How does spring read the properties file? (with code)

The content of this article is about how spring reads the properties file? (Attached is the code), which has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

Problem:

You need to read the name of the required property on the page through properties. In order to facilitate modification in the future.

Solution:

You can use spring PropertiesFactoryBean reads the properties properties, so you don't need to write a program to read the information through the Properties class of jdk.

<!-- 第二种方式是使用注解的方式注入，主要用在java代码中使用注解注入properties文件中相应的value值 -->
     <bean id="prop" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
         <property name="locations"><!-- 这里是PropertiesFactoryBean类，它也有个locations属性，也是接收一个数组，跟上面一样 -->
             <array>
                 <value>classpath:recommondHouse.properties</value>
             </array>
         </property>
          <!-- 设置编码格式 -->
        <property name="fileEncoding" value="UTF-8"></property>
     </bean>

Note: You need to set fileEncoding, otherwise garbled characters will appear. You also need to set the properties encoding in eclipse. Otherwise, the page will display a bunch of characters and letters, and Chinese characters cannot be displayed. The settings in eclipse are as follows:

As shown in the picture, modify the 3 encoding to utf-8 and click update.

Then inject data through the get and set methods through the @Value annotation.

package com.fyinqing.util;
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;
@Component("test")
public class PropertiesUtil {
    
    @Value("#{prop.name1}")
    private  String name1;
    
    @Value("#{prop.name2}")
    private String name2;
    
    @Value("#{prop.name3}")
    private String name3;
    
    @Value("#{prop.name4}")
    private String name4;
    
    public String getName2() {
        return name2;
    }
    public void setName2(String name2) {
        this.name2 = name2;
    }
    public String getName3() {
        return name3;
    }
    public void setName3(String name3) {
        this.name3 = name3;
    }
    public String getName4() {
        return name4;
    }
    public void setName4(String name4) {
        this.name4 = name4;
    }
    public String getName1() {
        return name1;
    }
    public void setName1(String name1) {
        this.name1 = name1;
    }
    public  List<String> getNameList(){
        List<String> list = new ArrayList<String>();
        list.add(name1);
        list.add(name2);
        list.add(name3);
        list.add(name4);
        return list;
    }
}

The test is as follows: (only the key code is written)

@Autowired
    PropertiesUtil propUtil;
@Test
    public void test4() {
        System.out.println(propUtil.getNameList());
    }

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