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/* _D.4=2@|l8 **SiteFileFetch.java #|-i*2@oR */ VYG o; package NetFox; o@2Y98~Q} import java.io.*; "d"6.ND import java.net.*; ((Uw[8#2` efN5(9*9R [$]qJ~kz public class SiteFileFetch extends Thread { *E.uqu>I 0H!J <*_DC)&79 SiteInfoBean siteInfoBean = null; //文件信息Bean "vvv@sYxi long[] nStartPos; //开始位置 SR>(GQ,m0; long[] nEndPos; //结束位置 C:r3z50 FileSplitterFetch[] fileSplitterFetch; //子线程对象 hik.c3 long nFileLength; //文件长度 B}fd#dr boolean bFirst = true; //是否第一次取文件 dC>[[_ boolean bStop = false; //停止标志 @PzRHnT* File tmpFile; //文件下载的临时信息 aE(DNeG-H DataOutputStream output; //输出到文件的输出流 <H,E1kGw9 Fe1^9ja //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) M.qE$ public SiteFileFetch(SiteInfoBean bean) throws IOException XcFu:B { >1BDt:G36 siteInfoBean = bean; &0x;60b //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); &iO53I^r/ tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); q~. .Z Y`7 if(tmpFile.exists ()) j6GR-WQ]t { lk4U/: bFirst = false; "N3!!3 read_nPos(); pnpf/T{xpM } Esdv+f}4; else Ug#EAV<m { woUt*G@ nStartPos = new long[bean.getNSplitter()]; o*5b]XWw nEndPos = new long[bean.getNSplitter()]; '$h0l-mQ } }hA)p: LS/ZZAN u SoHw9FtS ef K
WR } ,l#f6H7p
)1/J5DI @8 [{PmU~RMYf public void run() >p29|TFbV { 1`2lq~=GV //获得文件长度 _b!
TmS#F1 //分割文件 *5mJA -[B+ //实例FileSplitterFetch GLA4O) //启动FileSplitterFetch线程 g$U7bCHG //等待子线程返回 2,r jy|R` try{ X\|h:ce if(bFirst) Tffdm { P\3H<?@4 nFileLength = getFileSize(); b
v4 if(nFileLength == -1) XZ4H(Cj { 7&2CLh System.err.println("File Length is not known!"); Zr|\T7w 3 } E9Hyd #A else if(nFileLength == -2) 3J[ 5^ { *#Iqz9X.Y3 System.err.println("File is not access!"); K 5AArI } 'ALe>\WO else ui&^ m, { |DUOyQ for(int i=0;i<nStartPos.length;i++) ;m}o$` { sDS0cc6e nStartPos = (long)(i*(nFileLength/nStartPos.length)); 4EFP*7X } yb-/_{Y for(int i=0;i<nEndPos.length-1;i++) 8 O.5ML{ { (RLJ_M|;/b nEndPos = nStartPos[i+1]; ?j$*a7[w } 9=G
dj!L nEndPos[nEndPos.length-1] = nFileLength; `$>cQwB,D } 7VA6J-T } S^ JUQx7 u`wT_?%w ixJwv\6Y //启动子线程 D,SL_*r{ fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 6gD|QC~; for(int i=0;i<nStartPos.length;i++) 6'JP%~QlS { B:tGD@ fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), B=hJ*;:p siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), fZt3cE\ nStartPos,nEndPos,i); YL@d+
-\ Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ]]_H|tO fileSplitterFetch.start(); * TR~>| } !'
jXN82 // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), -1 _7z{. siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); >Av%[G5=h# // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", W'<cAg? nEndPos = " + nFileLength); x^JjoI2vf // fileSplitterFetch[nPos.length-1].start(); fa;GM7<e) U4,hEnJBT eZ
+uW0 //等待子线程结束 OvW/{ //int count = 0; k<\]={|= //是否结束while循环 Nx"v|" boolean breakWhile = false; AZadNuL/ e,Fe,5E&g 1Qgd^o:d while(!bStop) >zWVM1\\j { &)|3OJ'o write_nPos();
js8\" Utility.sleep(500); N0G-/ breakWhile = true; #L,5;R{` \^%5! O5p]E7/e for(int i=0;i<nStartPos.length;i++) JPT VZ { @X6|[r&Z if(!fileSplitterFetch.bDownOver) u(|k/~\ { Ig6>+Mw breakWhile = false; iXDQ2&gE* break; xj!_]XJ^w } T4{&@b
0* } v]HiG_C if(breakWhile) ^6
sT$set break; o$r]Z1 ywV8s|o U"v}br-kb //count++; /< CjBW: //if(count>4) IK-E{,iKc // siteStop(); k&P_ c } ')w*c V
F'!
