1. servletactioncontext

通过 servletactioncontext 类来访问 httpservletresponse 。

package com.h3.common.action;

import javax.servlet.http.httpservletresponse;
import org.apache.struts2.servletactioncontext;

public class localeaction{
	//business logic
	public string execute() {
		httpservletresponse response = servletactioncontext.getresponse();
		
		return "success";
	}
}

2. servletresponseaware

package com.h3.common.action;

import java.util.locale;
import javax.servlet.http.httpservletresponse;
import org.apache.struts2.interceptor.servletresponseaware;

public class localeaction implements servletresponseaware{

	httpservletresponse response;
	
	//business logic
	public string execute() {
		locale locale = getservletresponse().getlocale();
		return "success";
	}

	public void setservletresponse(httpservletresponse response) {
		this.response = response;
	}
	public httpservletresponse getservletresponse() {
		return this.response;
	}	
} 

这两个机制都可以得到同样 httpservletresponse 对象，但 struts2 文档推荐使用 servletresponseaware，请参见下面的参考资料：

参考

1. http://struts.apache.org/2.x/docs/how-can-we-access-the-httpservletresponse.htmll
2. http://struts.apache.org/2.1.2/struts2-core/apidocs/org/apache/struts2/interceptor/servletresponseaware.htmll