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/* x']'ODs **SiteFileFetch.java ?'P}ZC8P */ <r:AJ; package NetFox; J;obh.}u"{ import java.io.*; dW4jkjap import java.net.*; wUCxa>h' q5R|
^uf }?9&xVh?\ public class SiteFileFetch extends Thread { +v;z^+ ;WSW&2 &t9V SiteInfoBean siteInfoBean = null; //文件信息Bean =p'+kS+ long[] nStartPos; //开始位置 JnsJ]_< long[] nEndPos; //结束位置 r+Ki`HD% FileSplitterFetch[] fileSplitterFetch; //子线程对象 6"Fn$ :l? long nFileLength; //文件长度 t>cGfA boolean bFirst = true; //是否第一次取文件 :Mu*E5 boolean bStop = false; //停止标志 swF{}S" File tmpFile; //文件下载的临时信息 t6nRg DataOutputStream output; //输出到文件的输出流 P'U2hCif @ye!? % //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Io.RT+slB public SiteFileFetch(SiteInfoBean bean) throws IOException }aRib{L { ^MvuFA,C siteInfoBean = bean; AVpg //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); \Vf:/9^ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); g&FTX>wX if(tmpFile.exists ()) g.Xk6"kO { %)r ~GCd bFirst = false; r+FEgSDa] read_nPos(); Gc|)4c } mtv8Bm=< else @[3c1B6K { S\TXx79PhC nStartPos = new long[bean.getNSplitter()]; U0_^6zd_ nEndPos = new long[bean.getNSplitter()]; =D/zC'l } T-%=tY+- Eu?z! tVn?cS R7bG!1SHl } Q6Gw!!Z5EA
*V6|
FU 7s(tAbPdB public void run() EraGG"+ { f4f2xe7\Q //获得文件长度 |ri)-Bk
, //分割文件 X 0y$xC|< //实例FileSplitterFetch F^O83[S //启动FileSplitterFetch线程 jfuHZ^ YA //等待子线程返回 8?+|4:#=*J try{ GDxv2^4 if(bFirst) IO+]^nY` { $,4h\>1WP nFileLength = getFileSize(); P"w\hF if(nFileLength == -1) L|'^P3#7` { )dT@0Ys% System.err.println("File Length is not known!"); CFaY= Cy } 3$\k=q3`# else if(nFileLength == -2) KrE'M { USBQEt System.err.println("File is not access!"); t7+A!7b{ } .9jKD*U| else A'|!O:s
{ 5f-b>=02 for(int i=0;i<nStartPos.length;i++) >d/H4;8 { L)sgW(@2 nStartPos = (long)(i*(nFileLength/nStartPos.length)); HxG8'G } k +-w% for(int i=0;i<nEndPos.length-1;i++) {a7~P0$ { bNea5u## nEndPos = nStartPos[i+1]; >@YefNX6 } _wq?Pa<)e nEndPos[nEndPos.length-1] = nFileLength; JWn26, } AcH-TIgM/ } 7zM:z, }s}g}t8v- $T'!??|IF //启动子线程 >fPo_@O fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; qkb'@f= for(int i=0;i<nStartPos.length;i++) g68p9#G { 2B,O/3y fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ^#/FkEt7bp siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), AJPvwu}D nStartPos,nEndPos,i); P6:C/B Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); )kD/ 8 fileSplitterFetch.start(); ^jdU4 } ;5[KZ8j6Y // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), @YJI'Hf67 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); !|cg= // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", oo5=5s6 3} nEndPos = " + nFileLength); Fhoyji4 // fileSplitterFetch[nPos.length-1].start(); zKJ2~= =&HLz
7| tdy2ZPVtTV //等待子线程结束 jwZ,_CK //int count = 0; *ukyQZ9 //是否结束while循环 r~4uIUE{ boolean breakWhile = false; 0'QWa{dS\ \CbJU IPiV_c-l while(!bStop) }lJ;|kx$
{ W yL+HB} write_nPos(); )9QtnM Utility.sleep(500); {z#2gc'Q breakWhile = true; WjV15\, !rvEo =^ mgs(n5V5 for(int i=0;i<nStartPos.length;i++) x(_[D08/TT { 0#q=-M/?` if(!fileSplitterFetch.bDownOver) N##` { bDI%}k9# breakWhile = false; 6cQgp]% break; okNo-\Dh! } G0cG%sIl } ;JW_4;- if(breakWhile) .])prp8 break; NFK`, eI
