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/* p,$1%/m **SiteFileFetch.java .nKyB'uV */ [[oX$0Fp\! package NetFox; =>4>Z_q import java.io.*; G@
BrU q import java.net.*; l3b$b%0' z#8GF^U:T tJ bOn$]2" public class SiteFileFetch extends Thread { .kBi" p& hTf]t @,pO%,E6 SiteInfoBean siteInfoBean = null; //文件信息Bean l4|bpR Cp long[] nStartPos; //开始位置 Uj1^?d+b long[] nEndPos; //结束位置 _I3j7f,V FileSplitterFetch[] fileSplitterFetch; //子线程对象 9)e`mO*n long nFileLength; //文件长度 \,ir]e,1 boolean bFirst = true; //是否第一次取文件 Y>wpla[kUq boolean bStop = false; //停止标志 o5i?|HJ File tmpFile; //文件下载的临时信息 r-H~MisL DataOutputStream output; //输出到文件的输出流 E6y/,s^~S_ gB71~A{J //负责整个文件的抓取,控制内部线程(FileSplitterFetch类) Y}(v[QGV public SiteFileFetch(SiteInfoBean bean) throws IOException 6V*@
{ { ?dC[VYC\^ siteInfoBean = bean; 573wK~9oMh //tmpFile = File.createTempFile ("zhong","1111",new File(bean.getSFilePath())); Q?I)1][ !" tmpFile = new File(bean.getSFilePath()+File.separator + bean.getSFileName()+".info"); B`iQN7fd if(tmpFile.exists ()) AL&}WbUC { r/Qq-1E bFirst = false; \02j~r`o read_nPos(); s|"V$/X(W } "|.>pD#0& else -r/# 20Y { Ajs<a(,6 nStartPos = new long[bean.getNSplitter()]; -TjYQ nEndPos = new long[bean.getNSplitter()]; yQM7QLbTk } 8 y/YX toX4kmC 4/~8zvz&3 LV4x9?& } rm1R^n B`T|M$Ug t A\N$ public void run() f/eT4y { 0{gvd"q //获得文件长度 v>~ottQ| //分割文件 lk2F]@_kJH //实例FileSplitterFetch 05=O5<l
//启动FileSplitterFetch线程 ~pX&>v\T //等待子线程返回 0$":W try{ ](x4q if(bFirst) ;7K5Bo { QKE$>G
nFileLength = getFileSize(); ~AS2$ if(nFileLength == -1) n<"?+bz"< { J=Ak+J System.err.println("File Length is not known!"); Qh? E*9 } p%]*I? else if(nFileLength == -2) |\XjA4j { /-8v]nRB System.err.println("File is not access!"); DN&ZRA } A\i/@x5# else E`=y9r*Z { o-lb/=K+ for(int i=0;i<nStartPos.length;i++) }Xrs"u, { \#m;L/D nStartPos = (long)(i*(nFileLength/nStartPos.length)); g4oFUyk{ } &:S_ewJK7 for(int i=0;i<nEndPos.length-1;i++) N+"Y@X yg { y@nWa\iG nEndPos = nStartPos[i+1]; |pqLwnOu } [I4K`>|Z nEndPos[nEndPos.length-1] = nFileLength; o!aKeM~|Es } Olj]A]v} } n&r- N#bWMZ" /h0-qW //启动子线程 ie
2X.# fileSplitterFetch = new FileSplitterFetch[nStartPos.length]; 5w@ ;B for(int i=0;i<nStartPos.length;i++) v"F.<Q { dt',)i8D fileSplitterFetch = new FileSplitterFetch(siteInfoBean.getSSiteURL(), &oWWc$ siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(), Hm-+1Wx nStartPos,nEndPos,i); })M$#%( Utility.log("Thread " + i + " , nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); |n}W^}S5 fileSplitterFetch.start(); --Dw } c1jHg2xim // fileSplitterFetch[nPos.length-1] = new FileSplitterFetch(siteInfoBean.getSSiteURL(), {,]BqFXv siteInfoBean.getSFilePath() + File.separator + siteInfoBean.getSFileName(),nPos[nPos.length-1],nFileLength,nPos.length-1); MN$j{+ !Q // Utility.log("Thread " + (nPos.length-1) + " , nStartPos = " + nPos[nPos.length-1] + ", ^;6~=@#*C nEndPos = " + nFileLength); P9B@2# // fileSplitterFetch[nPos.length-1].start(); 0u,=OvU PJAE~|a f`:e#x //等待子线程结束 hIXGfvUy //int count = 0; QTz{ZNi! //是否结束while循环 #h6(DuViKw boolean breakWhile = false; ;}A#ws_CD_ .sbU-_ij@U 9(|[okB while(!bStop) +y6|Nq { tmRD$O%: write_nPos(); ojs&W]r0Z Utility.sleep(500); q&<#)#+ breakWhile = true; /quf'CV} :0CR=]WM R`76Ae`R8 for(int i=0;i<nStartPos.length;i++) d;mQ=k
1 { Dr6Br<yi if(!fileSplitterFetch.bDownOver) c~5#)AXMT { ?uU0NKZA breakWhile = false; \S=!la_T@m break; Pl}}!<!<z } mIFS/C } ,^26.p$ if(breakWhile) ,H1J$=X' break; O .TFV. ]N!SG@X+ 7Kk rfJqN //count++; Kp~k!6x //if(count>4) D4
{gt\V // siteStop(); (PsA[>F } ?9H7Twi+T **_VNDK+ L]K*Do System.err.println("文件下载结束!"); iJ?8)} } yZ0; \Tr*J catch(Exception e){e.printStackTrace ();} @
RTQJ+ms } ~1|sf8 C;dA?Es>R [cXu<vjFM //获得文件长度 g_0"T}09( public long getFileSize() l>~:lBO { X2M<DeF: int nFileLength = -1; puZ<cV
e/ try{ zesEbR)j URL url = new URL(siteInfoBean.getSSiteURL()); uqTOEHH7 HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); F|xXMpC.f
httpConnection.setRequestProperty("User-Agent","NetFox"); @h>#cwhU )6bxP&k sn5N9=\+T int responseCode=httpConnection.getResponseCode(); _N/]&|.. ! if(responseCode>=400) Xuh_bW&zF { :Jhx4/10 processErrorCode(responseCode); `3pe\s return -2; //-2 represent access is error j@GMZz< } W.MJyem g+ 2SB5 2D R3?~+y& String sHeader; Vq9hAD|k %(6f oYJ&BPuA' for(int i=1;;i++) \lKQDct. - { ?#04x70 //DataInputStream in = new DataInputStream(httpConnection.getInputStream ()); Rn(| //Utility.log(in.readLine()); Y1`. sHeader=httpConnection.getHeaderFieldKey(i); s$H5W`3 if(sHeader!=null)
%ef+Z { Mh~T.;f.qq if(sHeader.equals("Content-Length")) }[LK/@h { KO)<Zh nFileLength = Integer.parseInt(httpConnection.getHeaderField(sHeader)); `(Q58wR} break; hZ2PP ^ } 2i,Jnv=sR } 'kH#QO\(e" else ik8e break;
`d
OjCA_& } hp,T(D| } HoRLy*nU catch(IOException e){e.printStackTrace ();} 2mU}"gf[ catch(Exception e){e.printStackTrace ();} _xUhDu% ]"/ *7NM (/ k, q Utility.log(nFileLength); (]7@0d88 X\1D[n: ngm7Vs return nFileLength; #:s'&.6 } Bj@&c> tCc}}2bC& h$ZF[Xbfe
//保存下载信息(文件指针位置) _^P>@
^ private void write_nPos() 1d\K{ 7i# { }}_WZ},h try{ t8?+yG; output = new DataOutputStream(new FileOutputStream(tmpFile)); []dRDe;# output.writeInt(nStartPos.length); ioa 1n=j for(int i=0;i<nStartPos.length;i++) i
w m7M { P]6pPS // output.writeLong(nPos); c$e~O-OVD? output.writeLong(fileSplitterFetch.nStartPos); f^$\+H"W output.writeLong(fileSplitterFetch.nEndPos); \s~W;m } 3J(STIxg output.close(); zcxG%? Q } OVj,qL) catch(IOException e){e.printStackTrace ();} 8De
