【struts2】取值

1.获取Action类中的属性值

Action类：LoginTest.java

package test;

public class LoginTest {
    private String userName = "";
    private String passWord = "";

    public String execute() {
        if(this.userName .equals( this.passWord))
            return "SUCCESS";
        else return "ERROR";
    }

    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;
    }

}

测试主页index.jsp

<body>
<s:form action="/logintest.action">
    <s:textfield name="userName" label="UserName"></s:textfield>
    /*此处name值要和Action类中的对应的属性名称相同，且必须有该属性的getter和setter方法*/
    <s:password name="passWord" label="PassWord"></s:password>          
    <s:submit value="Click Here"></s:submit> 
</s:form> 
</body>

测试登陆成功页面test.jsp

<body>
<h1>Hello ,<s:property value="userName"/> </h1>
</body>

（引用标签：<%@ taglib prefix="s" uri="/struts-tags"%>）

这里写图片描述
点击按钮跳转到test.jsp

2. pageContext, request, session、application四大作用域中获取值

在Action类中实现SessionAware 接口：

public class SessionTest1Action extends ActionSupport implements SessionAware {  
    private Map session;  
    public void setSession(Map session) {  
        this.session = session;  
    }  
    public String execute() {  
        this.session.put("username", "ABC");  
        return SUCCESS;  
    }  
}

jsp页面取值：

<s:property value="#session.username"/>