使用ObjectMapper将对象转为字符串时，如何去除double类型属性的科学计数法

您可以使用ObjectMapper类的configure()方法来配置转换器，以将double类型属性的科学计数法去掉。具体步骤如下：

1. 导入相关的类：

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;

2. 创建ObjectMapper对象：

ObjectMapper objectMapper = new ObjectMapper();

3. 配置ObjectMapper对象的转换器：

objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
objectMapper.configure(SerializationFeature.INDENT_OUTPUT, true);
objectMapper.configure(SerializationFeature.WRITE_DURATIONS_AS_TIMESTAMPS, false);
objectMapper.configure(SerializationFeature.WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS, false);
objectMapper.configure(SerializationFeature.WRITE_DATE_KEYS_AS_TIMESTAMPS, false);
objectMapper.configure(SerializationFeature.WRITE_DATES_WITH_ZONE_ID, false);
objectMapper.configure(SerializationFeature.WRITE_DATES_WITH_ZONE_OFFSET, false);
objectMapper.configure(SerializationFeature.WRITE_DURATIONS_WITH_ZONE_ID, false);
objectMapper.configure(SerializationFeature.WRITE_CHAR_ARRAYS_AS_JSON_ARRAYS, false);
objectMapper.configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING, true);
objectMapper.configure(SerializationFeature.WRITE_NULL_MAP_VALUES, false);
objectMapper.configure(SerializationFeature.WRITE_EMPTY_JSON_ARRAYS, false);
objectMapper.configure(SerializationFeature.WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS, false);
objectMapper.configure(SerializationFeature.WRITE_ENUMS_USING_TO_STRING, true);
objectMapper.configure(SerializationFeature.WRITE_SINGLE_ELEM_ARRAYS_UNWRAPPED, false);
objectMapper.configure(SerializationFeature.WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS, false);
objectMapper.configure(SerializationFeature.WRITE_DATE_TIMESTAMPS_AS_NANOSECONDS, false);

4. 将对象转换为字符串：

String jsonString = objectMapper.writeValueAsString(yourObject);

这样，转换后的字符串中的double类型属性将不再使用科学计数法。