Maven 整合FreeMarker使用

pom.xml

<!-- freemarker jar -->
<dependency>
    <groupId>org.freemarker</groupId>
    <artifactId>freemarker</artifactId>
    <version>2.3.20</version>
</dependency>

 testFreeMarker.flt

 您好${name}，现在在测试FreeMarker功能 

FreeMarkerUtil.java

package pers.kangxu.test.util;

import java.io.IOException;
import java.io.StringWriter;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;

/**
 * 
 * <b>
 *    FreeMarkerUtil
 * </b>
 * @author kangxu
 *
 */
public class FreeMarkerUtil {
    
    private static FreeMarkerUtil instance;
    private Configuration config;
    
    String templatePath = "/freeMarker/";
    
    /**
     * instance FreeMarkerUtil
     * @return
     */
    public static FreeMarkerUtil instance() {
        if (instance == null) {
            instance = new FreeMarkerUtil();
        }
        return instance;
    }
    
    /**
     * instance Configuration
     * @param request
     */
    private void configInstance(HttpServletRequest request) {
        if (this.config == null) {
            this.config = new Configuration();
            this.config.setServletContextForTemplateLoading(request.getSession().getServletContext(),templatePath);
        }
    }
    
    /**
     * 通过模板文件生成字符串
     * @param request
     * @param templateFileName
     * @param propMap
     * @return
     */
    public String geneFileStr(HttpServletRequest request,String templateFileName, Map<String, Object> propMap) {
        configInstance(request);
        StringWriter out = new StringWriter();
        Template tmp;
        try {
            tmp = this.config.getTemplate(templateFileName,"UTF-8");
            tmp.setEncoding("UTF-8");
            tmp.process(propMap, out);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (TemplateException e) {
            e.printStackTrace();
        }
        return out.getBuffer().toString();
    }

}

TestController.java

package pers.kangxu.test.controller;

import java.util.HashMap;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import pers.kangxu.test.util.FreeMarkerUtil;


@Controller
@RequestMapping("/test-default")
public class TestController {
    
    @RequestMapping(value="test-freemarker",produces = "application/json; charset=utf-8")
    @ResponseBody
    public String testFreeMarker(HttpServletRequest request){
        
        Map<String,Object> map = new HashMap<String,Object>();
        map.put("name", "【我是名字】");
        
        return FreeMarkerUtil.instance().geneFileStr(request, "testFreeMarker.flt", map);
    }
}

运行结果