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/* eX@v7i,} **SiteFileFetch.java T:6K?$y? */ `ReGnT[ package NetFox; 9p4%8WhJ import java.io.*; },v&rkwR import java.net.*; Enu!u~1]F 'H!V54
\j TqXge{r public class SiteFileFetch extends Thread { W oWBs)E FN>L7
*,0 df^0{gNHx SiteInfoBean siteInfoBean = null; //文件信息Bean _TrZ'iL}T long[] nStartPos; //开始位置 N6WPTUQ1mF long[] nEndPos; //结束位置 }a'cm!" FileSplitterFetch[] fileSplitterFetch; //子线程对象 . Jptj long nFileLength; //文件长度 )O9f hj) boolean bFirst = true; //是否第一次取文件 WqR7uiCi boolean bStop = false; //停止标志 lS#7xh File tmpFile; //文件下载的临时信息 X:U=MWc> DataOutputStream output; //输出到文件的输出流
}\>+H H<$pHyxU //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) x\6];SXX public SiteFileFetch(SiteInfoBean bean) throws IOException o>.AdZby { <r_3obRC siteInfoBean = bean; MCM/=M'y //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 9uKOR7.zbo tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); #jOOsfH|k if(tmpFile.exists ())
\|blRm; { 28ja-1dB bFirst = false; gU~
L@R_D read_nPos(); >CH } "oHp.$+K else '^e0Ud, { hI*`> 9l nStartPos = new long[bean.getNSplitter()]; |y klT nEndPos = new long[bean.getNSplitter()]; b/z'`?[ } _a fciyso ijE<spG CcBQo8!G
ccRlql( } gAj0ukX5 9U&~(; 3\,MsoAl public void run() =[ s8q2V { @51z-T //获得文件长度 33*^($bE& //分割文件 XMomFW_@ //实例FileSplitterFetch KuIkul9^% //启动FileSplitterFetch线程 93 [rL+l.Y //等待子线程返回 y2U/$%B)G try{ :2 _0L if(bFirst) y:~eU { ,|6Y\L nFileLength = getFileSize(); oN_S}o
if(nFileLength == -1) #,t2*tM { ?Y%}(3y System.err.println("File Length is not known!"); w8G7Jy } sf
fV.cC` else if(nFileLength == -2) "v@);\-V { @8QFP3\1 System.err.println("File is not access!"); R_t~UTfI; } &Q2NU$ else yVT&rQ"{ { pi|\0lH6W for(int i=0;i<nStartPos.length;i++) ]gb _Nv { cZ6?P`X nStartPos = (long)(i*(nFileLength/nStartPos.length)); NAJ '><2 } :b.3CL\.6 for(int i=0;i<nEndPos.length-1;i++) a:=q8Qy { $[)6H7!U) nEndPos = nStartPos[i+1]; |Uc<;> l } X";TZk nEndPos[nEndPos.length-1] = nFileLength; "w>rlsT<O } tX@0:RX% } 4 U3C~J Tw2Xe S =g/4{IL% //启动子线程 :8](&B68gE fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; -K:yU4V for(int i=0;i<nStartPos.length;i++) Y=AH%Gy9) { >/(i3) fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), AqKHjCI siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), -b@v0%Q2M* nStartPos,nEndPos,i); E7V38Z Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); MomLda
V9Q fileSplitterFetch.start(); k}- "0> } mfj4`3:NV // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), lq; siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); /7c2OI=\ // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", mk#>Dpy? nEndPos = " + nFileLength); r3n=<l!Jr // fileSplitterFetch[nPos.length-1].start(); UAnB=L,.\
fn4= ~C%2t{" //等待子线程结束 f+*J
ue //int count = 0; Rbx97(wK //是否结束while循环 QIR4<]/ boolean breakWhile = false; U*
-% M `2Wl >L#];| while(!bStop) aeEw# { OG0r4^6Ly write_nPos(); ^RY n8I Utility.sleep(500); lF0K=L breakWhile = true; d\v$%0 elN{7: 9yh9HE for(int i=0;i<nStartPos.length;i++) suA+8}o] { :({-0&&_ if(!fileSplitterFetch.bDownOver) Ll008.# { r~8D\_=s breakWhile = false; N!tpzHXw break; jjJc1 p0 } @WhZx*1 } *jYHd#UZx4 if(breakWhile) k)?,xY\AV break; <9Lv4`]GU5 O<}ep)mr r~ZS1Tp //count++; b=6MFPbg //if(count>4) SZCF3m&pz // siteStop(); LEYWH%y } %1Vu=zCAW !7ei1 ( rA\_FOJ System.err.println("文件下载结束!"); Mfnlue]( } OpW eW catch(Exception e){e.printStackTrace ();} J xA^DH } UN
