Struts2--通过Action来获取表单的三种方式

action获取表单提交的数据主要的三种方式

(1）使用 actionContext类

(2) 使用ServletActionContext类

（3）使用接口注入的方式

 

一、使用actionContext类

package com.tui;

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

import org.apache.struts2.dispatcher.Parameter;

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

public class Form1DemoAction extends ActionSupport {
  @Override
public String execute() throws Exception {
	// TODO 自动生成的方法存根
  ActionContext actionContext=       ActionContext.getContext();
  Mapmap= actionContext.getParameters();
   Setkeys=map.keySet();
   for(String key:keys)
   {
	   Parameter objects=map.get(key);
	System.out.println( objects.getValue());  
   }
  return NONE;
         
}
}

二、使用ServletActionContext类

package com.tui;

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

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.dispatcher.Parameter;

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

public class Form1DemoAction2 extends ActionSupport {
  @Override
public String execute() throws Exception {
	// TODO 自动生成的方法存根
	   HttpServletRequest httpServletRequest=   ServletActionContext.getRequest();
	      String username=httpServletRequest.getParameter("uname");
	      String upassword=httpServletRequest.getParameter("upassword");
	      String uaddress=httpServletRequest.getParameter("uaddress");
         System.out.println(username+":"+upassword+":"+uaddress);
	   return NONE;
}
}

三、实现ServletRequestAware接口

package com.tui;

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

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;
import org.apache.struts2.dispatcher.Parameter;
import org.apache.struts2.interceptor.ServletRequestAware;

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

public class Form1DemoAction3 extends ActionSupport implements ServletRequestAware {
  private HttpServletRequest request;

@Override
public void setServletRequest(HttpServletRequest request) {
	// TODO 自动生成的方法存根
	this.request=request;
}
	@Override
public String execute() throws Exception {
	// TODO 自动生成的方法存根
	    String username=request.getParameter("uname");
	    String userpassword=request.getParameter("upassword");
	    String  useraddress=request.getParameter("uaddress");
	    System.out.println(username+":" +userpassword+":"+useraddress);
	    
	   return NONE;
}

}

struts2.xml配置

实现结果: