mvel 配合正则表达式实现文本替换

mvel 依赖

        <dependency>
            <groupId>org.mvel</groupId>
            <artifactId>mvel2</artifactId>
            <version>2.0</version>
        </dependency>

使用

public static String processTemplate(String template, Map<String, Object> params){
        StringBuffer sb = new StringBuffer();
        Matcher m = Pattern.compile("\\$\\{[\\w,\\.]+\\}").matcher(template);
        while (m.find()) {
            String param = m.group();
            Object value = MVEL.eval(param.substring(2, param.length() - 1), params);
            m.appendReplacement(sb, value==null ? "" : value.toString());
        }
        m.appendTail(sb);
        return sb.toString();
    }
    public static void main(String[] args) {
        Map<String, Object> salesMap = new HashMap<>();
        salesMap.put("name", "ttttttttttttt");
        Map<String, Object> param = new HashMap<>();
        param.put("aaaaa",999999999);
        param.put("bbb",10000000000L);
        param.put("sales", salesMap);
        Map<String, Object> param2= new HashMap<>();
        param2.put("param", param);
        String s = StringUtil.processTemplate("sfdfdsfsdfsd${param.sales.name}dfsfsd", param2);
        System.out.println(s);
    }