cYu9[ xI=}z AZh@t?) //获得文件长度 utYnaeQcn public long getFileSize() P5'iYahCq_ { 6Cz7A int nFileLength = -1; t/l! KdY$ try{
FY1},sq URL url = new URL(siteInfoBean.getSSiteURL()); sN}s61 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); <'PR;g^# httpConnection.setRequestProperty("User-Agent","NetFox"); 2rK-X_} h
Jfa_ o|R*POM int responseCode=httpConnection.getResponseCode(); "Y"t2l_n if(responseCode>=400) FK4nz2&4 { '5|Q<5!o processErrorCode(responseCode); CL)1Q return -2; //-2 represent access is error Ss"|1]acP } &"U9X"8b zWCW: dI V_)5Af3wY String sHeader; ^CowJ(y( }-REBrb- -/(DPx for(int i=1;;i++) !Iw{Y' { c!'A)JD@ //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); )GiFkG //Utility.log(in.readLine()); p)?qJ2c| sHeader=httpConnection.getHeaderFieldKey(i); K7t&fDI if(sHeader!=null) mF6@Y[/B { *G%1_ if(sHeader.equals("Content-Length")) (SgEt { %JP&ox|^& nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); /0B07B break; no~O R Q } 4kW30Ma } wx]+*Lzz else c,#~L7 break; J~_L4*Jw } }m=tzHB* } 9[epr+f catch(IOException e){e.printStackTrace ();} Jcwh|w9D8 catch(Exception e){e.printStackTrace ();} Zu2m%=J` 9IS1.3 @{J!6YGh Utility.log(nFileLength); x&hvFG3 Hrd5p+j {
4_I7r return nFileLength; d-6sC@PB } ,wwU`
U ..P=D <'f Zd[y+$> //保存下载信息(文件指针位置) 2.fyP"P
L private void write_nPos() TIK/ %T { A%NK0j$;} try{ `l[6rf_. output = new DataOutputStream(new FileOutputStream(tmpFile)); 1S*8v 7 output.writeInt(nStartPos.length); "4Vi=* 2V for(int i=0;i<nStartPos.length;i++) p6&LZ=tL3 { htUy2v#V // output.writeLong(nPos); h/0<:eZ* output.writeLong(fileSplitterFetch.nStartPos); J)7,&Gc6 output.writeLong(fileSplitterFetch.nEndPos); p=8M0k } I2t-D1X output.close(); p\\P50(- } EuKrYY] g catch(IOException e){e.printStackTrace ();} ;#5-.z catch(Exception e){e.printStackTrace ();} UA69_E{JCH } )#b}qc#` _/QKWk&j *([0" //读取保存的下载信息(文件指针位置) boC>N private void read_nPos() h3UZ|B0= { 'NQMZfz try{ p?Z+z DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); %:'1_@Ot2 int nCount = input.readInt(); @!L@UP0 nStartPos = new long[nCount]; t7C!}'g&' nEndPos = new long[nCount]; 4*N@=v for(int i=0;i<nStartPos.length;i++) [3{:H"t { /?.r!Cp nStartPos = input.readLong(); _H^^2#wc/ nEndPos = input.readLong(); HobGl0<y } N[+o[%A input.close(); |? ;"B:0 } ohQz%?r catch(IOException e){e.printStackTrace ();} YO.`l~ v catch(Exception e){e.printStackTrace ();} Y5h)l<P>B } ]HNT(w@ F- !}dzO *7xQp!w^ private void processErrorCode(int nErrorCode) )9A<fwpN { fw(j6:p System.err.println("Error Code : " + nErrorCode); MYDf`0{$_a } jt'Y(u]2 S+_A
<p 4t+/ //停止文件下载 O)$N}V0 public void siteStop() WQIM2_=M { tK s4}vW bStop = true; eu}:Wg2 for(int i=0;i<nStartPos.length;i++) i
h`y0(< fileSplitterFetch.splitterStop(); Pjj;.c 7_j Pq{YZMr 26('V `N } evndw> } ^huBqEs //负责部分文件的抓取 ^V XXq **FileSplitterFetch.java n7`.<*:
*/ "EOk^1,y package NetFox; eSvc/ CU ~u?x{[ :r
vO8.\ import java.io.*; z/P^-N> import java.net.*; A_6/umF[ZA
