手机与servlet的网络通信技巧.htm
来自「随着越来越多手提电话和个人数字助理开始融入到信息高速公路之上」· HTM 代码 · 共 616 行 · 第 1/5 页
HTM
616 行
style="mso-tab-count: 2">
</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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