`.!Gg catch(Exception e){e.printStackTrace ();} o,aI<5" } F&cA!~ :"QRB#EC% $mlsFBd //读取保存的下载信息(文件指针位置) X='4N< private void read_nPos() 2ZE4^j| { DcOu=Y> 1 try{ OcSLRN?t DataInputStream input = new DataInputStream(new FileInputStream(tmpFile)); IloHU6h' int nCount = input.readInt(); ;nh7Elk nStartPos = new long[nCount]; !0fK*qIL nEndPos = new long[nCount]; \[D"W{9l for(int i=0;i<nStartPos.length;i++) rtzxMCSEU { -C8awtbC nStartPos = input.readLong(); G 8NSBaZe nEndPos = input.readLong(); l;|1C[V } 0j_!)B input.close(); JT_#>', } P AKh v.7 catch(IOException e){e.printStackTrace ();} O]~p)E catch(Exception e){e.printStackTrace ();} x`o_&09;CG } ~z< ? Wh SnXYq7`t .0a$E`V=D private void processErrorCode(int nErrorCode) DH9?~| { #vDe/o+= System.err.println("Error Code : " + nErrorCode); Q7DkhKT } CX1'B0=\r 'E7|L@X"r \7/xb{z| //停止文件下载 DAvAozM public void siteStop() .d8~]@U!< { }RyYzm2 bStop = true; 5,mb]v0k for(int i=0;i<nStartPos.length;i++) (TY^
ky Sr fileSplitterFetch.splitterStop(); zF{z_c#3@ yXEC@#?| Z>X-u eV } ?VzST } } L~0B //负责部分文件的抓取 t;4{l`dk **FileSplitterFetch.java `[:f;2(@ */ leyX:
+ package NetFox; $Z;0/\r% EL+}ab2S ;ga~ae=Fg import java.io.*; Z+vLEEX*uQ import java.net.*; C"F(kgL 8<g5.$xyz #cmj?y() public class FileSplitterFetch extends Thread { : 0%V:B ( E0be. CF$^we String sURL; //File URL y\@XW*_? long nStartPos; //File Snippet Start Position 0<P
-` |X long nEndPos; //File Snippet End Position N:d" {k int nThreadID; //Thread's ID Q}m)Q('Rk boolean bDownOver = false; //Downing is over 4~Z\tP|Q. boolean bStop = false; //Stop identical qvab>U` FileAccessI fileAccessI = null; //File Access interface \
(X~Z Z-/ E$j 43(+3$V M7 public FileSplitterFetch(String sURL,String sName,long nStart,long nEnd,int id) throws IOException 7d9%L}+q { Put+<o
< this.sURL = sURL; :Tjo+vw7$H this.nStartPos = nStart; xl<Cstr this.nEndPos = nEnd; "4ovMan nThreadID = id; ^WVr@6 fileAccessI = new FileAccessI(sName,nStartPos);//定位 |#MA?oz3T } q'1rSK EmH2 Dbw un..UU4 public void run() W/&cnp\ { H(""So7L while(nStartPos < nEndPos && !bStop) .=K@M"5& { (A?e}M^} T$RZRZo u/``*=Y@ try{ hB|LW^@v URL url = new URL(sURL); m+V'*[O{ HttpURLConnection httpConnection = (HttpURLConnection)url.openConnection (); O@EpRg1 httpConnection.setRequestProperty("User-Agent","NetFox"); %*Y:Rm'> String sProperty = "bytes="+nStartPos+"-"; NB>fr#pb httpConnection.setRequestProperty("RANGE",sProperty); h"q`gj Utility.log(sProperty); ymzlRs1^Ct N.3M~0M*
