利用JAVA Bean 反射得到set,get方法

/** 
 * java反射bean的get方法 
 *  
 * @param objectClass 
 * @param fieldName 
 * @return 
 */  
@SuppressWarnings("unchecked")  
public static Method getGetMethod(Class objectClass, String fieldName) {  
    StringBuffer sb = new StringBuffer();  
    sb.append("get");  
    sb.append(fieldName.substring(0, 1).toUpperCase());  
    sb.append(fieldName.substring(1));  
    try {  
        return objectClass.getMethod(sb.toString());  
    } catch (Exception e) {  
    }  
    return null;  
}  
  
/** 
 * java反射bean的set方法 
 *  
 * @param objectClass 
 * @param fieldName 
 * @return 
 */  
@SuppressWarnings("unchecked")  
public static Method getSetMethod(Class objectClass, String fieldName) {  
    try {  
        Class[] parameterTypes = new Class[1];  
        Field field = objectClass.getDeclaredField(fieldName);  
        parameterTypes[0] = field.getType();  
        StringBuffer sb = new StringBuffer();  
        sb.append("set");  
        sb.append(fieldName.substring(0, 1).toUpperCase());  
        sb.append(fieldName.substring(1));  
        Method method = objectClass.getMethod(sb.toString(), parameterTypes);  
        return method;  
    } catch (Exception e) {  
        e.printStackTrace();  
    }  
    return null;  
}  
  
/** 
 * 执行set方法 
 *  
 * @param o执行对象 
 * @param fieldName属性 
 * @param value值 
 */  
public static void invokeSet(Object o, String fieldName, Object value) {  
    Method method = getSetMethod(o.getClass(), fieldName);  
    try {  
        method.invoke(o, new Object[] { value });  
    } catch (Exception e) {  
        e.printStackTrace();  
    }  
}  
  
/** 
 * 执行get方法 
 *  
 * @param o执行对象 
 * @param fieldName属性 
 */  
public static Object invokeGet(Object o, String fieldName) {  
    Method method = getGetMethod(o.getClass(), fieldName);  
    try {  
        return method.invoke(o, new Object[0]);  
    } catch (Exception e) {  
        e.printStackTrace();  
    }  
    return null;  
}  

评论

1 楼 freeren 2011-11-11