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/* ~}'F887 f **SiteFileFetch.java t>xd]ti */ D//=m= package NetFox; /7/0x ./{ import java.io.*; 'c %S!$P import java.net.*; mrM4RoO /[=E0_t+ c?E{fD"Fc3 public class SiteFileFetch extends Thread { `)Ky0&? eKG2*CV vWjnI*6T# SiteInfoBean siteInfoBean = null; //文件信息Bean o&SSvW long[] nStartPos; //开始位置 w5,Mb long[] nEndPos; //结束位置 8 lT{1ro FileSplitterFetch[] fileSplitterFetch; //子线程对象 D-&an@ long nFileLength; //文件长度 wRvb8F0 boolean bFirst = true; //是否第一次取文件 |(%zb\#9 boolean bStop = false; //停止标志 )C~9E 5E File tmpFile; //文件下载的临时信息 8)j@aiF` DataOutputStream output; //输出到文件的输出流 O
)d[8jw" F #`=oM$5 //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) fjG&`m#" public SiteFileFetch(SiteInfoBean bean) throws IOException wTc)S6%7 { j:,9%tg siteInfoBean = bean; 91Z' //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Vzg=@A# tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); }m-"8\_D if(tmpFile.exists ()) IG ~`i I { nZk+ bFirst = false; ;9a 6pz< read_nPos(); =QOg 6 } 5(m(xo6 else "ju'UOcS/ { iE].&>w nStartPos = new long[bean.getNSplitter()]; F@YKFk+a nEndPos = new long[bean.getNSplitter()]; viX
+|A4gJ } m Y,|J\w@ K.~q+IYP[ 3Q^fVn$tk E_T2z4lw } ==N{1gO] HD>q(cK_|8 ino:N5&;; public void run() xc@Ss[ { =qy@Wvj$ //获得文件长度 O`[aU%4b //分割文件 W?woNt'n //实例FileSplitterFetch 4rg2y] //启动FileSplitterFetch线程 Xf[kI //等待子线程返回 ^teq[l$; try{ 6%G-Vs]*2 if(bFirst) tq1CwzRX { @WVcY:1t# nFileLength = getFileSize(); {$wjO7Glp if(nFileLength == -1) wf:OK[r9 { +>r/ 0b System.err.println("File Length is not known!"); lhBT@5Dm9 } kYjGj,m" else if(nFileLength == -2) tQBRA/ { ~W{2Jd System.err.println("File is not access!"); d%o&+l# } tV{4"Ij9[ else rl#p".4q { rv|)n>m for(int i=0;i<nStartPos.length;i++) yc?a=6q'm { ~1>.A(,=z nStartPos = (long)(i*(nFileLength/nStartPos.length)); =fO5cA6Z } PEW=@xj2y for(int i=0;i<nEndPos.length-1;i++) n\^Tq<] a { xo7Kn+ Kl nEndPos = nStartPos[i+1]; /JWGifH } {o.FlX nEndPos[nEndPos.length-1] = nFileLength; 4#:W.]U8 } %>g3~yl }
&2{tF i}B2R$Z3 *U
P@9D //启动子线程 v#U"pn|M fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; N _86t for(int i=0;i<nStartPos.length;i++) {/
BT9|LI { Yq%9M=#k fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), K|:@Z siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), gk0( ANx nStartPos,nEndPos,i); V4KMOYqm Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); {M^3m5.^ fileSplitterFetch.start(); F!]lU`z)= } 2AO~HxF // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), ZHm7Isa1 siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); VB,?Mo}R // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", )'6DNa[y nEndPos = " + nFileLength); g.zEn/SM // fileSplitterFetch[nPos.length-1].start(); =9fajRFTt A^y|J`k| <U!`J[n% //等待子线程结束 tX>
G,hw //int count = 0; ;;:-l99 //是否结束while循环 ,I%g|'2 boolean breakWhile = false; 93`
AWg/T 2gCX}4^3b RF%KA[Dj while(!bStop) '>' wK. { WYEKf9} write_nPos(); TwVlg; Utility.sleep(500); urMG*7i <c breakWhile = true; to=y#$_ Q=/</| bqnNLs<N for(int i=0;i<nStartPos.length;i++) Ns7(j- { oBzfbg8p if(!fileSplitterFetch.bDownOver) +KvU$9Ad> { 2E)wpgUc?e breakWhile = false; n1VaLD break; nysUZB
} O"c;|zCc> } b;cdIl!3 if(breakWhile) Z`KC%!8K break; 3
