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/* N:[22`NP **SiteFileFetch.java ^p?O1qTg */ </3Shq package NetFox; ]([:"j import java.io.*; dh#4/Wa, import java.net.*; rLw3\>y n7>CK?25 j'Z};3y public class SiteFileFetch extends Thread { eLXG _Qb" .{%~4$yu7 X YO09#>& SiteInfoBean siteInfoBean = null; //文件信息Bean &^KmfT5C long[] nStartPos; //开始位置 0*o)k6?q3 long[] nEndPos; //结束位置 484lB}H FileSplitterFetch[] fileSplitterFetch; //子线程对象 gswp:82e2 long nFileLength; //文件长度 ~( 54-9& boolean bFirst = true; //是否第一次取文件 J*?BwmD'8 boolean bStop = false; //停止标志 @AYO )Y8 File tmpFile; //文件下载的临时信息 ?&W1lYY DataOutputStream output; //输出到文件的输出流 c%%r xs_l+/cZ //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) zA4m !l*eM public SiteFileFetch(SiteInfoBean bean) throws IOException BQq,,i8H { bU9B2'%E siteInfoBean = bean; t2d_XQOK //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); /^v?Q9=Y tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); #-?pY"N, if(tmpFile.exists ()) )xYv$6= { m22M[L(q bFirst = false; 28J
;9 read_nPos(); *&]x-p1m } bI/d(Q%#< else H7bdL 8/ { iTJSW nStartPos = new long[bean.getNSplitter()]; t>p!qKrE'J nEndPos = new long[bean.getNSplitter()]; g"gh2#!D } iLiEh2%P ,&[2z! '#K:e o%_MTCANy } 9|#YKO\\i 1~/?W^ir {a-bew public void run() lIPy)25~ { Sp8Xka~5*# //获得文件长度
d1$3~Xl] //分割文件 fZ!fwg$ //实例FileSplitterFetch VU6nu4 //启动FileSplitterFetch线程 ^c",!Lp}{ //等待子线程返回 cz<8Kb/XV try{ dXR70/ if(bFirst) GjlA\R^e { P[{qp8(g nFileLength = getFileSize(); ns`|G;1vv if(nFileLength == -1) oo sbf#V { _):V7Zv System.err.println("File Length is not known!"); Pl(+&k`} } n46A else if(nFileLength == -2) 8;2UP`8s ? { am;)@<8~Q System.err.println("File is not access!"); %%J)@k^vH } pMZKF = else ^~~&[wY { Z@ AHe`A for(int i=0;i<nStartPos.length;i++) I`Goc!5t
{ ^3B)i= nStartPos = (long)(i*(nFileLength/nStartPos.length)); &<8Q/m]5 } F^&
Rg for(int i=0;i<nEndPos.length-1;i++) <X9 T}g { {.c(Sw}Eo nEndPos = nStartPos[i+1]; |^&n\vXv } <-KHy`u nEndPos[nEndPos.length-1] = nFileLength; ,'[&" Eg } Sj?u^L8es} } `tZu~
n za{z2#aJ Us4J[MW< //启动子线程 LB*qL fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; V
mxVE=l for(int i=0;i<nStartPos.length;i++) h!# (. P { wcGI2aflD fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ).aQ}Gwx^ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), h_Ky2IB$ nStartPos,nEndPos,i); Uawf,57v< Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 3k)W0]:|< fileSplitterFetch.start(); zO#{qF+~; } 0 5eth // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), Q(@/,%EF siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); _-/aMfyQ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", yU*upQ nEndPos = " + nFileLength); C'8v\C9Ag // fileSplitterFetch[nPos.length-1].start(); Kjbt1n eZDqW)x ="E^9! //等待子线程结束 3I!xa*u //int count = 0; cI}qMc //是否结束while循环 W_k;jy_{9 boolean breakWhile = false; 4.]xK2sW 566vjE m\a_0!K while(!bStop) HU[a b { \~V
ZY write_nPos(); RiHOX&-7 Utility.sleep(500); 4dy2m! breakWhile = true; a^yBtb~,P |Z%I3-z_DS Xk#"rM< Y for(int i=0;i<nStartPos.length;i++) 7P3PQ%: { dD6I @N)X if(!fileSplitterFetch.bDownOver) _isqk~ ul { TMt,\gTd breakWhile = false; Nxk3uF^ break; zJ;K4)"j } HQi57QB } 97"dOi!Wh if(breakWhile) =+um:*a. break; gucd]VH VAkZ@
u3'~ u`E24~ //count++; eL)*
K> T //if(count>4) BcJ]bIbKb // siteStop(); vfID@g`!q+ } QuuR_Ao?c' |ocIp/$ $HjKELoJ< System.err.println("文件下载结束!"); ?Y6MC:l< } CPRv"T;? catch(Exception e){e.printStackTrace ();} ,:yv T6)p } emZ^d/A En@] xvE 1rhsmcE //获得文件长度 /4 zO public long getFileSize() j.C)KwelBS { *2MM int nFileLength = -1; e&&;"^@- try{ Q_}i8p' URL url = new URL(siteInfoBean.getSSiteURL()); cG%ttfq\ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); eF8!}|*N httpConnection.setRequestProperty("User-Agent","NetFox"); )9_jr(s uQy5t:! %9.]
