Struts之获取表单数据

1.ActionContext获取表单数据

form.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
	<form action="${pageContext.request.contextPath}/formAction.action" method="post" enctype="application/x-www-form-urlencoded">
		用户名：<input type="text" name="username"><br/>
		密码：<input type="text" name="password"><br/>
		性别：<input type="radio" name="sex" value="man">男
		<input type="radio" name="sex" value="woman">女<br>
		爱好：<input type="checkbox" name="hobby" value="study">学习
		<input type="checkbox" name="hobby" value="music">音乐
		<input type="checkbox" name="hobby" value="sleep">睡觉<br/>
		<input type="submit" value="提交">
		<input type="reset" value="重置">
	</form>
</body>
</html>

FormAction.java

package zh.action.demo;

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

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

/**
 * 通过ActionContext获取表单数据
 * @author ZH
 *
 */
public class FormAction extends ActionSupport {

	public String params() {
		// 通过ActionContext类的静态方法来获取ActionContext对象
		ActionContext actionContext = ActionContext.getContext();
		// 获取所有的表单数据
		Map<String, Object> parameters = actionContext.getParameters();
		// 遍历表单数据
		Set<Entry<String, Object>> entrySet = parameters.entrySet();
		for (Entry<String, Object> entry : entrySet) {
			String key = entry.getKey();
			Object[] array = (Object[]) entry.getValue();
			System.out.println(key + "=" + Arrays.toString(array));
		}
		return NONE;

	}

}

struts.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
	"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>

	<constant name="struts.i18n.encoding" value="UTF-8"></constant>
	
	<package name="demo1" namespace="/" extends="struts-default">
		<action name="formAction" class="zh.action.demo.FormAction" method="params"></action>
	</package>
	
</struts>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <display-name></display-name>	
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  
 <!--  配置Struts的拦截器 -->
  <filter>
  	<filter-name>struts2</filter-name>
  	<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  <filter-mapping>
  	<filter-name>struts2</filter-name>
  	<url-pattern>/*</url-pattern>
  </filter-mapping>
  
</web-app>

2.ServletActionContext获取表单数据

ServletActionContext类的静态方法如下：

package zh.action.demo;

import java.util.Arrays;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

/**
 * 通过ServletActionContext获取表单数据
 * @author ZH
 */
public class FormAction extends ActionSupport {

	public String params() {
		
		// 获取HttpServletRequest 对象
		HttpServletRequest request = ServletActionContext.getRequest();
		
		// 获取表单数据
		String username = request.getParameter("username");
		String password = request.getParameter("password");
		String sex = request.getParameter("sex");
		String[] hobbyArray = request.getParameterValues("hobby");
		
		System.out.println(username);
		System.out.println(password);
		System.out.println(sex);
		System.out.println(Arrays.toString(hobbyArray));
		
		return NONE;

	}

}

3.接口注入方式获取表单数据

package zh.action.demo;

import java.util.Arrays;

import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.interceptor.ServletRequestAware;
import com.opensymphony.xwork2.ActionSupport;

/**
 * 通过实现ServletRequestAware接口，获取表单数据
 * 
 * @author ZH
 */
public class FormAction extends ActionSupport implements ServletRequestAware {

	private HttpServletRequest request;

	// 重写ServletRequestAware接口中的方法
	public void setServletRequest(HttpServletRequest request) {
		this.request = request;
	}

	public String params() {

		// 获取表单数据
		String username = request.getParameter("username");
		String password = request.getParameter("password");
		String sex = request.getParameter("sex");
		String[] hobbyArray = request.getParameterValues("hobby");

		System.out.println(username);
		System.out.println(password);
		System.out.println(sex);
		System.out.println(Arrays.toString(hobbyArray));

		return NONE;

	}

}

Struts之获取表单数据

1.ActionContext获取表单数据

2.ServletActionContext获取表单数据

3.接口注入方式获取表单数据

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