java后端开发第三篇：springboot中资源属性配置及使用

Posted 2023-02-17 事在人为，幸福从不抱怨开始！

简单记录Springboot中@Configuration,@ConfigurationProperties等与资源属性配置相关的注解使用：

1. pom.xml中添加依赖

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>

2.项目resources目录下创建属性文件，比如Building.properties:

build.buildName=麒麟D座
build.buildHeight=80.8(备注：并非真实数据，仅仅随意写的测试数据)
build.buildAddress=重庆市黄山大道中段杨柳路

3.创建与属性文件同名的实体类：

Component
@Configuration //定义配置类
@ConfigurationProperties(prefix = "build")//指定在配置文件中的前缀
@PropertySource(value = "classpath:Building.properties")//对应配置文件
public class Building 
    private String buildName;//建筑物名称
    private Double buildHeight;//建筑物高度
    private String buildAddress;//建筑物地址

    public String getBuildName() 
        return buildName;
    

    public void setBuildName(String buildName) 
        this.buildName = buildName;
    

    public Double getBuildHeight() 
        return buildHeight;
    

    public void setBuildHeight(Double buildHeight) 
        this.buildHeight = buildHeight;
    

    public String getBuildAddress() 
        return buildAddress;
    

    public void setBuildAddress(String buildAddress) 
        this.buildAddress = buildAddress;
    

    @Override
    public String toString() 
        return "Building" +
                "buildName='" + buildName + '\\'' +
                ", buildHeight=" + buildHeight +
                ", buildAddress='" + buildAddress + '\\'' +
                '';
    

4.编写controller类：

@RestController
public class BuildController 
    @Autowired
    private Building building;

    @GetMapping(value = "/build")
    public String getBuild() 
        return building.toString();
    

5.测试，在浏览器中访问http://localhost:8080/build,获取到的结果如下：
在
在浏览器中显示了我们在配置文件中的内容。