#Gx_mg APQq F/ //count++; 6b|?@ //if(count>4) 8)i""OD@I // siteStop(); g?C;b>4 } bF)G+IH s27IeF3 hsZ/Vnn` System.err.println("文件下载结束!");
H}@:Bri } gEA SYIQ catch(Exception e){e.printStackTrace ();} =bVPHrKNQ } >@ t C@rGa7 R%E7 |NAG //获得文件长度 bS.w<V
Ew public long getFileSize() DSGcxM+ { YIU3}sJ! int nFileLength = -1; d_RgKdR )k try{ >t D=t8 URL url = new URL(siteInfoBean.getSSiteURL()); aQkOQy HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); |@qw httpConnection.setRequestProperty("User-Agent","NetFox"); 3r\8v`^> [,%=\%5 l6viP}R int responseCode=httpConnection.getResponseCode(); 8xpplo8 if(responseCode>=400) i;[y!U { 0}{xH processErrorCode(responseCode); p7h#.m~Qu return -2; //-2 represent access is error lOIk$"Ne } I7f ^2 D$>_W ,*V H'+7z-%G String sHeader; {4"V)9o-1> 9g9 2eKS 2wf&jGHs for(int i=1;;i++) u8e_Lqx? { jm_-f //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); )P$(]{ //Utility.log(in.readLine()); 3} A$+PX sHeader=httpConnection.getHeaderFieldKey(i); /
)0hsQs if(sHeader!=null) w =^.ICyb@ { UZZJtQt if(sHeader.equals("Content-Length")) <hT\xBb: { ^;C& nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); g 7oY 1; break;
%H{p&ms } |HazM9= } 1uF$$E6[ else >1y6DC break; EM,C } ]@q%dsz } en<mm#Ab catch(IOException e){e.printStackTrace ();} Lu.zc='\ catch(Exception e){e.printStackTrace ();} UHBXq;?&q K^-1M? zF&VzNR2 Utility.log(nFileLength); GW2\YU^{ yMs!6c* S0$^|/Sr return nFileLength; UD I{4+z } }r}*=;Ea 8^mE< |rm elQ- //保存下载信息(文件指针位置) 4=PjS<Lu8 private void write_nPos() jU,Xlgz(A { 3f;=#|l try{ <,d550GSm output = new DataOutputStream(new FileOutputStream(tmpFile)); 37AVk`a output.writeInt(nStartPos.length); 5>532X(0 for(int i=0;i<nStartPos.length;i++) j;x()iZ< { ez4!5&TzRm // output.writeLong(nPos); L"_XWno output.writeLong(fileSplitterFetch.nStartPos); J0G@]H output.writeLong(fileSplitterFetch.nEndPos); "> uN={Iy } Aoa8Q
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output.close(); H`EhsYYK } gY}In+S catch(IOException e){e.printStackTrace ();} Hxu5Dx5![ catch(Exception e){e.printStackTrace ();} >A#5` $i } _0/unJl` Dc9uq5l k.@![w\ea //读取保存的下载信息(文件指针位置) Z9{~t private void read_nPos() Hq@+m! { !oLn= try{ sJHVnMA DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 4WT[( int nCount = input.readInt(); ZR.k' nStartPos = new long[nCount]; !\4x{Wa] nEndPos = new long[nCount]; "hkcN+= for(int i=0;i<nStartPos.length;i++) g` rr3jP { =]5tYIU nStartPos = input.readLong(); T:}Q3 nEndPos = input.readLong(); ~o}:!y } PK\Z Rl input.close(); \ovs[& } f}otIf
catch(IOException e){e.printStackTrace ();} a[{$4JpK catch(Exception e){e.printStackTrace ();} 3i^X9[. } F%>$WN#2 bzN[*X| 5#Er& 6s private void processErrorCode(int nErrorCode) )ycI.[C { ;?h[WIy System.err.println("Error Code : " + nErrorCode); L G}{ibB } kR]P/4r *_V+K rYUIFPN //停止文件下载 $H:!3-/ public void siteStop() Szo'[/
[R { 2a d|v] bStop = true; ">V&{a-C4 for(int i=0;i<nStartPos.length;i++) (*-wiL fileSplitterFetch.splitterStop(); /ViY:-8s J,W<ha* +{UY9_~\3 } "ubp`7%67 } #~0Nk6*u //负责部分文件的抓取 J}|X **FileSplitterFetch.java /$^Tou/v */ :X>Wd+lY:_ package NetFox; Q_mphW:[ -jH|L{Iyq} dPUe5k)G_ import java.io.*; 1M ?BSH{ import java.net.*; Rv1W &s&
Y@,iDQ
