利用反射打印对象所有属性的工具类

package day01.util;

import java.lang.reflect.Field;

public class EntityUtil {

/**

* @throws IllegalAccessException

* @throws IllegalArgumentException

* @param一个Object对象

* @return传入参数对象的所有属性名及值

*/

public static String entityToString(Object obj) throws IllegalArgumentException, IllegalAccessException

{

Class c = obj.getClass();

if (c == null)

return null;

else

{

StringBuilder sb = new StringBuilder();

String str = getClassFields(obj, c, sb);

return str;

}

}

private static String getClassFields(Object obj, Class c, StringBuilder sb) throws IllegalArgumentException, IllegalAccessException

{

int i;

String name;

Object value;

sb.append(c.getName()).append("[");

Field[] fs = c.getDeclaredFields();

for (i=0; i<fs.length; i++)

{ //start for

fs[i].setAccessible(true);

name = fs[i].getName();

value = fs[i].get(obj);

sb.append(name).append("=").append(value);

if (i != fs.length-1)

sb.append(",");

} //end for

c = c.getSuperclass();

if (c != null && c != Object.class)

{

sb.append(" "); //父类属性前加空格

getClassFields(obj, c, sb);

}

sb.append("]");

return sb.toString();

}

}