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/* |AS<I4+& **SiteFileFetch.java z8xBq%97us */ o1uM( package NetFox; 6.6?Rp". import java.io.*; eK}GBBdO import java.net.*; "w__AYHV K'f2S `Io#440; public class SiteFileFetch extends Thread { h,,B"vPS 4b6)+*[O eL{$=Um SiteInfoBean siteInfoBean = null; //文件信息Bean DD`DU^o< long[] nStartPos; //开始位置 Gz(l~!n~a long[] nEndPos; //结束位置 PM'2zP[*W FileSplitterFetch[] fileSplitterFetch; //子线程对象 #)O^aac29 long nFileLength; //文件长度 1pjx8*!B boolean bFirst = true; //是否第一次取文件 !t\sg boolean bStop = false; //停止标志 (/X]9 File tmpFile; //文件下载的临时信息 @3bVjQ`4f DataOutputStream output; //输出到文件的输出流 l\|sHn/ nwIj?(8x //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) {.J<^V public SiteFileFetch(SiteInfoBean bean) throws IOException j-ob7(v)*] { Qraa0]56 siteInfoBean = bean; #qeC)T //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); 6E.[F\u tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); s-~`Ao'
< if(tmpFile.exists ()) DgB;6Wl { _CBMU'V bFirst = false; "/ Gw`^t read_nPos(); DhD##5a } <5}j(jxz} else : t/0 { aX
Ie nStartPos = new long[bean.getNSplitter()]; xC}' "``s nEndPos = new long[bean.getNSplitter()]; @#;*e] 1a } \C4wWh-A <2~DI0pp( . i^@v<+ >7~,w1t } ngI+afo
"<^n@=g'q X-J85b_e public void run() *kcc]*6@s { 14*6+~38m& //获得文件长度 =&(e* u_ //分割文件 5".bM8o //实例FileSplitterFetch @.`k2lxGd~ //启动FileSplitterFetch线程
'(g;nU< //等待子线程返回 m_,Jbf try{ cvhwd\ if(bFirst) kp#XpcS { yB 'C9wEH nFileLength = getFileSize(); +wQ}ZP& if(nFileLength == -1) 2b-g`60< { u6| IKZ System.err.println("File Length is not known!"); 4;eD}g } JAT%s
%UC else if(nFileLength == -2) @AK&R~< { 7PBE(d%m System.err.println("File is not access!"); ~$hR:I1 } .?LRt else k!'+7K. { MU\Pggs for(int i=0;i<nStartPos.length;i++) #)]/wqPoW { mIqm/5 nStartPos = (long)(i*(nFileLength/nStartPos.length)); '?g&);4)k- } 0Ng?U+6 for(int i=0;i<nEndPos.length-1;i++) Wh~,?}laj { 5)5yH bS nEndPos = nStartPos[i+1]; 8si{|*;hL } VT=gb/W6)a nEndPos[nEndPos.length-1] = nFileLength; PsD)]V9%: } 0rm(i*Q } 0WYu5| '2|P-/jU Mc!LC
.8 //启动子线程 (U_HX2f fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; yK$aVK" for(int i=0;i<nStartPos.length;i++) radP%W-U { 62y:i fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), R0LWuE%eD siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), 1&<o3)L: nStartPos,nEndPos,i); axq~56"7E Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); MUGoW;}v) fileSplitterFetch.start(); RDjw|V } EuImj#Zl // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), He}?\C
Bo siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); [-\U)>MY(p // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", .D\oKhV( nEndPos = " + nFileLength); [IAk9B.\ // fileSplitterFetch[nPos.length-1].start(); b;#_?2c $)BPtGMGo rK`^A //等待子线程结束 *<6dB#'
J //int count = 0; 0CK //是否结束while循环 *c&OAL] boolean breakWhile = false; LZ.Xcy A1`6+8}o;b lNtxM"G& while(!bStop) 1i_%1Oip { \okv}x^L=Z write_nPos(); a|.IAxJ Utility.sleep(500); Q"GM3? breakWhile = true; F`2h,i-9 j+{cc: h"X 7YK6e for(int i=0;i<nStartPos.length;i++) >]C/ Q6 { m g@Ol"2 if(!fileSplitterFetch.bDownOver) (@qS { AE~@F4MK breakWhile = false; dqo-.,= break; 1~3dX[& } :Ea|FAeK8 } ;Bj&9DZd if(breakWhile) a1/+C$
