SpringBoot解析yml/yaml/properties配置文件的四种方式汇总

目录

一、配置文件注入方式一@Value

二、配置文件注入方式二@ConfigurationProperties

三、自定义解析类，直接暴力读取yml配置文件

四、Spring配置文件的解析类Environment获取式

一、配置文件注入方式一@Value

配置文件：

# 严格识别空格

# 属性(String/Byte/Short/Integer/Long/Float/Double/Character/Boolean)
properties:
  name1: 徐城和

# 数组/集合(Arrays/List/Set)
arrays:
  srr1: 小徐,小杨
  srr2: [小张,小林]

# 键值对(Map)
maps:
  map1: {key1: value1,key2: value2}

注入/解析类： 

package parseconfiguration;

import autowired.SubGenericityApplication;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.test.context.SpringBootTest;

import java.util.Set;

/**
 * 配置文件注入方式一@Value
 * 
 * 其中，该注入方式：
 * -仅可注入单属性值和常规数组/集合写法，其它配置或写法需要使用方式二注入
 * -属性不需要Get/Set方法支持
 * -可以注入任意类型数据，自动转换注入
 * -没配置或无法识别或类型无法转换，均会导致配置失败，会报错，因此需要配合default默认值使用
 * 
 * @author Chenghe Xu
 * @date 2023/2/14 10:34
 */
@SpringBootTest(classes = SubGenericityApplication.class)
public class Test01 {
    
    @Value("${properties.name1}")
    private String name1;
    
    @Value("${arrays.srr1}")
//    private String[] srr1;
//    private List<String> srr1;
    private Set<String> srr1;
    
    @Test
    public void test1() {
        
        System.out.println("name1 = " + name1);
        
        System.out.print("srr1 = |");
        for (String s : srr1) {
            System.out.print(s + "|");
        }
        System.out.println();
                
    }
    
}

/**
 * 数组注入时会按英文逗号分割
 * 字符串不会
 */
@SpringBootTest(classes = SubGenericityApplication.class)
class Test01_1 {
    
    /**
     * 在生产环境，@Value防止没配置或注入失败，直接报错，需要配合default使用
     */
    @Value("${properties.name2:没配置,没默认值会直接报错}")
    private String name2;
    
    @Value("${arrays.srr2:无法识别,没默认值会直接报错}")
//    private String[] srr2;
//    private List<String> srr2;
    private Set<String> srr2;
    
    @Value("${maps.map1:类型无法转换,没默认值会直接报错}")
    private String map1;
    
    @Test
    public void test1() {
        
        System.out.println("name2 = " + name2);
    
        System.out.print("srr2 = |");
        for (String s : srr2) {
            System.out.print(s + "|");
        }
        System.out.println();
    
        System.out.println("map1 = " + map1);
    
    }
    
}

二、配置文件注入方式二@ConfigurationProperties

 配置文件：

# 严格识别空格
myproperties:

  # 属性(String/Byte/Short/Integer/Long/Float/Double/Character/Boolean)
  name1: 徐城和
  
  # 数组/集合(Arrays/List/Set)
  srr1: 小徐,小杨
  srr2: [小张,小林]
  srr3:
    - 小君
    - 小白
  
  # 键值对(Map)
  map1: {key1: value1,key2: value2}
  map2:
    key3: value3
    key4: value4
  
  # 对象(Object)
  pet1: {name: 旺财,age: 3}
  pet2: 
    name: 莉莉
    age: 2

注入/解析类： 

package parseconfiguration;

import autowired.SubGenericityApplication;
import lombok.Data;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import java.util.Map;
import java.util.Set;

/**
 * 配置文件注入方式二@ConfigurationProperties
 * 
 * 其中，该注入方式：
 * -需要配合启动类注解标记：@EnableConfigurationProperties({Test02.class})/@ConfigurationPropertiesScan({"parseconfiguration"})
 * -或配合注册为Bean：@Configuration/@Component，或再引入配置处理器依赖：spring-boot-configuration-processor
 * -属性需要Get/Set方法支持
 * -可以注入任意类型数据，自动转换注入
 * -无法识别或类型无法转换，会导致配置失败，会报错；没配置则不注入
 * 
 * @author Chenghe Xu
 * @date 2023/2/17 9:47
 */
@Data
//@Component
//@Configuration
@ConfigurationProperties("myproperties")
@SpringBootTest(classes = SubGenericityApplication.class)
public class Test02 {
    
    private String name1;
    
