java 对象和map的相互转换_java stream 对象转 map-优快云博客

本文介绍了一种在Java中将对象转换为Map及从Map转换回对象的方法。该方法适用于不含静态和final字段的对象，并提供了详细的代码实现。

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class

C {  

    public

static 
Object mapToObject(Map<String, Object> map, Class<?> beanClass) throws

Exception {    

        if

(map == null) 

            return

null;   

        Object
 obj = beanClass.newInstance();  

        Field[]
 fields = obj.getClass().getDeclaredFields();   

        for

(Field field : fields) {    

            int

mod = field.getModifiers();    

            if(Modifier.isStatic(mod)
 || Modifier.isFinal(mod)){    

                continue;   

            }   

            field.setAccessible(true);   

            field.set(obj,
 map.get(field.getName()));   

        }  

        return

obj;    

    }   

    public

static 
Map<String, Object> objectToMap(Object obj) throws

Exception {    

        if(obj
 == null){   

            return

null;   

        }  

        Map<String,
 Object> map = new

HashMap<String, Object>();    

        Field[]
 declaredFields = obj.getClass().getDeclaredFields();    

        for

(Field field : declaredFields) {    

            field.setAccessible(true); 

            map.put(field.getName(),
 field.get(obj));  

        }   

        return

map;  

    }  

}