-
UID:2537
-
- 注册时间2006-05-09
- 最后登录2020-05-29
- 在线时间3小时
-
- 发帖8
- 搜Ta的帖子
- 精华
0
- 铜板1641
- 人品值95
- 贡献值0
- 交易币0
- 好评度8
- 信誉值0
- 金币0
-
访问TA的空间加好友用道具
- 发帖
- 8
- 铜板
- 1641
- 人品值
- 95
- 贡献值
- 0
- 交易币
- 0
- 好评度
- 8
- 信誉值
- 0
- 金币
- 0
- 所在楼道
|
/* i<!1s%i} **SiteFileFetch.java w}U'>fj */ x5k6"S"1, package NetFox; )Ut9k import java.io.*; j3fq}>= import java.net.*; ]3
76F7 @DlN;r?Cv '\P+Bu]6& public class SiteFileFetch extends Thread { 58]t iP" q)N^ Er|j\(jM SiteInfoBean siteInfoBean = null; //文件信息Bean 8<
"lEL| long[] nStartPos; //开始位置 ;pG5zRe long[] nEndPos; //结束位置 Fu65VLKh FileSplitterFetch[] fileSplitterFetch; //子线程对象 8O0]hz long nFileLength; //文件长度 nbBox,zW boolean bFirst = true; //是否第一次取文件 y27MG boolean bStop = false; //停止标志 +u3vKzD File tmpFile; //文件下载的临时信息 pz]KUQ DataOutputStream output; //输出到文件的输出流 <q=]n%nX v>5TTL~? //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) ~zFwSF public SiteFileFetch(SiteInfoBean bean) throws IOException c1 1?Kq { \7Fp@ .S3 siteInfoBean = bean; MpJ]1 //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); "F?p Y@4 tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); |al'_s}I if(tmpFile.exists ()) zS `>65}e { > (W\Eh{J bFirst = false; *7C l1o read_nPos(); bK|nxL } uP1]EA else `)M&^Z=D { h YVy 65Ea nStartPos = new long[bean.getNSplitter()]; 1r<'&f5 nEndPos = new long[bean.getNSplitter()]; 6\m'MV`R! } &zHY0fxX fjHd"!)3 )SfM `W)Y 1t7T\~+F } o3.b='HAm 87hU#nVYh sd
|c/ayh~ public void run() Q'rX ]kk_ { XW*d\vDun //获得文件长度 1(/rg //分割文件 I} \`l+ //实例FileSplitterFetch !~]'&9 //启动FileSplitterFetch线程 on f7V //等待子线程返回 U)SQ3*j2D try{ :D:J_{HJ if(bFirst) ;RW5XnVx { dDqT#N?Y nFileLength = getFileSize(); Z`ZML+;~6 if(nFileLength == -1) XpdjWLO]C< { $~T|v7Y% System.err.println("File Length is not known!"); 2l +t- } sfC/Q"Zs else if(nFileLength == -2) #ihHAiy3 { uC"Gm;0 System.err.println("File is not access!"); 8e_9u@p+w } {QIdeB[ else ]GzfU'fOn| { wArzMt}[ for(int i=0;i<nStartPos.length;i++) OJs
s { _j]vR nStartPos = (long)(i*(nFileLength/nStartPos.length)); _+qtH< F/ } V/J-zH& for(int i=0;i<nEndPos.length-1;i++) 4x" je { R'aA\k- nEndPos = nStartPos[i+1];
bRx}ih } Bacmrf nEndPos[nEndPos.length-1] = nFileLength; n;r
W } lv&y<d; } m!:sDQn{3 =]-D_$S~ uD:tT~ //启动子线程 W 6CNMI] fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 8[u$CTl7a for(int i=0;i<nStartPos.length;i++) SOvo%L@ { uD4$<rSHb fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), l6-%)6u> siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), ExSy/^4f nStartPos,nEndPos,i); 27UnH: = Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); :qvaI, fileSplitterFetch.start(); A )xfO- } Uy$?B"Z // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), 9j$ J}=y siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); s5oU // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", yu=(m~KX
nEndPos = " + nFileLength); Y NG S"3F // fileSplitterFetch[nPos.length-1].start(); D=~3N {Pe+d3Eoo bYy7Ul6] //等待子线程结束 Bmi9U //int count = 0; b IZi3GmRF //是否结束while循环 2%@<A boolean breakWhile = false; &MGM9
zm-] g;!,2,De} CK1gzIg> while(!bStop) /XwwB { jn>RE write_nPos(); 0zXF{5Up Utility.sleep(500);
