From: http://blog.sina.com.cn/s/blog_4620826d0100cmvr.html
Common struts tag Library
The logic tag library mainly has the following labels.
• Empty: If the given variable is null or a null string, the content of the label body is calculated and output.
• Equal: if a given variable is equal to a specific value, the content of the label body is calculated and output.
• Forward: Specifies the actionforward item that controls a page.
• Greaterequal: if a given variable is greater than or equal to a specific value, the content of the label body is calculated and output.
• Greaterthan: if a given variable is greater than a specific value, the content of the label body output by the well is calculated.
• Iterate: traverses the elements of a given set and loops the content of the label body.
• Lessequal: If the given variable is smaller than or equal to a specific value, the content of the label body is calculated and output.
• Lessthan: if a given variable is smaller than a specific value, the content of the label body is calculated and output.
• Match: if a specific string is a suitable substring for a given message, the content of the TAG body is calculated and output.
• Messagesnotpresent: if a request does not contain specific message content, the content of the TAG body is calculated and output.
• Messagespresent: if a request contains specific message content, the content of the TAG body is calculated and output.
• Notempty: If the given variable is neither empty nor a null string, the content of the label body is calculated and output.
• Notequal: If the given variable is not equal to a specific value, the content of the label body is calculated and output.
• Notmatch: if the specified Yu string is not a suitable sub-string for the given message, the tag is calculated and output.
Body content.
• Notpresent: if the specified value does not appear in the request, the content of the TAG body is calculated and output.
• Present: if a specific value appears in the request, the content of the TAG body is calculated and output.
• Redirect: redirects the page.
Struts provides HTML tags for most HTML tags. html supports the following tags.
• Base: represents an HTML <base> tag.
• Button: a button, which has no action by default.
• Cancel: represents a Cancel button.
• Checkbox: represents a checkbox input box.
• Error: error message used for data verification.
• File: represents a file browsing input box.
• Form: represents a form field.
• Frame: represents an HTML <frame> tag.
• Hidde: represents a hidden domain.
• Htrnl: The <HTML> tag displayed as HTML.
• Image: represents the image field of the form field.
• IMG: an IMG tag in HTML.
• Validation crit: It is represented by JavaScript verification code generated according to validatorplugin.
• Link: represents an HTML hyperlink.
• Messages: it is used to output various struts prompts, including verification prompts.
• Multibox: represents a checkbox input box.
• Option: represents an option in the selection box.
• Password: represents a password input box.
• Radio: represents a single-choice input box.
• Reset: represents a reset button.
• Rewrite: represents a URL.
• Select: displays a list selection box.
• Submit: represents a submit button.
• Text: represents a single line text input box.
• Textarea: a multi-line text box.
The bean tag library is mainly used to output attribute values, prompt messages, and define request parameters. Below is the bean tag
Common Library labels.
• COOKIE: defines the requested cookie value as a JavaBean instance that can be accessed by a script.
• Define: defines the attribute value of a bean as a variable that can be accessed by the script.
• Header: defines the value of the Request Header as a variable that can be accessed by the script.
• Include: Define a jsp resource as a bean instance.
• Message: Used to output international information.
• Page: defines a specific item in page context as a bean.
• Parameter: Define request parameters as variables that can be accessed by scripts.
• Resource: loads Web application resources and converts them to JavaBean.
• Struts: used to configure a struts internally as a bean.
• Write: outputs the attribute value of a bean.
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