在我的Spring-Boot应用程序中,我的API使用org.springframework.http.ResponseEntity
返回响应正文
Example:
{
"timestamp": "Oct 2, 2019 3:24:32 PM",
"status": 200,
"error": "OK",
"message": "Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool",
"path": "/a/b/c/d/init"
}
我需要将消息字段格式更改为短格式。
我试图在网上找到它,但发现了其他第三方库的引用,而不是spring的引用。
在我的应用中,我得到了这个配置Bean:
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.text.DateFormat;
@Configuration
public class JacksonConfiguration {
@Bean
public ObjectMapper objectMapper() {
ObjectMapper objectMapper = new ObjectMapper();
objectMapper.enable(JsonParser.Feature.STRICT_DUPLICATE_DETECTION);
objectMapper.setDateFormat(DateFormat.getDateTimeInstance());
return objectMapper;
}
}
是否可以格式化消息字段?
答案 0 :(得分:2)
您可以在jackson中编写一个自定义json序列化程序,并使用@JsonSerialize(using=SerializerClassName.class)
的注释bean属性来决定应使用特定的字符串值做什么
public class Message{
@JsonSerialize(using=MessageSerializer.class)
private String description
//other properties
}
public class MessageSerializer extends JsonSerializer<String> {
@Override
public void serialize(String value, JsonGenerator gen, SerializerProvider serializers) throws IOException, JsonProcessingException {
if(value.length() > 70){
gen.writeString(value.substring(0, 67) + "...");
}
}
}