keywords: STRUTS2

p.s
struts2包版本的不同会导致不兼容

github:https://github.com/joeytsai03/javaee_test1.git

运行情况

登陆界面
登陆成功界面

整体的目录结构

目录结构

User代码

package com.zy.javaee.domin;

/**
 * Created by Joey_Tsai on 2018/3/9.
 */
public class User {
    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;
    }

    private String username;
    private String password;

}

LoginAction代码

package com.zy.javaee;

import com.opensymphony.xwork2.ActionSupport;
import com.zy.javaee.domin.User;

/**
 * Created by Joey_Tsai on 2018/3/9.
 */
public class LoginAction extends ActionSupport {
    private User user;

    @Override
    public String execute() throws Exception {
        if (getUser().getUsername().equals("admin") && getUser().getPassword().equals("123")) {
            return SUCCESS;
        } else {
            return LOGIN;
        }
    }

    public User getUser() {
        return user;
    }

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

LoginAction-conversion.properties

user=com.zy.javaee.UserConverter

LoginPage

package com.zy.javaee;

import com.opensymphony.xwork2.ActionSupport;

/**
 * Created by Joey_Tsai on 2018/3/9.
 */
public class LoginPage extends ActionSupport {
    @Override
    public String execute() throws Exception {

        return SUCCESS;
    }
}

UserConverter

package com.zy.javaee;

import com.zy.javaee.domin.User;
import ognl.DefaultTypeConverter;

import java.util.Map;

/**
 * Created by Joey_Tsai on 2018/3/9.
 */
public class UserConverter extends DefaultTypeConverter {
    public Object convertValue(Map context, Object value, Class toType){
         /*如果是要转换成User对象*/
        if (toType==User.class) {
            /*页面传递过来的参数被封装成了String[]*/
            String[] params = (String[]) value;
            User user = new User();
            /*取出user字符串，按,分割成数组*/
            String[] uservalues = params[0].split(",");
            user.setUsername(uservalues[0]);
            user.setPassword(uservalues[1]);
            return user;
        }
        /*页面要显示user参数值，则要转换成字符串*/
        else if (toType==String.class) {
            User user =(User)value;
            return "姓名:"+user.getUsername()+", 密码:"+user.getPassword();
        }
        return null;
    }

}

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="default" namespace="/" extends="struts-default">
        <action name="Login" class="com.zy.javaee.LoginAction">
            <result name="success">/success.jsp</result>
            <result name="login">/index.jsp</result>
        </action>
            <action name="LoginPage" class="com.zy.javaee.LoginPage">
                <result name="success">/KK.jsp</result>
            </action>
        </package>
</struts>

xwork-conversion.properties

com.zy.javaee.domin.User=com.zy.javaee.UserConverter

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
    <title>用户登录</title>
</head>
<body>
<h1>用户登录</h1>
<s:form action="Login" method="POST">
    <table>
        <tr>
            <td><s:textfield name="user.username" label="用户名"/>

            </td>
        </tr>
        <tr>
            <td><s:password name="user.password" label="密码"/></td>
        </tr>
        <tr>
            <td colspan="2" style="text-align: center"><s:submit value="登录"/></td>
        </tr>
    </table>
</s:form>
</body>
</html>

KK.jsp

<%--
  Created by IntelliJ IDEA.
  User: Joey_Tsai
  Date: 2018/3/9
  Time: 15:41
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
KK test
</body>
</html>

success.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
<head>
    <title>登录成功</title>
</head>
<body>
<h1><s:property value="user.username"/></h1>
<h4>登录成功！</h4>

</body>
</html>