无法在Android上运行XML解析器Jackson

Question

无法在Android上运行XML解析器Jackson

 import android.content.Context;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;
import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlProperty;
import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlRootElement;

import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;

import java.io.IOException;
import java.net.URISyntaxException;
import java.util.List;




in onCreate(){
    ObjectMapper xmlMapper = new XmlMapper();
            Channel root = xmlMapper.readValue(stringXML, Channel.class);
}



@JacksonXmlRootElement(localName = "channel")
    public static class Channel {
        public List<Item> channel;
    }

    public static class Item {
        @JacksonXmlProperty(localName = "item")
        public String item;
    }

错误是：

java.lang.NoClassDefFoundError: Failed resolution of: Ljavax/xml/stream/XMLInputFactory;
 Caused by: java.lang.ClassNotFoundException: Didn't find class "javax.xml.stream.XMLInputFactory" on path: DexPathList

Answer 1

老问题但是......

Android没有javax.xml.stream包，这是大多数涉及XML的库所必需的。

要自己添加，请将此依赖项添加到build.gradle文件中：

compile group: 'javax.xml.stream', name: 'stax-api', version: '1.0-2'

这是撰写此评论时的最新版本。您可以查看here以获取更新版本。

Answer 2

您没有正确设置Jackson for Android。请看这页Using jackson-dataformat-xml on android。有很好的描述如何做到。