动态bean生成

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


import org.springframework.cglib.beans.BeanGenerator;
import org.springframework.cglib.beans.BeanMap;


/**
 * 动态bean生成类
 * @author manman
 *
 */
public class DynamicBeanUtil {


/**
* 实体Object
*/
private Object object = null;


/**
* 属性map
*/
private BeanMap beanMap = null;


public DynamicBeanUtil() {
super();
}


public DynamicBeanUtil(Map<String, Object> propertyMap) {
this.object = generateBean(propertyMap);
this.beanMap = BeanMap.create(this.object);
}


/**
* 给bean属性赋值
* 
* @param property 属性名
* 
* @param value
*            值
*/
public void setValue(String property, Object value) {
beanMap.put(property, value);
}


/**
* 通过属性名得到属性值
* 
* @param property 属性名
* 
* @return 值
*/
public Object getValue(String property) {
return beanMap.get(property);
}


/**
* 得到该实体bean对象
* @return
*/
public Object getObject() {
return this.object;
}


/**
* @param propertyMap
* @return
*/
@SuppressWarnings("rawtypes")
private Object generateBean(Map<String, Object> propertyMap) {
BeanGenerator generator = new BeanGenerator();
Set<String> keySet = propertyMap.keySet();
for (Iterator<String> i = keySet.iterator(); i.hasNext();) {
String key = (String) i.next();
generator.addProperty(key, (Class) propertyMap.get(key));
}
return generator.create();
}

/**
* 根据xml属性来创建相应的bean集合
* 
* @param list xml对应的属性集合
* 
* @param dataList 需要生成bean集合的数据集合
* 
* @return
* @throws Exception
*/
public static List<Object> xmlPropCreateBeanList(List<Map<String, Object>> list,List<Map<String, Object>> dataList) throws Exception{
/*
*  设置bean成员属性
*/
Map<String, Object> propertyMap = new LinkedHashMap<>();
for (Map<String, Object> map : list) {
String key = (String) map.get("key");
String value = (String) map.get("type");
propertyMap.put(key, Class.forName(value));
}


/*
*  bean集合
*/
List<Object> objs = new ArrayList<>();
for (Map<String, Object> m : dataList) {
/*
*  生成动态 Bean
*/
DynamicBeanUtil bean = new DynamicBeanUtil(propertyMap);
Set<String> set = m.keySet();
for (String s : set) {
bean.setValue(s, m.get(s).toString());
}
/*
*  获得bean的实体
*/
Object object = bean.getObject();
objs.add(object);
}
return objs;
}

/**
* 测试类
* @param args
* @throws ClassNotFoundException
*/
@SuppressWarnings("rawtypes")
public static void main(String[] args) throws ClassNotFoundException {  
 
        // 设置类成员属性  
        Map<String, Object> propertyMap = new HashMap<>();  
        
        //从xml中读取属性名和属性类型
  
        propertyMap.put("id", Class.forName("java.lang.Integer"));  
  
        propertyMap.put("name", Class.forName("java.lang.String"));  
  
        propertyMap.put("address", Class.forName("java.lang.String"));  
  
        // 生成动态 Bean  
        DynamicBeanUtil bean = new DynamicBeanUtil(propertyMap);  
  
        // 给 Bean 设置值  
        bean.setValue("id", new Integer(123));  
  
        bean.setValue("name", "454");  
  
        bean.setValue("address", "789");  
  
        // 从 Bean 中获取值，当然了获得值的类型是 Object  
  
        System.out.println("  >> id      = " + bean.getValue("id"));  
  
        System.out.println("  >> name    = " + bean.getValue("name"));  
  
        System.out.println("  >> address = " + bean.getValue("address"));  
  
        // 获得bean的实体  
        Object object = bean.getObject();  
  
        // 通过反射查看所有方法名  
        Class clazz = object.getClass();  
        Method[] methods = clazz.getDeclaredMethods();  
        for (int i = 0; i < methods.length; i++) {  
            System.out.println(methods[i].getName());   
        }  
    } 


}