bd|%F int responseCode=httpConnection.getResponseCode(); tCnx:1 if(responseCode>=400) h&|wqna { -w41Bvz0 processErrorCode(responseCode); o`^GUY} return -2; //-2 represent access is error H^jFvAI,8 } (s?`*i:2 ?h`Ned0P ] iKFEd String sHeader; BKoc;20; 1FfdW>ay* /m,0H)w1 for(int i=1;;i++) _!FM^N}| { TmS;ybsG //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); aQax85 //Utility.log(in.readLine()); p%304oP6 sHeader=httpConnection.getHeaderFieldKey(i); zGz^T if(sHeader!=null) J"w!Q\_ { ]h (TZu if(sHeader.equals("Content-Length")) jRz2l`~7# { =~r?(u6d nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); p'afCX@J break; 5ug?'TOj' } Q(lj&!?1k } |_l\. else >V~q`htth break; }g WSV }
&y1' J } ?p{xt$<p catch(IOException e){e.printStackTrace ();} \jn[kQ+pJ catch(Exception e){e.printStackTrace ();} &fBLPF% 6 %gd=d0vm %
'>S9Ja3 Utility.log(nFileLength); !O$ */7 7I;Give{ 66\0JsT?3 return nFileLength; #8;|_RU } {8M=[4_`l s{q)m@ { .KCK_ d //保存下载信息(文件指针位置) 4)=LOGW private void write_nPos() &]~z-0`$! { @+",f] try{ `Rj<qz^7 output = new DataOutputStream(new FileOutputStream(tmpFile)); 3j.Ft*SV output.writeInt(nStartPos.length); Xu#\CYk for(int i=0;i<nStartPos.length;i++) gF%lwq { ~p~8T // output.writeLong(nPos); ]B>Y
+ output.writeLong(fileSplitterFetch.nStartPos); b?-%Uzp< output.writeLong(fileSplitterFetch.nEndPos); 5YIiO7@4 } s-r$%9o5 output.close(); &Pt| } EWN$ILdD catch(IOException e){e.printStackTrace ();} e ,zR catch(Exception e){e.printStackTrace ();} rtDm<aUh } p}.P^`~j 8?W!U*0aS k]x64hgm //读取保存的下载信息(文件指针位置) ~BCSm]j private void read_nPos() ~\hA-l36 { k%QhF] try{ @Z!leyam DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); zQxZR}' int nCount = input.readInt(); AO;`k]0e nStartPos = new long[nCount]; +-,Q>` nEndPos = new long[nCount]; 9>psQ0IRvr for(int i=0;i<nStartPos.length;i++) 9QJ=?bIC# { b@N|sXt&C nStartPos = input.readLong(); !-r@_tn| nEndPos = input.readLong(); mLD0Lu_Ob3 } +3vK=d_Va input.close(); ?[Q;275 } EF0{o_ catch(IOException e){e.printStackTrace ();} ) 0$7{3 catch(Exception e){e.printStackTrace ();} ,oDZ:";
} g'Ft5fQ"o/ }Evy fc#D 2uw%0r3Vi6 private void processErrorCode(int nErrorCode) _6qf>=qQ`" { %Ua*}C System.err.println("Error Code : " + nErrorCode); p<'mc|hGq } g=pz&cz;>\ -]5dD VSO uW4G!Kw28 //停止文件下载 z>k6 T4( public void siteStop() H7"I+qE-G { 133lIX+(k bStop = true; 5<4njo?k for(int i=0;i<nStartPos.length;i++) N!;Y;<Ro_ fileSplitterFetch.splitterStop(); E?z 3&C 6fPuTQ}fY> e`R*6^e } .x6*9z#q } %xLziF //负责部分文件的抓取 +d\"n **FileSplitterFetch.java ({![ */ *we 3i package NetFox; =0,")aa! Rjo6Pd{d< Du$kDCU import java.io.*; bEbO){Fe import java.net.*; @Sub.z&T{ ]*juF[r( 4_PMl6qo public class FileSplitterFetch extends Thread { D8h?s }<FBcc(n S7wZCQe String sURL; //File URL D.qbzJz long nStartPos; //File Snippet Start Position {_3ZKD(\ long nEndPos; //File Snippet End Position uVDB;6 int nThreadID; //Thread's ID
30FYq? boolean bDownOver = false; //Downing is over lZ^XZjwoM boolean bStop = false; //Stop identical 2K,
