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/* M#}k@
;L3 **SiteFileFetch.java "M}3T?0 O */ tS3!cO\ package NetFox; OE/r0C<& import java.io.*; +!/pzoWpE import java.net.*; BD2Gv)?g d1}cXSQ1T @Zzg^1Ilpu public class SiteFileFetch extends Thread { "Wg5eML0 -&h<t/U /lLG|aAe SiteInfoBean siteInfoBean = null; //文件信息Bean &SMM<^P. long[] nStartPos; //开始位置 7*eIs2aY long[] nEndPos; //结束位置 _ |G') 9 FileSplitterFetch[] fileSplitterFetch; //子线程对象 LS/ZZAN u long nFileLength; //文件长度 8a;;MJ) boolean bFirst = true; //是否第一次取文件 .R^q$U~v3 boolean bStop = false; //停止标志 t=IM"ZgfL File tmpFile; //文件下载的临时信息 0ZJrK\K; DataOutputStream output; //输出到文件的输出流 6m0-he~ 9Xe|*bT //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) af_bG; public SiteFileFetch(SiteInfoBean bean) throws IOException QfV:&b` { %Vb~}sT: siteInfoBean = bean; zP>=K //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); nNhb,J tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); 1`2lq~=GV if(tmpFile.exists ()) LG
vPy { _^h?JTU^ bFirst = false; wV q4DE read_nPos(); Y z],["*Q
} !JQ'~#jKN else chur(@Af
{ /6FPiASbS nStartPos = new long[bean.getNSplitter()]; X\|h:ce nEndPos = new long[bean.getNSplitter()]; .-:@+=( } _#yd0E vMYEP_lhK, T,uJO< @4wN-T+1 } ~}Z'/zCZf Zr|\T7w 3 E9Hyd #A public void run() 3J[ 5^ { `G2!{3UD //获得文件长度 \4|osZ0y //分割文件 vPsf{[Kr //实例FileSplitterFetch x8Nij:K# //启动FileSplitterFetch线程 w1)SuMFK_ //等待子线程返回 ;m}o$` try{ sDS0cc6e if(bFirst) 4EFP*7X { yb-/_{Y nFileLength = getFileSize(); 8 O.5ML{ if(nFileLength == -1) :Oc&{z?q { aFDCVm%U| System.err.println("File Length is not known!"); E#`JH } (h27SLYm else if(nFileLength == -2) <xAlp;8m5 { |dqvv System.err.println("File is not access!"); ~c'R7E&Bfa } [KsVI.gn else 7J$Yd976 { sX#7;,Ft7 for(int i=0;i<nStartPos.length;i++) l 5z8]/ { C<hb{$@ nStartPos = (long)(i*(nFileLength/nStartPos.length)); _R;+}1G/ } M5l*D'GE] for(int i=0;i<nEndPos.length-1;i++) Yd$64d7,h { !Nno@SP@ nEndPos = nStartPos[i+1]; uH8`ipX } UdX aC= Q nEndPos[nEndPos.length-1] = nFileLength; `*Jw[Bnh8 } E']Gh } i
,g<y 6|{uZNz ATf{;S} //启动子线程 W'<cAg? fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 0:k ~lz for(int i=0;i<nStartPos.length;i++) *,p16"Q; { f n'N^ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), }{@RO./)[ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), O:(%m nStartPos,nEndPos,i); QLAyX*%B Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); qYR+qSAJP fileSplitterFetch.start(); p$&6E\#7 } .@;,'Xw1~ // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), >jBnNA@ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); .X(ocs$} // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", da53XEF& nEndPos = " + nFileLength); ^p!bteA> // fileSplitterFetch[nPos.length-1].start(); LdY aJh~h /'0,cJnm -}r(75C //等待子线程结束 YK|Y^TU^ //int count = 0; sYY=MD
//是否结束while循环 /yj-^u\R boolean breakWhile = false;
js8\" =Pgu?WU@ i*%2 e) while(!bStop) 05m/iQ { 5s2334G write_nPos(); A[m4do Utility.sleep(500); IWcYa.=tZ breakWhile = true; #]5|Qhrr+ zwKm;;v8 )04lf*ti for(int i=0;i<nStartPos.length;i++) ^NTOZ0x~# { n"{oj7E0a if(!fileSplitterFetch.bDownOver) `;R|SyrX { _[W`!#" breakWhile = false; ^R4eW|H break; g$*VA} s } R4|<Vp<U2 } ^ok;<fJ if(breakWhile) lYu1m break; cnOk l@om2|B 3f:I<S7 //count++; %.R_[.W //if(count>4) @kKmkVhu* // siteStop(); p=(;WnsK } uOrvmb N+PW,a 41TB System.err.println("文件下载结束!"); -$4%@Z } ^"%SHs catch(Exception e){e.printStackTrace ();} 5Ffz^;i } 97Qng*i ~R cd QWf)5S //获得文件长度 aM9St!i public long getFileSize() `B6{y9J6 { 8P!dk5,,O int nFileLength = -1; !DCJ2h%E[_ try{ b~b(Ed{r URL url = new URL(siteInfoBean.getSSiteURL()); O`dob&C HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); :u{0M& httpConnection.setRequestProperty("User-Agent","NetFox"); zux+ooU 8y!fqXm%) GD'C^\EaZ int responseCode=httpConnection.getResponseCode(); .VmI4V?}h if(responseCode>=400) ZjEO$ts=@ { Md
{,@ G processErrorCode(responseCode); G6eC.vU]j return -2; //-2 represent access is error xM;gF2 }
jl2nRo )
ZOmv S_:(I^ String sHeader; q'2PG@ ooIMN = >UJ&noUD#: for(int i=1;;i++) %i%Xi+{3 { ?/)5U}*M0T //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); =O)JPo&iwY //Utility.log(in.readLine()); ok\+$+$ju sHeader=httpConnection.getHeaderFieldKey(i); GKY:"q&h if(sHeader!=null) _u;^w}0 { #fGb M!3p if(sHeader.equals("Content-Length")) 9rao&\eH { Ai->,<Ig] nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); ;^DUtr
; break; W'XMC" } |-_5ouN. } 45j+n.9=
else (4 {49b break; U&3*c+B4 } !icpfxOpjQ } RC (v#G catch(IOException e){e.printStackTrace ();} Ti3BlWQH catch(Exception e){e.printStackTrace ();} {u.V8%8 0uU%jN$ kM3BP&
3m1 Utility.log(nFileLength); MmWJYF= g-p
OO/| SC2C%.%l` return nFileLength; qqzQKN } t48(GKF {C]M]b*F6( 4rM77Uw> //保存下载信息(文件指针位置) 1wc
-v@E private void write_nPos() -'PpY302 { 6eDIS|/ try{ GYO\l.%V5y output = new DataOutputStream(new FileOutputStream(tmpFile)); 4E
|6l output.writeInt(nStartPos.length); iY|YEi8 for(int i=0;i<nStartPos.length;i++)
GoEIY { fSqbGoIQ // output.writeLong(nPos); 3Gp4%UT& output.writeLong(fileSplitterFetch.nStartPos); w ^<Y5K output.writeLong(fileSplitterFetch.nEndPos); )i_FU~ LRq } INbjk;k output.close(); J82{PfQ" } ~2H7_+.# catch(IOException e){e.printStackTrace ();} Jl]]nOBQ/ catch(Exception e){e.printStackTrace ();} xD\Km>|i } Q"hI !PO+ [V)sCAW 5GJ0E Z'X //读取保存的下载信息(文件指针位置) ;2@sn+@ private void read_nPos() "]_|c\98 { -/gS s<" try{ mzT} C&hfP DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); +cV!=gDT int nCount = input.readInt(); (J$A nStartPos = new long[nCount]; K<]fElh- nEndPos = new long[nCount]; T![K
i for(int i=0;i<nStartPos.length;i++) HJJ^pk& { xu:m~8% nStartPos = input.readLong(); g
Go nEndPos = input.readLong(); rp'fli?0e } 4{vd6T}V! input.close(); \PLV]%3, } <;6]) catch(IOException e){e.printStackTrace ();} b<F 4_WF catch(Exception e){e.printStackTrace ();} bf74 " } :T\WYKX3C QhGg^h%6 GwW#Ww;Oc private void processErrorCode(int nErrorCode) kQ#eWk J, { *c AoE l System.err.println("Error Code : " + nErrorCode); `>sqP aD } DYWC]* 4iLU "~ ]JD$fS=_ //停止文件下载 R&4E7wrdP public void siteStop() uf;q/Wr { Vd?v"2S(9 bStop = true; m_(hCY=Q$ for(int i=0;i<nStartPos.length;i++) i52R,hz fileSplitterFetch.splitterStop();
yX-xVvlv@ s^oNQ} ^z^>]Qd } r/4]b]n } |?|
u-y //负责部分文件的抓取 Oq2H>eW`f **FileSplitterFetch.java Iv<9})2K */ z;/'OJ[. package NetFox; *SY4lqN J7\q#] ? mN eW|3a import java.io.*; x>J3tp$2 import java.net.*; ~d8>#v=Q` *(`.h\+ 9/$P_Q:3 public class FileSplitterFetch extends Thread { zOE6;c81 {6n \532@ ^97ZH)Ww String sURL; //File URL 2Y4&Sba^Y long nStartPos; //File Snippet Start Position 3EZw F long nEndPos; //File Snippet End Position 6J
