struts2笔记04-XxxAware接口

1、XxxAware接口

     ApplicationAware, RequestAware,SessionAware, ParameterAware.

     struts2提供了这四个Aware接口用于Action类的实现，从而注入对应的application、request、session，parameter, 不过它们都是Map类型的。这和ActionContext一样是解耦的，即没有引入servlet相关的包，是在struts2内部的。

     通过XxxAware接口的实现，可以方便的获取web资源。

2、测试代码

package com.test.action;

import java.util.Map;

import org.apache.struts2.interceptor.ApplicationAware;
import org.apache.struts2.interceptor.ParameterAware;
import org.apache.struts2.interceptor.RequestAware;
import org.apache.struts2.interceptor.SessionAware;

public class TestAwareAction implements ApplicationAware, RequestAware,
		SessionAware, ParameterAware {
	public String execute() {
		// 1、application

		application.put("applicationKey", "applicationValue");
		System.out.println(application.get("date"));

		// 2、session

		session.put("sessionKey", "sessionValue");

		// 3、request

		request.put("requestKey", "requestValue");

		// 4、parameters
		String[] vArr = (String[]) parameters.get("name");
		System.out.println(vArr[0]);

		return "success";
	}

	private Map<String, Object> application;

	@Override
	public void setApplication(Map<String, Object> application) {
		this.application = application;
	}

	private Map<String, String[]> parameters;

	@Override
	public void setParameters(Map<String, String[]> parameters) {
		this.parameters = parameters;
	}

	private Map<String, Object> session;

	@Override
	public void setSession(Map<String, Object> session) {
		this.session = session;
	}

	private Map<String, Object> request;

	@Override
	public void setRequest(Map<String, Object> request) {
		this.request = request;
	}
}