Java Bean 和 XML之間的轉化 - jackson fasterxml

時間 2019-12-04

標籤 java bean xml 之間轉化 jackson fasterxml 欄目 Java 简体版

原文原文鏈接

之前一直覺得 Java Bean 和 XML 之間的轉化只有不是很規範的 XStream 和學起來很混亂, 用起來不方便的 JAXB(我的觀點). 知道最近發現了 jackson 的 fasterxml. 簡潔方便高效.java

maven 依賴:git

<dependency>
    <groupId>com.fasterxml.jackson.dataformat</groupId>
    <artifactId>jackson-dataformat-xml</artifactId>
</dependency>

GitHub地址: https://github.com/FasterXML/jackson-dataformat-xmlgithub

如下是 SpringBoot 裏面使用示例. 其餘使用詳情, 參考GitHub.spring

package xxx;

import javax.annotation.PostConstruct;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.converter.xml.MappingJackson2XmlHttpMessageConverter;
import org.springframework.stereotype.Component;

import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;

import lombok.SneakyThrows;

@Component
public class XmlUtil {

    @Autowired
    private MappingJackson2XmlHttpMessageConverter xmlConverter;

    private ObjectMapper xmlMapper;

    @PostConstruct
    private void init() {
        xmlMapper = xmlConverter.getObjectMapper();
    }

    @SneakyThrows
    public String toXmlString(Object obj) {
        if (obj == null) {
            return "";
        }
        return xmlMapper.writeValueAsString(obj);
    }

    @SneakyThrows
    public <T> T parseObject(String jsonStr, Class<T> clazz) {
        if (jsonStr == null) {
            return null;
        }
        return xmlMapper.readValue(jsonStr, clazz);
    }

    @SneakyThrows
    public <T> T parseObject(String jsonStr, TypeReference<T> reference) {
        if (jsonStr == null) {
            return null;
        }
        return xmlMapper.readValue(jsonStr, reference);
    }
}

比較經常使用的設置(解析大小寫不敏感和正常忽略多餘字段):json

xmlMapper.configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true);
xmlMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);