5)4^bk int nThreadID; //Thread's ID [;=ky<K0E boolean bDownOver = false; //Downing is over cLU*Tx\ boolean bStop = false; //Stop identical Q$vr`yV#=6 FileAccessI fileAccessI = null; //File Access interface 9(l'xu X =_dd4`G&< cP2R24th public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException &JlR70gdHi { d*>k
]X@G this.sURL = sURL; JKT+ q*V this.nStartPos = nStart; ,j nRt%W this.nEndPos = nEnd; 3kQ ^f=Wd nThreadID = id; >slN:dr0: fileAccessI = new FileAccessI(sName,nStartPos);//定位 gk z#kiGF } LgNNtZ&F 4:@|q:DR B<XPu=| public void run() 3b3cNYP { N1!5J(V4 while(nStartPos < nEndPos && !bStop) Z]S0AB.Z@ { E`4=C@NN+, jp^WsHI3 _;q-+"6L; try{ `fkrik URL url = new URL(sURL); ?03Zy3/ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 2jZ}VCzRG httpConnection.setRequestProperty("User-Agent","NetFox"); 48g^~{T4O String sProperty = "bytes="+nStartPos+"-"; 3=l-jGJk httpConnection.setRequestProperty("RANGE",sProperty); B%@!\D# Utility.log(sProperty); ]2%P``Yj +7/*y}.U `Y\/US70{c InputStream input = httpConnection.getInputStream(); (<C%5xk //logResponseHead(httpConnection); |2<f<k/UT _~nex,;r -NPkN%h byte[] b = new byte[1024]; W>s'4C` int nRead; dO4#BDn"= while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop)
CDYx/yO { &8AS=v nStartPos += fileAccessI.write(b,0,nRead); ba9<(0` //if(nThreadID == 1) O|&TL9: // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); WJU NJN } r)5\3j[P g**%J Xo 9H}iX0O Utility.log("Thread " + nThreadID + " is over!"); x\hn;i< bDownOver = true; x0A%kp&w //nPos = fileAccessI.write (b,0,nRead); ;vc lAsJ } :5K~/=6x catch(Exception e){e.printStackTrace ();} K}=8:BaUL } @*"<U] } T7,Gf({ Zc3:9 N"x\YHp //打印回应的头信息 +Q!xEfpO; public void logResponseHead(HttpURLConnection con) #Wm@&|U { 3zA=q[C for(int i=1;;i++) _{`'{u
{ d)GkXll1D String header=con.getHeaderFieldKey(i); 4fu\3A& if(header!=null) F}B/-".^ //responseHeaders.put(header,httpConnection.getHeaderField(header)); @j\?h$A/ Utility.log(header+" : "+con.getHeaderField(header)); fpK0MS]=b else LB*# break; mf;^b.mKh } `^bvj]>l } :
9?Cm` X\^& nLa p-yOiG8b} public void splitterStop() P$6f +{ { ?`
eYWZ"> bStop = true; rxgVT4 } >uchF8)e| 6KCCbg/ jRdhLs,M9 } W#Hv~1 gKs/T'PW a._^E/EV /* bDZKQ& **FileAccess.java fs3-rXoB *//文件访问(定位,写) L=$?q/=- package NetFox; nT@6g|! import java.io.*; 43u PH1
) -l40)^ E} /_:T\`5uO public class FileAccessI implements Serializable{ @O<@f8- #lyM+.T //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 K[#v(<) RandomAccessFile oSavedFile; Qw6KX#n long nPos; p-i.ITRS uzVG q!'H I_zk' public FileAccessI() throws IOException {+/
.5 { !rsa4t@t this("",0); |?2 hml } RI5g+Du? lC /Hib ET,0ux9F public FileAccessI(String sName,long nPos) throws IOException %Vw|5yA4 { BDm88<] oSavedFile = new RandomAccessFile(sName,"rw"); [V2omSZo this.nPos = nPos; ~E<PtDab oSavedFile.seek(nPos); GTp?)nh^ } ^EC)~HP@C `bZ2x@ :tjgg] public synchronized int write(byte[] b,int nStart,int nLen) 409x!d~it { _UH/}!nqB int n = -1;
d-ag try{ un$ Z7W/ oSavedFile.write(b,nStart,nLen); T1Gp$l n = nLen; GCP{Z]u } [xZ/ZWb/ catch(IOException e) C-a*EG { aDN6MZM e.printStackTrace (); 2,8/Cb } *l> [`U+ ;T5,T 6Q.{llO return n; wO2V%v^bp } r
