使用spring注入属性文件中的值

妖狐艹你老母 2022-01-10 00:45 338阅读 0赞

通过Spring的@Value注解可以将xml中关联的属性文件中的值注入变量中，这样就不需要通过创建Properties然后根据属性文件读取属性值了。

1、首先定义一个属性文件，其中存储代码中需要引入的属性值

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Rvbmd5dXh1MzQyNzE5_size_16_color_FFFFFF_t_70][]

2、添加一个配置文件spring-config-properties.xml，通过spring容器读取，内容如下：

<?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns="http://www.springframework.org/schema/beans"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xmlns:jaxws="http://cxf.apache.org/jaxws" xmlns:jee="http://www.springframework.org/schema/jee"
          xmlns:aop="http://www.springframework.org/schema/aop"
          xmlns:context="http://www.springframework.org/schema/context"
          xmlns:tx="http://www.springframework.org/schema/tx" xmlns:util="http://www.springframework.org/schema/util"
          xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
           http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd
           http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd
           http://cxf.apache.org/bindings/soap http://cxf.apache.org/schemas/configuration/soap.xsd
           http://www.springframework.org/schema/context  http://www.springframework.org/schema/context/spring-context.xsd
           http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
           http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd">
    
       <util:properties id="configProperties" location="classpath:conf/setting.properties" />
    
    </beans>

3、编写测试类测试注入的效果：

package com.teriste.other;
    
    import org.junit.Test;
    import org.junit.runner.RunWith;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.test.context.ContextConfiguration;
    import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
    
    @RunWith(SpringJUnit4ClassRunner.class)
    @ContextConfiguration({ "classpath:conf/spring/spring-config-properties.xml"})
    public class PropertiesTest {
        @Value("#{configProperties['secretAccessKey']}")
        private String secretAccessKey;
    
        public String getSecretAccessKey() {
            return secretAccessKey;
        }
    
        public void setSecretAccessKey(String secretAccessKey) {
            this.secretAccessKey = secretAccessKey;
        }
    
        @Test
        public void testGetProperties(){
            System.out.println("通过@Value注解注入属性文件中的值："+secretAccessKey);
        }
    }

4、测试结果![20190620200659891.png][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Rvbmd5dXh1MzQyNzE5_size_16_color_FFFFFF_t_70]: /images/20220109/53defe0bbc654577a3e2063842b7fd55.png
[20190620200659891.png]: /images/20220109/3ce60395fdb64392998c1b7e73074b3c.png