CurrencyMethod.java

package com.hongqiang.shop.common.template.method;

import java.math.BigDecimal;
import java.util.List;

import org.apache.commons.lang.StringUtils;
import org.springframework.stereotype.Component;

import com.hongqiang.shop.common.utils.Setting;
import com.hongqiang.shop.common.utils.SettingUtils;

import freemarker.template.SimpleScalar;
import freemarker.template.TemplateMethodModel;
/**
 * ftl模板调用的显示商品价格的类
 * @author jackial
 *
 */
@Component("currencyMethod")
public class CurrencyMethod implements TemplateMethodModel {
	/**
	 * 重载TemplateMethodModel的exec方法，接收一个list，为ftl模板中定义方法的参数列表
	 */
	public Object exec(@SuppressWarnings("rawtypes") List arguments) {
		if ((arguments != null) && (!arguments.isEmpty())
				&& (arguments.get(0) != null)
				&& (StringUtils.isNotEmpty(arguments.get(0).toString()))) {
			boolean bool1 = false;
			boolean bool2 = false;
			if (arguments.size() == 2) {
				if (arguments.get(1) != null)
					bool1 = Boolean.valueOf(arguments.get(1).toString()).booleanValue();
			} else if (arguments.size() > 2) {
				if (arguments.get(1) != null)
					bool1 = Boolean.valueOf(arguments.get(1).toString()).booleanValue();
				if (arguments.get(2) != null)
					bool2 = Boolean.valueOf(arguments.get(2).toString()).booleanValue();
			}
			Setting localSetting = SettingUtils.get();
			BigDecimal localBigDecimal = new BigDecimal(arguments.get(0).toString());
			String str = localSetting.setScale(localBigDecimal).toString();
			if (bool1)
				str = localSetting.getCurrencySign() + str;
			if (bool2)
				str = str + localSetting.getCurrencyUnit();
			return new SimpleScalar(str);
		}
		return null;
	}
}