Struts2基础学习2

时间：2023-03-08 21:45:17

Struts2基础学习2

项目结构，测试页面与实体类

Struts2基础学习2

<%@ 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>

    request: ${requestScope.name}<br>

    session:${sessionScope.name}<br>

    application:${applicationScope.name}<br>

</body>

</html>

api

<%@ 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}/Demo3Action">

        用户名:<input type="text" name="name" /><br>

        年龄:<input type="text" name="age" /><br>

        生日:<input type="text" name="birthday" /><br>

        <input type="submit" value="提交" />

    </form>

</body>

</html>

form1

<%@ 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}/Demo4Action">

        用户名:<input type="text" name="user.name" /><br>

        年龄:<input type="text" name="user.age" /><br>

        生日:<input type="text" name="user.birthday" /><br>

        <input type="submit" value="提交" />

    </form>

</body>

</html>

form2

<%@ 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}/Demo5Action">

        用户名:<input type="text" name="name" /><br>

        年龄:<input type="text" name="age" /><br>

        生日:<input type="text" name="birthday" /><br>

        <input type="submit" value="提交" />

    </form>

</body>

</html>

form3

<%@ 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}/Demo6Action" method="post" >

        list:<input type="text" name="list" /><br>

        list:<input type="text" name="list[3]" /><br>

        map:<input type="text" name="map['key']" /><br>

        <input type="submit" value="提交" />

    </form>

</body>

</html>

form4

package com.struts2.pojo;

import java.util.Date;

/**

 * @author: 肖德子裕

 * @date: 2018/11/20 18:39

 * @description:

 */

public class User {

    private String name;

    private Integer age;

    private Date birthday;

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public Integer getAge() {

        return age;

    }

    public void setAge(Integer age) {

        this.age = age;

    }

    public Date getBirthday() {

        return birthday;

    }

    public void setBirthday(Date birthday) {

        this.birthday = birthday;

    }

    @Override

    public String toString() {

        return "User [name=" + name + ", age=" + age + ", birthday=" + birthday + "]";

    }

}

User

测试Struts2的重定向与转发

package com.struts2.action;

import com.opensymphony.xwork2.ActionSupport;

/**

 * @author: 肖德子裕

 * @date: 2018/11/20 10:25

 * @description: 测试重定向与转发

 * 之所以继承ActionSupport类，是因为该类实现了很多接口，我们可以直接使用

 */

public class Demo1Action extends ActionSupport {

    public String index() throws Exception{

        System.out.println("hello1");

        return SUCCESS;

    }

    public String index2() throws Exception{

        System.out.println("hello2");

        return SUCCESS;

    }

    public String index3() throws Exception{

        System.out.println("hello3");

        return SUCCESS;

    }

    public String index4() throws Exception{

        System.out.println("hello4");

        return SUCCESS;

    }

}

Demo1Action

测试Struts2获取servlet api

package com.struts2.action;

import com.opensymphony.xwork2.ActionContext;

import com.opensymphony.xwork2.ActionSupport;

import org.apache.struts2.ServletActionContext;

import java.util.Map;

/**

 * @author: 肖德子裕

 * @date: 2018/11/20 14:05

 * @description: 测试struts2获取原生servlet api

 * 每次请求都会创建一个ActionContext对象(数据中心)，请求结束时销毁

 * 可以通过该对象获取servlet api

 * 也可以通过ServletActionContext对象获取api(不推荐)

 * 也可以通过实现相应的接口获取(不推荐)

 * 3种方式都是从ActionContext中获取相应api

 */

public class Demo2Action extends ActionSupport {

    /**

     * 在本地线程ThreadLocal上绑定了创建的ActionContext对象

     */

    public String test() throws Exception{

        //获取request(不推荐使用)

        Map<String, Object> requestScope = (Map<String, Object>) ActionContext.getContext().get("request");

        //可以直接保存值到request(推荐)

        ActionContext.getContext().put("name","request");

        //获取session

        Map<String, Object> sessionScope = ActionContext.getContext().getSession();

        sessionScope.put("name","session");

        //获取application

        Map<String, Object> applicationScope = ActionContext.getContext().getApplication();

        applicationScope.put("name","application");

        return SUCCESS;

    }

}

Demo2Action

测试Struts2获取参数的方式

package com.struts2.action;

import com.opensymphony.xwork2.ActionSupport;

import java.util.Date;

/**

 * @author: 肖德子裕

 * @date: 2018/11/20 14:39

 * @description: 测试struts2属性获取参数

 * 每次请求都会创建一个新的action实例对象

 * servlet是线程不安全的；action是线程安全的，可以使用成员变量接收参数

 * 参数支持自动转换，如字符串转日期，字符串转int

 */

public class Demo3Action extends ActionSupport {

    private String name;

    private Integer age;

    private Date birthday;

    public Integer getAge() {

        return age;

