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/* f0!))/rSD **SiteFileFetch.java 4d"r^y' */ S2E8Gq9 package NetFox; GeI-\F7b import java.io.*; XWnVgY s import java.net.*; 5CuuG<0 X3(tuqmi a,Sw4yJ!Q public class SiteFileFetch extends Thread { |U~<3.:m: lVd^
^T*fh 84$nT>c SiteInfoBean siteInfoBean = null; //文件信息Bean [m+2(I1 long[] nStartPos; //开始位置 iyN:%ofh long[] nEndPos; //结束位置 'Jiw@t<o3` FileSplitterFetch[] fileSplitterFetch; //子线程对象 9y6-/H
, long nFileLength; //文件长度 AJt+p&I[J boolean bFirst = true; //是否第一次取文件 `K*Q5n boolean bStop = false; //停止标志 w?3p';C File tmpFile; //文件下载的临时信息 PYiU_ DataOutputStream output; //输出到文件的输出流 >u>5{4 )S3\,S-. //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) "Hya6k>j public SiteFileFetch(SiteInfoBean bean) throws IOException
>/{@C { 9K.Vb1& siteInfoBean = bean; &]V.S7LC# //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 7Sf
bx~48 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); H[m:0eF'5 if(tmpFile.exists ()) 2uzW+D6J { f0A{W/0n bFirst = false; 'SO %)B read_nPos(); WJ$bf(X* } i1UiNJh86 else A8xvo/n$ { v>:Ur}u!D nStartPos = new long[bean.getNSplitter()]; f<
ia(d nEndPos = new long[bean.getNSplitter()]; >q#rw } Ki4r<>\l{H F7A=GF' ZLc -RM q6@Lp^f } v5/~-uRL% RW|`nL 9"NF/)_ public void run() &]g}u5J!= { -O1>|y2rU //获得文件长度 bNm#tmSt //分割文件 ICpAt~3[M //实例FileSplitterFetch jGJLSEe_ //启动FileSplitterFetch线程 .RE:;<|w //等待子线程返回 2^Eg9y' try{ t\?ik6 if(bFirst) mGtdO/C#B { FFl!\y*0z nFileLength = getFileSize(); NYt&@Z}] if(nFileLength == -1) s0\X ^ { &[_g6OL System.err.println("File Length is not known!"); Jk&3%^P{m } neB\q[k else if(nFileLength == -2) d.3E[AJa( { eS{!)j_^ System.err.println("File is not access!"); B%"
d~5Y } $}RJ,%~'x else !4]TXH0f { O80<Z#%j` for(int i=0;i<nStartPos.length;i++) @>u]4Jn { 6,o~\8ia nStartPos = (long)(i*(nFileLength/nStartPos.length)); I*%-cA%l } G(Lzf( for(int i=0;i<nEndPos.length-1;i++) o#;b { t,QyfN nEndPos = nStartPos[i+1]; bT\1> } ]}*R| 1 nEndPos[nEndPos.length-1] = nFileLength; IW>T}@
| } _?<|{O } 7zA'ri3w jDKO}
bQ 5BWH-2HsB //启动子线程 a!ud{Dx fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 46$._h
P for(int i=0;i<nStartPos.length;i++) vY4\59]P { R_(tjkT fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), hwu]Er.gn siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), mi
ik%7>W nStartPos,nEndPos,i); B,<da1(a Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); %9w::hav fileSplitterFetch.start(); b+,';bW } Mxe}B' // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 5G::wuxk siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); ! _f9NK // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", gaQdG=G8$ nEndPos = " + nFileLength); 48c1gUwoP // fileSplitterFetch[nPos.length-1].start(); s2teym,uG h xSKG :S.9eFfa //等待子线程结束 ~{d$!`|a //int count = 0;
05z,b]>l //是否结束while循环 uPhK3nCGo boolean breakWhile = false; b$4"i XSQ XnDUa3 K:!"+q while(!bStop) ^]7}YF2| { (^s>m,h write_nPos(); H+1-] 'g` Utility.sleep(500); L\Aq6q@c breakWhile = true; Uhe=h&e2k@ JX-'
mV` 4y)P>c for(int i=0;i<nStartPos.length;i++) 2w59^"<, { mlixIW2 if(!fileSplitterFetch.bDownOver) E7NV ^4h { XDsx3Ws breakWhile = false; esHg'8?U break; U@g4w!$r } !HrKXy0{ } 'L