oB break; k;2.g$)W[c \8s:I+[HH pV;0Hcy //count++; v ?}0h5 //if(count>4) $xq04ejJ // siteStop(); OLm@-I* } n;$u%2 t2 yWE\)]9 D
.LR-Z System.err.println("文件下载结束!"); /!A"[Tyt } kWy@wPqms catch(Exception e){e.printStackTrace ();} b-#lKWso } D6+3f#k6 "5O>egt CR%h$+dzy //获得文件长度 $Bl51VjN public long getFileSize() UnYb}rF#% { }4H}*P> + int nFileLength = -1; WBkx!{\z try{ r]DU URL url = new URL(siteInfoBean.getSSiteURL()); aR('u:@jHi HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); -)3+/4Q( httpConnection.setRequestProperty("User-Agent","NetFox");
bZ OCj1 -1d*zySL T!>h Pg int responseCode=httpConnection.getResponseCode(); )b>misb/ if(responseCode>=400) F4WX$;1 { V45adDiZ processErrorCode(responseCode); /x$JY\cq` return -2; //-2 represent access is error kR^h@@'F" } )T^wc: [rK`BnJX ^blw\;LB String sHeader; DI2e%`$ <eS/-W%n6 wVnmT94 for(int i=1;;i++) T]tu#h{
a { w?^[*_Y //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); VNIl%9:-l //Utility.log(in.readLine()); D15-pz|Q sHeader=httpConnection.getHeaderFieldKey(i); Zf<T`'_d if(sHeader!=null) = >tkc/aa { b7I0R;Zj if(sHeader.equals("Content-Length")) J5HK1 { ]?wz. nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); hfyU}`]
break; !K}W.yv, } `BG>%# } %O" Whe else ,+6u6 break; g52)/HM } JJSE@$",\ } C58o="L3S catch(IOException e){e.printStackTrace ();} 7Re\*[)T catch(Exception e){e.printStackTrace ();} nqUnDnP2c -.8K"j{N |pWu|M _' Utility.log(nFileLength); t&q~ya/C m*N8!1Ot ~n%Lo3RiP return nFileLength; ) 5$?e } ~+Pe=~a[ eL(<p] GN!
R<9 //保存下载信息(文件指针位置) ;DYS1vG o private void write_nPos() y_Urzgm( { F`x_W;\ try{ <f8j^ output = new DataOutputStream(new FileOutputStream(tmpFile)); =RRv&
"2r output.writeInt(nStartPos.length); ~M} K]Li for(int i=0;i<nStartPos.length;i++) LPu*Lkx { k_wcol,W // output.writeLong(nPos); 5 m-/N?c output.writeLong(fileSplitterFetch.nStartPos); $`/UG0rdC output.writeLong(fileSplitterFetch.nEndPos); w?|qKO } ;
YQB output.close(); g@4~, } [R%*C9Y d catch(IOException e){e.printStackTrace ();} 4W*o:Y! catch(Exception e){e.printStackTrace ();} K$/"I0YyI } 'b}RFzEn /NCN wAj7 GPhhg //读取保存的下载信息(文件指针位置) l7^^MnkC private void read_nPos() B;e<.M)e { Q8m%mJz~] try{ j8[U}~*^ DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); 2-8Dc4H]r int nCount = input.readInt(); 0NZ'(qf~9 nStartPos = new long[nCount]; >uq0}HB$a nEndPos = new long[nCount]; M57<e`m for(int i=0;i<nStartPos.length;i++) zm5PlG { Sqb>aj nStartPos = input.readLong(); #!UJY%c~ nEndPos = input.readLong(); q6C`hVMl } z7`|N`$Z#s input.close(); NFEr ,n } ~i?A! catch(IOException e){e.printStackTrace ();} !'F1Ht catch(Exception e){e.printStackTrace ();} ;)CN=J! } 1@t.J> ki@C}T5 H8? Y{H private void processErrorCode(int nErrorCode) ui#nN { .Hqq!& System.err.println("Error Code : " + nErrorCode); kG!hqj } klFS3G g*YA~J@ `Tyd1!~ //停止文件下载 1Xm>nF~ public void siteStop() 0'pB7^y { ]7W!f 2@ bStop = true; DAWF
=p] for(int i=0;i<nStartPos.length;i++) q 9xA.* fileSplitterFetch.splitterStop(); ^#Q-?O V^[&4 (W:@v&p } $RY GAh } }l$zZ>.\H //负责部分文件的抓取 L f"!:] **FileSplitterFetch.java [y'blCb */ N'EZJoH package NetFox; U- 1UWq !fn%Q'S H<i!C|AF import java.io.*; E:**gvfq import java.net.*; 8o%Vn'^t +)q ,4+K%} @#,/6s7? public class FileSplitterFetch extends Thread { FD
