zno2

util:constant 引入java类中的常量

 

实践一下

package cn.zno.ztest;

public class SomeBean {

    private int i;

    public int getI() {
        return i;
    }

    public void setI(int i) {
        this.i = i;
    }

    @Override
    public String toString() {
        return "SomeBean [i=" + i + "]";
    }
    
}

 spring bean configuration :

    <bean id="someBean" class="cn.zno.ztest.SomeBean">
        <property name="i">
            <util:constant static-field="java.sql.Connection.TRANSACTION_SERIALIZABLE"/>
        </property>
    </bean>

 

测试:

    public static void main(String[] args) {
        String[] xmls = new String[] { "classpath*:spring/root/public_*.xml", "classpath:spring/root/private_*.xml" };
        ApplicationContext ac = new ClassPathXmlApplicationContext(xmls);
        SomeBean bean = (SomeBean)ac.getBean("someBean");
        System.out.println(bean);
    }

结果:

SomeBean [i=8]

应用场景

外层引用内层的静态常量

(JDK依赖 .... 三方依赖 .... 基础包 ... web应用)

 ( 内层 ---------------------> 外层)

 

posted on 2023-06-01 14:16  zno2  阅读(76)  评论(0编辑  收藏  举报

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