OPN :1wMGk System.err.println("文件下载结束!"); Xsc5@O! } YA>du=6y\ catch(Exception e){e.printStackTrace ();} ]-aeoa# } (UV+/[, 8EPV\M1% =7mR#3yt //获得文件长度 +mT}};-TS public long getFileSize() G
K @]61b { 3EcmNwr int nFileLength = -1; 5Ffz^;i try{ q'?:{k$% URL url = new URL(siteInfoBean.getSSiteURL()); gH0B[w ] HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); j]<T\O>t> httpConnection.setRequestProperty("User-Agent","NetFox"); _rqOzE) `B6{y9J6 K`FgU7g{ int responseCode=httpConnection.getResponseCode(); *[7,@S/<F if(responseCode>=400) bhSpSul { O`dob&C processErrorCode(responseCode); = sIR[V'( return -2; //-2 represent access is error 685o1c| } @X/S
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BgHD) String sHeader; IO xj$ ?%l ZZE %`}CbD6 for(int i=1;;i++) .KT+,Y { 1qUdj[Bj //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); VJCh5t* //Utility.log(in.readLine()); S53%*7K. sHeader=httpConnection.getHeaderFieldKey(i); n/8Kb.Vf if(sHeader!=null) 9rao&\eH { #G.3a]p}" if(sHeader.equals("Content-Length")) #K!Df%,< { cJ8F#t nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); 2c%}p0<;|? break; !icpfxOpjQ } kFM'?L& } sp**Sg) else 4&ea*w break; sD{b0mZT } ;6b#I$-J- } \ @N> 38M catch(IOException e){e.printStackTrace ();} i8B%|[nm catch(Exception e){e.printStackTrace ();} <YeF?$S} _;B!6cRLps 7Xad2wXn Utility.log(nFileLength);
kw-/h+lG FOk @W& U*&ZQw return nFileLength; Km <Wh= } ^2kWD8c* "ZyHt HAK 3yKI2en" //保存下载信息(文件指针位置) +cV!=gDT private void write_nPos() |Lhz^5/ { <,E*,&0W try{ pz&=5F output = new DataOutputStream(new FileOutputStream(tmpFile)); hx^a&" output.writeInt(nStartPos.length); 'o7PIhD" for(int i=0;i<nStartPos.length;i++) $k`8Zx w { %C3cdy_c // output.writeLong(nPos); Q"Ec7C5eM output.writeLong(fileSplitterFetch.nStartPos); *c AoE l output.writeLong(fileSplitterFetch.nEndPos); sRZ:9de+ } 5dgBSL$A}] output.close(); R&4E7wrdP } AltE~D/4 catch(IOException e){e.printStackTrace ();} wFJK!9KA8 catch(Exception e){e.printStackTrace ();} fjWh}w8 } 8zc!g|5" Y=rr6/k llleo8 //读取保存的下载信息(文件指针位置) z;/'OJ[. private void read_nPos() *n*y!z { U2AGH2emw try{ 2T3DV])Q DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); /J+)P<_ A int nCount = input.readInt(); AfEEYP)N nStartPos = new long[nCount]; &!a2%%1#N nEndPos = new long[nCount]; q],R6GcVr for(int i=0;i<nStartPos.length;i++) |f:d72{Qr { btF%}<o) nStartPos = input.readLong(); [;=ky<K0E nEndPos = input.readLong(); Dgm%Ng } A C^[3 input.close(); cP2R24th } ^<VE5OM catch(IOException e){e.printStackTrace ();} -{*V)J_Co catch(Exception e){e.printStackTrace ();} Uu
X"AFy~\ } 668bJ.M\O 1QJ$yr I.u,f:Fl' private void processErrorCode(int nErrorCode) N1!5J(V4 { 9-Qtj49 System.err.println("Error Code : " + nErrorCode); ]'h)7 } J3x7i8 lDU:EJ&DHE ~|9LWp_ //停止文件下载 SU'1#$69F public void siteStop() .:ZXtU { 62x< rph bStop = true; (A'q@-XQ for(int i=0;i<nStartPos.length;i++) 02^(z6K'&? fileSplitterFetch.splitterStop(); H27Oq8 #=H}6!18 )Zf}V0!?+ } gyQ9Z} } d95N$n
//负责部分文件的抓取 jN}7BbX **FileSplitterFetch.java wmr%h q */ thPH_DW>eb package NetFox; ]XGn2U\ *6D%mrK g**%J Xo import java.io.*; 9H}iX0O import java.net.*; `O=;E`ep !en F8a O4PdN? public class FileSplitterFetch extends Thread { :/[YY?pg- ,L{o,qzC 06@0r String sURL; //File URL Wx|6A#cg! long nStartPos; //File Snippet Start Position sR>;h / long nEndPos; //File Snippet End Position .(dmuV9 int nThreadID; //Thread's ID T{H#]BF<E boolean bDownOver = false; //Downing is over (bFWT_CChz boolean bStop = false; //Stop identical HA.NZkq.tV FileAccessI fileAccessI = null; //File Access interface _{`'{u