1wqf' FileAccessI fileAccessI = null; //File Access interface [$.oyjd nUmA ErB6fl public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException {>QrI4*A { /RmLV this.sURL = sURL; fLc<}DF this.nStartPos = nStart; nT|fDD| this.nEndPos = nEnd; JS&l
h nThreadID = id; S?hM fileAccessI = new FileAccessI(sName,nStartPos);//定位 R9S7p)B } 0g]ABzTn lDp5aT;DsM Fxv~;o# public void run() @Z@yI2#e { !SiZA" while(nStartPos < nEndPos && !bStop) <6p{eGAQV { rVQ:7\=Z u9mMkzgSkP sF_.9G)S0 try{ "TtK!>!. URL url = new URL(sURL); yuFuYo&[?v HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ?ZlwRjB\ httpConnection.setRequestProperty("User-Agent","NetFox"); P;hjr; String sProperty = "bytes="+nStartPos+"-"; 3m7$$N| httpConnection.setRequestProperty("RANGE",sProperty); _sZ/tU@_-K Utility.log(sProperty); F1Egcx/$V t47 f$gq uT]_pKm InputStream input = httpConnection.getInputStream(); 5?9}^s4 //logResponseHead(httpConnection); Vl^jTX5N 5I T'u3V [p4a\Qg0 byte[] b = new byte[1024]; }qV4]*+{ int nRead; o>U%3-+T^J while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) w^R5/#F_r { s_`wLQ7e nStartPos += fileAccessI.write(b,0,nRead); 7jts;H= //if(nThreadID == 1) An]*J|nFIY // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); W'gCFX } 6EX:qp^` cty~dzX^ 9Od
Kh\F ( Utility.log("Thread " + nThreadID + " is over!"); f=/ S]o4/3 bDownOver = true; (nBJ,v) //nPos = fileAccessI.write (b,0,nRead); IeN!nK- } ?_<ZCH catch(Exception e){e.printStackTrace ();} :Oq!.uO } B TcxBh } ~&B_ Bswf j nI)n* C6'[ Tn //打印回应的头信息 #"i}wS public void logResponseHead(HttpURLConnection con) -fUz$Df/R { 0pkU1t~9 for(int i=1;;i++) Mv4JF(,S { Qt>yRt String header=con.getHeaderFieldKey(i); dqF--)Nb if(header!=null) 1f[!=p //responseHeaders.put(header,httpConnection.getHeaderField(header)); ;=h^"et Utility.log(header+" : "+con.getHeaderField(header)); HLk}E*.mC else iy$]9Wf6=@ break; P7u5Ykc* } q%>L/KJ# } !7%L%~z^ k(VA5upCs aN;L5;m#>{ public void splitterStop() ZV;#ZXch { 7;|6g8= bStop = true; #XJYkaL } !xe<@$ C=PBF\RkKu zKiKda%) } {Qw,L;R IUu[`\b= qQpR gzw /* $)7-wCl</ **FileAccess.java p(0!TCBs *//文件访问(定位,写) (''`Ce package NetFox; yRieGf1'SD import java.io.*; B*D`KA ,C=Fgxw( \n<N>j@3 public class FileAccessI implements Serializable{ IK%j+UB H%faRUonz //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 uv_*E`pN~ RandomAccessFile oSavedFile; ~=0zZTG long nPos; 4|++0=#D$ /5yWvra N{Is2Ia public FileAccessI() throws IOException zyCl`r[} { .4-; this("",0); ;AG5WPI } CH9#<?l 7qzI] fep#Kb%"e public FileAccessI(String sName,long nPos) throws IOException U8<GD| { &NGlkn oSavedFile = new RandomAccessFile(sName,"rw"); @.CPZT this.nPos = nPos; 5%4:)s{4| oSavedFile.seek(nPos); =euoSH
D} } Sl 6}5 u[d8)+VX
]MB^0:F- public synchronized int write(byte[] b,int nStart,int nLen) pazFVzT { y!aq}YS int n = -1; ]Ff&zBJ try{ WfO6Fvx% oSavedFile.write(b,nStart,nLen); t~@TUTbx n = nLen; .`,YUr$. } %? RX}37K catch(IOException e) 0kC!v, { Sm,%> e.printStackTrace (); ,GR(y^S } C= hE@ M:C*?;K: @p`#y return n; [
8v)\lu } -4hX- /"/$1F%{ ]@WJ&e/'@ } :5"|iRP' im1]:kr7 I{1w8m4O6 /* g~Q#U;] **SiteInfoBean.java pu `|HaQaE */ O[`n{Vl/ package NetFox; y f+/Kj<
