ConfigurationProperties无法将yml或properties中的内容读取到bean解决方法

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//这两个注解必不可少
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@Component
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@ConfigurationProperties(prefix = "test")
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public class TestConfig
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{
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    /** 验证码类型 */
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    private static String captchaType;
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    public static String getCaptchaType() {
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        return captchaType;
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    }
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    public void setCaptchaType(String captchaType) {
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        TestConfig.captchaType = captchaType;
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    }
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}