map和bean之间的转化（反射实现）

package reflectTest;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;

public class CommonUtis {
    /**
     * map转化为bean
     * @param map
     * @param object
     * @return
     * @throws InstantiationException
     * @throws IllegalAccessException
     */
    public static Object mapToBean(Map<String,Object> map, Class<?> object) throws InstantiationException, IllegalAccessException {
        Object instance = object.newInstance();
        for(Map.Entry<String, Object> eachMap:map.entrySet()) {
                String property = eachMap.getKey();
                Object value = eachMap.getValue();

                String setMethod = "set"+property.substring(0,1).toUpperCase()+property.substring(1);
                Field field = getField(property,object);
                Class<?> fType = field.getType();
                 value = convert(value,fType);

                 System.out.println(value);
                try {
                    object.getMethod(setMethod, fType).invoke(instance, value);
                } catch (IllegalArgumentException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (NoSuchMethodException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (SecurityException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }


        }

        return instance;
    }
    private static Object convert(Object value, Class<?> fType) {
        Object retVal = null;
        if (Long.class.getName().equals(fType.getName()) || long.class.getName().equals(fType.getName())) {
            retVal =  Long.parseLong(value.toString());

        }
        else if (Float.class.getName().equals(fType.getName()) || float.class.getName().equals(fType.getName())) {
            retVal =  Float.parseFloat(value.toString());

        }
        else if (Double.class.getName().equals(fType.getName()) || double.class.getName().equals(fType.getName())) {
            retVal =  Double.parseDouble(value.toString());

        }
        else if (Integer.class.getName().equals(fType.getName()) || int.class.getName().equals(fType.getName())) {
            retVal = Integer.parseInt(value.toString());

        }
        else {

            retVal = value;
        }
        return retVal;
    }
    public static Field getField(String property,Class<?> obj)
    {
        if (Object.class.getName().equals(obj.getName()))
        {
            return null;
        }
        Field[] field = obj.getDeclaredFields();
        for (Field fe:field) {

            if (fe.getName().equals(property))
            {

                return fe;
            }
        }
        Class<?> parent = obj.getSuperclass();
        if (parent != null)
        {

            return getField(property,parent);
        }
        return null;

    }
    //Bean到Map的转化
    public static Map beanToMap(Object object) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException {
            Field[] field = object.getClass().getDeclaredFields();
            Map map = new HashMap();
            for (Field fi :field )
            {
                String property = fi.getName();
                String getMe  = "get"+property.substring(0, 1).toUpperCase()+property.substring(1);
                Object obj = object.getClass().getMethod(getMe).invoke(object);
                map.put(property,obj);

            }
            return map;

    }

}

实体类

package reflectTest;

public class Person {
    private String name;
    private int age;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    @Override
    public String toString() {
        return "Person [name=" + name + ", age=" + age + "]";
    }


}

测试类：

package reflectTest;

import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;

public class Hello {

    public static void main(String[] args) throws IllegalArgumentException, InvocationTargetException, NoSuchMethodException, SecurityException
    {

        Map map = new HashMap();
        map.put("name", "burning");
        map.put("age", 24);
        try {
            Person person = (Person)CommonUtis.mapToBean(map,Person.class);
            System.out.println(person);
            map = CommonUtis.beanToMap(person);
            System.out.println(map.get("age"));
        } catch (InstantiationException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


    }

}