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;
}
}