📄 手机与servlet的网络通信技巧.htm
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</SPAN>try{<O:P> </O:P></SPAN></P>
<P align=left class=MsoNormal
style="TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'"><SPAN
style="mso-tab-count: 3">
</SPAN>hc =
(HttpConnection)Connector.open(url,Connector.READ_WRITE);<O:P>
</O:P></SPAN></P>
<P align=left class=MsoNormal
style="TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'"><SPAN
style="mso-tab-count: 3">
</SPAN>//</SPAN><SPAN
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN; mso-fareast-font-family: 'MS Sans Serif'">设置请求属性</SPAN><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'"><O:P>
</O:P></SPAN></P>
<P align=left class=MsoNormal
style="TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'"><SPAN
style="mso-spacerun: yes">
</SPAN><SPAN
style="mso-spacerun: yes"> </SPAN>hc.setRequestMethod(HttpConnection.POST);<SPAN
style="mso-spacerun: yes"> </SPAN>//</SPAN><SPAN
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN; mso-fareast-font-family: 'MS Sans Serif'">设置为</SPAN><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'">POST</SPAN><SPAN
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN; mso-fareast-font-family: 'MS Sans Serif'">请求方式</SPAN><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'">,默认的请求方式是GET<O:P>
</O:P></SPAN></P>
<P align=left class=MsoNormal
style="TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'"><SPAN
style="mso-spacerun: yes"> </SPAN><SPAN
style="mso-tab-count: 1">
</SPAN>hc.setRequestProperty("IF-Modified-Since","15 Oct 2003
08:47:14 GMT");<O:P> </O:P></SPAN></P>
<P align=left class=MsoNormal
style="TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'"><SPAN
style="mso-spacerun: yes"> </SPAN><SPAN
style="mso-tab-count: 1">
</SPAN>hc.setRequestProperty("User-Agent","Profile/MIDP-1.0
Configuration/CLDC-1.0");<O:P> </O:P></SPAN></P>
<P align=left class=MsoNormal
style="TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'"><SPAN
style="mso-spacerun: yes"> </SPAN><SPAN
style="mso-tab-count: 1">
</SPAN>hc.setRequestProperty("Content-Language","en-CA");<O:P>
</O:P></SPAN></P>
<P align=left class=MsoNormal
style="TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'"><SPAN
style="mso-spacerun: yes">
</SPAN><SPAN
style="mso-spacerun: yes"> </SPAN>hc.setRequestProperty("Content-Type","application/x-www-form-urlencoded");<O:P>
</O:P></SPAN></P>
<P align=left class=MsoNormal
style="TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'"><SPAN
style="mso-spacerun: yes">
</SPAN><SPAN
style="mso-spacerun: yes"> </SPAN>hc.setRequestProperty("Connection","Keep-Alive");//</SPAN><SPAN
lang=EN-US
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Connection</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">头可以控制</SPAN><SPAN
lang=EN-US
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">MIDlet</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">和</SPAN><SPAN
lang=EN-US
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Web</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">服务器之间保持</SPAN><SPAN
lang=EN-US
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">"keep
alive"特色。"keep alive"</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">特色是指在</SPAN><SPAN
lang=EN-US
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">MIDlet</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">和</SPAN><SPAN
lang=EN-US
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">Web</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">服务器间始终使用同一个</SPAN><SPAN
lang=EN-US
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">HTTP</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">连接来多次传递数据</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">（</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">在通常情况下</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">，<SPAN
lang=EN-US>HTTP</SPAN></SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">是无连接的协议</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">，</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">每次数据传输完毕后都将断开连接</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">，</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN">而下次传递数据之前将重新建立连接</SPAN><SPAN
style="COLOR: black; FONT-FAMILY: 宋体; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-font-kerning: 0pt">）</SPAN><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'">
<O:P></O:P></SPAN></P>
<P align=left class=MsoNormal
style="TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'"><SPAN
style="mso-tab-count: 3">
</SPAN>//</SPAN><SPAN
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-ansi-language: ZH-CN; mso-fareast-font-family: 'MS Sans Serif'">发送请求参数到servlet</SPAN><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'"><O:P>
</O:P></SPAN></P>
<P align=left class=MsoNormal
style="TEXT-ALIGN: left; mso-layout-grid-align: none"><SPAN
lang=EN-US
style="FONT-FAMILY: 'MS Sans Serif'; FONT-SIZE: 9pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'MS Sans Serif'; mso-font-kerning: 0pt; mso-fareast-font-family: 'MS Sans Serif'"><SPAN
style="mso-tab-count: 3">
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