首先寫依賴

1 <dependency>
2      <groupId>org.springframework.boot</groupId>
3     <artifactId>spring-boot-configuration-processor</artifactId>
4     <optional>true</optional>
5 </dependency>

@ConfigurationProperties註解的類如下

@ConfigurationProperties(prefix = "club.wenfan.security.browser")
 
public class SecurityProperties {

private VaidateCodeProperties code = new VaidateCodeProperties();
public VaidateCodeProperties getCode() {
        return code;
    }

    public void setCode(VaidateCodeProperties code) {
        this.code = code;
    }

}

VaidateCodeProperties類如下 

package club.wenfan.security.core.properties;

 
/**
 * @author:wenfan
 * @description:
 * @data: 2019/1/1 9:31
 */
public class VaidateCodeProperties {

    private ImgCodeProperties img=new ImgCodeProperties();

    public ImgCodeProperties getImg() {
        return img;
    }

    public void setImg(ImgCodeProperties img) {
        this.img = img;
    }
}
 

ImgCodeProperties 類如下

package club.wenfan.security.core.properties;

/**
 * @author:wenfan
 * @description:
 * @data: 2019/1/1 9:21
 */
public class ImgCodeProperties {

    private  int width = 100;// 定義圖片的width
    private  int height= 30;// 定義圖片的height
    private  int codeCount = 4;// 定義圖片上顯示驗證碼的個數
    private int  expiredTime = 60;

    public int getWidth() {
        return width;
    }

    public void setWidth(int width) {
        this.width = width;
    }

    public int getHeight() {
        return height;
    }

    public void setHeight(int height) {
        this.height = height;
    }

    public int getCodeCount() {
        return codeCount;
    }

    public void setCodeCount(int codeCount) {
        this.codeCount = codeCount;
    }

    public int getExpiredTime() {
        return expiredTime;
    }

    public void setExpiredTime(int expiredTime) {
        this.expiredTime = expiredTime;
    }
}

配置檔案如下

club.wenfan.security.browser.code.img.height=100
club.wenfan.security.browser.code.img.width=100
club.wenfan.security.browser.code.img.codeCount=4
club.wenfan.security.browser.code.img.expiredTime=60

經過多次嘗試，發現:物件名一定要和 Set、 Get 的一致,不然一致導致配置檔案的資訊讀取不到。