上一篇介绍了struts使用的四个步骤。
其中在开发action的时候，可以有三种实现方式：
1，写一个类，继承与ActionSupport
2，写一个类，实现Action接口
3，写一个类，实现业务方法，既不继承ActionSupport，也不实现Action接口
一，继承ActionSupport
package gy.actions;
import com.opensymphony.xwork2.ActionSupport;
public class UserAction extends ActionSupport {
private static final long serialVersionUID = 1L;
public String login() {
System.out.println("login funciton called");
return SUCCESS;
}
}
对应的配置
<action name="user_*" class="gy.actions.UserAction" method="{1}">
<result name="success">/success.html</result>
<result name="error">/fail.html</result>
</action>
二，实现Action接口
package gy.actions;
import com.opensymphony.xwork2.Action;
public class UserActionSecond implements Action {
@Override
public String execute() throws Exception {
System.out.println("second action implement function called.");
return SUCCESS;
}
}
对应的配置
<action name="user_second" class="gy.actions.UserActionSecond">
<result name="success">/success.html</result>
<result name="error">/fail.html</result>
</action>
可以看到，不用配置method属性。因为是实现了Action接口，方法名固定
三，不继承也不实现
package gy.actions;
public class UserActionThird {
public String login() {
System.out.println("third function called");
return "success";
}
}
对应的配置
<action name="user_third" class="gy.actions.UserActionThird" method="login">
<result name="success">/success.html</result>
<result name="error">/fail.html</result>
</action>