八、SpringBoot-从配置文件获取参数映射到对象中

此处提供IDEA-SpringBoot-总目录链接，可查看整个项目过程其他步骤文章：点击此处跳转至总目录链接
此处提供IDEA-SpringBoot-总目录链接，可查看整个项目过程其他步骤文章：点击此处跳转至总目录链接
此处提供IDEA-SpringBoot-总目录链接，可查看整个项目过程其他步骤文章：点击此处跳转至总目录链接

如果我们需要从application.properties中获取多个自定义参数值并映射成对象的时候，可以使用@ConfigurationProperties(prefix = “对象参数名”)的方式获取。

例如：

application.properties

school.name=aaa
school.url=http://www.aaa.com

student.name=bbb
student.url=http://ww.bbb.com

School.java

@Component
@ConfigurationProperties(prefix = "school")
public class School {
    private String name;
    private String url;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }
}

student.java

@Component
@ConfigurationProperties(prefix = "student")
public class Student {
    private String name;
    private String url;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }
}

Controller

@Controller
public class Controller {

    @Autowired
    private School school;
    @Autowired
    private Student student;

    @RequestMapping(value = "/show")
    @ResponseBody
    public String show() {
        return "school.name =" + school.getName() + ",student.url =" + student.getUrl();
    }
}