8Lk g&2g>] ?|W3RK; String sURL; //File URL Bt@?l]Y long nStartPos; //File Snippet Start Position zc)nDyn long nEndPos; //File Snippet End Position [=jZP,b&), int nThreadID; //Thread's ID Sj(>G; boolean bDownOver = false; //Downing is over L
QV@]z& boolean bStop = false; //Stop identical -%fj-Y7y FileAccessI fileAccessI = null; //File Access interface +CBN[/Z^i '{
=F/q CS~onf<xz public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException !vu-`u~86 { qfJ2iE|o2. this.sURL = sURL; g{}<ptx] this.nStartPos = nStart; 3R%JmLM+R9 this.nEndPos = nEnd; v%*don nThreadID = id; ' abEY fileAccessI = new FileAccessI(sName,nStartPos);//定位 k0V]<#h87 } o}KVT%} t.;._' SQK82/ public void run() :~8@fEKb{ {
+\_\53 while(nStartPos < nEndPos && !bStop) G^dp9A { r4iNX+h?V UwS7B~ Q<V1`e try{ AA,/AKikd URL url = new URL(sURL); =L#&`s@)_ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); tb~E.Lm\ httpConnection.setRequestProperty("User-Agent","NetFox"); OjlX<y. String sProperty = "bytes="+nStartPos+"-"; AH'c:w]~ httpConnection.setRequestProperty("RANGE",sProperty); sv%E5@ Utility.log(sProperty); 5<PNl~0 QjSWl,{
$D P<&bAsje InputStream input = httpConnection.getInputStream(); FNLS=4 //logResponseHead(httpConnection); `O2P&!9& yD& Y`f# zC)JOykI% byte[] b = new byte[1024]; oc,I,v int nRead; l([aKm# while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) D
)`(b { &\6},JN nStartPos += fileAccessI.write(b,0,nRead); aeN #<M&$< //if(nThreadID == 1) L)U*dY // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); ER9{D$ } BrSvkce Q+Q"J U $<)]~**K Utility.log("Thread " + nThreadID + " is over!");
hq{{XQ bDownOver = true; zL+t&P[\ //nPos = fileAccessI.write (b,0,nRead); Ip7#${f5M } "!vY{9, catch(Exception e){e.printStackTrace ();} n!Y_SPg
} v+{{j|x= } ELnUpmv\ $k&v
juB. VV1sadS:S` //打印回应的头信息 &D{!zF public void logResponseHead(HttpURLConnection con) ZlC+DXg#S { tc`3-goX for(int i=1;;i++) 4s:M}=]N { yN`hW&K String header=con.getHeaderFieldKey(i); qVfn(rZ if(header!=null) )N- '~<N //responseHeaders.put(header,httpConnection.getHeaderField(header)); (OE S~G Utility.log(header+" : "+con.getHeaderField(header)); BR@gJ(2 else l<=k#d break; tq}sedYhee } 6v:L8t$" } *wqR .n? `R
(N3 w_`;Mn%p public void splitterStop() R=Lkf { |QbCFihn bStop = true;
l8+1{6xP } pK{G2]OK{U Vo{
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zBTxM R3_;!/1 /* D?Ol)aj? **FileAccess.java %<Qv?`B *//文件访问(定位,写) U%1M?vT/ package NetFox; $ta"Ug.z import java.io.*; h-Ks:pcR \hlS?uD\ TGG=9a]m public class FileAccessI implements Serializable{ OBlQ $M-"az] //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 rFC9y o RandomAccessFile oSavedFile; 23=wz%tF long nPos; \[]BB5)8 jsV1~1:83 H
9/m6F public FileAccessI() throws IOException FR50y+h^$ { %y>*9$<pXe this("",0); mrsN@(X0 } 3\ )bg
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public FileAccessI(String sName,long nPos) throws IOException :&$v.# { I`@>v%0 oSavedFile = new RandomAccessFile(sName,"rw"); ;/23CFYM this.nPos = nPos; j}@LiH'Q oSavedFile.seek(nPos); qa:muW } tQxAZ0B^ FDBNKQV .gRb' public synchronized int write(byte[] b,int nStart,int nLen) 9XS>;<"2 { `tH F} int n = -1; I)%bOK] try{ [ot+EA oSavedFile.write(b,nStart,nLen); -ImO y| n = nLen; W>x.*K } Zn|lL0b{q catch(IOException e) Wa?\W& { ed/