//    private String[] srr1;
//    private String[] srr2;
//    private String[] srr3;
//    private List<String> srr1;
//    private List<String> srr2;
//    private List<String> srr3;
    private Set<String> srr1;
    private Set<String> srr2;
    private Set<String> srr3;
    
    private Map<String, String> map1;
    private Map<String, String> map2;
    
    private Pet pet1;
    private Pet pet2;
    
    @Test
    public void test1() {
        
        System.out.println("name1 = " + name1);
        
        System.out.print("srr1 = |");
        for (String s : srr1) {
            System.out.print(s + "|");
        }
        System.out.println();
        
        System.out.print("srr2 = |");
        for (String s : srr2) {
            System.out.print(s + "|");
        }
        System.out.println();
        
        System.out.print("srr3 = |");
        for (String s : srr3) {
            System.out.print(s + "|");
        }
        System.out.println();
        
        System.out.print("map1 = |");
        map1.forEach((k, v) -> {
            System.out.print(k + "=");
            System.out.print(v + "|");
        });
        System.out.println();
        
        System.out.print("map2 = |");
        map2.forEach((k, v) -> {
            System.out.print(k + "=");
            System.out.print(v + "|");
        });
        System.out.println();
        
        System.out.println("pet1 = " + pet1);
        System.out.println("pet2 = " + pet2);
        
    }
    
}

@SpringBootTest(classes = SubGenericityApplication.class)
class Test02_1 {
    
    @Autowired
    private Test02 test02;
    
    @Test
    public void test1() {
        
        System.out.println("test02.getName1() = " + test02.getName1());
        
        System.out.println("test02.getSrr1() = " + test02.getSrr1());
        System.out.println("test02.getSrr2() = " + test02.getSrr2());
        System.out.println("test02.getSrr3() = " + test02.getSrr3());
    
        System.out.println("test02.getMap1() = " + test02.getMap1());
        System.out.println("test02.getMap2() = " + test02.getMap2());
    
        System.out.println("test02.getPet1() = " + test02.getPet1());
        System.out.println("test02.getPet2() = " + test02.getPet2());
    
    }
    
}

/**
 * @PostConstruct
 * 实现全局静态变量访问优化
 * -可以优化重复的@Autowired注解，直接静态访问
 */
@Component
class ConfigurationUtil {
    
    public static Test02 staticTest02;
    
    @Autowired
    public Test02 test02;
    
    @PostConstruct
    public void initialize() {
        System.out.println("==Spring容器启动时初始化该方法==");
        staticTest02 = this.test02;
    }
    
}

@SpringBootTest(classes = SubGenericityApplication.class)
class Test02_2 {
    
    @Test
    public void test1() {
        
        System.out.println("ConfigurationUtil.staticTest02.getName1() = " + ConfigurationUtil.staticTest02.getName1());
        
        System.out.println("ConfigurationUtil.staticTest02.getSrr1() = " + ConfigurationUtil.staticTest02.getSrr1());
        System.out.println("ConfigurationUtil.staticTest02.getSrr2() = " + ConfigurationUtil.staticTest02.getSrr2());
        System.out.println("ConfigurationUtil.staticTest02.getSrr3() = " + ConfigurationUtil.staticTest02.getSrr3());
        
        System.out.println("ConfigurationUtil.staticTest02.getMap1() = " + ConfigurationUtil.staticTest02.getMap1());
        System.out.println("ConfigurationUtil.staticTest02.getMap2() = " + ConfigurationUtil.staticTest02.getMap2());
        
        System.out.println("ConfigurationUtil.staticTest02.getPet1() = " + ConfigurationUtil.staticTest02.getPet1());
        System.out.println("ConfigurationUtil.staticTest02.getPet2() = " + ConfigurationUtil.staticTest02.getPet2());
        
    }
    
}

@Data
class Pet {
    
    private String name;
    private Integer age;
    
    @Override
    public String toString() {
        return "|name=" + name + "|age=" + age + '|';
    }
    
}

三、自定义解析类，直接暴力读取yml配置文件

 配置文件：

#####自定义解析类，直接暴力读取yml配置文件#####

# 属性(String/Byte/Short/Integer/Long/Float/Double/Character/Boolean)
properties.username1=大傻逼

# 数组/集合(Arrays/List/Set)
arrys.srr1=1,2,3,4,5
arrys.srr2=1.1,2.2,3.3,4.4,5.5

# 键值对(Map)
maps.map1.key1=vlaue1

# 对象(Object)
pets.pet1.name=小汪
pets.pet1.age=1

注入/解析类： 

package parseconfiguration;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.ClassPathResource;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;
import java.util.Properties;