1l/) ; l50|`
6t 08Pt(kzNA } -~vl+L RjR&D?dc C@TN5?Z /* {[M0y*^64$ **SiteInfoBean.java o~OwE7H)A */ '!j #X_; package NetFox; C=oM,[ESQ0 `2B*CMW{ QMXD9H0{ public class SiteInfoBean { DEUd[ ;mf4U85 [K/O5_ private String sSiteURL; //Site's URL NCowt|#t private String sFilePath; //Saved File's Path YVQ_tCC_! private String sFileName; //Saved File's Name la
G$v-r private int nSplitter; //Count of Splited Downloading File YBYB OH *3A3>Rwu dWsT Jyx~ public SiteInfoBean() E^Q@9C<!d {//nSplitter的缺省值为5 |eH wp //default value of nSplitter is 5 g9yaNelDh) this("","","",5); 0[n c7)sW } JCcN>DtP Hv8SYQ| 1fz*SIjG public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) -M7K8 { `ir&]jh.A sSiteURL= sURL; L#
`lQ"`K sFilePath = sPath; ,N;))3 sFileName = sName; 'i@,~[Z4 this.nSplitter = nSpiltter; >.DF"]XM +R|U4`12 k1ipvKxp:8 } {Oy9RESqc JP{UgcaF 5SoZ$,a<e public String getSSiteURL() NoFs-GGGh { dO>k5!ge|: return sSiteURL; <Vz<{W3t } i0k+l hnp`s%e, XXa(305 public void setSSiteURL(String value) a{<p'_ { >Y7r\ sSiteURL = value; ybo#K } YniZ(
~^K DRH'A!r! =?=)s public String getSFilePath() ^y:FjQC: { T?W[Z_D return sFilePath; u~" siH } UppBnw xj0cgK|! PV?]UUc'n< public void setSFilePath(String value) m! rwG( { F0@Qgk]\ sFilePath = value; @@'nit } uWUR3n 3LKB; CD^CUbGk public String getSFileName() c]6V"Bo}A { %4j&H!y-w; return sFileName; Wm<z?.lS } ;KZrl` cvKV95bn 1s Br.+p public void setSFileName(String value) D+f'*| { }0$mn)*k sFileName = value; vT?Q^PTO } .
3GnZR,L Q(lku"U' Yx6hA#7I public int getNSplitter()
RXBb:f { pJd 0k"{ return nSplitter;
\;-qdV_JB } ;SfNKu U);OR 6^Ph ' public void setNSplitter(int nCount) {]=v]O|, { Q4X7Iu: nSplitter = nCount; Xad*Iulj } HeCcF+ } XdcG0D^ x Y| yI> x;Gz6| /* +L0J_.5%^ **Utility.java 8)sg_JC */ 2A*/C7 package NetFox; G-arnu) !(Q l)C nB=0T`vQ public class Utility { Y[Es ~uB'3`x DR6]-j!FK public Utility() )%s +? { ):krJ+-/y R aefj(^V i|%5 } N<(HPE};
/KAlK5< //线程睡眠 ?yp0$r/ public static void sleep(int nSecond) _ENuwBYW- { Yj3 P 7k$c try{ Te;gVG * Thread.sleep(nSecond); :lK4
db } p'&*r2_ram catch(Exception e) :7\9xH { h4Ia>^@ e.printStackTrace (); B20_ig: } \OcMiuw } H>?F8R_iq 7IW> >RBF //日志 Y;,Hzmbs6w public static void log(String sMsg) l)Zs-V!M^\ { NY@"&p'Q System.err.println(sMsg); a}>Dz 1R } j5\$[-'; \X&
C4# u?kD)5Nk public static void log(int sMsg) !qA8Zky_ { |z~LzSJv System.err.println(sMsg); khAqYu") } NhA#bn9y? } noC?k }M ^YKy9zkTl Ziz=]D_ /* y? "@v. **TestMethod.java '&by3y5w-3 */ H0a-( package NetFox; =Y9\DeIZ pcH<gF(k 'S?;J ,/ public class TestMethod { J{Tq%\a3 Zhzy.u/> ,GrB'N{8e public TestMethod() cx^{/U?9} { ///xx/weblogic60b2_win.exe `U{mbw, try{ BDe]18X SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); #dc1pfL!y{ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); JDv-O&] SiteFileFetch fileFetch = new SiteFileFetch(bean); B,_`btJh fileFetch.start(); ''S&e } -#?<05/C> catch(Exception e){e.printStackTrace ();} qzK("d xQu
eE{ /APcL5:= } aI(>]sWJ ,+._;[k 5j eO"jB public static void main(String[] args) ]` ]g@v { =Ikg.jYq&F new TestMethod(); kq-6HDR } Km3&N } DA"}A`HfI 点击下载更多相关资料
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