}9@,EEhg InputStream input = httpConnection.getInputStream(); j4Lf6aUOX //logResponseHead(httpConnection); y=q\1~] Z )TV'eq QDyL0l{C byte[] b = new byte[1024]; <G#JPt6 int nRead; eyUo67'7 while((nRead=input.read(b,0,1024)) > 0 && nStartPos < nEndPos && !bStop) IF@)L>-% { Rb\\6BU0 nStartPos += fileAccessI.write(b,0,nRead); (u RAK //if(nThreadID == 1) {HQ? // Utility.log("nStartPos = " + nStartPos + ", nEndPos = " + nEndPos); 4GaF:/ } p+A#t~K $7lI Dt Nno*X9>~ Utility.log("Thread " + nThreadID + " is over!"); uZg Kex;c bDownOver = true; =cg0o_q8 //nPos = fileAccessI.write (b,0,nRead); *R8q)Q } qM]eK\q 1 catch(Exception e){e.printStackTrace ();} /Wk\6 } 5H>[@_u+: } l*/I ;a$ n Hy| {3!v<CY' //打印回应的头信息 `|Tr"xavf public void logResponseHead(HttpURLConnection con) k%JwS_F { q]<cn2 for(int i=1;;i++) 41,Mt { \u2p] K> String header=con.getHeaderFieldKey(i); aQw?r if(header!=null) <{7B ^' //responseHeaders.put(header,httpConnection.getHeaderField(header)); t&0pE(MO/ Utility.log(header+" : "+con.getHeaderField(header)); mmEr2\L else Qnph?t> break; vA:1z$m } X8p-VCkV } De\&r~bTW9 Ll%[}C?~]? $^}?98m public void splitterStop() !{"{(h)+@ { GuNzrKDr bStop = true; 8
<EE4y } ~[ isR|> kC0F@'D )"wWV{k } -+ -@Yq$ ^6oz3+ "{j4?3f) /* $#8dtF **FileAccess.java .[NB"\<q *//文件访问(定位,写) mKQ!@$* package NetFox; >
QDmSy*& import java.io.*; 6Jrh'6o@ V-Oy< Y6&w0~?! public class FileAccessI implements Serializable{ oaM $< -6(C^X% //RandomAccessFile类用于在任意一个文件的特定位置上读/写字节 W{Ine>
a' RandomAccessFile oSavedFile; DHd9yP9- long nPos; C/\)-^ O2-9Oo@#, G!uoKiL public FileAccessI() throws IOException g,r'].Jg { #jv~FR`4v^ this("",0); 8:|F'{<<b } AK} wSXF I!|_C~I` 2 ?ep93:j public FileAccessI(String sName,long nPos) throws IOException >PGW>W$ { 5O%Q*\( oSavedFile = new RandomAccessFile(sName,"rw"); NDWpV this.nPos = nPos; v&;q4b4 oSavedFile.seek(nPos); ,dLh`t<\ } %!mJnc% ]EC zb/ @~qlSU& public synchronized int write(byte[] b,int nStart,int nLen) u`O
xY { P=OHiG\z int n = -1; DKx8<yEky try{ py6|uGN oSavedFile.write(b,nStart,nLen); =rMT1 n = nLen; T6*naH } (i^{\zv catch(IOException e) xlZ"F { gu7mGHn- e.printStackTrace ();
pQKR } #H fvY}[o @7e h/|Y, ?suNA return n; g[!t@K } w$MFCJ:p& %O#) =M~ YIvJN } oJA%t-&%R $e)d!m. J=JYf_=4bc /* ~Pq1@N>n **SiteInfoBean.java FctqE/>}I */ oi^2Pvauh package NetFox; 33z)F ^1sX22k $6kVhE!; public class SiteInfoBean { $vlq]6V8 PGF=q|j9K *7u~` private String sSiteURL; //Site's URL rXPq'k'h#- private String sFilePath; //Saved File's Path ,u8)g;8s private String sFileName; //Saved File's Name G1=GzAd$5 private int nSplitter; //Count of Splited Downloading File $T.we+u "7mYs)= RB`Emp&T public SiteInfoBean() GVP"~I~/: {//nSplitter的缺省值为5 ]r8t^bqe //default value of nSplitter is 5 pC2ZN this("","","",5); N}HQvlLkF9 } $w4%JBZr Cp` [0v~0 Vf9PHHH| public SiteInfoBean(String sURL,String sPath,String sName,int nSpiltter) %5Hsd { \
