BeanConverter.java

package com.wisedu.scc.love.utils;

import java.lang.reflect.Method;
import java.text.ParseException; 
import java.util.HashMap; 
import java.util.Iterator; 
import java.util.Map;

import org.json.JSONException;
import org.json.JSONObject;

/** 
*转换器 
*1:将JavaBean 转换成Map、JSONObject 
*2:将JSONObject 转换成Map 
*/
public class BeanConverter {

    /**
     * 将javaBean转换成Map
     * @param javaBean
     * @return Map对象
     */
    public static Map<String, String> toMap(Object javaBean) {
        Map<String, String> result = new HashMap<String, String>();
        Method[] methods = javaBean.getClass().getDeclaredMethods();

        for (Method method : methods) {
            try {
                if (method.getName().startsWith("get")) {
                    String field = method.getName();
                    field = field.substring(field.indexOf("get") + 3);
                    field = field.toLowerCase().charAt(0) + field.substring(1);

                    Object value = method.invoke(javaBean, (Object[]) null);
                    result.put(field, null == value ? "" : value.toString());
                }
            } catch (Exception e) {
            }
        }
        return result;
    }

    /**
     * 将json对象转换成Map
     * @param jsonObject json对象
     * @return Map对象
     */
    @SuppressWarnings("unchecked")
    public static Map<String, String> toMap(JSONObject jsonObject) throws JSONException {
        Map<String, String> result = new HashMap<String, String>();
        Iterator<String> iterator = jsonObject.keys();
        String key = null;
        String value = null;
        while (iterator.hasNext()) {
            key = iterator.next();
            value = jsonObject.getString(key);
            result.put(key, value);
        }
        return result;
    }

    /**
     * 将javaBean转换成JSONObject
     * @param bean javaBean
     * @return json对象
     */
    public static JSONObject toJSON(Object bean) {
        return new JSONObject(toMap(bean));
    }

    /**
     * 将map转换成Javabean
     * @param javabean javaBean
     * @param data     map数据
     */
    public static Object toJavaBean(Object javabean, Map<String, String> data) {
        Method[] methods = javabean.getClass().getDeclaredMethods();
        for (Method method : methods) {
            try {
                if (method.getName().startsWith("set")) {
                    String field = method.getName();
                    field = field.substring(field.indexOf("set") + 3);
                    field = field.toLowerCase().charAt(0) + field.substring(1);
                    method.invoke(javabean, new Object[]
                            {
                                    data.get(field)
                            });
                }
            } catch (Exception e) {
            }
        }
        return javabean;
    }

    /**
     * 将javaBean转换成JSONObject
     * @param  javaBean
     * @return json对象
     * @throws ParseException json解析异常
     */
    public static void toJavaBean(Object javaBean, String data) throws ParseException, JSONException {
        JSONObject jsonObject = new JSONObject(data);
        Map<String, String> datas = toMap(jsonObject);
        toJavaBean(javaBean, datas);
    }

}