8n-TyL if(breakWhile) lm!.W5-l break; qo p^;~ ,ek_R)&[o G.rrv //count++; +Fuqchjq //if(count>4) 1|RANy // siteStop(); =5Q]m6-SgV } EwuO&q
%{ABaeb] *194{ ep System.err.println("文件下载结束!"); jNTjSX } YwteZSbp6M catch(Exception e){e.printStackTrace ();} ZZk=E4aae } U[SaY0Z I`p+Qt wN`jE0
{ //获得文件长度 ]j'p :v public long getFileSize() q
]M+/sl { i'4B3 int nFileLength = -1; J!0DR4=Xi try{ !6BW@GeF] URL url = new URL(siteInfoBean.getSSiteURL()); :ZTc7} HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); g,}_G3[j0m httpConnection.setRequestProperty("User-Agent","NetFox"); ^oVs+ vC |s"nM<ZNZ $eD.W int responseCode=httpConnection.getResponseCode(); qm./|#m> if(responseCode>=400) 'd.EC# { 5V6G=H processErrorCode(responseCode); pNOwDJtK return -2; //-2 represent access is error FB
_pw!z } s8-<m,* A9f)tqbc uxW~uEh String sHeader; .P;*D ws KB%"bqB| r
YogW! for(int i=1;;i++) %`OJ.:k { o}W%I/s //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); .Si,dc\ //Utility.log(in.readLine()); *FC=X) _&W sHeader=httpConnection.getHeaderFieldKey(i); (5#nrF] if(sHeader!=null) }2<r, { TcIcS]w% if(sHeader.equals("Content-Length")) =4[v3Qx { KAC6Snu1 nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); IOb*GTb break; :E_g"_ } z*kutZ:6Y } MNC*Glj= else x97
j break; bLe<G } ,8:(OB|a } >_o} catch(IOException e){e.printStackTrace ();} &QDW9
Mi catch(Exception e){e.printStackTrace ();} E_k$W5 'SCidN(n ~Q?a|mV, Utility.log(nFileLength); |UK} K <pV hCCiD9gz return nFileLength; S/^"@?z,vE } X}tVmO? My<snmr2d &0NFb^8+ //保存下载信息(文件指针位置) 'XZ)!1N private void write_nPos() GqWB{$J;" { 2W/?q!t try{ T?
tG~ output = new DataOutputStream(new FileOutputStream(tmpFile)); ])L
A42| output.writeInt(nStartPos.length); CZ(/=3,3n for(int i=0;i<nStartPos.length;i++) KMU4n-s"o { I2 j}Am // output.writeLong(nPos); "ul {d(K3 output.writeLong(fileSplitterFetch.nStartPos); ]3VI|f$$ output.writeLong(fileSplitterFetch.nEndPos); <1FC%f/ } E0u~i59Z output.close(); 29!q!g | } ?%`@ub$ catch(IOException e){e.printStackTrace ();} X=hYB}}nu catch(Exception e){e.printStackTrace ();} BDq%'~/^ } Fb^:V4<T RnhL<
Ywu ,_yhz0. //读取保存的下载信息(文件指针位置) kD*2~Z ?; private void read_nPos() Ys@}3\Mc { Pm
lx8@D try{ nX(+s*Y+w DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); %;e/7`>Ma int nCount = input.readInt(); Bm"KOr$}- nStartPos = new long[nCount]; 1jy9lP= nEndPos = new long[nCount]; Rniq(FAx for(int i=0;i<nStartPos.length;i++) NbC@z9Q { #Yr9AVr}K nStartPos = input.readLong(); T2SP
W@#Z3 nEndPos = input.readLong(); 4T!+D } h<Ft_#|o[ input.close(); c8L~S/t } %7"X(Ts7B catch(IOException e){e.printStackTrace ();} cJ1#ge%4 catch(Exception e){e.printStackTrace ();} "kMguK}c } wm)#[x # |
\'rP_I> W6"v)Jc>_ private void processErrorCode(int nErrorCode) KcK>%% { VwOW=4`6 System.err.println("Error Code : " + nErrorCode); Svc|0Ad& } t: #6sF Ttxqf:OMf GFel(cx:K //停止文件下载 7RUofcax public void siteStop() ZJwrLV { JcbwDlUb bStop = true;
