Samuel Learning

<action path="/prepareBean"

           type="examples.bean.PrepareBeanAction">

           <forward name="success" path="/jsp/bean/Bean.jsp" />

</action>

public ActionForward execute(

        ActionMapping mapping,

        ActionForm form,

        HttpServletRequest request,

        HttpServletResponse response)

        throws Exception {

        // Set-up an example bean

        ExampleBean example = new ExampleBean();

        example.getList().add("List entry #1");

        example.getList().add("List entry #2");

        example.getList().add("List entry #3");

        example.getList().add("List entry #4");

        // Add a nested bean

        example.setNested(new NestedBean());

        // Place the example bean in the request scope

        request.setAttribute("example", example);

        // Forward to the test page

        return mapping.findForward("success");

}

/**Abooleanvalue*/

    privatebooleanbooleanValue = false;

    /**Adoublevalue*/

    privatedoubledoubleValue = 45213.451;

    /**Afloatvalue*/

    privatefloatfloatValue = -123.582F;

    /**Anintegervalue*/

    privateintintValue = 256;

    /**Alongintegervalue*/

    privatelonglongValue = 1321546L;

    /**Ashortintegervalue*/

    privateshortshortValue = 257;

    /**Astringvalue*/

    private String stringValue = "Hello, world!";

    /**AdateValuevalue*/

    private java.util.Date dateValue = new java.util.Date();

    /**Alist*/

    private List list = new ArrayList();

    /**Anarray*/

    private String[] array = { "Red", "Green", "Blue", "Black", "Orange" };

    /**Anestedbean*/

    private NestedBean nested = null;

    /**HTMLformattedmarkup*/

    private String html =

          "<p>This is a <strong>simple</strong> example of "

        + "<em>HTML</em> formatted text.</p>";

/**Astringvalue*/

private String stringValue = "This is a string from NestedBean";

输出request范围内example这个bean的原始属性

<bean:write name="example" property="booleanValue" />

输出request范围内example这个bean的String属性

<bean:write name="example" property="stringValue" />

输出request范围内example这个bean的date属性

<bean:write name="example" property="dateValue" />

格式化数字

<bean:write name="example" property="doubleValue" format="$0,000.00"/>

格式化数字

<bean:write name="example" property="floatValue" formatKey="format.currency"/>

格式化日期

<bean:write name="example" property="dateValue" format="MMM d yyyy '@' HH:mm"/>

格式化日期

<bean:write name="example" property="dateValue" formatKey="format.date"/>

输出列表元素

<bean:write name="example" property="list[2]" />

输出数组元素

<bean:write name="example" property="array[3]" />

输出嵌套的string值

<bean:write name="example" property="nested.stringValue"/>

过滤html里的<&>等符号

<bean:write name="example" property="html"/>

不过滤html符号

<bean:write name="example" property="html" filter="false"/>

定义和显示bean值

<bean:define id="define1" value="This is a test string"/>

<bean:write name="define1" />

定义bean值，值取自request范围内的变量

<bean:define name="example" property="nested" id="define2" />

<bean:write name="define2" property="stringValue" />

取得并显示request header的值

<bean:header name="Accept-Encoding" id="encodings" />

<bean:write name="encodings" />

从资源文件获取值

<bean:message key="message.example.simple"/>

<bean:message key="message.example.replaceable" arg0="a slightly more complex" arg1="2 replaceable" />

从parameter里获取值，赋给变量，然后显示该变量

<bean:parameter name="param1" id="p1" value=""/>

<bean:write name="p1" />

<bean:parameter name="param3" id="p3" value="DEFAULT"/>

<bean:write name="p3" />

取得list的大小，并显示他

<bean:size name="example" property="list" id="listSize" />

<bean:write name="listSize" />

定义cookie值，并显示其属性

<bean:cookie id="sess" name="JSESSIONID" value="JSESSIONID-IS-UNDEFINED"/>

<bean:write name="sess" property="value"/>