FreeMarkerUtil

FreeMarkerUtil.java

import freemarker.template.Configuration;
import freemarker.template.Template;
import freemarker.template.TemplateException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.ui.freemarker.FreeMarkerTemplateUtils;
import org.springframework.web.servlet.view.freemarker.FreeMarkerConfigurer;

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

/**
 * Created by guozi on 2018/5/16.
 */
@Slf4j
public class FreeMarkerUtil {

    /**
     * 解析字符串模板
     *
     * @param template 字符串模板信息
     * @param model    替换参数信息
     * @return 替换后的模板
     * @throws IOException
     * @throws TemplateException
     */
    public static String process(String template, Map model) throws IOException, TemplateException {
        Configuration configuration = null;
        FreeMarkerConfigurer freemarkerconfigurer = SpringUtil.getBean("freeMarkerConfigurer", FreeMarkerConfigurer.class);
        if (freemarkerconfigurer != null) {
            configuration = freemarkerconfigurer.getConfiguration();
        }
        return process(template, model, configuration);
    }

    public static String process(String templateContent, Map model, Configuration configuration) throws IOException, TemplateException {
        if (templateContent == null) {
            return null;
        }
        if (configuration == null) {
            configuration = new Configuration(Configuration.VERSION_2_3_26);
        }
        StringWriter stringwriter = new StringWriter();
        try {
            (new Template("templateContent", new StringReader(templateContent), configuration)).process(model, stringwriter);
        } catch (TemplateException | IOException ex) {
            log.error("FTL 解析出错，模板：{},参数：{}", templateContent, model, ex);
            throw ex;
        }
        return stringwriter.toString();
    }

    public static String processTemplate(String templateName, Map model, Configuration configuration) throws IOException, TemplateException {
        if (templateName == null) {
            return null;
        }
        if (configuration == null) {
            configuration = new Configuration(Configuration.VERSION_2_3_26);
        }
        try {
            Template template = configuration.getTemplate(templateName);
            return FreeMarkerTemplateUtils.processTemplateIntoString(template, model);
        } catch (TemplateException | IOException ex) {
            log.error("FTL 解析出错，模板：{},参数：{}", templateName, model, ex);
            throw ex;
        }
    }