ljjnqQ% breakWhile = true; t<znz6 }E\u2] u]Dds;~"b for(int i=0;i<nStartPos.length;i++) tN&X1 { ;h7O_|<% if(!fileSplitterFetch.bDownOver) E^t}p[s { !{ /AJb breakWhile = false; G4)X~.Fy break; e `Tssa+ } O+o_{t\R } =kn-F T if(breakWhile) r#WAS2.TP break; q#.+P1"U 41\V;yib 1lf]}V //count++; w(nQ:;oC //if(count>4) Y !AQ7F // siteStop(); 7)y
+QU] } ]f3R;d KJ8Qi+cZ 8\CmM\R System.err.println("文件下载结束!"); :tBZu%N/N } 4z!(!J) catch(Exception e){e.printStackTrace ();} [HQ Bx`3TS } yx/.4DW1Ua 1#^r5E4 n }4L q^$ //获得文件长度 _u8d`7$*% public long getFileSize() 1fU~&?&-u { '0/[%Q int nFileLength = -1; 4GqE%n+ta~ try{ ri1:q.:I] URL url = new URL(siteInfoBean.getSSiteURL()); Iih]q HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); ^|=3sJ4[U httpConnection.setRequestProperty("User-Agent","NetFox"); 3Uni{Z]Q) pc/]t^]p Q#*Pjl int responseCode=httpConnection.getResponseCode(); %1e{"_$O9 if(responseCode>=400) hOIk6}r4X { )n1 7}Qm`V processErrorCode(responseCode); "6o5x&H return -2; //-2 represent access is error C/A~r } ah0 "QCVi R y7Y g$)sL String sHeader; %B-m- =gz f7j9'k 2?\L#=<F for(int i=1;;i++) "SN+ ^` { VtJyE} //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); i{6wns?KMj //Utility.log(in.readLine()); D^\2a;[AxA sHeader=httpConnection.getHeaderFieldKey(i); 2V =bE- if(sHeader!=null) ;U$EM+9 { ]$?\,` if(sHeader.equals("Content-Length")) f)!7/+9> { FK.Qj P: nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); P};GcV- break; \x+ "1 } ajALca4 } g'1ASMuR else \9s x_T break; RaLc}F)9 } 6T{SRN{ } (Y$48@x catch(IOException e){e.printStackTrace ();} Shb"Jc_i catch(Exception e){e.printStackTrace ();} qn|~z@" };@J)} DU1\ K Utility.log(nFileLength); P0XVR_TJf b#E!wMClS xEvm>BZi
return nFileLength; T&~7*j(|e } xl;0&/7e c %.vI \h 1 T/_4 //保存下载信息(文件指针位置) B5fF\N^ private void write_nPos() {>R'IjFc {
e&J_uG try{ YUsMq3^& output = new DataOutputStream(new FileOutputStream(tmpFile)); m kHcGB!~ output.writeInt(nStartPos.length); 3Mt Alc0xp for(int i=0;i<nStartPos.length;i++) UV8K$n< { W05>\Rl // output.writeLong(nPos); N"rZK/@} output.writeLong(fileSplitterFetch.nStartPos); (YH/#n1"{ output.writeLong(fileSplitterFetch.nEndPos); (GI]Uyn }
Y+'522er output.close(); gtV*`g } zCdzxb_h" catch(IOException e){e.printStackTrace ();} >gLLr1L\ catch(Exception e){e.printStackTrace ();} N_),'2 } Ig M_l= <tp#KZE u.Z,HsEO b //读取保存的下载信息(文件指针位置) @O%d2bgEWV private void read_nPos() ;IYH5sG{ { KK4"H]!. try{ .WT^L2l% DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); |8YP8o int nCount = input.readInt(); a#G]5TZ nStartPos = new long[nCount]; Ps_q\R nEndPos = new long[nCount]; Z-B b,8 for(int i=0;i<nStartPos.length;i++) K{x FhdW { +Jv*u8T' nStartPos = input.readLong(); C^ hCT nEndPos = input.readLong(); DR w;.it2 } Oe[qfsdW input.close(); jJDYl( [ } .&Ok53]b catch(IOException e){e.printStackTrace ();} xRU ~hQ catch(Exception e){e.printStackTrace ();} yL>wCD,L } t=Um@;wh ,t=12R]> ZT'Sw%U: private void processErrorCode(int nErrorCode) X0"f>.Lg { +|=5zWI/ System.err.println("Error Code : " + nErrorCode); 7yK1Q_XY> } wu2C!gyBo `Ufv,_n 2>bV+[@B //停止文件下载
#RA3 T[A public void siteStop() ~8
