PropertiesFactoryBean的注入使用(转载)

素颜马尾好姑娘i 2023-08-17 15:17 160阅读 0赞

使用Spring注入Properies文件方法：

1、src中新建一个settings.properties文件，内容如下：

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db_driverClassName=com.mysql.jdbc.Driver
    db_url=jdbc:mysql://127.0.0.1/test
    db_username=root
    db_password=root
    
    test_userName=Robin
    test_age=18

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2、在spring的applicationContext.xml中加入这段：

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<bean id="configProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
            <property name="locations">
                <list>
                    <value>classpath*:settings.properties</value>
                </list>
            </property>
        </bean>
        <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
            <property name="ignoreResourceNotFound" value="false" />
            <property name="properties" ref="configProperties" />
        </bean>

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之后的spring的xml配置中可以直接这样使用了：

3、新建一个class:Settings.java

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package com.my.common;
    
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.stereotype.Component;
    
    @Component
    public class Settings {
        private static Settings instance;
        public static Settings getInstance() {
            return instance;
        }
        public Settings() {
            instance = this;
        }
        
        @Value("#{configProperties['test_userName']}")
        private String userName;
        @Value("#{configProperties['test_age']}")
        private int age;
        
        public String getUserName() {
            return userName;
        }
        public void setUserName(String userName) {
            this.userName = userName;
        }
        public int getAge() {
            return age;
        }
        public void setAge(int age) {
            this.age = age;
        }
    }

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然后可以在代码中这样调用了：

Settings.getInstance().getUserName()

转载于:https://www.cnblogs.com/tnt-33/p/11412921.html

[copycode.gif]: /images/20230810/f9ea8b5398a14e3ab617ad67a553a745.png