start Position \&a.}t long nEndPos; //File Snippet End Position .
uR M{Bs int nThreadID; //Thread's ID m=TJDr- boolean bDownOver = false; //Downing is over g_w&"=.jBq boolean bStop = false; //Stop identical aI(>]sWJ FileAccessI fileAccessI = null; //File Access interface ,+._;[k 5j eO"jB ]` ]g@v public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException =Ikg.jYq&F { kq-6HDR this.sURL = sURL; e"Rm_t this.nStartPos = nStart; 5)'P'kVi7. this.nEndPos = nEnd; o2=A0ogz? nThreadID = id; K=6UK%y
A fileAccessI = new FileAccessI(sName,nStartPos);//定位 \DA$6w\\ } XoR>H4xh +y&d;0! ?t rV72D public void run() `.=sTp2rbc { rg5]&<Vq8 while(nStartPos < nEndPos && !bStop) j'GtgT { j7
d:v7+_ J!h^egP '<@=vGsye try{ dTGA5c URL url = new URL(sURL); 7zDiHac HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); = .oHnMX2M httpConnection.setRequestProperty("User-Agent","NetFox"); *Oo &}oAj String sProperty = "bytes="+nStartPos+"-"; }nud httpConnection.setRequestProperty("RANGE",sProperty); NQ9Ojj{# Utility.log(sProperty); w#(RW7":F [f!O6moR6 c8A`<-\MfB InputStream input = httpConnection.getInputStream(); V5"HwN+` //logResponseHead(httpConnection); O8|*M " b |7ja_ 1;&;5 byte[] b = new byte[1024]; =Q(vni83< int nRead; 0{) $SY while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) 4vdNMV~ { +.Bmkim nStartPos += fileAccessI.write(b,0,nRead); &uM^0eM //if(nThreadID == 1) 7Kf}O6nE // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); (~s|=Hxq|- } f9TV%fG? Cca0](R*& 8o-bd_ Utility.log("Thread " + nThreadID + " is over!"); _:J*Cm[q bDownOver = true; ?Zz'|.l@ //nPos = fileAccessI.write (b,0,nRead); [@"wd_f{l } Owf.f;QR catch(Exception e){e.printStackTrace ();} )1F<6R } 'C?NJ~MN } Qw)9r{f }$gmK M>l^%` //打印回应的头信息 R,Oe$J< public void logResponseHead(HttpURLConnection con) {6
.o=EyM{ { \cuS>G for(int i=1;;i++) x<B'.3y { Yrn"saVc, String header=con.getHeaderFieldKey(i); Jx|I6y if(header!=null) HIf{Z* mb //responseHeaders.put(header,httpConnection.getHeaderField(header)); #^rU x. Utility.log(header+" : "+con.getHeaderField(header)); [-w@.^:]X else nr\q7 break; v{;7LXy0 } RL}KAGK } HDIk9WC^ Z=+03 NZXjE$<Vr public void splitterStop() Lz4ehWntO { Bw<rp- bStop = true; Z1,gtl ? } . (`3JQ2s
lCb+{OB y79qwM. } c-CYdi@ KN[d!}W: 6C-YyI#s# /* >HTbegi **FileAccess.java w+AuMc *//文件访问(定位,写) dpzw.Z package NetFox; ;IZ?19Q import java.io.*; g]$
4~"|. +,flE=5]s k#)Ad*t public class FileAccessI implements Serializable{ t})$lM (f1M'w/OD //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 q<{NO/Mm RandomAccessFile oSavedFile; +=3CL2{An long nPos; g-)mav cT'w= fCUT[d +H public FileAccessI() throws IOException [Ot,q/hBJ { 3]LN;s]ac this("",0); B)=~8wsI:Z } ($!KzxF3 rVryt<2:@r e!x6bR9EZ public FileAccessI(String sName,long nPos) throws IOException {aj/HFLNY { %c/^_. oSavedFile = new RandomAccessFile(sName,"rw"); %:u[MBe , this.nPos = nPos; $Ua56Y oSavedFile.seek(nPos); i|$z'HK;+ } t#~?{i@m F@vbSFv)/ Cmd329AH public synchronized int write(byte[] b,int nStart,int nLen) Rp.W,)i { eaZQ2 int n = -1; 7'w0 try{ Q/^A #l[ oSavedFile.write(b,nStart,nLen); sic$uT n = nLen; N:BL=}V } KSqTY>%fnv catch(IOException e) | {P|. { F=wRkU e.printStackTrace (); :Jxh2 } [aW = |X (2Zv^O ~1(j&&kXet return n; t/p $ } 1~5trsB+5 G$JFuz)| oRY!\ADR } IF_D Z \7 a4uc J)x3\[}Ye /* c{3rl;Cs **SiteInfoBean.java s:|M]. */ y!Cc?$]_Y package NetFox; ^^?q$1k6r* _
