struts2在配置文件与JSP中用OGNL获取Action属性

参考:Struts与OGNL结合

struts2在配置文件中可以调用Action的属性,在JSP页面也可以取出Action的属性值(前提是属性有get,set方法)。

第一个例子:

1.Action中

//文件下载名
    public String getDownloadFileName(){
        String downloadFileName = "";
        String filename = fileName + ".xls";
        try {
            downloadFileName = URLEncoder.encode(filename,"UTF-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return downloadFileName;
    }

2.配置文件中filename="${downloadFileName}"调用Action中的属性

<!-- 文件Excel模板下载 -->
        <action name="exportWebExcel" class="Action.Excel.ExportWebExcel">
            <result type="stream">
                <!-- 其他的参数在类中设置或者使用默认 -->
                <param name="contentType">application/octet-stream</param>
                <param name="inputName">inputStream</param>
                <param name="contentDisposition">attachment;filename="${downloadFileName}"</param>
                <param name="bufferSize">8192</param>
            </result>
        </action>

第二个例子:

Action

package Demo1;

import javax.print.attribute.standard.RequestingUserName;
import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

import utils.CheckCookie;

/**
 * Demo1主页，访问主页要先验证cookie
 *
 * @author: qlq
 * @date : 2017年8月29日下午12:02:31
 */
public class Demo1Action extends ActionSupport {

    private String gotoUrl;

    public String getGotoUrl() {
        return gotoUrl;
    }

    public void setGotoUrl(String gotoUrl) {
        this.gotoUrl = gotoUrl;
    }

    @Override
    public String execute() throws Exception {
        HttpServletRequest request = ServletActionContext.getRequest();
        if (CheckCookie.checkCookie(request))
            return SUCCESS;
        // 登陆失败后将gotoUrl写到JSP页面
        gotoUrl = "/demo1/main.action";
        return LOGIN;
    }

}

配置文件中:

    <package name="sso" namespace="/sso" extends="struts-default">
        <action name="login" class="SSOAction.LoginAction">
            <result name="success" type="redirect">${gotoUrl}</result>
        </action>
    </package>

例子3:   JSP页面中取出Action属性

属性有get,set方法即可，在JSP页面中也可以用OGNL表达式取出属性值，struts会将当前Action对象的属性放入值栈。

package Demo2;

import javax.print.attribute.standard.RequestingUserName;
import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

import utils.CheckCookie;

/**
 * Demo2主页，访问主页要先验证cookie
 *
 * @author: qlq
 * @date : 2017年8月29日下午12:02:31
 */
public class Demo2Action extends ActionSupport {

    private String gotoUrl;

    public String getGotoUrl() {
        return gotoUrl;
    }

    public void setGotoUrl(String gotoUrl) {
        this.gotoUrl = gotoUrl;
    }

    @Override
    public String execute() throws Exception {
        HttpServletRequest request = ServletActionContext.getRequest();
        if (CheckCookie.checkCookie(request))
            return SUCCESS;
        // 登陆失败后将gotoUrl写到JSP页面
        gotoUrl = "/demo2/main.action";
        return LOGIN;
    }

}

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" alt="" />

 -------------struts只写get方法，不写属性名字用${属性名}也会调用get方法-------------------

 struts只写一个get方法，不写属性名，也可以获取到get方法返回的值，由此可见${name}是调用getName()方法。

 例一:

类中只有getTest方法:

package cn.xm.exam.action.exam.exam;
/**
 * 增加考试Action
 *
 * @author QiaoLiQiang
 * @time 2017年10月14日下午4:55:27
 */
@Controller
@Scope("prototype")
@SuppressWarnings("all")
public class Test2Action extends ActionSupport {

    public String getTest() {
        return "这个是只有get方法";
    }

    @Override
    public String execute() throws Exception {
        return super.execute();
    }
}

配置文件:

        <action name="test" class="test2Action">
            <result name="success" type="json">
                <param name="root">test</param>
            </result>
        </action>

测试:

例子二:

将上面类进行改造:

package cn.xm.exam.action.exam.exam;

import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;

import com.opensymphony.xwork2.ActionSupport;

/**
 * 增加考试Action
 *
 * @author QiaoLiQiang
 * @time 2017年10月14日下午4:55:27
 */
@Controller
@Scope("prototype")
@SuppressWarnings("all")
public class Test2Action extends ActionSupport {
    private String test = "sssssss";

    public String getTest() {
        return "这个是只有get方法";
    }

    @Override
    public String execute() throws Exception {
        return super.execute();
    }

    public void setTest(String test) {
        this.test = test;
    }

}

结果:

 总结:

　　当我们在struts配置文件或者JSP页面中调用${name}的时候实际是调用getName()方法，因此有时候只需要写getName方法而不用写私有属性与set方法也可以完成获取。