Struts2初步接触

时间：2023-01-31 09:52:26

  使用idea快速搭建Struts2的Maven项目 

  首先使用intelij idea部署Maven项目

1.jar包引入 pom.xml

我们用的是阿里云

我用的是最新版的Struts2核心jar包和最新版的xwork jar包

只需引入这两个节点

        <dependency>

          <groupId>org.apache.struts</groupId>

          <artifactId>struts2-core</artifactId>

          <version>2.5.8</version>

        </dependency>

        <dependency>

          <groupId>org.apache.struts.xwork</groupId>

          <artifactId>xwork-core</artifactId>

          <version>2.3.8</version>

        </dependency>

 

2.接下来书写web.xml

直接上全部代码

<!DOCTYPE web-app PUBLIC

 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"

 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>

  <display-name>Archetype Created Web Application</display-name>

    <filter>

        <filter-name>struts2</filter-name>

        <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>

    </filter>

    <filter-mapping>

        <filter-name>struts2</filter-name>

        <url-pattern>/*</url-pattern>

    </filter-mapping>

    <welcome-file-list>

   <welcome-file>index.jsp</welcome-file>

 </welcome-file-list>

</web-app>

 

 

3.然后就是jsp页面的书写了（View视图书写），我用了两个页面，一个登陆页面，一个登陆成功页面

这是登陆页面，附加说明。我引入了javaee的jar包，不然

<%

    String path = request.getContextPath();

    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>
这会报错的。还有一种解决办法，就是在服务器引入Servletjar包
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%

    String path = request.getContextPath();

    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<%@ page isELIgnored="false"%>

<%@taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

    <title>登录</title>

    <h1>登录</h1>

    <s:form action="LoginAction" namespace="/" method="POST">

        <s:textfield name="users.name"></s:textfield><s:fielderror fieldName="ename"></s:fielderror><br/>

        <s:textfield name="users.pwd"></s:textfield><s:fielderror fieldName="epwd"></s:fielderror><br/>

        <s:submit value="登录"></s:submit>

    </s:form>

<s:debug></s:debug>

</head>

<body>

</body>

</html>

这是成功页面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%

    String path = request.getContextPath();

    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";

%>

<%@ page isELIgnored="false"%>

<%@taglib prefix="s" uri="/struts-tags" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<html>

<head>

    <title>成功</title>

</head>

<body>

<h1>登录成功欢迎${name}您的密码是${pwd}</h1>

</body>

</html>

 

4.书写我们的Action

package cn.curry.entity;

import com.opensymphony.xwork2.Action;

import com.opensymphony.xwork2.ActionContext;

import com.opensymphony.xwork2.ActionSupport;

import org.apache.struts2.ServletActionContext;

import org.apache.struts2.interceptor.SessionAware;

import javax.servlet.http.HttpSession;

import java.util.Map;

/**

 * Created by Curry on 2017/2/27.

 */

public class LoginAction extends ActionSupport {//还可以实现 Action

    private Users users;//实体po

    private Map<String,Object> map;

    //效验

    public void validate(){

        if(users.getName().length()==0){

            addFieldError("ename","用户名不为空");

        }

        if(users.getPwd().length()==0){

            addFieldError("epwd","密码不为空");

        }

    }

    //使用Servlet API去向Session中放入数据

    public String execute() throws Exception {

        if (users.getName().equals("admin")&&users.getPwd().equals("1")){

            //解耦

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

            session.put("name",users.getName());

            session.put("pwd",users.getPwd());

            //解耦2

            /*map.put("name",users.getName());

            map.put("pwd",users.getPwd());*/

            //耦合

            /*HttpSession session = ServletActionContext.getRequest().getSession();

            session.setAttribute("name",users.getName());

            session.setAttribute("pwd",users.getPwd());*/

            return SUCCESS;//常亮

        }else{

            return INPUT;

        }

    }

    public Users getUsers() {

        return users;

    }

    public void setUsers(Users users) {

        this.users = users;

    }

    public void setSession(Map<String, Object> session) {

        this.map=session;

    }

}

4.1实体类

package cn.curry.entity;

/**

 * Created by Curry on 2017/2/27.

 */

public class Users {

    private String name;

    private String pwd;

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public String getPwd() {

        return pwd;

    }

    public void setPwd(String pwd) {

        this.pwd = pwd;

    }

}

 

5.在classpath，写一个名称为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>

    <constant name="struts.enable.DynamicMethodInvocation" value="true"/>

    <constant name="struts.devMode" value="true"/>

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

        <action name="LoginAction" class="cn.curry.entity.LoginAction">

            <result name="success">success.jsp</result>

            <result name="login">index.jsp</result>

            <result name="input">index.jsp</result>

        </action>

    </package>

</struts>

 

6.部署运行，笔者使用的事Tomcat8,jdk事1.8

Struts2初步接触

Struts2初步接触

Struts2初步接触

Struts2初步接触

页面效果如上图

第一次使用Struts2来写一个小例子，遇到问题也比较多。很多都是jar包问题，再加上idea用的不熟（之前用myeclipse），波折颇多，最后圆满成功。

 

 

 

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