读取配置文件方式

方式一：XML

配置方式一：

java 复制代码

    <!--引入外部属性文件1-->
    <bean class="org.springframework.context.support.PropertySourcesPlaceholderConfigurer">
        <property name="locations" value="classpath:jdbc.properties"/>
    </bean>

配置方式一：

java 复制代码

<!--引入外部属性文件2-->
    <context:property-placeholder location="classpath:jdbc.properties"/>

配置文件：

bash 复制代码

prop.driverClass=com.mysql.jdbc.Driver
prop.url=jdbc:mysql://localhost:3306/userDb
prop.userName=root
prop.password=abc123

动态取值：

bash 复制代码

    <!--配置连接池--> 
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="url" value="${prop.url}"/>
        <property name="username" value="${prop.userName}"/>
        <property name="password" value="${prop.password}"/>
        <property name="driverClassName" value="${prop.driverClass}"/>
    </bean>

方式一：@ConfigurationProperties(prefix = "xxx")+@Component

java 复制代码

@ConfigurationProperties(prefix = "person")
@Component
@Data
public class Person {
    private String userName;
    private Boolean boss;
    private Date birth;
    private Integer age;
    private Pet pet;
    private String[] interests;
    private List<String> animal;
    private Map<String, Object> score;
    private Set<Double> salarys;
    private Map<String, List<Pet>> allPets;
}

配置文件：application.properties

bash 复制代码

person.user-name=zhangsan
person.boss=true
person.birth=2019/12/9
person.age=18
person.pet.name=阿狗
person.pet.weight=99.99
person.interests=篮球,足球
person.animal=阿猫,阿狗
person.score.english=80
person.score.math=80
person.salarys=9999.98,9999.99
person.all-pets.sick[0].name=阿狗;
person.all-pets.sick[0].weight=99.99
person.all-pets.health[0].name=阿花
person.all-pets.health[1].name=阿明
person.all-pets.health[0].weight=199.99
person.all-pets.health[1].weight=200

#https://blog.csdn.net/qq_35754073/article/details/136606186

测试：

java 复制代码

    @Autowired
    Person person;
    
    @Test
    void test() {
        System.out.println(person);
    }

方式三：@ConfigurationProperties+@EnableConfigurationProperties(xxx.class)

java 复制代码

@ConfigurationProperties(prefix = "person")
@Data
public class Person {
    private String userName;
    private Boolean boss;
    private Date birth;
    private Integer age;
    private Pet pet;
    private String[] interests;
    private List<String> animal;
    private Map<String, Object> score;
    private Set<Double> salarys;
    private Map<String, List<Pet>> allPets;
}

java 复制代码

@EnableConfigurationProperties(Person.class)
@Configuration
public class MyConfig {
    
    @Bean
    public Person person(Person person) {
        System.out.println(person);
        return person;
    }
}

测试：

java 复制代码

@Autowired
MyConfig myConfig;

方式四：@Value+application.properties

配置文件：

bash 复制代码

myconfig.name=1111
myconfig.pwd=2222

测试：application.properties

java 复制代码

    @Value("${myconfig.name}")
    private String name;

    @Value("${myconfig.pwd}")
    private String pwd;

    @Test
    void test2() {
        System.out.println(name);
        System.out.println(pwd);
    }

方式四：@Value+xxx.properties自定义配置文件

配置：other.properties

bash 复制代码

other.name=3333
other.pwd=4444

java 复制代码

@PropertySources({
        @PropertySource("classpath:other.properties")
})
@Configuration
public class OtherConfig {

测试：

java 复制代码

    @Value("${other.name}")
    private String otherName;

    @Value("${other.pwd}")
    private String otherPwd;

    @Test
    void test3() {
        System.out.println(otherName);
        System.out.println(otherPwd);
    }