javabean People代码

package TestIntrosPector;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class People { 
    private int age;
    private String name;
    private char sex='女';
}

Beanutil转换工具类

package map2javabean;
import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
public class BeanUtil { 
    //一：map2javabean 把map对象转换为javabean
    public  static <T> T map2bean(Map<String, Object> map,Class<T> beantype) throws Exception{ 
         T object=beantype.newInstance();//创建对象
         //获取类的属性描述器
         BeanInfo beaninfo=Introspector.getBeanInfo(beantype,Object.class);
         //获取类的属性集
         PropertyDescriptor[] pro=beaninfo.getPropertyDescriptors();
         for (PropertyDescriptor property : pro) { 
            //获取属性的名字
             String name=property.getName();
             Object value=map.get(name);//得到属性name在map中对应的value。
             Method set=property.getWriteMethod();//得到属性的set方法
             //接下来将map的value转换为属性的value
             set.invoke(object, value);//执行set方法
        }
         return object;
    }
    //二：将javabean转换为map
    public static Map<String,Object> javabean2map(Object bean) throws Exception{ //传入一个javabean对象
        Map<String, Object> map=new HashMap<>();
         //获取类的属性描述器
         BeanInfo beaninfo=Introspector.getBeanInfo(bean.getClass(),Object.class);
         //获取类的属性集
         PropertyDescriptor[] pro=beaninfo.getPropertyDescriptors();
         for (PropertyDescriptor property : pro) { 
            String key=property.getName();//得到属性的name
            Method get=property.getReadMethod();
            Object value=get.invoke(bean);//执行get方法得到属性的值
            map.put(key, value);
        }
        return map;
    }
}

测试Beanutil

package map2javabean;
import java.util.Map;
import TestIntrosPector.People;
public class TestBeanUtil { 
    public static void main(String[] args) throws Exception { 
        //测试javabena2map
        People peo=new People(18, "王麻子", '男');
        Map<String, Object> map=BeanUtil.javabean2map(peo);
        System.out.println("javabena2map>>>:"+map);
        //测试map2javabena
        People people=BeanUtil.map2bean(map, People.class);
        System.out.println("map2javabena>>>:"+people);
    }
}