a~}q]o?j public class FileSplitterFetch extends Thread { $4bc! 7FX4|] >?g@Nt8 String sURL; //File URL 1?@HOu long nStartPos; //File Snippet Start Position /9vi long nEndPos; //File Snippet End Position AXyXK?? int nThreadID; //Thread's ID B,b8\\^k| boolean bDownOver = false; //Downing is over "Eh=@?]S_ boolean bStop = false; //Stop identical ax@H^Gj@2 FileAccessI fileAccessI = null; //File Access interface mhbczVw >oh Cz@~ 41
F;X{Br public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException N8A)lYT]_u { )JMqC+J3*t this.sURL = sURL; k4+vI1Cs this.nStartPos = nStart; ~IhAO}1 this.nEndPos = nEnd; 9a`LrB nThreadID = id; R hWQ:l] fileAccessI = new FileAccessI(sName,nStartPos);//定位 YRZ\nun } GDu^P+^ }[0nTd qqDg2,Yb public void run() Z\
hcK: { )O'LE&kQ| while(nStartPos < nEndPos && !bStop) {f06Ki { Gxr\a2Z&r% I0XJ&P% ;m7V]h? R try{ >$q URL url = new URL(sURL); :a wt7lqv HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 4v[y^P httpConnection.setRequestProperty("User-Agent","NetFox"); _i_='dsyW/ String sProperty = "bytes="+nStartPos+"-"; s'HsLe0| httpConnection.setRequestProperty("RANGE",sProperty); @9/I^Zk Utility.log(sProperty); PV68d; $:8 .}faWzRH9 b{0a/&&1O InputStream input = httpConnection.getInputStream(); ybaY+![* //logResponseHead(httpConnection); G`!x+FB O|Uz)Y94 =\Q<TY byte[] b = new byte[1024]; *-0s
`rC int nRead; }`R,C~-|^ while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) R"ON5,E { #X Q/y} ( nStartPos += fileAccessI.write(b,0,nRead); w8lrpbLh //if(nThreadID == 1) U]hqRL // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Yp\n=#$[ } bBIh}aDN 0ix(1`Z >u= Utility.log("Thread " + nThreadID + " is over!"); "FHJ_$! bDownOver = true; M9)4ihK //nPos = fileAccessI.write (b,0,nRead); i6Z7O)V } a (U52dO, catch(Exception e){e.printStackTrace ();} HZ3;2k } S:1[CNL; } CPB{eQeDuv Es>' N3A
z PUQ",;&y1 //打印回应的头信息 FjCGD4x1N public void logResponseHead(HttpURLConnection con) rLTBBvV { ^4=#,K for(int i=1;;i++) rKgl:sj+ { [O3:?BNY String header=con.getHeaderFieldKey(i); 9NTNulD>P if(header!=null) a1pp=3Pd?~ //responseHeaders.put(header,httpConnection.getHeaderField(header)); @i ~ A7L0/ Utility.log(header+" : "+con.getHeaderField(header)); +4yre^gC else `v-[& break; ~'M<S=W } =lAjQt } E{
/,
b) vyZ&%?{*R /&Q{B f public void splitterStop() /r4l7K { |d0ZB_ci bStop = true; xPZ>vCg } |_?e.}K C0N
:z.)4 puPI^6y% } jG>W+lq O9daeIF0# \2@J^O1, /* _}R9!R0O **FileAccess.java :#:|:q.] *//文件访问(定位,写) 0AHQ(+Ap package NetFox; 5W)ST&YPL* import java.io.*; *2Pr1U U:8[%a "$(+M t^ public class FileAccessI implements Serializable{ tWn
dAM(U7 5x+]uABE //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ` <1Wf RandomAccessFile oSavedFile; z}E_wg long nPos; X['9;1Xr Ki><~!L \Th<7WbR6# public FileAccessI() throws IOException #Hrzk!&9 { m*m),mZ" this("",0); JP8}+ } * zp tbZ c)#P}Ai 0O"W0s"T# public FileAccessI(String sName,long nPos) throws IOException b`X''6 { 6+$2rS$1V oSavedFile = new RandomAccessFile(sName,"rw"); g-qXS]y7 this.nPos = nPos; G(t:s5: oSavedFile.seek(nPos); ujV{AF`JfB } <UGaIb
FMdu30JV 'dwW~4|B public synchronized int write(byte[] b,int nStart,int nLen)
