Convert XML to Object via JAXB - Java XML

Java examples for XML:JAXB

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Description

Convert XML to Object via JAXB

Demo Code


//package com.java2s;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;

import java.util.HashMap;
import java.util.Map;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;

import javax.xml.bind.Unmarshaller;

public class Main {


    private static Map<Class<?>, Unmarshaller> uMap = new HashMap<Class<?>, Unmarshaller>();

    /**//w  ww.  j av  a 2s  .c  o m
     * XML to Object
     * @param <T>
     * @param clazz
     * @param xml
     * @return
     */
    public static <T> T convertToObject(Class<T> clazz, String xml) {
        return convertToObject(clazz, new StringReader(xml));
    }

    /**
     * XML to Object
     * @param <T>
     * @param clazz
     * @param inputStream
     * @return
     */
    public static <T> T convertToObject(Class<T> clazz,
            InputStream inputStream) {
        return convertToObject(clazz, new InputStreamReader(inputStream));
    }

    /**
     * XML to Object
     * @param <T>
     * @param clazz
     * @param reader
     * @return
     */
    @SuppressWarnings("unchecked")
    public static <T> T convertToObject(Class<T> clazz, Reader reader) {
        try {
            if (!uMap.containsKey(clazz)) {
                JAXBContext jaxbContext = JAXBContext.newInstance(clazz);
                Unmarshaller unmarshaller = jaxbContext
                        .createUnmarshaller();
                uMap.put(clazz, unmarshaller);
            }
            return (T) uMap.get(clazz).unmarshal(reader);
        } catch (JAXBException e) {
            e.printStackTrace();
        }
        return null;
    }
}

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