com.zhangyue.zeus.util.BeanUtils.java Source code

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Here is the source code for com.zhangyue.zeus.util.BeanUtils.java

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/*
 * Copyright 2013 zhangyue.com All right reserved. This software is the
 * confidential and proprietary information of Renren.com ("Confidential
 * Information"). You shall not disclose such Confidential Information and shall
 * use it only in accordance with the terms of the license agreement you entered
 * into with zhangyue.com.
 */
package com.zhangyue.zeus.util;

import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * Mapbean
 * 
 * @date 2013-9-6
 * @author rongneng
 */
public class BeanUtils {

    private final static Log LOG = LogFactory.getLog(BeanUtils.class);
    /**
     * ?mapkey??
     */
    private static final String OMIT_REG = "_";

    /**
     * map???Bean?Bean??mapkey??mapkey?OMIT_REG?
     * 
     * @param <E>
     * @param cla
     * @param mapList
     * @return
     */
    public static <E> List<E> toBeanList(Class<E> cla, List<Map<String, Object>> mapList) {

        List<E> list = new ArrayList<E>(mapList.size());

        for (Map<String, Object> map : mapList) {
            E obj = toBean(cla, map);
            list.add(obj);
        }

        return list;
    }

    /**
     * map??BeanBean??mapkey??mapkey?OMIT_REG?
     * 
     * @param <E>
     * @param cla
     * @param map
     * @return
     */
    @SuppressWarnings({ "rawtypes" })
    public static <E> E toBean(Class<E> cla, Map<String, Object> map) {

        // 
        E obj = null;
        try {
            obj = cla.newInstance();
            if (obj == null) {
                throw new Exception();
            }
        } catch (Exception e) {
            LOG.error(",:" + cla);
            return null;
        }

        // ?mapkey
        Map<String, Object> newmap = new HashMap<String, Object>();
        for (Map.Entry<String, Object> en : map.entrySet()) {
            newmap.put("set" + en.getKey().trim().replaceAll(OMIT_REG, "").toLowerCase(), en.getValue());
        }
        // 
        Method[] ms = cla.getMethods();
        for (Method method : ms) {
            String mname = method.getName().toLowerCase();
            if (mname.startsWith("set")) {

                Class[] clas = method.getParameterTypes();
                Object v = newmap.get(mname);

                if (v != null && clas.length == 1) {
                    try {
                        method.invoke(obj, v);
                    } catch (Exception e) {
                        LOG.error("," + cla + "." + method.getName()
                                + ".?" + clas[0] + ";:" + v.getClass());
                    }
                }
            }
        }

        return obj;
    }
}