FM;;x(sg 0f=N3) public class FileSplitterFetch extends Thread { NSiYUAug 6bRQL}[ k<j)?_=` String sURL; //File URL T|BY00Sz` long nStartPos; //File Snippet Start Position *mK);@pL long nEndPos; //File Snippet End Position *s<dgFA' int nThreadID; //Thread's ID Vne.HFXA boolean bDownOver = false; //Downing is over 72s$ boolean bStop = false; //Stop identical %Zl_{Q]h FileAccessI fileAccessI = null; //File Access interface fUL{c,7xda U"%8"G0) 35@Ibe~ public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException e%@[d<Ta\ {
4s1kZ`e this.sURL = sURL; M$>WmG1~D this.nStartPos = nStart; 1^WA this.nEndPos = nEnd; &t.>^7ELF nThreadID = id; 8&2gM fileAccessI = new FileAccessI(sName,nStartPos);//定位 0()9vTY+ }
Skk3M? VvMU) tI!R5q;k public void run() bb
O;AiHD {
6>N u=~ while(nStartPos < nEndPos && !bStop) 93Ci$#<y { ,39$iHk zhR_qW+ x9&tlKKxf try{ *Y^Y URL url = new URL(sURL); *\~kjZ 3 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); 66"ZH,335 httpConnection.setRequestProperty("User-Agent","NetFox"); {C0OrO2: String sProperty = "bytes="+nStartPos+"-"; j_ywG{Jk httpConnection.setRequestProperty("RANGE",sProperty); 2fL88/' Utility.log(sProperty); I8-&.RE k+m_L{#m5 *> &N
t InputStream input = httpConnection.getInputStream(); w_z^5\u0 //logResponseHead(httpConnection); bbPd&7 i_ODgc`H 1Z$99 byte[] b = new byte[1024]; =|{,5=" int nRead; w3?t})PB& while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) Kz*AzB
{ }&C!^v
o nStartPos += fileAccessI.write(b,0,nRead); HU'`kimWb //if(nThreadID == 1) [%)B%h`XGf // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); KbuGf$Bv } gx>mKSzy #35S7G^ @` BI]ut|Qw Utility.log("Thread " + nThreadID + " is over!"); ~cg+BAfu bDownOver = true; W*/s4 N //nPos = fileAccessI.write (b,0,nRead); ?BWvF]p5/ } _^2[(<Gmv catch(Exception e){e.printStackTrace ();} $85o%siS' } [>]VN)_J5 } u2.r,<rC*Q 2S10j%EeI @Qsg.9N3K //打印回应的头信息 &40JN} public void logResponseHead(HttpURLConnection con) G'}_ZUy# { &LxzAL,3! for(int i=1;;i++) /jL{JF>I { RVKaqJ0e< String header=con.getHeaderFieldKey(i); ^%OH}Z `ly if(header!=null) K/.hJ //responseHeaders.put(header,httpConnection.getHeaderField(header)); X)R]a]1A Utility.log(header+" : "+con.getHeaderField(header)); r`E1<aCr| else 4oaP"T@6 break; {ZIFj.2 } Mp@(/ } ,E8>:-boL Y"\T*lKa 9q@YE_ji public void splitterStop() (XIq?c1T { fvBC9^3 bStop = true; zl8\jP } ?28GQyk4 >dC(~j{ b%~3+c } ZT-45_ VflPNzixb! b+j_EA_b /* m&z%kVsg] **FileAccess.java 7;s0m0<%~ *//文件访问(定位,写) :)V0zHo&( package NetFox; au}0PnA; import java.io.*; u$/2XO ib=^tK @U.}Ei public class FileAccessI implements Serializable{ m=l3O:~J tlxjs]{0E //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 kd4*Zab RandomAccessFile oSavedFile; +n~rM'^4/ long nPos; 9M~$W-5 Pg8= 8}`8lOE7 public FileAccessI() throws IOException .Fz6+m;Z { G.E~&{5xQ this("",0); Hf]}OvT>Z } AA%g^PWpR S@2Jj>3D? NeZYchR public FileAccessI(String sName,long nPos) throws IOException F4{. 7BT { 7ofH@U oSavedFile = new RandomAccessFile(sName,"rw"); \^W? this.nPos = nPos; (']z\4o oSavedFile.seek(nPos); exN#!&;
} oW1olmpp= D~?*Xv]s~ n[S*gX0 public synchronized int write(byte[] b,int nStart,int nLen) 7XC}C+ { pQ`L=#WM int n = -1; >;U%~yy}qc try{ q9z!g/,d/ oSavedFile.write(b,nStart,nLen); zyn =Xv@p n = nLen; B-p5;h> } =<uz'\Ytv% catch(IOException e) 90696v. { GIl{wd
