ognl(1)

 

package javaseognl;

import ognl.OgnlContext;
import ognl.Ognl;
import ognl.OgnlException;

/**
 * Created by IntelliJ IDEA.
 * User: Administrator
 * Date: 2011-12-29
 * Time: 15:18:46
 * To change this template use File | Settings | File Templates.
 */

/**
 * person bean
 */
class Person {
    private String name;

    public String getName() {
        return name;
    }

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

/**
 * dog bean
 */
class Dog {
    private String name;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}
/**
 * Ognl測試類
 */
public class OgnlTest {
    public static void main(String[] args) throws OgnlException {

        /**
         * 創建Ognl上下文對象
         */
        OgnlContext context = new OgnlContext();

        Person person = new Person();
        Dog dog = new Dog();
        person.setName("zhangsan");
        dog.setName("wangcai");
        /**
         * 把創建的對象放入Ognl上下文對象中
         */
        context.put("person", person);
        context.put("dog", dog);
        /**
         * 設置根對象
         */
        context.setRoot(person);
        /**
         * 解析參數根對象中查找
         */
        Object object = Ognl.parseExpression("name");
        Object o = Ognl.getValue(object, context, context.getRoot());
        /**
         * 取出根對象的屬性
         */
        System.out.println(o);
        /**
         *獲取person對象中的屬性
         */
        Object object1 = Ognl.parseExpression("#person.name");
        Object o1 = Ognl.getValue(object1, context, context.getRoot());
        System.out.println(o1);

        /**
         * 獲取dog對象中的屬性
         */
        Object object2 = Ognl.parseExpression("#dog.name");
        Object o2 = Ognl.getValue(object2, context, context.getRoot());
        System.out.println(o2);

    }
}