jsp.htm

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&quot;Times New Roman&quot;;color:#9900FF">加入</span><span lang="EN-US" style="color:#9900FF">CLASSPATH</span><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;;color:#9900FF">。建立自己的</span><span lang="EN-US" style="color:#9900FF">JavaBean</span><span style="font-family:宋体;mso-ascii-font-family:
&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;color:#9900FF">和</span><span lang="EN-US" style="color:#9900FF">package</span><span style="font-family:宋体;
mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;
color:#9900FF">时，就放在这个目录中也不失为一种简易的方法。</span><span lang="EN-US" style="color:#9900FF"><br>
</span><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;;color:#9900FF">下面介绍一个简单的</span><span lang="EN-US" style="color:#9900FF">JavaBean</span><span style="font-family:宋体;
mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;
color:#9900FF">框架。用文本编辑器创建一个文本文件</span><span lang="EN-US" style="color:#9900FF">helloWorld.java</span><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;;color:#9900FF">，并保存在</span><span lang="EN-US" style="color:
#9900FF">\jswdk-1.0.1\webpages\WEB-INF\jsp\beans\test</span><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;;color:#9900FF">目录下，其内容如下：</span><span lang="EN-US" style="color:#9900FF"> 
<o:p>
</o:p>
</span></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF">&nbsp;<o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF">package test;<o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF">public class helloWorld {<o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span>public 
String name = &quot;My first bean&quot;;<span style="mso-tab-count:1">&nbsp;&nbsp;&nbsp; 
</span><o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span>public 
String getHi()<o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span>{<o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF"><span style="mso-tab-count:3">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
</span>return &quot;Hello from &quot; + name;<o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span>}<span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; 
</span><o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF">}<o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF">&nbsp;<o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#9900FF"><span style="mso-tab-count:1">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
</span><o:p>
</o:p>
</span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#9900FF"><br>
helloWorld.java</span><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;;color:#9900FF">编辑好后，在</span><span lang="EN-US" style="color:#9900FF">DOS</span><span style="font-family:宋体;
mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;
color:#9900FF">状态下，进入目录</span><span lang="EN-US" style="color:#9900FF">\jswdk-1.0.1\webpages\WEB-INF\jsp\beans\</span><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;;color:#9900FF">，用</span><span lang="EN-US" style="color:#9900FF">JDK</span><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;;color:#9900FF">的</span><span lang="EN-US" style="color:#9900FF">javac</span><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;;color:#9900FF">命令编译</span><span lang="EN-US" style="color:#9900FF">helloWorld.java</span><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;;color:#9900FF">如下：</span><span lang="EN-US" style="color:#9900FF"><br>
javac helloWorld.java<br>
</span><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;;color:#9900FF">注意，</span><span lang="EN-US" style="color:#9900FF">Java</span><span style="font-family:宋体;
mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;
color:#9900FF">是区分大小写的，在程序中，编译命令行中字母的大小写都不能写错。编译成功就表示建立了一个</span><span lang="EN-US" style="color:#9900FF">JavaBean</span><span style="font-family:宋体;
mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;
color:#9900FF">。下面看如何在</span><span lang="EN-US" style="color:#9900FF">JSP</span><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;;color:#9900FF">中使用这个</span><span lang="EN-US" style="color:
#9900FF">JavaBean</span><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;
mso-hansi-font-family:&quot;Times New Roman&quot;;color:#9900FF">。用文本编辑器创建一个文本文件</span><span lang="EN-US" style="color:#9900FF">hi-bean.jsp</span><span style="font-family:
宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:&quot;Times New Roman&quot;;
color:#9900FF">，并保存在</span><span lang="EN-US" style="color:#9900FF">\jswdk-1.0.1\webpages\test</span><span style="font-family:宋体;mso-ascii-font-family:&quot;Times New Roman&quot;;mso-hansi-font-family:
&quot;Times New Roman&quot;;color:#9900FF">目录下，其内容如下：</span><span lang="EN-US" style="color:#9900FF"> 
<o:p>
</o:p>
</span></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF">&nbsp;<o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><code><span style="font-size:10.0pt;font-family:黑体;
color:#9900FF">〈<span lang="EN-US">html&gt;<o:p>
</o:p>
</span></span></code></p>
<p class="MsoNormal"><code><span style="font-size:10.0pt;font-family:黑体;
color:#9900FF">〈<span lang="EN-US">head&gt;<o:p>
</o:p>
</span></span></code></p>
<p class="MsoNormal"><code><span style="font-size:10.0pt;font-family:黑体;
color:#9900FF">〈<span lang="EN-US">title&gt;JavaBean 试验〈/title&gt;<o:p>
</o:p>
</span></span></code></p>
<p class="MsoNormal"><code><span style="font-size:10.0pt;font-family:黑体;
color:#9900FF">〈<span lang="EN-US">/head&gt;<o:p>
</o:p>
</span></span></code></p>
<p class="MsoNormal"><code><span style="font-size:10.0pt;font-family:黑体;
color:#9900FF">〈<span lang="EN-US">body&gt; <o:p>
</o:p>
</span></span></code></p>
<p class="MsoNormal"><code><span style="font-size:10.0pt;font-family:黑体;
color:#9900FF">〈<span lang="EN-US">jsp:useBean id=&quot;helloBean&quot; 
scope=&quot;session&quot; class=&quot;test.helloWorld&quot; /&gt;<o:p>
</o:p>
</span></span></code></p>
<p class="MsoNormal"><code><span style="font-size:10.0pt;font-family:黑体;
color:#9900FF">〈<span lang="EN-US">%= helloBean.getHi() %&gt;<o:p>
</o:p>
</span></span></code></p>
<p class="MsoNormal"><code><span style="font-size:10.0pt;font-family:黑体;
color:#9900FF">〈<span lang="EN-US">hr&gt;<o:p>
</o:p>
</span></span></code></p>
<p class="MsoNormal"><code><span style="font-size:10.0pt;font-family:黑体;
color:#9900FF">〈<span lang="EN-US">%<o:p>
</o:p>
</span></span></code></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF"><span style="mso-tab-count:2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
</span>helloBean.name = &quot;JSP&quot;;<o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF"><span style="mso-tab-count:2">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 
</span>out.print(helloBean.getHi());<o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><code><span lang="EN-US" style="font-size:10.0pt;font-family:
黑体;color:#9900FF">%&gt;<o:p>
</o:p>
</span></code></p>
<p class="MsoNormal"><code><span style="font-size:10.0pt;font-family:黑体;
color:#9900FF">〈<span lang="EN-US">/body&gt;<o:p>
</o:p>
</span></span></code></p>
<p c