将字段转驼峰，获取对象中的属性值

// 获取对象中属性的值  
public String getFieldValue(String attrName)
        throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        // 转驼峰
        String standardField = getStandardField(attrName.toLowerCase());
        String getField = "get" + standardField;

        return this.getClass().getMethod(getField).invoke(this).toString();

    }

    // 获取驼峰字段
    private  String getStandardField(String field){
        int index = field.indexOf("_");
        if(index==-1){
            return field.substring(0,1).toUpperCase() + field.substring(1);
        }
        String prefix = field.substring(0, index);
        String upperCase = field.substring(index, index + 2).replace("_","").toUpperCase();
        String suffix = field.substring(index + 2 );
        return getStandardField(prefix + upperCase + suffix);

    }