    }

    public void setAge(Integer age) {

        this.age = age;

    }

    public Date getBirthday() {

        return birthday;

    }

    public void setBirthday(Date birthday) {

        this.birthday = birthday;

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getParam(){

        System.out.println(name+" "+age+" "+birthday);

        return SUCCESS;

    }

}

Demo3Action

package com.struts2.action;

import com.opensymphony.xwork2.ActionSupport;

import com.struts2.pojo.User;

/**

 * @author: 肖德子裕

 * @date: 2018/11/20 18:40

 * @description: 测试struts2对象获取参数

 */

public class Demo4Action extends ActionSupport {

    private User user;

    public User getUser() {

        return user;

    }

    public void setUser(User user) {

        this.user = user;

    }

    public String getParam(){

        System.out.println(user);

        return SUCCESS;

    }

}

Demo4Action

package com.struts2.action;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

import com.struts2.pojo.User;

/**

 * @author: 肖德子裕

 * @date: 2018/11/20 18:47

 * @description: 测试struts2模型驱动获取参数

 */

public class Demo5Action extends ActionSupport implements ModelDriven<User> {

    private User user=new User();

    public String getParam(){

        System.out.println(user);

        return SUCCESS;

    }

    @Override

    public User getModel() {

        return user;

    }

}

Demo5Action

package com.struts2.action;

import com.opensymphony.xwork2.ActionSupport;

import java.util.List;

import java.util.Map;

/**

 * @author: 肖德子裕

 * @date: 2018/11/20 19:05

 * @description: 封装集合类型参数

 */

public class Demo6Action extends ActionSupport {

    private List<String> list;

    private Map<String,String> map;

    public List<String> getList() {

        return list;

    }

    public void setList(List<String> list) {

        this.list = list;

    }

    public Map<String, String> getMap() {

        return map;

    }

    public void setMap(Map<String, String> map) {

        this.map = map;

    }

    public String getParams(){

        System.out.println(list);

        System.out.println(map);

        return SUCCESS;

    }

}

Demo6Action

核心配置文件（注意web.xml中要配置过滤器）

<?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>

    <package name="demo1" namespace="/" extends="struts-default" >

        <!-- 测试转发（默认） -->

        <action name="Demo1Action" class="com.struts2.action.Demo1Action" method="index" >

            <result name="success" type="dispatcher" >/index.jsp</result>

        </action>

        <!-- 测试重定向 -->

        <action name="Demo1Action2" class="com.struts2.action.Demo1Action" method="index2" >

            <result name="success" type="redirect" >/index.jsp</result>

        </action>

        <!-- 测试链式转发跳转 -->

        <action name="Demo1Action3" class="com.struts2.action.Demo1Action" method="index3" >

            <result name="success" type="chain" >

                <param name="namspace">/</param>

                <param name="actionName">Demo1Action</param>

            </result>

        </action>

        <!-- 测试链式重定向 -->

        <action name="Demo1Action4" class="com.struts2.action.Demo1Action" method="index4" >

            <result name="success" type="redirectAction" >

                <param name="namspace">/</param>

                <param name="actionName">Demo1Action</param>

            </result>

        </action>

    </package>

    <package name="demo2" namespace="/" extends="struts-default" >

        <!-- 测试获取servlet api -->

        <action name="Demo2Action" class="com.struts2.action.Demo2Action" method="test" >

            <result name="success" type="dispatcher" >/api.jsp</result>

        </action>

    </package>

    <package name="demo3" namespace="/" extends="struts-default" >

        <!-- 测试属性获取参数 -->

        <action name="Demo3Action" class="com.struts2.action.Demo3Action" method="getParam" >

            <result name="success" type="dispatcher" >/form1.jsp</result>

        </action>

    </package>

    <package name="demo4" namespace="/" extends="struts-default" >

        <!-- 测试对象获取参数 -->

        <action name="Demo4Action" class="com.struts2.action.Demo4Action" method="getParam" >

            <result name="success" type="dispatcher" >/form2.jsp</result>

        </action>

    </package>

    <package name="demo5" namespace="/" extends="struts-default" >

        <!-- 测试模型驱动获取参数 -->

        <action name="Demo5Action" class="com.struts2.action.Demo5Action" method="getParam" >

            <result name="success" type="dispatcher" >/form3.jsp</result>

        </action>

    </package>

    <package name="demo6" namespace="/" extends="struts-default" >

        <!-- 测试集合获取参数 -->

        <action name="Demo6Action" class="com.struts2.action.Demo6Action" method="getParams" >

            <result name="success" type="dispatcher" >/form4.jsp</result>

        </action>

    </package>

</struts>

struts2.xml

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