xml 解析bean工具类

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目录

概述

在webservice 中常见的解析为bean 的工具类

需求：

1.xmltobean

设计思路

实现思路分析

1.xml2bean

//指定所有class均解析annotations
xstream.autodetectAnnotations(true);
//指定指定class解析annotations
xstream.processAnnotations(People.class);
//

使用xstream自带的NoNameCoder构造xstream，该方式将导致所有特殊字符都不转义
XStream xstream = new XStream(new XppDriver(new NoNameCoder()));
//使用Domdriver及NonameCoder构造xstream，该方式可以指定xml编码方式
XStream xstream = new XStream(new DomDriver(“UTF-8”, new NoNameCoder()));

new Xstream().toXML(bean);

xstreams Utils 的封装：

package com.hibase.common.utils;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;

/**
 * xstream工具类
 *
 * @author hufeng
 * @date 2019/07/09
 */
public class XStreamUtils {

    private XStreamUtils() {
    }

    /**
     * 通过静态内部类实现单例模式
     */
    private static class LazyHolder {
        private static final XStreamUtils INSTANCE = new XStreamUtils();
    }

    private static class SingletonXstream {

        private static XStream xStream = null;

        static {

            if (xStream == null) {

                xStream = new XStream(new DomDriver());
                // 去掉class属性
                xStream.aliasSystemAttribute(null, "class");
                //避免出现以下警告:Security framework of XStream not initialized, XStream is probably vulnerable
                XStream.setupDefaultSecurity(xStream);
            }
        }
    }

    public static XStream getInstance() {

        return SingletonXstream.xStream;
    }

    /**
     * 对象直接转换为XML字符串格式
     *
     * @param t
     * @param 
     * @return
     */
    public static <T> String toXml(T t) {
        XStream xstream = XStreamUtils.getInstance();
        xstream.allowTypeHierarchy(t.getClass());
        xstream.processAnnotations(t.getClass());
        return xstream.toXML(t);
    }

    /**
     * XML直接转化为对象
     *
     * @param xml
     * @param clazz
     * @param 
     * @return
     */
    @SuppressWarnings("unchecked")
    public static <T> T toBean(String xml, Class<T> clazz) {
        XStream xstream = XStreamUtils.getInstance();
        xstream.allowTypeHierarchy(clazz);
        xstream.processAnnotations(clazz);
        T obj = (T) xstream.fromXML(xml);
        return obj;
    }
}

拓展实现

这里参考：github:简单实现上述流程：
入门级实现:
: 部分源码实现.
: 源码实现

性能参数测试：

无，暂时没有

参考资料和推荐阅读

1. xstream特殊字符被转义问题.
2. 使用源码解决xstream特殊字符问题.
3. 使用xmlbeans工具类.

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