d)GkXll1D mz VuQ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 5-5(`OZ{' { 3Ra\2(bR this.sURL = sURL; 7YXXkdgbd this.nStartPos = nStart; ({_:^$E\ this.nEndPos = nEnd; S7NnC4)=-f nThreadID = id; Bx}0E fileAccessI = new FileAccessI(sName,nStartPos);//定位 h>^jq{yu } mf]( 3ZL 4}8+)Pd N]s7/s public void run() p]V-< { `\|3
~_v while(nStartPos < nEndPos && !bStop) [rUh;_b\D { qtwT#z;Y 2.Eu+*UC 28Ssb| try{ QK3j_'F=E URL url = new URL(sURL); Q 9gFTLQ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); %$Jqt httpConnection.setRequestProperty("User-Agent","NetFox"); =wlm String sProperty = "bytes="+nStartPos+"-"; CVGOX z httpConnection.setRequestProperty("RANGE",sProperty); -M1~iOb Utility.log(sProperty); Xc9p;B>^Ts (w#slTFT pRiH,:\ InputStream input = httpConnection.getInputStream(); 4gv.E 0Fo //logResponseHead(httpConnection); _8x'GK
tU KT
lP:pB; *_{l byte[] b = new byte[1024]; p'Y&Z?8 int nRead; {7K'<ti while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) ET,0ux9F { N
o_$!)J. nStartPos += fileAccessI.write(b,0,nRead); ;o_V!<$ //if(nThreadID == 1) n{.*El>{ // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); Msv*}^> } <uBhi4 k%Ma4_Z R8=I)I-8 Utility.log("Thread " + nThreadID + " is over!"); oeu|/\+HW bDownOver = true; 3WO#^}t //nPos = fileAccessI.write (b,0,nRead); j[m_qohd7 } (c(-E|u. catch(Exception e){e.printStackTrace ();} g+ >=C } D0Vyh"ua } -~vl+L dN]Zs9] .])>A')r //打印回应的头信息 H )BOSZD public void logResponseHead(HttpURLConnection con) Sc;iAi
( { 1a($8> for(int i=1;;i++) )K>Eniou { sorSyuGr String header=con.getHeaderFieldKey(i); dN$ 1$B^k if(header!=null) w+Z- -@\ //responseHeaders.put(header,httpConnection.getHeaderField(header)); a,/M'^YyN Utility.log(header+" : "+con.getHeaderField(header)); #dva0%-1 else _o@(wGeu# break;
_'!aj+{ } D~G5]M,}$ } ,s1&O` -M7K8 pP|,7c5 public void splitterStop() U0NOU# { , vY)n6 bStop = true; g\ErJ+i } ! (2-(LgA |ZvNH ~! <Vz<{W3t } [<]Y+33 rPRrx-A BQyvj\uJ /* jrIA]K6 **FileAccess.java =?=)s *//文件访问(定位,写) 5;X {.2 package NetFox; El~-M`Gf import java.io.*; BX@pt;$ek7 uz ]E_&2 1a<]$tZk public class FileAccessI implements Serializable{ k1wCa^*gc
*f79=x //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 ?QGmoQ) RandomAccessFile oSavedFile; ~}h^38 long nPos; q.-y)C) ; ?3`q+[: 92!JKZe
public FileAccessI() throws IOException *Wzwbwg
{ %PzQ\c this("",0); yc*<:(p } 0eFb?Z0] {]=v]O|, I[ai: public FileAccessI(String sName,long nPos) throws IOException Am=wEu[b { K>kLUcC7Z oSavedFile = new RandomAccessFile(sName,"rw"); vK(I3db! this.nPos = nPos; 2A*/C7 oSavedFile.seek(nPos); tG/1pW } -PM)EGSk{ M:_!w[NiLp K'NcTw#f public synchronized int write(byte[] b,int nStart,int nLen) \ EZ+#3u { S."7+g7Ar int n = -1; Kh)FyV try{
/KAlK5< oSavedFile.write(b,nStart,nLen); Q!K`e )R n = nLen; ^|aNG`|O } @&5 A&( catch(IOException e) \83sSw { ;W0]66& e.printStackTrace (); +e'X; } GQx9u^> >dk9f}7- ]NtSu%u return n; \X&
C4# } g]|_
` IZ 8y}2 ?>V6P_r> } |) Pi6Y y? "@v. !9r:&n.\ /* 4\p-TPM **SiteInfoBean.java 2J<&rKCF */ 9cQ_mgch package NetFox; cx^{/U?9} 5lTD]d A62<]R)n public class SiteInfoBean { ] TSg!H -#?<05/C> dn,g Z"< private String sSiteURL; //Site's URL EA|k5W*b private String sFilePath; //Saved File's Path |)o#|Qo
private String sFileName; //Saved File's Name v7IzDz6gF private int nSplitter; //Count of Splited Downloading File t)N;'v & DA"}A`HfI zX kx7d8 public SiteInfoBean() +y&d;0! {//nSplitter的缺省值为5 H9`
f0(H //default value of nSplitter is 5 6:?rlh this("","","",5); }"zC
>eX& } \M(*=5 7zDiHac +a|/l public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) '#Dg8/r! { ALGgAX3t sSiteURL= sURL; lj2=._@R sFilePath = sPath; },c,30V' sFileName = sName; a<m-V&4x this.nSplitter = nSpiltter; [pgZbOIN37 zgKY4R{V ~rv})4h } GXX+}=b7qO &~-~5B|3" 5j^NV&/_ public String getSSiteURL() E\{< ;S { 8Fq_i-u return sSiteURL; . L;@=Yg) } N[U9d}Zv mlu 3K Zk?