Jc2&(; <n0{7#PDqw public class SiteInfoBean { hKe30#:v T~>#2N-Z %%}A|, private String sSiteURL; //Site's URL ^gR+S private String sFilePath; //Saved File's Path ]qktj=p private String sFileName; //Saved File's Name l\Ftr_Dk private int nSplitter; //Count of Splited Downloading File Wd 2sh :d'
5O8 gR gog*z public SiteInfoBean() Px;Cg
6 {//nSplitter的缺省值为5 ;st\I //default value of nSplitter is 5 u?0d[mC this("","","",5); ]> G&jd7 } igkz2S I M7dU@ Ag z'MS#6|} public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ?b:_AO& { ?9KGnOVu sSiteURL= sURL; *e4TSqC| sFilePath = sPath; r/r:oXK sFileName = sName; O!F]^'! this.nSplitter = nSpiltter; *"9<TSU%m _%pAlo_6 ]T<^{jG } Dn;p4T@ >P(`MSc FjKq%.=# public String getSSiteURL() 1:NS}r+>3. { - r#K#v3 return sSiteURL; :L$4*8@`+ } ujzW|HW^v D3]BTkMMS; HD-Erop public void setSSiteURL(String value) XD%wj { 46XN3r sSiteURL = value; Z85|I.mr } La,QB3K/ <y=ovkM3 PZOKrW public String getSFilePath() a(x?fa[D { "4 k-dj return sFilePath; ?]!vRmZ; } ^Kq|ID
AP ^eh/HnJs HnZPw&* public void setSFilePath(String value) ^ddO&!U { !:
us!s sFilePath = value; 5K.+CO< } m_lrPY- Pl b1^cD6sT+ public String getSFileName() RU_L<Lpi { T9jw X:n return sFileName; TQ'E5^ } S@}4-\
*4yN3y 2$0)?ZC?= public void setSFileName(String value) l5J.A@0 { 8LrK94 sFileName = value; i0Pn Z
J } |B[eJq v59nw]' .W.;~`EW public int getNSplitter() }~I|t!GL { |*\C{b return nSplitter; '}{?AUDx } 0HibY[_PbD BQNp$]5s `,#!C`E 9 public void setNSplitter(int nCount) uHvaZMu { bZ5n,KQA5 nSplitter = nCount; MCy~@)-IN } 4rp6 C/i } 2P}bG>M U^$E'Q-VK %z)EO9vtr /* m|4LbWz **Utility.java Tg''1 Wl* */ jnBC;I[: package NetFox; 5~}!@yzc
nNR:cGfG 3M
N public class Utility { 8hB.fau 80&D"" " $)yB public Utility() lB:l)!]||= { Y5%;p33uFG }$aNOf%: ;`j U_ } e'~ Q@_D (%DRt4u<H //线程睡眠 =K'L|QKF public static void sleep(int nSecond) s[V`e2O { <\DUo0]J try{ GOr}/y; Thread.sleep(nSecond); VGJDqm! } _rjBc;a catch(Exception e) %b<%w
{ Zi1YZxF`Y e.printStackTrace (); AbY;H } a4by^ } SIv[9G6 <}2A=~
_ //日志 5$^c@ 0 public static void log(String sMsg) X;]3$\F { }td6fj_{ System.err.println(sMsg); fsI`DjKi) } .@K#U52 i./Y w 065A?KyD public static void log(int sMsg) cx:jUsb6 { rWe
8D/oc System.err.println(sMsg); 9::YR;NY } VjTAN= } "1%*'B^}bw c Vg$dt Q)dT(Td9~ /* %kW3hQ<$ **TestMethod.java ~UW{)]_jox */ Q9q9<J7j$ package NetFox; FB!z#Eim va+m9R0 >fwlg- public class TestMethod { /cY[at|p h7RD`k:mF P^;WB*V public TestMethod() S41)l!+2 { ///xx/weblogic60b2_win.exe f#c BQ~ try{ =U_@zDD@V SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); B>aEHb //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); !vrnoFVu SiteFileFetch fileFetch = new SiteFileFetch(bean); VY{,x;O` fileFetch.start(); nOr"K;C } -;S3| catch(Exception e){e.printStackTrace ();} F]SIT\kBm c8\g"T skSNzF7' } |{!Ns +' oHRbAE^ 8fEAYRGd public static void main(String[] args) c0hdLl;5 { JrxP,[qJG new TestMethod(); N$*>suQ, } 4SBLu%=s% } Qv=Bq{N 点击下载更多相关资料
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