java 字符串占位符替换之字符串占位符实现(java简单模板渲染实现)

来源：互联网发布：wps2016数据分析在哪里编辑：程序博客网时间：2024/06/16 02:21

简单实现

关于java字符串占位符替换,专业方式是使用String.format和MessageFormat.format功能,这里提供个简单的基于正则实现的字符串占位符实现

    public static String tpl(String tplStr,Map<String, Object> data ) {         Matcher m=Pattern.compile("\\{([\\w\\.]*)\\}").matcher(tplStr);            while(m.find()){                   String group=m.group();                   group= group.replaceAll("\\{|\\}", "");                   String value="";                   if(null!=data.get(group)){                       value=String.valueOf(data.get(group));                   }                   tplStr=tplStr.replace(m.group(),value);            }            return tplStr;    }

使用freemarker等模板引擎

private String defaultCharacter = "UTF-8";private Configuration cfg;public FreemarkerUtils() {        cfg = new Configuration();        cfg.setDefaultEncoding(defaultCharacter);      cfg.setTagSyntax(Configuration.AUTO_DETECT_TAG_SYNTAX);     }public  String generateString(               Map<String, Object> data,  String tplStr) {          String result = null;          String name="myStrTpl";          try {               StringTemplateLoader stringTemplateLoader= new StringTemplateLoader();              stringTemplateLoader.putTemplate(name, tplStr);                cfg.setTemplateLoader(stringTemplateLoader);                Template template = cfg.getTemplate(name,defaultCharacter);                StringWriter out = new StringWriter();                 template.process(data, out);                  out.flush();                  result= out.toString();                out.close();             } catch (Exception e) {                  e.printStackTrace();              }            return result;      }

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