-TM0]{ for(int i=0;i<nStartPos.length;i++) |P -8HlOr fileSplitterFetch.splitterStop(); #$c Rkw %kB8'a3 1E73i_L } 9[m6Li } :E>HE,1b+ //负责部分文件的抓取 8"dv _`ym **FileSplitterFetch.java F8;dKyT?q */ dl~%MWAVb package NetFox; e XfZ5(na 7VMvF/ap]u zgs (Dt; import java.io.*; g>dA$h% import java.net.*; *M$0J'-BQ c0hwc1kv- n@U n public class FileSplitterFetch extends Thread { -C<zF`jO (*oL+ef-C qe!fk?T} String sURL; //File URL .G+Pe'4a long nStartPos; //File Snippet Start Position SE),":aY long nEndPos; //File Snippet End Position ``OD.aY^s int nThreadID; //Thread's ID 'bo~%WA]n boolean bDownOver = false; //Downing is over X LL/4 ) boolean bStop = false; //Stop identical SQqD:{#g" FileAccessI fileAccessI = null; //File Access interface L{(QpgHZ +"8,Mh \ gLHi~ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException #|*F1K { Q($Z%1S this.sURL = sURL; ~-PjW#J% this.nStartPos = nStart; emdoA:w+ this.nEndPos = nEnd; IRn2| nThreadID = id; _>9.v%5cs( fileAccessI = new FileAccessI(sName,nStartPos);//定位 Ti'}MC+0 } -u?S=h} !!Aj<*% |7X:TfJ public void run() `;)\u { ik!..9aB while(nStartPos < nEndPos && !bStop) zxf"87se { f-5:wM& 'Er:a?88l ]R=,5kK3 try{ `;>= '"O!\ URL url = new URL(sURL); s1e:v+B] HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); RLSc+kDH_ httpConnection.setRequestProperty("User-Agent","NetFox"); oI.G-ChP String sProperty = "bytes="+nStartPos+"-"; l'\pk<V httpConnection.setRequestProperty("RANGE",sProperty); lKlU-4 Utility.log(sProperty); PSPmO'C+ Er{#ziN+ :%sXO InputStream input = httpConnection.getInputStream(); FIbp"~ //logResponseHead(httpConnection); TpHfS]W-P F$^Su<w5l 6e_dJ=_ byte[] b = new byte[1024]; (s{RnD int nRead; CE"JS-S? while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) X`fn8~5
{ C&6IU8l\ nStartPos += fileAccessI.write(b,0,nRead); 7f~Sf //if(nThreadID == 1) _L@2_#h! // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); *P#WDXRwd } ?}m']4p Q4*fc^?u !}4MN:r Utility.log("Thread " + nThreadID + " is over!"); ,:`ND28V7 bDownOver = true; &NSY9'N, //nPos = fileAccessI.write (b,0,nRead); Fr%d}g } #(1j#\ catch(Exception e){e.printStackTrace ();} b*FC\:\ } Le*.*\ } c7M%xGrP cKn`/\.H `\m*+Bk[5 //打印回应的头信息 :OW;?{ ~j public void logResponseHead(HttpURLConnection con) Bf$_XG3
{ #?XQ7Im for(int i=1;;i++) l2&`J_" { (XXheC String header=con.getHeaderFieldKey(i); P9S2?Q if(header!=null) |QMhMGjV //responseHeaders.put(header,httpConnection.getHeaderField(header)); V=lfl1Ev0J Utility.log(header+" : "+con.getHeaderField(header)); I8QjKI ( else l983vKr break; %/>Y/!; } 9JWa$iBH@ } =&},;VOh \4AM*lZ ?_ dIIQ public void splitterStop() !H2QjW { +Y
V|ij bStop = true; o ,xxh } h(F<h_ =i(?deR hRq3C1mR } !wWJ^Oz= ]r-C1bKD` ?X5]i#j[ /* z.CywME<)t **FileAccess.java YG8>czC *//文件访问(定位,写) %eJGte- package NetFox; CT\;xt,S import java.io.*; B}eA\O4}I UK{irU|\ j+^oz'q public class FileAccessI implements Serializable{ 4]/7 )x?R p2N:;lXM //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 I(S)n+E RandomAccessFile oSavedFile; Cn_$l> long nPos; Iu{kPyx XTd3|Pm I"1;|`L~: public FileAccessI() throws IOException @&"Pci+-| { jM&r{^( this("",0); i[ $0a4 } >5wx+n)/) fi+R2p~vs ~h"/Tce public FileAccessI(String sName,long nPos) throws IOException 4Td{;Y="yF { :aG#~-Q oSavedFile = new RandomAccessFile(sName,"rw"); 5'Q|EIL this.nPos = nPos; .>(Q)"v oSavedFile.seek(nPos); 1RKW2RCaW_ } :0/q5_t siTX_`0 c,Euv>*` public synchronized int write(byte[] b,int nStart,int nLen) vm'5s]kdh { @ w>zF/ int n = -1; WsFk:h'r try{ up2+s# oSavedFile.write(b,nStart,nLen); (Z}>1WRju n = nLen; nkv(~ej( } @vMA=v7a catch(IOException e) kqb0>rYa { 9
