springboot 读取yml报错?报错

springboot 读取yml配置，当使用prefix时就报错。

代码1（正常）：

@Configuration
@ConfigurationProperties
public class AccountConfig {

    String name;

    public String getName() {
        return name;
    }

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

application.yml配置
name: z张三

代码2（报错）：

@Configuration
@ConfigurationProperties(prefix = "test")
public class AccountConfig {

    String name;

    public String getName() {
        return name;
    }

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

application.yml配置:
test:
  name: z张三

错误信息：

Failed to bind properties under 'test' to com.test.config.AppConfig$$EnhancerBySpringCGLIB$$96509be8:

    Property: test
    Value: 
    Origin: "test" from property source "class path resource
    Reason: No converter found capable of converting from type [java.lang.String] to type [@org.springframework.boot.context.properties.ConfigurationProperties com.test.config.AppConfig$$EnhancerBySpringCGLIB$$96509be8]

Action:

Update your application's configuration