第七篇——Struts2的接收参数

Struts2的接收参数

1、使用Action的属性接收参数

2、使用Domain Model接收参数

3、使用ModelDriven接收参数

项目实例

1、项目结构

2、pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.ray</groupId>
  <artifactId>struts2Test</artifactId>
  <packaging>war</packaging>
  <version>1.0-SNAPSHOT</version>
  <name>struts2Test Maven Webapp</name>
  <url>http://maven.apache.org</url>

  <dependencies>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>

    <!-- https://mvnrepository.com/artifact/org.apache.struts/struts2-core -->
    <dependency>
      <groupId>org.apache.struts</groupId>
      <artifactId>struts2-core</artifactId>
      <version>2.5.16</version>
    </dependency>

  </dependencies>

  <build>
    <finalName>struts2Test</finalName>
  </build>

</project>

3、web.xml

<web-app 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_3_0.xsd"
         version="3.0" metadata-complete="true">
  <display-name>Archetype Created Web Application</display-name>

  <!-- 过滤所有请求交给Struts2处理 -->
  <filter>
    <filter-name>struts2</filter-name>
    <filter-class>
      org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter
    </filter-class>

     <!--action后缀（方法二）-->
    <!--<init-param>-->
      <!--<param-name>struts.action.extension</param-name>-->
      <!--<param-value>ray</param-value>-->
    <!--</init-param>-->
  </filter>

  <filter-mapping>
    <filter-name>struts2</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

</web-app>

4、User.java

package com.ray.model;

/**
 * Created by Ray on 2018/3/26 0026.
 **/
public class User {

    private String username;
    private String password;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

5、LoginAction1.java

package com.ray.action;

import com.opensymphony.xwork2.ActionSupport;

/**
 * Created by Ray on 2018/3/26 0026.
 * 方式一：使用Action的属性接收参数
 **/
public class LoginAction1 extends ActionSupport {

    private String username;
    private String password;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String login(){
        System.out.println("username = " + username);
        System.out.println("password = " + password);

        return SUCCESS;
    }
}

6、LoginAction2.java

package com.ray.action;

import com.opensymphony.xwork2.ActionSupport;
import com.ray.model.User;

/**
 * Created by Ray on 2018/3/26 0026.
 * 方式二：使用Domain Model接收参数
 **/
public class LoginAction2 extends ActionSupport {

    private User user;

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public String login(){
        System.out.println("username = " + user.getUsername());
        System.out.println("password = " + user.getPassword());

        return SUCCESS;
    }
}

7、LoginAction3.java

package com.ray.action;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.ray.model.User;

/**
 * Created by Ray on 2018/3/26 0026.
 * 方式三：使用ModelDriven接收参数
 **/
public class LoginAction3 extends ActionSupport implements ModelDriven<User>{

    private User user = new User();

    public User getModel() {
        return user;
    }

    public String login(){
        System.out.println("username = " + user.getUsername());
        System.out.println("password = " + user.getPassword());

        return SUCCESS;
    }
}

8、seventh-struts.xml

<?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>

    <package name="login1" extends="struts-default" namespace="/">
        <action name="login1" class="com.ray.action.LoginAction1" method="login">
            <result>/success.jsp</result>
        </action>
    </package>

    <package name="login2" extends="struts-default" namespace="/">
        <action name="login2" class="com.ray.action.LoginAction2" method="login">
            <result>/success.jsp</result>
        </action>
    </package>

    <package name="login3" extends="struts-default" namespace="/">
        <action name="login3" class="com.ray.action.LoginAction3" method="login">
            <result>/success.jsp</result>
        </action>
    </package>
</struts>

9、struts.xml

<?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>

    <!-- action后缀（方法一） -->
    <!--<constant name="struts.action.extension" value="ra"/>-->

    <package name="default" namespace="/" extends="struts-default">
        <!-- 默认action -->
        <default-action-ref name="404"/>
        <action name="404">
            <result>/404.jsp</result>
        </action>

        <action name="helloWorld" class="com.ray.action.HelloWorldAction">
            <result name="success">/success.jsp</result>
        </action>

    </package>

    <include file="second-struts.xml"/>
    <include file="third-struts.xml"/>
    <include file="fourth-struts.xml"/>
    <include file="seventh-struts.xml"/>
</struts>

10、login1.jsp

<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" %>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">

    <title>用户登录1</title>

    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

</head>

<body>
    <s:form action="login1" method="POST">
        <s:textfield label="用户名：" name="username"/><br>
        <s:password label="密码：" name="password"/><br>
        <s:submit label="登录"/><s:reset label="重置"/>
    </s:form>
</body>
</html>

11、login2.jsp

<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" %>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">

    <title>用户登录2</title>

    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

</head>

<body>
    <s:form action="login2" method="POST">
        <s:textfield label="用户名：" name="user.username"/><br>
        <s:password label="密码：" name="user.password"/><br>
        <s:submit label="登录"/><s:reset label="重置"/>
    </s:form>
</body>
</html>

12、login3.jsp

<%@ taglib prefix="s" uri="/struts-tags" %>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" %>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">

    <title>用户登录3</title>

    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

</head>

<body>
    <s:form action="login3" method="POST">
        <s:textfield label="用户名：" name="username"/><br>
        <s:password label="密码：" name="password"/><br>
        <s:submit label="登录"/><s:reset label="重置"/>
    </s:form>
</body>
</html>

13、success.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8" %>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">

    <title>success.jsp</title>

    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->

</head>

<body>
    Hello World~
    登录成功
</body>
</html>

14、页面效果

ok!