w(M { M?fRiOj bStop = true; /K@{(=n for(int i=0;i<nStartPos.length;i++) }.R].4gT fileSplitterFetch.splitterStop(); (&a<6k WgK |r~ :xP$iEA`G } w(xRL#% } N2x!RYW //负责部分文件的抓取 Vt!<.8&` **FileSplitterFetch.java e;/C}sK: */ IAJYD/Y&? package NetFox; A->y#KQ ax)j$ :9Vd=M6, import java.io.*; +e6c4Tw/ import java.net.*; ;dh8|ujh \O7Vo<B&D }lzQMT public class FileSplitterFetch extends Thread { K9J"Q4pEC fx783 k-LT'>CWl String sURL; //File URL V^U1o[` long nStartPos; //File Snippet Start Position i!=28|_ long nEndPos; //File Snippet End Position ?98]\pI
int nThreadID; //Thread's ID Dxwv\+7] boolean bDownOver = false; //Downing is over U8b1
sz boolean bStop = false; //Stop identical J '^xDIZX FileAccessI fileAccessI = null; //File Access interface b:iZ.I 9A4h?/ @-ma_0cZQ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException /@.c
59r { !^|%Z this.sURL = sURL; VnJ-nfA this.nStartPos = nStart; vsM] <t this.nEndPos = nEnd; !j3V'XU#Zn nThreadID = id; yT>t[t60/S fileAccessI = new FileAccessI(sName,nStartPos);//定位 L#`9# Q } v0dFP0.;& f~.w2Cna /~LXY<-( public void run() u%7a&1c { hCLXL while(nStartPos < nEndPos && !bStop) QxGQF| { p]zYj >e i~IQlyGr. B9Dh^9?L try{ Qw$"W/&X URL url = new URL(sURL); r $du-U HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); FBGHVV
w! httpConnection.setRequestProperty("User-Agent","NetFox"); x,Cc$C~YP String sProperty = "bytes="+nStartPos+"-"; `FImi9%F httpConnection.setRequestProperty("RANGE",sProperty); e<>Lr Utility.log(sProperty); @J~y_J{ G@)I )6?.; B InputStream input = httpConnection.getInputStream(); 5g-apod //logResponseHead(httpConnection); vl@t4\@3 1 ]@}+H 9@yP;{Q byte[] b = new byte[1024]; bw7!MAXd int nRead; LC/w".oq? while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) sK:,c5^ { {I|k@ nStartPos += fileAccessI.write(b,0,nRead); 8i;N|:WdH //if(nThreadID == 1) v}IP%84 // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos);
:*M\z3`k } ;UgRm# L-d8bA 0NSn5Hq Utility.log("Thread " + nThreadID + " is over!"); $p4aNC bDownOver = true; {zGIQG9 //nPos = fileAccessI.write (b,0,nRead); OvPy+I } V=|^r? catch(Exception e){e.printStackTrace ();} >:]fN61# } xQ7n$.?y@ } K]bS:[34 R We]X+>BlO ~MY(6P //打印回应的头信息 cLlfncI public void logResponseHead(HttpURLConnection con) s\&_Kbw]c { Q;P ~' for(int i=1;;i++) &,Q{l$`X { fBH&AO$Q String header=con.getHeaderFieldKey(i); skcMGEB if(header!=null) R7KQ-+Zb //responseHeaders.put(header,httpConnection.getHeaderField(header)); (Df<QC`0v Utility.log(header+" : "+con.getHeaderField(header)); bq4H4?j else 'w%N(N tq break; JMOP/]%D } 7/vr!tbL`p } ?E2k]y6< ^BM/K&7^ %:o@IRTRU public void splitterStop() +^+wS`Y { (W/jkm bStop = true; DuvP3(K } BH0rT}) MatC2-aV1 BHmA*3? } W7A'5 4Sg!NPuu7&
cM4?Ggn /* vP}K(' ( **FileAccess.java oQ;f`JC^ *//文件访问(定位,写) +$>ut
r package NetFox; ):78GVp import java.io.*; 5 J|;RtcR gSj-~kP o33{tUp' public class FileAccessI implements Serializable{ +lha^){ GIVs)~/Eq //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 z% /ww7H RandomAccessFile oSavedFile; !T,7 long nPos; *A\NjXJl~ 0HD1Ob^@ ap%o\&T; public FileAccessI() throws IOException ]bnxOk { Y)u}+Yg this("",0); SbnVU[ } 3}:pD]`h C6"!'6 W _z4rx public FileAccessI(String sName,long nPos) throws IOException K[sM)_I { ?XOeMI oSavedFile = new RandomAccessFile(sName,"rw"); T%a]3 this.nPos = nPos; j|G-9E oSavedFile.seek(nPos); oZCi_g 5i } g41Lh3dj gy =`c MS@ ` 4EOy:a
public synchronized int write(byte[] b,int nStart,int nLen) z~
