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public String sendHttpGet( String url ) throws IOException { pSLo'%XQ
HttpConnection hcon = null; :D!RmVs&lv
DataInputStream dis = null; Z"=u`pR5.
StringBuffer message = ""; t>-4J(d
try { 8Q[kR{sc
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int ch; M!bzm6tz0
while ( ( ch = dis.read() ) != -1 ) { 8l3X5w)
message = message.append( ( char ) ch ); xCl9d<S(M
} ~%Ba^ >
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} finally { l<1Qym3 F
if ( hcon != null ) hcon.close(); s:n D}+1
if ( dis != null ) dis.close(); oJhB11\
}//结束try/finally代码段 *6.#E`.w
return message.toString(); ~a2z-xq*E
}//结束 sendGetRequest( String ) [>O^K|
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byte[] byteRequest = requestBody.getBytes(); [.O8.yWh
for( int i = 0; i < byteRequest.length; i++ ) { -N.QJ?[,W{
dos.writeByte(byteRequest[i]); _SiVZwzP
} //结束for( int i = 0; i < byteRequest.length; i++ ) 8 3x-L
dos.flush(); //包含本句,在某些设被上将可能会产生不可预期的结果 ijd1dj
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} finally { ^/)yj)@E
if ( hc != null ) hc.close(); ~ ]\ K
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if ( dis != null ) dis.close(); 3cQ%$x@
7,Y:HaqnO1
if ( dos != null ) dis.close(); `[yTA@'_)[
}//结束 try/finally "n} z
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/* Z:?$lbXvib
* HttpMidlet.java xnMF: N
*/ k!G(TT3t
import javax.microedition.midlet.*; Qa '~h(
import javax.microedition.lcdui.*; 8 T; ~bQ
import javax.microedition.io.*; j>Z@xx@
import java.io.*; Q/~= }PB
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public class HttpMidlet extends MIDlet implements CommandListener { ~ ~R{X{t
//使用默认的URL。用户可以从图形用户接口改变这个值 W#gZx%dWN
private static String defaultURL = "[url]http://localhost:8080/test/servlet/EchoServlet[/url]"; X,,I:n9
g|^v>eZU
// 主MIDP 显示 @-'GQ^#$
private Display myDisplay = null; RA@KD>a
k0p^O zTr}
// 输入URL的图形用户接口组件 nPxR(FiJ+
private Form requestScreen; % *?$
private TextField requestField; O 'ZDra
H 6 /{mH
// 用于提交请求的图形用户接口组件 G%kg'1 zE
private List list; *;sBjMsBh
private String[] menuItems; - H*A@#K9,
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// 用于显示服务器响应的图形用户接口组件 @*obb*j
private Form resultScreen; {0Zu
private StringItem resultField; uk "U
Aob!6
//用于requestScreen的"send"按钮 PwOU{RH A
Command sendCommand; sgXu+$:<:
// 用于requestScreen的"exit"按钮 _U.Oe*90oh
Command exitCommand; Mh~JWD|)
// 用于requestScreen的"back"按钮 wQ$5BV 6G
Command backCommand; 7n+(w
s]w/IYE(
public HttpMidlet(){ 1>E6qK&*
// 初始化图形用户接口组件 a&Ni
myDisplay = Display.getDisplay( this ); }u/B0s(
sendCommand = new Command( "SEND", Command.OK, 1 ); &8]!|Z
exitCommand = new Command( "EXIT", Command.OK, 1 ); Dm\-a)Tus
backCommand = new Command( "BACK", Command.OK, 1 ); 4EcD]A o.
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//显示请求的URL -B+k}aU$L
requestScreen = new Form( "Type in a URL:" ); Sg(V7
requestField = new TextField( null, defaultURL, 100, TextField.URL ); Gk)"w?5w
requestScreen.append( requestField ); }3?wg
requestScreen.addCommand( sendCommand ); 2vNv6_%
requestScreen.addCommand( exitCommand ); SJB0|z
requestScreen.setCommandListener( this ); e 0 0Mg
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// 选择想要的HTTP请求方法 h/ khw}~
menuItems = new String[] {"GET Request", "POST Request"}; 7=UnB[
list = new List( "Select an HTTP method:", List.IMPLICIT, menuItems, null ); qQ%0fcLxJ
list.setCommandListener( this ); ez=\2
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// 先是从服务器上收到的信息 .:'S%q }
resultScreen = new Form( "Server Response:" ); +*Zc4w
resultScreen.addCommand( backCommand ); )6DBiy
resultScreen.setCommandListener( this ); r_[- l5O
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}//结束HttpMidlet() *dt::'c
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public void startApp() { <fcw)5' V
myDisplay.setCurrent( requestScreen ); cJyPa/8sf
}//结束 startApp() v2`o-H
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public void commandAction( Command com, Displayable disp ) { 4*=9!YR
// 当用户点击"send"按钮 .X!_T%q
if ( com == sendCommand ) { yWOgrR>ju#
myDisplay.setCurrent( list ); \Z,lQ@q-
} else if ( com == backCommand ) { G8v`,JRbY
requestField.setString( defaultURL ); ;J1)6_c
myDisplay.setCurrent( requestScreen ); E ~"D {
} else if ( com == exitCommand ) { j3E`X4_@w:
destroyApp( true ); q|H[\$R
notifyDestroyed(); ^F,'q
}//结束 if ( com == sendCommand ) )Zcj)g]7
wjHo:)R>Mh
if ( disp == list && com == List.SELECT_COMMAND ) { Bk \Qe?
