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

拼搏现实的明天。 2024-03-26 10:55 93阅读 0赞

**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();
            
        }
        
    }