XML转JavaBean的简单实现

一个基于JSON的简单的XML转为Bean的方法

之前在做一个WEB-SERVICE的交互的时候，写的一个基于JSON的XML转Bean的方法；就把它整理处理！ 如下：

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1. pom.xml

   所有需要的依赖包如下：

   <dependency>
       <groupId>net.sf.json-lib</groupId>
       <artifactId>json-lib</artifactId>
       <version>2.4</version>
       <classifier>jdk15</classifier>
   </dependency>
   
   <!-- https://mvnrepository.com/artifact/xom/xom -->
   <dependency>
       <groupId>xom</groupId>
       <artifactId>xom</artifactId>
       <version>1.2.5</version>
   </dependency>
   
   
   <!-- https://mvnrepository.com/artifact/com.alibaba/fastjson -->
   <dependency>
       <groupId>com.alibaba</groupId>
       <artifactId>fastjson</artifactId>
       <version>1.2.15</version>
   </dependency>
   

   
   

2. 转换的工具类：

package com.xtonic.xml2javaBeanUtil;

import java.io.InputStream;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import com.alibaba.fastjson.JSONObject;

import net.sf.json.xml.XMLSerializer;


public class XML2JaveBean {

    private static final ConcurrentHashMap<String, Map<String, Field>> BEAN_FIELDS_CACHE = new ConcurrentHashMap<String, Map<String, Field>>();

    private static final String DATETIME_REG = "\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}\\.\\d{7}((\\+|-)\\d{2}:\\d{2})?";

    private static final String DATE_REG = "\\d{4}[-/]\\d{2}[-/]\\d{2}";

    private static final String DEFAULT_STRING_VALUE = "";

    private XML2JaveBean() {
    }

    public static <T> T XmlToJavaBean(InputStream xmlInputStream,Class<T> clazz) throws Exception {
        String xmlStr = new XMLSerializer().readFromStream(xmlInputStream).toString();
        JSONObject xmlJson = JSONObject.parseObject(xmlStr);
         System.out.println(xmlJson);
         return (T) pareseJSon(xmlJson, clazz);
    }

    @SuppressWarnings({ "unchecked", "rawtypes" })
    private static <T> T pareseJSon(Map<String, Object> context, Class<T> clazz) throws Exception {
        T obj = clazz.newInstance();
        boolean isConllection = false;
        boolean isMap = false;
        Map<String, Field> fieldsCache = getFields(clazz);
        Field field = null;
        CollectionType collectionClass = null;
        Object tmpOjbect = null;
        String fieldKeyStr = null;
        for (String key : context.keySet()) {
            if (key.startsWith("@")) {
                fieldKeyStr = key.substring(1);
            } else {
                fieldKeyStr = key;
            }
            field = fieldsCache.get(fieldKeyStr.toUpperCase());
            // 判断XML里面的节点是否在实体类里面有对应的属性；
            if (field