= public void setSSiteURL(String value) i0pU!`0 { *'ZN:5%H sSiteURL = value; uDayBaR } 0ys~2Y!eH xxa} YIe8 \#dl6:" public String getSFilePath() 5bX6#5uP1 { Lz4ehWntO return sFilePath; ?o[L7JI } >SCGK_Cr2 9=+-QdX+0] .~klG&>aV public void setSFilePath(String value) 6)*xU|fU { >HTbegi sFilePath = value; \4bWWy } `M@Ak2gcR+ |)U|:F/{@ 3|kgTB- public String getSFileName() g+[kde;(^ { O`W%Tr return sFileName; H\G{3.T.9 } IazkdJX~ i~yX tya ,Og4
?fS public void setSFileName(String value) >Pal H24] { {aj/HFLNY sFileName = value; d;G~hVu } i|$z'HK;+ aXR%;]<Dw ff cLuXa public int getNSplitter() f_6`tq m% { Q/^A #l[ return nSplitter; XGs^rIf } TZB+lj1 Dy9\O77> ?y7w} W public void setNSplitter(int nCount) 2qj{n+ { -|_ir-j nSplitter = nCount; f~M8A. } >|udWd^$3 } ?&c:q3_-Z :pC;`iQ 8L{u}|{ /* ;+_8&wbqW **Utility.java G*n2Ii */ \L]|-f(4 package NetFox; hKe30#:v =,/D/v$m'2 zICI_*~ public class Utility { v%91k XB\zkf_}Xc BGWAh2w6 public Utility() }KB[B { *y7 $xa4 trYTs,KV M<`|CVl } >- Bg%J9 "QY1.:o<( //线程睡眠 B;t=B_oK public static void sleep(int nSecond) N}Vn;29 { ;A#~`P try{ *|RS*ABte Thread.sleep(nSecond); &O1v,$}' } GESXc$E8 catch(Exception e) 0|Ucd { (JZ".En#X e.printStackTrace (); !]b@RUU } `a4 $lyZ } %_f;G+fK\p ef]B9J~h //日志 ZF{~ih*^u public static void log(String sMsg) m_lrPY- { uP|FJLY System.err.println(sMsg); ]0~qi@ } b|?;h21rG dHII.=lT Spj9H ?m public static void log(int sMsg) P_Uutn~ { ($d4:Ww System.err.println(sMsg); N}QFGX } 5h^[^*A? } km 5E)_] `,#!C`E 9 '2v f|CX /* m,6hee **TestMethod.java ^.HWkS`e */ <GZhH: package NetFox; +R\~3uj[7 ,2zKQ2z |uUuFm public class TestMethod { !$>G#+y _s>^?x} JvJ;bFXD public TestMethod() zSgjp\ { ///xx/weblogic60b2_win.exe p_6P`Yx^e try{ W~dE SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); 8/q*o>[? //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); -!R
l(if SiteFileFetch fileFetch = new SiteFileFetch(bean); l,y^HTc}7/ fileFetch.start(); aN'0}<s } 'NjSu64W catch(Exception e){e.printStackTrace ();} Vy;_GfT$ !5.v'K' PqfVX8/q0 } </ZHa:=7 l1RlYl5 }td6fj_{ public static void main(String[] args) k?-S`o%Q { CWMlZVG new TestMethod(); UK:M:9 } 9::YR;NY } uI9lK 点击下载更多相关资料
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