%|86:* &'}RrW-s PEuIWXr //count++; .tzG_ //if(count>4) o8-^cP1 // siteStop(); @]-jl}:] } lJis~JLd` 79xx2 Ft;^g3N System.err.println("文件下载结束!"); L&%s[ } 2|}+T6_q catch(Exception e){e.printStackTrace ();} !WpBfd>v.I } A#95&kJpy }9W4"e 2) w6W}"Uw //获得文件长度 (KF=On;=Y public long getFileSize() Bb}fj28 { 6Qy@UfB int nFileLength = -1; kAC&S!n try{ k+8q{5>A< URL url = new URL(siteInfoBean.getSSiteURL()); 6DuEL=C HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); jhg;%+KB httpConnection.setRequestProperty("User-Agent","NetFox"); U}PiY"S< ,}))u0q+: Hr]h
Jc int responseCode=httpConnection.getResponseCode(); [ zEUH:9D if(responseCode>=400) dRaNzK)M { @Q/-s9b processErrorCode(responseCode); L
W;heO" return -2; //-2 represent access is error >TP7 }u| } 13+<Q \ H.WE6 :pF_GkG String sHeader; q-`RI*1] Cz W:L&t .p=sBLp8 for(int i=1;;i++) DF
g,Xa# { r} P<iX //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Ga^Zb^y //Utility.log(in.readLine()); \T\b NbPn sHeader=httpConnection.getHeaderFieldKey(i); "F}'~HWZp if(sHeader!=null) Ik[s { z OSs[[ if(sHeader.equals("Content-Length")) .(X
lg-H, { Pf$pt nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); $F/EJ> break; HoLv`JA } 3 AHY| } e{A9r@p! else X!j{o break; v|ck>_"
. } 7-~Q5Kr. } $&=p+ catch(IOException e){e.printStackTrace ();} &%2*Wu; catch(Exception e){e.printStackTrace ();} ;=9
>MS} H%1$,]F +hRmO Utility.log(nFileLength); 2TES>} ~+H"
-+ * FeQ*`r return nFileLength; "GQl~ } 6MG9a>= jV/CQM5a+ k;EPpr-{ //保存下载信息(文件指针位置) ?|1Mv1C? private void write_nPos() JI/_ce { j6,ZEm try{ +'G0 {;b output = new DataOutputStream(new FileOutputStream(tmpFile)); Qe'g3z> output.writeInt(nStartPos.length); D-U<u@A4 for(int i=0;i<nStartPos.length;i++) /?6gdN { &(a(W22O // output.writeLong(nPos); $3d}"D output.writeLong(fileSplitterFetch.nStartPos); aP&D9%5 output.writeLong(fileSplitterFetch.nEndPos); @f!AkzI } (5<^p& output.close(); tQ~W EC } W0zbxJKjd catch(IOException e){e.printStackTrace ();} d vOJW". catch(Exception e){e.printStackTrace ();} D\~e&0* } o+?rI
p kJ(A,s| }sxn72, //读取保存的下载信息(文件指针位置) Vh<A2u3& private void read_nPos() <8#ObdY! { `*\{.;,]# try{ U,lJ"$' DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); j}+5vB|0 int nCount = input.readInt(); L fl-!1 nStartPos = new long[nCount]; cE{ =(OQ nEndPos = new long[nCount]; Sg]
J7;] for(int i=0;i<nStartPos.length;i++) ~"!a9GZ { &kQ!KA28 nStartPos = input.readLong(); DJQglt}~ nEndPos = input.readLong(); JeY'8B } M8@_Uj input.close(); cgj.e } ^+R:MBK catch(IOException e){e.printStackTrace ();} i_F$&?) catch(Exception e){e.printStackTrace ();} }~o
ikN: } QMk+RM8U (_9|w|( ^ft]b2i private void processErrorCode(int nErrorCode) \,sg)^w@ { C;a@Jjor' System.err.println("Error Code : " + nErrorCode); LQ-6vrbs } 8,o17}NY, idJh^YD g-yi xU //停止文件下载 Y5-kj,CB public void siteStop() gvnj&h.GV { o6?l/nJ bStop = true; .yVnw^gu for(int i=0;i<nStartPos.length;i++) `W[+%b fileSplitterFetch.splitterStop(); 9.0WKcwg ZM~`Gd9K0E 1.SkIu% } %{STz } ;o$;Z4:.D //负责部分文件的抓取 u fw cF* **FileSplitterFetch.java 8mgQu]> */ >IR$e=5$ package NetFox; fQQ|gwVki *=vlqpG )o8g=7Jm import java.io.*; W@B7yP7Rz import java.net.*; PZ34 *q 3 C"_$?y" B
<+K<,S public class FileSplitterFetch extends Thread { 0yHjrxc$ cw+g