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String result; AZv*$CXI
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if ( list.getSelectedIndex() == 0 ) // 发送一个 GET 请求到服务器 nJne |'b
result = sendHttpGet( requestField.getString() ); /]su~s`
else // 发送一个 POST 请求到服务器 C$ )Ul-~V
result = sendHttpPost( requestField.getString() ); yS`4s(8SP
Is^ }:~{2
resultField = new StringItem( null, result ); e2\^ ?L&#q
resultScreen.append( resultField ); vlzSN( +
myDisplay.setCurrent( resultScreen ); Du>3SXFun
}//结束if ( dis == list && com == List.SELECT_COMMAND ) v)cJ `AzY
}//结束 commandAction( Command, Displayable ) )3%78E}1
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private String sendHttpGet( String url ) n*H5t/;
{ @#[a W
HttpConnection hcon = null; FUmi (2
DataInputStream dis = null; m"/n+S ,5
StringBuffer responseMessage = new StringBuffer(); CzSGCCoQ
gCzkCc~)}
try { (nee@oOg
//使用READ权限的标准的 HttpConnection /BgUS ]Y:
hcon = ( HttpConnection )Connector.open( url ); 2SZ'N7dV
Es;3avbAS
//从HttpConnection取得一个 DataInputStream Q!}RjZnd
dis = new DataInputStream( hcon.openInputStream() ); kXf Y
A/ W-ao
// 从服务器上取回响应 vn<RV
int ch; >7oyWBmP
while ( ( ch = dis.read() ) != -1 ) { ^0iVY[q>
responseMessage.append( (char) ch ); w /W+{<:
}//结束while ( ( ch = dis.read() ) != -1 ) Y:*i:83 r
} VJ *ktE
catch( Exception e ) vZo~g_ ]
{ E ZZy;
e.printStackTrace(); ?qK&.t
responseMessage.append( "ERROR" ); ]XDOu!|
} finally { KoL0?5Da5+
try { ]pw^nw e
if ( hcon != null ) hcon.close(); ; 5 t &
if ( dis != null ) dis.close(); ) ( #HU
} catch ( IOException ioe ) { !~~j2g_ O
ioe.printStackTrace(); %dVl;P.
}//结束try/catch K!U<>GtQ}
}//结束try/catch/finally aZYwvy^i
return responseMessage.toString(); H[9!8w@
}//结束sendHttpGet( String ) qmBJ&4:H3
MCmy0 BD
private String sendHttpPost( String url ) "s&o/UBD
{ vlR W
HttpConnection hcon = null; xp~>zh*X+#
DataInputStream dis = null; <zBt}P S
DataOutputStream dos = null; .j2"?,GC`
StringBuffer responseMessage = new StringBuffer(); ~$xgZ(z2
// 请求体 3V]Aq4j
String requeststring = "This is a POST."; !2"hY
~OZX)5+4A4
try { v<g Q{\r%
// 使用读写权限的 HttpConnection qOE1*LGw
hcon = ( HttpConnection )Connector.open( url, Connector.READ_WRITE ); {Qru9xL
[.1v VL2
//设置请求方法为POST =.=yx#;
hcon.setRequestMethod( HttpConnection.POST ); %bQ:M|^1
P= =5>S(
// 取得发送请求字符串的DataOutputStream ,ob-^Qz
dos = hcon.openDataOutputStream(); R en_
byte[] request_body = requeststring.getBytes(); 0qfV.
:b9K _Uc-
// 发送请求字符串到服务器 Yl4BL,$9>
for( int i = 0; i < request_body.length; i++ ) { ^ S =Y#
dos.writeByte( request_body[i] ); 9I St[N*
}//结束 for( int i = 0; i < request_body.length; i++ ) JM RYDVt
o.Mi0
// 取得做为接收服务器响应的DataInputStream 7PiCm(
dis = new DataInputStream( hcon.openInputStream() ); 3uoM5Hl0xX
<DM"Im+Vm8
// 从服务器上取回响应 <J,S |`
int ch; e,,)([
while( ( ch = dis.read() ) != -1 ) { Q5KcaL
responseMessage.append( (char)ch ); T1M4"XU
}//结束while( ( ch = dis.read() ) != -1 ) { r~$2/HkB
} !)UMwCqd
catch( Exception e ) &X!A@
{ iKT<H<H
e.printStackTrace(); ]r*Pc .$x
responseMessage.append( "ERROR" ); ;x
} lR"67R
finally { i$GBOrZ(
// 释放输入输出流和HTTP连接 "'OWCK e
try { Ycbs !K?
if( hcon != null ) hcon.close(); rmw*Bu|F
if( dis != null ) dis.close(); Hfz||[%UG
if( dos != null ) dos.close(); bs)A#EFI45
} catch ( IOException ioe ) { Oz;D`XW
ioe.printStackTrace(); ]xm3BXp
}//结束try/catch (<I.M>
}//结束try/catch/finally Y>--*1L1
return responseMessage.toString(); c ']+ JX{
}//结束sendHttpPost( String ) FrSsSkg
9Kj0azz8o
public void pauseApp() { n]Mf0em
}//结束pauseApp() ^bn?[TE6
4*.Nb0^
public void destroyApp( boolean unconditional ) { reL{28F
myDisplay = null; yTdBlZ
requestScreen = null; ])EOeOPE
requestField = null; OUx=`Yh05
resultScreen = null; AJ9-er
resultField = null; CK0v.3G
}//结束 destroyApp( boolean ) Lr>d3W 9
}//结束HttpMidlet ktq?EwtS!
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