Struts入门

最新推荐文章于 2021-02-24 10:57:44 发布

原创最新推荐文章于 2021-02-24 10:57:44 发布 · 175 阅读

CC 4.0 BY-SA版权

1.Struts环境搭建

1.1：在昨天的前提下加入Struts的依赖

<dependency>
			<groupId>org.apache.struts</groupId>
			<artifactId>struts2-core</artifactId>
			<version>2.5.13</version>
</dependency>

1.2：接下来我们加入struts的配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
	"-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
	"http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
	<include file="struts-default.xml"></include>
	<include file="struts-base.xml"></include>
	<include file="struts-sy.xml"></include>
</struts>

1.3：然后再web.xml中配置

 <filter>
  	<filter-name>struts</filter-name>
  	<filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
  </filter>
  
  <filter-mapping>
  	<filter-name>struts	</filter-name>
  	<url-pattern>*.action</url-pattern>
  </filter-mapping>

2.Struts方法的调用

2.1:案例
创建一个类HelloActon


package com.yinyi.web;

import javax.servlet.http.HttpServletRequest;

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

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ModelDriven;
import com.yinyi.entity.Cal;

public class HelloActon implements ModelDriven<Cal>,ServletRequestAware{
	//注入耦合
	private HttpServletRequest req;
	private Cal cal1 = new Cal();
	private Cal cal2;
	private String sex;
	
	
	public Cal getCal2() {
		return cal2;
	}

	public void setCal2(Cal cal2) {
		this.cal2 = cal2;
	}

	public String getSex() {
		return sex;
	}

	public void setSex(String sex) {
		this.sex = sex;
	}

	public String add() {
		System.out.println("调用add方法、、、、、、");
		return "rs";
	}
	
	public String del() {
		System.out.println("调用del方法、、、、、、");
		return "rs";
	}
	
	public String accept1() {
		System.out.println("cal1："+cal1);
//		req.setAttribute("cal1",cal1);
//		非注入耦合
		HttpServletRequest request = ServletActionContext.getRequest();
		request.setAttribute("cal1",cal1);
		
//		非注入解耦
		ActionContext context = ActionContext.getContext();
		context.get("........");
		return "rs";
	}
	
	/**
	 * 类实例，属性名  接收参数值
	 * @return
	 */
	public String accept2() {
		System.out.println("cal2:"+cal2);
		return "rs";
	}
	
	/**
	 * set/get 接收参数值
	 * @return
	 */
	public String accept3() {
		System.out.println(sex);
		return "rs";
	}

	@Override
	public Cal getModel() {
		return cal1;
	}


	@Override
	public void setServletRequest(HttpServletRequest req) {
		this.req = req;
		
	}
	
}

2.2：然后创建一个demo1.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>
<h3>动态方法调用</h3>
<a href="${pageContext.request.contextPath }/sy/demo_add.action">新增</a>
<a href="${pageContext.request.contextPath }/sy/demo_del.action">删除</a>

<h3>后台接收jsp传递参数的三种方式</h3>
<a href="${pageContext.request.contextPath }/sy/demo_accept1.action?num1=20&&num2=5">accept1</a>
<a href="${pageContext.request.contextPath }/sy/demo_accept2.action?cal2.num1=20&&cal2.num2=5">accept2</a>
<a href="${pageContext.request.contextPath }/sy/demo_accept3.action?sex=nv">accept3</a>

</body>
</html>

3.Struts参数的传递

3.1：分为注入和非注入（在创建的HelloActon可以查看）
注入：通过ServletRequestAware接口
非注入：在方法中通过ServletActionContext.getReques接口

3.2在jsp界面测试

<%@ 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>
结果页:${sex }
<br>
${cal1 }
${cal2 }
</body>
</html>