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;

	}

}