Fbo"Csn_ { Tu(:? int n = -1; !EIH"`>! try{ <~mqb=qA$ oSavedFile.write(b,nStart,nLen); \ZRII<k5) n = nLen; bbjba36RO } _-f LD catch(IOException e) 6Y2,fW8i, { wwl,F=| Y e.printStackTrace (); ZJ{DW4#t } 3@=<4$ b]]k\b 7Q/H+) return n; .45wwouZkc } gp9O%g3' ;,-)Z|W ]MYbx)v) } W\[E Nd>zq Wqv7 /* ~"S5KroN **SiteInfoBean.java sA6Hk B. */ |6NvByc, package NetFox; :G#%+, xLIyh7$t @16y%]Q-E# public class SiteInfoBean { Oi?Q^ISxP ,;6%s>Cvd( Yy
4Was# private String sSiteURL; //Site's URL TJP;!uX private String sFilePath; //Saved File's Path o,k#ft< private String sFileName; //Saved File's Name M(8xwo-W private int nSplitter; //Count of Splited Downloading File 4oF,;o+v\4 TPb&";4ROf *Iw19o-I public SiteInfoBean() _`Kh8G
{e {//nSplitter的缺省值为5 E2
'Al6^C //default value of nSplitter is 5 0D:uM$
i] this("","","",5); '
Sd&I:? } I-.?qcy~ [9?]|4 :x q^T public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) y3*IF2G { b<fN,U<k sSiteURL= sURL; .f!'>_ sFilePath = sPath; 21$^k5 sFileName = sName; JKmd'ZGw this.nSplitter = nSpiltter; dd=5`Bo9Yh qyyLU@hd s5 Fn("h]n } d{!zJ+n #oGvxc7 UL7%6v{'* public String getSSiteURL() ^<yM0'0t { ~$a%& ]\ return sSiteURL; +&AU&2As } kGq<Zmy| n;b9f|&z a(o[ bH.|; public void setSSiteURL(String value) 'U`I { %4To@#c sSiteURL = value; u*;53 43 } {iq{<;)U?U /` x|-9 XeBSHvO_ public String getSFilePath() DA4!-\bt@ { K3UG6S\B return sFilePath; \v_t:
" } A%M&{S'+|X "ZVBn!
xcIZ'V public void setSFilePath(String value) q14A'XW { [laX~(ND{ sFilePath = value; "=!QSb } Ah2XwFg? 1[`l`Truz *DoEDw public String getSFileName() d0Kg,HB { S+OI?QS return sFileName; U7fE6&g } f{z%P I[ L@R%*-a uJp}9B60_ public void setSFileName(String value)
vrW9<{ { 7erao- sFileName = value; s9:2aLZ{ } VZlvmN !%M-w0vC9 |QgXSe7 public int getNSplitter() 0_y%Qj^e { 01q7n`o#zf return nSplitter; |]\bgh } {}^ELw 6k3l/ ~R Tx_(^K public void setNSplitter(int nCount) ujWHO$uz! { ng<`2XgU nSplitter = nCount; d<b,LD^ } kWz%v } `Zi #rr|)L FfgJ
2y _0j}(Q>|H# /* +@qk=]3a **Utility.java EIEq[`h */ yEqmB4^- package NetFox; uN(~JPAw5 -5 W0 K} @>:07]Dxo public class Utility { C[&&.w8Pm lM1!2d'P :d2u? +F public Utility() B:r-')!0$# { W=\dsdnu* C;)
xjZiR `U3 } 3ElpS^2W #
|I@`#O //线程睡眠 Yr= mLT|JN public static void sleep(int nSecond) l9ihW^ { mfN@tMp try{ >C}RZdO~ Thread.sleep(nSecond); FVmg&[
. }
*&0Hz{| catch(Exception e) ~&/Gx_KU { #"{8Z&Z e.printStackTrace (); wf@2&vJ } ;2|H6IN" } LI<5;oE; ] zY //日志 ui{_w @o public static void log(String sMsg) :Y3?, { VT7NWTJ, System.err.println(sMsg); T!a[@,)_
} U}0/V
c26 R*0F)M k-e@G' public static void log(int sMsg) KxwLKaImI { %nh'F6bNgv System.err.println(sMsg); UG_0Y8$ } lpUtNy } 8!SiTOzR? OJ 5 !+#> (F YJ^o /* ACYn87tq **TestMethod.java TMCA?r%Y\ */ AZy2Pu56 package NetFox; ?&m]du#6 $SVGpEw #Vigu,zY public class TestMethod { Rk[ * p >pvg0Fh *KH@u public TestMethod() +:%FJCOT { ///xx/weblogic60b2_win.exe a4RFn\4? try{ DZ.trtK SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 34Khg //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); a?~csP^?} SiteFileFetch fileFetch = new SiteFileFetch(bean); A_~5| fileFetch.start(); -$t,}3 } xN8JrZE& catch(Exception e){e.printStackTrace ();} !cwVJe :[f`HY& "@w%TcA } qjzW9yV+ zxUj1 TF-Ty public static void main(String[] args)
uE`|0 { yKEFne8^ new TestMethod(); oK:P@V6! } L_K\i? } WcO,4: 点击下载更多相关资料
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