Struts2 核心知识

Strust2 get/set 自动获得/设置数据

1.自定义action ，添加属性

public class HelloStuts2Action implements Action{
    
    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

2.跳转新jsp页面，调用属性name

<body>
    ${name}HELLO WORD!
</body>

ActionSupport类引入

public class ActionSupport implements Action, Validateable, ValidationAware, TextProvider, LocaleProvider, Serializable

1.新action继承Actionsupport

public class HelloStuts2Action2 extends ActionSupport{
    
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    @Override
    public String execute() throws Exception {
        System.out.println("执行了 action默认方法");
        // TODO Auto-generated method stub
        return Action.SUCCESS;
    }

}

2.Action设置数据

第一种方式：属性驱动(FieldDriven)

A、基本数据类型属性

public class HelloStuts2Action2 extends ActionSupport{

    private String name;
｝

B、JavaBean 类型属性

public class User {
    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;
    }
    @Override
    public String toString() {
        return "User [name=" + name + ", pwd=" + pwd + "]";
    }
    
}

测试

1.搭建测试环境，新建login页面

login页面

<body>
    <form action="" method="post">
        用户名:<input name="name" type="text" /><p/>
        密    码:<input name="pwd" type="text" /><p/>
        <input type="submit" value="登陆" /><p/>
    </form>
</body>

success页面

<body>
    用户名:${name}
    用户名:${pwd}
</body>

error页面

<body>
    帐号或密码错误！登录失败
</body>

2.配置struts.xml

		<action name="user_login" class="com.lin.action.UserAction">
			<result name="success">succssful.jsp</result>
			<result name="error">error.jsp</result>
		</action>

3.action 逻辑存储

基本数据类型属性：　　　

@Override
    public String execute() throws Exception {

        if (name.equals("lin") && pwd.equals("123")) {
            return Action.SUCCESS;
        }

        return Action.ERROR;
    }

JavaBean 类型属性　　　　

    public String execute() throws Exception {

        LoginSerivce serivce = new LoginSerivce();
        boolean result = serivce.isLogin(new User(name, pwd));
        if (result) {
            return Action.SUCCESS;
        }
        return Action.ERROR;
    }

第二种方式：模型驱动(ModelDriven）只能接受一个bean对象

1.实现接口

public class UserAction extends ActionSupport implements ModelDriven<User>{

2.重新getmodel方法

    User user = new User();
    @Override
    public User getModel() {
        return user;
    }

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