Struts BaseTag Sample

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maxwell 平面变压器仿真（一）在学习开关电源设计的时候，我们难免要设计变压器，采用有限元仿真软件MAXWELL 可以帮助我们确定变压器的励磁电感，漏感等参数。对于我们的理论分析大有裨益。但是苦于这破软件的教程真的是相当的零散，我相信大家用起来也总是苦于没有系统的教程指导，撰写本文的目的有两个，一个是记录自己使用的一些问题，一个是给大家提供一个可以参考的文档。阅读详情

In this example you will learn how to use Struts HTML Tags. In order to use the Struts HTML Tags you need to include the following taglib directive in the jsp page.

1.<%@taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
All the Struts HTML tags should be nested within the body of the <html:form /> tag. We will create a simple feedback form to see how the different Struts HTML Tags can be used. The feedback.jsp contains the following code.

01.<%@taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
02.<html>
03.<head>
04.<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
05.<title>Feedback Form</title>
06.</head>
07.<body>
08.<b>Feedback Form</b>
09.<hr>
10.<html:form action="https://youtubeproxy.org/default.aspx">
11.<table>
12. <tr>
13. <td>
14. Name :
15. </td>
16. <td>
17. <html:text name="feedbackForm" property="name" />
18. </td>
19. </tr>
20. <tr>
21. <td>
22. Sex :
23. </td>
24. <td>
25. <html:radio name="feedbackForm" property="sex" value="M" >
26. M </html:radio>
27. <html:radio name="feedbackForm" property="sex" value="F" >
28. F </html:radio>
29. </td>
30. </tr>
31. <tr>
32. <td>
33. Comments :
34. </td>
35. <td>
36. <html:textarea cols="20" rows="5" name="feedbackForm"
37. property="comments" />
38. </td>
39. </tr>
40. <tr>
41. <td>
42. <html:submit />
43. </td>
44. <td>
45. <html:reset />
46. </td>
47. </tr>
48.</table>
49.</html:form>
50.</body>
51.</html>
The name attribute of the HTML tag contains the Form Bean name. The property attribute of the HTML Tag contains the corresponding Form property.

Once the feedback is submitted by the user, the user will be forwarded to the success page. Here the feedback submitted by the user will be displayed. We use Struts Bean Tag do to this. We use Struts Logic Equal Tag to display Male if the user has selected M for sex and Female if the user has selected F for sex. In order to use the Struts Bean and Logic Tag you need to include the following taglib directives in the jsp page.

1.<%@taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
2.<%@taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
The success.jsp page contains the following code.

01.<%@taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
02.<%@taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
03.<html>
04.<head>
05.<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
06.<title>Feedback Form</title>
07.</head>
08.<body>
09.<b>Feedback Successfully Submitted.</b><br>
10.You have submitted the following feedback.
11.<table>
12. <tr>
13. <td>
14. Name :
15. </td>
16. <td>
17. <bean:write name="feedbackForm" property="name" />
18. </td>
19. </tr>
20. <tr>
21. <td>
22. Sex :
23. </td>
24. <td>
25. <logic:equal name="feedbackForm" property="sex" value="M"> Male </logic:equal>
26. <logic:equal name="feedbackForm" property="sex" value="F"> Female </logic:equal>
27. </td>
28. </tr>
29. <tr>
30. <td>
31. Comments :
32. </td>
33. <td>
34. <bean:write name="feedbackForm" property="comments" />
35. </td>
36. </tr>
37.</table>
38.</body>
39.</html>
On executing the example the following page will be dispalyed to the user.

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