z!! g 2'x#%ET String sURL; //File URL +{6`F1MO long nStartPos; //File Snippet Start Position M7VID6J. long nEndPos; //File Snippet End Position \|Qb[{<:, int nThreadID; //Thread's ID /{DaPqRa boolean bDownOver = false; //Downing is over z{6YC~ boolean bStop = false; //Stop identical M5Wl3tZL FileAccessI fileAccessI = null; //File Access interface b5Q8pWZg, d_iY&-gq/ {NeWdC
public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException Wy(pLBmb { 4zzlazU this.sURL = sURL; E|,30Z+ this.nStartPos = nStart; 1uC;$Aj6: this.nEndPos = nEnd; <Cr8V'c nThreadID = id; }Eb]9c\ fileAccessI = new FileAccessI(sName,nStartPos);//定位 <p)Z/ } nFj-<! #Jv43L H zS?n>ElI public void run() (h|ch# { Q^|6J#o[9 while(nStartPos < nEndPos && !bStop) YJc%h@ _=] { KJ pj |f3U%2@ W[GQ[h try{ shy URL url = new URL(sURL); >"bnpYSe HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); e^Aa! httpConnection.setRequestProperty("User-Agent","NetFox"); w`0)x5
TGR String sProperty = "bytes="+nStartPos+"-"; ]DU61Z"v?b httpConnection.setRequestProperty("RANGE",sProperty); }z?xGW/k Utility.log(sProperty); 8Y xhd
. &!6DC5 T|!D>l' InputStream input = httpConnection.getInputStream(); Y!;gQeC //logResponseHead(httpConnection); 4XD)E& .`mtA`N h*G#<M byte[] b = new byte[1024]; n3*UgNg%fK int nRead; )X~#n while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) =Iy/cHK { Dw*Arc+3V nStartPos += fileAccessI.write(b,0,nRead); -}< d(c //if(nThreadID == 1) :;q>31:h // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); &q"'_4 } KCl &H hc6.#~i @Mzz2&(dU Utility.log("Thread " + nThreadID + " is over!"); ^J0zXe -d bDownOver = true; l`G(O$ct //nPos = fileAccessI.write (b,0,nRead); =p5?+3"@ } rQn{L{ catch(Exception e){e.printStackTrace ();} .B6`OX&k } 'qdg:_L" } yS+(< ^g-Fg>&M C(xqvK~p //打印回应的头信息 =zz+<!! public void logResponseHead(HttpURLConnection con) A"0wvk)UcY { J
&{qppN for(int i=1;;i++) _IC,9bbg { G&.d)NfE String header=con.getHeaderFieldKey(i); sE-x"c if(header!=null) jk
K#e$7 //responseHeaders.put(header,httpConnection.getHeaderField(header)); >6XDX=JVI Utility.log(header+" : "+con.getHeaderField(header)); m**0rpA else HgYc@P*b break; B'<!k7Ewy } NP$e-" 1 } dFx2>6AZt fV*}c` Go-wAJ> public void splitterStop() Y+!Ouc!$ { wH+FFXGJs bStop = true; 4=~ 9v } W)|c[Q\ t3pZjdLJd B%TXw#| } P8"6"}B;T qbEKp HnB 7WgIhQ~ /* (W7;}g ysh **FileAccess.java t8t}7XD
*//文件访问(定位,写) gW'P`Oxw package NetFox; &t~zD4u B import java.io.*; $K+4C0wX` Sjw2 j#Q P/C&R-{') public class FileAccessI implements Serializable{ 3w
t:5
Im UaH26fWs //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 zhuyePn RandomAccessFile oSavedFile; c"sj)-_ long nPos; P#w}3^ &7$,<9. "kcpA#uD| public FileAccessI() throws IOException 6e-#XCR{ { \d `dV0X this("",0); NS7@8 #C } 7vii9Am7 h9w@oRp`~ 44'=;/ public FileAccessI(String sName,long nPos) throws IOException n33JTqX { 1y},9ym oSavedFile = new RandomAccessFile(sName,"rw"); fndK/~?]H this.nPos = nPos; >{j,+$%kp oSavedFile.seek(nPos); =$^Wkau } _7r qXkp% &=v/VRan[ <^CYxy public synchronized int write(byte[] b,int nStart,int nLen) R#"U/8b>z { u^}7Vs
. int n = -1; V<7R_}^_7 try{ T[i7C3QS oSavedFile.write(b,nStart,nLen); kb/|;! n = nLen; v9Z lNA7m! } v(qV\:s}m catch(IOException e) `V]egdO { u&1j>`~qJ e.printStackTrace (); =nJOaXR0 } g2+l@$W XD;15a :*mA,2s return n; e*Uz#w: } l84h%, "WF(
