XML fastjson互转

JsonXmlUtils.java

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.parser.Feature;
import de.odysseus.staxon.json.JsonXMLConfig;
import de.odysseus.staxon.json.JsonXMLConfigBuilder;
import de.odysseus.staxon.json.JsonXMLInputFactory;
import de.odysseus.staxon.json.JsonXMLOutputFactory;
import de.odysseus.staxon.xml.util.PrettyXMLEventWriter;

import javax.xml.stream.XMLEventReader;
import javax.xml.stream.XMLEventWriter;
import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLOutputFactory;
import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * JSON、XML互转
 * 
 *  https://mvnrepository.com/artifact/de.odysseus.staxon/staxon
 * 	<dependency>
 * 		<groupId>de.odysseus.staxon</groupId>
 * 		<artifactId>staxon</artifactId>
 * 		<version>1.3</version>
 * 	</dependency>
 * 
 *
 */
public class JsonXmlUtils {

    private static final Pattern BLANK = Pattern.compile("\\s*|\t|\r|\n");

    /**
     * convert json string to xml string
     *
     * @param json
     * @return
     */
    public static String json2xml(String json) {
        StringReader input = new StringReader(json);
        StringWriter output = new StringWriter();
        JsonXMLConfig config = new JsonXMLConfigBuilder().multiplePI(false).repairingNamespaces(false).build();
        try {
            XMLEventReader reader = new JsonXMLInputFactory(config).createXMLEventReader(input);
            XMLEventWriter writer = XMLOutputFactory.newInstance().createXMLEventWriter(output);
            writer = new PrettyXMLEventWriter(writer);
            writer.add(reader);
            reader.close();
            writer.close();
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            try {
                output.close();
                input.close();
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return output.toString();
    }

    /**
     * convert jsonObject to xml string
     *
     * @param jsonObject
     * @return
     */
    public static String jsonObj2xml(JSONObject jsonObject) {
        return json2xml(jsonObject.toJSONString());
    }

    /**
     * convert jsonObject to xml string / encoding="GBK"
     *
     * @param jsonObject
     * @return
     */
    public static String jsonObj2xmlGBK(JSONObject jsonObject) {
        return json2xml(jsonObject.toJSONString()).replace("UTF-8", "GBK");
    }

    /**
     * convert xml string to json string
     *
     * @param xml
     * @return
     */
    public static String xml2json(String xml) {
        StringReader input = new StringReader(xml);
        StringWriter output = new StringWriter();
        JsonXMLConfig config = new JsonXMLConfigBuilder().autoArray(true).autoPrimitive(true).prettyPrint(true).build();
        try {
            XMLEventReader reader = XMLInputFactory.newInstance().createXMLEventReader(input);
            XMLEventWriter writer = new JsonXMLOutputFactory(config).createXMLEventWriter(output);
            writer.add(reader);
            reader.close();
            writer.close();
        } catch (Exception e) {
            throw new RuntimeException(e);
        } finally {
            try {
                output.close();
                input.close();
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
        return output.toString();
    }

    /**
     * convert xml string to jsonObject
     *
     * @param xml
     * @return
     */
    public static JSONObject xml2jsonObj(String xml) {
        return JSON.parseObject(xml2json(xml), Feature.OrderedField);
    }

    /**
     * 去掉转换xml之后的换行和空格
     *
     * @param json
     * @return
     */
    public static String json2xmlReplaceBlank(String json) {
        String str = JsonXmlUtils.json2xml(json);
        String dest = "";
        if (str != null) {
            Matcher m = BLANK.matcher(str);
            dest = m.replaceAll("");
        }
        return dest;
    }

}