当使用DynamoDBMapper进行对象映射时，如果出现错误消息“不支持；需要 @DynamoDBTyped 或 @DynamoDBTypeConverted”，则表示您需要在代码中使用@DynamoDBTyped或@DynamoDBTypeConverted注解来处理属性。

@DynamoDBTyped注解用于指示DynamoDBMapper属性是一个复杂类型，它将被序列化为DynamoDB的二进制格式。示例如下：

import com.amazonaws.services.dynamodbv2.datamodeling.*;

@DynamoDBTable(tableName = "your_table_name")
public class YourClass {

    private ComplexType complexType;

    @DynamoDBTyped(DynamoDBMapperFieldModel.DynamoDBAttributeType.M)
    public ComplexType getComplexType() {
        return complexType;
    }

    public void setComplexType(ComplexType complexType) {
        this.complexType = complexType;
    }
}

@DynamoDBTypeConverted注解用于指示DynamoDBMapper属性需要进行自定义类型转换。您可以创建一个实现DynamoDBTypeConverter接口的自定义类型转换器，并将其与属性相关联。示例如下：

import com.amazonaws.services.dynamodbv2.datamodeling.*;

@DynamoDBTable(tableName = "your_table_name")
public class YourClass {

    private CustomType customType;

    @DynamoDBTypeConverted(converter = CustomTypeConverter.class)
    public CustomType getCustomType() {
        return customType;
    }

    public void setCustomType(CustomType customType) {
        this.customType = customType;
    }

    public static class CustomTypeConverter implements DynamoDBTypeConverter {

        @Override
        public String convert(CustomType object) {
            // Convert CustomType to String for storage in DynamoDB
            return object.toString();
        }

        @Override
        public CustomType unconvert(String object) {
            // Convert String from DynamoDB to CustomType
            return CustomType.fromString(object);
        }
    }
}

请根据您的具体需求选择适合的注解和转换器类型。