a ]Fjz+CGg 9"<)DS public class SiteInfoBean { <'B`b C{Npipd}v tk,
HvE private String sSiteURL; //Site's URL 0Y"==g+>f private String sFilePath; //Saved File's Path vEfX'gyk private String sFileName; //Saved File's Name RHB>svT^K> private int nSplitter; //Count of Splited Downloading File cQ+V4cW
Z WJJ!NoP !_V*VD public SiteInfoBean() ICV67(Ui {//nSplitter的缺省值为5 ZC0F:=/K //default value of nSplitter is 5 d~[>%& this("","","",5); JQbI^ef_; } m0\(a_0V v3aiX Vwv O@G7A public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) :.sK:W("v { t/q\Ne\\, sSiteURL= sURL; }b,a*4pN sFilePath = sPath; >xH3*0Lp sFileName = sName; Grw_SVa^ this.nSplitter = nSpiltter; ;GE0iSC L@[bgN`=v +%>L;'L
^X } ][_:{ N/ $1UN?(r w1s#8: public String getSSiteURL() ?|8H$1 { :Eob"WH return sSiteURL; 2Jj`7VH> } N*o+m~:y &O!d!Pf u,'c:RMV public void setSSiteURL(String value) flmcY7ZV { TYLf..i< sSiteURL = value; orL7y&w(v: } wBmbn=>#S ExnszFX* vmmu[v public String getSFilePath() Wje7fv { l sUQ7%f return sFilePath; ^&Qaf:M } {O!fV<Vx 9 Cf%)W:Q9 oXz:zoNQ public void setSFilePath(String value) =zbrXtp, { X|.X4fs sFilePath = value; /+66y=`UJ } BKJW\gS2 2U#OBvNU @c.QrKSaD public String getSFileName() Xv'64Nc!; { tc#
rL return sFileName; r4_ c~\jH } ~%GUc
~ U>:p`@ w#"c5w~ public void setSFileName(String value) [%3{mAd { G.(9I~! sFileName = value; i2swots } h3JIiwv0! r2H]n.MT eJ?SLMLY public int getNSplitter() 9]kWM]B)o { )DoY*'Cl return nSplitter; /j.V0% } ?{^T&<18t ."=Bx2 BfhOe~+i public void setNSplitter(int nCount) Ak4iG2 { tp0^%!*9 nSplitter = nCount; qKWkgackP } {zg}KiNDZd } \)LY_D: iaPY>EP1 6idYz"P % /* EV~_-YC
**Utility.java WlG/7$ */ Zb}=?fcL;@ package NetFox; n1!u
aUC Yz{UP)TC
R=PjLH&) public class Utility { y+X%qTB AMtFOXx%I 33
N5> } public Utility() {L.0jAwB { HW{+THNj BeP0lZ <4Ujk8Zj } KqB(W,$ rsiG]o=8 //线程睡眠 Ee4oTU5Mb public static void sleep(int nSecond) od-N7lp# { ~sk 4v:- try{ ];(w8l Thread.sleep(nSecond); 03{e[#6 } <tFq6| catch(Exception e) A"w
1GBx { q
\0>SG e.printStackTrace (); Hh;7 hY\ } ucB< } g3"`b)M Y$%Ze]~ //日志 4xg%OH public static void log(String sMsg) _.\p^ HM { j63w(Jv/ System.err.println(sMsg); <51 (q_f } V=1Y&y ^bS&[+9E My=p>{s public static void log(int sMsg) 3O$Q>.0 w/ { l$.C40v System.err.println(sMsg); .PxtcC.K } n802!d+Tn } }JvyjE /z~;.jRg <BT}Tv9 /* #O `nQ **TestMethod.java b+3{ bE */ P>jlFm package NetFox; "TG}aS ar>S_VW* g6r3V.X' public class TestMethod { 8'/vW ~f K]Ed-Tz8QZ YHg4WW$ public TestMethod() C#vU'RNpl { ///xx/weblogic60b2_win.exe kg9ZSkJr try{ |P~TZ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); XCQ=`3f //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); LLV:E{`p SiteFileFetch fileFetch = new SiteFileFetch(bean); <C]s\"o-` fileFetch.start(); -pyTzC$HO } ~?S/0]?c catch(Exception e){e.printStackTrace ();} i!sKL%z} 7e>n{rl M%yT?R+ } :C>slxY D0tI 1^Ci$ra public static void main(String[] args) E3sl"d;~ { X_O(j!h new TestMethod(); &5c)qap;n } WVp14Z?k } Tig`4d-% 点击下载更多相关资料
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