u@N9M { !RcAJs' int n = -1; T (2,iG8 try{ Mqh~ 5NM oSavedFile.write(b,nStart,nLen); F[=m|MZb n = nLen; |C&eH$?~=R } Xi{(1o4% catch(IOException e) 8&C(0H]1 { EhFhL4Xdn e.printStackTrace (); #8z\i2I } d}o1 j `f'q / 78QFaN$ return n; ?3Jh{F_+ } }"&(sYQ*` Ro1' L1:
^,KR 0 } FoG<$9 5nj~RUK b<( W}$x /* zBs7]z!eP **SiteInfoBean.java W"-nzdAJ5 */ KncoIw package NetFox; 'j)eqoj D1Sl+NOV 'j3'n0o public class SiteInfoBean { P~qVr#eU &"kx(B 0 j.Sb2 private String sSiteURL; //Site's URL JZXc1R| 9 private String sFilePath; //Saved File's Path Ksp;bfe private String sFileName; //Saved File's Name "
}ZD)7K private int nSplitter; //Count of Splited Downloading File !>:tF,fcB =5|5j!i=q j>b OnCp~ public SiteInfoBean() r#Fu<so, {//nSplitter的缺省值为5 qJ/C*Wqic //default value of nSplitter is 5 8Cqs@<r4Od this("","","",5); "|G,P-5G" } ^]DWrmy @Hf}PBb k`AJ$\= public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) >gSerDH8\ { ~+np7 sSiteURL= sURL; ".0W8= sFilePath = sPath; H\k5B_3OU sFileName = sName; >eTlew<5 this.nSplitter = nSpiltter; CbHNb~ <M7*N. j%}Jl } 0@Ijk(| |d 3agfS[n *Z:PB%d5 public String getSSiteURL() "XY?v8*c { +n, BD C; return sSiteURL; w?tKL0c } o/zCXZnw# X2uX+}h*tA
[dJ\|= public void setSSiteURL(String value) 4r. W:}4: { 19.cf3Dh sSiteURL = value; $;CC
lzw } kUUq9me&o #~x5}8 *[5 public String getSFilePath() tAA7 { 5 q , return sFilePath; cMl%)j- } vOK;l0% xB(:d'1| x]ti3?w public void setSFilePath(String value) ,2TqzU; { Y2X1!Em>B sFilePath = value; S>,I&`yi } &FrB6y 9^ r C'._}\nX public String getSFileName() iW?9oe { JLu0;XVK return sFileName; Ln_l>X6j51 } j1F+, %-l:_A
PBL^xlg public void setSFileName(String value) +_eb*Z`5o { xiF%\#N sFileName = value; )!d1<p3 } s.sy7%{ 17cW8\
'u[o`31. public int getNSplitter() sPg6eAd~? { k^pu1g=6I return nSplitter; >p*HXr|o$ } 42CMRGv uC(S`Q[Bg N
>!xedw= public void setNSplitter(int nCount) [bv@qBL { 9@Sb! 9h nSplitter = nCount; %20-^&zZ } n6G&^Oj } =BS'oBn^6 XQOprIJ
U SSLshY~d /* ^qx\ e$R **Utility.java a{*'pY(R0$ */ Z5Ihc%J^ package NetFox; dCP Tpm s7o*|Xv #`4^zU) public class Utility { t4@g;U?o 6\Vu#r MNqyEc"" public Utility() g
u =fq\` { \hW73a! eH955[fVd4 A9UaLSe } !>y}Xq{bm3 +)JqEwCrq //线程睡眠 |u ;BAb public static void sleep(int nSecond) /JeqoM"x { W<91m* try{ &PuJV + y Thread.sleep(nSecond); 3cO[t\/up } +g6j=% catch(Exception e) bM^A9BxD { \a2oM$PX e.printStackTrace (); GFdJFQio } sK-|xU. } jL+}F /~r 'uACoME@ //日志 hav?mnVJ public static void log(String sMsg) N#['fg' { ~_db<!a System.err.println(sMsg); *rz(}(r } Gd6 ;'ZCmY 7Y|>xx=v $a*Q).^ public static void log(int sMsg) c9TAV,/fF* { D2:a System.err.println(sMsg); 0aTbzOn& } G\N"rG = } 7]xz8t qm8n7Z/ C.)&FW2F_ /* Bb[e[,ah **TestMethod.java gDNTIOV */ _K}_h\e. package NetFox; 5m USh3 ^xw [d}0S
e1^{ public class TestMethod { Gx_`|I{P RrU~"P1C k\&IFSp public TestMethod() <<On*#80w
{ ///xx/weblogic60b2_win.exe 0S:!Gv+ try{ qVD!/;l SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); <6b\i5j //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); {9.~]dI|L SiteFileFetch fileFetch = new SiteFileFetch(bean); 7R<u=U fileFetch.start(); Ed&,[rC } Na 9l# catch(Exception e){e.printStackTrace ();} $
lsRg:J h}`&]2|] Pv %vx U } KT;C RO> 2@m(XT
( v8[ek@ public static void main(String[] args) b|ksMB>) { &Wv`AoV new TestMethod(); "o# )vA` } ssX6kgq_( } @)Hbgkdi 点击下载更多相关资料
|