struts2（数据传输）

public class BookAction extends ActionSupport {

	@Override
	public String execute() throws Exception {
		return "success";
	}
}

public class OrdersAction extends ActionSupport {

	@Override
	public String execute() throws Exception {
		return "success";
	}
}

package cn.itcast.form;

import java.util.Map;
import java.util.Set;

import org.apache.catalina.tribes.util.Arrays;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class Form1DemoAction extends ActionSupport {

	public String execute() throws Exception {
		//第一种方式 使用ActionContext类获取
		//1 获取ActionContext对象
		ActionContext context = ActionContext.getContext();
		//2 调用方法得到表单数据
		// key是表单输入项name属性值，value是输入的值
		Map<String, Object> map = context.getParameters();
		
		Set<String> keys = map.keySet();
		for (String key : keys) {
			//根据key得到value
			//数组形式：因为输入项里面可能有复选框情况
			Object[] obj = (Object[]) map.get(key);
			System.out.println(Arrays.toString(obj));
		}
		//不返回可以写NONE
		return NONE;
	}
}

package cn.itcast.form;

import java.util.Map;
import java.util.Set;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.apache.catalina.tribes.util.Arrays;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class Form2DemoAction extends ActionSupport {

	public String execute() throws Exception {
		//第一种方式 使用ServletActionContext类获取
		//1 使用ServletActionContext获取request对象
		HttpServletRequest request = ServletActionContext.getRequest();
		//2 调用request里面的方法得到结果
		String username = request.getParameter("username");
		String password = request.getParameter("password");
		String address = request.getParameter("address");
		
		System.out.println(username+":"+password+":"+address);
		

		
		return NONE;
	}
}

package cn.itcast.form;

import java.util.Map;
import java.util.Set;

import javax.servlet.http.HttpServletRequest;

import org.apache.catalina.tribes.util.Arrays;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.interceptor.ServletRequestAware;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
/**
 * 使用接口注入方式
 * @author asus
 *
 */
public class Form3DemoAction extends ActionSupport implements ServletRequestAware {

	private HttpServletRequest request ;
	@Override
	public void setServletRequest(HttpServletRequest request) {
		this.request = request;
	}
	
	public String execute() throws Exception {
		request.getParameter("");
		
		return NONE;
	}


}

package cn.itcast.form;

import java.util.Map;
import java.util.Set;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;

import org.apache.catalina.tribes.util.Arrays;
import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class Form2DemoAction extends ActionSupport {

	public String execute() throws Exception {

		//操作三个域对象
		//1 request域
		HttpServletRequest request = ServletActionContext.getRequest();
		request.setAttribute("req", "reqValue");
		
		//2 session域
		HttpSession session = request.getSession();
		session.setAttribute("sess", "sessValue");
		
		//3 ServletContext域
		ServletContext context = ServletActionContext.getServletContext();
		context.setAttribute("contextname", "contextValue");
		
		return NONE;
	}
}

package cn.itcast.data;

import com.opensymphony.xwork2.ActionSupport;
/**
 * 使用属性封装获取表单数据
 * @author asus
 *
 */
public class DataDemo1Action extends ActionSupport {

	//1 定义变量
	//变量的名称和表单输入项name属性值一样
	private String username;
	private String password;
	private String address;
	
	//2 生成变量的set和get方法
	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}
	
	@Override
	public String execute() throws Exception {
		System.out.println(username+":"+password+":"+address);
		return NONE;
	}


}

package cn.itcast.data;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;

import cn.itcast.entity.User;
/**
 * 使用模型驱动获取表单数据
 * @author asus
 *
 */
public class DataDemo2Action extends ActionSupport implements ModelDriven<User>{

	//创建对象
	//前提要求： 表单输入项name属性值 和 实体类属性名称一样
	private User user = new User();
	public User getModel() {
		//返回创建user对象
		return user;
	}

	@Override
	public String execute() throws Exception {
		
		System.out.println(user);
		return NONE;
	}

}

package cn.itcast.data;

import com.opensymphony.xwork2.ActionSupport;

import cn.itcast.entity.Book;
import cn.itcast.entity.User;
/**
 * 使用表达式封装数据到实体类对象
 * @author asus
 *
 */
public class DataDemo3Action extends ActionSupport {

	//1 声明实体类
	private User user;
	//2 生成实体类变量的set和get方法
	public User getUser() {
		return user;
	}
	public void setUser(User user) {
		this.user = user;
	}

	@Override
	public String execute() throws Exception {
		System.out.println(user);
		return NONE;
	}

}

package cn.itcast.data;

import java.util.List;

import com.opensymphony.xwork2.ActionSupport;

import cn.itcast.entity.User;
/**
 * 封装数据到list集合
 * @author asus
 *
 */
public class ListAction extends ActionSupport {

	// 1 声明List变量
	private List<User> list;
	// 2 生成get和set方法
	public List<User> getList() {
		return list;
	}
	public void setList(List<User> list) {
		this.list = list;
	}

	@Override
	public String execute() throws Exception {
		System.out.println(list);
		return NONE;
	}


}

package cn.itcast.data;

import java.util.Map;

import com.opensymphony.xwork2.ActionSupport;

import cn.itcast.entity.User;
/**
 * 封装数据到map集合
 * @author asus
 *
 */
public class MapAction extends ActionSupport {

	// 1 声明map集合
	private Map<String,User> map;
	public Map<String, User> getMap() {
		return map;
	}
	public void setMap(Map<String, User> map) {
		this.map = map;
	}


	@Override
	public String execute() throws Exception {
		System.out.println(map);
		return NONE;
	}


}