'G%%%;4 sSiteURL= sURL; N3nFE:`u] sFilePath = sPath; mrX 2w sFileName = sName; uu@Y]0- this.nSplitter = nSpiltter; B8;jRY nk|j(D /n;Ll](ri } (L} rH
Et]Xa FKRO0%M4}Z public String getSSiteURL() _:DnF { ,#:* dl return sSiteURL; 78zjC6}` } (hWr!(>C4] \n$s5i- 5G"LuA public void setSSiteURL(String value) +RWP;rk { HI)MBrj;r sSiteURL = value; qDHiyg^u } 03$-U0.;- (7/fsfsF 3NAU|//J public String getSFilePath() _ZX"gHx { G|MjKe4} return sFilePath; ]wFKXZeK } ?@8[1$1a |W4
\ hqrI%% public void setSFilePath(String value) C%_^0#8-0 { +EK(r@eV sFilePath = value; 5{/CqUIl } XHU&ix{Od uTgBnv(Y* _yk}
[x0> public String getSFileName() M0VC-\W7f { HEdOo~/~ return sFileName; hp=TWt~ } =.NZ{G Au3>=x` x}o]R public void setSFileName(String value) l}odW { t9T3e sFileName = value; k.=67L } a Mp*Ap q ,6 y{RyS 5(e?,B } public int getNSplitter() G%0G$3W" { X{KWBk.1 return nSplitter; ?g9mDe;k } E)z[@Np %. ^8&4$+ =qPk'n9i8 public void setNSplitter(int nCount) Q -;ltJ { N5 ITb0Tv nSplitter = nCount; DwM4/m } (}E-+:vFU } uX_A4ht* vQf'lEFk FD>j\ /* s33< }O0 **Utility.java rK&ofc]f$ */ $jMU|{ package NetFox; eBiP\ EGMj5@> s!S,;H public class Utility { $T* ##kyE9 t95hI DtD clfi)-^{K public Utility() F jdh&9Zc { S~^0
_? &X0/7)*"v nsR^TD;
} V"":_`1VW V#
Mw //线程睡眠 [P#^nyOh( public static void sleep(int nSecond) yH_L<n { N!" ]e*q try{
/;LteBoY Thread.sleep(nSecond); _YF~DU } ,Nl]rmI catch(Exception e) Q]X0O10 { 48,Aq*JFw e.printStackTrace (); SPKen}g } -f?Rr:# } Y ON@G5^ mY"DYYR> //日志 lS P{9L6 public static void log(String sMsg) d5<@WI:wz { *UVjN_na5 System.err.println(sMsg); 7O5`&Z'- } $4.mRS97g 4eb<SNi JtYc'%OF public static void log(int sMsg) dIv/.x/V { 4f,D3e%T| System.err.println(sMsg); ]e+IaZ[Wo } v8g3]MVj3 } pJ7wd~wF* B.fLgQK0 L^PZ\OC /* q|m8G **TestMethod.java 9R.IYnq */ t!^FWr& package NetFox; [;B_ENV 9/C0DDb e
#l/jFJU public class TestMethod { rN?
L8 -F,o@5W>Y U,/NygB~ public TestMethod() Y+N^_2@+C { ///xx/weblogic60b2_win.exe ^5vFF@to try{ p-V#nPb SiteInfoBean bean = new SiteInfoBean("http://localhost/xx/weblogic60b2_win.exe","L:\\temp","weblogic60b2_win.exe",5); D[{p~x^ //SiteInfoBean bean = new SiteInfoBean("http://localhost:8080/down.zip","L:\\temp","weblogic60b2_win.exe",5); V M[9!:
SiteFileFetch fileFetch = new SiteFileFetch(bean); K8*QS_* fileFetch.start(); S8j;oJ2d } u&l2s&i catch(Exception e){e.printStackTrace ();} fX G+88:2 M%4o0k]E,s ><iE VrpN } #I9|>XE1 DoWY*2E bTC2Ya public static void main(String[] args) xD#PM |I { lD2>`s5 new TestMethod(); @Zd+XWFw } }4xxge?r } THQW8 V 点击下载更多相关资料
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