6z# >{O[t2& } ?R|fS*e2EB * \=2KIF' aDm-X r /* >/7KL2* **SiteInfoBean.java DePV,. */ LL|_c4$Ky package NetFox; 4q\.I+r^ qWRNHUd %00k1*$ public class SiteInfoBean { Jo6~r- ]I{qp~^#n 844tXMtPB\ private String sSiteURL; //Site's URL vDu0 private String sFilePath; //Saved File's Path tb-OKZq private String sFileName; //Saved File's Name Q3B'-BZe private int nSplitter; //Count of Splited Downloading File j[$B\H qPFG+~\c lH#@^i|G public SiteInfoBean() xFsB?d {//nSplitter的缺省值为5
K^!e-Xi6 //default value of nSplitter is 5 ,omp F$% this("","","",5); rK(x4]I
l" } "C$!mdr7 09}f\/ $\YLmG public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) ;4-pupK~% { m[g< K sSiteURL= sURL; |QAeQWP+1 sFilePath = sPath; &=s| sFileName = sName; 6e$sA (a=i this.nSplitter = nSpiltter; 9B!im\]O 4i+PiD:H % +kT } 37:b D CX&yjT6` (ybtXoQs public String getSSiteURL() <F#*:Re_y { yNhscAMNn return sSiteURL; Dyouk+08x } +E q~X=x / K_e;(Y_ lRF_ k public void setSSiteURL(String value) 48 c
D3w { H y.3ccZ0 sSiteURL = value; y (c|5CQ } t_dw}I ?l\gh1{C %#Wg^l
' public String getSFilePath() 5C Y@R { YA^wUx return sFilePath; :Fi%Cef| } 1^x2WlUm4 O?j98H
Sya =BqaGXr public void setSFilePath(String value) !
kOl$!X4 { S1H47<)UF sFilePath = value; dVsAX( } 4,w{rmj 0TuOY%+ 6yu*a_ public String getSFileName() )F%wwc^r { g9([3pV, return sFileName; sl^s9kx;C$ } %|D\j-~ 6PzN>+t^y qSpa4W[ public void setSFileName(String value) aiR|.opIb { MUCJ/GF* sFileName = value; =XacG}_ } Cdt,//xrz 0'V- pE(<XD3Q public int getNSplitter() L6rs9su=7 { {x&jh|f`g return nSplitter; s!j(nUd/ } Eis%)oE
`jUS{ 3^ B(en5| public void setNSplitter(int nCount) R@7GCj { j;AzkReb nSplitter = nCount; vHI"C % } I(?|Ox9"? } t'=~"?T/o $@u^Jt, ? MOqA$b /* -X&!dV:= 4 **Utility.java xPfnyAo?%z */ 2=Y_Qrhi package NetFox; 1(:=jOfk rd"]@~v1 F;MT4*4 public class Utility { <_sT]?N# RZV1:hNN k9_VhR|! public Utility() ;GSFQ:m[ { #a'x)$2;R| [#Nx>RY Z z;<P } {Jw<<<G W
&0@&U //线程睡眠 ,I2reG public static void sleep(int nSecond) YW$x: { e@2Vn? 5 try{ ]!tYrSM! Thread.sleep(nSecond); 1&@wb'MBs. } QnP?; catch(Exception e) Pu%>j'A { wh7a| e.printStackTrace (); >e$^#\D } SG|i/K|7 } EkjK92cF [>J~M!yu:r //日志
S9"y@F
< public static void log(String sMsg) S~a:1
_Wl { P=sK+}5`q System.err.println(sMsg); ZvnZ}t>? } 1M~:]}*< #`#aSqGmc dW^_tzfF7 public static void log(int sMsg) oIL+@}u7 { qiKtR System.err.println(sMsg); 5.K$
X$+7} } G}dOx}kT } Lq
$4.l[j 2W:?#h3 Zz)oMw /* NX{-D}1X= **TestMethod.java 7si*%><X */ agxSb^ 8tF package NetFox;
jQ\
MB 8.Own=G? zR JKIm public class TestMethod { p|9ECdU>; dG~B3xg;5i ??%T public TestMethod() pffw5Tc { ///xx/weblogic60b2_win.exe ZLio8 try{ d>"$^${ SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); X @jYQ. //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); ]I' xLh` SiteFileFetch fileFetch = new SiteFileFetch(bean); -IsdU7} fileFetch.start(); WWs[]zr } v/00LR catch(Exception e){e.printStackTrace ();} <:;:*s3] }`/n2 KjfKo;T } |XdrO #z^1)7 xE-`Bb public static void main(String[] args) 6k=Wt7C { ;YXr G new TestMethod(); er7/BE& } 09;'z } tG^ ?fc 点击下载更多相关资料
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