"OgA e.printStackTrace (); =y?Aeqq\fl } N1:)Z`r :=quCzG
NQ '|M return n; }DvT6 } :W-xsw $RRh}w\0^ vl s+E o] } b\NY!)B bWCtRli} #'#@H /* 4
;6,h6a **SiteInfoBean.java &ML-\aSal */ s/;S2l$` package NetFox; #cJ1Jj $ ~-yq,x z^KBV^n public class SiteInfoBean { "[_gRe*2 !a%_A^t7 JsX}PVuL private String sSiteURL; //Site's URL (c3O> *M private String sFilePath; //Saved File's Path ,k:>Z&: private String sFileName; //Saved File's Name D#>d+X$ private int nSplitter; //Count of Splited Downloading File &xC5Mecb* HXB&
6 KpQ@cc public SiteInfoBean() T}'*Gry {//nSplitter的缺省值为5 d<cQYI4V //default value of nSplitter is 5 1NN#-U this("","","",5); &6\E'bBt } A(C0/|#V +I.{y JVx-4? public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) [;C*9Nl { 0)vX
sSiteURL= sURL; 6D4u?P, sFilePath = sPath; `Z@qWB< sFileName = sName; w/ID yQ this.nSplitter = nSpiltter; Jjx1`S*i >IS BK[=H )RT:u)N } -{*QjP;K UQT=URS Og2w]B[
public String getSSiteURL() B1U7z1< { .T~Oc'wGo return sSiteURL; $C{-gx+: } ]PH'G>x 9$R}GK vWYU'_= public void setSSiteURL(String value) ^{O1+7d[. { _6sSS\ sSiteURL = value; V$MMK } Ez^wK~ Q"GZh.m Lnltt86 public String getSFilePath() 9iK%@k { 5.U|CL return sFilePath; 0*/[z~Z-1 } H|d"45J_ )f`oCXh eyByAT~W, public void setSFilePath(String value) #ChF{mh { q+9c81b sFilePath = value; mw${3j~& } 7}fT7tsN K3J,f2Cn$ ? C6tYd public String getSFileName() *b(nX,e { HhqNpU return sFileName; c38ENf } }}d,xI WSx0o} { =IAS} public void setSFileName(String value) E*UE?4FSw| { ]6?6 k4@ sFileName = value; @t#Ju1Y } jH2_Ekgc;_ Cl!qdh6 oMb@)7 public int getNSplitter() kfs[*ku { Uj)`(}r return nSplitter; zhC5%R &n/ } SGLU7*sfd ,D{D
QJ(B -j}zr yG- public void setNSplitter(int nCount) f;a55%3c { Ob
h@d| nSplitter = nCount; /V E|F Ts } 89%#;C } p y%RR*4# &jE@i# y-a3 /* = _/XFN **Utility.java /G!M\teeF */ 39Tlt~Psz package NetFox; 9h0Y">}`b Au{J/G<W@ c[4I> "w public class Utility { E Ks4N4k M:.0]'[s5 t``q_!s}F public Utility() "VQ7Y`,+ { :Mnl 1;oh d`J~w/]
`\ 5P![fX|5 } v4X)R
"jJ yz^Rm2$f9 //线程睡眠 mW 'sdb public static void sleep(int nSecond) yo!Y%9 { kuo!}QFL try{ 7toDk$jJRg Thread.sleep(nSecond); eIt<da<G? } 7E\k97#G catch(Exception e) 2X@" #wIg { Hie e.printStackTrace (); ?!$:I8T } }9 I,p$ } o9c?)KQ G9r~O#=gy //日志 d&t,^Hj public static void log(String sMsg) Fz@9
@ { $3^Cp_p6 System.err.println(sMsg); ?4YLt|sn } \vqqs k[5:]5lp+ E8b:MY public static void log(int sMsg) aJ$({ZN\# { jF0>wm System.err.println(sMsg); c4(og|ifk } trMwFpfu } d2X?^ `]wk)50BVp b_a6| /* F%G} >xn **TestMethod.java v8
pOA<s */ I"2*}v| package NetFox; x5eSPF1 9}aEV 0 V| Q4F&#^02y public class TestMethod {
Jju^4 &/-}`hIAT Z90]I<a~ public TestMethod() Nd%j0lj { ///xx/weblogic60b2_win.exe j},3@TFh try{ 9
f=~E8P SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); U*7x81v?j //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); b
r\_ SiteFileFetch fileFetch = new SiteFileFetch(bean); IRT0
fileFetch.start(); n|eM}ymF+ } Nyl)B7/w catch(Exception e){e.printStackTrace ();} 0@kL<\u CX#d9
8\b 7(C:ty9 } 9i+`,r
q0VR&b`?>D QfRo`l/V9 public static void main(String[] args) 63Z^ k( { !AN; new TestMethod(); 3U%kf<m= } U}DLzn|w } J(w 3A)( 点击下载更多相关资料
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