e.printStackTrace (); f!Nc+ } ;HwJw\fo T
]nR
XW$ Vw@x return n; 8r| } :H:}t>X6Vo 5{f/H]
P zw:b7B] } zYJ`.,#C 5 a9JJuSRC Vk=<,<BB /* Vx8.FNJh **SiteInfoBean.java KEB>}_[ */ /FZ )ej\ package NetFox; j|8{Vyqd 7uH{UpslJ nE$ V<Co} public class SiteInfoBean { d"uM7PMs7x 05zdy-Fb |}Z"|-Z private String sSiteURL; //Site's URL znpZ0O\! private String sFilePath; //Saved File's Path zq>"a&Y, private String sFileName; //Saved File's Name g[)hm`{? private int nSplitter; //Count of Splited Downloading File 5W'|qmJ WZ-{K"56 Ybiz]1d public SiteInfoBean() A^7Zy79 {//nSplitter的缺省值为5 `erQp0fBM //default value of nSplitter is 5 .f<,H+ m^ this("","","",5); /P}tgcs } :iiTz$yk bvvx(?! ptfADG public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) itMc!bUQ { G2k71{jK sSiteURL= sURL; 8j+;Xlh sFilePath = sPath; Rzj!~`&N sFileName = sName; {]N?DmF this.nSplitter = nSpiltter; [NDYJ'VGe 3+PM_c)Y OtqLigt&l } \K=PIcH IUG.q8 Efd[ZJxS6 public String getSSiteURL() `G{t<7[[; { ~/[N)RFD return sSiteURL; ds[~Cp } A|nU
_* -<.NEV }+3~y'k public void setSSiteURL(String value) 2Rt ZTn { @3D%i#2o&[ sSiteURL = value; zOp"n\ } (jMp`4P CBHWMetJ* Ghe=hhZ public String getSFilePath() (acRYv( { 8\_,Y
ji return sFilePath; I9 aber1 } l,8|E wpmtv325 J(L$pIM public void setSFilePath(String value) p 1fnuN |, { 3P>@ : sFilePath = value; Dn!V)T } Fm{y.URo
|mX8fRh pswppC6f public String getSFileName() $nN$" { }e w?{ return sFileName; _"TG:RP } =]Bm>67" =^}2 /vA u^9,u/gj public void setSFileName(String value) 81g0oVv { vsR&1hs sFileName = value; CjCnh7tm } W5 }zJ)x }]) f^ OMNdvrE*=O public int getNSplitter() o!&*4>tF { )A"7l7?.n) return nSplitter; :W55JD' } BJTljg({o N9Vcp~; ABf#!G public void setNSplitter(int nCount) KcE=m\ h { z""(M4 nSplitter = nCount; !b_IH0]U } _l<"Qqt } =cY]cPO `WL*Jb a WC
sLH /* F!'"mU<f **Utility.java mZ%\`H+ */ l0V@19Ec package NetFox; N*;/~bt7P H(| v \zU R9h public class Utility { Nq8A vBwo4 z'*>Tk8h sa])^mkq( public Utility() ([A;~ p;n { _9dV
3I p-_j0zv u^$ CR } G})mw *{bqHMd4L //线程睡眠 $6[]c)( public static void sleep(int nSecond) 'AU!xG6OQ { `Hqu2
'` try{ %|~UNP$ Thread.sleep(nSecond); Y,r2m nq } A_+WY|#M catch(Exception e) X5=7DE] { O)?0G$0 e.printStackTrace (); >'eqOZM } 78"W ~`8 } VrG |/2 !.A>)+AK //日志 g$qh(Z_s public static void log(String sMsg) nK[$ID { - =Hr|AhE System.err.println(sMsg); +(
d2hSIF } Phczf f.{0P-Np >=(e}~5y public static void log(int sMsg) +oa]v1/W { &DV'%h>i= System.err.println(sMsg); 9cQSS'`F } {rDZKy^f } uo^>95lkv )_ y{^kn3^ V l%k: /* aap:~F{]X **TestMethod.java i8]r}a */ !WmpnPr1 package NetFox; -MZ Eli g pJIH_H "#()4.9 public class TestMethod { ^/,s$dj Us<lWEX;k XN Y(@ public TestMethod() *HVO { ///xx/weblogic60b2_win.exe {+ m)*3~w try{ K:0RP?L SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); UkC\[$-"\ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); cjL!$OE6 SiteFileFetch fileFetch = new SiteFileFetch(bean); j8b:+io fileFetch.start(); Cn,dr4J[ } t
t=$:}A catch(Exception e){e.printStackTrace ();} t%%I.zIV7 `u-}E9{ n\ZFPXP } 5"sF#Y& ifkA3] ` mi!"pm w public static void main(String[] args) m-:k]9I { Oj2[(7mO/ new TestMethod(); TCYnErqk } +1Uw <~ } !(]|!F[m 点击下载更多相关资料
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