freemarker的模板替換

java裏面我們需要使用模板的地方是比較多的,所以在freemarker官網查找資料整理了一個demo.

直接上代碼

maven依賴

<!-- https://mvnrepository.com/artifact/org.freemarker/freemarker -->
        <dependency>
            <groupId>org.freemarker</groupId>
            <artifactId>freemarker</artifactId>
            <version>2.3.23</version>
        </dependency>

編寫幫助類

package com.mqs.util;

import freemarker.cache.StringTemplateLoader;
import freemarker.template.Configuration;
import freemarker.template.Template;
import java.util.Map;

import java.io.StringWriter;

public class FreemarkerUtils {

    private static String defaultCharacter = "UTF-8";
    private static Configuration cfg;

    private FreemarkerUtils() {
    }
    
    static {
        cfg = new Configuration();
        cfg.setDefaultEncoding(defaultCharacter);
        cfg.setTagSyntax(Configuration.AUTO_DETECT_TAG_SYNTAX);
    }    

    public static String processTemplate(String myTemplate, Map<String, Object> map){
        String result = null;
        String name = "template";
   
        try {
            StringTemplateLoader stringTemplateLoader = new StringTemplateLoader();
            stringTemplateLoader.putTemplate(name, myTemplate);
            cfg.setTemplateLoader(stringTemplateLoader);
            Template template = cfg.getTemplate(name, defaultCharacter);
            StringWriter out = new StringWriter();
            template.process(map, out);
            out.flush();
            result = out.toString();
            out.close();
        } catch (Exception e){
            e.printStackTrace();
        }
        return result;
    }

}

 測試類

 public static void main(String[] args){
        Map<String,Object> map= new HashMap<String, Object>();
        map.put("date", "2017-05-11 11:55:55");
        map.put("caseNo", "AJ00000001");
        map.put("descrip", "這是描述信息==========");
        String template="案件編號爲：${caseNo!}   "
                + " 日期爲：${date!} "
                + " 自動獲取日期爲：${ .now?string('yyyy年MM月dd日')}"
                + "描述：${descrip!}";
        String result = FreemarkerUtils.processTemplate(template, map);
        System.out.println(template);
        System.out.println(result);
    }