C{;h e.printStackTrace (); 4G@nZn } \j2;4O?` h b/]8mR NjE</Empb% return n; v?c 0[+? } g}f9dB,F Bk}><H dtPoo\@ } "Pl9 nE >3gi yeJ GdVhK:<> /* `]v[5E **SiteInfoBean.java )>7%pz */ o&hIHfZri package NetFox; Jd,)a#<j f1PN| >\ u<&>i public class SiteInfoBean { }YOL"<,:o ~Z ~v 1 ^g
t1o private String sSiteURL; //Site's URL |+U<S~ private String sFilePath; //Saved File's Path HP.E3yYK private String sFileName; //Saved File's Name +Ug/rtK4 private int nSplitter; //Count of Splited Downloading File gq"k<C0 iU+nqY' aS}1Q?cU public SiteInfoBean() &t(0E:^TRU {//nSplitter的缺省值为5 # tdf>? //default value of nSplitter is 5 ^+SkCO this("","","",5); PS
S?|Vk } 'O6]0l Gq#~vr ,uz ]V1 public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) U6[ang'l { ?4G|+yby sSiteURL= sURL; Zs2-u^3& sFilePath = sPath; I =Wc&1g sFileName = sName; %g]vxm5? this.nSplitter = nSpiltter; qpJ{2Q t!1$$e?`r 7*w VI+ } $ XBAZ<"hd }%TSGC4{ OndhLLz public String getSSiteURL() `N/RHb% { 6+K_ Z\ return sSiteURL; ]=73-ywn] } d {2 mgZf3?,) 1x~U*vbhQ public void setSSiteURL(String value) zVv04_: { jy2IZ o sSiteURL = value; /cFzotr"9 } Fk=}iB#( Hqz?E@bc@ O)R(==P26P public String getSFilePath() rC[6lIP { 8iC:xcN3 return sFilePath; w(nHD*nm } N"[B=fU}
,%# EA<}[4#jS public void setSFilePath(String value) |r RG=tG_' { ]7AX%EG3 sFilePath = value; ^4v*W;Q } T_<BVM c:M$m3Cs? 02JL* public String getSFileName() vOI[Z0Lq9h { N?4q return sFileName; RAs0]K } io4A>>W==/ tZWrz
e^ Fs/? public void setSFileName(String value) IxDWJ#k { zGcqzYbuA sFileName = value; (3,.3)%` } &B{8uge1 |-2}j2' IF
k public int getNSplitter() &217l2X
/ { `BZ&~vJ_ return nSplitter; |I[7,`C~ }
'3l$al:H^ $<?X7n^ @=]8^?$t
0 public void setNSplitter(int nCount) KT*:F(4` { X}4}& nSplitter = nCount; -[#n+`M } ~bA,GfSn0 } _.18z+ SjcL#S($&Y BZ+-p5]- /* r;cV&T/?
**Utility.java R
-elIp */ :_dICxaLZT package NetFox; K3$`
Kv>I _EYB
8e #'o7x'n^ public class Utility { *8g<R ]Nk!4" {gy+3
public Utility() q{4|Kpx@ { fJ80tt?r %EbiMo ]3B :9d\Uj, } ZKbDp~ V/#v\*JHFc //线程睡眠 CSn<]%GL public static void sleep(int nSecond) .5tg4%l { X1J;1hRUP try{ Bmr<O! Thread.sleep(nSecond); *crw^e } ')PVGV(D+ catch(Exception e) !r&Bn6* { \%_ZV9cKF e.printStackTrace (); r)l` } nTnRGf\T } )BV=|,j wgd<3 X //日志 B1T5f1;uY public static void log(String sMsg) =d20Xa { pz}mF D&[ System.err.println(sMsg); #+sF`qR, } 0-e M23&<}Q8 nX
x=1*X public static void log(int sMsg) iK}v`xq { H*U` System.err.println(sMsg); z&'f/w8 } f~gSJ<t4 } Z$2L~j"=! w6,*9(;$Pk 6&!l'[hU /* (.^8^uc7X **TestMethod.java [ #]jC[ */ z%2w(&1 package NetFox; wL
eHQ] !]DuZ= )bW<8f2 public class TestMethod { X=_Z(;<& (wL3 + X5E
'*W public TestMethod() i-13~Dk { ///xx/weblogic60b2_win.exe !UNNjBBP7 try{ ^8742. SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); <?|6*2_= //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); i:Mc(mW SiteFileFetch fileFetch = new SiteFileFetch(bean); lBiovT fileFetch.start(); ep?:;98|t } $N\+,? catch(Exception e){e.printStackTrace ();} M/w{&& gX/NtO% EzP#Mnz^ } bXl8v lP0k: iSd?N}2,I public static void main(String[] args) m`9^.>]P { kMS5h~D[ new TestMethod(); 0eA5zFU7 } b>=7B6 Aw } m3?e]nL4W 点击下载更多相关资料
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