struts2_day02_06-获取表单数据（使用ServletActionContext获取和接口注入）

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使用ServletActionContext类获取

详细代码：

/struts2_day02/WebContent/form2.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 }/form2.action" method="post">username:<input type="text" name="username"><br>password:<input type="text" name="password"><br>address:<input type="text" name="address"><br><input type="submit" value="提交"></form></body></html>

/struts2_day02/src/struts.xml

<?xml version="1.0" encoding="UTF-8"?><!-- struts2约束 start --><!DOCTYPE struts PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN""http://struts.apache.org/dtds/struts-2.3.dtd"><!-- struts2约束 end --><struts><package name="demo1" extends="struts-default" namespace="/"><!-- 全局结果页面配置 --><global-results><result name="success">/hello.jsp</result></global-results><action name="book" class="com.hlg.action.BookAction"><result name="success" type="redirectAction">orders</result></action><action name="orders" class="com.hlg.action.OrdersAction"><!-- <result name="success">/hello.jsp</result> --></action></package><package name="from1action" extends="struts-default" namespace="/"><action name="form1" class="com.hlg.form.Form1DemoAction"></action><action name="form2" class="com.hlg.form.Form2DemoAction"></action></package></struts>

com.hlg.form.Form2DemoAction

package com.hlg.form;import java.util.Arrays;import java.util.Map;import java.util.Set;import javax.servlet.http.HttpServletRequest;import org.apache.struts2.ServletActionContext;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;public class Form2DemoAction extends ActionSupport {public String execute(){//第二种方式 使用ServleActionContext类获取//1 使用ServletActionContext获取request对象HttpServletRequest request = ServletActionContext.getRequest();String username = request.getParameter("username");String password = request.getParameter("password");String address = request.getParameter("address");System.out.println(username);System.out.println(password);System.out.println(address);return NONE;}}

使用接口注入（了解）

1 让action实现接口，为了得到request对象

package com.hlg.form;import javax.servlet.http.HttpServletRequest;import org.apache.struts2.interceptor.ServletRequestAware;import com.opensymphony.xwork2.ActionSupport;public class Form3DemoAction extends ActionSupport implements ServletRequestAware{private HttpServletRequest request;public void setServletRequest(HttpServletRequest request) {this.request = request;}public String execute(){System.out.println("Form3DemoAction...");String username = request.getParameter("username");String password = request.getParameter("password");String address = request.getParameter("address");System.out.println(username);System.out.println(password);System.out.println(address);return NONE;}}

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