java模板引擎替换代码

import java.text.ParseException;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;


public class StringTemplateUtils {
	
	public static final String DEF_REGEX="\\{(.+?)\\}";
	
	public static String render(String template, Map<String, String> data) {
		return render(template,data,DEF_REGEX);
	}
	
	public static String render(String template, Map<String, String> data,String regex) {
		if(StringUtils.isBlank(template)){
			return "";
		}
		if(StringUtils.isBlank(regex)){
			return template;
		}
		if(data == null || data.size() == 0){
			return template;
		}
		try {
			StringBuffer sb = new StringBuffer();
			Pattern pattern = Pattern.compile(regex);
			Matcher matcher = pattern.matcher(template);
			while (matcher.find()) {
				String name = matcher.group(1);// 键名
				String value = data.get(name);// 键值
				if (value == null) {value = "";}
				matcher.appendReplacement(sb, value);
			}
			matcher.appendTail(sb);
			return sb.toString();
		} catch (Exception e) {
			e.printStackTrace();
		}
		return template;
		
	}
	
	public static void main(String args[]) throws ParseException {
		String template="您提现{borrowAmount}元至尾号{tailNo}的请求失败，您可以重新提交提款申请。";
		Map<String, String> data = new HashMap<String, String>();
		data.put("borrowAmount", "1000.00");
		data.put("tailNo", "1234");
		System.out.println(render(template,data));
	}
}