Java用正则表达式实现${name}形式的字符串模板实例

尊敬的用户${name}。。。。

/**
  * 根据键值对填充字符串，如("hello ${name}",{name:"xiaoming"})
  * 输出：
  * @param content
  * @param map
  * @return
  */
 public static String renderString(String content, Map<String, String> map){
  Set<Entry<String, String>> sets = map.entrySet();
  for(Entry<String, String> entry : sets) {
   String regex = "\\$\\{" + entry.getKey() + "\\}";
   Pattern pattern = Pattern.compile(regex);
   Matcher matcher = pattern.matcher(content);
   content = matcher.replaceAll(entry.getValue());
  }
  return content;
 }

@Test
 public void renderString() {
  String content = "hello ${name}, 1 2 3 4 5 ${six} 7, again ${name}. ";
  Map<String, String> map = new HashMap<>();
  map.put("name", "java");
  map.put("six", "6");
  content = StringHelper.renderString(content, map);
  System.out.println(content);
 }

hello java, 1 2 3 4 5 6 7, again java.