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  • springboot属性注入方式,读取配置

    读取指定文件

    @PropertySource(value = "classpath:qinjiang.properties")

    1

    application.properties

    jdbc.driverClassName=com.mysql.jdbc.Driver
    jdbc.url=jdbc:mysql://127.0.0.1:3306/springboot_test
    jdbc.username=root
    jdbc.password=root
    JdbcProperties.java
    package com.itheima.config;
    
    import org.springframework.boot.context.properties.ConfigurationProperties;
    /*
    *ConfigurationProperties 从application配置文件中读取配置项
    *prefix 表示配置项的前缀
    * 配置项类中的类变量名必须要与 前缀之后的配置项名称保存 松散绑定(相同)
    * */
    
    @ConfigurationProperties( prefix = "jdbc")
    public class JdbcProperties {
        private String url;
        private String driverClassName;
        private String username;
        private String password;
    
        public String getDriverClassName() {
            return driverClassName;
        }
    
        public void setDriverClassName(String driverClassName) {
            this.driverClassName = driverClassName;
        }
    
        public String getUsername() {
            return username;
        }
    
        public void setUsername(String username) {
            this.username = username;
        }
    
        public String getPassword() {
            return password;
        }
    
        public void setPassword(String password) {
            this.password = password;
        }
    
        public String getUrl() {
            return url;
        }
    
        public void setUrl(String url) {
            this.url = url;
        }
    }
    JdbcConfigSpringBoot.java
    package com.itheima.config;
    
    import com.alibaba.druid.pool.DruidDataSource;
    import org.springframework.boot.context.properties.EnableConfigurationProperties;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    import javax.sql.DataSource;
    @Configuration
    @EnableConfigurationProperties(JdbcProperties.class)
    public class JdbcConfigSpringBoot {
        @Bean
        public DataSource dataSource(JdbcProperties jdbcProperties){
            DruidDataSource dataSource = new DruidDataSource();
            dataSource.setDriverClassName(jdbcProperties.getDriverClassName());
            dataSource.setUrl(jdbcProperties.getUrl());
            dataSource.setUsername(jdbcProperties.getUsername());
            dataSource.setPassword(jdbcProperties.getPassword());
            return dataSource;
        }
    }

     2

    application.properties

    jdbc.driverClassName=com.mysql.jdbc.Driver
    jdbc.url=jdbc:mysql://127.0.0.1:3306/springboot_test
    jdbc.username=root
    jdbc.password=root
    JdbcConfigSpringBoot.java
    package com.itheima.config;
    
    import com.alibaba.druid.pool.DruidDataSource;
    import org.springframework.boot.context.properties.ConfigurationProperties;
    import org.springframework.boot.context.properties.EnableConfigurationProperties;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    
    import javax.sql.DataSource;
    @Configuration
    public class JdbcConfigSpringBoot {
        @Bean
        @ConfigurationProperties(prefix = "jdbc")
        public DataSource dataSource(){
            return new DruidDataSource();
        }
    }
    作者:银龙

    -------------------------------------------

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  • 原文地址:https://www.cnblogs.com/wangyinlon/p/15068831.html
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