/**
 * 自定义解析类，直接暴力读取yml配置文件
 *
 * @author Chenghe Xu
 * @date 2023/2/17 15:48
 */
public class Test05 {
    
    public static void main(String[] args) {
//        Properties properties = ConfigurationReader.properties;
        Properties properties = ConfigurationReader.getProperties();
        
        System.out.print("properties = |");
        properties.forEach((k, v) -> {
            System.out.print(k + "=");
            System.out.print(v + "|");
        });
        System.out.println();
        
        System.out.println("properties.username1 = " + ConfigurationReader.getProperty("properties.username1"));
        System.out.println("arrys.srr1 = " + ConfigurationReader.getProperty("arrys.srr1"));
        System.out.println("arrys.srr2 = " + ConfigurationReader.getProperty("arrys.srr2"));
        System.out.println("maps.map1.key1 = " + ConfigurationReader.getProperty("maps.map1.key1"));
        System.out.println("pets.pet1.name = " + ConfigurationReader.getProperty("pets.pet1.name"));
        System.out.println("pets.pet1.age = " + ConfigurationReader.getProperty("pets.pet1.age"));
        
    }
    
}

class ConfigurationReader {
    
    private static final Logger LOGGER = LoggerFactory.getLogger(Test05.class);
    
//    public static Properties properties = new Properties();
    private static Properties properties = new Properties();
    
    public static Properties getProperties() {
        return properties;
    }
    
    public static String getProperty(String key){
        return properties.getProperty(key);
    }
    
    /**
     * static语句块的作用：
     * 由于static修饰的变量或语句块会在类被加载时，仅且执行一次
     * 所以可以进行调用方法初始化(静态)成员变量
     * 即可以通过访问类名访问静态成员变量或其Get方法
     */
    static {
        init();
    }
    
    public static void init() {
        InputStream inputStream = null;
        InputStreamReader inputStreamReader = null;
        BufferedReader bufferedReader = null;
        try {
            // 可解析多个配置文件
            String[] paths = {"application-Test05.properties"};
            for (String path : paths) {
                ClassPathResource resource = new ClassPathResource(path);
                // 处理中文乱码
                inputStream = resource.getInputStream();
//                inputStreamReader = new InputStreamReader(inputStream, "UTF-8");
//                inputStreamReader = new InputStreamReader(inputStream, "utf-8");
                inputStreamReader = new InputStreamReader(inputStream, StandardCharsets.UTF_8);
                bufferedReader = new BufferedReader(inputStreamReader);
//                properties.load(inputStreamReader);
                properties.load(bufferedReader);
            }
            // 关闭资源
            inputStream.close();
            inputStreamReader.close();
            bufferedReader.close();
            LOGGER.info("读取完成");
        } catch (IOException e) {
            LOGGER.error("无法读取配置文件");
        }
    }
    
}

四、Spring配置文件的解析类Environment获取式

 配置文件：

#####Spring配置文件的解析类Environment获取式#####
myproperties:
  es:
    index:
      type:
        documents:
          fields: 小徐001,小徐002,小徐003

注入/解析类：

package parseconfiguration;

import autowired.SubGenericityApplication;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.core.env.Environment;

/**
 * Spring配置文件的解析类Environment获取式
 *
 * @author Chenghe Xu
 * @date 2023/2/21 15:29
 */
@SpringBootTest(classes = SubGenericityApplication.class)
public class Test06 {
    
    // Spring配置文件的解析类
    @Autowired
    private Environment environment;
    
    @Test
    public void test1() {
        
        // 直接匹配获取
        String stringArrays01 = environment.getProperty("myproperties.es.index.type.documents.fields");
        System.out.println("stringArrays01 = " + stringArrays01);
    
        // 指定类型获取
        String[] arrays01 = environment.getProperty("myproperties.es.index.type.documents.fields", String[].class);
        System.out.print("arrays01 = |");
        for (String s : arrays01) {
            System.out.print(s + "|");
        }
        System.out.println();
    
        // 带默认值获取
        String stringArrays02 = environment.getProperty("myproperties.es.index.type.documents.fields01", "没有配置该属性");
        System.out.println("stringArrays02 = " + stringArrays02);
    
        // 综合类型和默认值
        String[] arrays02 = environment.getProperty("myproperties.es.index.type.documents.fields01", 
                String[].class, new String[]{"小徐004","小徐005","小徐006"});
        System.out.print("arrays02 = |");
        for (String s : arrays02) {
            System.out.print(s + "|");
        }
        System.out.println();
        
    }
    
}