1. Create a new class Actionwildcard, and verify the wildcard method, such as:
2. Add student two methods that need to be practiced add,deete
Package Cn.cqvie.wildcard; Import Com.opensymphony.xwork2.ActionSupport; Public class extends actionsupport { public String Add () {return SUCCESS;} Public String Delete () {return SUCCESS;}}3. Add teacher two methods that need to be practiced add,deete
Package Cn.cqvie.wildcard; Import Com.opensymphony.xwork2.ActionSupport; Public class extends actionsupport { public String Add () {return SUCCESS;} Public String Delete () {return SUCCESS;}}This allows you to create a new two JSP page to display the results of the run
4. New studentadd_success.jsp: Note that the student here must be capitalized, just write a word in the body
<body>Student Add Success! <br></body>
5. New studentdelete_success.jsp: Note that the student here must be capitalized, just write a word in the body
<body>student Delete success!<br></body>
6. New teacher_add_success.jsp: Note that the T must be capitalized, just write a word in the body
<body>Teacher Add SUCCESS!<br></body>
7. New teacher_delete_success.jsp: Note that the T must be capitalized, just write a word in the body
<body>Teacher Delete Success! <br></body>
8. Configure the contents of the Struts.xml file: * * *
<?xml version= "1.0" encoding= "UTF-8"? ><! DOCTYPE struts Public "-//apache software foundation//dtd struts Configuration 2.1//en" "http://struts.apache.org/dtds/ Struts-2.1.dtd "><struts><constant name=" Struts.devmode "value=" true "/> < Package Extendsclassclass= "Cn.cqvie.wildcard. {1} Action "method=" {2} "><result >/{1}_{2}_success.jsp</result></action></ Package ></struts>9. "*" Here represents all, that is, all methods that student has, {1}= "*", that is, "{1}" means "add" when "*" stands for "add". This means that "*" is consistent with the "{}" content.
"*_*" stands for: the first "*" stands for "Teacher"; the second "*" represents the "add" method or the "delete" method.
10. Modify the mapping in Web. xml: You need to change the Url-pattern original "*.action" to "/*", otherwise you cannot find the method corresponding to the actions.
<filter-mapping><filter-name>struts2</filter-name><url-pattern>/*</ Url-pattern></filter-mapping></web-app>
11. Run/debug, deploy the project on Tomcat, open the browser in the Address bar to enter the name of the item, enter, separate points "add student", "delete student", "Add Teacher", "delete teacher" can successfully jump to the page
12 Summary: Pay attention to the case of letters, when configuring the "Struts.xml" file, the corresponding "action" action to be consistent with, follow the "Convention better than the configuration" principle
Use of wildcard characters
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